gfe-relnote: In QUIC, add code counts for RTT status when cwnd gets bootstrapped. Not protected.
PiperOrigin-RevId: 251465876
Change-Id: I465323d7d0fd95f9266f8837055f951e1fec2c72
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);
diff --git a/quic/core/congestion_control/rtt_stats.cc b/quic/core/congestion_control/rtt_stats.cc
index e1a6372..40b4bcc 100644
--- a/quic/core/congestion_control/rtt_stats.cc
+++ b/quic/core/congestion_control/rtt_stats.cc
@@ -14,8 +14,6 @@
namespace {
-// Default initial rtt used before any samples are received.
-const int kInitialRttMs = 100;
const float kAlpha = 0.125f;
const float kOneMinusAlpha = (1 - kAlpha);
const float kBeta = 0.25f;
diff --git a/quic/core/quic_constants.h b/quic/core/quic_constants.h
index caac2c7..913c063 100644
--- a/quic/core/quic_constants.h
+++ b/quic/core/quic_constants.h
@@ -236,6 +236,9 @@
// Maximum length allowed for the token in a NEW_TOKEN frame.
const size_t kMaxNewTokenTokenLength = 0xffff;
+// Default initial rtt used before any samples are received.
+const int kInitialRttMs = 100;
+
// Packet number of first sending packet of a connection. Please note, this
// cannot be used as first received packet because peer can choose its starting
// packet number.
