An implementation of the Partitioner interface that operates on Epetra matrices and linear systems. More...

#include <Isorropia_EpetraPartitioner2D.hpp>

Inheritance diagram for Isorropia::Epetra::Partitioner2D:

Collaboration diagram for Isorropia::Epetra::Partitioner2D:

Public Member Functions
	Partitioner2D (Teuchos::RCP< const Epetra_CrsGraph > input_graph, const Teuchos::ParameterList &paramlist=Teuchos::ParameterList("EmptyParameterList"), bool compute_partitioning_now=true)
	Constructor that accepts an Epetra_CrsGraph object, called by API function create_partitioner(). More...

	Partitioner2D (Teuchos::RCP< const Epetra_RowMatrix > input_matrix, const Teuchos::ParameterList &paramlist=Teuchos::ParameterList("EmptyParameterList"), bool compute_partitioning_now=true)
	Constructor that accepts an Epetra_RowMatrix object, called by API function create_partitioner(). More...

virtual	~Partitioner2D ()
	Destructor. More...

void	partition (bool force_repartitioning=false)
	partition is a method that computes a rebalanced partitioning for the data in the object that this class was constructed with. More...

virtual void	compute (bool forceRecomputing=false)
	Method which does the work of computing a new partitioning/coloring/ordering, depending on the child class used. More...

int	numElemsInPart (int part) const
	Return the number of LOCAL elements in a given part. More...

int	getNZIndx (int row, int column) const

void	elemsInPart (int part, int *elementList, int len) const
	global element ids to be located in the given partition. More...

int	createDomainAndRangeMaps (Epetra_Map domainMap, Epetra_Map rangeMap)

int	createColumnMap (Epetra_Map *colMap)

int	createRowMap (Epetra_Map *rowMap)

virtual int	extractPartsView (int &size, const int *&array) const
	Give access of the part assignments array that is owned by the current processor. More...

virtual int	extractPartsCopy (int len, int &size, int *array) const
	Copy a part of the part assignment array. More...

virtual void	setParameters (const Teuchos::ParameterList &paramlist)=0
	Set parameters for the Operator instance. More...

void	setParameters (const Teuchos::ParameterList &paramlist)
	setParameters() is an internal method which handles the parameters from a Teuchos::ParameterList object. More...

Teuchos::RCP < Isorropia::Epetra::CostDescriber > &	getCosts ()
	Get the cost object. More...

bool	alreadyComputed () const
	Query whether compute_operation() has already been called. More...

int	numProperties () const
	Return the number of different values used for "properties". More...

int	numLocalProperties () const
	Return the number of different values used for "properties" for this process only. More...

virtual const int &	operator[] (int myElem) const
	Return the new partition ID for a given element that resided locally in the old operation. More...

virtual int	numElemsWithProperty (int property) const
	Return the number of elements in a given partition. More...

virtual void	elemsWithProperty (int property, int *elementList, int len) const
	Fill user-allocated list (of length len) with the global element ids to be located in the given partition. More...

virtual int	extractPropertiesCopy (int len, int &size, int *array) const
	Copy a part of the property array. More...

virtual int	extractPropertiesView (int &size, const int *&array) const
	Give access of the property array that is owned by the current processor. More...


virtual bool	alreadyComputed () const =0
	Query whether the computation has already been called. More...

virtual int	numProperties () const =0
	Return the number of different values used for "properties". More...

virtual int	numLocalProperties () const =0
	Return the number of different values used for "properties" for this process only. More...

virtual const int &	operator[] (int myElem) const =0
	Return the "property" for a given element that resided locally. More...

virtual int	numElemsWithProperty (int property) const =0
	Return the number of LOCAL elements with the given property. More...

virtual void	elemsWithProperty (int property, int *elementList, int len) const =0
	Fill user-allocated list (of length len) with the local element ids of the LOCAL elements with the given property. More...

virtual int	extractPropertiesView (int &size, const int *&array) const =0
	Give access of the property array that is owned by the current processor. More...

virtual int	extractPropertiesCopy (int len, int &size, int *array) const =0
	Copy a part of the property array. More...

Protected Member Functions
void	computeNumberOfProperties ()

Protected Attributes
Teuchos::RCP< const Epetra_BlockMap >	input_map_

Teuchos::RCP< const Epetra_CrsGraph >	input_graph_

Teuchos::RCP< const Epetra_RowMatrix >	input_matrix_

Teuchos::RCP< const Epetra_MultiVector >	input_coords_

Teuchos::RCP < Isorropia::Epetra::CostDescriber >	costs_

Teuchos::RCP< const Epetra_MultiVector >	weights_

Teuchos::ParameterList	paramlist_

int	exportsSize_

std::vector< int >	imports_

std::vector< int >	properties_

bool	operation_already_computed_

int	global_num_vertex_weights_

int	global_num_graph_edge_weights_

int	global_num_hg_edge_weights_

Teuchos::RCP< Library >	lib_

int	base_

Detailed Description

An implementation of the Partitioner interface that operates on Epetra matrices and linear systems.

