git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@3251 f3b2605a-c512-4ea7-a41b-209d697bcdaa

This commit is contained in:
sjplimp 2009-10-29 22:45:27 +00:00
parent 5ae416a787
commit 7585871534
13 changed files with 1400 additions and 56 deletions

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@ -14,7 +14,7 @@ OBJ = $(SRC:.cpp=.o)
# Package variables
PACKAGE = asphere class2 colloid dipole dpd gpu granular \
kspace manybody meam molecule opt peri poems reax xtc
kspace manybody meam molecule opt peri poems prd reax xtc
PACKUSER = user-ackland user-atc user-cg-cmm user-ewaldn user-smd

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@ -1,9 +1,9 @@
# Settings for libraries used by specific LAMMPS packages
# this file is auto-edited when those packages are included/excluded
PKG_INC = -I../../lib/atc -I../../lib/reax -I../../lib/poems -I../../lib/meam
PKG_PATH = -L../../lib/atc -L../../lib/reax -L../../lib/poems -L../../lib/meam -L../../lib/gpu
PKG_LIB = -latc -lreax -lpoems -lmeam -lgpu
PKG_INC = -I../../lib/reax -I../../lib/poems -I../../lib/meam
PKG_PATH = -L../../lib/reax -L../../lib/poems -L../../lib/meam
PKG_LIB = -lreax -lpoems -lmeam
PKG_SYSPATH = $(user-atc_SYSPATH) $(reax_SYSPATH) $(meam_SYSPATH) $(gpu_SYSPATH)
PKG_SYSLIB = $(user-atc_SYSLIB) $(reax_SYSLIB) $(meam_SYSLIB) $(gpu_SYSLIB)
PKG_SYSPATH = $(reax_SYSPATH) $(meam_SYSPATH)
PKG_SYSLIB = $(reax_SYSLIB) $(meam_SYSLIB)

28
src/PRD/Install.csh Normal file
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# Install/unInstall package classes in LAMMPS
if ($1 == 1) then
cp style_prd.h ..
cp compute_event_displace.cpp ..
cp fix_event.cpp ..
cp prd.cpp ..
cp compute_event_displace.h ..
cp fix_event.h ..
cp prd.h ..
else if ($1 == 0) then
rm ../style_prd.h
touch ../style_prd.h
rm ../compute_event_displace.cpp
rm ../fix_event.cpp
rm ../prd.cpp
rm ../compute_event_displace.h
rm ../fix_event.h
rm ../prd.h
endif

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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.
------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
Contributing author: Mike Brown (SNL)
------------------------------------------------------------------------- */
#include "math.h"
#include "stdlib.h"
#include "string.h"
#include "compute_event_displace.h"
#include "atom.h"
#include "domain.h"
#include "modify.h"
#include "fix.h"
#include "memory.h"
#include "error.h"
#include "update.h"
using namespace LAMMPS_NS;
#define INVOKED_SCALAR 1
/* ---------------------------------------------------------------------- */
ComputeEventDisplace::ComputeEventDisplace(LAMMPS *lmp, int narg, char **arg) :
Compute(lmp, narg, arg)
{
if (narg != 4) error->all("Illegal compute event/displace command");
scalar_flag = 1;
extscalar = 0;
double displace_dist = atof(arg[3]);
if (displace_dist <= 0.0)
error->all("Distnace must be > 0 for compute event/displace");
displace_distsq = displace_dist * displace_dist;
// fix event ID will be set later by PRD
id_event = NULL;
}
/* ---------------------------------------------------------------------- */
ComputeEventDisplace::~ComputeEventDisplace()
{
delete [] id_event;
}
/* ---------------------------------------------------------------------- */
void ComputeEventDisplace::init()
{
// set fix which stores original atom coords
// check if is correct style
if (id_event == NULL)
error->all("Compute event/displace has not had fix event assigned");
int ifix = modify->find_fix(id_event);
if (ifix < 0) error->all("Could not find compute event/displace fix ID");
fix = modify->fix[ifix];
if (strcmp(fix->style,"EVENT") != 0)
error->all("Compute event/displace has invalid fix event assigned");
triclinic = domain->triclinic;
}
/* ----------------------------------------------------------------------
return non-zero if an atom has moved > displace_dist since last event
------------------------------------------------------------------------- */
double ComputeEventDisplace::compute_scalar()
{
invoked_scalar = update->ntimestep;
double event = 0.0;
double **xevent = fix->vector_atom;
double **x = atom->x;
int *mask = atom->mask;
int *image = atom->image;
int nlocal = atom->nlocal;
double *h = domain->h;
double xprd = domain->xprd;
double yprd = domain->yprd;
double zprd = domain->zprd;
int xbox,ybox,zbox;
double dx,dy,dz,rsq;
if (triclinic == 0) {
for (int i = 0; i < nlocal; i++)
if (mask[i] & groupbit) {
xbox = (image[i] & 1023) - 512;
ybox = (image[i] >> 10 & 1023) - 512;
zbox = (image[i] >> 20) - 512;
dx = x[i][0] + xbox*xprd - xevent[i][0];
dy = x[i][1] + ybox*yprd - xevent[i][1];
dz = x[i][2] + zbox*zprd - xevent[i][2];
rsq = dx*dx + dy*dy + dz*dz;
if (rsq >= displace_distsq) {
event = 1.0;
break;
}
}
} else {
for (int i = 0; i < nlocal; i++)
if (mask[i] & groupbit) {
xbox = (image[i] & 1023) - 512;
ybox = (image[i] >> 10 & 1023) - 512;
zbox = (image[i] >> 20) - 512;
dx = x[i][0] + h[0]*xbox + h[5]*ybox + h[4]*zbox - xevent[i][0];
dy = x[i][1] + h[1]*ybox + h[3]*zbox - xevent[i][1];
dz = x[i][2] + h[2]*zbox - xevent[i][2];
rsq = dx*dx + dy*dy + dz*dz;
if (rsq >= displace_distsq) {
event = 1.0;
break;
}
}
}
MPI_Allreduce(&event,&scalar,1,MPI_DOUBLE,MPI_SUM,world);
return scalar;
}
/* ---------------------------------------------------------------------- */
void ComputeEventDisplace::reset_extra_compute_fix(char *id_new)
{
delete [] id_event;
int n = strlen(id_new) + 1;
id_event = new char[n];
strcpy(id_event,id_new);
}

