77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
|
|
// Copyright Oliver Kowalke 2015.
|
|
// 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)
|
|
|
|
// based on https://github.com/atemerev/skynet from Alexander Temerev
|
|
|
|
#include <algorithm>
|
|
#include <cassert>
|
|
#include <chrono>
|
|
#include <condition_variable>
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
#include <cstdlib>
|
|
#include <queue>
|
|
#include <future>
|
|
#include <iostream>
|
|
#include <memory>
|
|
#include <mutex>
|
|
#include <numeric>
|
|
#include <random>
|
|
#include <sstream>
|
|
#include <vector>
|
|
|
|
#include "buffered_channel.hpp"
|
|
|
|
using channel_type = buffered_channel< std::uint64_t >;
|
|
using clock_type = std::chrono::steady_clock;
|
|
using duration_type = clock_type::duration;
|
|
using time_point_type = clock_type::time_point;
|
|
|
|
// microbenchmark
|
|
std::uint64_t skynet( std::uint64_t num, std::uint64_t size, std::uint64_t div)
|
|
{
|
|
if ( size != 1){
|
|
size /= div;
|
|
|
|
std::vector<std::future<std::uint64_t> > results;
|
|
results.reserve( div);
|
|
|
|
for ( std::uint64_t i = 0; i != div; ++i) {
|
|
std::uint64_t sub_num = num + i * size;
|
|
results.emplace_back(
|
|
std::async( skynet, sub_num, size, div) );
|
|
}
|
|
|
|
std::uint64_t sum = 0;
|
|
for ( auto& f : results)
|
|
sum += f.get();
|
|
|
|
return sum;
|
|
}
|
|
|
|
return num;
|
|
}
|
|
|
|
int main() {
|
|
try {
|
|
std::size_t size{ 10000 };
|
|
std::size_t div{ 10 };
|
|
std::uint64_t result{ 0 };
|
|
duration_type duration{ duration_type::zero() };
|
|
time_point_type start{ clock_type::now() };
|
|
result = skynet( 0, size, div);
|
|
duration = clock_type::now() - start;
|
|
std::cout << "Result: " << result << " in " << duration.count() / 1000000 << " ms" << std::endl;
|
|
std::cout << "done." << std::endl;
|
|
return EXIT_SUCCESS;
|
|
} catch ( std::exception const& e) {
|
|
std::cerr << "exception: " << e.what() << std::endl;
|
|
} catch (...) {
|
|
std::cerr << "unhandled exception" << std::endl;
|
|
}
|
|
return EXIT_FAILURE;
|
|
}
|