audio latency shit idk

flake.nix

@@ -19,6 +19,10 @@
     niri = {
       url = "github:epireyn/niri-flake";
     };
+    system76-scheduler-niri = {
+      url = "github:Kirottu/system76-scheduler-niri";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
 
     nix-index-database = {
       url = "github:nix-community/nix-index-database";

home-manager/modules/ezpcusr.nix

@@ -11,6 +11,7 @@ in {
     inputs.niri.homeModules.niri
 
     inputs.noctalia.homeModules.default
+    inputs.system76-scheduler-niri.homeModules.default
   ];
   options.ezpcusr = {
     enable = mkEnableOption "Enable simple PC user config";
@@ -48,6 +49,8 @@ in {
   };
 
   config = lib.mkIf cfg.enable {
+    services.system76-scheduler-niri.enable = true;
+
     services.hypridle = {
       enable = lib.mkDefault true;
 

modules/ezpw.nix

@@ -74,6 +74,18 @@ in {
             };
           };
 
+          pipewire."99-custom.conf" = {
+            context.modules = [
+              {
+                name = "libpipewire-module-rt";
+                args = {
+                  nice.level = -11;
+                  rt.prio = 19;
+                };
+              }
+            ];
+          };
+
           pipewire-pulse."92-low-latency" = mkIf cfg.lowLatency {
             context.modules = [
               {

modules/workstation.nix

@@ -38,11 +38,11 @@ in {
       );
       initrd.verbose = lib.mkDefault (!cfg.fancyBoot);
       plymouth.enable = lib.mkDefault cfg.fancyBoot;
-      kernelParams = lib.mkIf cfg.fancyBoot [
+      kernelParams = (lib.optionals cfg.fancyBoot [
         "quiet"
         "rd.systemd.show_status=auto"
         "vt.global_cursor_default=0"
-      ];
+      ]) ++ ["threadirqs"];
 
       loader.timeout = lib.mkIf cfg.fancyBoot 0;
     };
@@ -66,7 +66,7 @@ in {
 
     # Make battery usage and performance sane
     # hardware.system76.power-daemon.enable = lib.mkDefault true;
-    zramSwap.enable = true;
+    boot.zswap.enable = lib.mkDefault true;
     services.tlp.enable = false;
     services.power-profiles-daemon.enable = lib.mkDefault false;
     services.system76-scheduler = {
@@ -101,6 +101,9 @@ in {
     services.udev.extraRules = ''
       KERNEL=="rtc0", GROUP="users"
       KERNEL=="hpet", GROUP="users"
+
+      DEVPATH=="/devices/virtual/misc/cpu_dma_latency", OWNER="root", GROUP="audio", MODE="0660"
+      DEVPATH=="/devices/virtual/misc/hpet", OWNER="root", GROUP="audio", MODE="0660"
     '';
 
     # Allows more open files, useful for sync software and some other stuff
@@ -129,6 +132,12 @@ in {
       }
 
       # Allows greater realtime priority, useful for audio, emulators, games, etc
+      {
+        domain = "@audio";
+        type = "-";
+        item = "rtprio";
+        value = "90";
+      }
       {
         domain = "@users";
         type = "-";
@@ -150,7 +159,7 @@ in {
       extraGroups = [
         "adbusers" # run ADB commands
         "audio" # soundcard access
-        "rtkit" # realtime stuff?
+        "rtkit" # realtime stuff (incl audio)
         "video" # webcam access (and maybe wayland too?)
         "libvirtd" # run VMs through libvirt
         "kvm" # run KVM VMs