Implemantation of ILU (Incomplete LU) Preconditioner. More...

#include <iluprecond.h>

Inheritance diagram for oofem::CompCol_ILUPreconditioner:

Collaboration diagram for oofem::CompCol_ILUPreconditioner:

Public Member Functions
	CompCol_ILUPreconditioner (const SparseMtrx &A, InputRecord &attributes)
	Constructor. Initializes the the receiver (constructs the precontioning matrix M) of given matrix. More...

	CompCol_ILUPreconditioner ()
	Constructor. The user should call initializeFrom and init services in this given order to ensure consistency. More...

virtual	~CompCol_ILUPreconditioner (void)
	Destructor. More...

virtual void	init (const SparseMtrx &)
	Initializes the receiver (constructs the preconditioning matrix M) of given matrix. More...

void	initialize (const CompCol &A)

void	initialize (const DynCompCol &A)

void	solve (const FloatArray &x, FloatArray &y) const
	Solves the linear system. More...

void	trans_solve (const FloatArray &x, FloatArray &y) const
	Solves the transposed system. More...

virtual const char *	giveClassName () const
	Returns the preconditioner name. More...

virtual IRResultType	initializeFrom (InputRecord *ir)
	Initializes receiver from given record. Empty implementation. More...

Public Member Functions inherited from oofem::Preconditioner
	Preconditioner (const SparseMtrx &a, InputRecord &attributes)
	Constructor. More...

	Preconditioner ()
	Constructor. More...

virtual	~Preconditioner (void)
	Destructor. More...

FloatArray	solve (const FloatArray &rhs) const
	Solves the linear system. More...

FloatArray	trans_solve (const FloatArray &rhs) const
	Solves transposed system. More...

Protected Member Functions
void	qsortRow (IntArray &, FloatArray &, int l, int r)

int	qsortRowPartition (IntArray &, FloatArray &, int l, int r)

Private Attributes
FloatArray	l_val_

IntArray	l_colptr_

IntArray	l_rowind_

int	l_nz_

FloatArray	u_val_

IntArray	u_colptr_

IntArray	u_rowind_

int	u_nz_

int	dim_ [2]

Detailed Description

Implemantation of ILU (Incomplete LU) Preconditioner.

No fill-up - ILU(0).

Definition at line 45 of file iluprecond.h.

Constructor & Destructor Documentation

oofem::CompCol_ILUPreconditioner::CompCol_ILUPreconditioner	(	const SparseMtrx &	A,
		InputRecord &	attributes
	)

Constructor. Initializes the the receiver (constructs the precontioning matrix M) of given matrix.

Definition at line 47 of file iluprecond.C.

oofem::CompCol_ILUPreconditioner::CompCol_ILUPreconditioner ( )

inline

Constructor. The user should call initializeFrom and init services in this given order to ensure consistency.

Definition at line 64 of file iluprecond.h.

virtual oofem::CompCol_ILUPreconditioner::~CompCol_ILUPreconditioner ( void )

inlinevirtual

Destructor.

Definition at line 66 of file iluprecond.h.

Member Function Documentation

virtual const char* oofem::CompCol_ILUPreconditioner::giveClassName ( ) const

inlinevirtual

Returns the preconditioner name.

Reimplemented from oofem::Preconditioner.

Definition at line 76 of file iluprecond.h.

void oofem::CompCol_ILUPreconditioner::init ( const SparseMtrx & a )

virtual

Initializes the receiver (constructs the preconditioning matrix M) of given matrix.

Virtual service, to be implemented by derived classes. Should be called after initializeFrom service.

Parameters

a	Sparse matrix to be preconditioned.

Reimplemented from oofem::Preconditioner.

Definition at line 58 of file iluprecond.C.

References oofem::Timer::getUtime(), initialize(), OOFEM_ERROR, OOFEM_LOG_INFO, oofem::Timer::startTimer(), and oofem::Timer::stopTimer().

void oofem::CompCol_ILUPreconditioner::initialize ( const CompCol & A )

Definition at line 81 of file iluprecond.C.

