Messages in this thread | | | Date | Wed, 7 May 2008 23:03:57 +0530 | From | Dhaval Giani <> | Subject | Re: volanoMark regression with kernel 2.6.26-rc1 |
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On Tue, May 06, 2008 at 05:22:07PM +0530, Dhaval Giani wrote: > On Tue, May 06, 2008 at 10:06:30AM +0800, Zhang, Yanmin wrote: > > Comparing with 2.6.25, volanoMark has big regression with kernel 2.6.26-rc1. > > It's about 50% on my 8-core stoakley, 16-core tigerton, and Itanium Montecito. > > > > With bisect, I located below patch. > > > > 18d95a2832c1392a2d63227a7a6d433cb9f2037e is first bad commit > > commit 18d95a2832c1392a2d63227a7a6d433cb9f2037e > > Author: Peter Zijlstra <a.p.zijlstra@chello.nl> > > Date: Sat Apr 19 19:45:00 2008 +0200 > > > > sched: fair-group: SMP-nice for group scheduling > > > > Implement SMP nice support for the full group hierarchy. > > > > If I reverse the patch with resolving some conflictions, volanoMark result could > > be restored completely. > > > > ok, that's bad. Let's get vatsa and Ingo also involved. >
Just to confirm, do you still have a performance regression with !group_sched?
-- regards, Dhaval
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