int main(int argc, char *argv[])
{
 
  // Initialize MPI
#ifdef HAVE_MPI
  MPI_Init(&argc,&argv);
#endif

  // Create a communicator for Epetra objects
#ifdef HAVE_MPI
  Epetra_MpiComm Comm( MPI_COMM_WORLD );
#else
  Epetra_SerialComm Comm;
#endif

  // Get the process ID and the total number of processors
  int MyPID = Comm.MyPID();
  int NumProc = Comm.NumProc();

  // Check verbosity level
  bool verbose = false;
  if (argc > 1)
    if (argv[1][0]=='-' && argv[1][1]=='v')
      verbose = true;

  // Get the number of elements from the command line
  int NumGlobalElements = 0;
  if ((argc > 2) && (verbose))
    NumGlobalElements = atoi(argv[2]) + 1;
  else if ((argc > 1) && (!verbose))
    NumGlobalElements = atoi(argv[1]) + 1;
  else 
    NumGlobalElements = 101;

  // The number of unknowns must be at least equal to the 
  // number of processors.
  if (NumGlobalElements < NumProc) {
    std::cout << "numGlobalBlocks = " << NumGlobalElements 
	 << " cannot be < number of processors = " << NumProc << std::endl;
    std::cout << "Test failed!" << std::endl;
    throw "NOX Error";
  }

  // Create the interface between NOX and the application
  // This object is derived from NOX::Epetra::Interface
  Teuchos::RCP<Interface> interface = 
    Teuchos::rcp(new Interface(NumGlobalElements, Comm));

  // Set the PDE factor (for nonlinear forcing term).  This could be specified
  // via user input.
  interface->setPDEfactor(100000.0);

  // Use a scaled vector space.  The scaling must also be registered
  // with the linear solver so the linear system is consistent!
  Teuchos::RCP<Epetra_Vector> scaleVec = 
    Teuchos::rcp(new Epetra_Vector( *(interface->getSolution())));
  scaleVec->PutScalar(2.0);
  Teuchos::RCP<NOX::Epetra::Scaling> scaling = 
    Teuchos::rcp(new NOX::Epetra::Scaling);
  scaling->addUserScaling(NOX::Epetra::Scaling::Left, scaleVec);

  // Use a weighted vector space for scaling all norms
  Teuchos::RCP<NOX::Epetra::VectorSpace> weightedVectorSpace = 
    Teuchos::rcp(new NOX::Epetra::VectorSpaceScaledL2(scaling));

  // Get the vector from the Problem
  Teuchos::RCP<Epetra_Vector> soln = interface->getSolution();
  Teuchos::RCP<NOX::Epetra::Vector> noxSoln = 
    Teuchos::rcp(new NOX::Epetra::Vector(soln, 
					 NOX::Epetra::Vector::CreateCopy,
					 NOX::DeepCopy,
					 weightedVectorSpace));

  // Initial Guess 
  noxSoln->init(2.0);

  // Begin Nonlinear Solver ************************************

  // 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", "Inexact Trust Region Based");
  nlParams.sublist("Trust Region").
    set("Inner Iteration Method", "Inexact Trust Region");

  // Set the printing parameters in the "Printing" sublist
  Teuchos::ParameterList& printParams = nlParams.sublist("Printing");
  
  // RPP: Commenting this line out.  There is now a default for MPI
  // specific builds.  We are testing that it works here.
  // //printParams.set("MyPID", MyPID);

  printParams.set("Output Precision", 3);
  printParams.set("Output Processor", 0);
  if (verbose)
    printParams.set("Output Information", 
			     NOX::Utils::OuterIteration + 
			     NOX::Utils::OuterIterationStatusTest + 
			     NOX::Utils::InnerIteration +
			     NOX::Utils::LinearSolverDetails +
			     NOX::Utils::Parameters + 
			     NOX::Utils::Details + 
			     NOX::Utils::Warning +
                             NOX::Utils::Debug +
			     NOX::Utils::TestDetails +
			     NOX::Utils::Error);
  else
    printParams.set("Output Information", NOX::Utils::Error +
			     NOX::Utils::TestDetails);

  // Create a print class for controlling output below
  NOX::Utils printing(printParams);

  // Sublist for direction
  Teuchos::ParameterList& dirParams = nlParams.sublist("Direction");
  dirParams.set("Method", "Newton");
  Teuchos::ParameterList& newtonParams = dirParams.sublist("Newton");
    newtonParams.set("Forcing Term Method", "Type 1");

