intel_gpu_frequency(1)      General Commands Manual     intel_gpu_frequency(1)

Name
       intel_gpu_frequency - Manipulate Intel GPU frequencies

SYNOPSIS
       intel_gpu_frequency [OPTIONS]

DESCRIPTION
       A program to manipulate Intel GPU frequencies. Intel GPUs will
       automatically throttle the frequencies based on system demands, up when
       needed, down when not. This tool should only be used for debugging
       performance problems, or trying to get a stable frequency while
       benchmarking.

       Intel GPUs only accept specific frequencies. The tool may, or may not
       attempt to adjust requests to the proper frequency if they aren't
       correct. This may lead to non-obvious failures when setting frequency.
       Multiples of 50MHz is usually a safe bet.

OPTIONS

       -e     Lock frequency to the most efficient frequency.

       -g, --get
              Get all the current frequency settings.

       -s FREQUENCY, --set=FREQUENCY
              Lock frequency to an absolute value (MHz).

       -c, --custom
              Set a min, or max frequency "min=X | max=Y".

       -m, --max
              Lock frequency to max frequency.

       -i, --min
              Lock frequency to min (never a good idea, DEBUG ONLY).

       -d, --defaults
              Return the system to hardware defaults.

       -h, --help
              Show help.

       -v, --version
              Show version.

EXAMPLES

       intel_gpu_frequency -gmin,cur
              Get the current and minimum frequency.

       intel_gpu_frequency -s 400
              Lock frequency to 400Mhz.

       intel_gpu_frequency -c max=750
              Set the max frequency to 750MHz

REPORTING BUGS
       Report bugs on fd.o GitLab: <https://gitlab.freedesktop.org/drm/igt-
       gpu-tools/-/issues>

Author
       IGT Developers <igt-dev@lists.freedesktop.org>

Copyright
       2015-2016 Intel Corporation

igt-gpu-tools 2.2                 2016-03-01            intel_gpu_frequency(1)