linux-kernel - Re: CFS review

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Message-ID: <20070829041827.GA8733@elte.hu>
Date:	Wed, 29 Aug 2007 06:18:27 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Al Boldi <a1426z@...ab.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Mike Galbraith <efault@....de>,
	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

* 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.

	Ingo
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