18BCE2182 ASSESS_3 Q4, C (gcc)

18BCE2182 ASSESS_3 Q4

//gcc 7.4.0

#include <stdio.h>
#include <omp.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
int main(void)
{
 int r=3000;
 int c=3000;
 int *arr[r];
 for(int i=0;i<r;i++)
 {
     arr[i]=(int *)malloc(c*sizeof(int));
 }
 for(int i=0;i<r;i++)
 {
     for(int j=0;j<c;j++)
     {
         arr[i][j]=rand();
     }
 }
 printf("\nSequential Time: \n");
 int *arr1[r];
 for(int i=0;i<r;i++)
 {
     arr1[i]=(int *)malloc(c*sizeof(int));
 }
 double start=omp_get_wtime();
 for(int i=0;i<r;i++)
 {
     for(int j=0;j<c;j++)
     {
         arr1[i][j]=arr[j][i];
     }
 }
 double end=omp_get_wtime();
 printf("Execution Time : %f\n",end-start);
 printf("\nParallel Time: \n");
 int *arr2[r];
 for(int i=0;i<r;i++)
 {
     arr2[i]=(int *)malloc(c*sizeof(int));
 }
 double start1=omp_get_wtime();
 int i=0;
 int j=0;
 #pragma omp parallel for
 for(i=0;i<r;i++)
 {
     for(j=0;j<c;j++)
     {
         arr2[i][j]=arr[j][i];
     }
 }
 double end1=omp_get_wtime();
 printf("Execution Time : %f\n",end1-start1);
 printf("\nStatic Schedule Parallel Time: \n");
 start1=omp_get_wtime();
 #pragma omp parallel for schedule(static,16)
 for(i=0;i<r;i++)
 {
     for(j=0;j<c;j++)
     {
         arr2[i][j]=arr[j][i];
     }
 }
 end1=omp_get_wtime();
 printf("Execution Time : %f\n",end1-start1);
 printf("\nDynamic Schedule Parallel Time: \n");
 start1=omp_get_wtime();
 #pragma omp parallel for schedule(dynamic,16)
 for(i=0;i<r;i++)
 {
     for(j=0;j<c;j++)
     {
         arr2[i][j]=arr[j][i];
     }
 }
 end1=omp_get_wtime();
 printf("Execution Time : %f\n",end1-start1);
 printf("\nGuided Schedule Parallel Time: \n");
 start1=omp_get_wtime();
 #pragma omp parallel for schedule(guided,16)
 for(i=0;i<r;i++)
 {
     for(j=0;j<c;j++)
     {
         arr2[i][j]=arr[j][i];
     }
 }
 end1=omp_get_wtime();
 printf("Execution Time : %f\n",end1-start1);
 for(int i=0;i<r;i++)
 {
     free(arr[i]);
 }
 return 0;
}


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