Liebe Gitlab-Nutzer, lieber Gitlab-Nutzer, es ist nun möglich sich mittels des ZIH-Logins/LDAP an unserem Dienst anzumelden. Ein Anmelden über dieses erzeugt ein neues Konto. Das alte Konto ist über den Reiter "Standard" erreichbar. Die Administratoren

Dear Gitlab user, it is now possible to log in to our service using the ZIH login/LDAP. Logging in via this will create a new account. The old account can be accessed via the "Standard" tab. The administrators

MeshDistributor.h 21.8 KB
Newer Older
1 2 3 4
// ============================================================================
// ==                                                                        ==
// == AMDiS - Adaptive multidimensional simulations                          ==
// ==                                                                        ==
5
// ==  http://www.amdis-fem.org                                              ==
6 7
// ==                                                                        ==
// ============================================================================
8 9 10 11 12 13 14 15 16 17 18 19
//
// Software License for AMDiS
//
// Copyright (c) 2010 Dresden University of Technology 
// All rights reserved.
// Authors: Simon Vey, Thomas Witkowski et al.
//
// This file is part of AMDiS
//
// See also license.opensource.txt in the distribution.


20

21
/** \file MeshDistributor.h */
22

23 24
#ifndef AMDIS_MESHDISTRIBUTOR_H
#define AMDIS_MESHDISTRIBUTOR_H
25 26


Thomas Witkowski's avatar
Thomas Witkowski committed
27
#include <mpi.h>
28
#include "parallel/ParallelTypes.h"
29
#include "parallel/MeshPartitioner.h"
Thomas Witkowski's avatar
Thomas Witkowski committed
30
#include "parallel/InteriorBoundary.h"
31
#include "parallel/StdMpi.h"
32
#include "AMDiS_fwd.h"
Thomas Witkowski's avatar
Thomas Witkowski committed
33
#include "Global.h"
34 35
#include "ProblemTimeInterface.h"
#include "ProblemIterationInterface.h"
36
#include "FiniteElemSpace.h"
37
#include "Serializer.h"
Thomas Witkowski's avatar
Thomas Witkowski committed
38
#include "BoundaryManager.h"
39
#include "ElementObjectData.h"
40
#include "SystemVector.h"
41

42
namespace AMDiS {
43 44

  using namespace std;
Thomas Witkowski's avatar
Thomas Witkowski committed
45 46 47 48


  struct BoundaryDofInfo
  {
49
    map<GeoIndex, DofContainerSet> geoDofs;
Thomas Witkowski's avatar
Thomas Witkowski committed
50
  };
51
  
Thomas Witkowski's avatar
Thomas Witkowski committed
52

53
  class MeshDistributor
54
  {
55
  private:
56
    MeshDistributor();
57
	          
58
    virtual ~MeshDistributor() {}
59

60
  public:
61
    void initParallelization();
62

63
    void exitParallelization();
64

65 66 67
    /// Adds a DOFVector to the set of \ref interchangeVecs. Thus, this vector 
    /// will be automatically interchanged between ranks when mesh is 
    /// repartitioned.
68 69 70 71 72
    void addInterchangeVector(DOFVector<double> *vec)
    {
      interchangeVectors.push_back(vec);
    }

73 74 75 76 77 78 79
    /// Adds all DOFVectors of a SystemVector to \ref interchangeVecs.
    void addInterchangeVector(SystemVector *vec)
    {
      for (int i = 0; i < vec->getSize(); i++)
	interchangeVectors.push_back(vec->getDOFVector(i));
    }
    
80
    /** \brief
81 82 83 84 85
     * This function checks if the mesh has changed on at least on rank. In 
     * this case, the interior boundaries are adapted on all ranks such that 
     * they fit together on all ranks. Furthermore the function 
     * \ref updateLocalGlobalNumbering() is called to update the DOF numberings 
     * and mappings on all rank due to the new mesh structure.
86
     *
87 88 89 90 91
     * \param[in]  tryRepartition   If this parameter is true, repartitioning 
     *                              may be done. This depends on several other 
     *                              parameters. If the parameter is false, the 
     *                              mesh is only checked and adapted but never 
     *                              repartitioned.
92
     */
93
    void checkMeshChange(bool tryRepartition = true);
94

