/usr/include/sfftw_mpi.h is in sfftw-dev 2.1.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 1997-1999, 2003 Massachusetts Institute of Technology
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef FFTW_MPI_H
#define FFTW_MPI_H
#include "sfftw.h"
#include <mpi.h> /* need access to the MPI type definitions */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/***********************************************************************/
typedef fftw_real TRANSPOSE_EL_TYPE;
typedef struct {
int block_num, dest_pe, send_size, recv_size;
} transpose_mpi_exchange;
typedef struct {
MPI_Comm comm;
int n_pes, my_pe;
int nx,ny,local_nx,local_ny;
transpose_mpi_exchange *exchange;
int num_steps, send_block_size, recv_block_size;
MPI_Datatype el_type;
MPI_Request request[2];
int *perm_block_dest;
int num_perm_blocks, perm_block_size;
int all_blocks_equal;
int *send_block_sizes, *send_block_offsets;
int *recv_block_sizes, *recv_block_offsets;
char *move;
int move_size;
} transpose_mpi_plan_struct;
typedef transpose_mpi_plan_struct *transpose_mpi_plan;
extern void transpose_mpi_get_local_size(int n, int my_pe, int n_pes,
int *local_n, int *local_start);
extern int transpose_mpi_get_local_storage_size(int nx, int ny,
int my_pe, int n_pes);
extern transpose_mpi_plan transpose_mpi_create_plan(int nx, int ny,
MPI_Comm comm);
extern void transpose_mpi_destroy_plan(transpose_mpi_plan p);
extern void transpose_mpi(transpose_mpi_plan p, int el_size,
TRANSPOSE_EL_TYPE *local_data,
TRANSPOSE_EL_TYPE *work);
typedef enum { BEFORE_TRANSPOSE, AFTER_TRANSPOSE } transpose_in_place_which;
typedef enum { TRANSPOSE_SYNC, TRANSPOSE_ASYNC } transpose_sync_type;
extern void transpose_in_place_local(transpose_mpi_plan p,
int el_size, TRANSPOSE_EL_TYPE *local_data,
transpose_in_place_which which);
extern TRANSPOSE_EL_TYPE *transpose_allocate_send_buf(transpose_mpi_plan p,
int el_size);
extern void transpose_get_send_block(transpose_mpi_plan p, int step,
int *block_y_start, int *block_ny);
extern void transpose_start_exchange_step(transpose_mpi_plan p,
int el_size,
TRANSPOSE_EL_TYPE *local_data,
TRANSPOSE_EL_TYPE *send_buf,
int step,
transpose_sync_type sync_type);
extern void transpose_finish_exchange_step(transpose_mpi_plan p, int step);
/***********************************************************************/
typedef struct {
fftw_plan p_fft_x; /* plan for first dimension */
fftwnd_plan p_fft; /* plan for subsequent dimensions */
transpose_mpi_plan p_transpose, p_transpose_inv;
fftw_complex *work; /* extra workspace, if needed */
} fftwnd_mpi_plan_data;
typedef fftwnd_mpi_plan_data *fftwnd_mpi_plan;
typedef enum {
FFTW_NORMAL_ORDER,
FFTW_TRANSPOSED_ORDER
} fftwnd_mpi_output_order;
extern fftwnd_mpi_plan fftwnd_mpi_create_plan(MPI_Comm comm,
int rank, const int *n,
fftw_direction dir,
int flags);
extern fftwnd_mpi_plan fftw2d_mpi_create_plan(MPI_Comm comm,
int nx, int ny,
fftw_direction dir, int flags);
extern fftwnd_mpi_plan fftw3d_mpi_create_plan(MPI_Comm comm,
int nx, int ny, int nz,
fftw_direction dir, int flags);
extern void fftwnd_mpi_destroy_plan(fftwnd_mpi_plan p);
extern void fftwnd_mpi_local_sizes(fftwnd_mpi_plan p,
int *local_nx,
int *local_x_start,
int *local_ny_after_transpose,
int *local_y_start_after_transpose,
int *total_local_size);
extern void fftwnd_mpi(fftwnd_mpi_plan p,
int n_fields,
fftw_complex *local_data, fftw_complex *work,
fftwnd_mpi_output_order output_order);
extern void fftw_mpi_die(const char *error_string);
/***********************************************************************/
typedef struct fftw_mpi_twiddle_struct {
int rows, rowstart, cols, n;
fftw_complex *W;
int refcount;
struct fftw_mpi_twiddle_struct *next;
} fftw_mpi_twiddle;
typedef struct fftw_mpi_plan_struct {
int n, m, r, local_m, local_m_start, local_r, local_r_start;
fftw_complex *fft_work;
fftw_mpi_twiddle *tw;
transpose_mpi_plan p_transpose, p_transpose_inv;
fftw_plan pm, pr;
int flags;
fftw_direction dir;
} *fftw_mpi_plan;
/* new flags for the MPI planner: */
#define FFTW_SCRAMBLED_INPUT (8192)
#define FFTW_SCRAMBLED_OUTPUT (16384)
extern void fftw_mpi_local_sizes(fftw_mpi_plan p,
int *local_n,
int *local_start,
int *local_n_after_transform,
int *local_start_after_transform,
int *total_local_size);
extern fftw_mpi_plan fftw_mpi_create_plan(MPI_Comm comm,
int n,
fftw_direction dir, int flags);
extern void fftw_mpi_destroy_plan(fftw_mpi_plan p);
extern void fftw_mpi(fftw_mpi_plan p, int n_fields,
fftw_complex *local_data, fftw_complex *work);
extern void fftw_mpi_print_plan(fftw_mpi_plan p);
/***********************************************************************/
#ifdef __cplusplus
} /* extern "C" */
#endif /* __cplusplus */
#endif /* FFTW_MPI_H */
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