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cpufreq

The sysfs interface to cpu frequency settings and current state.

/sys/devices/system/cpu/cpu*/cpufreq/

cpupower(1)

A CLI interface to peek and poke the cpu frequency settings.

# Show current frequency of all cores. cpupower -c all frequency-info -f -m # Show currently set frequency governor. cpupower -c all frequency-info -p # List available frequency governors. cpupower -c all frequency-info -g # Change frequency governor to POWERSAVE (eg). cpupower -c all frequency-set -g powersave

Example

Watch cpu frequency.

watch -n1 "cpupower -c all frequency-info -f -m | xargs -n2 -d'\n'"