487 lines
13 KiB
C++
487 lines
13 KiB
C++
/*
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Copyright (c) 2008, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "test.hpp"
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#include "libtorrent/bandwidth_manager.hpp"
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#include "libtorrent/bandwidth_queue_entry.hpp"
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#include "libtorrent/bandwidth_limit.hpp"
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#include "libtorrent/bandwidth_socket.hpp"
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#include "libtorrent/socket.hpp"
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#include "libtorrent/stat.hpp"
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#include "libtorrent/time.hpp"
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#include <boost/function.hpp>
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#include <boost/bind.hpp>
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#include <iostream>
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#include <math.h>
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struct torrent;
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struct peer_connection;
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using namespace libtorrent;
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const float sample_time = 20.f; // seconds
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//#define VERBOSE_LOGGING
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bandwidth_channel global_bwc;
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struct peer_connection: bandwidth_socket
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{
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peer_connection(bandwidth_manager& bwm
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, bandwidth_channel& torrent_bwc, int prio, bool ignore_limits, std::string name)
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: m_bwm(bwm)
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, m_torrent_bandwidth_channel(torrent_bwc)
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, m_priority(prio)
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, m_ignore_limits(ignore_limits)
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, m_name(name)
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, m_quota(0)
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{}
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bool is_disconnecting() const { return false; }
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bool ignore_bandwidth_limits() { return m_ignore_limits; }
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void assign_bandwidth(int channel, int amount);
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void throttle(int limit) { m_bandwidth_channel.throttle(limit); }
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void start();
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bandwidth_manager& m_bwm;
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bandwidth_channel m_bandwidth_channel;
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bandwidth_channel& m_torrent_bandwidth_channel;
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int m_priority;
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bool m_ignore_limits;
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std::string m_name;
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int m_quota;
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};
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void peer_connection::assign_bandwidth(int channel, int amount)
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{
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m_quota += amount;
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#ifdef VERBOSE_LOGGING
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std::cerr << " [" << m_name
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<< "] assign bandwidth, " << amount << std::endl;
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#endif
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TEST_CHECK(amount > 0);
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start();
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}
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void peer_connection::start()
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{
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m_bwm.request_bandwidth(self(), 150000, m_priority
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, &m_bandwidth_channel
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, &m_torrent_bandwidth_channel
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, &global_bwc);
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}
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typedef std::vector<boost::intrusive_ptr<peer_connection> > connections_t;
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void do_change_rate(bandwidth_channel& t1, bandwidth_channel& t2, int limit)
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{
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static int counter = 10;
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--counter;
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if (counter == 0)
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{
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t1.throttle(limit);
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t2.throttle(limit);
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return;
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}
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t1.throttle(limit + limit / 2 * ((counter & 1)?-1:1));
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t2.throttle(limit + limit / 2 * ((counter & 1)?1:-1));
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}
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void do_change_peer_rate(connections_t& v, int limit)
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{
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static int count = 10;
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--count;
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if (count == 0)
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{
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std::for_each(v.begin(), v.end()
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, boost::bind(&peer_connection::throttle, _1, limit));
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return;
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}
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int c = count;
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for (connections_t::iterator i = v.begin(); i != v.end(); ++i, ++c)
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i->get()->throttle(limit + limit / 2 * ((c & 1)?-1:1));
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}
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void nop() {}
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void run_test(connections_t& v
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, bandwidth_manager& manager
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, boost::function<void()> f = &nop)
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{
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std::cerr << "-------------" << std::endl;
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std::for_each(v.begin(), v.end()
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, boost::bind(&peer_connection::start, _1));
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for (int i = 0; i < int(sample_time * 10); ++i)
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{
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manager.update_quotas(milliseconds(100));
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if ((i % 15) == 0) f();
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}
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}
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bool close_to(float val, float comp, float err)
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{
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return fabs(val - comp) <= err;
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}
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void spawn_connections(connections_t& v, bandwidth_manager& bwm
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, bandwidth_channel& bwc, int num, char const* prefix)
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{
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for (int i = 0; i < num; ++i)
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{
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char name[200];
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snprintf(name, sizeof(name), "%s%d", prefix, i);
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v.push_back(new peer_connection(bwm, bwc, 200, false, name));
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}
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}
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void test_equal_connections(int num, int limit)
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{
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std::cerr << "\ntest equal connections " << num << " " << limit << std::endl;
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bandwidth_manager manager(0);
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global_bwc.throttle(limit);
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bandwidth_channel t1;
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connections_t v;
