tcp: time infra improvements

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I998c0686f9f7dc556dda8b28e23bbed127d0aafc
diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h
index 2725c1f..418bc47 100644
--- a/src/vnet/tcp/tcp.h
+++ b/src/vnet/tcp/tcp.h
@@ -91,15 +91,15 @@
   /** convenience pointer to this thread's vlib main */
   vlib_main_t *vm;
 
+  /** Time used for high precision (us) measurements in seconds */
+  f64 time_us;
+
   /** Time measured in @ref TCP_TSTAMP_TICK used for time stamps */
-  u32 time_now;
+  u32 time_tstamp;
 
   /* Max timers to be handled per dispatch loop */
   u32 max_timers_per_loop;
 
-  /** Session layer edge indices to tcp output */
-  u32 tco_next_node[2];
-
   /* Fifo of pending timer expirations */
   u32 *pending_timers;
 
@@ -114,6 +114,9 @@
   /* fifo of pending free requests */
   tcp_cleanup_req_t *pending_cleanups;
 
+  /** Session layer edge indices to tcp output */
+  u32 tco_next_node[2];
+
   /** worker timer wheel */
   tcp_timer_wheel_t timer_wheel;