C++ RCP::Factor方法代码示例

int main(int argc, char *argv[]) {
  //
  int MyPID = 0;
#ifdef EPETRA_MPI
  // Initialize MPI
  MPI_Init(&argc,&argv);
  Epetra_MpiComm Comm(MPI_COMM_WORLD);
  MyPID = Comm.MyPID();
#else
  Epetra_SerialComm Comm;
#endif
  //
  typedef double                            ST;
  typedef Teuchos::ScalarTraits<ST>        SCT;
  typedef SCT::magnitudeType                MT;
  typedef Epetra_MultiVector                MV;
  typedef Epetra_Operator                   OP;
  typedef Belos::MultiVecTraits<ST,MV>     MVT;
  typedef Belos::OperatorTraits<ST,MV,OP>  OPT;

  using Teuchos::ParameterList;
  using Teuchos::RCP;
  using Teuchos::rcp;

bool verbose = false;
bool success = true;
try {
bool proc_verbose = false;
  bool debug = false;
  bool leftprec = true;      // left preconditioning or right.
  int frequency = -1;        // frequency of status test output.
  int numrhs = 1;            // number of right-hand sides to solve for
  int maxiters = -1;         // maximum number of iterations allowed per linear system
  int maxsubspace = 250;     // maximum number of blocks the solver can use for the subspace
  int recycle = 50;          // maximum size of recycle space
  int maxrestarts = 15;      // maximum number of restarts allowed
  std::string filename("sherman5.hb");
  std::string ortho("IMGS");
  MT tol = 1.0e-10;          // relative residual tolerance

  Teuchos::CommandLineProcessor cmdp(false,true);
  cmdp.setOption("verbose","quiet",&verbose,"Print messages and results.");
  cmdp.setOption("debug","nondebug",&debug, "Print debugging information from solver.");
  cmdp.setOption("left-prec","right-prec",&leftprec,"Left preconditioning or right.");
  cmdp.setOption("frequency",&frequency,"Solvers frequency for printing residuals (#iters).");
  cmdp.setOption("filename",&filename,"Filename for test matrix.  Acceptable file extensions: *.hb,*.mtx,*.triU,*.triS");
  cmdp.setOption("tol",&tol,"Relative residual tolerance used by GMRES solver.");
  cmdp.setOption("num-rhs",&numrhs,"Number of right-hand sides to be solved for.");
  cmdp.setOption("max-iters",&maxiters,"Maximum number of iterations per linear system (-1 = adapted to problem/block size).");
  cmdp.setOption("max-subspace",&maxsubspace,"Maximum number of blocks the solver can use for the subspace.");
  cmdp.setOption("recycle",&recycle,"Number of vectors in recycle space.");
  cmdp.setOption("max-cycles",&maxrestarts,"Maximum number of cycles allowed for GCRO-DR solver.");
  cmdp.setOption("ortho-type",&ortho,"Orthogonalization type. Must be one of DGKS, ICGS, IMGS.");
  if (cmdp.parse(argc,argv) != Teuchos::CommandLineProcessor::PARSE_SUCCESSFUL) {
    return -1;
  }
  if (!verbose)
    frequency = -1;  // reset frequency if test is not verbose