Constructor & Destructor Documentation

Isorropia::Epetra::Partitioner2D::Partitioner2D	(	Teuchos::RCP< const Epetra_CrsGraph >	input_graph,
		const Teuchos::ParameterList &	paramlist = `Teuchos::ParameterList("EmptyParameterList")`,
		bool	compute_partitioning_now = `true`
	)

Constructor that accepts an Epetra_CrsGraph object, called by API function create_partitioner().

Parameters

input_graph	Matrix-graph object for which a new partitioning is to be computed. A Teuchos::RefCountPtr is used here because a reference to the input object may be held by this object after this constructor completes and returns.
paramlist	Teuchos::ParameterList which will be copied to an internal ParameterList attribute. No reference to this input object is held after this constructor completes. If the ParameterList object contains a sublist named "Zoltan", then the Zoltan library is used to perform the balancing. Also, any parameters in the "Zoltan" sublist will be relayed directly to Zoltan. Refer to the Zoltan users guide for specific parameters that Zoltan recognizes. A couple of important ones are "LB_METHOD" (valid values include "GRAPH", "HYPERGRAPH"), "DEBUG_LEVEL" (valid values are 0 to 10, default is 1), etc.
compute_partitioning_now	Optional argument defaults to true. If true, the method compute_partitioning() will be called before this constructor returns.

Isorropia::Epetra::Partitioner2D::Partitioner2D	(	Teuchos::RCP< const Epetra_RowMatrix >	input_matrix,
		const Teuchos::ParameterList &	paramlist = `Teuchos::ParameterList("EmptyParameterList")`,
		bool	compute_partitioning_now = `true`
	)

Constructor that accepts an Epetra_RowMatrix object, called by API function create_partitioner().

Parameters

input_matrix	Matrix object for which a new partitioning is to be computed. A Teuchos::RefCountPtr is used here because a reference to the input object may be held by this object after this constructor completes and returns.
paramlist	Teuchos::ParameterList which will be copied to an internal ParameterList attribute. No reference to this input object is held after this constructor completes. If the ParameterList object contains a sublist named "Zoltan", then the Zoltan library is used to perform the balancing. Also, any parameters in the "Zoltan" sublist will be relayed directly to Zoltan. Refer to the Zoltan users guide for specific parameters that Zoltan recognizes. A couple of important ones are "LB_METHOD" (valid values include "GRAPH", "HYPERGRAPH"), "DEBUG_LEVEL" (valid values are 0 to 10, default is 1), etc.
compute_partitioning_now	Optional argument defaults to true. If true, the method compute_partitioning() will be called before this constructor returns.

virtual Isorropia::Epetra::Partitioner2D::~Partitioner2D ( )

virtual

Destructor.

Reimplemented from Isorropia::Partitioner2D.

Member Function Documentation

void Isorropia::Epetra::Partitioner2D::partition ( bool force_repartitioning = false )

virtual

partition is a method that computes a rebalanced partitioning for the data in the object that this class was constructed with.

Parameters

force_repartitioning Optional argument defaults to false. By default, compute_partitioning() only does anything the first time it is called, and subsequent repeated calls are no-ops. If the user's intent is to re-compute the partitioning (e.g., if parameters or other inputs have been changed), then setting this flag to true will force a new partitioning to be computed.

Implements Isorropia::Partitioner2D.

virtual void Isorropia::Epetra::Partitioner2D::compute ( bool forceRecomputing = false )

virtual

Method which does the work of computing a new partitioning/coloring/ordering, depending on the child class used.

Parameters

forceRecomputing Optional argument defaults to false. Depending on the implementation, compute() should only perform a computation the first time it is called, and subsequent repeated calls are no-ops. If the user's intent is to re-compute the results (e.g., if parameters or other inputs have been changed), then setting this flag to true will force a new result to be computed.

Implements Isorropia::Epetra::Operator.

int Isorropia::Epetra::Partitioner2D::numElemsInPart ( int part ) const

virtual

Return the number of LOCAL elements in a given part.

Parameters

[in] part the part ID we want to know the number of local elements.

Returns: number of local elements that belongs to the given part.

See Also: Isorropia::Operator::numElemsWithProperty()

Implements Isorropia::Partitioner2D.

int Isorropia::Epetra::Partitioner2D::getNZIndx	(	int	row,
		int	column
	)		const

void Isorropia::Epetra::Partitioner2D::elemsInPart	(	int	part,
		int *	elementList,
		int	len
	)		const

virtual

global element ids to be located in the given partition.

