A simple script to get average CPU load of a group of processes

avgcpuload.sh

#!/bin/bash

TMP_FILE=/tmp/cpuload
PNAME="node"
tries=0

while [ $tries -lt 100 ]
do
  ps ax -o comm -o %cpu | grep $PNAME | awk '{s+=$2}END{print s}' | tee -a $TMP_FILE
  sleep 1
  let tries++
done

awk '{total+=$1;count++}END{print total/count "% average CPU load"}' $TMP_FILE
rm $TMP_FILE