From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id B6EB82A1A for ; Thu, 18 Dec 2014 02:33:05 +0100 (CET) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga101.fm.intel.com with ESMTP; 17 Dec 2014 17:32:45 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,862,1389772800"; d="scan'208";a="430442303" Received: from pgsmsx102.gar.corp.intel.com ([10.221.44.80]) by FMSMGA003.fm.intel.com with ESMTP; 17 Dec 2014 17:21:33 -0800 Received: from kmsmsx154.gar.corp.intel.com (172.21.73.14) by PGSMSX102.gar.corp.intel.com (10.221.44.80) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 18 Dec 2014 09:32:42 +0800 Received: from shsmsx152.ccr.corp.intel.com (10.239.6.52) by KMSMSX154.gar.corp.intel.com (172.21.73.14) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 18 Dec 2014 09:32:42 +0800 Received: from shsmsx102.ccr.corp.intel.com ([169.254.2.216]) by SHSMSX152.ccr.corp.intel.com ([169.254.6.5]) with mapi id 14.03.0195.001; Thu, 18 Dec 2014 09:32:40 +0800 From: "Ouyang, Changchun" To: Vlad Zolotarov , Thomas Monjalon Thread-Topic: [dpdk-dev] DPDK RSS support for ixgbevf PMD Thread-Index: AQHQGKRZnn+TSM/iH0ScjhVL4Ef+MpyQlUIAgAE/YwCAASIaUP///dCAgAGb5hA= Date: Thu, 18 Dec 2014 01:32:40 +0000 Message-ID: References: <6168753.p4Vk7dlKkK@xps13> <5490516C.8090202@cloudius-systems.com> <549142F1.2060307@cloudius-systems.com> In-Reply-To: <549142F1.2060307@cloudius-systems.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: "dev@dpdk.org" , Avi Kivity , Gleb Natapov Subject: Re: [dpdk-dev] DPDK RSS support for ixgbevf PMD X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Dec 2014 01:33:06 -0000 Hi > -----Original Message----- > From: Vlad Zolotarov [mailto:vladz@cloudius-systems.com] > Sent: Wednesday, December 17, 2014 4:47 PM > To: Ouyang, Changchun; Thomas Monjalon > Cc: dev@dpdk.org; Avi Kivity; Gleb Natapov > Subject: Re: [dpdk-dev] DPDK RSS support for ixgbevf PMD >=20 >=20 > On 12/17/14 03:03, Ouyang, Changchun wrote: > > Hi , > > > >> -----Original Message----- > >> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Vlad Zolotarov > >> Sent: Tuesday, December 16, 2014 11:36 PM > >> To: Thomas Monjalon > >> Cc: dev@dpdk.org; Avi Kivity; Gleb Natapov > >> Subject: Re: [dpdk-dev] DPDK RSS support for ixgbevf PMD > >> > >> > >> On 12/15/14 22:33, Thomas Monjalon wrote: > >>> 2014-12-15 21:11, Vladislav Zolotarov: > >>>> Hi, > >>>> I'm running an ixgbevf PMD on an AWS guests with extended > >>>> networking (SR-IOV functions of 82599 Intel's NIC) and noticed that > >>>> even in the current git tree there is no support for a multi-queue i= n this > PMD: > >>>> reta size returned by rte_eth_dev_info_get() call is 0, while > >>>> max_rx_queues and max_tx_queues are both 4. > >>>> > >>>> Linux ixgbevf-2.15.3 driver on the other hand successfully > >>>> initializes 2 RSS queues: for some reason it always limits the > >>>> number of > >> RSS queues by 2. > >>>> ixgbevf_main.c: line 2539 > >>>> u16 rss =3D min_t(u16, num_online_cpus(), 2); > >>>> > >>>> The above is strange since if MRQE is set to 1010b there are 4 RSS > >>>> queues available which seems to be the case in my AWS Guest. > >>>> > >>>> However, let's get back to DPDK. As I've mentioned above the SR-IOV > >>>> function i have is RSS capable (to be 100% sure I've verified both > >>>> queues are receiving packets in a multi-socket TCP test). And it's > >>>> a shame I can't utilize it with a DPDK. > >>> Yes, it is not yet supported. > >>> But a patch was recently sent: > >>> http://dpdk.org/ml/archives/dev/2014-December/010028.html > >> Applying this patchset seems to break the NIC fast path functionality > >> of a AWS Guest NIC. > >> I'm still debugging it - will update u as soon as I have more specific= info. >=20 > Hi, thanks for tips but I have a question below. >=20 > > Pls make sure enabling and using 4 queues on guest >=20 > Why should I enable all 4? Won't any number below or equal 4 work if (!) > 4 queues are available? > Note that there is a 82599 mode when only 2 RSS queues are available per > VF: MRQE=3D1011b. >=20 Yes you are right, it could be 2 queues, the actual queue number per VF dep= ends on the number of VF: VF number from 1~32: 4 queues per VF; VF number from 33~64: 2 queues per VF; The queue number is determined by the vf number at the pf init stage, If pf setup 4 queues for each vf and distribute packets to 4 queues, but vf= only poll 1 or 2 queue, Then packets in other queues will be lost. You can try to poll 4 queues firstly to debug your issue. Thanks Changchun