Scans for smp affinity for the interrupts on the passed interfaces.

get_interrupt_affinity.sh

#!/bin/bash

usage()
{
    cat >&2 <<EOF
usage:  $0 [-h] iface [iface2 [...]]

    Scans for smp affinity for the interrupts on the passed interfaces.
    Must be run as root.

    Example:  $0 eth4 eth5

EOF
}


while getopts "h?" opt ; do
    case "$opt" in
        h) usage ; exit ;;
        [?]) usage ; exit ;;
    esac
done

# Needs interface arguments
if (($# == 0)) ; then
    usage
    exit 1
fi


# Make sure only root can run our script
if [ "$(id -u)" != "0" ]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi


# Do the work
for eth in "$@" ; do
    eth_interrupts=$(grep $eth /proc/interrupts | tr ':' ' ' | awk '{print $1}')
    for int in $eth_interrupts ; do 
        echo -n "$eth  $int  "
        cat /proc/irq/$int/smp_affinity
    done
done