Você pode usar o regulador ondemand
cpu-freq, desde que você defina o parâmetro ignore_nice_load
como 1.
De Documentation/cpu-freq/governors.txt
, ondemand
seção:
ignore_nice_load: this parameter takes a value of '0' or '1'. When set to '0' (its default), all processes are counted towards the 'cpu utilisation' value. When set to '1', the processes that are run with a 'nice' value will not count (and thus be ignored) in the overall usage calculation. This is useful if you are running a CPU intensive calculation on your laptop that you do not care how long it takes to complete as you can 'nice' it and prevent it from taking part in the deciding process of whether to increase your CPU frequency.