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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by the Board of Trustees of the University of Illinois. *
* 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* This verifies if the storage space allocation methods are compatible between
* serial and parallel modes.
*
* Created by: Christian Chilan and Albert Cheng
* Date: 2005/07/05
*/
#include "testphdf5.h"
static int mpi_size, mpi_rank;
#define DATASETNAME "ExtendibleArray"
#define CHUNKSIZE 1000 /* #elements per chunk */
#define DSETSIZE 20000*CHUNKSIZE
static MPI_Offset
get_filesize(const char *filename)
{
int mpierr;
MPI_File fd;
MPI_Offset filesize;
mpierr = MPI_File_open(MPI_COMM_SELF, (char*)filename, MPI_MODE_RDONLY,
MPI_INFO_NULL, &fd);
VRFY((mpierr == MPI_SUCCESS), "");
mpierr = MPI_File_get_size(fd, &filesize);
VRFY((mpierr == MPI_SUCCESS), "");
mpierr = MPI_File_close(&fd);
VRFY((mpierr == MPI_SUCCESS), "");
return(filesize);
}
/*
* This creates a dataset serially with 20000 chunks, each of 1000
* elements. It does not perform any writing on it. Another routine
* will open this in parallel for extension test.
*/
void
create_chunked_dataset(const char *filename)
{
hid_t file; /* handles */
hid_t dataspace, dataset;
hid_t cparms;
hsize_t dims[1] = {DSETSIZE}; /* dataset dimensions
at creation time */
hsize_t maxdims[1] = {H5S_UNLIMITED};
herr_t hrc;
/* Variables used in reading data back */
hsize_t chunk_dims[1] ={CHUNKSIZE};
/* set up MPI parameters */
MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
/* Create the data space with unlimited dimensions. */
dataspace = H5Screate_simple (1, dims, maxdims);
VRFY((dataspace >= 0), "");
/* Create a new file. If file exists its contents will be overwritten. */
file = H5Fcreate (filename, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
VRFY((file >= 0), "");
/* Modify dataset creation properties, i.e. enable chunking */
cparms = H5Pcreate (H5P_DATASET_CREATE);
VRFY((cparms >= 0), "");
hrc = H5Pset_chunk ( cparms, 1, chunk_dims);
VRFY((hrc >= 0), "");
/* Create a new dataset within the file using cparms creation properties. */
dataset = H5Dcreate (file, DATASETNAME, H5T_NATIVE_INT, dataspace, cparms);
VRFY((dataset >= 0), "");
/* Close resources */
hrc = H5Dclose (dataset);
VRFY((hrc >= 0), "");
hrc = H5Fclose (file);
VRFY((hrc >= 0), "");
}
/*
* This program extends the size of a small dataset to 20000 chunks (each of
* 1000 elements) in parallel. The dataset was initially created in a serial
* environment. A correct extend operation should increase the file size
* considerably.
*/
void
extend_chunked_dataset(const char *filename)
{
/* HDF5 gubbins */
hid_t file_id, dataset; /* HDF5 file identifier */
hid_t access_plist; /* HDF5 ID for file access property list */
herr_t hrc; /* HDF5 return code */
hsize_t size[1];
/* MPI Gubbins */
MPI_Offset filesize, /* actual file size */
est_filesize; /* estimated file size */
int mpierr;
/* Initialize MPI */
MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
/* Set up MPIO file access property lists */
access_plist = H5Pcreate(H5P_FILE_ACCESS);
VRFY((access_plist >= 0), "");
hrc = H5Pset_fapl_mpio(access_plist, MPI_COMM_WORLD, MPI_INFO_NULL);
VRFY((hrc >= 0), "");
/* Open the file */
file_id = H5Fopen(filename, H5F_ACC_RDWR, access_plist);
VRFY((file_id >= 0), "");
/* Open dataset*/
dataset = H5Dopen(file_id, DATASETNAME);
VRFY((dataset >= 0), "");
#if 0
size[0] = DSETSIZE;
/* Extend dataset*/
hrc = H5Dextend(dataset, size);
VRFY((hrc >= 0), "");
#endif
/* Close up */
hrc = H5Dclose(dataset);
VRFY((hrc >= 0), "");
hrc = H5Fclose(file_id);
VRFY((hrc >= 0), "");
/* verify file size has grown */
filesize = get_filesize(filename);
est_filesize = DSETSIZE*sizeof(H5T_NATIVE_INT);
VRFY((filesize>=est_filesize), "file size check");
/* Can close some plists */
hrc = H5Pclose(access_plist);
VRFY((hrc >= 0), "");
}
void
test_chunk_alloc(void)
{
const char *filename;
filename = GetTestParameters();
if (VERBOSE_MED)
printf("Extend Chunked allocation test on file %s\n", filename);
/* create the datafile first */
create_chunked_dataset(filename);
/* reopen it in parallel and extend it. */
extend_chunked_dataset(filename);
}
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