Questions about Intel xorg driver

[Zhenyu Wang]

On 2008.01.30 17:46:16 -0800, Randolph Chung wrote:
> > 2) XvMC
> > Is XvMC supported on this setup? I haven't been able to tell
> > conclusively. I tried setting XvMCSurfaces to "6" in my xorg.conf, but
> > Xorg.0.log shows:
> > root at goofy:~# grep XvMC /var/log/Xorg.0.log
> > (WW) intel(0): Option "XvMCSurfaces" is not used
> 
> Using 2.2.0 driver + xorg 1.4.99.2, XvMC is enabled according to
> Xorg.0.log. Usin xine, I see something like:
> [intel_xvmc] info: decoder type is i915/945 MPEG2 MC decoder
> 
> so it looks like it's getting the right interface
> 
> However, I don't seem to notice any performance improvements. CPU usage
> for playing various MPEG video clips is similar between xvmc and just
> xv.
> 
> Again, is this expected?

Difference blocks are still memcpy-ed into buffers that allocated to
device, which is bad. Will see how to use new bufmgr to fix this.