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hdf5/src/H5FDmpio.c
Quincey Koziol d27ec1d3bd [svn-r22681] Description: 
Clean up file driver property handling, along with some misc. warnings.

Tested on:
    Mac OSX/64 10.7.4 (amazon) w/debug, gcc 4.7.1, C++, FORTRAN & threadsafe
    (h5committest upcoming)
2012-08-15 09:14:13 -05:00

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Thursday, July 29, 1999
*
* Purpose: This is the MPI-2 I/O driver.
*
*/
/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC H5FD_mpio_init_interface
#include "H5private.h" /* Generic Functions */
#include "H5Dprivate.h" /* Dataset functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* File access */
#include "H5FDprivate.h" /* File drivers */
#include "H5FDmpi.h" /* MPI-based file drivers */
#include "H5Iprivate.h" /* IDs */
#include "H5MMprivate.h" /* Memory management */
#include "H5Pprivate.h" /* Property lists */
#ifdef H5_HAVE_PARALLEL
/*
* The driver identification number, initialized at runtime if H5_HAVE_PARALLEL
* is defined. This allows applications to still have the H5FD_MPIO
* "constants" in their source code.
*/
static hid_t H5FD_MPIO_g = 0;
/*
* The description of a file belonging to this driver.
* The EOF value is only used just after the file is opened in order for the
* library to determine whether the file is empty, truncated, or okay. The MPIO
* driver doesn't bother to keep it updated since it's an expensive operation.
*/
typedef struct H5FD_mpio_t {
H5FD_t pub; /*public stuff, must be first */
MPI_File f; /*MPIO file handle */
MPI_Comm comm; /*communicator */
MPI_Info info; /*file information */
int mpi_rank; /* This process's rank */
int mpi_size; /* Total number of processes */
haddr_t eof; /*end-of-file marker */
haddr_t eoa; /*end-of-address marker */
haddr_t last_eoa; /* Last known end-of-address marker */
} H5FD_mpio_t;
/* Private Prototypes */
/* Callbacks */
static herr_t H5FD_mpio_term(void);
static void *H5FD_mpio_fapl_get(H5FD_t *_file);
static void *H5FD_mpio_fapl_copy(const void *_old_fa);
static herr_t H5FD_mpio_fapl_free(void *_fa);
static H5FD_t *H5FD_mpio_open(const char *name, unsigned flags, hid_t fapl_id,
haddr_t maxaddr);
static herr_t H5FD_mpio_close(H5FD_t *_file);
static herr_t H5FD_mpio_query(const H5FD_t *_f1, unsigned long *flags);
static haddr_t H5FD_mpio_get_eoa(const H5FD_t *_file, H5FD_mem_t type);
static herr_t H5FD_mpio_set_eoa(H5FD_t *_file, H5FD_mem_t type, haddr_t addr);
static haddr_t H5FD_mpio_get_eof(const H5FD_t *_file);
static herr_t H5FD_mpio_get_handle(H5FD_t *_file, hid_t fapl, void** file_handle);
static herr_t H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
size_t size, void *buf);
static herr_t H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
size_t size, const void *buf);
static herr_t H5FD_mpio_flush(H5FD_t *_file, hid_t dxpl_id, unsigned closing);
static herr_t H5FD_mpio_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing);
static int H5FD_mpio_mpi_rank(const H5FD_t *_file);
static int H5FD_mpio_mpi_size(const H5FD_t *_file);
static MPI_Comm H5FD_mpio_communicator(const H5FD_t *_file);
/* MPIO-specific file access properties */
typedef struct H5FD_mpio_fapl_t {
MPI_Comm comm; /*communicator */
MPI_Info info; /*file information */
} H5FD_mpio_fapl_t;
/* The MPIO file driver information */
static const H5FD_class_mpi_t H5FD_mpio_g = {
{ /* Start of superclass information */
"mpio", /*name */
HADDR_MAX, /*maxaddr */
H5F_CLOSE_SEMI, /* fc_degree */
H5FD_mpio_term, /*terminate */
NULL, /*sb_size */
NULL, /*sb_encode */
NULL, /*sb_decode */
sizeof(H5FD_mpio_fapl_t), /*fapl_size */
H5FD_mpio_fapl_get, /*fapl_get */
H5FD_mpio_fapl_copy, /*fapl_copy */
H5FD_mpio_fapl_free, /*fapl_free */
0, /*dxpl_size */
NULL, /*dxpl_copy */
NULL, /*dxpl_free */
H5FD_mpio_open, /*open */
H5FD_mpio_close, /*close */
NULL, /*cmp */
H5FD_mpio_query, /*query */
NULL, /*get_type_map */
NULL, /*alloc */
NULL, /*free */
H5FD_mpio_get_eoa, /*get_eoa */
H5FD_mpio_set_eoa, /*set_eoa */
H5FD_mpio_get_eof, /*get_eof */
H5FD_mpio_get_handle, /*get_handle */
H5FD_mpio_read, /*read */
H5FD_mpio_write, /*write */
H5FD_mpio_flush, /*flush */
H5FD_mpio_truncate, /*truncate */
NULL, /*lock */
NULL, /*unlock */
H5FD_FLMAP_DICHOTOMY /*fl_map */
}, /* End of superclass information */
H5FD_mpio_mpi_rank, /*get_rank */
H5FD_mpio_mpi_size, /*get_size */
H5FD_mpio_communicator /*get_comm */
};
#ifdef H5FDmpio_DEBUG
/* Flags to control debug actions in H5Fmpio.
* Meant to be indexed by characters.
*
* 'c' show result of MPI_Get_count after read
* 'r' show read offset and size
* 't' trace function entry and exit
* 'w' show write offset and size
*/
static int H5FD_mpio_Debug[256] =
{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
#endif
/*--------------------------------------------------------------------------
NAME
H5FD_mpio_init_interface -- Initialize interface-specific information
USAGE
herr_t H5FD_mpio_init_interface()
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Initializes any interface-specific data or routines. (Just calls
H5FD_mpio_init currently).
--------------------------------------------------------------------------*/
static herr_t
H5FD_mpio_init_interface(void)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
FUNC_LEAVE_NOAPI(H5FD_mpio_init())
} /* H5FD_mpio_init_interface() */
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_init
*
* Purpose: Initialize this driver by registering the driver with the
* library.
*
* Return: Success: The driver ID for the mpio driver.
*
* Failure: Negative.
*
* Programmer: Robb Matzke
* Thursday, August 5, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
hid_t
H5FD_mpio_init(void)
{
#ifdef H5FDmpio_DEBUG
static int H5FD_mpio_Debug_inited=0;
#endif /* H5FDmpio_DEBUG */
hid_t ret_value; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
if (H5I_VFL!=H5I_get_type(H5FD_MPIO_g))
H5FD_MPIO_g = H5FD_register((const H5FD_class_t *)&H5FD_mpio_g,sizeof(H5FD_class_mpi_t),FALSE);
#ifdef H5FDmpio_DEBUG
if (!H5FD_mpio_Debug_inited)
{
/* set debug mask */
/* Should this be done in H5F global initialization instead of here? */
const char *s = HDgetenv ("H5FD_mpio_Debug");
if (s) {
while (*s){
H5FD_mpio_Debug[(int)*s]++;
s++;
}
}
H5FD_mpio_Debug_inited++;
}
#endif /* H5FDmpio_DEBUG */
/* Set return value */
ret_value=H5FD_MPIO_g;
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*---------------------------------------------------------------------------
* Function: H5FD_mpio_term
*
* Purpose: Shut down the VFD
*
* Returns: Non-negative on success or negative on failure
*
* Programmer: Quincey Koziol
* Friday, Jan 30, 2004
*
*---------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_term(void)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* Reset VFL ID */
H5FD_MPIO_g=0;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5FD_mpio_term() */
/*-------------------------------------------------------------------------
* Function: H5Pset_fapl_mpio
*
* Purpose: Store the user supplied MPIO communicator comm and info in
* the file access property list FAPL_ID which can then be used
* to create and/or open the file. This function is available
* only in the parallel HDF5 library and is not collective.
