[Info-vax] Release of OpenVMS V9.2 for x86 Scheduled for July 14, 2022

[David Wade]

On 11/07/2022 19:26, Simon Clubley wrote:
> On 2022-07-11, Dave Froble <davef at tsoft-inc.com> wrote:
>> On 7/11/2022 2:03 PM, Simon Clubley wrote:
>>>
>>> Rather than one of the above boxes however, I would follow VSI's advice
>>> on what hardware they recommend to host your VMs running VMS. For example,
>>> take note of the fact you can only use Intel CPUs for now and cannot use
>>> AMD CPUs. (Unless that has changed _very_ recently).
>>>
>>
>> You maybe getting mixed up.  Running a VM doesn't care about mfg.  Or maybe I'm
>> mixed up.
>>
> 
> Do the VM environments emulate missing hardware instructions with reasonable
> performance levels ?

With current Hypervisors, I believe the answer is "No" The OS only sees 
the features a CPU has.

> 
> For example, what happens when the VM software is being run on a box without
> PCID support ?
> 

The OS won't be able to use it. Its been a while since I managed a big 
VM "cluster" but I seem to recall there could be issues with CPU 
generations and stepping...

> Simon.
> 

Dave