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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "net/quic/congestion_control/fix_rate_sender.h" | |
| 6 | |
| 7 #include <math.h> | |
| 8 | |
| 9 #include <algorithm> | |
| 10 | |
| 11 #include "base/logging.h" | |
| 12 #include "net/quic/congestion_control/rtt_stats.h" | |
| 13 #include "net/quic/quic_protocol.h" | |
| 14 | |
| 15 using std::max; | |
| 16 | |
| 17 namespace { | |
| 18 const int kInitialBitrate = 100000; // In bytes per second. | |
| 19 const uint64 kWindowSizeUs = 10000; // 10 ms. | |
| 20 } | |
| 21 | |
| 22 namespace net { | |
| 23 | |
| 24 FixRateSender::FixRateSender(const RttStats* rtt_stats) | |
| 25 : rtt_stats_(rtt_stats), | |
| 26 bitrate_(QuicBandwidth::FromBytesPerSecond(kInitialBitrate)), | |
| 27 max_segment_size_(kDefaultMaxPacketSize), | |
| 28 fix_rate_leaky_bucket_(bitrate_), | |
| 29 latest_rtt_(QuicTime::Delta::Zero()) { | |
| 30 DVLOG(1) << "FixRateSender"; | |
| 31 } | |
| 32 | |
| 33 FixRateSender::~FixRateSender() { | |
| 34 } | |
| 35 | |
| 36 void FixRateSender::SetFromConfig(const QuicConfig& config, bool is_server) { | |
| 37 } | |
| 38 | |
| 39 void FixRateSender::OnIncomingQuicCongestionFeedbackFrame( | |
| 40 const QuicCongestionFeedbackFrame& feedback, | |
| 41 QuicTime feedback_receive_time) { | |
| 42 LOG_IF(DFATAL, feedback.type != kFixRate) << | |
| 43 "Invalid incoming CongestionFeedbackType:" << feedback.type; | |
| 44 if (feedback.type == kFixRate) { | |
| 45 bitrate_ = feedback.fix_rate.bitrate; | |
| 46 fix_rate_leaky_bucket_.SetDrainingRate(feedback_receive_time, bitrate_); | |
| 47 } | |
| 48 // Silently ignore invalid messages in release mode. | |
| 49 } | |
| 50 | |
| 51 void FixRateSender::OnCongestionEvent(bool rtt_updated, | |
| 52 QuicByteCount bytes_in_flight, | |
| 53 const CongestionMap& acked_packets, | |
| 54 const CongestionMap& lost_packets) { | |
| 55 } | |
| 56 | |
| 57 bool FixRateSender::OnPacketSent( | |
| 58 QuicTime sent_time, | |
| 59 QuicByteCount /*bytes_in_flight*/, | |
| 60 QuicPacketSequenceNumber /*sequence_number*/, | |
| 61 QuicByteCount bytes, | |
| 62 HasRetransmittableData /*has_retransmittable_data*/) { | |
| 63 fix_rate_leaky_bucket_.Add(sent_time, bytes); | |
| 64 | |
| 65 return true; | |
| 66 } | |
| 67 | |
| 68 void FixRateSender::OnRetransmissionTimeout(bool packets_retransmitted) {} | |
| 69 | |
| 70 void FixRateSender::RevertRetransmissionTimeout() {} | |
| 71 | |
| 72 QuicTime::Delta FixRateSender::TimeUntilSend( | |
| 73 QuicTime now, | |
| 74 QuicByteCount /*bytes_in_flight*/, | |
| 75 HasRetransmittableData /*has_retransmittable_data*/) const { | |
| 76 return fix_rate_leaky_bucket_.TimeRemaining(now); | |
| 77 } | |
| 78 | |
| 79 QuicByteCount FixRateSender::CongestionWindow() const { | |
| 80 QuicByteCount window_size_bytes = bitrate_.ToBytesPerPeriod( | |
| 81 QuicTime::Delta::FromMicroseconds(kWindowSizeUs)); | |
| 82 // Make sure window size is not less than a packet. | |
| 83 return max(kDefaultMaxPacketSize, window_size_bytes); | |
| 84 } | |
| 85 | |
| 86 QuicBandwidth FixRateSender::BandwidthEstimate() const { | |
| 87 return bitrate_; | |
| 88 } | |
| 89 | |
| 90 bool FixRateSender::HasReliableBandwidthEstimate() const { | |
| 91 return true; | |
| 92 } | |
| 93 | |
| 94 QuicTime::Delta FixRateSender::RetransmissionDelay() const { | |
| 95 // TODO(pwestin): Calculate and return retransmission delay. | |
| 96 // Use 2 * the latest RTT for now. | |
| 97 return latest_rtt_.Add(latest_rtt_); | |
| 98 } | |
| 99 | |
| 100 QuicByteCount FixRateSender::GetCongestionWindow() const { | |
| 101 return 0; | |
| 102 } | |
| 103 | |
| 104 bool FixRateSender::InSlowStart() const { | |
| 105 return false; | |
| 106 } | |
| 107 | |
| 108 QuicByteCount FixRateSender::GetSlowStartThreshold() const { | |
| 109 return 0; | |
| 110 } | |
| 111 | |
| 112 CongestionControlType FixRateSender::GetCongestionControlType() const { | |
| 113 return kFixRateCongestionControl; | |
| 114 } | |
| 115 | |
| 116 } // namespace net | |
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Chromium Code Reviews
Issue 424903002:
Remove FixRate congestion frame type. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@remove_quic_version_15_71718286