Ifpack2_Relaxation_decl.hpp

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//       Ifpack2: Templated Object-Oriented Algebraic Preconditioner Package
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#ifndef IFPACK2_RELAXATION_DECL_HPP
#define IFPACK2_RELAXATION_DECL_HPP
 
#include "Ifpack2_Preconditioner.hpp"
#include "Ifpack2_Details_CanChangeMatrix.hpp"
#include "Ifpack2_Parameters.hpp"
#include "Tpetra_Vector.hpp"
#include "Teuchos_ScalarTraits.hpp"
#include "Tpetra_CrsMatrix.hpp" // Don't need the definition here
#include "Tpetra_BlockCrsMatrix.hpp"
#include <type_traits>
#include <KokkosKernels_Handle.hpp>
 
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
namespace Ifpack2 {
namespace Details {
 
template<class TpetraOperatorType>
class ScaledDampedResidual; // forward declaration
 
} // namespace Details
} // namespace Ifpack2
 
namespace Teuchos {
  // forward declarations
  class ParameterList;
  class Time;
} // namespace Teuchos
#endif // DOXYGEN_SHOULD_SKIP_THIS
 
namespace Ifpack2 {
 
template<class MatrixType>
class Relaxation :
  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 typename MatrixType::scalar_type scalar_type;
 
  typedef typename MatrixType::local_ordinal_type local_ordinal_type;
 
  typedef typename MatrixType::global_ordinal_type global_ordinal_type;
 
  typedef typename MatrixType::node_type node_type;
 
  typedef typename Teuchos::ScalarTraits<scalar_type>::magnitudeType magnitude_type;
 
  typedef Tpetra::RowMatrix<scalar_type, local_ordinal_type,
                            global_ordinal_type, node_type> row_matrix_type;
 
  static_assert(std::is_same<MatrixType, row_matrix_type>::value, "Ifpack2::Relaxation: Please use MatrixType = Tpetra::RowMatrix.  This saves build times, library sizes, and executable sizes.  Don't worry, this class still works with CrsMatrix and BlockCrsMatrix; those are both subclasses of RowMatrix.");
 
 
 
  explicit Relaxation (const Teuchos::RCP<const row_matrix_type>& A);
 
  virtual ~Relaxation () = default;
 
 
 
  void setParameters (const Teuchos::ParameterList& params);
 
  Teuchos::RCP<const Teuchos::ParameterList>
  getValidParameters () const;
 
  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 Tpetra::Map<local_ordinal_type,global_ordinal_type,node_type> >
  getDomainMap () const;
 
  Teuchos::RCP<const Tpetra::Map<local_ordinal_type,global_ordinal_type,node_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;
 
 
 
  Teuchos::RCP<const Teuchos::Comm<int> > getComm() const;
 
  Teuchos::RCP<const row_matrix_type> getMatrix () 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;
 
  size_t getNodeSmootherComplexity() const;
 
 
 
  std::string description () const;
 
  void
  describe (Teuchos::FancyOStream &out,
            const Teuchos::EVerbosityLevel verbLevel =
            Teuchos::Describable::verbLevel_default) const;
 
private:
 
 
  typedef Teuchos::ScalarTraits<scalar_type> STS;
  typedef Teuchos::ScalarTraits<magnitude_type> STM;
 
  typedef Tpetra::CrsMatrix<scalar_type, local_ordinal_type,
                            global_ordinal_type, node_type> crs_matrix_type;
  typedef Tpetra::BlockCrsMatrix<scalar_type, local_ordinal_type,
                            global_ordinal_type, node_type> block_crs_matrix_type;
  typedef Tpetra::BlockMultiVector<scalar_type, local_ordinal_type,
                            global_ordinal_type, node_type> block_multivector_type;
 
 
 
 
  typedef typename crs_matrix_type::local_matrix_type local_matrix_type;
  typedef typename local_matrix_type::StaticCrsGraphType::row_map_type lno_row_view_t;
  typedef typename local_matrix_type::StaticCrsGraphType::entries_type lno_nonzero_view_t;
  typedef typename local_matrix_type::values_type scalar_nonzero_view_t;
  typedef typename local_matrix_type::StaticCrsGraphType::device_type TemporaryWorkSpace;
  typedef typename local_matrix_type::StaticCrsGraphType::device_type PersistentWorkSpace;
  typedef typename local_matrix_type::StaticCrsGraphType::execution_space MyExecSpace;
  typedef typename KokkosKernels::Experimental::KokkosKernelsHandle
      <typename lno_row_view_t::const_value_type, local_ordinal_type,typename scalar_nonzero_view_t::value_type,
      MyExecSpace, TemporaryWorkSpace,PersistentWorkSpace > mt_kernel_handle_type;
  Teuchos::RCP<mt_kernel_handle_type> mtKernelHandle_;
 
