Ifpack_Krylov: class for smoothing with Krylov solvers in Ifpack. More...

#include <Ifpack_Krylov.h>

Inheritance diagram for Ifpack_Krylov:

Public Member Functions
virtual int	SetUseTranspose (bool UseTranspose_in)

Private Types
typedef double	SC

typedef Epetra_MultiVector	MV

typedef Epetra_Operator	OP

typedef Epetra_RowMatrix	RM

	Ifpack_Krylov (Epetra_Operator *Matrix)

	Ifpack_Krylov (Epetra_RowMatrix *Matrix)
	Ifpack_Krylov constructor with given Epetra_Operator/Epetra_RowMatrix. More...

virtual	~Ifpack_Krylov ()
	Destructor. More...

virtual int	Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Applies the matrix to an Epetra_MultiVector. More...

virtual int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Applies the preconditioner to X, returns the result in Y. More...

virtual double	NormInf () const
	Returns the infinity norm of the global matrix (not implemented) More...

virtual const char *	Label () const

virtual bool	UseTranspose () const
	Returns the current UseTranspose setting. More...

virtual bool	HasNormInf () const
	Returns true if the this object can provide an approximate Inf-norm, false otherwise. More...

virtual const Epetra_Comm &	Comm () const
	Returns a pointer to the Epetra_Comm communicator associated with this operator. More...

virtual const Epetra_Map &	OperatorDomainMap () const
	Returns the Epetra_Map object associated with the domain of this operator. More...

virtual const Epetra_Map &	OperatorRangeMap () const
	Returns the Epetra_Map object associated with the range of this operator. More...

virtual int	Initialize ()
	Computes all it is necessary to initialize the preconditioner. More...

virtual bool	IsInitialized () const
	Returns true if the preconditioner has been successfully initialized, false otherwise. More...

virtual bool	IsComputed () const
	Returns `true` if the preconditioner has been successfully computed. More...

virtual int	Compute ()
	Computes the preconditioners. More...

virtual const Epetra_RowMatrix &	Matrix () const
	Returns a pointer to the matrix to be preconditioned. More...

virtual double	Condest (const Ifpack_CondestType CT=Ifpack_Cheap, const int MaxIters=1550, const double Tol=1e-9, Epetra_RowMatrix *Matrix_in=0)
	Computes the condition number estimates and returns the value. More...

virtual double	Condest () const
	Returns the condition number estimate, or -1.0 if not computed. More...

virtual int	SetParameters (Teuchos::ParameterList &List)
	Sets all the parameters for the preconditioner. More...

virtual std::ostream &	Print (std::ostream &os) const
	Prints object to an output stream. More...

virtual int	NumInitialize () const
	Returns the number of calls to Initialize(). More...

virtual int	NumCompute () const
	Returns the number of calls to Compute(). More...

virtual int	NumApplyInverse () const
	Returns the number of calls to ApplyInverse(). More...

virtual double	InitializeTime () const
	Returns the time spent in Initialize(). More...

virtual double	ComputeTime () const
	Returns the time spent in Compute(). More...

virtual double	ApplyInverseTime () const
	Returns the time spent in ApplyInverse(). More...

virtual double	InitializeFlops () const
	Returns the number of flops in the initialization phase. More...

virtual double	ComputeFlops () const
	Returns the number of flops in the computation phase. More...

virtual double	ApplyInverseFlops () const
	Returns the number of flops for the application of the preconditioner. More...

bool	IsInitialized_
	If `true`, the preconditioner has been computed successfully. More...

bool	IsComputed_
	If `true`, the preconditioner has been computed successfully. More...

int	NumInitialize_
	Contains the number of successful calls to Initialize(). More...

int	NumCompute_
	Contains the number of successful call to Compute(). More...

int	NumApplyInverse_
	Contains the number of successful call to ApplyInverse(). More...

double	InitializeTime_
	Contains the time for all successful calls to Initialize(). More...

double	ComputeTime_
	Contains the time for all successful calls to Compute(). More...

double	ApplyInverseTime_
	Contains the time for all successful calls to ApplyInverse(). More...

double	ComputeFlops_
	Contains the number of flops for Compute(). More...

double	ApplyInverseFlops_
	Contain sthe number of flops for ApplyInverse(). More...

virtual void	SetLabel ()
	Sets the label. More...

