From owner-freebsd-stable Sun Nov 11 13:35:11 2001 Delivered-To: freebsd-stable@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by hub.freebsd.org (Postfix) with ESMTP id 08D5237B405; Sun, 11 Nov 2001 13:35:09 -0800 (PST) Received: (from dillon@localhost) by apollo.backplane.com (8.11.6/8.9.1) id fABLYXK47890; Sun, 11 Nov 2001 13:34:33 -0800 (PST) (envelope-from dillon) Date: Sun, 11 Nov 2001 13:34:33 -0800 (PST) From: Matthew Dillon Message-Id: <200111112134.fABLYXK47890@apollo.backplane.com> To: Nate Williams Cc: stable@FreeBSD.ORG, jayanth@FreeBSD.ORG Subject: Re: TCP NewReno causing wild performance fluctuations References: <15340.20191.441648.662113@caddis.yogotech.com> Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I think you should MFC this, Nate. -Matt Matthew Dillon :We've been using FreeBSD boxes as our reference ftp servers at work, and :because of the recent security issues, I've went through and updated a :number of our public boxes from 3.x -> 4.4. : :However, we're seeing significant variations in ftp throughput from :boxes that are directly connected on the lan segment. If I disable the :New Reno code, things go back to normal (ie; no fluctuations). : :I went through the logfiles, and it turns out there has been one fix to :the code that hasn't been merged into stable. : :Rev1.139 in tcp_input.c has not (yet) been merged into -stable. :... : :I hand-merged this change back onto my box, installed a new kernel, and :now in my *very* minor testing things appear to be more normal. My :question is should this fix be merged into stable, and would the lack of :this bugfix explain my performance results? : :Unfortunately, I don't haven't gotten any tcpdump outputs to analyze :what was going on, but I didn't want this bugfix to slip through the :cracks. : :Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message