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Re: Windows 11 is now available

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On 2021-10-08, Anne & Lynn Wheeler <lynn@garlic.com> wrote:
> 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
>
I was too young, then. I reached first IBM when I got to practice
school programs and later in university :P

-- 

7-77-777
Evil Sinner!
with software, you repeat same experiment, expecting different results...

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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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