On 3/30/26 19:30, Ian Rogers wrote:
On Wed, Mar 25, 2026 at 11:47 AM Lizhi Hou <[email protected]> wrote:
Applied to drm-misc-next.
On 3/24/26 10:01, Mario Limonciello wrote:
On 3/24/26 11:31, Lizhi Hou wrote:
From: Max Zhen <[email protected]>
Add support for querying per-process buffer object (BO) memory
usage through the amdxdna GET_ARRAY UAPI.
Introduce a new query type, DRM_AMDXDNA_BO_USAGE, along with
struct amdxdna_drm_bo_usage to report BO memory usage statistics,
including heap, total, and internal usage.
Track BO memory usage on a per-client basis by maintaining counters
in GEM open/close and heap allocation/free paths. This ensures the
reported statistics reflect the current memory footprint of each
process.
Wire the new query into the GET_ARRAY implementation to expose
the usage information to userspace.
Signed-off-by: Max Zhen <[email protected]>
Reviewed-by: Lizhi Hou <[email protected]>
Signed-off-by: Lizhi Hou <[email protected]>
I'm assuming you also have userspace side ready for this too right?
If you have a link handy can you please include it when committing.
Sorry for a naive question, would support in procfs be possible?
Do you mean fdinfo? And yes, the fdinfo is in our upstream stack. I will
post the patch later.
Lizhi
There's support in perf for displaying DRM usage stat data from there
[1], for example:
```
$ perf list drm-
List of pre-defined events (to be used in -e or -M):
drm:
drm-active-stolen-system0
[Total memory active in one or more engines. Unit: drm_i915]
drm-active-system0
[Total memory active in one or more engines. Unit: drm_i915]
drm-engine-capacity-video
[Engine capacity. Unit: drm_i915]
drm-engine-copy
[Utilization in ns. Unit: drm_i915]
drm-engine-render
[Utilization in ns. Unit: drm_i915]
drm-engine-video
[Utilization in ns. Unit: drm_i915]
drm-engine-video-enhance
[Utilization in ns. Unit: drm_i915]
drm-purgeable-stolen-system0
[Size of resident and purgeable memory buffers. Unit: drm_i915]
drm-purgeable-system0
[Size of resident and purgeable memory buffers. Unit: drm_i915]
drm-resident-stolen-system0
[Size of resident memory buffers. Unit: drm_i915]
drm-resident-system0
[Size of resident memory buffers. Unit: drm_i915]
drm-shared-stolen-system0
[Size of shared memory buffers. Unit: drm_i915]
drm-shared-system0
[Size of shared memory buffers. Unit: drm_i915]
drm-total-stolen-system0
[Size of shared and private memory. Unit: drm_i915]
drm-total-system0
[Size of shared and private memory. Unit: drm_i915]
$ perf stat -e drm-engine-render -a sleep 1
Performance counter stats for 'system wide':
557,542,732,344 ns drm-engine-render
1.001575975 seconds time elapsed
```
Thanks,
Ian
[1] https://lore.kernel.org/lkml/[email protected]/