Implements Isorropia::Partitioner2D.

int Isorropia::Epetra::Partitioner2D::createDomainAndRangeMaps	(	Epetra_Map *	domainMap,
		Epetra_Map *	rangeMap
	)

int Isorropia::Epetra::Partitioner2D::createColumnMap ( Epetra_Map * colMap )

int Isorropia::Epetra::Partitioner2D::createRowMap ( Epetra_Map * rowMap )

virtual int Isorropia::Partitioner::extractPartsView	(	int &	size,
		const int *&	array
	)		const

inlinevirtualinherited

Give access of the part assignments array that is owned by the current processor.

Parameters

[out]	size	Number of elements in the array.
[out]	array	Pointer to the the part assignements array inside the object.

Remarks: This pointer is only significant if the object still exists. Otherwise, you must use

See Also: Isorropia::Operator::extractPartsCopy(); Isorropia::Operator::extractPropertiesView()

virtual int Isorropia::Partitioner::extractPartsCopy	(	int	len,
		int &	size,
		int *	array
	)		const

inlinevirtualinherited

Copy a part of the part assignment array.

Parameters

[in]	len	of the array given by the user.
[out]	size	Number of elements in the array.
[out]	array	Array of part assignments. Allocated by the user with a size of at least `len` elements.

Remarks: Memory space which is not useful in the array is not initialized or used in this method.

See Also: Isorropia::Operator::extractPropertiesCopy()

virtual void Isorropia::Operator::setParameters ( const Teuchos::ParameterList & paramlist )

pure virtualinherited

Set parameters for the Operator instance.

The contents of the input paramlist object are copied into an internal ParameterList attribute. Instances of this interface should not retain a reference to the input ParameterList after this method returns.

Parameters

[in] paramlist List of parameters that the user wants to use.

Implemented in Isorropia::Epetra::Operator.

virtual bool Isorropia::Operator::alreadyComputed ( ) const

pure virtualinherited

Query whether the computation has already been called.

Returns: True if the computation has already been done, False otherwise.

Implemented in Isorropia::Epetra::Operator.

virtual int Isorropia::Operator::numProperties ( ) const

pure virtualinherited

Return the number of different values used for "properties".

For example, the number of colors or the number of parts used for the overall graph/matrix.

Returns: Global number of values for properties

Remarks: Infact, it returns the upper bound of the interval of taken values. For example, for the colors "1,2,4" , it will return "4"

Implemented in Isorropia::Epetra::Operator.

virtual int Isorropia::Operator::numLocalProperties ( ) const

pure virtualinherited

Return the number of different values used for "properties" for this process only.

Returns: Local number of values for properties

Implemented in Isorropia::Epetra::Operator.

virtual const int& Isorropia::Operator::operator[] ( int myElem ) const

pure virtualinherited

Return the "property" for a given element that resided locally.

Parameters

[in] myElem the local ID of the element we want to know the property.

Returns: property associated to the local element.

Implemented in Isorropia::Epetra::Operator.

virtual int Isorropia::Operator::numElemsWithProperty ( int property ) const

pure virtualinherited

Return the number of LOCAL elements with the given property.

Parameters

[in] property Value of the property to consider.

Returns: Number of local elems which have this property.

Implemented in Isorropia::Epetra::Operator.

virtual void Isorropia::Operator::elemsWithProperty	(	int	property,
		int *	elementList,
		int	len
	)		const

pure virtualinherited

Fill user-allocated list (of length len) with the local element ids of the LOCAL elements with the given property.

Parameters

[in]	property	Value of the property to consider.
[out]	elementList	User allocated array (of size at least `len`) of local ID that have the asked property.
[in]	len	Maximum lenght for the array. If `len` is greater than the result of numElemsWithProperty() for `property`, only the first and relevant elements are filled.

Remarks: Memory space which is not useful in the array is not initialized or used in this method.

Implemented in Isorropia::Epetra::Operator.

virtual int Isorropia::Operator::extractPropertiesView	(	int &	size,
		const int *&	array
	)		const

pure virtualinherited

Give access of the property array that is owned by the current processor.

Parameters

[out]	size	Number of elements in the array.
[out]	array	Pointer to the the properties array inside the object.

Remarks: This pointer is only significant if the object still exists. Otherwise, you must use

See Also: Isorropia::Operator::extractPropertiesCopy().; Isorropia::Operator::extractPropertiesCopy()

Implemented in Isorropia::Epetra::Operator.

virtual int Isorropia::Operator::extractPropertiesCopy	(	int	len,
		int &	size,
		int *	array
	)		const

pure virtualinherited

Copy a part of the property array.

Parameters

[in]	len	of the array given by the user.
[out]	size	Number of elements in the array.
[out]	array	Array of properties. Allocated by the user with a size of at least `len` elements.

Remarks: Memory space which is not useful in the array is not initialized or used in this method.

