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Date: Tue, 27 Sep 2011 17:10:09 +0200
From: Richard Cochran <richardcochran@domain.hid>
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Subject: Re: [Xenomai-core] [RFC 0/1] Class driver for raw Ethernet packets
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To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>

On Tue, Sep 27, 2011 at 02:20:43PM +0200, Jan Kiszka wrote:
> On 2011-09-27 14:01, Richard Cochran wrote:
> > Again, every MAC driver needs to be tastefully and wisely adapted. I
> > don't necessarily need to avoid coalescing. The goal (for me) is *not*
> > to provide deterministic Ethernet performance. Instead the RT packets
> > should just be delivered ASAP.
> 
> This is obviously the point I completely missed. And it makes the whole
> thing fairly uninteresting IMHO. If you want to do Ethercat, PowerLink
> or Profinet (RT), you do need a certain level of determinism along the
> *whole* packet path. And for the latter two, you definitely need RT IRQ
> support, Ethercat can be OK to poll in fast setups.
> 
> From that POV, your approach is likely OK. But I doubt its of generic
> use, specifically for industrial RT Ethernet.

So, how does rtnet support EtherCAT?

Does it support PowerLink and Profinet?

Thanks,
Richard