[Info-vax] VMS x86 performance ?

[Arne Vajhøj]

On 10/30/2020 11:38 AM, Grant Taylor wrote:
> On 10/30/20 8:48 AM, Arne Vajhøj wrote:
>> When talking performance for VMS x86-64 I think we need to define what 
>> we are talking about.
> 
> Isn't this where a VUP comes into play?

As explained below not necessarily.

>> absolute performance on VMS x86-64 vs Linux x86-64 same HW or VM
> 
> Why would you want to cross operating systems at this stage?  I'd think 
> it would be better to stick with OpenVMS.

Nobody is talking about switching OS.

But if one is interested in comparing the performance of VMS and
its compilers with other platforms then comparing them on the
same HW would be a relevant metric.

>> absolute performance on VMS x86-64 some VM expected to be typical vs 
>> VMS Alpha some typical 15-20 year old box
>>
>> absolute performance on VMS x86-64 some VM expected to be typical vs 
>> VMS Itanium some typical 5-10 year old box
> 
> These two tests seem to fall back to VUPs to me.

Somewhat yes.

>> relative performance per cost on VMS x86-64 standard HW vs VMS Itanium 
>> on latest HP box
> 
> "x86-64 standard HW" seems like a misnomer to me.  A LOT of different 
> things can fall into that broad description, anything from a low end 
> college student notebook from 10 years ago to the contemporary 
> virtualization power house system.

Notesbooks are obviously not relevant. This is about servers.

The type of HW that IT departments buy from HPE/Dell/Lenovo
to run ESXi and a bunch of VM's on.

I believe it is a rather competitive market. Which means
that the price difference between vendors will be relative small.

Arne