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/*
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* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
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*
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* The University of Notre Dame grants you ("Licensee") a
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* non-exclusive, royalty free, license to use, modify and
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* redistribute this software in source and binary code form, provided
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* that the following conditions are met:
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*
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* 1. Acknowledgement of the program authors must be made in any
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* publication of scientific results based in part on use of the
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* program. An acceptable form of acknowledgement is citation of
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* the article in which the program was described (Matthew
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* A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher
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* J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented
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* Parallel Simulation Engine for Molecular Dynamics,"
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* J. Comput. Chem. 26, pp. 252-271 (2005))
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*
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* 2. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 3. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* This software is provided "AS IS," without a warranty of any
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* kind. All express or implied conditions, representations and
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* warranties, including any implied warranty of merchantability,
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* fitness for a particular purpose or non-infringement, are hereby
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* excluded. The University of Notre Dame and its licensors shall not
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* be liable for any damages suffered by licensee as a result of
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* using, modifying or distributing the software or its
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* derivatives. In no event will the University of Notre Dame or its
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* licensors be liable for any lost revenue, profit or data, or for
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* direct, indirect, special, consequential, incidental or punitive
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* damages, however caused and regardless of the theory of liability,
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* arising out of the use of or inability to use software, even if the
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* University of Notre Dame has been advised of the possibility of
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* such damages.
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*/
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/**
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* @file SimCreator.cpp
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* @author tlin
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* @date 11/03/2004
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* @time 13:51am
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* @version 1.0
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*/
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#include "brains/MoleculeCreator.hpp"
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#include "brains/SimCreator.hpp"
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#include "brains/SimSnapshotManager.hpp"
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#include "io/DumpReader.hpp"
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#include "io/parse_me.h"
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#include "UseTheForce/ForceFieldFactory.hpp"
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#include "utils/simError.h"
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#include "utils/StringUtils.hpp"
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#include "math/SeqRandNumGen.hpp"
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#ifdef IS_MPI
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#include "io/mpiBASS.h"
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#include "math/ParallelRandNumGen.hpp"
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#endif
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namespace oopse {
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void SimCreator::parseFile(const std::string mdFileName, MakeStamps* stamps, Globals* simParams){
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#ifdef IS_MPI
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if (worldRank == 0) {
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#endif // is_mpi
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simParams->initalize();
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set_interface_stamps(stamps, simParams);
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#ifdef IS_MPI
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mpiEventInit();
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#endif
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yacc_BASS(mdFileName.c_str());
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#ifdef IS_MPI
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throwMPIEvent(NULL);
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} else {
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set_interface_stamps(stamps, simParams);
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mpiEventInit();
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MPIcheckPoint();
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mpiEventLoop();
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}
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#endif
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}
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SimInfo* SimCreator::createSim(const std::string & mdFileName, bool loadInitCoords) {
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MakeStamps * stamps = new MakeStamps();
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Globals * simParams = new Globals();
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//parse meta-data file
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parseFile(mdFileName, stamps, simParams);
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//create the force field
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ForceField * ff = ForceFieldFactory::getInstance()->createForceField(
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simParams->getForceField());
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if (ff == NULL) {
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sprintf(painCave.errMsg, "ForceField Factory can not create %s force field\n",
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simParams->getForceField());
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painCave.isFatal = 1;
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simError();
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}
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if (simParams->haveForceFieldFileName()) {
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ff->setForceFieldFileName(simParams->getForceFieldFileName());
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}
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std::string forcefieldFileName;
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forcefieldFileName = ff->getForceFieldFileName();
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if (simParams->haveForceFieldVariant()) {
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//If the force field has variant, the variant force field name will be
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//Base.variant.frc. For exampel EAM.u6.frc
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std::string variant = simParams->getForceFieldVariant();
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std::string::size_type pos = forcefieldFileName.rfind(".frc");
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variant = "." + variant;
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if (pos != std::string::npos) {
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forcefieldFileName.insert(pos, variant);
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} else {
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//If the default force field file name does not containt .frc suffix, just append the .variant
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forcefieldFileName.append(variant);
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}
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}
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ff->parse(forcefieldFileName);
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//extract the molecule stamps
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std::vector < std::pair<MoleculeStamp *, int> > moleculeStampPairs;
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compList(stamps, simParams, moleculeStampPairs);
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//create SimInfo
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SimInfo * info = new SimInfo(moleculeStampPairs, ff, simParams);
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//gather parameters (SimCreator only retrieves part of the parameters)
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gatherParameters(info, mdFileName);
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//divide the molecules and determine the global index of molecules
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#ifdef IS_MPI
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divideMolecules(info);
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#endif
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//create the molecules
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createMolecules(info);
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//allocate memory for DataStorage(circular reference, need to break it)
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info->setSnapshotManager(new SimSnapshotManager(info));
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//set the global index of atoms, rigidbodies and cutoffgroups (only need to be set once, the
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//global index will never change again). Local indices of atoms and rigidbodies are already set by
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//MoleculeCreator class which actually delegates the responsibility to LocalIndexManager.
