Template Numerical Library: TNL::Solvers::StaticIterativeSolver< Real, Index

Base class for iterative solvers. More...

#include <TNL/Solvers/StaticIterativeSolver.h>

Inheritance diagram for TNL::Solvers::StaticIterativeSolver< Real, Index >:

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Collaboration diagram for TNL::Solvers::StaticIterativeSolver< Real, Index >:

Public Member Functions
__cuda_callable__	StaticIterativeSolver ()=default
	Default constructor.

__cuda_callable__ bool	checkConvergence ()
	Checks whether the convergence occurred already.

__cuda_callable__ bool	checkNextIteration ()
	Checks if the solver is allowed to do the next iteration.

__cuda_callable__ const Real &	getConvergenceResidue () const
	Gets the the convergence threshold.

__cuda_callable__ const Real &	getDivergenceResidue () const
	Gets the limit for the divergence criterion.

__cuda_callable__ const Index &	getIterations () const
	Gets the number of iterations performed by the solver so far.

__cuda_callable__ const Index &	getMaxIterations () const
	Gets the maximal number of iterations the solver is allowed to perform.

__cuda_callable__ const Index &	getMinIterations () const
	Gets the minimal number of iterations the solver is supposed to do.

__cuda_callable__ const Real &	getResidue () const
	Gets the residue reached at the current iteration.

__cuda_callable__ bool	nextIteration ()
	Proceeds to the next iteration.

__cuda_callable__ void	resetIterations ()
	Sets the the number of the current iterations to zero.

__cuda_callable__ void	setConvergenceResidue (const Real &convergenceResidue)
	Sets the threshold for the convergence.

__cuda_callable__ void	setDivergenceResidue (const Real &divergenceResidue)
	Sets the residue limit for the divergence criterion.

__cuda_callable__ void	setMaxIterations (const Index &maxIterations)
	Sets the maximal number of iterations the solver is allowed to perform.

__cuda_callable__ void	setMinIterations (const Index &minIterations)
	Sets the minimal number of iterations the solver is supposed to do.

__cuda_callable__ void	setResidue (const Real &residue)
	Sets the residue reached at the current iteration.

bool	setup (const Config::ParameterContainer &parameters, const std::string &prefix="")
	Method for setup of the iterative solver based on configuration parameters.

Static Public Member Functions
static void	configSetup (Config::ConfigDescription &config, const std::string &prefix="")
	This method defines configuration entries for setup of the iterative solver.

Protected Attributes
Real	convergenceResidue = 1e-6

Index	currentIteration = 0

Real	currentResidue = 0

Real	divergenceResidue = std::numeric_limits< Real >::max()

Index	maxIterations = 1000000000

Index	minIterations = 0

Index	refreshRate = 1

Detailed Description

template<typename Real, typename Index>
class TNL::Solvers::StaticIterativeSolver< Real, Index >

Base class for iterative solvers.

Template Parameters

Real	is a floating point type used for computations.
Index	is an indexing type.
IterativeSolverMonitor<	Real, Index > is type of an object used for monitoring of the convergence.

Member Function Documentation

◆ checkConvergence()

template<typename Real , typename Index >

__cuda_callable__ bool TNL::Solvers::StaticIterativeSolver< Real, Index >::checkConvergence ( )

Checks whether the convergence occurred already.

Returns: true if the convergence already occured.; false if the convergence did not occur yet.

◆ checkNextIteration()

template<typename Real , typename Index >

__cuda_callable__ bool TNL::Solvers::StaticIterativeSolver< Real, Index >::checkNextIteration ( )

Checks if the solver is allowed to do the next iteration.

Returns: true true if the solver is allowed to do the next iteration.; false if the solver is not allowed to do the next iteration. This may happen because the divergence occurred.

◆ configSetup()

template<typename Real , typename Index >

void TNL::Solvers::StaticIterativeSolver< Real, Index >::configSetup	(	Config::ConfigDescription &	config,
		const std::string &	prefix = "" )

static

This method defines configuration entries for setup of the iterative solver.

The following entries are defined:

max-iterations - maximal number of iterations the solver may perform.

min-iterations - minimal number of iterations the solver must perform.

convergence-residue - convergence occurs when the residue drops bellow this limit.

divergence-residue - divergence occurs when the residue exceeds given limit.

refresh-rate - number of milliseconds between solver monitor refreshes.

residual-history-file - path to the file where the residual history will be saved.

Parameters

config	contains description of configuration parameters.
prefix	is a prefix of particular configuration entries.

◆ getConvergenceResidue()

template<typename Real , typename Index >

__cuda_callable__ const Real & TNL::Solvers::StaticIterativeSolver< Real, Index >::getConvergenceResidue ( ) const

Gets the the convergence threshold.