95 96 97 98 99 100 101 102 103 104
    /** \brief
     * Checks if is required to repartition the mesh. If this is the case, a new
     * partition will be created and the mesh will be redistributed between the
     * ranks.
     */
    void repartitionMesh();
    
    /// Calculates the imbalancing factor and prints it to screen.
    void printImbalanceFactor();

105
    /** \brief
106 107 108 109
     * Test, if the mesh consists of macro elements only. The mesh partitioning 
     * of the parallelization works for macro meshes only and would fail, if the 
     * mesh is already refined in some way. Therefore, this function will exit
     * the program if it finds a non macro element in the mesh.
110 111
     */
    void testForMacroMesh();
112

113 114
    /// Set for each element on the partitioning level the number of 
    /// leaf elements.
115
    void setInitialElementWeights();
116

117
    inline virtual string getName() 
118 119 120
    { 
      return name; 
    }
121

Thomas Witkowski's avatar
Thomas Witkowski committed
122 123 124 125 126
    inline Mesh* getMesh()
    {
      return mesh;
    }

127 128 129 130 131
    /// Returns \ref feSpace.
    inline const FiniteElemSpace* getFeSpace()
    {
      return feSpace;
    }
132 133 134
    
    /// Returns \ref nRankDOFs, the number of DOFs in the rank mesh.
    inline int getNumberRankDofs() 
135
    {
136
      return nRankDofs;
137
    }
138

139 140 141 142 143 144
    /// Returns \ref rStartDofs, the first global DOF index owned by rank.
    inline int getStartDofs()
    {
      return rStartDofs;
    }

145
    /// Returns \ref nOverallDofs, the global number of DOFs.
146
    inline int getNumberOverallDofs()
147
    {
148
      return nOverallDofs;
149
    }
150

Thomas Witkowski's avatar
Thomas Witkowski committed
151 152 153 154 155
    inline DofMapping& getMapLocalGlobalDofs()
    {
      return mapLocalGlobalDofs;
    }

156
    /// Maps a local DOF to its global index.
157
    inline DegreeOfFreedom mapLocalToGlobal(DegreeOfFreedom dof)
158
    {
159
      return mapLocalGlobalDofs[dof];
160
    }
161

162 163
    DegreeOfFreedom mapGlobalToLocal(DegreeOfFreedom dof);

164
    /// Maps a local DOF to its local index.
165 166 167 168 169
    inline DegreeOfFreedom mapLocalToDofIndex(DegreeOfFreedom dof)
    {
      return mapLocalDofIndex[dof];
    }

Thomas Witkowski's avatar
Thomas Witkowski committed
170 171 172 173 174 175
    /// Returns the periodic mapping for all boundary DOFs in rank.
    inline PeriodicDofMap& getPeriodicMapping()
    {
      return periodicDof;
    }

176 177
    /// Returns for a global dof index its periodic mapping for a given 
    /// boundary type.
178
    inline int getPeriodicMapping(int globalDofIndex, BoundaryType type)
179
    {
Thomas Witkowski's avatar
Thomas Witkowski committed
180 181
      FUNCNAME("MeshDistributor::getPeriodicMapping()");

182
      TEST_EXIT_DBG(periodicDof[type].count(globalDofIndex) == 1)
Thomas Witkowski's avatar
Thomas Witkowski committed
183 184
	("There is no periodic association for global DOF %d for boundary type %d!\n",
	 globalDofIndex, type);
185 186 187 188

      return periodicDof[type][globalDofIndex];
    }

189
    /// For a given global DOF index, this function returns the set of periodic
190 191
    /// associations, i.e., the boundary types the DOF is associated to, for 
    /// this DOF.
192
    inline std::set<BoundaryType>& getPerDofAssociations(int globalDofIndex)
193
    {      
194 195 196
      TEST_EXIT_DBG(periodicDofAssociations.count(globalDofIndex)) 
 	("Should not happen!\n"); 

