[Info-vax] VMS x86 performance ?

[Simon Clubley]

On 2020-11-03, Bill Gunshannon <bill.gunshannon at gmail.com> wrote:
> On 11/3/20 11:10 AM, Dave Froble wrote:
>> On 11/3/2020 10:32 AM, Bill Gunshannon wrote:
>>> It seems anytime people compare "the good ole days" they compare
>>> 1970's systems to 2020 systems without allowing for differences like
>>> changes in hardware technology.  If RSTS had been handled like VMS
>>> it would be running on X86-64, using GB's of memory and modified to
>>> take advantage of the new hardware without abandoning the underlying
>>> philosophy of the OS.
>> 
>> Only if it had expanded the addressing ....
>
> Every OS I have ever worked with that moved forward to a hardware
> platform with larger address space took advantage of it.  Didn't
> VMS when it went from VAX to Alpha and Itanium?  BSD certainly did.
> And Linux.  And OS-9.
>
> bill
>

I don't know about OS-9, but it was a lot easier to expand the usable
address space on the BSDs and Linux than it was on VMS. We've discussed
the reasons for this in detail in the past, so I am not going to resurrect
_that_ discussion again. :-)

Simon.

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