See IterativeSolver::setConvergenceResidue.

Returns: the convergence threshold.

◆ getDivergenceResidue()

template<typename Real , typename Index >

__cuda_callable__ const Real & TNL::Solvers::StaticIterativeSolver< Real, Index >::getDivergenceResidue ( ) const

Gets the limit for the divergence criterion.

See IterativeSolver::setDivergenceResidue.

Returns: the residue limit fo the divergence.

◆ getIterations()

template<typename Real , typename Index >

__cuda_callable__ const Index & TNL::Solvers::StaticIterativeSolver< Real, Index >::getIterations ( ) const

Gets the number of iterations performed by the solver so far.

Returns: number of iterations performed so far.

◆ getMaxIterations()

template<typename Real , typename Index >

__cuda_callable__ const Index & TNL::Solvers::StaticIterativeSolver< Real, Index >::getMaxIterations ( ) const

Gets the maximal number of iterations the solver is allowed to perform.

See IterativeSolver::setMaxIterations.

Returns: maximal number of allowed iterations.

◆ getMinIterations()

template<typename Real , typename Index >

__cuda_callable__ const Index & TNL::Solvers::StaticIterativeSolver< Real, Index >::getMinIterations ( ) const

Gets the minimal number of iterations the solver is supposed to do.

Returns: minimal number of iterations the solver is supposed to do.

◆ getResidue()

template<typename Real , typename Index >

__cuda_callable__ const Real & TNL::Solvers::StaticIterativeSolver< Real, Index >::getResidue ( ) const

Gets the residue reached at the current iteration.

Returns: residue reached at the current iteration.

◆ nextIteration()

template<typename Real , typename Index >

__cuda_callable__ bool TNL::Solvers::StaticIterativeSolver< Real, Index >::nextIteration ( )

Proceeds to the next iteration.

Returns: true if the solver is allowed to do the next iteration.; false if the solver is not allowed to do the next iteration. This may happen because the divergence occurred.

◆ setConvergenceResidue()

template<typename Real , typename Index >

__cuda_callable__ void TNL::Solvers::StaticIterativeSolver< Real, Index >::setConvergenceResidue ( const Real & convergenceResidue )

Sets the threshold for the convergence.

The convergence occurs when the residue drops bellow this limit.

Parameters

convergenceResidue is threshold for the convergence.

◆ setDivergenceResidue()

template<typename Real , typename Index >

__cuda_callable__ void TNL::Solvers::StaticIterativeSolver< Real, Index >::setDivergenceResidue ( const Real & divergenceResidue )

Sets the residue limit for the divergence criterion.

The divergence occurs when the residue exceeds the limit.

Parameters

divergenceResidue the residue limit of the divergence.

◆ setMaxIterations()

template<typename Real , typename Index >

__cuda_callable__ void TNL::Solvers::StaticIterativeSolver< Real, Index >::setMaxIterations ( const Index & maxIterations )

Sets the maximal number of iterations the solver is allowed to perform.

If the number of iterations performed by the solver exceeds given limit, the divergence occurs.

Parameters

maxIterations maximal number of allowed iterations.

◆ setMinIterations()

template<typename Real , typename Index >

__cuda_callable__ void TNL::Solvers::StaticIterativeSolver< Real, Index >::setMinIterations ( const Index & minIterations )

Sets the minimal number of iterations the solver is supposed to do.

Parameters

minIterations minimal number of iterations the solver is supposed to do.

◆ setResidue()

template<typename Real , typename Index >

__cuda_callable__ void TNL::Solvers::StaticIterativeSolver< Real, Index >::setResidue ( const Real & residue )

Sets the residue reached at the current iteration.

Parameters

residue reached at the current iteration.

◆ setup()

template<typename Real , typename Index >

bool TNL::Solvers::StaticIterativeSolver< Real, Index >::setup	(	const Config::ParameterContainer &	parameters,
		const std::string &	prefix = "" )

Method for setup of the iterative solver based on configuration parameters.

Parameters

parameters	contains values of the define configuration entries.
prefix	is a prefix of particular configuration entries.

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

src/TNL/Solvers/StaticIterativeSolver.h
src/TNL/Solvers/StaticIterativeSolver.hpp

Public Member Functions

Static Public Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

◆ checkConvergence()

◆ checkNextIteration()

◆ configSetup()

◆ getConvergenceResidue()

◆ getDivergenceResidue()

◆ getIterations()

◆ getMaxIterations()

◆ getMinIterations()

◆ getResidue()

◆ nextIteration()

◆ setConvergenceResidue()

◆ setDivergenceResidue()

◆ setMaxIterations()

◆ setMinIterations()

◆ setResidue()

◆ setup()