tcp/session: tx optimizations

- cache and reuse tcp options and rcv_wnd for session layer tx bursts
- avoid reading/setting total_length_not_including_first_buffer. It's
part of a buffer's second cache line so it comes at a "cost".

Change-Id: Id18219c2f7e07cf4c63ee74f9cdd9e5918904036
Signed-off-by: Florin Coras <fcoras@cisco.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index cca9f1c5c90..45eaf016b1e 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -984,7 +984,7 @@ tcp_session_send_mss (transport_connection_t * trans_conn)
   /* Ensure snd_mss does accurately reflect the amount of data we can push
    * in a segment. This also makes sure that options are updated according to
    * the current state of the connection. */
-  tcp_update_snd_mss (tc);
+  tcp_update_burst_snd_vars (tc);
 
   return tc->snd_mss;
 }