commit 4142020e459b52658fd56714f50cf4ccc56d66e4 · pyrox.dev/nixpkgs

nixos/modules/module-list.nix

···

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         ./services/hardware/upower.nix

     

       282
        
         ./services/hardware/usbmuxd.nix

     

       283
        
         ./services/hardware/thermald.nix

     

       0
        
       
     

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         ./services/logging/SystemdJournal2Gelf.nix

     

       285
        
         ./services/logging/awstats.nix

     

       286
        
         ./services/logging/fluentd.nix

···

       281
        
         ./services/hardware/upower.nix

     

       282
        
         ./services/hardware/usbmuxd.nix

     

       283
        
         ./services/hardware/thermald.nix

     

       284
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         ./services/hardware/undervolt.nix

     

       285
        
         ./services/logging/SystemdJournal2Gelf.nix

     

       286
        
         ./services/logging/awstats.nix

     

       287
        
         ./services/logging/fluentd.nix

+134

nixos/modules/services/hardware/undervolt.nix

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       { config, pkgs, lib, ... }:

     

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       with lib;

     

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       let

     

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         cfg = config.services.undervolt;

     

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       in {

     

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         options.services.undervolt = {

     

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           enable = mkOption {

     

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             type = types.bool;

     

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             default = false;

     

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             description = ''

     

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               Whether to undervolt intel cpus.

     

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             '';

     

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           };

     

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           verbose = mkOption {

     

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             type = types.bool;

     

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             default = false;

     

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             description = ''

     

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               Whether to enable verbose logging.

     

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             '';

     

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           };

     

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           package = mkOption {

     

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             type = types.package;

     

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             default = pkgs.undervolt;

     

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             defaultText = "pkgs.undervolt";

     

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             description = ''

     

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               undervolt derivation to use.

     

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             '';

     

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           };

     

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           coreOffset = mkOption {

     

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             type = types.nullOr types.str;

     

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             default = null;

     

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             description = ''

     

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               The amount of voltage to offset the CPU cores by. Accepts a floating point number.

     

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             '';

     

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           };

     

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           gpuOffset = mkOption {

     

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             type = types.nullOr types.str;

     

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             default = null;

     

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             description = ''

     

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               The amount of voltage to offset the GPU by. Accepts a floating point number.

     

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             '';

     

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           };

     

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           uncoreOffset = mkOption {

     

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             type = types.nullOr types.str;

     

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             default = null;

     

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             description = ''

     

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               The amount of voltage to offset uncore by. Accepts a floating point number.

     

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             '';

     

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           };

     

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           analogioOffset = mkOption {

     

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             type = types.nullOr types.str;

     

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             default = null;

     

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             description = ''

     

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               The amount of voltage to offset analogio by. Accepts a floating point number.

     

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             '';

     

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           };

     

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           temp = mkOption {

     

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             type = types.nullOr types.str;

     

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             default = null;

     

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             description = ''

     

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               The temperature target. Accepts a floating point number.

     

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             '';

     

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           };

     

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           tempAc = mkOption {

     

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             type = types.nullOr types.str;

     

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             default = null;

     

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             description = ''

     

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               The temperature target on AC power. Accepts a floating point number.

     

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             '';

     

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           };

     

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           tempBat = mkOption {

     

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             type = types.nullOr types.str;

     

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             default = null;

     

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             description = ''

     

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               The temperature target on battery power. Accepts a floating point number.

     

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             '';

     

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           };

     

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         };

     

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         config = mkIf cfg.enable {

     

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           boot.kernelModules = [ "msr" ];

     

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           environment.systemPackages = [ cfg.package ];

     

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           systemd.services.undervolt = {

     

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             path = [ pkgs.undervolt ];

     

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             description = "Intel Undervolting Service";

     

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             serviceConfig = {

     

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               Type = "oneshot";

     

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               Restart = "no";

     

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               # `core` and `cache` are both intentionally set to `cfg.coreOffset` as according to the undervolt docs:

     

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               #

     

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               #     Core or Cache offsets have no effect. It is not possible to set different offsets for

     

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               #     CPU Core and Cache. The CPU will take the smaller of the two offsets, and apply that to

     

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               #     both CPU and Cache. A warning message will be displayed if you attempt to set different offsets.

     

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               ExecStart = ''

     

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                 ${pkgs.undervolt}/bin/undervolt \

     

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                   ${optionalString cfg.verbose "--verbose"} \

     

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                   ${optionalString (cfg.coreOffset != null) "--core ${cfg.coreOffset}"} \

     

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                   ${optionalString (cfg.coreOffset != null) "--cache ${cfg.coreOffset}"} \

     

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                   ${optionalString (cfg.gpuOffset != null) "--gpu ${cfg.gpuOffset}"} \

     

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                   ${optionalString (cfg.uncoreOffset != null) "--uncore ${cfg.uncoreOffset}"} \

     

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                   ${optionalString (cfg.analogioOffset != null) "--analogio ${cfg.analogioOffset}"} \

     

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                   ${optionalString (cfg.temp != null) "--temp ${cfg.temp}"} \

     

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                   ${optionalString (cfg.tempAc != null) "--temp-ac ${cfg.tempAc}"} \

     

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                   ${optionalString (cfg.tempBat != null) "--temp-bat ${cfg.tempBat}"}

     

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               '';

     

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             };

     

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           };

     

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           systemd.timers.undervolt = {

     

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             description = "Undervolt timer to ensure voltage settings are always applied";

     

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             partOf = [ "undervolt.service" ];

     

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             wantedBy = [ "multi-user.target" ];

     

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             timerConfig = {

     

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               OnBootSec = "2min";

     

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               OnUnitActiveSec = "30";

     

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             };

     

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           };

     

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         };

     

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       }