From 3b2235f8a89b612cef7b311da8e3586a2c191cdf Mon Sep 17 00:00:00 2001
From: Dongming Han <handongming@gl-inet.com>
Date: Fri, 15 Jul 2022 10:42:57 +0800
Subject: [PATCH] ipq40xx: add smp network performance optimization

source: https://github.com/coolsnowwolf/lede/commit/b93293ef8dde8c0447c01569f968b389bedbbdb1
---
 .../etc/hotplug.d/net/21_adjust_network       |  8 ++
 .../ipq40xx/base-files/lib/adjust_network.sh  | 89 +++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 target/linux/ipq40xx/base-files/etc/hotplug.d/net/21_adjust_network
 create mode 100644 target/linux/ipq40xx/base-files/lib/adjust_network.sh

diff --git a/target/linux/ipq40xx/base-files/etc/hotplug.d/net/21_adjust_network b/target/linux/ipq40xx/base-files/etc/hotplug.d/net/21_adjust_network
new file mode 100644
index 0000000000..bb4d215b4d
--- /dev/null
+++ b/target/linux/ipq40xx/base-files/etc/hotplug.d/net/21_adjust_network
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+[ -f /lib/adjust_network.sh ] && {
+	. /lib/adjust_network.sh
+	adjust_edma_smp_affinity
+	adjust_radio_smp_affinity
+	adjust_eth_queue
+}
diff --git a/target/linux/ipq40xx/base-files/lib/adjust_network.sh b/target/linux/ipq40xx/base-files/lib/adjust_network.sh
new file mode 100644
index 0000000000..99423022c5
--- /dev/null
+++ b/target/linux/ipq40xx/base-files/lib/adjust_network.sh
@@ -0,0 +1,89 @@
+#!/bin/sh
+# this scripts is used for adjust cpu's choice of interrupts.
+#
+
+################################################
+# Adjust smp_affinity of edma
+# Globals:
+#    None
+# Arguments:
+#    None
+# Returns:
+#    None
+# Remark:
+#    execute only once on start-up.
+################################################
+adjust_edma_smp_affinity() {
+	grep -q edma_eth_ /proc/interrupts || return 0
+	local nr=`cat /proc/cpuinfo | grep processor | wc -l`
+	local cpu=0
+	local tx_irq_num
+
+	for tx_num in `seq 0 1 15` ; do
+		cpu=`printf "%x" $((1<<((tx_num/4+0)%nr)))`
+		tx_irq_num=`grep -m1 edma_eth_tx$tx_num /proc/interrupts | cut -d ':' -f 1 | tail -n1 | tr -d ' '`
+		[ -n "$tx_irq_num" ] && echo $cpu > /proc/irq/$tx_irq_num/smp_affinity
+	done
+
+	for rx_num in `seq 0 1 7` ; do
+		cpu=`printf "%x" $((1<<((rx_num/2)%nr)))`
+		rx_irq_num=`grep -m1 edma_eth_rx$rx_num /proc/interrupts | cut -d ':' -f 1 | tail -n1 | tr -d ' '`
+		[ -n "$rx_irq_num" ] && echo $cpu > /proc/irq/$rx_irq_num/smp_affinity
+	done
+}
+
+################################################
+# Adjust smp_affinity of ath10k for 2G and 5G
+# Globals:
+#    None
+# Arguments:
+#    None
+# Returns:
+#    None
+# Remark:
+#    execute only once on start-up.
+################################################
+adjust_radio_smp_affinity() {
+	local irqs="`grep -E 'ath10k' /proc/interrupts | cut -d ':' -f 1 | tr -d ' '`"
+	local nr=`cat /proc/cpuinfo | grep processor | wc -l`
+	local idx=2
+
+	for irq in $irqs; do
+		cpu=`printf "%x" $((1<<((idx)%nr)))`
+		echo $cpu > /proc/irq/$irq/smp_affinity
+		idx=$((idx+1))
+	done
+}
+
+################################################
+# Adjust queue of eth
+# Globals:
+#    None
+# Arguments:
+#    None
+# Returns:
+#    None
+# Remark:
+#    Each network reboot needs to be executed.
+################################################
+adjust_eth_queue() {
+	local nr=`cat /proc/cpuinfo | grep processor | wc -l`
+	local idx=0
+
+	for epath in /sys/class/net/eth[0-9]*; do
+		test -e $epath || break
+		echo $epath | grep -q "\." && continue
+		eth=`basename $epath`
+		idx=0
+		for exps in /sys/class/net/$eth/queues/rx-[0-9]*/rps_cpus; do
+			test -e $exps || break
+			cpu=`printf "%x" $((1<<((idx+1)%nr)))`
+			idx=$((idx+1))
+			echo $cpu > $exps
+			echo 256 > `dirname $exps`/rps_flow_cnt
+		done
+		which ethtool >/dev/null 2>&1 && ethtool -K $eth gro off
+	done
+
+	echo 1024 > /proc/sys/net/core/rps_sock_flow_entries
+}
-- 
2.17.1