PetscSolver.cc 5.76 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 "AMDiS.h"
Thomas Witkowski's avatar
Thomas Witkowski committed
14
#include "parallel/PetscSolver.h"
15
#include "parallel/StdMpi.h"
16
#include "parallel/MpiHelper.h"
Thomas Witkowski's avatar
Thomas Witkowski committed
17
#include "parallel/ParallelDofMapping.h"
18

19
20
namespace AMDiS {

Thomas Witkowski's avatar
Thomas Witkowski committed
21
22
  using namespace std;

23
  PetscSolver::PetscSolver(string name)
24
    : ParallelCoarseSpaceSolver(name),
25
26
      dofMap(FESPACE_WISE, true),
      dofMapSd(FESPACE_WISE, true),
Thomas Witkowski's avatar
Thomas Witkowski committed
27
      parallelDofMappingsRegistered(false),
28
      kspPrefix(""),
29
30
      removeRhsNullspace(false),    
      hasConstantNullspace(false),
31
      isSymmetric(false),
32
      handleDirichletRows(true)
33
  {
34
35
    setDofMapping(&dofMap);

36
37
38
39
    string kspStr = "";
    Parameters::get("parallel->solver->petsc->ksp", kspStr);
    if (kspStr != "")
      PetscOptionsInsertString(kspStr.c_str());
40

Thomas Witkowski's avatar
Thomas Witkowski committed
41
42
    Parameters::get("parallel->remove rhs null space", removeRhsNullspace);
    Parameters::get("parallel->has constant null space", hasConstantNullspace);
43
44
    Parameters::get("parallel->nullspace->const in comp", 
		    constNullspaceComponent);
45
46
47
  }


Thomas Witkowski's avatar
Thomas Witkowski committed
48
49
50
51
  PetscSolver::~PetscSolver()
  {
    if (parallelDofMappingsRegistered) {
      int nLevels = meshDistributor->getMeshLevelData().getLevelNumber();
52
53

      meshDistributor->removeDofMap(dofMap);
Thomas Witkowski's avatar
Thomas Witkowski committed
54
55
56
57
58
59
      if (nLevels > 1)
	meshDistributor->removeDofMap(dofMapSd);
    }
  }


60
  void PetscSolver::init(vector<const FiniteElemSpace*> &fe0,
Thomas Witkowski's avatar
bo eh  
Thomas Witkowski committed
61
62
			 vector<const FiniteElemSpace*> &fe1,
			 bool createGlobalMapping)
63
64
65
66
67
68
69
70
71
72
73
74
75
76
  {
    FUNCNAME("PetscSolver::init()");

    TEST_EXIT(meshDistributor)("No mesh distributor object defined!\n");
    TEST_EXIT(fe0.size())("No component spaces in PETSc solver object!\n");
    TEST_EXIT(fe1.size())("No FE spaces in PETSc solver object!\n");

    componentSpaces = fe0;
    feSpaces = fe1;

    MeshLevelData& levelData = meshDistributor->getMeshLevelData();
    int nLevels = levelData.getLevelNumber();
    TEST_EXIT_DBG(nLevels >= 1)("Should not happen!\n");

Thomas Witkowski's avatar
bo eh  
Thomas Witkowski committed
77
    if (createGlobalMapping) {
Thomas Witkowski's avatar
Thomas Witkowski committed
78
79
      parallelDofMappingsRegistered = true;

Thomas Witkowski's avatar
bo eh  
Thomas Witkowski committed
80
81
82
83
84
85
86
87
88
89
90
91
92
      dofMap.init(levelData, componentSpaces, feSpaces);
      dofMap.setMpiComm(levelData.getMpiComm(0), 0);
      dofMap.setDofComm(meshDistributor->getDofComm());
      dofMap.clear();
      meshDistributor->registerDofMap(dofMap);
      
      if (nLevels > 1) {
	dofMapSd.init(levelData, componentSpaces, feSpaces);
	dofMapSd.setMpiComm(levelData.getMpiComm(1), 1);
	dofMapSd.setDofComm(meshDistributor->getDofCommSd());
	dofMapSd.clear();
	meshDistributor->registerDofMap(dofMapSd);
      }
93
94
95
96
    }
  }


97
98
99
100
101
102
103
104
  void PetscSolver::fillPetscMatrix(DOFMatrix* mat)
  {
    Matrix<DOFMatrix*> sysMat(1, 1);
    sysMat[0][0] = mat;
    fillPetscMatrix(&sysMat);
  }


105
106
107
  void PetscSolver::solve(Vec &rhs, Vec &sol)
  {
    FUNCNAME("PetscSolver::solve()");
108