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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 COMPUTE_EVENT_DISPLACE_H
#define COMPUTE_EVENT_DISPLACE_H
#include "compute.h"
namespace LAMMPS_NS {
class ComputeEventDisplace : public Compute {
public:
ComputeEventDisplace(class LAMMPS *, int, char **);
~ComputeEventDisplace();
void init();
double compute_scalar();
void reset_extra_compute_fix(char *);
private:
int triclinic;
double displace_distsq;
char *id_event;
class Fix *fix;
};
}
#endif

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src/PRD/fix_event.cpp Normal file
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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.
------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
Contributing author: Mike Brown (SNL)
------------------------------------------------------------------------- */
#include "stdlib.h"
#include "string.h"
#include "fix_event.h"
#include "atom.h"
#include "update.h"
#include "domain.h"
#include "neighbor.h"
#include "comm.h"
#include "universe.h"
#include "memory.h"
#include "error.h"
using namespace LAMMPS_NS;
/* ---------------------------------------------------------------------- */
FixEvent::FixEvent(LAMMPS *lmp, int narg, char **arg) :
Fix(lmp, narg, arg)
{
if (narg != 3) error->all("Illegal fix event command");
restart_global = 1;
// perform initial allocation of atom-based array
// register with Atom class
xevent = NULL;
xold = NULL;
imageold = NULL;
grow_arrays(atom->nmax);
atom->add_callback(0);
event_number = 0;
event_timestep = 0;
clock = 0;
}
/* ---------------------------------------------------------------------- */
FixEvent::~FixEvent()
{
// unregister callbacks to this fix from Atom class
atom->delete_callback(id,0);
// delete locally stored array
memory->destroy_2d_double_array(xevent);
memory->destroy_2d_double_array(xold);
memory->sfree(imageold);
}
/* ---------------------------------------------------------------------- */
int FixEvent::setmask()
{
return 0;
}
/* ----------------------------------------------------------------------
save current atom coords as an event
called when an event occurs in some replica
set event_timestep = when event occurred in a particular replica
update clock = elapsed time since last event, across all replicas
------------------------------------------------------------------------- */
void FixEvent::store_event(int timestep, int delta_clock)
{
double **x = atom->x;
int *image = atom->image;
int nlocal = atom->nlocal;
for (int i = 0; i < nlocal; i++)
domain->unmap(x[i],image[i],xevent[i]);
event_timestep = timestep;
clock += delta_clock;
event_number++;
}
/* ----------------------------------------------------------------------
store state of all atoms
called before quench and subsequent check for event
so can later restore pre-quench state if no event occurs
------------------------------------------------------------------------- */
void FixEvent::store_state()
{
double **x = atom->x;
double **f = atom->f;
int *image = atom->image;
int nlocal = atom->nlocal;
for (int i = 0; i < nlocal; i++) {
xold[i][0] = x[i][0];
xold[i][1] = x[i][1];
xold[i][2] = x[i][2];
imageold[i] = image[i];
}
}
/* ----------------------------------------------------------------------
restore state of all atoms to pre-quench state
called after no event detected so can continue
------------------------------------------------------------------------- */
void FixEvent::restore_state()
{
double **x = atom->x;
int *image = atom->image;
int nlocal = atom->nlocal;
for (int i = 0; i < nlocal; i++) {
x[i][0] = xold[i][0];
x[i][1] = xold[i][1];
x[i][2] = xold[i][2];
image[i] = imageold[i];
}
}
/* ----------------------------------------------------------------------
memory usage of local atom-based array
------------------------------------------------------------------------- */
double FixEvent::memory_usage()
{
double bytes = 6*atom->nmax * sizeof(double);
bytes += atom->nmax*sizeof(int);
return bytes;
}
/* ----------------------------------------------------------------------
allocate atom-based array
------------------------------------------------------------------------- */
void FixEvent::grow_arrays(int nmax)
{
xevent = memory->grow_2d_double_array(xevent,nmax,3,"event:xevent");
xold = memory->grow_2d_double_array(xold,nmax,3,"event:xold");
imageold = (int *)
memory->srealloc(imageold,nmax*sizeof(int),"event:imageold");
// allow compute event to access stored event coords
vector_atom = xevent;
}
/* ----------------------------------------------------------------------
copy values within local atom-based array
------------------------------------------------------------------------- */
void FixEvent::copy_arrays(int i, int j)
{
xevent[j][0] = xevent[i][0];
xevent[j][1] = xevent[i][1];
xevent[j][2] = xevent[i][2];
xold[j][0] = xold[i][0];
xold[j][1] = xold[i][1];
xold[j][2] = xold[i][2];
imageold[j] = imageold[i];
}
/* ----------------------------------------------------------------------
pack values in local atom-based array for exchange with another proc
------------------------------------------------------------------------- */
int FixEvent::pack_exchange(int i, double *buf)
{
buf[0] = xevent[i][0];
buf[1] = xevent[i][1];
buf[2] = xevent[i][2];
buf[3] = xold[i][0];
buf[4] = xold[i][1];
buf[5] = xold[i][2];
buf[6] = imageold[i];
return 7;
}
/* ----------------------------------------------------------------------
unpack values in local atom-based array from exchange with another proc
------------------------------------------------------------------------- */
int FixEvent::unpack_exchange(int nlocal, double *buf)
{
xevent[nlocal][0] = buf[0];
xevent[nlocal][1] = buf[1];
xevent[nlocal][2] = buf[2];
xold[nlocal][0] = buf[3];
xold[nlocal][1] = buf[4];
xold[nlocal][2] = buf[5];
imageold[nlocal] = static_cast<int>(buf[6]);
return 7;
}
/* ----------------------------------------------------------------------
pack entire state of Fix into one write
------------------------------------------------------------------------- */
void FixEvent::write_restart(FILE *fp)
{
int n = 0;
double list[5];
list[n++] = event_number;
list[n++] = event_timestep;
list[n++] = clock;
list[n++] = replica_number;
list[n++] = correlated_event;
if (comm->me == 0) {
int size = n * sizeof(double);
fwrite(&size,sizeof(int),1,fp);
fwrite(&list,sizeof(double),n,fp);
}
}
/* ----------------------------------------------------------------------
use state info from restart file to restart the Fix
------------------------------------------------------------------------- */
void FixEvent::restart(char *buf)
{
int n = 0;
double *list = (double *) buf;
event_number = static_cast<int> (list[n++]);
event_timestep = static_cast<int> (list[n++]);
clock = static_cast<int> (list[n++]);
replica_number = static_cast<int> (list[n++]);
correlated_event = static_cast<int> (list[n++]);
}

