#!/bin/bash

PID=$1

if [ "x$PID" = "x" ] ; then
	exit 1
fi

# utime
USER_START=`awk '{print $14}' /proc/$PID/stat`
USER_ALL_START=`head -n1 /proc/stat | awk 'BEGIN {sum = 0} { for (i = 1; i <= NF; ++i) { sum += $i } } END {print sum}'`
sleep 1
USER_END=`awk '{print $14}' /proc/$PID/stat`
USER_ALL_END=`head -n1 /proc/stat | awk 'BEGIN {sum = 0} { for (i = 1; i <= NF; ++i) { sum += $i } } END {print sum}'`
USER=`echo "sacle=5; 100 * ($USER_END - $USER_START) / ($USER_ALL_END - $USER_ALL_START)" | bc`
echo "[process] jiffies for 1 sec: $(( $USER_END - $USER_START ))"
echo "[    all] jiffies for 1 sec: $(( $USER_ALL_END - $USER_ALL_START ))"
echo "[   cpu%] $USER %"

# stime
SYS_START=`awk '{print $15}' /proc/$PID/stat`
SYS_ALL_START=`head -n1 /proc/stat | awk 'BEGIN {sum = 0} { for (i = 1; i <= NF; ++i) { sum += $i } } END {print sum}'`
sleep 1
SYS_END=`awk '{print $15}' /proc/$PID/stat`
SYS_ALL_END=`head -n1 /proc/stat | awk 'BEGIN {sum = 0} { for (i = 1; i <= NF; ++i) { sum += $i } } END {print sum}'`
SYS=`echo "scale=5; 100 * ($SYS_END - $SYS_START) / ($SYS_ALL_END - $SYS_ALL_START)" | bc`
echo "[process] jiffies for 1 sec: $(( $SYS_END - $SYS_START ))"
echo "[    all] jiffies for 1 sec: $(( $SYS_ALL_END - $SYS_ALL_START ))"
echo "[   cpu%] $SYS %"