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Comparing trunk/OOPSE-2.0/src/brains/SimCreator.cpp (file contents):
Revision 2100 by gezelter, Tue Mar 8 21:06:49 2005 UTC vs.
Revision 2101 by chrisfen, Thu Mar 10 15:10:24 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      
181 <
181 >    
182      //load initial coordinates, some extra information are pushed into SimInfo's property map ( such as
183      //eta, chi for NPT integrator)
184      if (loadInitCoords)
# Line 185 | Line 186 | namespace oopse {
186      
187      return info;
188    }
189 <
189 >  
190    void SimCreator::gatherParameters(SimInfo *info, const std::string& mdfile) {
191 <
191 >    
192      //figure out the ouput file names
193      std::string prefix;
194 <
194 >    
195   #ifdef IS_MPI
196 <
196 >    
197      if (worldRank == 0) {
198   #endif // is_mpi
199        Globals * simParams = info->getSimParams();
# Line 201 | Line 202 | namespace oopse {
202        } else {
203          prefix = getPrefix(mdfile);
204        }
205 <
205 >      
206        info->setFinalConfigFileName(prefix + ".eor");
207        info->setDumpFileName(prefix + ".dump");
208        info->setStatFileName(prefix + ".stat");
209 <
209 >      info->setRestFileName(prefix + ".zang");
210 >      
211   #ifdef IS_MPI
212 <
212 >      
213      }
214 <
214 >    
215   #endif
216 <
216 >    
217    }
218 <
218 >  
219   #ifdef IS_MPI
220    void SimCreator::divideMolecules(SimInfo *info) {
221      double numerator;
# Line 237 | Line 239 | namespace oopse {
239      std::vector<int> molToProcMap(nGlobalMols, -1); // default to an error condition:
240      
241      MPI_Comm_size(MPI_COMM_WORLD, &nProcessors);
242 <
242 >    
243      if (nProcessors > nGlobalMols) {
244        sprintf(painCave.errMsg,
245                "nProcessors (%d) > nMol (%d)\n"
# Line 246 | Line 248 | namespace oopse {
248                "\tusable division of atoms for force decomposition.\n"
249                "\tEither try a smaller number of processors, or run the\n"
250                "\tsingle-processor version of OOPSE.\n", nProcessors, nGlobalMols);
251 <
251 >      
252        painCave.isFatal = 1;
253        simError();
254      }
255 <
255 >    
256      int seedValue;
257      Globals * simParams = info->getSimParams();
258      SeqRandNumGen* myRandom; //divide labor does not need Parallel random number generator
# Line 260 | Line 262 | namespace oopse {
262      }else {
263        myRandom = new SeqRandNumGen();
264      }  
265 <
266 <
265 >    
266 >    
267      a = 3.0 * nGlobalMols / info->getNGlobalAtoms();
268 <
268 >    
269      //initialize atomsPerProc
270      atomsPerProc.insert(atomsPerProc.end(), nProcessors, 0);
271 <
271 >    
272      if (worldRank == 0) {
273        numerator = info->getNGlobalAtoms();
274        denominator = nProcessors;
275        precast = numerator / denominator;
276        nTarget = (int)(precast + 0.5);
277 <
277 >      
278        for(i = 0; i < nGlobalMols; i++) {
279          done = 0;
280          loops = 0;
281 <
281 >        
282          while (!done) {
283            loops++;
284 <
284 >          
285            // Pick a processor at random
286 <
286 >          
287            which_proc = (int) (myRandom->rand() * nProcessors);
288 <
288 >          
289            //get the molecule stamp first
290            int stampId = info->getMoleculeStampId(i);
291            MoleculeStamp * moleculeStamp = info->getMoleculeStamp(stampId);
292 <
292 >          
293            // How many atoms does this processor have so far?
294            old_atoms = atomsPerProc[which_proc];
295            add_atoms = moleculeStamp->getNAtoms();
296            new_atoms = old_atoms + add_atoms;
297 <
297 >          
298            // If we've been through this loop too many times, we need
299            // to just give up and assign the molecule to this processor
300            // and be done with it.