  // 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-4);

  // Various Preconditioner options
  //lsParams.set("Preconditioner", "AztecOO");
  lsParams.set("Preconditioner", "Ifpack");
  lsParams.set("Preconditioner Reuse Policy", "Rebuild");

  // Sublist for Cauchy direction
  Teuchos::ParameterList& cauchyDirParams = nlParams.sublist("Cauchy Direction");
  cauchyDirParams.set("Method", "Steepest Descent");
  Teuchos::ParameterList& sdParams = cauchyDirParams.sublist("Steepest Descent");
  sdParams.set("Scaling Type", "Quadratic Model Min");

  // Add a user defined pre/post operator object
  Teuchos::RCP<NOX::Abstract::PrePostOperator> ppo =
    Teuchos::rcp(new UserPrePostOperator(printing));
  nlParams.sublist("Solver Options").set("User Defined Pre/Post Operator", 
					 ppo);

  // Let's force all status tests to do a full check
  nlParams.sublist("Solver Options").set("Status Test Check Type", "Complete");

  // User supplied (Epetra_RowMatrix)
  Teuchos::RCP<Epetra_RowMatrix> Analytic = interface->getJacobian();

  // Create the linear system
  Teuchos::RCP<NOX::Epetra::Interface::Required> iReq = interface;
  Teuchos::RCP<NOX::Epetra::Interface::Jacobian> iJac = interface;
  Teuchos::RCP<NOX::Epetra::LinearSystemAztecOO> linSys = 
    Teuchos::rcp(new NOX::Epetra::LinearSystemAztecOO(printParams, lsParams,
						      iReq,
						      iJac, Analytic, 
						      *noxSoln,
						      scaling));
  
  // Create the Group
  Teuchos::RCP<NOX::Epetra::Group> grpPtr = 
    Teuchos::rcp(new NOX::Epetra::Group(printParams, 
					iReq, 
					*noxSoln, 
					linSys));  
  NOX::Epetra::Group& grp = *grpPtr;

  // uncomment the following for loca supergroups
  //MF->setGroupForComputeF(*grpPtr);
  //FD->setGroupForComputeF(*grpPtr);

  // Create the convergence tests
  Teuchos::RCP<NOX::StatusTest::NormF> absresid = 
    Teuchos::rcp(new NOX::StatusTest::NormF(1.0e-8));
  Teuchos::RCP<NOX::StatusTest::NormF> relresid = 
    Teuchos::rcp(new NOX::StatusTest::NormF(grp, 1.0e-2));
  Teuchos::RCP<NOX::StatusTest::NormUpdate> update =
    Teuchos::rcp(new NOX::StatusTest::NormUpdate(1.0e-5));
  Teuchos::RCP<NOX::StatusTest::NormWRMS> wrms =
    Teuchos::rcp(new NOX::StatusTest::NormWRMS(1.0e-2, 1.0e-8));
  Teuchos::RCP<NOX::StatusTest::Combo> converged =
    Teuchos::rcp(new NOX::StatusTest::Combo(NOX::StatusTest::Combo::AND));
  converged->addStatusTest(absresid);
  converged->addStatusTest(relresid);
  converged->addStatusTest(wrms);
  converged->addStatusTest(update);
  Teuchos::RCP<NOX::StatusTest::MaxIters> maxiters = 
    Teuchos::rcp(new NOX::StatusTest::MaxIters(200));
  Teuchos::RCP<NOX::StatusTest::FiniteValue> fv =
    Teuchos::rcp(new NOX::StatusTest::FiniteValue);
  Teuchos::RCP<NOX::StatusTest::Combo> combo = 
    Teuchos::rcp(new NOX::StatusTest::Combo(NOX::StatusTest::Combo::OR));
  combo->addStatusTest(fv);
  combo->addStatusTest(converged);
  combo->addStatusTest(maxiters);

  // Create the solver
  Teuchos::RCP<NOX::Solver::Generic> solver = 
    NOX::Solver::buildSolver(grpPtr, combo, nlParamsPtr);
  NOX::StatusTest::StatusType solvStatus = solver->solve();

  // End Nonlinear Solver **************************************

  // 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();

  // Output the parameter list
  if (verbose) {
    if (printing.isPrintType(NOX::Utils::Parameters)) {
      printing.out() << std::endl << "Final Parameters" << std::endl
	   << "****************" << std::endl;
      solver->getList().print(printing.out());
      printing.out() << std::endl;
    }
  }

