netdev - Re: Detecting TCP loss on the receiving side?

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Message-ID: <48766CF0.1020101@hp.com>
Date:	Thu, 10 Jul 2008 13:11:28 -0700
From:	Rick Jones <rick.jones2@...com>
To:	Dan Noé <dnoe@...ebrokerage.com>
CC:	netdev@...r.kernel.org
Subject: Re: Detecting TCP loss on the receiving side?

Dan Noé wrote:
> We're trying to troubleshoot some problems and we'd like to use the 
> struct tcp_info method to gain some information and attempt to detect 
> TCP loss events on the receiving side of a TCP stream.  The problem is 
> struct tcp_info is not well documented and my attempts to trace it seem 
> to reveal that most of the statistics are relevant to the sending side 
> of a TCP connection.
> 
> Are there any fields (or any other way) to easily detect loss events? 
> We're mostly concerned with detecting when TCP loss or reordering delays 
> things resulting in additional latency.

If this is just for troubleshooting, why not just take a tcpdump trace?

rick jones
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