Re: [patch] CFS scheduler, -v19

Bill Davidsen
2007-07-11T17:22:36Z

Mike Galbraith wrote:
> Greetings,
>
> On Fri, 2007-07-06 at 19:33 +0200, Ingo Molnar wrote:
>> i'm pleased to announce release -v19 of the CFS scheduler patchset.
>
> I've taken mainline git tree (freshly integrated CFS!) out for a
> multimedia spin. I tested watching movies and listenign to music in the
> presence of various sleep/burn loads, pure burn loads, and mixed loads.
> All was peachy here.. I saw no frame drops or sound skips or other
> artifacts under any load where the processor could possibly meet demand.
>
I would agree with preliminary testing, save that if you get a lot of
processes updating the screen at once, there seems to be a notable case
of processes getting no CPU for 100-300ms, followed by a lot of CPU.

I see this clearly with the "glitch1" test with four scrolling xterms
and glxgears, but also watching videos with little busy processes on the
screen. The only version where I never see this in test or with real use
is cfs-v13.

--
Bill Davidsen <davidsen@tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot