Cut down on the number of AccessTraits #967

aprokop · 2023-11-01T14:34:00Z

The goal is to avoid using AccessTraits internally in ArborX, only at the user interface functions. Motivated by #729, and in preparation for RangeTraits introduction.

aprokop · 2023-11-02T17:25:01Z

@dalg24 I checked performance using DBSCAN driver on A100 (both DBSCAN and MST), and have not observed any differences. Gitlab CI is clean too.

aprokop · 2023-11-03T17:16:21Z

Updated the PR to include AccessTraits<Predicates, PredicatesTag. Will check the performance again.

aprokop · 2023-11-04T18:49:44Z

CUDA 11.0.3 has something weird

ptxas fatal   : Unresolved extern function '_ZN6ArborX12AccessTraitsIN6Kokkos4ViewIPNS_10IntersectsINS_3BoxEEEJNS1_6DeviceINS1_4CudaENS1_9CudaSpaceEEEEEENS_13PredicatesTagEvE3getERKSB_i'

(aka ArborX::AccessTraits<Kokkos::View<ArborX::Intersects<ArborX::Box>*, Kokkos::Device<Kokkos::Cuda, Kokkos::CudaSpace> >, ArborX::PredicatesTag, void>::get(Kokkos::View<ArborX::Intersects<ArborX::Box>*, Kokkos::Device<Kokkos::Cuda, Kokkos::CudaSpace> > const&, int))

This looks like a compiler bug, but I don't know how to fix.

masterleinad · 2023-11-02T20:23:19Z

benchmarks/dbscan/ArborX_DBSCANVerification.hpp

+                                       ArborX::Details::PairIndexVolume<Point>>
+      bvh(exec_space, ArborX::Details::LegacyValues<Points, Point>{points});


This changes the leaf node type as well, right?

Yes. Instead of storing boxes, it will now store points. It was an oversight from some previous PRs.

masterleinad · 2023-11-06T13:27:54Z

src/ArborX_BruteForce.hpp

@@ -63,23 +63,23 @@ class BasicBruteForce
  void query(ExecutionSpace const &space, Predicates const &predicates,
             Callback const &callback, Ignore = Ignore()) const;

-  template <typename ExecutionSpace, typename Predicates,
+  template <typename ExecutionSpace, typename UserPredicates,


Why do you only change the name here and not in the other overloads? I would rather change the name in the implementation than in the interface. Maybe Predicates->PredicatesAccessor.

I changed the name only here because we will wrap the provided predicates in AccessValues. In other places, where no wrapping is done, it does not matter.

I don't feel strongly either way.

src/ArborX_DBSCAN.hpp

masterleinad · 2023-11-06T15:55:59Z

src/details/ArborX_AccessTraits.hpp

@@ -199,16 +199,18 @@ void check_valid_access_traits(PrimitivesTag, Primitives const &,
  }
 }

-template <typename Values>
+template <typename Values, typename Tag = PrimitivesTag>


If multiple tags can be used, I would rather not have a default value.

I thought about it. The thing is that in this case it would increase of size of this patch, as I would also have to change all places where I used AccessValues for primitives. I am not sure I want to do this.

As long as it's a separate commit, it's pretty clean/clear.

The goal is to avoid using AccessTraits internally in ArborX, only at the user interface functions. In preparation for RangeTraits introduction.

aprokop · 2023-12-07T00:39:56Z

DroppingAccessTraits<Predicates, PredicatesTag> from this PR. This should avoid CUDA-11.0.3 build issue, and unlock #969.

aprokop · 2023-12-07T02:16:29Z

Everything passes except HIP OOM.

dalg24 · 2023-11-02T03:23:26Z

src/ArborX_DBSCAN.hpp

@@ -263,8 +239,8 @@ dbscan(ExecutionSpace const &exec_space, Primitives const &primitives,
 {
  Kokkos::Profiling::pushRegion("ArborX::DBSCAN");

-  using Access = AccessTraits<Primitives, PrimitivesTag>;
-  using MemorySpace = typename Access::memory_space;
+  using Points = Details::AccessValues<Primitives>;


What is the reasoning for the parameters naming in DBSCAN?
It went for Primitives/Points as compared to the spatial indexes where we did UserValues/Values.

OK I see below that we assert the value type is point.

Generally, I try to name the variables based on the context. In DBSCAN, the values are points and nothing else. Spatial indexes have to deal with unknown values, and I thus call them UserValues. I use Primitives as something that has valid AccessTraits as a rule of thumb, to indicate that it uses the old interface.

src/details/ArborX_MinimumSpanningTree.hpp

aprokop added the refactoring Code reorganization label Nov 1, 2023

aprokop mentioned this pull request Nov 1, 2023

API v2 tracker #872

Open

aprokop force-pushed the access_traits_proliferation_primitives branch from 7c3118f to 15f9594 Compare November 1, 2023 14:40

aprokop changed the title ~~Cut down on the number of Access<Primitives, PrimitivesTag>~~ Cut down on the number of AccessTraits<Primitives, PrimitivesTag> Nov 1, 2023

aprokop force-pushed the access_traits_proliferation_primitives branch from 15f9594 to cd40a3d Compare November 3, 2023 17:15

aprokop changed the title ~~Cut down on the number of AccessTraits<Primitives, PrimitivesTag>~~ Cut down on the number of AccessTraits Nov 3, 2023

masterleinad reviewed Nov 6, 2023

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aprokop mentioned this pull request Nov 27, 2023

Consider increasing the minimum nvcc version from 11.0.3 to 11.4+ #974

Open

Cut down on the number of AccessTraits<Primitives, PrimitivesTag>

e70bd45

The goal is to avoid using AccessTraits internally in ArborX, only at the user interface functions. In preparation for RangeTraits introduction.

aprokop force-pushed the access_traits_proliferation_primitives branch 2 times, most recently from aa590f6 to e70bd45 Compare December 7, 2023 00:39

aprokop requested review from masterleinad and dalg24 December 7, 2023 02:16

dalg24 approved these changes Dec 7, 2023

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aprokop merged commit 5a8d82e into arborx:master Dec 7, 2023
1 of 2 checks passed

aprokop deleted the access_traits_proliferation_primitives branch December 7, 2023 14:52

aprokop mentioned this pull request Dec 10, 2023

Cut down on the number of AccessTraits<Predicates, PredicatesTag> #978

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Cut down on the number of AccessTraits #967

Cut down on the number of AccessTraits #967

aprokop commented Nov 1, 2023 •

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aprokop commented Nov 4, 2023

masterleinad Nov 2, 2023

aprokop Nov 6, 2023

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aprokop commented Dec 7, 2023 •

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dalg24 Nov 2, 2023

dalg24 Nov 2, 2023

aprokop Dec 7, 2023

		ArborX::Details::PairIndexVolume<Point>>
		bvh(exec_space, ArborX::Details::LegacyValues<Points, Point>{points});

Cut down on the number of AccessTraits #967

Cut down on the number of AccessTraits #967

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