From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id 36DF28E9F for ; Thu, 26 Nov 2015 18:56:12 +0100 (CET) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP; 26 Nov 2015 09:56:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,347,1444719600"; d="scan'208";a="847722048" Received: from irsmsx106.ger.corp.intel.com ([163.33.3.31]) by fmsmga001.fm.intel.com with ESMTP; 26 Nov 2015 09:56:10 -0800 Received: from irsmsx104.ger.corp.intel.com ([169.254.5.138]) by IRSMSX106.ger.corp.intel.com ([169.254.8.228]) with mapi id 14.03.0248.002; Thu, 26 Nov 2015 17:56:09 +0000 From: "Traynor, Kevin" To: "dev@openvswitch.org" Thread-Topic: OVS with DPDK Meetup notes Thread-Index: AdEocQN89+PFAvC2THGnp+yfB/5txg== Date: Thu, 26 Nov 2015 17:56:08 +0000 Message-ID: Accept-Language: en-IE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [163.33.239.181] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailman-Approved-At: Fri, 27 Nov 2015 10:27:16 +0100 Cc: "users@dpdk.org" Subject: [dpdk-users] OVS with DPDK Meetup notes X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Nov 2015 17:56:12 -0000 Hi All, Just wanted to post some summary notes on the recent OVS with DPDK Meetup w= e=20 had after the OVS conference. Thanks to everyone for the often lively discu= ssion.=20 I've collated and condensed Maryam's notes (Thank you Maryam) with my own.= =20 Corrections and additions are welcome. Usability =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D * Command line options=20 - Create defaults which can be overridden on the command line. -c 0x1 -n 4 (this will be in DPDK 2.2 also) -socket-mem 1024,0=20 * igb / vfio / uio=20 - Update documentation to explain these better. * 1GB v 2MB Hugepages - Test to see if significant performance difference between them and if n= ot, update documentation to preference 2 MB pages.=20 * Assignment of queues to cores/PMD threads - Would like to allow for better load balancing of traffic across cores. - Add appctl command to get the current queue/core assignments (currently= =20 it's only in logs). - Discussion about relative merits of trying to do something better than= =20 current scheme automatically or allowing a user interface to configure= =20 manually. General consensus seemed to be that while it might be difficu= lt=20 to do well automatically, it would be good to investigate and exhaust t= hat=20 possibility before adding a manual user config. - Possibility of using DPDK light weight threads discussed. * Debugging - A tcpdump type solution would be nice. Follow DPDK and leverage. * More flexible port names / auto-discovery of ports - Follow DPDK and leverage. * Single binary for OVS/OVS with DPDK and static vs. dynamic linking - Discussion around deployment and what the best model is. - Flavio has posted a mail on this http://openvswitch.org/pipermail/dev/2015-November/062599.html * Documentation - Make INSTALL.DPDK.md guide cover the most common use cases only, and sp= lit=20 the other stuff into a less common/advanced guide.=20 Testing =3D=3D=3D=3D=3D=3D=3D * General agreement in the room that VSPERF pushing a nightly test report f= or=20 OVS/OVS with DPDK to the ovs-build ML would be useful. * Static Analysis - Is there an open source static analysis tool that the community could a= ll use? Features =3D=3D=3D=3D=3D=3D=3D=3D * Multiqueue vhost-user - Looks really promising - will help us scale out performance to the VM.= =20 * vhost-cuse=20 - Still used by some. Give notice to deprecate as there's a maintenance c= ost.=20 2 releases was mentioned, but I'm not sure that's clear to a user witho= ut a=20 regular release cadence.=20 * dpdkr/ivshmem - Still useful. Check/Update documentation to ensure limitations are clea= r. Performance =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D * Some new optimizations coming in DPDK for vhost performance that we can=20 leverage. * Scalability=20 - Performance is scaling well across cores (See Gerald Roger's OVS conf=20 presentation for reference) At that point everyone was "conferenced out", but tentative plan to arrange= =20 another meetup in ~6 months' time if there's enough discussion items to war= rant=20 it. Thanks, Kevin.