#include <pilut.h>

Inheritance diagram for ug::PILUTPreconditioner< TAlgebra >:

Public Types
typedef TAlgebra	algebra_type

typedef IPreconditioner< TAlgebra >::matrix_operator_type	matrix_operator_type
	Matrix Operator type. More...

typedef TAlgebra::matrix_type	matrix_type

typedef TAlgebra::vector_type	vector_type

Public Types inherited from ug::IPreconditioner< TAlgebra >
typedef TAlgebra	algebra_type
	Algebra type. More...

typedef MatrixOperator< matrix_type, vector_type >	matrix_operator_type
	Matrix Operator type. More...

typedef TAlgebra::matrix_type	matrix_type
	Matrix type. More...

typedef TAlgebra::vector_type	vector_type
	Vector type. More...

Public Types inherited from ug::ILinearIterator< TAlgebra::vector_type >
typedef TAlgebra::vector_type	codomain_function_type
	Range space. More...

typedef TAlgebra::vector_type	domain_function_type
	Domain space. More...

Public Types inherited from ug::DebugWritingObject< TAlgebra >
typedef TAlgebra	algebra_type
	type of algebra More...

typedef TAlgebra::matrix_type	matrix_type
	type of matrix More...

typedef TAlgebra::vector_type	vector_type
	type of vector More...

Public Types inherited from ug::VectorDebugWritingObject< TAlgebra::vector_type >
typedef TAlgebra::vector_type	vector_type
	type of vector More...

Public Member Functions
SmartPtr< ILinearIterator< vector_type > >	clone ()
	clone More...

	PILUTPreconditioner (double eps=0)

void	set_info (bool info)
	sets storage information output to true or false More...

void	set_show_progress (bool s)
	set whether the progress meter should be shown More...

void	set_threshold (number thresh)
	sets threshold for incomplete LU factorisation (added 01122010ih) More...

virtual	~PILUTPreconditioner ()

Public Member Functions inherited from ug::IPreconditioner< TAlgebra >
virtual bool	apply (vector_type &c, const vector_type &d)
	compute new correction c = B*d More...

virtual bool	apply_update_defect (vector_type &c, vector_type &d)
	compute new correction c = Bd and update defect d:= d - Lc More...

SmartPtr< MatrixOperator< matrix_type, vector_type > >	approx_operator ()
	underlying matrix based operator used for the preconditioner More...

SmartPtr< MatrixOperator< matrix_type, vector_type > >	defect_operator ()
	underlying matrix based operator for calculation of defect More...

virtual bool	init (SmartPtr< ILinearOperator< vector_type > > J, const vector_type &u)
	implements the ILinearIterator-interface for matrix based preconditioner More...

bool	init (SmartPtr< ILinearOperator< vector_type > > L)
	implements the ILinearIterator-interface for matrix based preconditioner More...

bool	init (SmartPtr< MatrixOperator< matrix_type, vector_type > > Op)
	initializes the preconditioner for a matrix based operator More...

	IPreconditioner ()
	default constructor More...

	IPreconditioner (const IPreconditioner< TAlgebra > &parent)
	clone constructor More...

	IPreconditioner (SmartPtr< IDebugWriter< algebra_type > > spDebugWriter)
	constructor setting debug writer More...

virtual void	set_approximation (SmartPtr< MatrixOperator< matrix_type, vector_type > > approx)

virtual	~IPreconditioner ()
	virtual destructor More...

Public Member Functions inherited from ug::ILinearIterator< TAlgebra::vector_type >
virtual std::string	config_string () const

SmartPtr< IDamping< TAlgebra::vector_type, TAlgebra::vector_type > >	damping ()
	returns the scaling More...

	ILinearIterator ()
	constructor More...

	ILinearIterator (const ILinearIterator< TAlgebra::vector_type, TAlgebra::vector_type > &parent)
	copy constructor More...

virtual bool	init (SmartPtr< ILinearOperator< TAlgebra::vector_type, TAlgebra::vector_type > > J, const TAlgebra::vector_type &u)=0
	initialize for operator J(u) and linearization point u More...

virtual bool	init (SmartPtr< ILinearOperator< TAlgebra::vector_type, TAlgebra::vector_type > > L)=0
	initialize for linear operator L More...

void	set_damp (number factor)
	sets the damping to a constant factor More...

void	set_damp (SmartPtr< IDamping< TAlgebra::vector_type, TAlgebra::vector_type > > spScaling)
	sets a scaling for the correction More...

virtual bool	supports_parallel () const=0
	returns if parallel solving is supported More...

virtual	~ILinearIterator ()
	virtual destructor More...

