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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/* Look for regressions in aggregator code. A more simple access pattern than
* aggregation1 */
#include <mpi.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#define BUFSIZE 512
static void handle_error(int errcode, const char *str)
{
char msg[MPI_MAX_ERROR_STRING];
int resultlen;
MPI_Error_string(errcode, msg, &resultlen);
fprintf(stderr, "%s: %s\n", str, msg);
MPI_Abort(MPI_COMM_WORLD, 1);
}
int main(int argc, char **argv)
{
MPI_Info info = MPI_INFO_NULL;
MPI_File fh;
MPI_Offset off = 0;
MPI_Status status;
int errcode;
int i, rank, errs = 0, toterrs, buffer[BUFSIZE], buf2[BUFSIZE];
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Info_create(&info);
MPI_Info_set(info, "romio_cb_write", "enable");
MPI_Info_set(info, "cb_nodes", "1");
for (i = 0; i < BUFSIZE; i++) {
buffer[i] = 10000 + rank;
}
off = rank * sizeof(buffer);
errcode = MPI_File_open(MPI_COMM_WORLD, argv[1], MPI_MODE_WRONLY | MPI_MODE_CREATE, info, &fh);
if (errcode != MPI_SUCCESS)
handle_error(errcode, "MPI_File_open");
errcode = MPI_File_write_at_all(fh, off, buffer, BUFSIZE, MPI_INT, &status);
if (errcode != MPI_SUCCESS)
handle_error(errcode, "MPI_File_write_at_all");
errcode = MPI_File_close(&fh);
if (errcode != MPI_SUCCESS)
handle_error(errcode, "MPI_File_close");
errcode = MPI_File_open(MPI_COMM_WORLD, argv[1], MPI_MODE_RDONLY, info, &fh);
if (errcode != MPI_SUCCESS)
handle_error(errcode, "MPI_File_open");
errcode = MPI_File_read_at_all(fh, off, buf2, BUFSIZE, MPI_INT, &status);
if (errcode != MPI_SUCCESS)
handle_error(errcode, "MPI_File_read_at_all");
errcode = MPI_File_close(&fh);
if (errcode != MPI_SUCCESS)
handle_error(errcode, "MPI_File_close");
for (i = 0; i < BUFSIZE; i++) {
if (buf2[i] != 10000 + rank)
errs++;
}
MPI_Allreduce(&errs, &toterrs, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
if (rank == 0) {
if (toterrs > 0) {
fprintf(stderr, "Found %d errors\n", toterrs);
} else {
fprintf(stdout, " No Errors\n");
}
}
MPI_Info_free(&info);
MPI_Finalize();
return 0;
}
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