[Intel-gfx] [intel-gfx][PATCH] intel: add a new interface drm_intel_bo_alloc_direct

[Daniel Vetter]

On Tue, May 25, 2010 at 01:06:50PM +0800, Xiang, Haihao wrote:
> This interface is the same as drm_intel_bo_alloc except the allocated
> size isn't rounded up, so it bypasses the cache bucket.
> 
> The size of the BO created by drm_intel_bo_alloc for a 1920x800,4:2:0 YUV
> planar surface is 4M, it is about 2.2M if using drm_intel_bo_alloc_direct.

Have you tried either Chris Wilson's or my fair-lru eviction patches? They
should help quite a lot, especially for many big objects of exactly the
same size like libva uses.

Cause even 2*23*4M = 184 should decently fit into a 256M aperture - which
is what I have here for my ilk machine. Dunno whether that 23 for the
number of reference framse is correct, but it's certainly an upper bound.

Yours, Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
M
bile: +41 (0)79 365 57 48