1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
3 * (C) 2010 by Argonne National Laboratory.
4 * See COPYRIGHT in top-level directory.
11 /* tests send/recv of a message > 2GB. count=270M, type=long long
12 run with 3 processes to exercise both shared memory and TCP in Nemesis tests*/
14 int main(int argc, char *argv[])
23 MTest_Init(&argc,&argv);
25 /* need large memory */
26 if (sizeof(void *) < 8) {
32 ierr = MPI_Comm_size(MPI_COMM_WORLD,&size);
33 ierr = MPI_Comm_rank(MPI_COMM_WORLD,&rank);
35 fprintf(stderr,"[%d] usage: mpiexec -n 3 %s\n",rank,argv[0]);
36 MPI_Abort(MPI_COMM_WORLD,1);
39 cols = malloc(cnt*sizeof(long long));
41 printf("malloc of >2GB array failed\n");
49 for (i=0; i<cnt; i++) cols[i] = i;
50 /* printf("[%d] sending...\n",rank);*/
51 ierr = MPI_Send(cols,cnt,MPI_LONG_LONG_INT,1,0,MPI_COMM_WORLD);
52 ierr = MPI_Send(cols,cnt,MPI_LONG_LONG_INT,2,0,MPI_COMM_WORLD);
54 /* printf("[%d] receiving...\n",rank); */
55 for (i=0; i<cnt; i++) cols[i] = -1;
56 ierr = MPI_Recv(cols,cnt,MPI_LONG_LONG_INT,0,0,MPI_COMM_WORLD,&status);
57 /* ierr = MPI_Get_count(&status,MPI_LONG_LONG_INT,&cnt);
58 Get_count still fails because status.count is not 64 bit */
59 for (i=0; i<cnt; i++) {
61 /*printf("Rank %d, cols[i]=%lld, should be %d\n", rank, cols[i], i);*/