Factory for determing the number of partitions for rebalancing. More...

#include <MueLu_RepartitionHeuristicFactory_decl.hpp>

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

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

virtual	~RepartitionHeuristicFactory ()
	Destructor. More...

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

Input
void	DeclareInput (Level &currentLevel) const
	Determines the data that RepartitionHeuristicFactory needs, and the factories that generate that data. More...

Build methods.
void	Build (Level &currentLevel) const
	Build an object with this factory. More...

Additional Inherited Members
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

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::RepartitionHeuristicFactory< Scalar, LocalOrdinal, GlobalOrdinal, Node >

Factory for determing the number of partitions for rebalancing.

Given the unrebalanced (coarse) matrix A and some user parameters we determine the number of partitions (processes) the (rebalanced) matrix should use. The information is used as input for the Interface classes which perform the actual Zoltan call to determine the partition placement on the processors.

Note: A must be a "non-rebalanced" matrix generated by RAPFactory, SubBlockAFactory or BlockedRAPFactory; For blocked operators you have only one RepartitionHeuristicInterface instance. But you need an Interface class for each sub block on the diagonal of the input matrix.

Input/output of RepartitionHeuristicInterface

User parameters of RepartitionInterface

Parameter	type	default	master.xml	validated	requested	description
A	Factory	null		*	*	Generating factory of the matrix A used during the prolongator smoothing process
repartition: start level	int	2	*	*		Minimum level to run partitioner. MueLu does not rebalance levels finer than this one.
repartition: min rows per proc	LO	800	*	*		Minimum number of rows per processor. If the actual number if smaller, then rebalancing occurs.
repartition: max imbalance	double	1.2	*	*		Maximum nonzero imbalance ratio. If the actual number is larger, the rebalancing occurs.

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 RepartitionHeuristicFactory::GetValidParameters).
The * in the requested column states that the data is requested as input with all dependencies (see RepartitionHeuristicFactory::DeclareInput).

Variables provided by RepartitionHeuristicFactory

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

Parameter	generated by	description
number of partitions	RepartitionHeuristicFactory	Integer containing the number of partitions to be built. See below for details

The "number of partitions" variable contains the requested number of partitions for rebalancing. It is needed as input by the Interface classes (see, e.g., ZoltanInterface, Zoltan2Interface, IsorropiaInterface) and the RepartitionFactory. The Interface classes use it as input for the Zoltan call which considers the information when finding the rebalanced partition.

If "number of partitions" is 1 (i.e., move all data to one processor), we can skip the call to the Interface classes (see RepartitionFactory). If "number of partitions" is -1 we don't perform rebalancing (just keep the partition unchanged).

Definition at line 77 of file MueLu_RepartitionHeuristicFactory_decl.hpp.

Constructor & Destructor Documentation

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

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

default

Constructor.

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

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

virtualdefault

Destructor.

Member Function Documentation

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

RCP< const ParameterList > MueLu::RepartitionHeuristicFactory< 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 42 of file MueLu_RepartitionHeuristicFactory_def.hpp.

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

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

virtual

Determines the data that RepartitionHeuristicFactory needs, and the factories that generate that data.

If this class requires some data, but the generating factory is not specified in DeclareInput, then this class will fall back to the settings in FactoryManager.

Implements MueLu::SingleLevelFactoryBase.

Definition at line 64 of file MueLu_RepartitionHeuristicFactory_def.hpp.

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

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