1 /*
   2  * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 /*
  25  * @test SieveObjects
  26  * @summary Acceptance tests: collector can deal with retained objects
  27  *
  28  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g                                         -XX:+ShenandoahVerify SieveObjects
  29  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=passive      -XX:+ShenandoahVerify SieveObjects
  30  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=adaptive     -XX:+ShenandoahVerify SieveObjects
  31  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=static       -XX:+ShenandoahVerify SieveObjects
  32  *
  33  * @run main/othervm/timeout=240 -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:-UseTLAB                -XX:+ShenandoahVerify SieveObjects
  34  *
  35  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g                                         SieveObjects
  36  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=passive      SieveObjects
  37  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=adaptive     SieveObjects
  38  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=static       SieveObjects
  39  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=compact      SieveObjects
  40  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=aggressive   SieveObjects
  41  *
  42  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=aggressive   -XX:+ShenandoahOOMDuringEvacALot SieveObjects
  43  * @run main/othervm -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahGCHeuristics=aggressive   -XX:+ShenandoahAllocFailureALot  SieveObjects
  44  */
  45 
  46 import java.util.concurrent.ThreadLocalRandom;
  47 
  48 public class SieveObjects {
  49 
  50   static final int COUNT = 100_000_000;
  51   static final int WINDOW = 1_000_000;
  52   static final int PAYLOAD = 100;
  53 
  54   static final MyObject[] arr = new MyObject[WINDOW];
  55 
  56   public static void main(String[] args) throws Exception {
  57     int rIdx = 0;
  58     for (int c = 0; c < COUNT; c++) {
  59       MyObject v = arr[rIdx];
  60       if (v != null) {
  61         if (v.x != rIdx) {
  62           throw new IllegalStateException("Illegal value at index " + rIdx + ": " + v.x);
  63         }
  64         if (ThreadLocalRandom.current().nextInt(1000) > 100) {
  65           arr[rIdx] = null;
  66         }
  67       } else {
  68         if (ThreadLocalRandom.current().nextInt(1000) > 500) {
  69           arr[rIdx] = new MyObject(rIdx);
  70         }
  71       }
  72       rIdx++;
  73       if (rIdx >= WINDOW) {
  74         rIdx = 0;
  75       }
  76     }
  77   }
  78 
  79   public static class MyObject {
  80     public int x;
  81     public byte[] payload;
  82     public MyObject(int x) {
  83       this.x = x;
  84       this.payload = new byte[PAYLOAD];
  85     }
  86   }
  87 
  88 }