Am 2022-07-25 um 13:14 schrieb Daniel Phillips:
Rounding up allocations in the allocation path caused test regressions,
so now just round in the availability path.
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 043a808c88a3..014a594899fb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -40,10 +40,10 @@
#define AMDGPU_USERPTR_RESTORE_DELAY_MS 1
/*
- * Align VRAM allocations to 2MB to avoid fragmentation caused by 4K allocations in the tail 2MB
+ * Align VRAM availability to 2MB to avoid fragmentation caused by 4K allocations in the tail 2MB
* BO chunk
*/
-#define VRAM_ALLOCATION_ALIGN (1 << 21)
+#define VRAM_AVAILABLITY_ALIGN (1 << 21)
/* Impose limit on how much memory KFD can use */
static struct {
@@ -149,7 +149,7 @@ static int amdgpu_amdkfd_reserve_mem_limit(struct amdgpu_device *adev,
* to avoid fragmentation caused by 4K allocations in the tail
* 2M BO chunk.
*/
- vram_needed = ALIGN(size, VRAM_ALLOCATION_ALIGN);
+ vram_needed = size;
} else if (alloc_flag & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
system_mem_needed = size;
} else if (!(alloc_flag &
@@ -198,7 +198,7 @@ static void unreserve_mem_limit(struct amdgpu_device *adev,
kfd_mem_limit.system_mem_used -= size;
kfd_mem_limit.ttm_mem_used -= size;
} else if (alloc_flag & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) {
- adev->kfd.vram_used -= ALIGN(size, VRAM_ALLOCATION_ALIGN);
+ adev->kfd.vram_used -= size;
To calculate the available size taking potential fragmentation into
account, we still need to track the aligned VRAM usage somewhere (say
adev->kfd.vram_used_aligned), and use that in
amdgpu_amdkfd_get_available_memory instead of adev->kfd.vram_used.
Regards,
Felix
} else if (alloc_flag & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
kfd_mem_limit.system_mem_used -= size;
} else if (!(alloc_flag &
@@ -1642,7 +1642,6 @@ size_t amdgpu_amdkfd_get_available_memory(struct amdgpu_device *adev)
uint64_t reserved_for_pt =
ESTIMATE_PT_SIZE(amdgpu_amdkfd_total_mem_size);
size_t available;
-
spin_lock(&kfd_mem_limit.mem_limit_lock);
available = adev->gmc.real_vram_size
- adev->kfd.vram_used
@@ -1650,7 +1649,7 @@ size_t amdgpu_amdkfd_get_available_memory(struct amdgpu_device *adev)
- reserved_for_pt;
spin_unlock(&kfd_mem_limit.mem_limit_lock);
- return ALIGN_DOWN(available, VRAM_ALLOCATION_ALIGN);
+ return ALIGN_DOWN(available, VRAM_AVAILABLITY_ALIGN);
}
int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
