From 67c774204a19e5964ec4e04a4e7cd0bfc4024553 Mon Sep 17 00:00:00 2001
From: pober <paul.obernesser@summitwave.eu>
Date: Fri, 24 Apr 2026 10:57:43 +0200
Subject: [PATCH] Dante buffers and cpu affinity.

---
 .../dante_package/dante_data/capability/dante.json   | 12 ++++++++----
 src/service/auracast-frontend.service                |  2 ++
 src/service/auracast-script.service                  |  2 ++
 src/service/auracast-server.service                  |  4 +++-
 src/service/pipewire-aes67.service                   |  2 ++
 src/service/ptp_aes67.service                        |  2 ++
 6 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/src/dep/dante_package/dante_data/capability/dante.json b/src/dep/dante_package/dante_data/capability/dante.json
index 9840222..be0639b 100644
--- a/src/dep/dante_package/dante_data/capability/dante.json
+++ b/src/dep/dante_package/dante_data/capability/dante.json
@@ -16,7 +16,7 @@
 				48000
 			],
 		"samplesPerPeriod" : 16,
-		"periodsPerBuffer" : 300,
+		"periodsPerBuffer" : 150,
 		"networkLatencyMinMs" : 2,
 		"networkLatencyDefaultMs" : 5,
 		"supportedEncodings" :
@@ -24,7 +24,10 @@
 				"PCM16"
 			],
 		"defaultEncoding" : "PCM16",
-		"numDepCores" : 1
+		"numDepCores" : 
+			[
+				2
+			]
 	},
 	"network" :
 	{
@@ -50,15 +53,16 @@
 	"alsaAsrc":
 	{
 		"enableAlsaAsrc": true,
+		"cpuAffinity": 3,
 		"deviceConfigurations": [
 			{
-			"deviceIdentifier": "hw:0,0",
+			"deviceIdentifier": "hw:3,0,0",
 			"direction": "playback",
 			"bitDepth": 16,
 			"numOpenChannels": 6,
 			"alsaChannelRange": "0-5",
 			"danteChannelRange": "0-5",
-			"bufferSize": 4800,
+			"bufferSize": 960,
 			"samplesPerPeriod": 16
 			}
 		]
diff --git a/src/service/auracast-frontend.service b/src/service/auracast-frontend.service
index dca1b9e..fd3b46f 100644
--- a/src/service/auracast-frontend.service
+++ b/src/service/auracast-frontend.service
@@ -10,6 +10,8 @@ WorkingDirectory=/home/caster/bumble-auracast/src/auracast/server
 ExecStart=/home/caster/bumble-auracast/src/auracast/server/start_frontend_https.sh
 Restart=on-failure
 Environment=LOG_LEVEL=INFO
+AllowedCPUs=0
+CPUAffinity=0
 
 [Install]
 WantedBy=multi-user.target
diff --git a/src/service/auracast-script.service b/src/service/auracast-script.service
index 3bad0d9..5a3b0f5 100644
--- a/src/service/auracast-script.service
+++ b/src/service/auracast-script.service
@@ -9,6 +9,8 @@ ExecStart=/home/caster/bumble-auracast/.venv/bin/python src/auracast/multicast_s
 Restart=on-failure
 Environment=PYTHONUNBUFFERED=1
 Environment=LOG_LEVEL=INFO
+AllowedCPUs=0
+CPUAffinity=0
 
 [Install]
 WantedBy=default.target
diff --git a/src/service/auracast-server.service b/src/service/auracast-server.service
index 06395bf..b7cbea2 100644
--- a/src/service/auracast-server.service
+++ b/src/service/auracast-server.service
@@ -10,8 +10,10 @@ Restart=on-failure
 Environment=PYTHONUNBUFFERED=1
 Environment=LOG_LEVEL=INFO
 CPUSchedulingPolicy=fifo
-CPUSchedulingPriority=99
+CPUSchedulingPriority=10
 LimitRTPRIO=99
+AllowedCPUs=1
+CPUAffinity=1
 
 [Install]
 WantedBy=default.target
diff --git a/src/service/pipewire-aes67.service b/src/service/pipewire-aes67.service
index d3eeb30..05e0598 100644
--- a/src/service/pipewire-aes67.service
+++ b/src/service/pipewire-aes67.service
@@ -9,6 +9,8 @@ ExecStartPre=/bin/sh -lc 'for i in $(seq 1 60); do ip route show default >/dev/n
 ExecStart=/usr/bin/pipewire-aes67 -c /home/caster/bumble-auracast/src/service/aes67/pipewire-aes67.conf
 Restart=always
 RestartSec=5s
+AllowedCPUs=0
+CPUAffinity=0
 # Avoid StartLimitHit on quick failures during boot; let RestartSec handle pacing
 StartLimitIntervalSec=0
 
diff --git a/src/service/ptp_aes67.service b/src/service/ptp_aes67.service
index 99097bf..3fb55d7 100644
--- a/src/service/ptp_aes67.service
+++ b/src/service/ptp_aes67.service
@@ -6,6 +6,8 @@ After=network.target
 Type=simple
 ExecStart=/usr/sbin/ptp4l -i eth0 -f /home/caster/bumble-auracast/src/service/aes67/ptp_aes67_1.conf
 Restart=on-failure
+AllowedCPUs=0
+CPUAffinity=0
 StandardOutput=journal
 StandardError=journal