*
* comm is the MPI communicator to be used for file open as
* defined in MPI_FILE_OPEN of MPI-2. This function makes a
* duplicate of comm. Any modification to comm after this function
* call returns has no effect on the access property list.
*
* info is the MPI Info object to be used for file open as
* defined in MPI_FILE_OPEN of MPI-2. This function makes a
* duplicate of info. Any modification to info after this
* function call returns has no effect on the access property
* list.
*
* If fapl_id has previously set comm and info values, they
* will be replaced and the old communicator and Info object
* are freed.
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Albert Cheng
* Feb 3, 1998
*
* Modifications:
* Robb Matzke, 1998-02-18
* Check all arguments before the property list is updated so we
* don't leave the property list in a bad state if something
* goes wrong. Also, the property list data type changed to
* allow more generality so all the mpi-related stuff is in the
* `u.mpi' member. The `access_mode' will contain only
* mpi-related flags defined in H5Fpublic.h.
*
* Albert Cheng, 1998-04-16
* Removed the ACCESS_MODE argument. The access mode is changed
* to be controlled by data transfer property list during data
* read/write calls.
*
* Robb Matzke, 1999-08-06
* Modified to work with the virtual file layer.
*
* Raymond Lu, 2001-10-23
* Changed the file access list to the new generic property
* list.
*
* Albert Cheng, 2003-04-17
* Modified the description of the function that it now stores
* a duplicate of the communicator and INFO object. Free the
* old duplicates if previously set. (Work is actually done
* by H5P_set_driver.)
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_fapl_mpio(hid_t fapl_id, MPI_Comm comm, MPI_Info info)
{
H5FD_mpio_fapl_t fa;
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value;
FUNC_ENTER_API(FAIL)
H5TRACE3("e", "iMcMi", fapl_id, comm, info);
if(fapl_id == H5P_DEFAULT)
HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list")
/* Check arguments */
if(NULL == (plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a file access list")
if(MPI_COMM_NULL == comm)
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a valid communicator")
/* Initialize driver specific properties */
fa.comm = comm;
fa.info = info;
/* duplication is done during driver setting. */
ret_value= H5P_set_driver(plist, H5FD_MPIO, &fa);
done:
FUNC_LEAVE_API(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5Pget_fapl_mpio
*
* Purpose: If the file access property list is set to the H5FD_MPIO
* driver then this function returns duplicates of the MPI
* communicator and Info object stored through the comm and
* info pointers. It is the responsibility of the application
* to free the returned communicator and Info object.
*
* Return: Success: Non-negative with the communicator and
* Info object returned through the comm and
* info arguments if non-null. Since they are
* duplicates of the stored objects, future
* modifications to the access property list do
* not affect them and it is the responsibility
* of the application to free them.
*
* Failure: Negative
*
* Programmer: Robb Matzke
* Thursday, February 26, 1998
*
* Modifications:
*
* Albert Cheng, Apr 16, 1998
* Removed the access_mode argument. The access_mode is changed
* to be controlled by data transfer property list during data
* read/write calls.
*
* Raymond Lu, 2001-10-23
* Changed the file access list to the new generic property
* list.
*
* Albert Cheng, 2003-04-17
* Return duplicates of the stored communicator and Info object.
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_fapl_mpio(hid_t fapl_id, MPI_Comm *comm/*out*/, MPI_Info *info/*out*/)
{
H5FD_mpio_fapl_t *fa;
H5P_genplist_t *plist; /* Property list pointer */
MPI_Comm comm_tmp=MPI_COMM_NULL;
int mpi_code; /* mpi return code */
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE3("e", "ixx", fapl_id, comm, info);
if(NULL == (plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a file access list")
if(H5FD_MPIO != H5P_get_driver(plist))
HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "incorrect VFL driver")
if(NULL == (fa = (H5FD_mpio_fapl_t *)H5P_get_driver_info(plist)))
HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "bad VFL driver info")
/* Store the duplicated communicator in a temporary variable for error */
/* recovery in case the INFO duplication fails. We cannot attempt to */
/* the value into *comm yet since if MPI_Comm_dup fails, we will end */
/* up freeing whatever *comm holds and that could be invalid. */
if (comm){
if (MPI_SUCCESS != (mpi_code=MPI_Comm_dup(fa->comm, &comm_tmp)))
HMPI_GOTO_ERROR(FAIL, "MPI_Comm_dup failed", mpi_code)
}
if (info){
if (MPI_INFO_NULL != fa->info){
if (MPI_SUCCESS != (mpi_code=MPI_Info_dup(fa->info, info)))
HMPI_GOTO_ERROR(FAIL, "MPI_Info_dup failed", mpi_code)
}else{
/* do not dup it */
*info = MPI_INFO_NULL;
}
}
if (comm)
*comm = comm_tmp;
done:
if (FAIL==ret_value){
/* need to free anything created here */
if (comm_tmp != MPI_COMM_NULL)
MPI_Comm_free(&comm_tmp);
}
FUNC_LEAVE_API(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5Pset_dxpl_mpio
*
* Purpose: Set the data transfer property list DXPL_ID to use transfer
* mode XFER_MODE. The property list can then be used to control
* the I/O transfer mode during data I/O operations. The valid
* transfer modes are:
*
* H5FD_MPIO_INDEPENDENT:
* Use independent I/O access (the default).
*
* H5FD_MPIO_COLLECTIVE:
* Use collective I/O access.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Albert Cheng
* April 2, 1998
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_dxpl_mpio(hid_t dxpl_id, H5FD_mpio_xfer_t xfer_mode)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iDt", dxpl_id, xfer_mode);
if(dxpl_id == H5P_DEFAULT)
HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list")
/* Check arguments */
if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl")
if(H5FD_MPIO_INDEPENDENT != xfer_mode && H5FD_MPIO_COLLECTIVE != xfer_mode)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "incorrect xfer_mode")
/* Set the transfer mode */
if(H5P_set(plist, H5D_XFER_IO_XFER_MODE_NAME, &xfer_mode) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_dxpl_mpio() */
/*-------------------------------------------------------------------------
* Function: H5Pget_dxpl_mpio
*
* Purpose: Queries the transfer mode current set in the data transfer
* property list DXPL_ID. This is not collective.
*
* Return: Success: Non-negative, with the transfer mode returned
* through the XFER_MODE argument if it is
* non-null.
*
* Failure: Negative
*
* Programmer: Albert Cheng
* April 2, 1998
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_dxpl_mpio(hid_t dxpl_id, H5FD_mpio_xfer_t *xfer_mode/*out*/)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "ix", dxpl_id, xfer_mode);
if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl")
/* Get the transfer mode */
if(xfer_mode)
if(H5P_get(plist, H5D_XFER_IO_XFER_MODE_NAME, xfer_mode) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to get value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pget_dxpl_mpio() */
/*-------------------------------------------------------------------------
* Function: H5Pset_dxpl_mpio_collective_opt
*
* Purpose: To set a flag to choose linked chunk I/O or multi-chunk I/O
* without involving decision-making inside HDF5
*
* Note: The library will do linked chunk I/O or multi-chunk I/O without
* involving communications for decision-making process.
* The library won't behave as it asks for only when we find
* that the low-level MPI-IO package doesn't support this.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Kent Yang
* ? ?, ?
