123 lines
3.5 KiB
Bash
Executable File
123 lines
3.5 KiB
Bash
Executable File
#!/bin/sh /etc/rc.common
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######################################################################
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# vim: set ft=bash
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# shellcheck disable=2155,3019,3043,3057,3060
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######################################################################
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START=93
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PROG=smp_affinity
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log_msg() {
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local irq_name="$1" affinity="$2" irq="$3"
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msg="$(printf "Pinning IRQ($irq) %-24s to CPU ${affinity}\n" "$irq_name")"
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logger -t "$PROG" "$msg"
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}
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######################################################################
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### Takes a comma, space separated, or range list of CPU numbers and
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## returns a bitmask of CPUs.
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## cpus_to_bitmask "0,1,2,3" -> f
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## cpus_to_bitmask "0 1 2 3" -> f
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## cpus_to_bitmask "0-3" -> f
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## cpus_to_bitmask "3" -> 8
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#######################################################################
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cpus_to_bitmask() {
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local bitmask=0
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# shellcheck disable=2048
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for range in ${*//,/ }; do
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start="${range%-*}"
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end="${range#*-}"
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if [ -z "$end" ]; then
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bitmask="$((bitmask | 1 << start))"
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else
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bitmask="$((bitmask | (2 ** (end - start + 1) - 1) << start))"
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fi
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done
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printf '%x' $bitmask
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}
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######################################################################
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### Takes a bitmask of CPUs and returns a space separated list of
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## CPU numbers.
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## bitmask_to_cpus f -> 0 1 2 3
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######################################################################
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bitmask_to_cpus() {
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[ "${1:0:2}" != "0x" ] && set -- "0x$1"
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local bitmask="$(printf '%d' "$1")"
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local cpus=""
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for i in $(seq 0 63); do
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if [ $((bitmask & 1)) -ne 0 ]; then
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cpus="$cpus $i"
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fi
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bitmask=$((bitmask >> 1))
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done
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echo "${cpus# }"
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}
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######################################################################
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### Sets the affinity of the IRQs with the given name to the given CPU.
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## 1st argument: IRQ name ("reo2host-destination-ring1") (req)
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## 2nd argument: CPU number (req)
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######################################################################
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set_affinity() {
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local irq_name="$1" affinity="$2" bitmask irq
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awk -v irq_name="$1" '$0 ~ irq_name { print substr($1, 1, length($1)-1); exit }' /proc/interrupts \
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| while read -r irq; do
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$enable_log && {
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log_msg "$irq_name" "$affinity" "$irq"
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}
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bitmask=$(cpus_to_bitmask "$affinity") && echo "$bitmask" > "/proc/irq/$irq/smp_affinity"
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done
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}
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enable_affinity_ipq807x() {
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# assign 4 rx interrupts to each core
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set_affinity 'reo2host-destination-ring1' 0
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set_affinity 'reo2host-destination-ring2' 1
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set_affinity 'reo2host-destination-ring3' 2
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set_affinity 'reo2host-destination-ring4' 3
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# assign 3 tcl completions to last 3 CPUs
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set_affinity 'wbm2host-tx-completions-ring1' 1
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set_affinity 'wbm2host-tx-completions-ring2' 2
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set_affinity 'wbm2host-tx-completions-ring3' 3
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# assign 3 ppdu mac interrupts to last 3 cores
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set_affinity 'ppdu-end-interrupts-mac1' 1
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set_affinity 'ppdu-end-interrupts-mac2' 2
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set_affinity 'ppdu-end-interrupts-mac3' 3
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# assign 4 lan/wan to core 4
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set_affinity 'edma_txcmpl' 3
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set_affinity 'edma_rxfill' 3
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set_affinity 'edma_rxdesc' 3
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set_affinity 'edma_misc' 3
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}
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boot() {
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local enable
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config_load smp_affinity
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config_get_bool enable "general" enable 1
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config_get_bool enable_log "general" enable_log 1
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[ "$enable" -eq 1 ] && enable=true || enable=false
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[ "$enable_log" -eq 1 ] && enable_log=true || enable_log=false
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$enable && enable_affinity_ipq807x
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}
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