3e4d2d5a99
initscripts will run while building OpenWRT images on the host system as described on the wiki: https://openwrt.org/docs/guide-developer/procd-init-scripts#init_scripts_during_compilation Thus we no longer execute any commands and wrap functionality into proper start_service() function
44 lines
1.4 KiB
Bash
Executable File
44 lines
1.4 KiB
Bash
Executable File
#!/bin/sh /etc/rc.common
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uci_banirq=irqbalance.irqbalance.banirq
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cpu_irq_eth=2
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move_eth0_irq() {
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# Move eth0 IRQs to CPU1 (numbered 1-4 when writing)
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# And ban irqbalance from messing with it
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# The USB3 Ethernet IRQs cannot be moved and must stay on CPU0
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irqs_eth0=$(sed -rn "s/^\s*([0-9]+):.*eth0$/\1/p" /proc/interrupts)
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for n in ${irqs_eth0}; do
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echo ${cpu_irq_eth} > /proc/irq/${n}/smp_affinity
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if ! uci get ${uci_banirq} | grep -q ${n}; then
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uci add_list ${uci_banirq}=${n}
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fi
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done
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uci commit irqbalance
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logger -t "irq_eth_pin" "Moved eth0 IRQs ${irqs_eth0} to cpu${cpu_irq_eth}"
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logger -t "irq_eth_pin" "See all interrupts with: cat /proc/interrupts"
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}
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move_softirqs() {
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# Move softirqs for network traffic to CPU2 and CPU3
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# Maybe not a brilliant idea because the softirqs are probably better off
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# being processed on the CPU that got the original IRQ
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# (and that is exactly the default when the value is 0)
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# NOTE: it appears that the openwrt 20.02-rc1 kernel has a bug that
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# returns "No such file or directory" for /sys/class/net/eth1/queues/xps_cpus
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for ifname in eth0; do # eth1
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for f in $(find /sys/class/net/${ifname}/queues -name xps_cpus -o -name rps_cpus); do
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if [ -f ${f} ]; then
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echo "${f} = $(cat ${f})"
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echo c >${f}
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fi
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done
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done
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}
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start_service() {
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move_eth0_irq
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}
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