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spawn_connections(v, manager, t1, num, "p");
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run_test(v, manager);
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float sum = 0.f;
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float err = (std::max)(limit / num * 0.3f, 1000.f);
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for (connections_t::iterator i = v.begin()
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, end(v.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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std::cerr << (*i)->m_quota / sample_time
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<< " target: " << (limit / num) << " eps: " << err << std::endl;
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TEST_CHECK(close_to((*i)->m_quota / sample_time, limit / num, err));
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}
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sum /= sample_time;
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std::cerr << "sum: " << sum << " target: " << limit << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit, 50));
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}
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void test_connections_variable_rate(int num, int limit, int torrent_limit)
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{
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std::cerr << "\ntest connections variable rate" << num
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<< " l: " << limit
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<< " t: " << torrent_limit
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<< std::endl;
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bandwidth_manager manager(0);
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global_bwc.throttle(0);
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bandwidth_channel t1;
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if (torrent_limit)
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t1.throttle(torrent_limit);
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connections_t v;
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spawn_connections(v, manager, t1, num, "p");
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std::for_each(v.begin(), v.end()
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, boost::bind(&peer_connection::throttle, _1, limit));
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run_test(v, manager, boost::bind(&do_change_peer_rate
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, boost::ref(v), limit));
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if (torrent_limit > 0 && limit * num > torrent_limit)
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limit = torrent_limit / num;
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float sum = 0.f;
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float err = limit * 0.3f;
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for (connections_t::iterator i = v.begin()
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, end(v.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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std::cerr << (*i)->m_quota / sample_time
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<< " target: " << limit << " eps: " << err << std::endl;
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TEST_CHECK(close_to((*i)->m_quota / sample_time, limit, err));
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}
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sum /= sample_time;
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std::cerr << "sum: " << sum << " target: " << (limit * num) << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit * num, limit * 0.3f * num));
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}
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void test_single_peer(int limit, bool torrent_limit)
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{
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std::cerr << "\ntest single peer " << limit << " " << torrent_limit << std::endl;
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bandwidth_manager manager(0);
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bandwidth_channel t1;
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global_bwc.throttle(0);
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if (torrent_limit)
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t1.throttle(limit);
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else
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global_bwc.throttle(limit);
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connections_t v;
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spawn_connections(v, manager, t1, 1, "p");
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run_test(v, manager);
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float sum = 0.f;
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for (connections_t::iterator i = v.begin()
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, end(v.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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}
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sum /= sample_time;
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std::cerr << sum << " target: " << limit << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit, 1000));
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}
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void test_torrents(int num, int limit1, int limit2, int global_limit)
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{
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std::cerr << "\ntest equal torrents " << num
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<< " l1: " << limit1
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<< " l2: " << limit2
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<< " g: " << global_limit << std::endl;
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bandwidth_manager manager(0);
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global_bwc.throttle(global_limit);
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bandwidth_channel t1;
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bandwidth_channel t2;
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t1.throttle(limit1);
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t2.throttle(limit2);
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connections_t v1;
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spawn_connections(v1, manager, t1, num, "t1p");
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connections_t v2;
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spawn_connections(v2, manager, t2, num, "t2p");
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connections_t v;
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std::copy(v1.begin(), v1.end(), std::back_inserter(v));
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std::copy(v2.begin(), v2.end(), std::back_inserter(v));
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run_test(v, manager);
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if (global_limit > 0 && global_limit < limit1 + limit2)
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{
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limit1 = (std::min)(limit1, global_limit / 2);
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limit2 = global_limit - limit1;
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}
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float sum = 0.f;
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for (connections_t::iterator i = v1.begin()
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, end(v1.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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}
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sum /= sample_time;
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std::cerr << sum << " target: " << limit1 << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit1, 1000));
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sum = 0.f;
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for (connections_t::iterator i = v2.begin()
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, end(v2.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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}
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sum /= sample_time;
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std::cerr << sum << " target: " << limit2 << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit2, 1000));
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}
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void test_torrents_variable_rate(int num, int limit, int global_limit)
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{
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std::cerr << "\ntest torrents variable rate" << num
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<< " l: " << limit
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<< " g: " << global_limit << std::endl;
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bandwidth_manager manager(0);
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global_bwc.throttle(global_limit);
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bandwidth_channel t1;
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bandwidth_channel t2;
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t1.throttle(limit);
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t2.throttle(limit);
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connections_t v1;
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spawn_connections(v1, manager, t1, num, "t1p");
