#!/bin/bash
#
# run ust benchmark
#

echo "ust benchmark"

NR_EVENTS=4000000
NR_CPUS=2
echo "using $NR_CPUS processor(s)"
echo "using $NR_EVENTS events per cpu"


rm -f /tmp/bench.txt
# without markers
echo ">running without markers"
#t1=$(/usr/bin/time -f%e usttrace ./bench1 $NR_CPUS $NR_EVENTS 2>&1 1> /dev/null)
t1=$(/usr/bin/time -f%e ./bench1 $NR_CPUS $NR_EVENTS 2>&1 1> /dev/null)
echo " time=$t1 sec"


rm -f /tmp/bench.txt
# with markers
echo ">running with markers activated"
t2=$(/usr/bin/time -f%e usttrace ./bench2 $NR_CPUS $NR_EVENTS 2>&1 1> /dev/null)
echo " time=$t2 sec"


#penalty = t2 - t1
echo
penalty=$(echo "$t2 - $t1;" | bc)
echo "time penalty=$penalty sec"

#event = penalty / (nr_events * nr_cpus)
event=$(echo "scale=10; ($penalty / ($NR_EVENTS * $NR_CPUS));" | bc)
echo "time penalty per event=$event sec"

rm -f /tmp/bench.txt