[Mesa-dev] [PATCH] winsys/amdgpu: Restrict allocation to GTT for small vram size

[Agrawal, Akshu]

To avoid evictions, use GTT only for allocation on devices with
small vram size.

Signed-off-by: Akshu Agrawal <akshu.agrawal at amd.com>
---
 src/gallium/winsys/amdgpu/drm/amdgpu_bo.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
index 09cf9247755..aab801b6337 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
@@ -486,8 +486,15 @@ static struct amdgpu_winsys_bo *amdgpu_create_bo(struct amdgpu_winsys *ws,
        * shared with the OS, allow VRAM placements too. The idea is not to use
        * VRAM usefully, but to use it so that it's not unused and wasted.
        */
-      if (!ws->info.has_dedicated_vram)
+   if (!ws->info.has_dedicated_vram) {
+      /* For devices having small VRAM size use GTT only to
+       * avoid evictions.
+       */
+      if (ws->info.vram_size <= 16777216)
+         request.preferred_heap = AMDGPU_GEM_DOMAIN_GTT;
+      else
          request.preferred_heap |= AMDGPU_GEM_DOMAIN_GTT;
+      }
    }
 
    if (initial_domain & RADEON_DOMAIN_GTT)
-- 
2.19.1