Example usage for java.lang Runtime gc

List of usage examples for java.lang Runtime gc

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Introduction

In this page you can find the example usage for java.lang Runtime gc.

Prototype

public native void gc();

Source Link

Document

Runs the garbage collector in the Java Virtual Machine.

Usage

From source file:edu.umn.cs.spatialHadoop.visualization.MultilevelPlot.java

public static Job plot(Path[] inPaths, Path outPath, Class<? extends Plotter> plotterClass,
        OperationsParams params) throws IOException, InterruptedException, ClassNotFoundException {
    if (params.getBoolean("showmem", false)) {
        // Run a thread that keeps track of used memory
        Thread memThread = new Thread(new Thread() {
            @Override/*from   www. ja va  2s.c  om*/
            public void run() {
                Runtime runtime = Runtime.getRuntime();
                while (true) {
                    try {
                        Thread.sleep(60000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    runtime.gc();
                    LOG.info("Memory usage: "
                            + ((runtime.totalMemory() - runtime.freeMemory()) / (1024 * 1024 * 1024)) + "GB.");
                }
            }
        });
        memThread.setDaemon(true);
        memThread.start();
    }

    // Decide how to run it based on range of levels to generate
    String[] strLevels = params.get("levels", "7").split("\\.\\.");
    int minLevel, maxLevel;
    if (strLevels.length == 1) {
        minLevel = 0;
        maxLevel = Integer.parseInt(strLevels[0]) - 1;
    } else {
        minLevel = Integer.parseInt(strLevels[0]);
        maxLevel = Integer.parseInt(strLevels[1]);
    }
    // Create an output directory that will hold the output of the two jobs
    FileSystem outFS = outPath.getFileSystem(params);
    outFS.mkdirs(outPath);

    Job runningJob = null;
    if (OperationsParams.isLocal(params, inPaths)) {
        // Plot local
        plotLocal(inPaths, outPath, plotterClass, params);
    } else {
        int maxLevelWithFlatPartitioning = params.getInt(FlatPartitioningLevelThreshold, 4);
        if (minLevel <= maxLevelWithFlatPartitioning) {
            OperationsParams flatPartitioning = new OperationsParams(params);
            flatPartitioning.set("levels", minLevel + ".." + Math.min(maxLevelWithFlatPartitioning, maxLevel));
            flatPartitioning.set("partition", "flat");
            LOG.info("Using flat partitioning in levels " + flatPartitioning.get("levels"));
            runningJob = plotMapReduce(inPaths, new Path(outPath, "flat"), plotterClass, flatPartitioning);
        }
        if (maxLevel > maxLevelWithFlatPartitioning) {
            OperationsParams pyramidPartitioning = new OperationsParams(params);
            pyramidPartitioning.set("levels",
                    Math.max(minLevel, maxLevelWithFlatPartitioning + 1) + ".." + maxLevel);
            pyramidPartitioning.set("partition", "pyramid");
            LOG.info("Using pyramid partitioning in levels " + pyramidPartitioning.get("levels"));
            runningJob = plotMapReduce(inPaths, new Path(outPath, "pyramid"), plotterClass,
                    pyramidPartitioning);
        }
        // Write a new HTML file that displays both parts of the pyramid
        // Add an HTML file that visualizes the result using Google Maps
        LineReader templateFileReader = new LineReader(
                MultilevelPlot.class.getResourceAsStream("/zoom_view.html"));
        PrintStream htmlOut = new PrintStream(outFS.create(new Path(outPath, "index.html")));
        Text line = new Text();
        while (templateFileReader.readLine(line) > 0) {
            String lineStr = line.toString();
            lineStr = lineStr.replace("#{TILE_WIDTH}", Integer.toString(params.getInt("tilewidth", 256)));
            lineStr = lineStr.replace("#{TILE_HEIGHT}", Integer.toString(params.getInt("tileheight", 256)));
            lineStr = lineStr.replace("#{MAX_ZOOM}", Integer.toString(maxLevel));
            lineStr = lineStr.replace("#{MIN_ZOOM}", Integer.toString(minLevel));
            lineStr = lineStr.replace("#{TILE_URL}", "(zoom <= " + maxLevelWithFlatPartitioning
                    + "? 'flat' : 'pyramid')+('/tile-' + zoom + '-' + coord.x + '-' + coord.y + '.png')");

            htmlOut.println(lineStr);
        }
        templateFileReader.close();
        htmlOut.close();
    }

    return runningJob;
}

From source file:ffx.HeadlessMain.java

/**
 * Complete initializations./*from  w  w  w. jav a  2 s.  c o m*/
 *
 * @param commandLineFile a {@link java.io.File} object.
 * @param argList a {@link java.util.List} object.
 * @param logHandler a {@link ffx.ui.LogHandler} object.
 */
public HeadlessMain(File commandLineFile, List<String> argList, LogHandler logHandler) {
    // Start a timer.
    stopWatch.start();

