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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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/rtt_stats.h" | 5 #include "net/quic/core/congestion_control/rtt_stats.h" |
| 6 | 6 |
| 7 #include <cstdlib> // std::abs | 7 #include <cstdlib> // std::abs |
| 8 | 8 |
| 9 #include "net/quic/core/quic_flags.h" | |
| 10 | |
| 11 | |
| 12 namespace net { | 9 namespace net { |
| 13 | 10 |
| 14 namespace { | 11 namespace { |
| 15 | 12 |
| 16 // Default initial rtt used before any samples are received. | 13 // Default initial rtt used before any samples are received. |
| 17 const int kInitialRttMs = 100; | 14 const int kInitialRttMs = 100; |
| 18 const float kAlpha = 0.125f; | 15 const float kAlpha = 0.125f; |
| 19 const float kOneMinusAlpha = (1 - kAlpha); | 16 const float kOneMinusAlpha = (1 - kAlpha); |
| 20 const float kBeta = 0.25f; | 17 const float kBeta = 0.25f; |
| 21 const float kOneMinusBeta = (1 - kBeta); | 18 const float kOneMinusBeta = (1 - kBeta); |
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| 83 | 80 |
| 84 void RttStats::OnConnectionMigration() { | 81 void RttStats::OnConnectionMigration() { |
| 85 latest_rtt_ = QuicTime::Delta::Zero(); | 82 latest_rtt_ = QuicTime::Delta::Zero(); |
| 86 min_rtt_ = QuicTime::Delta::Zero(); | 83 min_rtt_ = QuicTime::Delta::Zero(); |
| 87 smoothed_rtt_ = QuicTime::Delta::Zero(); | 84 smoothed_rtt_ = QuicTime::Delta::Zero(); |
| 88 mean_deviation_ = QuicTime::Delta::Zero(); | 85 mean_deviation_ = QuicTime::Delta::Zero(); |
| 89 initial_rtt_us_ = kInitialRttMs * kNumMicrosPerMilli; | 86 initial_rtt_us_ = kInitialRttMs * kNumMicrosPerMilli; |
| 90 } | 87 } |
| 91 | 88 |
| 92 } // namespace net | 89 } // namespace net |
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