vchoi_fork

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 * Copyright by The HDF Group.                                               *

 * Copyright by the Board of Trustees of the University of Illinois.         *

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​

/*

 * MPIO independent overlapping writes.

 *

 * First n-1 processes open 1 file.

 * Each of the n-1 process writes chunks of data to the file in round-robin

 * fashion, in a interleaved but not overlapped fashion.  Using increasing

 * chunk sizes for the benefits of testing different write sizes and also

 * reducing the numbers of writes.

 *

 * Last process (n-1) just waits.

 * First n-1 processes finish writing and cloose the file.

 * Last process opens the same file and verifies the data.

 */

​

#include "testpar.h"

​

/* FILENAME and filenames must have the same number of names */

const char *FILENAME[2]={

        "MPItest",

        NULL};

char    filenames[2][200];

int nerrors = 0;

hid_t   fapl;               /* file access property list */

​

/* protocols */

static int errors_sum(int nerrs);

​

#define MPIO_TEST_WRITE_SIZE 1024*1024     /* 1 MB */

​

static int

test_mpio_overlap_writes(char *filename)

{

    int mpi_size, mpi_rank;

    MPI_Comm comm;

    MPI_Info info = MPI_INFO_NULL;

    int color, mrc;