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Add GPU construction for 32-bit Roaring bitmaps from raw indices #839
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246777b
Prepare Roaring bitmap storage for construction
sleeepyjack fc82b7a
Add GPU construction for 32-bit Roaring bitmaps
sleeepyjack 9934995
Add Roaring bitmap build examples and benchmarks
sleeepyjack e0048a9
Merge remote-tracking branch 'upstream/dev' into roaring-bitmap-build
sleeepyjack e5ef1e3
Rename Roaring bitmap host-bulk examples
sleeepyjack 63ae4dd
Document Roaring bitmap build internals
sleeepyjack 9d7c930
Use from_serialized in Roaring example
sleeepyjack d4b9416
Address Roaring bitmap review feedback
sleeepyjack 2027216
Fix Roaring kernel linkage for Clang builds
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,171 @@ | ||
| /* | ||
| * SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved. | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
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| #include <benchmark_utils.hpp> | ||
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| #include <cuco/roaring_bitmap.cuh> | ||
| #include <cuco/utility/key_generator.cuh> | ||
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| #include <nvbench/nvbench.cuh> | ||
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| #include <cuda/std/cstdint> | ||
| #include <thrust/device_vector.h> | ||
| #include <thrust/reverse.h> | ||
| #include <thrust/sequence.h> | ||
| #include <thrust/sort.h> | ||
| #include <thrust/tabulate.h> | ||
|
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| using namespace cuco::benchmark; | ||
| using namespace cuco::utility; | ||
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| enum class build_mode { indices, sorted_indices, sorted_unique_indices }; | ||
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| template <build_mode Mode, class InputIt> | ||
| auto build_roaring_bitmap(InputIt first, InputIt last, cuda::stream_ref stream) | ||
| { | ||
| using bitmap_type = cuco::experimental::roaring_bitmap<cuda::std::uint32_t>; | ||
|
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| if constexpr (Mode == build_mode::indices) { | ||
| return bitmap_type::from_indices(first, last, {}, stream); | ||
| } else if constexpr (Mode == build_mode::sorted_indices) { | ||
| return bitmap_type::from_sorted_indices(first, last, {}, stream); | ||
| } else { | ||
| return bitmap_type::from_sorted_unique_indices(first, last, {}, stream); | ||
| } | ||
| } | ||
|
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| template <build_mode Mode, class Dist> | ||
| void roaring_bitmap_build(nvbench::state& state, nvbench::type_list<Dist>) | ||
| { | ||
| using index_type = cuda::std::uint32_t; | ||
|
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| auto const num_inputs = state.get_int64("NumInputs"); | ||
| thrust::device_vector<index_type> indices(num_inputs); | ||
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| [[maybe_unused]] key_generator generator{}; | ||
| if constexpr (Mode == build_mode::sorted_unique_indices) { | ||
| thrust::sequence(indices.begin(), indices.end()); | ||
| } else { | ||
| generator.generate(dist_from_state<Dist>(state), indices.begin(), indices.end()); | ||
| if constexpr (Mode == build_mode::sorted_indices) { | ||
| thrust::sort(indices.begin(), indices.end()); | ||
| } | ||
| } | ||
|
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| state.add_element_count(num_inputs); | ||
| state.add_global_memory_reads<index_type>(num_inputs, "InputSize"); | ||
|
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| state.exec(nvbench::exec_tag::sync | nvbench::exec_tag::timer, | ||
| [&](nvbench::launch& launch, auto& timer) { | ||
| timer.start(); | ||
| [[maybe_unused]] auto bitmap = build_roaring_bitmap<Mode>( | ||
| indices.begin(), indices.end(), cuda::stream_ref{launch.get_stream()}); | ||
| timer.stop(); | ||
| }); | ||
| } | ||
|
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||
| template <class Dist> | ||
| void roaring_bitmap_from_indices(nvbench::state& state, nvbench::type_list<Dist> types) | ||
| { | ||
| roaring_bitmap_build<build_mode::indices>(state, types); | ||
| } | ||
|
|
||
| template <class Dist> | ||
| void roaring_bitmap_from_sorted_indices(nvbench::state& state, nvbench::type_list<Dist> types) | ||
| { | ||
| roaring_bitmap_build<build_mode::sorted_indices>(state, types); | ||
| } | ||
|
|
||
| template <class Dist> | ||
| void roaring_bitmap_from_sorted_unique_indices(nvbench::state& state, | ||
| nvbench::type_list<Dist> types) | ||
| { | ||
| roaring_bitmap_build<build_mode::sorted_unique_indices>(state, types); | ||
| } | ||
|
|
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| template <build_mode Mode> | ||
| void roaring_bitmap_build_container_cardinality(nvbench::state& state) | ||
| { | ||
| using index_type = cuda::std::uint32_t; | ||
|
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| constexpr cuda::std::int64_t num_containers = 4096; | ||
| auto const cardinality = state.get_int64("ContainerCardinality"); | ||
| auto const num_inputs = num_containers * cardinality; | ||
| thrust::device_vector<index_type> indices(num_inputs); | ||
|
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| thrust::tabulate( | ||
| indices.begin(), indices.end(), [cardinality] __device__(cuda::std::int64_t index) { | ||
| auto const container = static_cast<index_type>(index / cardinality); | ||
| auto const lower = static_cast<index_type>(index % cardinality); | ||
| return (container << 16) | lower; | ||
| }); | ||
