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Article #352Re: Glossary of Parallel Computing Terms
From: Thilo Kielmann
Date: Tue, 15 Sep 1992 15:19
Date: Tue, 15 Sep 1992 15:19
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1404 bytes
In article <1992Sep14.122934.16072@hubcap.clemson.edu>, Greg Wilson <gvw@epcc.edinburgh.ac.uk> writes:
>
> The second version of a glossary of parallel computing terms is now
> available by anonymous ftp from:
>
> ftp.epcc.ed.ac.uk:pub/personal/gvw/glossary.ps.Z.uu
>
First of all: Thank you very much for this piece of work!
Second: A question to your definition of the "parallel balance point".
You define the time T taken to perform some calculation of size N on P
processors as:
T = fx(N,P) - fc(N,P)
where the execution time function fx is a decreasing function of P,
while the coordination time function fc is an increasing function of P.
I worry about the subtraction of these 2 functions. Isn't it necessary
to perform both execution _and_ coordination? So, why not add fx and fc?
Is it just a typo, or am I wrong?
Thilo Kielmann (kielmann@isa.informatik.th-darmstadt.de)
Dept. of Computer Science (FB 20)
University of Darmstadt
Germany
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Path: arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!sun-barr!sh.wide!wnoc-tyo-news!etl.go.jp!gama!lab!nttlab!daemon From: kielmann@isa.informatik.th-darmstadt.de (Thilo Kielmann) Newsgroups: fj.mail-lists.parallel Subject: Re: Glossary of Parallel Computing Terms Message-ID: <315588@nttlab.ntt.JP> Date: 15 Sep 92 15:19:04 GMT Sender: daemon@nttlab.ntt.JP Distribution: fj Lines: 31 Approved: news@nttlab.ntt