Jan Kiszka wrote:
> Hi Gilles,
>
> Gilles Chanteperdrix wrote:
> > Hi,
> >
> > I am asked to run a real-time networking application on a non real-time
> > network, so, I naturally thought about using RTnet.
> >
> > But unless I am completely mistaken, it is not what RTnet is originally
> > made for. As far as I understood, in an RTnet network, the non real-time
> > trafic is tunneled through the real-time traffic by adding an rtmac
> > header with the RTMAC_FLAG_TUNNEL flag set. But since the other nodes on
> > the network I am on are non-rt, they do not understand the rtmac header.
>
> Before I misunderstand your patch: you run RTmac/TDMA on a non-RT
> network and you then need to use the tunnel (also) between RT and non-RT
> nodes? Have you considered the rtnetproxy as platform for your solution
> as well? Or do you see your approach as a potential replacement for the
> proxy?
My aim is to run an RTnet node on a non real-time network, in order for
real-time applications to avoid loosing determinism when they transmit
or receive packets over network. But I would like the rest of the system
to continue working as if RTnet was not there. I have tried rtnetproxy,
but with rtnetproxy, arp requests/replies do not work, so that my non
real-time applications do not work.
So far, I have only tried to get the non real-time stuff working, so I
am using the NOMAC discipline, and I suspect the patch I sent does not
work with anything else. I even suspect that it does not work at all,
since I am getting kernel bugs, and am not sure whether they are due to
this patch, or to my real-time ethernet driver implementation.
Anyway, I am open to any better solution.
--
Gilles Chanteperdrix.
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