Ifpack2_Chebyshev_decl.hpp

Go to the documentation of this file.

/*
@HEADER
// ***********************************************************************
//
//       Ifpack2: Tempated Object-Oriented Algebraic Preconditioner Package
//                 Copyright (2009) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
*/


#ifndef IFPACK2_CHEBYSHEV_DECL_HPP
#define IFPACK2_CHEBYSHEV_DECL_HPP

#include <Ifpack2_ConfigDefs.hpp>
#include <Ifpack2_Preconditioner.hpp>
#include <Ifpack2_Details_CanChangeMatrix.hpp>

// FIXME (mfh 20 Nov 2013) We really shouldn't have to include both of
// these, if we were to handle the implementation by pointer instead
// of by value.
#include <Ifpack2_Details_Chebyshev_decl.hpp>
#include <Ifpack2_Details_Chebyshev_def.hpp>

#include <Tpetra_CrsMatrix.hpp>

#include <iostream>
#include <string>
#include <sstream>


namespace Ifpack2 {

template<class MatrixType>
class Chebyshev :
    virtual public Ifpack2::Preconditioner<typename MatrixType::scalar_type,
                                           typename MatrixType::local_ordinal_type,
                                           typename MatrixType::global_ordinal_type,
                                           typename MatrixType::node_type>,
    virtual public Ifpack2::Details::CanChangeMatrix<Tpetra::RowMatrix<typename MatrixType::scalar_type,
                                                                       typename MatrixType::local_ordinal_type,
                                                                       typename MatrixType::global_ordinal_type,
                                                                       typename MatrixType::node_type> >
{
public:


  typedef MatrixType matrix_type;

  typedef typename MatrixType::scalar_type scalar_type;

  TEUCHOS_DEPRECATED typedef typename MatrixType::scalar_type Scalar;


  typedef typename MatrixType::local_ordinal_type local_ordinal_type;

  TEUCHOS_DEPRECATED typedef typename MatrixType::local_ordinal_type LocalOrdinal;


  typedef typename MatrixType::global_ordinal_type global_ordinal_type;

  TEUCHOS_DEPRECATED typedef typename MatrixType::global_ordinal_type GlobalOrdinal;


  typedef typename MatrixType::node_type node_type;

  TEUCHOS_DEPRECATED typedef typename MatrixType::node_type Node;


  typedef typename Teuchos::ScalarTraits<scalar_type>::magnitudeType magnitude_type;

  TEUCHOS_DEPRECATED typedef typename Teuchos::ScalarTraits<scalar_type>::magnitudeType magnitudeType;


  typedef Tpetra::RowMatrix<scalar_type,local_ordinal_type,global_ordinal_type,node_type> row_matrix_type;

  typedef Tpetra::Map<local_ordinal_type,global_ordinal_type,node_type> map_type;

  typedef Tpetra::Vector<scalar_type,local_ordinal_type,global_ordinal_type,node_type> vector_type;

  // \name Constructors and destructors

  explicit Chebyshev (const Teuchos::RCP<const row_matrix_type>& A);

  virtual ~Chebyshev ();




  void setParameters (const Teuchos::ParameterList& params);

  void initialize();

  inline bool isInitialized() const {
    return IsInitialized_;
  }

  void compute ();

  inline bool isComputed() const {
    return IsComputed_;
  }




  virtual void
  setMatrix (const Teuchos::RCP<const row_matrix_type>& A);




  void
  apply (const Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& X,
         Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& Y,
         Teuchos::ETransp mode = Teuchos::NO_TRANS,
         scalar_type alpha = Teuchos::ScalarTraits<scalar_type>::one(),
         scalar_type beta = Teuchos::ScalarTraits<scalar_type>::zero()) const;

  Teuchos::RCP<const map_type> getDomainMap() const;

  Teuchos::RCP<const map_type> getRangeMap() const;

  bool hasTransposeApply() const;

  void
  applyMat (const Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& X,
            Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& Y,
            Teuchos::ETransp mode = Teuchos::NO_TRANS) const;




  virtual magnitude_type TEUCHOS_DEPRECATED
  computeCondEst (CondestType CT = Cheap,
                  local_ordinal_type MaxIters = 1550,
                  magnitude_type Tol = 1e-9,
                  const Teuchos::Ptr<const row_matrix_type>& matrix = Teuchos::null);




  virtual magnitude_type TEUCHOS_DEPRECATED getCondEst() const;

  Teuchos::RCP<const Teuchos::Comm<int> > getComm() const;

  Teuchos::RCP<const row_matrix_type> getMatrix() const;

  Teuchos::RCP<const MatrixType > getCrsMatrix() const;

  double getComputeFlops() const;

  double getApplyFlops() const;

  int getNumInitialize() const;

  int getNumCompute() const;

  int getNumApply() const;

  double getInitializeTime() const;

  double getComputeTime() const;

  double getApplyTime() const;

  typename MatrixType::scalar_type getLambdaMaxForApply() const;




  std::string description() const;

  void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const;




  static void TEUCHOS_DEPRECATED
  PowerMethod (const Tpetra::Operator<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& Operator,
               const vector_type& InvPointDiagonal,
               const int MaximumIterations,
               scalar_type& LambdaMax);

  static void TEUCHOS_DEPRECATED
  CG (const Tpetra::Operator<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& Operator,
      const vector_type& InvPointDiagonal,
      const int MaximumIterations,
      scalar_type& lambda_min, scalar_type& lambda_max);

  // This "template friend" declaration lets any Chebyshev
  // specialization be a friend of any of its other specializations.
  // That makes clone() easier to implement.
  template <class NewMatrixType> friend class Chebyshev;

  template <typename NewMatrixType>
  Teuchos::RCP<Chebyshev<NewMatrixType> >
  clone (const Teuchos::RCP<const NewMatrixType>& A_newnode,
         const Teuchos::ParameterList& params) const;


private:

  typedef Teuchos::ScalarTraits<typename MatrixType::scalar_type> STS;

  typedef Tpetra::MultiVector<scalar_type, local_ordinal_type, global_ordinal_type, node_type> MV;

  Chebyshev (const Chebyshev<MatrixType>&);

  Chebyshev<MatrixType>& operator= (const Chebyshev<MatrixType>&);

  void
  applyImpl (const MV& X,
             MV& Y,
             Teuchos::ETransp mode,
             scalar_type alpha,
             scalar_type beta) const;



  mutable Details::Chebyshev<scalar_type, MV> impl_;

  magnitude_type Condest_;
  bool IsInitialized_;
  bool IsComputed_;
  int NumInitialize_;
  int NumCompute_;
  mutable int NumApply_;
  double InitializeTime_;
  double ComputeTime_;
  mutable double ApplyTime_;
  double ComputeFlops_;
  mutable double ApplyFlops_;

}; // class Chebyshev


template <typename MatrixType>
template <typename NewMatrixType>
Teuchos::RCP<Chebyshev<NewMatrixType> >
Chebyshev<MatrixType>::
clone (const Teuchos::RCP<const NewMatrixType>& A_newnode,
       const Teuchos::ParameterList& params) const
{
  using Teuchos::RCP;
  typedef Ifpack2::Chebyshev<NewMatrixType> new_prec_type;

  RCP<new_prec_type> prec (new new_prec_type (A_newnode));
  prec->setParameters (params);
  prec->initialize ();
  prec->compute ();
  return prec;
}

} // namespace Ifpack2

#endif // IFPACK2_CHEBYSHEV_DECL_HPP