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Comparing trunk/OOPSE-3.0/src/brains/SimCreator.cpp (file contents):
Revision 2087 by gezelter, Tue Mar 8 21:06:49 2005 UTC vs.
Revision 2187 by tim, Wed Apr 13 18:41:17 2005 UTC

# Line 62 | Line 62 | namespace oopse {
62   #endif
63  
64   namespace oopse {
65 <
66 <  void SimCreator::parseFile(const std::string mdFileName,  MakeStamps* stamps, Globals* simParams){
67 <
65 >  
66 >  void SimCreator::parseFile(const std::string mdFileName,  MakeStamps* stamps,
67 >                             Globals* simParams){
68 >    
69   #ifdef IS_MPI
70 <
70 >    
71      if (worldRank == 0) {
72   #endif // is_mpi
73 <
73 >      
74        simParams->initalize();
75        set_interface_stamps(stamps, simParams);
76 <
76 >      
77   #ifdef IS_MPI
78 <
78 >      
79        mpiEventInit();
80 <
80 >      
81   #endif
82 <
82 >      
83        yacc_BASS(mdFileName.c_str());
84 <
84 >      
85   #ifdef IS_MPI
86 <
86 >      
87        throwMPIEvent(NULL);
88      } else {
89        set_interface_stamps(stamps, simParams);
# Line 90 | Line 91 | namespace oopse {
91        MPIcheckPoint();
92        mpiEventLoop();
93      }
94 <
94 >    
95   #endif
96 <
96 >    
97    }
98 <
98 >  
99    SimInfo*  SimCreator::createSim(const std::string & mdFileName, bool loadInitCoords) {
100      
101      MakeStamps * stamps = new MakeStamps();
102 <
102 >    
103      Globals * simParams = new Globals();
104 <
104 >    
105      //parse meta-data file
106      parseFile(mdFileName, stamps, simParams);
107 <
107 >    
108      //create the force field
109      ForceField * ff = ForceFieldFactory::getInstance()->createForceField(
110                                                                           simParams->getForceField());
# Line 114 | Line 115 | namespace oopse {
115        painCave.isFatal = 1;
116        simError();
117      }
118 <
118 >    
119      if (simParams->haveForceFieldFileName()) {
120        ff->setForceFieldFileName(simParams->getForceFieldFileName());
121      }
122      
123      std::string forcefieldFileName;
124      forcefieldFileName = ff->getForceFieldFileName();
125 <
125 >    
126      if (simParams->haveForceFieldVariant()) {
127        //If the force field has variant, the variant force field name will be
128        //Base.variant.frc. For exampel EAM.u6.frc
129 <        
129 >      
130        std::string variant = simParams->getForceFieldVariant();
131 <
131 >      
132        std::string::size_type pos = forcefieldFileName.rfind(".frc");
133        variant = "." + variant;
134        if (pos != std::string::npos) {
# Line 143 | Line 144 | namespace oopse {
144      //extract the molecule stamps
145      std::vector < std::pair<MoleculeStamp *, int> > moleculeStampPairs;
146      compList(stamps, simParams, moleculeStampPairs);
147 <
147 >    
148      //create SimInfo
149 <    SimInfo * info = new SimInfo(moleculeStampPairs, ff, simParams);
150 <
149 >    SimInfo * info = new SimInfo(stamps, moleculeStampPairs, ff, simParams);
150 >    
151      //gather parameters (SimCreator only retrieves part of the parameters)
152      gatherParameters(info, mdFileName);
153 <
153 >    
154      //divide the molecules and determine the global index of molecules
155   #ifdef IS_MPI
156      divideMolecules(info);
157   #endif
158 <
158 >    
159      //create the molecules
160      createMolecules(info);
161 <
162 <
161 >    
162 >    
163      //allocate memory for DataStorage(circular reference, need to break it)
164      info->setSnapshotManager(new SimSnapshotManager(info));
165      
# Line 166 | Line 167 | namespace oopse {
167      //global index will never change again). Local indices of atoms and rigidbodies are already set by
168      //MoleculeCreator class which actually delegates the responsibility to LocalIndexManager.
