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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "net/quic/congestion_control/pacing_sender.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "base/memory/scoped_ptr.h" | |
| 9 #include "net/quic/quic_protocol.h" | |
| 10 #include "net/quic/test_tools/mock_clock.h" | |
| 11 #include "net/quic/test_tools/quic_test_utils.h" | |
| 12 #include "testing/gtest/include/gtest/gtest.h" | |
| 13 | |
| 14 using testing::Return; | |
| 15 using testing::StrictMock; | |
| 16 using testing::_; | |
| 17 | |
| 18 namespace net { | |
| 19 namespace test { | |
| 20 | |
| 21 const QuicByteCount kBytesInFlight = 1024; | |
| 22 const int kInitialBurstPackets = 10; | |
| 23 | |
| 24 class PacingSenderTest : public ::testing::Test { | |
| 25 protected: | |
| 26 PacingSenderTest() | |
| 27 : zero_time_(QuicTime::Delta::Zero()), | |
| 28 infinite_time_(QuicTime::Delta::Infinite()), | |
| 29 sequence_number_(1), | |
| 30 mock_sender_(new StrictMock<MockSendAlgorithm>()), | |
| 31 pacing_sender_(new PacingSender(mock_sender_, | |
| 32 QuicTime::Delta::FromMilliseconds(1), | |
| 33 0)) { | |
| 34 // Pick arbitrary time. | |
| 35 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(9)); | |
| 36 } | |
| 37 | |
| 38 ~PacingSenderTest() override {} | |
| 39 | |
| 40 void InitPacingRate(QuicPacketCount burst_size, QuicBandwidth bandwidth) { | |
| 41 pacing_sender_.reset(); | |
| 42 mock_sender_ = new StrictMock<MockSendAlgorithm>(); | |
| 43 pacing_sender_.reset(new PacingSender( | |
| 44 mock_sender_, QuicTime::Delta::FromMilliseconds(1), burst_size)); | |
| 45 EXPECT_CALL(*mock_sender_, PacingRate()).WillRepeatedly(Return(bandwidth)); | |
| 46 } | |
| 47 | |
| 48 void CheckPacketIsSentImmediately(HasRetransmittableData retransmittable_data, | |
| 49 QuicByteCount bytes_in_flight) { | |
| 50 // In order for the packet to be sendable, the underlying sender must | |
| 51 // permit it to be sent immediately. | |
| 52 for (int i = 0; i < 2; ++i) { | |
| 53 EXPECT_CALL(*mock_sender_, TimeUntilSend(clock_.Now(), bytes_in_flight, | |
| 54 retransmittable_data)) | |
| 55 .WillOnce(Return(zero_time_)); | |
| 56 // Verify that the packet can be sent immediately. | |
| 57 EXPECT_EQ(zero_time_, | |
| 58 pacing_sender_->TimeUntilSend(clock_.Now(), bytes_in_flight, | |
| 59 retransmittable_data)); | |
| 60 } | |
| 61 | |
| 62 // Actually send the packet. | |
| 63 EXPECT_CALL(*mock_sender_, | |
| 64 OnPacketSent(clock_.Now(), bytes_in_flight, sequence_number_, | |
| 65 kMaxPacketSize, retransmittable_data)); | |
| 66 pacing_sender_->OnPacketSent(clock_.Now(), bytes_in_flight, | |
| 67 sequence_number_++, kMaxPacketSize, | |
| 68 retransmittable_data); | |
| 69 } | |
| 70 | |
| 71 void CheckPacketIsSentImmediately() { | |
| 72 CheckPacketIsSentImmediately(HAS_RETRANSMITTABLE_DATA, kBytesInFlight); | |
| 73 } | |
| 74 | |
| 75 void CheckAckIsSentImmediately() { | |
| 76 CheckPacketIsSentImmediately(NO_RETRANSMITTABLE_DATA, kBytesInFlight); | |
| 77 } | |
| 78 | |
| 79 void CheckPacketIsDelayed(QuicTime::Delta delay) { | |
| 80 // In order for the packet to be sendable, the underlying sender must | |
| 81 // permit it to be sent immediately. | |
| 82 for (int i = 0; i < 2; ++i) { | |
| 83 EXPECT_CALL(*mock_sender_, TimeUntilSend(clock_.Now(), | |
| 84 kBytesInFlight, | |
| 85 HAS_RETRANSMITTABLE_DATA)) | |
| 86 .WillOnce(Return(zero_time_)); | |
| 87 // Verify that the packet is delayed. | |
| 88 EXPECT_EQ(delay.ToMicroseconds(), | |
| 89 pacing_sender_->TimeUntilSend( | |
| 90 clock_.Now(), kBytesInFlight, | |
| 91 HAS_RETRANSMITTABLE_DATA).ToMicroseconds()); | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 void UpdateRtt() { | |
| 96 EXPECT_CALL(*mock_sender_, OnCongestionEvent(true, kBytesInFlight, _, _)); | |
| 97 SendAlgorithmInterface::CongestionVector empty_map; | |
| 98 pacing_sender_->OnCongestionEvent(true, kBytesInFlight, empty_map, | |
