EXA Migration

[Michel Dänzer]

On Fri, 2008-07-04 at 16:20 +0200, Lukas Hejtmanek wrote:
> On Tue, Jul 01, 2008 at 05:42:51PM +0200, Michel Dänzer wrote:
> > No straightforward way I'm afraid[0]. It sounds like what you'd want is
> > a variation of "always" which doesn't move pixmaps out of video RAM for
> > fallbacks, which should be easy to add.
> 
> wouldn't this be a benefit for the shared graphics? I think (but may be wrong)
> that CPU is equally fast accessing the shared memory and accessing the system
> memory thus migration from vram to ram is just wasting time? 

No, traditionally, CPU access to memory that is also accessible to the
GPU is uncached. TTM/GEM have fairly complicated schemes to avoid this,
but in that case the EXA migration code won't be active anyway.

That said, feel free to try it and let us know how it fares...


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