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.h b/drivers/gpu/drm/radeon/radeon.h
index c20d88c..7bb8fd9 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -2309,6 +2309,10 @@
/* virtual memory */
struct radeon_vm_manager vm_manager;
struct mutex gpu_clock_mutex;
+ /* memory stats */
+ atomic64_t vram_usage;
+ atomic64_t gtt_usage;
+ atomic64_t num_bytes_moved;
/* ACPI interface */
struct radeon_atif atif;
struct radeon_atcs atcs;