Reference documentation for deal.II version GIT f24ba87524 2022-11-27 03:40:02+00:00
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Classes | Public Member Functions | Static Public Member Functions | Protected Member Functions | Protected Attributes | Private Types | Private Member Functions | Private Attributes | Static Private Attributes | List of all members
PETScWrappers::PreconditionBDDC< dim > Class Template Reference

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

Inheritance diagram for PETScWrappers::PreconditionBDDC< dim >:
[legend]

Classes

struct  AdditionalData
 

Public Member Functions

 PreconditionBDDC ()=default
 
 PreconditionBDDC (const MatrixBase &matrix, const AdditionalData &additional_data=AdditionalData())
 
 PreconditionBDDC (const MPI_Comm communicator, const AdditionalData &additional_data=AdditionalData())
 
void initialize (const MatrixBase &matrix, const AdditionalData &additional_data=AdditionalData())
 
void clear ()
 
void vmult (VectorBase &dst, const VectorBase &src) const
 
void Tvmult (VectorBase &dst, const VectorBase &src) const
 
const PC & get_pc () const
 
MPI_Comm get_mpi_communicator () 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 ::ExceptionBaseExcInUse (int arg1, std::string arg2, std::string arg3)
 
static ::ExceptionBaseExcNoSubscriber (std::string arg1, std::string arg2)
 

Protected Member Functions

void initialize ()
 
void create_pc ()
 
 operator Mat () const
 

Protected Attributes

AdditionalData additional_data
 
MPI_Comm mpi_communicator
 
PC pc
 
Mat matrix
 

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::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

template<int dim>
class PETScWrappers::PreconditionBDDC< dim >

A class that implements the interface to use the BDDC preconditioner from PETSc (PCBDDC), which is a two-level, substructuring, non-overlapping domain decomposition preconditioner. Details of the implementation can be found in "S Zampini, SISC (2016)". It mainly consists of two elements:

The size of the primal space is determined through the AdditionalData parameters. A thorough study of the performance of this solver in the context of cardiac mechanics, together with further details on this interface, is available in [12].

Definition at line 997 of file petsc_precondition.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 230 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 235 of file subscriptor.h.

Constructor & Destructor Documentation

◆ PreconditionBDDC() [1/3]

template<int dim>
PETScWrappers::PreconditionBDDC< dim >::PreconditionBDDC ( )
default

Empty Constructor. You need to call initialize() before using this object.

◆ PreconditionBDDC() [2/3]

template<int dim>
PETScWrappers::PreconditionBDDC< dim >::PreconditionBDDC ( const MatrixBase matrix,
const AdditionalData additional_data = AdditionalData() 
)

Constructor. Take the matrix which is used to form the preconditioner, and additional flags if there are any.

Definition at line 951 of file petsc_precondition.cc.

◆ PreconditionBDDC() [3/3]

template<int dim>
PETScWrappers::PreconditionBDDC< dim >::PreconditionBDDC ( const MPI_Comm  communicator,
const AdditionalData additional_data = AdditionalData() 
)

Same as above but without setting a matrix to form the preconditioner. Intended to be used with SLEPc objects.

Definition at line 935 of file petsc_precondition.cc.

Member Function Documentation

◆ initialize() [1/2]

template<int dim>
void PETScWrappers::PreconditionBDDC< dim >::initialize ( const MatrixBase matrix,
const AdditionalData additional_data = AdditionalData() 
)

Initialize the preconditioner object and calculate all data that is necessary for applying it in a solver. This function is automatically called when calling the constructor with the same arguments and is only used if you create the preconditioner without arguments.

Definition at line 1037 of file petsc_precondition.cc.

◆ initialize() [2/2]

template<int dim>
void PETScWrappers::PreconditionBDDC< dim >::initialize
protected

Initialize the preconditioner object without knowing a particular matrix. This function sets up appropriate parameters to the underlying PETSc object after it has been created.

Definition at line 962 of file petsc_precondition.cc.

◆ clear()

void PETScWrappers::PreconditionBase::clear ( )
inherited

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

Definition at line 62 of file petsc_precondition.cc.

◆ vmult()

void PETScWrappers::PreconditionBase::vmult ( VectorBase dst,
const VectorBase src 
) const
inherited

Apply the preconditioner once to the given src vector.

Definition at line 78 of file petsc_precondition.cc.

◆ Tvmult()

void PETScWrappers::PreconditionBase::Tvmult ( VectorBase dst,
const VectorBase src 
) const
inherited

Apply the transpose preconditioner once to the given src vector.

Definition at line 89 of file petsc_precondition.cc.

◆ get_pc()

const PC & PETScWrappers::PreconditionBase::get_pc ( ) const
inherited

Give access to the underlying PETSc object.

Definition at line 129 of file petsc_precondition.cc.

◆ get_mpi_communicator()

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

Return the MPI communicator object used by this preconditioner.

Definition at line 100 of file petsc_precondition.cc.

◆ create_pc()

void PETScWrappers::PreconditionBase::create_pc ( )
protectedinherited

Internal function to create the PETSc preconditioner object. Fails if called twice.

Definition at line 108 of file petsc_precondition.cc.

◆ operator Mat()

PETScWrappers::PreconditionBase::operator Mat ( ) const
protectedinherited

Conversion operator to get a representation of the matrix that represents this preconditioner. We use this inside the actual solver, where we need to pass this matrix to the PETSc solvers.

Definition at line 135 of file petsc_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 136 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 156 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 204 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 53 of file subscriptor.cc.

Member Data Documentation

◆ additional_data

template<int dim>
AdditionalData PETScWrappers::PreconditionBDDC< dim >::additional_data
protected

Store a copy of the flags for this particular preconditioner.

Definition at line 1082 of file petsc_precondition.h.

◆ mpi_communicator

MPI_Comm PETScWrappers::PreconditionBase::mpi_communicator
protectedinherited

The communicator to be used for this preconditioner.

Definition at line 116 of file petsc_precondition.h.

◆ pc

PC PETScWrappers::PreconditionBase::pc
protectedinherited

The PETSc preconditioner object

Definition at line 121 of file petsc_precondition.h.

◆ matrix

Mat PETScWrappers::PreconditionBase::matrix
protectedinherited

A pointer to the matrix that acts as a preconditioner.

Definition at line 126 of file petsc_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 219 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 225 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 241 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 249 of file subscriptor.h.

◆ mutex

std::mutex Subscriptor::mutex
staticprivateinherited

A mutex used to ensure data consistency when printing out the list of subscribers.

Definition at line 271 of file subscriptor.h.


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