PetscSolverGlobalMatrix.h 3.08 KB
Newer Older
Thomas Witkowski's avatar
Thomas Witkowski committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
// ============================================================================
// ==                                                                        ==
// == AMDiS - Adaptive multidimensional simulations                          ==
// ==                                                                        ==
// ==  http://www.amdis-fem.org                                              ==
// ==                                                                        ==
// ============================================================================
//
// 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.



/** \file PetscSolverGlobalMatrix.h */

#ifndef AMDIS_PETSC_SOLVER_GLOBAL_MATRIX_H
#define AMDIS_PETSC_SOLVER_GLOBAL_MATRIX_H

26
#include <boost/tuple/tuple.hpp>
Thomas Witkowski's avatar
Thomas Witkowski committed
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
#include "AMDiS_fwd.h"
#include "parallel/PetscSolver.h"

namespace AMDiS {

  using namespace std;

  class PetscSolverGlobalMatrix : public PetscSolver
  {
  public:
    PetscSolverGlobalMatrix()
      : PetscSolver(),
	d_nnz(NULL),
	o_nnz(NULL),
	lastMeshNnz(0),
42
	zeroStartVector(false),
43
	alwaysCreateNnzStructure(false)
Thomas Witkowski's avatar
Thomas Witkowski committed
44
    {
45
      Parameters::get("parallel->use zero start vector", zeroStartVector);
46
47
      Parameters::get("parallel->always create nnz structure", 
		      alwaysCreateNnzStructure);
Thomas Witkowski's avatar
Thomas Witkowski committed
48
49
    }

50
51
52
    void fillPetscMatrix(Matrix<DOFMatrix*> *mat);

    void fillPetscRhs(SystemVector *vec);
Thomas Witkowski's avatar
Thomas Witkowski committed
53
54
55

    void solvePetscMatrix(SystemVector &vec, AdaptInfo *adaptInfo);    

56
    void destroyMatrixData();
57

58
59
    void destroyVectorData();

Thomas Witkowski's avatar
Thomas Witkowski committed
60
61
62
63
64
  protected:
    /// Creates a new non zero pattern structure for the PETSc matrix. 
    void createPetscNnzStructure(Matrix<DOFMatrix*> *mat);
    
    /// Takes a DOF matrix and sends the values to the global PETSc matrix.
65
    void setDofMatrix(DOFMatrix* mat, int nRowMat = 0, int nColMat = 0);
Thomas Witkowski's avatar
Thomas Witkowski committed
66
67
68

    /// Takes a DOF vector and sends its values to a given PETSc vector.
    void setDofVector(Vec& petscVec, DOFVector<double>* vec, 
69
		      int nRowVec, bool rankOnly = false);
Thomas Witkowski's avatar
Thomas Witkowski committed
70
71
72
73
74
75
76
77
78
79
80
81
82
83

  protected:
    /// Arrays definig the non zero pattern of Petsc's matrix.
    int *d_nnz, *o_nnz;

    /** \brief
     * Stores the mesh change index of the mesh the nnz structure was created for.
     * Therefore, if the mesh change index is higher than this value, we have to create
     * a new nnz structure for PETSc matrices, because the mesh has been changed and
     * therefore also the assembled matrix structure.
     */
    int lastMeshNnz;

    bool zeroStartVector;
84
85
86
87
88
89
90
91

    /// If this variable is set to true, the non-zero matrix structure is
    /// created each time from scratch by calling \ref createPetscNnzStrcuture.
    /// This can be necessary if the number of non-zeros in the matrix varies
    /// though the mesh does not change. This may happen if there are many
    /// operators using DOFVectors from old timestep containing many zeros due to
    /// some phase fields.
    bool alwaysCreateNnzStructure;
Thomas Witkowski's avatar
Thomas Witkowski committed
92
93
94
95
96
97
98
  };


}

#endif