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Belos::FixedPointIter< ScalarType, MV, OP > Class Template Reference

This class implements the preconditioned fixed point iteration. More...

#include <BelosFixedPointIter.hpp>

Inheritance diagram for Belos::FixedPointIter< ScalarType, MV, OP >:
Inheritance graph
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Public Types

typedef MultiVecTraits
< ScalarType, MV > 		MVT
 
typedef OperatorTraits
< ScalarType, MV, OP > 		OPT
 
typedef Teuchos::ScalarTraits
< ScalarType > 		SCT
 
typedef SCT::magnitudeType MagnitudeType
 

Private Member Functions

void setStateSize ()
 Method for initalizing the state storage needed by FixedPoint. More...
 

Private Attributes

const Teuchos::RCP
< LinearProblem< ScalarType,
MV, OP > > 		lp_
 
const Teuchos::RCP
< OutputManager< ScalarType > > 		om_
 
const Teuchos::RCP< StatusTest
< ScalarType, MV, OP > > 		stest_
 
int numRHS_
 
bool initialized_
 
bool stateStorageInitialized_
 
int iter_
 
Teuchos::RCP< MV > R_
 
Teuchos::RCP< MV > Z_
 

Constructors/Destructor

 FixedPointIter (const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &problem, const Teuchos::RCP< OutputManager< ScalarType > > &printer, const Teuchos::RCP< StatusTest< ScalarType, MV, OP > > &tester, Teuchos::ParameterList &params)
 FixedPointIter constructor with linear problem, solver utilities, and parameter list of solver options. More...
 
virtual ~FixedPointIter ()
 Destructor. More...
 

Solver methods

void iterate ()
 This method performs Fixed Point iterations until the status test indicates the need to stop or an error occurs (in which case, an std::exception is thrown). More...
 
void initializeFixedPoint (FixedPointIterationState< ScalarType, MV > &newstate)
 Initialize the solver to an iterate, providing a complete state. More...
 
void initialize ()
 Initialize the solver with the initial vectors from the linear problem or random data. More...
 
FixedPointIterationState
< ScalarType, MV > 		getState () const
 Get the current state of the linear solver. More...
 

Status methods

int getNumIters () const
 Get the current iteration count. More...
 
void resetNumIters (int iter=0)
 Reset the iteration count. More...
 
Teuchos::RCP< const MV > getNativeResiduals (std::vector< MagnitudeType > *) const
 Get the norms of the residuals native to the solver. More...
 
Teuchos::RCP< MV > getCurrentUpdate () const
 Get the current update to the linear system. More...
 

Accessor methods

const LinearProblem
< ScalarType, MV, OP > & 		getProblem () const
 Get a constant reference to the linear problem. More...
 
int getBlockSize () const
 Get the blocksize to be used by the iterative solver in solving this linear problem. More...
 
void setBlockSize (int blockSize)
 Set the blocksize to be used by the iterative solver in solving this linear problem. More...
 
bool isInitialized ()
 States whether the solver has been initialized or not. More...
 

Detailed Description

template<class ScalarType, class MV, class OP>
class Belos::FixedPointIter< ScalarType, MV, OP >

This class implements the preconditioned fixed point iteration.

Definition at line 45 of file BelosFixedPointIter.hpp.

Member Typedef Documentation

template<class ScalarType , class MV , class OP >
typedef MultiVecTraits<ScalarType,MV> Belos::FixedPointIter< ScalarType, MV, OP >::MVT

Definition at line 52 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
typedef OperatorTraits<ScalarType,MV,OP> Belos::FixedPointIter< ScalarType, MV, OP >::OPT

Definition at line 53 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
typedef Teuchos::ScalarTraits<ScalarType> Belos::FixedPointIter< ScalarType, MV, OP >::SCT

Definition at line 54 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
typedef SCT::magnitudeType Belos::FixedPointIter< ScalarType, MV, OP >::MagnitudeType

Definition at line 55 of file BelosFixedPointIter.hpp.

Constructor & Destructor Documentation

template<class ScalarType , class MV , class OP >
Belos::FixedPointIter< ScalarType, MV, OP >::FixedPointIter ( const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &  problem,
const Teuchos::RCP< OutputManager< ScalarType > > &  printer,
const Teuchos::RCP< StatusTest< ScalarType, MV, OP > > &  tester,
Teuchos::ParameterList &  params 
)

FixedPointIter constructor with linear problem, solver utilities, and parameter list of solver options.

This constructor takes pointers required by the linear solver iteration, in addition to a parameter list of options for the linear solver.

Definition at line 221 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
virtual Belos::FixedPointIter< ScalarType, MV, OP >::~FixedPointIter ( )
inlinevirtual

Destructor.

Definition at line 71 of file BelosFixedPointIter.hpp.

