forked from mirrors/nixpkgs
52 lines
1.1 KiB
Nix
52 lines
1.1 KiB
Nix
{ config, pkgs, ... }:
|
||
|
||
with pkgs.lib;
|
||
|
||
{
|
||
###### interface
|
||
|
||
options = {
|
||
|
||
powerManagement.cpuFreqGovernor = mkOption {
|
||
default = "";
|
||
example = "ondemand";
|
||
type = types.uniq types.string;
|
||
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 = "Initialize CPU frequency governor";
|
||
|
||
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
|
||
'';
|
||
};
|
||
};
|
||
|
||
}
|