From: Andrea Suisani <sickpig@opinioni.net>
To: sthomas@optionshouse.com
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: [OT] linux 3.10 kernel will improve ipc,sysv semaphore scalability
Date: Thu, 16 May 2013 10:47:07 +0200
Message-ID: <51949D0B.6030000@opinioni.net> (raw)
In-Reply-To: <5151F026.5010409@optionshouse.com>
References: <51519CE9.1070409@opinioni.net>
<5151F026.5010409@optionshouse.com>
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Hi all,
On 03/26/2013 07:59 PM, Shaun Thomas wrote:
> On 03/26/2013 08:04 AM, Andrea Suisani wrote:
>
>> TPS:
>> 100 users: 1257.21 (vanilla) 2805.06 (v3 patchset)
>> 400 users: 1437.57 (vanilla) 2664.67 (v3 patchset)
>> 800 users: 1236.89 (vanilla) 2750.73 (v3 patchset)
>
> Wow, I like the look of that. I wonder how this reacts with disabled autogrouping and increasing sched_migration_cost. If the completely fair scheduler has less locking contention with this patch-set, those tweaks may not even be necessary. I need to see if I can find a system to test on.
>
still no time to do proper testing but I just want to inform that the
patchset actually went in the 3.10 first release candidate, as we can see
from git log :)
git log v3.9..v3.10-rc1 --grep="ipc,sem: fine grained locking for semtimedop" -- ipc/sem.c
commit 6062a8dc0517bce23e3c2f7d2fea5e22411269a3
Author: Rik van Riel <riel@surriel.com>
Date: Tue Apr 30 19:15:44 2013 -0700
ipc,sem: fine grained locking for semtimedop
...
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To: pgsql-performance@postgresql.org
Cc: sickpig@opinioni.net, sthomas@optionshouse.com
Subject: Re: [OT] linux 3.10 kernel will improve ipc,sysv semaphore scalability
In-Reply-To: <51949D0B.6030000@opinioni.net>
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