Example usage for java.lang Runtime availableProcessors

Introduction

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

Prototype

public native int availableProcessors();

Source Link

Document

Returns the number of processors available to the Java virtual machine.

Usage

From source file:Main.java

public static void main(String[] args) {

    // check the number of processors available
    Runtime runTime = Runtime.getRuntime();
    System.out.println(runTime.availableProcessors());
}

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From source file:Main.java

public static void main(String[] args) {
    Runtime runtime = Runtime.getRuntime();

    int nrOfProcessors = runtime.availableProcessors();

    System.out.println("Number of processors available to the Java Virtual Machine: " + nrOfProcessors);
}

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From source file:org.lenskit.cli.Main.java

public static void main(String[] args) {
    ArgumentParser parser = ArgumentParsers.newArgumentParser("lenskit")
            .description("Work with LensKit recommenders and data.");
    Logging.addLoggingGroup(parser);/*from  ww w  .jav a2s  .c om*/

    Subparsers subparsers = parser.addSubparsers().metavar("COMMAND").title("commands");
    ServiceLoader<Command> loader = ServiceLoader.load(Command.class);
    for (Command cmd : loader) {
        Subparser cp = subparsers.addParser(cmd.getName()).help(cmd.getHelp()).setDefault("command", cmd);
        cmd.configureArguments(cp);
    }

    try {
        Namespace options = parser.parseArgs(args);
        Logging.configureLogging(options);
        Runtime rt = Runtime.getRuntime();
        logger.info("Starting LensKit {} on Java {} from {}", LenskitInfo.lenskitVersion(),
                SystemUtils.JAVA_VERSION, SystemUtils.JAVA_VENDOR);
        logger.debug("Built from Git revision {}", LenskitInfo.getHeadRevision());
        logger.debug("Using VM '{}' version {} from {}", SystemUtils.JAVA_VM_NAME, SystemUtils.JAVA_VM_VERSION,
                SystemUtils.JAVA_VM_VENDOR);
        logger.info("Have {} processors and heap limit of {} MiB", rt.availableProcessors(),
                rt.maxMemory() >> 20);
        Command cmd = options.get("command");
        cmd.execute(options);
        logger.info("If you use LensKit in published research, please see http://lenskit.org/research/");
    } catch (ArgumentParserException e) {
        parser.handleError(e);
        System.exit(1);
    } catch (Exception e) {
        logger.error("error running command: " + e, e);
        System.exit(2);
    }
}

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From source file:de.langmi.spring.batch.examples.complex.crosscutting.autothreadconf.AsyncTaskExecutorFactory.java

public static SimpleAsyncTaskExecutor createInstance() {
    SimpleAsyncTaskExecutor instance = new SimpleAsyncTaskExecutor();

    // set concurrencyLimit according to available processors
    Runtime runtime = Runtime.getRuntime();
    int nrCpu = runtime.availableProcessors();
    instance.setConcurrencyLimit(nrCpu);

    LOG.info("TaskExecutor ConcurrencyLimit:" + String.valueOf(nrCpu));

    return instance;
}

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From source file:edu.stanford.mobisocial.dungbeetle.ui.adapter.ObjectListCursorAdapter.java

private static int getBestBatchSize() {
    Runtime runtime = Runtime.getRuntime();
    if (runtime.availableProcessors() > 1)
        return 100;

    try {/*  ww  w. j  a  v a  2s .c  om*/
        File max_cpu_freq = new File("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq");
        byte[] freq_bytes = IOUtils.toByteArray(new FileInputStream(max_cpu_freq));
        String freq_string = new String(freq_bytes);
        double freq = Double.valueOf(freq_string);
        if (freq > 950000) {
            return 50;
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return 15;
}

