From 7a4fc8906cd2256e7381d1c043e19872eeb06883 Mon Sep 17 00:00:00 2001 From: David Bauer Date: Mon, 27 Jul 2020 23:13:02 +0200 Subject: [PATCH] rockchip: distribute net interrupts This adds a hotplug script for distributing interrupts of eth0 and eth1 across different cores. Otherwise the forwarding performance between eth0 and eth1 is severely affected. The existing SMP distribution mechanic in OpenWrt can't be used here, as the actual device IRQ has to be moved to dedicated cores. In case of eth1, this is in fact the USB3 controller. Signed-off-by: David Bauer --- .../etc/hotplug.d/net/40-net-smp-affinity | 30 +++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 target/linux/rockchip/armv8/base-files/etc/hotplug.d/net/40-net-smp-affinity diff --git a/target/linux/rockchip/armv8/base-files/etc/hotplug.d/net/40-net-smp-affinity b/target/linux/rockchip/armv8/base-files/etc/hotplug.d/net/40-net-smp-affinity new file mode 100644 index 000000000000..ab3f9546543e --- /dev/null +++ b/target/linux/rockchip/armv8/base-files/etc/hotplug.d/net/40-net-smp-affinity @@ -0,0 +1,30 @@ +#!/bin/sh + +[ "$ACTION" = add ] || exit + +get_device_irq() { + local device="$1" + + local line=$(grep -m 1 "${device}\$" /proc/interrupts) + echo $(echo ${line} | sed 's/:.*//') +} + +set_interface_core() { + local core_mask="$1" + local interface="$2" + local device="$3" + + [ -z "${device}" ] && device="$interface" + + local irq=$(get_device_irq "$device") + + echo "${core_mask}" > /proc/irq/${irq}/smp_affinity +} + +case "$(board_name)" in +friendlyarm,nanopi-r2s) + set_interface_core 2 "eth0" + set_interface_core 4 "eth1" "xhci-hcd:usb3" + ;; +esac + -- 2.30.2