[18.06.4] speed fix for BT HomeHub 5a

pstlr78 · March 7, 2020, 1:05pm

Judging from this:

and this:

alanswanson/openwrt/blob/0a04d809afd82d22658331f5e9cacee1a67dd1c8/package/network/config/netifd/files/etc/hotplug.d/net/20-smp-packet-steering

#!/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

This file has been truncated. show original

I can see that if somebody wants to manually edit the existing "20-smp-tune" file to take advantage of the performance fix needs to copy/paste the following instead of the code suggested back in 12 Nov '19:

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

Could you please confirm if that's the case or if the 4 additional lines that I removed are still needed? I am talking about those:

ntxq="$(ls -d ${dev}/queues/tx-* | wc -l)"
idx=$(($irq_cpu + 1))
            
let "idx = idx + 1"
[ "$idx" -ge "$NPROCS" ] && idx=0