From owner-freebsd-hackers Sun Dec 2 20:51:38 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from iguana.aciri.org (iguana.aciri.org [192.150.187.36]) by hub.freebsd.org (Postfix) with ESMTP id AD0F937B417 for ; Sun, 2 Dec 2001 20:51:34 -0800 (PST) Received: (from rizzo@localhost) by iguana.aciri.org (8.11.3/8.11.1) id fB34l2v54179; Sun, 2 Dec 2001 20:47:02 -0800 (PST) (envelope-from rizzo) Date: Sun, 2 Dec 2001 20:47:02 -0800 From: Luigi Rizzo To: Matthew Dillon Cc: Richard Sharpe , freebsd-hackers@FreeBSD.ORG Subject: Re: Patch #3 (TCP / Linux / Performance) Message-ID: <20011202204702.A54149@iguana.aciri.org> References: <20011128153817.T61580@monorchid.lemis.com> <15364.38174.938500.946169@caddis.yogotech.com> <20011128104629.A43642@walton.maths.tcd.ie> <5.1.0.14.1.20011130181236.00a80160@postamt1.charite.de> <200111302047.fAUKlT811090@apollo.backplane.com> <200111302130.fAULUU324648@apollo.backplane.com> <3C08CF9D.2030109@ns.aus.com> <200112012138.fB1LcG837063@apollo.backplane.com> <200112020810.fB28Arr77757@apollo.backplane.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200112020810.fB28Arr77757@apollo.backplane.com> User-Agent: Mutt/1.3.23i Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sun, Dec 02, 2001 at 12:10:53AM -0800, Matthew Dillon wrote: ... > There are still a couple of unresolved issues. I noticed that when > connecting locally TCP is non-optimal... when sending a 4100 byte > data block it sends two 1460 byte packets (maxseg), then one > 1176 byte packet and one 4 byte packet. The 1176 byte packet is curious, as the loopback's MTU is normally 16384. Also, any idea on where does the 4096 limit (1460*2+1176) come from ? cheers luigi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message