TUTORIAL 2 Parallel Processing


Q=1. Program to create n number of child processes from parent process and print process id of them.



int process_Fork(int n)
{
        int i;
        for(i=1;i<n;i++)
        {
                if(fork()==0)
                {
                        return i;
                }
}
return 0;
}
int main()
{
        int id;
        id = process_Fork(3);
        printf("Hello = %d\n ",id);

}

OUTPUT:-

[08ce55@linux ~]$ ./a.out
 Hello = 1
 Hello = 2
 Hello = 0

Q=2. Program to join the processes. N number of processes are forked out from parent process. Parent waits untill child processes finishes their task and terminates a process_join().


#include<stdio.h>

int process_Fork(int n)
{
        int i;
        for(i=1;i<n;i++)
        {
                if(fork()==0)
                {
                        return i;
                }
        }
        return 0;
}
int process_Join(int id, int n)
{
        int i;
        if(id==0)
        {
                for(i=1;i<n;i++)
                {
                        wait(0);
                }
        }
        else
        {
                exit(0);
        }
}
int main()
{
        int id;
        id = process_Fork(3);
        printf("Hello = %d\n ",id);
        process_Join(id,3);
}

  OUTPUT:-

[08ce55@linux ~]$ ./a.out
 Hello = 1
 Hello = 2
 Hello = 0

 

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