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assignment4.cu
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Fri, Feb 7, 14:29

assignment4.cu
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/*
============================================================================
Filename : assignment4.c
Author : Arash Pourhabibi
============================================================================
*/
#include <iostream>
#include <iomanip>
#include <fstream>
#include <sys/time.h>
#include <cuda_runtime.h>
using namespace std;
#include "utility.h"
void array_process(double *input, double *output, int length, int iterations);
void GPU_array_process(double *input, double *output, int length, int iterations);
int main (int argc, const char *argv[]) {
int length, iterations;
double time;
if (argc != 3) {
cout<<"Invalid input!"<<endl<<"Usage: ./assignment4 <length> <iterations>"<<endl;
return 1;
} else {
length = atoi(argv[1]);
iterations = atoi(argv[2]);
if(length%2!=0)
{
cout<<"Invalid input!"<<endl<<"Array length must be even"<<endl;
return 1;
}
}
//Allocate arrays
double *input = new double[length*length];
double *output = new double[length*length];
//Reset Device
cudaDeviceReset();
//Initialize the arrays
init(input, length);
init(output, length);
//Start timer
set_clock();
/*Use either the CPU or the GPU functions*/
//CPU Baseline
//Uncomment the block to use the baseline
/*array_process(input, output, length, iterations);
if(iterations%2==0)
{
double *temp;
temp = input;
input = output;
output = temp;
}*/
//GPU function
GPU_array_process(input, output, length, iterations);
//Stop timer
time = elapsed_time();
//Report time required for n iterations
cout<<"Running the algorithm on "<<length<<" by "<<length<<" array for "<<iterations<<" iteration takes "<<setprecision(4)<<time<<"s"<<endl;
//Save array in filelength
save(output, length);
//Free allocated memory
delete[] input;
delete[] output;
return 0;
}

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