169      setGlobalIndex(info);
170 <
170 >    
171      //Alought addExculdePairs is called inside SimInfo's addMolecule method, at that point
172      //atoms don't have the global index yet  (their global index are all initialized to -1).
173      //Therefore we have to call addExcludePairs explicitly here. A way to work around is that
# Line 177 | Line 178 | namespace oopse {
178        info->addExcludePairs(mol);
179      }
180      
180
181    //load initial coordinates, some extra information are pushed into SimInfo's property map ( such as
182    //eta, chi for NPT integrator)
181      if (loadInitCoords)
182        loadCoordinates(info);    
183      
184      return info;
185    }
186 <
186 >  
187    void SimCreator::gatherParameters(SimInfo *info, const std::string& mdfile) {
188 <
188 >    
189      //figure out the ouput file names
190      std::string prefix;
191 <
191 >    
192   #ifdef IS_MPI
193 <
193 >    
194      if (worldRank == 0) {
195   #endif // is_mpi
196        Globals * simParams = info->getSimParams();
# Line 201 | Line 199 | namespace oopse {
199        } else {
200          prefix = getPrefix(mdfile);
201        }
202 <
202 >      
203        info->setFinalConfigFileName(prefix + ".eor");
204        info->setDumpFileName(prefix + ".dump");
205        info->setStatFileName(prefix + ".stat");
206 <
206 >      info->setRestFileName(prefix + ".zang");
207 >      
208   #ifdef IS_MPI
209 <
209 >      
210      }
211 <
212 < #endif
213 <
211 >    
212 > #endif
213 >    
214    }
215 <
215 >  
216   #ifdef IS_MPI
217    void SimCreator::divideMolecules(SimInfo *info) {
218      double numerator;
# Line 237 | Line 236 | namespace oopse {
236      std::vector<int> molToProcMap(nGlobalMols, -1); // default to an error condition:
237      
238      MPI_Comm_size(MPI_COMM_WORLD, &nProcessors);
239 <
239 >    
240      if (nProcessors > nGlobalMols) {
241        sprintf(painCave.errMsg,
242                "nProcessors (%d) > nMol (%d)\n"
# Line 246 | Line 245 | namespace oopse {
245                "\tusable division of atoms for force decomposition.\n"
246                "\tEither try a smaller number of processors, or run the\n"
247                "\tsingle-processor version of OOPSE.\n", nProcessors, nGlobalMols);
248 <
248 >      
249        painCave.isFatal = 1;
250        simError();
251      }
252 <
252 >    
253      int seedValue;
254      Globals * simParams = info->getSimParams();
255      SeqRandNumGen* myRandom; //divide labor does not need Parallel random number generator
# Line 260 | Line 259 | namespace oopse {
259      }else {
260        myRandom = new SeqRandNumGen();
261      }  
262 <
263 <
262 >    
263 >    
264      a = 3.0 * nGlobalMols / info->getNGlobalAtoms();
265 <
265 >    
266      //initialize atomsPerProc
267      atomsPerProc.insert(atomsPerProc.end(), nProcessors, 0);
268 <
268 >    
269      if (worldRank == 0) {
270        numerator = info->getNGlobalAtoms();
271        denominator = nProcessors;
272        precast = numerator / denominator;
273        nTarget = (int)(precast + 0.5);
274 <
274 >      
275        for(i = 0; i < nGlobalMols; i++) {
276          done = 0;
277          loops = 0;
278 <
278 >        
279          while (!done) {
280            loops++;
281 <
281 >          
282            // Pick a processor at random
283 <
283 >          
284            which_proc = (int) (myRandom->rand() * nProcessors);
285 <
285 >          
286            //get the molecule stamp first
287            int stampId = info->getMoleculeStampId(i);
288            MoleculeStamp * moleculeStamp = info->getMoleculeStamp(stampId);
289 <
289 >          
290            // How many atoms does this processor have so far?
