Newsgroups: comp.parallel.pvm
From: "D. Jain" <D.Jain@ncl.ac.uk>
Subject: Re: PVM buffering
Organization: University of Newcastle upon Tyne, UK
Date: 29 Jun 1995 11:33:29 GMT
Message-ID: <3su329$9pc@whitbeck.ncl.ac.uk>

In article <3srh5i$h0t@george.rutgers.edu>, katsaros@george.rutgers.edu (Georgios Katsaros) writes:
|> 
|> Hi,
|>  I'm using pvm to parallelize a ship hydrodynamics program on Cray T3D. 
|>  The program runs correctly for a number of iterations, and then hangs, 
|>  with the message "Operand out of range". A similar problem occurs when 
|>  using workstation clusters instead of the Cray.
|> 
|>  The number of iterations I get depends on the size of messages passed 
|>  using pvm calls - I only use a simple master-slave model. I suspect that
|>  there must be a problem with accumulating messages. Is there any way to
|>  control the message buffer sizes? Or perhaps to flush buffer space?
|> 
|>  If anyone has had any experience in a similar problem, I'd appreciate any 
|>  comment.
|> 
|>   thanks a lot,
|>  
|>   George Katsaros
|>   Rutgers University.

Try fiddling with PVM_SM_POOL environment variable on the Cray which sets the
number of entries of PVM_DATA_MAX length in the shared memory area. 
-- 
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== DEEPAK JAIN = IRC Nick: Toon = d.jain@newcastle.ac.uk ==
= WWW address:http://www.ncl.ac.uk/~n04ck = (0191)2227360 =
== Physics Department, Univ. of Newcastle upon Tyne, UK  ==
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