rss-irq

#!/bin/sh

# https://ixnfo.com/en/configuring-rps-receive-packet-steering.html
# https://bitsum.com/tools/cpu-affinity-calculator/
get_device_irq() {
  local device="$1"

  local line=$(grep -m 1 "${device}\$" /proc/interrupts)
  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")
  [ -z "$irq" ] && return 0

  echo -n "${core_mask}" > /proc/irq/${irq}/smp_affinity
}

echo 3 > /sys/class/net/eth1/queues/tx-0/xps_cpus
set_interface_core 1 "eth1-0"
set_interface_core 2 "eth1-16"
#set_interface_core 4 "eth1-18"
#set_interface_core 8 "eth1-21"


echo 3 > /sys/class/net/eth1/queues/rx-0/rps_cpus
# set_interface_core 1 "eth1-0"
# set_interface_core 2 "eth1-16"
set_interface_core 4 "eth1-18"
set_interface_core 8 "eth1-21"



echo f > /sys/class/net/eth2/queues/rx-0/rps_cpus
set_interface_core 1 "eth2-0"
set_interface_core 2 "eth2-16"
set_interface_core 4 "eth2-18"
set_interface_core 8 "eth2-21"