Improves performance in Talos by about 15% (and significant improvements
in RotR and possibly other but did not bench with final patch) on
kernel 4.19 and earlier.
On 4.20+ a similar effect comes from
433ca054949a "drm/amdgpu: try allocating VRAM as power of two"
v2: Do not impact the alignment of the physical memory.
Given the simplicity of the patch and the impact, CC to stable?
---
src/amd/vulkan/winsys/amdgpu/radv_amdgpu_bo.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/src/amd/vulkan/winsys/amdgpu/radv_amdgpu_bo.c
b/src/amd/vulkan/winsys/amdgpu/radv_amdgpu_bo.c
index 25764d93f6a..482cf0f6659 100644
--- a/src/amd/vulkan/winsys/amdgpu/radv_amdgpu_bo.c
+++ b/src/amd/vulkan/winsys/amdgpu/radv_amdgpu_bo.c
@@ -304,8 +304,12 @@ radv_amdgpu_winsys_bo_create(struct radeon_winsys *_ws,
return NULL;
}
+ unsigned virt_alignment = alignment;
+ if (size >= ws->info.pte_fragment_size)
+ virt_alignment = MAX2(virt_alignment,
ws->info.pte_fragment_size);
+
r = amdgpu_va_range_alloc(ws->dev, amdgpu_gpu_va_range_general,
- size, alignment, 0, &va, &va_handle,
+ size, virt_alignment, 0, &va, &va_handle,
(flags & RADEON_FLAG_32BIT ?
AMDGPU_VA_RANGE_32_BIT : 0) |
AMDGPU_VA_RANGE_HIGH);
if (r)
--
2.19.2
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