Xvideo performance on Radeon 7500 vs Intel 915

Michel Dänzer michel at tungstengraphics.com
Thu Dec 14 09:00:20 PST 2006

On Thu, 2006-12-14 at 11:52 -0500, Ken Mandelberg wrote:
> After the failure, the driver tries
> xf86QueryLargestOffscreenLinear(pScreen, &max_size, 16,
>                                              PRIORITY_EXTREME);
> and max_size comes back 1,479,808 which is too small.
> So I guess myth is using enough of the "OffscreenLinear" in the GUI to 
> leave not enough left for the actual video.
> I've turned off myth's preview mpg imaging, and its not apparent to me 
> where the qt myth interface is using the resource. It doesn't show up in 
> the alloc points I'm catching in radeon_video.c.

The only offscreen memory usage that I know of that can't be overridden
by the driver Xv code is for GLX renderbuffers and textures. Try
reducing the amount reserved for textures with Option "FBTexPercent".

Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer

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