ThresholdNotificationsTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test ThresholdNotificationsTest
 * @summary testing of getUsageThreshold()
 * @library /test/lib /
 * @modules java.base/jdk.internal.misc
 *          java.management
 *
 * @build sun.hotspot.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing
 *     -XX:+WhiteBoxAPI -XX:-MethodFlushing -XX:CompileCommand=compileonly,null::*
 *     -XX:+SegmentedCodeCache
 *     compiler.codecache.jmx.ThresholdNotificationsTest
 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing
 *     -XX:+WhiteBoxAPI -XX:-MethodFlushing -XX:CompileCommand=compileonly,null::*
 *     -XX:-SegmentedCodeCache
 *     compiler.codecache.jmx.ThresholdNotificationsTest
 */

package compiler.codecache.jmx;

import jdk.test.lib.Asserts;
import jdk.test.lib.Utils;
import sun.hotspot.code.BlobType;

import javax.management.ListenerNotFoundException;
import javax.management.Notification;
import javax.management.NotificationEmitter;
import javax.management.NotificationListener;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryNotificationInfo;
import java.lang.management.MemoryPoolMXBean;

public class ThresholdNotificationsTest implements NotificationListener {

    private final static long WAIT_TIME = 10000L;
    private volatile long counter;
    private final BlobType btype;

    public static void main(String[] args) {
        for (BlobType bt : BlobType.getAvailable()) {
            if (CodeCacheUtils.isCodeHeapPredictable(bt)) {
                new ThresholdNotificationsTest(bt).runTest();
            }
        }
    }

    public ThresholdNotificationsTest(BlobType btype) {
        this.btype = btype;
        counter = 0L;
        CodeCacheUtils.disableCollectionUsageThresholds();
    }

    @Override
    public void handleNotification(Notification notification, Object handback) {
        String nType = notification.getType();
        String poolName
                = CodeCacheUtils.getPoolNameFromNotification(notification);
        // consider code cache events only
        if (CodeCacheUtils.isAvailableCodeHeapPoolName(poolName)) {
            Asserts.assertEQ(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED,
                    nType, "Unexpected event received: " + nType);
            if (poolName.equals(btype.getMemoryPool().getName())) {
                counter++;
            }
        }
    }

    protected void runTest() {
        int iterationsCount
                = Integer.getInteger("jdk.test.lib.iterations", 1);
        MemoryPoolMXBean bean = btype.getMemoryPool();
        ((NotificationEmitter) ManagementFactory.getMemoryMXBean()).
                addNotificationListener(this, null, null);
        for (int i = 0; i < iterationsCount; i++) {
            CodeCacheUtils.hitUsageThreshold(bean, btype);
        }
        Asserts.assertTrue(
                Utils.waitForCondition(
                        () -> (CodeCacheUtils.isCodeHeapPredictable(btype) ?
                                (counter == iterationsCount) : (counter >= iterationsCount)),
                        WAIT_TIME),
                "Couldn't receive expected notifications count");
        try {
            ((NotificationEmitter) ManagementFactory.getMemoryMXBean()).
                    removeNotificationListener(this);
        } catch (ListenerNotFoundException ex) {
            throw new AssertionError("Can't remove notification listener", ex);
        }
        System.out.printf("INFO: Scenario finished successfully for %s%n",
                bean.getName());
    }
}