ParallelDofMapping.cc 10.7 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
//
// 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.


13
#include "parallel/ParallelDofMapping.h"
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
14
#include "parallel/StdMpi.h"
15
16
17
18
19

namespace AMDiS {

  using namespace std;

20
  void FeSpaceDofMap::clear()
21
  {
22
    int nLevel = levelData->getLevelNumber();
23
    dofMap.clear();
24
25
    dofMap.resize(nLevel);

26
    nonRankDofs.clear();
27
28
29
30
31
32
33
34
    nonRankDofs.resize(nLevel);

    for (int i = 0; i < nLevel; i++) {
      nRankDofs[i] = 0;
      nLocalDofs[i] = 0;
      nOverallDofs[i] = 0;
      rStartDofs[i] = 0;
    }
35
36
37
  }


38
  void FeSpaceDofMap::update()
39
  {
40
    FUNCNAME("FeSpaceDofMap::update()");
41

42
    int nLevel = levelData->getLevelNumber();
43
    for (int i = 0; i < nLevel; i++) {
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
44

45
      // === Compute local indices for all rank owned DOFs. ===
46
      
47
48
49
50
51
52
53
54
      for (DofMap::iterator it = dofMap[i].begin(); it != dofMap[i].end(); ++it)
	if (it->second.local == -1 && nonRankDofs[i].count(it->first) == 0)
	  it->second.local = nRankDofs[i]++;
      
      // === Compute number of local and global DOFs in the mapping. ===
      
      nOverallDofs[i] = 0;
      rStartDofs[i] = 0;
55
      mpi::getDofNumbering(levelData->getMpiComm(0), 
56
			   nRankDofs[i], rStartDofs[i], nOverallDofs[i]);
57
58
59
60
61
62
63
64
65
      
      // === If required, compute also the global indices. ===
      
      if (needGlobalMapping) {
	computeGlobalMapping(i);
	
	if (hasNonLocalDofs)
	  computeNonLocalIndices(i);
      }
66
    }
67
68
69
  }


70
  void FeSpaceDofMap::computeGlobalMapping(int level)
71
  {
72
73
74
75
76
    FUNCNAME("FeSpaceDofMap::computeGlobalMapping()");

    for (DofMap::iterator it = dofMap[level].begin(); 
	 it != dofMap[level].end(); ++it)
      it->second.global = it->second.local + rStartDofs[level];
77
78
  }

79

80
  void FeSpaceDofMap::computeNonLocalIndices(int level)
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
81
  {
82
    FUNCNAME("FeSpaceDofMap::computeNonLocalIndices()");
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
83
84
85

    typedef map<int, map<const FiniteElemSpace*, DofContainer> >::iterator it_type;

86
87
88
    // === Send all global indices of DOFs that are owned by the rank to all ===
    // === other ranks that also include this DOF.                           ===

89
    StdMpi<vector<int> > stdMpi(levelData->getMpiComm(0));
90

91
92
    for (DofComm::Iterator it(*sendDofs, level, feSpace); 
	 !it.end(); it.nextRank())
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
93
      for (; !it.endDofIter(); it.nextDof())
94
95
	if (dofMap[level].count(it.getDofIndex()) && !nonRankDofs[level].count(it.getDofIndex()))
	  stdMpi.getSendData(it.getRank()).push_back(dofMap[level][it.getDofIndex()].global);
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
96
97
98

    stdMpi.updateSendDataSize();

99
100
101

    // === Check from which ranks this rank must receive some data. ===

102
103
    for (DofComm::Iterator it(*recvDofs, level, feSpace); 
	 !it.end(); it.nextRank()) {
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
104
105
      bool recvFromRank = false;
      for (; !it.endDofIter(); it.nextDof()) {
106
	if (nonRankDofs[level].count(it.getDofIndex())) {
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
107
108
109
110
111
	  recvFromRank = true;
	  break;
	}
      }

112
      if (recvFromRank)
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
113
114
115
	stdMpi.recv(it.getRank());
    }

116
117
118

    // === Start communication to exchange global indices. ===

Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
119
120
    stdMpi.startCommunication();

