From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f43.google.com (mail-wg0-f43.google.com [74.125.82.43]) by dpdk.org (Postfix) with ESMTP id 1913DB39D for ; Fri, 11 Jul 2014 17:03:51 +0200 (CEST) Received: by mail-wg0-f43.google.com with SMTP id l18so468968wgh.2 for ; Fri, 11 Jul 2014 08:04:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:organization :user-agent:in-reply-to:references:mime-version :content-transfer-encoding:content-type; bh=WYAwcr4esCkDMuaBJK84+qy5rdD9T1cQxRE2ay95HDM=; b=Y3kbUH2dhH7JJSpEdg0ESgZ30WOm7QCLYt4mf8TVH0bii9IXk3fO40hKDhaUjO+HbU 4/hoFh3846PnQ9T1S69h4OIQv1aTYfwJRYFpFAs8Rjgd22UAn+OFI1HN9jRMd5gzGCuF 8Se2bej0g176Jpgl0mElIY24zYpWT+k0vEmXYZ7P3YzK0pm0Cma/yJP2dhaN/ObasVk/ sqN7GshuBzebDD0Q75KK/ea0jaVDW7ooAd/EBH1p4BWGuaHgojQOTwIRi3hM+ZcwHrW7 SMfrFS3+8295lSvyXIrr6uAUEs2/Pwga1BOdqI7dhQsezM2TJPlJSK8IjL6/caV/rhCl 2Iiw== X-Gm-Message-State: ALoCoQllo2W5QioLX6fjHPWwzBK0CqAG9rlczufYC4cWUilPOG3ibpB+/3PgclznTA6FRAo4C4bT X-Received: by 10.194.173.7 with SMTP id bg7mr64970532wjc.3.1405091056689; Fri, 11 Jul 2014 08:04:16 -0700 (PDT) Received: from xps13.localnet (136-92-190-109.dsl.ovh.fr. [109.190.92.136]) by mx.google.com with ESMTPSA id de6sm5700140wjc.16.2014.07.11.08.04.15 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 11 Jul 2014 08:04:15 -0700 (PDT) From: Thomas Monjalon To: "John W. Linville" Date: Fri, 11 Jul 2014 17:04:04 +0200 Message-ID: <1669414.yQGOz8cIDY@xps13> Organization: 6WIND User-Agent: KMail/4.13.1 (Linux/3.14.6-1-ARCH; KDE/4.13.1; x86_64; ; ) In-Reply-To: <20140711145152.GB25478@tuxdriver.com> References: <1405024369-30058-1-git-send-email-linville@tuxdriver.com> <140509179.juH2PgJsn9@xps13> <20140711145152.GB25478@tuxdriver.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" 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 15:03:52 -0000 2014-07-11 10:51, John W. Linville: > 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? I suggest to have a separated repository here: http://dpdk.org/browse/ -- Thomas