Reference documentation for deal.II version GIT 969cfe8cd8 2022-06-28 20:20:01+00:00
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Classes | Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
PETScWrappers::PreconditionBoomerAMG Class Reference

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

Inheritance diagram for PETScWrappers::PreconditionBoomerAMG:
[legend]

Classes

struct  AdditionalData
 

Public Member Functions

 PreconditionBoomerAMG ()=default
 
 PreconditionBoomerAMG (const MatrixBase &matrix, const AdditionalData &additional_data=AdditionalData())
 
 PreconditionBoomerAMG (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
 

Protected Member Functions

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

Protected Attributes

AdditionalData additional_data
 
PC pc
 
Mat matrix
 

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)
 
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
 
static ::ExceptionBaseExcInUse (int arg1, std::string arg2, std::string arg3)
 
static ::ExceptionBaseExcNoSubscriber (std::string arg1, std::string arg2)
 
void check_no_subscribers () const noexcept
 

Detailed Description

A class that implements the interface to use the BoomerAMG algebraic multigrid preconditioner from the HYPRE suite. Note that PETSc has to be configured with HYPRE (e.g. with --download-hypre=1).

The preconditioner does support parallel distributed computations. See step-40 for an example.

Definition at line 612 of file petsc_precondition.h.

Constructor & Destructor Documentation

◆ PreconditionBoomerAMG() [1/3]

PETScWrappers::PreconditionBoomerAMG::PreconditionBoomerAMG ( )
default

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

◆ PreconditionBoomerAMG() [2/3]

PETScWrappers::PreconditionBoomerAMG::PreconditionBoomerAMG ( 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 521 of file petsc_precondition.cc.

◆ PreconditionBoomerAMG() [3/3]

PETScWrappers::PreconditionBoomerAMG::PreconditionBoomerAMG ( 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 501 of file petsc_precondition.cc.

Member Function Documentation

◆ initialize() [1/2]

void PETScWrappers::PreconditionBoomerAMG::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 637 of file petsc_precondition.cc.

◆ initialize() [2/2]

void PETScWrappers::PreconditionBoomerAMG::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 529 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 52 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 66 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 76 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 113 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 86 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 119 of file petsc_precondition.cc.

Member Data Documentation

◆ additional_data

AdditionalData PETScWrappers::PreconditionBoomerAMG::additional_data
protected

Store a copy of the flags for this particular preconditioner.

Definition at line 776 of file petsc_precondition.h.

◆ pc

PC PETScWrappers::PreconditionBase::pc
protectedinherited

the PETSc preconditioner object

Definition at line 101 of file petsc_precondition.h.

◆ matrix

Mat PETScWrappers::PreconditionBase::matrix
protectedinherited

A pointer to the matrix that acts as a preconditioner.

Definition at line 106 of file petsc_precondition.h.


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