121
122
123

    // === And set the global indices for all DOFs that are not owned by rank. ===
    
124
    for (DofComm::Iterator it(*recvDofs, level, feSpace);
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
125
126
127
	 !it.end(); it.nextRank()) {
      int i = 0;
      for (; !it.endDofIter(); it.nextDof())
128
129
	if (nonRankDofs[level].count(it.getDofIndex()))
	  dofMap[level][it.getDofIndex()].global = stdMpi.getRecvData(it.getRank())[i++];
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
130
131
132
133
    }
  }


134
  void ParallelDofMapping::init(MeshLevelData &ldata,
135
				vector<const FiniteElemSpace*> &fe,
136
				vector<const FiniteElemSpace*> &uniqueFe,
137
138
				bool needGlobalMapping,
				bool bNonLocalDofs)
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
139
  {
140
141
    FUNCNAME("ParallelDofMapping::init()");

142
    levelData = &ldata;
143
    feSpaces = fe;
144
    feSpacesUnique = uniqueFe;
145
    hasNonLocalDofs = bNonLocalDofs;
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
146
    
147
148
149

    // === Init the mapping for all different FE spaces. ===

150
    for (vector<const FiniteElemSpace*>::iterator it = feSpacesUnique.begin();
151
152
153
154
155
	 it != feSpacesUnique.end(); ++it) {
      addFeSpace(*it);
      data[*it].setNeedGlobalMapping(needGlobalMapping);
      data[*it].setNonLocalDofs(hasNonLocalDofs);
    }
Thomas Witkowski's avatar
FETI-DP  
Thomas Witkowski committed
156
  }
Thomas Witkowski's avatar
Thomas Witkowski committed
157
158


159
160
161
162
  void ParallelDofMapping::clear()
  {
    FUNCNAME("ParallelDofMapping::clear()");

163
164
    TEST_EXIT_DBG(levelData)("No mesh level data object defined!\n");

165
    for (vector<const FiniteElemSpace*>::iterator it = feSpacesUnique.begin();
166
167
168
	 it != feSpacesUnique.end(); ++it)
      data[*it].clear();

169
170
171
172
173
    int nLevel = levelData->getLevelNumber();
    nRankDofs.resize(nLevel);
    nLocalDofs.resize(nLevel);
    nOverallDofs.resize(nLevel);
    rStartDofs.resize(nLevel);
174
    dofToMatIndex.resize(nLevel);
175

176
177
178
179
180
    for (int i = 0; i < nLevel; i++) {
      nRankDofs[i] = -1;
      nLocalDofs[i] = -1;
      nOverallDofs[i] = -1;
      rStartDofs[i] = -1;
181
      dofToMatIndex[i].clear();
182
    }
183
184
185
  }


186
187
188
189
190
191
192
193
  void ParallelDofMapping::setDofComm(DofComm &pSend, DofComm &pRecv)
  {
    FUNCNAME("ParallelDofMapping::setDofComm()");

    sendDofs = &pSend;
    recvDofs = &pRecv;

    // Add the DOF communicator also to all FE space DOF mappings.
194
    for (vector<const FiniteElemSpace*>::iterator it = feSpacesUnique.begin();
195
196
197
	 it != feSpacesUnique.end(); ++it)
      data[*it].setDofComm(pSend, pRecv);
  }
198

199

Thomas Witkowski's avatar
Thomas Witkowski committed
200
201
202
203
204
205
206
  void ParallelDofMapping::addFeSpace(const FiniteElemSpace* feSpace)
  {
    FUNCNAME("ParallelDofMapping::addFeSpace()");
    
    if (data.count(feSpace))
      data.find(feSpace)->second.clear();
    else
207
      data.insert(make_pair(feSpace, FeSpaceDofMap(levelData)));
Thomas Witkowski's avatar
Thomas Witkowski committed
208
209
210
211
212
    
    data.find(feSpace)->second.setFeSpace(feSpace);
  }    


213
  int ParallelDofMapping::computeRankDofs(int level)
Thomas Witkowski's avatar
Thomas Witkowski committed
214
  {
215
    FUNCNAME("ParallelDofMapping::computeRankDofs()");
Thomas Witkowski's avatar
Thomas Witkowski committed
216
217
    
    int result = 0;
218
219
    for (unsigned int i = 0; i < feSpaces.size(); i++) {
      TEST_EXIT_DBG(data.count(feSpaces[i]))("Should not happen!\n");
220
      result += data[feSpaces[i]].nRankDofs[level];
Thomas Witkowski's avatar
Thomas Witkowski committed
221
222
223
224
225
226
    }
    
