From owner-freebsd-hackers@FreeBSD.ORG Sat Sep 27 08:12:41 2008 Return-Path: Delivered-To: freebsd-hackers@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 83D43106569C; Sat, 27 Sep 2008 08:12:41 +0000 (UTC) (envelope-from danny@cs.huji.ac.il) Received: from cs1.cs.huji.ac.il (cs1.cs.huji.ac.il [132.65.16.10]) by mx1.freebsd.org (Postfix) with ESMTP id 36FAD8FC17; Sat, 27 Sep 2008 08:12:41 +0000 (UTC) (envelope-from danny@cs.huji.ac.il) Received: from pampa.cs.huji.ac.il ([132.65.80.32]) by cs1.cs.huji.ac.il with esmtp id 1KjUur-0006DE-GA; Sat, 27 Sep 2008 11:12:37 +0300 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: "Kevin Oberman" In-reply-to: <20080926221700.1C4AE4500E@ptavv.es.net> References: <20080926221700.1C4AE4500E@ptavv.es.net> Comments: In-reply-to "Kevin Oberman" message dated "Fri, 26 Sep 2008 15:17:00 -0700." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sat, 27 Sep 2008 11:12:37 +0300 From: Danny Braniss Message-ID: Cc: David Malone , freebsd-hackers@FreeBSD.org, Jeremy Chadwick , freebsd-stable@FreeBSD.org Subject: Re: bad NFS/UDP performance X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Sep 2008 08:12:41 -0000 > --==_Exmh_1222467420_5817P > Content-Type: text/plain; charset=us-ascii > Content-Disposition: inline > > David, > > You beat me to it. > > Danny, read the iperf man page: > -b, --bandwidth n[KM] > set target bandwidth to n bits/sec (default 1 Mbit/sec). This > setting requires UDP (-u). > > The page needs updating, though. It should read "-b, --bandwidth > n[KMG]. It also does NOT require -u. If you use -b, UDP is assumed. I did RTFM(*), but when i tried it just wouldn't work, I tried today and it's actually working - so don't RTFM before coffee! btw, even though iperf sucks, netperf udp tends to bring the server down to it's knees. danny PS: * - i don't seem to have the iperf man, all I have is iperf -h