print /proc/interrupts

#!/bin/sh

sed -r -e 's/^ *//' -e 's/ {2,}/|/g' < /proc/interrupts | 
  awk -F'|' '
    BEGIN { cpu_n = 0; }
    NR == 1 {
      for(i = 1; i <= NF; i++)
        if($i ~ CPU)
          cpu_n++;
    }
    NR > 1 {
      sum = 0;
      for(i = 2; i <= cpu_n + 1; i++)
        sum += $i;
      printf("%4s %12d %-20s ", $1, sum, $6);
      for(i = 1; i < 7; i++)
        $i = "";
      print;
    }' | 
  sort -nrk2