    return result;
  }


227
  int ParallelDofMapping::computeLocalDofs(int level)
Thomas Witkowski's avatar
Thomas Witkowski committed
228
  {
229
    FUNCNAME("ParallelDofMapping::computeLocalDofs()");
Thomas Witkowski's avatar
Thomas Witkowski committed
230
231
    
    int result = 0;
232
233
    for (unsigned int i = 0; i < feSpaces.size(); i++) {
      TEST_EXIT_DBG(data.count(feSpaces[i]))("Should not happen!\n");
234
      result += data[feSpaces[i]].nLocalDofs[level];
Thomas Witkowski's avatar
Thomas Witkowski committed
235
236
237
238
239
240
    }
    
    return result;
  }


241
  int ParallelDofMapping::computeOverallDofs(int level)
Thomas Witkowski's avatar
Thomas Witkowski committed
242
  {
243
    FUNCNAME("ParallelDofMapping::computeOverallDofs()");
Thomas Witkowski's avatar
Thomas Witkowski committed
244
245
246
247

    int result = 0;
    for (unsigned int i = 0; i < feSpaces.size(); i++) {
      TEST_EXIT_DBG(data.count(feSpaces[i]))("Should not happen!\n");
248
      result += data.find(feSpaces[i])->second.nOverallDofs[level];
Thomas Witkowski's avatar
Thomas Witkowski committed
249
250
251
252
253
254
    }
    
    return result;
  }


255
  int ParallelDofMapping::computeStartDofs(int level)
Thomas Witkowski's avatar
Thomas Witkowski committed
256
  {
257
    FUNCNAME("ParallelDofMapping::computeStartDofs()");
Thomas Witkowski's avatar
Thomas Witkowski committed
258
259
260
261

    int result = 0;
    for (unsigned int i = 0; i < feSpaces.size(); i++) {
      TEST_EXIT_DBG(data.count(feSpaces[i]))("Should not happen!\n");
262
      result += data.find(feSpaces[i])->second.rStartDofs[level];
Thomas Witkowski's avatar
Thomas Witkowski committed
263
264
265
266
267
268
269
270
271
272
    }
    
    return result;
  }


  void ParallelDofMapping::update()
  {
    FUNCNAME("ParallelDofMapping::update()");

273
    // First, update all FE space DOF mappings.
274
    for (vector<const FiniteElemSpace*>::iterator it = feSpacesUnique.begin();
Thomas Witkowski's avatar
Thomas Witkowski committed
275
276
277
	 it != feSpacesUnique.end(); ++it)
      data[*it].update();
    
278
    int nLevel = levelData->getLevelNumber();
279
280
281
282
283
284
285
286
287
288
289
290
    for (int i = 0; i < nLevel; i++) {
      // Compute all numbers from this mappings.

      nRankDofs[i] = computeRankDofs(i);
      nLocalDofs[i] = computeLocalDofs(i);
      nOverallDofs[i] = computeOverallDofs(i);
      rStartDofs[i] = computeStartDofs(i);
      
      // And finally, compute the matrix indices.
      if (needMatIndex)
	computeMatIndex(needMatIndexFromGlobal, i);
    }
Thomas Witkowski's avatar
Thomas Witkowski committed
291
292
  }
  
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307

  void ParallelDofMapping::update(vector<const FiniteElemSpace*>& fe)
  {
    FUNCNAME("ParallelDofMapping::update()");

    for (vector<const FiniteElemSpace*>::iterator it = fe.begin();
	 it != fe.end(); ++it)
      if (find(feSpacesUnique.begin(), feSpacesUnique.end(), *it) == 
	  feSpacesUnique.end())
	ERROR_EXIT("Wrong FE space!\n");

    feSpaces = fe;
    update();
  }

Thomas Witkowski's avatar
Thomas Witkowski committed
308
  
309
  void ParallelDofMapping::computeMatIndex(bool globalIndex, int level)
Thomas Witkowski's avatar
Thomas Witkowski committed
310
311
  {
    FUNCNAME("ParallelDofMapping::computeMatIndex()");
312

