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From: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
To: vatsa@linux.vnet.ibm.com
Cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: 2.6.25-rc1: volanoMark 45% regression
Date: Wed, 13 Feb 2008 17:30:28 +0800	[thread overview]
Message-ID: <1202895028.3027.27.camel@ymzhang> (raw)

volanoMark has 45% regression with kernel 2.6.25-rc1 on my both 8-core
stoakley and 16-core Tigerton.

I used bisect to locate below patch.

commit 58e2d4ca581167c2a079f4ee02be2f0bc52e8729
Author: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Date:   Fri Jan 25 21:08:00 2008 +0100

    sched: group scheduling, change how cpu load is calculated



hackbench has about 30% regression on 16-core tigerton, but has about 10% improvement
on 8-core stoakley.

In addition, tbench has about 6% regression on my 8-core stoakley and
25% regression on 16-core stoakley. Some other benchmarks, like netperf/aim7
also have some regression. I will verify if they are all related to the
patch.

-yanmin



             reply	other threads:[~2008-02-13  9:33 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-13  9:30 Zhang, Yanmin [this message]
2008-02-13  9:45 ` Balbir Singh
2008-02-13 12:07   ` Srivatsa Vaddagiri
2008-02-14  7:41     ` Zhang, Yanmin
2008-02-15  9:25       ` Zhang, Yanmin
2008-02-18  4:56         ` Balbir Singh
2008-02-18  5:11           ` Zhang, Yanmin
2008-02-18  5:22             ` Balbir Singh
2008-02-18  6:05               ` Zhang, Yanmin

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