From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: resurrecting tcphealth Date: Mon, 16 Jul 2012 13:46:25 +0200 Message-ID: <1342439185.23494.19.camel@edumazet-glaptop> References: <20120713165544.6767ea8f@nehalam.linuxnetplumber.net> <87741204cd72d363d54dadf9a94bb6fe.squirrel@webmail.univie.ac.at> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Piotr Sawuk Return-path: Received: from mail-ee0-f46.google.com ([74.125.83.46]:34067 "EHLO mail-ee0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752540Ab2GPLqa (ORCPT ); Mon, 16 Jul 2012 07:46:30 -0400 In-Reply-To: <87741204cd72d363d54dadf9a94bb6fe.squirrel@webmail.univie.ac.at> Sender: netdev-owner@vger.kernel.org List-ID: On Mon, 2012-07-16 at 13:33 +0200, Piotr Sawuk wrote: > On Sa, 14.07.2012, 01:55, Stephen Hemminger wrote: > > I am not sure if the is really necessary since the most > > of the stats are available elsewhere. > > if by "most" you mean address and port then you're right. > but even the rtt reported by "ss -i" seems to differ from tcphealth. Thats because tcphealth is wrong, it assumes HZ=1000 ? tp->srtt unit is jiffies, not ms. tcphealth is a gross hack.