Ifpack_EquationPartitioner: A class to decompose an Ifpack_Graph so that each block will contain all the rows for a different equation. More...

#include <Ifpack_EquationPartitioner.h>

Inheritance diagram for Ifpack_EquationPartitioner:

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Public Member Functions
	Ifpack_EquationPartitioner (const Ifpack_Graph *Graph)
	Constructor. More...

virtual	~Ifpack_EquationPartitioner ()
	Destructor. More...

int	SetPartitionParameters (Teuchos::ParameterList &)
	Sets all the parameters for the partitioner. More...

int	ComputePartitions ()
	Computes the partitions. Returns 0 if successful. More...

Public Member Functions inherited from Ifpack_OverlappingPartitioner
	Ifpack_OverlappingPartitioner (const Ifpack_Graph *Graph)
	Constructor. More...

virtual	~Ifpack_OverlappingPartitioner ()
	Destructor. More...

int	NumLocalParts () const
	Returns the number of computed local partitions. More...

int	OverlappingLevel () const
	Returns the overlapping level. More...

int	operator() (int MyRow) const
	Returns the local non-overlapping partition ID of the specified row. More...

int	operator() (int i, int j) const
	Returns the local overlapping partition ID of the j-th node in partition i. More...

int	NumRowsInPart (const int Part) const
	Returns the number of rows contained in specified partition. More...

int	RowsInPart (const int Part, int *List) const
	Copies into List the rows in the (overlapping) partition Part. More...

const int *	NonOverlappingPartition () const
	Returns a pointer to the integer vector containing the non-overlapping partition ID of each local row. More...

virtual int	SetParameters (Teuchos::ParameterList &List)
	Sets all the parameters for the partitioner. More...

virtual int	Compute ()
	Computes the partitions. Returns 0 if successful. More...

virtual int	ComputeOverlappingPartitions ()
	Computes the partitions. Returns 0 if successful. More...

bool	IsComputed ()
	Returns true if partitions have been computed successfully. More...

virtual std::ostream &	Print (std::ostream &os) const
	Prints basic information on iostream. This function is used by operator<<. More...

Public Member Functions inherited from Ifpack_Partitioner
virtual	~Ifpack_Partitioner ()
	Destructor. More...

Additional Inherited Members
Protected Member Functions inherited from Ifpack_OverlappingPartitioner
int	NumMyRows () const
	Returns the number of local rows. More...

int	NumMyNonzeros () const
	Returns the number of local nonzero elements. More...

int	NumGlobalRows () const
	Returns the number of global rows. More...

long long	NumGlobalRows64 () const

int	MaxNumEntries () const
	Returns the max number of local entries in a row. More...

const Epetra_Comm &	Comm () const
	Returns the communicator object of Graph. More...

Protected Attributes inherited from Ifpack_OverlappingPartitioner
int	NumLocalParts_
	Number of local subgraphs. More...

std::vector< int >	Partition_
	Partition_[i] contains the ID of non-overlapping part it belongs to. More...

std::vector< std::vector< int > >	Parts_
	Parts_[i][j] is the ID of the j-th row contained in the (overlapping) More...

const Ifpack_Graph *	Graph_
	Reference to the graph to be partitioned. More...

int	OverlappingLevel_
	Overlapping level. More...

bool	IsComputed_
	If `true`, the graph has been successfully partitioned. More...

bool	verbose_
	If `true`, information are reported on cout. More...

Detailed Description

Ifpack_EquationPartitioner: A class to decompose an Ifpack_Graph so that each block will contain all the rows for a different equation.

Ifpack_EquationPartitioner enables a decomposition into blocks of equations. Suppose that the input Ifpack_Graph is based on an Epetra_RowMatrix, whose rows represent (U_i,V_i,P_i) for each grid node i. This partitioner will decompose the graph into three subgraphs, each of them containing the rows of U, then V, than P.

The number of equations is set as the number of local partitions.