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tools/test/h5ls/CMakeTestsVDS.cmake

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Author: Albert Cheng of NCSA, Oct 24, 2001.
 */

#include "hdf5.h"

#ifdef H5_STDC_HEADERS
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#endif

#ifdef H5_HAVE_UNISTD_H
#include <sys/types.h>
#include <unistd.h>
#endif

#ifdef H5_HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif

#ifdef H5_HAVE_PARALLEL

#include <mpi.h>

#ifndef MPI_FILE_NULL           /*MPIO may be defined in mpi.h already       */
#   include <mpio.h>
#endif  /* !MPI_FILE_NULL */

#include "pio_perf.h"

/* Macro definitions */

#if H5_VERS_MAJOR == 1 && H5_VERS_MINOR == 6
#    define H5DCREATE(fd, name, type, space, dcpl)    H5Dcreate(fd, name, type, space, dcpl)
#    define H5DOPEN(fd, name)                         H5Dopen(fd, name)
#else
#    define H5DCREATE(fd, name, type, space, dcpl)    H5Dcreate2(fd, name, type, space, H5P_DEFAULT, dcpl, H5P_DEFAULT)
#    define H5DOPEN(fd, name)                         H5Dopen2(fd, name, H5P_DEFAULT)
#endif

/* sizes of various items. these sizes won't change during program execution */
/* The following three must have the same type */
#define ELMT_SIZE           (sizeof(unsigned char))     /* we're doing bytes */
#define ELMT_MPI_TYPE       MPI_BYTE
#define ELMT_H5_TYPE        H5T_NATIVE_UCHAR

#define GOTOERROR(errcode)  { ret_code = errcode; goto done; }
#define GOTODONE        { goto done; }
#define ERRMSG(mesg) {                                                  \
    fprintf(stderr, "Proc %d: ", pio_mpi_rank_g);                       \
    fprintf(stderr, "*** Assertion failed (%s) at line %4d in %s\n",    \
        mesg, (int)__LINE__, __FILE__);                             \
}

#define MSG(mesg) {                                     \
    fprintf(stderr, "Proc %d: ", pio_mpi_rank_g);       \
    fprintf(stderr, "(%s) at line %4d in %s\n",         \
        mesg, (int)__LINE__, __FILE__);             \
}

/* verify: if val is false (0), print mesg. */
#define VRFY(val, mesg) do {                            \
    if (!val) {                                         \
    ERRMSG(mesg);                                   \
    GOTOERROR(FAIL);                                \
    }                                                   \
} while(0)


/* POSIX I/O macros */
#define POSIXCREATE(fn)           HDopen(fn, O_CREAT|O_TRUNC|O_RDWR, 0600)
#define POSIXOPEN(fn, F)          HDopen(fn, F, 0600)
#define POSIXCLOSE(F)             HDclose(F)
#define POSIXSEEK(F,L)            HDlseek(F, L, SEEK_SET)
#define POSIXWRITE(F,B,S)         HDwrite(F,B,S)
#define POSIXREAD(F,B,S)          HDread(F,B,S)

enum {
    PIO_CREATE = 1,
    PIO_WRITE = 2,
    PIO_READ = 4
};

/* Global variables */
static int  clean_file_g = -1;  /*whether to cleanup temporary test     */
/*files. -1 is not defined;             */
/*0 is no cleanup; 1 is do cleanup      */

/*
 * In a parallel machine, the filesystem suitable for compiling is
 * unlikely a parallel file system that is suitable for parallel I/O.
 * There is no standard pathname for the parallel file system.  /tmp
 * is about the best guess.
 */
#ifndef HDF5_PARAPREFIX
#    define HDF5_PARAPREFIX     ""
#endif  /* !HDF5_PARAPREFIX */

#ifndef MIN
#   define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif  /* !MIN */

/* the different types of file descriptors we can expect */
typedef union _file_descr {
    int         posixfd;    /* POSIX file handle*/
    MPI_File    mpifd;      /* MPI file         */
    hid_t       h5fd;       /* HDF5 file        */
} file_descr;

/* local functions */
static char  *pio_create_filename(iotype iot, const char *base_name,
    char *fullname, size_t size);
static herr_t do_write(results *res, file_descr *fd, parameters *parms,
    long ndsets, off_t nelmts, size_t buf_size, void *buffer);
static herr_t do_read(results *res, file_descr *fd, parameters *parms,
    long ndsets, off_t nelmts, size_t buf_size, void *buffer /*out*/);
static herr_t do_fopen(parameters *param, char *fname, file_descr *fd /*out*/,
    int flags);
static herr_t do_fclose(iotype iot, file_descr *fd);
static void do_cleanupfile(iotype iot, char *fname);

