Ifpack2_Details_FastILU_Base_decl.hpp

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#ifndef __IFPACK2_FASTILU_BASE_DECL_HPP__ 
#define __IFPACK2_FASTILU_BASE_DECL_HPP__ 
 
#include <Tpetra_RowMatrix.hpp>
#include <Tpetra_CrsMatrix.hpp>
#include <Kokkos_DefaultNode.hpp>
#include <KokkosSparse_CrsMatrix.hpp>
#include <Ifpack2_Preconditioner.hpp>
#include "Ifpack2_Details_CanChangeMatrix.hpp"
 
namespace Ifpack2
{
namespace Details
{
 
template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  class FastILU_Base : public Ifpack2::Preconditioner<Scalar, LocalOrdinal, GlobalOrdinal, Node>,
                       public Ifpack2::Details::CanChangeMatrix<
                         Tpetra::RowMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node>>
{
  public:
    typedef typename Node::device_type device_type;
    typedef typename device_type::execution_space execution_space;
    typedef Tpetra::RowMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> TRowMatrix;
    typedef Tpetra::CrsMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> TCrsMatrix;
    typedef Tpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node> TMultiVec;
    typedef KokkosSparse::CrsMatrix<Scalar, LocalOrdinal, execution_space> KCrsMatrix;
    typedef Kokkos::View<LocalOrdinal *, execution_space> OrdinalArray;
    typedef Kokkos::View<LocalOrdinal *, Kokkos::HostSpace> OrdinalArrayHost;
    typedef Kokkos::View<Scalar *, execution_space> ScalarArray;
    typedef Kokkos::View<Scalar *, Kokkos::HostSpace> ScalarArrayHost;
 
    FastILU_Base(Teuchos::RCP<const TRowMatrix> mat_);
 
    Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> >
    getDomainMap () const;
 
    Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> >
    getRangeMap () const;
 
    void
    apply (const TMultiVec& X,
           TMultiVec& Y,
           Teuchos::ETransp mode = Teuchos::NO_TRANS,
           Scalar alpha = Teuchos::ScalarTraits<Scalar>::one(),
           Scalar beta = Teuchos::ScalarTraits<Scalar>::zero()) const;
 
    void setParameters (const Teuchos::ParameterList& List);
 
    void initialize();
 
    bool isInitialized() const;
 
    void compute();
 
    bool isComputed() const;
 
    Teuchos::RCP<const TRowMatrix> getMatrix() const;
 
    int getNumInitialize() const;
 
    int getNumCompute() const;
 
    int getNumApply() const;
 
    double getInitializeTime() const;
 
    double getComputeTime() const;
 
    double getApplyTime() const;
 
    double getCopyTime() const;
 
    virtual int getSweeps() const = 0;
 
    virtual int getNTrisol() const = 0;
 
    virtual void checkLocalILU() const;
 
    virtual void checkLocalIC() const;
 
    std::string description() const;
 
    void setMatrix(const Teuchos::RCP<const TRowMatrix>& A);
 
  protected:
    Teuchos::RCP<const TRowMatrix> mat_;
    bool initFlag_;
    bool computedFlag_;
    int nInit_;
    int nComputed_;
    mutable int nApply_;
    //store the local CRS components
    ScalarArray localValues_;     //set at beginning of compute()
    OrdinalArray localRowPtrs_;   //set in initialize()
    OrdinalArray localColInds_;   //set in initialize()
    OrdinalArrayHost localRowPtrsHost_; //set in initialize() and used to get localValues_ in compute()
    double initTime_;
    double computeTime_;
    mutable double applyTime_;
    double crsCopyTime_;         //total time spent deep copying values, rowptrs, colinds out of mat
 
    //Store validated parameter values (instead of keeping a ParameterList around)
    struct Params
    {
      Params() {}
      Params(const Teuchos::ParameterList& pL, std::string precType);
      int nFact;
      int nTrisol;
      int level;
      double omega;
      double shift;
      bool guessFlag;
      int blockSize;
      static Params getDefaults();
    };
 
    Params params_;
 
    // \pre !mat_.is_null()
    virtual void initLocalPrec() = 0;
    virtual void computeLocalPrec() = 0;
    virtual void applyLocalPrec(ScalarArray x, ScalarArray y) const = 0;
    virtual std::string getName() const = 0;
};
 
} //namespace Details
} //namespace Ifpack2
 
#endif