References oofem::CompCol::col_ptr(), oofem::CompCol::dim(), dim_, oofem::SparseMtrx::giveNumberOfColumns(), oofem::SparseMtrx::giveNumberOfRows(), l_colptr_, l_nz_, l_rowind_, l_val_, oofem::IntArray::resize(), oofem::FloatArray::resize(), oofem::CompCol::row_ind(), u_colptr_, u_nz_, u_rowind_, u_val_, and oofem::CompCol::val().

Referenced by init().

void oofem::CompCol_ILUPreconditioner::initialize ( const DynCompCol & A )

IRResultType oofem::CompCol_ILUPreconditioner::initializeFrom ( InputRecord * ir )

virtual

Initializes receiver from given record. Empty implementation.

Reimplemented from oofem::Preconditioner.

Definition at line 51 of file iluprecond.C.

References oofem::Preconditioner::initializeFrom().

void oofem::CompCol_ILUPreconditioner::qsortRow	(	IntArray &	src,
		FloatArray &	val,
		int	l,
		int	r
	)

protected

Definition at line 379 of file iluprecond.C.

References qsortRowPartition().

Referenced by initialize().

int oofem::CompCol_ILUPreconditioner::qsortRowPartition	(	IntArray &	src,
		FloatArray &	val,
		int	l,
		int	r
	)

protected

Definition at line 392 of file iluprecond.C.

Referenced by qsortRow().

void oofem::CompCol_ILUPreconditioner::solve	(	const FloatArray &	rhs,
		FloatArray &	solution
	)		const

virtual

Solves the linear system.

Parameters

rhs	Right hand side.
solution	Solution.

Implements oofem::Preconditioner.

Definition at line 312 of file iluprecond.C.

References oofem::FloatArray::giveSize(), l_colptr_, l_rowind_, l_val_, oofem::FloatArray::resize(), u_colptr_, u_rowind_, u_val_, and oofem::FloatArray::zero().

void oofem::CompCol_ILUPreconditioner::trans_solve	(	const FloatArray &	rhs,
		FloatArray &	solution
	)		const

virtual

Solves the transposed system.

Parameters

rhs	Right hand side.
solution	Solution.

Implements oofem::Preconditioner.

Definition at line 343 of file iluprecond.C.

References oofem::FloatArray::at(), oofem::FloatArray::giveSize(), l_colptr_, l_rowind_, l_val_, oofem::FloatArray::resize(), u_colptr_, u_rowind_, and u_val_.

Member Data Documentation

int oofem::CompCol_ILUPreconditioner::dim_[2]

private

Definition at line 58 of file iluprecond.h.

Referenced by initialize().

IntArray oofem::CompCol_ILUPreconditioner::l_colptr_

private

Definition at line 49 of file iluprecond.h.

Referenced by initialize(), solve(), and trans_solve().

int oofem::CompCol_ILUPreconditioner::l_nz_

private

Definition at line 51 of file iluprecond.h.

Referenced by initialize().

IntArray oofem::CompCol_ILUPreconditioner::l_rowind_

private

Definition at line 50 of file iluprecond.h.

Referenced by initialize(), solve(), and trans_solve().

FloatArray oofem::CompCol_ILUPreconditioner::l_val_

private

Definition at line 48 of file iluprecond.h.

Referenced by initialize(), solve(), and trans_solve().

IntArray oofem::CompCol_ILUPreconditioner::u_colptr_

private

Definition at line 54 of file iluprecond.h.

Referenced by initialize(), solve(), and trans_solve().

int oofem::CompCol_ILUPreconditioner::u_nz_

private

Definition at line 56 of file iluprecond.h.

Referenced by initialize().

IntArray oofem::CompCol_ILUPreconditioner::u_rowind_

private

Definition at line 55 of file iluprecond.h.

Referenced by initialize(), solve(), and trans_solve().

FloatArray oofem::CompCol_ILUPreconditioner::u_val_

private

Definition at line 53 of file iluprecond.h.

Referenced by initialize(), solve(), and trans_solve().

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

Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation