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* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v4 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.2
----Next_Part(Wed_Jun_10_12_05_10_2020_221)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v4-0002-infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v2 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 046ca5c6c7..9c10bd5fcf 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 3c39e48825..035e83f4f8 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -701,6 +714,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -728,6 +742,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1346,3 +1361,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.2
----Next_Part(Fri_Feb_28_17_06_50_2020_928)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v2-0002-infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v1 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index cd517e8bb4..3912b8b3a0 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -220,7 +220,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 2426cbcf8e..dc04ee5f6f 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -52,6 +52,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -78,6 +79,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -372,7 +375,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -539,12 +542,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -614,6 +620,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -655,6 +666,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index e08507f0cc..5e88c48a1c 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 7be11c48ab..829034516f 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -701,6 +714,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -728,6 +742,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1346,3 +1361,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index bd7af11a8a..d136614587 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index b8261ad866..9c9c845784 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.23.0
----Next_Part(Fri_Dec__6_17_12_11_2019_974)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v1-0002-infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v3 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 05df5017c4..a8b52cd381 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.2
----Next_Part(Thu_Jun__4_15_00_15_2020_826)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v3-0002-infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v6 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 73ce944fb1..9d6b3778b4 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4488,7 +4488,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 4153cc8557..e771ac9610 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Aug_20_16_36_08_2020_519)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v6-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v7 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/postmaster/pgstat.c | 2 +-
src/backend/postmaster/syslogger.c | 2 +-
src/backend/storage/ipc/latch.c | 20 ++++++--
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 ++++
7 files changed, 98 insertions(+), 7 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index ac986c0505..799fa5006d 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index e6be2b7836..30020f8cda 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -4503,7 +4503,7 @@ PgstatCollectorMain(int argc, char *argv[])
pgStatDBHash = pgstat_read_statsfiles(InvalidOid, true, true);
/* Prepare to wait for our latch or data in our socket. */
- wes = CreateWaitEventSet(CurrentMemoryContext, 3);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
AddWaitEventToSet(wes, WL_POSTMASTER_DEATH, PGINVALID_SOCKET, NULL, NULL);
AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
diff --git a/src/backend/postmaster/syslogger.c b/src/backend/postmaster/syslogger.c
index ffcb54968f..a4de6d90e2 100644
--- a/src/backend/postmaster/syslogger.c
+++ b/src/backend/postmaster/syslogger.c
@@ -300,7 +300,7 @@ SysLoggerMain(int argc, char *argv[])
* syslog pipe, which implies that all other backends have exited
* (including the postmaster).
*/
- wes = CreateWaitEventSet(CurrentMemoryContext, 2);
+ wes = CreateWaitEventSet(CurrentMemoryContext, NULL, 2);
AddWaitEventToSet(wes, WL_LATCH_SET, PGINVALID_SOCKET, MyLatch, NULL);
#ifndef WIN32
AddWaitEventToSet(wes, WL_SOCKET_READABLE, syslogPipe[0], NULL, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 63c6c97536..108a6127e9 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -57,6 +57,7 @@
#include "storage/pmsignal.h"
#include "storage/shmem.h"
#include "utils/memutils.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -85,6 +86,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -257,7 +260,7 @@ InitializeLatchWaitSet(void)
Assert(LatchWaitSet == NULL);
/* Set up the WaitEventSet used by WaitLatch(). */
- LatchWaitSet = CreateWaitEventSet(TopMemoryContext, 2);
+ LatchWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 2);
latch_pos = AddWaitEventToSet(LatchWaitSet, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
if (IsUnderPostmaster)
@@ -441,7 +444,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -608,12 +611,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -728,6 +734,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -773,6 +784,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 7c742021fb..ae13d4c08d 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Oct__1_13_43_31_2020_721)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v7-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* [PATCH v5 1/3] Allow wait event set to be registered to resource owner
@ 2017-05-22 03:42 Kyotaro Horiguchi <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Kyotaro Horiguchi @ 2017-05-22 03:42 UTC (permalink / raw)
WaitEventSet needs to be released using resource owner for a certain
case. This change adds WaitEventSet reowner and allow the creator of a
WaitEventSet to specify a resource owner.
