drm/radeon: track memory statistics about VRAM and GTT usage and buffer moves v2
The statistics are:
- VRAM usage in bytes
- GTT usage in bytes
- number of bytes moved by TTM
The last one is actually a counter, so you need to sample it before and after
command submission and take the difference.
This is useful for finding performance bottlenecks. Userspace queries are
also added.
v2: use atomic64_t
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index dd12bb4..282d6a2 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -56,11 +56,36 @@
}
}
+static void radeon_update_memory_usage(struct radeon_bo *bo,
+ unsigned mem_type, int sign)
+{
+ struct radeon_device *rdev = bo->rdev;
+ u64 size = (u64)bo->tbo.num_pages << PAGE_SHIFT;
+
+ switch (mem_type) {
+ case TTM_PL_TT:
+ if (sign > 0)
+ atomic64_add(size, &rdev->gtt_usage);
+ else
+ atomic64_sub(size, &rdev->gtt_usage);
+ break;
+ case TTM_PL_VRAM:
+ if (sign > 0)
+ atomic64_add(size, &rdev->vram_usage);
+ else
+ atomic64_sub(size, &rdev->vram_usage);
+ break;
+ }
+}
+
static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo)
{
struct radeon_bo *bo;
bo = container_of(tbo, struct radeon_bo, tbo);
+
+ radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1);
+
mutex_lock(&bo->rdev->gem.mutex);
list_del_init(&bo->list);
mutex_unlock(&bo->rdev->gem.mutex);
@@ -567,14 +592,23 @@
}
void radeon_bo_move_notify(struct ttm_buffer_object *bo,
- struct ttm_mem_reg *mem)
+ struct ttm_mem_reg *new_mem)
{
struct radeon_bo *rbo;
+
if (!radeon_ttm_bo_is_radeon_bo(bo))
return;
+
rbo = container_of(bo, struct radeon_bo, tbo);
radeon_bo_check_tiling(rbo, 0, 1);
radeon_vm_bo_invalidate(rbo->rdev, rbo);
+
+ /* update statistics */
+ if (!new_mem)
+ return;
+
+ radeon_update_memory_usage(rbo, bo->mem.mem_type, -1);
+ radeon_update_memory_usage(rbo, new_mem->mem_type, 1);
}
int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo)