[Info-vax] VAX 6000 on Young Sheldon

[Arne Vajhøj]

On 2/7/2023 10:04 AM, Johnny Billquist wrote:
> On 2023-02-07 01:52, Arne Vajhøj wrote:
>> On 2/6/2023 8:04 AM, Neil Rieck wrote:
>>> VAX-6000 was the first time I encountered SMP (symmetric multi
>>> processing) on VAX. We were running a 6430 which meant 3 CPUs
>>>
>>> Before that I worked for a year on a pair of VAX-8550 configured as a
>>> VAXcluster
>>>
>>> Our VAX-6430 system felt faster than the pair of clustered VAX-8550
>>
>> Based on VUPS ratings then I would expect:
>> - multi job throughput to be the same
>> - single job execution slower
>> - interactive responsiveness better
> 
> Uh? The 64x0 single CPU VUPS rating is 7.0, while the 8550 is rated at 
> 6.0 VUPS, so I would expect the 6430 to be faster for individual jobs, 
> as well as *way* better at handling load, since you actually have three 
> CPUs compared to just one on the 8550. Clustering two 8550 would not get 
> close to a 3 cpu 64x0.

Ooops.

You are correct.

I looked at the 63x0 instead of the 64x0 number.

The 6430 is faster in every way than 2 x 8550.

Mea culpa.

Arne