---
src/backend/libpq/pqcomm.c | 2 +-
src/backend/storage/ipc/latch.c | 18 ++++-
src/backend/storage/lmgr/condition_variable.c | 2 +-
src/backend/utils/resowner/resowner.c | 67 +++++++++++++++++++
src/include/storage/latch.h | 4 +-
src/include/utils/resowner_private.h | 8 +++
6 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index 7717bb2719..16aefb03ee 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -218,7 +218,7 @@ pq_init(void)
(errmsg("could not set socket to nonblocking mode: %m")));
#endif
- FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, 3);
+ FeBeWaitSet = CreateWaitEventSet(TopMemoryContext, NULL, 3);
AddWaitEventToSet(FeBeWaitSet, WL_SOCKET_WRITEABLE, MyProcPort->sock,
NULL, NULL);
AddWaitEventToSet(FeBeWaitSet, WL_LATCH_SET, -1, MyLatch, NULL);
diff --git a/src/backend/storage/ipc/latch.c b/src/backend/storage/ipc/latch.c
index 91fa4b619b..10d71b46cb 100644
--- a/src/backend/storage/ipc/latch.c
+++ b/src/backend/storage/ipc/latch.c
@@ -56,6 +56,7 @@
#include "storage/latch.h"
#include "storage/pmsignal.h"
#include "storage/shmem.h"
+#include "utils/resowner_private.h"
/*
* Select the fd readiness primitive to use. Normally the "most modern"
@@ -84,6 +85,8 @@ struct WaitEventSet
int nevents; /* number of registered events */
int nevents_space; /* maximum number of events in this set */
+ ResourceOwner resowner; /* Resource owner */
+
/*
* Array, of nevents_space length, storing the definition of events this
* set is waiting for.
@@ -393,7 +396,7 @@ WaitLatchOrSocket(Latch *latch, int wakeEvents, pgsocket sock,
int ret = 0;
int rc;
WaitEvent event;
- WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, 3);
+ WaitEventSet *set = CreateWaitEventSet(CurrentMemoryContext, NULL, 3);
if (wakeEvents & WL_TIMEOUT)
Assert(timeout >= 0);
@@ -560,12 +563,15 @@ ResetLatch(Latch *latch)
* WaitEventSetWait().
*/
WaitEventSet *
-CreateWaitEventSet(MemoryContext context, int nevents)
+CreateWaitEventSet(MemoryContext context, ResourceOwner res, int nevents)
{
WaitEventSet *set;
char *data;
Size sz = 0;
+ if (res)
+ ResourceOwnerEnlargeWESs(res);
+
/*
* Use MAXALIGN size/alignment to guarantee that later uses of memory are
* aligned correctly. E.g. epoll_event might need 8 byte alignment on some
@@ -680,6 +686,11 @@ CreateWaitEventSet(MemoryContext context, int nevents)
StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
#endif
+ /* Register this wait event set if requested */
+ set->resowner = res;
+ if (res)
+ ResourceOwnerRememberWES(set->resowner, set);
+
return set;
}
@@ -725,6 +736,9 @@ FreeWaitEventSet(WaitEventSet *set)
}
#endif
+ if (set->resowner != NULL)
+ ResourceOwnerForgetWES(set->resowner, set);
+
pfree(set);
}
diff --git a/src/backend/storage/lmgr/condition_variable.c b/src/backend/storage/lmgr/condition_variable.c
index 37b6a4eecd..fcc92138fe 100644
--- a/src/backend/storage/lmgr/condition_variable.c
+++ b/src/backend/storage/lmgr/condition_variable.c
@@ -70,7 +70,7 @@ ConditionVariablePrepareToSleep(ConditionVariable *cv)
{
WaitEventSet *new_event_set;
- new_event_set = CreateWaitEventSet(TopMemoryContext, 2);
+ new_event_set = CreateWaitEventSet(TopMemoryContext, NULL, 2);
AddWaitEventToSet(new_event_set, WL_LATCH_SET, PGINVALID_SOCKET,
MyLatch, NULL);
AddWaitEventToSet(new_event_set, WL_EXIT_ON_PM_DEATH, PGINVALID_SOCKET,
