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Date: Wed, 20 May 2015 17:06:37 -0700 From: Rick Jones <rick.jones2@...com> To: Eric Dumazet <eric.dumazet@...il.com>, Marcelo Ricardo Leitner <mleitner@...hat.com> CC: Eric Dumazet <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>, netdev <netdev@...r.kernel.org>, Yuchung Cheng <ycheng@...gle.com>, Matt Mathis <mattmathis@...gle.com>, Craig Gallek <cgallek@...gle.com>, Martin Lau <kafai@...com>, Chris Rapier <rapier@....edu> Subject: Re: [PATCH net-next] tcp: add tcpi_segs_in and tcpi_segs_out to tcp_info On 05/20/2015 04:35 PM, Eric Dumazet wrote: > From: Marcelo Ricardo Leitner <mleitner@...hat.com> > > This patch tracks the total number of inbound and outbound segments on a > TCP socket. One may use this number to have an idea on connection > quality when compared against the retransmissions. > > RFC4898 named these : tcpEStatsPerfSegsIn and tcpEStatsPerfSegsOut > > These are a 32bit field each and can be fetched both from TCP_INFO > getsockopt() if one has a handle on a TCP socket, or from inet_diag > netlink facility (iproute2/ss patch will follow) I suppose it is far-fetched, but is it a concern that at 100 Gbit/s and 1500 byte MTU the 32 bit segment counter would wrap in something like 500 seconds and change? rick jones -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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