197
      return periodicDofAssociations[globalDofIndex];
198
    }
199

200
    /// Returns true, if the DOF (global index) is a periodic DOF.
201
    inline bool isPeriodicDof(int globalDofIndex)
202
    {
203 204
      return (periodicDofAssociations.count(globalDofIndex) > 0 &&
	       periodicDofAssociations[globalDofIndex].size() > 0);
205 206
    }

207 208 209
    /// Returns true, if the DOF (global index) is a periodic DOF for the given
    /// boundary type.
    inline bool isPeriodicDof(int globalDofIndex, BoundaryType type)
210 211
    {
      return (periodicDof[type].count(globalDofIndex) > 0);
212 213
    }

214 215
    /// Return true, if the given DOF is owned by the rank. If false, the DOF
    /// is in rank's partition, but is owned by some other rank.
216 217
    inline bool getIsRankDof(DegreeOfFreedom dof)
    {
218 219 220 221
      if (isRankDof.count(dof))
	return isRankDof[dof];

      return false;
222
    }
223

224 225 226 227 228
    inline DofIndexToBool& getIsRankDof()
    {
      return isRankDof;
    }

229
    inline long getLastMeshChangeIndex()
230
    {
231
      return lastMeshChangeIndex;
232
    }
233

234
    inline int getMpiRank()
235
    {
236
      return mpiRank;
237
    }
238

Thomas Witkowski's avatar
Thomas Witkowski committed
239 240 241 242 243
    inline int getMpiSize()
    {
      return mpiSize;
    }

244 245 246
    inline MPI::Intracomm& getMpiComm()
    {
      return mpiComm;
247 248
    }

249
    inline RankToDofContainer& getSendDofs()
250
    {
251
      return sendDofs;
252 253
    }

254
    inline RankToDofContainer& getRecvDofs()
255
    {
256
      return recvDofs;
257
    }
258

259 260 261 262
    /// Creates a set of all DOFs that are on interior boundaries of rank's
    /// domain. Thus, it creates the union of \ref sendDofs and \ref recvDofs.
    void createBoundaryDofs(std::set<DegreeOfFreedom> &boundaryDofs);

263
    // Writes all data of this object to an output stream.
264
    void serialize(ostream &out);
265

266
    // Reads the object data from an input stream.
267
    void deserialize(istream &in);
268 269

    /** \brief
270 271 272 273
     * This function must be used if the values of a DOFVector must be 
     * synchronised over all ranks. That means, that each rank sends the 
     * values of the DOFs, which are owned by the rank and lie on an interior 
     * bounday, to all other ranks also having these DOFs.
274
     *
275 276 277
     * This function must be used, for example, after the lineary system is 
     * solved, or after the DOFVector is set by some user defined functions, 
     * e.g., initial solution functions.
278
     */    
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307
    template<typename T>
    void synchVector(DOFVector<T> &vec) 
    {
      StdMpi<vector<T> > stdMpi(mpiComm);

      for (RankToDofContainer::iterator sendIt = sendDofs.begin();
	   sendIt != sendDofs.end(); ++sendIt) {
	vector<T> dofs;
	int nSendDofs = sendIt->second.size();
	dofs.reserve(nSendDofs);
	
	for (int i = 0; i < nSendDofs; i++)
	  dofs.push_back(vec[*((sendIt->second)[i])]);
	
	stdMpi.send(sendIt->first, dofs);
      }
      
      for (RankToDofContainer::iterator recvIt = recvDofs.begin();
	   recvIt != recvDofs.end(); ++recvIt)
	stdMpi.recv(recvIt->first, recvIt->second.size());
      
      stdMpi.startCommunication();
      
      for (RankToDofContainer::iterator recvIt = recvDofs.begin();
	   recvIt != recvDofs.end(); ++recvIt)
	for (unsigned int i = 0; i < recvIt->second.size(); i++)
	  vec[*(recvIt->second)[i]] = stdMpi.getRecvData(recvIt->first)[i];      
    }
    
