real time app on l4linux

cem akpolat akpolatcem at gmail.com
Fri Dec 11 00:26:51 CET 2015


Hi Adam,

with the real time I was talking about the short response times such as if
an operation takes in linux 1 second, my expectation from microkernel, is
to have less then 1 second. Especially, for the embedded system, where the
microkernel can undertake a critical role, the duration of response time is
extremely important. If you mean, the example will be running separately
will give the same performance, then it is needless to implement it and in
this case my logic is totally wrong! Because with the real time, i was
comparing l4linux with rtlinux.

Thanks for your response!


Cem Akpolat

On Thu, Dec 10, 2015 at 11:18 PM, Adam Lackorzynski <
adam at os.inf.tu-dresden.de> wrote:

> Hi,
>
> On Tue Dec 08, 2015 at 14:18:17 +0100, cem akpolat wrote:
> > I want to ask, if you have any guide or documentation, how to write a
> real
> > time app on l4linux. As you know, l4llinux doesn't guarantee whether the
> > application .which run on top of it, will be close to real time or not.
> In
> > this case, should we write an separate l4 app and communicate with
> l4linux
> > over IPC? If yes, again, how can I implement this kind of an app. For
> > instance, if we take the server-client app under examples folder, can we
> > apply the same scenario? How can I communicate with L4Linux?
>
> L4Linux is as real-time as any other virtualized Linux is, so yes, you
> probably want to have real-time work separate from Linux.
> L4Linux has a server interface which can be used to implement services.
> Look at arch/l4/server for examples. It's a bit more complicated because
> of the mixture of C and C++ but look at the input-srv file as the most
> simple example.
>
>
>
> Adam
> --
> Adam                 adam at os.inf.tu-dresden.de
>   Lackorzynski         http://os.inf.tu-dresden.de/~adam/
>
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