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Re: Windows 11 is now available

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Branimir Maksimovic <branimir.maksimovic@icloud.com> writes:
> Well on unisys you could connect more then 100 terminals
> on machine with only 4mb of ram,
> because terminals had logic for input, and all that
> was exchanged was just packets sent :P

Original CP67 was installed at univ. in Jan1968 by three people from
cambridge science center ... could play with it on weekends on 360/67 with
768kbytes memory. The TSS/360 IBM SE and I put together synthetic
fortran, compile, and execute benchmark ... and CP67/CMS with 35
emulated users had better response time and throughput than TSS/360
(on same machine) with only four users.

Later after rewritting a lot of CP67 (pathlengths, resource management,
scheduling, "global LRU" page replacement, page I/O, ordered seek
queuing, etc), graduating and joining the cambridge science center
... had 85 real users on 768kbyte (192 4k pages) 360/67 (104 4k pageable
pages after fixed kernel and control block storage) had subsecond
response and 100% CPU useage.

This was important because the Grenoble Science Center had modified CP67
to have a "working set dispatcher" ("local LRU" page replacement, from
1968 academic papers) running on 1mbyte (256 4k pages) with 35 (real)
users had worse response and lower CPU useage (aka "global LRU" page
replacement easily beat "local LRU" page replacement).

This came up more than decade later, Jim Gray and left IBM San Jose
Research for Tandem and at SIGOPS (Asilomar, 14-16Dec81), he asked me if
I could help co-worker at Tandem get his Stanford PHD (advisor was later
president of Stanford) which involved "global LRU" (page replacement),
and he knew I had down a lot of work on global LRU page replacement
algorithm and had apple-to-apple comparison between local and global LRU
(as undergraduate in the 60s). Some of the "local LRU" forces (dating
back to 60s when I was doing "global LRU") were heavily lobbying
Stanford to block awarding PHD involving global LRU.

When I went to send information ... SJR management said that I wasn't
allowed to (even tho none of the information involved anything after
joining IBM). I've commented that I hoped that it was done as punishment
for online computer conferencing ("Tandem Memos", in the late 70s I was
blamed for online computer conferencing on the internal network,
folklore is when corporate executive committee was told about it, 5of6
wanted to fire me) ... rather than they taking part in the global/local
LRU academic dispute. I wasn't allowed to send reply for nearly a year
http://www.garlic.com/~lynn/2006w.html#email821019

-- 
virtualization experience starting Jan1968, online at home since Mar1970

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Re: Windows 11 is now available "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-10-07 10:25 +0100
  Re: Windows 11 is now available Quadibloc <jsavard@ecn.ab.ca> - 2021-10-07 21:49 -0700
    Re: Windows 11 is now available Branimir Maksimovic <branimir.maksimovic@icloud.com> - 2021-10-08 04:53 +0000
      Re: Windows 11 is now available "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-10-08 13:13 +0100
        Re: Windows 11 is now available Andy Walker <anw@cuboid.co.uk> - 2021-10-08 19:40 +0100
          Re: Windows 11 is now available "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-10-08 20:55 +0100
        Re: Windows 11 is now available Ahem A Rivet's Shot <steveo@eircom.net> - 2021-10-08 20:30 +0100
          Re: Windows 11 is now available Branimir Maksimovic <branimir.maksimovic@icloud.com> - 2021-10-09 08:15 +0000
          Re: Windows 11 is now available "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-10-09 11:37 +0100
        Re: Windows 11 is now available Branimir Maksimovic <branimir.maksimovic@icloud.com> - 2021-10-09 08:11 +0000
        Re: Windows 11 is now available Bob Eager <news0009@eager.cx> - 2021-10-09 23:40 +0000
          Re: Windows 11 is now available Andy Walker <anw@cuboid.co.uk> - 2021-10-10 01:29 +0100
            Re: Windows 11 is now available Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-10-10 17:34 +0000
              Re: Windows 11 is now available "Kerr-Mudd, John" <admin@127.0.0.1> - 2021-10-10 19:39 +0100
          Re: Windows 11 is now available J. Clarke <jclarke.873638@gmail.com> - 2021-10-09 20:45 -0400
      Re: Windows 11 is now available Anne & Lynn Wheeler <lynn@garlic.com> - 2021-10-08 08:35 -1000
        Re: Windows 11 is now available Anne & Lynn Wheeler <lynn@garlic.com> - 2021-10-08 11:57 -1000
        Re: Windows 11 is now available Branimir Maksimovic <branimir.maksimovic@icloud.com> - 2021-10-09 08:14 +0000

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