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lammps/src/comm.h
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comm.h
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/* ----------------------------------------------------------------------
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; // current proc domains: 0 = logical bricks, 1 = general tiling
// can do style=1 on layout=0, but not vice versa
int me,nprocs; // proc info
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
int ghost_velocity; // 1 if ghost atoms have velocity, 0 if not
int uniform; // 1 = equal subdomains, 0 = load-balanced
double *xsplit,*ysplit,*zsplit; // fractional (0-1) sub-domain sizes
double cutghost[3]; // cutoffs used for acquiring ghost atoms
double cutghostuser; // user-specified ghost cutoff
int ***grid2proc; // which proc owns i,j,k loc in 3d grid
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
Comm(class LAMMPS *);
virtual ~Comm();
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 init() = 0;
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 *) = 0;
virtual void reverse_comm_fix(class Fix *) = 0;
virtual void forward_comm_variable_fix(class Fix *) = 0;
virtual void reverse_comm_variable_fix(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;
virtual bigint memory_usage() = 0;
// non-virtual functions common to all Comm styles
void ring(int, int, void *, int, void (*)(int, char *),
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 mode; // 0 = single cutoff, 1 = multi-type cutoff
int bordergroup; // only communicate this group in borders
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:
*/
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