diff options
Diffstat (limited to 'nixos/modules/tasks/cpu-freq.nix')
-rw-r--r-- | nixos/modules/tasks/cpu-freq.nix | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/nixos/modules/tasks/cpu-freq.nix b/nixos/modules/tasks/cpu-freq.nix new file mode 100644 index 000000000000..ce36a8bab096 --- /dev/null +++ b/nixos/modules/tasks/cpu-freq.nix @@ -0,0 +1,51 @@ +{ config, pkgs, ... }: + +with pkgs.lib; + +{ + ###### interface + + options = { + + powerManagement.cpuFreqGovernor = mkOption { + type = types.nullOr types.str; + default = null; + example = "ondemand"; + 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 != null) { + + 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 + ''; + }; + }; + +} |