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MueLu: Refactor LWGraphs #12629
MueLu: Refactor LWGraphs #12629
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This is a test
packages/muelu/adapters/stratimikos/Thyra_MueLuTpetraQ2Q1PreconditionerFactory_def.hpp
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@cgcgcg and I discussed that if this isn't a Tpetra::CrsGraph, then calling the class "Graph" might be confusion. Calling this "LWGraph" removes this confusion.
maxLocalIndex_ = domainMap_->getMaxLocalIndex(); | ||
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MaxNumRowEntriesFunctor<LO, typename local_graph_type::row_map_type> maxNumRowEntriesFunctor(graph_.row_map); | ||
Kokkos::parallel_reduce("MueLu:LocalLWGraph:LWGraph:maxnonzeros", range_type(0, graph_.numRows()), maxNumRowEntriesFunctor, maxNumRowEntries_); |
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This seems to always happen on device. Is this intended?
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This runs on host or device, depending on the value of the template argument OnHost
:
Trilinos/packages/muelu/src/Graph/Containers/MueLu_LWGraphBase.hpp
Lines 116 to 119 in cb67a96
using device_type = typename std::conditional<OnHost, | |
Kokkos::Device<Kokkos::Serial, Kokkos::HostSpace>, | |
typename Node::device_type>::type; | |
using execution_space = typename device_type::execution_space; |
using range_type = Kokkos::RangePolicy<local_ordinal_type, execution_space>; |
Let's retest to make sure the new H2D test runs. |
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@trilinos/muelu
Motivation
This PR changes the graph classes MueLu uses for aggregation. The goal is to use the same data structures for the old non-Kokkos aggregation code path and the new Kokkos one.
MueLu::GraphBase
,MueLu::Graph
,MueLu::LocalLWGraph_kokkos
MueLu::LWGraphBase
MueLu::LWGraph
andMueLu::LWGraph_kokkos
now are both just partial specializations ofMueLu::LWGraphBase
Part of #11658.