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 to https://bugs.freedesktop.org.

AUTHOR

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

COPYRIGHT

2015-2016 Intel Corporation

2016-03-01

igt-gpu-tools 1.25