Groups > alt.folklore.computers > #236699

Re: My Computer History (Re: Is This An Old Folks Home?)

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From	Lynn Wheeler <lynn@garlic.com>
Newsgroups	alt.folklore.computers, comp.os.linux.misc
Subject	Re: My Computer History (Re: Is This An Old Folks Home?)
Date	Mon, 09 Nov 2026 07:48:09 -1000
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Cross-posted to 2 groups.

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Lars Poulsen <lars@beagle-ears.com> writes:
> Back in my University Computer Center days, a few of us attended a
> class in London on debugging paradigms. On the first day, we
> introduced ourselves and described our workplace's significant
> computer systems. One of the attendeed was from IBM Grenoble, and as
> he described their main system with a whopping 16MB of main memory, we
> all oohed and aahed and wondered aloud how anyone could make
> productive use of that much memory. But he explained that they easily
> used it all up with their static analysis tools, their version control
> system, their auditing programs making sure the programs adhered to
> their programming standards etc. We all shook our heads at how IBM
> clearly had too much money on their hands if they could spend it on
> such frills!!

I was undergraduate when 360/67 arrived and hired originally full-time
responsible for OS/360 (360/67, running as 360/65).

Then CSC came out to install (virtual machine) CP/67 (3rd after CSC
itself and MIT Lincoln Labs) and I mostly get to play with it during my
weekend 48hr window. I then spend a few months rewriting pathlengths for
running OS/360 in virtual machine. Bare machine test ran 322secs
... initially 856secs (CP67 CPU 534secs). After a few months I had CP67
CPU down from 534secs to 113secs. I then start rewriting the
dispatcher/scheduler (dynamic adaptive resource manager/default fair
share scheduling policy), paging, adding ordered seek queuing (from
FIFO) and mutli-page transfer channel programs (from FIFO and optimized
for transfers/revolution, getting 2301 paging drum from 70-80 4k
transfers/sec to channel transfer peak of 270). I was invited to spring
SHARE meeting in Houston for "official" CP67/CMS announcement. Six
months after univ initial CP/67 install, CSC was giving one week class
in LA. I arrive on Sunday afternoon and asked to teach the class, it
turns out that the people that were going to teach it had resigned the
Friday before to join one of the 60s CSC CP67 commercial online
spin-offs.

Then before I graduate, I was hired into small group in Boeing CFO
office to help with the formation of Boeing Computer Services
(consolidate all dataprocessing into independent business unit). When I
graduate I join the IBM Cambridge Scientific Center that had 768kbyte
360/67 (104 pageable 4k pages, and I upgrade the page replacement
algorithm with my global "LRU" algorithm).

Then Grenoble Science Center got a 1mbyte 360/67 (155 pageable 4k pages)
running CP67/CMS and modify page replacement to local "LRU" algorithm
from 60s academic literature. Both centers had similar CMS workload,
except I got 75-80 users with better response and throughput than
Grenoble running 35 users.

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

Thread

My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-06 18:37 -0800
  Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-07 00:51 -0500
    Re: My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-07 06:20 -0800
      Re: My Computer History (Re: Is This An Old Folks Home?) Peter Flass <Peter@Iron-Spring.com> - 2026-11-07 07:38 -0700
      Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-08 02:47 +0000
    Re: My Computer History (Re: Is This An Old Folks Home?) Peter Flass <Peter@Iron-Spring.com> - 2026-11-07 07:31 -0700
      Re: My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-07 06:52 -0800
        Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-07 20:09 -0500
          Re: My Computer History (Re: Is This An Old Folks Home?) Thomas Koenig <tkoenig@netcologne.de> - 2026-11-08 08:08 +0000
            Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-08 21:24 -0500
              Re: My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-08 18:34 -0800
                Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-08 22:54 -0500
                Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-09 04:39 +0000
                Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 21:08 -0500
                Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-10 02:25 +0000
                Re: My Computer History Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-11-10 02:32 +0000
                Re: My Computer History c186282 <c186282@nnada.net> - 2026-11-09 23:07 -0500
                Re: My Computer History Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-10 18:36 +0000
                Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 22:49 -0500
                Re: My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-10 06:03 -0800
                Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-10 18:36 +0000
                Re: My Computer History (Re: Is This An Old Folks Home?) scott@slp53.sl.home (Scott Lurndal) - 2026-11-10 15:08 +0000
                Re: My Computer History (Re: Is This An Old Folks Home?) Peter Flass <Peter@Iron-Spring.com> - 2026-11-09 07:29 -0700
                Re: My Computer History (Re: Is This An Old Folks Home?) The Natural Philosopher <tnp@invalid.invalid> - 2026-11-09 16:11 +0000
                Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 21:19 -0500
                Re: My Computer History (Re: Is This An Old Folks Home?) Bob Eager <throwaway0008@eager.cx> - 2026-11-10 14:31 +0000
                Re: My Computer History (Re: Is This An Old Folks Home?) Lynn Wheeler <lynn@garlic.com> - 2026-11-09 07:48 -1000
                Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 21:55 -0500
                Re: My Computer History (Re: Is This An Old Folks Home?) Peter Flass <Peter@Iron-Spring.com> - 2026-11-09 21:35 -0700
              Re: spooling, My Computer History (Re: Is This An Old Folks Home?) John Levine <johnl@taugh.com> - 2026-11-09 16:56 +0000
                Re: spooling, My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 21:46 -0500

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