  // Print solution
  char file_name[25];
  FILE *ifp;
  int NumMyElements = soln->Map().NumMyElements();
  (void) sprintf(file_name, "output.%d",MyPID);
  ifp = fopen(file_name, "w");
  for (int i=0; i<NumMyElements; i++)
    fprintf(ifp, "%d  %E\n", soln->Map().MinMyGID()+i, finalSolution[i]);
  fclose(ifp);


  // Tests
  int status = 0; // Converged
  
  // 1. Convergence
  if (solvStatus != NOX::StatusTest::Converged) {
      status = 1;
      if (printing.isPrintType(NOX::Utils::Error))
	printing.out() << "Nonlinear solver failed to converge!" << std::endl;
  }
#ifndef HAVE_MPI 
  // 2. Linear solve iterations (14) - SERIAL TEST ONLY!
  //    The number of linear iterations changes with # of procs.
  if (const_cast<Teuchos::ParameterList&>(solver->getList()).sublist("Direction").sublist("Newton").sublist("Linear Solver").sublist("Output").get("Total Number of Linear Iterations",0) != 14) {
    status = 2;
  }
#endif
  // 3. Nonlinear solve iterations (17)
  if (const_cast<Teuchos::ParameterList&>(solver->getList()).sublist("Output").get("Nonlinear Iterations", 0) != 17)
    status = 3;
  // 4. Test the pre/post iterate options
  {
  UserPrePostOperator* ppoPtr = dynamic_cast<UserPrePostOperator*>(ppo.get());
  if (ppoPtr->getNumRunPreIterate() != 17)
    status = 4;
  if (ppoPtr->getNumRunPostIterate() != 17)
    status = 4;
  if (ppoPtr->getNumRunPreSolve() != 1)
    status = 4;
  if (ppoPtr->getNumRunPostSolve() != 1)
    status = 4;
  }
  // 5. Number of Cauchy steps (3)
  if (const_cast<Teuchos::ParameterList&>(solver->getList()).sublist("Trust Region").sublist("Output").get("Number of Cauchy Steps", 0) != 3)
    status = 5;
  // 6. Number of Newton steps (14)
  if (const_cast<Teuchos::ParameterList&>(solver->getList()).sublist("Trust Region").sublist("Output").get("Number of Newton Steps", 0) != 14)
    status = 6;

  // Summarize test results 
  if (status == 0)
    printing.out() << "Test passed!" << std::endl;
  else 
    printing.out() << "Test failed!" << std::endl;
  
#ifdef HAVE_MPI
  MPI_Finalize();
#endif

  // Final return value (0 = successfull, non-zero = failure)
  return status;
}
Exemplo n.º 2
0
int main(int argc, char *argv[])
{
 
  // Initialize MPI
#ifdef HAVE_MPI
  MPI_Init(&argc,&argv);
#endif

  // Create a communicator for Epetra objects
#ifdef HAVE_MPI
  Epetra_MpiComm Comm( MPI_COMM_WORLD );
#else
  Epetra_SerialComm Comm;
#endif

  // Get the process ID and the total number of processors
  int MyPID = Comm.MyPID();
  int NumProc = Comm.NumProc();

  // Check verbosity level
  bool verbose = false;
  if (argc > 1)
    if (argv[1][0]=='-' && argv[1][1]=='v')
      verbose = true;

  // Get the number of elements from the command line
  int NumGlobalElements = 0;
  if ((argc > 2) && (verbose))
    NumGlobalElements = atoi(argv[2]) + 1;
  else if ((argc > 1) && (!verbose))
    NumGlobalElements = atoi(argv[1]) + 1;
  else 
    NumGlobalElements = 101;

  // The number of unknowns must be at least equal to the 
  // number of processors.
  if (NumGlobalElements < NumProc) {
    cout << "numGlobalBlocks = " << NumGlobalElements 
	 << " cannot be < number of processors = " << NumProc << endl;
    cout << "Test failed!" << endl;
    throw "NOX Error";
  }

  // Create the interface between NOX and the application
  // This object is derived from NOX::Epetra::Interface
  Teuchos::RCP<ModelEvaluatorInterface> interface = 
    Teuchos::rcp(new ModelEvaluatorInterface(NumGlobalElements, Comm));

  // Get the vector from the Problem
  Teuchos::RCP<Epetra_Vector> soln = 
    Teuchos::rcp_const_cast<Epetra_Vector>(interface->get_x_init());
  Teuchos::RCP<NOX::Epetra::Vector> noxSoln = 
    Teuchos::rcp(new NOX::Epetra::Vector(soln, 
					 NOX::Epetra::Vector::CreateView));

  // Set the PDE factor (for nonlinear forcing term).  This could be specified
  // via user input.
  interface->setPDEfactor(1000.0);

  // Begin Nonlinear Solver ************************************

  // 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("MyPID", MyPID); 
  printParams.set("Output Precision", 3);
  printParams.set("Output Processor", 0);
  if (verbose)
    printParams.set("Output Information", 
			     NOX::Utils::OuterIteration + 
			     NOX::Utils::OuterIterationStatusTest + 
			     NOX::Utils::InnerIteration +
			     NOX::Utils::LinearSolverDetails +
		    //NOX::Utils::Parameters + 
			     NOX::Utils::Details + 
			     NOX::Utils::Warning +
                             NOX::Utils::Debug +
			     NOX::Utils::TestDetails +
			     NOX::Utils::Error);
  else
    printParams.set("Output Information", NOX::Utils::Error +
			     NOX::Utils::TestDetails);

  // Create a print class for controlling output below
  NOX::Utils printing(printParams);

  // Sublist for line search 
  Teuchos::ParameterList& searchParams = nlParams.sublist("Line Search");
  searchParams.set("Method", "Full Step");

  // 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-4);

  // Various Preconditioner options
  //lsParams.set("Preconditioner", "AztecOO");
  lsParams.set("Preconditioner", "Ifpack");
  lsParams.set("Preconditioner Reuse Policy", "Reuse");
  lsParams.set("Max Age Of Prec", 5);

  // Add a user defined pre/post operator object
  Teuchos::RCP<NOX::Abstract::PrePostOperator> ppo =
    Teuchos::rcp(new UserPrePostOperator(printing));
  nlParams.sublist("Solver Options").set("User Defined Pre/Post Operator", 
					 ppo);

  // Let's force all status tests to do a full check
  nlParams.sublist("Solver Options").set("Status Test Check Type", "Complete");

  // Wrap the model evaluator in a nox epetra interface object
  Teuchos::RCP<NOX::Epetra::ModelEvaluatorInterface> nox_interface = 
    Teuchos::rcp(new NOX::Epetra::ModelEvaluatorInterface(interface));

  // Create all possible Epetra_Operators.
  // 1. User supplied (Epetra_RowMatrix)
  Teuchos::RCP<Epetra_RowMatrix> Analytic = 
    Teuchos::rcp_dynamic_cast<Epetra_RowMatrix>(interface->create_W());
  // 2. Matrix-Free (Epetra_Operator)
  Teuchos::RCP<NOX::Epetra::MatrixFree> MF = 
    Teuchos::rcp(new NOX::Epetra::MatrixFree(printParams, nox_interface, 
					     *noxSoln));
  // 3. Finite Difference (Epetra_RowMatrix)
  Teuchos::RCP<NOX::Epetra::FiniteDifference> FD = 
    Teuchos::rcp(new NOX::Epetra::FiniteDifference(printParams, nox_interface, 
						   *soln));

  // Create the linear system
  Teuchos::RCP<NOX::Epetra::Interface::Required> iReq = nox_interface;
  Teuchos::RCP<NOX::Epetra::Interface::Jacobian> iJac = MF;
  Teuchos::RCP<NOX::Epetra::Interface::Preconditioner> iPrec = FD;
  Teuchos::RCP<NOX::Epetra::LinearSystemAztecOO> linSys = 
    Teuchos::rcp(new NOX::Epetra::LinearSystemAztecOO(printParams, lsParams,
						      //interface, 
						      iJac, MF, 
						      iPrec, FD, 
						      *soln));
  
  // Create the Group
  NOX::Epetra::Vector initialGuess(soln, NOX::Epetra::Vector::CreateView);
  Teuchos::RCP<NOX::Epetra::Group> grpPtr = 
    Teuchos::rcp(new NOX::Epetra::Group(printParams, 
					iReq, 
					initialGuess, 
					linSys));  
  NOX::Epetra::Group& grp = *grpPtr;

  // uncomment the following for loca supergroups
  //MF->setGroupForComputeF(*grpPtr);
  //FD->setGroupForComputeF(*grpPtr);

