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SubjectRe: CFS review
On Wed, 2007-08-29 at 06:18 +0200, Ingo Molnar wrote:

> > Then lay them out side by side to see the periodic stallings for
> > ~10sec.

The X scheduling code isn't really designed to handle software GL well;
the requests can be very expensive to execute, and yet are specified as
atomic operations (sigh).

> 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- and
> xorg-x11-drv-i810-2.0.0-4.fc7.

Are you attempting to measure the visible updates by eye? Or are you
using some other metric?

In any case, attempting to measure anything using glxgears is a bad
idea; it's not representative of *any* real applications. And then using
software GL on top of that...

What was the question again?

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