Messages in this thread | | | Subject | Re: CFS review | From | Keith Packard <> | Date | Tue, 28 Aug 2007 21:29:09 -0700 |
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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-1.3.0.0-9.fc7 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?
-- keith.packard@intel.com [unhandled content-type:application/pgp-signature] | |