Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!uunet!mcsun!ukc!edcastle!rory
From: rory@castle.ed.ac.uk (R McKinnel)
Newsgroups: comp.sys.transputer
Subject: cs-tools communication and heap problem
Keywords: Meiko cs-tools heapspace
Message-ID: <9182@castle.ed.ac.uk>
Date: 14 Mar 91 19:34:17 GMT
Organization: Ecosse Group. Chem Eng Dept. Edinburgh University
Lines: 30

Hi,

    I have for some time now been using a 12 node Meiko Computing
Surface for the dynamic simulation of distillation columns. Up until now
most of the runs which I have been doing have been reasonably short and
the total number of communications sent has been around 10 000.

In the last few days I have been trying some longer runs and have found
that when I have sent about 80 000 messages, cs-tools reports that there
is no heap left for communication.

All my simulation code is in fortran, and I perform no mallocing of
space from my code. So I assume that cs-tools is grabbing memory and
never freeing it, although only in very small amounts given the number
of communications.

If anyone could shed some light on wether this is a bug, or wether it is
normal, or wether I have done something really stupid, I would love to
hear from you.

		Rory

*************************************************************************
Rory Mckinnel
Department of Chemical Engineering
Kings Buildings
Edinburgh 
Email rory@uk.ac.ed  rory@uk.ac.ed.chemeng
Telephone (031) 650 4866
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