Example usage for java.lang Runtime freeMemory

Introduction

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

Prototype

public native long freeMemory();

Source Link

Document

Returns the amount of free memory in the Java Virtual Machine.

Usage

From source file:com.aestel.chemistry.openEye.fp.Fingerprinter.java

public static void main(String... args) throws IOException {
    long start = System.currentTimeMillis();
    long iCounter = 0;

    // create command line Options object
    Options options = new Options();
    Option opt = new Option("in", true, "input file [.ism,.sdf,...]");
    opt.setRequired(true);//from w  w  w  .  jav  a  2  s . c  o m
    options.addOption(opt);

    opt = new Option("out", true, "output file .tsv or oe-supported");
    opt.setRequired(true);
    options.addOption(opt);

    opt = new Option("idTag", true, "field with ID (default title)");
    opt.setRequired(false);
    options.addOption(opt);

    opt = new Option("fpType", true, "fingerPrintType: maccs|linear7|linear7*4|HashLinear7*4\n"
            + "   maccs: generate maccs keys\n"
            + "   linear7 generate 7 bonds long linear fingerprints (210k known rest hashed)\n"
            + "   linear7*4 linear 7 bonds if more than 4 atoms code atoms as * (5.1k known rest hashed)\n"
            + "   HashLinear7*4: as linear7*4 but hashed to 16k");
    opt.setRequired(true);
    options.addOption(opt);

    opt = new Option("format", true,
            "folded512|folded2048|bitList|fragList|none\n" + "   folded512/2048: hex encoded 512/2048 bits\n"
                    + "   bitList: list of bitpositions\n" + "   none: no fp output for use with writeCodeMap");
    opt.setRequired(true);
    options.addOption(opt);

    opt = new Option("writeCodeMap", false, "Overwrite the codeMap file at the end of processing");
    opt.setRequired(false);
    options.addOption(opt);

    CommandLineParser parser = new PosixParser();
    CommandLine cmd = null;
    try {
        cmd = parser.parse(options, args);
    } catch (Exception e) {
        System.err.println(e.getMessage());
        exitWithHelp(options);
    }
    args = cmd.getArgs();

    if (cmd.hasOption("d")) {
        System.err.println("Start debugger and press return:");
        new BufferedReader(new InputStreamReader(System.in)).readLine();
    }

    String idTag = null;
    if (cmd.hasOption("idTag"))
        idTag = cmd.getOptionValue("idTag");

    String outformat = cmd.getOptionValue("format").toLowerCase().intern();
    if (args.length != 0) {
        exitWithHelp(options);
    }

    String type = cmd.getOptionValue("fpType");
    boolean updateDictionaryFile = cmd.hasOption("writeCodeMap");
    boolean hashUnknownFrag = true;
    if (type.equals("HashLinear7*4"))
        hashUnknownFrag = false;
    if (type.equals("maccs"))
        hashUnknownFrag = false;
    if (updateDictionaryFile)
        hashUnknownFrag = false;
    Fingerprinter fprinter = createFingerprinter(type, updateDictionaryFile, hashUnknownFrag);
    OEMolBase mol = new OEGraphMol();

    String inFile = cmd.getOptionValue("in");
    String outFile = cmd.getOptionValue("out");
    oemolistream ifs = new oemolistream(inFile);

    Runtime rt = Runtime.getRuntime();
    Outputter out;
    if (outFile.endsWith(".txt") || outFile.endsWith(".tab"))
        out = new TabOutputter(fprinter.getMapper(), outFile, outformat);
    else
        out = new OEOutputter(fprinter.getMapper(), outFile, type, outformat);

    while (oechem.OEReadMolecule(ifs, mol)) {
        iCounter++;
        Fingerprint fp = fprinter.getFingerprint(mol);

        String id;
        if (idTag == null)
            id = mol.GetTitle();
        else
            id = oechem.OEGetSDData(mol, idTag);

        if (iCounter % 100 == 0)
            System.err.print(".");
        if (iCounter % 4000 == 0) {
            System.err.printf(" %d %dsec\tt=%d f=%d u=%d m=%d tf=%d\n", iCounter,
                    (System.currentTimeMillis() - start) / 1000, rt.totalMemory() / 1024,
                    rt.freeMemory() / 1024, (rt.totalMemory() - rt.freeMemory()) / 1024, rt.maxMemory() / 1024,
                    (rt.freeMemory() + (rt.maxMemory() - rt.totalMemory())) / 1024);
        }

        out.output(id, mol, fp);
    }

    System.err.printf("Fingerprinter: Read %d structures in %d sec\n", iCounter,
            (System.currentTimeMillis() - start) / 1000);

    if (updateDictionaryFile)
        fprinter.writeDictionary();
    out.close();
    fprinter.close();
}

