Newsgroups: comp.parallel.pvm
From: fhjl1@ivdda2 (Juergen Lepper)
Reply-To: lepper@ivd.uni-stuttgart.de
Subject: PVM Reduce on the Paragon?
Organization: IVD, University of Stuttgart, Germany
Date: 12 Sep 1995 10:33:15 GMT
Message-ID: <433nlb$25vg@info4.rus.uni-stuttgart.de>

Hi,

I noticed that a call to PVMFREDUCE is awfully slow on a Paragon using
PVM Version 3.3.8.
Does anybody know whether this call uses "PvmDataDefault" as default and
therefore packs the data ?

I have no other explanation for this behaviour, because a simple "all send
their values to one who numerically performs the global operation and sends
the result back to all other" with PVMFPSEND is noticeable faster.

Any comments on this?

With best regards

Juergen


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Juergen Lepper             
University of Stuttgart                                          I  V   V  DDD 
Institute for Process Engineering and Power Plant Technology     I  V   V  D  D
Pfaffenwaldring 23                                               I   V V   D  D
D-70550 Stuttgart                                                I    V    DDD
Germany

phone  :  +49 711 685-3761
fax    :  +49 711 685-3491
Email  :  lepper@ivd.uni-stuttgart.de
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