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From source file:org.eclipse.wb.internal.core.editor.errors.report2.EnvironmentFileReportInfo.java

private static String createContents(IProject project) {
    String c = "";
    c += "Product Name: " + BrandingUtils.getBranding().getProductName() + CR;
    c += "Product Version: " + ProductInfo.getProduct().getVersion() + "[" + ProductInfo.getProduct().getBuild()
            + "]" + CR;
    c += "Installation Path: " + getInstallationPath() + CR;
    c += "Eclipse Version: " + PlatformInfo.getEclipseVersion().toString() + CR;
    c += "Eclipse Build Name: " + PlatformInfo.getEclipseBuildName() + CR;
    c += "Eclipse Build ID: " + PlatformInfo.getEclipseBuildId() + CR;
    c += "IDE Name: " + PlatformInfo.getIDEName() + CR;
    c += "IDE Version: " + PlatformInfo.getIDEVersionString() + CR;
    c += "IDE NL: " + PlatformInfo.getIDENL() + CR;
    c += "Eclipse Commands: " + StringUtils.replaceChars(getSystemProperty("eclipse.commands"), "\n\r", " ")
            + CR;/*from  w ww .  java 2s  . co m*/
    c += "Eclipse VM: " + getSystemProperty("eclipse.vm") + CR;
    c += "Eclipse VM Args: " + getSystemProperty("eclipse.vmargs") + CR;
    c += "OS Name: " + getSystemProperty("os.name") + CR;
    c += "OS Arch: " + getSystemProperty("os.arch") + CR;
    c += "OS Version: " + getSystemProperty("os.version") + CR;
    String linuxDescription = getLinuxDescription();
    if (!StringUtils.isEmpty(linuxDescription)) {
        c += "Linux Description: " + linuxDescription + CR;
    }
    String m_mozillaResult = tryCreateMozilla();
    if (!StringUtils.isEmpty(m_mozillaResult)) {
        c += "Browser Creation Result: " + m_mozillaResult + CR;
    }
    Runtime runtime = Runtime.getRuntime();
    c += "Available Processors: " + runtime.availableProcessors() + CR;
    c += "Memory Max: " + runtime.maxMemory() + CR;
    c += "Memory Total: " + runtime.totalMemory() + CR;
    c += "Memory Free: " + runtime.freeMemory() + CR;
    c += "Java Vendor: " + getSystemProperty("java.vendor") + CR;
    c += "Java Version: " + getSystemProperty("java.version") + CR;
    c += "Java Library Path: " + CR + getSystemProperty("java.library.path") + CR;
    c += "Project Class Path: " + CR + getClassPath(project) + CR;
    return c;
}

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From source file:com.jaspersoft.studio.community.utils.CommunityAPIUtils.java

