1 /*
   2  * Copyright (c) 2020, Red Hat, Inc. 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  */
  24 
  25 /*
  26  * @test TestDynamicSoftMaxHeapSize
  27  * @library /testlibrary
  28  *
  29  * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  30  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
  31  *      -XX:+ShenandoahDegeneratedGC
  32  *      -Dtarget=10000
  33  *      TestDynamicSoftMaxHeapSize
  34  *
  35  * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  36  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
  37  *      -XX:-ShenandoahDegeneratedGC
  38  *      -Dtarget=10000
  39  *      TestDynamicSoftMaxHeapSize
  40  */
  41 
  42 /*
  43  * @test TestDynamicSoftMaxHeapSize
  44  * @library /testlibrary
  45  *
  46  * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  47  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
  48  *      -Dtarget=1000
  49  *      TestDynamicSoftMaxHeapSize
  50  */
  51 
  52 /*
  53  * @test TestDynamicSoftMaxHeapSize
  54  * @library /testlibrary
  55  *
  56  * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  57  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
  58  *      -Dtarget=10000
  59  *      TestDynamicSoftMaxHeapSize
  60  */
  61 
  62 /*
  63  * @test TestDynamicSoftMaxHeapSize
  64  * @library /testlibrary
  65  *
  66  * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  67  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
  68  *      -Dtarget=10000
  69  *      TestDynamicSoftMaxHeapSize
  70  */
  71 
  72 /*
  73  * @test TestDynamicSoftMaxHeapSize
  74  * @library /testlibrary
  75  *
  76  * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  77  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
  78  *      -Dtarget=1000
  79  *     TestDynamicSoftMaxHeapSize
  80  */
  81 
  82 /*
  83  * @test TestDynamicSoftMaxHeapSize
  84  * @library /testlibrary
  85  *
  86  * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  87  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive
  88  *      -Dtarget=1000
  89  *      TestDynamicSoftMaxHeapSize
  90  */
  91 
  92 /*
  93  * @test TestDynamicSoftMaxHeapSize
  94  * @library /testlibrary
  95  *
  96  * @run main/othervm -Xms16m -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
  97  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
  98  *      -Dtarget=10000
  99  *      TestDynamicSoftMaxHeapSize
 100  */
 101 
 102 import java.util.Random;
 103 import com.oracle.java.testlibrary.*;
 104 
 105 public class TestDynamicSoftMaxHeapSize {
 106 
 107     static final long TARGET_MB = Long.getLong("target", 10_000); // 10 Gb allocation
 108     static final long STRIDE = 10_000_000;
 109 
 110     static volatile Object sink;
 111 
 112     public static void main(String[] args) throws Exception {
 113         long count = TARGET_MB * 1024 * 1024 / 16;
 114         Random r = new Random();
 115 
 116         String pid = Integer.toString(ProcessTools.getProcessId());
 117         ProcessBuilder pb = new ProcessBuilder();
 118 
 119         for (long c = 0; c < count; c += STRIDE) {
 120             // Sizes specifically include heaps below Xms and above Xmx to test saturation code.
 121             pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.set_flag", "ShenandoahSoftMaxHeapSize", "" + r.nextInt(768*1024*1024)});
 122             pb.start().waitFor();
 123             for (long s = 0; s < STRIDE; s++) {
 124                 sink = new Object();
 125             }
 126             Thread.sleep(1);
 127         }
 128     }
 129 
 130 }