Epetra_FastCrsOperator: A class for constructing matrix objects optimized for common kernels. More...

#include <Epetra_FastCrsMatrix.h>

Inheritance diagram for Epetra_FastCrsOperator:

Collaboration diagram for Epetra_FastCrsOperator:

Public Member Functions
Constructors/Destructor
	Epetra_FastCrsOperator (const Epetra_CrsMatrix &Matrix, bool UseFloats=false)
	Epetra_FastCrsOperator constuctor.

virtual	~Epetra_FastCrsOperator ()
	Epetra_FastCrsOperator Destructor.

Post-construction modifications
int	UpdateValues (const Epetra_CrsMatrix &Matrix)
	Update values using a matrix with identical structure.

Additional methods required to support the Epetra_Operator interface
char *	Label () const
	Returns a character string describing the operator.

int	SetUseTranspose (bool UseTranspose)
	If set true, transpose of this operator will be applied. More...

double	NormInf () const
	Returns the infinity norm of the global matrix.

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

int	Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of a Epetra_Operator applied to a Epetra_MultiVector X in Y. More...

int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Returns the result of a Epetra_Operator inverse applied to an Epetra_MultiVector X in Y. More...

bool	HasNormInf () const
	Returns true because this class can compute an Inf-norm.

bool	UseTranspose () const
	Returns the current UseTranspose setting.

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

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

Public Member Functions inherited from Epetra_CompObject
Epetra_CompObject &	operator= (const Epetra_CompObject &src)

	Epetra_CompObject ()
	Basic Epetra_CompObject constuctor.

	Epetra_CompObject (const Epetra_CompObject &Source)
	Epetra_CompObject copy constructor.

virtual	~Epetra_CompObject ()
	Epetra_CompObject destructor.

void	SetFlopCounter (const Epetra_Flops &FlopCounter_in)
	Set the internal Epetra_Flops() pointer.

void	SetFlopCounter (const Epetra_CompObject &CompObject)
	Set the internal Epetra_Flops() pointer to the flop counter of another Epetra_CompObject.

void	UnsetFlopCounter ()
	Set the internal Epetra_Flops() pointer to 0 (no flops counted).

Epetra_Flops *	GetFlopCounter () const
	Get the pointer to the Epetra_Flops() object associated with this object, returns 0 if none.

void	ResetFlops () const
	Resets the number of floating point operations to zero for this multi-vector.

double	Flops () const
	Returns the number of floating point operations with this multi-vector.

void	UpdateFlops (int Flops_in) const
	Increment Flop count for this object.

void	UpdateFlops (long int Flops_in) const
	Increment Flop count for this object.

void	UpdateFlops (long long Flops_in) const
	Increment Flop count for this object.

void	UpdateFlops (double Flops_in) const
	Increment Flop count for this object.

void	UpdateFlops (float Flops_in) const
	Increment Flop count for this object.

Public Member Functions inherited from Epetra_Operator
virtual	~Epetra_Operator ()
	Destructor.

Protected Member Functions
int	Allocate (bool UseFloats)

Protected Attributes
const Epetra_CrsMatrix &	CrsMatrix_

int	NumMyRows_

int	NumMyNonzeros_

double *	Values_

float *	FloatValues_

int *	Indices_

unsigned short *	ShortIndices_

bool	UsingFloats_

bool	UsingShorts_

bool	ValuesAllocated_

Epetra_MultiVector *	ImportVector_

Epetra_MultiVector *	ExportVector_

Protected Attributes inherited from Epetra_CompObject
Epetra_Flops *	FlopCounter_

Detailed Description

Epetra_FastCrsOperator: A class for constructing matrix objects optimized for common kernels.

The Epetra_FastCrsOperator class takes an existing Epetra_CrsMatrix object, analyzes it and builds upon it for the purposes of obtaining the best possible performance on basic operations.

Member Function Documentation

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

virtual

Returns the result of a Epetra_Operator applied to a Epetra_MultiVector X in Y.

Parameters

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

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

Implements Epetra_Operator.

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

virtual

Returns the result of a Epetra_Operator inverse applied to an Epetra_MultiVector X in Y.

Parameters

X	(In) - A Epetra_MultiVector of dimension NumVectors to solve for.
Y	(Out) - A Epetra_MultiVector of dimension NumVectors containing result.

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

Implements Epetra_Operator.

int Epetra_FastCrsOperator::SetUseTranspose ( bool UseTranspose )

inlinevirtual

If set true, transpose of this operator will be applied.

This flag allows the transpose of the given operator to be used implicitly.  Setting this flag
affects only the Apply() and ApplyInverse() methods.  If the implementation of this interface
does not support transpose use, this method should return a value of -1.

Parameters

In	UseTranspose -If true, multiply by the transpose of operator, otherwise just use operator.

Returns: Always returns 0.

Implements Epetra_Operator.

References Epetra_CrsMatrix::SetUseTranspose().

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

Epetra_FastCrsMatrix.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation