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cpupower: add page (#8073)
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# cpupower
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> Tools regarding CPU power and tuning options.
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> This command is available as part of the `cpupower` package, or as part of `kernel-tools` on Fedora.
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> More information: <https://manned.org/cpupower>.
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- List CPUs:
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`sudo cpupower --cpu {{all}} info`
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- Print information about all cores:
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`sudo cpupower --cpu {{all}} info`
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- Set all CPUs to a power-saving frequency governor:
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`sudo cpupower --cpu {{all}} frequency-set --governor {{powersave}}`
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- Print CPU 0's available frequency [g]overnors:
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`sudo cpupower --cpu {{0}} frequency-info g | grep "analyzing\|governors"`
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- Print CPU 4's frequency from the hardware, in a human-readable format:
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`sudo cpupower --cpu {{4}} frequency-info --hwfreq --human`
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