From owner-freebsd-net@FreeBSD.ORG Thu Jun 9 17:29:55 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DCA591065670 for ; Thu, 9 Jun 2011 17:29:54 +0000 (UTC) (envelope-from lacombar@gmail.com) Received: from mail-pz0-f54.google.com (mail-pz0-f54.google.com [209.85.210.54]) by mx1.freebsd.org (Postfix) with ESMTP id B239C8FC14 for ; Thu, 9 Jun 2011 17:29:54 +0000 (UTC) Received: by pzk27 with SMTP id 27so1092145pzk.13 for ; Thu, 09 Jun 2011 10:29:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=RyGCW4zygXFOh6D2znsH1foVGdcLfxVr/7kjSw3qxkg=; b=DGMUvd5aZQ3tFgskRL6TkO2BqfOWqOLED8Q3QG3/DoD9sG9REeI/5c+aceKJO+X4mJ cnrKooU3xhlzu8w+ifAMqHnv2hGQqWVjWDRISw/5bok2jP10+WFKGgijIEOZLkqBd6ki yCvhczZYimH8dYhi457UsnBnESDcsGWhrb4Oo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=N7Pgraf9P/lcN84PEXdUIFTJjI7KiJfMKEIEEbwEViuLd5XHcn6sAMkij2jtGJp1sr QiwdTXXJuPjWZJxVREywsvyp9p4UlGnao1O3TyjgudeTiR9+zRDIwKxO3d5odQk0JJDw Rjp96oUvzMmYcUZEHG89Ot/N3OYfYq39vow4s= MIME-Version: 1.0 Received: by 10.68.38.4 with SMTP id c4mr449019pbk.336.1307640594176; Thu, 09 Jun 2011 10:29:54 -0700 (PDT) Received: by 10.68.52.164 with HTTP; Thu, 9 Jun 2011 10:29:54 -0700 (PDT) In-Reply-To: References: Date: Thu, 9 Jun 2011 13:29:54 -0400 Message-ID: From: Arnaud Lacombe To: Mario Spinthiras Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: freebsd-net@freebsd.org Subject: Re: strange igb interface performance problems X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 09 Jun 2011 17:29:55 -0000 Hi, On Thu, Jun 9, 2011 at 11:53 AM, Mario Spinthiras wrote: > Hello All, > > =A0The subject topic might catch a few by surprise because for the most p= art > it smells a lot like a problem that came to light in 2009 regarding bad > performance on Intel NICs using the igb driver. > > =A0I currently have a point to point link between 2 pfsense 2.0RC1 runnin= g > FreeBSD 8.1 that connect via a 1Gbps link. The link itself has been teste= d > and the provider reckons that the link is fine. (I also believe this too)= . > What kind of link What RTT ? > We then started high and went low to search for the problem. We ditched o= ut > the media converters, went on a mad mission to tune every single last det= ail > on the stack to give us the full performance, however on the 1Gbps line w= e > see a rough 20Mbps. > What kind of traffic ? from your later comment, I'd assume TCP. What about = UDP ? > We then turned towards the igb driver which smells a little funny > considering that the issues I mentioned that have emerged back in 2009 > regarding similar issues are alive and well today. > Could you details those trouble ? 2 years is certainly a very long time, especially for people who were not on the list then. > Does anyone out there have any experience or knowledge of such problems > caused by the igb driver? I'm going to plan a maintenance window on this > link within the next day or so hoping that I'll be able to live boot a 2.= 0 > RC1 nightly and try it again. The current RC1 is one of the earlier ones. > > Any info you can send my way on this baffling mystery that has taken me o= n a > goose chase. Disabling TSO/LRO does not solve the problem for me. Can any= one > shed some light on this? > Can you at least post some information on the system, relevant part of 'dmesg', 'ifconfig -a' and 'pciconf -l', 'netstat -m', 'sysctl dev.igb' after the test, Thanks, - Arnaud > > Thanking you all in advance, > > Mario > _______________________________________________ > 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" >