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Revert "winsys/amdgpu: overallocate buffers for faster address translation on Gfx9"

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I didn't mean to push this. I don't think it makes any difference.

This reverts commit f737fe00a0.
This commit is contained in:
Marek Olšák 2018-11-29 14:45:42 -05:00
parent fbf95ce074
commit 39b20b7d4f
1 changed files with 0 additions and 24 deletions
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24
src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
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@ -466,30 +466,6 @@ static struct amdgpu_winsys_bo *amdgpu_create_bo(struct amdgpu_winsys *ws,
RADEON_DOMAIN_GDS |
RADEON_DOMAIN_OA)) == 1);
/* Gfx9: Overallocate the size to the next power of two for faster address
* translation if we don't waste too much memory.
*/
if (ws->info.chip_class >= GFX9) {
uint64_t next_pot_size = util_next_power_of_two64(size);
/* For slightly lower than 4 GB allocations, at most 32 MB are wasted.
* For slightly lower than 256 MB allocations, at most 2 MB are wasted.
* For slightly lower than 64 MB allocations, at most 512 KB are wasted.
*
* Waste at most 0.79% (1/127) of the size if we decide to overallocate.
*/
uint64_t max_overalloc = next_pot_size >> 7;
/* If the next power-of-two size is <= the page size, waste up to
* 6.25% (1/16) of the size if we decide to overallocate.
*/
if (next_pot_size <= ws->info.pte_fragment_size)
max_overalloc = next_pot_size >> 4;
if (size + max_overalloc >= next_pot_size)
size = next_pot_size;
}
bo = CALLOC_STRUCT(amdgpu_winsys_bo);
if (!bo) {
return NULL;