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optimized swarm startup time (shaved off about 1-2 seconds) by introducing torrent connection boost on the first tracker response for a torrent

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This commit is contained in:
Arvid Norberg
2010-12-17 03:10:56 +00:00
parent 8846fe4b93
commit d554cf88e6
7 changed files with 71 additions and 2 deletions
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23
src/session_impl.cpp
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@@ -499,6 +499,7 @@ namespace aux {
, m_half_open)
, m_utp_socket_manager(m_settings, m_udp_socket
, boost::bind(&session_impl::incoming_connection, this, _1))
, m_boost_connections(0)
, m_timer(m_io_service)
, m_lsd_announce_timer(m_io_service)
, m_host_resolver(m_io_service)
@@ -2603,15 +2604,33 @@ namespace aux {
// equally likely to connect to a peer
int free_slots = m_half_open.free_slots();
int max_connections = m_settings.connection_speed;
// boost connections are connections made by torrent connection
// boost, which are done immediately on a tracker response. These
// connections needs to be deducted from this second
if (m_boost_connections > 0)
{
if (m_boost_connections > max_connections)
{
m_boost_connections -= max_connections;
max_connections = 0;
}
else
{
max_connections -= m_boost_connections;
m_boost_connections = 0;
}
}
if (!m_torrents.empty()
&& free_slots > -m_half_open.limit()
&& num_connections() < m_settings.connections_limit
&& !m_abort
&& m_settings.connection_speed > 0)
&& m_settings.connection_speed > 0
&& max_connections > 0)
{
// this is the maximum number of connections we will
// attempt this tick
int max_connections = m_settings.connection_speed;
int average_peers = 0;
if (num_downloads > 0)
average_peers = num_downloads_peers / num_downloads;