| if constexpr (Mode == build_mode::indices) { thrust::reverse(indices.begin(), indices.end()); } | ||
|
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| state.add_element_count(num_inputs); | ||
| state.add_global_memory_reads<index_type>(num_inputs, "InputSize"); | ||
|
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| state.exec(nvbench::exec_tag::sync | nvbench::exec_tag::timer, | ||
| [&](nvbench::launch& launch, auto& timer) { | ||
| timer.start(); | ||
| [[maybe_unused]] auto bitmap = build_roaring_bitmap<Mode>( | ||
| indices.begin(), indices.end(), cuda::stream_ref{launch.get_stream()}); | ||
| timer.stop(); | ||
| }); | ||
| } | ||
|
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||
| void roaring_bitmap_from_indices_container_cardinality(nvbench::state& state) | ||
| { | ||
| roaring_bitmap_build_container_cardinality<build_mode::indices>(state); | ||
| } | ||
|
|
||
| void roaring_bitmap_from_sorted_indices_container_cardinality(nvbench::state& state) | ||
| { | ||
| roaring_bitmap_build_container_cardinality<build_mode::sorted_indices>(state); | ||
| } | ||
|
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| void roaring_bitmap_from_sorted_unique_indices_container_cardinality(nvbench::state& state) | ||
| { | ||
| roaring_bitmap_build_container_cardinality<build_mode::sorted_unique_indices>(state); | ||
| } | ||
|
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||
| NVBENCH_BENCH_TYPES(roaring_bitmap_from_indices, | ||
| NVBENCH_TYPE_AXES(nvbench::type_list<distribution::unique>)) | ||
| .set_name("roaring_bitmap_from_indices_unique") | ||
| .set_type_axes_names({"Distribution"}) | ||
| .add_int64_power_of_two_axis("NumInputs", {20, 24, 28}) | ||
| .add_int64_axis("Multiplicity", {1}); | ||
|
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| NVBENCH_BENCH(roaring_bitmap_from_indices_container_cardinality) | ||
| .set_name("roaring_bitmap_from_indices_container_cardinality") | ||
| .add_int64_axis("ContainerCardinality", {1, 8, 64, 512, 4096, 8192, 32768}); | ||
|
|
||
| NVBENCH_BENCH(roaring_bitmap_from_sorted_indices_container_cardinality) | ||
| .set_name("roaring_bitmap_from_sorted_indices_container_cardinality") | ||
| .add_int64_axis("ContainerCardinality", {1, 8, 64, 512, 4096, 8192, 32768}); | ||
|
|
||
| NVBENCH_BENCH(roaring_bitmap_from_sorted_unique_indices_container_cardinality) | ||
| .set_name("roaring_bitmap_from_sorted_unique_indices_container_cardinality") | ||
| .add_int64_axis("ContainerCardinality", {1, 8, 64, 512, 4096, 8192, 32768}); | ||
|
|
||
| NVBENCH_BENCH_TYPES(roaring_bitmap_from_indices, | ||
| NVBENCH_TYPE_AXES(nvbench::type_list<distribution::uniform>)) | ||
| .set_name("roaring_bitmap_from_indices_uniform") | ||
| .set_type_axes_names({"Distribution"}) | ||
| .add_int64_power_of_two_axis("NumInputs", {20, 24, 28}) | ||
| .add_int64_axis("Multiplicity", {2, 8, 32}); | ||
|
|
||
| NVBENCH_BENCH_TYPES(roaring_bitmap_from_sorted_indices, | ||
| NVBENCH_TYPE_AXES(nvbench::type_list<distribution::uniform>)) | ||
| .set_name("roaring_bitmap_from_sorted_indices") | ||
| .set_type_axes_names({"Distribution"}) | ||
| .add_int64_power_of_two_axis("NumInputs", {20, 24, 28}) | ||
| .add_int64_axis("Multiplicity", {2, 8, 32}); | ||
|
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| NVBENCH_BENCH_TYPES(roaring_bitmap_from_sorted_unique_indices, | ||
| NVBENCH_TYPE_AXES(nvbench::type_list<distribution::unique>)) | ||
| .set_name("roaring_bitmap_from_sorted_unique_indices") | ||
| .set_type_axes_names({"Distribution"}) | ||
| .add_int64_power_of_two_axis("NumInputs", {20, 24, 28}) | ||
| .add_int64_axis("Multiplicity", {1}); | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| /* | ||
| * SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved. | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| #include <cuco/roaring_bitmap.cuh> | ||
|
|
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| #include <cuda/std/cstdint> | ||
| #include <thrust/device_vector.h> | ||
| #include <thrust/host_vector.h> | ||
|
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| #include <iostream> | ||
|
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| /** | ||
| * @file host_bulk_from_indices_example.cu | ||
| * @brief Demonstrates building a roaring_bitmap from unordered indices. | ||
| */ | ||
| int main() | ||
| { | ||
| using index_type = cuda::std::uint32_t; | ||
|
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| thrust::device_vector<index_type> indices{0x00010002, 7, 1, 0x00010000, 7, 3, 0x00010002}; | ||
|
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| auto bitmap = | ||
| cuco::experimental::roaring_bitmap<index_type>::from_indices(indices.begin(), indices.end()); | ||
|
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| thrust::device_vector<index_type> queries{1, 2, 3, 7, 0x00010000, 0x00010001, 0x00010002}; | ||
| thrust::device_vector<bool> results(queries.size()); | ||
| bitmap.contains(queries.begin(), queries.end(), results.begin()); | ||
|
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| thrust::host_vector<bool> expected{true, false, true, true, true, false, true}; | ||
| thrust::host_vector<bool> actual = results; | ||
| bool const success = actual == expected; | ||
|
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| std::cout << "unique indices: " << bitmap.size() << '\n'; | ||
| std::cout << "serialized bytes: " << bitmap.size_bytes() << '\n'; | ||
| std::cout << "success: " << std::boolalpha << success << '\n'; | ||
|
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||
| return success ? 0 : 1; | ||
| } |
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