From owner-freebsd-net@FreeBSD.ORG Mon Feb 2 16:42:49 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id BDF31386 for ; Mon, 2 Feb 2015 16:42:49 +0000 (UTC) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by mx1.freebsd.org (Postfix) with ESMTP id 9532BE73 for ; Mon, 2 Feb 2015 16:42:49 +0000 (UTC) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP; 02 Feb 2015 08:38:42 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,862,1389772800"; d="scan'208";a="448763102" Received: from orsmsx105.amr.corp.intel.com ([10.22.225.132]) by FMSMGA003.fm.intel.com with ESMTP; 02 Feb 2015 08:28:03 -0800 Received: from orsmsx158.amr.corp.intel.com (10.22.240.20) by ORSMSX105.amr.corp.intel.com (10.22.225.132) with Microsoft SMTP Server (TLS) id 14.3.195.1; Mon, 2 Feb 2015 08:42:07 -0800 Received: from orsmsx111.amr.corp.intel.com ([169.254.11.110]) by ORSMSX158.amr.corp.intel.com ([169.254.10.150]) with mapi id 14.03.0195.001; Mon, 2 Feb 2015 08:42:07 -0800 From: "Pieper, Jeffrey E" To: Jack Vogel , hiren panchasara Subject: RE: Intel 82574L (em) Thread-Topic: Intel 82574L (em) Thread-Index: AQHQPNFkP3MptScjxEq0dTQWShT445zZ7wMAgAA6nwCAA2nSEA== Date: Mon, 2 Feb 2015 16:42:06 +0000 Message-ID: <2A35EA60C3C77D438915767F458D6568806C25DE@ORSMSX111.amr.corp.intel.com> References: <54CBF396.3090903@ignoranthack.me> <20150131010014.GB19333@strugglingcoder.info> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.22.254.138] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: FreeBSD Net X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.18-1 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, 02 Feb 2015 16:42:49 -0000 Iirc, we experienced issues with 82574L, where the interface will hang/die.= This is resolved in both FreeBSD and Linux by forcing ASPM off and disabli= ng MSIX. Jeff ----Original Message----- From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@freebsd.org] = On Behalf Of Jack Vogel Sent: Friday, January 30, 2015 8:30 PM To: hiren panchasara Cc: FreeBSD Net Subject: Re: Intel 82574L (em) Yup, I wrote that :) Sean, I will check around to see if anything may have changed in that regard. Jack On Fri, Jan 30, 2015 at 5:00 PM, hiren panchasara < hiren@strugglingcoder.info> wrote: > On Fri, Jan 30, 2015 at 01:11:50PM -0800, Sean Bruno wrote: > > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA512 > > > > > http://www.intel.com/content/dam/doc/datasheet/82574l-gbe-controller-data= sheet.pdf > > > > According to 7.1.11, this device does indeed have 2 queues for stuff an= d > > or things. So, basic RSS would be possible in something like an Atom > box. > > > > I note that the em(4) driver intentionally disables this on > > initialization. I'm up for some science on my new shiny, soon to be > > router box. Any reason not to default to 1 queue and allow loader.conf > > to raise it to 2? > > Intel folks know better but it seems this is hartwell. > > em_setup_msix() in very start says: > > /* > ** Setup MSI/X for Hartwell: tests have shown > ** use of two queues to be unstable, and to > ** provide no great gain anyway, so we simply > ** seperate the interrupts and use a single queue. > */ > > Things may have changed now. I guess you can try enabling it and find out > :-) > > cheers, > Hiren > _______________________________________________ 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"