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setGlobalIndex(info);
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//Alought addExculdePairs is called inside SimInfo's addMolecule method, at that point
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//atoms don't have the global index yet (their global index are all initialized to -1).
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//Therefore we have to call addExcludePairs explicitly here. A way to work around is that
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//we can determine the beginning global indices of atoms before they get created.
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SimInfo::MoleculeIterator mi;
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Molecule* mol;
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for (mol= info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {
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info->addExcludePairs(mol);
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}
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//load initial coordinates, some extra information are pushed into SimInfo's property map ( such as
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//eta, chi for NPT integrator)
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if (loadInitCoords)
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loadCoordinates(info);
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return info;
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}
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void SimCreator::gatherParameters(SimInfo *info, const std::string& mdfile) {
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//figure out the ouput file names
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std::string prefix;
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#ifdef IS_MPI
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if (worldRank == 0) {
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#endif // is_mpi
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Globals * simParams = info->getSimParams();
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if (simParams->haveFinalConfig()) {
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prefix = getPrefix(simParams->getFinalConfig());
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} else {
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prefix = getPrefix(mdfile);
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}
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info->setFinalConfigFileName(prefix + ".eor");
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info->setDumpFileName(prefix + ".dump");
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info->setStatFileName(prefix + ".stat");
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#ifdef IS_MPI
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}
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#endif
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}
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#ifdef IS_MPI
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void SimCreator::divideMolecules(SimInfo *info) {
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double numerator;
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double denominator;
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double precast;
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double x;
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double y;
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double a;
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int old_atoms;
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int add_atoms;
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int new_atoms;
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int nTarget;
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int done;
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int i;
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int j;
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int loops;
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int which_proc;
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int nProcessors;
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std::vector<int> atomsPerProc;
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int nGlobalMols = info->getNGlobalMolecules();
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std::vector<int> molToProcMap(nGlobalMols, -1); // default to an error condition:
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MPI_Comm_size(MPI_COMM_WORLD, &nProcessors);
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if (nProcessors > nGlobalMols) {
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sprintf(painCave.errMsg,
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"nProcessors (%d) > nMol (%d)\n"
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"\tThe number of processors is larger than\n"
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"\tthe number of molecules. This will not result in a \n"
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"\tusable division of atoms for force decomposition.\n"
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"\tEither try a smaller number of processors, or run the\n"
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"\tsingle-processor version of OOPSE.\n", nProcessors, nGlobalMols);
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painCave.isFatal = 1;
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simError();
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}
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int seedValue;
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Globals * simParams = info->getSimParams();
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SeqRandNumGen* myRandom; //divide labor does not need Parallel random number generator
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if (simParams->haveSeed()) {
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seedValue = simParams->getSeed();
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myRandom = new SeqRandNumGen(seedValue);
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}else {
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myRandom = new SeqRandNumGen();
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}
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a = 3.0 * nGlobalMols / info->getNGlobalAtoms();
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//initialize atomsPerProc
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atomsPerProc.insert(atomsPerProc.end(), nProcessors, 0);
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if (worldRank == 0) {
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numerator = info->getNGlobalAtoms();
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denominator = nProcessors;
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precast = numerator / denominator;
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nTarget = (int)(precast + 0.5);
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for(i = 0; i < nGlobalMols; i++) {
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done = 0;
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loops = 0;
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while (!done) {
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loops++;
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// Pick a processor at random
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which_proc = (int) (myRandom->rand() * nProcessors);
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//get the molecule stamp first
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int stampId = info->getMoleculeStampId(i);
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MoleculeStamp * moleculeStamp = info->getMoleculeStamp(stampId);
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// How many atoms does this processor have so far?
