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radv: do not allocate CMASK or DCC for small surfaces

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The idea is ported from RadeonSI, but using 512x512 instead of
256x256 seems slightly better. This improves dota2 performance
by +2%.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
This commit is contained in:
Samuel Pitoiset
2017-11-29 14:48:32 +01:00
parent f5955c6bf8
commit ff0f17da14
1 changed files with 10 additions and 0 deletions
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10
src/amd/vulkan/radv_image.c
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@@ -806,6 +806,16 @@ radv_image_alloc_htile(struct radv_image *image)
static inline bool
radv_image_can_enable_dcc_or_cmask(struct radv_image *image)
{
if (image->info.samples <= 1 &&
image->info.width <= 512 && image->info.height <= 512) {
/* Do not enable CMASK or DCC for small surfaces where the cost
* of the eliminate pass can be higher than the benefit of fast
* clear. RadeonSI does this, but the image threshold is
* different.
*/
return false;
}
return image->usage & VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT &&
(image->exclusive || image->queue_family_mask == 1);
}