Re: volanoMark regression with kernel 2.6.26-rc1

Dhaval Giani
2008-05-06T11:52:46Z

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.

--
regards,
Dhaval