From: Ingo Molnar <mingo@elte.hu>
To: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: aim7 -30% regression in 2.6.24-rc1
Date: Fri, 26 Oct 2007 13:23:07 +0200 [thread overview]
Message-ID: <20071026112307.GA30406@elte.hu> (raw)
In-Reply-To: <1193391787.3019.174.camel@ymzhang>
* Zhang, Yanmin <yanmin_zhang@linux.intel.com> wrote:
> I tested 2.6.24-rc1 on my x86_64 machine which has 2 quad-core processors.
>
> Comparing with 2.6.23, aim7 has about -30% regression. I did a bisect
> and found patch
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=b5869ce7f68b233ceb81465a7644be0d9a5f3dbb
> caused the issue.
weird, that's a commit diff - i.e. it changes no code.
> kbuild/SPECjbb2000/SPECjbb2005 also has big regressions. On my another
> tigerton machine (4 quad-core processors), SPECjbb2005 has more than
> -40% regression. I didn't do a bisect on such benchmark testing, but I
> suspect the root cause is like aim7's.
these two commits might be relevant:
7a6c6bcee029a978f866511d6e41dbc7301fde4c
95dbb421d12fdd9796ed153853daf3679809274f
but a bisection result would be the best info.
Ingo
next prev parent reply other threads:[~2007-10-26 11:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-26 9:43 aim7 -30% regression in 2.6.24-rc1 Zhang, Yanmin
2007-10-26 9:53 ` Peter Zijlstra
2007-10-29 0:15 ` Zhang, Yanmin
2007-10-26 11:23 ` Ingo Molnar [this message]
2007-10-29 2:22 ` Zhang, Yanmin
2007-10-29 9:37 ` Zhang, Yanmin
2007-10-30 2:12 ` Zhang, Yanmin
2007-10-30 7:26 ` Ingo Molnar
2007-10-30 8:36 ` Zhang, Yanmin
2007-10-31 9:57 ` Zhang, Yanmin
2007-10-31 10:30 ` Peter Zijlstra
2007-11-01 8:58 ` Ingo Molnar
[not found] ` <1193922687.27652.279.camel@twins>
[not found] ` <20071101150049.GB4044@elte.hu>
2007-11-01 15:29 ` Peter Zijlstra
2007-11-01 15:36 ` Ingo Molnar
2007-11-01 9:34 ` Zhang, Yanmin
2007-11-01 10:02 ` Cyrus Massoumi
2007-11-05 1:24 ` Zhang, Yanmin
2007-11-05 9:37 ` Cyrus Massoumi
2007-11-07 5:30 ` Zhang, Yanmin
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