Factory for creating a graph based on a given matrix. More...

#include <MueLu_CoalesceDropFactory_decl.hpp>

Inheritance diagram for MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >:

Public Member Functions
void	Build (Level &currentLevel) const
	Build an object with this factory. More...

Public Member Functions inherited from MueLu::SingleLevelFactoryBase
	SingleLevelFactoryBase ()
	Constructor. More...

virtual	~SingleLevelFactoryBase ()
	Destructor. More...

virtual void	CallBuild (Level &requestedLevel) const

virtual void	CallDeclareInput (Level &requestedLevel) const

Public Member Functions inherited from MueLu::Factory
void	EnableMultipleCallCheck () const

void	DisableMultipleCallCheck () const

void	ResetDebugData () const

	Factory ()
	Constructor. More...

virtual	~Factory ()
	Destructor. More...

virtual void	SetFactory (const std::string &varName, const RCP< const FactoryBase > &factory)
	Configuration. More...

const RCP< const FactoryBase >	GetFactory (const std::string &varName) const
	Default implementation of FactoryAcceptor::GetFactory() More...

RCP< ParameterList >	RemoveFactoriesFromList (const ParameterList &list) const

Public Member Functions inherited from MueLu::FactoryBase
	FactoryBase ()
	Constructor. More...

virtual	~FactoryBase ()
	Destructor. More...

int	GetID () const
	return unique factory id More...

Public Member Functions inherited from MueLu::BaseClass
virtual	~BaseClass ()
	Destructor. More...

Public Member Functions inherited from MueLu::VerboseObject
VerbLevel	GetVerbLevel () const
	Get the verbosity level. More...

void	SetVerbLevel (const VerbLevel verbLevel)
	Set the verbosity level of this object. More...

int	GetProcRankVerbose () const
	Get proc rank used for printing. Do not use this information for any other purpose. More...

int	SetProcRankVerbose (int procRank) const
	Set proc rank used for printing. More...

bool	IsPrint (MsgType type, int thisProcRankOnly=-1) const
	Find out whether we need to print out information for a specific message type. More...

Teuchos::FancyOStream &	GetOStream (MsgType type, int thisProcRankOnly=0) const
	Get an output stream for outputting the input message type. More...

Teuchos::FancyOStream &	GetBlackHole () const

	VerboseObject ()

virtual	~VerboseObject ()
	Destructor. More...

Public Member Functions inherited from Teuchos::VerboseObject< VerboseObject >
	VerboseObject (const EVerbosityLevel verbLevel=VERB_DEFAULT, const RCP< FancyOStream > &oStream=Teuchos::null)

virtual const VerboseObject &	setVerbLevel (const EVerbosityLevel verbLevel) const

virtual const VerboseObject &	setOverridingVerbLevel (const EVerbosityLevel verbLevel) const

virtual EVerbosityLevel	getVerbLevel () const

TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT RCP< const ParameterList >	getValidVerboseObjectSublist ()

TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT void	setupVerboseObjectSublist (ParameterList *paramList)

TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT void	readVerboseObjectSublist (ParameterList paramList, RCP< FancyOStream > oStream, EVerbosityLevel *verbLevel)

void	readVerboseObjectSublist (ParameterList paramList, VerboseObject< ObjectType > verboseObject)

Public Member Functions inherited from Teuchos::VerboseObjectBase
virtual	~VerboseObjectBase ()

	VerboseObjectBase (const RCP< FancyOStream > &oStream=Teuchos::null)

virtual const VerboseObjectBase &	setOStream (const RCP< FancyOStream > &oStream) const

virtual const VerboseObjectBase &	setOverridingOStream (const RCP< FancyOStream > &oStream) const

virtual VerboseObjectBase &	setLinePrefix (const std::string &linePrefix)

virtual RCP< FancyOStream >	getOStream () const

virtual RCP< FancyOStream >	getOverridingOStream () const

virtual std::string	getLinePrefix () const

virtual OSTab	getOSTab (const int tabs=1, const std::string &linePrefix="") const

Public Member Functions inherited from MueLu::Describable
virtual	~Describable ()
	Destructor. More...

virtual std::string	ShortClassName () const
	Return the class name of the object, without template parameters and without namespace. More...

virtual void	describe (Teuchos::FancyOStream &out_arg, const VerbLevel verbLevel=Default) const

virtual std::string	description () const
	Return a simple one-line description of this object. More...

void	describe (Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const
	Print the object with some verbosity level to an FancyOStream object. More...

