88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
/*@HEADER
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// ***********************************************************************
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//
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// Ifpack: Object-Oriented Algebraic Preconditioner Package
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// Copyright (2002) Sandia Corporation
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//
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// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// license for use of this work by or on behalf of the U.S. Government.
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
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//
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// ***********************************************************************
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//@HEADER
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*/
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#ifndef IFPACK_METISPARTITIONER_H
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#define IFPACK_METISPARTITIONER_H
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#include "Ifpack_ConfigDefs.h"
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#include "Ifpack_Partitioner.h"
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#include "Ifpack_OverlappingPartitioner.h"
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#include "Teuchos_ParameterList.hpp"
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class Ifpack_Graph;
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class Epetra_Map;
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class Epetra_BlockMap;
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class Epetra_Import;
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//! Ifpack_METISPartitioner: A class to decompose Ifpack_Graph's using METIS.
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/*!
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Class Ifpack_METISPartitioner enables the decomposition of the local
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Ifpack_Graph's using METIS. In order to work properly, this class requires
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IFPACK to be configured with option \c --enable-ifpack-metis.
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Otherwise, this class will always create one partition.
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\date Last modified: Oct-04.
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*/
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class Ifpack_METISPartitioner : public Ifpack_OverlappingPartitioner {
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public:
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//! Constructor.
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Ifpack_METISPartitioner(const Ifpack_Graph* Graph) :
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Ifpack_OverlappingPartitioner(Graph),
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UseSymmetricGraph_(true)
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{}
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//! Destructor.
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virtual ~Ifpack_METISPartitioner() {};
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//! Sets all the parameters for the partitioner (none at moment).
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int SetPartitionParameters(Teuchos::ParameterList& List)
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{
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// `true' is the safest option, as singletons may still be
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// in the system, even after Ifpack_SingletonFilter (think
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// for example to an upper triangular matrix, which has one
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// singleton, and still has one after the elimination of
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// the first one...)
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UseSymmetricGraph_ = List.get("partitioner: use symmetric graph",
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UseSymmetricGraph_);
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return(0);
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}
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//! Computes the partitions. Returns 0 if successful.
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int ComputePartitions();
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private:
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bool UseSymmetricGraph_;
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}; // class Ifpack_METISPartitioner
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#endif // IFPACK_METISPARTITIONER_H
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