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1.. SPDX-License-Identifier: GPL-2.0+2 3=========================4 drm/Panfrost Mali Driver5=========================6 7.. _panfrost-usage-stats:8 9Panfrost DRM client usage stats implementation10==============================================11 12The drm/Panfrost driver implements the DRM client usage stats specification as13documented in :ref:`drm-client-usage-stats`.14 15Example of the output showing the implemented key value pairs and entirety of16the currently possible format options:17 18::19 pos: 020 flags: 0240000221 mnt_id: 2722 ino: 53123 drm-driver: panfrost24 drm-client-id: 1425 drm-engine-fragment: 1846584880 ns26 drm-cycles-fragment: 142435940927 drm-maxfreq-fragment: 799999987 Hz28 drm-curfreq-fragment: 799999987 Hz29 drm-engine-vertex-tiler: 71932239 ns30 drm-cycles-vertex-tiler: 5261735731 drm-maxfreq-vertex-tiler: 799999987 Hz32 drm-curfreq-vertex-tiler: 799999987 Hz33 drm-total-memory: 290 MiB34 drm-shared-memory: 0 MiB35 drm-active-memory: 226 MiB36 drm-resident-memory: 36496 KiB37 drm-purgeable-memory: 128 KiB38 39Possible `drm-engine-` key names are: `fragment`, and `vertex-tiler`.40`drm-curfreq-` values convey the current operating frequency for that engine.41 42Users must bear in mind that engine and cycle sampling are disabled by default,43because of power saving concerns. `fdinfo` users and benchmark applications which44query the fdinfo file must make sure to toggle the job profiling status of the45driver by writing into the appropriate sysfs node::46 47 echo <N> > /sys/bus/platform/drivers/panfrost/[a-f0-9]*.gpu/profiling48 49Where `N` is either `0` or `1`, depending on the desired enablement status.50