	Ifpack_Krylov (const Ifpack_Krylov &)
	Copy constructor (PRIVATE, should not be used) More...

Ifpack_Krylov &	operator= (const Ifpack_Krylov &)
	operator = (PRIVATE, should not be used) More...

int	Iterations_
	Max number of iterations. More...

double	Tolerance_
	Residual Tolerance. More...

int	SolverType_
	Solver - 0 for CG, 1 for GMRES. More...

int	PreconditionerType_
	Preconditioner - 0 for none, 1 for Jacobi, 2 for GS, 3 for SGS. More...

int	NumSweeps_
	Number of GS or Jacobi sweeps. More...

int	BlockSize_
	Block Size (for block relaxation) More...

double	DampingParameter_
	Damping parameter for inner preconditioner. More...

bool	UseTranspose_
	If true, use the tranpose of `Matrix_`. More...

double	Condest_
	Contains the estimated condition number. More...

std::string	Label_
	Contains the label of this object. More...

int	NumMyRows_
	Number of local rows. More...

int	NumMyNonzeros_
	Number of local nonzeros. More...

long long	NumGlobalRows_
	Number of global rows. More...

long long	NumGlobalNonzeros_
	Number of global nonzeros. More...

Teuchos::RefCountPtr < Epetra_Operator >	Operator_
	Pointers to the matrix as an Epetra_Operator. More...

Teuchos::RefCountPtr < Epetra_RowMatrix >	Matrix_
	Pointers to the matrix as an Epetra_RowMatrix. More...

bool	IsRowMatrix_
	If `true`, the Operator_ is an Epetra_RowMatrix. More...

Teuchos::RefCountPtr< Epetra_Time >	Time_
	Time object to track timing. More...

bool	ZeroStartingSolution_
	If `true`, the starting solution is always the zero vector. More...

Teuchos::RCP < Ifpack_Preconditioner >	IfpackPrec_

Detailed Description

Ifpack_Krylov: class for smoothing with Krylov solvers in Ifpack.

Definition at line 81 of file Ifpack_Krylov.h.

Member Typedef Documentation

typedef double Ifpack_Krylov::SC

private

Definition at line 83 of file Ifpack_Krylov.h.

typedef Epetra_MultiVector Ifpack_Krylov::MV

private

Definition at line 84 of file Ifpack_Krylov.h.

typedef Epetra_Operator Ifpack_Krylov::OP

private

Definition at line 85 of file Ifpack_Krylov.h.

typedef Epetra_RowMatrix Ifpack_Krylov::RM

private

Definition at line 86 of file Ifpack_Krylov.h.

Constructor & Destructor Documentation

Ifpack_Krylov::Ifpack_Krylov ( Epetra_Operator * Matrix )

Definition at line 68 of file Ifpack_Krylov.cpp.

Ifpack_Krylov::Ifpack_Krylov ( Epetra_RowMatrix * Matrix )

Ifpack_Krylov constructor with given Epetra_Operator/Epetra_RowMatrix.

Definition at line 110 of file Ifpack_Krylov.cpp.

virtual Ifpack_Krylov::~Ifpack_Krylov ( )

inlinevirtual

Destructor.

Definition at line 97 of file Ifpack_Krylov.h.

Ifpack_Krylov::Ifpack_Krylov ( const Ifpack_Krylov & )

inlineprivate

Copy constructor (PRIVATE, should not be used)

Definition at line 282 of file Ifpack_Krylov.h.

Member Function Documentation

virtual int Ifpack_Krylov::SetUseTranspose ( bool UseTranspose_in )

inlinevirtual

This flag can be used to apply the preconditioner to the transpose of the input operator.

Returns: Integer error code, set to 0 if successful. Set to -1 if this implementation does not support transpose.

Implements Epetra_Operator.

Definition at line 107 of file Ifpack_Krylov.h.

int Ifpack_Krylov::Apply	(	const Epetra_MultiVector &	X,
		Epetra_MultiVector &	Y
	)		const

inlinevirtual

Applies the matrix to an Epetra_MultiVector.

