From owner-freebsd-stable@FreeBSD.ORG Tue Jul 12 06:42:50 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5A30716A41C; Tue, 12 Jul 2005 06:42:50 +0000 (GMT) (envelope-from rizzo@icir.org) Received: from xorpc.icir.org (xorpc.icir.org [192.150.187.68]) by mx1.FreeBSD.org (Postfix) with ESMTP id 062CC43D48; Tue, 12 Jul 2005 06:42:49 +0000 (GMT) (envelope-from rizzo@icir.org) Received: from xorpc.icir.org (localhost [127.0.0.1]) by xorpc.icir.org (8.12.11/8.12.11) with ESMTP id j6C6gGmh011057; Mon, 11 Jul 2005 23:42:16 -0700 (PDT) (envelope-from rizzo@xorpc.icir.org) Received: (from rizzo@localhost) by xorpc.icir.org (8.12.11/8.12.3/Submit) id j6C6gGTI011056; Mon, 11 Jul 2005 23:42:16 -0700 (PDT) (envelope-from rizzo) Date: Mon, 11 Jul 2005 23:42:16 -0700 From: Luigi Rizzo To: Danny Braniss Message-ID: <20050711234216.A11017@xorpc.icir.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: ; from danny@cs.huji.ac.il on Tue, Jul 12, 2005 at 09:21:13AM +0300 Cc: freebsd-net@freebsd.org, freebsd-stable@freebsd.org Subject: Re: tcp troughput weirdness X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Jul 2005 06:42:50 -0000 we need more data points - did you test tcp or udp ? who is sourcing data ? are the bandwidth symmetric (i.e. A-> same as B -> A ? cheers luigi On Tue, Jul 12, 2005 at 09:21:13AM +0300, Danny Braniss wrote: > while checking out the quality of a switch, I came about a very disturbing > dicovery: FreeBSD <-> Linux througput is MUCH better than FreeBSD <-> FreeBSD > > Setup: > 2 blades in the same bladeserver, A running FreeBSD 5.4, B running Linux > C is running FreeBSD 5.4 > all are connected at 1gb. > > A -+ (FreeBSD) > | > B -+ (Linux) > | > [switch] > | > +---- [router] --- C (FreeBSD) > A & B are on the same Vlan. > > iperf results: > Interval Transfer Bandwidth > > A <=> B 0.0-10.0 sec 1.09 GBytes 939 Mbits/sec > > A <=> C 0.0-10.0 sec 515 MBytes 432 Mbits/sec > > B <=> C 0.0-10.0 sec 1.07 GBytes 918 Mbits/sec > > I've run the tests several times, and the numbers are very similar, > so BIG Question: is there anything that can be tunned on the FreeBSD to > better the throughput? > > danny > > > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"