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Comparing trunk/OOPSE-2.0/src/brains/SimCreator.cpp (file contents):
Revision 2087 by gezelter, Tue Mar 8 21:06:49 2005 UTC vs.
Revision 2120 by tim, Fri Mar 11 17:50:11 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 <
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 <
211 >    
212   #endif
213 <
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;
# Line 402 | Line 401 | namespace oopse {
401      MoleculeStamp * currentStamp;
402      Component** the_components = simParams->getComponents();
403      int n_components = simParams->getNComponents();
404 <
404 >    
405      if (!simParams->haveNMol()) {
406        // we don't have the total number of molecules, so we assume it is
407        // given in each component
408 <
408 >      
409        for(i = 0; i < n_components; i++) {
410          if (!the_components[i]->haveNMol()) {
411            // we have a problem
412            sprintf(painCave.errMsg,
413                    "SimCreator Error. No global NMol or component NMol given.\n"
414                    "\tCannot calculate the number of atoms.\n");
415 <
415 >          
416            painCave.isFatal = 1;
417            simError();
418          }
419 <      
419 >        
420          id = the_components[i]->getType();
421 <
421 >        
422          extractedStamp = stamps->extractMolStamp(id);
423          if (extractedStamp == NULL) {
424            sprintf(painCave.errMsg,
425                    "SimCreator error: Component \"%s\" was not found in the "
426                    "list of declared molecules\n", id);
427 <
427 >          
428            painCave.isFatal = 1;
429            simError();
430          }
431 <
431 >        
432          currentStamp = extractedStamp->getStamp();
433 <
434 <
433 >        
434 >        
435          moleculeStampPairs.push_back(
436                                       std::make_pair(currentStamp, the_components[i]->getNMol()));
437        } //end for (i = 0; i < n_components; i++)
# Line 442 | Line 441 | namespace oopse {
441                " nMols and then give molfractions in the components\n"
442                "\tis not currently supported."
443                " Please give nMol in the components.\n");
444 <
444 >      
445        painCave.isFatal = 1;
446        simError();
447      }
448 <
448 >    
449   #ifdef IS_MPI
450 <
450 >    
451      strcpy(checkPointMsg, "Component stamps successfully extracted\n");
452      MPIcheckPoint();
453 <
453 >    
454   #endif // is_mpi
455 <
455 >    
456    }
457 <
457 >  
458    void SimCreator::setGlobalIndex(SimInfo *info) {
459      SimInfo::MoleculeIterator mi;
460      Molecule::AtomIterator ai;
# Line 471 | Line 470 | namespace oopse {
470      int nGlobalAtoms = info->getNGlobalAtoms();
471      
472   #ifndef IS_MPI
473 <
473 >    
474      beginAtomIndex = 0;
475      beginRigidBodyIndex = 0;
476      beginCutoffGroupIndex = 0;
477 <
477 >    
478   #else
479 <
479 >    
480      int nproc;
481      int myNode;
482 <
482 >    
483      myNode = worldRank;
484      MPI_Comm_size(MPI_COMM_WORLD, &nproc);
485 <
485 >    
486      std::vector < int > tmpAtomsInProc(nproc, 0);
487      std::vector < int > tmpRigidBodiesInProc(nproc, 0);
488      std::vector < int > tmpCutoffGroupsInProc(nproc, 0);
489      std::vector < int > NumAtomsInProc(nproc, 0);
490      std::vector < int > NumRigidBodiesInProc(nproc, 0);
491      std::vector < int > NumCutoffGroupsInProc(nproc, 0);
492 <
492 >    
493      tmpAtomsInProc[myNode] = info->getNAtoms();
494      tmpRigidBodiesInProc[myNode] = info->getNRigidBodies();
495      tmpCutoffGroupsInProc[myNode] = info->getNCutoffGroups();
496 <
496 >    
497      //do MPI_ALLREDUCE to exchange the total number of atoms, rigidbodies and cutoff groups
498      MPI_Allreduce(&tmpAtomsInProc[0], &NumAtomsInProc[0], nproc, MPI_INT,
499                    MPI_SUM, MPI_COMM_WORLD);
# Line 502 | Line 501 | namespace oopse {
501                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
502      MPI_Allreduce(&tmpCutoffGroupsInProc[0], &NumCutoffGroupsInProc[0], nproc,
503                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
