Compiles a program with a particular set of inputs, runs multiple times, and then outputs the average of each run to data.csv. The program should submit a single integer to stdout. In this example, the outer loop passes the values 1, 2, 4, 8, etc. (as WORKGROUPSIZE) and the inner loop passes the values 1024, 2048, 4096, etc. (as ARRAYSIZE).

average-script.sh

#!/bin/bash

# Compiles a program with a particular set of inputs, runs multiple times, and then 
# outputs the average of each run. The program should submit a single integer to
# stdout. In this example, the outer loop passes the values 1, 2, 4, 8, etc. (as
# WORKGROUPSIZE) and the inner loop passes the values 1024, 2048, 4096, etc. (as
# ARRAYSIZE). The data is averaged TRIES times and saved to data.csv. Note that as
# this is a bash script, only integer values are computed.
# 
# Run: $ average-script.sh

# Create or clear output file
> data.csv

# Run for multiple tries and compute average
TRIES=10
WORKGROUPCOUNTER=1
while [ $WORKGROUPCOUNTER -le 256 ]
do
	WORKGROUPSIZE=$(( WORKGROUPCOUNTER * 1 ))
	ARRAYCOUNTER=1
	while [ $ARRAYCOUNTER -le 8192 ]
    do
        SUM=0
        ARRAYSIZE=$(( $ARRAYCOUNTER * 1024 ))
        g++ main.cpp -DGLOBAL=${ARRAYSIZE} -DLOCAL=${WORKGROUPSIZE} -o main -lm -fopenmp # may need to be modified
        for TRY in $(seq ${TRIES})
	    do
	        OUTPUT=$(./main)
	        SUM=$(( (SUM + OUTPUT) ))
	    done
        AVG=$(( SUM / TRIES ))
        printf "$AVG" >> data.csv
        printf ',' >> data.csv
        ARRAYCOUNTER=$(( $ARRAYCOUNTER * 2 ))
    done
    echo >> data.csv
	WORKGROUPCOUNTER=$(( $WORKGROUPCOUNTER * 2 ))
done