1 files changed, 16 insertions, 0 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index 5090b7dd2d7..ad9bbff5c0e 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -1177,6 +1177,17 @@ tcp_half_open_session_get_transport (u32 conn_index)
   return &tc->connection;
 }
 
+static u16
+tcp_session_cal_goal_size (tcp_connection_t * tc)
+{
+  u16 goal_size = tc->snd_mss;
+
+  goal_size = TCP_MAX_GSO_SZ - tc->snd_mss % TCP_MAX_GSO_SZ;
+  goal_size = clib_min (goal_size, tc->snd_wnd / 2);
+
+  return goal_size;
+}
+
 /**
  * Compute maximum segment size for session layer.
  *
@@ -1194,6 +1205,11 @@ tcp_session_send_mss (transport_connection_t * trans_conn)
    * the current state of the connection. */
   tcp_update_burst_snd_vars (tc);
 
+  if (PREDICT_FALSE (tc->is_tso))
+    {
+      return tcp_session_cal_goal_size (tc);
+    }
+
   return tc->snd_mss;
 }