313
    dofToMatIndex[level].clear();
Thomas Witkowski's avatar
Thomas Witkowski committed
314
    
315
316
317
    // The offset is always added to the local matrix index. The offset for the
    // DOFs in the first FE spaces is the smalled global index of a DOF that is
    // owned by the rank.
318
    int offset = rStartDofs[level];
Thomas Witkowski's avatar
Thomas Witkowski committed
319
    
320
321
322

    // === Create the matrix indices for all component FE spaces. ===

Thomas Witkowski's avatar
Thomas Witkowski committed
323
    for (unsigned int i = 0; i < feSpaces.size(); i++) {
324
325
326

      // Traverse all DOFs of the FE space and create for all rank owned DOFs
      // a matrix index.
327
      DofMap& dofMap = data[feSpaces[i]].getMap(level);
328
      for (DofMap::iterator it = dofMap.begin(); it != dofMap.end(); ++it) {
329
	if (data[feSpaces[i]].isRankDof(it->first, level)) {
Thomas Witkowski's avatar
Thomas Witkowski committed
330
	  int globalMatIndex = it->second.local + offset;
331
	  if (globalIndex)
332
	    dofToMatIndex[level].add(i, it->second.global, globalMatIndex);
333
	  else
334
	    dofToMatIndex[level].add(i, it->first, globalMatIndex);
Thomas Witkowski's avatar
Thomas Witkowski committed
335
336
337
	}
      }
      
338
339
      // Increase the offset for the next FE space by the number of DOFs owned 
      // by the rank in the current FE space.
340
      offset += data[feSpaces[i]].nRankDofs[level];
Thomas Witkowski's avatar
Thomas Witkowski committed
341
	
342
      // If there are no non local DOFs, continue with the next FE space.
Thomas Witkowski's avatar
Thomas Witkowski committed
343
344
345
346
347
348
      if (!hasNonLocalDofs)
	continue;
      
      TEST_EXIT_DBG(sendDofs != NULL && recvDofs != NULL)
	("No communicator given!\n");
      
349
350
351
      // === Communicate the matrix indices for all DOFs that are on some ===
      // === interior boundaries.                                         ===

352
      StdMpi<vector<DegreeOfFreedom> > stdMpi(levelData->getMpiComm(0));
353
      for (DofComm::Iterator it(*sendDofs, level, feSpaces[i]); 
Thomas Witkowski's avatar
Thomas Witkowski committed
354
355
356
357
358
	   !it.end(); it.nextRank()) {
	vector<DegreeOfFreedom> sendGlobalDofs;
	
	for (; !it.endDofIter(); it.nextDof())
	  if (dofMap.count(it.getDofIndex()))
359
	    if (globalIndex)
360
	      sendGlobalDofs.push_back(dofToMatIndex[level].get(i, dofMap[it.getDofIndex()].global));
361
	    else
362
	      sendGlobalDofs.push_back(dofToMatIndex[level].get(i, it.getDofIndex()));
Thomas Witkowski's avatar
Thomas Witkowski committed
363
364
365
366
	
	stdMpi.send(it.getRank(), sendGlobalDofs);
      }
      
367
      for (DofComm::Iterator it(*recvDofs, level, feSpaces[i]); 
Thomas Witkowski's avatar
Thomas Witkowski committed
368
369
370
371
372
373
	   !it.end(); it.nextRank())
	stdMpi.recv(it.getRank());
      
      stdMpi.startCommunication();
      
      {
374
	for (DofComm::Iterator it(*recvDofs, level, feSpaces[i]); 
Thomas Witkowski's avatar
Thomas Witkowski committed
375
376
377
378
379
	     !it.end(); it.nextRank()) {
	  int counter = 0;
	  for (; !it.endDofIter(); it.nextDof()) {
	    if (dofMap.count(it.getDofIndex())) {
	      DegreeOfFreedom d = stdMpi.getRecvData(it.getRank())[counter++];
380
	      if (globalIndex)
381
		dofToMatIndex[level].add(i, dofMap[it.getDofIndex()].global, d);
382
	      else
383
		dofToMatIndex[level].add(i, it.getDofIndex(), d);
Thomas Witkowski's avatar
Thomas Witkowski committed
384
385
386
387
388
389
390
	    }
	  }
	}
      }
    }
  }
  
391
}