tcp: use 100us timer resolution

Experimental reduction of tcp timer resolution from 100ms that
allows for finer grained timers, if needed. Please report
issues if any encountered.

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I4050f7691aa7365b77298b4427408a4a447834fa

diff --git a/src/vnet/tcp/tcp_types.h b/src/vnet/tcp/tcp_types.h
index 0ffc036..c476431 100644 (file)
--- a/src/vnet/tcp/tcp_types.h
+++ b/src/vnet/tcp/tcp_types.h
@@ -79,8 +79,8 @@ typedef enum _tcp_timers
 
 #define TCP_TIMER_HANDLE_INVALID ((u32) ~0)
 
-#define TCP_TIMER_TICK         0.1             /**< Timer tick in seconds */
-#define TCP_TO_TIMER_TICK       TCP_TICK*10    /**< Factor for converting
+#define TCP_TIMER_TICK         0.0001          /**< Timer tick in seconds */
+#define TCP_TO_TIMER_TICK       TCP_TICK*10000 /**< Factor for converting
                                                     ticks to timer ticks */
 
 #define TCP_RTO_MAX 60 * THZ   /* Min max RTO (60s) as per RFC6298 */
@@ -463,8 +463,8 @@ tcp_get_connection_from_transport (transport_connection_t * tconn)
 #undef TW_START_STOP_TRACE_SIZE
 
 #define TW_TIMER_WHEELS 2
-#define TW_SLOTS_PER_RING 512
-#define TW_RING_SHIFT 9
+#define TW_SLOTS_PER_RING 1024
+#define TW_RING_SHIFT 10
 #define TW_RING_MASK (TW_SLOTS_PER_RING -1)
 #define TW_TIMERS_PER_OBJECT 16
 #define LOG2_TW_TIMERS_PER_OBJECT 4