From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: Detecting TCP loss on the receiving side? Date: Thu, 10 Jul 2008 13:11:28 -0700 Message-ID: <48766CF0.1020101@hp.com> References: <4876668C.8040108@limebrokerage.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org To: =?ISO-8859-1?Q?Dan_No=E9?= Return-path: Received: from g5t0007.atlanta.hp.com ([15.192.0.44]:18189 "EHLO g5t0007.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751188AbYGJULb (ORCPT ); Thu, 10 Jul 2008 16:11:31 -0400 In-Reply-To: <4876668C.8040108@limebrokerage.com> Sender: netdev-owner@vger.kernel.org List-ID: Dan No=E9 wrote: > We're trying to troubleshoot some problems and we'd like to use the=20 > struct tcp_info method to gain some information and attempt to detect= =20 > TCP loss events on the receiving side of a TCP stream. The problem i= s=20 > struct tcp_info is not well documented and my attempts to trace it se= em=20 > to reveal that most of the statistics are relevant to the sending sid= e=20 > of a TCP connection. >=20 > Are there any fields (or any other way) to easily detect loss events?= =20 > We're mostly concerned with detecting when TCP loss or reordering del= ays=20 > things resulting in additional latency. If this is just for troubleshooting, why not just take a tcpdump trace? rick jones