From owner-freebsd-net@FreeBSD.ORG Mon Feb 2 17:27:44 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 70FD41A0 for ; Mon, 2 Feb 2015 17:27:44 +0000 (UTC) Received: from mail.ignoranthack.me (ignoranthack.me [199.102.79.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3C269635 for ; Mon, 2 Feb 2015 17:27:43 +0000 (UTC) Received: from [192.168.200.212] (unknown [50.136.155.142]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sbruno@ignoranthack.me) by mail.ignoranthack.me (Postfix) with ESMTPSA id 22D911941DD; Mon, 2 Feb 2015 17:27:43 +0000 (UTC) Message-ID: <54CFB38E.1040408@ignoranthack.me> Date: Mon, 02 Feb 2015 09:27:42 -0800 From: Sean Bruno Reply-To: sbruno@freebsd.org User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: "Pieper, Jeffrey E" , Jack Vogel , hiren panchasara Subject: Re: Intel 82574L (em) References: <54CBF396.3090903@ignoranthack.me> <20150131010014.GB19333@strugglingcoder.info> <2A35EA60C3C77D438915767F458D6568806C25DE@ORSMSX111.amr.corp.intel.com> In-Reply-To: <2A35EA60C3C77D438915767F458D6568806C25DE@ORSMSX111.amr.corp.intel.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit 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 17:27:44 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 02/02/15 08:42, Pieper, Jeffrey E wrote: > 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 disabling MSIX. > > Jeff > > Are you running tests with the multi-queue implementation in the h/w and driver turned on? sean > ----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-datasheet.pdf >>> >>> >> According to 7.1.11, this device does indeed have 2 queues for stuff and >>> 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" > _______________________________________________ > 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" > > -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAEBCgBmBQJUz7OLXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRCQUFENDYzMkU3MTIxREU4RDIwOTk3REQx MjAxRUZDQTFFNzI3RTY0AAoJEBIB78oecn5kYn0IALVCtNNmWMWIRLlbcVGDg9wo KUbKpvN4UBxOuAvsav8Hussxvy+gh4UXZvgqZ2opTElRrPiUb/iGXa967LWsRaTB TrbvnFE7rJp2xGVlG+rsID+wSdsEAX/isTJWOvpWIqPEULaFvtFh/LUPUrux51Ca SPNzJ+LAh/vWk4sOXN+4PxICiaprlRDs0HF/Mqh5mh8W5TwE3OZy74js7izhNqZS NgowzDyYOq6uhxHZRAC5/GUdpX+ybyCRFZgqKBrNy8BYZV9f+wts2vh7IzwDBSE+ 0ikcM2QGunsr9HH2mnermE2lYF4QKL1Zm8m0mh+TNNIA1O/8Qi4mbE1uMdrzJv4= =9wHn -----END PGP SIGNATURE-----