Hi Uday, I've specified the cores if you look at my previous answer to Warren. Are there some more places where to define multi-threading for ECJ? I don't find any other information than setting the cores with breedthreads and evalthreads. Greetings Bojan ----- Ursprüngliche Mail ----- Von: "Uday kamath" <[log in to unmask]> An: [log in to unmask] Gesendet: Mittwoch, 19. Juni 2013 13:30:39 Betreff: Re: ECJ is not using all cores Bojan ECJ can be multi threaded, look at the manual, various elements of breeding, evaluating, etc can be multithreaded and you can specify threads=cores to get full parallelism. I am running ECJ on 12 core and using all of them, so shouldn't be an issue. Uday On Wed, Jun 19, 2013 at 5:13 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? > > Greetings > > Bojan