301 <
301 >          
302            if (loops > 100) {
303              sprintf(painCave.errMsg,
304                      "I've tried 100 times to assign molecule %d to a "
305                      " processor, but can't find a good spot.\n"
306                      "I'm assigning it at random to processor %d.\n",
307                      i, which_proc);
308 <
308 >            
309              painCave.isFatal = 0;
310              simError();
311 <
311 >            
312              molToProcMap[i] = which_proc;
313              atomsPerProc[which_proc] += add_atoms;
314 <
314 >            
315              done = 1;
316              continue;
317            }
318 <
318 >          
319            // If we can add this molecule to this processor without sending
320            // it above nTarget, then go ahead and do it:
321 <
321 >          
322            if (new_atoms <= nTarget) {
323              molToProcMap[i] = which_proc;
324              atomsPerProc[which_proc] += add_atoms;
325 <
325 >            
326              done = 1;
327              continue;
328            }
329 <
329 >          
330            // The only situation left is when new_atoms > nTarget.  We
331            // want to accept this with some probability that dies off the
332            // farther we are from nTarget
333 <
333 >          
334            // roughly:  x = new_atoms - nTarget
335            //           Pacc(x) = exp(- a * x)
336            // where a = penalty / (average atoms per molecule)
337 <
337 >          
338            x = (double)(new_atoms - nTarget);
339            y = myRandom->rand();
340 <
340 >          
341            if (y < exp(- a * x)) {
342              molToProcMap[i] = which_proc;
343              atomsPerProc[which_proc] += add_atoms;
344 <
344 >            
345              done = 1;
346              continue;
347            } else {
# Line 347 | Line 349 | namespace oopse {
349            }
350          }
351        }
352 <
352 >      
353        delete myRandom;
354 <        
354 >      
355        // Spray out this nonsense to all other processors:
356 <
356 >      
357        MPI_Bcast(&molToProcMap[0], nGlobalMols, MPI_INT, 0, MPI_COMM_WORLD);
358      } else {
359 <
359 >      
360        // Listen to your marching orders from processor 0:
361 <
361 >      
362        MPI_Bcast(&molToProcMap[0], nGlobalMols, MPI_INT, 0, MPI_COMM_WORLD);
363      }
364 <
364 >    
365      info->setMolToProcMap(molToProcMap);
366      sprintf(checkPointMsg,
367              "Successfully divided the molecules among the processors.\n");
368      MPIcheckPoint();
369    }
370 <
370 >  
371   #endif
372 <
372 >  
373    void SimCreator::createMolecules(SimInfo *info) {
374      MoleculeCreator molCreator;
375      int stampId;
376 <
376 >    
377      for(int i = 0; i < info->getNGlobalMolecules(); i++) {
378 <
378 >      
379   #ifdef IS_MPI
380 <
380 >      
381        if (info->getMolToProc(i) == worldRank) {
382   #endif
383 <
383 >        
384          stampId = info->getMoleculeStampId(i);
385          Molecule * mol = molCreator.createMolecule(info->getForceField(), info->getMoleculeStamp(stampId),
386                                                     stampId, i, info->getLocalIndexManager());
387 <
387 >        
388          info->addMolecule(mol);
389 <
389 >        
390   #ifdef IS_MPI
391 <
391 >        
392        }
393 <
393 >      
394   #endif
395 <
395 >      
396      } //end for(int i=0)  
397    }
398 <
398 >  
399    void SimCreator::compList(MakeStamps *stamps, Globals* simParams,
400                              std::vector < std::pair<MoleculeStamp *, int> > &moleculeStampPairs) {
401      int i;
# Line 402 | Line 404 | namespace oopse {
404      MoleculeStamp * currentStamp;
405      Component** the_components = simParams->getComponents();
406      int n_components = simParams->getNComponents();