291            old_atoms = atomsPerProc[which_proc];
292            add_atoms = moleculeStamp->getNAtoms();
293            new_atoms = old_atoms + add_atoms;
294 <
294 >          
295            // If we've been through this loop too many times, we need
296            // to just give up and assign the molecule to this processor
297            // and be done with it.
298 <
298 >          
299            if (loops > 100) {
300              sprintf(painCave.errMsg,
301                      "I've tried 100 times to assign molecule %d to a "
302                      " processor, but can't find a good spot.\n"
303                      "I'm assigning it at random to processor %d.\n",
304                      i, which_proc);
305 <
305 >            
306              painCave.isFatal = 0;
307              simError();
308 <
308 >            
309              molToProcMap[i] = which_proc;
310              atomsPerProc[which_proc] += add_atoms;
311 <
311 >            
312              done = 1;
313              continue;
314            }
315 <
315 >          
316            // If we can add this molecule to this processor without sending
317            // it above nTarget, then go ahead and do it:
318 <
318 >          
319            if (new_atoms <= nTarget) {
320              molToProcMap[i] = which_proc;
321              atomsPerProc[which_proc] += add_atoms;
322 <
322 >            
323              done = 1;
324              continue;
325            }
326 <
326 >          
327            // The only situation left is when new_atoms > nTarget.  We
328            // want to accept this with some probability that dies off the
329            // farther we are from nTarget
330 <
330 >          
331            // roughly:  x = new_atoms - nTarget
332            //           Pacc(x) = exp(- a * x)
333            // where a = penalty / (average atoms per molecule)
334 <
334 >          
335            x = (double)(new_atoms - nTarget);
336            y = myRandom->rand();
337 <
337 >          
338            if (y < exp(- a * x)) {
339              molToProcMap[i] = which_proc;
340              atomsPerProc[which_proc] += add_atoms;
341 <
341 >            
342              done = 1;
343              continue;
344            } else {
# Line 347 | Line 346 | namespace oopse {
346            }
347          }
348        }
349 <
349 >      
350        delete myRandom;
351 <        
351 >      
352        // Spray out this nonsense to all other processors:
353 <
353 >      
354        MPI_Bcast(&molToProcMap[0], nGlobalMols, MPI_INT, 0, MPI_COMM_WORLD);
355      } else {
356 <
356 >      
357        // Listen to your marching orders from processor 0:
358 <
358 >      
359        MPI_Bcast(&molToProcMap[0], nGlobalMols, MPI_INT, 0, MPI_COMM_WORLD);
360      }
361 <
361 >    
362      info->setMolToProcMap(molToProcMap);
363      sprintf(checkPointMsg,
364              "Successfully divided the molecules among the processors.\n");
365      MPIcheckPoint();
366    }
367 <
367 >  
368   #endif
369 <
369 >  
370    void SimCreator::createMolecules(SimInfo *info) {
371      MoleculeCreator molCreator;
372      int stampId;
373 <
373 >    
374      for(int i = 0; i < info->getNGlobalMolecules(); i++) {
375 <
375 >      
376   #ifdef IS_MPI
377 <
377 >      
378        if (info->getMolToProc(i) == worldRank) {
379   #endif
380 <
380 >        
381          stampId = info->getMoleculeStampId(i);
382          Molecule * mol = molCreator.createMolecule(info->getForceField(), info->getMoleculeStamp(stampId),
383                                                     stampId, i, info->getLocalIndexManager());
384 <
384 >        
385          info->addMolecule(mol);
386 <
386 >        
387   #ifdef IS_MPI
388 <
388 >        
389        }
390 <
390 >      
391   #endif
392 <
392 >      
393      } //end for(int i=0)  
394    }
395 <
395 >  
396    void SimCreator::compList(MakeStamps *stamps, Globals* simParams,
397                              std::vector < std::pair<MoleculeStamp *, int> > &moleculeStampPairs) {