  //
  // *************Get the problem*********************
  //
  RCP<Epetra_CrsMatrix> A;
  RCP<Epetra_MultiVector> B, X;
  int return_val =Belos::Util::createEpetraProblem(filename,NULL,&A,NULL,NULL,&MyPID);
  const Epetra_Map &Map = A->RowMap();
  if(return_val != 0) return return_val;
  proc_verbose = verbose && (MyPID==0); /* Only print on zero processor */
  X = rcp( new Epetra_MultiVector( Map, numrhs ) );
  B = rcp( new Epetra_MultiVector( Map, numrhs ) );
  X->Random();
  OPT::Apply( *A, *X, *B );
  X->PutScalar( 0.0 );
  //
  // ************Construct preconditioner*************
  //
  if (proc_verbose) std::cout << std::endl << std::endl;
  if (proc_verbose) std::cout << "Constructing ILU preconditioner" << std::endl;
  int Lfill = 2;
  if (proc_verbose) std::cout << "Using Lfill = " << Lfill << std::endl;
  int Overlap = 2;
  if (proc_verbose) std::cout << "Using Level Overlap = " << Overlap << std::endl;
  double Athresh = 0.0;
  if (proc_verbose) std::cout << "Using Absolute Threshold Value of " << Athresh << std::endl;
  double Rthresh = 1.0;
  if (proc_verbose) std::cout << "Using Relative Threshold Value of " << Rthresh << std::endl;
  //
  Teuchos::RCP<Ifpack_IlukGraph> ilukGraph;
  Teuchos::RCP<Ifpack_CrsRiluk> ilukFactors;
  //
  ilukGraph = Teuchos::rcp(new Ifpack_IlukGraph(A->Graph(), Lfill, Overlap));
  int info = ilukGraph->ConstructFilledGraph();
  assert( info == 0 );
  ilukFactors = Teuchos::rcp(new Ifpack_CrsRiluk(*ilukGraph));
  int initerr = ilukFactors->InitValues(*A);
  if (initerr != 0) std::cout << "InitValues error = " << initerr;
  info = ilukFactors->Factor();
  assert( info == 0 );
  bool transA = false;
  double Cond_Est;
//.........这里部分代码省略.........

int main(int argc, char *argv[]) {
  //
  Teuchos::GlobalMPISession session(&argc, &argv, NULL);
  //
  typedef double                            ST;
  typedef Teuchos::ScalarTraits<ST>        SCT;
  typedef SCT::magnitudeType                MT;
  typedef Epetra_MultiVector                MV;
  typedef Epetra_Operator                   OP;
  typedef Belos::MultiVecTraits<ST,MV>     MVT;
  typedef Belos::OperatorTraits<ST,MV,OP>  OPT;

  using Teuchos::ParameterList;
  using Teuchos::RCP;
  using Teuchos::rcp;

  bool verbose = false;
  bool success = true;
  try {
    bool proc_verbose = false;
    bool leftprec = true; // use left preconditioning to solve these linear systems
    int frequency = -1;  // how often residuals are printed by solver
    int numrhs = 1;
    int maxiters = -1;    // maximum iterations allowed
    std::string filename("orsirr1.hb");
    MT tol = 1.0e-5;  // relative residual tolerance

    Teuchos::CommandLineProcessor cmdp(false,true);
    cmdp.setOption("verbose","quiet",&verbose,"Print messages and results.");
    cmdp.setOption("left-prec","right-prec",&leftprec,"Left preconditioning or right.");
    cmdp.setOption("frequency",&frequency,"Solvers frequency for printing residuals (#iters).");
    cmdp.setOption("filename",&filename,"Filename for Harwell-Boeing test matrix.");
    cmdp.setOption("tol",&tol,"Relative residual tolerance used by GMRES solver.");
    cmdp.setOption("num-rhs",&numrhs,"Number of right-hand sides to be solved for.");
    cmdp.setOption("maxiters",&maxiters,"Maximum number of iterations per linear system (-1 = adapted to problem/block size).");
    if (cmdp.parse(argc,argv) != Teuchos::CommandLineProcessor::PARSE_SUCCESSFUL) {
      return -1;
    }
    if (!verbose)
      frequency = -1;  // reset frequency if test is not verbose
    //
    // Get the problem
    //
    int MyPID;
    RCP<Epetra_CrsMatrix> A;
    int return_val =Belos::Util::createEpetraProblem(filename,NULL,&A,NULL,NULL,&MyPID);
    const Epetra_Map &Map = A->RowMap();
    if(return_val != 0) return return_val;
    proc_verbose = verbose && (MyPID==0); /* Only print on zero processor */
    //
    // *****Construct the Preconditioner*****
    //
    if (proc_verbose) std::cout << std::endl << std::endl;
    if (proc_verbose) std::cout << "Constructing ILU preconditioner" << std::endl;
    int Lfill = 2;
    // if (argc > 2) Lfill = atoi(argv[2]);
    if (proc_verbose) std::cout << "Using Lfill = " << Lfill << std::endl;
    int Overlap = 2;
    // if (argc > 3) Overlap = atoi(argv[3]);
    if (proc_verbose) std::cout << "Using Level Overlap = " << Overlap << std::endl;
    double Athresh = 0.0;
    // if (argc > 4) Athresh = atof(argv[4]);
    if (proc_verbose) std::cout << "Using Absolute Threshold Value of " << Athresh << std::endl;
    double Rthresh = 1.0;
    // if (argc >5) Rthresh = atof(argv[5]);
    if (proc_verbose) std::cout << "Using Relative Threshold Value of " << Rthresh << std::endl;
    //
    Teuchos::RCP<Ifpack_IlukGraph> ilukGraph;
    Teuchos::RCP<Ifpack_CrsRiluk> ilukFactors;
    //
    if (Lfill > -1) {
      ilukGraph = Teuchos::rcp(new Ifpack_IlukGraph(A->Graph(), Lfill, Overlap));
      int info = ilukGraph->ConstructFilledGraph();
      assert( info == 0 );
      ilukFactors = Teuchos::rcp(new Ifpack_CrsRiluk(*ilukGraph));
      int initerr = ilukFactors->InitValues(*A);
      if (initerr != 0) std::cout << "InitValues error = " << initerr;
      info = ilukFactors->Factor();
      assert( info == 0 );
    }
    //
    bool transA = false;
    double Cond_Est;
    ilukFactors->Condest(transA, Cond_Est);
    if (proc_verbose) {
      std::cout << "Condition number estimate for this preconditoner = " << Cond_Est << std::endl;
      std::cout << std::endl;
    }

    //
    // Create the Belos preconditioned operator from the Ifpack preconditioner.
    // NOTE:  This is necessary because Belos expects an operator to apply the
    //        preconditioner with Apply() NOT ApplyInverse().
    RCP<Belos::EpetraPrecOp> Prec = rcp( new Belos::EpetraPrecOp( ilukFactors ) );

    //
    // ********Other information used by block solver***********
    // *****************(can be user specified)******************
    //
    const int NumGlobalElements = Map.NumGlobalElements();
//.........这里部分代码省略.........

int main(int argc, char *argv[]) {
  //
#ifdef EPETRA_MPI	
  MPI_Init(&argc,&argv);
  Belos::MPIFinalize mpiFinalize; // Will call finalize with *any* return
  (void)mpiFinalize;
#endif	
  //
  typedef double                            ST;
  typedef Teuchos::ScalarTraits<ST>        SCT;
  typedef SCT::magnitudeType                MT;
  typedef Epetra_MultiVector                MV;
  typedef Epetra_Operator                   OP;
  typedef Belos::MultiVecTraits<ST,MV>     MVT;
  typedef Belos::OperatorTraits<ST,MV,OP>  OPT;

  using Teuchos::ParameterList;
  using Teuchos::RCP;
  using Teuchos::rcp;

  bool verbose = false, proc_verbose = false;
  bool pseudo = false;   // use pseudo block GMRES to solve this linear system.
  bool leftprec = true; // use left preconditioning to solve these linear systems
  int frequency = -1;  // how often residuals are printed by solver
  int blocksize = 4;
  int numrhs = 15;
  int maxrestarts = 15; // number of restarts allowed 
  int length = 25;
  int maxiters = -1;    // maximum iterations allowed
  std::string filename("orsirr1.hb");
  MT tol = 1.0e-5;  // relative residual tolerance

  Teuchos::CommandLineProcessor cmdp(false,true);
  cmdp.setOption("verbose","quiet",&verbose,"Print messages and results.");
  cmdp.setOption("pseudo","regular",&pseudo,"Use pseudo-block GMRES to solve the linear systems.");
  cmdp.setOption("left-prec","right-prec",&leftprec,"Left preconditioning or right.");
  cmdp.setOption("frequency",&frequency,"Solvers frequency for printing residuals (#iters).");
  cmdp.setOption("filename",&filename,"Filename for Harwell-Boeing test matrix.");
  cmdp.setOption("tol",&tol,"Relative residual tolerance used by GMRES solver.");
  cmdp.setOption("num-rhs",&numrhs,"Number of right-hand sides to be solved for.");
  cmdp.setOption("max-restarts",&maxrestarts,"Maximum number of restarts allowed for GMRES solver.");
  cmdp.setOption("blocksize",&blocksize,"Block size used by GMRES.");
  cmdp.setOption("maxiters",&maxiters,"Maximum number of iterations per linear system (-1 = adapted to problem/block size).");
  cmdp.setOption("subspace-size",&length,"Dimension of Krylov subspace used by GMRES.");  
  if (cmdp.parse(argc,argv) != Teuchos::CommandLineProcessor::PARSE_SUCCESSFUL) {
    return -1;
  }
  if (!verbose)
    frequency = -1;  // reset frequency if test is not verbose
  //
  // Get the problem
  //
  int MyPID;
  RCP<Epetra_CrsMatrix> A;
  int return_val =Belos::createEpetraProblem(filename,NULL,&A,NULL,NULL,&MyPID);
  const Epetra_Map &Map = A->RowMap();
  if(return_val != 0) return return_val;
  proc_verbose = verbose && (MyPID==0); /* Only print on zero processor */
  //
  // *****Construct the Preconditioner*****
  //
  if (proc_verbose) std::cout << std::endl << std::endl;
  if (proc_verbose) std::cout << "Constructing ILU preconditioner" << std::endl;
  int Lfill = 2;
  // if (argc > 2) Lfill = atoi(argv[2]);
  if (proc_verbose) std::cout << "Using Lfill = " << Lfill << std::endl;
  int Overlap = 2;
  // if (argc > 3) Overlap = atoi(argv[3]);
  if (proc_verbose) std::cout << "Using Level Overlap = " << Overlap << std::endl;
  double Athresh = 0.0;
  // if (argc > 4) Athresh = atof(argv[4]);
  if (proc_verbose) std::cout << "Using Absolute Threshold Value of " << Athresh << std::endl;
  double Rthresh = 1.0;
  // if (argc >5) Rthresh = atof(argv[5]);
  if (proc_verbose) std::cout << "Using Relative Threshold Value of " << Rthresh << std::endl;
  //
  Teuchos::RCP<Ifpack_IlukGraph> ilukGraph;
  Teuchos::RCP<Ifpack_CrsRiluk> ilukFactors;
  //
  if (Lfill > -1) {
    ilukGraph = Teuchos::rcp(new Ifpack_IlukGraph(A->Graph(), Lfill, Overlap));
    int info = ilukGraph->ConstructFilledGraph();
    assert( info == 0 );
    ilukFactors = Teuchos::rcp(new Ifpack_CrsRiluk(*ilukGraph));
    int initerr = ilukFactors->InitValues(*A);
    if (initerr != 0) std::cout << "InitValues error = " << initerr;
    info = ilukFactors->Factor();
    assert( info == 0 );
  }
  //
  bool transA = false;
  double Cond_Est;
  ilukFactors->Condest(transA, Cond_Est);
  if (proc_verbose) {
    std::cout << "Condition number estimate for this preconditoner = " << Cond_Est << std::endl;
    std::cout << std::endl;
  }

  //
  // Create the Belos preconditioned operator from the Ifpack preconditioner.
//.........这里部分代码省略.........

int main(int argc, char *argv[]) {
  //
  Teuchos::GlobalMPISession session(&argc, &argv, NULL);
  //
  typedef double                            ST;
  typedef Teuchos::ScalarTraits<ST>        SCT;
  typedef SCT::magnitudeType                MT;
  typedef Epetra_MultiVector                MV;
  typedef Epetra_Operator                   OP;
  typedef Belos::MultiVecTraits<ST,MV>     MVT;
  typedef Belos::OperatorTraits<ST,MV,OP>  OPT;

  using Teuchos::ParameterList;
  using Teuchos::RCP;
  using Teuchos::rcp;

  bool verbose = false;
  bool success = false;
  try {
    bool proc_verbose = false;
    bool leftprec = true;  // use left preconditioning to solve these linear systems
    int frequency = -1;    // how often residuals are printed by solver
    int init_numrhs = 5;   // how many right-hand sides get solved first
    int aug_numrhs = 10;   // how many right-hand sides are augmented to the first group
    int maxrestarts = 15;  // number of restarts allowed
    int length = 50;
    int init_blocksize = 5;// blocksize used for the initial pseudo-block GMRES solve
    int aug_blocksize = 3; // blocksize used for the augmented pseudo-block GMRES solve
    int maxiters = -1;     // maximum iterations allowed
    std::string filename("orsirr1.hb");
    MT tol = 1.0e-5;       // relative residual tolerance
    MT aug_tol = 1.0e-5;   // relative residual tolerance for augmented system

    Teuchos::CommandLineProcessor cmdp(false,true);
    cmdp.setOption("verbose","quiet",&verbose,"Print messages and results.");
    cmdp.setOption("frequency",&frequency,"Solvers frequency for printing residuals (#iters).");
    cmdp.setOption("left-prec","right-prec",&leftprec,"Left preconditioning or right.");
    cmdp.setOption("filename",&filename,"Filename for Harwell-Boeing test matrix.");
    cmdp.setOption("tol",&tol,"Relative residual tolerance used by GMRES solver.");
    cmdp.setOption("aug-tol",&aug_tol,"Relative residual tolerance used by GMRES solver for augmented systems.");
    cmdp.setOption("init-num-rhs",&init_numrhs,"Number of right-hand sides to be initially solved for.");
    cmdp.setOption("aug-num-rhs",&aug_numrhs,"Number of right-hand sides augmenting the initial solve.");
    cmdp.setOption("max-restarts",&maxrestarts,"Maximum number of restarts allowed for GMRES solver.");
    cmdp.setOption("block-size",&init_blocksize,"Block size used by GMRES for the initial solve.");
    cmdp.setOption("aug-block-size",&aug_blocksize,"Block size used by GMRES for the augmented solve.");
    cmdp.setOption("max-iters",&maxiters,"Maximum number of iterations per linear system (-1 = adapted to problem/block size).");
    cmdp.setOption("subspace-size",&length,"Dimension of Krylov subspace used by GMRES.");
    if (cmdp.parse(argc,argv) != Teuchos::CommandLineProcessor::PARSE_SUCCESSFUL) {
      return -1;
    }
    if (!verbose)
      frequency = -1;  // reset frequency if test is not verbose
    //
    // Get the problem
    //
    int MyPID;
    RCP<Epetra_CrsMatrix> A;
    int return_val =Belos::createEpetraProblem(filename,NULL,&A,NULL,NULL,&MyPID);
    const Epetra_Map &Map = A->RowMap();
    if(return_val != 0) return return_val;
    proc_verbose = verbose && (MyPID==0); /* Only print on zero processor */
    //
    // *****Construct the Preconditioner*****
    //
    if (proc_verbose) std::cout << std::endl << std::endl;
    if (proc_verbose) std::cout << "Constructing ILU preconditioner" << std::endl;
    int Lfill = 2;
    // if (argc > 2) Lfill = atoi(argv[2]);
    if (proc_verbose) std::cout << "Using Lfill = " << Lfill << std::endl;
    int Overlap = 2;
    // if (argc > 3) Overlap = atoi(argv[3]);
    if (proc_verbose) std::cout << "Using Level Overlap = " << Overlap << std::endl;
    double Athresh = 0.0;
    // if (argc > 4) Athresh = atof(argv[4]);
    if (proc_verbose) std::cout << "Using Absolute Threshold Value of " << Athresh << std::endl;
    double Rthresh = 1.0;
    // if (argc >5) Rthresh = atof(argv[5]);
    if (proc_verbose) std::cout << "Using Relative Threshold Value of " << Rthresh << std::endl;
    //
    Teuchos::RCP<Ifpack_IlukGraph> ilukGraph;
    Teuchos::RCP<Ifpack_CrsRiluk> ilukFactors;
    //
    if (Lfill > -1) {
      ilukGraph = Teuchos::rcp(new Ifpack_IlukGraph(A->Graph(), Lfill, Overlap));
      int info = ilukGraph->ConstructFilledGraph();
      assert( info == 0 );
      ilukFactors = Teuchos::rcp(new Ifpack_CrsRiluk(*ilukGraph));
      int initerr = ilukFactors->InitValues(*A);
      if (initerr != 0) std::cout << "InitValues error = " << initerr;
      info = ilukFactors->Factor();
      assert( info == 0 );
    }
    //
    bool transA = false;
    double Cond_Est;
    ilukFactors->Condest(transA, Cond_Est);
    if (proc_verbose) {
      std::cout << "Condition number estimate for this preconditoner = " << Cond_Est << std::endl;
      std::cout << std::endl;
    }
//.........这里部分代码省略.........