From: Mike Galbraith <efault@gmx.de>
To: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: Greg Smith <gsmith@gregsmith.com>,
lkml <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Subject: Re: PostgreSQL pgbench performance regression in 2.6.23+
Date: Thu, 22 May 2008 13:25:53 +0200 [thread overview]
Message-ID: <1211455553.4381.9.camel@marge.simson.net> (raw)
In-Reply-To: <1211452465.7606.8.camel@marge.simson.net>
On Thu, 2008-05-22 at 12:34 +0200, Mike Galbraith wrote:
> (Nadia's ipc/idr patches are applied though, to see if the high end
> improves over previous runs with various kernels, and it does seem to.)
Disregard the above, no they don't. (now removed again)
However. The problem with 2.6.26.git running this testcase appears to
be SYNC_WAKEUPS. No taskset, nada except echo 863 > sched_features
2.6.26.git
1 8173.538610
2 15738.206889
3 23399.356839
4 21401.182501
5 21682.839897
6 26396.301413
8 29910.334798
10 29953.625797
15 29535.740343
20 28950.900431
30 27159.733949
40 24163.344207
50 23258.496794
vs
2.6.22.17-0.1-default (opensuse 10.3 stock kernel)
1 7693.501369
2 15669.304960
3 25340.818410
4 24445.932930
5 22807.019544
6 24051.387364
8 22406.392813
10 22631.510576
15 21225.243584
20 20382.232075
30 18834.814588
40 17799.906622
50 17305.274561
next prev parent reply other threads:[~2008-05-22 11:26 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-21 17:34 PostgreSQL pgbench performance regression in 2.6.23+ Greg Smith
2008-05-22 7:10 ` Mike Galbraith
2008-05-22 8:28 ` Dhaval Giani
2008-05-22 9:05 ` Mike Galbraith
2008-05-22 10:34 ` Mike Galbraith
2008-05-22 11:25 ` Mike Galbraith [this message]
2008-05-22 11:44 ` Peter Zijlstra
2008-05-22 12:09 ` Mike Galbraith
2008-05-22 12:24 ` Peter Zijlstra
2008-05-22 13:16 ` Mike Galbraith
2008-05-23 7:13 ` Greg Smith
2008-05-23 10:00 ` Mike Galbraith
2008-05-23 10:10 ` Ingo Molnar
2008-05-23 10:15 ` Mike Galbraith
2008-05-23 23:18 ` Greg Smith
2008-05-23 23:46 ` Mike Galbraith
2008-05-24 8:08 ` Mike Galbraith
2008-05-27 0:28 ` Greg Smith
2008-05-27 5:59 ` [patch] " Mike Galbraith
2008-05-27 8:20 ` Mike Galbraith
2008-05-27 8:35 ` Mike Galbraith
2008-06-06 5:03 ` Greg Smith
2008-06-06 6:13 ` Mike Galbraith
2008-06-07 11:38 ` Mike Galbraith
2008-06-07 12:50 ` Mike Galbraith
2008-06-07 13:07 ` Peter Zijlstra
2008-06-07 14:16 ` Mike Galbraith
2008-06-07 16:16 ` Peter Zijlstra
2008-06-07 17:56 ` Mike Galbraith
2008-06-07 13:08 ` Peter Zijlstra
2008-06-07 14:54 ` [patch part 2] " Mike Galbraith
2008-06-07 16:12 ` Peter Zijlstra
2008-06-07 17:53 ` Mike Galbraith
2008-06-07 18:19 ` Mike Galbraith
2008-05-23 13:05 ` Mike Galbraith
2008-05-23 13:35 ` Mike Galbraith
-- strict thread matches above, loose matches on Subject: below --
2008-05-23 11:26 Anton Petrusevich
2008-05-23 18:46 ` Greg Smith
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