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SubjectRe: Performance issue since 3.2.6
Date
On Monday, January 21, 2013 03:26:10 PM Olivier Doucet wrote:
> >> FYI, I benchmarked a new version with :
> >> CONFIG_PM_RUNTIME=y
> >> CONFIG_PM=y
> >>
> >> but the performance loss is still present.
> >
> > In that case it is not quite likely that the commit you bisected to
> > really introduced the problem, because it doesn't change things for
> > CONFIG_PM=y.
> >
> > Does reverting that commit still help?
>
> I tested several combinations. Results follows :
> 3.2.6 (base) + CONFIG_PM unset => BAD
> 3.2.6 (base) + CONFIG_PM=y => BAD
> 3.2.6 (base) + patch reverted + CONFIG_PM=y => BAD
> 3.2.6 (base) + patch reverted + CONFIG_PM unset => GOOD

I see. Two bugs, then.

> So if I understand right, the targeted patch introduced the bug when
> CONFIG_PM is unset, but there is an other bug when this var is set.
> I'll try to track this commit.

Thanks a lot!

Rafael


--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.


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