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src/PRD/fix_event.h Normal file
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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 FIX_EVENT_H
#define FIX_EVENT_H
#include "fix.h"
namespace LAMMPS_NS {
class FixEvent : public Fix {
public:
int event_number; // event counter
int event_timestep; // timestep of last event on any replica
int clock; // total elapsed timesteps across all replicas
int replica_number; // replica where last event occured
int correlated_event; // 1 if last event was correlated, 0 otherwise
FixEvent(class LAMMPS *, int, char **);
~FixEvent();
int setmask();
double memory_usage();
void grow_arrays(int);
void copy_arrays(int, int);
int pack_exchange(int, double *);
int unpack_exchange(int, double *);
void write_restart(FILE *);
void restart(char *);
// methods specific to FixEvent, invoked by PRD
void store_event(int, int);
void store_state();
void restore_state();
private:
double **xevent; // atom coords at last event
double **xold; // atom coords for reset/restore
int *imageold; // image flags for reset/restore
};
}
#endif

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src/PRD/prd.cpp Normal file
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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.
------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
Contributing author: Mike Brown (SNL)
------------------------------------------------------------------------- */
#include "math.h"
#include "stdlib.h"
#include "string.h"
#include "prd.h"
#include "universe.h"
#include "update.h"
#include "atom.h"
#include "domain.h"
#include "comm.h"
#include "velocity.h"
#include "integrate.h"
#include "min.h"
#include "neighbor.h"
#include "modify.h"
#include "compute.h"
#include "fix.h"
#include "fix_event.h"
#include "force.h"
#include "pair.h"
#include "random_park.h"
#include "random_mars.h"
#include "output.h"
#include "dump.h"
#include "finish.h"
#include "timer.h"
#include "memory.h"
#include "error.h"
using namespace LAMMPS_NS;
#define MAXINT 0x7FFFFFFF
/* ---------------------------------------------------------------------- */
PRD::PRD(LAMMPS *lmp) : Pointers(lmp) {}
/* ----------------------------------------------------------------------
perform PRD
------------------------------------------------------------------------- */
void PRD::command(int narg, char **arg)
{
int i,flag,allflag,ireplica;
// error checks
if (domain->box_exist == 0)
error->all("PRD command before simulation box is defined");
if (universe->nworlds != universe->nprocs &&
atom->map_style == 0)
error->all("Cannot use PRD command with multi-proc replicas "
"unless atom map exists");
if (universe->nworlds == 1 && comm->me == 0)
error->warning("Running PRD with only one replica");
if (narg < 7) error->universe_all("Illegal prd command");
nsteps = atoi(arg[0]);
t_event = atoi(arg[1]);
n_dephase = atoi(arg[2]);
t_dephase = atoi(arg[3]);
t_corr = atoi(arg[4]);
char id_compute[strlen(arg[5])+1];
strcpy(id_compute,arg[5]);
int seed = atoi(arg[6]);
options(narg-7,&arg[7]);
// total # of timesteps must be multiple of t_event
if (t_event == 0) error->universe_all("Invalid t_event in prd command");
if (nsteps % t_event)
error->universe_all("PRD nsteps must be multiple of t_event");
if (t_corr % t_event)
error->universe_all("PRD t_corr must be multiple of t_event");
// local storage
int me_universe = universe->me;
int nprocs_universe = universe->nprocs;
int nreplica = universe->nworlds;
int iworld = universe->iworld;
MPI_Comm_rank(world,&me);
MPI_Comm_size(world,&nprocs);
// comm_replica = communicator between same proc across replicas
// not used if replicas have unequal number of procs
// equal_size_replicas = 1 if all replicas have same # of procs
int color = me;
MPI_Comm_split(universe->uworld,color,0,&comm_replica);
flag = 0;
if (nreplica*nprocs == nprocs_universe) flag = 1;
MPI_Allreduce(&flag,&equal_size_replicas,1,MPI_INT,MPI_MIN,universe->uworld);
// workspace for inter-replica communication via gathers
natoms = static_cast<int> (atom->natoms);
displacements = NULL;
tagall = NULL;
xall = NULL;
imageall = NULL;
if (nreplica != nprocs_universe) {
displacements = new int[nprocs];
tagall = (int *) memory->smalloc(natoms*sizeof(int),"prd:tagall");
xall = memory->create_2d_double_array(natoms,3,"prd:xall");
imageall = (int *) memory->smalloc(natoms*sizeof(int),"prd:imageall");
}
// random_select = same RNG for each replica for multiple event selection
// random_dephase = unique RNG for each replica for dephasing
