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authorFlorin Coras <fcoras@cisco.com>2019-09-27 08:16:40 -0700
committerDave Barach <openvpp@barachs.net>2019-10-10 20:32:43 +0000
commitbe237bf02382854118986e8ea84c7544e42023f2 (patch)
tree85ef98b86f1a8949a54602c15b5510c7cccfda20 /src/vnet/tcp/tcp.c
parent5b1379be3e25df096d97dcd217965169fc6bb1b2 (diff)
tcp: retry lost retransmits
Add heuristic that detects lost retransmitted segments and retries sending them. Type: feature Change-Id: I34d1bb16799e1993779222eb2bfad4b40704159e Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/tcp/tcp.c')
-rw-r--r--src/vnet/tcp/tcp.c24
1 files changed, 17 insertions, 7 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index 5ffb1e27ab8..6ef03dc093d 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -915,17 +915,26 @@ static u8 *
format_tcp_congestion (u8 * s, va_list * args)
{
tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
- u32 indent = format_get_indent (s);
+ u32 indent = format_get_indent (s), prr_space = 0;
s = format (s, "%U ", format_tcp_congestion_status, tc);
s = format (s, "algo %s cwnd %u ssthresh %u bytes_acked %u\n",
tc->cc_algo->name, tc->cwnd, tc->ssthresh, tc->bytes_acked);
- s = format (s, "%Ucc space %u prev_cwnd %u prev_ssthresh %u rxt_bytes %u\n",
+ s = format (s, "%Ucc space %u prev_cwnd %u prev_ssthresh %u\n",
format_white_space, indent, tcp_available_cc_snd_space (tc),
- tc->prev_cwnd, tc->prev_ssthresh, tc->snd_rxt_bytes);
- s = format (s, "%Usnd_congestion %u dupack %u limited_transmit %u\n",
+ tc->prev_cwnd, tc->prev_ssthresh);
+ s = format (s, "%Usnd_cong %u dupack %u limited_tx %u\n",
format_white_space, indent, tc->snd_congestion - tc->iss,
tc->rcv_dupacks, tc->limited_transmit - tc->iss);
+ s = format (s, "%Urxt_bytes %u rxt_delivered %u rxt_head %u rxt_ts %u\n",
+ format_white_space, indent, tc->snd_rxt_bytes,
+ tc->rxt_delivered, tc->rxt_head - tc->iss,
+ tcp_time_now_w_thread (tc->c_thread_index) - tc->snd_rxt_ts);
+ if (tcp_in_fastrecovery (tc))
+ prr_space = tcp_fastrecovery_prr_snd_space (tc);
+ s = format (s, "%Uprr_start %u prr_delivered %u prr space %u\n",
+ format_white_space, indent, tc->prr_start - tc->iss,
+ tc->prr_delivered, prr_space);
return s;
}
@@ -1140,10 +1149,11 @@ format_tcp_scoreboard (u8 * s, va_list * args)
sack_scoreboard_hole_t *hole;
u32 indent = format_get_indent (s);
- s = format (s, "sacked %u last_sacked %u lost %u last_lost %u\n",
+ s = format (s, "sacked %u last_sacked %u lost %u last_lost %u"
+ " rxt_sacked %u\n",
sb->sacked_bytes, sb->last_sacked_bytes, sb->lost_bytes,
- sb->last_lost_bytes);
- s = format (s, "%Ulast_bytes_delivered %u high_sacked %u is_reneging %u\n",
+ sb->last_lost_bytes, sb->rxt_sacked);
+ s = format (s, "%Ulast_delivered %u high_sacked %u is_reneging %u\n",
format_white_space, indent, sb->last_bytes_delivered,
sb->high_sacked - tc->iss, sb->is_reneging);
s = format (s, "%Ucur_rxt_hole %u high_rxt %u rescue_rxt %u",