Reference documentation for deal.II version 9.6.0
\(\newcommand{\dealvcentcolon}{\mathrel{\mathop{:}}}\) \(\newcommand{\dealcoloneq}{\dealvcentcolon\mathrel{\mkern-1.2mu}=}\) \(\newcommand{\jump}[1]{\left[\!\left[ #1 \right]\!\right]}\) \(\newcommand{\average}[1]{\left\{\!\left\{ #1 \right\}\!\right\}}\)
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Classes | Public Types | Public Member Functions | Static Public Member Functions | Protected Attributes | Private Types | Private Member Functions | Private Attributes | Static Private Attributes | List of all members
TrilinosWrappers::PreconditionAMGMueLu Class Reference
Linear algebra classes » TrilinosWrappers | Linear algebra classes | Linear algebra classes » Matrix classes » Preconditioners and Relaxation Operators

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

Inheritance diagram for TrilinosWrappers::PreconditionAMGMueLu:
Inheritance graph
[legend]

Classes

struct  AdditionalData
 

Public Types

using size_type = ::types::global_dof_index
 

Public Member Functions

 PreconditionAMGMueLu ()
 
virtual ~PreconditionAMGMueLu () override=default
 
void initialize (const SparseMatrix &matrix, const AdditionalData &additional_data=AdditionalData())
 
void initialize (const Epetra_CrsMatrix &matrix, const AdditionalData &additional_data=AdditionalData())
 
void initialize (const SparseMatrix &matrix, Teuchos::ParameterList &muelu_parameters)
 
void initialize (const Epetra_CrsMatrix &matrix, Teuchos::ParameterList &muelu_parameters)
 
template<typename number >
void initialize (const ::SparseMatrix< number > &deal_ii_sparse_matrix, const AdditionalData &additional_data=AdditionalData(), const double drop_tolerance=1e-13, const ::SparsityPattern *use_this_sparsity=nullptr)
 
void clear ()
 
size_type memory_consumption () const
 
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
 
template<class Archive >
void serialize (Archive &ar, const unsigned int version)
 
Access to underlying Trilinos data
Epetra_Operator & trilinos_operator () const
 
Partitioners
IndexSet locally_owned_domain_indices () const
 
IndexSet locally_owned_range_indices () const
 
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
 

Static Public Member Functions

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

Protected Attributes

Teuchos::RCP< Epetra_Operator > preconditioner
 
Epetra_MpiComm communicator
 

Private Types

using map_value_type = decltype(counter_map)::value_type
 
using map_iterator = decltype(counter_map)::iterator
 

Private Member Functions

void check_no_subscribers () const noexcept
 

Private Attributes

std::shared_ptr< SparseMatrix > trilinos_matrix
 
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 Private Attributes

static std::mutex mutex
 

Detailed Description

This class implements an algebraic multigrid (AMG) preconditioner based on the Trilinos MueLu implementation, which is a black-box preconditioner that works well for many PDE-based linear problems. The interface of PreconditionerAMGMueLu is the same as the interface of PreconditionerAMG except for the higher_order_elements parameter which does not exist in PreconditionerAMGMueLu.

Note
You need to configure Trilinos with MueLU support for this preconditioner to work.
At the moment 64bit-indices are not supported.
Warning
This interface should not be considered as stable.

Definition at line 1705 of file trilinos_precondition.h.

Member Typedef Documentation

◆ size_type

using TrilinosWrappers::PreconditionBase::size_type = ::types::global_dof_index
inherited

Declare the type for container size.

Definition at line 82 of file trilinos_precondition.h.

◆ map_value_type

using Subscriptor::map_value_type = decltype(counter_map)::value_type
privateinherited

The data type used in counter_map.

Definition at line 229 of file subscriptor.h.

◆ map_iterator

using Subscriptor::map_iterator = decltype(counter_map)::iterator
privateinherited

The iterator type used in counter_map.

Definition at line 234 of file subscriptor.h.

Constructor & Destructor Documentation

◆ PreconditionAMGMueLu()

TrilinosWrappers::PreconditionAMGMueLu::PreconditionAMGMueLu ( )

Constructor.

Definition at line 55 of file trilinos_precondition_muelu.cc.

◆ ~PreconditionAMGMueLu()

virtual TrilinosWrappers::PreconditionAMGMueLu::~PreconditionAMGMueLu ( )
overridevirtualdefault

Destructor.

Member Function Documentation

◆ initialize() [1/5]

void TrilinosWrappers::PreconditionAMGMueLu::initialize ( const SparseMatrix & matrix,
const AdditionalData & additional_data = AdditionalData() )

Let Trilinos compute a multilevel hierarchy for the solution of a linear system with the given matrix. The function uses the matrix format specified in TrilinosWrappers::SparseMatrix.