/*
 * Function:        do_pio
 * Purpose:         PIO Engine where Parallel IO are executed.
 * Return:          results
 * Programmer:      Albert Cheng, Bill Wendling 2001/12/12
 * Modifications:
 *  Added 2D testing (Christian Chilan, 10. August 2005)
 */
    results
do_pio(parameters param)
{
    /* return codes */
    herr_t      ret_code = 0;   /*return code                           */
    results     res;

    file_descr  fd;
    iotype      iot;

    char        fname[FILENAME_MAX];
    long    nf;
    long        ndsets;
    off_t       nbytes;         /*number of bytes per dataset  */
    off_t   snbytes;    /*general dataset size          */
                                /*for 1D, it is the actual dataset size */
                                /*for 2D, it is the size of a side of the dataset square */
    char        *buffer = NULL; /*data buffer pointer           */
    size_t      buf_size;       /*general buffer size in bytes     */
                                /*for 1D, it is the actual buffer size */
                                /*for 2D, it is the length of the buffer rectangle */
    size_t      blk_size;       /*data block size in bytes      */
    size_t  bsize;      /*actual buffer size            */

    /* HDF5 variables */
    herr_t          hrc;        /*HDF5 return code              */

    /* Sanity check parameters */

    /* IO type */
    iot = param.io_type;

    switch (iot) {
        case MPIO:
            fd.mpifd = MPI_FILE_NULL;
            res.timers = io_time_new(MPI_CLOCK);
            break;
        case POSIXIO:
            fd.posixfd = -1;
            res.timers = io_time_new(MPI_CLOCK);
            break;
        case PHDF5:
            fd.h5fd = -1;
            res.timers = io_time_new(MPI_CLOCK);
            break;
        default:
            /* unknown request */
            fprintf(stderr, "Unknown IO type request (%d)\n", iot);
            GOTOERROR(FAIL);
    }

    ndsets = param.num_dsets;       /* number of datasets per file          */
    nbytes = param.num_bytes;       /* number of bytes per dataset          */
    buf_size = param.buf_size;
    blk_size = param.blk_size;

    if (!param.dim2d){
        snbytes = nbytes;   /* General dataset size     */
        bsize = buf_size;   /* Actual buffer size       */
    }
    else {
        snbytes = (off_t)sqrt(nbytes);  /* General dataset size     */
        bsize = buf_size * blk_size;    /* Actual buffer size       */
    }

    if (param.num_files < 0 ) {
    fprintf(stderr,
        "number of files must be >= 0 (%ld)\n",
        param.num_files);
    GOTOERROR(FAIL);
    }

    if (ndsets < 0 ) {
    fprintf(stderr,
        "number of datasets per file must be >= 0 (%ld)\n",
        ndsets);
    GOTOERROR(FAIL);
    }

    if (param.num_procs <= 0 ) {
    fprintf(stderr,
        "maximum number of process to use must be > 0 (%d)\n",
        param.num_procs);
    GOTOERROR(FAIL);
    }

    /* Validate transfer buffer size & block size*/
    if(blk_size<=0) {
    HDfprintf(stderr,
        "Transfer block size (%zu) must be > 0\n", blk_size);
    GOTOERROR(FAIL);
    }
    if(buf_size<=0) {
    HDfprintf(stderr,
        "Transfer buffer size (%zu) must be > 0\n", buf_size);
    GOTOERROR(FAIL);
    }
    if ((buf_size % blk_size) != 0){
    HDfprintf(stderr,
        "Transfer buffer size (%zu) must be a multiple of the "
        "interleaved I/O block size (%zu)\n",
        buf_size, blk_size);
    GOTOERROR(FAIL);
    }
    if((snbytes%pio_mpi_nprocs_g)!=0) {
    HDfprintf(stderr,
              "Dataset size (%" H5_PRINTF_LL_WIDTH "d) must be a multiple of the "
              "number of processes (%d)\n",
              (long long)snbytes, pio_mpi_nprocs_g);
    GOTOERROR(FAIL);
    }

    if (!param.dim2d){
        if(((snbytes/pio_mpi_nprocs_g)%buf_size)!=0) {
        HDfprintf(stderr,
            "Dataset size/process (%" H5_PRINTF_LL_WIDTH "d) must be a multiple of the "
            "trasfer buffer size (%zu)\n",
            (long long)(snbytes/pio_mpi_nprocs_g), buf_size);
        GOTOERROR(FAIL);
        }
    }
    else {
        if((snbytes%buf_size)!=0) {
        HDfprintf(stderr,
            "Dataset side size (%" H5_PRINTF_LL_WIDTH "d) must be a multiple of the "
            "trasfer buffer size (%zu)\n",
            (long long)snbytes, buf_size);
        GOTOERROR(FAIL);
        }
    }

    /* Allocate transfer buffer */
    if ((buffer = malloc(bsize)) == NULL){
    HDfprintf(stderr, "malloc for transfer buffer size (%zu) failed\n",
        bsize);
    GOTOERROR(FAIL);
    }

    if (pio_debug_level >= 4) {
    int myrank;

    MPI_Comm_rank(pio_comm_g, &myrank);

    /* output all of the times for all iterations */
    if (myrank == 0)
        fprintf(output, "Timer details:\n");
    }

    for (nf = 1; nf <= param.num_files; nf++) {
    /*
     * Write performance measurement
     */
    /* Open file for write */
    char base_name[256];

    sprintf(base_name, "#pio_tmp_%lu", nf);
    pio_create_filename(iot, base_name, fname, sizeof(fname));
    if (pio_debug_level > 0)
        HDfprintf(output, "rank %d: data filename=%s\n",
            pio_mpi_rank_g, fname);

    /* Need barrier to make sure everyone starts at the same time */
    MPI_Barrier(pio_comm_g);

    set_time(res.timers, HDF5_GROSS_WRITE_FIXED_DIMS, TSTART);
    hrc = do_fopen(&param, fname, &fd, PIO_CREATE | PIO_WRITE);

    VRFY((hrc == SUCCESS), "do_fopen failed");

    set_time(res.timers, HDF5_FINE_WRITE_FIXED_DIMS, TSTART);
    hrc = do_write(&res, &fd, &param, ndsets, nbytes, buf_size, buffer);
    hrc == SUCCESS;
    set_time(res.timers, HDF5_FINE_WRITE_FIXED_DIMS, TSTOP);

    VRFY((hrc == SUCCESS), "do_write failed");

    /* Close file for write */
    hrc = do_fclose(iot, &fd);

    set_time(res.timers, HDF5_GROSS_WRITE_FIXED_DIMS, TSTOP);
    VRFY((hrc == SUCCESS), "do_fclose failed");

    if (!param.h5_write_only) {
        /*
         * Read performance measurement
         */
        /* Need barrier to make sure everyone is done writing and has
         * closed the file.  Also to make sure everyone starts reading
         * at the same time.
         */
        MPI_Barrier(pio_comm_g);

        /* Open file for read */
        set_time(res.timers, HDF5_GROSS_READ_FIXED_DIMS, TSTART);
        hrc = do_fopen(&param, fname, &fd, PIO_READ);

        VRFY((hrc == SUCCESS), "do_fopen failed");

        set_time(res.timers, HDF5_FINE_READ_FIXED_DIMS, TSTART);
        hrc = do_read(&res, &fd, &param, ndsets, nbytes, buf_size, buffer);
        set_time(res.timers, HDF5_FINE_READ_FIXED_DIMS, TSTOP);
        VRFY((hrc == SUCCESS), "do_read failed");

        /* Close file for read */
        hrc = do_fclose(iot, &fd);

        set_time(res.timers, HDF5_GROSS_READ_FIXED_DIMS, TSTOP);
        VRFY((hrc == SUCCESS), "do_fclose failed");
    }

    /* Need barrier to make sure everyone is done with the file */
    /* before it may be removed by do_cleanupfile */
    MPI_Barrier(pio_comm_g);
    do_cleanupfile(iot, fname);
    }

done:
    /* clean up */
    /* release HDF5 objects */

    /* close any opened files */
    /* no remove(fname) because that should have happened normally. */
    switch (iot) {
        case POSIXIO:
            if (fd.posixfd != -1)
            hrc = do_fclose(iot, &fd);
            break;
        case MPIO:
            if (fd.mpifd != MPI_FILE_NULL)
            hrc = do_fclose(iot, &fd);
            break;
        case PHDF5:
            if (fd.h5fd != -1)
            hrc = do_fclose(iot, &fd);
            break;
    }

    /* release generic resources */
    if(buffer)
    free(buffer);
    res.ret_code = ret_code;
    return res;
}

/*
 * Function:    pio_create_filename
 * Purpose:     Create a new filename to write to. Determine the correct
 *              suffix to append to the filename by the type of I/O we're
 *              doing. Also, place in the /tmp/{$USER,$LOGIN} directory if
 *              USER or LOGIN are specified in the environment.
 * Return:      Pointer to filename or NULL
 * Programmer:  Bill Wendling, 21. November 2001
 * Modifications:
 */
    static char *
pio_create_filename(iotype iot, const char *base_name, char *fullname, size_t size)
{
    const char *prefix, *suffix = "";
    char *ptr, last = '\0';
    size_t i, j;

    if (!base_name || !fullname || size < 1)
        return NULL;

