1INTEL_GPU_FREQUENCY(1)      General Commands Manual     INTEL_GPU_FREQUENCY(1)
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NAME

6       intel_gpu_frequency - Manipulate Intel GPU frequencies
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SYNOPSIS

9       intel_gpu_frequency [OPTIONS]
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DESCRIPTION

12       A program to manipulate Intel GPU frequencies. Intel GPUs will automat‐
13       ically throttle the  frequencies  based  on  system  demands,  up  when
14       needed, down when not. This tool should only be used for debugging per‐
15       formance problems, or trying to get a stable frequency while benchmark‐
16       ing.
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18       Intel  GPUs  only accept specific frequencies. The tool may, or may not
19       attempt to adjust requests to the proper frequency if they aren't  cor‐
20       rect.  This  may  lead  to non-obvious failures when setting frequency.
21       Multiples of 50MHz is usually a safe bet.
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OPTIONS

24       -e     Lock frequency to the most efficient frequency.
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26       -g, --get
27              Get all the current frequency settings.
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29       -s FREQUENCY, --set=FREQUENCY
30              Lock frequency to an absolute value (MHz).
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32       -c, --custom
33              Set a min, or max frequency "min=X | max=Y".
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35       -m, --max
36              Lock frequency to max frequency.
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38       -i, --min
39              Lock frequency to min (never a good idea, DEBUG ONLY).
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41       -d, --defaults
42              Return the system to hardware defaults.
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44       -h, --help
45              Show help.
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47       -v, --version
48              Show version.
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EXAMPLES

51       intel_gpu_frequency -gmin,cur
52              Get the current and minimum frequency.
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54       intel_gpu_frequency -s 400
55              Lock frequency to 400Mhz.
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57       intel_gpu_frequency -c max=750
58              Set the max frequency to 750MHz
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REPORTING BUGS

61       Report bugs to https://bugs.freedesktop.org.
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AUTHOR

64       IGT Developers <igt-dev@lists.freedesktop.org>
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67       2015-2016 Intel Corporation
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72igt-gpu-tools 1.25                2016-03-01            INTEL_GPU_FREQUENCY(1)
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