Parameters

X	- (In) A Epetra_MultiVector of dimension NumVectors to multiply with matrix.
Y	- (Out) A Epetra_MultiVector of dimension NumVectors containing the result.

Returns: Integer error code, set to 0 if successful.

Implements Epetra_Operator.

Definition at line 178 of file Ifpack_Krylov.cpp.

int Ifpack_Krylov::ApplyInverse	(	const Epetra_MultiVector &	X,
		Epetra_MultiVector &	Y
	)		const

virtual

Applies the preconditioner to X, returns the result in Y.

Parameters

X	- (In) A Epetra_MultiVector of dimension NumVectors to be preconditioned.
Y	- (InOut) A Epetra_MultiVector of dimension NumVectors containing result.

Returns: Integer error code, set to 0 if successful.

Warning: This routine is NOT AztecOO complaint.

Implements Ifpack_Preconditioner.

Definition at line 380 of file Ifpack_Krylov.cpp.

virtual double Ifpack_Krylov::NormInf ( ) const

inlinevirtual

Returns the infinity norm of the global matrix (not implemented)

Implements Epetra_Operator.

Definition at line 142 of file Ifpack_Krylov.h.

virtual const char* Ifpack_Krylov::Label ( ) const

inlinevirtual

Implements Epetra_Operator.

Definition at line 150 of file Ifpack_Krylov.h.

virtual bool Ifpack_Krylov::UseTranspose ( ) const

inlinevirtual

Returns the current UseTranspose setting.

Implements Epetra_Operator.

Definition at line 156 of file Ifpack_Krylov.h.

virtual bool Ifpack_Krylov::HasNormInf ( ) const

inlinevirtual

Returns true if the this object can provide an approximate Inf-norm, false otherwise.

Implements Epetra_Operator.

Definition at line 162 of file Ifpack_Krylov.h.

const Epetra_Comm & Ifpack_Krylov::Comm ( ) const

virtual

Returns a pointer to the Epetra_Comm communicator associated with this operator.

Implements Epetra_Operator.

Definition at line 159 of file Ifpack_Krylov.cpp.

const Epetra_Map & Ifpack_Krylov::OperatorDomainMap ( ) const

virtual

Returns the Epetra_Map object associated with the domain of this operator.

Implements Epetra_Operator.

Definition at line 165 of file Ifpack_Krylov.cpp.

const Epetra_Map & Ifpack_Krylov::OperatorRangeMap ( ) const

virtual

Returns the Epetra_Map object associated with the range of this operator.

Implements Epetra_Operator.

Definition at line 171 of file Ifpack_Krylov.cpp.

int Ifpack_Krylov::Initialize ( )

virtual

Computes all it is necessary to initialize the preconditioner.

Implements Ifpack_Preconditioner.

Definition at line 199 of file Ifpack_Krylov.cpp.

virtual bool Ifpack_Krylov::IsInitialized ( ) const

inlinevirtual

Returns true if the preconditioner has been successfully initialized, false otherwise.

Implements Ifpack_Preconditioner.

Definition at line 178 of file Ifpack_Krylov.h.

virtual bool Ifpack_Krylov::IsComputed ( ) const

inlinevirtual

Returns true if the preconditioner has been successfully computed.

Implements Ifpack_Preconditioner.

Definition at line 184 of file Ifpack_Krylov.h.

int Ifpack_Krylov::Compute ( )

virtual

Computes the preconditioners.

Implements Ifpack_Preconditioner.

Definition at line 233 of file Ifpack_Krylov.cpp.

virtual const Epetra_RowMatrix& Ifpack_Krylov::Matrix ( ) const

inlinevirtual

Returns a pointer to the matrix to be preconditioned.

Implements Ifpack_Preconditioner.

Definition at line 192 of file Ifpack_Krylov.h.

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

virtual

Computes the condition number estimates and returns the value.

Implements Ifpack_Preconditioner.

Definition at line 358 of file Ifpack_Krylov.cpp.

virtual double Ifpack_Krylov::Condest ( ) const

inlinevirtual

Returns the condition number estimate, or -1.0 if not computed.