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_dxpl_mpio_collective_opt(hid_t dxpl_id, H5FD_mpio_collective_opt_t opt_mode)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iDc", dxpl_id, opt_mode);
if(dxpl_id == H5P_DEFAULT)
HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list")
/* Check arguments */
if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl")
/* Set the transfer mode */
if(H5P_set(plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME, &opt_mode) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_dxpl_mpio_collective_opt() */
/*-------------------------------------------------------------------------
* Function: H5Pset_dxpl_mpio_chunk_opt
*
* Purpose: To set a flag to choose linked chunk I/O or multi-chunk I/O
* without involving decision-making inside HDF5
*
* Note: The library will do linked chunk I/O or multi-chunk I/O without
* involving communications for decision-making process.
* The library won't behave as it asks for only when we find
* that the low-level MPI-IO package doesn't support this.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Kent Yang
* ? ?, ?
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_dxpl_mpio_chunk_opt(hid_t dxpl_id, H5FD_mpio_chunk_opt_t opt_mode)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iDh", dxpl_id, opt_mode);
if(dxpl_id == H5P_DEFAULT)
HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list")
/* Check arguments */
if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl")
/* Set the transfer mode */
if(H5P_set(plist, H5D_XFER_MPIO_CHUNK_OPT_HARD_NAME, &opt_mode) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_dxpl_mpio_chunk_opt() */
/*-------------------------------------------------------------------------
* Function: H5Pset_dxpl_mpio_chunk_opt_num
*
* Purpose: To set a threshold for doing linked chunk IO
*
* Note: If the number is greater than the threshold set by the user,
* the library will do linked chunk I/O; otherwise, I/O will be
* done for every chunk.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Kent Yang
* ? ?, ?
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_dxpl_mpio_chunk_opt_num(hid_t dxpl_id, unsigned num_chunk_per_proc)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iIu", dxpl_id, num_chunk_per_proc);
if(dxpl_id == H5P_DEFAULT)
HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list")
/* Check arguments */
if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl")
/* Set the transfer mode */
if(H5P_set(plist, H5D_XFER_MPIO_CHUNK_OPT_NUM_NAME, &num_chunk_per_proc) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_dxpl_mpio_chunk_opt_num() */
/*-------------------------------------------------------------------------
* Function: H5Pset_dxpl_mpio_chunk_opt_ratio
*
* Purpose: To set a threshold for doing collective I/O for each chunk
*
* Note: The library will calculate the percentage of the number of
* process holding selections at each chunk. If that percentage
* of number of process in the individual chunk is greater than
* the threshold set by the user, the library will do collective
* chunk I/O for this chunk; otherwise, independent I/O will be
* done for this chunk.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Kent Yang
* ? ?, ?
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_dxpl_mpio_chunk_opt_ratio(hid_t dxpl_id, unsigned percent_num_proc_per_chunk)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iIu", dxpl_id, percent_num_proc_per_chunk);
if(dxpl_id == H5P_DEFAULT)
HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "can't set values in default property list")
/* Check arguments */
if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dxpl")
/* Set the transfer mode */
if(H5P_set(plist, H5D_XFER_MPIO_CHUNK_OPT_RATIO_NAME, &percent_num_proc_per_chunk) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_dxpl_mpio_chunk_opt_ratio() */
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_fapl_get
*
* Purpose: Returns a file access property list which could be used to
* create another file the same as this one.
*
* Return: Success: Ptr to new file access property list with all
* fields copied from the file pointer.
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Friday, August 13, 1999
*
*-------------------------------------------------------------------------
*/
static void *
H5FD_mpio_fapl_get(H5FD_t *_file)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
H5FD_mpio_fapl_t *fa = NULL;
void *ret_value; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
HDassert(file);
HDassert(H5FD_MPIO == file->pub.driver_id);
if(NULL == (fa = (H5FD_mpio_fapl_t *)H5MM_calloc(sizeof(H5FD_mpio_fapl_t))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
/* Duplicate communicator and Info object. */
if(FAIL == H5FD_mpi_comm_info_dup(file->comm, file->info, &fa->comm, &fa->info))
HGOTO_ERROR(H5E_INTERNAL, H5E_CANTCOPY, NULL, "Communicator/Info duplicate failed")
/* Set return value */
ret_value = fa;
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_fapl_copy
*
* Purpose: Copies the mpio-specific file access properties.
*
* Return: Success: Ptr to a new property list
*
* Failure: NULL
*
* Programmer: Albert Cheng
* Jan 8, 2003
*
*-------------------------------------------------------------------------
*/
static void *
H5FD_mpio_fapl_copy(const void *_old_fa)
{
void *ret_value = NULL;
const H5FD_mpio_fapl_t *old_fa = (const H5FD_mpio_fapl_t*)_old_fa;
H5FD_mpio_fapl_t *new_fa = NULL;
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stderr, "enter H5FD_mpio_fapl_copy\n");
#endif
if(NULL == (new_fa = (H5FD_mpio_fapl_t *)H5MM_malloc(sizeof(H5FD_mpio_fapl_t))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
/* Copy the general information */
HDmemcpy(new_fa, old_fa, sizeof(H5FD_mpio_fapl_t));
/* Duplicate communicator and Info object. */
if(FAIL == H5FD_mpi_comm_info_dup(old_fa->comm, old_fa->info, &new_fa->comm, &new_fa->info))
HGOTO_ERROR(H5E_INTERNAL, H5E_CANTCOPY, NULL, "Communicator/Info duplicate failed")
ret_value = new_fa;
done:
if (NULL == ret_value){
/* cleanup */
if (new_fa)
H5MM_xfree(new_fa);
}
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stderr, "leaving H5FD_mpio_fapl_copy\n");
#endif
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_mpio_fapl_copy() */
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_fapl_free
*
* Purpose: Frees the mpio-specific file access properties.
*
* Return: Success: 0
*
* Failure: -1
*
* Programmer: Albert Cheng
* Jan 8, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_fapl_free(void *_fa)
{
herr_t ret_value = SUCCEED;
H5FD_mpio_fapl_t *fa = (H5FD_mpio_fapl_t*)_fa;
FUNC_ENTER_NOAPI_NOINIT_NOERR
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stderr, "in H5FD_mpio_fapl_free\n");
#endif
assert(fa);
/* Free the internal communicator and INFO object */
assert(MPI_COMM_NULL!=fa->comm);
H5FD_mpi_comm_info_free(&fa->comm, &fa->info);
H5MM_xfree(fa);
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stderr, "leaving H5FD_mpio_fapl_free\n");
#endif
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_mpio_fapl_free() */
/*-------------------------------------------------------------------------
* Function: H5FD_set_mpio_atomicity
*
* Purpose: Sets the atomicity mode
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Mohamad Chaarawi
* Feb 14, 2012
*
*-------------------------------------------------------------------------
*/
herr_t
H5FD_set_mpio_atomicity(H5FD_t *_file, hbool_t flag)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
int mpi_code; /* MPI return code */
int temp_flag;
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Entering H5FD_set_mpio_atomicity\n");
#endif
if (FALSE == flag)
temp_flag = 0;
else
temp_flag = 1;
/* set atomicity value */
if (MPI_SUCCESS != (mpi_code=MPI_File_set_atomicity(file->f, temp_flag)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_set_atomicity", mpi_code)
done:
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Leaving H5FD_set_mpio_atomicity\n");
#endif
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_get_mpio_atomicity
*
* Purpose: Returns the atomicity mode
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Mohamad Chaarawi
* Feb 14, 2012
*
*-------------------------------------------------------------------------
*/
herr_t
H5FD_get_mpio_atomicity(H5FD_t *_file, hbool_t *flag)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
int mpi_code; /* MPI return code */
int temp_flag;
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Entering H5FD_get_mpio_atomicity\n");
#endif
/* get atomicity value */
if (MPI_SUCCESS != (mpi_code=MPI_File_get_atomicity(file->f, &temp_flag)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_get_atomicity", mpi_code)
if (0 != temp_flag)
*flag = TRUE;
else
*flag = FALSE;
done:
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Leaving H5FD_get_mpio_atomicity\n");
#endif
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_open
*
* Purpose: Opens a file with name NAME. The FLAGS are a bit field with
* purpose similar to the second argument of open(2) and which
* are defined in H5Fpublic.h. The file access property list
* FAPL_ID contains the properties driver properties and MAXADDR
* is the largest address which this file will be expected to
* access. This is collective.
*
* Return: Success: A new file pointer.
*
* Failure: NULL
*
* Programmer:
* January 30, 1998
*
* Modifications:
* Robb Matzke, 1998-02-18
* Added the ACCESS_PARMS argument. Moved some error checking
* here from elsewhere.
*
* rky, 1998-01-11
* Added H5FD_mpio_Debug debug flags controlled by MPI_Info.
*
* rky, 1998-08-28
* Init flag controlling redundant metadata writes to disk.
*
* rky, 1998-12-07
* Added barrier after MPI_File_set_size to prevent race
* condition -- subsequent writes were being truncated, causing
* holes in file.
*
* Robb Matzke, 1999-08-06
* Modified to work with the virtual file layer.
*
* rky & ppw, 1999-11-07
* Modified "H5FD_mpio_open" so that file-truncation is
* avoided for brand-new files (with zero filesize).
*
* Albert Cheng, 2003-04-17
* Duplicate the communicator and Info object so that file is
* insulated from the old one.
*-------------------------------------------------------------------------
*/
static H5FD_t *
H5FD_mpio_open(const char *name, unsigned flags, hid_t fapl_id,
haddr_t UNUSED maxaddr)
{
H5FD_mpio_t *file=NULL;
MPI_File fh;
unsigned file_opened=0; /* Flag to indicate that the file was successfully opened */
int mpi_amode;
int mpi_rank; /* MPI rank of this process */
int mpi_size; /* Total number of MPI processes */
int mpi_code; /* mpi return code */
MPI_Offset size;
const H5FD_mpio_fapl_t *fa=NULL;
H5FD_mpio_fapl_t _fa;
H5P_genplist_t *plist; /* Property list pointer */
MPI_Comm comm_dup=MPI_COMM_NULL;
MPI_Info info_dup=MPI_INFO_NULL;
H5FD_t *ret_value; /* Return value */
#ifndef H5_HAVE_MPI_GET_SIZE
h5_stat_t stat_buf;
#endif
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t']) {
fprintf(stdout, "Entering H5FD_mpio_open(name=\"%s\", flags=0x%x, "
"fapl_id=%d, maxaddr=%lu)\n", name, flags, (int)fapl_id, (unsigned long)maxaddr);
}
#endif
/* Obtain a pointer to mpio-specific file access properties */
if(NULL == (plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
if(H5P_FILE_ACCESS_DEFAULT == fapl_id || H5FD_MPIO != H5P_get_driver(plist)) {
_fa.comm = MPI_COMM_SELF; /*default*/
_fa.info = MPI_INFO_NULL; /*default*/
fa = &_fa;
} else {
fa = (const H5FD_mpio_fapl_t *)H5P_get_driver_info(plist);
assert(fa);
}
/* Duplicate communicator and Info object for use by this file. */
if (FAIL==H5FD_mpi_comm_info_dup(fa->comm, fa->info, &comm_dup, &info_dup))
HGOTO_ERROR(H5E_INTERNAL, H5E_CANTCOPY, NULL, "Communicator/Info duplicate failed")
/* convert HDF5 flags to MPI-IO flags */
/* some combinations are illegal; let MPI-IO figure it out */
mpi_amode = (flags&H5F_ACC_RDWR) ? MPI_MODE_RDWR : MPI_MODE_RDONLY;
if (flags&H5F_ACC_CREAT) mpi_amode |= MPI_MODE_CREATE;
if (flags&H5F_ACC_EXCL) mpi_amode |= MPI_MODE_EXCL;
#ifdef H5FDmpio_DEBUG
/* Check for debug commands in the info parameter */
{
char debug_str[128];
int flag, i;
if (MPI_INFO_NULL != info_dup) {
/*OKAY: CAST DISCARDS CONST*/
MPI_Info_get(fa->info, (char *)H5F_MPIO_DEBUG_KEY, 127, debug_str, &flag);
if (flag) {
fprintf(stdout, "H5FD_mpio debug flags=%s\n", debug_str );
for (i=0;
debug_str[i]/*end of string*/ && i<128/*just in case*/;
++i) {
H5FD_mpio_Debug[(int)debug_str[i]] = 1;
}
}
}
}
#endif
/*OKAY: CAST DISCARDS CONST*/
if(MPI_SUCCESS != (mpi_code = MPI_File_open(comm_dup, (char*)name, mpi_amode, info_dup, &fh)))
HMPI_GOTO_ERROR(NULL, "MPI_File_open failed", mpi_code)
file_opened=1;
/* Get the MPI rank of this process and the total number of processes */
if (MPI_SUCCESS != (mpi_code=MPI_Comm_rank (comm_dup, &mpi_rank)))
HMPI_GOTO_ERROR(NULL, "MPI_Comm_rank failed", mpi_code)
if (MPI_SUCCESS != (mpi_code=MPI_Comm_size (comm_dup, &mpi_size)))
HMPI_GOTO_ERROR(NULL, "MPI_Comm_size failed", mpi_code)
/* Build the return value and initialize it */
if(NULL == (file = (H5FD_mpio_t *)H5MM_calloc(sizeof(H5FD_mpio_t))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
file->f = fh;
file->comm = comm_dup;
file->info = info_dup;
file->mpi_rank = mpi_rank;
file->mpi_size = mpi_size;
/* Only processor p0 will get the filesize and broadcast it. */
if (mpi_rank == 0) {
/* Get current file size. If MPI_File_get_size is disabled in configuration
* because it doesn't return correct value (SGI Altix Propack 4),
* use stat to get the file size. */
#ifdef H5_HAVE_MPI_GET_SIZE
if (MPI_SUCCESS != (mpi_code=MPI_File_get_size(fh, &size)))
HMPI_GOTO_ERROR(NULL, "MPI_File_get_size failed", mpi_code)
#else
if((mpi_code=HDstat(name, &stat_buf))<0)
HMPI_GOTO_ERROR(NULL, "stat failed", mpi_code)
/* Hopefully this casting is safe */
size = (MPI_Offset)(stat_buf.st_size);
#endif
} /* end if */
/* Broadcast file size */
if(MPI_SUCCESS != (mpi_code = MPI_Bcast(&size, (int)sizeof(MPI_Offset), MPI_BYTE, 0, comm_dup)))
HMPI_GOTO_ERROR(NULL, "MPI_Bcast failed", mpi_code)
/* Determine if the file should be truncated */
if(size && (flags & H5F_ACC_TRUNC)) {
if (MPI_SUCCESS != (mpi_code=MPI_File_set_size(fh, (MPI_Offset)0)))
HMPI_GOTO_ERROR(NULL, "MPI_File_set_size failed", mpi_code)
/* Don't let any proc return until all have truncated the file. */
if (MPI_SUCCESS!= (mpi_code=MPI_Barrier(comm_dup)))
HMPI_GOTO_ERROR(NULL, "MPI_Barrier failed", mpi_code)
/* File is zero size now */
size = 0;
} /* end if */
/* Set the size of the file (from library's perspective) */
file->eof = H5FD_mpi_MPIOff_to_haddr(size);
/* Set return value */
ret_value=(H5FD_t*)file;
done:
if(ret_value==NULL) {
if(file_opened)
MPI_File_close(&fh);
if (MPI_COMM_NULL != comm_dup)
MPI_Comm_free(&comm_dup);
if (MPI_INFO_NULL != info_dup)
MPI_Info_free(&info_dup);
if (file)
H5MM_xfree(file);
} /* end if */
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Leaving H5FD_mpio_open\n" );
#endif
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_close
*
* Purpose: Closes a file. This is collective.
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Unknown
* January 30, 1998
*
* Modifications:
* Robb Matzke, 1998-02-18
* Added the ACCESS_PARMS argument.
*
* Robb Matzke, 1999-08-06
* Modified to work with the virtual file layer.
*
* Albert Cheng, 2003-04-17
* Free the communicator stored.
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_close(H5FD_t *_file)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
int mpi_code; /* MPI return code */
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Entering H5FD_mpio_close\n");
#endif
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
/* MPI_File_close sets argument to MPI_FILE_NULL */
if (MPI_SUCCESS != (mpi_code=MPI_File_close(&(file->f)/*in,out*/)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_close failed", mpi_code)
/* Clean up other stuff */
H5FD_mpi_comm_info_free(&file->comm, &file->info);
H5MM_xfree(file);
done:
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Leaving H5FD_mpio_close\n");
#endif
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_query
*
* Purpose: Set the flags that this VFL driver is capable of supporting.
* (listed in H5FDpublic.h)
*
* Return: Success: non-negative
*
* Failure: negative
*
* Programmer: Quincey Koziol
* Friday, August 25, 2000
*
* Modifications:
*
* John Mainzer -- 9/21/05
* Modified code to turn off the
* H5FD_FEAT_ACCUMULATE_METADATA_WRITE flag.
* With the movement of
* all cache writes to process 0, this flag has become
* problematic in PHDF5.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_query(const H5FD_t UNUSED *_file, unsigned long *flags /* out */)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
/* Set the VFL feature flags that this driver supports */
if(flags) {
*flags=0;
*flags|=H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */
*flags|=H5FD_FEAT_AGGREGATE_SMALLDATA; /* OK to aggregate "small" raw data allocations */
*flags|=H5FD_FEAT_HAS_MPI; /* This driver uses MPI */
*flags|=H5FD_FEAT_ALLOCATE_EARLY; /* Allocate space early instead of late */
} /* end if */
FUNC_LEAVE_NOAPI(SUCCEED)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_get_eoa
*
* Purpose: Gets the end-of-address marker for the file. The EOA marker
* is the first address past the last byte allocated in the
* format address space.
*
* Return: Success: The end-of-address marker.
*
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Friday, August 6, 1999
*
* Modifications:
* Raymond Lu
* 21 Dec. 2006
* Added the parameter TYPE. It's only used for MULTI driver.
*
*-------------------------------------------------------------------------
*/
static haddr_t
H5FD_mpio_get_eoa(const H5FD_t *_file, H5FD_mem_t UNUSED type)
{
const H5FD_mpio_t *file = (const H5FD_mpio_t*)_file;
FUNC_ENTER_NOAPI_NOINIT_NOERR
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
FUNC_LEAVE_NOAPI(file->eoa)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_set_eoa
*
* Purpose: Set the end-of-address marker for the file. This function is
* called shortly after an existing HDF5 file is opened in order
* to tell the driver where the end of the HDF5 data is located.
*
* Return: Success: 0
*
* Failure: -1
*
* Programmer: Robb Matzke
* Friday, August 6, 1999
*
* Modifications:
* Raymond Lu
* 21 Dec. 2006
* Added the parameter TYPE. It's only used for MULTI driver.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_set_eoa(H5FD_t *_file, H5FD_mem_t UNUSED type, haddr_t addr)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
FUNC_ENTER_NOAPI_NOINIT_NOERR
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
file->eoa = addr;
FUNC_LEAVE_NOAPI(SUCCEED)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_get_eof
*
* Purpose: Gets the end-of-file marker for the file. The EOF marker
* is the real size of the file.
*
* The MPIO driver doesn't bother keeping this field updated
* since that's a relatively expensive operation. Fortunately
* the library only needs the EOF just after the file is opened
* in order to determine whether the file is empty, truncated,
* or okay. Therefore, any MPIO I/O function will set its value
* to HADDR_UNDEF which is the error return value of this
* function.
*
* Keeping the EOF updated (during write calls) is expensive
* because any process may extend the physical end of the
* file. -QAK
*
* Return: Success: The end-of-address marker.
*
* Failure: HADDR_UNDEF
*
* Programmer: Robb Matzke
* Friday, August 6, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static haddr_t
H5FD_mpio_get_eof(const H5FD_t *_file)
{
const H5FD_mpio_t *file = (const H5FD_mpio_t*)_file;
FUNC_ENTER_NOAPI_NOINIT_NOERR
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
FUNC_LEAVE_NOAPI(file->eof)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_get_handle
*
* Purpose: Returns the file handle of MPIO file driver.
*
* Returns: Non-negative if succeed or negative if fails.
*
* Programmer: Raymond Lu
* Sept. 16, 2002
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_get_handle(H5FD_t *_file, hid_t UNUSED fapl, void** file_handle)
{
H5FD_mpio_t *file = (H5FD_mpio_t *)_file;
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
if(!file_handle)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "file handle not valid")
*file_handle = &(file->f);
done:
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_read
*
* Purpose: Reads SIZE bytes of data from FILE beginning at address ADDR
* into buffer BUF according to data transfer properties in
* DXPL_ID using potentially complex file and buffer types to
* effect the transfer.
*
* Reading past the end of the MPI file returns zeros instead of
* failing. MPI is able to coalesce requests from different
* processes (collective or independent).
*
* Return: Success: Zero. Result is stored in caller-supplied
* buffer BUF.
*
* Failure: -1, Contents of buffer BUF are undefined.
*
* Programmer: rky, 1998-01-30
*
* Modifications:
* Robb Matzke, 1998-02-18
* Added the ACCESS_PARMS argument.
*
* rky, 1998-04-10
* Call independent or collective MPI read, based on
* ACCESS_PARMS.
*
* Albert Cheng, 1998-06-01
* Added XFER_MODE to control independent or collective MPI
* read.
*
* rky, 1998-08-16
* Use BTYPE, FTYPE, and DISP from access parms. The guts of
* H5FD_mpio_read and H5FD_mpio_write should be replaced by a
* single dual-purpose routine.
*
* Robb Matzke, 1999-04-21
* Changed XFER_MODE to XFER_PARMS for all H5F_*_read()
* callbacks.
*
* Robb Matzke, 1999-07-28
* The ADDR argument is passed by value.
*
* Robb Matzke, 1999-08-06
* Modified to work with the virtual file layer.
*
* Quincey Koziol, 2002-05-14
* Only call MPI_Get_count if we can use MPI_BYTE for the MPI type
* for the I/O transfer. Someday we might include code to decode
* the MPI type used for more complicated transfers and call
* MPI_Get_count all the time.
*
* Quincey Koziol - 2002/06/17
* Removed 'disp' parameter from H5FD_mpio_setup routine and use
* the address of the dataset in MPI_File_set_view() calls, as
* necessary.
*
* Quincey Koziol - 2002/06/24
* Removed "lazy" MPI_File_set_view() calls, since they would fail
* if the first I/O was a collective I/O using MPI derived types
* and the next I/O was an independent I/O.
