[okl4-developer] (nb) What should be done to create an interface?

[Nelson Tam]

Hi Antonin,

On 31/03/2008, at 7:00 PM, Antonin SUBTIL wrote:
>
> Following Remy Gottschalk's talk of Iguana server, I have a question  
> (that I cannot answer from just looking the mails).
>
> What should be done to create a new interface ?
> I mean, what should I do to paravirtualize my own real-time OS for  
> OKL4? Is it better to put my RTOS on top of L4 µkernel or on top of  
> L4+Iguana ? (Iguana seems to be better, yet I'm not sure of  
> determinism inside)


We'd strongly recommend using OKL4 (i.e. L4 kernel + Iguana) for  
several reasons:

1. After the L4 kernel boots, a privileged root server thread is  
created.  OKL4 picks up from there and performs a lot more other  
useful work to bootstrap into a functional OS.

2. We have written a lot of supporting libraries and frameworks, for  
example the device driver framework, which requires OKL4.

3. OKL4 is a pre-requisite for OKLinux.

4. OKL4 preserves the kernel scheduling behaviour, which you will rely  
on when programming a real-time server.  I think this is what you mean  
by determinism.

--
(nt)

Nelson Tam

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