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Partially support data parallel for_loop
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libs/core/algorithms/tests/unit/datapar_algorithms/for_loop_datapar.cpp
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| // Copyright (c) 2016-2025 Hartmut Kaiser | ||
| // | ||
| // SPDX-License-Identifier: BSL-1.0 | ||
| // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
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| #include <hpx/algorithm.hpp> | ||
| #include <hpx/datapar.hpp> | ||
| #include <hpx/init.hpp> | ||
| #include <hpx/modules/testing.hpp> | ||
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| #include <algorithm> | ||
| #include <cstddef> | ||
| #include <iostream> | ||
| #include <numeric> | ||
| #include <random> | ||
| #include <string> | ||
| #include <utility> | ||
| #include <vector> | ||
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| /////////////////////////////////////////////////////////////////////////////// | ||
| unsigned int seed = std::random_device{}(); | ||
| std::mt19937 gen(seed); | ||
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| /////////////////////////////////////////////////////////////////////////////// | ||
| template <typename ExPolicy> | ||
| void test_for_loop_idx(ExPolicy&& policy) | ||
| { | ||
| static_assert(hpx::is_execution_policy_v<ExPolicy>, | ||
| "hpx::is_execution_policy_v<ExPolicy>"); | ||
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| std::vector<std::size_t> c(10007); | ||
| std::iota(std::begin(c), std::end(c), gen()); | ||
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| hpx::experimental::for_loop( | ||
| std::forward<ExPolicy>(policy), 0, int(c.size()), [&c](auto i) { | ||
| for (std::size_t e = 0; e < hpx::parallel::traits::size(i); ++e) | ||
| c[hpx::parallel::traits::get(i, e)] = 42; | ||
| }); | ||
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| // verify values | ||
| std::size_t count = 0; | ||
| std::for_each(std::begin(c), std::end(c), [&count](std::size_t v) -> void { | ||
| HPX_TEST_EQ(v, std::size_t(42)); | ||
| ++count; | ||
| }); | ||
| HPX_TEST_EQ(count, c.size()); | ||
| } | ||
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| template <typename ExPolicy> | ||
| void test_for_loop_idx_async(ExPolicy&& p) | ||
| { | ||
| std::vector<std::size_t> c(10007); | ||
| std::iota(std::begin(c), std::end(c), gen()); | ||
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| auto f = hpx::experimental::for_loop( | ||
| std::forward<ExPolicy>(p), 0, int(c.size()), [&c](auto i) { | ||
| for (std::size_t e = 0; e < hpx::parallel::traits::size(i); ++e) | ||
| c[hpx::parallel::traits::get(i, e)] = 42; | ||
| }); | ||
| f.wait(); | ||
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| // verify values | ||
| std::size_t count = 0; | ||
| std::for_each(std::begin(c), std::end(c), [&count](std::size_t v) -> void { | ||
| HPX_TEST_EQ(v, std::size_t(42)); | ||
| ++count; | ||
| }); | ||
| HPX_TEST_EQ(count, c.size()); | ||
| } | ||
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| void for_loop_test_idx() | ||
| { | ||
| using namespace hpx::execution; | ||
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| test_for_loop_idx(simd); | ||
| test_for_loop_idx(par_simd); | ||
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| test_for_loop_idx_async(simd(task)); | ||
| test_for_loop_idx_async(par_simd(task)); | ||
| } | ||
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| /////////////////////////////////////////////////////////////////////////////// | ||
| int hpx_main(hpx::program_options::variables_map& vm) | ||
| { | ||
| if (vm.count("seed")) | ||
| seed = vm["seed"].as<unsigned int>(); | ||
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| std::cout << "using seed: " << seed << std::endl; | ||
| gen.seed(seed); | ||
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| for_loop_test_idx(); | ||
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| return hpx::local::finalize(); | ||
| } | ||
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| int main(int argc, char* argv[]) | ||
| { | ||
| // add command line option which controls the random number generator seed | ||
| using namespace hpx::program_options; | ||
| options_description desc_commandline( | ||
| "Usage: " HPX_APPLICATION_STRING " [options]"); | ||
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| desc_commandline.add_options()("seed,s", value<unsigned int>(), | ||
| "the random number generator seed to use for this run"); | ||
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| // By default this test should run on all available cores | ||
| std::vector<std::string> const cfg = {"hpx.os_threads=all"}; | ||
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| // Initialize and run HPX | ||
| hpx::local::init_params init_args; | ||
| init_args.desc_cmdline = desc_commandline; | ||
| init_args.cfg = cfg; | ||
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| HPX_TEST_EQ_MSG(hpx::local::init(hpx_main, argc, argv, init_args), 0, | ||
| "HPX main exited with non-zero status"); | ||
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| return hpx::util::report_errors(); | ||
| } |
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