init

modules/system/sched-ext.nix

@@ -0,0 +1,39 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.myModules.sched-ext;
+in
+{
+  options.myModules.sched-ext = {
+    enable = lib.mkEnableOption "sched-ext (scx) schedulers";
+    
+    scheduler = lib.mkOption {
+      type = lib.types.enum [ "scx_rustland" "scx_lavd" "scx_rusty" "scx_bpfland" ];
+      default = "scx_lavd";
+      description = "The scx scheduler to run.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # Install the schedulers
+    environment.systemPackages = [ pkgs.scx ];
+
+    # Systemd service to run the scheduler
+    systemd.services.scx = {
+      description = "sched-ext scheduler (${cfg.scheduler})";
+      wantedBy = [ "multi-user.target" ];
+      path = [ pkgs.scx ];
+      serviceConfig = {
+        ExecStart = "${pkgs.scx}/bin/${cfg.scheduler}";
+        Restart = "always";
+        RestartSec = "3";
+        Nice = -20;
+      };
+    };
+  };
+}