From owner-freebsd-stable@FreeBSD.ORG Tue Mar 21 23:58:52 2006 Return-Path: X-Original-To: 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 E670A16A459; Tue, 21 Mar 2006 23:58:51 +0000 (UTC) (envelope-from mi+mx@aldan.algebra.com) Received: from zig.murex.com (mail.murex.com [194.98.239.11]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0B62943D46; Tue, 21 Mar 2006 23:58:50 +0000 (GMT) (envelope-from mi+mx@aldan.algebra.com) Received: from interscan.fr.murex.com (interscan.fr.murex.com [172.21.17.207] (may be forged)) by zig.murex.com with ESMTP id k2M00bJQ002045; Wed, 22 Mar 2006 01:00:37 +0100 (CET) Received: from mxmail.murex.com (interscan.murex.fr [127.0.0.1]) by interscan.fr.murex.com (8.11.6/8.11.6) with ESMTP id k2M0SuO20219; Wed, 22 Mar 2006 01:28:56 +0100 Received: from mteterin.us.murex.com ([172.21.130.86]) by mxmail.murex.com with Microsoft SMTPSVC(6.0.3790.0); Wed, 22 Mar 2006 00:58:12 +0100 From: Mikhail Teterin Organization: Virtual Estates, Inc. To: "Patrick M. Hausen" Date: Tue, 21 Mar 2006 18:58:01 -0500 User-Agent: KMail/1.8.3 References: <200603211607.30372.mi+mx@aldan.algebra.com> <200603211831.54172.mi+mx@aldan.algebra.com> <20060321234856.GA24194@hugo10.ka.punkt.de> In-Reply-To: <20060321234856.GA24194@hugo10.ka.punkt.de> MIME-Version: 1.0 Content-Type: text/plain; charset="koi8-u" Content-Transfer-Encoding: 8bit Content-Disposition: inline Message-Id: <200603211858.02801.mi+mx@aldan.algebra.com> X-OriginalArrivalTime: 21 Mar 2006 23:58:13.0064 (UTC) FILETIME=[50381C80:01C64D43] Cc: alc@freebsd.org, stable@freebsd.org Subject: Re: more weird bugs with mmap-ing via NFS 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, 21 Mar 2006 23:58:52 -0000 в╕второк 21 березень 2006 18:48, Patrick M. Hausen Ви написали: > On Tue, Mar 21, 2006 at 06:26:45PM -0500, Mikhail Teterin wrote: > > The problem is about same with 32K and 16K packets. With 8K packets, the > > thing kind-of works (although trying to `systat -vm' still stalls disk > > access), but the outgoing traffic is over 20Mb/s on average -- MUCH more, > > than the writing program itself generates. > > Are you using TCP or UDP for your NFS mounts? I don't specify either, but the default is UDP, is not it? > Now imagine a client that experiences this problem only > sometimes. Modern hardware, but for some reason (network > congestion?) some frames are still lost if sent back-to-back. > (Realtek chipset on the receiving side?) No, both sides have em-cards and are only separated by a rather decent large switch. I'll try the TCP mount, workaround. If it helps, we can assume, our UDP NFS is broken for sustained high bandwidth writes :-( Thanks! -mi