Definition at line 72 of file trilinos_precondition_muelu.cc.

◆ initialize() [2/5]

void TrilinosWrappers::PreconditionAMGMueLu::initialize ( const Epetra_CrsMatrix & matrix,
const AdditionalData & additional_data = AdditionalData() )

Let Trilinos compute a multilevel hierarchy for the solution of a linear system with the given matrix. As opposed to the other initialize function above, this function uses an object of type Epetra_CrsMatrixCrs.

Definition at line 81 of file trilinos_precondition_muelu.cc.

◆ initialize() [3/5]

void TrilinosWrappers::PreconditionAMGMueLu::initialize ( const SparseMatrix & matrix,
Teuchos::ParameterList & muelu_parameters )

Let Trilinos compute a multilevel hierarchy for the solution of a linear system with the given matrix. The function uses the matrix format specified in TrilinosWrappers::SparseMatrix.

This function is similar to the one above, but allows the user to set most of the options of the Trilinos ML preconditioner. In order to find out about all the options for ML, we refer to the ML documentation page. Not all ML options have a corresponding MueLu option.

Definition at line 185 of file trilinos_precondition_muelu.cc.

◆ initialize() [4/5]

void TrilinosWrappers::PreconditionAMGMueLu::initialize ( const Epetra_CrsMatrix & matrix,
Teuchos::ParameterList & muelu_parameters )

Let Trilinos compute a multilevel hierarchy for the solution of a linear system with the given matrix. As opposed to the other initialize function above, this function uses an object of type Epetra_CrsMatrix.

Definition at line 194 of file trilinos_precondition_muelu.cc.

◆ initialize() [5/5]

template<typename number >
void TrilinosWrappers::PreconditionAMGMueLu::initialize ( const ::SparseMatrix< number > & deal_ii_sparse_matrix,
const AdditionalData & additional_data = AdditionalData(),
const double drop_tolerance = 1e-13,
const ::SparsityPattern * use_this_sparsity = nullptr )

Let Trilinos compute a multilevel hierarchy for the solution of a linear system with the given matrix. This function takes a deal.II matrix and copies the content into a Trilinos matrix, so the function can be considered rather inefficient.

Definition at line 207 of file trilinos_precondition_muelu.cc.

◆ clear()

void TrilinosWrappers::PreconditionAMGMueLu::clear ( )

Destroys the preconditioner, leaving an object like just after having called the constructor.

Definition at line 241 of file trilinos_precondition_muelu.cc.

◆ memory_consumption()

PreconditionAMGMueLu::size_type TrilinosWrappers::PreconditionAMGMueLu::memory_consumption ( ) const

Prints an estimate of the memory consumption of this class.

Definition at line 250 of file trilinos_precondition_muelu.cc.

◆ get_mpi_communicator()

MPI_Comm TrilinosWrappers::PreconditionBase::get_mpi_communicator ( ) const
inherited

Return the underlying MPI communicator.

Definition at line 47 of file trilinos_precondition.cc.

◆ transpose()

void TrilinosWrappers::PreconditionBase::transpose ( )
inherited

Sets an internal flag so that all operations performed by the matrix, i.e., multiplications, are done in transposed order. However, this does not reshape the matrix to transposed form directly, so care should be taken when using this flag.

Note
Calling this function any even number of times in succession will return the object to its original state.

◆ vmult() [1/3]

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

Apply the preconditioner.

Reimplemented in TrilinosWrappers::PreconditionIdentity.

◆ vmult() [2/3]

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

Apply the preconditioner on deal.II data structures instead of the ones provided in the Trilinos wrapper class.

Reimplemented in TrilinosWrappers::PreconditionIdentity.

◆ vmult() [3/3]

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

Apply the preconditioner on deal.II parallel data structures instead of the ones provided in the Trilinos wrapper class.

◆ Tvmult() [1/3]

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

Apply the transpose preconditioner.

Reimplemented in TrilinosWrappers::PreconditionIdentity.

◆ Tvmult() [2/3]

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

Apply the transpose preconditioner on deal.II data structures instead of the ones provided in the Trilinos wrapper class.

Reimplemented in TrilinosWrappers::PreconditionIdentity.

◆ Tvmult() [3/3]

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

Apply the transpose preconditioner on deal.II parallel data structures instead of the ones provided in the Trilinos wrapper class.

◆ trilinos_operator()

Epetra_Operator & TrilinosWrappers::PreconditionBase::trilinos_operator ( ) const
inherited

Calling this function from an uninitialized object will cause an exception.

Definition at line 54 of file trilinos_precondition.cc.

◆ locally_owned_domain_indices()

IndexSet TrilinosWrappers::PreconditionBase::locally_owned_domain_indices ( ) const
inherited

Return the partitioning of the domain space of this matrix, i.e., the partitioning of the vectors this matrix has to be multiplied with.

