Re: Is 64 bits enough address space?

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Article #12614

#12614

From: Anssi Karhinen
Date: Fri, 06 Oct 1995 13:08

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In article <44u6al$ml8@m1.cs.man.ac.uk>
watson@cs.man.ac.uk <watson@cs.man.ac.uk> wrote:
> 
> I don't know whether anyone has done this sum and I have missed it. If you
> assume indexing through memory at 1 nsec intervals, 32 bits of address space
> takes just over 4 seconds. 64 bits of space takes over 500 years!
> 
> I have a feeling that for most of us, it could be a bit of a waste of money!
> 
> I know OS people do like a bit of flexibiltiy, but I have a feeling that 64
> bits is going to be enough for quite a long time.
> 

Yeah. But what if there is 2**20 CPUs indexing this this 64 bit space at 0.1
nsec intervals? Could happen in our lifetime, You know.

If memory spaces become persistent then 64b or more is not only practical but
necessary even today. Objects just tend to keep multiplying...like rabbits

(the answer is 0.5 h)

--Anssi

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Path: arc1-ca.pugleaf.net!research.nokia.fi!usenet
From: anssi.karhinen@nokia.fi (Anssi Karhinen)
Newsgroups: comp.arch,comp.lang.c
Subject: Re: Is 64 bits enough address space?
Date: Fri, 6 Oct 1995 09:08:12 -400
Organization: Nokia Research Center
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Message-ID: <452kms$glu@pepper.research.nokia.fi>
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