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Tpetra CrsGraph: Add method "getLocalOffRankOffsets"
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67 changes: 67 additions & 0 deletions
67
packages/tpetra/core/src/Tpetra_Details_getGraphOffRankOffsets.cpp
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| /* | ||
| // @HEADER | ||
| // *********************************************************************** | ||
| // | ||
| // Tpetra: Templated Linear Algebra Services Package | ||
| // Copyright (2008) Sandia Corporation | ||
| // | ||
| // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation, | ||
| // the U.S. Government retains certain rights in this software. | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions are | ||
| // met: | ||
| // | ||
| // 1. Redistributions of source code must retain the above copyright | ||
| // notice, this list of conditions and the following disclaimer. | ||
| // | ||
| // 2. Redistributions in binary form must reproduce the above copyright | ||
| // notice, this list of conditions and the following disclaimer in the | ||
| // documentation and/or other materials provided with the distribution. | ||
| // | ||
| // 3. Neither the name of the Corporation nor the names of the | ||
| // contributors may be used to endorse or promote products derived from | ||
| // this software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY | ||
| // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
| // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE | ||
| // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
| // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
| // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
| // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
| // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
| // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
| // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| // | ||
| // Questions? Contact Michael A. Heroux ([email protected]) | ||
| // | ||
| // ************************************************************************ | ||
| // @HEADER | ||
| */ | ||
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| #include "TpetraCore_config.h" | ||
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| #if defined(HAVE_TPETRA_EXPLICIT_INSTANTIATION) | ||
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| // We protect the contents of this file with macros, to assist | ||
| // applications that circumvent Trilinos' build system. (We do NOT | ||
| // recommend this.) That way, they can still build this file, but as | ||
| // long as the macros have correct definitions, they won't build | ||
| // anything that's not enabled. | ||
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| #include "KokkosCompat_ClassicNodeAPI_Wrapper.hpp" | ||
| #include "Tpetra_Details_getGraphOffRankOffsets_decl.hpp" | ||
| #include "Tpetra_Details_getGraphOffRankOffsets_def.hpp" | ||
| #include "TpetraCore_ETIHelperMacros.h" | ||
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| namespace Tpetra { | ||
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| TPETRA_ETI_MANGLING_TYPEDEFS() | ||
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| TPETRA_INSTANTIATE_LGN( TPETRA_DETAILS_IMPL_GETGRAPHOFFRANKOFFSETS_INSTANT ) | ||
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| } // namespace Tpetra | ||
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| #endif // Whether we should build this specialization |
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packages/tpetra/core/src/Tpetra_Details_getGraphOffRankOffsets_decl.hpp
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| /* | ||
| // @HEADER | ||
| // *********************************************************************** | ||
| // | ||
| // Tpetra: Templated Linear Algebra Services Package | ||
| // Copyright (2008) Sandia Corporation | ||
| // | ||
| // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation, | ||
| // the U.S. Government retains certain rights in this software. | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions are | ||
| // met: | ||
| // | ||
| // 1. Redistributions of source code must retain the above copyright | ||
| // notice, this list of conditions and the following disclaimer. | ||
| // | ||
| // 2. Redistributions in binary form must reproduce the above copyright | ||
| // notice, this list of conditions and the following disclaimer in the | ||
| // documentation and/or other materials provided with the distribution. | ||
| // | ||
| // 3. Neither the name of the Corporation nor the names of the | ||
| // contributors may be used to endorse or promote products derived from | ||
| // this software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY | ||
| // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
| // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE | ||
| // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
| // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
| // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
| // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
| // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
| // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
| // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| // | ||
| // Questions? Contact Michael A. Heroux ([email protected]) | ||
| // | ||
| // ************************************************************************ | ||
| // @HEADER | ||
| */ | ||
|
|
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| #ifndef TPETRA_DETAILS_GETGRAPHOFFRANKOFFSETS_DECL_HPP | ||
| #define TPETRA_DETAILS_GETGRAPHOFFRANKOFFSETS_DECL_HPP | ||
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| /// \file Tpetra_Details_getGraphOffRankOffsets_decl.hpp | ||
| /// \brief Declare and define the function | ||
| /// Tpetra::Details::getGraphOffRankOffsets, an implementation detail | ||
| /// of Tpetra::CrsGraph. | ||
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| #include "TpetraCore_config.h" | ||
| #include "Kokkos_Core.hpp" | ||
| #include "Kokkos_StaticCrsGraph.hpp" | ||
| #include "Tpetra_Details_LocalMap.hpp" | ||
| #include <type_traits> | ||
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| namespace Tpetra { | ||
| namespace Details { | ||
| namespace Impl { | ||
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| /// \brief Implementation detail of | ||
| /// Tpetra::Details::getGraphOffRankOffsets, which in turn is an | ||
| /// implementation detail of Tpetra::CrsGraph. | ||
| /// | ||
| /// FIXME (mfh 12 Mar 2016) There's currently no way to make a | ||
| /// MemoryUnmanaged Kokkos::StaticCrsGraph. Thus, we have to do this | ||
| /// separately for its column indices. We want the column indices to | ||
| /// be unmanaged because we need to take subviews in this kernel. | ||
| /// Taking a subview of a managed View updates the reference count, | ||
| /// which is a thread scalability bottleneck. | ||
| /// | ||
| /// mfh 12 Mar 2016: Tpetra::CrsGraph::getLocalOffRankOffsets returns | ||
| /// offsets as size_t. However, see Github Issue #213. | ||
| template<class LO, | ||
| class GO, | ||
| class DeviceType, | ||
| class OffsetType = size_t> | ||
| class GetGraphOffRankOffsets { | ||
| public: | ||
| typedef typename DeviceType::device_type device_type; | ||
| typedef OffsetType offset_type; | ||
| typedef ::Kokkos::View<offset_type*, | ||
| device_type, | ||
| ::Kokkos::MemoryUnmanaged> offsets_type; | ||
| typedef ::Kokkos::StaticCrsGraph<LO, | ||
| ::Kokkos::LayoutLeft, | ||
| device_type, | ||
| void, size_t> local_graph_type; | ||
| typedef ::Tpetra::Details::LocalMap<LO, GO, device_type> local_map_type; | ||
| typedef ::Kokkos::View<const typename local_graph_type::size_type*, | ||
| ::Kokkos::LayoutLeft, | ||
| device_type, | ||
| ::Kokkos::MemoryUnmanaged> row_offsets_type; | ||
| // This is unmanaged for performance, because we need to take | ||
| // subviews inside the functor. | ||
| typedef ::Kokkos::View<const LO*, | ||
| ::Kokkos::LayoutLeft, | ||
| device_type, | ||
| ::Kokkos::MemoryUnmanaged> lcl_col_inds_type; | ||
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| //! Constructor; also runs the functor. | ||
| GetGraphOffRankOffsets (const offsets_type& OffRankOffsets, | ||
| const local_map_type& lclColMap, | ||
| const local_map_type& lclDomMap, | ||
| const row_offsets_type& ptr, | ||
| const lcl_col_inds_type& ind); | ||
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| //! Kokkos::parallel_for loop body. | ||
| KOKKOS_FUNCTION void operator() (const LO& lclRowInd) const; | ||
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| private: | ||
| offsets_type OffRankOffsets_; | ||
| local_map_type lclColMap_; | ||
| local_map_type lclDomMap_; | ||
| row_offsets_type ptr_; | ||
| lcl_col_inds_type ind_; | ||
| LO lclNumRows_; | ||
| }; | ||
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| } // namespace Impl | ||
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| template<class OffsetsType, | ||
| class LclMapType, | ||
| class LclGraphType> | ||
| void | ||
| getGraphOffRankOffsets (const OffsetsType& OffRankOffsets, | ||
| const LclMapType& lclColMap, | ||
| const LclMapType& lclDomMap, | ||
| const LclGraphType& lclGraph) | ||
| { | ||
| typedef typename OffsetsType::non_const_value_type offset_type; | ||
| typedef typename LclMapType::local_ordinal_type LO; | ||
| typedef typename LclMapType::global_ordinal_type GO; | ||
| typedef typename LclMapType::device_type DT; | ||
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| typedef Impl::GetGraphOffRankOffsets<LO, GO, DT, offset_type> impl_type; | ||
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| // The functor's constructor runs the functor. | ||
| impl_type impl (OffRankOffsets, lclColMap, lclDomMap, lclGraph.row_map, lclGraph.entries); | ||
| } | ||
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| } // namespace Details | ||
| } // namespace Tpetra | ||
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| #endif // TPETRA_DETAILS_GETGRAPHOFFRANKOFFSETS_DECL_HPP |
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