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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/congestion_control/rtt_stats.h" | 5 #include "net/quic/congestion_control/rtt_stats.h" |
| 6 | 6 |
| 7 #include "base/logging.h" | 7 #include "base/logging.h" |
| 8 #include "testing/gtest/include/gtest/gtest.h" | 8 #include "testing/gtest/include/gtest/gtest.h" |
| 9 | 9 |
| 10 namespace net { | 10 namespace net { |
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| 44 TEST_F(RttStatsTest, RecentMinRtt) { | 44 TEST_F(RttStatsTest, RecentMinRtt) { |
| 45 rtt_stats_.UpdateRtt(QuicTime::Delta::FromMilliseconds(10), | 45 rtt_stats_.UpdateRtt(QuicTime::Delta::FromMilliseconds(10), |
| 46 QuicTime::Delta::Zero(), | 46 QuicTime::Delta::Zero(), |
| 47 QuicTime::Zero()); | 47 QuicTime::Zero()); |
| 48 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); | 48 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); |
| 49 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.recent_min_rtt()); | 49 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.recent_min_rtt()); |
| 50 | 50 |
| 51 rtt_stats_.SampleNewRecentMinRtt(4); | 51 rtt_stats_.SampleNewRecentMinRtt(4); |
| 52 for (int i = 0; i < 3; ++i) { | 52 for (int i = 0; i < 3; ++i) { |
| 53 rtt_stats_.UpdateRtt(QuicTime::Delta::FromMilliseconds(50), | 53 rtt_stats_.UpdateRtt(QuicTime::Delta::FromMilliseconds(50), |
| 54 QuicTime::Delta::Zero(), | 54 QuicTime::Delta::Zero(), |
| 55 QuicTime::Zero()); | 55 QuicTime::Zero()); |
| 56 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); | 56 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); |
| 57 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), | 57 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), |
| 58 rtt_stats_.recent_min_rtt()); | 58 rtt_stats_.recent_min_rtt()); |
| 59 } | 59 } |
| 60 rtt_stats_.UpdateRtt(QuicTime::Delta::FromMilliseconds(50), | 60 rtt_stats_.UpdateRtt(QuicTime::Delta::FromMilliseconds(50), |
| 61 QuicTime::Delta::Zero(), | 61 QuicTime::Delta::Zero(), |
| 62 QuicTime::Zero()); | 62 QuicTime::Zero()); |
| 63 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); | 63 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); |
| 64 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(50), rtt_stats_.recent_min_rtt()); | 64 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(50), rtt_stats_.recent_min_rtt()); |
| 65 } | 65 } |
| 66 | 66 |
| 67 TEST_F(RttStatsTest, WindowedRecentMinRtt) { | 67 TEST_F(RttStatsTest, WindowedRecentMinRtt) { |
| 68 // Set the window to 99ms, so 25ms is more than a quarter rtt. | 68 // Set the window to 99ms, so 25ms is more than a quarter rtt. |
| 69 rtt_stats_.set_recent_min_rtt_window(QuicTime::Delta::FromMilliseconds(99)); | 69 rtt_stats_.set_recent_min_rtt_window(QuicTime::Delta::FromMilliseconds(99)); |
| 70 | 70 |
| 71 QuicTime now = QuicTime::Zero(); | 71 QuicTime now = QuicTime::Zero(); |
| 72 QuicTime::Delta rtt_sample = QuicTime::Delta::FromMilliseconds(10); | 72 QuicTime::Delta rtt_sample = QuicTime::Delta::FromMilliseconds(10); |
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| 99 } | 99 } |
| 100 } | 100 } |
| 101 | 101 |
| 102 // A new quarter rtt low sets that, but nothing else. | 102 // A new quarter rtt low sets that, but nothing else. |
| 103 rtt_sample = rtt_sample.Subtract(QuicTime::Delta::FromMilliseconds(5)); | 103 rtt_sample = rtt_sample.Subtract(QuicTime::Delta::FromMilliseconds(5)); |
| 104 rtt_stats_.UpdateRtt(rtt_sample, QuicTime::Delta::Zero(), now); | 104 rtt_stats_.UpdateRtt(rtt_sample, QuicTime::Delta::Zero(), now); |
| 105 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); | 105 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); |
