linux-kernel - Re: [patch] CFS scheduler, -v6

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Date:	Sun, 29 Apr 2007 08:47:03 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Kasper Sandberg <lkml@...anurb.dk>
Cc:	Gene Heskett <gene.heskett@...il.com>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Williams <pwil3058@...pond.net.au>,
	Thomas Gleixner <tglx@...utronix.de>, caglar@...dus.org.tr,
	Willy Tarreau <w@....eu>, Mark Lord <lkml@....ca>,
	Zach Carter <linux@...hcarter.com>,
	buddabrod <buddabrod@...il.com>
Subject: Re: [patch] CFS scheduler, -v6


* Kasper Sandberg <lkml@...anurb.dk> wrote:

> Okay so i've tried with cfs 7 now, and the completely broken audio 
> behavior is fixed.

great! :) This worried me alot!

> Im not sure im describing properly, but say it takes 35fps for the 3d 
> stuff to seem perfect, the fps monitor updates once every 1 or two 
> seconds, showing average fps(havent looked at the code, but i assume 
> it spans those 1-2 seconds), usually i have like 60 fps, but under 
> load it can go down to 35, [...]

What is this "3D stuff" exactly, and what are you using to monitor the 
framerates? (Also, could you please try another experiment and enable 
CONFIG_PREEMPT? CFS works smoothest with that enabled.)

	Ingo
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