accfft_common.cpp File Reference

#include <mpi.h>
#include <omp.h>
#include <iostream>
#include <cmath>
#include <math.h>
#include "accfft_common.h"

Functions
void *	accfft_alloc (ptrdiff_t size)
void	accfft_free (void *ptr)
void	accfft_create_comm (MPI_Comm in_comm, int *c_dims, MPI_Comm *c_comm)
int	accfft_init ()
int	accfft_init (int nthreads)
void	accfft_cleanup ()

Detailed Description

common functions in AccFFT.

Function Documentation

void* accfft_alloc

(

ptrdiff_t

size

)

Allocates aligned memory to enable SIMD

Parameters

size	Allocation size in Bytes

void accfft_cleanup

(

)

Cleanup all CPU resources

void accfft_create_comm	(	MPI_Comm	in_comm,
		int *	c_dims,
		MPI_Comm *	c_comm
	)

Creates a Cartesian communicator of size c_dims[0]xc_dims[1] from its input. If c_dims[0]xc_dims[1] would not match the size of in_comm, then the function prints an error and automatically sets c_dims to the correct values.

Parameters

in_comm	Input MPI communicator handle
c_dims	A 2D integer array, which sets the size of the Cartesian array to c_dims[0]xc_dims[1]
c_comm	A pointer to the Cartesian communicator which will be created

void accfft_free

(

void *

ptr

)

Free memory allocated by accfft_alloc

Parameters

ptr	Address of the memory to be freed.

int accfft_init

(

)

Initialize AccFFT library.

Returns

0 if successful.

int accfft_init

(

int

nthreads

)

Initializes the library.

Parameters

nthreads

The number of OpenMP threads to use for execution of local FFT.

Returns

0 if successful