2 * MESSAGE PASSING INTERFACE TEST CASE SUITE
4 * Copyright IBM Corp. 1995
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8 *above copyright notice and the following paragraphs appear in all copies.
10 * IBM Corp. makes no representation that the test cases comprising this
11 * suite are correct or are an accurate representation of any standard.
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15 * even if IBM Corp. has been advised of the possibility of such damage.
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18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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21 * ENHANCEMENTS, OR MODIFICATIONS.
22 * ***************************************************************************
27 static int ibm_test(int rank, int size)
39 out = malloc(MAXLEN * 64 * sizeof(int));
40 in = malloc(MAXLEN * sizeof(int));
42 for (j = 1; j <= MAXLEN; j *= 10) {
43 root = (root + 1) % size;
45 for (i = 0; i < j * size; i++)
48 MPI_Scatter(out, j, MPI_INT, in, j, MPI_INT, root, MPI_COMM_WORLD);
50 for (k = 0; k < j; k++) {
51 if (in[k] != k + rank * j) {
53 "task %d bad answer (%d) at index %d k of %d (should be %d)",
54 rank, in[k], k, j, (k + rank * j));
61 MPI_Barrier(MPI_COMM_WORLD);
66 * small test: the root sends a single distinct double to other processes
68 static int small_test(int rank, int size)
72 int sendcount = 1; // one double to each process
75 double *sndbuf = NULL;
77 int root = 0; // arbitrary choice
79 // on root, initialize sendbuf
81 sndbuf = malloc(size * sizeof(double));
82 for (i = 0; i < size; i++) {
83 sndbuf[i] = (double) i;
88 MPI_Scatter(sndbuf, sendcount, MPI_DOUBLE, &rcvd, recvcount,
89 MPI_DOUBLE, root, MPI_COMM_WORLD);
90 if (retval != MPI_SUCCESS) {
91 fprintf(stderr, "(%s:%d) MPI_Scatter() returned retval=%d\n", __FILE__,
96 if ((double) rank != rcvd) {
97 fprintf(stderr, "[%d] has %lf instead of %d\n", rank, rcvd, rank);
105 int main(int argc, char **argv)
110 MPI_Init(&argc, &argv);
111 MPI_Comm_size(MPI_COMM_WORLD, &size);
112 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
116 printf("** Small Test Result: ... \n");
117 if (!small_test(rank, size))
118 printf("\t[%d] failed.\n", rank);
120 printf("\t[%d] ok.\n", rank);
123 MPI_Barrier(MPI_COMM_WORLD);
127 printf("** IBM Test Result: ... \n");
128 if (!ibm_test(rank, size))
129 printf("\t[%d] failed.\n", rank);
131 printf("\t[%d] ok.\n", rank);