libs/fiber/performance/fiber/scale_join.cpp
// Copyright Oliver Kowalke 2009.
// 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)
#include <cstdlib>
#include <iostream>
#include <stdexcept>
#include <boost/cstdint.hpp>
#include <boost/fiber/all.hpp>
#include <boost/preprocessor.hpp>
#include "../clock.hpp"
#define CREATE(z, n, _) \
boost::fibers::fiber BOOST_PP_CAT(f,n) (worker);
#define JOIN(z, n, _) \
BOOST_PP_CAT(f,n) .join();
void worker() {}
duration_type measure10( duration_type overhead) {
boost::fibers::fiber( worker).join();
BOOST_PP_REPEAT_FROM_TO(1, 10, CREATE, _);
time_point_type start( clock_type::now() );
BOOST_PP_REPEAT_FROM_TO(1, 10, JOIN, _);
duration_type total = clock_type::now() - start;
total -= overhead_clock(); // overhead of measurement
total /= 10; // loops
return total;
}
duration_type measure50( duration_type overhead) {
boost::fibers::fiber( worker).join();
BOOST_PP_REPEAT_FROM_TO(1, 50, CREATE, _);
time_point_type start( clock_type::now() );
BOOST_PP_REPEAT_FROM_TO(1, 50, JOIN, _);
duration_type total = clock_type::now() - start;
total -= overhead_clock(); // overhead of measurement
total /= 50; // loops
return total;
}
duration_type measure100( duration_type overhead) {
boost::fibers::fiber( worker).join();
BOOST_PP_REPEAT_FROM_TO(1, 100, CREATE, _);
time_point_type start( clock_type::now() );
BOOST_PP_REPEAT_FROM_TO(1, 100, JOIN, _);
duration_type total = clock_type::now() - start;
total -= overhead_clock(); // overhead of measurement
total /= 100; // loops
return total;
}
duration_type measure500( duration_type overhead) {
boost::fibers::fiber( worker).join();
#include "fiber_create_500.ipp"
time_point_type start( clock_type::now() );
#include "fiber_join_500.ipp"
duration_type total = clock_type::now() - start;
total -= overhead_clock(); // overhead of measurement
total /= 500; // loops
return total;
}
duration_type measure1000( duration_type overhead) {
boost::fibers::fiber( worker).join();
#include "fiber_create_1000.ipp"
time_point_type start( clock_type::now() );
#include "fiber_join_1000.ipp"
duration_type total = clock_type::now() - start;
total -= overhead_clock(); // overhead of measurement
total /= 1000; // loops
return total;
}
duration_type measure5000( duration_type overhead) {
boost::fibers::fiber( worker).join();
#include "fiber_create_5000.ipp"
time_point_type start( clock_type::now() );
#include "fiber_join_5000.ipp"
duration_type total = clock_type::now() - start;
total -= overhead_clock(); // overhead of measurement
total /= 5000; // loops
return total;
}
duration_type measure10000( duration_type overhead) {
boost::fibers::fiber( worker).join();
#include "fiber_create_10000.ipp"
time_point_type start( clock_type::now() );
#include "fiber_join_10000.ipp"
duration_type total = clock_type::now() - start;
total -= overhead_clock(); // overhead of measurement
total /= 10000; // loops
return total;
}
int main( int argc, char * argv[]) {
try {
duration_type overhead = overhead_clock();
boost::uint64_t res = measure10( overhead).count();
std::cout << "10 jobs: average of " << res << " nano seconds" << std::endl;
res = measure50( overhead).count();
std::cout << "50 jobs: average of " << res << " nano seconds" << std::endl;
res = measure100( overhead).count();
std::cout << "100 jobs: average of " << res << " nano seconds" << std::endl;
res = measure500( overhead).count();
std::cout << "500 jobs: average of " << res << " nano seconds" << std::endl;
res = measure1000( overhead).count();
std::cout << "1000 jobs: average of " << res << " nano seconds" << std::endl;
res = measure5000( overhead).count();
std::cout << "5000 jobs: average of " << res << " nano seconds" << std::endl;
res = measure10000( overhead).count();
std::cout << "10000 jobs: average of " << res << " nano seconds" << 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;
}