1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include <semaphore.h>
#include "mpi.h"
int main( int argc, char **argv )
{
MPI_Comm parent;
MPI_Comm merged;
int rank;
int size;
MPI_Init(&argc, &argv);
printf("Child: launch\n");
MPI_Comm_get_parent(&parent);
MPI_Intercomm_merge(parent, 1, &merged);
MPI_Comm_rank(merged, &rank);
MPI_Comm_size(merged, &size);
printf("Child merged rank = %d, size = %d\n", rank, size);
MPI_Comm_free(&merged);
MPI_Comm_disconnect(&parent);
MPI_Finalize();
printf("Child %d: exiting\n", (int)getpid());
return 0;
}
|
