From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: Reg DPDK with unsupported NIC
Date: Tue, 14 Mar 2017 22:24:02 -0700
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Cc: Ferruh Yigit <ferruh.yigit@intel.com>, raman geetha gopalakrishnan
 <glowingsun@gmail.com>, dev@dpdk.org, users <users@dpdk.org>
To: Bruce Richardson <bruce.richardson@intel.com>
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On Wed, 15 Mar 2017 04:45:03 +0000
Bruce Richardson <bruce.richardson@intel.com> wrote:

> On Tue, Mar 14, 2017 at 12:07:42PM +0000, Ferruh Yigit wrote:
> > On 3/14/2017 9:28 AM, raman geetha gopalakrishnan wrote:  
> > > Hi ,
> > > 
> > > Please find my query, Currently i am planning to develop DPDK APP (linux
> > > env). I do not have DPDK supported NIC. Till then i would still like to
> > > develop DPDK APP and want DPDK  to use OS interface to TX/RX packets from
> > > NIC. How can i make it?   
> >   
> > > I went through KNI and my understanding is you
> > > cannot use it - is this correct?  
> > 
> > You can use it. KNI does not require a physical device at all.
> > 
> > But with the KNI support in main tree, you need to use KNI specific
> > APIs, - which KNI sample app shows.
> > 
> > With the KNI PMD in next-net tree, it is possible to use KNI as any
> > other device.
> >  
> 
> Just my 2c. While you can indeed use KNI here, I think I would recommend
> pcap or AF_PACKET as my first-choice options, with TAP also a
> possibility too, as Keith has already suggested.
> 
> /Bruce

Other than development environment, why would you want to use DPDK with AF_PACKET
or TAP?  It will be slower than kernel networking and with KNI doubly slow.