linux-kernel - Re: Sched - graphic smoothness under load

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Date:	Wed, 23 May 2007 20:43:46 +0200
From:	Xavier Bestel <xavier.bestel@...e.fr>
To:	Ian Romanick <idr@...ibm.com>
Cc:	Linux Kernel M/L <linux-kernel@...r.kernel.org>
Subject: Re: Sched - graphic smoothness under load - cfs-v13 sd-0.48

Le mercredi 23 mai 2007 à 11:22 -0700, Ian Romanick a écrit :
> > I think some people forget that X11 has its own scheduler for graphics
> > operations.
> 
> And in the direct-rendering case, this scheduler is not used for OpenGL.
>  The client-side driver submits rendering commands directly to its
> kernel module.  It is possible that some kernel modules perform some
> sort of scheduling, but none of the open-source drivers implement such a
> thing.

True, but glxgears isn't a pure DRI app: it calls XNextEvent() each time
it refreshes its window (which is quite often).

	Xav


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