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Reference documentation for deal.II version 8.1.0
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#include <petsc_precondition.h>
Classes | |
struct | AdditionalData |
Public Member Functions | |
PreconditionBlockJacobi () | |
PreconditionBlockJacobi (const MatrixBase &matrix, const AdditionalData &additional_data=AdditionalData()) | |
void | initialize (const MatrixBase &matrix, const AdditionalData &additional_data=AdditionalData()) |
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PreconditionerBase () | |
virtual | ~PreconditionerBase () |
void | vmult (VectorBase &dst, const VectorBase &src) const |
const PC & | get_pc () const |
Protected Attributes | |
AdditionalData | additional_data |
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PC | pc |
Mat | matrix |
Additional Inherited Members | |
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void | create_pc () |
operator Mat () const | |
A class that implements the interface to use the PETSc Block Jacobi preconditioner. The blocking structure of the matrix is determined by the association of degrees of freedom to the individual processors in an MPI-parallel job. If you use this preconditioner on a sequential job (or an MPI job with only one process) then the entire matrix is the only block.
By default, PETSc uses an ILU(0) decomposition of each diagonal block of the matrix for preconditioning. This can be changed, as is explained in the relevant section of the PETSc manual, but is not implemented here.
See the comment in the base class PreconditionerBase for when this preconditioner may or may not work.
Definition at line 201 of file petsc_precondition.h.
PETScWrappers::PreconditionBlockJacobi::PreconditionBlockJacobi | ( | ) |
Empty Constructor. You need to call initialize() before using this object.
PETScWrappers::PreconditionBlockJacobi::PreconditionBlockJacobi | ( | const MatrixBase & | matrix, |
const AdditionalData & | additional_data = AdditionalData() |
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Constructor. Take the matrix which is used to form the preconditioner, and additional flags if there are any.
void PETScWrappers::PreconditionBlockJacobi::initialize | ( | const MatrixBase & | matrix, |
const AdditionalData & | additional_data = AdditionalData() |
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Initializes 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.
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protected |
Store a copy of the flags for this particular preconditioner.
Definition at line 247 of file petsc_precondition.h.