Bash script to set network interrupts in Ubuntu linux

set_interrupts.sh

#!/bin/bash

[[ $# -lt 1 ]] && echo "Usage: $0 [INTERFACE] [RESET]"  && exit 1
IFACE=$1

# Tweak the CPUSTART to fit your system
CPUSTART=32
[[ $IFACE == "eth2" ]] && CPUSTART=8
[[ $IFACE == "eth3" ]] && CPUSTART=16
[[ $IFACE == "eth4" ]] && CPUSTART=24

THREAD=0
cat /proc/interrupts | grep "$IFACE-" | cut -d':' -f1 > tmp.interfaces

for IRQ in $(cat tmp.interfaces)
do
  if [[ $2 == 'RESET' ]]
  then
      CMD="echo '0-159' > /proc/irq/$IRQ/smp_affinity_list"
  else
      CPU=$(( CPUSTART + THREAD ))
      CMD="echo $CPU > /proc/irq/$IRQ/smp_affinity_list"
  fi
  echo sudo bash -c "$CMD"
  sudo bash -c "$CMD"
  THREAD=$(($THREAD+1))
done

./read_interrupts.sh $IFACE  # see https://gist.github.com/jschaub30/9f9d9f54d3ee6f53d2b3