| 99 empty_map); | |
| 100 } | |
| 101 | |
| 102 const QuicTime::Delta zero_time_; | |
| 103 const QuicTime::Delta infinite_time_; | |
| 104 MockClock clock_; | |
| 105 QuicPacketSequenceNumber sequence_number_; | |
| 106 StrictMock<MockSendAlgorithm>* mock_sender_; | |
| 107 scoped_ptr<PacingSender> pacing_sender_; | |
| 108 }; | |
| 109 | |
| 110 TEST_F(PacingSenderTest, NoSend) { | |
| 111 for (int i = 0; i < 2; ++i) { | |
| 112 EXPECT_CALL(*mock_sender_, TimeUntilSend(clock_.Now(), | |
| 113 kBytesInFlight, | |
| 114 HAS_RETRANSMITTABLE_DATA)) | |
| 115 .WillOnce(Return(infinite_time_)); | |
| 116 EXPECT_EQ(infinite_time_, | |
| 117 pacing_sender_->TimeUntilSend(clock_.Now(), | |
| 118 kBytesInFlight, | |
| 119 HAS_RETRANSMITTABLE_DATA)); | |
| 120 } | |
| 121 } | |
| 122 | |
| 123 TEST_F(PacingSenderTest, SendNow) { | |
| 124 for (int i = 0; i < 2; ++i) { | |
| 125 EXPECT_CALL(*mock_sender_, TimeUntilSend(clock_.Now(), | |
| 126 kBytesInFlight, | |
| 127 HAS_RETRANSMITTABLE_DATA)) | |
| 128 .WillOnce(Return(zero_time_)); | |
| 129 EXPECT_EQ(zero_time_, | |
| 130 pacing_sender_->TimeUntilSend(clock_.Now(), | |
| 131 kBytesInFlight, | |
| 132 HAS_RETRANSMITTABLE_DATA)); | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 TEST_F(PacingSenderTest, VariousSending) { | |
| 137 // Configure pacing rate of 1 packet per 1 ms, no initial burst. | |
| 138 InitPacingRate(0, QuicBandwidth::FromBytesAndTimeDelta( | |
| 139 kMaxPacketSize, QuicTime::Delta::FromMilliseconds(1))); | |
| 140 | |
| 141 // Now update the RTT and verify that packets are actually paced. | |
| 142 UpdateRtt(); | |
| 143 | |
| 144 CheckPacketIsSentImmediately(); | |
| 145 CheckPacketIsSentImmediately(); | |
| 146 | |
| 147 // The first packet was a "make up", then we sent two packets "into the | |
| 148 // future", so the delay should be 2. | |
| 149 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 150 | |
| 151 // Wake up on time. | |
| 152 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(2)); | |
| 153 CheckPacketIsSentImmediately(); | |
| 154 CheckPacketIsSentImmediately(); | |
| 155 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 156 CheckAckIsSentImmediately(); | |
| 157 | |
| 158 // Wake up late. | |
| 159 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(4)); | |
| 160 CheckPacketIsSentImmediately(); | |
| 161 CheckPacketIsSentImmediately(); | |
| 162 CheckPacketIsSentImmediately(); | |
| 163 CheckPacketIsSentImmediately(); | |
| 164 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 165 | |
| 166 // Wake up really late. | |
| 167 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(8)); | |
| 168 CheckPacketIsSentImmediately(); | |
| 169 CheckPacketIsSentImmediately(); | |
| 170 CheckPacketIsSentImmediately(); | |
| 171 CheckPacketIsSentImmediately(); | |
| 172 CheckPacketIsSentImmediately(); | |
| 173 CheckPacketIsSentImmediately(); | |
| 174 CheckPacketIsSentImmediately(); | |
| 175 CheckPacketIsSentImmediately(); | |
| 176 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 177 | |
| 178 // Wake up really late again, but application pause partway through. | |
| 179 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(8)); | |
| 180 CheckPacketIsSentImmediately(); | |
| 181 CheckPacketIsSentImmediately(); | |
| 182 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(100)); | |
| 183 CheckPacketIsSentImmediately(); | |
| 184 CheckPacketIsSentImmediately(); | |
| 185 CheckPacketIsSentImmediately(); | |
| 186 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 187 | |
| 188 // Wake up too early. | |
| 189 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 190 | |
| 191 // Wake up early, but after enough time has passed to permit a send. | |
| 192 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(1)); | |
| 193 CheckPacketIsSentImmediately(); | |
| 194 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 195 } | |
| 196 | |
