This bash script runs a time measuring program N times and takes the average (takes the speed up of a reference program). The program will run with different number of threads (1-8). Requires that the program prints a time at the end. Usage: ./multiple_runs.sh [N] [prog] [ref-prog]

multiple_runs.sh

#! /bin/bash
export OMP_NUM_THREADS=1

nparam=$#
runs=$1
app=$2
ref=$3

# Init
tsup=0
teff=0
reftime=1

function calculate {
  tsum=0
  for i in $(seq 1 $runs); do
    out=`./$1`
    t=`expr match "$out" '.*\(.[0-9]*\.[0-9]*\)'`
    tsum=$(echo $tsum + $t | bc)
  done
  tsum=$(echo "scale=2; $tsum/$runs" | bc -l)
  if [ $nparam == 3 ]; then
    tsup=$(echo "scale=2; $reftime/$tsum" | bc -l)
    teff=$(echo "scale=2; $tsup/$OMP_NUM_THREADS" | bc -l)
  fi
}

if [ $nparam == 3 ]; then
  echo "========================"
  echo "Running original program"
  calculate $ref
  reftime=$tsum
  echo "Time: " $tsum "seconds"
fi

for i in {1..8}; do
  echo "========================="
  echo "Running with $i thread(s)"
  OMP_NUM_THREADS=$i
  calculate $app
  echo "Time:" $tsum "seconds"
  if [ $nparam == 3 ]; then
    echo "Speed up:" $tsup
    echo "Efficency:" $teff
  fi
done