46 #include "Ifpack_ConfigDefs.h"
47 #include "Ifpack_CondestType.h"
49 #include "Ifpack_Preconditioner.h"
50 #include "Epetra_Vector.h"
51 #include "Epetra_CrsMatrix.h"
52 #include "Epetra_Time.h"
53 #include "Teuchos_RefCountPtr.hpp"
115 return(IsInitialized_);
148 double Condest(
const Ifpack_CondestType CT = Ifpack_Cheap,
149 const int MaxIters = 1550,
150 const double Tol = 1e-9,
168 int SetUseTranspose(
bool UseTranspose_in) {UseTranspose_ = UseTranspose_in;
return(0);};
203 return(Label_.c_str());
214 virtual std::ostream&
Print(std::ostream& os)
const;
219 return(NumInitialize_);
231 return(NumApplyInverse_);
237 return(InitializeTime_);
243 return(ComputeTime_);
249 return(ApplyInverseTime_);
260 return(ComputeFlops_);
265 return(ApplyInverseFlops_);
268 inline double LevelOfFill()
const {
269 return(LevelOfFill_);
292 return(DropTolerance_);
296 #ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
302 long long NumGlobalNonzeros64()
const {
304 return(
L().NumGlobalNonzeros64() +
U().NumGlobalNonzeros64() -
L().NumGlobalRows64());
330 template<
typename int_type>
344 Teuchos::RefCountPtr<Epetra_CrsMatrix> L_;
346 Teuchos::RefCountPtr<Epetra_CrsMatrix> U_;
358 double DropTolerance_;
374 mutable int NumApplyInverse_;
376 double InitializeTime_;
380 mutable double ApplyInverseTime_;
382 double ComputeFlops_;
384 mutable double ApplyInverseFlops_;
388 long long GlobalNonzeros_;
389 Teuchos::RefCountPtr<Epetra_SerialComm> SerialComm_;
390 Teuchos::RefCountPtr<Epetra_Map> SerialMap_;
double NormInf() const
Returns 0.0 because this class cannot compute Inf-norm.
virtual std::ostream & Print(std::ostream &os) const
Prints basic information on iostream. This function is used by operator<<.
const Epetra_Map & OperatorRangeMap() const
Returns the Epetra_Map object associated with the range of this operator.
const Epetra_RowMatrix & Matrix() const
Returns a reference to the matrix to be preconditioned.
double Condest() const
Returns the computed estimated condition number, or -1.0 if no computed.
bool IsComputed() const
If factor is completed, this query returns true, otherwise it returns false.
virtual int NumApplyInverse() const
Returns the number of calls to ApplyInverse().
Ifpack_ILUT(const Epetra_RowMatrix *A)
Ifpack_ILUT constuctor with variable number of indices per row.
virtual const Epetra_Map & OperatorDomainMap() const =0
int SetParameters(Teuchos::ParameterList ¶meterlis)
Set parameters using a Teuchos::ParameterList object.
const Epetra_Map & OperatorDomainMap() const
Returns the Epetra_Map object associated with the domain of this operator.
virtual int NumInitialize() const
Returns the number of calls to Initialize().
const Epetra_CrsMatrix & U() const
Returns a reference to the U factor.
int Initialize()
Initialize L and U with values from user matrix A.
const Epetra_CrsMatrix & L() const
Returns a reference to the L factor.
virtual ~Ifpack_ILUT()
Ifpack_ILUT Destructor.
int NumMyNonzeros() const
Returns the number of nonzero entries in the local graph.
virtual const Epetra_Map & OperatorRangeMap() const =0
bool HasNormInf() const
Returns false because this class cannot compute an Inf-norm.
double RelativeThreshold() const
Get relative threshold value.
const Epetra_Comm & Comm() const
Returns the Epetra_BlockMap object associated with the range of this matrix operator.
Ifpack_ScalingType enumerable type.
virtual int NumCompute() const
Returns the number of calls to Compute().
Ifpack_Preconditioner: basic class for preconditioning in Ifpack.
int Compute()
Compute IC factor U using the specified graph, diagonal perturbation thresholds and relaxation parame...
bool UseTranspose() const
Returns the current UseTranspose setting.
virtual double ComputeFlops() const
Returns the number of flops in the computation phase.
virtual double ApplyInverseTime() const
Returns the time spent in ApplyInverse().
int SetUseTranspose(bool UseTranspose_in)
If set true, transpose of this operator will be applied.
bool IsInitialized() const
Returns true if the preconditioner has been successfully initialized.
virtual double ApplyInverseFlops() const
Returns the number of flops in the application of the preconditioner.
int ApplyInverse(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
Returns the result of a Ifpack_ILUT forward/back solve on a Epetra_MultiVector X in Y...
virtual double InitializeFlops() const
Returns the number of flops in the initialization phase.
double DropTolerance() const
Gets the dropping tolerance.
virtual double ComputeTime() const
Returns the time spent in Compute().
double AbsoluteThreshold() const
Get absolute threshold value.
int NumGlobalNonzeros() const
Returns the number of nonzero entries in the global graph.
const char * Label() const
Returns the label of this object.
Ifpack_ILUT: A class for constructing and using an incomplete LU factorization of a given Epetra_RowM...
virtual double InitializeTime() const
Returns the time spent in Initialize().
int SetLabel(const char *Label_in)
Sets the label for this object.
double RelaxValue() const
Set relative threshold value.