From owner-freebsd-current@FreeBSD.ORG Mon Jan 11 07:04:18 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1327F106568D for ; Mon, 11 Jan 2010 07:04:18 +0000 (UTC) (envelope-from ehrmann@gmail.com) Received: from mxout-07.mxes.net (mxout-07.mxes.net [216.86.168.182]) by mx1.freebsd.org (Postfix) with ESMTP id DC84B8FC12 for ; Mon, 11 Jan 2010 07:04:17 +0000 (UTC) Received: from [10.0.0.171] (unknown [64.9.237.22]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.mxes.net (Postfix) with ESMTPSA id DEC7122E1EB; Mon, 11 Jan 2010 02:04:10 -0500 (EST) Message-ID: <4B4ACD68.5030907@gmail.com> Date: Sun, 10 Jan 2010 23:04:08 -0800 From: David Ehrmann User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: pyunyh@gmail.com References: <4B40AFFA.6090706@gmail.com> <20100103221630.GV1166@michelle.cdnetworks.com> <4B47B4F6.8030106@gmail.com> <20100109013145.GG18529@michelle.cdnetworks.com> In-Reply-To: <20100109013145.GG18529@michelle.cdnetworks.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org Subject: Re: vge traffic problem X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Jan 2010 07:04:18 -0000 Pyun YongHyeon wrote: > On Fri, Jan 08, 2010 at 02:43:02PM -0800, David Ehrmann wrote: > >> It seems to be working, but I'm going to keep testing it before I >> >> proclaim it fixed. Will these changes be in 8.1? >> I spoke too soon. Now an nfs client is having problems. I ran iperf and saw what looks like a decent rx connection, but a tx connection where up to 2% of UDP packets are dropped (see http://pastebin.com/m1c067417 ). If both sides are gigabit connections, I see more like 13%. If I flip client and server sides, the results still show issues with vge tx. I ran iperf like this: iperf -s -u -r and iperf -c 10.0.x.x -u -r. Other machines have problems with the vge interface, but drop no more than a packet between themselves. This doesn't happen with my vr interface. I gave it an IP in a 192.168.x.x subnet and repeated the test. Most of the time, zero packets were dropped. When packets were dropped, it was fewer than 2%. Are there any known bugs that cause UDP tx packet drops on vge?