*
* Quincey Koziol - 2003/10/22-31
* Restructured code massively, straightening out logic and finally
* getting the bytes_read stuff working.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t dxpl_id, haddr_t addr, size_t size,
void *buf/*out*/)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
MPI_Offset mpi_off;
MPI_Status mpi_stat; /* Status from I/O operation */
int mpi_code; /* mpi return code */
MPI_Datatype buf_type = MPI_BYTE; /* MPI description of the selection in memory */
int size_i; /* Integer copy of 'size' to read */
int bytes_read; /* Number of bytes read in */
int n;
int type_size; /* MPI datatype used for I/O's size */
int io_size; /* Actual number of bytes requested */
H5P_genplist_t *plist = NULL; /* Property list pointer */
hbool_t use_view_this_time = FALSE;
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Entering H5FD_mpio_read\n" );
#endif
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
/* Make certain we have the correct type of property list */
assert(H5I_GENPROP_LST==H5I_get_type(dxpl_id));
assert(TRUE==H5P_isa_class(dxpl_id,H5P_DATASET_XFER));
assert(buf);
/* Portably initialize MPI status variable */
HDmemset(&mpi_stat,0,sizeof(MPI_Status));
/* some numeric conversions */
if (H5FD_mpi_haddr_to_MPIOff(addr, &mpi_off/*out*/)<0)
HGOTO_ERROR(H5E_INTERNAL, H5E_BADRANGE, FAIL, "can't convert from haddr to MPI off")
size_i = (int)size;
if ((hsize_t)size_i != size)
HGOTO_ERROR(H5E_INTERNAL, H5E_BADRANGE, FAIL, "can't convert from size to size_i")
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'r'])
fprintf(stdout, "in H5FD_mpio_read mpi_off=%ld size_i=%d\n",
(long)mpi_off, size_i );
#endif
/* Only look for MPI views for raw data transfers */
if(type==H5FD_MEM_DRAW) {
H5FD_mpio_xfer_t xfer_mode; /* I/O tranfer mode */
/* Obtain the data transfer properties */
if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
xfer_mode = (H5FD_mpio_xfer_t)H5P_peek_unsigned(plist, H5D_XFER_IO_XFER_MODE_NAME);
/*
* Set up for a fancy xfer using complex types, or single byte block. We
* wouldn't need to rely on the use_view field if MPI semantics allowed
* us to test that btype=ftype=MPI_BYTE (or even MPI_TYPE_NULL, which
* could mean "use MPI_BYTE" by convention).
*/
if(xfer_mode==H5FD_MPIO_COLLECTIVE) {
MPI_Datatype file_type;
/* Remember that views are used */
use_view_this_time = TRUE;
/* prepare for a full-blown xfer using btype, ftype, and disp */
if(H5P_get(plist,H5FD_MPI_XFER_MEM_MPI_TYPE_NAME,&buf_type)<0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O type property")
if(H5P_get(plist,H5FD_MPI_XFER_FILE_MPI_TYPE_NAME,&file_type)<0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O type property")
/*
* Set the file view when we are using MPI derived types
*/
/*OKAY: CAST DISCARDS CONST QUALIFIER*/
if (MPI_SUCCESS != (mpi_code=MPI_File_set_view(file->f, mpi_off, MPI_BYTE, file_type, H5FD_mpi_native_g, file->info)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_set_view failed", mpi_code)
/* When using types, use the address as the displacement for
* MPI_File_set_view and reset the address for the read to zero
*/
mpi_off=0;
} /* end if */
} /* end if */
/* Read the data. */
if(use_view_this_time) {
H5FD_mpio_collective_opt_t coll_opt_mode;
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "H5FD_mpio_read: using MPIO collective mode\n");
#endif
/* Peek the collective_opt property to check whether the application wants to do IO individually. */
HDassert(plist);
coll_opt_mode = (H5FD_mpio_collective_opt_t)H5P_peek_unsigned(plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME);
if(coll_opt_mode == H5FD_MPIO_COLLECTIVE_IO) {
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "H5FD_mpio_read: doing MPI collective IO\n");
#endif
if(MPI_SUCCESS != (mpi_code = MPI_File_read_at_all(file->f, mpi_off, buf, size_i, buf_type, &mpi_stat)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_read_at_all failed", mpi_code)
} /* end if */
else {
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "H5FD_mpio_read: doing MPI independent IO\n");
#endif
if(MPI_SUCCESS != (mpi_code = MPI_File_read_at(file->f, mpi_off, buf, size_i, buf_type, &mpi_stat)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_read_at failed", mpi_code)
} /* end else */
/*
* Reset the file view when we used MPI derived types
*/
/*OKAY: CAST DISCARDS CONST QUALIFIER*/
if(MPI_SUCCESS != (mpi_code = MPI_File_set_view(file->f, (MPI_Offset)0, MPI_BYTE, MPI_BYTE, H5FD_mpi_native_g, file->info)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_set_view failed", mpi_code)
} else {
if(MPI_SUCCESS != (mpi_code = MPI_File_read_at(file->f, mpi_off, buf, size_i, buf_type, &mpi_stat)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_read_at failed", mpi_code)
}
/* How many bytes were actually read? */
/* [This works because the "basic elements" we use for all our MPI derived
* types are MPI_BYTE. We should be using the 'buf_type' for the MPI
* datatype in this call though... (We aren't because using it causes
* the LANL "qsc" machine to dump core - 12/19/03) - QAK]
*/
if (MPI_SUCCESS != (mpi_code=MPI_Get_elements(&mpi_stat, MPI_BYTE, &bytes_read)))
HMPI_GOTO_ERROR(FAIL, "MPI_Get_elements failed", mpi_code)
/* Get the type's size */
if (MPI_SUCCESS != (mpi_code=MPI_Type_size(buf_type,&type_size)))
HMPI_GOTO_ERROR(FAIL, "MPI_Type_size failed", mpi_code)
/* Compute the actual number of bytes requested */
io_size=type_size*size_i;
/* Check for read failure */
if (bytes_read<0 || bytes_read>io_size)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed")
/*
* This gives us zeroes beyond end of physical MPI file.
*/
if ((n=(io_size-bytes_read)) > 0)
HDmemset((char*)buf+bytes_read, 0, (size_t)n);
done:
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Leaving H5FD_mpio_read\n" );
#endif
FUNC_LEAVE_NOAPI(ret_value)
}
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_write
*
* Purpose: Writes SIZE bytes of data to FILE beginning at address ADDR
* from buffer BUF according to data transfer properties in
* DXPL_ID using potentially complex file and buffer types to
* effect the transfer.
*
* MPI is able to coalesce requests from different processes
* (collective and independent).
*
* Return: Success: Zero. USE_TYPES and OLD_USE_TYPES in the
* access params are altered.
*
* Failure: -1, USE_TYPES and OLD_USE_TYPES in the
* access params may be altered.
*
* Programmer: Unknown
* January 30, 1998
*
* Modifications:
* rky, 1998-08-28
* If the file->allsame flag is set, we assume that all the
* procs in the relevant MPI communicator will write identical
* data at identical offsets in the file, so only proc 0 will
* write, and all other procs will wait for p0 to finish. This
* is useful for writing metadata, for example. Note that we
* don't _check_ that the data is identical. Also, the mechanism
* we use to eliminate the redundant writes is by requiring a
* call to H5FD_mpio_tas_allsame before the write, which is
* rather klugey. Would it be better to pass a parameter to
* low-level writes like H5F_block_write and H5F_low_write,
* instead? Or...??? Also, when I created this mechanism I
* wanted to minimize the difference in behavior between the old
* way of doing things (i.e., all procs write) and the new way,
* so the writes are eliminated at the very lowest level, here
* in H5FD_mpio_write. It may be better to rethink that, and
* short-circuit the writes at a higher level (e.g., at the
* points in the code where H5FD_mpio_tas_allsame is called).
