PETScWrappers::PreconditionBoomerAMG Class Reference

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

Inheritance diagram for PETScWrappers::PreconditionBoomerAMG:

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())
Public Member Functions inherited from PETScWrappers::PreconditionerBase
	PreconditionerBase ()
virtual	~PreconditionerBase ()
void	clear ()
void	vmult (VectorBase &dst, const VectorBase &src) const
const PC &	get_pc () const

Protected Member Functions
void	initialize ()
Protected Member Functions inherited from PETScWrappers::PreconditionerBase
void	create_pc ()
	operator Mat () const

Protected Attributes
AdditionalData	additional_data
Protected Attributes inherited from PETScWrappers::PreconditionerBase
PC	pc
Mat	matrix

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.

Author

Timo Heister, 2010

Definition at line 681 of file petsc_precondition.h.

Constructor & Destructor Documentation

PETScWrappers::PreconditionBoomerAMG::PreconditionBoomerAMG ( )

default

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

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 462 of file petsc_precondition.cc.

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 442 of file petsc_precondition.cc.

Member Function Documentation

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 523 of file petsc_precondition.cc.

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 470 of file petsc_precondition.cc.

Member Data Documentation

AdditionalData PETScWrappers::PreconditionBoomerAMG::additional_data

protected

Store a copy of the flags for this particular preconditioner.

Definition at line 779 of file petsc_precondition.h.

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

• deal.II/lac/petsc_precondition.h
• /mnt/data/darndt/Sources/dealii-clang-6.0.0/source/lac/petsc_precondition.cc