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cpufreq: Don't complain if a CPU doesn't support the desired governor

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This commit is contained in:
Eelco Dolstra 2012-08-23 12:12:25 -04:00
parent 4c65a5d95c
commit e194d41b9c
1 changed files with 12 additions and 4 deletions
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16
modules/tasks/cpu-freq.nix
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@ -6,7 +6,7 @@ with pkgs.lib;
###### interface
options = {
powerManagement.cpuFreqGovernor = mkOption {
default = "";
example = "ondemand";
@ -17,7 +17,7 @@ with pkgs.lib;
"userspace".
'';
};
};
@ -30,11 +30,19 @@ with pkgs.lib;
jobs.cpufreq =
{ description = "Initialize CPU frequency governor";
startOn = "started udev";
after = [ "systemd-modules-load.service" ];
wantedBy = [ "multi-user.target" ];
path = [ pkgs.cpufrequtils ];
preStart = ''
for i in $(seq 0 $(($(nproc) - 1))); do
${pkgs.cpufrequtils}/bin/cpufreq-set -g ${config.powerManagement.cpuFreqGovernor} -c $i
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
'';
};