#!/bin/bash
set -eu
if [ $EUID -ne 0 ]; then
  echo "You must be root!" >&2
  exit 1
fi

readonly interval_num=${1:-60}
readonly interval_sleep=${2:-10}

TIME_U1=0
TIME_K1=0
TIME_T1=0
TIME_U2=0
TIME_K2=0
TIME_T2=0

if [ "$(pidof scope-probe)" == "" ]; then
  echo "No scope-probe process running - aborting" >&2
  exit 1
fi

for ((i=0; i<"$interval_num"; i++)); do
  sleep "$interval_sleep"
  TIME_U1=$TIME_U2
  TIME_K1=$TIME_K2
  TIME_T1=$TIME_T2

  TIME_U2=$(gawk '{print $14"*10"}'<"/proc/$(pidof scope-probe)/stat" | bc)
  TIME_K2=$(gawk '{print $15"*10"}'<"/proc/$(pidof scope-probe)/stat" | bc)
  TIME_T2=$(( TIME_U2 + TIME_K2 ))
  echo "utime $(( TIME_U2 - TIME_U1)) + stime $(( TIME_K2 - TIME_K1 )) = $(( TIME_T2 - TIME_T1 ))"
done
