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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Thomas Koenig <tkoenig@netcologne.de>
Newsgroups: comp.arch
Subject: Re: Short Vectors Versus Long Vectors
Date: Wed, 24 Apr 2024 05:47:54 -0000 (UTC)
Organization: A noiseless patient Spider
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John Savard <quadibloc@servername.invalid> schrieb:
> On Tue, 23 Apr 2024 02:14:32 +0000, mitchalsup@aol.com (MitchAlsup1)
> wrote:
>
>>CRAY machines stayed "in style" as long as memory latency remained smaller
>>than the length of a vector (64 cycles) and fell out of favor when the cores
>>got fast enough that memory could no longer keep up.
>>
>>I whish them well, but I expect it will not work out as they desire.....
>
> I know that you've said this about Cray-style vectors.
>
> I had thought the cause was much simpler. As soon as chiips like the
> 486 DX and then the Pentium II became available,

The 486 came out in 1989.

>a Cray-style machine
> would have had to be implemented from smaller-scale integrated
> circuits, so it would have been wildly uneconomic for the performance
> it provided;

The Cray C90 came out in 1991.  That was still considered ecomomic
by the people who bought it :-)

The (low-level) competition for scientific computing at the time
was workstations.