398      int i;
399      char * id;
401    LinkedMolStamp* extractedStamp = NULL;
400      MoleculeStamp * currentStamp;
401      Component** the_components = simParams->getComponents();
402      int n_components = simParams->getNComponents();
403 <
403 >    
404      if (!simParams->haveNMol()) {
405        // we don't have the total number of molecules, so we assume it is
406        // given in each component
407 <
407 >      
408        for(i = 0; i < n_components; i++) {
409          if (!the_components[i]->haveNMol()) {
410            // we have a problem
411            sprintf(painCave.errMsg,
412                    "SimCreator Error. No global NMol or component NMol given.\n"
413                    "\tCannot calculate the number of atoms.\n");
414 <
414 >          
415            painCave.isFatal = 1;
416            simError();
417          }
418 <      
418 >        
419          id = the_components[i]->getType();
420  
421 <        extractedStamp = stamps->extractMolStamp(id);
422 <        if (extractedStamp == NULL) {
421 >        currentStamp = stamps->getMolStamp(id);
422 >        if (currentStamp == NULL) {
423            sprintf(painCave.errMsg,
424                    "SimCreator error: Component \"%s\" was not found in the "
425                    "list of declared molecules\n", id);
426 <
426 >          
427            painCave.isFatal = 1;
428            simError();
429          }
430 <
433 <        currentStamp = extractedStamp->getStamp();
434 <
435 <
430 >        
431          moleculeStampPairs.push_back(
432                                       std::make_pair(currentStamp, the_components[i]->getNMol()));
433        } //end for (i = 0; i < n_components; i++)
# Line 442 | Line 437 | namespace oopse {
437                " nMols and then give molfractions in the components\n"
438                "\tis not currently supported."
439                " Please give nMol in the components.\n");
440 <
440 >      
441        painCave.isFatal = 1;
442        simError();
443      }
444 <
444 >    
445   #ifdef IS_MPI
446 <
446 >    
447      strcpy(checkPointMsg, "Component stamps successfully extracted\n");
448      MPIcheckPoint();
449 <
449 >    
450   #endif // is_mpi
451 <
451 >    
452    }
453 <
453 >  
454    void SimCreator::setGlobalIndex(SimInfo *info) {
455      SimInfo::MoleculeIterator mi;
456      Molecule::AtomIterator ai;
# Line 471 | Line 466 | namespace oopse {
466      int nGlobalAtoms = info->getNGlobalAtoms();
467      
468   #ifndef IS_MPI
469 <
469 >    
470      beginAtomIndex = 0;
471      beginRigidBodyIndex = 0;
472      beginCutoffGroupIndex = 0;
473 <
473 >    
474   #else
475 <
475 >    
476      int nproc;
477      int myNode;
478 <
478 >    
479      myNode = worldRank;
480      MPI_Comm_size(MPI_COMM_WORLD, &nproc);
481 <
481 >    
482      std::vector < int > tmpAtomsInProc(nproc, 0);
483      std::vector < int > tmpRigidBodiesInProc(nproc, 0);
484      std::vector < int > tmpCutoffGroupsInProc(nproc, 0);
485      std::vector < int > NumAtomsInProc(nproc, 0);
486      std::vector < int > NumRigidBodiesInProc(nproc, 0);
487      std::vector < int > NumCutoffGroupsInProc(nproc, 0);
488 <
488 >    
489      tmpAtomsInProc[myNode] = info->getNAtoms();
490      tmpRigidBodiesInProc[myNode] = info->getNRigidBodies();
491      tmpCutoffGroupsInProc[myNode] = info->getNCutoffGroups();
492 <
492 >    
493      //do MPI_ALLREDUCE to exchange the total number of atoms, rigidbodies and cutoff groups
494      MPI_Allreduce(&tmpAtomsInProc[0], &NumAtomsInProc[0], nproc, MPI_INT,
495                    MPI_SUM, MPI_COMM_WORLD);
# Line 502 | Line 497 | namespace oopse {
497                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
498      MPI_Allreduce(&tmpCutoffGroupsInProc[0], &NumCutoffGroupsInProc[0], nproc,
499                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
500 <
500 >    
501      beginAtomIndex = 0;
502      beginRigidBodyIndex = 0;
503      beginCutoffGroupIndex = 0;
504 <
504 >    
