phase 2: promote services/, tests/, patches/, lib/, scripts/

services/monero/xmrig.nix

@@ -0,0 +1,59 @@
+{
+  config,
+  lib,
+  pkgs,
+  service_configs,
+  ...
+}:
+let
+  threadCount = 12;
+in
+{
+  services.xmrig = {
+    enable = true;
+    package = lib.optimizePackage pkgs.xmrig;
+
+    settings = {
+      autosave = true;
+
+      cpu = {
+        enabled = true;
+        huge-pages = true;
+        hw-aes = true;
+        rx = lib.range 0 (threadCount - 1);
+      };
+
+      randomx = {
+        "1gb-pages" = true;
+      };
+
+      opencl = false;
+      cuda = false;
+
+      pools = [
+        {
+          url = "127.0.0.1:${builtins.toString service_configs.ports.private.p2pool_stratum.port}";
+          tls = false;
+        }
+      ];
+    };
+  };
+
+  systemd.services.xmrig.serviceConfig = {
+    Nice = 19;
+    CPUSchedulingPolicy = "idle";
+    IOSchedulingClass = "idle";
+  };
+
+  # Stop mining on UPS battery to conserve power
+  services.apcupsd.hooks = lib.mkIf config.services.apcupsd.enable {
+    onbattery = "systemctl stop xmrig";
+    offbattery = "systemctl start xmrig";
+  };
+
+  # Reserve 1GB huge pages for RandomX (dataset is ~2GB)
+  boot.kernelParams = [
+    "hugepagesz=1G"
+    "hugepages=3"
+  ];
+}