#!/bin/zsh

for i in `yes|head -100`
do
  time1=`date '+%s.%N'`
  s1=`cat /proc/interrupts`
  sleep 1
  time2=`date '+%s.%N'`
  s2=`cat /proc/interrupts`

  t10=`echo "$s1" | awk '$1=="0:"{ print $2}'`
  t11=`echo "$s1" | awk '$1=="0:"{ print $3}'`
  t20=`echo "$s2" | awk '$1=="0:"{ print $2}'`
  t21=`echo "$s2" | awk '$1=="0:"{ print $3}'`
  d1=`expr $t20 - $t10`
  d2=`expr $t21 - $t11`
  echo $d1 + $d2 = `expr $d1 + $d2` `calc $time2 - $time1`s
done | cat -n