From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sridhar Samudrala Subject: Re: [PATCH v2 net-next] inet: fix a UFO regression Date: Fri, 08 Nov 2013 12:20:30 -0800 Message-ID: <527D478E.4020607@gmail.com> References: <527C877D.3080309@gmail.com> <1383913124.9412.223.camel@edumazet-glaptop2.roam.corp.google.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Alexei Starovoitov , David Miller , netdev@vger.kernel.org, Hannes Frederic Sowa To: Eric Dumazet Return-path: Received: from mail-oa0-f43.google.com ([209.85.219.43]:52755 "EHLO mail-oa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757521Ab3KHUUT (ORCPT ); Fri, 8 Nov 2013 15:20:19 -0500 Received: by mail-oa0-f43.google.com with SMTP id g12so1293149oah.30 for ; Fri, 08 Nov 2013 12:20:19 -0800 (PST) In-Reply-To: <1383913124.9412.223.camel@edumazet-glaptop2.roam.corp.google.com> Sender: netdev-owner@vger.kernel.org List-ID: On 11/8/2013 4:18 AM, Eric Dumazet wrote: > On Thu, 2013-11-07 at 22:41 -0800, Sridhar Samudrala wrote: > >> Does this fix also help vxlan performance between 2 VMs on 2 different >> physical m/cs across 10G NIC? >> What is the throughput you are seeing via 10G nics? >> With linux 3.12, i am only seeing around 2Gbps (iperf TCP_STREAM with >> 16K messages) between 2 VMs when using vxlan across a 10G nic. >> Is this due to the overhead of software GSO and not doing GRO at the >> receiver? > What NIC is used at sender, what NIC is used at receiver ? I am seeing almost similar results with both Emulex and Intel 10Gb NICs at both sender and receiver. > > If you use GRE instead of VXLAN, do you get any difference in speed ? With GRE, i am seeing slightly better results. 3.2Gb/s compared to 1.8Gb/s with vxlan. Thanks Sridhar