#include <deal.II/lac/trilinos_precondition.h>

Inheritance diagram for TrilinosWrappers::PreconditionSSOR:

Classes
struct	AdditionalData

Public Types
using	size_type = ::types::global_dof_index

Public Member Functions
void	initialize (const SparseMatrix &matrix, const AdditionalData &additional_data=AdditionalData())

void	clear ()

MPI_Comm	get_mpi_communicator () const

void	transpose ()

virtual void	vmult (MPI::Vector &dst, const MPI::Vector &src) const

virtual void	vmult (::Vector< double > &dst, const ::Vector< double > &src) const

virtual void	vmult (::LinearAlgebra::distributed::Vector< double > &dst, const ::LinearAlgebra::distributed::Vector< double > &src) const

virtual void	Tvmult (MPI::Vector &dst, const MPI::Vector &src) const

virtual void	Tvmult (::Vector< double > &dst, const ::Vector< double > &src) const

virtual void	Tvmult (::LinearAlgebra::distributed::Vector< double > &dst, const ::LinearAlgebra::distributed::Vector< double > &src) const

Access to underlying Trilinos data
Epetra_Operator &	trilinos_operator () const

Partitioners
IndexSet	locally_owned_domain_indices () const

IndexSet	locally_owned_range_indices () const

Teuchos::RCP< Epetra_Operator >	preconditioner

Epetra_MpiComm	communicator

std::shared_ptr< Epetra_Map >	vector_distributor

static ::ExceptionBase &	ExcNonMatchingMaps (std::string arg1)

Subscriptor functionality
Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class.
void	subscribe (std::atomic< bool > *const validity, const std::string &identifier="") const

void	unsubscribe (std::atomic< bool > *const validity, const std::string &identifier="") const

unsigned int	n_subscriptions () const

template<typename StreamType >
void	list_subscribers (StreamType &stream) const

void	list_subscribers () const

template<class Archive >
void	serialize (Archive &ar, const unsigned int version)

static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)

static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

using	map_value_type = decltype(counter_map)::value_type

using	map_iterator = decltype(counter_map)::iterator

std::atomic< unsigned int >	counter

std::map< std::string, unsigned int >	counter_map

std::vector< std::atomic< bool > * >	validity_pointers

const std::type_info *	object_info

static std::mutex	mutex

void	check_no_subscribers () const noexcept

Detailed Description

A wrapper class for a (pointwise) SSOR preconditioner for Trilinos matrices. This preconditioner works both in serial and in parallel, depending on the matrix it is based on.

The AdditionalData data structure allows to set preconditioner options. For the SSOR preconditioner, these options are the damping/relaxation parameter omega, a min_diagonal argument that can be used to make the preconditioner work even if the matrix contains some zero elements on the diagonal, and a parameter overlap that determines if and how much overlap there should be between the matrix partitions on the various MPI processes. The default settings are 1 for the relaxation parameter, 0 for the diagonal augmentation and 0 for the overlap.

Note that a parallel application of the SSOR preconditioner is actually a block-Jacobi preconditioner with block size equal to the local matrix size. Spoken more technically, this parallel operation is an additive Schwarz method with an SSOR approximate solve as inner solver, based on the outer parallel partitioning.

Definition at line 344 of file trilinos_precondition.h.

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

include/deal.II/lac/trilinos_precondition.h
source/lac/trilinos_precondition.cc

Classes

Public Types

Public Member Functions

Partitioners

Subscriptor functionality

Detailed Description