diff options
| author | Marek Olšák <marek.olsak@amd.com> | 2021-01-23 21:53:30 -0500 |
|---|---|---|
| committer | Marge Bot <eric+marge@anholt.net> | 2021-02-03 21:53:34 +0000 |
| commit | e97af11ba95f2563579414c4c68f2cbd5af4928b (patch) | |
| tree | 83e57f77bdc4678e5b7be948e56223d3fa0f6799 /src/gallium/winsys/amdgpu/drm/amdgpu_bo.h | |
| parent | 35005881bf969c934c57d5dffb76ad1a8efa2310 (diff) | |
winsys/amdgpu,pb_slab: add slabs with 3/4 of power of two sizes to save memory
Instead of aligning slab allocations to powers of two (e.g. 129K -> 256K),
implement slab allocations with 3/4 of power of two sizes to reduce
overallocation. (e.g. 129K -> 192K)
The limitation is that the alignment must be 1/3rd of the allocation size.
DeusExMD allocates 2.1 GB of VRAM. Without this, slabs waste 194 MB due
to alignment, i.e. 9.2%. This commit reduces the waste to 102 MB, i.e. 4.9%.
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8683>
Diffstat (limited to 'src/gallium/winsys/amdgpu/drm/amdgpu_bo.h')
| -rw-r--r-- | src/gallium/winsys/amdgpu/drm/amdgpu_bo.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.h b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.h index d33c141e90f..c9b1cb6a517 100644 --- a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.h +++ b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.h @@ -115,6 +115,7 @@ struct amdgpu_winsys_bo { struct amdgpu_slab { struct pb_slab base; + unsigned entry_size; struct amdgpu_winsys_bo *buffer; struct amdgpu_winsys_bo *entries; }; |