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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.gamemode;
settingsFormat = pkgs.formats.ini { };
configFile = settingsFormat.generate "gamemode.ini" cfg.settings;
in
{
options = {
programs.gamemode = {
enable = mkEnableOption "GameMode to optimise system performance on demand";
enableRenice = mkEnableOption "CAP_SYS_NICE on gamemoded to support lowering process niceness" // {
default = true;
};
settings = mkOption {
type = settingsFormat.type;
default = {};
description = ''
System-wide configuration for GameMode (/etc/gamemode.ini).
See gamemoded(8) man page for available settings.
'';
example = literalExpression ''
{
general = {
renice = 10;
};
# Warning: GPU optimisations have the potential to damage hardware
gpu = {
apply_gpu_optimisations = "accept-responsibility";
gpu_device = 0;
amd_performance_level = "high";
};
custom = {
start = "''${pkgs.libnotify}/bin/notify-send 'GameMode started'";
end = "''${pkgs.libnotify}/bin/notify-send 'GameMode ended'";
};
}
'';
};
};
};
config = mkIf cfg.enable {
environment = {
systemPackages = [ pkgs.gamemode ];
etc."gamemode.ini".source = configFile;
};
security = {
polkit.enable = true;
wrappers = mkIf cfg.enableRenice {
gamemoded = {
owner = "root";
group = "root";
source = "${pkgs.gamemode}/bin/gamemoded";
capabilities = "cap_sys_nice+ep";
};
};
};
systemd = {
packages = [ pkgs.gamemode ];
user.services.gamemoded = {
# The upstream service already defines this, but doesn't get applied.
# See https://github.com/NixOS/nixpkgs/issues/81138
wantedBy = [ "default.target" ];
# Use pkexec from the security wrappers to allow users to
# run libexec/cpugovctl & libexec/gpuclockctl as root with
# the the actions defined in share/polkit-1/actions.
#
# This uses a link farm to make sure other wrapped executables
# aren't included in PATH.
environment.PATH = mkForce (pkgs.linkFarm "pkexec" [
{
name = "pkexec";
path = "${config.security.wrapperDir}/pkexec";
}
]);
serviceConfig.ExecStart = mkIf cfg.enableRenice [
"" # Tell systemd to clear the existing ExecStart list, to prevent appending to it.
"${config.security.wrapperDir}/gamemoded"
];
};
};
};
meta = {
maintainers = with maintainers; [ kira-bruneau ];
};
}
|