1 files changed, 62 insertions, 0 deletions
diff --git a/package/network/config/netifd/files/etc/hotplug.d/net/20-smp-packet-steering b/package/network/config/netifd/files/etc/hotplug.d/net/20-smp-packet-steering
new file mode 100644
index 0000000000..9d7aaae0ac
--- /dev/null
+++ b/package/network/config/netifd/files/etc/hotplug.d/net/20-smp-packet-steering
@@ -0,0 +1,62 @@
+#!/bin/sh
+[ "$ACTION" = add ] || exit
+
+NPROCS="$(grep -c "^processor.*:" /proc/cpuinfo)"
+[ "$NPROCS" -gt 1 ] || exit
+
+PROC_MASK="$(( (1 << $NPROCS) - 1 ))"
+
+find_irq_cpu() {
+	local dev="$1"
+	local match="$(grep -m 1 "$dev\$" /proc/interrupts)"
+	local cpu=0
+
+	[ -n "$match" ] && {
+		set -- $match
+		shift
+		for cur in `seq 1 $NPROCS`; do
+			[ "$1" -gt 0 ] && {
+				cpu=$(($cur - 1))
+				break
+			}
+			shift
+		done
+	}
+
+	echo "$cpu"
+}
+
+set_hex_val() {
+	local file="$1"
+	local val="$2"
+	val="$(printf %x "$val")"
+	[ -n "$DEBUG" ] && echo "$file = $val"
+	echo "$val" > "$file"
+}
+
+packet_steering="$(uci get "network.@globals[0].packet_steering")"
+[ "$packet_steering" != 1 ] && exit 0
+
+exec 512>/var/lock/smp_tune.lock
+flock 512 || exit 1
+
+for dev in /sys/class/net/*; do
+	[ -d "$dev" ] || continue
+
+	# ignore virtual interfaces
+	[ -n "$(ls "${dev}/" | grep '^lower_')" ] && continue
+	[ -d "${dev}/device" ] || continue
+
+	device="$(readlink "${dev}/device")"
+	device="$(basename "$device")"
+	irq_cpu="$(find_irq_cpu "$device")"
+	irq_cpu_mask="$((1 << $irq_cpu))"
+
+	for q in ${dev}/queues/rx-*; do
+		set_hex_val "$q/rps_cpus" "$PROC_MASK"
+	done
+
+	for q in ${dev}/queues/tx-*; do
+		set_hex_val "$q/xps_cpus" "$PROC_MASK"
+	done
+done