inline int applyInverse (const VectorEpetra& X, VectorEpetra& Y)
{
return ApplyInverse (X.epetraVector(), Y.epetraVector() );
}
std::pair<int, typename SolverNonLinearTrilinos<T>::real_type>
SolverNonLinearTrilinos<T>::solve ( sparse_matrix_ptrtype& jac_in, // System Jacobian Matrix
vector_ptrtype& x_in, // Solution vector
vector_ptrtype& r_in, // Residual vector
const double, // Stopping tolerance
const unsigned int )
{
//printf("Entering solve...\n");
MatrixEpetra* jac = dynamic_cast<MatrixEpetra *>( jac_in.get() );
VectorEpetra<T>* x = dynamic_cast<VectorEpetra<T>*>( x_in.get() );
// We cast to pointers so we can be sure that they succeeded
// by comparing the result against NULL.
// assert(jac != NULL); assert(jac->mat() != NULL);
// assert(x != NULL); assert(x->vec() != NULL);
// assert(r != NULL); assert(r->vec() != NULL);
// Create the top level parameter list
Teuchos::RCP<Teuchos::ParameterList> nlParamsPtr =
Teuchos::rcp( new Teuchos::ParameterList );
Teuchos::ParameterList& nlParams = *( nlParamsPtr.get() );
// Set the nonlinear solver method
nlParams.set( "Nonlinear Solver", "Line Search Based" );
// Set the printing parameters in the "Printing" sublist
Teuchos::ParameterList& printParams = nlParams.sublist( "Printing" );
printParams.set( "Output Precision", 10 );
printParams.set( "Output Processor", 0 );
printParams.set( "Output Information",
NOX::Utils::OuterIteration +
NOX::Utils::OuterIterationStatusTest +
NOX::Utils::InnerIteration +
NOX::Utils::Parameters +
NOX::Utils::Details +
NOX::Utils::Warning );
// start definition of nonlinear solver parameters
// Sublist for line search
Teuchos::ParameterList& searchParams = nlParams.sublist( "Line Search" );
searchParams.set( "Method", "Polynomial" );
// Sublist for direction
Teuchos::ParameterList& dirParams = nlParams.sublist( "Direction" );
dirParams.set( "Method", "Newton" );
Teuchos::ParameterList& newtonParams = dirParams.sublist( "Newton" );
newtonParams.set( "Forcing Term Method", "Constant" );
// Sublist for linear solver for the Newton method
Teuchos::ParameterList& lsParams = newtonParams.sublist( "Linear Solver" );
lsParams.set( "Aztec Solver", "GMRES" );
lsParams.set( "Max Iterations", 800 );
lsParams.set( "Tolerance", 1e-7 );
lsParams.set( "Output Frequency", 50 );
lsParams.set( "Aztec Preconditioner", "ilu" );
// -> A : Jacobian for the first iteration
// -> InitialGuess : first value x0
//printf("convert vectors...\n");
boost::shared_ptr<Epetra_Vector> InitialGuess = x->epetraVector();
// has_ownership=false in order to let the matrix jac be destroyed by boost
// and not by Teuchos::RCP
Teuchos::RCP<Epetra_CrsMatrix> A =
Teuchos::rcp( ( ( boost::shared_ptr<Epetra_CrsMatrix> )( jac->matrix() ) ).get(),false );
//std::cout << "A.has_ownership()=" << A.has_ownership() << std::endl;
Teuchos::RCP<NOX::Epetra::Interface::Required> iReq =
Teuchos::rcp( new SolverNonLinearTrilinosInterface( this ) );
Teuchos::RCP<NOX::Epetra::Interface::Jacobian> iJac =
Teuchos::rcp( new SolverNonLinearTrilinosInterface( this ) );
Teuchos::RCP<NOX::Epetra::LinearSystemAztecOO> linSys =
Teuchos::rcp( new NOX::Epetra::LinearSystemAztecOO( printParams,
lsParams,
iReq,
iJac,
A,
*InitialGuess ) );
// Need a NOX::Epetra::Vector for constructor
NOX::Epetra::Vector noxInitGuess( *InitialGuess, NOX::DeepCopy );
Teuchos::RCP<NOX::Epetra::Group> grpPtr =
Teuchos::rcp( new NOX::Epetra::Group( printParams,
iReq,
noxInitGuess,
linSys ) );
// Set up the status tests
Teuchos::RCP<NOX::StatusTest::NormF> testNormF =
Teuchos::rcp( new NOX::StatusTest::NormF( 1.0e-7 ) );
Teuchos::RCP<NOX::StatusTest::MaxIters> testMaxIters =
Teuchos::rcp( new NOX::StatusTest::MaxIters( 20 ) );
// this will be the convergence test to be used
Teuchos::RCP<NOX::StatusTest::Combo> combo =
Teuchos::rcp( new NOX::StatusTest::Combo( NOX::StatusTest::Combo::OR,
testNormF, testMaxIters ) );
// Create the solver
Teuchos::RCP<NOX::Solver::Generic> solver =
NOX::Solver::buildSolver( grpPtr, combo, nlParamsPtr );
// Solve the nonlinesar system
NOX::StatusTest::StatusType status = solver->solve();
if ( NOX::StatusTest::Converged != status )
std::cout << "\n" << "-- NOX solver did not converged --" << "\n";
else
std::cout << "\n" << "-- NOX solver converged --" << "\n";
// Print the answer
std::cout << "\n" << "-- Parameter List From Solver --" << "\n";
solver->getList().print( cout );
// Get the Epetra_Vector with the final solution from the solver
const NOX::Epetra::Group & finalGroup =
dynamic_cast<const NOX::Epetra::Group&>( solver->getSolutionGroup() );
const Epetra_Vector & finalSolution =
( dynamic_cast<const NOX::Epetra::Vector&>( finalGroup.getX() ) ).getEpetraVector();
//cout << "Computed solution : " << endl;
//cout << finalSolution;
x_in = boost::shared_ptr<VectorEpetra<T> > ( new VectorEpetra<T>( &finalSolution ) );
//std::cout << "InitialGuess.use_count()=" << InitialGuess.use_count() << std::endl;
//std::cout << "jac.use_count()=" << jac->matrix().use_count() << std::endl;
//std::cout << "x_in.use_count()=" << x_in.use_count() << std::endl;
return std::make_pair( 1,finalGroup.getNormF() );
}
/*!
\param In
X - A VectorEpetra to multiply with matrix.
\param Out
Y -A VectorEpetra containing result.
\return Integer error code, set to 0 if successful.
*/
inline int apply (const VectorEpetra& X, VectorEpetra& Y) const
{
return Apply (X.epetraVector(), Y.epetraVector() );
}