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25 package jdk.jfr.event.gc.detailed;
26 
27 import java.util.List;
28 
29 import jdk.jfr.Recording;
30 import jdk.jfr.consumer.RecordedEvent;
31 import jdk.test.lib.jfr.EventNames;
32 import jdk.test.lib.jfr.Events;
33 
34 /**
35  * @test
36  * @key jfr
37  * @requires vm.hasJFR
38  * @requires vm.gc == "G1" | vm.gc == null
39  * @library /test/lib /test/jdk
40  * @run main/othervm -XX:NewSize=2m -XX:MaxNewSize=2m -Xmx32m -XX:+UseG1GC -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -XX:-G1UseAdaptiveIHOP jdk.jfr.event.gc.detailed.TestG1IHOPEvent
41  * @run main/othervm -XX:NewSize=2m -XX:MaxNewSize=2m -Xmx32m -XX:+UseG1GC -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -XX:+G1UseAdaptiveIHOP jdk.jfr.event.gc.detailed.TestG1IHOPEvent
42  */
43 public class TestG1IHOPEvent {
44 
45     private final static String EVENT_NAME = EventNames.G1BasicIHOP;
46     public static byte[] bytes;
47 
main(String[] args)48     public static void main(String[] args) throws Exception {
49 
50         Recording recording = new Recording();
51 
52         // activate the event we are interested in and start recording
53         recording.enable(EVENT_NAME);
54         recording.start();
55 
56         // Setting NewSize and MaxNewSize will limit eden, so
57         // allocating 1024 5k byte arrays should trigger at
58         // least one Young GC.
59         for (int i = 0; i < 1024; i++) {
60             bytes= new byte[5 * 1024];
61         }
62         recording.stop();
63 
64         // Verify recording
65         List<RecordedEvent> all = Events.fromRecording(recording);
66         Events.hasEvents(all);
67 
68         for (RecordedEvent e : all) {
69             Events.assertField(e, "gcId").above(0);
70         }
71 
72         recording.close();
73 
74     }
75 }
76