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Code Activity

Stop tracking pure ack packets in Quic

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Summary:
Previously we track them since we thought we can get some additional
RTT samples. But these are bad RTT samples since peer can delays the acking of
pure acks. Now we no longer trust such RTT samples, there is no reason to keep
tracking pure ack packets.

Reviewed By: mjoras

Differential Revision: D18946081

fbshipit-source-id: 0a92d88e709edf8475d67791ba064c3e8b7f627a
This commit is contained in:
Yang Chi
2019-12-12 13:18:39 -08:00
committed by Facebook Github Bot
parent 734431011c
commit d7d19c74b5
24 changed files with 208 additions and 587 deletions
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24
quic/api/test/QuicTransportTest.cpp
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@@ -784,24 +784,7 @@ TEST_F(QuicTransportTest, WriteImmediateAcks) {
*headerCipher_,
transport_->getVersion(),
conn.transportSettings.writeConnectionDataPacketsLimit);
EXPECT_EQ(conn.outstandingPackets.size(), 1);
auto& packet =
getFirstOutstandingPacket(conn, PacketNumberSpace::AppData)->packet;
EXPECT_GE(packet.frames.size(), 1);
bool ackFound = false;
for (auto& frame : packet.frames) {
auto ackFrame = frame.asWriteAckFrame();
if (!ackFrame) {
continue;
}
EXPECT_EQ(ackFrame->ackBlocks.size(), 1);
EXPECT_EQ(start, ackFrame->ackBlocks.front().start);
EXPECT_EQ(end, ackFrame->ackBlocks.front().end);
ackFound = true;
}
EXPECT_TRUE(ackFound);
EXPECT_TRUE(conn.outstandingPackets.empty());
EXPECT_EQ(conn.ackStates.appDataAckState.largestAckScheduled, end);
EXPECT_FALSE(conn.ackStates.appDataAckState.needsToSendAckImmediately);
EXPECT_EQ(0, conn.ackStates.appDataAckState.numNonRxPacketsRecvd);
@@ -1044,7 +1027,6 @@ TEST_F(QuicTransportTest, ClonePathChallenge) {
auto& conn = transport_->getConnectionState();
// knock every handshake outstanding packets out
conn.outstandingHandshakePacketsCount = 0;
conn.outstandingPureAckPacketsCount = 0;
conn.outstandingPackets.clear();
conn.lossState.initialLossTime.clear();
conn.lossState.handshakeLossTime.clear();
@@ -1080,7 +1062,6 @@ TEST_F(QuicTransportTest, OnlyClonePathValidationIfOutstanding) {
auto& conn = transport_->getConnectionState();
// knock every handshake outstanding packets out
conn.outstandingHandshakePacketsCount = 0;
conn.outstandingPureAckPacketsCount = 0;
conn.outstandingPackets.clear();
conn.lossState.initialLossTime.clear();
conn.lossState.handshakeLossTime.clear();
@@ -1223,7 +1204,6 @@ TEST_F(QuicTransportTest, ClonePathResponse) {
auto& conn = transport_->getConnectionState();
// knock every handshake outstanding packets out
conn.outstandingHandshakePacketsCount = 0;
conn.outstandingPureAckPacketsCount = 0;
conn.outstandingPackets.clear();
conn.lossState.initialLossTime.clear();
conn.lossState.handshakeLossTime.clear();
@@ -1307,7 +1287,6 @@ TEST_F(QuicTransportTest, CloneNewConnectionIdFrame) {
auto& conn = transport_->getConnectionState();
// knock every handshake outstanding packets out
conn.outstandingHandshakePacketsCount = 0;
conn.outstandingPureAckPacketsCount = 0;
conn.outstandingPackets.clear();
conn.lossState.initialLossTime.clear();
conn.lossState.handshakeLossTime.clear();
@@ -1446,7 +1425,6 @@ TEST_F(QuicTransportTest, CloneRetireConnectionIdFrame) {
auto& conn = transport_->getConnectionState();
// knock every handshake outstanding packets out
conn.outstandingHandshakePacketsCount = 0;
conn.outstandingPureAckPacketsCount = 0;
conn.outstandingPackets.clear();
conn.lossState.initialLossTime.clear();
conn.lossState.handshakeLossTime.clear();