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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include "mpitest.h"
/*
static char MTEST_Descrip[] = "Test contig asynchronous I/O";
*/
#define DEFAULT_SIZE (65536)
/* Uses asynchronous I/O. Each process writes to separate files and
reads them back. The file name is taken as a command-line argument,
and the process rank is appended to it.*/
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)
{
int *buf, i, rank, nints, len, err;
char *filename = 0, *tmp;
int errs = 0;
int SIZE = DEFAULT_SIZE;
MPI_File fh;
MPI_Status status;
#ifdef MPIO_USES_MPI_REQUEST
MPI_Request request;
#else
MPIO_Request request;
#endif
MTest_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
/* process 0 takes the file name as a command-line argument and
broadcasts it to other processes */
if (!rank) {
i = 1;
argv++;
/* Skip unrecognized arguments */
while (i < argc) {
if (strcmp(*argv, "-fname") == 0) {
argv++;
i++;
len = (int) strlen(*argv);
filename = (char *) malloc(len + 10);
MTEST_VG_MEM_INIT(filename, (len + 10) * sizeof(char));
strcpy(filename, *argv);
} else if (strcmp(*argv, "-size") == 0) {
argv++;
i++;
SIZE = strtol(*argv, 0, 10);
if (errno) {
fprintf(stderr, "-size requires a numeric argument\n");
MPI_Abort(MPI_COMM_WORLD, 1);
} else if (SIZE <= 0) {
fprintf(stderr, "-size requires a positive value\n");
}
} else {
i++;
argv++;
}
}
if (!filename) {
/* Use a default filename of testfile */
len = 8;
filename = (char *) malloc(len + 10);
MTEST_VG_MEM_INIT(filename, (len + 10) * sizeof(char));
strcpy(filename, "testfile");
}
MPI_Bcast(&len, 1, MPI_INT, 0, MPI_COMM_WORLD);
MPI_Bcast(filename, len + 10, MPI_CHAR, 0, MPI_COMM_WORLD);
MPI_Bcast(&SIZE, 1, MPI_INT, 0, MPI_COMM_WORLD);
} else {
MPI_Bcast(&len, 1, MPI_INT, 0, MPI_COMM_WORLD);
filename = (char *) malloc(len + 10);
MPI_Bcast(filename, len + 10, MPI_CHAR, 0, MPI_COMM_WORLD);
MPI_Bcast(&SIZE, 1, MPI_INT, 0, MPI_COMM_WORLD);
}
/* printf("Starting (size=%d, file=%s)...\n", SIZE, filename); fflush(stdout); */
buf = (int *) malloc(SIZE);
nints = SIZE / sizeof(int);
for (i = 0; i < nints; i++)
buf[i] = rank * 100000 + i;
/* each process opens a separate file called filename.'myrank' */
tmp = (char *) malloc(len + 10);
strcpy(tmp, filename);
sprintf(filename, "%s.%d", tmp, rank);
free(tmp);
err = MPI_File_open(MPI_COMM_SELF, filename, MPI_MODE_CREATE | MPI_MODE_RDWR,
MPI_INFO_NULL, &fh);
if (err != MPI_SUCCESS)
handle_error(err, "MPI_File_open");
err = MPI_File_set_view(fh, 0, MPI_INT, MPI_INT, (char *) "native", MPI_INFO_NULL);
if (err != MPI_SUCCESS)
handle_error(err, "MPI_File_set_view");
err = MPI_File_iwrite(fh, buf, nints, MPI_INT, &request);
if (err != MPI_SUCCESS)
handle_error(err, "MPI_File_iwrtie");
#ifdef MPIO_USES_MPI_REQUEST
MPI_Wait(&request, &status);
#else
MPIO_Wait(&request, &status);
#endif
MPI_File_close(&fh);
/* reopen the file and read the data back */
for (i = 0; i < nints; i++)
buf[i] = 0;
err = MPI_File_open(MPI_COMM_SELF, filename, MPI_MODE_CREATE | MPI_MODE_RDWR,
MPI_INFO_NULL, &fh);
if (err != MPI_SUCCESS)
handle_error(err, "MPI_File_open (read)");
err = MPI_File_set_view(fh, 0, MPI_INT, MPI_INT, (char *) "native", MPI_INFO_NULL);
if (err != MPI_SUCCESS)
handle_error(err, "MPI_File_set_view (read)");
err = MPI_File_iread(fh, buf, nints, MPI_INT, &request);
if (err != MPI_SUCCESS)
handle_error(err, "MPI_File_iread");
#ifdef MPIO_USES_MPI_REQUEST
MPI_Wait(&request, &status);
#else
MPIO_Wait(&request, &status);
#endif
MPI_File_close(&fh);
/* check if the data read is correct */
for (i = 0; i < nints; i++) {
if (buf[i] != (rank * 100000 + i)) {
errs++;
if (errs < 25) {
fprintf(stderr, "Process %d: error, read %d, should be %d\n", rank, buf[i],
rank * 100000 + i);
} else if (errs == 25) {
fprintf(stderr, "Reached maximum number of errors to report\n");
}
}
}
free(buf);
free(filename);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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