Subject: Re: [Bug #11207] VolanoMark regression with 2.6.27-rc1
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>, "Rafael J. Wysocki" <rjw@sisk.pl>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Kernel Testers List <kernel-testers@vger.kernel.org>,
       Dhaval Giani <dhaval@linux.vnet.ibm.com>,
       Miao Xie <miaox@cn.fujitsu.com>
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Date: Wed, 08 Oct 2008 09:03:56 +0200
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On Wed, 2008-10-08 at 10:36 +0800, Zhang, Yanmin wrote:

> > Sadly not much, I can't seem to reproduce :-(
> The regression is bigger with more cpu.

Yep :-(

> > 
> > Yanmin, does the wakeup patch I did for oltp help this workload any?
> > 
> > http://marc.info/?l=linux-kernel&m=122194673932703&w=4
> I tested it against 2.6.29-rc9 on 8-core stoakley and 16-core tigerton. volanoMark
> chatroom number is default 10.
> Basically, comparing with pure 2.6.27-rc9, the patched kernel's result has about 2%
> regression. Group scheduling is enabled.

Ok, so that didn't help. Thanks for testing!

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