308
    /** \brief
309 310 311
     * Works in the same way as the function above defined for DOFVectors. Due
     * to performance, this function does not call \ref synchVector for each 
     * DOFVector, but instead sends all values of all DOFVectors all at once.
312 313 314
     */
    void synchVector(SystemVector &vec);

315 316
    void check3dValidMesh();

Thomas Witkowski's avatar
Thomas Witkowski committed
317 318 319 320 321
    void setBoundaryDofRequirement(Flag flag)
    {
      createBoundaryDofFlag = flag;
    }

322 323 324 325 326
    BoundaryDofInfo& getBoundaryDofInfo()
    {
      return boundaryDofInfo;
    }

327 328
    void getAllBoundaryDofs(DofContainer& dofs);

329 330 331 332 333 334

  public:
    /// Adds a stationary problem to the global mesh distributor objects.
    static void addProblemStatGlobal(ProblemStatSeq *probStat);

    
335
  protected:
336 337
    void addProblemStat(ProblemStatSeq *probStat);

338 339
    /// Determines the interior boundaries, i.e. boundaries between ranks, and
    /// stores all information about them in \ref interiorBoundary.
340
    void createInteriorBoundaryInfo();
341

Thomas Witkowski's avatar
Thomas Witkowski committed
342 343 344 345 346
    void updateInteriorBoundaryInfo();

    void createMeshElementData();

    void createBoundaryData();
Thomas Witkowski's avatar
Thomas Witkowski committed
347

Thomas Witkowski's avatar
Thomas Witkowski committed
348 349
    void createBoundaryDofs();

350 351
    /// Removes all macro elements from the mesh that are not part of ranks 
    /// partition.
352 353
    void removeMacroElements();

354 355
    /// Updates the local and global DOF numbering after the mesh has been 
    /// changed.
356
    void updateLocalGlobalNumbering();
357

358
    /** \brief
359 360 361
     * Creates to all dofs in rank's partition that are on a periodic boundary
     * the mapping from dof index to the other periodic dof indices. This 
     * information is stored in \ref periodicDof.
362
     */
363 364
    void createPeriodicMap();

365 366 367 368 369 370 371 372
    /** \brief
     * This function is called only once during the initialization when the
     * whole macro mesh is available on all cores. It copies the pointers of all
     * macro elements to \ref allMacroElements and stores all neighbour 
     * information based on macro element indices (and not pointer based) in 
     * \ref macroElementNeighbours. These information are then used to 
     * reconstruct macro elements during mesh redistribution.
     */
373 374
    void createMacroElementInfo();

375 376
    void updateMacroElementInfo();

377
    /** \brief
378 379 380 381 382 383
     * Checks for all given interior boundaries if the elements fit together on
     * both sides of the boundaries. If this is not the case, the mesh is 
     * adapted. Because refinement of a certain element may forces the 
     * refinement of other elements, it is not guaranteed that all rank's meshes
     * fit together after this function terminates. Hence, it must be called 
     * until a stable mesh refinement is reached.
384
     *
385 386
     * \param[in] allBound   Defines a map from rank to interior boundaries 
     *                       which should be checked.
387
     *
388 389 390
     * \return    If the mesh has  been changed by this function, it returns 
     *            true. Otherwise, it returns false, i.e., the given interior 
     *            boundaries fit together on both sides.
391 392
     */
    bool checkAndAdaptBoundary(RankToBoundMap &allBound);
393
  
394 395
    /// Sets \ref isRankDof to all matrices and rhs vectors in a given 
    /// stationary problem.
396
    void setRankDofs(ProblemStatSeq *probStat);
397

398 399
    /// Sets \ref isRankDof to all matrices and rhs vectors in all 
    /// stationary problems.
400 401
    void setRankDofs();

402 403 404 405
    /// Removes all periodic boundary condition information from all matrices and
    /// vectors of all stationary problems and from the mesh itself.
    void removePeriodicBoundaryConditions();

