20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.io.PrintStream;
  25 import java.util.ArrayList;
  26 import java.util.List;
  27 import java.util.Map;
  28 import java.util.Random;
  29 import sun.hotspot.WhiteBox;
  30 
  31 /*
  32  * @test TestMultiThreadStressRSet.java
  33  * @key stress
  34  * @requires vm.gc.G1
  35  * @requires os.maxMemory > 2G
  36  * @requires vm.opt.MaxGCPauseMillis == "null"
  37  *
  38  * @summary Stress G1 Remembered Set using multiple threads
  39  * @modules java.base/jdk.internal.misc
  40  * @library /test/lib /testlibrary
  41  * @build sun.hotspot.WhiteBox
  42  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  43  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  44  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  45  *   -XX:+UseG1GC -XX:G1SummarizeRSetStatsPeriod=1 -Xlog:gc
  46  *   -Xmx500m -XX:G1HeapRegionSize=1m -XX:MaxGCPauseMillis=1000 TestMultiThreadStressRSet 10 4
  47  *
  48  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  49  *   -XX:+UseG1GC -XX:G1SummarizeRSetStatsPeriod=100 -Xlog:gc
  50  *   -Xmx1G -XX:G1HeapRegionSize=8m -XX:MaxGCPauseMillis=1000 TestMultiThreadStressRSet 60 16
  51  *
  52  * @run main/othervm/timeout=700 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  53  *   -XX:+UseG1GC -XX:G1SummarizeRSetStatsPeriod=100 -Xlog:gc
  54  *   -Xmx500m -XX:G1HeapRegionSize=1m -XX:MaxGCPauseMillis=1000 TestMultiThreadStressRSet 600 32
  55  */
  56 public class TestMultiThreadStressRSet {
  57 
  58     private static final Random RND = new Random(2015 * 2016);
  59     private static final WhiteBox WB = WhiteBox.getWhiteBox();
  60     private static final int REF_SIZE = WB.getHeapOopSize();

  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.io.PrintStream;
  25 import java.util.ArrayList;
  26 import java.util.List;
  27 import java.util.Map;
  28 import java.util.Random;
  29 import sun.hotspot.WhiteBox;
  30 
  31 /*
  32  * @test TestMultiThreadStressRSet.java
  33  * @key stress
  34  * @requires vm.gc.G1
  35  * @requires os.maxMemory > 2G
  36  * @requires vm.opt.MaxGCPauseMillis == "null"
  37  *
  38  * @summary Stress G1 Remembered Set using multiple threads
  39  * @modules java.base/jdk.internal.misc
  40  * @library /test/lib
  41  * @build sun.hotspot.WhiteBox
  42  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  43  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  44  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  45  *   -XX:+UseG1GC -XX:G1SummarizeRSetStatsPeriod=1 -Xlog:gc
  46  *   -Xmx500m -XX:G1HeapRegionSize=1m -XX:MaxGCPauseMillis=1000 TestMultiThreadStressRSet 10 4
  47  *
  48  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  49  *   -XX:+UseG1GC -XX:G1SummarizeRSetStatsPeriod=100 -Xlog:gc
  50  *   -Xmx1G -XX:G1HeapRegionSize=8m -XX:MaxGCPauseMillis=1000 TestMultiThreadStressRSet 60 16
  51  *
  52  * @run main/othervm/timeout=700 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  53  *   -XX:+UseG1GC -XX:G1SummarizeRSetStatsPeriod=100 -Xlog:gc
  54  *   -Xmx500m -XX:G1HeapRegionSize=1m -XX:MaxGCPauseMillis=1000 TestMultiThreadStressRSet 600 32
  55  */
  56 public class TestMultiThreadStressRSet {
  57 
  58     private static final Random RND = new Random(2015 * 2016);
  59     private static final WhiteBox WB = WhiteBox.getWhiteBox();
  60     private static final int REF_SIZE = WB.getHeapOopSize();