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.
13 #define DATA_SIZE 324*4
18 static void handle_error(int errcode, const char *str)
20 char msg[MPI_MAX_ERROR_STRING];
22 MPI_Error_string(errcode, msg, &resultlen);
23 fprintf(stderr, "%s: %s\n", str, msg);
24 MPI_Abort(MPI_COMM_WORLD, 1);
27 #define CHECK(fn) { int errcode; errcode = (fn); if (errcode != MPI_SUCCESS) handle_error(errcode, #fn); }
29 int main(int argc, char **argv)
33 MPI_Datatype file_type, mem_type;
36 int data_size = DATA_SIZE;
39 MPI_Aint disp[BLK_COUNT];
40 const char *filename = "unnamed.dat";
42 MPI_Init(&argc, &argv);
43 disp[0] = (MPI_Aint) (PAD);
44 disp[1] = (MPI_Aint) (data_size * 1 + PAD);
45 disp[2] = (MPI_Aint) (data_size * 2 + PAD);
47 data = malloc(data_size);
48 verify = malloc(data_size * BLK_COUNT + HEADER + PAD);
49 for (i = 0; i < data_size / sizeof(int); i++)
52 MPI_Type_create_hindexed_block(BLK_COUNT, data_size, disp, MPI_BYTE, &file_type);
53 MPI_Type_commit(&file_type);
55 MPI_Type_create_hvector(BLK_COUNT, data_size, 0, MPI_BYTE, &mem_type);
56 MPI_Type_commit(&mem_type);
61 CHECK(MPI_File_open(MPI_COMM_WORLD, filename,
62 MPI_MODE_RDWR | MPI_MODE_CREATE | MPI_MODE_DELETE_ON_CLOSE,
63 MPI_INFO_NULL, &fh) != 0);
65 CHECK(MPI_File_set_view(fh, HEADER, MPI_BYTE, file_type, "native", MPI_INFO_NULL));
67 /* write everything */
68 CHECK(MPI_File_write_at_all(fh, 0, data, 1, mem_type, MPI_STATUS_IGNORE));
70 CHECK(MPI_File_set_view(fh, 0, MPI_BYTE, MPI_BYTE, "native", MPI_INFO_NULL));
71 CHECK(MPI_File_read_at_all(fh, 0,
72 verify, (HEADER + PAD + BLK_COUNT * DATA_SIZE) / sizeof(int),
73 MPI_INT, MPI_STATUS_IGNORE));
75 /* header and block padding should have no data */
76 /* for (i = 0; i < (HEADER + PAD) / sizeof(int); i++) {
79 fprintf(stderr, "expected 0, read %d\n", verify[i]);
83 /* blocks are replicated */
84 /* for (j = 0; j < BLK_COUNT; j++) {
85 for (k = 0; k < (DATA_SIZE / sizeof(int)); k++) {
86 if (verify[(HEADER + PAD) / sizeof(int) + k + j * (DATA_SIZE / sizeof(int))] != data[k]) {
88 fprintf(stderr, "expcted %d, read %d\n", data[k],
89 verify[(HEADER + PAD) / sizeof(int) + k + j * (DATA_SIZE / sizeof(int))]);
97 MPI_Type_free(&mem_type);
98 MPI_Type_free(&file_type);
101 printf(" No Errors\n");