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Side by Side Diff: net/quic/congestion_control/tcp_cubic_sender.h

Issue 761903003: Update from https://crrev.com/306655 (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 6 years ago
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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 // TCP cubic send side congestion algorithm, emulates the behavior of 5 // TCP cubic send side congestion algorithm, emulates the behavior of
6 // TCP cubic. 6 // TCP cubic.
7 7
8 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ 8 #ifndef NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_
9 #define NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ 9 #define NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_
10 10
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37 bool reno, 37 bool reno,
38 QuicPacketCount initial_tcp_congestion_window, 38 QuicPacketCount initial_tcp_congestion_window,
39 QuicPacketCount max_tcp_congestion_window, 39 QuicPacketCount max_tcp_congestion_window,
40 QuicConnectionStats* stats); 40 QuicConnectionStats* stats);
41 ~TcpCubicSender() override; 41 ~TcpCubicSender() override;
42 42
43 // Start implementation of SendAlgorithmInterface. 43 // Start implementation of SendAlgorithmInterface.
44 void SetFromConfig(const QuicConfig& config, 44 void SetFromConfig(const QuicConfig& config,
45 bool is_server, 45 bool is_server,
46 bool using_pacing) override; 46 bool using_pacing) override;
47 void ResumeConnectionState( 47 bool ResumeConnectionState(
48 const CachedNetworkParameters& cached_network_params) override; 48 const CachedNetworkParameters& cached_network_params) override;
49 void SetNumEmulatedConnections(int num_connections) override; 49 void SetNumEmulatedConnections(int num_connections) override;
50 void OnCongestionEvent(bool rtt_updated, 50 void OnCongestionEvent(bool rtt_updated,
51 QuicByteCount bytes_in_flight, 51 QuicByteCount bytes_in_flight,
52 const CongestionVector& acked_packets, 52 const CongestionVector& acked_packets,
53 const CongestionVector& lost_packets) override; 53 const CongestionVector& lost_packets) override;
54 bool OnPacketSent(QuicTime sent_time, 54 bool OnPacketSent(QuicTime sent_time,
55 QuicByteCount bytes_in_flight, 55 QuicByteCount bytes_in_flight,
56 QuicPacketSequenceNumber sequence_number, 56 QuicPacketSequenceNumber sequence_number,
57 QuicByteCount bytes, 57 QuicByteCount bytes,
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111 // Track the largest packet that has been acked. 111 // Track the largest packet that has been acked.
112 QuicPacketSequenceNumber largest_acked_sequence_number_; 112 QuicPacketSequenceNumber largest_acked_sequence_number_;
113 113
114 // Track the largest sequence number outstanding when a CWND cutback occurs. 114 // Track the largest sequence number outstanding when a CWND cutback occurs.
115 QuicPacketSequenceNumber largest_sent_at_last_cutback_; 115 QuicPacketSequenceNumber largest_sent_at_last_cutback_;
116 116
117 // Congestion window in packets. 117 // Congestion window in packets.
118 QuicPacketCount congestion_window_; 118 QuicPacketCount congestion_window_;
119 119
120 // Congestion window before the last loss event or RTO. 120 // Congestion window before the last loss event or RTO.
121 QuicByteCount previous_congestion_window_; 121 QuicPacketCount previous_congestion_window_;
122 122
123 // Slow start congestion window in packets, aka ssthresh. 123 // Slow start congestion window in packets, aka ssthresh.
124 QuicPacketCount slowstart_threshold_; 124 QuicPacketCount slowstart_threshold_;
125 125
126 // Slow start threshold before the last loss event or RTO. 126 // Slow start threshold before the last loss event or RTO.
127 QuicPacketCount previous_slowstart_threshold_; 127 QuicPacketCount previous_slowstart_threshold_;
128 128
129 // Whether the last loss event caused us to exit slowstart. 129 // Whether the last loss event caused us to exit slowstart.
130 // Used for stats collection of slowstart_packets_lost 130 // Used for stats collection of slowstart_packets_lost
131 bool last_cutback_exited_slowstart_; 131 bool last_cutback_exited_slowstart_;
132 132
133 // Maximum number of outstanding packets for tcp. 133 // Maximum number of outstanding packets for tcp.
134 QuicPacketCount max_tcp_congestion_window_; 134 QuicPacketCount max_tcp_congestion_window_;
135 135
136 const QuicClock* clock_; 136 const QuicClock* clock_;
137 137
138 DISALLOW_COPY_AND_ASSIGN(TcpCubicSender); 138 DISALLOW_COPY_AND_ASSIGN(TcpCubicSender);
139 }; 139 };
140 140
141 } // namespace net 141 } // namespace net
142 142
143 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_ 143 #endif // NET_QUIC_CONGESTION_CONTROL_TCP_CUBIC_SENDER_H_
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