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