See Also: Isorropia::Operator::extractPropertiesView()

Implemented in Isorropia::Epetra::Operator.

void Isorropia::Epetra::Operator::setParameters ( const Teuchos::ParameterList & paramlist )

virtualinherited

setParameters() is an internal method which handles the parameters from a Teuchos::ParameterList object.

Implements Isorropia::Operator.

Teuchos::RCP<Isorropia::Epetra::CostDescriber>& Isorropia::Epetra::Operator::getCosts ( )

inlineinherited

Get the cost object.

bool Isorropia::Epetra::Operator::alreadyComputed ( ) const

inlinevirtualinherited

Query whether compute_operation() has already been called.

Implements Isorropia::Operator.

int Isorropia::Epetra::Operator::numProperties ( ) const

inlinevirtualinherited

Return the number of different values used for "properties".

For example, the number of colors or the number of parts used for the overall graph/matrix.

Returns: Global number of values for properties

Remarks: Infact, it returns the upper bound of the interval of taken values. For example, for the colors "1,2,4" , it will return "4"

Implements Isorropia::Operator.

int Isorropia::Epetra::Operator::numLocalProperties ( ) const

inlinevirtualinherited

Return the number of different values used for "properties" for this process only.

Returns: Local number of values for properties

Implements Isorropia::Operator.

virtual const int& Isorropia::Epetra::Operator::operator[] ( int myElem ) const

virtualinherited

Return the new partition ID for a given element that resided locally in the old operation.

Implements Isorropia::Operator.

virtual int Isorropia::Epetra::Operator::numElemsWithProperty ( int property ) const

virtualinherited

Return the number of elements in a given partition.

Implements Isorropia::Operator.

virtual void Isorropia::Epetra::Operator::elemsWithProperty	(	int	property,
		int *	elementList,
		int	len
	)		const

virtualinherited

Fill user-allocated list (of length len) with the global element ids to be located in the given partition.

Implements Isorropia::Operator.

virtual int Isorropia::Epetra::Operator::extractPropertiesCopy	(	int	len,
		int &	size,
		int *	array
	)		const

virtualinherited

Copy a part of the property array.

Parameters

[in]	len	of the array given by the user.
[out]	size	Number of elements in the array.
[out]	array	Array of properties. Allocated by the user with a size of at least `len` elements.

Remarks: Memory space which is not useful in the array is not initialized or used in this method.

See Also: Isorropia::Operator::extractPropertiesView()

Implements Isorropia::Operator.

virtual int Isorropia::Epetra::Operator::extractPropertiesView	(	int &	size,
		const int *&	array
	)		const

virtualinherited

Give access of the property array that is owned by the current processor.

Parameters

[out]	size	Number of elements in the array.
[out]	array	Pointer to the the properties array inside the object.

Remarks: This pointer is only significant if the object still exists. Otherwise, you must use

See Also: Isorropia::Operator::extractPropertiesCopy().; Isorropia::Operator::extractPropertiesCopy()

Implements Isorropia::Operator.

void Isorropia::Epetra::Operator::computeNumberOfProperties ( )

protectedinherited

Member Data Documentation

Teuchos::RCP<const Epetra_BlockMap> Isorropia::Epetra::Operator::input_map_

protectedinherited

Teuchos::RCP<const Epetra_CrsGraph> Isorropia::Epetra::Operator::input_graph_

protectedinherited

Teuchos::RCP<const Epetra_RowMatrix> Isorropia::Epetra::Operator::input_matrix_

protectedinherited

Teuchos::RCP<const Epetra_MultiVector> Isorropia::Epetra::Operator::input_coords_

protectedinherited

Teuchos::RCP<Isorropia::Epetra::CostDescriber> Isorropia::Epetra::Operator::costs_

protectedinherited

Teuchos::RCP<const Epetra_MultiVector> Isorropia::Epetra::Operator::weights_

protectedinherited

Teuchos::ParameterList Isorropia::Epetra::Operator::paramlist_

protectedinherited

int Isorropia::Epetra::Operator::exportsSize_

protectedinherited

std::vector<int> Isorropia::Epetra::Operator::imports_

protectedinherited

std::vector<int> Isorropia::Epetra::Operator::properties_

protectedinherited

bool Isorropia::Epetra::Operator::operation_already_computed_

protectedinherited

int Isorropia::Epetra::Operator::global_num_vertex_weights_

protectedinherited

int Isorropia::Epetra::Operator::global_num_graph_edge_weights_

protectedinherited

int Isorropia::Epetra::Operator::global_num_hg_edge_weights_

protectedinherited

Teuchos::RCP<Library> Isorropia::Epetra::Operator::lib_

protectedinherited

int Isorropia::Epetra::Operator::base_

protectedinherited

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

Isorropia_EpetraPartitioner2D.hpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation