Did you set up ECJ to use the number of cores you expect?

Specifically what did you do to set this up? Which configuration setting and precisely what did you give it?

On Wed, Jun 19, 2013 at 2:13 AM, Bojan Janisch <[log in to unmask]> wrote:
Hello everyone,

I'm using ECJ for rule-creation and -evaluation. Recently I can use ECJ on 20 cores
of a server which runs very fast at the beginning. But after a while the CPU-usage
goes down to 1 core which I don't understand.

The evaluation process looks so:

Step 1: Create a valid rule from GPTree
Step 2: If rule contains nothing useful skip everything else, set bad score and go to Step 6
Step 3: Rule contains something useful, so load the testdata
Step 4: Run the rule through Drools and testdata (Drools is a ruleengine which also runs multithreaded)
Step 5: Compare the output of Drools and a goldstandard (the goldstandard and some more information are one time loaded at setup)
Step 6: Put the score, returned by the comparison, into the koza fitness

I don't know why but after some time, ECJ is only using 1 core.
Does someone got an idea where the problem could come from?