Ifpack_SORa.h

Go to the documentation of this file.

/*@HEADER
// ***********************************************************************
//
//       Ifpack: Object-Oriented Algebraic Preconditioner Package
//                 Copyright (2002) 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 IFPACK_SORA_H
#define IFPACK_SORA_H
 
#include "Ifpack_ConfigDefs.h"
#include "Ifpack_Preconditioner.h"
 
#ifdef HAVE_IFPACK_EPETRAEXT
#include "Ifpack_Condest.h"
#include "Ifpack_ScalingType.h"
#include "Epetra_CompObject.h"
#include "Epetra_MultiVector.h"
#include "Epetra_Vector.h"
#include "Epetra_CrsGraph.h"
#include "Epetra_CrsMatrix.h"
#include "Epetra_BlockMap.h"
#include "Epetra_Map.h"
#include "Epetra_Object.h"
#include "Epetra_Comm.h"
#include "Epetra_CrsMatrix.h"
#include "Epetra_Time.h"
#include "Teuchos_RefCountPtr.hpp"
#include "EpetraExt_Transpose_RowMatrix.h"
 
 
namespace Teuchos {
  class ParameterList;
}


 
class Ifpack_SORa: public Ifpack_Preconditioner {
 
public:
  // @{ Constructors and destructors.

  Ifpack_SORa(Epetra_RowMatrix* A);

  ~Ifpack_SORa()
  {
    Destroy();
  }
 
  // @}
  // @{ Construction methods

  int Initialize();

  bool IsInitialized() const
  {
    return(IsInitialized_);
  }


  int Compute();

  bool IsComputed() const
  {
    return(IsComputed_);
  }

  /* This method is only available if the Teuchos package is enabled.
     This method recognizes four parameter names: relax_value,
     absolute_threshold, relative_threshold and overlap_mode. These names are
     case insensitive, and in each case except overlap_mode, the ParameterEntry
     must have type double. For overlap_mode, the ParameterEntry must have
     type Epetra_CombineMode.
  */
  int SetParameters(Teuchos::ParameterList& parameterlist);


  int SetUseTranspose(bool UseTranspose_in) {UseTranspose_ = UseTranspose_in; return(0);};
  // @}
 
  // @{ Mathematical functions.
  // Applies the matrix to X, returns the result in Y.
  int Apply(const Epetra_MultiVector& X,
               Epetra_MultiVector& Y) const
  {
    return(Multiply(false,X,Y));
  }
 
  int Multiply(bool Trans, const Epetra_MultiVector& X,
               Epetra_MultiVector& Y) const{return A_->Multiply(Trans,X,Y);}


  int ApplyInverse(const Epetra_MultiVector& X, Epetra_MultiVector& Y) const;

  double Condest(const Ifpack_CondestType CT = Ifpack_Cheap,
                 const int MaxIters = 1550,
                 const double Tol = 1e-9,
                 Epetra_RowMatrix* Matrix_in = 0);

  double Condest() const
  {
    return(Condest_);
  }
 
  // @}
  // @{ Query methods

  const char* Label() const {return(Label_);}

  int SetLabel(const char* Label_in)
  {
    strcpy(Label_,Label_in);
    return(0);
  }

  double NormInf() const {return(0.0);};

  bool HasNormInf() const {return(false);};

  bool UseTranspose() const {return(UseTranspose_);};

  const Epetra_Map & OperatorDomainMap() const {return(A_->OperatorDomainMap());};

  const Epetra_Map & OperatorRangeMap() const{return(A_->OperatorRangeMap());};

  const Epetra_Comm & Comm() const{return(A_->Comm());};

  const Epetra_RowMatrix& Matrix() const
  {
    return(*A_);
  }

  virtual double GetLambdaMax() const{return LambdaMax_;}

  virtual double GetOmega() const{if(UseGlobalDamping_) return 12.0/(11.0*LambdaMax_); else return 1.0;}

  virtual std::ostream& Print(std::ostream& os) const;

  virtual int NumInitialize() const
  {
    return(NumInitialize_);
  }

  virtual int NumCompute() const
  {
    return(NumCompute_);
  }

  virtual int NumApplyInverse() const
  {
    return(NumApplyInverse_);
  }

  virtual double InitializeTime() const
  {
    return(InitializeTime_);
  }

  virtual double ComputeTime() const
  {
    return(ComputeTime_);
  }

  virtual double ApplyInverseTime() const
  {
    return(ApplyInverseTime_);
  }

  virtual double InitializeFlops() const
  {
    return(0.0);
  }
 
  virtual double ComputeFlops() const
  {
    return(ComputeFlops_);
  }
 
  virtual double ApplyInverseFlops() const
  {
    return(ApplyInverseFlops_);
  }
 
private:
 
  // @}
  // @{ Private methods

  Ifpack_SORa(const Ifpack_SORa& RHS) :
    Time_(RHS.Comm())
  {}

  Ifpack_SORa& operator=(const Ifpack_SORa& /* RHS */)
  {
    return(*this);
  }

  void Destroy();


  int Solve(bool Trans, const Epetra_MultiVector& X, Epetra_MultiVector& Y) const;
 
 
#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  int NumGlobalRows() const {return(A_->NumGlobalRows());};

  int NumGlobalCols() const {return(A_->NumGlobalCols());};
#endif
  long long NumGlobalRows64() const {return(A_->NumGlobalRows64());};
  long long NumGlobalCols64() const {return(A_->NumGlobalCols64());};

  int NumMyRows() const {return(A_->NumMyRows());};

  int NumMyCols() const {return(A_->NumMyCols());};

  int PowerMethod(const int MaximumIterations,  double& lambda_max,const unsigned int * RngSeed=0);

  /*  Epetra_RowMatrix& Matrix()
  {
    return(*A_);
    }*/
  template<typename int_type>
  int TCompute();
 
  // @}
  // @{ Internal data

  Teuchos::RefCountPtr<Epetra_CrsMatrix> Acrs_;
  Teuchos::RefCountPtr<Epetra_RowMatrix> A_;
  Teuchos::RefCountPtr<Epetra_CrsMatrix> W_; // Strict lower triangle
  Teuchos::RefCountPtr<Epetra_Vector>    Wdiag_;
  Teuchos::ParameterList List_;
 
  bool UseTranspose_;
  double Condest_;
 

  bool IsInitialized_;
  bool IsComputed_;
  char Label_[160];
  int NumInitialize_;
  int NumCompute_;

  double Alpha_;
  double Gamma_;
  int NumSweeps_;
  bool IsParallel_;
  bool HaveOAZBoundaries_;
  bool UseInterprocDamping_;
  bool UseGlobalDamping_;
  double LambdaMax_;
  double LambdaMaxBoost_;
  int PowerMethodIters_;

  mutable int NumApplyInverse_;
  double InitializeTime_;
  double ComputeTime_;
  mutable double ApplyInverseTime_;
  double ComputeFlops_;
  mutable double ApplyInverseFlops_;
  mutable Epetra_Time Time_;
 
};
#else
#endif
#endif /* IFPACK_SORa_H */