From owner-freebsd-current Mon Dec 18 20:52:19 2000 From owner-freebsd-current@FreeBSD.ORG Mon Dec 18 20:52:17 2000 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mta03.mail.mel.aone.net.au (mta03.mail.au.uu.net [203.2.192.83]) by hub.freebsd.org (Postfix) with ESMTP id B821537B400 for ; Mon, 18 Dec 2000 20:52:16 -0800 (PST) Received: from camtech.net.au ([203.28.1.144]) by mta03.mail.mel.aone.net.au with ESMTP id <20001219045214.TWZO4972.mta03.mail.mel.aone.net.au@camtech.net.au>; Tue, 19 Dec 2000 15:52:14 +1100 Sender: me@FreeBSD.ORG Message-ID: <3A3EEA08.E63EC165@camtech.net.au> Date: Tue, 19 Dec 2000 15:24:32 +1030 From: Matthew Thyer X-Mailer: Mozilla 4.76 [en] (X11; U; FreeBSD 5.0-CURRENT i386) X-Accept-Language: en MIME-Version: 1.0 To: Michael Class Cc: current@freebsd.org Subject: Re: Network performance-problem References: <3A3DDDC7.6F2540B7@hp.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Michael Class wrote: > > Hello, > > i am seeing a problem with 5.0-current (from 14.12.00) and a 3COM > 3CCFE575CT Lancard (pc-cardbus) using the xl-driver. [snip] > Why behaves my FreeBSD-machines worse then the other boxes? Any Ideas? Make sure you are running with the TCP/IP NewReno optimisation turned off. There are bugs in the TCP/IP NewReno code that result in bad packets and hence lots of retransmission with generally reduced network performance. I think its meant to be the default now in -CURRENT (to have NewReno off) but I'm not sure if PHK has disabled it yet. $ cat /usr/local/etc/rc.d/nonewreno.sh #!/bin/sh sysctl -w net.inet.tcp.newreno=0 echo -n " no_newreno" $ sysctl net.inet.tcp.newreno net.inet.tcp.newreno: 0 One day hopefully NewReno may be fixed as it sounded worthwhile. See Poul's messages in the freebsd-current archives. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message