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MueLu_CoarseMapFactory_kokkos_def.hpp
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5// MueLu: A package for multigrid based preconditioning
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46#ifndef MUELU_COARSEMAPFACTORY_KOKKOS_DEF_HPP_
47#define MUELU_COARSEMAPFACTORY_KOKKOS_DEF_HPP_
48
50
51#include <Teuchos_Array.hpp>
52
53#include <Xpetra_MultiVector.hpp>
54
55#include "MueLu_Level.hpp"
56#include "MueLu_Aggregates_kokkos.hpp"
57#include "MueLu_Monitor.hpp"
58
59namespace MueLu {
60
61 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class DeviceType>
63 RCP<ParameterList> validParamList = rcp(new ParameterList());
64
65 validParamList->set<RCP<const FactoryBase> >("Aggregates", Teuchos::null, "Generating factory for aggregates.");
66 validParamList->set<RCP<const FactoryBase> >("Nullspace", Teuchos::null, "Generating factory for null space.");
67
68 return validParamList;
69 }
70
71 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class DeviceType>
73 Input(currentLevel, "Aggregates");
74 Input(currentLevel, "Nullspace");
75 }
76
77 template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class DeviceType>
79 FactoryMonitor m(*this, "Build", currentLevel);
80
81 auto aggregates = Get<RCP<Aggregates_kokkos> >(currentLevel, "Aggregates");
82 auto nullspace = Get<RCP<MultiVector> > (currentLevel, "Nullspace");
83
84 auto map = aggregates->GetMap();
85
86 const GO numAggs = aggregates->GetNumAggregates();
87 const size_t NSDim = nullspace->getNumVectors();
88
89 GlobalOrdinal numCoarseDofs = numAggs * NSDim;
90
91 std::vector<size_t> stridingInfo(1);
92 stridingInfo[0] = NSDim;
93
94 auto INVALID = Teuchos::OrdinalTraits<Xpetra::global_size_t>::invalid();
95 RCP<const Map> coarseMap = StridedMapFactory::Build(map->lib(), INVALID, numCoarseDofs, map->getIndexBase(), stridingInfo, map->getComm());
96
97 Set(currentLevel, "CoarseMap", coarseMap);
98 }
99
100} //namespace MueLu
101
102#endif /* MUELU_COARSEMAPFACTORY_KOKKOS_DEF_HPP_ */
MueLu::DefaultGlobalOrdinal GlobalOrdinal
Timer to be used in factories. Similar to Monitor but with additional timers.
Class that holds all level-specific information.
Namespace for MueLu classes and methods.