Add script to manage Intel GPU frequencies.
It can be used for debugging performance problems or to lock a stable
frequency while executing benchmark tests.
Typical use cases:
- Get all available GPU frequency information
$ ./intel-gpu-freq.sh -g all
* Hardware capabilities
RP0: 1350 MHz
RPn: 100 MHz
RP1: 400 MHz
* Enforcements
max: 1350 MHz
min: 100 MHz
boost: 1350 MHz
* Actual
act: 100 MHz
cur: 400 MHz
- Lock frequency to 80% of the maximum allowed by hardware and enable
throttling detection
$ ./intel-gpu-freq.sh -s 80% -d
GPU throttling detected: act=1050 min=1350 cur=1350 RPn=100
GPU throttling detected: act=1100 min=1350 cur=1350 RPn=100
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Acked-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15662>
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