Thomas Witkowski's avatar
Thomas Witkowski committed
406
    // Removes all periodic boundaries from a given boundary map.
407
    void removePeriodicBoundaryConditions(BoundaryIndexMap& boundaryMap);
Thomas Witkowski's avatar
Thomas Witkowski committed
408

409
    /// Writes a vector of dof pointers to an output stream.
410
    void serialize(ostream &out, DofContainer &data);
411 412

    /// Reads a vector of dof pointers from an input stream.
413 414
    void deserialize(istream &in, DofContainer &data,
		     map<int, const DegreeOfFreedom*> &dofMap);
415 416

    /// Writes a \ref RankToDofContainer to an output stream.
417
    void serialize(ostream &out, RankToDofContainer &data);
418 419

    /// Reads a \ref RankToDofContainer from an input stream.
420 421
    void deserialize(istream &in, RankToDofContainer &data,
		     map<int, const DegreeOfFreedom*> &dofMap);
422

423
    /// Writes a periodic dof mapping to an output stream.
424
    void serialize(ostream &out, PeriodicDofMap &data);
425

426
    void serialize(ostream &out, map<int, std::set<int> >& data);
427

428
    /// Reads a periodic dof mapping from an input stream.
429
    void deserialize(istream &in, PeriodicDofMap &data);
430

431
    void deserialize(istream &in, map<int, std::set<int> >& data);
432

433 434
    /// Writes a mapping from dof pointers to some values to an output stream.
    template<typename T>
435
    void serialize(ostream &out, map<const DegreeOfFreedom*, T> &data)
436
    {
437 438
      FUNCNAME("ParallelDomainBase::serialize()");

439
      int mapSize = data.size();
440
      SerUtil::serialize(out, mapSize);
441
      for (typename map<const DegreeOfFreedom*, T>::iterator it = data.begin();
442 443 444
	   it != data.end(); ++it) {
	int v1 = (*(it->first));
	T v2 = it->second;
445 446
	SerUtil::serialize(out, v1);
	SerUtil::serialize(out, v2);
447 448 449 450 451
      }
    }

    /// Reads a mapping from dof pointer to some values from an input stream.
    template<typename T>
452 453
    void deserialize(istream &in, map<const DegreeOfFreedom*, T> &data,
		     map<int, const DegreeOfFreedom*> &dofMap)
454
    {
455 456
      FUNCNAME("ParallelDomainBase::deserialize()");

457
      int mapSize = 0;
458
      SerUtil::deserialize(in, mapSize);
459 460 461
      for (int i = 0; i < mapSize; i++) {
	int v1 = 0;
	T v2;
462 463
	SerUtil::deserialize(in, v1);
	SerUtil::deserialize(in, v2);
464 465 466

	TEST_EXIT_DBG(dofMap.count(v1) != 0)("Cannot find DOF %d in map!\n", v1);

467 468 469
	data[dofMap[v1]] = v2;
      }
    }
470

471
  protected:
472 473
    /// List of all stationary problems that are managed by this mesh 
    /// distributor.
474
    vector<ProblemStatSeq*> problemStat;
Thomas Witkowski's avatar
Thomas Witkowski committed
475

476 477 478
    /// If true, the mesh distributor is already initialized;
    bool initialized;

479 480 481 482 483 484
    /// The rank of the current process.
    int mpiRank;

    /// Overall number of processes.
    int mpiSize;

485 486
    /// MPI communicator collected all processes, which should be used for
    /// calculation. The Debug procces is not included in this communicator.
487 488 489
    MPI::Intracomm mpiComm;

    /// Name of the problem (as used in the init files)
490
    string name;
491

492 493 494
    /// Finite element space of the problem.
    FiniteElemSpace *feSpace;

495 496 497
    /// Mesh of the problem.
    Mesh *mesh;

498
    /** \brief
499 500 501
     * A refinement manager that should be used on the mesh. It is used to 
     * refine elements at interior boundaries in order to fit together with 
     * elements on the other side of the interior boundary.
502 503 504
     */    
    RefinementManager *refineManager;

505 506 507
    /// Info level.
    int info;

