Re: [patch] CFS scheduler, -v6

From: Ingo Molnar
Date: Sun Apr 29 2007 - 04:08:41 EST

* Kasper Sandberg <lkml@xxxxxxxxxxx> wrote:

> If you have some ideas on how these problems might be fixed i'd surely
> try fixes and stuff, or if you have some data you need me to collect
> to better understand whats going on. But i suspect any somewhat
> demanding 3d application will do, and the difference is so staggering
> that when you see it in effect, you cant miss it.

it would be great if you could try a simple experiment: does something
as simple as glxgears resized to a large window trigger this
'stuttering' phenomenon when other stuff is running? If not, could you
try to find the simplest 3D stuff under Linux that already triggers it
so that i can reproduce it?

(Also, as an independent debug-test, could you try CONFIG_PREEMPT too
perhaps? I.e. is this 'stuttering' behavior independent of the
preemption model and a general property of CFS?)

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