{ config, pkgs, ... }: with pkgs.lib; { ###### interface options = { powerManagement.cpuFreqGovernor = mkOption { default = ""; example = "ondemand"; type = types.str; description = '' Configure the governor used to regulate the frequence of the available CPUs. By default, the kernel configures the on-demand governor. ''; }; }; ###### implementation config = mkIf (config.powerManagement.cpuFreqGovernor != "") { environment.systemPackages = [ pkgs.cpufrequtils ]; jobs.cpufreq = { description = "CPU Frequency Governor Setup"; after = [ "systemd-modules-load.service" ]; wantedBy = [ "multi-user.target" ]; path = [ pkgs.cpufrequtils ]; preStart = '' for i in $(seq 0 $(($(nproc) - 1))); do for gov in $(cpufreq-info -c $i -g); do if [ "$gov" = ${config.powerManagement.cpuFreqGovernor} ]; then echo "<6>setting governor on CPU $i to ‘$gov’" cpufreq-set -c $i -g $gov fi done done ''; }; }; }