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index 8bc2c4e9ea..237ca9fa30 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -128,6 +128,7 @@ typedef struct ResourceOwnerData
ResourceArray filearr; /* open temporary files */
ResourceArray dsmarr; /* dynamic shmem segments */
ResourceArray jitarr; /* JIT contexts */
+ ResourceArray wesarr; /* wait event sets */
/* We can remember up to MAX_RESOWNER_LOCKS references to local locks. */
int nlocks; /* number of owned locks */
@@ -175,6 +176,7 @@ static void PrintTupleDescLeakWarning(TupleDesc tupdesc);
static void PrintSnapshotLeakWarning(Snapshot snapshot);
static void PrintFileLeakWarning(File file);
static void PrintDSMLeakWarning(dsm_segment *seg);
+static void PrintWESLeakWarning(WaitEventSet *events);
/*****************************************************************************
@@ -444,6 +446,7 @@ ResourceOwnerCreate(ResourceOwner parent, const char *name)
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
+ ResourceArrayInit(&(owner->wesarr), PointerGetDatum(NULL));
return owner;
}
@@ -553,6 +556,16 @@ ResourceOwnerReleaseInternal(ResourceOwner owner,
jit_release_context(context);
}
+
+ /* Ditto for wait event sets */
+ while (ResourceArrayGetAny(&(owner->wesarr), &foundres))
+ {
+ WaitEventSet *event = (WaitEventSet *) DatumGetPointer(foundres);
+
+ if (isCommit)
+ PrintWESLeakWarning(event);
+ FreeWaitEventSet(event);
+ }
}
else if (phase == RESOURCE_RELEASE_LOCKS)
{
@@ -725,6 +738,7 @@ ResourceOwnerDelete(ResourceOwner owner)
Assert(owner->filearr.nitems == 0);
Assert(owner->dsmarr.nitems == 0);
Assert(owner->jitarr.nitems == 0);
+ Assert(owner->wesarr.nitems == 0);
Assert(owner->nlocks == 0 || owner->nlocks == MAX_RESOWNER_LOCKS + 1);
/*
@@ -752,6 +766,7 @@ ResourceOwnerDelete(ResourceOwner owner)
ResourceArrayFree(&(owner->filearr));
ResourceArrayFree(&(owner->dsmarr));
ResourceArrayFree(&(owner->jitarr));
+ ResourceArrayFree(&(owner->wesarr));
pfree(owner);
}
@@ -1370,3 +1385,55 @@ ResourceOwnerForgetJIT(ResourceOwner owner, Datum handle)
elog(ERROR, "JIT context %p is not owned by resource owner %s",
DatumGetPointer(handle), owner->name);
}
+
+/*
+ * wait event set reference array.
+ *
+ * This is separate from actually inserting an entry because if we run out
+ * of memory, it's critical to do so *before* acquiring the resource.
+ */
+void
+ResourceOwnerEnlargeWESs(ResourceOwner owner)
+{
+ ResourceArrayEnlarge(&(owner->wesarr));
+}
+
+/*
+ * Remember that a wait event set is owned by a ResourceOwner
+ *
+ * Caller must have previously done ResourceOwnerEnlargeWESs()
+ */
+void
+ResourceOwnerRememberWES(ResourceOwner owner, WaitEventSet *events)
+{
+ ResourceArrayAdd(&(owner->wesarr), PointerGetDatum(events));
+}
+
+/*
+ * Forget that a wait event set is owned by a ResourceOwner
+ */
+void
+ResourceOwnerForgetWES(ResourceOwner owner, WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ if (!ResourceArrayRemove(&(owner->wesarr), PointerGetDatum(events)))
+ elog(ERROR, "wait event set %p is not owned by resource owner %s",
+ events, owner->name);
+}
+
+/*
+ * Debugging subroutine
+ */
+static void
+PrintWESLeakWarning(WaitEventSet *events)
+{
+ /*
+ * XXXX: There's no property to show as an identier of a wait event set,
+ * use its pointer instead.
+ */
+ elog(WARNING, "wait event set leak: %p still referenced",
+ events);
+}
diff --git a/src/include/storage/latch.h b/src/include/storage/latch.h
index 46ae56cae3..b1b8375768 100644
--- a/src/include/storage/latch.h
+++ b/src/include/storage/latch.h
@@ -101,6 +101,7 @@
#define LATCH_H
#include <signal.h>
+#include "utils/resowner.h"
/*
* Latch structure should be treated as opaque and only accessed through
@@ -163,7 +164,8 @@ extern void DisownLatch(Latch *latch);
extern void SetLatch(Latch *latch);
extern void ResetLatch(Latch *latch);
-extern WaitEventSet *CreateWaitEventSet(MemoryContext context, int nevents);
+extern WaitEventSet *CreateWaitEventSet(MemoryContext context,
+ ResourceOwner res, int nevents);
extern void FreeWaitEventSet(WaitEventSet *set);
extern int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd,
Latch *latch, void *user_data);
diff --git a/src/include/utils/resowner_private.h b/src/include/utils/resowner_private.h
index a781a7a2aa..7d19dadd57 100644
--- a/src/include/utils/resowner_private.h
+++ b/src/include/utils/resowner_private.h
@@ -18,6 +18,7 @@
#include "storage/dsm.h"
#include "storage/fd.h"
+#include "storage/latch.h"
#include "storage/lock.h"
#include "utils/catcache.h"
#include "utils/plancache.h"
@@ -95,4 +96,11 @@ extern void ResourceOwnerRememberJIT(ResourceOwner owner,
extern void ResourceOwnerForgetJIT(ResourceOwner owner,
Datum handle);
+/* support for wait event set management */
+extern void ResourceOwnerEnlargeWESs(ResourceOwner owner);
+extern void ResourceOwnerRememberWES(ResourceOwner owner,
+ WaitEventSet *);
+extern void ResourceOwnerForgetWES(ResourceOwner owner,
+ WaitEventSet *);
+
#endif /* RESOWNER_PRIVATE_H */
--
2.18.4
----Next_Part(Thu_Jul__2_11_14_48_2020_705)--
Content-Type: Text/X-Patch; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="v5-0002-Infrastructure-for-asynchronous-execution.patch"
^ permalink raw reply [nested|flat] 51+ messages in thread
* Re: pg_tablespace_location() failure with allow_in_place_tablespaces
@ 2022-03-08 03:01 Kyotaro Horiguchi <[email protected]>
2022-03-15 01:33 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
0 siblings, 1 reply; 51+ messages in thread
From: Kyotaro Horiguchi @ 2022-03-08 03:01 UTC (permalink / raw)
To: [email protected]; +Cc: [email protected]; [email protected]
At Tue, 8 Mar 2022 10:28:46 +0900, Michael Paquier <[email protected]> wrote in
> On Tue, Mar 08, 2022 at 10:06:50AM +0900, Kyotaro Horiguchi wrote:
> > At Tue, 8 Mar 2022 10:39:06 +1300, Thomas Munro <[email protected]> wrote in
> >> Thanks, you're right. Test on a Win10 VM. Here's a new version.
>
> Looks fine to me.
>
> > FYI, on Windows11, pg_basebackup didn't work correctly without the
> > patch. So this looks like fixing an undiscovered bug as well.
>
> Well, that's not really a long-time bug but just a side effect of
> in-place tablespaces because we don't use them in many test cases
> yet, is it?
No, we don't. So just FYI.
> >> pg_basebackup -D copy
> > WARNING: could not read symbolic link "pg_tblspc/16384": Invalid argument
> > pg_basebackup: error: tar member has empty name
> >
> > 1 File(s) 0 bytes
> > 3 Dir(s) 171,920,613,376 bytes free
>
> That's a lot of free space.
The laptop has a 512GB storage, so 160GB is pretty normal, maybe.
129GB of the storage is used by some VMs..
regards.
--
Kyotaro Horiguchi
NTT Open Source Software Center
^ permalink raw reply [nested|flat] 51+ messages in thread
* Re: pg_tablespace_location() failure with allow_in_place_tablespaces
2022-03-08 03:01 Re: pg_tablespace_location() failure with allow_in_place_tablespaces Kyotaro Horiguchi <[email protected]>
@ 2022-03-15 01:33 ` Thomas Munro <[email protected]>
2022-03-15 01:44 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
2022-03-15 01:50 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Michael Paquier <[email protected]>
0 siblings, 2 replies; 51+ messages in thread
From: Thomas Munro @ 2022-03-15 01:33 UTC (permalink / raw)
To: Kyotaro Horiguchi <[email protected]>; +Cc: Michael Paquier <[email protected]>; PostgreSQL Hackers <[email protected]>
On Tue, Mar 8, 2022 at 4:01 PM Kyotaro Horiguchi
<[email protected]> wrote:
> At Tue, 8 Mar 2022 10:28:46 +0900, Michael Paquier <[email protected]> wrote in
> > On Tue, Mar 08, 2022 at 10:06:50AM +0900, Kyotaro Horiguchi wrote:
> > > At Tue, 8 Mar 2022 10:39:06 +1300, Thomas Munro <[email protected]> wrote in
> > >> Thanks, you're right. Test on a Win10 VM. Here's a new version.
> >
> > Looks fine to me.
> >
> > > FYI, on Windows11, pg_basebackup didn't work correctly without the
> > > patch. So this looks like fixing an undiscovered bug as well.
> >
> > Well, that's not really a long-time bug but just a side effect of
> > in-place tablespaces because we don't use them in many test cases
> > yet, is it?
>
> No, we don't. So just FYI.
Ok, I pushed the fix for pg_basebackup.
As for the complaint about pg_tablespace_location() failing, would it
be better to return an empty string? That's what was passed in as
LOCATION. Something like the attached.
Attachments:
[text/x-patch] fix.patch (1017B, ../../CA+hUKGKqPgU=pLUinnqN5qsPS2d3X4XXnYpCuphK2Hwpq03DRA@mail.gmail.com/2-fix.patch)
download | inline diff:
diff --git a/src/backend/utils/adt/misc.c b/src/backend/utils/adt/misc.c
index 4568749d23..1cd70a8eaa 100644
--- a/src/backend/utils/adt/misc.c
+++ b/src/backend/utils/adt/misc.c
@@ -15,6 +15,7 @@
#include "postgres.h"
#include <sys/file.h>
+#include <sys/stat.h>
#include <dirent.h>
#include <fcntl.h>
#include <math.h>
@@ -306,6 +307,24 @@ pg_tablespace_location(PG_FUNCTION_ARGS)
*/
snprintf(sourcepath, sizeof(sourcepath), "pg_tblspc/%u", tablespaceOid);
+ /* Return empty string for in-place tablespaces. */
+#ifdef WIN32
+ if (!pgwin32_is_junction(sourcepath))
+ PG_RETURN_TEXT_P(cstring_to_text(""));
+#else
+ {
+ struct stat stat_buf;
+
+ if (lstat(sourcepath, &stat_buf) < 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not stat file \"%s\": %m",
+ sourcepath)));
+ if (!S_ISLNK(stat_buf.st_mode))
+ PG_RETURN_TEXT_P(cstring_to_text(""));
+ }
+#endif
+
rllen = readlink(sourcepath, targetpath, sizeof(targetpath));
if (rllen < 0)
ereport(ERROR,
^ permalink raw reply [nested|flat] 51+ messages in thread
* Re: pg_tablespace_location() failure with allow_in_place_tablespaces
2022-03-08 03:01 Re: pg_tablespace_location() failure with allow_in_place_tablespaces Kyotaro Horiguchi <[email protected]>
2022-03-15 01:33 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
@ 2022-03-15 01:44 ` Thomas Munro <[email protected]>
1 sibling, 0 replies; 51+ messages in thread
From: Thomas Munro @ 2022-03-15 01:44 UTC (permalink / raw)
To: Kyotaro Horiguchi <[email protected]>; +Cc: Michael Paquier <[email protected]>; PostgreSQL Hackers <[email protected]>
On Tue, Mar 15, 2022 at 2:33 PM Thomas Munro <[email protected]> wrote:
> As for the complaint about pg_tablespace_location() failing, would it
> be better to return an empty string? That's what was passed in as
> LOCATION. Something like the attached.
