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MueLu_Aggregates_def.hpp
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46 #ifndef MUELU_AGGREGATES_DEF_HPP
47 #define MUELU_AGGREGATES_DEF_HPP
48 
49 #include <Xpetra_Map.hpp>
50 #include <Xpetra_Vector.hpp>
51 #include <Xpetra_MultiVector.hpp>
53 #include <Xpetra_BlockedVector.hpp>
54 #include <Xpetra_VectorFactory.hpp>
56 
58 #include "MueLu_Graph.hpp"
59 #include "MueLu_Utilities_decl.hpp" // MueLu_sumAll
60 
61 namespace MueLu {
62 
64  template <class LocalOrdinal, class GlobalOrdinal, class Node>
66  nAggregates_ = 0;
67 
68  vertex2AggId_ = LOMultiVectorFactory::Build(graph.GetImportMap(), 1);
69  vertex2AggId_->putScalar(MUELU_UNAGGREGATED);
70 
71  procWinner_ = LOVectorFactory::Build(graph.GetImportMap());
72  procWinner_->putScalar(MUELU_UNASSIGNED);
73 
74  isRoot_ = Teuchos::ArrayRCP<bool>(graph.GetImportMap()->getNodeNumElements(), false);
75 
76  // slow but safe, force TentativePFactory to build column map for P itself
77  aggregatesIncludeGhosts_ = true;
78  }
79 
81  template <class LocalOrdinal, class GlobalOrdinal, class Node>
83  nAggregates_ = 0;
84 
85  vertex2AggId_ = LOMultiVectorFactory::Build(map, 1);
86  vertex2AggId_->putScalar(MUELU_UNAGGREGATED);
87 
88  procWinner_ = LOVectorFactory::Build(map);
89  procWinner_->putScalar(MUELU_UNASSIGNED);
90 
91  isRoot_ = Teuchos::ArrayRCP<bool>(map->getNodeNumElements(), false);
92 
93  // slow but safe, force TentativePFactory to build column map for P itself
94  aggregatesIncludeGhosts_ = true;
95  }
96 
98  template <class LocalOrdinal, class GlobalOrdinal, class Node>
100 
101  if (aggregateSizes_ != Teuchos::null && !forceRecompute) {
102 
103  return aggregateSizes_;
104 
105  } else {
106 
107  //invalidate previous sizes.
108  aggregateSizes_ = Teuchos::null;
109 
110  Teuchos::ArrayRCP<LO> aggregateSizes;
111  aggregateSizes = Teuchos::ArrayRCP<LO>(nAggregates_,0);
112  int myPid = vertex2AggId_->getMap()->getComm()->getRank();
113  Teuchos::ArrayRCP<LO> procWinner = procWinner_->getDataNonConst(0);
114  Teuchos::ArrayRCP<LO> vertex2AggId = vertex2AggId_->getDataNonConst(0);
115  LO size = procWinner.size();
116 
117  //for (LO i = 0; i < nAggregates_; ++i) aggregateSizes[i] = 0;
118  for (LO k = 0; k < size; ++k ) {
119  if (procWinner[k] == myPid) aggregateSizes[vertex2AggId[k]]++;
120  }
121 
122  aggregateSizes_ = aggregateSizes;
123 
124  return aggregateSizes;
125  }
126 
127  } //ComputeAggSizesNodes
128 
129  template <class LocalOrdinal, class GlobalOrdinal, class Node>
131  std::ostringstream out;
132  out << BaseClass::description();
133  out << "{nGlobalAggregates = " << GetNumGlobalAggregates() << "}";
134  return out.str();
135  }
136 
137  template <class LocalOrdinal, class GlobalOrdinal, class Node>
140 
141  if (verbLevel & Statistics1)
142  out0 << "Global number of aggregates: " << GetNumGlobalAggregates() << std::endl;
143  }
144 
145  template <class LocalOrdinal, class GlobalOrdinal, class Node>
147  LO nAggregates = GetNumAggregates();
148  GO nGlobalAggregates; MueLu_sumAll(vertex2AggId_->getMap()->getComm(), (GO)nAggregates, nGlobalAggregates);
149  return nGlobalAggregates;
150  }
151 
152  template <class LocalOrdinal, class GlobalOrdinal, class Node>
154  return vertex2AggId_->getMap();
155  }
156 
157 } //namespace MueLu
158 
159 #endif // MUELU_AGGREGATES_DEF_HPP
#define MUELU_UNASSIGNED
#define MueLu_sumAll(rcpComm, in, out)
GlobalOrdinal GO
Print more statistics.
const RCP< const Map > GetMap() const
returns (overlapping) map of aggregate/node distribution
LocalOrdinal LO
size_type size() const
Teuchos::ArrayRCP< LO > ComputeAggregateSizes(bool forceRecompute=false) const
Compute sizes of aggregates.
GO GetNumGlobalAggregates() const
Get global number of aggregates.
Aggregates(const GraphBase &graph)
Standard constructor for Aggregates structure.
#define MUELU_UNAGGREGATED
#define MUELU_DESCRIBE
Helper macro for implementing Describable::describe() for BaseClass objects.
MueLu representation of a graph.
virtual const RCP< const Map > GetImportMap() const =0
void print(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=verbLevel_default) const
Print the object with some verbosity level to an FancyOStream object.
std::string description() const
Return a simple one-line description of this object.
virtual std::string description() const
Return a simple one-line description of this object.