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intel: Be more conservative in disabling tiling to save memory. 

Improves GLB2.7 trex performance 1.01985% +/- 0.721366% on my IVB (n=10)
and by 3.38771% +/- 0.584241% (n=15) on my HSW, due to a 32x32 ARGB8888
cubemap going from untiled to tiled.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Eric Anholt 2013-04-25 14:41:36 -07:00
parent 73bc6061f5
commit de7e8b1d01
1 changed files with 5 additions and 3 deletions
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8
src/mesa/drivers/dri/intel/intel_mipmap_tree.c
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@ -346,11 +346,13 @@ intel_miptree_choose_tiling(struct intel_context *intel,
base_format == GL_DEPTH_STENCIL_EXT))
return I915_TILING_Y;
/* If the width is smaller than a tile, don't bother tiling. */
if (width0 < 64)
int minimum_pitch = mt->total_width * mt->cpp;
/* If the width is much smaller than a tile, don't bother tiling. */
if (minimum_pitch < 64)
return I915_TILING_NONE;
if (ALIGN(mt->total_width * mt->cpp, 512) >= 32768) {
if (ALIGN(minimum_pitch, 512) >= 32768) {
perf_debug("%dx%d miptree too large to blit, falling back to untiled",
mt->total_width, mt->total_height);
return I915_TILING_NONE;