    HDmemset(fullname, 0, size);

    switch (iot) {
        case POSIXIO:
            suffix = ".posix";
            break;
        case MPIO:
            suffix = ".mpio";
            break;
        case PHDF5:
            suffix = ".h5";
            break;
    }

    /* First use the environment variable and then try the constant */
    prefix = HDgetenv("HDF5_PARAPREFIX");

#ifdef HDF5_PARAPREFIX
    if (!prefix)
        prefix = HDF5_PARAPREFIX;
#endif  /* HDF5_PARAPREFIX */

    /* Prepend the prefix value to the base name */
    if (prefix && *prefix) {
        /* If the prefix specifies the HDF5_PARAPREFIX directory, then
         * default to using the "/tmp/$USER" or "/tmp/$LOGIN"
         * directory instead. */
        register char *user, *login, *subdir;

        user = HDgetenv("USER");
        login = HDgetenv("LOGIN");
        subdir = (user ? user : login);

        if (subdir) {
            for (i = 0; i < size-1 && prefix[i]; i++)
                fullname[i] = prefix[i];

            fullname[i++] = '/';

            for (j = 0; i < size && subdir[j]; i++, j++)
                fullname[i] = subdir[j];
        }
        else {
            /* We didn't append the prefix yet */
            HDstrncpy(fullname, prefix, size);
            fullname[size - 1] = '\0';
        }

        if ((HDstrlen(fullname) + HDstrlen(base_name) + 1) < size) {
            /* Append the base_name with a slash first. Multiple slashes are
             * handled below. */
            h5_stat_t buf;

            if (HDstat(fullname, &buf) < 0)
                /* The directory doesn't exist just yet */
                if (HDmkdir(fullname, (mode_t) 0755) < 0 && errno != EEXIST) {
                    /* We couldn't make the "/tmp/${USER,LOGIN}" subdirectory.
                     * Default to PREFIX's original prefix value. */
                    HDstrcpy(fullname, prefix);
                }

            HDstrcat(fullname, "/");
            HDstrcat(fullname, base_name);
        }
        else {
            /* Buffer is too small */
            return NULL;
        }
    }
    else if (HDstrlen(base_name) >= size) {
        /* Buffer is too small */
        return NULL;
    }
    else {
        HDstrcpy(fullname, base_name);
    }

    /* Append a suffix */
    if (suffix) {
        if (HDstrlen(fullname) + HDstrlen(suffix) >= size)
            return NULL;

        HDstrcat(fullname, suffix);
    }

    /* Remove any double slashes in the filename */
    for (ptr = fullname, i = j = 0; ptr && i < size; i++, ptr++) {
        if (*ptr != '/' || last != '/')
            fullname[j++] = *ptr;

        last = *ptr;
    }

    return fullname;
}

/*
 * Function:        do_write
 * Purpose:         Write the required amount of data to the file.
 * Return:          SUCCESS or FAIL
 * Programmer:      Albert Cheng, Bill Wendling, 2001/12/13
 * Modifications:
 *  Added 2D testing (Christian Chilan, 10. August 2005)
 */
    static herr_t
do_write(results *res, file_descr *fd, parameters *parms, long ndsets,
    off_t nbytes, size_t buf_size, void *buffer)
{
    int         ret_code = SUCCESS;
    int         rc;             /*routine return code                   */
    long        ndset;
    size_t      blk_size;       /* The block size to subdivide the xfer buffer into */
    off_t       nbytes_xfer;    /* Total number of bytes transferred so far */
    size_t      nbytes_xfer_advance; /* Number of bytes transferred in a single I/O operation */
    size_t      nbytes_toxfer;  /* Number of bytes to transfer a particular time */
    char        dname[64];
    off_t       dset_offset=0;  /*dataset offset in a file              */
    off_t       bytes_begin[2];    /*first elmt this process transfer      */
    off_t       bytes_count;    /*number of elmts this process transfer */
    off_t       snbytes=0;  /*size of a side of the dataset square  */
    unsigned char *buf_p;       /* Current buffer pointer               */

    /* POSIX variables */
    off_t       file_offset;    /* File offset of the next transfer     */
    off_t       file_offset_advance;    /* File offset advance after each I/O operation */
    off_t       posix_file_offset;    /* Base file offset of the next transfer      */

