Re: OT: netmap - a novel framework for fast packet I/O

[Ira Weiny <weiny2-i2BcT+NCU+M@public.gmane.org>]

On Fri, 20 Jan 2012 06:18:44 -0800
"Atchley, Scott" <atchleyes-1Heg1YXhbW8@public.gmane.org> wrote:

> Interesting. It totally hijacks the NIC; all traffic is captured. You would have to implement your own IP stack, Verbs stack, etc.
> 

Can multiple user space processes share the card?  If so, how is security handled between them?

Ira

> Scott
> 
> On Jan 19, 2012, at 11:50 AM, Yann Droneaud wrote:
> 
> > Hi,
> > 
> > I have discovered today the netmap project[1] through an ACM Queue
> > article[2].
> > 
> > Netmap is a new interface to send and receive packets through an
> > Ethernet interface (NIC). It seems to provide a raw access to network
> > interface in order to process packets at high rate with a low overhead.
> > 
> > This is an another example of "kernel-bypass"/"zero-copy" which are core
> > features of InfiniBand verbs/RDMA.
> > 
> > But unlike InfiniBand verbs/RDMA, Netmap seems to have a very small API.
> > 
> > Such API could be enough to build an unreliable datagram messaging
> > system on "low cost" hardware (without concerns of determinism, flow
> > control, etc.).
> > 
> > I'm asking myself if the way netmap exposes internal NIC rings could be
> > applicable for IB/IBoE HCA ? e.g. beyond 10GbE NIC, is netmap relevant ?
> > 
> > Regards.
> > 
> > [1] http://info.iet.unipi.it/~luigi/netmap/
> > 
> > netmap - a novel framework for fast packet I/O
> > Luigi Rizzo Università di Pisa
> > 
> > [2] http://queue.acm.org/detail.cfm?id=2103536
> > 
> > Revisiting Network I/O APIs: The netmap Framework 
> > Luigi Rizzo, 2012-01-17  
> > 
> > -- 
> > Yann Droneaud
> > 
> > 
> > --
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-- 
Ira Weiny
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Lawrence Livermore National Lab
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