Poor compositing performance on 965Q chipset with intel 2.2.1 driver

Keith Packard 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
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL: <http://lists.x.org/archives/xorg/attachments/20080508/a3775481/attachment.pgp>

More information about the xorg mailing list