59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
#include <algorithm>
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#include <cassert>
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#include <chrono>
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#include <cstddef>
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#include <cstdint>
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#include <cstdlib>
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#include <iostream>
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#include <memory>
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#include <numeric>
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#include <thread>
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#include <vector>
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#include "buffered_channel.hpp"
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using channel_type = buffered_channel< std::uint64_t >;
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using clock_type = std::chrono::steady_clock;
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using duration_type = clock_type::duration;
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using time_point_type = clock_type::time_point;
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// microbenchmark
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void skynet( channel_type & c, std::size_t num, std::size_t size, std::size_t div) {
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if ( 1 == size) {
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c.push( num);
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} else {
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channel_type rc{ 16 };
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for ( std::size_t i = 0; i < div; ++i) {
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auto sub_num = num + i * size / div;
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std::thread{ skynet, std::ref( rc), sub_num, size / div, div }.detach();
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}
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std::uint64_t sum{ 0 };
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for ( std::size_t i = 0; i < div; ++i) {
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sum += rc.value_pop();
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}
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c.push( sum);
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}
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}
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int main() {
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try {
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std::size_t size{ 10000 };
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std::size_t div{ 10 };
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std::uint64_t result{ 0 };
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duration_type duration{ duration_type::zero() };
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channel_type rc{ 2 };
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time_point_type start{ clock_type::now() };
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skynet( rc, 0, size, div);
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result = rc.value_pop();
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duration = clock_type::now() - start;
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std::cout << "Result: " << result << " in " << duration.count() / 1000000 << " ms" << std::endl;
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std::cout << "done." << std::endl;
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return EXIT_SUCCESS;
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} catch ( std::exception const& e) {
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std::cerr << "exception: " << e.what() << std::endl;
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} catch (...) {
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std::cerr << "unhandled exception" << std::endl;
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}
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return EXIT_FAILURE;
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}
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