407 <
407 >    
408      if (!simParams->haveNMol()) {
409        // we don't have the total number of molecules, so we assume it is
410        // given in each component
411 <
411 >      
412        for(i = 0; i < n_components; i++) {
413          if (!the_components[i]->haveNMol()) {
414            // we have a problem
415            sprintf(painCave.errMsg,
416                    "SimCreator Error. No global NMol or component NMol given.\n"
417                    "\tCannot calculate the number of atoms.\n");
418 <
418 >          
419            painCave.isFatal = 1;
420            simError();
421          }
422 <      
422 >        
423          id = the_components[i]->getType();
424 <
424 >        
425          extractedStamp = stamps->extractMolStamp(id);
426          if (extractedStamp == NULL) {
427            sprintf(painCave.errMsg,
428                    "SimCreator error: Component \"%s\" was not found in the "
429                    "list of declared molecules\n", id);
430 <
430 >          
431            painCave.isFatal = 1;
432            simError();
433          }
434 <
434 >        
435          currentStamp = extractedStamp->getStamp();
436 <
437 <
436 >        
437 >        
438          moleculeStampPairs.push_back(
439                                       std::make_pair(currentStamp, the_components[i]->getNMol()));
440        } //end for (i = 0; i < n_components; i++)
# Line 442 | Line 444 | namespace oopse {
444                " nMols and then give molfractions in the components\n"
445                "\tis not currently supported."
446                " Please give nMol in the components.\n");
447 <
447 >      
448        painCave.isFatal = 1;
449        simError();
450      }
451 <
451 >    
452   #ifdef IS_MPI
453 <
453 >    
454      strcpy(checkPointMsg, "Component stamps successfully extracted\n");
455      MPIcheckPoint();
456 <
456 >    
457   #endif // is_mpi
458 <
458 >    
459    }
460 <
460 >  
461    void SimCreator::setGlobalIndex(SimInfo *info) {
462      SimInfo::MoleculeIterator mi;
463      Molecule::AtomIterator ai;
# Line 471 | Line 473 | namespace oopse {
473      int nGlobalAtoms = info->getNGlobalAtoms();
474      
475   #ifndef IS_MPI
476 <
476 >    
477      beginAtomIndex = 0;
478      beginRigidBodyIndex = 0;
479      beginCutoffGroupIndex = 0;
480 <
480 >    
481   #else
482 <
482 >    
483      int nproc;
484      int myNode;
485 <
485 >    
486      myNode = worldRank;
487      MPI_Comm_size(MPI_COMM_WORLD, &nproc);
488 <
488 >    
489      std::vector < int > tmpAtomsInProc(nproc, 0);
490      std::vector < int > tmpRigidBodiesInProc(nproc, 0);
491      std::vector < int > tmpCutoffGroupsInProc(nproc, 0);
492      std::vector < int > NumAtomsInProc(nproc, 0);
493      std::vector < int > NumRigidBodiesInProc(nproc, 0);
494      std::vector < int > NumCutoffGroupsInProc(nproc, 0);
495 <
495 >    
496      tmpAtomsInProc[myNode] = info->getNAtoms();
497      tmpRigidBodiesInProc[myNode] = info->getNRigidBodies();
498      tmpCutoffGroupsInProc[myNode] = info->getNCutoffGroups();
499 <
499 >    
500      //do MPI_ALLREDUCE to exchange the total number of atoms, rigidbodies and cutoff groups
501      MPI_Allreduce(&tmpAtomsInProc[0], &NumAtomsInProc[0], nproc, MPI_INT,
502                    MPI_SUM, MPI_COMM_WORLD);
# Line 502 | Line 504 | namespace oopse {
504                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
505      MPI_Allreduce(&tmpCutoffGroupsInProc[0], &NumCutoffGroupsInProc[0], nproc,
506                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
507 <
507 >    
508      beginAtomIndex = 0;
509      beginRigidBodyIndex = 0;
510      beginCutoffGroupIndex = 0;
511 <
511 >    
512      for(int i = 0; i < myNode; i++) {
513        beginAtomIndex += NumAtomsInProc[i];
514        beginRigidBodyIndex += NumRigidBodiesInProc[i];
