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

Issue 2561893002: Add QUIC_EXPORT macros (Closed)
Patch Set: More Created 4 years ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved. 1 // Copyright 2016 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 // BBR (Bottleneck Bandwidth and RTT) congestion control algorithm. 5 // BBR (Bottleneck Bandwidth and RTT) congestion control algorithm.
6 6
7 #ifndef NET_QUIC_CORE_CONGESTION_CONTROL_BBR_SENDER_H_ 7 #ifndef NET_QUIC_CORE_CONGESTION_CONTROL_BBR_SENDER_H_
8 #define NET_QUIC_CORE_CONGESTION_CONTROL_BBR_SENDER_H_ 8 #define NET_QUIC_CORE_CONGESTION_CONTROL_BBR_SENDER_H_
9 9
10 #include <cstdint> 10 #include <cstdint>
11 #include <ostream> 11 #include <ostream>
12 12
13 #include "net/quic/core/congestion_control/bandwidth_sampler.h" 13 #include "net/quic/core/congestion_control/bandwidth_sampler.h"
14 #include "net/quic/core/congestion_control/send_algorithm_interface.h" 14 #include "net/quic/core/congestion_control/send_algorithm_interface.h"
15 #include "net/quic/core/congestion_control/windowed_filter.h" 15 #include "net/quic/core/congestion_control/windowed_filter.h"
16 #include "net/quic/core/crypto/quic_random.h" 16 #include "net/quic/core/crypto/quic_random.h"
17 #include "net/quic/core/quic_bandwidth.h" 17 #include "net/quic/core/quic_bandwidth.h"
18 #include "net/quic/core/quic_packets.h" 18 #include "net/quic/core/quic_packets.h"
19 #include "net/quic/core/quic_time.h" 19 #include "net/quic/core/quic_time.h"
20 #include "net/quic/core/quic_unacked_packet_map.h" 20 #include "net/quic/core/quic_unacked_packet_map.h"
21 #include "net/quic/platform/api/quic_export.h"
21 22
22 namespace net { 23 namespace net {
23 24
24 class RttStats; 25 class RttStats;
25 26
26 typedef uint64_t QuicRoundTripCount; 27 typedef uint64_t QuicRoundTripCount;
27 28
28 // BbrSender implements BBR congestion control algorithm. BBR aims to estimate 29 // BbrSender implements BBR congestion control algorithm. BBR aims to estimate
29 // the current available Bottleneck Bandwidth and RTT (hence the name), and 30 // the current available Bottleneck Bandwidth and RTT (hence the name), and
30 // regulates the pacing rate and the size of the congestion window based on 31 // regulates the pacing rate and the size of the congestion window based on
31 // those signals. 32 // those signals.
32 // 33 //
33 // BBR relies on pacing in order to function properly. Do not use BBR when 34 // BBR relies on pacing in order to function properly. Do not use BBR when
34 // pacing is disabled. 35 // pacing is disabled.
35 // 36 //
36 // TODO(vasilvv): implement traffic policer (long-term sampling) mode. 37 // TODO(vasilvv): implement traffic policer (long-term sampling) mode.
37 // 38 //
38 // TODO(vasilvv): implement packet conservation. 39 // TODO(vasilvv): implement packet conservation.
39 class NET_EXPORT_PRIVATE BbrSender : public SendAlgorithmInterface { 40 class QUIC_EXPORT_PRIVATE BbrSender : public SendAlgorithmInterface {
40 public: 41 public:
41 enum Mode { 42 enum Mode {
42 // Startup phase of the connection. 43 // Startup phase of the connection.
43 STARTUP, 44 STARTUP,
44 // After achieving the highest possible bandwidth during the startup, lower 45 // After achieving the highest possible bandwidth during the startup, lower
45 // the pacing rate in order to drain the queue. 46 // the pacing rate in order to drain the queue.
46 DRAIN, 47 DRAIN,
47 // Cruising mode. 48 // Cruising mode.
48 PROBE_BW, 49 PROBE_BW,
49 // Temporarily slow down sending in order to empty the buffer and measure 50 // Temporarily slow down sending in order to empty the buffer and measure
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270 // A window used to limit the number of bytes in flight during loss recovery. 271 // A window used to limit the number of bytes in flight during loss recovery.
271 QuicByteCount recovery_window_; 272 QuicByteCount recovery_window_;
272 273
273 // Indicates whether to always only increase the pacing rate during startup. 274 // Indicates whether to always only increase the pacing rate during startup.
274 // Latches |FLAGS_quic_bbr_faster_startup|. 275 // Latches |FLAGS_quic_bbr_faster_startup|.
275 bool enforce_startup_pacing_rate_increase_; 276 bool enforce_startup_pacing_rate_increase_;
276 277
277 DISALLOW_COPY_AND_ASSIGN(BbrSender); 278 DISALLOW_COPY_AND_ASSIGN(BbrSender);
278 }; 279 };
279 280
280 NET_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os, 281 QUIC_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
281 const BbrSender::Mode& mode); 282 const BbrSender::Mode& mode);
282 NET_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os, 283 QUIC_EXPORT_PRIVATE std::ostream& operator<<(
283 const BbrSender::DebugState& state); 284 std::ostream& os,
285 const BbrSender::DebugState& state);
284 286
285 } // namespace net 287 } // namespace net
286 288
287 #endif // NET_QUIC_CORE_CONGESTION_CONTROL_BBR_SENDER_H_ 289 #endif // NET_QUIC_CORE_CONGESTION_CONTROL_BBR_SENDER_H_
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