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Program to do sum of the elements of the array by loop splitting and each process adds its partial sum to the final sum

Posted By: Easy Tutor     Category: C Programming     Views: 5446

Write a program to do sum of the elements of the array by loop splitting and each process adds its partial sum to the final sum (the overhead on the parent is removed)

Code for Program to do sum of the elements of the array by loop splitting and each process adds its partial sum to the final sum in C Programming

/*          Sum of the elements of the array by loop splitting ;     each process adds its partial sum to the final sum     (the overhead on the parent is removed)*/

# include <stdio.h>
# include </usr/include/sys/types.h>
# include </usr/include/sys/shm.h>
# include </usr/include/sys/ipc.h>
# include </usr/include/sys/sem.h>
# include "sharedlib.h"// included in zip
# include "forkjoin.h"// included in zip
# include "spinlock.h"// included in zip
# define NPROC 5
int main()
{
    int arr[10]={1,2,3,4,5,6,7,8,9,10};
    int *FinalSum;
    int id;
    int iCount;
    int shmid;
    int parsum[NPROC];
    int *lock,shmidlock;
    
    FinalSum=(int*)sshared(sizeof(int) * NPROC,&shmid);    
    lock=(int *)sshared(sizeof(int),&shmidlock);
    *FinalSum=0;
    spin_lock_init(lock);
    
    id=process_fork(NPROC);

    parsum[id]=0;

    for(iCount=id;iCount<10;iCount=iCount+NPROC)
    {
        parsum[id]=parsum[id] + arr[iCount];
    }    
    
    printf("\nPartial Sum is of Process: %d is %d",id,parsum[id]);
    
    spin_lock(lock);
        *FinalSum=*FinalSum +parsum[id];
    spin_unlock(lock);    
    process_join(NPROC,id);

    printf("\nFinal Sum is : %d \n",*FinalSum);
    cleanup_memory(&shmid);
    cleanup_memory(&shmidlock);

    return 0;
}
[/Code]
  
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Easy Tutor
Easy Tutor author of Program to do sum of the elements of the array by loop splitting and each process adds its partial sum to the final sum is from United States. Easy Tutor says

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