Belos Package Browser (Single Doxygen Collection)  Development
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
Public Types | Private Attributes | List of all members
Belos::RCGIter< ScalarType, MV, OP > Class Template Reference

This class implements the RCG iteration, where a single-std::vector Krylov subspace is constructed. More...

#include <BelosRCGIter.hpp>

Inheritance diagram for Belos::RCGIter< ScalarType, MV, OP >:
Inheritance graph
[legend]

Public Types

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

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 numBlocks_
 
int recycleBlocks_
 
bool initialized_
 
int curDim_
 
int iter_
 
Teuchos::RCP< MV > P_
 
Teuchos::RCP< MV > Ap_
 
Teuchos::RCP< MV > r_
 
Teuchos::RCP< MV > z_
 
bool existU_
 
Teuchos::RCP< MV > U_
 
Teuchos::RCP< MV > AU_
 
Teuchos::RCP
< Teuchos::SerialDenseMatrix
< int, ScalarType > > 
Alpha_
 
Teuchos::RCP
< Teuchos::SerialDenseMatrix
< int, ScalarType > > 
Beta_
 
Teuchos::RCP
< Teuchos::SerialDenseMatrix
< int, ScalarType > > 
D_
 
Teuchos::RCP
< Teuchos::SerialDenseMatrix
< int, ScalarType > > 
Delta_
 
Teuchos::RCP
< Teuchos::SerialDenseMatrix
< int, ScalarType > > 
LUUTAU_
 
Teuchos::RCP< std::vector< int > > ipiv_
 
Teuchos::RCP
< Teuchos::SerialDenseMatrix
< int, ScalarType > > 
rTz_old_
 

Constructors/Destructor

 RCGIter (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)
 RCGIter constructor with linear problem, solver utilities, and parameter list of solver options. More...
 
virtual ~RCGIter ()
 Destructor. More...
 

Solver methods

void iterate ()
 This method performs RCG iterations until the status test indicates the need to stop or an error occurs (in which case, an std::exception is thrown). More...
 
void initialize (RCGIterState< 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...
 

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...
 
int getCurSubspaceDim () const
 Get the dimension of the search subspace used to generate the current solution to the linear problem. More...
 
int getMaxSubspaceDim () const
 Get the maximum dimension allocated for the search subspace. More...
 

Accessor methods

const LinearProblem
< ScalarType, MV, OP > & 
getProblem () const
 Get a constant reference to the linear problem. More...
 
int getNumBlocks () const
 Get the maximum number of blocks used by the iterative solver in solving this linear problem. More...
 
void setNumBlocks (int numBlocks)
 Set the maximum number of blocks used by the iterative solver. More...
 
int getRecycledBlocks () const
 Get the maximum number of recycled blocks used by the iterative solver in solving this linear problem. More...
 
void setRecycledBlocks (int recycleBlocks)
 Set the maximum number of recycled blocks used by the iterative solver. 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. More...
 
void setSize (int recycleBlocks, int numBlocks)
 Set the maximum number of blocks used by the iterative solver and the number of recycled vectors. More...
 
bool isInitialized ()
 States whether the solver has been initialized or not. More...
 

Detailed Description

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

This class implements the RCG iteration, where a single-std::vector Krylov subspace is constructed.

Author
Michael Parks and Heidi Thornquist

Definition at line 196 of file BelosRCGIter.hpp.

Member Typedef Documentation

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

Definition at line 203 of file BelosRCGIter.hpp.

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

Definition at line 204 of file BelosRCGIter.hpp.

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

Definition at line 205 of file BelosRCGIter.hpp.

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

Definition at line 206 of file BelosRCGIter.hpp.

Constructor & Destructor Documentation

template<class ScalarType , class MV , class OP >
Belos::RCGIter< ScalarType, MV, OP >::RCGIter ( 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 
)

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

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

  • "Num Blocks" - an int specifying the maximum number of blocks allocated for the solver basis. Default: 25
  • "Restart Timers" = a bool specifying whether the timers should be restarted each time iterate() is called. Default: false

Definition at line 412 of file BelosRCGIter.hpp.

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

Destructor.

Definition at line 224 of file BelosRCGIter.hpp.

Member Function Documentation

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

This method performs RCG 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 RCG 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 541 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::RCGIter< ScalarType, MV, OP >::initialize ( RCGIterState< ScalarType, MV > &  newstate)

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

The RCGIter 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.

Definition at line 457 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::RCGIter< 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 264 of file BelosRCGIter.hpp.

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

Get the current iteration count.

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

Definition at line 276 of file BelosRCGIter.hpp.

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

Reset the iteration count.

