Amesos_Superlu.h

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//
//                Amesos: Direct Sparse Solver Package
//                 Copyright (2004) 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.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
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//
//  Coding tasks:
//  1)  Create the dense matrices in Solve()   DONE
//  2)  Make the call to dgsvx() in Factor() dONE
//  3)  Make the call to dgsvx() in Solve()  DONE
//
//  Later coding tasks:
//  0)  Factor called twice
//  1)  Refactor()
//  2)  Parameter list
//  3)  Transpose  - DONE
//  4)  Destructor - In particular, need to call the SuperLU_FREE routines.
//  5)  Coments - especially in Amesos_Superlu.h
//
//  SymbolicFactorization() performs no action other than making sure that Factorization
//    s performed
//  NumericFactorization() performs the factorization but no solve (right hand side is
//    is set to 0 vectors) reuses factors only if ReuseFactorization_ is set.
//    If FactorizationOK_() && ReuseSymbolic_
//       ReFactor()
//    else
//       Factor()
//
//  Solve()
//
//  Factor() does everything from scratch:
//    Redistributes the data if necessary
//      Deletes any data structures left over from the previous call to Factor()
//    Copies the data into the format that SuperLU wants it
//    Calls dgssvx to factor the matrix with factor set to true
//  ReFactor()
//    Redistributes the data if necessary
//      - Attempting to check to make sure that the non-zero structure is unchanged
//    Copies the data into the format that SuperLU already has it
//       FIRST PASS - assert( false )
//

#ifndef AMESOS_SUPERLU_H
#define AMESOS_SUPERLU_H

#include "Amesos_ConfigDefs.h"
#include "Amesos_BaseSolver.h"
#include "Amesos_NoCopiable.h"
#include "Amesos_Utils.h"
#include "Amesos_Time.h"
#include "Amesos_Status.h"
#include "Amesos_Control.h"
#include "Teuchos_RCP.hpp"

class SLUData;
class Epetra_Comm;
class Epetra_CrsMatrix;
class Epetra_LinearProblem;


class Amesos_Superlu: public Amesos_BaseSolver,
                      private Amesos_Time,
                      private Amesos_NoCopiable,
                      private Amesos_Utils,
                      private Amesos_Control,
                      private Amesos_Status {

public:


  Amesos_Superlu(const Epetra_LinearProblem& LinearProblem );

  ~Amesos_Superlu();



  int SymbolicFactorization();

  int NumericFactorization();

  int Solve();



  const Epetra_LinearProblem *GetProblem() const { return(Problem_); };

  bool MatrixShapeOK() const ;

  int SetUseTranspose (bool useTheTranspose) {
    UseTranspose_ = useTheTranspose; return(0);
  }

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

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

  int SetParameters( Teuchos::ParameterList &ParameterList )  ;

  int NumSymbolicFact() const { return( Amesos_Status::NumSymbolicFact_ ); }

  int NumNumericFact() const { return( Amesos_Status::NumNumericFact_ ); }

  int NumSolve() const { return( Amesos_Status::NumSolve_ ); }

  void PrintTiming() const;

  void PrintStatus() const;

  void GetTiming( Teuchos::ParameterList &TimingParameterList ) const { Amesos_Time::GetTiming(TimingParameterList); }

private:



  // Note: this method is delicate!
  const Epetra_Map& SerialMap() const
  {
    return(*(SerialMap_.get()));
  }

  // Note: this method is delicate!
  const Epetra_Import& ImportToSerial() const
  {
    return(*(ImportToSerial_.get()));
  }

  int Factor();
  int ReFactor();

  int ConvertToSerial();

  // Note:  All action is performed on process 0
  int PerformNumericFactorization();


  SLUData* data_;
  std::vector<double> berr_;
  std::vector<double> ferr_;
  std::vector<int> perm_r_;
  std::vector<int> perm_c_;
  std::vector<int> etree_;
  std::vector<double> R_;
  std::vector<double> C_;
  char equed_;
  // no idea of the following.
  double* DummyArray;

  std::vector <int> Ap_;
  std::vector <int> Ai_;
  std::vector <double> Aval_;
  long long NumGlobalRows_;
  long long NumGlobalNonzeros_;
  bool UseTranspose_;
  bool FactorizationOK_;
  bool FactorizationDone_;
  bool ReuseSymbolic_;
  int iam_;
  int MtxConvTime_, MtxRedistTime_, VecRedistTime_;
  int NumFactTime_, SolveTime_, OverheadTime_;
  Teuchos::RCP<Epetra_Map> SerialMap_;
  Teuchos::RCP<Epetra_CrsMatrix> SerialCrsMatrixA_;
  Teuchos::RCP<Epetra_Import> ImportToSerial_;
  Epetra_RowMatrix* SerialMatrix_ ;
  const Epetra_LinearProblem* Problem_;
  Epetra_RowMatrix* RowMatrixA_;

};  // End of  class Amesos_Superlu
#endif /* AMESOS_SUPERLU_H */