505      for(int i = 0; i < myNode; i++) {
506        beginAtomIndex += NumAtomsInProc[i];
507        beginRigidBodyIndex += NumRigidBodiesInProc[i];
508        beginCutoffGroupIndex += NumCutoffGroupsInProc[i];
509      }
510 <
510 >    
511   #endif
512 <
512 >    
513      //rigidbody's index begins right after atom's
514      beginRigidBodyIndex += info->getNGlobalAtoms();
515 <
515 >    
516      for(mol = info->beginMolecule(mi); mol != NULL;
517          mol = info->nextMolecule(mi)) {
518 <
518 >      
519        //local index(index in DataStorge) of atom is important
520        for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
521          atom->setGlobalIndex(beginAtomIndex++);
522        }
523 <
523 >      
524        for(rb = mol->beginRigidBody(ri); rb != NULL;
525            rb = mol->nextRigidBody(ri)) {
526          rb->setGlobalIndex(beginRigidBodyIndex++);
527        }
528 <
528 >      
529        //local index of cutoff group is trivial, it only depends on the order of travesing
530        for(cg = mol->beginCutoffGroup(ci); cg != NULL;
531            cg = mol->nextCutoffGroup(ci)) {
532          cg->setGlobalIndex(beginCutoffGroupIndex++);
533        }
534      }
535 <
535 >    
536      //fill globalGroupMembership
537      std::vector<int> globalGroupMembership(info->getNGlobalAtoms(), 0);
538      for(mol = info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {        
539        for (cg = mol->beginCutoffGroup(ci); cg != NULL; cg = mol->nextCutoffGroup(ci)) {
540 <
540 >        
541          for(atom = cg->beginAtom(ai); atom != NULL; atom = cg->nextAtom(ai)) {
542            globalGroupMembership[atom->getGlobalIndex()] = cg->getGlobalIndex();
543          }
544 <
544 >        
545        }      
546      }
547 <
547 >    
548   #ifdef IS_MPI    
549      // Since the globalGroupMembership has been zero filled and we've only
550      // poked values into the atoms we know, we can do an Allreduce
# Line 563 | Line 558 | namespace oopse {
558   #else
559      info->setGlobalGroupMembership(globalGroupMembership);
560   #endif
561 <
561 >    
562      //fill molMembership
563      std::vector<int> globalMolMembership(info->getNGlobalAtoms(), 0);
564      
565      for(mol = info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {
566 <
566 >      
567        for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
568          globalMolMembership[atom->getGlobalIndex()] = mol->getGlobalIndex();
569        }
570      }
571 <
571 >    
572   #ifdef IS_MPI
573      std::vector<int> tmpMolMembership(nGlobalAtoms, 0);
574 <
574 >    
575      MPI_Allreduce(&globalMolMembership[0], &tmpMolMembership[0], nGlobalAtoms,
576                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
577      
# Line 584 | Line 579 | namespace oopse {
579   #else
580      info->setGlobalMolMembership(globalMolMembership);
581   #endif
582 <
582 >    
583    }
584 <
584 >  
585    void SimCreator::loadCoordinates(SimInfo* info) {
586      Globals* simParams;
587      simParams = info->getSimParams();
# Line 597 | Line 592 | namespace oopse {
592        painCave.isFatal = 1;;
593        simError();
594      }
595 <        
595 >    
596      DumpReader reader(info, simParams->getInitialConfig());
597      int nframes = reader.getNFrames();
598 <
598 >    
599      if (nframes > 0) {
600        reader.readFrame(nframes - 1);
601      } else {
602        //invalid initial coordinate file
603 <      sprintf(painCave.errMsg, "Initial configuration file %s should at least contain one frame\n",
603 >      sprintf(painCave.errMsg,
604 >              "Initial configuration file %s should at least contain one frame\n",
605                simParams->getInitialConfig());
606        painCave.isFatal = 1;
607        simError();
608      }
609 <
609 >    
610      //copy the current snapshot to previous snapshot
611      info->getSnapshotManager()->advance();
612    }
613 <
613 >  
614   } //end namespace oopse
615  
616  

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