Am 06.07.2017 um 12:51 schrieb Michel Dänzer:
From: John Brooks <[email protected]>
There is no need for page faults to force BOs into visible VRAM if it's
full, and the time it takes to do so is great enough to cause noticeable
stuttering. Add GTT as a possible placement so that if visible VRAM is
full, page faults move BOs to GTT instead of evicting other BOs from VRAM.
Suggested-by: Michel Dänzer <[email protected]>
Signed-off-by: John Brooks <[email protected]>
Reviewed-by: Michel Dänzer <[email protected]>
Signed-off-by: Michel Dänzer <[email protected]>
Reviewed-by: Christian König <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 93601fbea695..6e24339ecc46 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -974,18 +974,21 @@ int amdgpu_bo_fault_reserve_notify(struct
ttm_buffer_object *bo)
/* hurrah the memory is not visible ! */
atomic64_inc(&adev->num_vram_cpu_page_faults);
- amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM);
+ amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
+ AMDGPU_GEM_DOMAIN_GTT);
+
+ /* Avoid costly evictions; only set GTT as a busy placement */
+ abo->placement.num_busy_placement = 1;
+ abo->placement.busy_placement = &abo->placements[1];
+
r = ttm_bo_validate(bo, &abo->placement, false, false);
- if (unlikely(r == -ENOMEM)) {
- amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT);
- return ttm_bo_validate(bo, &abo->placement, false, false);
- } else if (unlikely(r != 0)) {
+ if (unlikely(r != 0))
return r;
- }
offset = bo->mem.start << PAGE_SHIFT;
/* this should never happen */
- if ((offset + size) > adev->mc.visible_vram_size)
+ if (bo->mem.mem_type == TTM_PL_VRAM &&
+ (offset + size) > adev->mc.visible_vram_size)
return -EINVAL;
return 0;
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