Tpetra::Details::Impl::GetGraphOffRankOffsets< LO, GO, DeviceType, OffsetType > Class Template Reference

Implementation detail of Tpetra::Details::getGraphOffRankOffsets, which in turn is an implementation detail of Tpetra::CrsGraph. More...

#include <Tpetra_Details_getGraphOffRankOffsets_decl.hpp>

Public Member Functions
	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)
	Constructor; also runs the functor. More...
KOKKOS_FUNCTION void	operator() (const LO &lclRowInd) const
	Kokkos::parallel_for loop body. More...

Detailed Description

template<class LO, class GO, class DeviceType, class OffsetType = size_t>
class Tpetra::Details::Impl::GetGraphOffRankOffsets< LO, GO, DeviceType, OffsetType >

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.

Definition at line 79 of file Tpetra_Details_getGraphOffRankOffsets_decl.hpp.

Constructor & Destructor Documentation

template<class LO , class GO , class Node , class OffsetType >

Tpetra::Details::Impl::GetGraphOffRankOffsets< LO, GO, Node, OffsetType >::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
	)

Constructor; also runs the functor.

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.

Definition at line 78 of file Tpetra_Details_getGraphOffRankOffsets_def.hpp.

Member Function Documentation

template<class LO , class GO , class Node , class OffsetType >

KOKKOS_FUNCTION void Tpetra::Details::Impl::GetGraphOffRankOffsets< LO, GO, Node, OffsetType >::operator()

(

const LO &

lclRowInd

)

const

Kokkos::parallel_for loop body.

Definition at line 103 of file Tpetra_Details_getGraphOffRankOffsets_def.hpp.

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The documentation for this class was generated from the following files:

• Tpetra_Details_getGraphOffRankOffsets_decl.hpp
• Tpetra_Details_getGraphOffRankOffsets_def.hpp