TrilinosWrappers::SolverDirect Class Reference

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

Inheritance diagram for TrilinosWrappers::SolverDirect:

Classes
struct	AdditionalData

Public Member Functions
	SolverDirect (const AdditionalData &data=AdditionalData())
	SolverDirect (SolverControl &cn, const AdditionalData &data=AdditionalData())
virtual	~SolverDirect ()=default
void	initialize (const SparseMatrix &A)
void	initialize (const SparseMatrix &A, const AdditionalData &data)
void	solve (MPI::Vector &x, const MPI::Vector &b)
void	solve (::LinearAlgebra::distributed::Vector< double > &x, const ::LinearAlgebra::distributed::Vector< double > &b)
void	vmult (MPI::Vector &x, const MPI::Vector &b) const
void	vmult (::LinearAlgebra::distributed::Vector< double > &x, const ::LinearAlgebra::distributed::Vector< double > &b) const
void	solve (const SparseMatrix &A, MPI::Vector &x, const MPI::Vector &b)
void	solve (const SparseMatrix &A, ::Vector< double > &x, const ::Vector< double > &b)
void	solve (const SparseMatrix &A, ::LinearAlgebra::distributed::Vector< double > &x, const ::LinearAlgebra::distributed::Vector< double > &b)
SolverControl &	control () const
template<class Archive >
void	serialize (Archive &ar, const unsigned int version)
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 &	ExcTrilinosError (int arg1)
static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)
static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

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

Private Member Functions
void	do_solve ()
void	check_no_subscribers () const noexcept

Private Attributes
SolverControl	solver_control_own
SolverControl &	solver_control
std::unique_ptr< Epetra_LinearProblem >	linear_problem
std::unique_ptr< Amesos_BaseSolver >	solver
AdditionalData	additional_data
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

An implementation of Trilinos direct solvers (using the Amesos package). The data field AdditionalData::solver_type can be used to specify the type of solver. It allows the use of built-in solvers Amesos_Klu as well as third-party solvers Amesos_Superludist or Amesos_Mumps.

For instructions on how to install Trilinos for use with direct solvers other than KLU, see the link to the Trilinos installation instructions linked to from the deal.II ReadMe file.

Definition at line 485 of file trilinos_solver.h.

Member Typedef Documentation

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

SolverDirect() [1/2]

TrilinosWrappers::SolverDirect::SolverDirect ( const AdditionalData & data = AdditionalData() )

explicit

Constructor. Creates the solver without solver control object.

Definition at line 639 of file trilinos_solver.cc.

SolverDirect() [2/2]

TrilinosWrappers::SolverDirect::SolverDirect	(	SolverControl &	cn,
		const AdditionalData &	data = AdditionalData() )

Constructor. Takes the solver control object and creates the solver.

Definition at line 646 of file trilinos_solver.cc.

~SolverDirect()

virtual TrilinosWrappers::SolverDirect::~SolverDirect ( )

virtualdefault

Destructor.

Member Function Documentation

initialize() [1/2]

void TrilinosWrappers::SolverDirect::initialize

(

const SparseMatrix &

A

)

Initializes the direct solver for the matrix A and creates a factorization for it with the package chosen from the additional data structure. Note that there is no need for a preconditioner here and solve() is not called.

Definition at line 662 of file trilinos_solver.cc.

initialize() [2/2]

void TrilinosWrappers::SolverDirect::initialize	(	const SparseMatrix &	A,
		const AdditionalData &	data )

Initializes the direct solver for the matrix A and creates a factorization for it with the package chosen from the additional data structure. Note that there is no need for a preconditioner here and solve() is not called. Furthermore, data replaces the data stored in this instance.

Definition at line 708 of file trilinos_solver.cc.

solve() [1/5]

void TrilinosWrappers::SolverDirect::solve	(	MPI::Vector &	x,
		const MPI::Vector &	b )

Solve the linear system Ax=b based on the package set in the constructor on initialize(). Note the matrix is not refactored during this call.