Public Member Functions inherited from ug::DebugWritingObject< TAlgebra >
SmartPtr< IDebugWriter< algebra_type > >	debug_writer ()
	returns the debug writer More...

ConstSmartPtr< IDebugWriter< algebra_type > >	debug_writer () const

bool	debug_writer_valid () const
	returns true if the debug writer is set More...

	DebugWritingObject ()

	DebugWritingObject (const DebugWritingObject< algebra_type > &parent)
	clone constructor More...

	DebugWritingObject (SmartPtr< IDebugWriter< algebra_type > > spDebugWriter)

virtual void	set_debug (SmartPtr< IDebugWriter< algebra_type > > spDebugWriter)
	set debug writer More...

virtual	~DebugWritingObject ()
	virtual destructor More...

Public Member Functions inherited from ug::VectorDebugWritingObject< TAlgebra::vector_type >
virtual void	set_debug (SmartPtr< IVectorDebugWriter< vector_type > > spDebugWriter)
	set debug writer More...

SmartPtr< IVectorDebugWriter< vector_type > >	vector_debug_writer ()
	returns the debug writer More...

ConstSmartPtr< IVectorDebugWriter< vector_type > >	vector_debug_writer () const

bool	vector_debug_writer_valid () const
	returns true if the debug writer is set More...

	VectorDebugWritingObject ()

	VectorDebugWritingObject (SmartPtr< IVectorDebugWriter< vector_type > > spDebugWriter)

void	write_debug (const vector_type &vec, const char *filename)
	writing debug output for a vector (if debug writer set) More...

virtual	~VectorDebugWritingObject ()
	virtual destructor More...

Protected Member Functions
size_t	eliminate_row (std::vector< typename matrix_type::connection > &con, size_t start, size_t stop, double dmax)

virtual const char *	name () const
	returns the name of iterator More...

virtual bool	postprocess ()
	cleans the operator More...

virtual bool	preprocess (SmartPtr< MatrixOperator< matrix_type, vector_type > > pOp)
	initializes the preconditioner More...

virtual bool	step (SmartPtr< MatrixOperator< matrix_type, vector_type > > pOp, vector_type &c, const vector_type &d)
	computes a new correction c = B*d More...

Protected Member Functions inherited from ug::DebugWritingObject< TAlgebra >
void	enter_debug_writer_section (const char *secDir)
	enters a debugging section More...

void	enter_debug_writer_section (std::string secDir)
	enters a debugging section More...

void	leave_debug_writer_section ()
	leaves a debugging section More...

void	write_debug (const matrix_type &mat, const char *filename)
	write debug output for a matrix (if debug writer set) More...

void	write_debug (const matrix_type &mat, std::string name)
	write debug output for a matrix (if debug writer set) More...

Protected Member Functions inherited from ug::VectorDebugWritingObject< TAlgebra::vector_type >
void	enter_vector_debug_writer_section (const char *secDir)
	enters a debugging section More...

void	enter_vector_debug_writer_section (std::string secDir)
	enters a debugging section More...

void	leave_vector_debug_writer_section ()
	leaves a debugging section More...

void	print_debugger_message (const char *msg)
	prints a debugger message (listing all the sections) More...

void	print_debugger_message (std::string msg)
	prints a debugger message (listing all the sections) More...

virtual void	write_debug (const vector_type &vec, std::string name)
	writing debug output for a vector (if debug writer set) More...

Protected Attributes
double	m_eps

bool	m_info

matrix_type	m_L

bool	m_show_progress

matrix_type	m_U

Protected Attributes inherited from ug::IPreconditioner< TAlgebra >
bool	m_bInit
	init flag indicating if init has been called More...

bool	m_bOtherApproxOperator

SmartPtr< MatrixOperator< matrix_type, vector_type > >	m_spApproxOperator
	underlying matrix based operator used for the preconditioner More...

SmartPtr< ILinearOperator< vector_type > >	m_spDefectOperator
	underlying matrix based operator for calculation of defect More...

Protected Attributes inherited from ug::ILinearIterator< TAlgebra::vector_type >
SmartPtr< IDamping< TAlgebra::vector_type, TAlgebra::vector_type > >	m_spDamping
	the scaling More...

Protected Attributes inherited from ug::DebugWritingObject< TAlgebra >
SmartPtr< IDebugWriter< algebra_type > >	m_spDebugWriter
	Debug Writer. More...