(Hrrmm, the contract for pgwin32_is_junction() is a little weird:
false means "success, but no" and also "failure, you should check
errno". But we never do.)
^ permalink raw reply [nested|flat] 51+ messages in thread
* Re: pg_tablespace_location() failure with allow_in_place_tablespaces
2022-03-08 03:01 Re: pg_tablespace_location() failure with allow_in_place_tablespaces Kyotaro Horiguchi <[email protected]>
2022-03-15 01:33 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
@ 2022-03-15 01:50 ` Michael Paquier <[email protected]>
2022-03-15 02:55 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
1 sibling, 1 reply; 51+ messages in thread
From: Michael Paquier @ 2022-03-15 01:50 UTC (permalink / raw)
To: Thomas Munro <[email protected]>; +Cc: Kyotaro Horiguchi <[email protected]>; PostgreSQL Hackers <[email protected]>
On Tue, Mar 15, 2022 at 02:33:17PM +1300, Thomas Munro wrote:
> Ok, I pushed the fix for pg_basebackup.
>
> As for the complaint about pg_tablespace_location() failing, would it
> be better to return an empty string? That's what was passed in as
> LOCATION. Something like the attached.
Hmm, I don't think so. The point of the function is to be able to
know the location of a tablespace at SQL level so as we don't have any
need to hardcode its location within any external tests (be it a
pg_regress test or a TAP test) based on how in-place tablespace paths
are built in the backend, so I think that we'd better report either a
relative path from data_directory or an absolute path, but not an
empty string.
In any case, I'd suggest to add a regression test. What I have sent
upthread would be portable enough.
--
Michael
Attachments:
[application/pgp-signature] signature.asc (833B, ../../Yi%2Fw%[email protected]/2-signature.asc)
download
^ permalink raw reply [nested|flat] 51+ messages in thread
* Re: pg_tablespace_location() failure with allow_in_place_tablespaces
2022-03-08 03:01 Re: pg_tablespace_location() failure with allow_in_place_tablespaces Kyotaro Horiguchi <[email protected]>
2022-03-15 01:33 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
2022-03-15 01:50 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Michael Paquier <[email protected]>
@ 2022-03-15 02:55 ` Thomas Munro <[email protected]>
2022-03-15 09:30 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Michael Paquier <[email protected]>
0 siblings, 1 reply; 51+ messages in thread
From: Thomas Munro @ 2022-03-15 02:55 UTC (permalink / raw)
To: Michael Paquier <[email protected]>; +Cc: Kyotaro Horiguchi <[email protected]>; PostgreSQL Hackers <[email protected]>
On Tue, Mar 15, 2022 at 2:50 PM Michael Paquier <[email protected]> wrote:
> On Tue, Mar 15, 2022 at 02:33:17PM +1300, Thomas Munro wrote:
> > As for the complaint about pg_tablespace_location() failing, would it
> > be better to return an empty string? That's what was passed in as
> > LOCATION. Something like the attached.
>
> Hmm, I don't think so. The point of the function is to be able to
> know the location of a tablespace at SQL level so as we don't have any
> need to hardcode its location within any external tests (be it a
> pg_regress test or a TAP test) based on how in-place tablespace paths
> are built in the backend, so I think that we'd better report either a
> relative path from data_directory or an absolute path, but not an
> empty string.
>
> In any case, I'd suggest to add a regression test. What I have sent
> upthread would be portable enough.
Fair enough. No objections here.