random_select = new RanPark(lmp,seed);
random_dephase = new RanMars(lmp,seed+iworld);
// create ComputeTemp class to monitor temperature
char **args = new char*[3];
args[0] = (char *) "prd_temp";
args[1] = (char *) "all";
args[2] = (char *) "temp";
modify->add_compute(3,args);
temperature = modify->compute[modify->ncompute-1];
// create Velocity class for velocity creation in dephasing
// pass it temperature compute, loop_setting, dist_setting settings
atom->check_mass();
velocity = new Velocity(lmp);
velocity->init_external("all");
args[0] = (char *) "temp";
args[1] = (char *) "prd_temp";
velocity->options(2,args);
args[0] = (char *) "loop";
args[1] = (char *) loop_setting;
if (loop_setting) velocity->options(2,args);
args[0] = (char *) "dist";
args[1] = (char *) dist_setting;
if (dist_setting) velocity->options(2,args);
// create FixEvent class to store event and pre-quench states
args[0] = (char *) "prd_event";
args[1] = (char *) "all";
args[2] = (char *) "EVENT";
modify->add_fix(3,args);
fix_event = (FixEvent *) modify->fix[modify->nfix-1];
// create Finish for timing output
finish = new Finish(lmp);
// string clean-up
delete [] args;
delete [] loop_setting;
delete [] dist_setting;
// assign FixEvent to event-detection compute
// necessary so it will know atom coords at last event
int icompute = modify->find_compute(id_compute);
if (icompute < 0) error->all("Could not find compute ID for PRD");
compute_event = modify->compute[icompute];
compute_event->reset_extra_compute_fix("prd_event");
// reset reneighboring criteria since will perform minimizations
neigh_every = neighbor->every;
neigh_delay = neighbor->delay;
neigh_dist_check = neighbor->dist_check;
if (neigh_every != 1 || neigh_delay != 0 || neigh_dist_check != 1) {
if (me == 0)
error->warning("Resetting reneighboring criteria during PRD");
}
neighbor->every = 1;
neighbor->delay = 0;
neighbor->dist_check = 1;
// initialize PRD as if one long dynamics run
update->whichflag = 1;
update->nsteps = nsteps;
update->beginstep = update->firststep = update->ntimestep;
update->endstep = update->laststep = update->firststep + nsteps;
update->restrict_output = 1;
lmp->init();
// init minimizer settings and minimizer itself
update->etol = etol;
update->ftol = ftol;
update->max_eval = maxeval;
update->minimize->init();
// cannot use PRD with time-dependent fixes
for (int i = 0; i < modify->nfix; i++)
if (modify->fix[i]->time_depend)
error->all("Cannot use PRD with a time-dependent fix defined");
// perform PRD simulation
if (me_universe == 0 && universe->uscreen)
fprintf(universe->uscreen,"Setting up PRD ...\n");
if (me_universe == 0) {
if (universe->uscreen)
fprintf(universe->uscreen,"Step Clock Event Correlated Replica\n");
if (universe->ulogfile)
fprintf(universe->ulogfile,"Step Clock Event Correlated Replica\n");
}
// store hot state and quenched event for replica 0
// use share_event() to copy that info to all replicas
// this insures all start from same place
// need this line if quench() does only setup_minimal()
//update->minimize->setup();
fix_event->store_state();
quench();
share_event(0,0);
log_event();
// do full init/setup since are starting all replicas after event
// replica 0 bcasts temp to all replicas if user did not set temp_dephase
update->whichflag = 1;
lmp->init();
update->integrate->setup();
if (temp_flag == 0) {
if (universe->iworld == 0)
temp_dephase = temperature->compute_scalar();
MPI_Bcast(&temp_dephase,1,MPI_DOUBLE,universe->root_proc[0],
universe->uworld);
}
// main loop: look for events until out of time
// (1) dephase independently on each proc after event
// (2) loop: dynamics, store state, quench, check event, restore state
// (3) share and record event
nbuild = ndanger = 0;
time_dephase = time_dynamics = time_quench = time_comm = time_output = 0.0;
timer->barrier_start(TIME_LOOP);
double time_start = timer->array[TIME_LOOP];
while (update->ntimestep < update->endstep) {
dephase();
ireplica = -1;
while (update->ntimestep < update->endstep) {
dynamics();
fix_event->store_state();
quench();
ireplica = check_event();
if (ireplica >= 0) break;
fix_event->restore_state();
}
if (ireplica < 0) break;
// Can potentially be more efficient for correlated events by not
// sharing until correlated check has completed (this will complicate
// the dump (always on replica 0)).
share_event(ireplica,1);
log_event();
int restart_flag = 0;
if (output->restart_every && universe->iworld == 0)
if (fix_event->event_number % output->restart_every == 0)
restart_flag = 1;
// Correlated event loop