    /* MPI variables */
    MPI_Offset  mpi_file_offset;    /* Base file offset of the next transfer*/
    MPI_Offset  mpi_offset;         /* Offset in MPI file                   */
    MPI_Offset  mpi_offset_advance; /* Offset advance after each I/O operation */
    MPI_Datatype mpi_file_type;     /* MPI derived type for 1D file            */
    MPI_Datatype mpi_blk_type;      /* MPI derived type for 1D buffer          */
    MPI_Datatype mpi_cont_type;     /* MPI derived type for 2D contiguous file */
    MPI_Datatype mpi_partial_buffer_cont;       /* MPI derived type for partial 2D contiguous buffer */
    MPI_Datatype mpi_inter_type;    /* MPI derived type for 2D interleaved file  */
    MPI_Datatype mpi_partial_buffer_inter;      /* MPI derived type for partial 2D interleaved buffer */
    MPI_Datatype mpi_full_buffer;       /* MPI derived type for 2D full buffer */
    MPI_Datatype mpi_full_chunk;        /* MPI derived type for 2D full chunk */
    MPI_Datatype mpi_chunk_inter_type;  /* MPI derived type for 2D chunk interleaved file */
    MPI_Datatype mpi_collective_type;   /* Generic MPI derived type for 2D collective access */
    MPI_Status  mpi_status;
    int         mrc;                /* MPI return code                      */

    /* HDF5 variables */
    herr_t      hrc;                    /*HDF5 return code              */
    hsize_t     h5dims[2];              /*dataset dim sizes             */
    hid_t       h5dset_space_id = -1;   /*dataset space ID              */
    hid_t       h5mem_space_id = -1;    /*memory dataspace ID           */
    hid_t       h5ds_id = -1;           /*dataset handle                */
    hsize_t     h5block[2];     /*dataspace selection           */
    hsize_t     h5stride[2];
    hsize_t     h5count[2];
    hsize_t     h5start[2];
    hssize_t    h5offset[2];            /* Selection offset within dataspace */
    hid_t       h5dcpl = -1;            /* Dataset creation property list */
    hid_t       h5dxpl = -1;            /* Dataset transfer property list */

    /* Get the parameters from the parameter block */
    blk_size=parms->blk_size;

    /* There are two kinds of transfer patterns, contiguous and interleaved.
     * Let 0,1,2,...,n be data accessed by process 0,1,2,...,n
     *     where n is rank of the last process.
     * In contiguous pattern, data are accessed as
     *    000...111...222...nnn...
     * In interleaved pattern, data are accessed as
     *    012...n012...n...
     * These are all in the scope of one dataset.
     */

    /* 1D dataspace */
    if (!parms->dim2d){
        /* Contiguous Pattern: */
        if (!parms->interleaved) {
            bytes_begin[0] = (off_t)(((double)nbytes*pio_mpi_rank_g)/pio_mpi_nprocs_g);
        } /* end if */
        /* Interleaved Pattern: */
        else {
            bytes_begin[0] = (off_t)(blk_size*pio_mpi_rank_g);
        } /* end else */

        /* Prepare buffer for verifying data */
        if (parms->verify)
            memset(buffer,pio_mpi_rank_g+1,buf_size);
    }/* end if */
    /* 2D dataspace */
    else {
        /* nbytes is always the number of bytes per dataset (1D or 2D). If the
           dataspace is 2D, snbytes is the size of a side of the dataset square.
         */
        snbytes = (off_t)sqrt(nbytes);

        /* Contiguous Pattern: */
        if (!parms->interleaved) {
            bytes_begin[0] = (off_t)((double)snbytes*pio_mpi_rank_g / pio_mpi_nprocs_g);
            bytes_begin[1] = 0;
        } /* end if */
        /* Interleaved Pattern: */
        else {
            bytes_begin[0] = 0;

            if(!parms->h5_use_chunks || parms->io_type==PHDF5)
                bytes_begin[1] = (off_t)(blk_size*pio_mpi_rank_g);
            else
                bytes_begin[1] = (off_t)(blk_size*blk_size*pio_mpi_rank_g);
        } /* end else */

        /* Prepare buffer for verifying data */
        if (parms->verify)
            memset(buffer,pio_mpi_rank_g+1,buf_size*blk_size);
    } /* end else */


    /* Calculate the total number of bytes (bytes_count) to be
     * transferred by this process. It may be different for different
     * transfer pattern due to rounding to integral values.
     */
    /*
     * Calculate the beginning bytes of this process and the next.
     * bytes_count is the difference between these two beginnings.
     * This way, it eliminates any rounding errors.
     * (This is tricky, don't mess with the formula, rounding errors
     * can easily get introduced) */
    bytes_count = (off_t)(((double)nbytes*(pio_mpi_rank_g+1)) / pio_mpi_nprocs_g)
    - (off_t)(((double)nbytes*pio_mpi_rank_g) / pio_mpi_nprocs_g);