508 509
    /// Pointer to a mesh partitioner that is used to partition the mesh to 
    /// the ranks.
510
    MeshPartitioner *partitioner;
511

512 513
    /// Weights for the elements, i.e., the number of leaf elements within 
    /// this element.
514
    map<int, double> elemWeights;
515 516

    /** \brief
517 518
     * Stores to every macro element index the number of the rank that owns this
     * macro element.
519
     */
520
    map<int, int> partitionMap;
521

522
    /// Number of DOFs in the rank mesh.
523
    int nRankDofs;
Thomas Witkowski's avatar
Thomas Witkowski committed
524

525 526 527
    /// Is the index of the first global DOF index, which is owned by the rank.
    int rStartDofs;

528
    /// Number of DOFs in the whole domain.
529 530
    int nOverallDofs;

531 532
    /// Data structure to store all sub-objects of all elements of the 
    /// macro mesh.
Thomas Witkowski's avatar
Thomas Witkowski committed
533 534
    ElementObjects elObjects;

535
    /// Maps to each macro element index a pointer to the corresponding element.
536
    map<int, Element*> macroElIndexMap;
Thomas Witkowski's avatar
Thomas Witkowski committed
537
    
538
    /// Maps to each macro element index the type of this element.
539
    map<int, int> macroElIndexTypeMap;
Thomas Witkowski's avatar
Thomas Witkowski committed
540

Thomas Witkowski's avatar
Thomas Witkowski committed
541
    /** \brief 
542 543 544 545
     * Defines the interior boundaries of the domain that result from 
     * partitioning the whole mesh. Contains only the boundaries, which are 
     * owned by the rank, i.e., the object gives for every neighbour rank i 
     * the boundaries this rank owns and shares with rank i.
Thomas Witkowski's avatar
Thomas Witkowski committed
546 547 548 549
     */
    InteriorBoundary myIntBoundary;
    
    /** \brief
550 551 552 553
     * Defines the interior boundaries of the domain that result from 
     * partitioning the whole mesh. Contains only the boundaries, which are 
     * not owned by the rank, i.e., the object gives for every neighbour rank 
     * i the boundaries that are owned by rank i and are shared with this rank.
Thomas Witkowski's avatar
Thomas Witkowski committed
554
     */
Thomas Witkowski's avatar
Thomas Witkowski committed
555
    InteriorBoundary otherIntBoundary;
Thomas Witkowski's avatar
Thomas Witkowski committed
556

557
    /** \brief
558 559
     * Defines the periodic boundaries with other ranks. Periodic boundaries
     * have no owner, as it is the case of interior boundaries.
560 561 562
     */
    InteriorBoundary periodicBoundary;

563
    /** \brief
564 565
     * This map contains for each rank the list of DOFs the current rank must 
     * send to exchange solution DOFs at the interior boundaries.
566
     */
Thomas Witkowski's avatar
Thomas Witkowski committed
567
    RankToDofContainer sendDofs;
568 569

    /** \brief
570 571 572
     * This map contains on each rank the list of DOFs from which the current 
     * rank will receive DOF values (i.e., this are all DOFs at an interior 
     * boundary). The DOF indices are given in rank's local numbering.
573
     */
Thomas Witkowski's avatar
Thomas Witkowski committed
574
    RankToDofContainer recvDofs;
575 576

    /// Maps local to global dof indices.
577
    DofMapping mapLocalGlobalDofs;
578

Thomas Witkowski's avatar
Thomas Witkowski committed
579
    /// Maps local dof indices to real dof indices.
580
    DofMapping mapLocalDofIndex;  
581 582

    /** \brief
583 584 585
     * Maps all DOFs in ranks partition to a bool value. If it is true, the DOF 
     * is owned by the rank. Otherwise, its an interior boundary DOF that is 
     * owned by another rank.
586
     */
587 588
    DofIndexToBool isRankDof;

