#!/bin/sh

read cpu_cpu cpu_user cpu_nice cpu_system cpu_idle cpu_iowait cpu_hardirq cpu_softirq cpu_steal < /proc/stat
echo "$cpu_user $cpu_nice $cpu_system $cpu_idle $cpu_iowait $cpu_hardirq $cpu_softirq"
cpu_active_prev=$((cpu_user+cpu_system+cpu_nice+cpu_softirq+cpu_hardirq))
cpu_inactive_prev=$((cpu_idle+cpu_iowait))

iperf3 -c 192.168.0.99
iperf3 -c 192.168.0.99 -u -b 99M

read cpu_cpu cpu_user cpu_nice cpu_system cpu_idle cpu_iowait cpu_hardirq cpu_softirq cpu_steal < /proc/stat
echo "$cpu_user $cpu_nice $cpu_system $cpu_idle $cpu_iowait $cpu_hardirq $cpu_softirq"
cpu_active_curr=$((cpu_user+cpu_system+cpu_nice+cpu_softirq+cpu_hardirq))
cpu_inactive_curr=$((cpu_idle+cpu_iowait))

cpu_util=$((100*( cpu_active_curr-cpu_active_prev ) / (cpu_active_curr + cpu_inactive_curr - cpu_active_prev - cpu_inactive_prev) ))
printf "CPU Utilization percent: %s\n" "$cpu_util"
exit 0