jdk8-mips64-public/hotspot: test/compiler/5091921/Test6959129.java@833b0f92429a

8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill

     1 /*

     2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 /**

    26  * @test

    27  * @bug 6959129

    28  * @summary COMPARISON WITH INTEGER.MAX_INT DOES NOT WORK CORRECTLY IN THE CLIENT VM.

    29  *

    30  * @run main/othervm -ea Test6959129

    31  */

    33 public class Test6959129 {

    35   public static void main(String[] args) {

    36     long start  = System.currentTimeMillis();

    37     int min = Integer.MAX_VALUE-30000;

    38     int max = Integer.MAX_VALUE;

    39     long maxmoves = 0;

    40     try {

    41       maxmoves = maxMoves(min, max);

    42     } catch (AssertionError e) {

    43       System.out.println("Passed");

    44       System.exit(95);

    45     }

    46     System.out.println("maxMove:" + maxmoves);

    47     System.out.println("FAILED");

    48     System.exit(97);

    49   }

    50   /**

    51    * Imperative implementation that returns the length hailstone moves

    52    * for a given number.

    53    */

    54   public static long hailstoneLengthImp(long n) {

    55     long moves = 0;

    56     while (n != 1) {

    57       assert n > 1;

    58       if (isEven(n)) {

    59         n = n / 2;

    60       } else {

    61         n = 3 * n + 1;

    62       }

    63       ++moves;

    64     }

    65     return moves;

    66   }

    68   private static boolean isEven(long n) {

    69     return n % 2 == 0;

    70   }

    72   /**

    73    * Returns the maximum length of the hailstone sequence for numbers

    74    * between min to max.

    75    *

    76    * For rec1 - Assume that min is bigger than max.

    77    */

    78   public static long maxMoves(int min, int max) {

    79     long maxmoves = 0;

    80     for (int n = min; n <= max; n++) {

    81       if ((n & 1023) == 0) System.out.println(n);

    82       long moves = hailstoneLengthImp(n);

    83       if (moves > maxmoves) {

    84         maxmoves = moves;

    85       }

    86     }

    87     return maxmoves;

    88   }

    89 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/compiler/5091921/Test6959129.java@833b0f92429a

test/compiler/5091921/Test6959129.java