commit ae266340271d5badfa87c6ab6b2c335234893f11
author fayang <fayang@google.com> Mon Aug 05 12:19:59 2019 -0700
committer Copybara-Service <copybara-worker@google.com> Mon Aug 05 12:56:22 2019 -0700
tree b929af2d6dab7fbca6f7c23f4d8cfcce9dad8ce3
parent 6dde48a5e471dba627f96900c5b3bcee25085445

gfe-relnote: Let GFE be able to use LIFO write scheduler in QUIC and enable it via a connection option LIFO. Protected by gfe2_reloadable_flag_quic_use_lifo_write_scheduler.

PiperOrigin-RevId: 261741584
Change-Id: I2db660dd8a9e2eb40b70147ea829825a8f45404e

quic/core/quic_session.cc

diff --git a/quic/core/quic_session.cc b/quic/core/quic_session.cc
index e39fd41..fe65bc3 100644
--- a/quic/core/quic_session.cc
+++ b/quic/core/quic_session.cc
@@ -1014,6 +1014,14 @@
                 connection_->transport_version())) {
           QUIC_RELOADABLE_FLAG_COUNT(quic_enable_fifo_write_scheduler);
         }
+      } else if (GetQuicReloadableFlag(quic_enable_lifo_write_scheduler) &&
+                 ContainsQuicTag(config_.ReceivedConnectionOptions(), kLIFO)) {
+        // Enable LIFO write scheduler.
+        if (write_blocked_streams_.SwitchWriteScheduler(
+                spdy::WriteSchedulerType::LIFO,
+                connection_->transport_version())) {
+          QUIC_RELOADABLE_FLAG_COUNT(quic_enable_lifo_write_scheduler);
+        }
       }
     }