109
110
111
112
    PetscErrorCode solverError = KSPSolve(kspInterior, rhs, sol);
    if (solverError != 0) {
      AMDiS::finalize();
      exit(-1);
113
114
115
    }
  }

116

117
118
119
120
121
122
123
124
  void PetscSolver::solveGlobal(Vec &rhs, Vec &sol)
  {
    FUNCNAME("PetscSolver::solveGlobal()");

    ERROR_EXIT("Not implemented!\n");
  }


125
126
127
128
129
130
  void PetscSolver::copyVec(Vec& originVec, Vec& destVec, 
			    vector<int>& originIndex, vector<int>& destIndex)
  {
    FUNCNAME("PetscSolver::copyVec()");

    IS originIs, destIs;
131
    ISCreateGeneral(mpiCommGlobal, 
132
133
134
135
136
		    originIndex.size(), 
		    &(originIndex[0]),
		    PETSC_USE_POINTER,
		    &originIs);

137
    ISCreateGeneral(mpiCommGlobal, 
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
		    destIndex.size(), 
		    &(destIndex[0]),
		    PETSC_USE_POINTER,
		    &destIs);

    VecScatter scatter;
    VecScatterCreate(originVec, originIs, destVec, destIs, &scatter);
    VecScatterBegin(scatter, originVec, destVec,
		    INSERT_VALUES, SCATTER_FORWARD);
    VecScatterEnd(scatter, originVec, destVec,
		  INSERT_VALUES, SCATTER_FORWARD);

    ISDestroy(&originIs);
    ISDestroy(&destIs);    
    VecScatterDestroy(&scatter);
  }

Thomas Witkowski's avatar
Blub  
Thomas Witkowski committed
155
156
157
158
159
160
161
162

  bool PetscSolver::testMatrixSymmetric(Mat mat, bool advancedTest)
  {
    FUNCNAME("PetscSolver::testMatrixSymmetric()");

    Mat matTrans;
    MatTranspose(mat, MAT_INITIAL_MATRIX, &matTrans);

Thomas Witkowski's avatar
Thomas Witkowski committed
163
164
    bool isSym = true;

Thomas Witkowski's avatar
Blub  
Thomas Witkowski committed
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
    if (advancedTest) {
      int rowStart, rowEnd;
      MatGetOwnershipRange(mat, &rowStart, &rowEnd);

      PetscInt nCols, nColsTrans;
      const PetscInt *cols, *colsTrans;
      const PetscScalar *vals, *valsTrans;

      for (int i = rowStart; i < rowEnd; i++) {
	MatGetRow(mat, i, &nCols, &cols, &vals);
	MatGetRow(matTrans, i, &nColsTrans, &colsTrans, &valsTrans);

	if (nCols != nColsTrans) {
	  MSG("Symmetric test fails: mat row %d: %d nnz   mat col %d: %d nnz\n",
	      i, nCols, i, nColsTrans);
	  isSym = false;
	} else {
	  for (int j = 0; j < nCols; j++) {
	    if (cols[j] != colsTrans[j]) {
	      if (cols[j] > colsTrans[j]) {
		MSG("mat[%d][%d] does not exists: mat[%d][%d] = %e\n", 
		    i, colsTrans[j],
		    colsTrans[j], i, valsTrans[j]);
	      } else {
		MSG("mat[%d][%d] does not exists: mat[%d][%d] = %e\n", 
		    cols[j], i,
		    i, cols[j], vals[j]);
	      }
	      isSym = false;
	    } else {
	      double n = fabs(vals[j] - valsTrans[j]);
	      if (n > 1e-10) {
		MSG("value diff:  mat[%d][%d] = %e   mat[%d][%d] = %e\n",
		    i, cols[j], vals[j], colsTrans[j], i, valsTrans[j]);

		isSym = false;
	      }
	    }
	  }
	}

	MatRestoreRow(mat, i, &nCols, &cols, &vals);
	MatRestoreRow(matTrans, i, &nColsTrans, &colsTrans, &valsTrans);
      }
    } 
      
    MatAXPY(matTrans, -1.0, mat, DIFFERENT_NONZERO_PATTERN);
    double norm1, norm2;
    MatNorm(matTrans, NORM_FROBENIUS, &norm1);
    MatNorm(matTrans, NORM_INFINITY, &norm2);
    MatDestroy(&matTrans);
    
    MSG("Matrix norm test: %e %e\n", norm1, norm2);
    
Thomas Witkowski's avatar
Thomas Witkowski committed
219
    return (isSym && norm1 < 1e-10 && norm2 < 1e-10);
Thomas Witkowski's avatar
Blub  
Thomas Witkowski committed
220
  }
221
}