// -- We could have other procs doing dephasing during this time
int corr_endstep = update->ntimestep + t_corr;
while (update->ntimestep < corr_endstep) {
if (update->ntimestep == update->endstep) {
restart_flag = 0;
break;
}
dynamics();
fix_event->store_state();
quench();
int corr_event_check = check_event(ireplica);
if (corr_event_check >= 0) {
share_event(ireplica,2);
log_event();
corr_endstep = update->ntimestep + t_corr;
} else
fix_event->restore_state();
}
// do full init/setup since are starting all replicas after event
// -- also, need to get reneighbor before restart
update->whichflag = 1;
lmp->init();
update->integrate->setup();
timer->barrier_start(TIME_LOOP);
if (t_corr > 0) replicate(ireplica);
// event replica bcasts temp to all replicas if user did not set temp_dephase
if (temp_flag == 0) {
if (ireplica == universe->iworld)
temp_dephase = temperature->compute_scalar();
MPI_Bcast(&temp_dephase,1,MPI_DOUBLE,universe->root_proc[ireplica],
universe->uworld);
}
timer->barrier_stop(TIME_LOOP);
time_comm += timer->array[TIME_LOOP];
// write restart file of hot coords
if (restart_flag) {
timer->barrier_start(TIME_LOOP);
output->write_restart(update->ntimestep);
timer->barrier_stop(TIME_LOOP);
time_output += timer->array[TIME_LOOP];
}
}
// set total timers and counters so Finish() will process them
timer->array[TIME_LOOP] = time_start;
timer->barrier_stop(TIME_LOOP);
timer->array[TIME_PAIR] = time_dephase;
timer->array[TIME_BOND] = time_dynamics;
timer->array[TIME_KSPACE] = time_quench;
timer->array[TIME_COMM] = time_comm;
timer->array[TIME_OUTPUT] = time_output;
neighbor->ncalls = nbuild;
neighbor->ndanger = ndanger;
if (me_universe == 0) {
if (universe->uscreen)
fprintf(universe->uscreen,
"Loop time of %g on %d procs for %d steps with %.15g atoms\n",
timer->array[TIME_LOOP],nprocs_universe,nsteps,atom->natoms);
if (universe->ulogfile)
fprintf(universe->ulogfile,
"Loop time of %g on %d procs for %d steps with %.15g atoms\n",
timer->array[TIME_LOOP],nprocs_universe,nsteps,atom->natoms);
}
finish->end(2);
update->whichflag = 0;
update->firststep = update->laststep = 0;
update->beginstep = update->endstep = 0;
update->restrict_output = 0;
// reset reneighboring criteria
neighbor->every = neigh_every;
neighbor->delay = neigh_delay;
neighbor->dist_check = neigh_dist_check;
// clean up
delete [] displacements;
memory->sfree(tagall);
memory->destroy_2d_double_array(xall);
memory->sfree(imageall);
MPI_Comm_free(&comm_replica);
delete random_select;
delete random_dephase;
delete velocity;
delete finish;
modify->delete_compute("prd_temp");
modify->delete_fix("prd_event");
}
/* ----------------------------------------------------------------------
dephasing = one or more short runs with new random velocities
------------------------------------------------------------------------- */
void PRD::dephase()
{
int ntimestep_hold = update->ntimestep;
update->whichflag = 1;
update->nsteps = n_dephase*t_dephase;
timer->barrier_start(TIME_LOOP);
for (int i = 0; i < n_dephase; i++) {
int seed = static_cast<int> (random_dephase->uniform() * MAXINT);
if (seed == 0) seed = 1;
velocity->create(temp_dephase,seed);
update->integrate->run(t_dephase);
if (temp_flag == 0) temp_dephase = temperature->compute_scalar();
}
timer->barrier_stop(TIME_LOOP);
time_dephase += timer->array[TIME_LOOP];
update->integrate->cleanup();
finish->end(0);
// reset timestep as if dephase did not occur
// clear timestep storage from computes, since now invalid
update->ntimestep = ntimestep_hold;
for (int i = 0; i < modify->ncompute; i++)
if (modify->compute[i]->timeflag) modify->compute[i]->clearstep();
}
/* ----------------------------------------------------------------------
single short dynamics run
------------------------------------------------------------------------- */
void PRD::dynamics()
{
update->whichflag = 1;
update->nsteps = t_event;
lmp->init();
update->integrate->setup();
//modify->addstep_compute_all(update->ntimestep);
int ncalls = neighbor->ncalls;
timer->barrier_start(TIME_LOOP);
update->integrate->run(t_event);
timer->barrier_stop(TIME_LOOP);
time_dynamics += timer->array[TIME_LOOP];
nbuild += neighbor->ncalls - ncalls;
ndanger += neighbor->ndanger;
update->integrate->cleanup();
finish->end(0);
}
/* ----------------------------------------------------------------------
quench minimization
------------------------------------------------------------------------- */
void PRD::quench()
{
int ntimestep_hold = update->ntimestep;
// need to change whichflag so that minimize->setup() calling
// modify->setup() will call fix->min_setup()