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old_atoms = atomsPerProc[which_proc];
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add_atoms = moleculeStamp->getNAtoms();
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new_atoms = old_atoms + add_atoms;
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// If we've been through this loop too many times, we need
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// to just give up and assign the molecule to this processor
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// and be done with it.
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if (loops > 100) {
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sprintf(painCave.errMsg,
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"I've tried 100 times to assign molecule %d to a "
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" processor, but can't find a good spot.\n"
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"I'm assigning it at random to processor %d.\n",
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i, which_proc);
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painCave.isFatal = 0;
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simError();
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molToProcMap[i] = which_proc;
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atomsPerProc[which_proc] += add_atoms;
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done = 1;
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continue;
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}
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// If we can add this molecule to this processor without sending
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// it above nTarget, then go ahead and do it:
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if (new_atoms <= nTarget) {
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molToProcMap[i] = which_proc;
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atomsPerProc[which_proc] += add_atoms;
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done = 1;
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continue;
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}
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// The only situation left is when new_atoms > nTarget. We
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// want to accept this with some probability that dies off the
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// farther we are from nTarget
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// roughly: x = new_atoms - nTarget
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// Pacc(x) = exp(- a * x)
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// where a = penalty / (average atoms per molecule)
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x = (double)(new_atoms - nTarget);
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y = myRandom->rand();
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if (y < exp(- a * x)) {
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molToProcMap[i] = which_proc;
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atomsPerProc[which_proc] += add_atoms;
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done = 1;
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continue;
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} else {
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continue;
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}
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}
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}
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delete myRandom;
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// Spray out this nonsense to all other processors:
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MPI_Bcast(&molToProcMap[0], nGlobalMols, MPI_INT, 0, MPI_COMM_WORLD);
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} else {
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// Listen to your marching orders from processor 0:
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MPI_Bcast(&molToProcMap[0], nGlobalMols, MPI_INT, 0, MPI_COMM_WORLD);
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}
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info->setMolToProcMap(molToProcMap);
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sprintf(checkPointMsg,
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"Successfully divided the molecules among the processors.\n");
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MPIcheckPoint();
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}
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#endif
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void SimCreator::createMolecules(SimInfo *info) {
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MoleculeCreator molCreator;
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int stampId;
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for(int i = 0; i < info->getNGlobalMolecules(); i++) {
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#ifdef IS_MPI
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if (info->getMolToProc(i) == worldRank) {
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#endif
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stampId = info->getMoleculeStampId(i);
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Molecule * mol = molCreator.createMolecule(info->getForceField(), info->getMoleculeStamp(stampId),
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stampId, i, info->getLocalIndexManager());
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info->addMolecule(mol);
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#ifdef IS_MPI
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}
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#endif
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} //end for(int i=0)
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}
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396 |
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void SimCreator::compList(MakeStamps *stamps, Globals* simParams,
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std::vector < std::pair<MoleculeStamp *, int> > &moleculeStampPairs) {
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int i;
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char * id;
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MoleculeStamp * currentStamp;
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Component** the_components = simParams->getComponents();
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int n_components = simParams->getNComponents();
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404 |
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if (!simParams->haveNMol()) {
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// we don't have the total number of molecules, so we assume it is
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// given in each component
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408 |
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for(i = 0; i < n_components; i++) {
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if (!the_components[i]->haveNMol()) {
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// we have a problem
|
412 |
sprintf(painCave.errMsg,
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413 |
"SimCreator Error. No global NMol or component NMol given.\n"
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414 |
"\tCannot calculate the number of atoms.\n");
|
415 |
|
416 |
painCave.isFatal = 1;
|
417 |
simError();
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418 |
}
|
419 |
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420 |
id = the_components[i]->getType();
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421 |
currentStamp = (stamps->extractMolStamp(id))->getStamp();
|
422 |
|
423 |
if (currentStamp == NULL) {
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sprintf(painCave.errMsg,
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425 |
"SimCreator error: Component \"%s\" was not found in the "
|
426 |
"list of declared molecules\n", id);
|
427 |
|
428 |
painCave.isFatal = 1;
|
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simError();
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430 |
}
|
431 |
|
432 |
moleculeStampPairs.push_back(
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std::make_pair(currentStamp, the_components[i]->getNMol()));
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} //end for (i = 0; i < n_components; i++)
|
435 |
} else {
|
436 |
sprintf(painCave.errMsg, "SimSetup error.\n"
|
437 |
"\tSorry, the ability to specify total"
|
438 |
" nMols and then give molfractions in the components\n"
|
439 |
"\tis not currently supported."
