[Info-vax] VUPs on Pi Zero 2 - was Re: VSI VMS V8.4-2L2 availability?

[Dave Froble]

On 11/12/2021 5:40 PM, Mark Daniel wrote:
> On 13/11/21 8:44 am, Paul Hardy wrote:
>> Slo <slovuj at gmail.com> wrote:
>> …
>>> By the way, FreeAXP = 42, XP100 = 318 VUPs.
>>
>> Coincidentally I found today that if I run SimH with  VMS 5.5-2H4 on a
>> Raspberry Pi Zero 2 W, I get 3.7 VUPs, which is pretty identical to the
>> VAXstation 3100M38 that it is emulating.  Hardware cost is $15 and size
>> tiny. A throwaway VAX! See
>> https://www.raspberrypi.com/products/raspberry-pi-zero-2-w/.
>>
>> Actually, as it’s a quad-core cpu, I could probably run a cluster of three
>> or four instances on it for $15!
>
> Not challenging the value-for-money of the above unit but recently I was curious
> how my seven-year-old, dual core, 2.7GHz i5 (macOS 12.0.1) compared to my 20+
> year workhorse PWS500.
>
> Digital Personal WorkStation with 1 CPU and 1536MB running VMS V8.4-2L1
> Approximate System VUPs Rating : 159.0 ( min: 159.0 max: 159.0 )
>
> innotek GmbH VirtualBox with 2 CPU and 3584MB running VMS V9.1-A
> Approximate System VUPs Rating : 199.1 ( min: 195.8 max: 204.2 )
>
> So moving to a (virtual) instance of VMS won't cost me anything performance-wise
> even if on this humble laptop.  BTW: running two concurrent VUPS.COM produces
> much the same result.
>
> For comparison...
>
> HP rx2660 (1.40GHz/6.0MB) with 4 CPU and 14335MB running VMS V8.4-2L1
> INFO: Preventing endless loop (10$) on fast CPUs
> Approximate System VUPs Rating : 495.1 ( min: 487.2 max: 499.6 )
>

This reliance on a DCL procedure to calculate VUPS isn't very reliable, other 
than comparing the same command procedure on different systems to see the 
difference.

I have two command procedures, CALCULATE_VUPS.COM and CALCVUPS.COM.  They sure 
don't agree with each other.

$ show lic/cha
VMS/LMF Charge Information for node DFE90A
This is a VAXstation 4000-90A, hardware model type 475
$ @calcvups
Approximate System VUPs Rating :  27.0
---------------------------------------------------------
AS800> show lic/cha
VMS/LMF Charge Information for node AS800
This is a AlphaServer 800 5/500, hardware model type 1585
AS800> @calcvups
Approximate System VUPs Rating :  141.8
---------------------------------------------------------

and

on the VAXstation 4000-90A
$ @calculate_vups
  Approximate System VUPs Rating : 109.0 ( min: 109.0 max: 109.0 )

on the AlphaServer 800
AS800> @calculate_vups
  Approximate System VUPs Rating : 516.0 ( min: 516.0 max: 516.0 )

So the gain of the AlphaServer over the VAXstation is about a factor of 4, using 
the CALCVUPS.COM procedure, while the factor with CALCULATE_VUPS.COM is about 
3.6.  Ok, not too far off.  However, consider the claims of performance sure is 
a large difference between the two procedures.  Don't know why.

Seems as if using either procedure can show differences, but not to be trusted 
for showing total performance.

Now I think I'll see what the RX2660 has ...

Itanic> @calcvups
Approximate System VUPs Rating :  594.0
Itanic> @calculate_vups
INFO: Preventing endless loop (10$) on fast CPUs
  Approximate System VUPs Rating : 2410.7 ( min: 2410.0 max: 2413.0 )

Again, the difference between the procedures is about a factor of 4.

Ok to use to see the Itanic is about 5 times the performance (using these 
procedures) of the AlphaStation.  Ain't process shrinks wonderful?

Just don't trust the totals ...

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
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170 Grimplin Road
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