May 2011


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"P. Chewning Toulmin" <[log in to unmask]>
Reply To:
MASON Multiagent Simulation Toolkit <[log in to unmask]>
Wed, 18 May 2011 22:43:44 -0400
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Hello everyone,

   Nutshell of my request: I'm looking for examples or experience with anyone
running MASON instances in multiple threads in ECJ and getting the results out
of the MASON instance for fitness purposes

   Background/request: I'm working on a project where I'm doing some
evolution with ECJ (version 20) using MASON (version 15) to run simulations.
However the model I'm trying to run on MASON take a very long time, so I
thought I'd try to speed up by running MASON in multiple threads. I
understand that ECJ can do evaluations in multiple threads, and in theory I can
just run MASON in these multiple threads. Normally one can get the results
from MASON via a static method/variable in SimState class. However since I
want to run multiple MASON instances in multiple threads, I can't really use a
static variable/method, so I'd need to use class variable in the MASON
instance. However because of the way MASON instances are instantiated and
run (within the doLoop() method in the SimState class, there is no obvious or
easy access to the instance itself. I can probably work around by copying
most of the code in the doLoop() into my code so I'd have access to the
MASON instance. But before I do that, I just wanted to check to see if anyone
here has worked with ECJ and MASON where ECJ run multiple MASON
instances in multiple threads and able to get results from all these

   Thanks everyone!