/**
 * @return software and hardware info./*from   w ww.  java 2  s . c om*/
 */
public static String getHardwareSoftwareInfo() {
    BrandingInfo currBranding = JaspersoftStudioPlugin.getInstance().getBrandingInformation();
    String c = ""; //$NON-NLS-1$
    c += "Product Name: " + currBranding.getProductName() + CR; //$NON-NLS-1$
    c += "Product Version: " + currBranding.getProductVersion() + CR; //$NON-NLS-1$
    c += "Installation Path: " + getInstallationPath(currBranding.getProductMainBundleID()) + CR; //$NON-NLS-1$
    c += "Eclipse Version: " + PlatformInfo.getEclipseVersion().toString() //$NON-NLS-1$
            + CR;
    c += "Eclipse Build Name: " + PlatformInfo.getEclipseBuildName() + CR; //$NON-NLS-1$
    c += "Eclipse Build ID: " + PlatformInfo.getEclipseBuildId() + CR; //$NON-NLS-1$
    c += "IDE Name: " + PlatformInfo.getIDEName() + CR; //$NON-NLS-1$
    c += "IDE Version: " + PlatformInfo.getIDEVersionString() + CR; //$NON-NLS-1$
    c += "IDE NL: " + PlatformInfo.getIDENL() + CR; //$NON-NLS-1$
    c += "Eclipse Commands: " //$NON-NLS-1$
            + StringUtils.replaceChars(getSystemProperty("eclipse.commands"), "\n\r", " ") //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
            + CR;
    c += "Eclipse VM: " + getSystemProperty("eclipse.vm") + CR; //$NON-NLS-1$ //$NON-NLS-2$
    c += "Eclipse VM Args: " + getSystemProperty("eclipse.vmargs") + CR; //$NON-NLS-1$ //$NON-NLS-2$
    c += "OS Name: " + getSystemProperty("os.name") + CR; //$NON-NLS-1$ //$NON-NLS-2$
    c += "OS Arch: " + getSystemProperty("os.arch") + CR; //$NON-NLS-1$ //$NON-NLS-2$
    c += "OS Version: " + getSystemProperty("os.version") + CR; //$NON-NLS-1$ //$NON-NLS-2$
    String linuxDescription = getLinuxDescription();
    if (!StringUtils.isEmpty(linuxDescription)) {
        c += "Linux Description: " + linuxDescription + CR; //$NON-NLS-1$
    }
    String m_mozillaResult = tryCreateMozilla();
    if (!StringUtils.isEmpty(m_mozillaResult)) {
        c += "Browser Creation Result: " + m_mozillaResult + CR; //$NON-NLS-1$
    }
    Runtime runtime = Runtime.getRuntime();
    c += "Available Processors: " + runtime.availableProcessors() + CR; //$NON-NLS-1$
    c += "Memory Max: " + runtime.maxMemory() + CR; //$NON-NLS-1$
    c += "Memory Total: " + runtime.totalMemory() + CR; //$NON-NLS-1$
    c += "Memory Free: " + runtime.freeMemory() + CR; //$NON-NLS-1$
    c += "Java Vendor: " + getSystemProperty("java.vendor") + CR; //$NON-NLS-1$ //$NON-NLS-2$
    c += "Java Version: " + getSystemProperty("java.version") + CR; //$NON-NLS-1$ //$NON-NLS-2$
    c += "Java Library Path: " + getSystemProperty("java.library.path") + CR; //$NON-NLS-1$ //$NON-NLS-2$
    return c;
}

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From source file:org.apache.solr.handler.admin.SystemInfoHandler.java

/**
 * Get JVM Info - including memory info//from  w w w.  j a v  a 2 s .c o  m
 */
public static SimpleOrderedMap<Object> getJvmInfo() {
    SimpleOrderedMap<Object> jvm = new SimpleOrderedMap<Object>();
    jvm.add("version", System.getProperty("java.vm.version"));
    jvm.add("name", System.getProperty("java.vm.name"));

    Runtime runtime = Runtime.getRuntime();
    jvm.add("processors", runtime.availableProcessors());

    long used = runtime.totalMemory() - runtime.freeMemory();
    // not thread safe, but could be thread local
    DecimalFormat df = new DecimalFormat("#.#");
    double percentUsed = ((double) (used) / (double) runtime.maxMemory()) * 100;

    SimpleOrderedMap<Object> mem = new SimpleOrderedMap<Object>();
    mem.add("free", humanReadableUnits(runtime.freeMemory(), df));
    mem.add("total", humanReadableUnits(runtime.totalMemory(), df));
    mem.add("max", humanReadableUnits(runtime.maxMemory(), df));
    mem.add("used", humanReadableUnits(used, df) + " (%" + df.format(percentUsed) + ")");
    jvm.add("memory", mem);

    // JMX properties -- probably should be moved to a different handler
    SimpleOrderedMap<Object> jmx = new SimpleOrderedMap<Object>();
    try {
        RuntimeMXBean mx = ManagementFactory.getRuntimeMXBean();
        jmx.add("bootclasspath", mx.getBootClassPath());
        jmx.add("classpath", mx.getClassPath());

        // the input arguments passed to the Java virtual machine
        // which does not include the arguments to the main method.
        jmx.add("commandLineArgs", mx.getInputArguments());
        // a map of names and values of all system properties.
        //jmx.add( "SYSTEM PROPERTIES", mx.getSystemProperties());

        jmx.add("startTime", new Date(mx.getStartTime()));
        jmx.add("upTimeMS", mx.getUptime());
    } catch (Exception e) {
        log.warn("Error getting JMX properties", e);
    }
    jvm.add("jmx", jmx);
    return jvm;
}

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From source file:com.searchbox.framework.web.SystemController.java