update->whichflag = 2;
update->nsteps = maxiter;
// these work
lmp->init();
update->minimize->setup();
// these do not work
//modify->addstep_compute_all(update->ntimestep);
//update->minimize->setup_minimal(1);
int ncalls = neighbor->ncalls;
timer->barrier_start(TIME_LOOP);
update->minimize->run(maxiter);
timer->barrier_stop(TIME_LOOP);
time_quench += timer->array[TIME_LOOP];
if (neighbor->ncalls == ncalls) quench_reneighbor = 0;
else quench_reneighbor = 1;
update->minimize->cleanup();
finish->end(0);
// reset timestep as if dephase did not occur
// clear timestep storage from computes, since now invalid
update->ntimestep = ntimestep_hold;
for (int i = 0; i < modify->ncompute; i++)
if (modify->compute[i]->timeflag) modify->compute[i]->clearstep();
}
/* ----------------------------------------------------------------------
check for an event in any replica
if replica_num is non-negative only check for event on replica_num
if multiple events, choose one at random
return -1 if no event
else return ireplica = world in which event occured
------------------------------------------------------------------------- */
int PRD::check_event(int replica_num)
{
int worldflag,universeflag,scanflag,replicaflag,ireplica;
worldflag = 0;
if (compute_event->compute_scalar() > 0.0) worldflag = 1;
if (replica_num >= 0 && replica_num != universe->iworld) worldflag = 0;
timer->barrier_start(TIME_LOOP);
if (me == 0) MPI_Allreduce(&worldflag,&universeflag,1,
MPI_INT,MPI_SUM,comm_replica);
MPI_Bcast(&universeflag,1,MPI_INT,0,world);
if (!universeflag)
ireplica = -1;
else {
if (universeflag > 1) {
int iwhich = static_cast<int> (universeflag*random_select->uniform()) + 1;
if (me == 0) MPI_Scan(&worldflag,&scanflag,1,
MPI_INT,MPI_SUM,comm_replica);
MPI_Bcast(&scanflag,1,MPI_INT,0,world);
if (scanflag != iwhich) worldflag = 0;
}
if (worldflag) replicaflag = universe->iworld;
else replicaflag = 0;
if (me == 0) MPI_Allreduce(&replicaflag,&ireplica,1,
MPI_INT,MPI_SUM,comm_replica);
MPI_Bcast(&ireplica,1,MPI_INT,0,world);
}
timer->barrier_stop(TIME_LOOP);
time_comm += timer->array[TIME_LOOP];
return ireplica;
}
/* ----------------------------------------------------------------------
share quenched and hot coords owned by ireplica with all replicas
all replicas store event in fix_event
replica 0 dumps event snapshot
flag = 0 = called before PRD run
flag = 1 = called during PRD run = not correlated event
flag = 2 = called during PRD run = correlated event
------------------------------------------------------------------------- */
void PRD::share_event(int ireplica, int flag)
{
timer->barrier_start(TIME_LOOP);
// communicate quenched coords to all replicas and store as event
// decrement event counter if flag = 0 since not really an event
replicate(ireplica);
timer->barrier_stop(TIME_LOOP);
time_comm += timer->array[TIME_LOOP];
// Adjust time for last correlated event check (Not on first event)
int corr_adjust = t_corr;
if (fix_event->event_number<1 || flag == 2) corr_adjust = 0;
// Time since last correlated event check
int delta = update->ntimestep - fix_event->event_timestep - corr_adjust;
// If this is a correlated event, time was only on one partition
if (flag != 2) delta *= universe->nworlds;
delta += corr_adjust;
// Don't change the clock or timestep if this is a restart
if (flag == 0 && fix_event->event_number != 0)
fix_event->store_event(fix_event->event_timestep,0);
else {
fix_event->store_event(update->ntimestep,delta);
fix_event->replica_number = ireplica;
fix_event->correlated_event = 0;
if (flag == 2) fix_event->correlated_event = 1;
}
if (flag == 0) fix_event->event_number--;
// dump snapshot of quenched coords
// must reneighbor and compute forces before dumping
// since replica 0 possibly has new state from another replica
// addstep_compute_all insures eng/virial are calculated if needed
if (output->ndump && universe->iworld == 0) {
timer->barrier_start(TIME_LOOP);
modify->addstep_compute_all(update->ntimestep);
update->integrate->setup_minimal(1);
output->write_dump(update->ntimestep);
timer->barrier_stop(TIME_LOOP);
time_output += timer->array[TIME_LOOP];
}
// restore and communicate hot coords to all replicas
fix_event->restore_state();
timer->barrier_start(TIME_LOOP);
replicate(ireplica);
timer->barrier_stop(TIME_LOOP);
time_comm += timer->array[TIME_LOOP];
}
/* ----------------------------------------------------------------------
universe proc 0 prints event info
------------------------------------------------------------------------- */
void PRD::log_event()
{