Member Function Documentation

template<class ScalarType , class MV , class OP >
void Belos::FixedPointIter< ScalarType, MV, OP >::iterate ( )
virtual

This method performs Fixed Point iterations until the status test indicates the need to stop or an error occurs (in which case, an std::exception is thrown).

iterate() will first determine whether the solver is initialized; if not, it will call initialize() using default arguments. After initialization, the solver performs FixedPoint iterations until the status test evaluates as Passed, at which point the method returns to the caller.

The status test is queried at the beginning of the iteration.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 345 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::FixedPointIter< ScalarType, MV, OP >::initializeFixedPoint ( FixedPointIterationState< ScalarType, MV > &  newstate)
virtual

Initialize the solver to an iterate, providing a complete state.

The FixedPointIter contains a certain amount of state, consisting of the current residual, preconditioned residual, and decent direction.

initialize() gives the user the opportunity to manually set these, although only the current unpreconditioned residual is required.

Postcondition
isInitialized() == true (see post-conditions of isInitialize())
Note
For any pointer in newstate which directly points to the multivectors in the solver, the data is not copied.

Implements Belos::FixedPointIteration< ScalarType, MV, OP >.

Definition at line 299 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::FixedPointIter< ScalarType, MV, OP >::initialize ( )
inlinevirtual

Initialize the solver with the initial vectors from the linear problem or random data.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 111 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
FixedPointIterationState<ScalarType,MV> Belos::FixedPointIter< ScalarType, MV, OP >::getState ( ) const
inlinevirtual

Get the current state of the linear solver.

The data is only valid if isInitialized() == true.

Returns
A FixedPointIterationState object containing const pointers to the current solver state.

Implements Belos::FixedPointIteration< ScalarType, MV, OP >.

Definition at line 123 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::FixedPointIter< ScalarType, MV, OP >::getNumIters ( ) const
inlinevirtual

Get the current iteration count.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 137 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::FixedPointIter< ScalarType, MV, OP >::resetNumIters ( int  iter = 0)
inlinevirtual

Reset the iteration count.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 140 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<const MV> Belos::FixedPointIter< ScalarType, MV, OP >::getNativeResiduals ( std::vector< MagnitudeType > *  ) const
inline

Get the norms of the residuals native to the solver.

Returns
A std::vector of length blockSize containing the native residuals.

Definition at line 144 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::FixedPointIter< ScalarType, MV, OP >::getCurrentUpdate ( ) const
inlinevirtual

Get the current update to the linear system.

Note
This method returns a null pointer because the linear problem is current.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 149 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
const LinearProblem<ScalarType,MV,OP>& Belos::FixedPointIter< ScalarType, MV, OP >::getProblem ( ) const
inlinevirtual

Get a constant reference to the linear problem.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 157 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::FixedPointIter< ScalarType, MV, OP >::getBlockSize ( ) const
inlinevirtual

Get the blocksize to be used by the iterative solver in solving this linear problem.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 160 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::FixedPointIter< ScalarType, MV, OP >::setBlockSize ( int  blockSize)
virtual

Set the blocksize to be used by the iterative solver in solving this linear problem.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 271 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
bool Belos::FixedPointIter< ScalarType, MV, OP >::isInitialized ( )
inlinevirtual

States whether the solver has been initialized or not.

Implements Belos::Iteration< ScalarType, MV, OP >.

Definition at line 166 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::FixedPointIter< ScalarType, MV, OP >::setStateSize ( )
private

Method for initalizing the state storage needed by FixedPoint.

Definition at line 239 of file BelosFixedPointIter.hpp.

Member Data Documentation

template<class ScalarType , class MV , class OP >
const Teuchos::RCP<LinearProblem<ScalarType,MV,OP> > Belos::FixedPointIter< ScalarType, MV, OP >::lp_
private

Definition at line 181 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
const Teuchos::RCP<OutputManager<ScalarType> > Belos::FixedPointIter< ScalarType, MV, OP >::om_
private

Definition at line 182 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
const Teuchos::RCP<StatusTest<ScalarType,MV,OP> > Belos::FixedPointIter< ScalarType, MV, OP >::stest_
private

Definition at line 183 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::FixedPointIter< ScalarType, MV, OP >::numRHS_
private

Definition at line 188 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
bool Belos::FixedPointIter< ScalarType, MV, OP >::initialized_
private

Definition at line 196 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
bool Belos::FixedPointIter< ScalarType, MV, OP >::stateStorageInitialized_
private

Definition at line 201 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::FixedPointIter< ScalarType, MV, OP >::iter_
private

Definition at line 204 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::FixedPointIter< ScalarType, MV, OP >::R_
private

Definition at line 210 of file BelosFixedPointIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::FixedPointIter< ScalarType, MV, OP >::Z_
private

Definition at line 213 of file BelosFixedPointIter.hpp.

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