---

From source file:com.yobidrive.diskmap.needles.NeedleManager.java

public static void main(String[] args) {

    try {/*from  w  w w . java2s. c om*/
        BasicConfigurator.configure();
        NeedleManager nw = new NeedleManager("/Users/Francois/Documents/NEEDLES", 1000000000L, 8, 10000000L,
                10000000L, 0);
        nw.initialize();

        Runtime runtime = Runtime.getRuntime();
        long before = runtime.totalMemory() - runtime.freeMemory();

        // Measure cache impact
        for (long i = 0; i < TEST_COUNT; i++) {
            NeedlePointer np = new NeedlePointer();
            np.setNeedleOffset(i);
            Needle n = new Needle();
            n.setKey("kjdskljsdhklgjfdklgh");
            n.setData(new byte[10000]);
            nw.needleHeaderReadCache.put(np, n.getNeedleHeader(np));
        }
        runtime = Runtime.getRuntime();
        long after = runtime.totalMemory() - runtime.freeMemory();
        System.out.println(
                "Usage=" + ((after - before) / TEST_COUNT) + ", total= " + ((after - before) / (1024 * 1024)));

        /*
        long counter = 0 ;
        int initialLogNumber = nw.getLogNumber() ;
        Date startDate = new Date() ;
        System.out.println("Start test for "+TEST_COUNT+" needles with 10K bytes data") ;
        while ( counter < TEST_COUNT ) {
           Needle needle = new Needle() ;
           needle.setKey("KEY_"+counter) ;
           VectorClock vc = new VectorClock(new Date().getTime()) ;
           needle.setVersion(vc) ;
           needle.setData(testData) ;
           nw.writeNewNeedle(needle) ;
           counter++ ;
           if ( counter % 10000 == 0 )
              System.out.print(".") ;
        }
        long timeSpent = new Date().getTime() - startDate.getTime() ;
        System.out.println("\n\nProcessed creation of "+TEST_COUNT+" needles with 10K bytes data each\n"+
          "\tInital log number: "+initialLogNumber+"\n"+
          "\tFinal log number: "+nw.getLogNumber()+"\n"+
          "\tTotal time: "+timeSpent/1000+"s\n"+
          "\tThroughput: "+TEST_COUNT*testData.length/(timeSpent/1000)+" byte/s\n"+
          "\t            "+TEST_COUNT/(timeSpent/1000)+" needle/s") ;
        */
    } catch (Throwable th) {
        th.printStackTrace();
    }

}

---

From source file:org.cloudata.core.tabletserver.ColumnCollection.java

License:asdf

public static void main(String[] args) throws Exception {
    /*/*from  w w w. j a v a 2 s .c  o m*/
    Assuming 32-bit words and a 12 byte overhead per array instance,
    int[4,100,000][2][2][5]
    4th dim. = overhead + length * sizeof(int) = 12 + 5 * 4 = 32
    3rd dim. = overhead + length * (sizeof(ref) + sizeof(4th_dim)) = 12 + 2 * (4 + 32) = 84
    2nd dim. = overhead + length * (sizeof(ref) + sizeof(3rd_dim)) = 12 + 2 * (4 + 84) = 188
    1st dim. = overhead + length * (sizeof(ref) + sizeof(2nd_dim)) = 12 + 4,100,000 * (4 + 188) = 787,200,012
            
    byte[]? ? = 12 + ((length + 3)/8) * 8 + 4
            
    byte?  0 ~ 4 12 + 4 ?
      ???  8 ?
     : 0 ~ 4: 16, 5 ~ 12: 24, 13 ~ 20: 32 
             
     ? Text?  ? header 4byte, byte[] ? 4byte, int length 4byte, length? ? 4 byte = 16 + len(byte[])
    */

    //Cell.Key, Row.Key: 16byte + byte[]
    //ColumnValue: 16 + rowKey, columnKey, value
    //ColumnCollection: ColumnValue + 124

    Runtime runtime = Runtime.getRuntime();
    Cell.Key columnKey = new Cell.Key("123");
    Row.Key rowKey = new Row.Key("123");
    ColumnValue columnValue = new ColumnValue();

