CPU and GPU cache-coherence
Michel Dänzer
michel at daenzer.net
Wed Jun 15 08:22:44 PDT 2011
On Mit, 2011-06-15 at 16:58 +0200, Michel Dänzer wrote:
> On Die, 2011-06-07 at 21:42 +0800, Donnie Fang wrote:
> > 3D render image on WC AGP aperture BO and then CPU fetch the image
> > from this bo, in order to achieve performance, after 3D finished
> > rendering, validate this bo into cached system memory and then read it
> > from system memory. But I always get garbage from there.
> > After check TTM bo validate codes, it has dealt with cache coherence
> > properly, i wonder whether there is something I misunderstand or it is
> > not allowed to move the WC bo from AGP to system memory for reading?
>
> Can you post patches showing what you've tried?
Moving to the new dri-devel list at freedesktop.org, please only follow
up there.
--
Earthling Michel Dänzer | http://www.vmware.com
Libre software enthusiast | Debian, X and DRI developer
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