From: Florin Coras <fcoras@cisco.com>
Date: Fri, 7 Dec 2018 01:41:10 +0000 (-0800)
Subject: tcp: measure us rtt with syn-ack
X-Git-Tag: v19.04-rc0~207
X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commitdiff_plain;h=df0847831715ef0f639a6d8e79468cd1e2341cd6

tcp: measure us rtt with syn-ack

Change-Id: I20820145377060e12aeeb23b433206c79fd88332
Signed-off-by: Florin Coras <fcoras@cisco.com>
---

diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 0cf7fa95f8f..74fc15fe6cc 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -1021,6 +1021,7 @@ tcp_send_synack (tcp_connection_t * tc)
   if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi)))
     return;
 
+  tc->rtt_ts = tcp_time_now_us (tc->c_thread_index);
   b = vlib_get_buffer (vm, bi);
   tcp_make_synack (tc, b);
   tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4);