^ permalink raw reply [nested|flat] 51+ messages in thread
* Re: pg_tablespace_location() failure with allow_in_place_tablespaces
2022-03-08 03:01 Re: pg_tablespace_location() failure with allow_in_place_tablespaces Kyotaro Horiguchi <[email protected]>
2022-03-15 01:33 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
2022-03-15 01:50 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Michael Paquier <[email protected]>
2022-03-15 02:55 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
@ 2022-03-15 09:30 ` Michael Paquier <[email protected]>
2022-03-15 10:16 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
0 siblings, 1 reply; 51+ messages in thread
From: Michael Paquier @ 2022-03-15 09:30 UTC (permalink / raw)
To: Thomas Munro <[email protected]>; +Cc: Kyotaro Horiguchi <[email protected]>; PostgreSQL Hackers <[email protected]>
On Tue, Mar 15, 2022 at 03:55:56PM +1300, Thomas Munro wrote:
> On Tue, Mar 15, 2022 at 2:50 PM Michael Paquier <[email protected]> wrote:
>> On Tue, Mar 15, 2022 at 02:33:17PM +1300, Thomas Munro wrote:
>> > As for the complaint about pg_tablespace_location() failing, would it
>> > be better to return an empty string? That's what was passed in as
>> > LOCATION. Something like the attached.
>>
>> Hmm, I don't think so. The point of the function is to be able to
>> know the location of a tablespace at SQL level so as we don't have any
>> need to hardcode its location within any external tests (be it a
>> pg_regress test or a TAP test) based on how in-place tablespace paths
>> are built in the backend, so I think that we'd better report either a
>> relative path from data_directory or an absolute path, but not an
>> empty string.
>>
>> In any case, I'd suggest to add a regression test. What I have sent
>> upthread would be portable enough.
>
> Fair enough. No objections here.
So, which one of a relative path or an absolute path do you think
would be better for the user? My preference tends toward the relative
path, as we know that all those tablespaces stay in pg_tblspc/ so one
can make the difference with normal tablespaces more easily. The
barrier is thin, though :p
--
Michael
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^ permalink raw reply [nested|flat] 51+ messages in thread
* Re: pg_tablespace_location() failure with allow_in_place_tablespaces
2022-03-08 03:01 Re: pg_tablespace_location() failure with allow_in_place_tablespaces Kyotaro Horiguchi <[email protected]>
2022-03-15 01:33 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
2022-03-15 01:50 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Michael Paquier <[email protected]>
2022-03-15 02:55 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
2022-03-15 09:30 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Michael Paquier <[email protected]>
@ 2022-03-15 10:16 ` Thomas Munro <[email protected]>
0 siblings, 0 replies; 51+ messages in thread
From: Thomas Munro @ 2022-03-15 10:16 UTC (permalink / raw)
To: Michael Paquier <[email protected]>; +Cc: Kyotaro Horiguchi <[email protected]>; PostgreSQL Hackers <[email protected]>
On Tue, Mar 15, 2022 at 10:30 PM Michael Paquier <[email protected]> wrote:
> So, which one of a relative path or an absolute path do you think
> would be better for the user? My preference tends toward the relative
> path, as we know that all those tablespaces stay in pg_tblspc/ so one
> can make the difference with normal tablespaces more easily. The
> barrier is thin, though :p
Sounds good to me.
^ permalink raw reply [nested|flat] 51+ messages in thread
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2017-05-22 03:42 [PATCH v6 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v3 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v6 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v6 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v5 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v6 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v6 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v5 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v5 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v7 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v5 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2017-05-22 03:42 [PATCH v5 1/3] Allow wait event set to be registered to resource owner Kyotaro Horiguchi <[email protected]>
2022-03-08 03:01 Re: pg_tablespace_location() failure with allow_in_place_tablespaces Kyotaro Horiguchi <[email protected]>
2022-03-15 01:33 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
2022-03-15 01:44 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
2022-03-15 01:50 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Michael Paquier <[email protected]>
2022-03-15 02:55 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
2022-03-15 09:30 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Michael Paquier <[email protected]>
2022-03-15 10:16 ` Re: pg_tablespace_location() failure with allow_in_place_tablespaces Thomas Munro <[email protected]>
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