pyrox.dev
1{ config, lib, pkgs, ... }:
2
3with lib;
4
5let
6 cpupower = config.boot.kernelPackages.cpupower;
7 cfg = config.powerManagement;
8in
9
10{
11 ###### interface
12
13 options = {
14
15 powerManagement.cpuFreqGovernor = mkOption {
16 type = types.nullOr types.str;
17 default = null;
18 example = "ondemand";
19 description = ''
20 Configure the governor used to regulate the frequence of the
21 available CPUs. By default, the kernel configures the
22 performance governor.
23 '';
24 };
25
26 };
27
28
29 ###### implementation
30
31 config = mkIf (!config.boot.isContainer && config.powerManagement.cpuFreqGovernor != null) {
32
33 boot.kernelModules = [ "cpufreq_${cfg.cpuFreqGovernor}" ];
34
35 environment.systemPackages = [ cpupower ];
36
37 systemd.services.cpufreq = {
38 description = "CPU Frequency Governor Setup";
39 after = [ "systemd-modules-load.service" ];
40 wantedBy = [ "multi-user.target" ];
41 path = [ cpupower pkgs.kmod ];
42 unitConfig.ConditionVirtualization = false;
43 serviceConfig = {
44 Type = "oneshot";
45 RemainAfterExit = "yes";
46 ExecStart = "${cpupower}/bin/cpupower frequency-set -g ${cfg.cpuFreqGovernor}";
47 SuccessExitStatus = "0 237";
48 };
49 };
50
51 };
52}