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

[Simon Clubley]

On 2023-05-12, Dave Froble <davef at tsoft-inc.com> wrote:
> On 5/12/2023 8:14 AM, Simon Clubley wrote:
>> On 2023-05-12, Jan-Erik Söderholm <jan-erik.soderholm at telia.com> wrote:
>>>
>>> Actually, that was how I thought it worked. Since I observed that
>>> the clock in my VirtualBox VMS environment lagge a bit behind
>>> but each 10-20 sec, it jumpt ahead and skipped a second so that
>>> it become in sync with the host Windows environment again.
>>>
>>
>> That's going to make for some "interesting" real-time program behaviour... :-)
>>
>> Simon.
>>
>
> Do you think any serious real time programmer will run a real time task inside a 
> VM?  I'm not a real time programmer, and I'd still not do that.
>

As well as traditional real-time stuff (which I agree with you about BTW),
there's also communications with external devices and the timestamping of
received messages, both of which could be affected by such jumps.

Simon.

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