[Info-vax] Viability of VMS in the embedded world ?, was: Re: OpenVMS x64 Atom project

[ultr...@gmail.com]

On Wednesday, June 2, 2021 at 2:05:38 PM UTC-4, Simon Clubley wrote:
> On 2021-06-01, John Dallman <j... at cix.co.uk> wrote: 
> > https://www.youtube.com/watch?v=3H6AJigJnNs 
> > 
> > Running VMS on small systems for "edge computing," which is given the 
> > clearest explanation I've encountered for that term. 
> > 
> > John
> Does anyone really think that this is a viable market for VMS ? 
> 
> How many times more expensive than the US$300 board will VMS be 
> to run on that board in a commercial environment ? 
> 
> Why would someone learn VMS for this instead of just using an 
> established bare metal or RTOS alternative ? 
> 
> Will you need to renew the VMS licence every year to keep your 
> embedded application running ? 
> 
> This is exactly the kind of application use that VAXELN was designed 
> for a generation ago (ie: VMS didn't cut it even back then) and for 
> which multiple well-established dedicated RTOS options exist these days 
> if you need something larger than a bare metal program. 
> 
> This is an example of the kind of thing that's available for free these days: 
> 
> https://www.rtems.org/ 
> 
> An example of a technical issue: 
> 
> If you are doing GPIO operations then you need a dedicated RTOS or 
> bare metal program which then talks to a larger system unless you 
> are doing something with very low bandwidth that can tolerate a high 
> degree of jitter. 
> 
> What kind of jitter are you going to see if you try driving the GPIO 
> pins directly from VMS ? 
> 
> Even ignoring jitter, then at what kind of rate will you be able 
> to drive the GPIO pins directly from VMS ? 
> 
> You will not be doing hard realtime with this setup. 
> 
> Simon. 
> 
> -- 
> Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP 
> Walking destinations on a map are further away than they appear.

the license can be incorporated into the price as a one time license purchase good for the life of the device