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rLAMMPS lammps
comm.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_COMM_H
#define LMP_COMM_H
#include "pointers.h"
namespace
LAMMPS_NS
{
class
Comm
:
protected
Pointers
{
public:
int
style
;
// comm pattern: 0 = 6-way stencil, 1 = irregular tiling
int
layout
;
// LAYOUT_UNIFORM = equal-sized bricks
// LAYOUT_NONUNIFORM = logical bricks, but diff sizes via LB
// LAYOUT_TILED = general tiling, due to RCB LB
int
mode
;
// 0 = single cutoff, 1 = multi-type cutoff
int
me
,
nprocs
;
// proc info
int
ghost_velocity
;
// 1 if ghost atoms have velocity, 0 if not
double
cutghost
[
3
];
// cutoffs used for acquiring ghost atoms
double
cutghostuser
;
// user-specified ghost cutoff (mode == 0)
double
*
cutusermulti
;
// per type user ghost cutoff (mode == 1)
int
recv_from_partition
;
// recv proc layout from this partition
int
send_to_partition
;
// send my proc layout to this partition
// -1 if no recv or send
int
other_partition_style
;
// 0 = recv layout dims must be multiple of
// my layout dims
int
maxexchange_atom
;
// max contribution to exchange from AtomVec
int
maxexchange_fix
;
// max contribution to exchange from Fixes
int
nthreads
;
// OpenMP threads per MPI process
// public settings specific to layout = UNIFORM, NONUNIFORM
int
procgrid
[
3
];
// procs assigned in each dim of 3d grid
int
user_procgrid
[
3
];
// user request for procs in each dim
int
myloc
[
3
];
// which proc I am in each dim
int
procneigh
[
3
][
2
];
// my 6 neighboring procs, 0/1 = left/right
double
*
xsplit
,
*
ysplit
,
*
zsplit
;
// fractional (0-1) sub-domain sizes
int
***
grid2proc
;
// which proc owns i,j,k loc in 3d grid
// public settings specific to layout = TILED
int
rcbnew
;
// 1 if just reset by rebalance, else 0
double
mysplit
[
3
][
2
];
// fractional (0-1) bounds of my sub-domain
double
rcbcutfrac
;
// fractional RCB cut by this proc
int
rcbcutdim
;
// dimension of RCB cut
// methods
Comm
(
class
LAMMPS
*
);
virtual
~
Comm
();
// NOTE: copy_arrays is called from a constructor and must not be made virtual
void
copy_arrays
(
class
Comm
*
);
virtual
void
init
();
void
modify_params
(
int
,
char
**
);
void
set_processors
(
int
,
char
**
);
// set 3d processor grid attributes
virtual
void
set_proc_grid
(
int
outflag
=
1
);
// setup 3d grid of procs
virtual
void
setup
()
=
0
;
// setup 3d comm pattern
virtual
void
forward_comm
(
int
dummy
=
0
)
=
0
;
// forward comm of atom coords
virtual
void
reverse_comm
()
=
0
;
// reverse comm of forces
virtual
void
exchange
()
=
0
;
// move atoms to new procs
virtual
void
borders
()
=
0
;
// setup list of atoms to comm
// forward/reverse comm from a Pair, Fix, Compute, Dump
virtual
void
forward_comm_pair
(
class
Pair
*
)
=
0
;
virtual
void
reverse_comm_pair
(
class
Pair
*
)
=
0
;
virtual
void
forward_comm_fix
(
class
Fix
*
,
int
size
=
0
)
=
0
;
virtual
void
reverse_comm_fix
(
class
Fix
*
,
int
size
=
0
)
=
0
;
virtual
void
reverse_comm_fix_variable
(
class
Fix
*
)
=
0
;
virtual
void
forward_comm_compute
(
class
Compute
*
)
=
0
;
virtual
void
reverse_comm_compute
(
class
Compute
*
)
=
0
;
virtual
void
forward_comm_dump
(
class
Dump
*
)
=
0
;
virtual
void
reverse_comm_dump
(
class
Dump
*
)
=
0
;
// forward comm of an array
// exchange of info on neigh stencil
// set processor mapping options
virtual
void
forward_comm_array
(
int
,
double
**
)
=
0
;
virtual
int
exchange_variable
(
int
,
double
*
,
double
*&
)
=
0
;
int
binary
(
double
,
int
,
double
*
);
// map a point to a processor, based on current decomposition
virtual
void
coord2proc_setup
()
{}
virtual
int
coord2proc
(