    /* debug */
    if (pio_debug_level >= 4) {
        HDprint_rank(output);
        if (!parms->dim2d) {
        HDfprintf(output, "Debug(do_write): "
            "buf_size=%zu, bytes_begin=%" H5_PRINTF_LL_WIDTH "d, bytes_count=%" H5_PRINTF_LL_WIDTH "d\n",
            buf_size, (long long)bytes_begin[0],
            (long long)bytes_count);
        } else {
        HDfprintf(output, "Debug(do_write): "
            "linear buf_size=%zu, bytes_begin=(%" H5_PRINTF_LL_WIDTH "d,%" H5_PRINTF_LL_WIDTH "d), bytes_count=%" H5_PRINTF_LL_WIDTH "d\n",
            buf_size*blk_size, (long long)bytes_begin[0],
            (long long)bytes_begin[1], (long long)bytes_count);
        }
    }

    /* I/O Access specific setup */
    switch (parms->io_type) {
    case POSIXIO:
        /* No extra setup */
        break;

    case MPIO: /* MPI-I/O setup */
        /* 1D dataspace */
        if (!parms->dim2d){
            /* Build block's derived type */
            mrc = MPI_Type_contiguous((int)blk_size,
                MPI_BYTE, &mpi_blk_type);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Build file's derived type */
            mrc = MPI_Type_vector((int)(buf_size/blk_size), (int)1,
                (int)pio_mpi_nprocs_g, mpi_blk_type, &mpi_file_type);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Commit file type */
            mrc = MPI_Type_commit( &mpi_file_type );
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");

            /* Commit buffer type */
            mrc = MPI_Type_commit( &mpi_blk_type );
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");
        } /* end if */
        /* 2D dataspace */
        else {
            /* Build partial buffer derived type for contiguous access */

            mrc = MPI_Type_contiguous((int)buf_size, MPI_BYTE,
                &mpi_partial_buffer_cont);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Commit partial buffer derived type */
            mrc = MPI_Type_commit(&mpi_partial_buffer_cont);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");

            /* Build contiguous file's derived type */
            mrc = MPI_Type_vector((int)blk_size, (int)1, (int)(snbytes/buf_size),
                mpi_partial_buffer_cont, &mpi_cont_type);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Commit contiguous file type */
            mrc = MPI_Type_commit(&mpi_cont_type);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");

            /* Build partial buffer derived type for interleaved access */
            mrc = MPI_Type_contiguous((int)blk_size, MPI_BYTE,
                &mpi_partial_buffer_inter);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Commit partial buffer derived type */
            mrc = MPI_Type_commit(&mpi_partial_buffer_inter);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");

            /* Build interleaved file's derived type */
            mrc = MPI_Type_vector((int)buf_size, (int)1, (int)(snbytes/blk_size),
                mpi_partial_buffer_inter, &mpi_inter_type);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Commit interleaved file type */
            mrc = MPI_Type_commit(&mpi_inter_type);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");

            /* Build full buffer derived type */
            mrc = MPI_Type_contiguous((int)(blk_size*buf_size), MPI_BYTE,
                &mpi_full_buffer);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Commit full buffer derived type */
            mrc = MPI_Type_commit(&mpi_full_buffer);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");

            /* Build full chunk derived type */
            mrc = MPI_Type_contiguous((int)(blk_size*blk_size), MPI_BYTE,
                &mpi_full_chunk);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Commit full chunk derived type */
            mrc = MPI_Type_commit(&mpi_full_chunk);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");

            /* Build chunk interleaved file's derived type */
            mrc = MPI_Type_vector((int)(buf_size/blk_size), (int)1, (int)(snbytes/blk_size),
                mpi_full_chunk, &mpi_chunk_inter_type);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_CREATE");

            /* Commit chunk interleaved file type */
            mrc = MPI_Type_commit(&mpi_chunk_inter_type);
            VRFY((mrc==MPI_SUCCESS), "MPIO_TYPE_COMMIT");

        } /* end else */
        break;

    case PHDF5: /* HDF5 setup */
        /* 1D dataspace */
        if (!parms->dim2d){
            if(nbytes>0) {
                /* define a contiguous dataset of nbytes native bytes */
                h5dims[0] = nbytes;
                h5dset_space_id = H5Screate_simple(1, h5dims, NULL);
                VRFY((h5dset_space_id >= 0), "H5Screate_simple");

