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This class implements the preconditioned Conjugate Gradient (CG) iteration. More...
#include <BelosCGIter.hpp>
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 CG. 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_ |
| const Teuchos::RCP < StatusTestGenResNorm < ScalarType, MV, OP > > | convTest_ |
| bool | initialized_ |
| bool | stateStorageInitialized_ |
| int | iter_ |
| bool | foldConvergenceDetectionIntoAllreduce_ |
| ScalarType | rHr_ |
| bool | assertPositiveDefiniteness_ |
| Teuchos::ArrayRCP< MagnitudeType > | diag_ |
| Teuchos::ArrayRCP< MagnitudeType > | offdiag_ |
| int | numEntriesForCondEst_ |
| bool | doCondEst_ |
| Teuchos::RCP< MV > | R_ |
| Teuchos::RCP< MV > | Z_ |
| Teuchos::RCP< MV > | P_ |
| Teuchos::RCP< MV > | AP_ |
| Teuchos::RCP< MV > | S_ |
Constructors/Destructor | |
| CGIter (const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &problem, const Teuchos::RCP< OutputManager< ScalarType > > &printer, const Teuchos::RCP< StatusTest< ScalarType, MV, OP > > &tester, const Teuchos::RCP< StatusTestGenResNorm< ScalarType, MV, OP > > &convTester, Teuchos::ParameterList ¶ms) | |
| CGIter constructor with linear problem, solver utilities, and parameter list of solver options. More... | |
| virtual | ~CGIter () |
| Destructor. More... | |
Solver methods | |
| void | iterate () |
| This method performs CG iterations until the status test indicates the need to stop or an error occurs (in which case, an std::exception is thrown). More... | |
| void | initializeCG (CGIterationState< 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... | |
| CGIterationState< 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 > *norms) 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... | |
| void | setDoCondEst (bool val) |
| Sets whether or not to store the diagonal for condition estimation. More... | |
| Teuchos::ArrayView< MagnitudeType > | getDiag () |
| Gets the diagonal for condition estimation. More... | |
| Teuchos::ArrayView< MagnitudeType > | getOffDiag () |
| Gets the off-diagonal for condition estimation. More... | |
Additional Inherited Members | |
 Public Member Functions inherited from Belos::CGIteration< ScalarType, MV, OP > | |
| Public Member Functions inherited from Belos::Iteration< ScalarType, MV, OP > | |
| Iteration () | |
| Default Constructor. More... | |
| virtual | ~Iteration () |
| Destructor. More... | |
| virtual Teuchos::RCP< const MV > | getNativeResiduals (std::vector< typename Teuchos::ScalarTraits< ScalarType >::magnitudeType > *norms) const =0 |
| Get the residuals native to the solver. More... | |
This class implements the preconditioned Conjugate Gradient (CG) iteration.
Definition at line 79 of file BelosCGIter.hpp.
| typedef MultiVecTraits<ScalarType,MV> Belos::CGIter< ScalarType, MV, OP >::MVT |
Definition at line 86 of file BelosCGIter.hpp.
| typedef OperatorTraits<ScalarType,MV,OP> Belos::CGIter< ScalarType, MV, OP >::OPT |
Definition at line 87 of file BelosCGIter.hpp.
| typedef Teuchos::ScalarTraits<ScalarType> Belos::CGIter< ScalarType, MV, OP >::SCT |
Definition at line 88 of file BelosCGIter.hpp.
| typedef SCT::magnitudeType Belos::CGIter< ScalarType, MV, OP >::MagnitudeType |
Definition at line 89 of file BelosCGIter.hpp.
| Belos::CGIter< ScalarType, MV, OP >::CGIter | ( | const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > & | problem, |
| const Teuchos::RCP< OutputManager< ScalarType > > & | printer, | ||
| const Teuchos::RCP< StatusTest< ScalarType, MV, OP > > & | tester, | ||
| const Teuchos::RCP< StatusTestGenResNorm< ScalarType, MV, OP > > & | convTester, | ||
| Teuchos::ParameterList & | params | ||
| ) |
CGIter 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 320 of file BelosCGIter.hpp.