*
*
* Robb Matzke, 1998-02-18
* Added the ACCESS_PARMS argument.
*
* rky, 1998-04-10
* Call independent or collective MPI write, based on
* ACCESS_PARMS.
*
* rky, 1998-04-24
* Removed redundant write from H5FD_mpio_write.
*
* Albert Cheng, 1998-06-01
* Added XFER_MODE to control independent or collective MPI
* write.
*
* rky, 1998-08-16
* Use BTYPE, FTYPE, and DISP from access parms. The guts of
* H5FD_mpio_read and H5FD_mpio_write should be replaced by a
* single dual-purpose routine.
*
* rky, 1998-08-28
* Added ALLSAME parameter to make all but proc 0 skip the
* actual write.
*
* Robb Matzke, 1999-04-21
* Changed XFER_MODE to XFER_PARMS for all H5FD_*_write()
* callbacks.
*
* Robb Matzke, 1999-07-28
* The ADDR argument is passed by value.
*
* Robb Matzke, 1999-08-06
* Modified to work with the virtual file layer.
*
* Albert Cheng, 1999-12-19
* When only-p0-write-allsame-data, p0 Bcasts the
* ret_value to other processes. This prevents
* a racing condition (that other processes try to
* read the file before p0 finishes writing) and also
* allows all processes to report the same ret_value.
*
* Kim Yates, Pat Weidhaas, 2000-09-26
* Move block of coding where only p0 writes after the
* MPI_File_set_view call.
*
* Quincey Koziol, 2002-05-10
* Instead of always writing metadata from process 0, spread the
* burden among all the processes by using a round-robin rotation
* scheme.
*
* Quincey Koziol, 2002-05-10
* Removed allsame code, keying off the type parameter instead.
*
* Quincey Koziol, 2002-05-14
* Only call MPI_Get_count if we can use MPI_BYTE for the MPI type
* for the I/O transfer. Someday we might include code to decode
* the MPI type used for more complicated transfers and call
* MPI_Get_count all the time.
*
* Quincey Koziol - 2002/06/17
* Removed 'disp' parameter from H5FD_mpio_setup routine and use
* the address of the dataset in MPI_File_set_view() calls, as
* necessary.
*
* Quincey Koziol - 2002/06/24
* Removed "lazy" MPI_File_set_view() calls, since they would fail
* if the first I/O was a collective I/O using MPI derived types
* and the next I/O was an independent I/O.
*
* Quincey Koziol - 2002/07/18
* Added "block_before_meta_write" dataset transfer flag, which
* is set during writes from a metadata cache flush and indicates
* that all the processes must sync up before (one of them)
* writing metadata.
*
* Quincey Koziol - 2003/10/22-31
* Restructured code massively, straightening out logic and finally
* getting the bytes_written stuff working.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
size_t size, const void *buf)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
MPI_Offset mpi_off;
MPI_Status mpi_stat; /* Status from I/O operation */
MPI_Datatype buf_type = MPI_BYTE; /* MPI description of the selection in memory */
int mpi_code; /* MPI return code */
int size_i, bytes_written;
int type_size; /* MPI datatype used for I/O's size */
int io_size; /* Actual number of bytes requested */
hbool_t use_view_this_time = FALSE;
H5P_genplist_t *plist = NULL; /* Property list pointer */
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if (H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "Entering H5FD_mpio_write\n" );
#endif
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
/* Make certain we have the correct type of property list */
assert(H5I_GENPROP_LST==H5I_get_type(dxpl_id));
assert(TRUE==H5P_isa_class(dxpl_id,H5P_DATASET_XFER));
assert(buf);
/* Portably initialize MPI status variable */
HDmemset(&mpi_stat, 0, sizeof(MPI_Status));
/* some numeric conversions */
if(H5FD_mpi_haddr_to_MPIOff(addr, &mpi_off) < 0)
HGOTO_ERROR(H5E_INTERNAL, H5E_BADRANGE, FAIL, "can't convert from haddr to MPI off")
size_i = (int)size;
if((hsize_t)size_i != size)
HGOTO_ERROR(H5E_INTERNAL, H5E_BADRANGE, FAIL, "can't convert from size to size_i")
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'w'])
fprintf(stdout, "in H5FD_mpio_write mpi_off=%ld size_i=%d\n", (long)mpi_off, size_i);
#endif
if(type == H5FD_MEM_DRAW) {
H5FD_mpio_xfer_t xfer_mode; /* I/O tranfer mode */
/* Obtain the data transfer properties */
if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
/* Obtain the data transfer properties */
xfer_mode = (H5FD_mpio_xfer_t)H5P_peek_unsigned(plist, H5D_XFER_IO_XFER_MODE_NAME);
/*
* Set up for a fancy xfer using complex types, or single byte block. We
* wouldn't need to rely on the use_view field if MPI semantics allowed
* us to test that btype=ftype=MPI_BYTE (or even MPI_TYPE_NULL, which
* could mean "use MPI_BYTE" by convention).
*/
if(xfer_mode == H5FD_MPIO_COLLECTIVE) {
MPI_Datatype file_type;
/* Remember that views are used */
use_view_this_time = TRUE;
/* prepare for a full-blown xfer using btype, ftype, and disp */
if(H5P_get(plist, H5FD_MPI_XFER_MEM_MPI_TYPE_NAME, &buf_type) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O type property")
if(H5P_get(plist, H5FD_MPI_XFER_FILE_MPI_TYPE_NAME, &file_type) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O type property")
/*
* Set the file view when we are using MPI derived types
*/
/*OKAY: CAST DISCARDS CONST QUALIFIER*/
if(MPI_SUCCESS != (mpi_code = MPI_File_set_view(file->f, mpi_off, MPI_BYTE, file_type, H5FD_mpi_native_g, file->info)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_set_view failed", mpi_code)
/* When using types, use the address as the displacement for
* MPI_File_set_view and reset the address for the read to zero
*/
mpi_off = 0;
} /* end if */
} /* end if */
else {
#if 0 /* JRM -- 3/23/10 */ /* this is no longer always the case */
/* Only one process can do the actual metadata write */
if(file->mpi_rank != H5_PAR_META_WRITE)
#ifdef LATER
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "can't write metadata from non-zero rank")
#else /* LATER */
HGOTO_DONE(SUCCEED) /* skip the actual write */
#endif /* LATER */
#endif /* JRM */
} /* end if */
/* Write the data. */
if(use_view_this_time) {
H5FD_mpio_collective_opt_t coll_opt_mode;
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "H5FD_mpio_write: using MPIO collective mode\n");
#endif
/* Peek the collective_opt property to check whether the application wants to do IO individually. */
HDassert(plist);
coll_opt_mode = (H5FD_mpio_collective_opt_t)H5P_peek_unsigned(plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME);
/*OKAY: CAST DISCARDS CONST QUALIFIER*/
if(coll_opt_mode == H5FD_MPIO_COLLECTIVE_IO) {
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "H5FD_mpio_write: doing MPI collective IO\n");
#endif
if(MPI_SUCCESS != (mpi_code = MPI_File_write_at_all(file->f, mpi_off, (void*)buf, size_i, buf_type, &mpi_stat)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_write_at_all failed", mpi_code)
} /* end if */
else {
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "H5FD_mpio_write: doing MPI independent IO\n");
#endif
if(MPI_SUCCESS != (mpi_code = MPI_File_write_at(file->f, mpi_off, (void*)buf, size_i, buf_type, &mpi_stat)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_write_at failed", mpi_code)
} /* end else */
/* Reset the file view when we used MPI derived types */
/*OKAY: CAST DISCARDS CONST QUALIFIER*/
if(MPI_SUCCESS != (mpi_code = MPI_File_set_view(file->f, (MPI_Offset)0, MPI_BYTE, MPI_BYTE, H5FD_mpi_native_g, file->info)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_set_view failed", mpi_code)
} else {
/*OKAY: CAST DISCARDS CONST QUALIFIER*/
if(MPI_SUCCESS != (mpi_code = MPI_File_write_at(file->f, mpi_off, (void*)buf, size_i, buf_type, &mpi_stat)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_write_at failed", mpi_code)
}
/* How many bytes were actually written? */
/* [This works because the "basic elements" we use for all our MPI derived
* types are MPI_BYTE. We should be using the 'buf_type' for the MPI
* datatype in this call though... (We aren't because using it causes
* the LANL "qsc" machine to dump core - 12/19/03) - QAK]
*/
if(MPI_SUCCESS != (mpi_code = MPI_Get_elements(&mpi_stat, MPI_BYTE, &bytes_written)))
HMPI_GOTO_ERROR(FAIL, "MPI_Get_elements failed", mpi_code)
/* Get the type's size */
if(MPI_SUCCESS != (mpi_code = MPI_Type_size(buf_type, &type_size)))
HMPI_GOTO_ERROR(FAIL, "MPI_Type_size failed", mpi_code)
/* Compute the actual number of bytes requested */
io_size = type_size * size_i;
/* Check for write failure */
if(bytes_written != io_size)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
/* Forget the EOF value (see H5FD_mpio_get_eof()) --rpm 1999-08-06 */
file->eof = HADDR_UNDEF;
done:
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
fprintf(stdout, "proc %d: Leaving H5FD_mpio_write with ret_value=%d\n",
file->mpi_rank, ret_value );
#endif
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_mpio_write() */
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_flush
*
* Purpose: Makes sure that all data is on disk. This is collective.
