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This is a rollback of https://chromium-review.googlesource.com/c/external/webrtc/+/616724

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it degraded results of the ANA testing

BUG=webrtc:8105

Review-Url: https://codereview.webrtc.org/3011323002
Cr-Commit-Position: refs/heads/master@{#19902}
This commit is contained in:
alexnarest
2017-09-19 12:00:32 -07:00
committed by Commit Bot
parent 75dd6d4b96
commit b335e31bcb
3 changed files with 23 additions and 37 deletions
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9
modules/congestion_controller/delay_based_bwe_unittest.cc
View File

@ -139,6 +139,15 @@ TEST_F(DelayBasedBweTest, ProbeDetectionSlowerArrivalHighBitrate) {
kTargetUtilizationFraction * 4000000u, 10000u);
}
TEST_F(DelayBasedBweTest, GetExpectedBwePeriodMs) {
int64_t default_interval_ms = bitrate_estimator_->GetExpectedBwePeriodMs();
EXPECT_GT(default_interval_ms, 0);
CapacityDropTestHelper(1, true, 333, 0);
int64_t interval_ms = bitrate_estimator_->GetExpectedBwePeriodMs();
EXPECT_GT(interval_ms, 0);
EXPECT_NE(interval_ms, default_interval_ms);
}
TEST_F(DelayBasedBweTest, InitialBehavior) {
InitialBehaviorTestHelper(730000);
}

18
modules/remote_bitrate_estimator/aimd_rate_control.cc
View File

@ -136,12 +136,13 @@ int AimdRateControl::GetNearMaxIncreaseRateBps() const {
}
int AimdRateControl::GetExpectedBandwidthPeriodMs() const {
constexpr int kMinPeriodMs = 500;
constexpr int kMinPeriodMs = 2000;
constexpr int kDefaultPeriodMs = 3000;
constexpr int kMaxPeriodMs = 50000;
int increase_rate = GetNearMaxIncreaseRateBps();
if (!last_decrease_)
return kMinPeriodMs;
return kDefaultPeriodMs;
return std::min(kMaxPeriodMs,
std::max<int>(1000 * static_cast<int64_t>(*last_decrease_) /
@ -210,17 +211,8 @@ uint32_t AimdRateControl::ChangeBitrate(uint32_t new_bitrate_bps,
if (bitrate_is_initialized_ &&
incoming_bitrate_bps < current_bitrate_bps_) {
constexpr float kDegradationFactor = 0.9f;
if (new_bitrate_bps <
kDegradationFactor * beta_ * current_bitrate_bps_) {
// If bitrate decreases more than a normal back off after overuse, it
// indicates a real network degradation. We do not let such a decrease
// to determine the bandwidth estimation period.
last_decrease_ = rtc::Optional<int>();
} else {
last_decrease_ = rtc::Optional<int>(
current_bitrate_bps_ - new_bitrate_bps);
}
last_decrease_ =
rtc::Optional<int>(current_bitrate_bps_ - new_bitrate_bps);
}
if (incoming_bitrate_kbps <
avg_max_bitrate_kbps_ - 3 * std_max_bit_rate) {

33
modules/remote_bitrate_estimator/aimd_rate_control_unittest.cc
View File

@ -18,8 +18,9 @@ namespace {
constexpr int64_t kClockInitialTime = 123456;
constexpr int kMinBwePeriodMs = 500;
constexpr int kMinBwePeriodMs = 2000;
constexpr int kMaxBwePeriodMs = 50000;
constexpr int kDefaultPeriodMs = 3000;
// After an overuse, we back off to 85% to the received bitrate.
constexpr double kFractionAfterOveruse = 0.85;
@ -81,8 +82,7 @@ TEST(AimdRateControlTest, GetIncreaseRateAndBandwidthPeriod) {
states.simulated_clock->TimeInMilliseconds());
EXPECT_NEAR(14000, states.aimd_rate_control->GetNearMaxIncreaseRateBps(),
1000);
EXPECT_EQ(kMinBwePeriodMs,
states.aimd_rate_control->GetExpectedBandwidthPeriodMs());
EXPECT_EQ(3000, states.aimd_rate_control->GetExpectedBandwidthPeriodMs());
}
TEST(AimdRateControlTest, BweLimitedByAckedBitrate) {
@ -124,15 +124,15 @@ TEST(AimdRateControlTest, BweNotLimitedByDecreasingAckedBitrate) {
EXPECT_EQ(new_estimate, prev_estimate);
}
TEST(AimdRateControlTest, MinPeriodUntilFirstOveruse) {
TEST(AimdRateControlTest, DefaultPeriodUntilFirstOveruse) {
auto states = CreateAimdRateControlStates();
states.aimd_rate_control->SetStartBitrate(300000);
EXPECT_EQ(kMinBwePeriodMs,
EXPECT_EQ(kDefaultPeriodMs,
states.aimd_rate_control->GetExpectedBandwidthPeriodMs());
states.simulated_clock->AdvanceTimeMilliseconds(100);
UpdateRateControl(states, BandwidthUsage::kBwOverusing, 280000,
UpdateRateControl(states, BandwidthUsage::kBwOverusing, 100000,
states.simulated_clock->TimeInMilliseconds());
EXPECT_NE(kMinBwePeriodMs,
EXPECT_NE(kDefaultPeriodMs,
states.aimd_rate_control->GetExpectedBandwidthPeriodMs());
}
@ -152,21 +152,6 @@ TEST(AimdRateControlTest, ExpectedPeriodAfter20kbpsDropAnd5kbpsIncrease) {
EXPECT_EQ(4000, states.aimd_rate_control->GetExpectedBandwidthPeriodMs());
}
TEST(AimdRateControlTest, MinPeriodAfterLargeBitrateDecrease) {
auto states = CreateAimdRateControlStates();
constexpr int kInitialBitrate = 110000;
states.aimd_rate_control->SetEstimate(
kInitialBitrate, states.simulated_clock->TimeInMilliseconds());
states.simulated_clock->AdvanceTimeMilliseconds(100);
// Make such a large drop in bitrate that should be treated as network
// degradation.
constexpr int kAckedBitrate = kInitialBitrate * 3 / 4 / kFractionAfterOveruse;
UpdateRateControl(states, BandwidthUsage::kBwOverusing, kAckedBitrate,
states.simulated_clock->TimeInMilliseconds());
EXPECT_EQ(kMinBwePeriodMs,
states.aimd_rate_control->GetExpectedBandwidthPeriodMs());
}
TEST(AimdRateControlTest, BandwidthPeriodIsNotBelowMin) {
auto states = CreateAimdRateControlStates();
constexpr int kInitialBitrate = 10000;
@ -182,12 +167,12 @@ TEST(AimdRateControlTest, BandwidthPeriodIsNotBelowMin) {
TEST(AimdRateControlTest, BandwidthPeriodIsNotAboveMax) {
auto states = CreateAimdRateControlStates();
constexpr int kInitialBitrate = 50000000;
constexpr int kInitialBitrate = 10010000;
states.aimd_rate_control->SetEstimate(
kInitialBitrate, states.simulated_clock->TimeInMilliseconds());
states.simulated_clock->AdvanceTimeMilliseconds(100);
// Make a large (10 Mbps) bitrate drop to 10 kbps.
constexpr int kAckedBitrate = 40000000 / kFractionAfterOveruse;
constexpr int kAckedBitrate = 10000 / kFractionAfterOveruse;
UpdateRateControl(states, BandwidthUsage::kBwOverusing, kAckedBitrate,
states.simulated_clock->TimeInMilliseconds());
EXPECT_EQ(kMaxBwePeriodMs,