From owner-freebsd-net@freebsd.org Mon Oct 26 09:28:11 2015 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E6C69A1C4CB for ; Mon, 26 Oct 2015 09:28:11 +0000 (UTC) (envelope-from lars@netapp.com) Received: from mx141.netapp.com (mx141.netapp.com [216.240.21.12]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "mx141.netapp.com", Issuer "Symantec Class 3 Secure Server CA - G4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A10581971 for ; Mon, 26 Oct 2015 09:28:10 +0000 (UTC) (envelope-from lars@netapp.com) X-IronPort-AV: E=Sophos;i="5.20,200,1444719600"; d="asc'?scan'208";a="77255592" Received: from hioexcmbx01-prd.hq.netapp.com ([10.122.105.34]) by mx141-out.netapp.com with ESMTP; 26 Oct 2015 02:27:51 -0700 Received: from HIOEXCMBX07-PRD.hq.netapp.com (10.122.105.40) by hioexcmbx01-prd.hq.netapp.com (10.122.105.34) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Mon, 26 Oct 2015 02:27:51 -0700 Received: from HIOEXCMBX07-PRD.hq.netapp.com ([::1]) by hioexcmbx07-prd.hq.netapp.com ([fe80::e1d9:911e:3048:d510%21]) with mapi id 15.00.1104.000; Mon, 26 Oct 2015 02:27:51 -0700 From: "Eggert, Lars" To: Kevin Oberman CC: Daniel Engberg , "freebsd-net@freebsd.org" Subject: Re: ixl 40G bad performance? Thread-Topic: ixl 40G bad performance? Thread-Index: AQHRDva+ZO+9KY7om02T8EKrgQTcE559lvyAgABhmIA= Date: Mon, 26 Oct 2015 09:27:50 +0000 Message-ID: <0E4C2D93-FBAF-48CB-A704-499ABFC892B9@netapp.com> References: <5aae0ee63c44627223d5d179f1901d00@pyret.net> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3096.5) x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.120.60.34] Content-Type: multipart/signed; boundary="Apple-Mail=_A38DF3C3-4B47-41DA-B31D-FB6732DAD313"; protocol="application/pgp-signature"; micalg=pgp-sha256 MIME-Version: 1.0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Oct 2015 09:28:12 -0000 --Apple-Mail=_A38DF3C3-4B47-41DA-B31D-FB6732DAD313 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On 2015-10-26, at 4:38, Kevin Oberman wrote: > On Sun, Oct 25, 2015 at 12:10 AM, Daniel Engberg < > daniel.engberg.lists@pyret.net> wrote: >=20 >> One thing I've noticed that probably affects your performance = benchmarks >> somewhat is that you're using iperf(2) instead of the newer iperf3 = but I >> could be wrong... >=20 > iperf3 is not a newer version of iperf. It is a total re-write and a = rather > different tool. It has significant improvements in many areas and new > capabilities that might be of use. That said, there is no reason to = think > that the results of tests using iperf2 are in any way inaccurate. = However, > it is entirely possible to get misleading results if options not = properly > selected. FWIW, I've been using netperf and tried various options. I don't think the issues is the benchmarking tool. I think the issue is = TSO/LRO issues (per my earlier email.) Lars --Apple-Mail=_A38DF3C3-4B47-41DA-B31D-FB6732DAD313 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- iQCVAwUBVi3yFtZcnpRveo1xAQgUqwP/aPyIb9JPuHy6cWX2GsysM9lBeKD+5xPW mpNNQPHGsgd6KGtj39IPDHLEkpi5sUn6yTB1PA2OqCA4vD+WzrD/Ehkzs9iucxG4 64pSAOVBzNdRx20nHXOXmzNzRGTHVfqGu9AdpGTRheRod9vCfz6x8vZystBYYvPn Zc6syfs/a9Q= =5OKz -----END PGP SIGNATURE----- --Apple-Mail=_A38DF3C3-4B47-41DA-B31D-FB6732DAD313--