UsageThresholdExceededTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test UsageThresholdExceededTest
 * @summary verifying that getUsageThresholdCount() returns correct value
 *     after threshold has been hit
 * @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 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *     -XX:+WhiteBoxAPI -XX:-UseCodeCacheFlushing  -XX:-MethodFlushing
 *     -XX:CompileCommand=compileonly,null::*
 *     -XX:+SegmentedCodeCache
 *     compiler.codecache.jmx.UsageThresholdExceededTest
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *     -XX:+WhiteBoxAPI -XX:-UseCodeCacheFlushing  -XX:-MethodFlushing
 *     -XX:CompileCommand=compileonly,null::*
 *     -XX:-SegmentedCodeCache
 *     compiler.codecache.jmx.UsageThresholdExceededTest
 */

package compiler.codecache.jmx;

import sun.hotspot.code.BlobType;

import java.lang.management.MemoryPoolMXBean;

public class UsageThresholdExceededTest {

    protected final int iterations;
    private final BlobType btype;

    public UsageThresholdExceededTest(BlobType btype, int iterations) {
        this.btype = btype;
        this.iterations = iterations;
    }

    public static void main(String[] args) {
        int iterationsCount = Integer.getInteger("jdk.test.lib.iterations", 1);
        for (BlobType btype : BlobType.getAvailable()) {
            if (CodeCacheUtils.isCodeHeapPredictable(btype)) {
                new UsageThresholdExceededTest(btype, iterationsCount).runTest();
            }
        }
    }

    protected void runTest() {
        MemoryPoolMXBean bean = btype.getMemoryPool();
        long oldValue = bean.getUsageThresholdCount();
        for (int i = 0; i < iterations; i++) {
            CodeCacheUtils.hitUsageThreshold(bean, btype);
        }
        CodeCacheUtils.assertEQorGTE(btype, bean.getUsageThresholdCount(), oldValue + iterations,
                "Unexpected threshold usage count");
        System.out.printf("INFO: Scenario finished successfully for %s%n", bean.getName());
    }
}