diff options
| author |   Florin Coras <fcoras@cisco.com> | 2018-10-31 23:09:22 -0700 |
|---|---|---|
| committer |   Dave Barach <openvpp@barachs.net> | 2018-11-01 20:43:29 +0000 |
| commit | e55a6d7a97044c2f4fd0231242e062924d75c7b6 (patch) | |
| tree | ae58b4562748db8397604029261008b94aaecd8c /src/vnet/tcp/tcp_output.c | |
| parent | f6c68d74eca9038516986254846de60a4f7c02ae (diff) | |
tcp: fast retransmit pacing
Force pacing for fast retransmit to avoid bursts of retransmitted
packets.
Change-Id: I2ff42c328899b36322c4de557b1f7d853dba8fe2
Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/tcp/tcp_output.c')
| -rw-r--r-- | src/vnet/tcp/tcp_output.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c index f14a61263d4..81579ef96a2 100644 --- a/src/vnet/tcp/tcp_output.c +++ b/src/vnet/tcp/tcp_output.c @@ -1452,10 +1452,10 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) tc->timers[TCP_TIMER_RETRANSMIT] = TCP_TIMER_HANDLE_INVALID; } - TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 1); - if (tc->state >= TCP_STATE_ESTABLISHED) { + TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 2); + /* Lost FIN, retransmit and return */ if (tcp_is_lost_fin (tc)) { @@ -1536,6 +1536,8 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) return; } + TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 2); + /* Try without increasing RTO a number of times. If this fails, * start growing RTO exponentially */ tc->rto_boff += 1; @@ -1562,6 +1564,8 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) /* Retransmit SYN-ACK */ else if (tc->state == TCP_STATE_SYN_RCVD) { + TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 2); + tc->rto_boff += 1; if (tc->rto_boff > TCP_RTO_SYN_RETRIES) tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX); @@ -1693,7 +1697,7 @@ tcp_retransmit_first_unacked (tcp_connection_t * tc) old_snd_nxt = tc->snd_nxt; tc->snd_nxt = tc->snd_una; - TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 2); + TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 1); n_bytes = tcp_prepare_retransmit_segment (tc, 0, tc->snd_mss, &b); if (!n_bytes) |