From mboxrd@z Thu Jan 1 00:00:00 1970 From: jerry Subject: Re: netmap, VALE and netmap pipes Date: Sat, 22 Feb 2014 09:03:17 +0800 Message-ID: <5307F755.4090303@huawei.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit To: Luigi Rizzo , , "freebsd-net@freebsd.org" Return-path: Received: from szxga03-in.huawei.com ([119.145.14.66]:27206 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751447AbaBVBD1 (ORCPT ); Fri, 21 Feb 2014 20:03:27 -0500 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: 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? The netmap pipe works from software ring to software ring independently with NICs, I understand. Is that right? 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.