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Destructor.
Definition at line 106 of file BelosCGIter.hpp.
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This method performs CG 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 CG 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 447 of file BelosCGIter.hpp.
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Initialize the solver to an iterate, providing a complete state.
The CGIter 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.
true (see post-conditions of isInitialize())newstate which directly points to the multivectors in the solver, the data is not copied. Implements Belos::CGIteration< ScalarType, MV, OP >.
Definition at line 389 of file BelosCGIter.hpp.
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Initialize the solver with the initial vectors from the linear problem or random data.
Implements Belos::Iteration< ScalarType, MV, OP >.
Definition at line 146 of file BelosCGIter.hpp.
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Get the current state of the linear solver.
The data is only valid if isInitialized() == true.
Implements Belos::CGIteration< ScalarType, MV, OP >.
Definition at line 158 of file BelosCGIter.hpp.
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Get the current iteration count.
Implements Belos::Iteration< ScalarType, MV, OP >.
Definition at line 174 of file BelosCGIter.hpp.
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Reset the iteration count.
Implements Belos::Iteration< ScalarType, MV, OP >.
Definition at line 177 of file BelosCGIter.hpp.
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Get the norms of the residuals native to the solver.
Definition at line 181 of file BelosCGIter.hpp.
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Get the current update to the linear system.
Implements Belos::Iteration< ScalarType, MV, OP >.
Definition at line 192 of file BelosCGIter.hpp.
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Get a constant reference to the linear problem.
Implements Belos::Iteration< ScalarType, MV, OP >.
Definition at line 200 of file BelosCGIter.hpp.
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Get the blocksize to be used by the iterative solver in solving this linear problem.
Implements Belos::Iteration< ScalarType, MV, OP >.
Definition at line 203 of file BelosCGIter.hpp.
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Set the blocksize to be used by the iterative solver in solving this linear problem.
Implements Belos::Iteration< ScalarType, MV, OP >.
Definition at line 206 of file BelosCGIter.hpp.
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States whether the solver has been initialized or not.
Implements Belos::Iteration< ScalarType, MV, OP >.
Definition at line 212 of file BelosCGIter.hpp.
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Sets whether or not to store the diagonal for condition estimation.
Implements Belos::CGIteration< ScalarType, MV, OP >.
Definition at line 216 of file BelosCGIter.hpp.
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Gets the diagonal for condition estimation.
Implements Belos::CGIteration< ScalarType, MV, OP >.
Definition at line 221 of file BelosCGIter.hpp.
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Gets the off-diagonal for condition estimation.
Implements Belos::CGIteration< ScalarType, MV, OP >.
Definition at line 234 of file BelosCGIter.hpp.
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Method for initalizing the state storage needed by CG.
Definition at line 342 of file BelosCGIter.hpp.
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Definition at line 261 of file BelosCGIter.hpp.
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Definition at line 262 of file BelosCGIter.hpp.
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Definition at line 263 of file BelosCGIter.hpp.
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Definition at line 264 of file BelosCGIter.hpp.
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Definition at line 272 of file BelosCGIter.hpp.
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Definition at line 277 of file BelosCGIter.hpp.
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Definition at line 280 of file BelosCGIter.hpp.
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Definition at line 283 of file BelosCGIter.hpp.
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Definition at line 286 of file BelosCGIter.hpp.
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Definition at line 289 of file BelosCGIter.hpp.
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Definition at line 292 of file BelosCGIter.hpp.
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Definition at line 292 of file BelosCGIter.hpp.
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Definition at line 293 of file BelosCGIter.hpp.
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Definition at line 294 of file BelosCGIter.hpp.
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Definition at line 302 of file BelosCGIter.hpp.
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Definition at line 305 of file BelosCGIter.hpp.
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Definition at line 308 of file BelosCGIter.hpp.
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Definition at line 311 of file BelosCGIter.hpp.
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Definition at line 313 of file BelosCGIter.hpp.
1.8.5