cpu-scaling.md

You can scale the cpu frequency down to preserve power:

cpupower command

System Info

Get information about cpus with this:

$ sudo cpupower -c all frequency-info

Important information to note:

...
  hardware limits: 400 MHz - 4.60 GHz
  available cpufreq governors: performance powersave
  current CPU frequency: 4.13 GHz (asserted by call to kernel)
...

We then will use the following environment variables for the commands below:

HIGH=4.60GHz
LOW=400MHz

max performance, no power saving, any cpu frequency

sudo cpupower frequency-set -g performance
sudo cpupower frequency-set -u $HIGH
sudo cpupower frequency-set -d $LOW

normal performance, uses power saving, any cpu frequency

sudo cpupower frequency-set -g powersave
sudo cpupower frequency-set -u $HIGH
sudo cpupower frequency-set -d $LOW

low performance, uses power saving, only low cpu frequency

sudo cpupower frequency-set -g powersave
sudo cpupower frequency-set -u $LOW
sudo cpupower frequency-set -d $LOW