  // Create the convergence tests
  Teuchos::RCP<NOX::StatusTest::NormF> absresid = 
    Teuchos::rcp(new NOX::StatusTest::NormF(1.0e-8));
  Teuchos::RCP<NOX::StatusTest::NormF> relresid = 
    Teuchos::rcp(new NOX::StatusTest::NormF(grp, 1.0e-2));
  Teuchos::RCP<NOX::StatusTest::NormUpdate> update =
    Teuchos::rcp(new NOX::StatusTest::NormUpdate(1.0e-5));
  Teuchos::RCP<NOX::StatusTest::NormWRMS> wrms =
    Teuchos::rcp(new NOX::StatusTest::NormWRMS(1.0e-2, 1.0e-8));
  Teuchos::RCP<NOX::StatusTest::Combo> converged =
    Teuchos::rcp(new NOX::StatusTest::Combo(NOX::StatusTest::Combo::AND));
  converged->addStatusTest(absresid);
  converged->addStatusTest(relresid);
  converged->addStatusTest(wrms);
  converged->addStatusTest(update);
  Teuchos::RCP<NOX::StatusTest::MaxIters> maxiters = 
    Teuchos::rcp(new NOX::StatusTest::MaxIters(20));
  Teuchos::RCP<NOX::StatusTest::FiniteValue> fv =
    Teuchos::rcp(new NOX::StatusTest::FiniteValue);
  Teuchos::RCP<NOX::StatusTest::Combo> combo = 
    Teuchos::rcp(new NOX::StatusTest::Combo(NOX::StatusTest::Combo::OR));
  combo->addStatusTest(fv);
  combo->addStatusTest(converged);
  combo->addStatusTest(maxiters);

  // Create the solver
  Teuchos::RCP<NOX::Solver::Generic> solver = 
    NOX::Solver::buildSolver(grpPtr, combo, nlParamsPtr);
  NOX::StatusTest::StatusType solvStatus = solver->solve();

  // End Nonlinear Solver **************************************

  // 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();

  // Output the parameter list
//   if (verbose) {
//     if (printing.isPrintType(NOX::Utils::Parameters)) {
//       printing.out() << endl << "Final Parameters" << endl
// 	   << "****************" << endl;
//       solver->getList().print(printing.out());
//       printing.out() << endl;
//     }
//   }

  // Print solution
  char file_name[25];
  FILE *ifp;
  int NumMyElements = soln->Map().NumMyElements();
  (void) sprintf(file_name, "output.%d",MyPID);
  ifp = fopen(file_name, "w");
  for (int i=0; i<NumMyElements; i++)
    fprintf(ifp, "%d  %E\n", soln->Map().MinMyGID()+i, finalSolution[i]);
  fclose(ifp);


  // Tests
  int status = 0; // Converged
  
  // 1. Convergence
  if (solvStatus != NOX::StatusTest::Converged) {
      status = 1;
      if (printing.isPrintType(NOX::Utils::Error))
	printing.out() << "Nonlinear solver failed to converge!" << endl;
  }
#ifndef HAVE_MPI 
  // 2. Linear solve iterations (53) - SERIAL TEST ONLY!
  //    The number of linear iterations changes with # of procs.
  if (const_cast<Teuchos::ParameterList&>(solver->getList()).sublist("Direction").sublist("Newton").sublist("Linear Solver").sublist("Output").get("Total Number of Linear Iterations",0) != 53) {
    status = 2;
  }
#endif
  // 3. Nonlinear solve iterations (10)
  if (const_cast<Teuchos::ParameterList&>(solver->getList()).sublist("Output").get("Nonlinear Iterations", 0) != 10)
    status = 3;
  // 4. Test the pre/post iterate options
  {
  UserPrePostOperator* ppoPtr = dynamic_cast<UserPrePostOperator*>(ppo.get());
  if (ppoPtr->getNumRunPreIterate() != 10)
    status = 4;
  if (ppoPtr->getNumRunPostIterate() != 10)
    status = 4;
  if (ppoPtr->getNumRunPreSolve() != 1)
    status = 4;
  if (ppoPtr->getNumRunPostSolve() != 1)
    status = 4;
  }
  // Summarize test results 
  if (status == 0)
    printing.out() << "Test passed!" << endl;
  else 
    printing.out() << "Test failed!" << endl;
  
#ifdef HAVE_MPI
  MPI_Finalize();
#endif

  // Final return value (0 = successfull, non-zero = failure)
  return status;
}