linux-kernel - Re: CFS review

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Message-Id: <1188362447.3787.9.camel@Homer.simpson.net>
Date:	Wed, 29 Aug 2007 06:40:47 +0200
From:	Mike Galbraith <efault@....de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Al Boldi <a1426z@...ab.com>, Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Keith Packard <keith.packard@...el.com>
Subject: Re: CFS review

On Wed, 2007-08-29 at 06:18 +0200, Ingo Molnar wrote:
> * Al Boldi <a1426z@...ab.com> wrote:
> 
> > No need for framebuffer.  All you need is X using the X.org 
> > vesa-driver.  Then start gears like this:
> > 
> >   # gears & gears & gears &
> > 
> > Then lay them out side by side to see the periodic stallings for 
> > ~10sec.
> 
> i just tried something similar (by adding Option "NoDRI" to xorg.conf) 
> and i'm wondering how it can be smooth on vesa-driver at all. I tested 
> it on a Core2Duo box and software rendering manages to do about 3 frames 
> per second. (although glxgears itself thinks it does ~600 fps) If i 
> start 3 glxgears then they do ~1 frame per second each. This is on 
> Fedora 7 with xorg-x11-server-Xorg-1.3.0.0-9.fc7 and 
> xorg-x11-drv-i810-2.0.0-4.fc7.

At least you can run the darn test... the third instance of glxgears
here means say bye bye to GUI instantly.

	-Mike

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