preCICE v3.2.0
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precice::acceleration::impl::ValuePreconditioner Class Reference

Preconditioner that uses the values from the previous time window to scale the quasi-Newton system. More...

#include <ValuePreconditioner.hpp>

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Collaboration diagram for precice::acceleration::impl::ValuePreconditioner:
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Public Member Functions

 ValuePreconditioner (int maxNonConstTimeWindows)
 ~ValuePreconditioner () override=default
 Destructor, empty.
Public Member Functions inherited from precice::acceleration::impl::Preconditioner
 Preconditioner (int maxNonConstTimeWindows)
virtual ~Preconditioner ()=default
 Destructor, empty.
virtual void initialize (std::vector< size_t > &svs)
 initialize the preconditioner
void apply (Eigen::MatrixXd &M, bool transpose)
 Apply preconditioner to matrix.
void revert (Eigen::MatrixXd &M, bool transpose)
 Apply inverse preconditioner to matrix.
void apply (Eigen::MatrixXd &M)
 To transform physical values to balanced values. Matrix version.
void apply (Eigen::VectorXd &v)
 To transform physical values to balanced values. Vector version.
void revert (Eigen::MatrixXd &M)
 To transform balanced values back to physical values. Matrix version.
void revert (Eigen::VectorXd &v)
 To transform balanced values back to physical values. Vector version.
void update (bool timeWindowComplete, const Eigen::VectorXd &oldValues, const Eigen::VectorXd &res)
 Update the scaling after every FSI iteration and require a new QR decomposition (if necessary)
bool requireNewQR ()
 returns true if a QR decomposition from scratch is necessary
void newQRfulfilled ()
 to tell the preconditioner that QR-decomposition has been recomputed
std::vector< double > & getWeights ()
bool isConst ()

Private Member Functions

void _update_ (bool timeWindowComplete, const Eigen::VectorXd &oldValues, const Eigen::VectorXd &res) override
 Update the scaling after every FSI iteration.

Private Attributes

logging::Logger _log {"acceleration::ValuePreconditioner"}
bool _firstTimeWindow = true

Additional Inherited Members

Protected Attributes inherited from precice::acceleration::impl::Preconditioner
std::vector< double > _weights
 Weights used to scale the matrix V and the residual.
std::vector< double > _invWeights
 Inverse weights (for efficiency reasons)
std::vector< size_t > _subVectorSizes
 Sizes of each sub-vector, i.e. each coupling data.
int _maxNonConstTimeWindows
 maximum number of non-const time windows, i.e., after this number of time windows, the preconditioner is frozen with the current weights and becomes a constant preconditioner
int _nbNonConstTimeWindows = 0
 Counts the number of completed time windows with a non-const weighting.
bool _requireNewQR = false
 True if a QR decomposition from scratch is necessary.
bool _frozen = false
 True if _nbNonConstTimeWindows >= _maxNonConstTimeWindows, i.e., preconditioner is not updated any more.

Detailed Description

Preconditioner that uses the values from the previous time window to scale the quasi-Newton system.

Definition at line 11 of file ValuePreconditioner.hpp.

Constructor & Destructor Documentation

◆ ValuePreconditioner()

precice::acceleration::impl::ValuePreconditioner::ValuePreconditioner ( int maxNonConstTimeWindows)

Definition at line 10 of file ValuePreconditioner.cpp.

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◆ ~ValuePreconditioner()

precice::acceleration::impl::ValuePreconditioner::~ValuePreconditioner ( )
overridedefault

Destructor, empty.

Member Function Documentation

◆ _update_()

void precice::acceleration::impl::ValuePreconditioner::_update_ ( bool timeWindowComplete,
const Eigen::VectorXd & oldValues,
const Eigen::VectorXd & res )
overrideprivatevirtual

Update the scaling after every FSI iteration.

Parameters
[in]timeWindowCompleteTrue if this FSI iteration also completed a time window

Implements precice::acceleration::impl::Preconditioner.

Definition at line 16 of file ValuePreconditioner.cpp.

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Member Data Documentation

◆ _firstTimeWindow

bool precice::acceleration::impl::ValuePreconditioner::_firstTimeWindow = true
private

Definition at line 30 of file ValuePreconditioner.hpp.

◆ _log

logging::Logger precice::acceleration::impl::ValuePreconditioner::_log {"acceleration::ValuePreconditioner"}
private

Definition at line 21 of file ValuePreconditioner.hpp.


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