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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 <stdint.h> |  | 
| 8 #include <algorithm> | 7 #include <algorithm> | 
| 9 #include <cmath> | 8 #include <cmath> | 
|  | 9 #include <cstdint> | 
| 10 | 10 | 
| 11 #include "base/logging.h" | 11 #include "base/logging.h" | 
| 12 #include "net/quic/core/quic_flags.h" | 12 #include "net/quic/core/quic_flags.h" | 
| 13 #include "net/quic/core/quic_packets.h" | 13 #include "net/quic/core/quic_packets.h" | 
| 14 #include "net/quic/core/quic_time.h" |  | 
| 15 |  | 
| 16 | 14 | 
| 17 namespace net { | 15 namespace net { | 
| 18 | 16 | 
| 19 namespace { | 17 namespace { | 
| 20 | 18 | 
| 21 // Constants based on TCP defaults. | 19 // Constants based on TCP defaults. | 
| 22 // 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 | 
| 23 // allow a 10 shift right to divide. | 21 // allow a 10 shift right to divide. | 
| 24 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) | 
| 25                             // where 0.100 is 100 ms which is the scaling | 23                             // where 0.100 is 100 ms which is the scaling | 
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| 196   // congestion_window, use highest (fastest). | 194   // congestion_window, use highest (fastest). | 
| 197   if (target_congestion_window < estimated_tcp_congestion_window_) { | 195   if (target_congestion_window < estimated_tcp_congestion_window_) { | 
| 198     target_congestion_window = estimated_tcp_congestion_window_; | 196     target_congestion_window = estimated_tcp_congestion_window_; | 
| 199   } | 197   } | 
| 200 | 198 | 
| 201   DVLOG(1) << "Final target congestion_window: " << target_congestion_window; | 199   DVLOG(1) << "Final target congestion_window: " << target_congestion_window; | 
| 202   return target_congestion_window; | 200   return target_congestion_window; | 
| 203 } | 201 } | 
| 204 | 202 | 
| 205 }  // namespace net | 203 }  // namespace net | 
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