tcp: fast retransmit pacing

[vpp.git] / src / vnet / tcp / tcp.h

diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h
index a036072..f7424c3 100644 (file)
--- a/src/vnet/tcp/tcp.h
+++ b/src/vnet/tcp/tcp.h
@@ -160,7 +160,7 @@ enum
 };
 
 #define TCP_SCOREBOARD_TRACE (0)
-#define TCP_MAX_SACK_BLOCKS 15 /**< Max number of SACK blocks stored */
+#define TCP_MAX_SACK_BLOCKS 256        /**< Max number of SACK blocks stored */
 #define TCP_INVALID_SACK_HOLE_INDEX ((u32)~0)
 
 typedef struct _scoreboard_trace_elt
@@ -319,8 +319,9 @@ typedef struct _tcp_connection
   u32 rto_boff;                /**< Index for RTO backoff */
   u32 srtt;            /**< Smoothed RTT */
   u32 rttvar;          /**< Smoothed mean RTT difference. Approximates variance */
-  u32 rtt_ts;          /**< Timestamp for tracked ACK */
   u32 rtt_seq;         /**< Sequence number for tracked ACK */
+  f64 rtt_ts;          /**< Timestamp for tracked ACK */
+  f64 mrtt_us;         /**< High precision mrtt from tracked acks */
 
   u16 mss;             /**< Our max seg size that includes options */
   u32 limited_transmit;        /**< snd_nxt when limited transmit starts */
@@ -389,6 +390,9 @@ typedef struct tcp_worker_ctx_
                                                     needing fast rxt */
   u32 *ongoing_fast_rxt;                       /**< vector of connections
                                                     now doing fast rxt */
+  u32 *postponed_fast_rxt;                     /**< vector of connections
+                                                    that will do fast rxt */
+  vlib_main_t *vm;                             /**< pointer to vm */
 
     CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
   u8 cached_opts[40];                          /**< cached 'on the wire'
@@ -444,6 +448,9 @@ typedef struct _tcp_main
   u32 last_v6_address_rotor;
   ip6_address_t *ip6_src_addresses;
 
+  /** Enable tx pacing for new connections */
+  u8 tx_pacing;
+
   u8 punt_unknown4;
   u8 punt_unknown6;
 
@@ -692,6 +699,12 @@ tcp_time_now (void)
   return tcp_main.wrk_ctx[vlib_get_thread_index ()].time_now;
 }
 
+always_inline f64
+tcp_time_now_us (u32 thread_index)
+{
+  return transport_time_now (thread_index);
+}
+
 always_inline u32
 tcp_set_time_now (u32 thread_index)
 {
@@ -706,6 +719,15 @@ void tcp_connection_timers_init (tcp_connection_t * tc);
 void tcp_connection_timers_reset (tcp_connection_t * tc);
 void tcp_init_snd_vars (tcp_connection_t * tc);
 void tcp_connection_init_vars (tcp_connection_t * tc);
+void tcp_update_pacer (tcp_connection_t * tc);
+
+always_inline void
+tcp_cc_rcv_ack (tcp_connection_t * tc)
+{
+  tc->cc_algo->rcv_ack (tc);
+  tc->tsecr_last_ack = tc->rcv_opts.tsecr;
+  tcp_update_pacer (tc);
+}
 
 always_inline void
 tcp_connection_force_ack (tcp_connection_t * tc, vlib_buffer_t * b)