Public Member Functions inherited from Teuchos::Describable
void	describe (std::ostream &out, const EVerbosityLevel verbLevel=verbLevel_default) const

	LabeledObject ()

virtual	~LabeledObject ()

virtual void	setObjectLabel (const std::string &objectLabel)

virtual std::string	getObjectLabel () const

DescribableStreamManipulatorState	describe (const Describable &describable, const EVerbosityLevel verbLevel=Describable::verbLevel_default)

std::ostream &	operator<< (std::ostream &os, const DescribableStreamManipulatorState &d)

Public Member Functions inherited from MueLu::FactoryAcceptor
virtual	~FactoryAcceptor ()

Public Member Functions inherited from MueLu::ParameterListAcceptorImpl
	ParameterListAcceptorImpl ()

virtual	~ParameterListAcceptorImpl ()=default

virtual void	SetParameterList (const Teuchos::ParameterList &paramList)
	Set parameters from a parameter list and return with default values. More...

virtual const Teuchos::ParameterList &	GetParameterList () const

void	SetParameter (const std::string &name, const ParameterEntry &entry)
	Set a parameter directly as a ParameterEntry. More...

const ParameterEntry &	GetParameter (const std::string &name) const
	Retrieves a const entry with the name name. More...

virtual void	GetDocumentation (std::ostream &os) const

Public Member Functions inherited from MueLu::ParameterListAcceptor
	ParameterListAcceptor ()

virtual	~ParameterListAcceptor ()=default

Private Member Functions
void	MergeRows (const Matrix &A, const LO row, Array< LO > &cols, const Array< LO > &translation) const
	Method to merge rows of matrix for systems of PDEs. More...

void	MergeRowsWithDropping (const Matrix &A, const LO row, const ArrayRCP< const SC > &ghostedDiagVals, SC threshold, Array< LO > &cols, const Array< LO > &translation) const

Teuchos::RCP< Xpetra::Matrix < Scalar, LocalOrdinal, GlobalOrdinal, Node > >	BlockDiagonalize (Level &currentLevel, const RCP< Matrix > &A, bool generate_matrix) const

void	BlockDiagonalizeGraph (const RCP< LWGraph > &inputGraph, const RCP< LocalOrdinalVector > &ghostedBlockNumber, RCP< LWGraph > &outputGraph, RCP< const Import > &importer) const

Private Attributes
RCP< PreDropFunctionBaseClass >	predrop_

Constructors/Destructors.
	CoalesceDropFactory ()
	Constructor. More...

virtual	~CoalesceDropFactory ()
	Destructor. More...

RCP< const ParameterList >	GetValidParameterList () const
	Return a const parameter list of valid parameters that setParameterList() will accept. More...

void	DeclareInput (Level &currentLevel) const
	Input. More...

void	SetPreDropFunction (const RCP< MueLu::PreDropFunctionBaseClass< Scalar, LocalOrdinal, GlobalOrdinal, Node > > &predrop)
	set predrop function More...

Additional Inherited Members
Static Public Member Functions inherited from MueLu::Factory
static void	EnableTimerSync ()

static void	DisableTimerSync ()

static void	EnableMultipleCheckGlobally ()

static void	DisableMultipleCheckGlobally ()

Static Public Member Functions inherited from MueLu::VerboseObject
static void	SetMueLuOStream (const Teuchos::RCP< Teuchos::FancyOStream > &mueluOStream)

static void	SetMueLuOFileStream (const std::string &filename)

static Teuchos::RCP < Teuchos::FancyOStream >	GetMueLuOStream ()

static void	SetDefaultVerbLevel (const VerbLevel defaultVerbLevel)
	Set the default (global) verbosity level. More...

static VerbLevel	GetDefaultVerbLevel ()
	Get the default (global) verbosity level. More...

Static Public Member Functions inherited from Teuchos::VerboseObject< VerboseObject >
static void	setDefaultVerbLevel (const EVerbosityLevel defaultVerbLevel)

static EVerbosityLevel	getDefaultVerbLevel ()

Static Public Member Functions inherited from Teuchos::VerboseObjectBase
static void	setDefaultOStream (const RCP< FancyOStream > &defaultOStream)

static RCP< FancyOStream >	getDefaultOStream ()

Static Public Attributes inherited from Teuchos::Describable
static const EVerbosityLevel	verbLevel_default

