tcp: dequeue acked only once per burst
Avoid dequeuing acked bytes more than once per burst for a connection.
Although the fifos do not use locks, size decrements are atomic, so they
rely on locked instructions.
Change-Id: Id65f4ea40b2c10057461402dfd0393034e6472d5
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h
index bd5e4f7..480b924 100644
--- a/src/vnet/tcp/tcp.h
+++ b/src/vnet/tcp/tcp.h
@@ -122,6 +122,7 @@
_(FINPNDG, "FIN pending") \
_(FRXT_PENDING, "Fast-retransmit pending") \
_(FRXT_FIRST, "Fast-retransmit first again") \
+ _(DEQ_PENDING, "Pending dequeue acked") \
typedef enum _tcp_connection_flag_bits
{
@@ -308,6 +309,7 @@
u32 prev_ssthresh; /**< ssthresh before congestion */
u32 prev_cwnd; /**< ssthresh before congestion */
u32 bytes_acked; /**< Bytes acknowledged by current segment */
+ u32 burst_acked; /**< Bytes acknowledged in current burst */
u32 snd_rxt_bytes; /**< Retransmitted bytes */
u32 snd_rxt_ts; /**< Timestamp when first packet is retransmitted */
u32 tsecr_last_ack; /**< Timestamp echoed to us in last healthy ACK */
@@ -392,6 +394,7 @@
now doing fast rxt */
u32 *postponed_fast_rxt; /**< vector of connections
that will do fast rxt */
+ u32 *pending_deq_acked;
vlib_main_t *vm; /**< pointer to vm */
CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);