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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "net/quic/congestion_control/fix_rate_sender.h" | 5 #include "net/quic/congestion_control/fix_rate_sender.h" |
6 | 6 |
7 #include <math.h> | 7 #include <math.h> |
8 | 8 |
9 #include <algorithm> | 9 #include <algorithm> |
10 | 10 |
11 #include "base/logging.h" | 11 #include "base/logging.h" |
12 #include "net/quic/congestion_control/rtt_stats.h" | 12 #include "net/quic/congestion_control/rtt_stats.h" |
13 #include "net/quic/quic_protocol.h" | 13 #include "net/quic/quic_protocol.h" |
14 | 14 |
15 using std::max; | 15 using std::max; |
16 | 16 |
17 namespace { | 17 namespace { |
18 const int kInitialBitrate = 100000; // In bytes per second. | 18 const int kInitialBitrate = 100000; // In bytes per second. |
19 const uint64 kWindowSizeUs = 10000; // 10 ms. | 19 const uint64 kWindowSizeUs = 10000; // 10 ms. |
20 } | 20 } |
21 | 21 |
22 namespace net { | 22 namespace net { |
23 | 23 |
24 FixRateSender::FixRateSender(const RttStats* rtt_stats) | 24 FixRateSender::FixRateSender(const RttStats* rtt_stats) |
25 : rtt_stats_(rtt_stats), | 25 : rtt_stats_(rtt_stats), |
26 bitrate_(QuicBandwidth::FromBytesPerSecond(kInitialBitrate)), | 26 bitrate_(QuicBandwidth::FromBytesPerSecond(kInitialBitrate)), |
27 max_segment_size_(kDefaultMaxPacketSize), | 27 max_segment_size_(kDefaultMaxPacketSize), |
28 fix_rate_leaky_bucket_(bitrate_), | 28 fix_rate_leaky_bucket_(bitrate_), |
29 paced_sender_(bitrate_, max_segment_size_), | 29 paced_sender_(bitrate_, max_segment_size_), |
30 data_in_flight_(0), | 30 data_in_flight_(0), |
31 latest_rtt_(QuicTime::Delta::Zero()) { | 31 latest_rtt_(QuicTime::Delta::Zero()) { |
32 DVLOG(1) << "FixRateSender"; | 32 DVLOG(1) << "FixRateSender"; |
33 } | 33 } |
34 | 34 |
35 FixRateSender::~FixRateSender() { | 35 FixRateSender::~FixRateSender() { |
36 } | 36 } |
37 | 37 |
38 void FixRateSender::SetFromConfig(const QuicConfig& config, bool is_server) { | 38 void FixRateSender::SetFromConfig(const QuicConfig& config, bool is_server) { |
39 } | 39 } |
40 | 40 |
41 void FixRateSender::OnIncomingQuicCongestionFeedbackFrame( | 41 void FixRateSender::OnIncomingQuicCongestionFeedbackFrame( |
42 const QuicCongestionFeedbackFrame& feedback, | 42 const QuicCongestionFeedbackFrame& feedback, |
43 QuicTime feedback_receive_time) { | 43 QuicTime feedback_receive_time) { |
44 LOG_IF(DFATAL, feedback.type != kFixRate) << | 44 LOG_IF(DFATAL, feedback.type != kFixRate) |
45 "Invalid incoming CongestionFeedbackType:" << feedback.type; | 45 << "Invalid incoming CongestionFeedbackType:" << feedback.type; |
46 if (feedback.type == kFixRate) { | 46 if (feedback.type == kFixRate) { |
47 bitrate_ = feedback.fix_rate.bitrate; | 47 bitrate_ = feedback.fix_rate.bitrate; |
48 fix_rate_leaky_bucket_.SetDrainingRate(feedback_receive_time, bitrate_); | 48 fix_rate_leaky_bucket_.SetDrainingRate(feedback_receive_time, bitrate_); |
49 paced_sender_.UpdateBandwidthEstimate(feedback_receive_time, bitrate_); | 49 paced_sender_.UpdateBandwidthEstimate(feedback_receive_time, bitrate_); |
50 } | 50 } |
51 // Silently ignore invalid messages in release mode. | 51 // Silently ignore invalid messages in release mode. |
52 } | 52 } |
53 | 53 |
54 void FixRateSender::OnPacketAcked( | 54 void FixRateSender::OnPacketAcked( |
55 QuicPacketSequenceNumber /*acked_sequence_number*/, | 55 QuicPacketSequenceNumber /*acked_sequence_number*/, |
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68 QuicPacketSequenceNumber /*sequence_number*/, | 68 QuicPacketSequenceNumber /*sequence_number*/, |
69 QuicByteCount bytes, | 69 QuicByteCount bytes, |
70 HasRetransmittableData /*has_retransmittable_data*/) { | 70 HasRetransmittableData /*has_retransmittable_data*/) { |
71 fix_rate_leaky_bucket_.Add(sent_time, bytes); | 71 fix_rate_leaky_bucket_.Add(sent_time, bytes); |
72 paced_sender_.OnPacketSent(sent_time, bytes); | 72 paced_sender_.OnPacketSent(sent_time, bytes); |
73 data_in_flight_ += bytes; | 73 data_in_flight_ += bytes; |
74 | 74 |
75 return true; | 75 return true; |
76 } | 76 } |
77 | 77 |
78 void FixRateSender::OnRetransmissionTimeout(bool packets_retransmitted) { } | 78 void FixRateSender::OnRetransmissionTimeout(bool packets_retransmitted) { |
| 79 } |
79 | 80 |
80 void FixRateSender::OnPacketAbandoned( | 81 void FixRateSender::OnPacketAbandoned( |
81 QuicPacketSequenceNumber /*sequence_number*/, | 82 QuicPacketSequenceNumber /*sequence_number*/, |
82 QuicByteCount bytes_abandoned) { | 83 QuicByteCount bytes_abandoned) { |
83 DCHECK_GE(data_in_flight_, bytes_abandoned); | 84 DCHECK_GE(data_in_flight_, bytes_abandoned); |
84 data_in_flight_ -= bytes_abandoned; | 85 data_in_flight_ -= bytes_abandoned; |
85 } | 86 } |
86 | 87 |
87 QuicTime::Delta FixRateSender::TimeUntilSend( | 88 QuicTime::Delta FixRateSender::TimeUntilSend( |
88 QuicTime now, | 89 QuicTime now, |
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120 // TODO(pwestin): Calculate and return retransmission delay. | 121 // TODO(pwestin): Calculate and return retransmission delay. |
121 // Use 2 * the latest RTT for now. | 122 // Use 2 * the latest RTT for now. |
122 return latest_rtt_.Add(latest_rtt_); | 123 return latest_rtt_.Add(latest_rtt_); |
123 } | 124 } |
124 | 125 |
125 QuicByteCount FixRateSender::GetCongestionWindow() const { | 126 QuicByteCount FixRateSender::GetCongestionWindow() const { |
126 return 0; | 127 return 0; |
127 } | 128 } |
128 | 129 |
129 } // namespace net | 130 } // namespace net |
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