kernel/linux.git/Documentation/gpu/drm-usage-stats.rst, branch linux-6.0.y

drm/msm: Expose client engine utilization via fdinfo

2022-07-05T03:01:11+00:00

Similar to AMD commit 874442541133 ("drm/amdgpu: Add show_fdinfo() interface"), using the infrastructure added in previous patches, we add basic client info and GPU engine utilisation for msm. Example output: # cat /proc/`pgrep glmark2`/fdinfo/6 pos: 0 flags: 02400002 mnt_id: 21 ino: 162 drm-driver: msm drm-client-id: 7 drm-engine-gpu: 1734371319 ns drm-cycles-gpu: 1153645024 drm-maxfreq-gpu: 800000000 Hz See also: https://patchwork.freedesktop.org/patch/468505/ v2: Add dev-maxfreq-$engine and update drm-usage-stats.rst v3: spelling and compiler warning Signed-off-by: Rob Clark Reviewed-by: Dmitry Baryshkov Acked-by: Tvrtko Ursulin Patchwork: https://patchwork.freedesktop.org/patch/488906/ Link: https://lore.kernel.org/r/20220609174213.2265938-2-robdclark@gmail.com Signed-off-by: Dmitry Baryshkov

drm/i915: Expose client engine utilisation via fdinfo

2022-04-05T07:40:57+00:00

Similar to AMD commit 874442541133 ("drm/amdgpu: Add show_fdinfo() interface"), using the infrastructure added in previous patches, we add basic client info and GPU engine utilisation for i915. Example of the output: pos: 0 flags: 0100002 mnt_id: 21 drm-driver: i915 drm-pdev: 0000:00:02.0 drm-client-id: 7 drm-engine-render: 9288864723 ns drm-engine-copy: 2035071108 ns drm-engine-video: 0 ns drm-engine-video-enhance: 0 ns v2: * Update for removal of name and pid. v3: * Use drm_driver.name. v4: * Added drm-engine-capacity- tag. * Fix typo. (Umesh) v5: * Don't output engine data before Gen8. Signed-off-by: Tvrtko Ursulin Cc: David M Nieto Cc: Christian König Cc: Daniel Vetter Cc: Chris Healy Acked-by: Christian König Reviewed-by: Umesh Nerlige Ramappa Acked-by: Rob Clark Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20220401142205.3123159-9-tvrtko.ursulin@linux.intel.com

drm: Document fdinfo format specification

2022-04-05T07:39:15+00:00

Proposal to standardise the fdinfo text format as optionally output by DRM drivers. Idea is that a simple but, well defined, spec will enable generic userspace tools to be written while at the same time avoiding a more heavy handed approach of adding a mid-layer to DRM. i915 implements a subset of the spec, everything apart from the memory stats currently, and a matching intel_gpu_top tool exists. Open is to see if AMD can migrate to using the proposed GPU utilisation key-value pairs, or if they are not workable to see whether to go vendor specific, or if a standardised alternative can be found which is workable for both drivers. Same for the memory utilisation key-value pairs proposal. v2: * Update for removal of name and pid. v3: * 'Drm-driver' tag will be obtained from struct drm_driver.name. (Daniel) v4: * Added drm-engine-capacity- tag. Signed-off-by: Tvrtko Ursulin Cc: David M Nieto Cc: Christian König Cc: Daniel Vetter Cc: Daniel Stone Cc: Chris Healy Acked-by: Christian König Reviewed-by: Umesh Nerlige Ramappa Link: https://patchwork.freedesktop.org/patch/msgid/20220401142205.3123159-7-tvrtko.ursulin@linux.intel.com