1 .. SPDX-License-Identifier: GPL-2.0+ 2 3 ========================= 4 drm/Panfrost Mali Driver 5 ========================= 6 7 .. _panfrost-usage-stats: 8 9 Panfrost DRM client usage stats implementation 10 ============================================== 11 12 The drm/Panfrost driver implements the DRM client usage stats specification as 13 documented in :ref:`drm-client-usage-stats`. 14 15 Example of the output showing the implemented key value pairs and entirety of 16 the currently possible format options: 17 18 :: 19 pos: 0 20 flags: 02400002 21 mnt_id: 27 22 ino: 531 23 drm-driver: panfrost 24 drm-client-id: 14 25 drm-engine-fragment: 1846584880 ns 26 drm-cycles-fragment: 1424359409 27 drm-maxfreq-fragment: 799999987 Hz 28 drm-curfreq-fragment: 799999987 Hz 29 drm-engine-vertex-tiler: 71932239 ns 30 drm-cycles-vertex-tiler: 52617357 31 drm-maxfreq-vertex-tiler: 799999987 Hz 32 drm-curfreq-vertex-tiler: 799999987 Hz 33 drm-total-memory: 290 MiB 34 drm-shared-memory: 0 MiB 35 drm-active-memory: 226 MiB 36 drm-resident-memory: 36496 KiB 37 drm-purgeable-memory: 128 KiB 38 39 Possible `drm-engine-` key names are: `fragment`, and `vertex-tiler`. 40 `drm-curfreq-` values convey the current operating frequency for that engine. 41 42 Users must bear in mind that engine and cycle sampling are disabled by default, 43 because of power saving concerns. `fdinfo` users and benchmark applications which 44 query the fdinfo file must make sure to toggle the job profiling status of the 45 driver by writing into the appropriate sysfs node:: 46 47 echo <N> > /sys/bus/platform/drivers/panfrost/[a-f0-9]*.gpu/profiling 48 49 Where `N` is either `0` or `1`, depending on the desired enablement status.
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