Groups > alt.folklore.computers > #156578

Re: IBM STRETCH repricing decision?

Newsgroups	alt.folklore.computers
Date	2016-01-12 23:37 -0800
References	<be792ee4-dda9-413c-a9c3-e6ad71b9fa47@googlegroups.com> <353e6d8e-eab6-46f1-b579-8ee24379f6e0@googlegroups.com> <16b10215-5707-4848-b9dc-74ff48b76b9a@googlegroups.com>
Message-ID	<b631c78b-ac64-45d4-beba-191efcedea45@googlegroups.com> (permalink)
Subject	Re: IBM STRETCH repricing decision?
From	Quadibloc <jsavard@ecn.ab.ca>

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On Tuesday, January 12, 2016 at 7:50:57 PM UTC-7, hanc...@bbs.cpcn.com wrote:

> The parallel processing was fast, but not as fast as expected.

Of course, in hindsight, one wonders how they _expected_ performance gains from 
pipelining when the machine didn't even have general registers - it had a 
memory-accumulator architecture. (And out-of-order execution hadn't been 
invented yet.)

So how on Earth was the machine supposed to work on another instruction until 
it had finished executing the previous one?

However, I also remember reading a statement somewhere to the effect that later 
fixes to the machines in the field got the machines to achieve their expected 
performance, so the customers got their $13.5 million's worth for only $7.78 
million. I'd be interested in finding out just what changes were made to 
achieve that.

John Savard

Thread

IBM STRETCH repricing decision? hancock4@bbs.cpcn.com - 2016-01-12 09:37 -0800
  Re: IBM STRETCH repricing decision? Quadibloc <jsavard@ecn.ab.ca> - 2016-01-12 15:59 -0800
    Re: IBM STRETCH repricing decision? Quadibloc <jsavard@ecn.ab.ca> - 2016-01-12 16:01 -0800
    Re: IBM STRETCH repricing decision? hancock4@bbs.cpcn.com - 2016-01-12 18:50 -0800
      Re: IBM STRETCH repricing decision? Quadibloc <jsavard@ecn.ab.ca> - 2016-01-12 23:37 -0800
        Re: IBM STRETCH repricing decision? hancock4@bbs.cpcn.com - 2016-01-13 07:24 -0800
          Re: IBM STRETCH repricing decision? Quadibloc <jsavard@ecn.ab.ca> - 2016-01-13 14:37 -0800
      Re: IBM STRETCH repricing decision? Morten Reistad <first@last.name.invalid> - 2016-01-13 08:37 +0100
        Re: IBM STRETCH repricing decision? hancock4@bbs.cpcn.com - 2016-01-13 07:39 -0800
          Re: IBM STRETCH repricing decision? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-01-13 08:17 -0800
            Re: IBM STRETCH repricing decision? Jon Elson <elson@pico-systems.com> - 2016-01-13 18:02 -0600
          Re: IBM STRETCH repricing decision? Quadibloc <jsavard@ecn.ab.ca> - 2016-01-13 12:58 -0800
            Re: IBM STRETCH repricing decision? hancock4@bbs.cpcn.com - 2016-01-13 13:53 -0800
              Re: IBM STRETCH repricing decision? Quadibloc <jsavard@ecn.ab.ca> - 2016-01-13 14:31 -0800
                Re: IBM STRETCH repricing decision? hancock4@bbs.cpcn.com - 2016-01-13 18:38 -0800
              Re: IBM STRETCH repricing decision? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-01-13 22:43 +0000
                Re: IBM STRETCH repricing decision? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-01-13 20:13 -0500
                Re: IBM STRETCH repricing decision? Gene Wirchenko <genew@telus.net> - 2016-01-13 17:17 -0800
                Re: IBM STRETCH repricing decision? hancock4@bbs.cpcn.com - 2016-01-13 18:32 -0800
                Re: IBM STRETCH repricing decision? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-01-13 21:51 -0500
                Re: IBM STRETCH repricing decision? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2016-01-14 18:24 +0000
              Re: IBM STRETCH repricing decision? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-01-13 20:04 -0500
            Re: IBM STRETCH repricing decision? Peter Flass <peter_flass@yahoo.com> - 2016-01-14 08:03 -0500
          Re: IBM STRETCH repricing decision? Jon Elson <elson@pico-systems.com> - 2016-01-13 17:49 -0600
            Re: IBM STRETCH repricing decision? Peter Flass <peter_flass@yahoo.com> - 2016-01-14 08:03 -0500

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