[Info-vax] clock problems with OpenVMS x86 on VirtualBox

[Simon Clubley]

On 2023-05-13, Arne Vajhøj <arne at vajhoej.dk> wrote:
>
> VAX got real time priorities 16-31.
>
> Alpha got real time priorities 16-63.
>
> I assume Itanium and x86-64 has 16-63 as well.
>
> But I believe there is more to real time than
> having those (no quantum end and no dynamic
> adjustment).
>

Real-time at its core is about meeting timing deadlines.

If you miss the odd timing deadline and can still function (maybe in
a degraded way), it's called soft real-time.

If you miss a timing deadline and hence go BOOM!!! (or even fully fail
in a less dramatic way :-)), it's called hard real-time.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.