Implements Ifpack_Preconditioner.

Definition at line 204 of file Ifpack_Krylov.h.

int Ifpack_Krylov::SetParameters ( Teuchos::ParameterList & List )

virtual

Sets all the parameters for the preconditioner.

Implements Ifpack_Preconditioner.

Definition at line 144 of file Ifpack_Krylov.cpp.

std::ostream & Ifpack_Krylov::Print ( std::ostream & os ) const

virtual

Prints object to an output stream.

Implements Ifpack_Preconditioner.

Definition at line 310 of file Ifpack_Krylov.cpp.

virtual int Ifpack_Krylov::NumInitialize ( ) const

inlinevirtual

Returns the number of calls to Initialize().

Implements Ifpack_Preconditioner.

Definition at line 220 of file Ifpack_Krylov.h.

virtual int Ifpack_Krylov::NumCompute ( ) const

inlinevirtual

Returns the number of calls to Compute().

Implements Ifpack_Preconditioner.

Definition at line 226 of file Ifpack_Krylov.h.

virtual int Ifpack_Krylov::NumApplyInverse ( ) const

inlinevirtual

Returns the number of calls to ApplyInverse().

Implements Ifpack_Preconditioner.

Definition at line 232 of file Ifpack_Krylov.h.

virtual double Ifpack_Krylov::InitializeTime ( ) const

inlinevirtual

Returns the time spent in Initialize().

Implements Ifpack_Preconditioner.

Definition at line 238 of file Ifpack_Krylov.h.

virtual double Ifpack_Krylov::ComputeTime ( ) const

inlinevirtual

Returns the time spent in Compute().

Implements Ifpack_Preconditioner.

Definition at line 244 of file Ifpack_Krylov.h.

virtual double Ifpack_Krylov::ApplyInverseTime ( ) const

inlinevirtual

Returns the time spent in ApplyInverse().

Implements Ifpack_Preconditioner.

Definition at line 250 of file Ifpack_Krylov.h.

virtual double Ifpack_Krylov::InitializeFlops ( ) const

inlinevirtual

Returns the number of flops in the initialization phase.

Implements Ifpack_Preconditioner.

Definition at line 256 of file Ifpack_Krylov.h.

virtual double Ifpack_Krylov::ComputeFlops ( ) const

inlinevirtual

Returns the number of flops in the computation phase.

Implements Ifpack_Preconditioner.

Definition at line 262 of file Ifpack_Krylov.h.

virtual double Ifpack_Krylov::ApplyInverseFlops ( ) const

inlinevirtual

Returns the number of flops for the application of the preconditioner.

Implements Ifpack_Preconditioner.

Definition at line 268 of file Ifpack_Krylov.h.

void Ifpack_Krylov::SetLabel ( )

privatevirtual

Sets the label.

Definition at line 373 of file Ifpack_Krylov.cpp.

Ifpack_Krylov& Ifpack_Krylov::operator= ( const Ifpack_Krylov & )

inlineprivate

operator = (PRIVATE, should not be used)

Definition at line 286 of file Ifpack_Krylov.h.

Member Data Documentation

bool Ifpack_Krylov::IsInitialized_

private

If true, the preconditioner has been computed successfully.

Definition at line 293 of file Ifpack_Krylov.h.

bool Ifpack_Krylov::IsComputed_

private

If true, the preconditioner has been computed successfully.

Definition at line 295 of file Ifpack_Krylov.h.

int Ifpack_Krylov::NumInitialize_

private

Contains the number of successful calls to Initialize().

Definition at line 297 of file Ifpack_Krylov.h.

int Ifpack_Krylov::NumCompute_

private

Contains the number of successful call to Compute().

Definition at line 299 of file Ifpack_Krylov.h.

int Ifpack_Krylov::NumApplyInverse_

mutableprivate

Contains the number of successful call to ApplyInverse().

Definition at line 301 of file Ifpack_Krylov.h.

double Ifpack_Krylov::InitializeTime_

private

Contains the time for all successful calls to Initialize().