    // Construct the MainPanel, set it's LogHandler, and initialize then it.
    mainPanel = new MainPanel();
    logHandler.setMainPanel(mainPanel);
    mainPanel.initialize();

    // Open the supplied script file.
    if (commandLineFile != null) {
        if (!commandLineFile.exists()) {
            /**
             * See if the commandLineFile is an embedded script.
             */
            String name = commandLineFile.getName();
            name = name.replace('.', '/');
            String pathName = "ffx/scripts/" + name;
            ClassLoader loader = getClass().getClassLoader();
            URL embeddedScript = loader.getResource(pathName + ".ffx");
            if (embeddedScript == null) {
                embeddedScript = loader.getResource(pathName + ".groovy");
            }
            if (embeddedScript != null) {
                try {
                    commandLineFile = new File(FFXClassLoader.copyInputStreamToTmpFile(
                            embeddedScript.openStream(), commandLineFile.getName(), ".ffx"));
                } catch (Exception e) {
                    logger.warning("Exception extracting embedded script " + embeddedScript.toString() + "\n"
                            + e.toString());
                }
            }
        }
        if (commandLineFile.exists()) {
            mainPanel.getModelingShell().setArgList(argList);
            mainPanel.open(commandLineFile, null);
        } else {
            logger.warning(format("%s was not found.", commandLineFile.toString()));
        }
    }

    /**
     * Print start-up information.
     */
    if (logger.isLoggable(Level.FINE)) {
        StringBuilder sb = new StringBuilder();
        sb.append(format("\n Start-up Time (msec): %s.", stopWatch.getTime()));
        Runtime runtime = Runtime.getRuntime();
        runtime.runFinalization();
        runtime.gc();
        long occupiedMemory = runtime.totalMemory() - runtime.freeMemory();
        long KB = 1024;
        sb.append(format("\n In-Use Memory   (Kb): %d", occupiedMemory / KB));
        sb.append(format("\n Free Memory     (Kb): %d", runtime.freeMemory() / KB));
        sb.append(format("\n Total Memory    (Kb): %d", runtime.totalMemory() / KB));
        logger.fine(sb.toString());
    }
}

From source file:org.apache.shindig.social.opensocial.util.JsonConverterPerformancePerf.java

public void testToJsonLibOnInheritedClassInput() throws Exception {
    SpecialPerson[] spa = new SpecialPerson[TEST_SIZE];
    SpecialPerson[] sparesult = new SpecialPerson[TEST_SIZE];
    Runtime r = Runtime.getRuntime();
    r.gc();
    long personStart = r.totalMemory() - r.freeMemory();
    for (int i = 0; i < TEST_SIZE; i++) {
        spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense");
    }/* w  w  w  . j a  v  a 2 s . c  o  m*/
    long personEnd = r.totalMemory() - r.freeMemory();

    String[] serializeOutput = new String[TEST_SIZE];
    r.gc();
    for (int i = 0; i < TEST_SIZE; i++) {

        serializeOutput[i] = beanJsonLibConverter.convertToString(spa[i]);
    }

    r.gc();
    long memstart = r.totalMemory() - r.freeMemory();
    long startInput = System.currentTimeMillis();
    for (int i = 0; i < TEST_SIZE; i++) {
        sparesult[i] = beanJsonLibConverter.convertToObject(serializeOutput[i], SpecialPerson.class);
    }
    long endInput = System.currentTimeMillis();
    long memend = r.totalMemory() - r.freeMemory();

    log.info("SF JSON Lib Input " + average(startInput, endInput, TEST_SIZE) + " ms/conversion, "
            + (average(memstart, memend, TEST_SIZE) - average(personStart, personEnd, TEST_SIZE))
            + " heap bytes/conversion, person object consumed on average "
            + average(personStart, personEnd, TEST_SIZE));
}

