From owner-freebsd-net@freebsd.org Fri Dec 11 07:25:57 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 5EBF49D6A1E for ; Fri, 11 Dec 2015 07:25:57 +0000 (UTC) (envelope-from lars@netapp.com) Received: from mx141.netapp.com (mx141.netapp.com [216.240.21.12]) (using TLSv1.2 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 1B00118B8 for ; Fri, 11 Dec 2015 07:25:56 +0000 (UTC) (envelope-from lars@netapp.com) X-IronPort-AV: E=Sophos;i="5.20,412,1444719600"; d="asc'?scan'208,217";a="87356335" Received: from hioexcmbx07-prd.hq.netapp.com ([10.122.105.40]) by mx141-out.netapp.com with ESMTP; 10 Dec 2015 23:20:47 -0800 Received: from HIOEXCMBX07-PRD.hq.netapp.com (10.122.105.40) by hioexcmbx07-prd.hq.netapp.com (10.122.105.40) with Microsoft SMTP Server (TLS) id 15.0.1130.7; Thu, 10 Dec 2015 23:20:47 -0800 Received: from HIOEXCMBX07-PRD.hq.netapp.com ([::1]) by hioexcmbx07-prd.hq.netapp.com ([fe80::942f:e59f:f84a:7191%21]) with mapi id 15.00.1130.005; Thu, 10 Dec 2015 23:20:47 -0800 From: "Eggert, Lars" To: Denis Pearson CC: Adrian Chadd , "Pieper, Jeffrey E" , Kevin Oberman , "Daniel Engberg" , "freebsd-net@freebsd.org" Subject: Re: ixl 40G bad performance? Thread-Topic: ixl 40G bad performance? Thread-Index: AQHRDva+ZO+9KY7om02T8EKrgQTcE559lvyAgABhmICAAFavAIAACEoAgAARDQCAABmYAIBGsssAgAAkkACAAAL9AIAAEXkAgADDEQA= Date: Fri, 11 Dec 2015 07:20:47 +0000 Message-ID: <72184809-0507-4927-BCA3-22ACC126FA50@netapp.com> References: <5aae0ee63c44627223d5d179f1901d00@pyret.net> <0E4C2D93-FBAF-48CB-A704-499ABFC892B9@netapp.com> <2A35EA60C3C77D438915767F458D6568807F2A8A@ORSMSX111.amr.corp.intel.com> <99E53825-99F8-4E82-A710-6BC07B123F77@netapp.com> <2A35EA60C3C77D438915767F458D6568807F2D52@ORSMSX111.amr.corp.intel.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3112) x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.120.60.37] Content-Type: multipart/signed; boundary="Apple-Mail=_FAB4E4D4-EEAE-4D68-83E1-37F9E972C1BD"; protocol="application/pgp-signature"; micalg=pgp-sha256 MIME-Version: 1.0 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 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: Fri, 11 Dec 2015 07:25:57 -0000 --Apple-Mail=_FAB4E4D4-EEAE-4D68-83E1-37F9E972C1BD Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi, On 2015-12-10, at 20:42, Denis Pearson wrote: > I can probably find out a snapshot with the code at the time and = extract a diff, yes. I just don't know how it worths wasting the time = when the problem is not reproducible on the current 1.4.8 driver which = will hopefully get into -CURRENT (if it's not already there?). per my last email, I do see the same issues with 1.4.8. This is with a single netperf TCP flow, no NIC parameter tuning and no = RSS or PCBGROUP in the kernel. > This is why I suggested a transceiver change or replug first. I will test this next week. (However, the same testbed booted into Linux = doesn't see these low netperf numbers.) It really smells like a TSO/LRO (=3D packet rate) issue. If I configure = jumbograms, performance jumps up as expected. Lars --Apple-Mail=_FAB4E4D4-EEAE-4D68-83E1-37F9E972C1BD 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----- iQIcBAEBCAAGBQJWanlNAAoJEFS1wwm/cMFXkQoP/19pmIvjixR89hhSoirGzA2P 7/KsOmPqMlKuuohy0y4pGL6VgBfl1y0E2zsngfE0lkbFfcCUUgegq5p553hO1+vH adQF3UdOTm5fo1X6NOAWhkToIJf1T3X9N8KUhhZ3gy+eUV9nt1nCzA0E3kLdI68T 8eQCS/N1c13HEl1NCMi0Hri6yQJaAqmQHjp/vfMKaNtNYkn1cVlxealfqqSoVPY4 BgKBrTSAspETOKsd0SEZXubd43Apbg5av9V/BGuKF4gpO9EYVSemZFmBgXtGVEbs s+oyR1ROhWrOz2r4IG4uxQodI3WHhgSXc5GV0L+fSXxmM9iqchT8jAnvfXV3iDkQ I38zC3csNtuaMNVy99AjoWd2O1jDnBJQT7KMdZeufxjJqEGVgU49lsA3TEdh/6uL tC/xwNlaaxBo99ClBnXLOLrVAsmsLvTRzNx7QjjSMruUOFtxfbOhBvyfcVLcFeTv XoBcv6HTREd3HKrGgBr/xBJgc7qvZlAIedx9YFhtJ3yoaraWIYyBMexSLgiClABn tE7+sdgfa1VaIdfJGrVkt1GrUlOA78z/iOxvdi1JYD6H18ux4msY8CH54ATcViZd ZUTjj0j+/u8GdtS9+gWlL+o3EMbbiSFTbkignC02Ngn51Kb7R69/iOf4x/c4csSx e0AYBhcRjx9XAtzcjzpq =nCz1 -----END PGP SIGNATURE----- --Apple-Mail=_FAB4E4D4-EEAE-4D68-83E1-37F9E972C1BD--