Definition at line 63 of file trilinos_precondition.cc.

◆ locally_owned_range_indices()

IndexSet TrilinosWrappers::PreconditionBase::locally_owned_range_indices ( ) const
inherited

Return the partitioning of the range space of this matrix, i.e., the partitioning of the vectors that are result from matrix-vector products.

Definition at line 70 of file trilinos_precondition.cc.

◆ subscribe()

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

Subscribes a user of the object by storing the pointer validity. The subscriber may be identified by text supplied as identifier.

Definition at line 135 of file subscriptor.cc.

◆ unsubscribe()

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

Unsubscribes a user from the object.

Note
The identifier and the validity pointer must be the same as the one supplied to subscribe().

Definition at line 155 of file subscriptor.cc.

◆ n_subscriptions()

unsigned int Subscriptor::n_subscriptions ( ) const
inlineinherited

Return the present number of subscriptions to this object. This allows to use this class for reference counted lifetime determination where the last one to unsubscribe also deletes the object.

Definition at line 300 of file subscriptor.h.

◆ list_subscribers() [1/2]

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

List the subscribers to the input stream.

Definition at line 317 of file subscriptor.h.

◆ list_subscribers() [2/2]

void Subscriptor::list_subscribers ( ) const
inherited

List the subscribers to deallog.

Definition at line 203 of file subscriptor.cc.

◆ serialize()

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

Read or write the data of this object to or from a stream for the purpose of serialization using the BOOST serialization library.

This function does not actually serialize any of the member variables of this class. The reason is that what this class stores is only who subscribes to this object, but who does so at the time of storing the contents of this object does not necessarily have anything to do with who subscribes to the object when it is restored. Consequently, we do not want to overwrite the subscribers at the time of restoring, and then there is no reason to write the subscribers out in the first place.

Definition at line 309 of file subscriptor.h.

◆ check_no_subscribers()

void Subscriptor::check_no_subscribers ( ) const
privatenoexceptinherited

Check that there are no objects subscribing to this object. If this check passes then it is safe to destroy the current object. It this check fails then this function will either abort or print an error message to deallog (by using the AssertNothrow mechanism), but will not throw an exception.

Note
Since this function is just a consistency check it does nothing in release mode.
If this function is called when there is an uncaught exception then, rather than aborting, this function prints an error message to the standard error stream and returns.

Definition at line 52 of file subscriptor.cc.

Member Data Documentation

◆ trilinos_matrix

std::shared_ptr<SparseMatrix> TrilinosWrappers::PreconditionAMGMueLu::trilinos_matrix
private

A copy of the deal.II matrix into Trilinos format.

Definition at line 1925 of file trilinos_precondition.h.

◆ preconditioner

Teuchos::RCP<Epetra_Operator> TrilinosWrappers::PreconditionBase::preconditioner
protectedinherited

This is a pointer to the preconditioner object that is used when applying the preconditioner.

Definition at line 222 of file trilinos_precondition.h.

◆ communicator

Epetra_MpiComm TrilinosWrappers::PreconditionBase::communicator
protectedinherited

Internal communication pattern in case the matrix needs to be copied from deal.II format.

Definition at line 228 of file trilinos_precondition.h.

◆ counter

std::atomic<unsigned int> Subscriptor::counter
mutableprivateinherited

Store the number of objects which subscribed to this object. Initially, this number is zero, and upon destruction it shall be zero again (i.e. all objects which subscribed should have unsubscribed again).

The creator (and owner) of an object is counted in the map below if HE manages to supply identification.

We use the mutable keyword in order to allow subscription to constant objects also.

This counter may be read from and written to concurrently in multithreaded code: hence we use the std::atomic class template.

Definition at line 218 of file subscriptor.h.

◆ counter_map

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

In this map, we count subscriptions for each different identification string supplied to subscribe().

Definition at line 224 of file subscriptor.h.

◆ validity_pointers

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

In this vector, we store pointers to the validity bool in the SmartPointer objects that subscribe to this class.

Definition at line 240 of file subscriptor.h.

◆ object_info

const std::type_info* Subscriptor::object_info
mutableprivateinherited

Pointer to the typeinfo object of this object, from which we can later deduce the class name. Since this information on the derived class is neither available in the destructor, nor in the constructor, we obtain it in between and store it here.

Definition at line 248 of file subscriptor.h.

◆ mutex

std::mutex Subscriptor::mutex
staticprivateinherited

A mutex used to ensure data consistency when accessing the mutable members of this class. This lock is used in the subscribe() and unsubscribe() functions, as well as in list_subscribers().

Definition at line 271 of file subscriptor.h.

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