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Re: The Seymour Cray Era of Supercomputers

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On Sun, 18 May 2025 22:01:19 +0000
mitchalsup@aol.com (MitchAlsup1) wrote:

> On Sun, 18 May 2025 8:33:30 +0000, Michael S wrote:
> 
> > On Sat, 17 May 2025 21:27:04 +0000
> > mitchalsup@aol.com (MitchAlsup1) wrote:
> >  
> >> Did the book relate the story of why CRAY-1 presented a DC-load to
> >> the power supply:: that is, the ECL gates were all of the form
> >> where they would switch 20 ma into either the true or the
> >> complement out- put and thus have no AC energy at the power supply
> >> level ??
> >>
> >> During the CDC 7600 reign, when performing vector calculations,
> >> (even though CDC 7600 was not a vector machine, it could stream
> >> calculations through its execution window at impressive rates);
> >> Certain data bit-patterns in CDC 7600 would cause more Gnd bounce
> >> and Vdd drop than the gates cols accommodate and the machine would
> >> take a data-dependent hard crash.
> >>  
> >
> > Which voltage, current and frequency are we talking about?  
> 
> Vdd and Gnd which fed the integrated logic gates.
> 

My question was about absolute numbers. Volts, amperes, nanoseconds.

> >  
> >> So, Cray got rid of the problem by presenting a DC-load to the
> >> power supply.  

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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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