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Re: [CORE] postpone next week's release
263+ messages / 2 participants
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* Re: [CORE] postpone next week's release
@ 2015-06-02 05:44  Noah Misch <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Noah Misch @ 2015-06-02 05:44 UTC (permalink / raw)
  To: David Steele <[email protected]>; +Cc: Joshua D. Drake <[email protected]>; Robert Haas <[email protected]>; Bruce Momjian <[email protected]>; Tom Lane <[email protected]>; Andres Freund <[email protected]>; Stephen Frost <[email protected]>; Magnus Hagander <[email protected]>; pgsql-hackers; pgsql-core <[email protected]>

On Sun, May 31, 2015 at 12:09:16PM -0400, David Steele wrote:
> On 5/31/15 11:49 AM, Noah Misch wrote:
> > On Sat, May 30, 2015 at 09:51:04PM -0400, David Steele wrote:
> >> Sure - I can write code to do that.  But then why release a beta at all?
> > 
> > It's largely for the benefit of folks planning manual, or otherwise high-cost,
> > testing.  If you budget for just one big test per year, make it a test of
> > beta1.  For inexpensive testing, you may as well ignore beta and test git
> > master daily or weekly.
> 
> I've gotten to the point of (relatively) high-cost coding/testing.  The
> removal of checkpoint_segments and pause_on_recovery are leading to
> refactoring of not only the regressions tests but the actual backup
> code.  9.5 and 8.3 are the only versions that require exceptions in the
> code base.
> 
> I've already done basic testing against 9.5 by disabling certain tests.
>  Now I'm at the point where I need to start modifying code to take new
> 9.5 features/changes into account and make sure the regression tests
> work for 8.3-9.5 with the fewest number of exceptions possible.

Release of beta1 is the cue for that sort of work.

> From the perspective of backup/restore testing, 9.5 has the most changes
> since 9.0.  I'd like to know that the API at least is stable before
> investing the time in new development.

Its API will be as good as pgsql-hackers could make it; beta1 is also a call
for help discovering API problems we overlooked.  Subsequent API changes are
usually reactions to beta test reports.


-- 
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^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread

* [PATCH v1 1/2] WIP: Change instr_time to just store nanoseconds, that's cheaper.
@ 2020-05-28 21:52  Andres Freund <[email protected]>
  0 siblings, 0 replies; 263+ messages in thread

From: Andres Freund @ 2020-05-28 21:52 UTC (permalink / raw)

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:
---
 src/include/portability/instr_time.h | 62 ++++++++++++----------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/src/include/portability/instr_time.h b/src/include/portability/instr_time.h
index d6459327ccf..fc058d548a8 100644
--- a/src/include/portability/instr_time.h
+++ b/src/include/portability/instr_time.h
@@ -83,63 +83,53 @@
 #define PG_INSTR_CLOCK	CLOCK_REALTIME
 #endif
 
-typedef struct timespec instr_time;
+typedef int64 instr_time;
+#define NS_PER_S INT64CONST(1000000000)
+#define US_PER_S INT64CONST(1000000)
+#define MS_PER_S INT64CONST(1000)
 
-#define INSTR_TIME_IS_ZERO(t)	((t).tv_nsec == 0 && (t).tv_sec == 0)
+#define NS_PER_MS INT64CONST(1000000)
+#define NS_PER_US INT64CONST(1000)
 
-#define INSTR_TIME_SET_ZERO(t)	((t).tv_sec = 0, (t).tv_nsec = 0)
+#define INSTR_TIME_IS_ZERO(t)	((t) == 0)
 
-#define INSTR_TIME_SET_CURRENT(t)	((void) clock_gettime(PG_INSTR_CLOCK, &(t)))
+#define INSTR_TIME_SET_ZERO(t)	((t) = 0)
+
+static inline instr_time pg_clock_gettime_ns(void)
+{
+	struct timespec tmp;
+
+	clock_gettime(PG_INSTR_CLOCK, &tmp);
+
+	return tmp.tv_sec * NS_PER_S + tmp.tv_nsec;
+}
+
+#define INSTR_TIME_SET_CURRENT(t) \
+	(t) = pg_clock_gettime_ns()
 
 #define INSTR_TIME_ADD(x,y) \
 	do { \
-		(x).tv_sec += (y).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y); \
 	} while (0)
 
 #define INSTR_TIME_SUBTRACT(x,y) \
 	do { \
-		(x).tv_sec -= (y).tv_sec; \
-		(x).tv_nsec -= (y).tv_nsec; \
-		/* Normalize */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
+		(x) -= (y); \
 	} while (0)
 
 #define INSTR_TIME_ACCUM_DIFF(x,y,z) \
 	do { \
-		(x).tv_sec += (y).tv_sec - (z).tv_sec; \
-		(x).tv_nsec += (y).tv_nsec - (z).tv_nsec; \
-		/* Normalize after each add to avoid overflow/underflow of tv_nsec */ \
-		while ((x).tv_nsec < 0) \
-		{ \
-			(x).tv_nsec += 1000000000; \
-			(x).tv_sec--; \
-		} \
-		while ((x).tv_nsec >= 1000000000) \
-		{ \
-			(x).tv_nsec -= 1000000000; \
-			(x).tv_sec++; \
-		} \
+		(x) += (y) - (z); \
 	} while (0)
 
 #define INSTR_TIME_GET_DOUBLE(t) \
-	(((double) (t).tv_sec) + ((double) (t).tv_nsec) / 1000000000.0)
+	((double) (t) / NS_PER_S)
 
 #define INSTR_TIME_GET_MILLISEC(t) \
-	(((double) (t).tv_sec * 1000.0) + ((double) (t).tv_nsec) / 1000000.0)
+	((double) (t) / NS_PER_MS)
 
 #define INSTR_TIME_GET_MICROSEC(t) \
-	(((uint64) (t).tv_sec * (uint64) 1000000) + (uint64) ((t).tv_nsec / 1000))
+	((double) (t) / NS_PER_US)
 
 #else							/* !HAVE_CLOCK_GETTIME */
 
-- 
2.25.0.114.g5b0ca878e0


--wn4ncs637ccpvbhb
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch"



^ permalink  raw  reply  [nested|flat] 263+ messages in thread