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.
7 /* Look for regressions in aggregator code. A more simple access pattern than
10 /* Uses nonblocking collective I/O.*/
18 #include <sys/types.h>
25 static void handle_error(int errcode, const char *str)
27 char msg[MPI_MAX_ERROR_STRING];
29 MPI_Error_string(errcode, msg, &resultlen);
30 fprintf(stderr, "%s: %s\n", str, msg);
31 MPI_Abort(MPI_COMM_WORLD, 1);
34 int main(int argc, char **argv)
36 MPI_Info info = MPI_INFO_NULL;
41 int i, rank, errs = 0, toterrs, buffer[BUFSIZE], buf2[BUFSIZE];
43 const char *filename = NULL;
45 filename = (argc > 1) ? argv[1] : "testfile";
47 MPI_Init(&argc, &argv);
49 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
51 MPI_Info_create(&info);
52 MPI_Info_set(info, "romio_cb_write", "enable");
53 MPI_Info_set(info, "cb_nodes", "1");
55 for (i = 0; i < BUFSIZE; i++) {
56 buffer[i] = 10000 + rank;
58 off = rank * sizeof(buffer);
60 errcode = MPI_File_open(MPI_COMM_WORLD, filename, MPI_MODE_WRONLY | MPI_MODE_CREATE, info, &fh);
61 if (errcode != MPI_SUCCESS)
62 handle_error(errcode, "MPI_File_open");
63 errcode = MPI_File_iwrite_at_all(fh, off, buffer, BUFSIZE, MPI_INT, &request);
64 if (errcode != MPI_SUCCESS)
65 handle_error(errcode, "MPI_File_iwrite_at_all");
66 MPI_Wait(&request, &status);
67 errcode = MPI_File_close(&fh);
68 if (errcode != MPI_SUCCESS)
69 handle_error(errcode, "MPI_File_close");
71 errcode = MPI_File_open(MPI_COMM_WORLD, filename, MPI_MODE_RDONLY, info, &fh);
72 if (errcode != MPI_SUCCESS)
73 handle_error(errcode, "MPI_File_open");
74 errcode = MPI_File_iread_at_all(fh, off, buf2, BUFSIZE, MPI_INT, &request);
75 if (errcode != MPI_SUCCESS)
76 handle_error(errcode, "MPI_File_iread_at_all");
77 MPI_Wait(&request, &status);
78 errcode = MPI_File_close(&fh);
79 if (errcode != MPI_SUCCESS)
80 handle_error(errcode, "MPI_File_close");
82 for (i = 0; i < BUFSIZE; i++) {
83 if (buf2[i] != 10000 + rank)
86 MPI_Allreduce(&errs, &toterrs, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
89 fprintf(stderr, "Found %d errors\n", toterrs);
92 fprintf(stdout, " No Errors\n");