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cpu-freq: Use cpupower instead of cpufrequtils

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Additionally, put the powersave utility in charge of loading the
cpufrequency modules based on the governor specified in the
configuration.
This commit is contained in:
William A. Kennington III 2014-03-17 18:07:46 -05:00 committed by Eelco Dolstra
parent 171a58bcd6
commit dd209e901c
2 changed files with 23 additions and 26 deletions
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6
nixos/modules/config/power-management.nix
View file

@ -65,11 +65,7 @@ in
config = mkIf cfg.enable {
boot.kernelModules =
[ "acpi_cpufreq" "powernow-k8" "cpufreq_performance" "cpufreq_powersave" "cpufreq_ondemand"
"cpufreq_conservative"
];
# FIXME: Implement powersave governor for sandy bridge or later Intel CPUs
powerManagement.cpuFreqGovernor = mkDefault "ondemand";
powerManagement.scsiLinkPolicy = mkDefault "min_power";

43
nixos/modules/tasks/cpu-freq.nix
View file

@ -2,6 +2,11 @@
with lib;
let
cpupower = config.boot.kernelPackages.cpupower;
cfg = config.powerManagement;
in
{
###### interface
@ -25,29 +30,25 @@ with lib;
config = mkIf (config.powerManagement.cpuFreqGovernor != null) {
environment.systemPackages = [ pkgs.cpufrequtils ];
boot.kernelModules = [ "acpi-cpufreq" "speedstep-lib" "pcc-cpufreq"
"cpufreq_${cfg.cpuFreqGovernor}"
];
jobs.cpufreq =
{ description = "CPU Frequency Governor Setup";
environment.systemPackages = [ cpupower ];
after = [ "systemd-modules-load.service" ];
wantedBy = [ "multi-user.target" ];
unitConfig.ConditionPathIsReadWrite = "/sys/devices/";
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
'';
systemd.services.cpufreq = {
description = "CPU Frequency Governor Setup";
after = [ "systemd-modules-load.service" ];
wantedBy = [ "multi-user.target" ];
path = [ cpupower ];
script = ''
cpupower frequency-set -g ${cfg.cpuFreqGovernor}
'';
serviceConfig = {
Type = "oneshot";
RemainAfterExit = "yes";
};
};
};
};
}