| 197 // TODO(ianswett): Remove this test. | |
| 198 TEST_F(PacingSenderTest, DISABLED_CongestionAvoidanceSending) { | |
| 199 // Configure pacing rate of 1 packet per 1 ms. | |
| 200 EXPECT_CALL(*mock_sender_, PacingRate()) | |
| 201 .WillRepeatedly(Return(QuicBandwidth::FromBytesAndTimeDelta( | |
| 202 kMaxPacketSize * 1.25, QuicTime::Delta::FromMilliseconds(2)))); | |
| 203 | |
| 204 // Now update the RTT and verify that packets are actually paced. | |
| 205 UpdateRtt(); | |
| 206 | |
| 207 CheckPacketIsSentImmediately(); | |
| 208 CheckPacketIsSentImmediately(); | |
| 209 | |
| 210 // The first packet was a "make up", then we sent two packets "into the | |
| 211 // future", so the delay should be 2200us. | |
| 212 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(2200)); | |
| 213 | |
| 214 // Wake up on time. | |
| 215 clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(2200)); | |
| 216 CheckPacketIsSentImmediately(); | |
| 217 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(1600)); | |
| 218 CheckAckIsSentImmediately(); | |
| 219 | |
| 220 // Wake up late. | |
| 221 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(4)); | |
| 222 CheckPacketIsSentImmediately(); | |
| 223 CheckPacketIsSentImmediately(); | |
| 224 CheckPacketIsSentImmediately(); | |
| 225 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(2400)); | |
| 226 | |
| 227 // Wake up really late. | |
| 228 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(8)); | |
| 229 CheckPacketIsSentImmediately(); | |
| 230 CheckPacketIsSentImmediately(); | |
| 231 CheckPacketIsSentImmediately(); | |
| 232 CheckPacketIsSentImmediately(); | |
| 233 CheckPacketIsSentImmediately(); | |
| 234 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(2400)); | |
| 235 | |
| 236 // Wake up really late again, but application pause partway through. | |
| 237 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(8)); | |
| 238 CheckPacketIsSentImmediately(); | |
| 239 CheckPacketIsSentImmediately(); | |
| 240 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(100)); | |
| 241 CheckPacketIsSentImmediately(); | |
| 242 CheckPacketIsSentImmediately(); | |
| 243 CheckPacketIsSentImmediately(); | |
| 244 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(2200)); | |
| 245 | |
| 246 // Wake up too early. | |
| 247 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(2200)); | |
| 248 | |
| 249 // Wake up early, but after enough time has passed to permit a send. | |
| 250 clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(1200)); | |
| 251 CheckPacketIsSentImmediately(); | |
| 252 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(2600)); | |
| 253 } | |
| 254 | |
| 255 TEST_F(PacingSenderTest, InitialBurst) { | |
| 256 // Configure pacing rate of 1 packet per 1 ms. | |
| 257 InitPacingRate(10, QuicBandwidth::FromBytesAndTimeDelta( | |
| 258 kMaxPacketSize, QuicTime::Delta::FromMilliseconds(1))); | |
| 259 | |
| 260 // Update the RTT and verify that the first 10 packets aren't paced. | |
| 261 UpdateRtt(); | |
| 262 | |
| 263 // Send 10 packets, and verify that they are not paced. | |
| 264 for (int i = 0 ; i < kInitialBurstPackets; ++i) { | |
| 265 CheckPacketIsSentImmediately(); | |
| 266 } | |
| 267 | |
| 268 // The first packet was a "make up", then we sent two packets "into the | |
| 269 // future", so the delay should be 2ms. | |
| 270 CheckPacketIsSentImmediately(); | |
| 271 CheckPacketIsSentImmediately(); | |
| 272 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 273 | |
| 274 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5)); | |
| 275 CheckPacketIsSentImmediately(); | |
| 276 | |
| 277 // Next time TimeUntilSend is called with no bytes in flight, pacing should | |
| 278 // allow a packet to be sent, and when it's sent, the tokens are refilled. | |
| 279 CheckPacketIsSentImmediately(HAS_RETRANSMITTABLE_DATA, 0); | |
| 280 for (int i = 0; i < kInitialBurstPackets - 1; ++i) { | |