if (universe->me == 0) {
if (universe->uscreen)
fprintf(universe->uscreen,"%d %d %d %d %d\n",
fix_event->event_timestep,fix_event->clock,
fix_event->event_number,fix_event->correlated_event,
fix_event->replica_number);
if (universe->ulogfile)
fprintf(universe->ulogfile,"%d %d %d %d %d\n",
fix_event->event_timestep,fix_event->clock,
fix_event->event_number,fix_event->correlated_event,
fix_event->replica_number);
}
}
/* ----------------------------------------------------------------------
communicate atom coords and image flags in ireplica to all other replicas
one proc per replica:
direct overwrite via bcast
equal procs per replica and no replica reneighbored:
direct overwrite via bcast
unequal procs per replica or reneighboring occurred:
collect to root proc of event replica
bcast to roots of other replicas
bcast within each replica
each proc extracts info for atoms it owns using atom IDs
------------------------------------------------------------------------- */
void PRD::replicate(int ireplica)
{
int nreplica = universe->nworlds;
int nprocs_universe = universe->nprocs;
int i,m,flag,commflag;
int counts[nprocs];
if (nreplica == nprocs_universe) commflag = 0;
else if (equal_size_replicas) {
flag = 0;
if (quench_reneighbor) flag = 1;
MPI_Allreduce(&flag,&commflag,1,MPI_INT,MPI_MAX,universe->uworld);
} else commflag = 1;
if (commflag == 0) {
MPI_Bcast(atom->image,atom->nlocal,MPI_INT,ireplica,comm_replica);
MPI_Bcast(atom->x[0],3*atom->nlocal,MPI_DOUBLE,ireplica,comm_replica);
} else {
if (universe->iworld == ireplica) {
MPI_Gather(&atom->nlocal,1,MPI_INT,counts,1,MPI_INT,0,world);
displacements[0] = 0;
for (i = 0; i < nprocs-1; i++)
displacements[i+1] = displacements[i] + counts[i];
MPI_Gatherv(atom->tag,atom->nlocal,MPI_INT,
tagall,counts,displacements,MPI_INT,0,world);
MPI_Gatherv(atom->image,atom->nlocal,MPI_INT,
imageall,counts,displacements,MPI_INT,0,world);
for (i = 0; i < nprocs; i++) counts[i] *= 3;
for (i = 0; i < nprocs-1; i++)
displacements[i+1] = displacements[i] + counts[i];
MPI_Gatherv(atom->x[0],3*atom->nlocal,MPI_DOUBLE,
xall[0],counts,displacements,MPI_DOUBLE,0,world);
}
if (me == 0) {
MPI_Bcast(tagall,natoms,MPI_INT,ireplica,comm_replica);
MPI_Bcast(imageall,natoms,MPI_INT,ireplica,comm_replica);
MPI_Bcast(xall[0],3*natoms,MPI_DOUBLE,ireplica,comm_replica);
}
MPI_Bcast(tagall,natoms,MPI_INT,0,world);
MPI_Bcast(imageall,natoms,MPI_INT,0,world);
MPI_Bcast(xall[0],3*natoms,MPI_DOUBLE,0,world);
double **x = atom->x;
int nlocal = atom->nlocal;
for (i = 0; i < natoms; i++) {
m = atom->map(tagall[i]);
if (m >= 0 && m < nlocal) {
x[m][0] = xall[i][0];
x[m][1] = xall[i][1];
x[m][2] = xall[i][2];
atom->image[m] = imageall[i];
}
}
}
}
/* ----------------------------------------------------------------------
parse optional parameters at end of PRD input line
------------------------------------------------------------------------- */
void PRD::options(int narg, char **arg)
{
if (narg < 0) error->all("Illegal prd command");
// set defaults
etol = 0.1;
ftol = 0.1;
maxiter = 40;
maxeval = 50;
temp_flag = 0;
loop_setting = NULL;
dist_setting = NULL;
int iarg = 0;
while (iarg < narg) {
if (strcmp(arg[iarg],"min") == 0) {
if (iarg+5 > narg) error->all("Illegal prd command");
etol = atof(arg[iarg+1]);
ftol = atof(arg[iarg+2]);
maxiter = atoi(arg[iarg+3]);
maxeval = atoi(arg[iarg+4]);
if (maxiter < 0) error->all("Illegal prd command");
iarg += 5;
} else if (strcmp(arg[iarg],"temp") == 0) {
if (iarg+2 > narg) error->all("Illegal prd command");
temp_flag = 1;
temp_dephase = atof(arg[iarg+1]);
if (temp_dephase <= 0.0) error->all("Illegal prd command");
iarg += 2;
} else if (strcmp(arg[iarg],"vel") == 0) {
if (iarg+3 > narg) error->all("Illegal prd command");
if (strcmp(arg[iarg+1],"all") == 0) loop_setting = NULL;
else if (strcmp(arg[iarg+1],"local") == 0) loop_setting = NULL;
else if (strcmp(arg[iarg+1],"geom") == 0) loop_setting = NULL;
else error->all("Illegal prd command");
int n = strlen(arg[iarg+1]) + 1;
loop_setting = new char[n];
strcpy(loop_setting,arg[iarg+1]);
if (strcmp(arg[iarg+2],"uniform") == 0) dist_setting = NULL;
else if (strcmp(arg[iarg+2],"gaussian") == 0) dist_setting = NULL;
else error->all("Illegal prd command");
n = strlen(arg[iarg+2]) + 1;
dist_setting = new char[n];
strcpy(dist_setting,arg[iarg+2]);
iarg += 3;
} else error->all("Illegal prd command");
}
// Set defaults
if (loop_setting == NULL) {
loop_setting = new char[5];
strcpy(loop_setting,"geom");
}
if (dist_setting == NULL) {
dist_setting = new char[9];
strcpy(dist_setting,"gaussian");
}
}

