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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * accompanied this code).
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package jdk.jfr.event.gc.detailed;

import java.time.Duration;
import java.util.List;

import static gc.testlibrary.Allocation.blackHole;
import jdk.jfr.Recording;
import jdk.jfr.consumer.RecordedEvent;
import jdk.test.lib.jfr.EventNames;
import jdk.test.lib.jfr.Events;

/**
 * @test TestZAllocationStallEvent
 * @requires vm.hasJFR & vm.gc.Z
 * @key jfr
 * @library /test/lib /test/jdk /test/hotspot/jtreg
 * @run main/othervm -XX:+UseZGC -Xmx32M jdk.jfr.event.gc.detailed.TestZAllocationStallEvent
 */

public class TestZAllocationStallEvent {
    public static void main(String[] args) throws Exception {
        try (Recording recording = new Recording()) {
            // Activate the event we are interested in and start recording
            recording.enable(EventNames.ZAllocationStall).withThreshold(Duration.ofMillis(0));
            recording.start();

            // Allocate objects many large objects quickly, to out run the GC
            for (int i = 0; i < 100; i++) {
                blackHole(new byte[16 * 1024 * 1024]);
            }

            recording.stop();

            // Verify recording
            List<RecordedEvent> events = Events.fromRecording(recording);
            System.out.println("Events: " + events.size());
            Events.hasEvents(events);
        }
    }
}