Protected Attributes inherited from ug::VectorDebugWritingObject< TAlgebra::vector_type >
SmartPtr< IVectorDebugWriter< vector_type > >	m_spVectorDebugWriter
	Debug Writer. More...

Static Protected Attributes
static const number	m_small = 1e-8

Private Types
typedef matrix_type::value_type	block_type

Member Typedef Documentation

◆ algebra_type

template<typename TAlgebra >

typedef TAlgebra ug::PILUTPreconditioner< TAlgebra >::algebra_type

◆ block_type

template<typename TAlgebra >

typedef matrix_type::value_type ug::PILUTPreconditioner< TAlgebra >::block_type

private

◆ matrix_operator_type

template<typename TAlgebra >

typedef IPreconditioner<TAlgebra>::matrix_operator_type ug::PILUTPreconditioner< TAlgebra >::matrix_operator_type

Matrix Operator type.

◆ matrix_type

template<typename TAlgebra >

typedef TAlgebra::matrix_type ug::PILUTPreconditioner< TAlgebra >::matrix_type

◆ vector_type

template<typename TAlgebra >

typedef TAlgebra::vector_type ug::PILUTPreconditioner< TAlgebra >::vector_type

Constructor & Destructor Documentation

◆ PILUTPreconditioner()

template<typename TAlgebra >

ug::PILUTPreconditioner< TAlgebra >::PILUTPreconditioner ( double eps = 0 )

inline

◆ ~PILUTPreconditioner()

template<typename TAlgebra >

virtual ug::PILUTPreconditioner< TAlgebra >::~PILUTPreconditioner ( )

inlinevirtual

Member Function Documentation

◆ clone()

template<typename TAlgebra >

SmartPtr<ILinearIterator<vector_type> > ug::PILUTPreconditioner< TAlgebra >::clone ( )

inlinevirtual

clone

Implements ug::ILinearIterator< TAlgebra::vector_type >.

References ug::ILinearIterator< TAlgebra::vector_type >::damping(), ug::DebugWritingObject< TAlgebra >::debug_writer(), ug::PILUTPreconditioner< TAlgebra >::m_eps, and ug::PILUTPreconditioner< TAlgebra >::m_info.

◆ eliminate_row()

template<typename TAlgebra >

size_t ug::PILUTPreconditioner< TAlgebra >::eliminate_row	(	std::vector< typename matrix_type::connection > &	con,
		size_t	start,
		size_t	stop,
		double	dmax
	)

inlineprotected

References ug::BlockNorm(), ug::PILUTPreconditioner< TAlgebra >::m_eps, ug::PILUTPreconditioner< TAlgebra >::m_U, and UG_ASSERT.

Referenced by ug::PILUTPreconditioner< TAlgebra >::preprocess().

◆ name()

template<typename TAlgebra >

virtual const char* ug::PILUTPreconditioner< TAlgebra >::name ( ) const

inlineprotectedvirtual

returns the name of iterator

This method returns the name of the iterator operator. This function is typically needed, when the iterator operator is used inside of another operator and some debug output should be printed

Returns: const char* name of inverse operator

Implements ug::IPreconditioner< TAlgebra >.

◆ postprocess()

template<typename TAlgebra >

virtual bool ug::PILUTPreconditioner< TAlgebra >::postprocess ( )

inlineprotectedvirtual

cleans the operator

Implements ug::IPreconditioner< TAlgebra >.

◆ preprocess()

template<typename TAlgebra >

virtual bool ug::PILUTPreconditioner< TAlgebra >::preprocess ( SmartPtr< MatrixOperator< matrix_type, vector_type > > pOp )

inlineprotectedvirtual

initializes the preconditioner

This method is used to initialize the preconditioner. Usually, here are performed computationally expensive operations, that should only be computed once for an underlying matrix (e.g. LU factorization), while the preconditioner will by applied (using 'step'-method) several times.

Parameters

[in] mat underlying matrix (i.e. L in L*u = f)

Returns: bool success flag

Implements ug::IPreconditioner< TAlgebra >.

References ug::BlockNorm(), ug::PILUTPreconditioner< TAlgebra >::eliminate_row(), ug::PILUTPreconditioner< TAlgebra >::m_eps, ug::PILUTPreconditioner< TAlgebra >::m_info, ug::PILUTPreconditioner< TAlgebra >::m_L, ug::PILUTPreconditioner< TAlgebra >::m_show_progress, ug::PILUTPreconditioner< TAlgebra >::m_U, num_rows(), PROFILE_BEGIN, PROFILE_END, PROGRESS_FINISH, PROGRESS_START_WITH, PROGRESS_UPDATE, ug::reset_floats(), STATIC_ASSERT, and UG_LOG.

