MueLu_AggregationPhase1Algorithm_kokkos_decl.hpp

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#ifndef MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_DECL_HPP
#define MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_DECL_HPP

#include "MueLu_ConfigDefs.hpp"
#ifdef HAVE_MUELU_KOKKOS_REFACTOR

#include <KokkosCompat_ClassicNodeAPI_Wrapper.hpp>

#include "MueLu_AggregationPhase1Algorithm_kokkos_fwd.hpp"

#include "MueLu_Aggregates_kokkos_fwd.hpp"
#include "MueLu_AggregationAlgorithmBase_kokkos.hpp"
#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_LWGraph_kokkos.hpp"

namespace MueLu {
  template<class LocalOrdinal = DefaultLocalOrdinal,
           class GlobalOrdinal = DefaultGlobalOrdinal,
           class Node = DefaultNode>
  class AggregationPhase1Algorithm_kokkos :
    public MueLu::AggregationAlgorithmBase_kokkos<LocalOrdinal,GlobalOrdinal,Node> {
#undef MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_SHORT
#include "MueLu_UseShortNamesOrdinal.hpp"

  public:
    using memory_space = typename LWGraph_kokkos::memory_space;



    AggregationPhase1Algorithm_kokkos(const RCP<const FactoryBase>& /* graphFact */ = Teuchos::null) { }

    virtual ~AggregationPhase1Algorithm_kokkos() { }





    void BuildAggregates(const Teuchos::ParameterList& params,
                         const LWGraph_kokkos& graph,
                         Aggregates_kokkos& aggregates,
                         Kokkos::View<unsigned*, memory_space>& aggStat,
                         LO& numNonAggregatedNodes) const;

    void BuildAggregatesSerial(const LWGraph_kokkos& graph, Aggregates_kokkos& aggregates,
                               std::vector<unsigned>& aggStat, LO& numNonAggregatedNodes,
                               LO minNodesPerAggregate, LO maxNodesPerAggregate,
                               LO maxNeighAlreadySelected, std::string& orderingStr) const;

    void BuildAggregatesDistance2(const LO maxAggSize,
                                  const LWGraph_kokkos& graph,
                                  Aggregates_kokkos& aggregates,
                                  Kokkos::View<unsigned*, memory_space>& aggStat,
                                  LO& numNonAggregatedNodes) const;

    void BuildAggregatesDeterministic(const LO maxAggSize,
                                      const LWGraph_kokkos& graph,
                                      Aggregates_kokkos& aggregates,
                                      Kokkos::View<unsigned*, memory_space>& aggStat,
                                      LO& numNonAggregatedNodes) const;

    std::string description() const { return "Phase 1 (main)"; }

    enum struct Algorithm
    {
      Serial,
      Distance2
    };

    static Algorithm algorithmFromName(const std::string& name)
    {
      if(name == "Distance2")
        return Algorithm::Distance2;
      return Algorithm::Serial;
    }

  private:

    void RandomReorder(ArrayRCP<LO> list) const;

    int RandomOrdinal(int min, int max) const;

  };

} //namespace MueLu

#define MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_SHORT
#endif // HAVE_MUELU_KOKKOS_REFACTOR
#endif // MUELU_AGGREGATIONPHASE1ALGORITHM_KOKKOS_DECL_HPP