xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/radeon: track memory statistics about VRAM and GTT usage and buffer moves v2

Browse Source 
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>
This commit is contained in:
Marek Olšák
2014-03-02 00:56:18 +01:00
committed by Christian König
parent bda72d58a2
commit 67e8e3f970
6 changed files with 65 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/gpu/drm/radeon/radeon_kms.c
View File

@@ -486,6 +486,21 @@ static int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file
case RADEON_INFO_VCE_FB_VERSION:
*value = rdev->vce.fb_version;
break;
case RADEON_INFO_NUM_BYTES_MOVED:
value = (uint32_t*)&value64;
value_size = sizeof(uint64_t);
value64 = atomic64_read(&rdev->num_bytes_moved);
break;
case RADEON_INFO_VRAM_USAGE:
value = (uint32_t*)&value64;
value_size = sizeof(uint64_t);
value64 = atomic64_read(&rdev->vram_usage);
break;
case RADEON_INFO_GTT_USAGE:
value = (uint32_t*)&value64;
value_size = sizeof(uint64_t);
value64 = atomic64_read(&rdev->gtt_usage);
break;
default:
DRM_DEBUG_KMS("Invalid request %d\n", info->request);
return -EINVAL;