From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.tuxdriver.com (charlotte.tuxdriver.com [70.61.120.58]) by dpdk.org (Postfix) with ESMTP id 28C0EB39C for ; Fri, 11 Jul 2014 16:59:44 +0200 (CEST) Received: from uucp by smtp.tuxdriver.com with local-rmail (Exim 4.63) (envelope-from ) id 1X5cJ0-0003Pv-EL; Fri, 11 Jul 2014 11:00:10 -0400 Received: from linville-x1.hq.tuxdriver.com (localhost.localdomain [127.0.0.1]) by linville-x1.hq.tuxdriver.com (8.14.8/8.14.6) with ESMTP id s6BEpr2A026819; Fri, 11 Jul 2014 10:51:53 -0400 Received: (from linville@localhost) by linville-x1.hq.tuxdriver.com (8.14.8/8.14.8/Submit) id s6BEpqmS026818; Fri, 11 Jul 2014 10:51:52 -0400 Date: Fri, 11 Jul 2014 10:51:52 -0400 From: "John W. Linville" To: Thomas Monjalon Message-ID: <20140711145152.GB25478@tuxdriver.com> References: <1405024369-30058-1-git-send-email-linville@tuxdriver.com> <140509179.juH2PgJsn9@xps13> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <140509179.juH2PgJsn9@xps13> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: dev@dpdk.org Subject: Re: [dpdk-dev] [PATCH] librte_pmd_packet: add PMD for AF_PACKET-based virtual devices 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: Fri, 11 Jul 2014 14:59:44 -0000 On Fri, Jul 11, 2014 at 03:26:39PM +0200, Thomas Monjalon wrote: > 2014-07-10 16:32, John W. Linville: > > This is a Linux-specific virtual PMD driver backed by an AF_PACKET > > socket. This implementation uses mmap'ed ring buffers to limit copying > > and user/kernel transitions. The PACKET_FANOUT_HASH behavior of > > AF_PACKET is used for frame reception. In the current implementation, > > Tx and Rx queues are always paired, and therefore are always equal > > in number -- changing this would be a Simple Matter Of Programming. > > > > Interfaces of this type are created with a command line option like > > "--vdev=eth_packet0,iface=...". There are a number of options availabe > > as arguments: > > > > - Interface is chosen by "iface" (required) > > - Number of queue pairs set by "qpairs" (optional, default: 16) > > - AF_PACKET MMAP block size set by "blocksz" (optional, default: 4096) > > - AF_PACKET MMAP frame size set by "framesz" (optional, default: 2048) > > - AF_PACKET MMAP frame count set by "framecnt" (optional, default: 512) > > > > Signed-off-by: John W. Linville > > --- > > This PMD is intended to provide a means for using DPDK on a broad > > range of hardware without hardware-specific PMDs and (hopefully) > > with better performance than what PCAP offers in Linux. This might > > be useful as a development platform for DPDK applications when > > DPDK-supported hardware is expensive or unavailable. > > Thank you for this nice work. > > I think it would be well suited to host this PMD as an external one in order > to make it work also with DPDK 1.7.0. I'm not sure I understand the suggestion -- you don't want to merge the driver for 1.8? Or you just want to host this patch somewhere, so people can still use it w/ 1.7? John -- John W. Linville Someday the world will need a hero, and you linville@tuxdriver.com might be all we have. Be ready.