PetscSolver.cc 5.33 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()
24
25
26
    : ParallelCoarseSpaceMatVec(),
      dofMap(FESPACE_WISE),
      dofMapSd(FESPACE_WISE),
27
      kspPrefix(""),
28
29
      removeRhsNullspace(false),    
      hasConstantNullspace(false),
30
      isSymmetric(false),
31
      handleDirichletRows(true)
32
  {
33
34
    setDofMapping(&dofMap);

35
36
37
38
    string kspStr = "";
    Parameters::get("parallel->solver->petsc->ksp", kspStr);
    if (kspStr != "")
      PetscOptionsInsertString(kspStr.c_str());
39

Thomas Witkowski's avatar
Thomas Witkowski committed
40
41
    Parameters::get("parallel->remove rhs null space", removeRhsNullspace);
    Parameters::get("parallel->has constant null space", hasConstantNullspace);
42
43
    Parameters::get("parallel->nullspace->const in comp", 
		    constNullspaceComponent);
44
45
46
  }


47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
  void PetscSolver::init(vector<const FiniteElemSpace*> &fe0,
			 vector<const FiniteElemSpace*> &fe1)
  {
    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");

    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);
    }
  }


79
80
81
82
83
84
85
86
  void PetscSolver::fillPetscMatrix(DOFMatrix* mat)
  {
    Matrix<DOFMatrix*> sysMat(1, 1);
    sysMat[0][0] = mat;
    fillPetscMatrix(&sysMat);
  }


87
88
89
  void PetscSolver::solve(Vec &rhs, Vec &sol)
  {
    FUNCNAME("PetscSolver::solve()");
90

91
92
93
94
    PetscErrorCode solverError = KSPSolve(kspInterior, rhs, sol);
    if (solverError != 0) {
      AMDiS::finalize();
      exit(-1);
95
96
97
    }
  }

98

99
100
101
102
103
104
105
106
  void PetscSolver::solveGlobal(Vec &rhs, Vec &sol)
  {
    FUNCNAME("PetscSolver::solveGlobal()");

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


107
108
109
110
111
112
  void PetscSolver::copyVec(Vec& originVec, Vec& destVec, 
			    vector<int>& originIndex, vector<int>& destIndex)
  {
    FUNCNAME("PetscSolver::copyVec()");

    IS originIs, destIs;
113
    ISCreateGeneral(mpiCommGlobal, 
114
115
116
117
118
		    originIndex.size(), 
		    &(originIndex[0]),
		    PETSC_USE_POINTER,
		    &originIs);

119
    ISCreateGeneral(mpiCommGlobal, 
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
		    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
137
138
139
140
141
142
143
144

  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
145
146
    bool isSym = true;

Thomas Witkowski's avatar
Blub  
Thomas Witkowski committed
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
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
    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
201
    return (isSym && norm1 < 1e-10 && norm2 < 1e-10);
Thomas Witkowski's avatar
Blub  
Thomas Witkowski committed
202
  }
203
}