feat: nb performance tweaks

hosts/nb/hardware-configuration.nix

@@ -17,6 +17,15 @@
   boot.kernelModules = [ "amdgpu" ];
   boot.extraModulePackages = [ ];
 
+  # AMD Ryzen 7 7840U optimizations
+  boot.kernelParams = [
+    "amd_pstate=active"
+    "amdgpu.dcdebugmask=0x10"
+    "amdgpu.dc=1"
+    "snd_hda_intel.power_save=1"
+    "transparent_hugepage=madvise"
+  ];
+
   fileSystems."/" = {
     device = "none";
     fsType = "tmpfs";
@@ -38,9 +47,10 @@
     options = [
       "subvol=@"
       "ssd"
-      "compress=zstd:3"
+      "compress=zstd:1"
       "discard=async"
       "noatime"
+      "commit=120"
     ];
   };
 
@@ -51,9 +61,10 @@
     options = [
       "subvol=@nix-store"
       "ssd"
-      "compress=zstd:3"
+      "compress=zstd:1"
       "discard=async"
       "noatime"
+      "commit=120"
     ];
   };
 
@@ -64,9 +75,10 @@
     options = [
       "subvol=@nix-persist"
       "ssd"
-      "compress=zstd:3"
+      "compress=zstd:1"
       "discard=async"
       "noatime"
+      "commit=120"
     ];
   };
 
@@ -79,13 +91,11 @@
   networking.useDHCP = lib.mkDefault true;
   # networking.interfaces.wlp52s0.useDHCP = lib.mkDefault true;
 
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
   hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
 
   hardware.graphics = {
     enable = true;
     extraPackages = with pkgs; [
-      amdvlk
       vaapiVdpau
       libvdpau-va-gl
       libva