| 106 EXPECT_EQ(rtt_sample, RttStatsPeer::GetQuarterWindowRtt(&rtt_stats_)); | 106 EXPECT_EQ(rtt_sample, RttStatsPeer::GetQuarterWindowRtt(&rtt_stats_)); |
| 107 EXPECT_EQ(rtt_sample.Subtract(QuicTime::Delta::FromMilliseconds(5)), | 107 EXPECT_EQ(rtt_sample.Subtract(QuicTime::Delta::FromMilliseconds(5)), |
| 108 RttStatsPeer::GetHalfWindowRtt(&rtt_stats_)); | 108 RttStatsPeer::GetHalfWindowRtt(&rtt_stats_)); |
| 109 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(70), | 109 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(70), rtt_stats_.recent_min_rtt()); |
| 110 rtt_stats_.recent_min_rtt()); | |
| 111 | 110 |
| 112 // A new half rtt low sets that and the quarter rtt low. | 111 // A new half rtt low sets that and the quarter rtt low. |
| 113 rtt_sample = rtt_sample.Subtract(QuicTime::Delta::FromMilliseconds(15)); | 112 rtt_sample = rtt_sample.Subtract(QuicTime::Delta::FromMilliseconds(15)); |
| 114 rtt_stats_.UpdateRtt(rtt_sample, QuicTime::Delta::Zero(), now); | 113 rtt_stats_.UpdateRtt(rtt_sample, QuicTime::Delta::Zero(), now); |
| 115 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); | 114 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); |
| 116 EXPECT_EQ(rtt_sample, RttStatsPeer::GetQuarterWindowRtt(&rtt_stats_)); | 115 EXPECT_EQ(rtt_sample, RttStatsPeer::GetQuarterWindowRtt(&rtt_stats_)); |
| 117 EXPECT_EQ(rtt_sample, RttStatsPeer::GetHalfWindowRtt(&rtt_stats_)); | 116 EXPECT_EQ(rtt_sample, RttStatsPeer::GetHalfWindowRtt(&rtt_stats_)); |
| 118 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(70), | 117 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(70), rtt_stats_.recent_min_rtt()); |
| 119 rtt_stats_.recent_min_rtt()); | |
| 120 | 118 |
| 121 // A new full window loss sets the recent_min_rtt, but not min_rtt. | 119 // A new full window loss sets the recent_min_rtt, but not min_rtt. |
| 122 rtt_sample = QuicTime::Delta::FromMilliseconds(65); | 120 rtt_sample = QuicTime::Delta::FromMilliseconds(65); |
| 123 rtt_stats_.UpdateRtt(rtt_sample, QuicTime::Delta::Zero(), now); | 121 rtt_stats_.UpdateRtt(rtt_sample, QuicTime::Delta::Zero(), now); |
| 124 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); | 122 EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10), rtt_stats_.min_rtt()); |
| 125 EXPECT_EQ(rtt_sample, RttStatsPeer::GetQuarterWindowRtt(&rtt_stats_)); | 123 EXPECT_EQ(rtt_sample, RttStatsPeer::GetQuarterWindowRtt(&rtt_stats_)); |
| 126 EXPECT_EQ(rtt_sample, RttStatsPeer::GetHalfWindowRtt(&rtt_stats_)); | 124 EXPECT_EQ(rtt_sample, RttStatsPeer::GetHalfWindowRtt(&rtt_stats_)); |
| 127 EXPECT_EQ(rtt_sample, rtt_stats_.recent_min_rtt()); | 125 EXPECT_EQ(rtt_sample, rtt_stats_.recent_min_rtt()); |
| 128 | 126 |
| 129 // A new all time low sets both the min_rtt and the recent_min_rtt. | 127 // A new all time low sets both the min_rtt and the recent_min_rtt. |
| 130 rtt_sample = QuicTime::Delta::FromMilliseconds(5); | 128 rtt_sample = QuicTime::Delta::FromMilliseconds(5); |
| 131 rtt_stats_.UpdateRtt(rtt_sample, QuicTime::Delta::Zero(), now); | 129 rtt_stats_.UpdateRtt(rtt_sample, QuicTime::Delta::Zero(), now); |
| 132 | 130 |
| 133 EXPECT_EQ(rtt_sample, rtt_stats_.min_rtt()); | 131 EXPECT_EQ(rtt_sample, rtt_stats_.min_rtt()); |
| 134 EXPECT_EQ(rtt_sample, RttStatsPeer::GetQuarterWindowRtt(&rtt_stats_)); | 132 EXPECT_EQ(rtt_sample, RttStatsPeer::GetQuarterWindowRtt(&rtt_stats_)); |
| 135 EXPECT_EQ(rtt_sample, RttStatsPeer::GetHalfWindowRtt(&rtt_stats_)); | 133 EXPECT_EQ(rtt_sample, RttStatsPeer::GetHalfWindowRtt(&rtt_stats_)); |
| 136 EXPECT_EQ(rtt_sample, rtt_stats_.recent_min_rtt()); | 134 EXPECT_EQ(rtt_sample, rtt_stats_.recent_min_rtt()); |
| 137 } | 135 } |
| 138 | 136 |
| 139 | |
| 140 | |
| 141 } // namespace test | 137 } // namespace test |
| 142 } // namespace net | 138 } // namespace net |
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