| 281 CheckPacketIsSentImmediately(); | |
| 282 } | |
| 283 | |
| 284 // The first packet was a "make up", then we sent two packets "into the | |
| 285 // future", so the delay should be 2ms. | |
| 286 CheckPacketIsSentImmediately(); | |
| 287 CheckPacketIsSentImmediately(); | |
| 288 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 289 } | |
| 290 | |
| 291 TEST_F(PacingSenderTest, InitialBurstNoRttMeasurement) { | |
| 292 // Configure pacing rate of 1 packet per 1 ms. | |
| 293 InitPacingRate(10, QuicBandwidth::FromBytesAndTimeDelta( | |
| 294 kMaxPacketSize, QuicTime::Delta::FromMilliseconds(1))); | |
| 295 | |
| 296 // Send 10 packets, and verify that they are not paced. | |
| 297 for (int i = 0 ; i < kInitialBurstPackets; ++i) { | |
| 298 CheckPacketIsSentImmediately(); | |
| 299 } | |
| 300 | |
| 301 // The first packet was a "make up", then we sent two packets "into the | |
| 302 // future", so the delay should be 2ms. | |
| 303 CheckPacketIsSentImmediately(); | |
| 304 CheckPacketIsSentImmediately(); | |
| 305 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 306 | |
| 307 | |
| 308 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5)); | |
| 309 CheckPacketIsSentImmediately(); | |
| 310 | |
| 311 // Next time TimeUntilSend is called with no bytes in flight, the tokens | |
| 312 // should be refilled and there should be no delay. | |
| 313 CheckPacketIsSentImmediately(HAS_RETRANSMITTABLE_DATA, 0); | |
| 314 // Send 10 packets, and verify that they are not paced. | |
| 315 for (int i = 0; i < kInitialBurstPackets - 1; ++i) { | |
| 316 CheckPacketIsSentImmediately(); | |
| 317 } | |
| 318 | |
| 319 // The first packet was a "make up", then we sent two packets "into the | |
| 320 // future", so the delay should be 2ms. | |
| 321 CheckPacketIsSentImmediately(); | |
| 322 CheckPacketIsSentImmediately(); | |
| 323 CheckPacketIsDelayed(QuicTime::Delta::FromMilliseconds(2)); | |
| 324 } | |
| 325 | |
| 326 TEST_F(PacingSenderTest, FastSending) { | |
| 327 // Ensure the pacing sender paces, even when the inter-packet spacing is less | |
| 328 // than the pacing granularity. | |
| 329 InitPacingRate(10, | |
| 330 QuicBandwidth::FromBytesAndTimeDelta( | |
| 331 2 * kMaxPacketSize, QuicTime::Delta::FromMilliseconds(1))); | |
| 332 | |
| 333 // Update the RTT and verify that the first 10 packets aren't paced. | |
| 334 UpdateRtt(); | |
| 335 | |
| 336 // Send 10 packets, and verify that they are not paced. | |
| 337 for (int i = 0; i < kInitialBurstPackets; ++i) { | |
| 338 CheckPacketIsSentImmediately(); | |
| 339 } | |
| 340 | |
| 341 // The first packet was a "make up", then we sent two packets "into the | |
| 342 // future", since it's 2 packets/ms, so the delay should be 1.5ms. | |
| 343 CheckPacketIsSentImmediately(); | |
| 344 CheckPacketIsSentImmediately(); | |
| 345 CheckPacketIsSentImmediately(); | |
| 346 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(1500)); | |
| 347 | |
| 348 clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5)); | |
| 349 CheckPacketIsSentImmediately(); | |
| 350 | |
| 351 // Next time TimeUntilSend is called with no bytes in flight, the tokens | |
| 352 // should be refilled and there should be no delay. | |
| 353 CheckPacketIsSentImmediately(HAS_RETRANSMITTABLE_DATA, 0); | |
| 354 for (int i = 0; i < kInitialBurstPackets - 1; ++i) { | |
| 355 CheckPacketIsSentImmediately(); | |
| 356 } | |
| 357 | |
| 358 // The first packet was a "make up", then we sent two packets "into the | |
| 359 // future", so the delay should be 1.5ms. | |
| 360 CheckPacketIsSentImmediately(); | |
| 361 CheckPacketIsSentImmediately(); | |
| 362 CheckPacketIsSentImmediately(); | |
| 363 CheckPacketIsDelayed(QuicTime::Delta::FromMicroseconds(1500)); | |
| 364 } | |
| 365 | |
| 366 } // namespace test | |
| 367 } // namespace net | |
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Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master