589
    /** \brief
590 591 592 593
     * If periodic boundaries are used, this map stores, for each periodic 
     * boundary type, for all DOFs in rank's partition (that are on periodic 
     * boundaries), the corresponding mapped periodic DOFs. The mapping is 
     * defined by using global DOF indices.
594
     */
595
    PeriodicDofMap periodicDof;
596 597
    
    /** \brief
598 599 600 601 602
     * If periodic boundaries are used, this map stores to each periodic DOF in 
     * rank's partition the set of periodic boundaries the DOF is associated to.
     * In 2D, most DOFs are only on one periodic boundary. Only, e.g., in a box 
     * with all boundaries being periodic, the four corners are associated by 
     * two different boundaries.
603
     */
604
    map<int, std::set<BoundaryType> > periodicDofAssociations;
605

606 607 608 609 610
    
    /// This set of values must be interchanged between ranks when the mesh is 
    /// repartitioned.
    vector<DOFVector<double>*> interchangeVectors;
		        
611 612 613
    /** \brief
     * If the problem definition has been read from a serialization file, this 
     * variable is true, otherwise it is false. This variable is used to stop the
614 615
     * initialization function, if the problem definition has already been read
     * from a serialization file.
616 617
     */
    bool deserialized;
618

619 620 621
    /// Denotes whether there exists a filewriter for this object.
    bool writeSerializationFile;

622 623 624
    /// If true, it is possible to repartition the mesh during computations.
    bool repartitioningAllowed;

625 626
    /// Stores the number of mesh changes that must lie in between to 
    /// repartitionings.
627 628
    int repartitionIthChange;

629 630
    /// Counts the number of mesh changes after the last mesh repartitioning 
    /// was done.
631
    int nMeshChangesAfterLastRepartitioning;
632

633 634 635
    /// Countes the number of mesh repartitions that were done. Till now, this 
    /// variable is used only for debug outputs.
    int repartitioningCounter;
636

637
    /// Directory name where all debug output files should be written to.
638
    string debugOutputDir;
639

640
    /** \brief
641 642
     * Stores the mesh change index. This is used to recognize changes in the
     * mesh structure (e.g. through refinement or coarsening managers).
643 644
     */
    long lastMeshChangeIndex;
645

646 647 648 649
    /// Stores for all macro elements of the original macro mesh the
    /// neighbourhood information based on element indices. Thus, each macro
    /// element index is mapped to a vector containing all indices of 
    /// neighbouring macro elements.
650
    map<int, vector<int> > macroElementNeighbours;
651

652 653
    /// Store all macro elements of the overall mesh, i.e., before the
    /// mesh is redistributed for the first time.
654
    vector<MacroElement*> allMacroElements;
655

Thomas Witkowski's avatar
Thomas Witkowski committed
656 657 658
    Flag createBoundaryDofFlag;

    BoundaryDofInfo boundaryDofInfo;
659

Thomas Witkowski's avatar
Thomas Witkowski committed
660
  public:
661 662 663
    /// The boundary DOFs are sorted by subobject entities, i.e., first all
    /// face DOFs, edge DOFs and to the last vertex DOFs will be set to
    /// communication structure vectors, \ref sendDofs and \ref recvDofs.
Thomas Witkowski's avatar
Thomas Witkowski committed
664 665
    static const Flag BOUNDARY_SUBOBJ_SORTED;

666 667 668 669 670 671 672 673 674
    /// When boundary DOFs are created, \ref boundaryDofInfo is filled for
    /// all DOFs that this rank will send to other ranks (thus, rank 
    /// owned DOFs.
    static const Flag BOUNDARY_FILL_INFO_SEND_DOFS;

    /// When boundary DOFs are created, \ref boundaryDofInfo is filled for
    /// all DOFs that this rank will receive from other ranks (thus, DOFs
    /// that are owned by another rank).
    static const Flag BOUNDARY_FILL_INFO_RECV_DOFS;
Thomas Witkowski's avatar
Thomas Witkowski committed
675

676 677
    static MeshDistributor *globalMeshDistributor;

678
    friend class ParallelDebug;
679 680 681
  };
}

682
#endif // AMDIS_MESHDISTRIBUTOR_H