[Info-vax] Some VMS/x86 perf test data from WASD maintainer.

[Simon Clubley]

On 2023-04-28, Jan-Erik Söderholm <jan-erik.soderholm at telia.com> wrote:
> Den 2023-04-28 kl. 14:22, skrev Simon Clubley:
>> On 2023-04-28, Volker Halle <volker_halle at hotmail.com> wrote:
>>>
>>> We can continue the VUPS discussion here, but should discuss the KERNEL mode question in the VSI forum.
>>>   
>> 
>> Why ? The Kernel mode overhead is the real issue that needs discussing,
>> not some artificial CPU speed test.
>> 
>
> Why? That should be very obvious.
>
> There is already an ongoing diskussion over at the Forum about this.
> The posts and code posted are much eiser to read.
> Much better thread history.
>
> If the kernel overhead is viewed as "the real problem", it is better
> disussed on the Forum, not here...

That forum post has yet to reveal any meaningful information about
what is going on here and why the kernel mode percentage is so high.

The fact VSI have not yet offered any immediate answers along the lines
of "Oh, don't worry, it's just {X} at play. It will be sorted in a few
months..." is of concern.

I wonder if this is the general level of kernel mode overhead we are now
going to be seeing on x86-64 VMS (and we don't even have any AMD numbers yet).

I do have a related question, but I will ask that in another thread.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.