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Date: Tue, 21 Jul 2015 14:02:05 -0700
From: Stephen Hemminger <stephen@networkplumber.org>
To: "Jun Xiao" <jun.xiao@cloudnetengine.com>
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Cc: dev <dev@dpdk.org>, discuss <discuss@openvswitch.org>
Subject: Re: [dpdk-dev] vswitches performance comparison
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On Wed, 22 Jul 2015 02:00:42 +0800
"Jun Xiao" <jun.xiao@cloudnetengine.com> wrote:

> After CloudNetEngine vswitch technical preview is launched, we received quite
> a few queries on vswitches performance comparison, but we cannot simply give a
>  test result on our platform because performance varies on different H/Ws and
> different workloads, and that's why we encourage you to try the evaluation 
> package to get real data on your setup.
> 
> Anyway, we share a little more performance data on our H/W which is a comparison
>  among native kernel OVS/OVS-DPDK/CNE vswitch under the most common workload:
> concurrent bi-directional TCP traffics cross hosts, and hope you can have a rough idea.
> http://www.cloudnetengine.com/weblog/2015/07/22/vswitches-performance-comparison/
> 
> Thanks,
> Jun

Since the real bottleneck in most vswitches is per-packet overhead.
I would recommend running RFC-2544 tests for better data.

You probably need to use something like pktgen to get enough packets-per-second.