◆ set_info()

template<typename TAlgebra >

void ug::PILUTPreconditioner< TAlgebra >::set_info ( bool info )

inline

sets storage information output to true or false

References ug::PILUTPreconditioner< TAlgebra >::m_info.

◆ set_show_progress()

template<typename TAlgebra >

void ug::PILUTPreconditioner< TAlgebra >::set_show_progress ( bool s )

inline

set whether the progress meter should be shown

References ug::PILUTPreconditioner< TAlgebra >::m_show_progress, and s.

◆ set_threshold()

template<typename TAlgebra >

void ug::PILUTPreconditioner< TAlgebra >::set_threshold ( number thresh )

inline

sets threshold for incomplete LU factorisation (added 01122010ih)

References ug::PILUTPreconditioner< TAlgebra >::m_eps.

◆ step()

template<typename TAlgebra >

virtual bool ug::PILUTPreconditioner< TAlgebra >::step	(	SmartPtr< MatrixOperator< matrix_type, vector_type > >	pOp,
		vector_type &	c,
		const vector_type &	d
	)

inlineprotectedvirtual

computes a new correction c = B*d

This method computes a new correction c = B*d. It can only be called, when the preprocess has been done.

Parameters

[in]	mat	underlying matrix (i.e. L in L*u = f)
[out]	c	correction
[in]	d	defect

Returns: bool success flag

Implements ug::IPreconditioner< TAlgebra >.

References ug::BlockNorm(), ug::InverseMatMult(), ug::PILUTPreconditioner< TAlgebra >::m_L, ug::PILUTPreconditioner< TAlgebra >::m_small, ug::PILUTPreconditioner< TAlgebra >::m_U, ug::MatMultAdd(), ug::PST_CONSISTENT, s, UG_ASSERT, and UG_LOG.

Member Data Documentation

◆ m_eps

template<typename TAlgebra >

double ug::PILUTPreconditioner< TAlgebra >::m_eps

protected

Referenced by ug::PILUTPreconditioner< TAlgebra >::clone(), ug::PILUTPreconditioner< TAlgebra >::eliminate_row(), ug::PILUTPreconditioner< TAlgebra >::preprocess(), and ug::PILUTPreconditioner< TAlgebra >::set_threshold().

◆ m_info

template<typename TAlgebra >

bool ug::PILUTPreconditioner< TAlgebra >::m_info

protected

Referenced by ug::PILUTPreconditioner< TAlgebra >::clone(), ug::PILUTPreconditioner< TAlgebra >::preprocess(), and ug::PILUTPreconditioner< TAlgebra >::set_info().

◆ m_L

template<typename TAlgebra >

matrix_type ug::PILUTPreconditioner< TAlgebra >::m_L

protected

Referenced by ug::PILUTPreconditioner< TAlgebra >::preprocess(), and ug::PILUTPreconditioner< TAlgebra >::step().

◆ m_show_progress

template<typename TAlgebra >

bool ug::PILUTPreconditioner< TAlgebra >::m_show_progress

protected

Referenced by ug::PILUTPreconditioner< TAlgebra >::preprocess(), and ug::PILUTPreconditioner< TAlgebra >::set_show_progress().

◆ m_small

template<typename TAlgebra >

const number ug::PILUTPreconditioner< TAlgebra >::m_small = 1e-8

staticprotected

Referenced by ug::PILUTPreconditioner< TAlgebra >::step().

◆ m_U

template<typename TAlgebra >

matrix_type ug::PILUTPreconditioner< TAlgebra >::m_U

protected

Referenced by ug::PILUTPreconditioner< TAlgebra >::eliminate_row(), ug::PILUTPreconditioner< TAlgebra >::preprocess(), and ug::PILUTPreconditioner< TAlgebra >::step().

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

ugbase/lib_algebra/operator/preconditioner/pilut.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Private Types

Member Typedef Documentation

◆ algebra_type

◆ block_type

◆ matrix_operator_type

◆ matrix_type

◆ vector_type

Constructor & Destructor Documentation

◆ PILUTPreconditioner()

◆ ~PILUTPreconditioner()

Member Function Documentation

◆ clone()

◆ eliminate_row()

◆ name()

◆ postprocess()

◆ preprocess()

◆ set_info()

◆ set_show_progress()

◆ set_threshold()

◆ step()

Member Data Documentation

◆ m_eps

◆ m_info

◆ m_L

◆ m_show_progress

◆ m_small

◆ m_U