From owner-freebsd-net@FreeBSD.ORG  Mon Feb 10 23:30:21 2014
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 8B28C87C
 for <freebsd-net@freebsd.org>; Mon, 10 Feb 2014 23:30:21 +0000 (UTC)
Received: from mail-in-09.arcor-online.net (mail-in-09.arcor-online.net
 [151.189.21.49])
 (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id 3EEAA15ED
 for <freebsd-net@freebsd.org>; Mon, 10 Feb 2014 23:30:21 +0000 (UTC)
Received: from mail-in-05-z2.arcor-online.net (mail-in-05-z2.arcor-online.net
 [151.189.8.17]) by mx.arcor.de (Postfix) with ESMTP id 2019F197AE3;
 Tue, 11 Feb 2014 00:30:02 +0100 (CET)
Received: from mail-in-08.arcor-online.net (mail-in-08.arcor-online.net
 [151.189.21.48])
 by mail-in-05-z2.arcor-online.net (Postfix) with ESMTP id 080DA6F2503;
 Tue, 11 Feb 2014 00:30:03 +0100 (CET)
X-Greylist: Passed host: 188.105.84.234
X-DKIM: Sendmail DKIM Filter v2.8.2 mail-in-08.arcor-online.net D0ED43AF011
X-Greylist: Passed host: 188.105.84.234
Received: from lorvorc.mips.inka.de (dslb-188-105-084-234.pools.arcor-ip.net
 [188.105.84.234])
 by mail-in-08.arcor-online.net (Postfix) with ESMTPS id D0ED43AF011;
 Tue, 11 Feb 2014 00:30:02 +0100 (CET)
Received: from lorvorc.mips.inka.de (localhost [127.0.0.1])
 by lorvorc.mips.inka.de (8.14.7/8.14.7) with ESMTP id s1ANU2ij002116;
 Tue, 11 Feb 2014 00:30:02 +0100 (CET)
 (envelope-from naddy@lorvorc.mips.inka.de)
Received: (from naddy@localhost)
 by lorvorc.mips.inka.de (8.14.7/8.14.7/Submit) id s1ANU2Xi002115;
 Tue, 11 Feb 2014 00:30:02 +0100 (CET) (envelope-from naddy)
Date: Tue, 11 Feb 2014 00:30:02 +0100
From: Christian Weisgerber <naddy@mips.inka.de>
To: Rick Macklem <rmacklem@uoguelph.ca>
Subject: Re: Terrible NFS performance under 9.2-RELEASE?
Message-ID: <20140210233002.GA2103@lorvorc.mips.inka.de>
References: <ld8ft9$25o0$1@lorvorc.mips.inka.de>
 <2059385169.3089582.1391993655512.JavaMail.root@uoguelph.ca>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <2059385169.3089582.1391993655512.JavaMail.root@uoguelph.ca>
User-Agent: Mutt/1.5.22 (2013-10-16)
Cc: freebsd-net@freebsd.org
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net/>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 10 Feb 2014 23:30:21 -0000

Rick Macklem:

> > When I switched my desktop box from FreeBSD 7 to 9, NFS read
> > performance from my media server (running OpenBSD) became extremely
> > poor.  I couldn't even stream a movie any longer.  Disabling TSO
> > on the nfe(4) interface had no effect.  My workaround was to switch
> > from a TCP mount to a UDP one.  The problem has persisted to FreeBSD
> > 10.
> > 
> > I can now report that switching to [rw]size=32768 with a TCP mount
> > also works fine.
> > 
> If it is convenient, trying a 64K TCP mount with a kernel that has the
> attached patch (which makes it use page size clusters and reduces the
> # of segments to 18) to see if it works well, would be interesting.

No, this works very poorly.

-- 
Christian "naddy" Weisgerber                          naddy@mips.inka.de