From owner-freebsd-net@FreeBSD.ORG Thu Apr 28 16:09:07 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 AE6BC106564A for ; Thu, 28 Apr 2011 16:09:07 +0000 (UTC) (envelope-from kungfujesus06@gmail.com) Received: from mail-iy0-f182.google.com (mail-iy0-f182.google.com [209.85.210.182]) by mx1.freebsd.org (Postfix) with ESMTP id 6922D8FC0A for ; Thu, 28 Apr 2011 16:09:07 +0000 (UTC) Received: by iyj12 with SMTP id 12so3288062iyj.13 for ; Thu, 28 Apr 2011 09:09:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:date:from:to:cc:subject:message-id:references :mime-version:content-type:content-disposition:in-reply-to :user-agent; bh=IJ27hXqns60geUMM9Kei6irpFXkotkobH05WUkgEEuM=; b=HyKuTsm4g1m7iK6FOZJnHRNrT88hHFFyFdAVzI+BpUrUJWeHRJCkFUeIDNIn83nBA8 WvHxRSbITXXpi51XlHb3AF+AFUDnPikOla4wa4Vg9mN8NnQoW0jEgFY6sNAOwbOsu9hJ rDYl2huxDvygjqGOs5hpnTOLYU9agidtFpibc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=qAenyTZ+3qiZcPm0+n+D7WTGJnysTtjQ8Wrpztm/kb6wYI6FMcvkMYv3vvQxeDef2p IiYva+kjy3MWSFYubOam4b4QinahaO9nI9b3lGPBUD+ien8RqGbbXX7EkFhbNLWhQBG5 HJyZVCBhro7KYYqYbOBGTvufbBzyQnsFpAaTs= Received: by 10.42.97.66 with SMTP id m2mr4843822icn.515.1304006945290; Thu, 28 Apr 2011 09:09:05 -0700 (PDT) Received: from ossumpossum.geop.uc.edu ([129.137.163.68]) by mx.google.com with ESMTPS id gx2sm763086ibb.9.2011.04.28.09.09.03 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 28 Apr 2011 09:09:03 -0700 (PDT) Date: Thu, 28 Apr 2011 12:09:19 -0400 From: Adam Stylinski To: Steven Hartland Message-ID: <20110428160919.GE19362@ossumpossum.geop.uc.edu> References: <20110428072946.GA11391@zephyr.adamsnet> <4DB965D8.7090906@sentex.net> <20110428141339.GD2800@ossumpossum.geop.uc.edu> <20110428144513.GF2800@ossumpossum.geop.uc.edu> <41EE7AB832F24194AC8730544E1C2EB7@multiplay.co.uk> <20110428152141.GA19362@ossumpossum.geop.uc.edu> <11659E32824B4B1E91B6B219BDEF1234@multiplay.co.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="0QFb0wBpEddLcDHQ" Content-Disposition: inline In-Reply-To: <11659E32824B4B1E91B6B219BDEF1234@multiplay.co.uk> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: freebsd-net@freebsd.org Subject: Re: em0 performance subpar 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, 28 Apr 2011 16:09:07 -0000 --0QFb0wBpEddLcDHQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Apr 28, 2011 at 04:29:42PM +0100, Steven Hartland wrote: > Try using a large buffer size on iperf and check the flow control options= on the switch. >=20 > ----- Original Message -----=20 > From: "Adam Stylinski" > Just using the default settings with iperf. Netblast is giving me simila= r results. Disabling TCP checksum offloading (transmit=20 > and receive) and large receive offload have zero effect. >=20 > --=20 > Adam Stylinski > PGP Key: http://pohl.ececs.uc.edu/~adam/publickey.pub > Blog: http://technicallyliving.blogspot.com >=20 >=20 >=20 >=20 > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > This e.mail is private and confidential between Multiplay (UK) Ltd. and t= he person or entity to whom it is addressed. In the event of misdirection, = the recipient is prohibited from using, copying, printing or otherwise diss= eminating it or any information contained in it.=20 >=20 > In the event of misdirection, illegible or incomplete transmission please= telephone +44 845 868 1337 > or return the E.mail to postmaster@multiplay.co.uk. >=20 [adam@nasbox ~]$ iperf -m -w 1677216 -l1M -c 192.168.0.121 ------------------------------------------------------------ Client connecting to 192.168.0.121, TCP port 5001 TCP window size: 1.60 MByte (WARNING: requested 1.60 MByte) ------------------------------------------------------------ [ 3] local 192.168.0.60 port 24761 connected with 192.168.0.121 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 694 MBytes 581 Mbits/sec [ 3] MSS size 8192 bytes (MTU 8232 bytes, unknown interface) Switch is unmanaged, options are non-existent. --=20 Adam Stylinski PGP Key: http://pohl.ececs.uc.edu/~adam/publickey.pub Blog: http://technicallyliving.blogspot.com --0QFb0wBpEddLcDHQ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (FreeBSD) iQIcBAEBAgAGBQJNuZEvAAoJED6sRHE6TvmnK7cP/3W64kjIRgi9VHhdTql0dBck ifTEwRb2GoPqJOZbFMwxFkKHI3lWsxGXDldMFuiN6bS0+73SDd7fCho/g3RC/KZg Cx4JoRtpm+vIRPHOWh8iYFMtOWCF1Fof3L8KFX1y1IQB1qvg3jZAFse3IoZgoaK8 s9vEdVCQ/kGApulNmk9mZar7FjyZlOwAL4T1Y6HszAxidrmJDaB6qUhEUnNZVG4o luMs0CzmJYFlGP9dl+MQY9UF5fdJ3qVAtPjQhqHKUKVIBEzo3yEqZa0gHilcAYKq JEBwRYh/dfZbRY6/wRzEVxAU48W/pBaMWPyYo2H4g4rYcuerCHgDnTqL0h8QsB0m 76k1JBTNhQ4JtNEy7txFUmv03f1HxGMAxvgPYFitNJETTMsJ3JlfghicoS3hwh80 gmOgIma+DDvf5o4jsG3B4KvmHeTyDjKrhOJKvzx5CaS+WtfhVmr2sqJGyTJu6Zfa wjWA2KTHwHj49tkD6heEuLsTVmyLtuxm4O+m/HEeEzcYa+Z1pfdGYAJm2cLT9Rs4 ISF78WsXTYbaH4EulHnz5plX3IFxnBIYAfh8ZrZRrQCPIx7VHVY3H2Zis5WcHFUp OhKUxyWQvOvEDKnGrwqAItD6UjDI9ocNMRVAFyvbK2CrurL1ei5FTu7Ouu88nM34 5+6ZOYcyq2aR7+4joPXi =gCvp -----END PGP SIGNATURE----- --0QFb0wBpEddLcDHQ--