netifd: update to the latest version, rewrite RPS/XPS handling
Remove RPS/XPS support from netifd core, move the logic to a hotplug script that uses a different policy which provides better performance and more fairness across flows Signed-off-by: Felix Fietkau <nbd@nbd.name>v19.07.3_mercusys_ac12_duma
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810659a22c
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916e33fa1e
@ -0,0 +1,67 @@
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#!/bin/sh
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[ "$ACTION" = add ] || exit
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NPROCS="$(grep -c "^processor.*:" /proc/cpuinfo)"
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[ "$NPROCS" -gt 1 ] || exit
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PROC_MASK="$(( (1 << $NPROCS) - 1 ))"
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find_irq_cpu() {
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local dev="$1"
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local match="$(grep -m 1 "$dev\$" /proc/interrupts)"
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local cpu=0
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[ -n "$match" ] && {
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set -- $match
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shift
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for cur in `seq 1 $NPROCS`; do
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[ "$1" -gt 0 ] && {
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cpu=$(($cur - 1))
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break
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}
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shift
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done
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}
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echo "$cpu"
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}
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set_hex_val() {
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local file="$1"
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local val="$2"
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val="$(printf %x "$val")"
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[ -n "$DEBUG" ] && echo "$file = $val"
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echo "$val" > "$file"
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}
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default_ps="$(uci get "network.@globals[0].default_ps")"
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[ -n "$default_ps" -a "$default_ps" != 1 ] && exit 0
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exec 512>/var/lock/smp_tune.lock
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flock 512 || exit 1
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for dev in /sys/class/net/*; do
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[ -d "$dev" ] || continue
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# ignore virtual interfaces
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[ -n "$(ls "${dev}/" | grep '^lower_')" ] && continue
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[ -d "${dev}/device" ] || continue
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device="$(readlink "${dev}/device")"
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device="$(basename "$device")"
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irq_cpu="$(find_irq_cpu "$device")"
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irq_cpu_mask="$((1 << $irq_cpu))"
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for q in ${dev}/queues/rx-*; do
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set_hex_val "$q/rps_cpus" "$(($PROC_MASK & ~$irq_cpu_mask))"
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done
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ntxq="$(ls -d ${dev}/queues/tx-* | wc -l)"
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idx=$(($irq_cpu + 1))
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for q in ${dev}/queues/tx-*; do
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set_hex_val "$q/xps_cpus" "$((1 << $idx))"
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let "idx = idx + 1"
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[ "$idx" -ge "$NPROCS" ] && idx=0
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done
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done
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