Definition at line 303 of file Ifpack_Krylov.h.

double Ifpack_Krylov::ComputeTime_

private

Contains the time for all successful calls to Compute().

Definition at line 305 of file Ifpack_Krylov.h.

double Ifpack_Krylov::ApplyInverseTime_

mutableprivate

Contains the time for all successful calls to ApplyInverse().

Definition at line 307 of file Ifpack_Krylov.h.

double Ifpack_Krylov::ComputeFlops_

private

Contains the number of flops for Compute().

Definition at line 309 of file Ifpack_Krylov.h.

double Ifpack_Krylov::ApplyInverseFlops_

mutableprivate

Contain sthe number of flops for ApplyInverse().

Definition at line 311 of file Ifpack_Krylov.h.

int Ifpack_Krylov::Iterations_

private

Max number of iterations.

Definition at line 316 of file Ifpack_Krylov.h.

double Ifpack_Krylov::Tolerance_

private

Residual Tolerance.

Definition at line 318 of file Ifpack_Krylov.h.

int Ifpack_Krylov::SolverType_

private

Solver - 0 for CG, 1 for GMRES.

Definition at line 320 of file Ifpack_Krylov.h.

int Ifpack_Krylov::PreconditionerType_

private

Preconditioner - 0 for none, 1 for Jacobi, 2 for GS, 3 for SGS.

Definition at line 322 of file Ifpack_Krylov.h.

int Ifpack_Krylov::NumSweeps_

private

Number of GS or Jacobi sweeps.

Definition at line 324 of file Ifpack_Krylov.h.

int Ifpack_Krylov::BlockSize_

private

Block Size (for block relaxation)

Definition at line 326 of file Ifpack_Krylov.h.

double Ifpack_Krylov::DampingParameter_

private

Damping parameter for inner preconditioner.

Definition at line 328 of file Ifpack_Krylov.h.

bool Ifpack_Krylov::UseTranspose_

private

If true, use the tranpose of Matrix_.

Definition at line 330 of file Ifpack_Krylov.h.

double Ifpack_Krylov::Condest_

private

Contains the estimated condition number.

Definition at line 332 of file Ifpack_Krylov.h.

std::string Ifpack_Krylov::Label_

private

Contains the label of this object.

Definition at line 340 of file Ifpack_Krylov.h.

int Ifpack_Krylov::NumMyRows_

private

Number of local rows.

Definition at line 344 of file Ifpack_Krylov.h.

int Ifpack_Krylov::NumMyNonzeros_

private

Number of local nonzeros.

Definition at line 346 of file Ifpack_Krylov.h.

long long Ifpack_Krylov::NumGlobalRows_

private

Number of global rows.

Definition at line 348 of file Ifpack_Krylov.h.

long long Ifpack_Krylov::NumGlobalNonzeros_

private

Number of global nonzeros.

Definition at line 350 of file Ifpack_Krylov.h.

Teuchos::RefCountPtr<Epetra_Operator> Ifpack_Krylov::Operator_

private

Pointers to the matrix as an Epetra_Operator.

Definition at line 352 of file Ifpack_Krylov.h.

Teuchos::RefCountPtr<Epetra_RowMatrix> Ifpack_Krylov::Matrix_

private

Pointers to the matrix as an Epetra_RowMatrix.

Definition at line 354 of file Ifpack_Krylov.h.

bool Ifpack_Krylov::IsRowMatrix_

private

If true, the Operator_ is an Epetra_RowMatrix.

Definition at line 357 of file Ifpack_Krylov.h.

Teuchos::RefCountPtr<Epetra_Time> Ifpack_Krylov::Time_

private

Time object to track timing.

Definition at line 359 of file Ifpack_Krylov.h.

bool Ifpack_Krylov::ZeroStartingSolution_

private

If true, the starting solution is always the zero vector.

Definition at line 361 of file Ifpack_Krylov.h.

Teuchos::RCP<Ifpack_Preconditioner> Ifpack_Krylov::IfpackPrec_

private

Definition at line 369 of file Ifpack_Krylov.h.

The documentation for this class was generated from the following files:

Public Member Functions

Private Types

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation