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Reference documentation for deal.II version 8.4.2
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Reference documentation for deal.II version 8.4.2
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#include <deal.II/lac/trilinos_precondition.h>
Classes | |
| struct | AdditionalData |
Public Member Functions | |
| void | initialize (const SparseMatrix &matrix, const AdditionalData &additional_data=AdditionalData()) |
 Public Member Functions inherited from TrilinosWrappers::PreconditionBase | |
| PreconditionBase () | |
| PreconditionBase (const PreconditionBase &) | |
| ~PreconditionBase () | |
| void | clear () |
| virtual void | vmult (VectorBase &dst, const VectorBase &src) const |
| virtual void | Tvmult (VectorBase &dst, const VectorBase &src) const |
| virtual void | vmult (::Vector< double > &dst, const ::Vector< double > &src) const |
| virtual void | Tvmult (::Vector< double > &dst, const ::Vector< double > &src) const |
| virtual void | vmult (::parallel::distributed::Vector< double > &dst, const ::parallel::distributed::Vector< double > &src) const |
| virtual void | Tvmult (::parallel::distributed::Vector< double > &dst, const ::parallel::distributed::Vector< double > &src) const |
| Epetra_Operator & | trilinos_operator () const |
| DeclException1 (ExcNonMatchingMaps, std::string,<< "The sparse matrix the preconditioner is based on "<< "uses a map that is not compatible to the one in vector "<< arg1<< ". Check preconditioner and matrix setup.") | |
| Public Member Functions inherited from Subscriptor | |
| Subscriptor () | |
| Subscriptor (const Subscriptor &) | |
| virtual | ~Subscriptor () |
| Subscriptor & | operator= (const Subscriptor &) |
| void | subscribe (const char *identifier=0) const |
| void | unsubscribe (const char *identifier=0) const |
| unsigned int | n_subscriptions () const |
| void | list_subscribers () const |
| DeclException3 (ExcInUse, int, char *, std::string &,<< "Object of class "<< arg2<< " is still used by "<< arg1<< " other objects."<< "\"<< "(Additional information: "<< arg3<< ")\"<< "See the entry in the Frequently Asked Questions of "<< "deal.II (linked to from http://www.dealii.org/) for "<< "a lot more information on what this error means and "<< "how to fix programs in which it happens.") | |
| DeclException2 (ExcNoSubscriber, char *, char *,<< "No subscriber with identifier <"<< arg2<< "> subscribes to this object of class "<< arg1<< ". Consequently, it cannot be unsubscribed.") | |
| template<class Archive > | |
| void | serialize (Archive &ar, const unsigned int version) |
Additional Inherited Members | |
| Public Types inherited from TrilinosWrappers::PreconditionBase | |
| typedef ::types::global_dof_index | size_type |
| Protected Attributes inherited from TrilinosWrappers::PreconditionBase | |
| std_cxx11::shared_ptr< Epetra_Operator > | preconditioner |
| Epetra_MpiComm | communicator |
| std_cxx11::shared_ptr< Epetra_Map > | vector_distributor |
A wrapper class for a block SSOR preconditioner for Trilinos matrices. As opposed to PreconditionSSOR where each row is treated separately (point- wise), this scheme collects block of a given size and inverts a full matrix for all these rows simultaneously. Trilinos allows to select several strategies for selecting which rows form a block, including "linear" (i.e., divide the local range of the matrix in slices of the block size), "greedy" or "metis".
The AdditionalData data structure allows to set preconditioner options.
Note that a parallel application of this preconditioner is actually a block-Jacobi preconditioner with (outer) block size equal to the local matrix size. Spoken more technically, this parallel operation is an additive Schwarz method with a block SSOR approximate solve as inner solver, based on the outer parallel partitioning.
Definition at line 585 of file trilinos_precondition.h.
| void PreconditionBlockSSOR< MatrixType, inverse_type >::initialize | ( | const SparseMatrix & | matrix, |
| const AdditionalData & | additional_data = AdditionalData() |
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| ) |
Take the sparse matrix the preconditioner object should be built of, and additional flags (damping parameter, overlap in parallel computations, etc.) if there are any.
Definition at line 311 of file trilinos_precondition.cc.
1.8.12