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remap.h
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Mon, Sep 2, 23:08
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rLAMMPS lammps
remap.h
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/* -*- c++ -*- ----------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
#include <mpi.h>
#ifdef FFT_SINGLE
typedef
float
FFT_SCALAR
;
#define MPI_FFT_SCALAR MPI_FLOAT
#else
typedef
double
FFT_SCALAR
;
#define MPI_FFT_SCALAR MPI_DOUBLE
#endif
// details of how to do a 3d remap
struct
remap_plan_3d
{
FFT_SCALAR
*
sendbuf
;
// buffer for MPI sends
FFT_SCALAR
*
scratch
;
// scratch buffer for MPI recvs
void
(
*
pack
)(
FFT_SCALAR
*
,
FFT_SCALAR
*
,
struct
pack_plan_3d
*
);
// which pack function to use
void
(
*
unpack
)(
FFT_SCALAR
*
,
FFT_SCALAR
*
,
struct
pack_plan_3d
*
);
// which unpack function to use
int
*
send_offset
;
// extraction loc for each send
int
*
send_size
;
// size of each send message
int
*
send_proc
;
// proc to send each message to
struct
pack_plan_3d
*
packplan
;
// pack plan for each send message
int
*
recv_offset
;
// insertion loc for each recv
int
*
recv_size
;
// size of each recv message
int
*
recv_proc
;
// proc to recv each message from
int
*
recv_bufloc
;
// offset in scratch buf for each recv
MPI_Request
*
request
;
// MPI request for each posted recv
struct
pack_plan_3d
*
unpackplan
;
// unpack plan for each recv message
int
nrecv
;
// # of recvs from other procs
int
nsend
;
// # of sends to other procs
int
self
;
// whether I send/recv with myself
int
memory
;
// user provides scratch space or not
MPI_Comm
comm
;
// group of procs performing remap
int
usecollective
;
// use collective or point-to-point MPI
int
commringlen
;
// length of commringlist
int
*
commringlist
;
// ranks on communication ring of this plan
};
// collision between 2 regions
struct
extent_3d
{
int
ilo
,
ihi
,
isize
;
int
jlo
,
jhi
,
jsize
;
int
klo
,
khi
,
ksize
;
};
// function prototypes
void
remap_3d
(
FFT_SCALAR
*
,
FFT_SCALAR
*
,
FFT_SCALAR
*
,
struct
remap_plan_3d
*
);
struct
remap_plan_3d
*
remap_3d_create_plan
(
MPI_Comm
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
);
void
remap_3d_destroy_plan
(
struct
remap_plan_3d
*
);
int
remap_3d_collide
(
struct
extent_3d
*
,
struct
extent_3d
*
,
struct
extent_3d
*
);
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