Protected Member Functions inherited from MueLu::Factory
void	Input (Level &level, const std::string &varName) const

void	Input (Level &level, const std::string &varName, const std::string &varParamName) const

template<class T >
T	Get (Level &level, const std::string &varName) const

template<class T >
T	Get (Level &level, const std::string &varName, const std::string &varParamName) const

template<class T >
void	Set (Level &level, const std::string &varName, const T &data) const

template<class T >
bool	IsType (Level &level, const std::string &varName) const

bool	IsAvailable (Level &level, const std::string &varName) const

Protected Member Functions inherited from Teuchos::VerboseObject< VerboseObject >
void	initializeVerboseObject (const EVerbosityLevel verbLevel=VERB_DEFAULT, const RCP< FancyOStream > &oStream=Teuchos::null)

Protected Member Functions inherited from Teuchos::VerboseObjectBase
void	initializeVerboseObjectBase (const RCP< FancyOStream > &oStream=Teuchos::null)

virtual void	informUpdatedVerbosityState () const

Static Protected Attributes inherited from MueLu::Factory
static bool	timerSync_ = false

Detailed Description

template<class Scalar = DefaultScalar, class LocalOrdinal = DefaultLocalOrdinal, class GlobalOrdinal = DefaultGlobalOrdinal, class Node = DefaultNode>
class MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >

Factory for creating a graph based on a given matrix.

Factory for creating graphs from matrices with entries selectively dropped.

Code paths

Both the classic dropping strategy as well as a coordinate-based distance laplacian method is implemented. For performance reasons there are four distinctive code paths for the classical method:

one DOF per node without dropping (i.e. "aggregation: drop tol" = 0.0)
one DOF per node with dropping (i.e. "aggregation: drop tol" > 0.0)
number of DOFs per node > 1 withouth dropping
number of DOFs per node > 1 with dropping

Additionally, there is a code path for the distance-laplacian mode.

Input/output of CoalesceDropFactory

User parameters of CoalesceDropFactory

Parameter	type	default	master.xml	validated	requested	description
A	Factory	null		*	*	Generating factory of the operator A
UnAmalgamationInfo	Factory	null		*	*	Generating factory of type AmalgamationFactory which generates the variable 'UnAmalgamationInfo'. Do not change the default unless you know what you are doing.
Coordinates	Factory	null		*	(*)	Generating factory for variable 'Coordinates'. The coordinates are only needed if "distance laplacian" is chosen for the parameter "aggregation: drop scheme"
"aggregation: drop scheme"	std::string	"classical"	*	*		Coalescing algorithm. You can choose either "classical" (=default) or "distance laplacian"
"aggregation: drop tol"	double	0.0	*	*		Threshold parameter for dropping small entries
"aggregation: Dirichlet threshold"	double	0.0	*	*		Threshold for determining whether entries are zero during Dirichlet row detection
"lightweight wrap"	bool	true		*		hidden switch between fast implementation based on MueLu::LWGraph and a failsafe slower implementation based on Xpetra::Graph (for comparison). The user should not change the default value (=true)

The * in the master.xml column denotes that the parameter is defined in the master.xml file.
The * in the validated column means that the parameter is declared in the list of valid input parameters (see CoalesceDropFactory::GetValidParameters).
The * in the requested column states that the data is requested as input with all dependencies (see CoalesceDropFactory::DeclareInput).

Variables provided by UncoupledAggregationFactory

After CoalesceDropFactory::Build the following data is available (if requested)

Parameter	generated by	description
Graph	CoalesceDropFactory	Graph of matrix A
DofsPerNode	CoalesceDropFactory	number of DOFs per node. Note, that we assume a constant number of DOFs per node for all nodes associated with the operator A.

Amalgamation process

The CoalesceDropFactory is internally using the AmalgamationFactory for amalgamating the dof-based maps to node-based maps. The AmalgamationFactory creates the "UnAmalgamationInfo" container which basically stores all the necessary information for translating dof based data to node based data and vice versa. The container is used, since this way the amalgamation is only done once and later reused by other factories.

Of course, often one does not need the information from the "UnAmalgamationInfo" container since the same information could be extracted of the "Graph" or the map from the "Coordinates" vector. However, there are also some situations (e.g. when doing rebalancing based on HyperGraph partitioning without coordinate information) where one has not access to a "Graph" or "Coordinates" variable.

Definition at line 98 of file MueLu_CoalesceDropFactory_decl.hpp.

Constructor & Destructor Documentation

template<class Scalar , class LocalOrdinal , class GlobalOrdinal , class Node >

MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::CoalesceDropFactory ( )

Constructor.

Definition at line 123 of file MueLu_CoalesceDropFactory_def.hpp.

template<class Scalar = DefaultScalar, class LocalOrdinal = DefaultLocalOrdinal, class GlobalOrdinal = DefaultGlobalOrdinal, class Node = DefaultNode>

virtual MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::~CoalesceDropFactory ( )

inlinevirtual

Destructor.