                /* Set up the file dset space id to select the pattern to access */
                if (!parms->interleaved){
                /* Contiguous pattern */
                h5start[0] = bytes_begin[0];
                h5stride[0] = h5block[0] = blk_size;
                h5count[0] = buf_size/blk_size;
                } /* end if */
                else {
                /* Interleaved access pattern */
                /* Skip offset over blocks of other processes */
                h5start[0] = bytes_begin[0];
                h5stride[0] = blk_size*pio_mpi_nprocs_g;
                h5block[0] = blk_size;
                h5count[0] = buf_size/blk_size;
                } /* end else */
                hrc = H5Sselect_hyperslab(h5dset_space_id, H5S_SELECT_SET,
                    h5start, h5stride, h5count, h5block);
                VRFY((hrc >= 0), "H5Sselect_hyperslab");
            } /* end if */
            else {
                h5dset_space_id = H5Screate(H5S_SCALAR);
                VRFY((h5dset_space_id >= 0), "H5Screate");
            } /* end else */

            /* Create the memory dataspace that corresponds to the xfer buffer */
            if(buf_size>0) {
                h5dims[0] = buf_size;
                h5mem_space_id = H5Screate_simple(1, h5dims, NULL);
                VRFY((h5mem_space_id >= 0), "H5Screate_simple");
            } /* end if */
            else {
                h5mem_space_id = H5Screate(H5S_SCALAR);
                VRFY((h5mem_space_id >= 0), "H5Screate");
            } /* end else */
        } /* end if */
        /* 2D dataspace */
        else {
            if(nbytes>0) {
                /* define a contiguous dataset of nbytes native bytes */
                h5dims[0] = snbytes;
                h5dims[1] = snbytes;
                h5dset_space_id = H5Screate_simple(2, h5dims, NULL);
                VRFY((h5dset_space_id >= 0), "H5Screate_simple");

                /* Set up the file dset space id to select the pattern to access */
                if (!parms->interleaved){
                /* Contiguous pattern */
                h5start[0] = bytes_begin[0];
                h5start[1] = bytes_begin[1];
                h5stride[0] = 1;
                h5stride[1] = h5block[0] = h5block[1] = blk_size;
                h5count[0] = 1;
                h5count[1] = buf_size/blk_size;
                } /* end if */
                else {
                /* Interleaved access pattern */
                /* Skip offset over blocks of other processes */
                h5start[0] = bytes_begin[0];
                h5start[1] = bytes_begin[1];
                h5stride[0] = blk_size;
                h5stride[1] = blk_size*pio_mpi_nprocs_g;
                h5block[0] = h5block[1] = blk_size;
                h5count[0] = buf_size/blk_size;
                h5count[1] = 1;
                } /* end else */
                hrc = H5Sselect_hyperslab(h5dset_space_id, H5S_SELECT_SET,
                    h5start, h5stride, h5count, h5block);
                VRFY((hrc >= 0), "H5Sselect_hyperslab");
            } /* end if */
            else {
                h5dset_space_id = H5Screate(H5S_SCALAR);
                VRFY((h5dset_space_id >= 0), "H5Screate");
            } /* end else */

            /* Create the memory dataspace that corresponds to the xfer buffer */
            if(buf_size>0) {
                if (!parms->interleaved){
                h5dims[0] = blk_size;
                h5dims[1] = buf_size;
                }else{
                h5dims[0] = buf_size;
                h5dims[1] = blk_size;
                }
                h5mem_space_id = H5Screate_simple(2, h5dims, NULL);
                VRFY((h5mem_space_id >= 0), "H5Screate_simple");
            } /* end if */
            else {
                h5mem_space_id = H5Screate(H5S_SCALAR);
                VRFY((h5mem_space_id >= 0), "H5Screate");
            } /* end else */
        } /* end else */

        /* Create the dataset transfer property list */
        h5dxpl = H5Pcreate(H5P_DATASET_XFER);
        if (h5dxpl < 0) {
        fprintf(stderr, "HDF5 Property List Create failed\n");
        GOTOERROR(FAIL);
        }

        /* Change to collective I/O, if asked */
        if(parms->collective) {
            hrc = H5Pset_dxpl_mpio(h5dxpl, H5FD_MPIO_COLLECTIVE);
            if (hrc < 0) {
                fprintf(stderr, "HDF5 Property List Set failed\n");
                GOTOERROR(FAIL);
            } /* end if */
        } /* end if */
        break;
    } /* end switch */

    for (ndset = 1; ndset <= ndsets; ++ndset) {

    /* Calculate dataset offset within a file */

    /* create dataset */
    switch (parms->io_type) {
        case POSIXIO:
        case MPIO:
            /* both posix and mpi io just need dataset offset in file*/
            dset_offset = (ndset - 1) * nbytes;
            break;

        case PHDF5:
            h5dcpl = H5Pcreate(H5P_DATASET_CREATE);
            if (h5dcpl < 0) {
                fprintf(stderr, "HDF5 Property List Create failed\n");
                GOTOERROR(FAIL);
            }
            /* 1D dataspace */
            if (!parms->dim2d){
                /* Make the dataset chunked if asked */
                if(parms->h5_use_chunks) {
                /* Set the chunk size to be the same as the buffer size */
                h5dims[0] = blk_size;
                hrc = H5Pset_chunk(h5dcpl, 1, h5dims);
                if (hrc < 0) {
                    fprintf(stderr, "HDF5 Property List Set failed\n");
                    GOTOERROR(FAIL);
                } /* end if */
                } /* end if */
            }/* end if */
            else{
                /* 2D dataspace */
                if(parms->h5_use_chunks) {
                /* Set the chunk size to be the same as the block size */
                h5dims[0] = blk_size;
                h5dims[1] = blk_size;
                hrc = H5Pset_chunk(h5dcpl, 2, h5dims);
                if (hrc < 0) {
                    fprintf(stderr, "HDF5 Property List Set failed\n");
                    GOTOERROR(FAIL);
                } /* end if */
                } /* end if */
            }/* end else */

            sprintf(dname, "Dataset_%ld", ndset);
            h5ds_id = H5DCREATE(fd->h5fd, dname, ELMT_H5_TYPE,
                h5dset_space_id, h5dcpl);

            if (h5ds_id < 0) {
                fprintf(stderr, "HDF5 Dataset Create failed\n");
                GOTOERROR(FAIL);
            }

            hrc = H5Pclose(h5dcpl);
            /* verifying the close of the dcpl */
            if (hrc < 0) {
                fprintf(stderr, "HDF5 Property List Close failed\n");
                GOTOERROR(FAIL);
            }
            break;
    }

    /* The task is to transfer bytes_count bytes, starting at
     * bytes_begin position, using transfer buffer of buf_size bytes.
     * If interleaved, select buf_size at a time, in round robin
     * fashion, according to number of process. Otherwise, select
     * all bytes_count in contiguous.
     */
    nbytes_xfer = 0 ;

    /* 1D dataspace */
    if (!parms->dim2d){
        /* Set base file offset for all I/O patterns and POSIX access */
        posix_file_offset = dset_offset + bytes_begin[0];

        /* Set base file offset for all I/O patterns and MPI access */
        mpi_file_offset = (MPI_Offset)(dset_offset + bytes_begin[0]);
    } /* end if */
    else {
        /* Set base file offset for all I/O patterns and POSIX access */
        posix_file_offset=dset_offset + bytes_begin[0]*snbytes+
        bytes_begin[1];

        /* Set base file offset for all I/O patterns and MPI access */
        mpi_file_offset=(MPI_Offset)(dset_offset + bytes_begin[0]*snbytes+
            bytes_begin[1]);
    } /* end else */

    /* Start "raw data" write timer */
    set_time(res->timers, HDF5_RAW_WRITE_FIXED_DIMS, TSTART);

    while (nbytes_xfer < bytes_count){
        /* Write */
        /* Calculate offset of write within a dataset/file */
        switch (parms->io_type) {
        case POSIXIO:
            /* 1D dataspace */
            if (!parms->dim2d){
                /* Contiguous pattern */
                if (!parms->interleaved) {
                    /* Compute file offset */
                    file_offset = posix_file_offset + (off_t)nbytes_xfer;

                    /* only care if seek returns error */
                    rc = POSIXSEEK(fd->posixfd, file_offset) < 0 ? -1 : 0;
                    VRFY((rc==0), "POSIXSEEK");

                    /* check if all bytes are written */
                    rc = ((ssize_t)buf_size ==
                        POSIXWRITE(fd->posixfd, buffer, buf_size));
                    VRFY((rc != 0), "POSIXWRITE");

                    /* Advance global offset in dataset */
                    nbytes_xfer+=buf_size;
                } /* end if */
                /* Interleaved access pattern */
                else {
                    /* Set the base of user's buffer */
                    buf_p=(unsigned char *)buffer;

                    /* Set the number of bytes to transfer this time */
                    nbytes_toxfer = buf_size;

                    /* Loop over the buffers to write */
                    while(nbytes_toxfer>0) {
                        /* Skip offset over blocks of other processes */
                        file_offset = posix_file_offset +


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