cpu affinity

Author: randomizedcoder

desktop/l2/CPU_and_IRQ_optimization.md

@@ -63,6 +63,21 @@ The system manages 4 WiFi interfaces:
 
 All interfaces operate in 5GHz band with WPA3-SAE authentication.
 
+### WiFi WMM (QoS) Configuration
+
+This system uses specific WMM (Wi-Fi Multimedia) settings for the best effort (AC_BE) access category, as suggested by Nokia WiFi engineer Koen De Schepper, to optimize WiFi performance for normal-priority traffic:
+
+```
+# Normal priority / AC_BE = best effort
+wmm_ac_be_aifs=1
+wmm_ac_be_cwmin=4
+wmm_ac_be_cwmax=4
+wmm_ac_be_txop_limit=32
+wmm_ac_be_acm=0
+```
+
+These values are set in the `hostapd-multi.nix` configuration and ensure that best effort traffic is handled with optimal latency and fairness, as recommended by industry experts.
+
 ## CPU and IRQ Optimization
 
 ### System Architecture

desktop/l2/README.md

@@ -41,6 +41,7 @@
       ./network-optimization.nix
       # CPU and IRQ optimization modules
       ./irq-affinity.nix
+      ./systemd-slices.nix
       ./kernel-params.nix
       ./monitoring.nix
     ];

desktop/l2/configuration.nix

@@ -17,7 +17,7 @@ let
     bridge = "br0";
     ieee80211w = 2;
 
-    # WMM tuning
+    # WMM tuning (as recommended by Koen De Schepper, Nokia)
     wmm_ac_be_aifs = 1;
     wmm_ac_be_cwmin = 4;
     wmm_ac_be_cwmax = 4;
@@ -127,6 +127,7 @@ in {
           }
         ];
       };
+      serviceConfig.Slice = "kea.slice";
     };
   };
   # services.prometheus.exporters.kea = {
@@ -148,6 +149,7 @@ in {
         serve_rfc1918 = true;
       };
     };
+    serviceConfig.Slice = "pdns.slice";
   };
 
   # IPv6 SLAAC via radvd
@@ -166,6 +168,7 @@ in {
         };
       };
     '';
+    serviceConfig.Slice = "radvd.slice";
   };
 
   # https://nixos.wiki/wiki/Systemd-networkd