IFPACK Development
Loading...
Searching...
No Matches
Ifpack_OverlapGraph.cpp
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
8// license for use of this work by or on behalf of the U.S. Government.
9//
10// Redistribution and use in source and binary forms, with or without
11// modification, are permitted provided that the following conditions are
12// met:
13//
14// 1. Redistributions of source code must retain the above copyright
15// notice, this list of conditions and the following disclaimer.
16//
17// 2. Redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution.
20//
21// 3. Neither the name of the Corporation nor the names of the
22// contributors may be used to endorse or promote products derived from
23// this software without specific prior written permission.
24//
25// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
26// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
29// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36//
37// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
38//
39// ***********************************************************************
40//@HEADER
41*/
42
43#include "Ifpack_OverlapGraph.h"
44#include "Epetra_CrsGraph.h"
45#include "Epetra_RowMatrix.h"
46#include "Epetra_BlockMap.h"
47#include "Epetra_Map.h"
48
49#include <Teuchos_ParameterList.hpp>
50#include <ifp_parameters.h>
51
52//==============================================================================
53Ifpack_OverlapGraph::Ifpack_OverlapGraph(const Teuchos::RefCountPtr<const Epetra_CrsGraph>& UserMatrixGraph_in, int OverlapLevel_in)
54 : UserMatrixGraph_(UserMatrixGraph_in),
55 OverlapLevel_(OverlapLevel_in)
56{
57 // Test for non-trivial overlap here so we can use it later.
58 IsOverlapped_ = (OverlapLevel_in>0 && UserMatrixGraph_in->DomainMap().DistributedGlobal());
59
60 ConstructOverlapGraph(UserMatrixGraph_in);
61
62}
63//==============================================================================
64Ifpack_OverlapGraph::Ifpack_OverlapGraph(const Teuchos::RefCountPtr<const Epetra_RowMatrix>& UserMatrix_in, int OverlapLevel_in)
65 : UserMatrix_(UserMatrix_in),
66 OverlapLevel_(OverlapLevel_in)
67{
68 // Test for non-trivial overlap here so we can use it later.
69 IsOverlapped_ = (OverlapLevel_in>0 && UserMatrix_in->OperatorDomainMap().DistributedGlobal());
70
71 throw ReportError("This constructor is not implemented yet. Need to add Epetra_SrcObject support to Epetra_Import/Export", -1);
72}
73//==============================================================================
75 : OverlapGraph_(Source.OverlapGraph_),
76 UserMatrixGraph_(Source.UserMatrixGraph_),
77 UserMatrix_(Source.UserMatrix_),
78 OverlapRowMap_(Source.OverlapRowMap_),
79 OverlapLevel_(Source.OverlapLevel_),
80 IsOverlapped_(Source.IsOverlapped_)
81{
82 if (IsOverlapped_) {
83 if (OverlapGraph_!=Teuchos::null) OverlapGraph_ = Teuchos::rcp( new Epetra_CrsGraph(*OverlapGraph_) );
84 if (OverlapRowMap_!=Teuchos::null) OverlapRowMap_ = Teuchos::rcp( new Epetra_BlockMap(*OverlapRowMap_) );
85 }
86
87}
88
89//==========================================================================
90int Ifpack_OverlapGraph::SetParameters(const Teuchos::ParameterList& parameterlist,
91 bool cerr_warning_if_unused)
92{
94 params.int_params[Ifpack::level_overlap-FIRST_INT_PARAM] = OverlapLevel_;
95
96 Ifpack::set_parameters(parameterlist, params, cerr_warning_if_unused);
97
98 OverlapLevel_ = params.int_params[Ifpack::level_overlap-FIRST_INT_PARAM];
99 return(0);
100}
101
102//==============================================================================
103int Ifpack_OverlapGraph::ConstructOverlapGraph(const Teuchos::RefCountPtr<const Epetra_CrsGraph>& UserMatrixGraph) {
104
105 if (!IsOverlapped_) {
106 OverlapGraph_ = Teuchos::rcp_const_cast<Epetra_CrsGraph>( UserMatrixGraph );
107 OverlapRowMap_ = Teuchos::rcp( (Epetra_BlockMap *) &UserMatrixGraph->RowMap(), false );
108 return(0); // All done
109 }
110
111 Teuchos::RefCountPtr<Epetra_CrsGraph> OldGraph;
112 Teuchos::RefCountPtr<Epetra_BlockMap> OldRowMap;
113 const Epetra_BlockMap DomainMap = UserMatrixGraph->DomainMap();
114 const Epetra_BlockMap RangeMap = UserMatrixGraph->RangeMap();
115
116 for (int level=1; level <= OverlapLevel_; level++) {
117 OldGraph = OverlapGraph_;
118 OldRowMap = OverlapRowMap_;
119
120 OverlapImporter_ = Teuchos::rcp( (Epetra_Import *) OldGraph->Importer(), false );
121 OverlapRowMap_ = Teuchos::rcp( new Epetra_BlockMap(OverlapImporter_->TargetMap()) );
122
123 if (level<OverlapLevel_)
124 OverlapGraph_ = Teuchos::rcp( new Epetra_CrsGraph(Copy, *OverlapRowMap_, 0) );
125 else
126 // On last iteration, we want to filter out all columns except those that correspond
127 // to rows in the graph. This assures that our matrix is square
128 OverlapGraph_ = Teuchos::rcp( new Epetra_CrsGraph(Copy, *OverlapRowMap_, *OverlapRowMap_, 0) );
129
130 EPETRA_CHK_ERR(OverlapGraph_->Import( *UserMatrixGraph, *OverlapImporter_, Insert));
131 if (level<OverlapLevel_) {
132 EPETRA_CHK_ERR(OverlapGraph_->FillComplete(DomainMap, RangeMap));
133 }
134 else {
135 // Copy last OverlapImporter because we will use it later
136 OverlapImporter_ = Teuchos::rcp( new Epetra_Import(*OverlapRowMap_, DomainMap) );
137 EPETRA_CHK_ERR(OverlapGraph_->FillComplete(DomainMap, RangeMap));
138 }
139
140 }
141
142 return(0);
143}
144
virtual int ReportError(const std::string Message, int ErrorCode) const
Ifpack_OverlapGraph: Constructs a graph for use with Ifpack preconditioners.
Ifpack_OverlapGraph(const Teuchos::RefCountPtr< const Epetra_CrsGraph > &UserMatrixGraph_in, int OverlapLevel_in)
Constructor using Epetra_CrsGraph.
int SetParameters(const Teuchos::ParameterList &parameterlist, bool cerr_warning_if_unused=false)
Set parameters using a Teuchos::ParameterList object.