test/TestAll_LL/cxx_main.cpp

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//       Ifpack: Object-Oriented Algebraic Preconditioner Package
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#include "Ifpack_ConfigDefs.h"

#ifdef HAVE_MPI
#include "Epetra_MpiComm.h"
#else
#include "Epetra_SerialComm.h"
#endif
#include "Epetra_CrsMatrix.h"
#include "Epetra_Vector.h"
#include "Epetra_LinearProblem.h"
#include "Galeri_Maps.h"
#include "Galeri_CrsMatrices.h"
#include "Teuchos_ParameterList.hpp"
#include "Teuchos_RefCountPtr.hpp"
#include "Ifpack_AdditiveSchwarz.h"
#include "AztecOO.h"
#include "Ifpack_PointRelaxation.h"
#include "Ifpack_BlockRelaxation.h"
#include "Ifpack_DenseContainer.h"
#include "Ifpack_SparseContainer.h"
#include "Ifpack_Amesos.h"
#include "Ifpack_Utils.h"
#include "Ifpack_Chebyshev.h"
#include "Ifpack_Polynomial.h"
#include "Ifpack_Krylov.h"

template <class T>
bool Test(const Teuchos::RefCountPtr<Epetra_RowMatrix>& Matrix, Teuchos::ParameterList& List)
{
  using std::cout;
  using std::endl;

  int NumVectors = 1;
  bool UseTranspose = false;

  Epetra_MultiVector LHS(Matrix->OperatorDomainMap(),NumVectors);
  Epetra_MultiVector RHS(Matrix->OperatorRangeMap(),NumVectors);
  Epetra_MultiVector LHSexact(Matrix->OperatorDomainMap(),NumVectors);

  LHS.PutScalar(0.0);
  LHSexact.Random();
  Matrix->Multiply(UseTranspose,LHSexact,RHS);

  Epetra_LinearProblem Problem(&*Matrix,&LHS,&RHS);

  Teuchos::RefCountPtr<T> Prec;

  Prec = Teuchos::rcp( new T(&*Matrix) );
  assert(Prec != Teuchos::null);

  IFPACK_CHK_ERR(Prec->SetParameters(List));
  IFPACK_CHK_ERR(Prec->Initialize());
  IFPACK_CHK_ERR(Prec->Compute());

  // create the AztecOO solver
  AztecOO AztecOOSolver(Problem);

  // specify solver
  AztecOOSolver.SetAztecOption(AZ_solver,AZ_gmres);
  AztecOOSolver.SetAztecOption(AZ_output,32);

  AztecOOSolver.SetPrecOperator(&*Prec);

  // solver. The solver should converge in one iteration,
  // or maximum two (numerical errors)
  AztecOOSolver.Iterate(1550,1e-8);

  cout << *Prec;

  std::vector<double> Norm(NumVectors);
  LHS.Update(1.0,LHSexact,-1.0);
  LHS.Norm2(&Norm[0]);
  for (int i = 0 ; i < NumVectors ; ++i) {
    cout << "Norm[" << i << "] = " << Norm[i] << endl;
    if (Norm[i] > 1e-3)
      return(false);
  }
  return(true);

}

int main(int argc, char *argv[])
{

#ifdef HAVE_MPI
  MPI_Init(&argc,&argv);
  Epetra_MpiComm Comm(MPI_COMM_WORLD);
#else
  Epetra_SerialComm Comm;
#endif

  bool verbose = (Comm.MyPID() == 0);

  Teuchos::ParameterList GaleriList;
  const int nx = 30;
  GaleriList.set("n", nx * nx);
  GaleriList.set("nx", nx);
  GaleriList.set("ny", nx);
  Teuchos::RefCountPtr<Epetra_Map> Map = Teuchos::rcp( Galeri::CreateMap64("Linear", Comm, GaleriList) );
  Teuchos::RefCountPtr<Epetra_RowMatrix> Matrix = Teuchos::rcp( Galeri::CreateCrsMatrix("Laplace2D", &*Map, GaleriList) );

  Teuchos::ParameterList List, DefaultList;

  // test the preconditioner
  int TestPassed = true;

  if (!Test<Ifpack_Chebyshev>(Matrix,List))
  {
    TestPassed = false;
  }

  List.set("polynomial: degree",3);
  if (!Test<Ifpack_Polynomial>(Matrix,List))
  {
    TestPassed = false;
  }

  List = DefaultList;
  List.set("krylov: tolerance", 1e-14);
  List.set("krylov: iterations", 100);
  List.set("krylov: preconditioner", 2);
  List.set("krylov: block size", 9);
  List.set("krylov: number of sweeps", 2);
  if (!Test<Ifpack_Krylov>(Matrix,List))
  {
    TestPassed = false;
  }

  if (!Test< Ifpack_AdditiveSchwarz<Ifpack_Krylov> >(Matrix,List)) {
    TestPassed = false;
  }

  if (!Test<Ifpack_Amesos>(Matrix,List))
  {
    TestPassed = false;
  }

  // FIXME
#if 0
  if (!Test<Ifpack_AdditiveSchwarz<Ifpack_BlockRelaxation<Ifpack_DenseContainer> > >(Matrix,List)) {
    TestPassed = false;
  }
#endif

  // this is ok as long as just one sweep is applied
  List = DefaultList;
  List.set("relaxation: type", "Gauss-Seidel");
  if (!Test<Ifpack_PointRelaxation>(Matrix,List)) {
    TestPassed = false;
  }

  // this is ok as long as just one sweep is applied
  List = DefaultList;
  List.set("relaxation: type", "symmetric Gauss-Seidel");
  List.set("relaxation: sweeps", 5);
  List.set("partitioner: local parts", 128);
  List.set("partitioner: type", "linear");
  if (!Test<Ifpack_BlockRelaxation<Ifpack_DenseContainer> >(Matrix,List)) {
    TestPassed = false;
  }

  // this is ok as long as just one sweep is applied
  List = DefaultList;
  List.set("relaxation: type", "symmetric Gauss-Seidel");
  List.set("partitioner: local parts", 128);
  List.set("partitioner: type", "linear");
  if (!Test<Ifpack_BlockRelaxation<Ifpack_SparseContainer<Ifpack_Amesos> > >(Matrix,List)) {
    TestPassed = false;
  }

  // this is ok as long as just one sweep is applied
  List = DefaultList;
  List.set("relaxation: type", "symmetric Gauss-Seidel");
  List.set("partitioner: local parts", 128);
  List.set("partitioner: type", "linear");
  if (!Test<Ifpack_AdditiveSchwarz<Ifpack_BlockRelaxation<Ifpack_SparseContainer<Ifpack_Amesos> > > >(Matrix,List)) {
    TestPassed = false;
  }
  if (!TestPassed) {
    cerr << "Test `TestAll.exe' FAILED!" << endl;
    exit(EXIT_FAILURE);
  }

#ifdef HAVE_MPI
  MPI_Finalize();
#endif
  if (verbose)
    cout << "Test `TestAll.exe' passed!" << endl;

  return(EXIT_SUCCESS);
}