Definition at line 110 of file MueLu_CoalesceDropFactory_decl.hpp.

Member Function Documentation

template<class Scalar , class LocalOrdinal , class GlobalOrdinal , class Node >

RCP< const ParameterList > MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::GetValidParameterList ( ) const

virtual

Return a const parameter list of valid parameters that setParameterList() will accept.

Also define the default values of parameters according to the input parameter list.

Reimplemented from MueLu::Factory.

Definition at line 90 of file MueLu_CoalesceDropFactory_def.hpp.

template<class Scalar , class LocalOrdinal , class GlobalOrdinal , class Node >

void MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::DeclareInput ( Level & currentLevel ) const

virtual

Input.

Implements MueLu::SingleLevelFactoryBase.

Definition at line 127 of file MueLu_CoalesceDropFactory_def.hpp.

template<class Scalar = DefaultScalar, class LocalOrdinal = DefaultLocalOrdinal, class GlobalOrdinal = DefaultGlobalOrdinal, class Node = DefaultNode>

void MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::SetPreDropFunction ( const RCP< MueLu::PreDropFunctionBaseClass< Scalar, LocalOrdinal, GlobalOrdinal, Node > > & predrop )

inline

set predrop function

Definition at line 122 of file MueLu_CoalesceDropFactory_decl.hpp.

template<class Scalar , class LocalOrdinal , class GlobalOrdinal , class Node >

void MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::Build ( Level & currentLevel ) const

virtual

Build an object with this factory.

Implements MueLu::SingleLevelFactoryBase.

Definition at line 146 of file MueLu_CoalesceDropFactory_def.hpp.

template<class Scalar , class LocalOrdinal , class GlobalOrdinal , class Node >

void MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::MergeRows	(	const Matrix &	A,
		const LO	row,
		Array< LO > &	cols,
		const Array< LO > &	translation
	)		const

private

Method to merge rows of matrix for systems of PDEs.

Definition at line 1647 of file MueLu_CoalesceDropFactory_def.hpp.

template<class Scalar , class LocalOrdinal , class GlobalOrdinal , class Node >

void MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::MergeRowsWithDropping	(	const Matrix &	A,
		const LO	row,
		const ArrayRCP< const SC > &	ghostedDiagVals,
		SC	threshold,
		Array< LO > &	cols,
		const Array< LO > &	translation
	)		const

private

Definition at line 1706 of file MueLu_CoalesceDropFactory_def.hpp.

template<class Scalar , class LocalOrdinal , class GlobalOrdinal , class Node >

Teuchos::RCP< Xpetra::Matrix< Scalar, LocalOrdinal, GlobalOrdinal, Node > > MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::BlockDiagonalize	(	Level &	currentLevel,
		const RCP< Matrix > &	A,
		bool	generate_matrix
	)		const

private

Definition at line 1781 of file MueLu_CoalesceDropFactory_def.hpp.

template<class Scalar , class LocalOrdinal , class GlobalOrdinal , class Node >

void MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::BlockDiagonalizeGraph	(	const RCP< LWGraph > &	inputGraph,
		const RCP< LocalOrdinalVector > &	ghostedBlockNumber,
		RCP< LWGraph > &	outputGraph,
		RCP< const Import > &	importer
	)		const

private

Definition at line 1904 of file MueLu_CoalesceDropFactory_def.hpp.

Member Data Documentation

template<class Scalar = DefaultScalar, class LocalOrdinal = DefaultLocalOrdinal, class GlobalOrdinal = DefaultGlobalOrdinal, class Node = DefaultNode>

RCP<PreDropFunctionBaseClass> MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >::predrop_

mutableprivate

Definition at line 130 of file MueLu_CoalesceDropFactory_decl.hpp.

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

Public Member Functions

Private Member Functions

Private Attributes

Constructors/Destructors.

Additional Inherited Members

Detailed Description

template<class Scalar = DefaultScalar, class LocalOrdinal = DefaultLocalOrdinal, class GlobalOrdinal = DefaultGlobalOrdinal, class Node = DefaultNode> class MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >

Code paths

Input/output of CoalesceDropFactory

User parameters of CoalesceDropFactory

Variables provided by UncoupledAggregationFactory

Amalgamation process

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

template<class Scalar = DefaultScalar, class LocalOrdinal = DefaultLocalOrdinal, class GlobalOrdinal = DefaultGlobalOrdinal, class Node = DefaultNode>
class MueLu::CoalesceDropFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >