18BCE2182 ASSESS_1 Q2-1, C (gcc)

18BCE2182 ASSESS_1 Q2-1

#include <stdio.h>
#include <stdlib.h>
#include <omp.h>
#define M 5
#define N 5

int main(int argc, char *argv)
{
    int i,j;
    double t;
    double start, end, start_p, end_p;
    double **A;
    
    A= malloc(M*sizeof(double *));
    
    for(i=0; i<M; i++)
    {
        A[i]= malloc(N*sizeof(double));
    }
    for(i=0; i<M; i++)
    {
        for(j=0; j<N; j++)
        {
            A[i][j]=rand();
        }
    }
    start= omp_get_wtime();
    for(i=0; i<M; i++)
    {
        for(j=0; j<N; j++)
        {
            t=A[i][j];
            A[i][j]=A[j][i];
            A[j][i]=t;
        }
    }
    end= omp_get_wtime();
    printf("Serial Execution Time: %f\n\n",(end-start));
    //////////////////////////////////
    start_p= omp_get_wtime();
    #pragma omp parallel for
    for(i=0; i<M; i++)
    {
        for(j=0; j<N; j++)
        {
            t=A[i][j];
            A[i][j]=A[j][i];
            A[j][i]=t;
        }
    }
    end_p= omp_get_wtime();
    printf("Parallel Execution Time: %f\n\n",(end_p-start_p));
    return 0;
}


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