Poor compositing performance on 965Q chipset with intel 2.2.1 driver
keithp at keithp.com
Thu May 8 11:02:56 PDT 2008
On Thu, 2008-05-08 at 17:30 +0100, Simon Farnsworth wrote:
> Simon Farnsworth wrote:
> > We're seeing poor compositing performance on 965Q chipset systems, but
> > not Q35 or 945 based systems; until we got the Q35, we'd assumed that
> > this was caused by the synchronous compositing bugs that Carl Worth
> > diagnosed, as the symptom is Xorg taking 100% CPU.
> > Oprofile shows that on the 965Q (but not the Q35 or the 945), Xorg
> > spends most of its time in malloc.
> Sorry, brain-fade - memcpy, not malloc.
An updated libpciaccess may help here - the frame buffer was getting
mapped UC instead of WC.
keith.packard at intel.com
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