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