feat: nb performance tweaks

hosts/nb/configuration.nix

@@ -74,10 +74,11 @@ in {
   users.defaultUserShell = pkgs.zsh;
 
   services.fwupd.enable = true;
+  services.irqbalance.enable = true;
 
   swapDevices = [ {
     device = "/nix/persist/swapfile";
-    size = 32 * 1024;  # Size is in megabytes (for hibernation)
+    size = 96 * 1024;  # Size is in megabytes (96GB for full hibernation with 92GB RAM)
   } ];
 
   # Memory tuning for 92GB RAM
@@ -91,6 +92,14 @@ in {
   # nixos cross building qemu
   boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
   boot.supportedFilesystems = [ "ntfs" ];
+
+  # Btrfs maintenance
+  services.btrfs.autoScrub = {
+    enable = true;
+    interval = "monthly";
+    fileSystems = [ "/nix" ];
+  };
+
   boot.plymouth = {
     enable = true;
     theme = "spin";

hosts/nb/hardware-configuration.nix

@@ -24,6 +24,7 @@
     "amdgpu.dc=1"
     "snd_hda_intel.power_save=1"
     "transparent_hugepage=madvise"
+    "pcie_aspm=force"
   ];
 
   fileSystems."/" = {
@@ -102,4 +103,9 @@
       libva-utils
     ];
   };
+
+  # Optimal I/O scheduler for NVMe SSDs
+  services.udev.extraRules = ''
+    ACTION=="add|change", KERNEL=="nvme[0-9]*", ATTR{queue/scheduler}="none"
+  '';
 }

hosts/nb/modules/desktop/bitwarden.nix

@@ -24,7 +24,7 @@ in
   #### Autostart Bitwarden desktop in your user session ########################
   systemd.user.services.bitwarden = {
     description = "Bitwarden Desktop";
-    after = [ "graphical-session.target" ];
+    after = [ "graphical-session.target" "network-online.target" ];
     wantedBy = [ "graphical-session.target" ];
     serviceConfig.ExecStart = "${pkgs.bitwarden}/bin/bitwarden";
     serviceConfig.Restart = "on-abort";

hosts/nb/modules/ollama.nix

@@ -11,4 +11,10 @@
       "mxbai-embed-large"
     ];
   };
+
+  # ROCm GPU configuration for AMD Ryzen 7 7840U (gfx1103)
+  systemd.services.ollama.environment = {
+    HSA_OVERRIDE_GFX_VERSION = "11.0.3";
+    ROCR_VISIBLE_DEVICES = "0";
+  };
 }

hosts/nb/modules/qdrant.nix

@@ -3,5 +3,9 @@
 {
   services.qdrant = {
     enable = true;
+    settings = {
+      storage.performance.max_search_threads = 8;
+      storage.optimizers.default_segment_number = 4;
+    };
   };
 }

hosts/nb/users/dominik.nix

@@ -83,6 +83,8 @@ let
     "gfx.webrender.force-disabled" = false;
     "gfx.webrender.software" = false;
     "gfx.webrender.compositor" = true;
+    "layers.mlgpu.enabled" = true;
+    "layers.gpu-process.enabled" = true;
   };
 
   # firefoxUserChrome = ''
@@ -235,6 +237,9 @@ in
         "--enable-features=UseOzonePlatform"
         "--ozone-platform=wayland"
         "--default-search-provider-search-url=\"https://www.perplexity.ai/search/?q=%s\""
+        "--enable-gpu-rasterization"
+        "--enable-zero-copy"
+        "--disable-gpu-driver-bug-workarounds"
       ];
       dictionaries = [
         pkgs.hunspellDictsChromium.en_US