commit 402103c13366ac8644a294d6701d7545c9d88979
author fayang <fayang@google.com> Fri Jan 10 13:36:24 2020 -0800
committer Copybara-Service <copybara-worker@google.com> Fri Jan 10 13:37:02 2020 -0800
tree b38712a08c15290341392ea2198170ff079ff3ec
parent 961eaa0f929484b1468f76dd46830b9ac6b618d2

gfe-relnote: Change cwnd bootstrapping UpAndDown experiment group IW to 10. Protected by existing gfe2_reloadable_flag_quic_bbr_mitigate_overly_large_bandwidth_sample.

PiperOrigin-RevId: 289155925
Change-Id: I9d75a9d0f7dd79d6e74b676ac95d9c0ef48b8bd4

quic/core/quic_sent_packet_manager.cc

diff --git a/quic/core/quic_sent_packet_manager.cc b/quic/core/quic_sent_packet_manager.cc
index 842e5e8..bcd7590 100644
--- a/quic/core/quic_sent_packet_manager.cc
+++ b/quic/core/quic_sent_packet_manager.cc
@@ -231,6 +231,11 @@
       send_algorithm_->SetInitialCongestionWindowInPackets(50);
     }
   }
+  if (GetQuicReloadableFlag(quic_bbr_mitigate_overly_large_bandwidth_sample) &&
+      config.HasClientRequestedIndependentOption(kBWS5, perspective)) {
+    initial_congestion_window_ = 10;
+    send_algorithm_->SetInitialCongestionWindowInPackets(10);
+  }
 
   using_pacing_ = !GetQuicFlag(FLAGS_quic_disable_pacing_for_perf_tests);
 

quic/core/quic_sent_packet_manager_test.cc

diff --git a/quic/core/quic_sent_packet_manager_test.cc b/quic/core/quic_sent_packet_manager_test.cc
index c08a517..86ee40a 100644
--- a/quic/core/quic_sent_packet_manager_test.cc
+++ b/quic/core/quic_sent_packet_manager_test.cc
@@ -3312,6 +3312,20 @@
             manager_.GetRetransmissionTime());
 }
 
+TEST_F(QuicSentPacketManagerTest, IW10ForUpAndDown) {
+  SetQuicReloadableFlag(quic_bbr_mitigate_overly_large_bandwidth_sample, true);
+  QuicConfig config;
+  QuicTagVector options;
+  options.push_back(kBWS5);
+  QuicConfigPeer::SetReceivedConnectionOptions(&config, options);
+  EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
+  EXPECT_CALL(*send_algorithm_, SetInitialCongestionWindowInPackets(10));
+  EXPECT_CALL(*network_change_visitor_, OnCongestionChange());
+  manager_.SetFromConfig(config);
+
+  EXPECT_EQ(10u, manager_.initial_congestion_window());
+}
+
 }  // namespace
 }  // namespace test
 }  // namespace quic