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MueLu_AMGXOperator_def.hpp
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46 
47 #ifndef MUELU_AMGXOPERATOR_DEF_HPP
48 #define MUELU_AMGXOPERATOR_DEF_HPP
49 
50 
51 #if defined (HAVE_MUELU_AMGX)
53 
54 namespace MueLu {
55 
56  template<class Node>
57  Teuchos::RCP<const Tpetra::Map<int,int,Node> >
59  return domainMap_;
60  }
61 
62  template<class Node>
63  Teuchos::RCP<const Tpetra::Map<int,int,Node> > AMGXOperator<double,int,int,Node>::getRangeMap() const {
64  return rangeMap_;
65  }
66 
67  template<class Node>
68  void AMGXOperator<double,int,int,Node>::apply(const Tpetra::MultiVector<double,int,int,Node>& X,
69  Tpetra::MultiVector<double,int,int,Node>& Y,
70  Teuchos::ETransp mode, double alpha, double beta) const {
71 
72  RCP<const Teuchos::Comm<int> > comm = Y.getMap()->getComm();
73 
74  ArrayRCP<const double> mueluXdata, amgxXdata;
75  ArrayRCP<double> mueluYdata, amgxYdata;
76 
77  try {
78  for (int i = 0; i < (int)Y.getNumVectors(); i++) {
79  {
80  vectorTimer1_->start();
81 
82  mueluXdata = X.getData(i);
83  mueluYdata = Y.getDataNonConst(i);
84 
85  if (comm->getSize() == 1) {
86  amgxXdata = mueluXdata;
87  amgxYdata = mueluYdata;
88 
89  } else {
90  int n = mueluXdata.size();
91 
92  amgxXdata.resize(n);
93  amgxYdata.resize(n);
94 
95  ArrayRCP<double> amgxXdata_nonConst = Teuchos::arcp_const_cast<double>(amgxXdata);
96  for (int j = 0; j < n; j++) {
97  amgxXdata_nonConst[muelu2amgx_[j]] = mueluXdata[j];
98  amgxYdata [muelu2amgx_[j]] = mueluYdata[j];
99  }
100  }
101 
102  AMGX_vector_upload(X_, N_, 1, &amgxXdata[0]);
103  AMGX_vector_upload(Y_, N_, 1, &amgxYdata[0]);
104 
105  vectorTimer1_->stop();
106  vectorTimer1_->incrementNumCalls();
107  }
108 
109  // Solve the system and time.
110  solverTimer_->start();
111  AMGX_solver_solve(Solver_, X_, Y_);
112  solverTimer_->stop();
113  solverTimer_->incrementNumCalls();
114 
115  {
116  vectorTimer2_->start();
117 
118  AMGX_vector_download(Y_, &amgxYdata[0]);
119 
120  if (comm->getSize() > 1) {
121  int n = mueluYdata.size();
122 
123  for (int j = 0; j < n; j++)
124  mueluYdata[j] = amgxYdata[muelu2amgx_[j]];
125  }
126 
127  vectorTimer2_->stop();
128  vectorTimer2_->incrementNumCalls();
129  }
130  }
131 
132  } catch (std::exception& e) {
133  std::string errMsg = std::string("Caught an exception in MueLu::AMGXOperator::Apply():\n") + e.what() + "\n";
134  throw Exceptions::RuntimeError(errMsg);
135  }
136  }
137 
138  template<class Node>
140  return false;
141  }
142 
143 } // namespace
144 #endif //if defined(HAVE_MUELU_AMGX)
145 
146 #endif //ifdef MUELU_AMGXOPERATOR_DEF_HPP
bool hasTransposeApply() const
Indicates whether this operator supports applying the adjoint operator.
Teuchos::RCP< const Map > getDomainMap() const
Returns the Tpetra::Map object associated with the domain of this operator.
Namespace for MueLu classes and methods.
Teuchos::RCP< const Map > getRangeMap() const
Returns the Tpetra::Map object associated with the range of this operator.
void apply(const MultiVector &X, MultiVector &Y, Teuchos::ETransp mode=Teuchos::NO_TRANS, Scalar alpha=Teuchos::ScalarTraits< Scalar >::one(), Scalar beta=Teuchos::ScalarTraits< Scalar >::zero()) const
Returns a solution for the linear system AX=Y in the Tpetra::MultiVector X.
Exception throws to report errors in the internal logical of the program.