Newsgroups: comp.parallel.pvm
From: fazilah@scs.leeds.ac.uk (F Haron)
Subject: program hangs when running on many host.
Organization: The University of Leeds, School of Computer Studies
Date: Wed, 26 Oct 1994 13:17:28 +0000 (GMT)
Message-ID: <1994Oct26.131729.22390@leeds.ac.uk>

Hi,

I'm running a master/slave program that does an addition of real numbers.  The
program works inconsistently, ie

	i) homogeneous platform - I have no problem running on a network of
	 2 to 16 SGI's w'stations (haven't tested more than 16)

	ii) shared memory multiprocessors - I *sometimes* have a problem 
	running it on the SGIMP (with 8 processors).  It hangs even with 4 
	slaves.  There are times when it gets through smoothly with 8 or even 
	9 slaves.

	iii) heterogeneous platform (SGI+SGIMP) - It works only for up to 4
	hosts (1 SGIMP & 4 SGIs) and hangs with more host.

Can some one tells me what causes this problem and how to overcome it?

Thanks.


Fazilah.