|
440 |
" Please give nMol in the components.\n");
|
441 |
|
442 |
painCave.isFatal = 1;
|
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simError();
|
444 |
}
|
445 |
|
446 |
#ifdef IS_MPI
|
447 |
|
448 |
strcpy(checkPointMsg, "Component stamps successfully extracted\n");
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449 |
MPIcheckPoint();
|
450 |
|
451 |
#endif // is_mpi
|
452 |
|
453 |
}
|
454 |
|
455 |
void SimCreator::setGlobalIndex(SimInfo *info) {
|
456 |
SimInfo::MoleculeIterator mi;
|
457 |
Molecule::AtomIterator ai;
|
458 |
Molecule::RigidBodyIterator ri;
|
459 |
Molecule::CutoffGroupIterator ci;
|
460 |
Molecule * mol;
|
461 |
Atom * atom;
|
462 |
RigidBody * rb;
|
463 |
CutoffGroup * cg;
|
464 |
int beginAtomIndex;
|
465 |
int beginRigidBodyIndex;
|
466 |
int beginCutoffGroupIndex;
|
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int nGlobalAtoms = info->getNGlobalAtoms();
|
468 |
|
469 |
#ifndef IS_MPI
|
470 |
|
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beginAtomIndex = 0;
|
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beginRigidBodyIndex = 0;
|
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beginCutoffGroupIndex = 0;
|
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|
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#else
|
476 |
|
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int nproc;
|
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int myNode;
|
479 |
|
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myNode = worldRank;
|
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MPI_Comm_size(MPI_COMM_WORLD, &nproc);
|
482 |
|
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std::vector < int > tmpAtomsInProc(nproc, 0);
|
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std::vector < int > tmpRigidBodiesInProc(nproc, 0);
|
485 |
std::vector < int > tmpCutoffGroupsInProc(nproc, 0);
|
486 |
std::vector < int > NumAtomsInProc(nproc, 0);
|
487 |
std::vector < int > NumRigidBodiesInProc(nproc, 0);
|
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std::vector < int > NumCutoffGroupsInProc(nproc, 0);
|
489 |
|
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tmpAtomsInProc[myNode] = info->getNAtoms();
|
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tmpRigidBodiesInProc[myNode] = info->getNRigidBodies();
|
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tmpCutoffGroupsInProc[myNode] = info->getNCutoffGroups();
|
493 |
|
494 |
//do MPI_ALLREDUCE to exchange the total number of atoms, rigidbodies and cutoff groups
|
495 |
MPI_Allreduce(&tmpAtomsInProc[0], &NumAtomsInProc[0], nproc, MPI_INT,
|
496 |
MPI_SUM, MPI_COMM_WORLD);
|
497 |
MPI_Allreduce(&tmpRigidBodiesInProc[0], &NumRigidBodiesInProc[0], nproc,
|
498 |
MPI_INT, MPI_SUM, MPI_COMM_WORLD);
|
499 |
MPI_Allreduce(&tmpCutoffGroupsInProc[0], &NumCutoffGroupsInProc[0], nproc,
|
500 |
MPI_INT, MPI_SUM, MPI_COMM_WORLD);
|
501 |
|
502 |
beginAtomIndex = 0;
|
503 |
beginRigidBodyIndex = 0;
|
504 |
beginCutoffGroupIndex = 0;
|
505 |
|
506 |
for(int i = 0; i < myNode; i++) {
|
507 |
beginAtomIndex += NumAtomsInProc[i];
|
508 |
beginRigidBodyIndex += NumRigidBodiesInProc[i];
|
509 |
beginCutoffGroupIndex += NumCutoffGroupsInProc[i];
|
510 |
}
|
511 |
|
512 |
#endif
|
513 |
|
514 |
//rigidbody's index begins right after atom's
|
515 |
beginRigidBodyIndex += info->getNGlobalAtoms();
|
516 |
|
517 |
for(mol = info->beginMolecule(mi); mol != NULL;
|
518 |
mol = info->nextMolecule(mi)) {
|
519 |
|
520 |
