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Side by Side Diff: net/quic/core/congestion_control/hybrid_slow_start.h

Issue 2547583002: Landing Recent QUIC changes until Fri Nov 18 23:21:04 2016 +0000 (Closed)
Patch Set: Remove explicit HTTP/2 enum usage Created 4 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 // This class is a helper class to TcpCubicSender. 5 // This class is a helper class to TcpCubicSender.
6 // Slow start is the initial startup phase of TCP, it lasts until first packet 6 // Slow start is the initial startup phase of TCP, it lasts until first packet
7 // loss. This class implements hybrid slow start of the TCP cubic send side 7 // loss. This class implements hybrid slow start of the TCP cubic send side
8 // congestion algorithm. The key feaure of hybrid slow start is that it tries to 8 // congestion algorithm. The key feaure of hybrid slow start is that it tries to
9 // avoid running into the wall too hard during the slow start phase, which 9 // avoid running into the wall too hard during the slow start phase, which
10 // the traditional TCP implementation does. 10 // the traditional TCP implementation does.
11 // This does not implement ack train detection because it interacts poorly with 11 // This does not implement ack train detection because it interacts poorly with
12 // pacing. 12 // pacing.
13 // http://netsrv.csc.ncsu.edu/export/hybridstart_pfldnet08.pdf 13 // http://netsrv.csc.ncsu.edu/export/hybridstart_pfldnet08.pdf
14 // http://research.csc.ncsu.edu/netsrv/sites/default/files/hystart_techreport_20 08.pdf 14 // http://research.csc.ncsu.edu/netsrv/sites/default/files/hystart_techreport_20 08.pdf
15 15
16 #ifndef NET_QUIC_CONGESTION_CONTROL_HYBRID_SLOW_START_H_ 16 #ifndef NET_QUIC_CONGESTION_CONTROL_HYBRID_SLOW_START_H_
17 #define NET_QUIC_CONGESTION_CONTROL_HYBRID_SLOW_START_H_ 17 #define NET_QUIC_CONGESTION_CONTROL_HYBRID_SLOW_START_H_
18 18
19 #include <stdint.h> 19 #include <stdint.h>
20 20
21 #include "base/macros.h" 21 #include "base/macros.h"
22 #include "net/base/net_export.h" 22 #include "net/base/net_export.h"
23 #include "net/quic/core/quic_protocol.h" 23 #include "net/quic/core/quic_packets.h"
24 #include "net/quic/core/quic_time.h" 24 #include "net/quic/core/quic_time.h"
25 25
26 namespace net { 26 namespace net {
27 27
28 class NET_EXPORT_PRIVATE HybridSlowStart { 28 class NET_EXPORT_PRIVATE HybridSlowStart {
29 public: 29 public:
30 HybridSlowStart(); 30 HybridSlowStart();
31 31
32 void OnPacketAcked(QuicPacketNumber acked_packet_number); 32 void OnPacketAcked(QuicPacketNumber acked_packet_number);
33 33
(...skipping 41 matching lines...) Expand 10 before | Expand all | Expand 10 after
75 QuicPacketNumber end_packet_number_; // End of the receive round. 75 QuicPacketNumber end_packet_number_; // End of the receive round.
76 uint32_t rtt_sample_count_; // Number of rtt samples in the current round. 76 uint32_t rtt_sample_count_; // Number of rtt samples in the current round.
77 QuicTime::Delta current_min_rtt_; // The minimum rtt of current round. 77 QuicTime::Delta current_min_rtt_; // The minimum rtt of current round.
78 78
79 DISALLOW_COPY_AND_ASSIGN(HybridSlowStart); 79 DISALLOW_COPY_AND_ASSIGN(HybridSlowStart);
80 }; 80 };
81 81
82 } // namespace net 82 } // namespace net
83 83
84 #endif // NET_QUIC_CONGESTION_CONTROL_HYBRID_SLOW_START_H_ 84 #endif // NET_QUIC_CONGESTION_CONTROL_HYBRID_SLOW_START_H_
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