RunParallelisationExample.java

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/* *********************************************************************** *
 * project: org.matsim.*
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 * copyright       : (C) 2014 by the members listed in the COPYING,     *
 *                   LICENSE and WARRANTY file.                            *
 * email           : info at matsim dot org                                *
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *   See also COPYING, LICENSE and WARRANTY file                           *
 *                                                                         *
 * *********************************************************************** */

/* *********************************************************************** *
 * project: org.matsim.*
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 * copyright       : (C) 2014 by the members listed in the COPYING,     *
 *                   LICENSE and WARRANTY file.                            *
 * email           : info at matsim dot org                                *
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *   See also COPYING, LICENSE and WARRANTY file                           *
 *                                                                         *
 * *********************************************************************** */

package tutorial.programming.example17Parallelisation;

import java.io.File;

import org.apache.log4j.Logger;
import org.matsim.api.core.v01.Scenario;
import org.matsim.core.config.Config;
import org.matsim.core.config.ConfigUtils;
import org.matsim.core.controler.Controler;
import org.matsim.core.gbl.Gbl;
import org.matsim.core.scenario.ScenarioUtils;
import org.matsim.core.utils.io.IOUtils;

public class RunParallelisationExample {
    final private static Logger LOG = Logger.getLogger(Math.class);

    public static void main(String[] args) {
        /* Running in single thread. */
        Gbl.startMeasurement();
        Config config = ConfigUtils.createConfig();
        String configFilename = "examples/siouxfalls-2014/config_default.xml";
        ConfigUtils.loadConfig(config, configFilename);
        config.controler().setLastIteration(10);
        /*====================================================================*/
        /* Setting parallelisation: */
        config.qsim().setNumberOfThreads(1);                    /* Mobility simulation */
        config.global().setNumberOfThreads(1);                  /* Replanning */
        config.parallelEventHandling().setNumberOfThreads(1);   /* Events handling. */
        /*====================================================================*/
        Scenario sc = ScenarioUtils.loadScenario(config);
        Controler controler = new Controler(sc);
        controler.run();
        LOG.info("Single thread time:");
        Gbl.printElapsedTime();
        
        /* Running multi-threaded. First delete the output directory. */
        IOUtils.deleteDirectory(new File(config.controler().getOutputDirectory()));
        Gbl.startMeasurement();
        config = ConfigUtils.createConfig();
        ConfigUtils.loadConfig(config, configFilename);
        config.controler().setLastIteration(10);
        /*====================================================================*/
        /* Setting parallelisation: */
        config.qsim().setNumberOfThreads(2);                    /* Mobility simulation */
        config.global().setNumberOfThreads(2);                  /* Replanning */
        config.parallelEventHandling().setNumberOfThreads(2);   /* Events handling. */
        /*====================================================================*/
        sc = ScenarioUtils.loadScenario(config);
        controler = new Controler(sc);
        controler.run();
        LOG.info("Multi-threaded time:");
        Gbl.printElapsedTime();
    }

}