On Mit, 2010-09-29 at 11:49 +0100, Keith Whitwell wrote: > On Wed, 2010-09-29 at 03:35 -0700, Michel Dänzer wrote: > > On Die, 2010-09-28 at 11:40 -0400, Jerome Glisse wrote: > > > > > > - use score for placing bo, bo placement will be recorded in bo structure > > > and > > > each time a state is bind bo score will be updated (bo bound as > > > framebuffer > > > will get their score for placing into vram increase while bo bound as > > > small > > > vertex buffer will endup in GTT, also anytime a bo is mapped for transfer > > > for > > > CPU read its score for GTT placement increase thus bo that are often > > > updated > > > by CPU will more likely place into GTT) > > > > Beware that the EXA 'classic' scheme originally (with the 'greedy' and > > 'smart' heuristics) used a score like that to determine whether a pixmap > > should reside in VRAM or system memory, and it could result in quite > > erratic / inconsistent / unreproducible behaviour when the score hovered > > around the threshold. It could make fixing or even reproducing problems > > harder than it is already. > > Did trying some sort of hysteresis - eg. having different thresholds for > upload vs. download help?
There actually already is a hysteresis — I forgot about that, thanks for reminding me. I never tried playing with the threshold values, don't know if anyone did. -- Earthling Michel Dänzer | http://www.vmware.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
