pnetcdf_io.cpp File Reference

#include <pnetcdf.h>
#include <cstdlib>
#include <string>
#include <iostream>

Functions
void	read_pnetcdf (const std::string &filename, MPI_Offset starts[3], MPI_Offset counts[3], int gsizes[3], double *localData)
void	write_pnetcdf (const std::string &filename, MPI_Offset starts[3], MPI_Offset counts[3], int gsizes[3], double *localData)

Detailed Description

For Parallel-netCDF support

Function Documentation

void read_pnetcdf	(	const std::string &	filename,
		MPI_Offset	starts[3],
		MPI_Offset	counts[3],
		int	gsizes[3],
		double *	localData
	)

Read a parallel-nedcdf file.

We assume here that localData is a scalar.

Pnetcdf uses row-major format (same as FFTW).

Parameters

[in]	filename	: PnetCDF filename
[in]	starts	: offset to where to start reading data
[in]	counts	: number of elements read (3D sub-domain inside global)
[in]	gsizes	: global sizes
[out]	localData	: actual data buffer (size : nx*ny*nz*sizeof(double))

localData must have been allocated prior to calling this routine.

void write_pnetcdf	(	const std::string &	filename,
		MPI_Offset	starts[3],
		MPI_Offset	counts[3],
		int	gsizes[3],
		double *	localData
	)

Write a parallel-nedcdf file.

We assume here that localData is a scalar.

Pnetcdf uses row-major format (same as FFTW).

Parameters

[in]	filename	: PnetCDF filename
[in]	starts	: offset to where to start reading data
[in]	counts	: number of elements read (3D sub-domain inside global)
[in]	gsizes	: global sizes
[in]	localData	: actual data buffer (size : nx*ny*nz*sizeof(double))