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25 
26 package jdk.jfr.event.gc.collection;
27 
28 import java.time.Duration;
29 import java.util.List;
30 
31 import jdk.jfr.Recording;
32 import jdk.jfr.consumer.RecordedEvent;
33 import jdk.test.lib.jfr.Events;
34 import jdk.test.lib.jfr.GCHelper;
35 
36 /**
37  * @test
38  * @key jfr
39  * @requires vm.hasJFR
40   * @requires vm.gc == "Parallel" | vm.gc == null
41  * @library /test/lib /test/jdk
42  * @run main/othervm -XX:+UseParallelGC -XX:+UseParallelOldGC jdk.jfr.event.gc.collection.TestGCWithFasttime
43  */
44 public class TestGCWithFasttime {
45     private static final String EVENT_NAME = GCHelper.event_garbage_collection;
46 
47     // TODO: Check if all GC tests can be run with fast time. If so, this test is probably not needed.
main(String[] args)48     public static void main(String[] args) throws Exception {
49         Recording recording = new Recording();
50         recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0));
51         recording.start();
52         System.gc();
53         System.gc();
54         recording.stop();
55 
56         List<RecordedEvent> events = Events.fromRecording(recording);
57         Events.hasEvents(events);
58         for (RecordedEvent event : events) {
59             if (!EVENT_NAME.equals(event.getEventType().getName())) {
60                 continue;
61             }
62             Events.assertField(event, "name").notEmpty();
63             Events.assertField(event, "cause").notEmpty();
64         }
65     }
66 }
67