    ColumnCollection collection = new ColumnCollection(new CloudataConf());
    collection.addValue(rowKey, new ColumnValue(rowKey, columnKey, "".getBytes()), 0);

    byte[] valueBuf = "0123456789".getBytes();
    byte[] columnKeyBuf = "abcdefghij".getBytes();
    byte[] rowKeyBuf = "!@#$%^&*()".getBytes();

    Cell.Key columnKey2 = new Cell.Key("qwertyuiop".getBytes());
    Row.Key rowKey2 = new Row.Key("asdfghjkl;".getBytes());
    ColumnValue columnValue2 = new ColumnValue(rowKey2, columnKey2, "zxcvbnm,./".getBytes());

    columnKey = new Cell.Key(columnKeyBuf);
    rowKey = new Row.Key(rowKeyBuf);
    columnValue = new ColumnValue(rowKey, columnKey, valueBuf);

    runtime.gc();
    long before = runtime.freeMemory();

    collection.addValue(rowKey, columnValue, 0);
    collection.addValue(rowKey2, columnValue2, 0);

    runtime.gc();
    long after = runtime.freeMemory();

    int byteLen = 12 + ((valueBuf.length + 3) / 8) * 8 + 4;
    int rowKeyLen = 16 + byteLen;
    int columnKeyLen = 16 + byteLen;

    int columnValueLen = 16 + rowKeyLen + columnKeyLen + byteLen;

    System.out.printf("%d - %d = %d, %d\n", before, after, (before - after), columnValueLen);
}

---

From source file:Main.java

public static long getUsedMemorySize() {

    long freeSize = 0L;
    long totalSize = 0L;
    long usedSize = -1L;
    try {/*from   w  ww .  j a  v  a  2 s .  c om*/
        Runtime info = Runtime.getRuntime();
        freeSize = info.freeMemory();
        totalSize = info.totalMemory();
        usedSize = totalSize - freeSize;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return usedSize;

}

---

From source file:Main.java

public static long getUsedMemorySize() {

    long freeSize = 0L;
    long totalSize = 0L;
    long usedSize = -1L;
    try {/*  w w w  .j a v a2 s  . com*/
        Runtime info = Runtime.getRuntime();
        freeSize = info.freeMemory();
        totalSize = info.totalMemory();
        usedSize = totalSize - freeSize;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return usedSize / 1048576L;

}

---

From source file:Main.java

public static long getPhysicalMemorySize() {

    long freeSize = 0L;
    long totalSize = 0L;
    long usedSize = -1L;
    try {/*from  w  ww . j ava  2  s. c  o m*/
        Runtime info = Runtime.getRuntime();
        freeSize = info.freeMemory();
        totalSize = info.totalMemory();
        usedSize = totalSize - freeSize;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return totalSize / 1048576L;

}

---

From source file:Util.java

/**
 * Returns a report of used and available memory.
 * //ww w.j  a  v  a 2  s.com
 * @return a report of used and available memory
 */
@SuppressWarnings("boxing")
public static String memoryReport() {
    Runtime runtime = Runtime.getRuntime();
    long freemem = runtime.freeMemory();
    long totalmem = runtime.totalMemory();
    return String.format(
            "%.1f MB of memory free out of %.1f MB total in JVM (%.1f MB used).  Configured maximum: %.1f MB.",
            freemem / BYTES_PER_MB, totalmem / BYTES_PER_MB, (totalmem - freemem) / BYTES_PER_MB,
            runtime.maxMemory() / BYTES_PER_MB);
}

---

From source file:Main.java

/**
 * Determine the amount of available memory. "Available" memory is calculated as
 * <code>(max - total) + free</code>.
 *
 * @return the number of bytes of memory available according to the above algorithm.
 *//*from w  ww.  j  av a  2s  .  com*/
public static long availableMemory() {
    Runtime rt = Runtime.getRuntime();
    return rt.maxMemory() - rt.totalMemory() + rt.freeMemory();
}

---

From source file:com.qwazr.utils.RuntimeUtils.java

public static long getMemoryUsage() {
    Runtime runtime = Runtime.getRuntime();
    return runtime.totalMemory() - runtime.freeMemory();
}

---

From source file:org.codelibs.fess.util.MemoryUtil.java

public static long getUsedMemory() {
    final Runtime runtime = Runtime.getRuntime();
    final long freeBytes = runtime.freeMemory();
    final long totalBytes = runtime.totalMemory();
    return totalBytes - freeBytes;
}

---

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