[Info-vax] Volatile, was: Re: yet another sys$qiow question

[David Froble]

JF Mezei wrote:
> The reason I had been given for not using ASTs and using a loop for hard
> real time was that they could ensure timing on a known event loop while
> AST delivery was unpredictable since something else could stop AST
> deliveries and delay processing etc.

And did they claim that NOTHING could interrupt their loop?  I think elevated 
IPL, higher priority, and such could shoot that argument down.

Unless they were on some primitive equipment without those things ....

> (Just recounting what I was told).
> 
> Similarly, on space station, they used a very old military slow network
> type that is polled at predictable times because they felt ethernet was
> unpredictable because you might have a collision. (not considering the
> fact that with Ethernet 100 times faster than that military protocol
> would have no problem handling the load generated by those devices).
> 
> 

Oxymoron, military intelligence ....

Or, even, human intelligence ....