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connections_t v2;
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spawn_connections(v2, manager, t2, num, "t2p");
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connections_t v;
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std::copy(v1.begin(), v1.end(), std::back_inserter(v));
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std::copy(v2.begin(), v2.end(), std::back_inserter(v));
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run_test(v, manager, boost::bind(&do_change_rate, boost::ref(t1), boost::ref(t2), limit));
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if (global_limit > 0 && global_limit < 2 * limit)
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limit = global_limit / 2;
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float sum = 0.f;
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for (connections_t::iterator i = v1.begin()
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, end(v1.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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}
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sum /= sample_time;
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std::cerr << sum << " target: " << limit << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit, 1000));
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sum = 0.f;
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for (connections_t::iterator i = v2.begin()
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, end(v2.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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}
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sum /= sample_time;
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std::cerr << sum << " target: " << limit << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit, 1000));
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}
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void test_peer_priority(int limit, bool torrent_limit)
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{
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std::cerr << "\ntest peer priority " << limit << " " << torrent_limit << std::endl;
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bandwidth_manager manager(0);
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bandwidth_channel t1;
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global_bwc.throttle(0);
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if (torrent_limit)
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t1.throttle(limit);
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else
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global_bwc.throttle(limit);
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connections_t v1;
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spawn_connections(v1, manager, t1, 10, "p");
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connections_t v;
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std::copy(v1.begin(), v1.end(), std::back_inserter(v));
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boost::intrusive_ptr<peer_connection> p(
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new peer_connection(manager, t1, 1, false, "no-priority"));
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v.push_back(p);
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run_test(v, manager);
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float sum = 0.f;
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for (connections_t::iterator i = v1.begin()
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, end(v1.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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}
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sum /= sample_time;
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std::cerr << sum << " target: " << limit << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit, 50));
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std::cerr << "non-prioritized rate: " << p->m_quota / sample_time
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<< " target: " << (limit / 200 / 10) << std::endl;
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TEST_CHECK(close_to(p->m_quota / sample_time, limit / 200 / 10, 5));
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}
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void test_no_starvation(int limit)
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{
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std::cerr << "\ntest no starvation " << limit << std::endl;
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bandwidth_manager manager(0);
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bandwidth_channel t1;
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bandwidth_channel t2;
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global_bwc.throttle(limit);
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const int num_peers = 20;
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connections_t v1;
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spawn_connections(v1, manager, t1, num_peers, "p");
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connections_t v;
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std::copy(v1.begin(), v1.end(), std::back_inserter(v));
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boost::intrusive_ptr<peer_connection> p(
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new peer_connection(manager, t2, 1, false, "no-priority"));
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v.push_back(p);
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run_test(v, manager);
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float sum = 0.f;
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for (connections_t::iterator i = v.begin()
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, end(v.end()); i != end; ++i)
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{
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sum += (*i)->m_quota;
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}
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sum /= sample_time;
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std::cerr << sum << " target: " << limit << std::endl;
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TEST_CHECK(sum > 0);
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TEST_CHECK(close_to(sum, limit, 50));
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std::cerr << "non-prioritized rate: " << p->m_quota / sample_time
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<< " target: " << (limit / 200 / num_peers) << std::endl;
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TEST_CHECK(close_to(p->m_quota / sample_time, limit / 200 / num_peers, 5));
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}
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int test_main()
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{
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using namespace libtorrent;
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test_equal_connections(2, 20);
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test_equal_connections(2, 2000);
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test_equal_connections(2, 20000);
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test_equal_connections(3, 20000);
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test_equal_connections(5, 20000);
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test_equal_connections(7, 20000);
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test_equal_connections(33, 60000);
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test_equal_connections(33, 500000);
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test_connections_variable_rate(2, 20, 0);
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test_connections_variable_rate(5, 20000, 0);
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test_connections_variable_rate(3, 2000, 6000);
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test_connections_variable_rate(5, 2000, 30000);
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test_connections_variable_rate(33, 500000, 0);
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test_torrents(2, 400, 400, 0);
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test_torrents(2, 100, 500, 0);
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test_torrents(2, 3000, 3000, 6000);
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test_torrents(1, 40000, 40000, 0);
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test_torrents(24, 50000, 50000, 0);
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test_torrents(5, 6000, 6000, 3000);
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test_torrents(5, 6000, 5000, 4000);
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test_torrents(5, 20000, 20000, 30000);
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test_torrents_variable_rate(5, 6000, 3000);
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test_torrents_variable_rate(5, 20000, 30000);
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test_single_peer(40000, true);
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test_single_peer(40000, false);
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test_peer_priority(40000, false);
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test_peer_priority(40000, true);
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test_no_starvation(40000);
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return 0;
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}
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