From: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>
Subject: sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1
Date: Wed, 07 May 2008 12:55:48 +0800 [thread overview]
Message-ID: <1210136148.3453.59.camel@ymzhang> (raw)
Comparing with kernel 2.6.25, sysbench+mysql(oltp, readonly) has many
regression with 2.6.26-rc1.
1) 8-core stoakley: 28%;
2) 16-core tigerton: 20%;
3) Itanium Montvale: 50%.
Bisect located below patch.
8f1bc385cfbab474db6c27b5af1e439614f3025c is first bad commit
commit 8f1bc385cfbab474db6c27b5af1e439614f3025c
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Sat Apr 19 19:45:00 2008 +0200
sched: fair: weight calculations
In order to level the hierarchy, we need to calculate load based on the
root view. That is, each task's load is in the same unit.
After I manually reverted the patch against 2.6.26-rc1 while fixing a couple of
conflictions/errors, sysbench oltp regression became less than 3% on 8-core
stoakley.
-yanmin
next reply other threads:[~2008-05-07 5:06 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-07 4:55 Zhang, Yanmin [this message]
2008-05-07 9:16 ` sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1 Ingo Molnar
2008-05-07 9:33 ` Zhang, Yanmin
2008-05-07 10:40 ` Ingo Molnar
2008-05-07 16:26 ` Peter Zijlstra
2008-05-08 6:35 ` Zhang, Yanmin
2008-05-08 8:00 ` Mike Galbraith
2008-05-08 8:46 ` Ingo Molnar
2008-05-08 9:25 ` Ingo Molnar
2008-05-08 10:00 ` Mike Galbraith
2008-05-08 9:37 ` Mike Galbraith
2008-05-08 9:01 ` Zhang, Yanmin
2008-05-08 9:13 ` Peter Zijlstra
2008-05-08 9:15 ` Mike Galbraith
2008-05-08 9:22 ` Zhang, Yanmin
2008-05-08 9:23 ` Peter Zijlstra
2008-05-09 1:16 ` Zhang, Yanmin
2008-05-09 6:51 ` Peter Zijlstra
2008-05-09 7:32 ` Mike Galbraith
2008-05-09 7:50 ` Peter Zijlstra
2008-05-09 7:58 ` Mike Galbraith
2008-05-09 8:02 ` Peter Zijlstra
2008-05-09 8:23 ` Mike Galbraith
2008-05-09 9:47 ` Mike Galbraith
2008-05-09 7:59 ` Mike Galbraith
2008-05-09 8:10 ` Peter Zijlstra
2008-05-09 8:25 ` Mike Galbraith
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