commit 14650e49062ef18f5385038fb5675c5d599e6f61
author fayang <fayang@google.com> Tue Jun 04 10:30:33 2019 -0700
committer Copybara-Service <copybara-worker@google.com> Wed Jun 05 21:17:23 2019 -0700
tree e724a6f3d09452e5376e8e73ca0d1130cc5ecce7
parent 8cafde0587307dcd0a62df61d389263e60c85a06

gfe-relnote: In QUIC, add code counts for RTT status when cwnd gets bootstrapped. Not protected.

PiperOrigin-RevId: 251465876
Change-Id: I465323d7d0fd95f9266f8837055f951e1fec2c72

quic/core/congestion_control/bbr_sender.cc

diff --git a/quic/core/congestion_control/bbr_sender.cc b/quic/core/congestion_control/bbr_sender.cc
index 39fecda..aa81d5a 100644
--- a/quic/core/congestion_control/bbr_sender.cc
+++ b/quic/core/congestion_control/bbr_sender.cc
@@ -358,6 +358,14 @@
         std::max(kMinInitialCongestionWindow * kDefaultTCPMSS,
                  std::min(kMaxInitialCongestionWindow * kDefaultTCPMSS,
                           bandwidth * rtt_stats_->SmoothedOrInitialRtt()));
+    if (!rtt_stats_->smoothed_rtt().IsZero()) {
+      QUIC_CODE_COUNT(quic_smoothed_rtt_available);
+    } else if (rtt_stats_->initial_rtt() !=
+               QuicTime::Delta::FromMilliseconds(kInitialRttMs)) {
+      QUIC_CODE_COUNT(quic_client_initial_rtt_available);
+    } else {
+      QUIC_CODE_COUNT(quic_default_initial_rtt);
+    }
     if (new_cwnd > congestion_window_) {
       QUIC_RELOADABLE_FLAG_COUNT_N(quic_fix_bbr_cwnd_in_bandwidth_resumption, 1,
                                    3);