From 7b135c639e7d8144859258700700112d0c61f8c1 Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Fri, 27 Sep 2019 08:16:40 -0700 Subject: 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 (cherry picked from commit be237bf02382854118986e8ea84c7544e42023f2) --- src/vnet/tcp/tcp.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) (limited to 'src/vnet/tcp/tcp.c') 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", -- cgit 1.2.3-korg