From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net] veth: add vlan features Date: Fri, 19 Jul 2013 17:37:43 -0700 (PDT) Message-ID: <20130719.173743.1638667044880555527.davem@davemloft.net> References: <1374174911-6435-1-git-send-email-fbl@redhat.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: fbl@redhat.com Return-path: Received: from shards.monkeyblade.net ([149.20.54.216]:54461 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753219Ab3GTAhn (ORCPT ); Fri, 19 Jul 2013 20:37:43 -0400 In-Reply-To: <1374174911-6435-1-git-send-email-fbl@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Flavio Leitner Date: Thu, 18 Jul 2013 16:15:11 -0300 > The veth device doesn't provide the vlan features, > so TSO for example is disabled and that causes > performance issues when using tagged traffic. > > The test topology looks like this: > > br0 br1 > / \ / \ > vnet veth0.10 ----- veth1.10 vnet > VM VM > > The netperf results with current veth driver: > MIGRATED TCP STREAM TEST from 192.168.1.1 () > port 0 AF_INET to 192.168.1.2 () port 0 AF_INET > Recv Send Send > Socket Socket Message Elapsed > Size Size Size Time Throughput > bytes bytes bytes secs. 10^6bits/sec > > 87380 16384 16384 10.01 2210.22 > > Now after applying the proposed patch: > MIGRATED TCP STREAM TEST from 192.168.1.1 () > port 0 AF_INET to 192.168.1.2 () port 0 AF_INET > Recv Send Send > Socket Socket Message Elapsed > Size Size Size Time Throughput > bytes bytes bytes secs. 10^6bits/sec > > 87380 16384 16384 10.00 13067.47 > > Signed-off-by: Flavio Leitner Applied.