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Ifpack_METISReordering.h
1/*@HEADER
2// ***********************************************************************
3//
4// Ifpack: Object-Oriented Algebraic Preconditioner Package
5// Copyright (2002) Sandia Corporation
6//
7// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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42
43#ifndef IFPACK_METISREORDERING_H
44#define IFPACK_METISREORDERING_H
45
46#include "Ifpack_ConfigDefs.h"
47#include "Ifpack_Reordering.h"
48#include "Epetra_RowMatrix.h"
49#include "Teuchos_ParameterList.hpp"
50#include "Teuchos_RefCountPtr.hpp"
51
52class Epetra_Comm;
53class Ifpack_Graph;
54class Epetra_Map;
55class Epetra_BlockMap;
56class Epetra_Import;
57
59
61
62public:
63
66
69
71 virtual int SetParameter(const std::string Name, const int Value)
72 {
73 if (Name == "partitioner: use symmetric graph")
74 UseSymmetricGraph_ = (bool)Value;
75 return(0);
76 }
77
79 virtual int SetParameter(const std::string /* Name */, const double /* Value */)
80 {
81 return(0);
82 };
83
85 virtual int SetParameters(Teuchos::ParameterList& List)
86 {
87 UseSymmetricGraph_ = List.get("partitioner: use symmetric graph",
88 UseSymmetricGraph_);
89
90 return(0);
91 }
92
94 virtual int Compute(const Ifpack_Graph& Graph);
95
97 virtual int Compute(const Epetra_RowMatrix& Matrix);
98
100 virtual bool IsComputed() const
101 {
102 return(IsComputed_);
103 }
104
106 virtual int Reorder(const int i) const;
107
109 virtual int InvReorder(const int i) const;
110
112 virtual int P(const Epetra_MultiVector& Xorig,
113 Epetra_MultiVector& X) const;
114
116 virtual int Pinv(const Epetra_MultiVector& Xorig,
117 Epetra_MultiVector& X) const;
118
120 virtual std::ostream& Print(std::ostream& os) const;
121
122private:
124 bool UseSymmetricGraph_;
126 int NumMyRows_;
128 bool IsComputed_;
130 std::vector<int> Reorder_;
132 std::vector<int> InvReorder_;
133
134}; // class Ifpack_METISReordering
135
136#endif // IFPACK_METISREORDERING_H
Ifpack_Graph: a pure virtual class that defines graphs for IFPACK.
Ifpack_METISReordering: A class to reorder a graph using METIS.
virtual int Pinv(const Epetra_MultiVector &Xorig, Epetra_MultiVector &X) const
Applies inverse reordering to multivector Xorig, whose local length equals the number of local rows,...
virtual int InvReorder(const int i) const
Returns the inverse reordered index of row i.
virtual std::ostream & Print(std::ostream &os) const
Prints basic information on iostream. This function is used by operator<<.
virtual int P(const Epetra_MultiVector &Xorig, Epetra_MultiVector &X) const
Applies reordering to multivector Xorig, whose local length equals the number of local rows,...
virtual ~Ifpack_METISReordering()
Destructor.
virtual bool IsComputed() const
Returns true is the reordering object has been successfully initialized, false otherwise.
virtual int SetParameter(const std::string Name, const int Value)
Sets integer parameters ‘Name’.
virtual int Compute(const Ifpack_Graph &Graph)
Computes all it is necessary to initialize the reordering object.
virtual int SetParameter(const std::string, const double)
Sets double parameters ‘Name’.
virtual int Reorder(const int i) const
Returns the reordered index of row i.
virtual int SetParameters(Teuchos::ParameterList &List)
Sets all the parameters for the partitioner (none at moment).
Ifpack_Reordering: basic class for reordering for a Ifpack_Graph object.