From owner-freebsd-net@FreeBSD.ORG Sat Feb 22 01:08:16 2014 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id BC7DB983 for ; Sat, 22 Feb 2014 01:08:16 +0000 (UTC) Received: from mail-la0-x231.google.com (mail-la0-x231.google.com [IPv6:2a00:1450:4010:c03::231]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 2CE1011BD for ; Sat, 22 Feb 2014 01:08:16 +0000 (UTC) Received: by mail-la0-f49.google.com with SMTP id y1so2938516lam.22 for ; Fri, 21 Feb 2014 17:08:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=5C79vhZnfQ7YyDkuyTOjXw2Cr6CPOp/UlHRhb33CfOI=; b=jVsHw/WoTNL/mpVpe7USj+w+fGCF6F8L5bZg0HRKr3Kh394dxokg/XZ9a2oj9tQtLu QK7DaBD2HE8SZa4a2CkOyPsrQLWuigUTBPQPcN+bh8XqsihUolDGqJEQL5UYfsP1MWIn gq8VgHbt4QtKrsnC9QfkGz6+74Rr5E7z8kEm+w7H/gMEMm/xG/1qEL0KhVqZfhS8hIRa q08alFq52csmHgojBrEQeqy/aC7EJd9zVEfTvKPuPOQz+DmKMgbpp1zEX7V+8b6608vb +x/AI4CoHONU22d7WUqgnT6EmIVhzslLAO7Cn2EDlM8EDd9JKmHAMyklpHHOPAVkJhwF cYtg== MIME-Version: 1.0 X-Received: by 10.152.19.66 with SMTP id c2mr5854063lae.54.1393031294192; Fri, 21 Feb 2014 17:08:14 -0800 (PST) Sender: rizzo.unipi@gmail.com Received: by 10.115.4.162 with HTTP; Fri, 21 Feb 2014 17:08:14 -0800 (PST) In-Reply-To: <5307F755.4090303@huawei.com> References: <5307F755.4090303@huawei.com> Date: Fri, 21 Feb 2014 17:08:14 -0800 X-Google-Sender-Auth: GFnFeq0SWSJMEIP2owjgoLWKRNs Message-ID: Subject: Re: netmap, VALE and netmap pipes From: Luigi Rizzo To: jerry Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.17 Cc: netdev@vger.kernel.org, "freebsd-net@freebsd.org" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 22 Feb 2014 01:08:16 -0000 On Fri, Feb 21, 2014 at 5:03 PM, jerry wrote: > Hi Luigi, > > How to use netmap pipe by pkt-gen commands? > I have tried the commands as follows: > ./pkt-gen -i netmap:pipename{1 -f tx > ./pkt-gen -i netmap:pipename}1 -f rx (in another terminal) > But it works failed. > Should the pipename be replaced with a invalid NIC name such as "eth3" in > netmap mode? > netmap: expects the name of an existing device. Arbitrary names should have the 'vale' prefix e.g. ./pkt-gen -i valexx:p{0 -f tx ./pkt-gen -i valexx:p}0 -f rx > > The netmap pipe works from software ring to software ring independently > with NICs, I understand. Is that right? > > correct, but the basename is used to group ports (NICs/VALE ports and netmap pipes) that use the same shared memory so that you can do zero copy among them. cheers luigi > B.R. > Jerry > > On 2014/2/17 18:11, Luigi Rizzo wrote: > > Hi, > > we have recently made a few extensions to netmap/VALE and put various > > pieces of code on public repositories, so i thought i'd share the > > pointers. All the code below runs with equal features and performance > > on FreeBSD and Linux, and we are trying to upstream it in the relevant > > projects if possible (as an example, QEMU recently added a netmap > backend), > > at which point some of these clone repositories will become unnecessary. > > > > See http://info.iet.unipi.it/~luigi/netmap for more details. > > > > https://code.google.com/p/netmap/ > > The latest netmap code for FreeBSD/Linux. It has native support > > for certain NICs; emulated netmap over unmodified drivers; > > enhanced parallelism in the VALE switch (20 Mpps/source, scaling > > up to ~50Mpps); and a new feature called "netmap pipe" that > > does zero-copy blocking I/O at over 100 Mpps. > > Other features are the ability to allocate tons of extra > > netmap buffers, and configurable sharing of memory among NICs, > > VALE ports and netmap pipes. This increases the opportunity for > > zero copy operation. > > > > > -- -----------------------------------------+------------------------------- Prof. Luigi RIZZO, rizzo@iet.unipi.it . Dip. di Ing. dell'Informazione http://www.iet.unipi.it/~luigi/ . Universita` di Pisa TEL +39-050-2211611 . via Diotisalvi 2 Mobile +39-338-6809875 . 56122 PISA (Italy) -----------------------------------------+-------------------------------