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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/core/congestion_control/cubic.h" | 5 #include "net/quic/core/congestion_control/cubic.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 #include <cmath> | 8 #include <cmath> |
| 9 #include <cstdint> | 9 #include <cstdint> |
| 10 | 10 |
| 11 #include "base/logging.h" | |
| 12 #include "net/quic/core/quic_flags.h" | 11 #include "net/quic/core/quic_flags.h" |
| 13 #include "net/quic/core/quic_packets.h" | 12 #include "net/quic/core/quic_packets.h" |
| 13 #include "net/quic/platform/api/quic_logging.h" |
| 14 | 14 |
| 15 namespace net { | 15 namespace net { |
| 16 | 16 |
| 17 namespace { | 17 namespace { |
| 18 | 18 |
| 19 // Constants based on TCP defaults. | 19 // Constants based on TCP defaults. |
| 20 // The following constants are in 2^10 fractions of a second instead of ms to | 20 // The following constants are in 2^10 fractions of a second instead of ms to |
| 21 // allow a 10 shift right to divide. | 21 // allow a 10 shift right to divide. |
| 22 const int kCubeScale = 40; // 1024*1024^3 (first 1024 is from 0.100^3) | 22 const int kCubeScale = 40; // 1024*1024^3 (first 1024 is from 0.100^3) |
| 23 // where 0.100 is 100 ms which is the scaling | 23 // where 0.100 is 100 ms which is the scaling |
| (...skipping 182 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 206 | 206 |
| 207 // We have a new cubic congestion window. | 207 // We have a new cubic congestion window. |
| 208 last_target_congestion_window_ = target_congestion_window; | 208 last_target_congestion_window_ = target_congestion_window; |
| 209 | 209 |
| 210 // Compute target congestion_window based on cubic target and estimated TCP | 210 // Compute target congestion_window based on cubic target and estimated TCP |
| 211 // congestion_window, use highest (fastest). | 211 // congestion_window, use highest (fastest). |
| 212 if (target_congestion_window < estimated_tcp_congestion_window_) { | 212 if (target_congestion_window < estimated_tcp_congestion_window_) { |
| 213 target_congestion_window = estimated_tcp_congestion_window_; | 213 target_congestion_window = estimated_tcp_congestion_window_; |
| 214 } | 214 } |
| 215 | 215 |
| 216 DVLOG(1) << "Final target congestion_window: " << target_congestion_window; | 216 QUIC_DVLOG(1) << "Final target congestion_window: " |
| 217 << target_congestion_window; |
| 217 return target_congestion_window; | 218 return target_congestion_window; |
| 218 } | 219 } |
| 219 | 220 |
| 220 } // namespace net | 221 } // namespace net |
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