504 <
504 >    
505      beginAtomIndex = 0;
506      beginRigidBodyIndex = 0;
507      beginCutoffGroupIndex = 0;
508 <
508 >    
509      for(int i = 0; i < myNode; i++) {
510        beginAtomIndex += NumAtomsInProc[i];
511        beginRigidBodyIndex += NumRigidBodiesInProc[i];
512        beginCutoffGroupIndex += NumCutoffGroupsInProc[i];
513      }
514 <
514 >    
515   #endif
516 <
516 >    
517      //rigidbody's index begins right after atom's
518      beginRigidBodyIndex += info->getNGlobalAtoms();
519 <
519 >    
520      for(mol = info->beginMolecule(mi); mol != NULL;
521          mol = info->nextMolecule(mi)) {
522 <
522 >      
523        //local index(index in DataStorge) of atom is important
524        for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
525          atom->setGlobalIndex(beginAtomIndex++);
526        }
527 <
527 >      
528        for(rb = mol->beginRigidBody(ri); rb != NULL;
529            rb = mol->nextRigidBody(ri)) {
530          rb->setGlobalIndex(beginRigidBodyIndex++);
531        }
532 <
532 >      
533        //local index of cutoff group is trivial, it only depends on the order of travesing
534        for(cg = mol->beginCutoffGroup(ci); cg != NULL;
535            cg = mol->nextCutoffGroup(ci)) {
536          cg->setGlobalIndex(beginCutoffGroupIndex++);
537        }
538      }
539 <
539 >    
540      //fill globalGroupMembership
541      std::vector<int> globalGroupMembership(info->getNGlobalAtoms(), 0);
542      for(mol = info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {        
543        for (cg = mol->beginCutoffGroup(ci); cg != NULL; cg = mol->nextCutoffGroup(ci)) {
544 <
544 >        
545          for(atom = cg->beginAtom(ai); atom != NULL; atom = cg->nextAtom(ai)) {
546            globalGroupMembership[atom->getGlobalIndex()] = cg->getGlobalIndex();
547          }
548 <
548 >        
549        }      
550      }
551 <
551 >    
552   #ifdef IS_MPI    
553      // Since the globalGroupMembership has been zero filled and we've only
554      // poked values into the atoms we know, we can do an Allreduce
# Line 563 | Line 562 | namespace oopse {
562   #else
563      info->setGlobalGroupMembership(globalGroupMembership);
564   #endif
565 <
565 >    
566      //fill molMembership
567      std::vector<int> globalMolMembership(info->getNGlobalAtoms(), 0);
568      
569      for(mol = info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {
570 <
570 >      
571        for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
572          globalMolMembership[atom->getGlobalIndex()] = mol->getGlobalIndex();
573        }
574      }
575 <
575 >    
576   #ifdef IS_MPI
577      std::vector<int> tmpMolMembership(nGlobalAtoms, 0);
578 <
578 >    
579      MPI_Allreduce(&globalMolMembership[0], &tmpMolMembership[0], nGlobalAtoms,
580                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
581      
# Line 584 | Line 583 | namespace oopse {
583   #else
584      info->setGlobalMolMembership(globalMolMembership);
585   #endif
586 <
586 >    
587    }
588 <
588 >  
589    void SimCreator::loadCoordinates(SimInfo* info) {
590      Globals* simParams;
591      simParams = info->getSimParams();
# Line 597 | Line 596 | namespace oopse {
596        painCave.isFatal = 1;;
597        simError();
598      }
599 <        
599 >    
600      DumpReader reader(info, simParams->getInitialConfig());
601      int nframes = reader.getNFrames();
602 <
602 >    
603      if (nframes > 0) {
604        reader.readFrame(nframes - 1);
605      } else {
606        //invalid initial coordinate file
607 <      sprintf(painCave.errMsg, "Initial configuration file %s should at least contain one frame\n",
607 >      sprintf(painCave.errMsg,
608 >              "Initial configuration file %s should at least contain one frame\n",
609                simParams->getInitialConfig());
610        painCave.isFatal = 1;
611        simError();
612      }
613 <
613 >    
614      //copy the current snapshot to previous snapshot
615      info->getSnapshotManager()->advance();
616    }
617 <
617 >  
618   } //end namespace oopse
619  
620  

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