Re: HOOD?

[john@assen.demon.co.uk (John McCabe)]

Jean-Marie Wallut <Jean-Marie.Wallut@CST.CNES.FR> wrote:

>In our previous message we used "we" because we were two of us writing
>(jean-Marie Wallut & Denis Minguillon). We didn't think we were expessing
>the opinion of CNES poeple but only our vue as responsible of development
>methods.

Thank you for that clarification.

>We agree with John McCabe when he says that the hierarchical aspect can
>bring some inefficiency in the resulting code. But we also think that coding
>style and performance always need a compromise. This compromise is not the
>same depending on the fact that the software to design is an onboard
>realtime software with strong constraints or a piece of ground segment.
>However the compromise is always possible. One can design a hierarchical
>solution and then, making sure he respects it, find some bypasses to enhance
>performance (supress parent level for example).

I do agree here. My own point of view (which I obviously haven't
explained clearly) is from an on-board realtime system with very tight
time constraints so this may help to explain where my views are
derived from.


Best Regards
John McCabe <john@assen.demon.co.uk>