On Don, 2012-11-29 at 10:18 +0100, Thomas Hellstrom wrote:
On 11/28/2012 10:51 PM, Marek Olšák wrote:
I think the problem with Radeon/TTM is much deeper. Let me demonstrate it on the following example.
Unigine Heaven needs about 385MB of space for static resources, that's only 75% of my 512MB card. Yet, TTM is not capable of getting all of that into VRAM. If I allow GTT placements, I get 20 fps, which is the old Mesa behavior. If I force VRAM placements, I get 3 fps, because we validate buffers 10 times per frame and there's probably a lot of buffer evictions during each validation.
Marek, Did you look at the total amount of referenced buffers in the ring including vertex buffers?
Depending on how hard you throttle, I guess vertex / index buffer data referenced by the ring commands may well exceed the VRAM limitation.
I think another reason 100% is not possible is fragmentation. Has anyone ever thought about defragmentation?