From source file:org.apache.shindig.social.opensocial.util.JsonConverterPerformancePerf.java

public void XtestToJsonOnInheritedClassInput() throws Exception {
    SpecialPerson[] spa = new SpecialPerson[TEST_SIZE];
    SpecialPerson[] sparesult = new SpecialPerson[TEST_SIZE];
    Runtime r = Runtime.getRuntime();
    r.gc();
    long personStart = r.totalMemory() - r.freeMemory();
    for (int i = 0; i < TEST_SIZE; i++) {
        spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense");
    }//from  w w w  .  jav  a  2  s  .c  om
    long personEnd = r.totalMemory() - r.freeMemory();

    String[] serializeOutput = new String[TEST_SIZE];
    r.gc();
    for (int i = 0; i < TEST_SIZE; i++) {

        serializeOutput[i] = beanJsonConverter.convertToString(spa[i]);
    }

    r.gc();
    long memstart = r.totalMemory() - r.freeMemory();
    long startInput = System.currentTimeMillis();

    for (int i = 0; i < TEST_SIZE; i++) {
        sparesult[i] = beanJsonConverter.convertToObject(serializeOutput[i], SpecialPerson.class);
    }
    long endInput = System.currentTimeMillis();
    long memend = r.totalMemory() - r.freeMemory();

    log.info("SF JSON Lib Input " + average(startInput, endInput, TEST_SIZE) + " ms/conversion, "
            + (average(memstart, memend, TEST_SIZE) - average(personStart, personEnd, TEST_SIZE))
            + " heap bytes/conversion, person object consumed on average "
            + average(personStart, personEnd, TEST_SIZE));
}

From source file:org.apache.shindig.social.opensocial.util.JsonConverterPerformancePerf.java

public void testToJsonLibOnInheritedClassOutput() throws Exception {
    SpecialPerson[] spa = new SpecialPerson[TEST_SIZE];
    for (int i = 0; i < TEST_SIZE; i++) {
        spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense");
    }/*  w w w.  j ava 2 s .c  om*/
    Runtime r = Runtime.getRuntime();
    r.gc();
    long memstart = r.totalMemory() - r.freeMemory();
    long startOutput = System.currentTimeMillis();
    String[] output = new String[TEST_SIZE];
    for (int i = 0; i < TEST_SIZE; i++) {
        output[i] = beanJsonLibConverter.convertToString(spa[i]);
    }
    long endOutput = System.currentTimeMillis();
    long memend = r.totalMemory() - r.freeMemory();

    String[] serializeOutput = new String[TEST_SIZE];
    char[] source = output[0].toCharArray();
    r.gc();

    long stringsizeStart = r.totalMemory() - r.freeMemory();
    for (int i = 0; i < TEST_SIZE; i++) {
        serializeOutput[i] = new String(source);
    }
    long stringsizeEnd = r.totalMemory() - r.freeMemory();

    /*
     * Output the time per conversion and the memory usage - the output per
     * conversion.
     *
     */

    log.info("SF JSON Lib Output " + average(startOutput, endOutput, TEST_SIZE) + " ms/conversion, "
            + (average(memstart, memend, TEST_SIZE) - average(stringsizeStart, stringsizeEnd, TEST_SIZE))
            + " heap bytes/conversion, output packet consumed on average "
            + average(stringsizeStart, stringsizeEnd, TEST_SIZE) + " for a string length of "
            + output[0].length());
    log.info("Output Was [" + output[0] + ']');
}

From source file:com.openddal.test.BaseTestCase.java

/**
 * Get the number of bytes heap memory in use.
 *
 * @return the used bytes//  ww w.  ja  v  a  2 s.  c om
 */
public static long getMemoryUsedBytes() {
    Runtime rt = Runtime.getRuntime();
    long memory = Long.MAX_VALUE;
    for (int i = 0; i < 8; i++) {
        rt.gc();
        long memNow = rt.totalMemory() - rt.freeMemory();
        if (memNow >= memory) {
            break;
        }
        memory = memNow;
    }
    return memory;
}

From source file:org.apache.shindig.social.opensocial.util.JsonConverterPerformancePerf.java

public void testToJsonOnInheritedClassOutput() throws Exception {
    SpecialPerson[] spa = new SpecialPerson[TEST_SIZE];
    for (int i = 0; i < TEST_SIZE; i++) {
        spa[i] = new SpecialPerson(String.valueOf(i), "robot", "nonsense");
    }/*from w  w  w.  java  2s. c  o  m*/
    Runtime r = Runtime.getRuntime();
    String[] output = new String[TEST_SIZE];
    r.gc();
    long memstart = r.totalMemory() - r.freeMemory();
    long startOutput = System.currentTimeMillis();
    for (int i = 0; i < TEST_SIZE; i++) {
        output[i] = ((JSONObject) beanJsonConverter.convertToJson(spa[i])).toString();
    }
    long endOutput = System.currentTimeMillis();
    long memend = r.totalMemory() - r.freeMemory();
    String[] serializeOutput = new String[TEST_SIZE];
    char[] source = output[0].toCharArray();
    r.gc();

