26 Apr
1998
26 Apr
'98
5:17 p.m.
At 11:01 AM 25-04-98 -0400, William Donzelli wrote:
I think Seymour Cray was a bit to blame as well, as his
machines were also
very fast, but lacking in some areas. The Cray-1s have quite a limitted
memory, and no virtual memory behind it, making problems with very large
sets of data difficult.
I understood that the lack of virtual memory was a conscious design
decision. If you want the best available memory throughput, the last thing
you need to do is add an additional layer of memory translation and even
worse, page faults. If you want to process large datasets either buy more
memory or decompose your problem (neither of which are easy or cheap...)
Huw Davies | e-mail: Huw.Davies(a)latrobe.edu.au
Information Technology Services | Phone: +61 3 9479 1550 Fax: +61 3 9479
1999
La Trobe University | "My Alfa keeps me poor in a monetary
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