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Issue 1841863002: Update monet. (Closed) Base URL: https://github.com/domokit/monet.git@master
Patch Set: Created 4 years, 8 months 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 #include "net/quic/congestion_control/cubic.h" 5 #include "net/quic/congestion_control/cubic.h"
6 6
7 #include <stdint.h>
8
7 #include <algorithm> 9 #include <algorithm>
8 #include <cmath> 10 #include <cmath>
9 11
10 #include "base/basictypes.h" 12 #include "base/basictypes.h"
11 #include "base/logging.h" 13 #include "base/logging.h"
12 #include "net/quic/quic_flags.h" 14 #include "net/quic/quic_flags.h"
13 #include "net/quic/quic_protocol.h" 15 #include "net/quic/quic_protocol.h"
14 #include "net/quic/quic_time.h" 16 #include "net/quic/quic_time.h"
15 17
16 using std::max; 18 using std::max;
17 19
18 namespace net { 20 namespace net {
19 21
20 namespace { 22 namespace {
21 23
22 // Constants based on TCP defaults. 24 // Constants based on TCP defaults.
23 // The following constants are in 2^10 fractions of a second instead of ms to 25 // The following constants are in 2^10 fractions of a second instead of ms to
24 // allow a 10 shift right to divide. 26 // allow a 10 shift right to divide.
25 const int kCubeScale = 40; // 1024*1024^3 (first 1024 is from 0.100^3) 27 const int kCubeScale = 40; // 1024*1024^3 (first 1024 is from 0.100^3)
26 // where 0.100 is 100 ms which is the scaling 28 // where 0.100 is 100 ms which is the scaling
27 // round trip time. 29 // round trip time.
28 const int kCubeCongestionWindowScale = 410; 30 const int kCubeCongestionWindowScale = 410;
29 const uint64 kCubeFactor = (GG_UINT64_C(1) << kCubeScale) / 31 const uint64 kCubeFactor =
30 kCubeCongestionWindowScale; 32 (UINT64_C(1) << kCubeScale) / kCubeCongestionWindowScale;
31 33
32 const uint32 kDefaultNumConnections = 2; 34 const uint32 kDefaultNumConnections = 2;
33 const float kBeta = 0.7f; // Default Cubic backoff factor. 35 const float kBeta = 0.7f; // Default Cubic backoff factor.
34 // Additional backoff factor when loss occurs in the concave part of the Cubic 36 // Additional backoff factor when loss occurs in the concave part of the Cubic
35 // curve. This additional backoff factor is expected to give up bandwidth to 37 // curve. This additional backoff factor is expected to give up bandwidth to
36 // new concurrent flows and speed up convergence. 38 // new concurrent flows and speed up convergence.
37 const float kBetaLastMax = 0.85f; 39 const float kBetaLastMax = 0.85f;
38 40
39 } // namespace 41 } // namespace
40 42
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160 // congestion_window, use highest (fastest). 162 // congestion_window, use highest (fastest).
161 if (target_congestion_window < estimated_tcp_congestion_window_) { 163 if (target_congestion_window < estimated_tcp_congestion_window_) {
162 target_congestion_window = estimated_tcp_congestion_window_; 164 target_congestion_window = estimated_tcp_congestion_window_;
163 } 165 }
164 166
165 DVLOG(1) << "Target congestion_window: " << target_congestion_window; 167 DVLOG(1) << "Target congestion_window: " << target_congestion_window;
166 return target_congestion_window; 168 return target_congestion_window;
167 } 169 }
168 170
169 } // namespace net 171 } // namespace net
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