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

Definition at line 279 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<const MV> Belos::RCGIter< 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 283 of file BelosRCGIter.hpp.

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

Get the current update to the linear system.

Note
Some solvers, like GMRES, do not compute updates to the solution every iteration. This method forces its computation. Other solvers, like CG and RCG update the solution each iteration, so this method will return a zero std::vector indicating that the linear problem contains the current solution.

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

Definition at line 291 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::RCGIter< ScalarType, MV, OP >::getCurSubspaceDim ( ) const
inline

Get the dimension of the search subspace used to generate the current solution to the linear problem.

Definition at line 294 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::RCGIter< ScalarType, MV, OP >::getMaxSubspaceDim ( ) const
inline

Get the maximum dimension allocated for the search subspace.

Definition at line 300 of file BelosRCGIter.hpp.

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

Get a constant reference to the linear problem.

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

Definition at line 309 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::RCGIter< ScalarType, MV, OP >::getNumBlocks ( ) const
inline

Get the maximum number of blocks used by the iterative solver in solving this linear problem.

Definition at line 312 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::RCGIter< ScalarType, MV, OP >::setNumBlocks ( int  numBlocks)
inline

Set the maximum number of blocks used by the iterative solver.

Definition at line 315 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::RCGIter< ScalarType, MV, OP >::getRecycledBlocks ( ) const
inline

Get the maximum number of recycled blocks used by the iterative solver in solving this linear problem.

Definition at line 318 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::RCGIter< ScalarType, MV, OP >::setRecycledBlocks ( int  recycleBlocks)
inline

Set the maximum number of recycled blocks used by the iterative solver.

Definition at line 321 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::RCGIter< 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 324 of file BelosRCGIter.hpp.

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

Set the blocksize.

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

Definition at line 327 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
void Belos::RCGIter< ScalarType, MV, OP >::setSize ( int  recycleBlocks,
int  numBlocks 
)

Set the maximum number of blocks used by the iterative solver and the number of recycled vectors.

Definition at line 442 of file BelosRCGIter.hpp.

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

States whether the solver has been initialized or not.

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

Definition at line 336 of file BelosRCGIter.hpp.

Member Data Documentation

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

Definition at line 349 of file BelosRCGIter.hpp.

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

Definition at line 350 of file BelosRCGIter.hpp.

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

Definition at line 351 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::RCGIter< ScalarType, MV, OP >::numBlocks_
private

Definition at line 357 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::RCGIter< ScalarType, MV, OP >::recycleBlocks_
private

Definition at line 360 of file BelosRCGIter.hpp.

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

Definition at line 368 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
int Belos::RCGIter< ScalarType, MV, OP >::curDim_
private

Definition at line 371 of file BelosRCGIter.hpp.

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

Definition at line 371 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::RCGIter< ScalarType, MV, OP >::P_
private

Definition at line 377 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::RCGIter< ScalarType, MV, OP >::Ap_
private

Definition at line 380 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::RCGIter< ScalarType, MV, OP >::r_
private

Definition at line 383 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::RCGIter< ScalarType, MV, OP >::z_
private

Definition at line 386 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
bool Belos::RCGIter< ScalarType, MV, OP >::existU_
private

Definition at line 389 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::RCGIter< ScalarType, MV, OP >::U_
private

Definition at line 391 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<MV> Belos::RCGIter< ScalarType, MV, OP >::AU_
private

Definition at line 391 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<Teuchos::SerialDenseMatrix<int,ScalarType> > Belos::RCGIter< ScalarType, MV, OP >::Alpha_
private

Definition at line 394 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<Teuchos::SerialDenseMatrix<int,ScalarType> > Belos::RCGIter< ScalarType, MV, OP >::Beta_
private

Definition at line 394 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<Teuchos::SerialDenseMatrix<int,ScalarType> > Belos::RCGIter< ScalarType, MV, OP >::D_
private

Definition at line 394 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<Teuchos::SerialDenseMatrix<int,ScalarType> > Belos::RCGIter< ScalarType, MV, OP >::Delta_
private

Definition at line 397 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<Teuchos::SerialDenseMatrix<int,ScalarType> > Belos::RCGIter< ScalarType, MV, OP >::LUUTAU_
private

Definition at line 400 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<std::vector<int> > Belos::RCGIter< ScalarType, MV, OP >::ipiv_
private

Definition at line 403 of file BelosRCGIter.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<Teuchos::SerialDenseMatrix<int,ScalarType> > Belos::RCGIter< ScalarType, MV, OP >::rTz_old_
private

Definition at line 406 of file BelosRCGIter.hpp.


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