*
* Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Robb Matzke
* January 30, 1998
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_flush(H5FD_t *_file, hid_t UNUSED dxpl_id, unsigned closing)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
int mpi_code; /* mpi return code */
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
HDfprintf(stdout, "Entering %s\n", FUNC);
#endif
HDassert(file);
HDassert(H5FD_MPIO == file->pub.driver_id);
/* Only sync the file if we are not going to immediately close it */
if(!closing) {
if(MPI_SUCCESS != (mpi_code = MPI_File_sync(file->f)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_sync failed", mpi_code)
} /* end if */
done:
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
HDfprintf(stdout, "Leaving %s\n", FUNC);
#endif
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_mpio_flush() */
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_truncate
*
* Purpose: Make certain the file's size matches it's allocated size
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* January 31, 2008
*
*-------------------------------------------------------------------------
*/
static herr_t
H5FD_mpio_truncate(H5FD_t *_file, hid_t UNUSED dxpl_id, hbool_t UNUSED closing)
{
H5FD_mpio_t *file = (H5FD_mpio_t*)_file;
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
HDfprintf(stdout, "Entering %s\n", FUNC);
#endif
HDassert(file);
HDassert(H5FD_MPIO == file->pub.driver_id);
/* Extend the file to make sure it's large enough, then sync.
* Unfortunately, keeping track of EOF is an expensive operation, so
* we can't just check whether EOF<EOA like with other drivers.
* Therefore we'll just read the byte at EOA-1 and then write it back. */
if(file->eoa > file->last_eoa) {
int mpi_code; /* mpi return code */
MPI_Offset mpi_off;
#ifdef H5_MPI_FILE_SET_SIZE_BIG
if(H5FD_mpi_haddr_to_MPIOff(file->eoa, &mpi_off) < 0)
HGOTO_ERROR(H5E_INTERNAL, H5E_BADRANGE, FAIL, "cannot convert from haddr_t to MPI_Offset")
/* Extend the file's size */
if(MPI_SUCCESS != (mpi_code = MPI_File_set_size(file->f, mpi_off)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_set_size failed", mpi_code)
#else /* H5_MPI_FILE_SET_SIZE_BIG */
/* Wait until all processes are here before reading/writing the byte at
* process 0's end of address space. The window for corruption is
* probably tiny, but does exist...
*/
if(MPI_SUCCESS != (mpi_code = MPI_Barrier(file->comm)))
HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_code)
if(0 == file->mpi_rank) {
uint8_t byte = 0;
MPI_Status mpi_stat;
/* Portably initialize MPI status variable */
HDmemset(&mpi_stat, 0, sizeof(MPI_Status));
if(H5FD_mpi_haddr_to_MPIOff(file->eoa-1, &mpi_off) < 0)
HGOTO_ERROR(H5E_INTERNAL, H5E_BADRANGE, FAIL, "cannot convert from haddr_t to MPI_Offset")
if(MPI_SUCCESS != (mpi_code = MPI_File_read_at(file->f, mpi_off, &byte, 1, MPI_BYTE, &mpi_stat)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_read_at failed", mpi_code)
if(MPI_SUCCESS != (mpi_code = MPI_File_write_at(file->f, mpi_off, &byte, 1, MPI_BYTE, &mpi_stat)))
HMPI_GOTO_ERROR(FAIL, "MPI_File_write_at failed", mpi_code)
} /* end if */
#endif /* H5_MPI_FILE_SET_SIZE_BIG */
/* Don't let any proc return until all have extended the file.
* (Prevents race condition where some processes go ahead and write
* more data to the file before all the processes have finished making
* it the shorter length, potentially truncating the file and dropping
* the new data written)
*/
if(MPI_SUCCESS != (mpi_code = MPI_Barrier(file->comm)))
HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_code)
/* Update the 'last' eoa value */
file->last_eoa = file->eoa;
} /* end if */
done:
#ifdef H5FDmpio_DEBUG
if(H5FD_mpio_Debug[(int)'t'])
HDfprintf(stdout, "Leaving %s\n", FUNC);
#endif
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5FD_mpio_truncate() */
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_mpi_rank
*
* Purpose: Returns the MPI rank for a process
*
* Return: Success: non-negative
* Failure: negative
*
* Programmer: Quincey Koziol
* Thursday, May 16, 2002
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static int
H5FD_mpio_mpi_rank(const H5FD_t *_file)
{
const H5FD_mpio_t *file = (const H5FD_mpio_t*)_file;
FUNC_ENTER_NOAPI_NOINIT_NOERR
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
FUNC_LEAVE_NOAPI(file->mpi_rank)
} /* end H5FD_mpio_mpi_rank() */
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_mpi_size
*
* Purpose: Returns the number of MPI processes
*
* Return: Success: non-negative
* Failure: negative
*
* Programmer: Quincey Koziol
* Thursday, May 16, 2002
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static int
H5FD_mpio_mpi_size(const H5FD_t *_file)
{
const H5FD_mpio_t *file = (const H5FD_mpio_t*)_file;
FUNC_ENTER_NOAPI_NOINIT_NOERR
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
FUNC_LEAVE_NOAPI(file->mpi_size)
} /* end H5FD_mpio_mpi_size() */
/*-------------------------------------------------------------------------
* Function: H5FD_mpio_communicator
*
* Purpose: Returns the MPI communicator for the file.
*
* Return: Success: The communicator
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Monday, August 9, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static MPI_Comm
H5FD_mpio_communicator(const H5FD_t *_file)
{
const H5FD_mpio_t *file = (const H5FD_mpio_t*)_file;
FUNC_ENTER_NOAPI_NOINIT_NOERR
assert(file);
assert(H5FD_MPIO==file->pub.driver_id);
FUNC_LEAVE_NOAPI(file->comm)
}
#endif /* H5_HAVE_PARALLEL */
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