netdev - Re: [PATCH iproute2] ss: add support for bytes_sent, bytes_retrans, dsack_dups and reord

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Date:   Thu, 29 Nov 2018 09:47:42 -0800
From:   Wei Wang <weiwan@...gle.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     David Ahern <dsahern@...il.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>
Subject: Re: [PATCH iproute2] ss: add support for bytes_sent, bytes_retrans,
 dsack_dups and reord_seen

On Thu, Nov 29, 2018 at 2:28 AM Eric Dumazet <edumazet@...gle.com> wrote:
>
> Wei Wang added these fields in linux-4.19
>
> Tested:
>
> ss -ti ...
>
>         ts sack cubic wscale:8,8 rto:7 rtt:2.678/0.267 mss:1428 pmtu:1500
>     rcvmss:536 advmss:1428 cwnd:91 ssthresh:65
> (*) bytes_sent:17470606104 bytes_retrans:2856
>     bytes_acked:17470483297
>     segs_out:12234320 segs_in:622983
>     data_segs_out:12234318 send 388.2Mbps lastrcv:986784 lastack:1
>     pacing_rate 465.8Mbps delivery_rate 162.7Mbps
>     delivered:12234235 delivered_ce:3669056
>     busy:986784ms unacked:84 retrans:0/2
> (*) dsack_dups:2
>     rcv_space:14280 rcv_ssthresh:65535 notsent:2016336 minrtt:0.183
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Wei Wang <weiwan@...gle.com>
> Cc: Yuchung Cheng <ycheng@...gle.com>
> Cc: Neal Cardwell <ncardwell@...gle.com>
> Cc: Soheil Hassas Yeganeh <soheil@...gle.com>
> ---

Acked-by: Wei Wang <weiwan@...gle.com>

Thanks Eric.

>
>  misc/ss.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/misc/ss.c b/misc/ss.c
> index 3aa94f235085512510dca9fd597e8e37aaaf0fd3..3589ebedc5a0ab0615ba56f3df10d49198bed0d9 100644
> --- a/misc/ss.c
> +++ b/misc/ss.c
> @@ -819,6 +819,8 @@ struct tcpstat {
>         unsigned int        not_sent;
>         unsigned int        delivered;
>         unsigned int        delivered_ce;
> +       unsigned int        dsack_dups;
> +       unsigned int        reord_seen;
>         double              rcv_rtt;
>         double              min_rtt;
>         int                 rcv_space;
> @@ -826,6 +828,8 @@ struct tcpstat {
>         unsigned long long  busy_time;
>         unsigned long long  rwnd_limited;
>         unsigned long long  sndbuf_limited;
> +       unsigned long long  bytes_sent;
> +       unsigned long long  bytes_retrans;
>         bool                has_ts_opt;
>         bool                has_sack_opt;
>         bool                has_ecn_opt;
> @@ -2426,6 +2430,10 @@ static void tcp_stats_print(struct tcpstat *s)
>         if (s->ssthresh)
>                 out(" ssthresh:%d", s->ssthresh);
>
> +       if (s->bytes_sent)
> +               out(" bytes_sent:%llu", s->bytes_sent);
> +       if (s->bytes_retrans)
> +               out(" bytes_retrans:%llu", s->bytes_retrans);
>         if (s->bytes_acked)
>                 out(" bytes_acked:%llu", s->bytes_acked);
>         if (s->bytes_received)
> @@ -2512,10 +2520,14 @@ static void tcp_stats_print(struct tcpstat *s)
>                 out(" lost:%u", s->lost);
>         if (s->sacked && s->ss.state != SS_LISTEN)
>                 out(" sacked:%u", s->sacked);
> +       if (s->dsack_dups)
> +               out(" dsack_dups:%u", s->dsack_dups);
>         if (s->fackets)
>                 out(" fackets:%u", s->fackets);
>         if (s->reordering != 3)
>                 out(" reordering:%d", s->reordering);
> +       if (s->reord_seen)
> +               out(" reord_seen:%d", s->reord_seen);
>         if (s->rcv_rtt)
>                 out(" rcv_rtt:%g", s->rcv_rtt);
>         if (s->rcv_space)
> @@ -2837,6 +2849,10 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
>                 s.sndbuf_limited = info->tcpi_sndbuf_limited;
>                 s.delivered = info->tcpi_delivered;
>                 s.delivered_ce = info->tcpi_delivered_ce;
> +               s.dsack_dups = info->tcpi_dsack_dups;
> +               s.reord_seen = info->tcpi_reord_seen;
> +               s.bytes_sent = info->tcpi_bytes_sent;
> +               s.bytes_retrans = info->tcpi_bytes_retrans;
>                 tcp_stats_print(&s);
>                 free(s.dctcp);
>                 free(s.bbr_info);
> --
> 2.20.0.rc0.387.gc7a69e6b6c-goog
>