    long stringsizeStart = r.totalMemory() - r.freeMemory();

    for (int i = 0; i < TEST_SIZE; i++) {
        serializeOutput[i] = new String(source);
    }
    long stringsizeEnd = r.totalMemory() - r.freeMemory();

    log.info("ORG JSON Lib Output " + average(startOutput, endOutput, TEST_SIZE) + " ms/conversion, "
            + (average(memstart, memend, TEST_SIZE) - average(stringsizeStart, stringsizeEnd, TEST_SIZE))
            + " heap bytes/conversion, output packet consumed on average "
            + average(stringsizeStart, stringsizeEnd, TEST_SIZE) + " for a string length of "
            + output[0].length());
    log.info("Output Was [" + output[0] + ']');
}

From source file:ffx.ui.UIDataConverter.java

/**
 * Rather verbose output for timed File Operations makes it easy to grep log
 * files for specific information.//from  w w  w .jav a  2 s  .  c  o m
 */
private void startTimer() {
    Runtime runtime = Runtime.getRuntime();
    if (gc) {
        runtime.runFinalization();
        runtime.gc();
    }
    occupiedMemory = runtime.totalMemory() - runtime.freeMemory();
    time -= System.nanoTime();
}

From source file:ffx.ui.UIDataConverter.java

private void stopTimer(FFXSystem ffxSystem) {
    time += System.nanoTime();//from  w  w w  .ja  va 2  s.c o  m
    logger.log(Level.INFO, " Opened {0} with {1} atoms.\n File Op Time  (msec): {2}",
            new Object[] { ffxSystem.toString(), ffxSystem.getAtomList().size(), time * 1.0e-9 });
    Runtime runtime = Runtime.getRuntime();
    if (gc) {
        runtime.runFinalization();
        runtime.gc();
        long moleculeMemory = (runtime.totalMemory() - runtime.freeMemory()) - occupiedMemory;
        logger.log(Level.INFO, " System Memory  (Kb): {0}", moleculeMemory / KB);
    }
    occupiedMemory = runtime.totalMemory() - runtime.freeMemory();
    if (gc) {
        logger.log(Level.INFO, " Memory In Use  (Kb): {0}", occupiedMemory / KB);
    }
}

From source file:com.flat20.fingerplay.FingerPlayActivity.java

@Override
public void onCreate(Bundle savedInstanceState) {

    // Init needs to be done first!
    mSettingsModel = SettingsModel.getInstance();
    mSettingsModel.init(this);

    mMidiControllerManager = MidiControllerManager.getInstance();

    super.onCreate(savedInstanceState);

    Runtime r = Runtime.getRuntime();
    r.gc();

    Toast info = Toast.makeText(this, "Go to http://goddchen.github.io/Fingerplay-Midi/ for help.",
            Toast.LENGTH_LONG);/*  w  ww  .  j  a  v a2 s  . co m*/
    info.show();

    // Sensor code
    sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
    sensors = new ArrayList<Sensor>(sensorManager.getSensorList(Sensor.TYPE_ALL));
    startSensors();

    // Simple splash animation

    Splash navSplash = new Splash(mNavigationOverlay, 64, 30, mWidth, mNavigationOverlay.x);
    mNavigationOverlay.x = mWidth;
    AnimationManager.getInstance().add(navSplash);

    Splash mwcSplash = new Splash(mMidiWidgetsContainer, 64, 40, -mWidth, mMidiWidgetsContainer.x);
    mMidiWidgetsContainer.x = -mWidth;
    AnimationManager.getInstance().add(mwcSplash);

    if (BuildConfig.DEBUG) {
        if (TextUtils.isEmpty(PreferenceManager.getDefaultSharedPreferences(this)
                .getString("settings_server_address", null))) {
            Toast.makeText(this, R.string.toast_server_not_setup, Toast.LENGTH_SHORT).show();
            startActivity(new Intent(getApplicationContext(), SettingsView.class));
        }
    } else {
        boolean result = bindService(new Intent("com.android.vending.billing.InAppBillingService.BIND"),
                mBillingServiceConnection, Context.BIND_AUTO_CREATE);
        if (!result) {
            unableToVerifyLicense(getString(R.string.billing_error_init), false);
        }
    }
}