515        beginCutoffGroupIndex += NumCutoffGroupsInProc[i];
516      }
517 <
517 >    
518   #endif
519 <
519 >    
520      //rigidbody's index begins right after atom's
521      beginRigidBodyIndex += info->getNGlobalAtoms();
522 <
522 >    
523      for(mol = info->beginMolecule(mi); mol != NULL;
524          mol = info->nextMolecule(mi)) {
525 <
525 >      
526        //local index(index in DataStorge) of atom is important
527        for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
528          atom->setGlobalIndex(beginAtomIndex++);
529        }
530 <
530 >      
531        for(rb = mol->beginRigidBody(ri); rb != NULL;
532            rb = mol->nextRigidBody(ri)) {
533          rb->setGlobalIndex(beginRigidBodyIndex++);
534        }
535 <
535 >      
536        //local index of cutoff group is trivial, it only depends on the order of travesing
537        for(cg = mol->beginCutoffGroup(ci); cg != NULL;
538            cg = mol->nextCutoffGroup(ci)) {
539          cg->setGlobalIndex(beginCutoffGroupIndex++);
540        }
541      }
542 <
542 >    
543      //fill globalGroupMembership
544      std::vector<int> globalGroupMembership(info->getNGlobalAtoms(), 0);
545      for(mol = info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {        
546        for (cg = mol->beginCutoffGroup(ci); cg != NULL; cg = mol->nextCutoffGroup(ci)) {
547 <
547 >        
548          for(atom = cg->beginAtom(ai); atom != NULL; atom = cg->nextAtom(ai)) {
549            globalGroupMembership[atom->getGlobalIndex()] = cg->getGlobalIndex();
550          }
551 <
551 >        
552        }      
553      }
554 <
554 >    
555   #ifdef IS_MPI    
556      // Since the globalGroupMembership has been zero filled and we've only
557      // poked values into the atoms we know, we can do an Allreduce
# Line 563 | Line 565 | namespace oopse {
565   #else
566      info->setGlobalGroupMembership(globalGroupMembership);
567   #endif
568 <
568 >    
569      //fill molMembership
570      std::vector<int> globalMolMembership(info->getNGlobalAtoms(), 0);
571      
572      for(mol = info->beginMolecule(mi); mol != NULL; mol = info->nextMolecule(mi)) {
573 <
573 >      
574        for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
575          globalMolMembership[atom->getGlobalIndex()] = mol->getGlobalIndex();
576        }
577      }
578 <
578 >    
579   #ifdef IS_MPI
580      std::vector<int> tmpMolMembership(nGlobalAtoms, 0);
581 <
581 >    
582      MPI_Allreduce(&globalMolMembership[0], &tmpMolMembership[0], nGlobalAtoms,
583                    MPI_INT, MPI_SUM, MPI_COMM_WORLD);
584      
# Line 584 | Line 586 | namespace oopse {
586   #else
587      info->setGlobalMolMembership(globalMolMembership);
588   #endif
589 <
589 >    
590    }
591 <
591 >  
592    void SimCreator::loadCoordinates(SimInfo* info) {
593      Globals* simParams;
594      simParams = info->getSimParams();
# Line 597 | Line 599 | namespace oopse {
599        painCave.isFatal = 1;;
600        simError();
601      }
602 <        
602 >    
603      DumpReader reader(info, simParams->getInitialConfig());
604      int nframes = reader.getNFrames();
605 <
605 >    
606      if (nframes > 0) {
607        reader.readFrame(nframes - 1);
608      } else {
609        //invalid initial coordinate file
610 <      sprintf(painCave.errMsg, "Initial configuration file %s should at least contain one frame\n",
610 >      sprintf(painCave.errMsg,
611 >              "Initial configuration file %s should at least contain one frame\n",
612                simParams->getInitialConfig());
613        painCave.isFatal = 1;
614        simError();
615      }
616 <
616 >    
617      //copy the current snapshot to previous snapshot
618      info->getSnapshotManager()->advance();
619    }
620 <
620 >  
621   } //end namespace oopse
622  
623  

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