 
 
  Relaxation (const Relaxation<MatrixType>& RHS);
 
  Relaxation<MatrixType>& operator= (const Relaxation<MatrixType>& RHS);
 
 
 
  void setParametersImpl (Teuchos::ParameterList& params);
 
  void ApplyInverseJacobi(
        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) const;
 
  void ApplyInverseJacobi_BlockCrsMatrix(
        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) const;
 
  void ApplyInverseGS(
        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) const;
 
  void ApplyInverseMTGS_CrsMatrix(
          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) const;
 
 
  void ApplyInverseGS_RowMatrix(
        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) const;
 
  void
  ApplyInverseGS_CrsMatrix (const crs_matrix_type& A,
                            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) const;
 
  void
  ApplyInverseGS_BlockCrsMatrix (const block_crs_matrix_type& A,
                            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);
 
  void ApplyInverseSGS(
        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) const;
 
  void ApplyInverseMTSGS_CrsMatrix(
          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) const;
 
  void MTGaussSeidel (
      const Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& B,
      Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& X,
      const Tpetra::ESweepDirection direction) const;
 
  void ApplyInverseSGS_RowMatrix(
        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) const;
 
  void
  ApplyInverseSGS_CrsMatrix (const crs_matrix_type& A,
                             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) const;
 
  void
  ApplyInverseSGS_BlockCrsMatrix (const block_crs_matrix_type& A,
                             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);
 
  void computeBlockCrs ();
 
  void updateCachedMultiVector(const Teuchos::RCP<const Tpetra::Map<local_ordinal_type,global_ordinal_type,node_type> >& map, size_t numVecs) const;
 
 
 
 
  mutable Teuchos::RCP<const Teuchos::ParameterList> validParams_;
 
  Teuchos::RCP<const row_matrix_type> A_;
  Teuchos::RCP<const Tpetra::Import<local_ordinal_type,global_ordinal_type,node_type> > Importer_;
  Teuchos::RCP<Tpetra::Vector<scalar_type,local_ordinal_type,global_ordinal_type,node_type> > Diagonal_;
  mutable Teuchos::RCP<Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type> > cachedMV_;
 
  typedef Kokkos::View<typename block_crs_matrix_type::impl_scalar_type***,
                       typename block_crs_matrix_type::device_type> block_diag_type;
  typedef Kokkos::View<typename block_crs_matrix_type::impl_scalar_type***,
                       typename block_crs_matrix_type::device_type,
                       Kokkos::MemoryUnmanaged> unmanaged_block_diag_type;
 
  block_diag_type blockDiag_;
 
  Teuchos::RCP<block_multivector_type> yBlockColumnPointMap_;
 
  int NumSweeps_;
  Details::RelaxationType PrecType_;
  scalar_type DampingFactor_;
  bool IsParallel_;
  bool ZeroStartingSolution_;
  bool DoBackwardGS_;
  bool DoL1Method_;
  magnitude_type L1Eta_;
  scalar_type MinDiagonalValue_;
  bool fixTinyDiagEntries_;
  bool checkDiagEntries_;
 
  bool is_matrix_structurally_symmetric_;
 
  bool ifpack2_dump_matrix_;
 
 
  bool isInitialized_;
  bool IsComputed_;
  int NumInitialize_;
  int NumCompute_;
  mutable int NumApply_;
  double InitializeTime_;
  double ComputeTime_;
  mutable double ApplyTime_;
  double ComputeFlops_;
  mutable double ApplyFlops_;
 
  magnitude_type globalMinMagDiagEntryMag_;
  magnitude_type globalMaxMagDiagEntryMag_;
  size_t globalNumSmallDiagEntries_;
  size_t globalNumZeroDiagEntries_;
  size_t globalNumNegDiagEntries_;
  magnitude_type globalDiagNormDiff_;
 
  Kokkos::View<size_t*, typename node_type::device_type> diagOffsets_;
 
  bool savedDiagOffsets_;
 
  bool hasBlockCrsMatrix_;
 
  Teuchos::ArrayRCP<local_ordinal_type> localSmoothingIndices_;
 
}; //class Relaxation
 
}//namespace Ifpack2
 
#endif // IFPACK2_RELAXATION_DECL_HPP