51 lines
1.9 KiB
Plaintext
51 lines
1.9 KiB
Plaintext
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//===----------------------------------------------------------------------===//
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//
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// Part of libcu++, the C++ Standard Library for your entire system,
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// under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#include <thrust/device_vector.h>
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#include <thrust/partition.h>
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#include <thrust/sequence.h>
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#include <cuda/functional>
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#include <cuda/std/execution>
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#include <cuda/stream>
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#include "nvbench_helper.cuh"
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template <typename T>
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static void basic(nvbench::state& state, nvbench::type_list<T>)
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{
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using select_op_t = less_then_t<T>;
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// set up input
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const auto elements = static_cast<std::size_t>(state.get_int64("Elements"));
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const auto common_prefix = state.get_float64("MismatchAt");
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const auto mismatch_point = ::cuda::std::clamp<std::size_t>(
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static_cast<std::size_t>(static_cast<double>(elements) * common_prefix), std::size_t{0}, elements - 1);
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thrust::device_vector<T> dinput(elements, thrust::no_init);
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thrust::sequence(dinput.begin(), dinput.end(), T{0});
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state.add_global_memory_reads<T>(2 * elements);
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state.add_global_memory_writes<size_t>(1);
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caching_allocator_t alloc{};
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state.exec(
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nvbench::exec_tag::gpu | nvbench::exec_tag::no_batch | nvbench::exec_tag::sync, [&](nvbench::launch& launch) {
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do_not_optimize(cuda::std::is_partitioned(
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cuda_policy(alloc, launch), dinput.begin(), dinput.end(), select_op_t{static_cast<T>(mismatch_point)}));
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});
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}
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NVBENCH_BENCH_TYPES(basic, NVBENCH_TYPE_AXES(fundamental_types))
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.set_name("base")
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.add_int64_power_of_two_axis("Elements", nvbench::range(16, 28, 4))
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.add_float64_axis("MismatchAt", std::vector{1.0, 0.5, 0.01});
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