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RTT

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orignal 2015-02-03 13:46:44 -05:00
parent c5a3832eae
commit 4a6847da8d
3 changed files with 25 additions and 12 deletions

27
Streaming.cpp
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@ -15,10 +15,9 @@ namespace stream
std::shared_ptr<const i2p::data::LeaseSet> remote, int port): m_Service (service), m_SendStreamID (0),
m_SequenceNumber (0), m_LastReceivedSequenceNumber (-1), m_IsOpen (false),
m_IsReset (false), m_IsAckSendScheduled (false), m_LocalDestination (local),
m_RemoteLeaseSet (remote), m_ReceiveTimer (m_Service),
m_ResendTimer (m_Service), m_AckSendTimer (m_Service),
m_NumSentBytes (0), m_NumReceivedBytes (0), m_Port (port),
m_WindowSize (MIN_WINDOW_SIZE), m_LastWindowSizeIncreaseTime (0)
m_RemoteLeaseSet (remote), m_ReceiveTimer (m_Service), m_ResendTimer (m_Service),
m_AckSendTimer (m_Service), m_NumSentBytes (0), m_NumReceivedBytes (0), m_Port (port),
m_WindowSize (MIN_WINDOW_SIZE), m_RTT (INITIAL_RTT), m_LastWindowSizeIncreaseTime (0)
{
m_RecvStreamID = i2p::context.GetRandomNumberGenerator ().GenerateWord32 ();
UpdateCurrentRemoteLease ();
@ -28,8 +27,8 @@ namespace stream
m_Service (service), m_SendStreamID (0), m_SequenceNumber (0), m_LastReceivedSequenceNumber (-1),
m_IsOpen (false), m_IsReset (false), m_IsAckSendScheduled (false), m_LocalDestination (local),
m_ReceiveTimer (m_Service), m_ResendTimer (m_Service), m_AckSendTimer (m_Service),
m_NumSentBytes (0), m_NumReceivedBytes (0), m_Port (0),
m_WindowSize (MIN_WINDOW_SIZE), m_LastWindowSizeIncreaseTime (0)
m_NumSentBytes (0), m_NumReceivedBytes (0), m_Port (0), m_WindowSize (MIN_WINDOW_SIZE),
m_RTT (INITIAL_RTT), m_LastWindowSizeIncreaseTime (0)
{
m_RecvStreamID = i2p::context.GetRandomNumberGenerator ().GenerateWord32 ();
}
@ -211,6 +210,7 @@ namespace stream
void Stream::ProcessAck (Packet * packet)
{
bool acknowledged = false;
auto ts = i2p::util::GetMillisecondsSinceEpoch ();
uint32_t ackThrough = packet->GetAckThrough ();
int nackCount = packet->GetNACKCount ();
for (auto it = m_SentPackets.begin (); it != m_SentPackets.end ();)
@ -235,7 +235,9 @@ namespace stream
}
}
auto sentPacket = *it;
LogPrint (eLogDebug, "Packet ", seqn, " acknowledged");
uint64_t rtt = ts - sentPacket->sendTime;
m_RTT = (m_RTT*seqn + rtt)/(seqn + 1);
LogPrint (eLogDebug, "Packet ", seqn, " acknowledged rtt=", rtt);
m_SentPackets.erase (it++);
delete sentPacket;
acknowledged = true;
@ -244,8 +246,7 @@ namespace stream
else
{
// linear growth
auto ts = i2p::util::GetMillisecondsSinceEpoch ();
if (ts > m_LastWindowSizeIncreaseTime + INITIAL_RTT)
if (ts > m_LastWindowSizeIncreaseTime + m_RTT)
{
m_WindowSize++;
if (m_WindowSize > MAX_WINDOW_SIZE) m_WindowSize = MAX_WINDOW_SIZE;
@ -348,8 +349,12 @@ namespace stream
m_IsAckSendScheduled = false;
m_AckSendTimer.cancel ();
bool isEmpty = m_SentPackets.empty ();
auto ts = i2p::util::GetMillisecondsSinceEpoch ();
for (auto it: packets)
{
it->sendTime = ts;
m_SentPackets.insert (it);
}
SendPackets (packets);
if (isEmpty)
ScheduleResend ();
@ -560,6 +565,7 @@ namespace stream
{
if (ecode != boost::asio::error::operation_aborted)
{
auto ts = i2p::util::GetMillisecondsSinceEpoch ();
bool congesion = false, first = true;
std::vector<Packet *> packets;
for (auto it : m_SentPackets)
@ -569,7 +575,10 @@ namespace stream
congesion = true;
first = false;
if (it->numResendAttempts <= MAX_NUM_RESEND_ATTEMPTS)
{
it->sendTime = ts;
packets.push_back (it);
}
else
{
LogPrint (eLogWarning, "Packet ", it->GetSeqn (), " was not ACKed after ", MAX_NUM_RESEND_ATTEMPTS, " attempts. Terminate");