MPI+OpenMP Parallel API

Open (and close) SIONlib files from multiple OpenMP threads on on multiple MPI processes in parallel. More...

Functions
int	sion_paropen_ompi (const char *fname, const char *file_mode, int *numFiles, MPI_Comm gComm, const MPI_Comm *lComm, int64_t *chunksize, int32_t *fsblksize, int *globalrank, FILE **fileptr, char **newfname)
	Open a sion file using OpenMP/MPI. More...
int	sion_parclose_ompi (int sid)
	closes a SION file previously opened in OpenMP/MPI mode More...

Detailed Description

Open (and close) SIONlib files from multiple OpenMP threads on on multiple MPI processes in parallel.

See also

API Overview

Function Documentation

sion_parclose_ompi()

int sion_parclose_ompi

(

int

sid

)

closes a SION file previously opened in OpenMP/MPI mode

Parameters

[in]

*sid

SION file id

Definition at line 264 of file sion_ompi_gen.c.

sion_paropen_ompi()

int sion_paropen_ompi	(	const char *	fname,
		const char *	file_mode,
		int *	numFiles,
		MPI_Comm	gComm,
		const MPI_Comm *	lComm,
		int64_t *	chunksize,
		int32_t *	fsblksize,
		int *	globalrank,
		FILE **	fileptr,
		char **	newfname
	)

Open a sion file using OpenMP/MPI.

This function opens a sion file using OpenMP/MPI. It processes the OpenMP/MPI specific parts and then passes its arguments on to sion_generic_paropen().

Parameters

[in]	fname	name of file, should be equal on all tasks
[in]	file_mode	like the type parameter of fopen (currently recognized options: "rb", "wb")
[in,out]	numFiles	number of multi files to use (-1 for automatic choosing from local communicator)
[in]	gComm	global communicator
[in]	lComm	local communicator (= gComm if no adaption to I/O nodes is needed)
[in,out]	chunksize	maximum size to be written with single write call
[in,out]	fsblksize	file system block size (-1 for automatic)
[in,out]	globalrank	global rank of process
[in,out]	fileptr	file pointer (NULL for not using an external file pointer)
[out]	newfname	return value for actual file name if using multi files

Return values

sid	sion file handle or -1 if error occured

Definition at line 51 of file sion_ompi_gen.c.

References sion_lock_register_lock_callbacks().