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    SubjectRe: volanoMark regression with kernel 2.6.26-rc1
    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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