Re: Announce: The Ultimate SI Units Cracker

["Grein, Christoph" <christoph.grein@eurocopter.com>]

> Also note that the page seems to make the somewhat incorrect assumption
> that hard real-time implies "fast".
> 
> Hard real-time just means you can never miss a deadline (where soft
> real-time
> means that you can sometimes miss some deadlines but not often).
> 
> While these terms vary from author to author, it has been my experience that
> these are pretty close to the generally accepted definitions.

As I have always heard the term being used, hard RT meant short cycle times (50Hz), 
soft RT meant long times (weather forecast _is_ time-critical, but the limit is 
one day or so).

I'm in the avionics business and we always call our system hard-real time.
OK, it must not miss a deadline, and it must be fast. So it fulfills both 
definitions.