Re: The Seymour Cray Era of Supercomputers

From	Michael S <already5chosen@yahoo.com>
Newsgroups	comp.arch
Subject	Re: The Seymour Cray Era of Supercomputers
Date	2025-05-21 11:21 +0300
Organization	A noiseless patient Spider
Message-ID	<20250521112125.000030e3@yahoo.com> (permalink)
References	<100apst$hsll$1@dont-email.me> <20250519165549.000026d1@yahoo.com> <100ggin$1sbnn$2@dont-email.me> <20250520134518.0000531e@yahoo.com> <100imvk$26fg$1@gal.iecc.com>

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On Tue, 20 May 2025 19:59:48 -0000 (UTC)
John Levine <johnl@taugh.com> wrote:

> According to Michael S  <already5chosen@yahoo.com>:
> >At time of introduction CDC 6600 was undoubtedly much faster both
> >than older [more expensive] IBM 7030 and than contemporary
> >[significantly less expensive] S/360 Model 50. But it was not
> >"orders of magnitude faster". Not even one order of magnitude
> >faster, except, may be, vs Model 50 in artificial very memory-light
> >floating-point intensive scenarios. 
> >High end S/360 (Model 65) came about half a year later. I would
> >imagine that for non-floating-point code it had about the same speed
> >as 6600.  
> 
> Those 360 models seem wrong.  The 360/50 was a midrange machine that
> shipped in August 1965, the /65 was a large machine that shipped
> in November 1964, 

Do you mean, November 1965?

> and the 360/75 was a high end machine that
> shipped in January 1966.  They were all announced at the same
> time, give or take IBM's replacing the paper 60 and 70 with the 
> faster 65 and 75.
> 

Sorry, I did not read Wikipedia articles about /50 and /65 with
sufficient attention and confused announcement with shipment. Didn't
realize that for /50 the time between announcement and shipment was
much longer than for /65.
W.r.t. CDC 6600 Wikipedia article does not state an exact date of the
1st shipment at all, just saying that it was in 1965.


> STRETCH was about 1.2 MIPS, the /50 was 0.133 scientific, 0.169
> commercial, the /65 was .563 and .567, and the /75 was .940 and .670,
> so only the /75 was a plausible replacement.  The high end machine
> was the /91 which shipped late and over budget in Oct 1967 and was
> much faster, 1.9 MIPS scientific and 1.8 MIPS commercial.  (I think
> the 91's actual commercial performance was much lower since it
> simulated decimal arithmetic in software, but nobody ran RPG programs
> on a /91.)
> 
> For concrete numbers a double precision floating point memory
> to register add on the /50 took 9.7us, /65 took 2.5us, /75 took .92us
> 
> Floating multiply was 47us, 7.7us, 4.1us.
> 
> The numbers for the /91 depended on whether the operands were
> available but if they were adds were 120ns, multiply 180ns.
> 
> The 6600 was reported to be three times faster than STRETCH which
> would have been 3.6 MIPS, a lot faster than any 360 of the time
> and well over an order of magnitude faster than the not particularly
> fast 360/50.
> 
> 
>

Thread

The Seymour Cray Era of Supercomputers Thomas Koenig <tkoenig@netcologne.de> - 2025-05-17 20:00 +0000
  Re: The Seymour Cray Era of Supercomputers mitchalsup@aol.com (MitchAlsup1) - 2025-05-17 21:27 +0000
    Re: The Seymour Cray Era of Supercomputers Thomas Koenig <tkoenig@netcologne.de> - 2025-05-18 05:46 +0000
      Re: The Seymour Cray Era of Supercomputers Michael S <already5chosen@yahoo.com> - 2025-05-18 18:23 +0300
        Re: The Seymour Cray Era of Supercomputers mitchalsup@aol.com (MitchAlsup1) - 2025-05-18 22:02 +0000
        Re: The Seymour Cray Era of Supercomputers quadibloc <quadibloc@gmail.com> - 2025-05-19 01:08 +0000
          Re: The Seymour Cray Era of Supercomputers Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-19 01:56 +0000
            Re: The Seymour Cray Era of Supercomputers quadibloc <quadibloc@gmail.com> - 2025-05-19 03:12 +0000
              OoO execution (was: The Seymour Cray Era of Supercomputers) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-05-19 06:22 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) John Levine <johnl@taugh.com> - 2025-05-19 17:10 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-05-19 17:46 +0000
                Re: OoO execution ze@zerandconsulting.com (Ze) - 2025-05-19 19:09 +0000
                Re: OoO execution Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-20 00:04 +0000
                Re: OoO execution mitchalsup@aol.com (MitchAlsup1) - 2025-05-20 00:30 +0000
                Re: OoO execution scott@slp53.sl.home (Scott Lurndal) - 2025-05-20 13:52 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) George Neuner <gneuner2@comcast.net> - 2025-05-21 12:52 -0400
                Re: OoO execution Stefan Monnier <monnier@iro.umontreal.ca> - 2025-05-21 13:14 -0400
                Re: OoO execution moi <findlaybill@blueyonder.co.uk> - 2025-05-21 18:47 +0100
                Re: OoO execution EricP <ThatWouldBeTelling@thevillage.com> - 2025-05-19 14:33 -0400
                Re: OoO execution quadibloc <quadibloc@gmail.com> - 2025-05-19 19:08 +0000
                Re: OoO execution Terje Mathisen <terje.mathisen@tmsw.no> - 2025-05-19 22:04 +0200
                Re: OoO execution Michael S <already5chosen@yahoo.com> - 2025-05-19 23:27 +0300
                Re: OoO execution John Savard <quadibloc@invalid.invalid> - 2025-07-16 14:27 +0000
                Re: OoO execution mitchalsup@aol.com (MitchAlsup1) - 2025-07-16 18:27 +0000
                Re: OoO execution Stefan Monnier <monnier@iro.umontreal.ca> - 2025-07-16 17:45 -0400
                Re: OoO execution Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-26 02:45 +0000
                Re: OoO execution John Savard <quadibloc@invalid.invalid> - 2025-07-31 20:38 +0000
                Re: OoO execution Michael S <already5chosen@yahoo.com> - 2025-08-01 15:02 +0300
                Re: OoO execution John Levine <johnl@taugh.com> - 2025-08-01 15:44 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) Michael S <already5chosen@yahoo.com> - 2025-05-19 23:41 +0300
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-20 00:01 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-05-20 21:21 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) Michael S <already5chosen@yahoo.com> - 2025-05-30 13:28 +0300
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) Al Kossow <aek@bitsavers.org> - 2025-05-30 10:51 -0700
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) scott@slp53.sl.home (Scott Lurndal) - 2025-05-30 19:36 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-05-31 07:57 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-30 22:05 +0000
                Re: OoO execution mitchalsup@aol.com (MitchAlsup1) - 2025-05-30 23:01 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2025-05-31 08:10 +0000
                Re: OoO execution (was: The Seymour Cray Era of Supercomputers) Thomas Koenig <tkoenig@netcologne.de> - 2025-05-29 19:02 +0000
                Re: OoO execution mitchalsup@aol.com (MitchAlsup1) - 2025-05-29 20:06 +0000
                Re: OoO execution Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-29 22:20 +0000
                Re: OoO execution David Schultz <david.schultz@earthlink.net> - 2025-05-29 18:36 -0500
              Re: The Seymour Cray Era of Supercomputers Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-19 07:50 +0000
            Re: The Seymour Cray Era of Supercomputers Michael S <already5chosen@yahoo.com> - 2025-05-19 16:55 +0300
              Re: The Seymour Cray Era of Supercomputers Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-19 23:58 +0000
                Re: The Seymour Cray Era of Supercomputers Michael S <already5chosen@yahoo.com> - 2025-05-20 13:45 +0300
                Re: The Seymour Cray Era of Supercomputers mitchalsup@aol.com (MitchAlsup1) - 2025-05-20 16:59 +0000
                Re: The Seymour Cray Era of Supercomputers John Levine <johnl@taugh.com> - 2025-05-20 19:59 +0000
                Re: The Seymour Cray Era of Supercomputers mitchalsup@aol.com (MitchAlsup1) - 2025-05-20 22:48 +0000
                Re: The Seymour Cray Era of Supercomputers Michael S <already5chosen@yahoo.com> - 2025-05-21 11:21 +0300
                Re: The Seymour Cray Era of Supercomputers Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-21 08:44 +0000
                Re: The Seymour Cray Era of Supercomputers John Levine <johnl@taugh.com> - 2025-05-21 16:09 +0000
                Re: The Seymour Cray Era of Supercomputers Michael S <already5chosen@yahoo.com> - 2025-05-21 20:11 +0300
                Re: The Seymour Cray Era of Supercomputers John Levine <johnl@taugh.com> - 2025-05-21 20:04 +0000
                Re: The Seymour Cray Era of Supercomputers Lars Poulsen <lars@cleo.beagle-ears.com> - 2025-05-25 21:08 +0000
                Re: 360/44, The Seymour Cray Era of Supercomputers John Levine <johnl@taugh.com> - 2025-05-25 22:50 +0000
    Re: The Seymour Cray Era of Supercomputers Michael S <already5chosen@yahoo.com> - 2025-05-18 11:33 +0300
      Re: The Seymour Cray Era of Supercomputers mitchalsup@aol.com (MitchAlsup1) - 2025-05-18 22:01 +0000
        Re: The Seymour Cray Era of Supercomputers Michael S <already5chosen@yahoo.com> - 2025-05-19 16:35 +0300
          Re: The Seymour Cray Era of Supercomputers Al Kossow <aek@bitsavers.org> - 2025-05-19 09:49 -0700
          Re: The Seymour Cray Era of Supercomputers mitchalsup@aol.com (MitchAlsup1) - 2025-05-19 18:14 +0000
            Re: The Seymour Cray Era of Supercomputers Michael S <already5chosen@yahoo.com> - 2025-05-19 23:11 +0300
              Re: The Seymour Cray Era of Supercomputers BGB <cr88192@gmail.com> - 2025-05-20 01:36 -0500
            Re: The Seymour Cray Era of Supercomputers Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-20 05:40 +0000
              Re: The Seymour Cray Era of Supercomputers mitchalsup@aol.com (MitchAlsup1) - 2025-05-20 16:58 +0000
                Re: The Seymour Cray Era of Supercomputers Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-05-21 00:28 +0000
            Re: The Seymour Cray Era of Supercomputers "Brian G. Lucas" <bagel99@gmail.com> - 2025-05-26 11:48 -0500
              Re: The Seymour Cray Era of Supercomputers mitchalsup@aol.com (MitchAlsup1) - 2025-05-26 18:01 +0000
                Re: The Seymour Cray Era of Supercomputers EricP <ThatWouldBeTelling@thevillage.com> - 2025-05-26 16:52 -0400
                Re: The Seymour Cray Era of Supercomputers Al Kossow <aek@bitsavers.org> - 2025-05-26 19:27 -0700

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