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gridcomm.h
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Fri, May 24, 18:29
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rLAMMPS lammps
gridcomm.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.
------------------------------------------------------------------------- */
#ifndef LMP_GRIDCOMM_H
#define LMP_GRIDCOMM_H
#include "pointers.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
namespace
LAMMPS_NS
{
class
GridComm
:
protected
Pointers
{
public:
GridComm
(
class
LAMMPS
*
,
MPI_Comm
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
);
GridComm
(
class
LAMMPS
*
,
MPI_Comm
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
,
int
);
~
GridComm
();
void
ghost_notify
();
int
ghost_overlap
();
void
setup
();
void
forward_comm
(
class
KSpace
*
,
int
);
void
reverse_comm
(
class
KSpace
*
,
int
);
double
memory_usage
();
private:
int
me
;
int
nforward
,
nreverse
;
MPI_Comm
gridcomm
;
MPI_Request
request
;
// in = inclusive indices of 3d grid chunk that I own
// out = inclusive indices of 3d grid chunk I own plus ghosts I use
// proc = 6 neighbor procs that surround me
// ghost = # of my owned grid planes needed from me
// by each of 6 neighbor procs to become their ghost planes
int
inxlo
,
inxhi
,
inylo
,
inyhi
,
inzlo
,
inzhi
;
int
outxlo
,
outxhi
,
outylo
,
outyhi
,
outzlo
,
outzhi
;
int
outxlo_max
,
outxhi_max
,
outylo_max
,
outyhi_max
,
outzlo_max
,
outzhi_max
;
int
procxlo
,
procxhi
,
procylo
,
procyhi
,
proczlo
,
proczhi
;
int
ghostxlo
,
ghostxhi
,
ghostylo
,
ghostyhi
,
ghostzlo
,
ghostzhi
;
int
nbuf
;
FFT_SCALAR
*
buf1
,
*
buf2
;
struct
Swap
{
int
sendproc
;
// proc to send to for forward comm
int
recvproc
;
// proc to recv from for forward comm
int
npack
;
// # of datums to pack
int
nunpack
;
// # of datums to unpack
int
*
packlist
;
// 3d array offsets to pack
int
*
unpacklist
;
// 3d array offsets to unpack
};
int
nswap
;
Swap
*
swap
;
int
indices
(
int
*&
,
int
,
int
,
int
,
int
,
int
,
int
);
};
}
#endif
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