[Info-vax] Real time performance, was: Re: VSI: "Official 8.4-1H1 Launch"

[David Froble]

JF Mezei wrote:
> On 15-06-07 08:09, Simon Clubley wrote:
> 
>> You have made this mistake before JF, so once again:
>>
>> Real time does not mean fast; it means a guaranteed bounded response time.
> 
> 
> The context of this was making primitive VMS boot as a guest of a VM to
> help VSI engineers get it to boot to the DIR command.
> 
> We're not talking about getting VMS to run the space shuttle control
> system during a launch under a VM that also runs Windows with users
> playing video games.
> 
> In fact, when you debug primitive code, you probably want it to run very
> slowly and (maybe) have the ability to stop it midway so debugging tools
> can be used to look at memory etc,
> 
> 
> 

If I had to guess, I'd say the native stuff will exist before they add 
stuff for running in a VM.  It still will be executing on x86, not in 
emulation.  You still need something that runs on x86 before you can run 
it on x86 in a VM.