netdev - Re: [PATCH v2 net-next 2/2] tcp: add TCPWinProbe and TCPKeepAlive SNMP counters

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Message-ID: <CADVnQym=zqae9J5wWbwFT_1hRR9BL_65NjrT_L+ArA=0K9BfUQ@mail.gmail.com>
Date:	Wed, 6 May 2015 18:12:48 -0400
From:	Neal Cardwell <ncardwell@...gle.com>
To:	Eric Dumazet <edumazet@...gle.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Yuchung Cheng <ycheng@...gle.com>,
	Nandita Dukkipati <nanditad@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH v2 net-next 2/2] tcp: add TCPWinProbe and TCPKeepAlive
 SNMP counters

On Wed, May 6, 2015 at 5:26 PM, Eric Dumazet <edumazet@...gle.com> wrote:
> Diagnosing problems related to Window Probes has been hard because
> we lack a counter.
>
> TCPWinProbe counts the number of ACK packets a sender has to send
> at regular intervals to make sure a reverse ACK packet opening back
> a window had not been lost.
>
> TCPKeepAlive counts the number of ACK packets sent to keep TCP
> flows alive (SO_KEEPALIVE)
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Signed-off-by: Yuchung Cheng <ycheng@...gle.com>
> ---
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