netdev - Re: [PATCH v2 net-next] tcp: snmp stats for Fast Open, SYN rtx, and data pkts

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Date:	Mon, 03 Mar 2014 15:58:24 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	ycheng@...gle.com
Cc:	netdev@...r.kernel.org, edumazet@...gle.com, nanditad@...gle.com,
	brakmo@...gle.com
Subject: Re: [PATCH v2 net-next] tcp: snmp stats for Fast Open, SYN rtx,
 and data pkts

From: Yuchung Cheng <ycheng@...gle.com>
Date: Mon,  3 Mar 2014 12:31:36 -0800

> 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: Nandita Dukkipati <nanditad@...gle.com>
> Signed-off-by: Lawrence Brakmo <brakmo@...gle.com>

Applied, thank you.
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