65
src/PRD/prd.h Normal file
View File

@ -0,0 +1,65 @@
/* ----------------------------------------------------------------------
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 PRD_H
#define PRD_H
#include "pointers.h"
namespace LAMMPS_NS {
class PRD : protected Pointers {
public:
PRD(class LAMMPS *);
~PRD() {}
void command(int, char **);
private:
int me,nprocs;
int nsteps,t_event,n_dephase,t_dephase,t_corr;
double etol,ftol,temp_dephase;
int maxiter,maxeval,temp_flag;
char *loop_setting,*dist_setting;
int equal_size_replicas,natoms;
int neigh_every,neigh_delay,neigh_dist_check;
int nbuild,ndanger;
int quench_reneighbor;
double time_dephase,time_dynamics,time_quench,time_comm,time_output;
MPI_Comm comm_replica;
int *tagall,*displacements,*imageall;
double **xall;
class RanPark *random_select;
class RanMars *random_dephase;
class Compute *compute_event;
class FixEvent *fix_event;
class Velocity *velocity;
class Compute *temperature;
class Finish *finish;
void dephase();
void dynamics();
void quench();
int check_event(int replica = -1);
void share_event(int, int);
void log_event();
void replicate(int);
void options(int, char **);
};
}
#endif

36
src/PRD/style_prd.h Normal file
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@ -0,0 +1,36 @@
/* ----------------------------------------------------------------------
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.
------------------------------------------------------------------------- */
#ifdef CommandInclude
#include "prd.h"
#endif
#ifdef CommandClass
CommandStyle(prd,PRD)
#endif
#ifdef ComputeInclude
#include "compute_event_displace.h"
#endif
#ifdef ComputeClass
ComputeStyle(event/displace,ComputeEventDisplace)
#endif
#ifdef FixInclude
#include "fix_event.h"
#endif
#ifdef FixClass
FixStyle(EVENT,FixEvent)
#endif

View File

@ -385,6 +385,7 @@ RegionStyle(union,RegUnion)
#include "style_opt.h"
#include "style_peri.h"
#include "style_poems.h"
#include "style_prd.h"
#include "style_reax.h"
#include "style_xtc.h"

View File

@ -1,20 +0,0 @@
/* ----------------------------------------------------------------------
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.
------------------------------------------------------------------------- */
#ifdef ComputeInclude
#include "compute_ackland_atom.h"
#endif
#ifdef ComputeClass
ComputeStyle(ackland/atom,ComputeAcklandAtom)
#endif

View File

@ -1,30 +0,0 @@
/* ----------------------------------------------------------------------
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.
------------------------------------------------------------------------- */
#ifdef KSpaceInclude
#include "ewald_n.h"
#endif
#ifdef KSpaceClass
KSpaceStyle(ewald/n,EwaldN)
#endif
#ifdef PairInclude
#include "pair_buck_coul.h"
#include "pair_lj_coul.h"
#endif
#ifdef PairClass
PairStyle(buck/coul,PairBuckCoul)
PairStyle(lj/coul,PairLJCoul)
#endif