1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
3 * (C) 2014 by Argonne National Laboratory.
4 * See COPYRIGHT in top-level directory.
11 /* tests non-contig 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[])
17 int elems = 270000000;
24 MTest_Init(&argc, &argv);
26 /* need large memory */
27 if (sizeof(void *) < 8) {
33 MPI_Comm_size(MPI_COMM_WORLD, &size);
34 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
36 fprintf(stderr, "[%d] usage: mpiexec -n 3 %s\n", rank, argv[0]);
37 MPI_Abort(MPI_COMM_WORLD, 1);
40 cols = malloc(elems * sizeof(long long));
42 printf("malloc of >2GB array failed\n");
49 MPI_Type_vector(elems / 2, 1, 2, MPI_LONG_LONG_INT, &dtype);
50 MPI_Type_commit(&dtype);
53 for (i = 0; i < elems; i++)
55 /* printf("[%d] sending...\n",rank); */
56 MPI_Send(cols, 1, dtype, 1, 0, MPI_COMM_WORLD);
57 MPI_Send(cols, 1, dtype, 2, 0, MPI_COMM_WORLD);
60 /* printf("[%d] receiving...\n",rank); */
61 for (i = 0; i < elems; i++)
63 MPI_Recv(cols, 1, dtype, 0, 0, MPI_COMM_WORLD, &status);
64 /* MPI_Get_count(&status,MPI_LONG_LONG_INT,&cnt);
65 * Get_count still fails because count is not 64 bit */
66 for (i = 0; i < elems; i++) {
70 printf("Rank %d, cols[i]=%lld, should be %d\n", rank, cols[i], i);
76 MPI_Type_free(&dtype);