netdev - Re: [PATCH net-next] tcp: snmp stats for Fast Open, SYN rtx, and data pkts

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Message-ID: <1393632473.26794.90.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Fri, 28 Feb 2014 16:07:53 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Yuchung Cheng <ycheng@...gle.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	Eric Dumazet <edumazet@...gle.com>,
	Nandits Dukkipati <nanditad@...gle.com>,
	Larry Brakmo <brakmo@...gle.com>
Subject: Re: [PATCH net-next] tcp: snmp stats for Fast Open, SYN rtx, and
 data pkts

On Fri, 2014-02-28 at 14:47 -0800, Yuchung Cheng wrote:
> Add the following snmp stats:
> 
> TCPFastOpenActiveFail: Fast Open attempts (SYN/data) failed beacuse
> the remote does not accept it or the attempts timed out.
> 
> TCPSynRetrans: number of SYN and SYN/ACK retransmits to break down
> retransmissions into SYN, fast-retransmits, timeout retransmits, etc.
> 
> TCPOrigDataSent: number of outgoing packets with original data (excluding
> retransmission but including data-in-SYN). This counter is different from
> TcpOutSegs because TcpOutSegs also tracks pure ACKs. TCPOrigDataSent is
> more useful to track the TCP retransmission rate.
> 
> Change TCPFastOpenActive to track only successful Fast Opens to be symmetric to
> TCPFastOpenPassive.
> 
> Signed-off-by: Yuchung Cheng <ycheng@...gle.com>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Signed-off-by: Nandits Dukkipati <nanditad@...gle.com>

s/Nandits/Nandita/

> Signed-off-by: Larry Brakmo <brakmo@...gle.com>
> ---



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