@ModelAttribute("jvmInfo")
public static Map<String, Object> getJvmInfo() {
    Map<String, Object> jvm = new HashMap<String, Object>();

    final String javaVersion = System.getProperty("java.specification.version", "unknown");
    final String javaVendor = System.getProperty("java.specification.vendor", "unknown");
    final String javaName = System.getProperty("java.specification.name", "unknown");
    final String jreVersion = System.getProperty("java.version", "unknown");
    final String jreVendor = System.getProperty("java.vendor", "unknown");
    final String vmVersion = System.getProperty("java.vm.version", "unknown");
    final String vmVendor = System.getProperty("java.vm.vendor", "unknown");
    final String vmName = System.getProperty("java.vm.name", "unknown");

    // Summary Info
    jvm.put("version", jreVersion + " " + vmVersion);
    jvm.put("name", jreVendor + " " + vmName);

    // details//  ww w.  jav a 2  s  .  c  o  m
    Map<String, Object> java = new HashMap<String, Object>();
    java.put("vendor", javaVendor);
    java.put("name", javaName);
    java.put("version", javaVersion);
    jvm.put("spec", java);
    Map<String, Object> jre = new HashMap<String, Object>();
    jre.put("vendor", jreVendor);
    jre.put("version", jreVersion);
    jvm.put("jre", jre);
    Map<String, Object> vm = new HashMap<String, Object>();
    vm.put("vendor", vmVendor);
    vm.put("name", vmName);
    vm.put("version", vmVersion);
    jvm.put("vm", vm);

    Runtime runtime = Runtime.getRuntime();
    jvm.put("processors", runtime.availableProcessors());

    // not thread safe, but could be thread local
    DecimalFormat df = new DecimalFormat("#.#", DecimalFormatSymbols.getInstance(Locale.ROOT));

    Map<String, Object> mem = new HashMap<String, Object>();
    Map<String, Object> raw = new HashMap<String, Object>();
    long free = runtime.freeMemory();
    long max = runtime.maxMemory();
    long total = runtime.totalMemory();
    long used = total - free;
    double percentUsed = ((double) (used) / (double) max) * 100;
    raw.put("free", free);
    mem.put("free", humanReadableUnits(free, df));
    raw.put("total", total);
    mem.put("total", humanReadableUnits(total, df));
    raw.put("max", max);
    mem.put("max", humanReadableUnits(max, df));
    raw.put("used", used);
    mem.put("used", humanReadableUnits(used, df) + " (%" + df.format(percentUsed) + ")");
    raw.put("used%", percentUsed);

    mem.put("raw", raw);
    jvm.put("memory", mem);

    // JMX properties -- probably should be moved to a different handler
    Map<String, Object> jmx = new HashMap<String, Object>();
    try {
        RuntimeMXBean mx = ManagementFactory.getRuntimeMXBean();
        jmx.put("bootclasspath", mx.getBootClassPath());
        jmx.put("classpath", mx.getClassPath());

        // the input arguments passed to the Java virtual machine
        // which does not include the arguments to the main method.
        jmx.put("commandLineArgs", mx.getInputArguments());

        jmx.put("startTime", new Date(mx.getStartTime()));
        jmx.put("upTimeMS", mx.getUptime());

    } catch (Exception e) {
        LOGGER.warn("Error getting JMX properties", e);
    }
    jvm.put("jmx", jmx);
    return jvm;
}

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From source file:com.bstek.dorado.console.utils.SystemUtils.java

/**
 * ??/*  w w w  .  j  av  a2s  .co m*/
 * 
 * @return
 */
public static Map<String, Object> getMemoryInfo() {
    Map<String, Object> map = new HashMap<String, Object>();
    Runtime runtime = Runtime.getRuntime();
    map.put("runtime", runtime);

    map.put("freeMemory", runtime.freeMemory());
    map.put("totalMemory", runtime.totalMemory());
    if (System.getProperty("java.version").compareTo("1.4") >= 0)
        map.put("maxMemory", runtime.maxMemory());
    else
        map.put("maxMemory", "N/A");

    map.put("CPU", runtime.availableProcessors());
    return map;
}

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