double
*
,
int
&
,
int
&
,
int
&
);
// memory usage
virtual
bigint
memory_usage
()
=
0
;
// non-virtual functions common to all Comm styles
void
ring
(
int
,
int
,
void
*
,
int
,
void
(
*
)(
int
,
char
*
,
void
*
),
void
*
,
void
*
,
int
self
=
1
);
int
read_lines_from_file
(
FILE
*
,
int
,
int
,
char
*
);
int
read_lines_from_file_universe
(
FILE
*
,
int
,
int
,
char
*
);
protected:
int
bordergroup
;
// only communicate this group in borders
int
triclinic
;
// 0 if domain is orthog, 1 if triclinic
int
map_style
;
// non-0 if global->local mapping is done
int
comm_x_only
,
comm_f_only
;
// 1 if only exchange x,f in for/rev comm
int
size_forward
;
// # of per-atom datums in forward comm
int
size_reverse
;
// # of datums in reverse comm
int
size_border
;
// # of datums in forward border comm
int
maxforward
,
maxreverse
;
// max # of datums in forward/reverse comm
int
maxexchange
;
// max # of datums/atom in exchange comm
int
gridflag
;
// option for creating 3d grid
int
mapflag
;
// option for mapping procs to 3d grid
char
xyz
[
4
];
// xyz mapping of procs to 3d grid
char
*
customfile
;
// file with custom proc map
char
*
outfile
;
// proc grid/map output file
int
otherflag
;
// 1 if this partition dependent on another
int
other_style
;
// style of dependency
int
other_procgrid
[
3
];
// proc layout of another partition
int
other_coregrid
[
3
];
// core layout of another partition
int
ncores
;
// # of cores per node
int
coregrid
[
3
];
// 3d grid of cores within a node
int
user_coregrid
[
3
];
// user request for cores in each dim
};
}
#endif
/* ERROR/WARNING messages:
W: OMP_NUM_THREADS environment is not set.
This environment variable must be set appropriately to use the
USER-OMP package.
E: Illegal ... command
Self-explanatory. Check the input script syntax and compare to the
documentation for the command. You can use -echo screen as a
command-line option when running LAMMPS to see the offending line.
E: Invalid group in comm_modify command
Self-explanatory.
E: Comm_modify group != atom_modify first group
Self-explanatory.
E: Use cutoff/multi keyword to set cutoff in multi mode
Mode is multi so cutoff keyword cannot be used.
E: Invalid cutoff in comm_modify command
Specified cutoff must be >= 0.0.
E: Use cutoff keyword to set cutoff in single mode
Mode is single so cutoff/multi keyword cannot be used.
E: Cannot set cutoff/multi before simulation box is defined
Self-explanatory.
E: Specified processors != physical processors
The 3d grid of processors defined by the processors command does not
match the number of processors LAMMPS is being run on.
E: Cannot use processors part command without using partitions
See the command-line -partition switch.
E: Invalid partitions in processors part command
Valid partitions are numbered 1 to N and the sender and receiver
cannot be the same partition.
E: Sending partition in processors part command is already a sender
Cannot specify a partition to be a sender twice.
E: Receiving partition in processors part command is already a receiver
Cannot specify a partition to be a receiver twice.
E: Processors grid numa and map style are incompatible
Using numa for gstyle in the processors command requires using
cart for the map option.
E: Processors part option and grid style are incompatible
Cannot use gstyle numa or custom with the part option.
E: Bad grid of processors
The 3d grid of processors defined by the processors command does not
match the number of processors LAMMPS is being run on.
E: Processor count in z must be 1 for 2d simulation
Self-explanatory.
*/
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