//local index(index in DataStorge) of atom is important
|
521 |
for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
|
522 |
atom->setGlobalIndex(beginAtomIndex++);
|
523 |
}
|
524 |
|
525 |
for(rb = mol->beginRigidBody(ri); rb != NULL;
|
526 |
rb = mol->nextRigidBody(ri)) {
|
527 |
rb->setGlobalIndex(beginRigidBodyIndex++);
|
528 |
}
|
529 |
|
530 |
//local index of cutoff group is trivial, it only depends on the order of travesing
|
531 |
for(cg = mol->beginCutoffGroup(ci); cg != NULL;
|
532 |
cg = mol->nextCutoffGroup(ci)) {
|
533 |
cg->setGlobalIndex(beginCutoffGroupIndex++);
|
534 |
}
|
535 |
}
|
536 |
|
537 |
//fill globalGroupMembership
|
538 |
std::vector<int> globalGroupMembership(info->getNGlobalAtoms(), 0);
|
539 |
for(mol = info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {
|
540 |
for (cg = mol->beginCutoffGroup(ci); cg != NULL; cg = mol->nextCutoffGroup(ci)) {
|
541 |
|
542 |
for(atom = cg->beginAtom(ai); atom != NULL; atom = cg->nextAtom(ai)) {
|
543 |
globalGroupMembership[atom->getGlobalIndex()] = cg->getGlobalIndex();
|
544 |
}
|
545 |
|
546 |
}
|
547 |
}
|
548 |
|
549 |
#ifdef IS_MPI
|
550 |
// Since the globalGroupMembership has been zero filled and we've only
|
551 |
// poked values into the atoms we know, we can do an Allreduce
|
552 |
// to get the full globalGroupMembership array (We think).
|
553 |
// This would be prettier if we could use MPI_IN_PLACE like the MPI-2
|
554 |
// docs said we could.
|
555 |
std::vector<int> tmpGroupMembership(nGlobalAtoms, 0);
|
556 |
MPI_Allreduce(&globalGroupMembership[0], &tmpGroupMembership[0], nGlobalAtoms,
|
557 |
MPI_INT, MPI_SUM, MPI_COMM_WORLD);
|
558 |
info->setGlobalGroupMembership(tmpGroupMembership);
|
559 |
#else
|
560 |
info->setGlobalGroupMembership(globalGroupMembership);
|
561 |
#endif
|
562 |
|
563 |
//fill molMembership
|
564 |
std::vector<int> globalMolMembership(info->getNGlobalAtoms(), 0);
|
565 |
|
566 |
for(mol = info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {
|
567 |
|
568 |
for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
|
569 |
globalMolMembership[atom->getGlobalIndex()] = mol->getGlobalIndex();
|
570 |
}
|
571 |
}
|
572 |
|
573 |
#ifdef IS_MPI
|
574 |
std::vector<int> tmpMolMembership(nGlobalAtoms, 0);
|
575 |
|
576 |
MPI_Allreduce(&globalMolMembership[0], &tmpMolMembership[0], nGlobalAtoms,
|
577 |
MPI_INT, MPI_SUM, MPI_COMM_WORLD);
|
578 |
|
579 |
info->setGlobalMolMembership(tmpMolMembership);
|
580 |
#else
|
581 |
info->setGlobalMolMembership(globalMolMembership);
|
582 |
#endif
|
583 |
|
584 |
}
|
585 |
|
586 |
void SimCreator::loadCoordinates(SimInfo* info) {
|
587 |
Globals* simParams;
|
588 |
simParams = info->getSimParams();
|
589 |
|
590 |
if (!simParams->haveInitialConfig()) {
|
591 |
sprintf(painCave.errMsg,
|
592 |
"Cannot intialize a simulation without an initial configuration file.\n");
|
593 |
painCave.isFatal = 1;;
|
594 |
simError();
|
595 |
}
|
596 |
|
597 |
DumpReader reader(info, simParams->getInitialConfig());
|
598 |
int nframes = reader.getNFrames();
|
599 |
|
600 |
if (nframes > 0) {
|
601 |
reader.readFrame(nframes - 1);
|
602 |
} else {
|
603 |
//invalid initial coordinate file
|
604 |
sprintf(painCave.errMsg, "Initial configuration file %s should at least contain one frame\n",
|
605 |
simParams->getInitialConfig());
|
606 |
painCave.isFatal = 1;
|
607 |
simError();
|
608 |
}
|
609 |
|
610 |
//copy the current snapshot to previous snapshot
|
611 |
info->getSnapshotManager()->advance();
|
612 |
}
|
613 |
|
614 |
} //end namespace oopse
|
615 |
|
616 |
|