netdev - Re: [PATCH iproute2] ss: add support for segs_in and segs

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Date:	Tue, 26 May 2015 16:01:01 -0300
From:	Marcelo Ricardo Leitner <mleitner@...hat.com>
To:	Craig Gallek <kraig@...gle.com>
Cc:	Stephen Hemminger <stephen@...workplumber.org>,
	edumazet@...gle.com, netdev@...r.kernel.org
Subject: Re: [PATCH iproute2] ss: add support for segs_in and segs_out

On Tue, May 26, 2015 at 02:54:41PM -0400, Craig Gallek wrote:
> Two new tcp_info fields: tcpi_segs_in and tcpi_segs_out.
> (2efd055c53c06b7e89c167c98069bab9afce7e59)
> 
> ~: ss -ti src :22
> 	 cubic wscale:7,6 rto:201 rtt:0.244/0.012 ato:40 mss:1418 cwnd:21 bytes_acked:80605 bytes_received:20491 segs_out:414 segs_in:600 send 976.3Mbps lastsnd:23 lastrcv:23 lastack:22 pacing_rate 1952.7Mbps rcv_rtt:98 rcv_space:28960
> 
> Signed-off-by: Craig Gallek <kraig@...gle.com>

Cool, thanks Craig.

Reviewed-by: Marcelo Ricardo Leitner <mleitner@...hat.com>

> ---
>  include/linux/tcp.h | 4 +++-
>  misc/ss.c           | 8 ++++++++
>  2 files changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/include/linux/tcp.h b/include/linux/tcp.h
> index 8b17cff..1e9b4a6 100644
> --- a/include/linux/tcp.h
> +++ b/include/linux/tcp.h
> @@ -192,8 +192,10 @@ struct tcp_info {
>  
>  	__u64	tcpi_pacing_rate;
>  	__u64	tcpi_max_pacing_rate;
> -	__u64	tcpi_bytes_acked; /* RFC4898 tcpEStatsAppHCThruOctetsAcked */
> +	__u64	tcpi_bytes_acked;    /* RFC4898 tcpEStatsAppHCThruOctetsAcked */
>  	__u64	tcpi_bytes_received; /* RFC4898 tcpEStatsAppHCThruOctetsReceived */
> +	__u32	tcpi_segs_out;	     /* RFC4898 tcpEStatsPerfSegsOut */
> +	__u32	tcpi_segs_in;	     /* RFC4898 tcpEStatsPerfSegsIn */
>  };
>  
>  /* for TCP_MD5SIG socket option */
> diff --git a/misc/ss.c b/misc/ss.c
> index dba0901..3e01f88 100644
> --- a/misc/ss.c
> +++ b/misc/ss.c
> @@ -769,6 +769,8 @@ struct tcpstat
>  	double		    pacing_rate_max;
>  	unsigned long long  bytes_acked;
>  	unsigned long long  bytes_received;
> +	unsigned int	    segs_out;
> +	unsigned int	    segs_in;
>  	unsigned int	    unacked;
>  	unsigned int	    retrans;
>  	unsigned int	    retrans_total;
> @@ -1695,6 +1697,10 @@ static void tcp_stats_print(struct tcpstat *s)
>  		printf(" bytes_acked:%llu", s->bytes_acked);
>  	if (s->bytes_received)
>  		printf(" bytes_received:%llu", s->bytes_received);
> +	if (s->segs_out)
> +		printf(" segs_out:%u", s->segs_out);
> +	if (s->segs_in)
> +		printf(" segs_in:%u", s->segs_in);
>  
>  	if (s->dctcp && s->dctcp->enabled) {
>  		struct dctcpstat *dctcp = s->dctcp;
> @@ -1990,6 +1996,8 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
>  		}
>  		s.bytes_acked = info->tcpi_bytes_acked;
>  		s.bytes_received = info->tcpi_bytes_received;
> +		s.segs_out = info->tcpi_segs_out;
> +		s.segs_in = info->tcpi_segs_in;
>  		tcp_stats_print(&s);
>  		if (s.dctcp)
>  			free(s.dctcp);
> -- 
> 2.2.0.rc0.207.ga3a616c
> 
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