CPU and GPU cache-coherence

[Michel Dänzer]

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