Definition at line 717 of file trilinos_solver.cc.

solve() [2/5]

void TrilinosWrappers::SolverDirect::solve	(	::LinearAlgebra::distributed::Vector< double > &	x,
		const ::LinearAlgebra::distributed::Vector< double > &	b )

Solve the linear system Ax=b based on the package set in initialize() for deal.II's own parallel vectors. Note the matrix is not refactored during this call.

Definition at line 725 of file trilinos_solver.cc.

vmult() [1/2]

void TrilinosWrappers::SolverDirect::vmult	(	MPI::Vector &	x,
		const MPI::Vector &	b ) const

Solve the linear system Ax=b based on the package set in the constructor or initialize(). Note the matrix is not refactored during this call.

Definition at line 734 of file trilinos_solver.cc.

vmult() [2/2]

void TrilinosWrappers::SolverDirect::vmult	(	::LinearAlgebra::distributed::Vector< double > &	x,
		const ::LinearAlgebra::distributed::Vector< double > &	b ) const

Solve the linear system Ax=b based on the package set in initialize() for deal.II's own parallel vectors. Note the matrix is not refactored during this call.

Definition at line 762 of file trilinos_solver.cc.

solve() [3/5]

void TrilinosWrappers::SolverDirect::solve	(	const SparseMatrix &	A,
		MPI::Vector &	x,
		const MPI::Vector &	b )

Solve the linear system Ax=b. Creates a factorization of the matrix with the package chosen from the additional data structure and performs the solve. Note that there is no need for a preconditioner here.

Definition at line 848 of file trilinos_solver.cc.

solve() [4/5]

void TrilinosWrappers::SolverDirect::solve	(	const SparseMatrix &	A,
		::Vector< double > &	x,
		const ::Vector< double > &	b )

Solve the linear system Ax=b. This class works with Trilinos matrices, but takes deal.II serial vectors as argument. Since these vectors are not distributed, this function does only what you expect in case the matrix is serial (i.e., locally owned). Otherwise, an exception will be thrown.

Definition at line 865 of file trilinos_solver.cc.

solve() [5/5]

void TrilinosWrappers::SolverDirect::solve	(	const SparseMatrix &	A,
		::LinearAlgebra::distributed::Vector< double > &	x,
		const ::LinearAlgebra::distributed::Vector< double > &	b )

Solve the linear system Ax=b for deal.II's own parallel vectors. Creates a factorization of the matrix with the package chosen from the additional data structure and performs the solve. Note that there is no need for a preconditioner here.

Definition at line 891 of file trilinos_solver.cc.

control()

SolverControl & TrilinosWrappers::SolverDirect::control

(

)

const

Access to object that controls convergence.

Definition at line 654 of file trilinos_solver.cc.

do_solve()

void TrilinosWrappers::SolverDirect::do_solve ( )

private

Actually performs the operations for solving the linear system, including the factorization and forward and backward substitution.

Definition at line 797 of file trilinos_solver.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

solver_control_own

SolverControl TrilinosWrappers::SolverDirect::solver_control_own

private

Local dummy solver control object.

Definition at line 653 of file trilinos_solver.h.

solver_control

SolverControl& TrilinosWrappers::SolverDirect::solver_control

private

Reference to the object that controls convergence of the iterative solver. In fact, for these Trilinos wrappers, Trilinos does so itself, but we copy the data from this object before starting the solution process, and copy the data back into it afterwards.

Definition at line 661 of file trilinos_solver.h.

linear_problem

std::unique_ptr<Epetra_LinearProblem> TrilinosWrappers::SolverDirect::linear_problem

private

A structure that collects the Trilinos sparse matrix, the right hand side vector and the solution vector, which is passed down to the Trilinos solver.

Definition at line 668 of file trilinos_solver.h.

solver

std::unique_ptr<Amesos_BaseSolver> TrilinosWrappers::SolverDirect::solver

private

A structure that contains the Trilinos solver and preconditioner objects.

Definition at line 674 of file trilinos_solver.h.

additional_data

AdditionalData TrilinosWrappers::SolverDirect::additional_data

private

Store a copy of the flags for this particular solver.

Definition at line 679 of file trilinos_solver.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.

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

• include/deal.II/lac/trilinos_solver.h
• source/lac/trilinos_solver.cc