From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755436Ab2A0F7v (ORCPT ); Fri, 27 Jan 2012 00:59:51 -0500 Received: from mail-wi0-f174.google.com ([209.85.212.174]:58166 "EHLO mail-wi0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752313Ab2A0F7t (ORCPT ); Fri, 27 Jan 2012 00:59:49 -0500 Message-ID: <1327643984.2919.6.camel@edumazet-laptop> Subject: Re: [patch v4, kernel version 3.2.1] net/ipv4/ip_gre: Ethernet multipoint GRE over IP From: Eric Dumazet To: Joseph Glanville Cc: David Miller , steweg@ynet.sk, jesse@nicira.com, kuznet@ms2.inr.ac.ru, jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Date: Fri, 27 Jan 2012 06:59:44 +0100 In-Reply-To: References: <20120125.203746.1977019610549185259.davem@davemloft.net> <20120126.133033.964571202129052712.davem@davemloft.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.2- Content-Transfer-Encoding: 8bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le vendredi 27 janvier 2012 à 09:24 +1100, Joseph Glanville a écrit : > David is correct, the forwarding speed of Open vSwitch is at parity > with the Linux Bridging module and its tunneling speed is actually > slightly faster than the in kernel GRE implementation. I have tested > this across a variety of configurations. Thanks for this input ! When was this tested exactly, and do you have some "perf tool" reports to provide ? GRE is lockless since one year or so (modulo how is setup the tunnel as discovered recently) Also please note that openvSwitch is said to be fast path only on established flows.