280 lines
11 KiB
Java
280 lines
11 KiB
Java
/*
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* Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package gc.z;
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/**
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* @test TestGarbageCollectorMXBean
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* @requires vm.gc.Z
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* @summary Test ZGC garbage collector MXBean
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* @modules java.management
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* @requires vm.compMode != "Xcomp"
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* @run main/othervm -XX:+UseZGC -Xms256M -Xmx512M -Xlog:gc gc.z.TestGarbageCollectorMXBean 256 512
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* @run main/othervm -XX:+UseZGC -Xms512M -Xmx512M -Xlog:gc gc.z.TestGarbageCollectorMXBean 512 512
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*/
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import java.lang.management.ManagementFactory;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.atomic.AtomicLong;
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import javax.management.Notification;
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import javax.management.NotificationEmitter;
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import javax.management.NotificationListener;
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import javax.management.openmbean.CompositeData;
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import com.sun.management.GarbageCollectionNotificationInfo;
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public class TestGarbageCollectorMXBean {
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private static final long startTime = System.nanoTime();
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private static void log(String msg) {
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final String elapsedSeconds = String.format("%.3fs", (System.nanoTime() - startTime) / 1_000_000_000.0);
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System.out.println("[" + elapsedSeconds + "] (" + Thread.currentThread().getName() + ") " + msg);
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}
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public static void main(String[] args) throws Exception {
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final long M = 1024 * 1024;
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final long initialCapacity = Long.parseLong(args[0]) * M;
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final long maxCapacity = Long.parseLong(args[1]) * M;
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final AtomicInteger cycles = new AtomicInteger();
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final AtomicInteger pauses = new AtomicInteger();
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final AtomicInteger errors = new AtomicInteger();
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final NotificationListener listener = (Notification notification, Object ignored) -> {
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final var type = notification.getType();
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if (!type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
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// Ignore
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return;
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}
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final var data = (CompositeData)notification.getUserData();
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final var info = GarbageCollectionNotificationInfo.from(data);
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final var name = info.getGcName();
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final var id = info.getGcInfo().getId();
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final var action = info.getGcAction();
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final var cause = info.getGcCause();
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final var startTime = info.getGcInfo().getStartTime();
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final var endTime = info.getGcInfo().getEndTime();
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final var duration = info.getGcInfo().getDuration();
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final var youngMemoryUsageBeforeGC = info.getGcInfo().getMemoryUsageBeforeGc().get("ZGC Young Generation");
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final var youngMemoryUsageAfterGC = info.getGcInfo().getMemoryUsageAfterGc().get("ZGC Young Generation");
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final var oldMemoryUsageBeforeGC = info.getGcInfo().getMemoryUsageBeforeGc().get("ZGC Old Generation");
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final var oldMemoryUsageAfterGC = info.getGcInfo().getMemoryUsageAfterGc().get("ZGC Old Generation");
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log(name + " (" + type + ")");
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log(" Id: " + id);
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log(" Action: " + action);
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log(" Cause: " + cause);
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log(" StartTime: " + startTime);
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log(" EndTime: " + endTime);
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log(" Duration: " + duration);
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log(" Young MemoryUsageBeforeGC: " + youngMemoryUsageBeforeGC);
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log(" Young MemoryUsageAfterGC: " + youngMemoryUsageAfterGC);
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log(" Old MemoryUsageBeforeGC: " + oldMemoryUsageBeforeGC);
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log(" Old MemoryUsageAfterGC: " + oldMemoryUsageAfterGC);
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log("");
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if (name.equals("ZGC Major Cycles")) {
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cycles.incrementAndGet();
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if (!action.equals("end of GC cycle")) {
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log("ERROR: Action");
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errors.incrementAndGet();
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}
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if (oldMemoryUsageBeforeGC.getInit() != 0) {
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log("ERROR: Old MemoryUsageBeforeGC.init");
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errors.incrementAndGet();
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}
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if (oldMemoryUsageBeforeGC.getUsed() > initialCapacity) {
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log("ERROR: Old MemoryUsageBeforeGC.used");
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errors.incrementAndGet();
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}
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if (oldMemoryUsageBeforeGC.getCommitted() != oldMemoryUsageBeforeGC.getUsed()) {
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log("ERROR: Old MemoryUsageBeforeGC.committed");
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errors.incrementAndGet();
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}
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if (oldMemoryUsageBeforeGC.getMax() != maxCapacity) {
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log("ERROR: Old MemoryUsageBeforeGC.max");
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errors.incrementAndGet();
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}
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} else if (name.equals("ZGC Major Pauses")) {
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pauses.incrementAndGet();
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if (!action.equals("end of GC pause")) {
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log("ERROR: Action");
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errors.incrementAndGet();
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}
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if (oldMemoryUsageBeforeGC.getInit() != 0) {
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log("ERROR: Old MemoryUsageBeforeGC.init");
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errors.incrementAndGet();
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}
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if (oldMemoryUsageBeforeGC.getUsed() != 0) {
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log("ERROR: Old MemoryUsageBeforeGC.used");
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errors.incrementAndGet();
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}
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if (oldMemoryUsageBeforeGC.getCommitted() != 0) {
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log("ERROR: Old MemoryUsageBeforeGC.committed");
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errors.incrementAndGet();
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}
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if (oldMemoryUsageBeforeGC.getMax() != 0) {
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log("ERROR: Old MemoryUsageBeforeGC.max");
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errors.incrementAndGet();
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}
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} else if (name.equals("ZGC Minor Cycles")) {
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cycles.incrementAndGet();
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if (!action.equals("end of GC cycle")) {
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log("ERROR: Action");
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errors.incrementAndGet();
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}
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if (youngMemoryUsageBeforeGC.getInit() != initialCapacity) {
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log("ERROR: Young MemoryUsageBeforeGC.init");
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errors.incrementAndGet();
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}
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if (youngMemoryUsageBeforeGC.getUsed() > youngMemoryUsageBeforeGC.getCommitted()) {
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log("ERROR: Young MemoryUsageBeforeGC.used");
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errors.incrementAndGet();
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}
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if (youngMemoryUsageBeforeGC.getCommitted() > initialCapacity) {
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log("ERROR: Young MemoryUsageBeforeGC.committed");
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errors.incrementAndGet();
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}
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if (youngMemoryUsageBeforeGC.getMax() != maxCapacity) {
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log("ERROR: Young MemoryUsageBeforeGC.max");
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errors.incrementAndGet();
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}
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} else if (name.equals("ZGC Minor Pauses")) {
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pauses.incrementAndGet();
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if (!action.equals("end of GC pause")) {
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log("ERROR: Action");
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errors.incrementAndGet();
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}
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if (youngMemoryUsageBeforeGC.getInit() != 0) {
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log("ERROR: Young MemoryUsageBeforeGC.init");
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errors.incrementAndGet();
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}
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if (youngMemoryUsageBeforeGC.getUsed() != 0) {
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log("ERROR: Young MemoryUsageBeforeGC.used");
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errors.incrementAndGet();
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}
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if (youngMemoryUsageBeforeGC.getCommitted() != 0) {
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log("ERROR: Young MemoryUsageBeforeGC.committed");
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errors.incrementAndGet();
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}
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if (youngMemoryUsageBeforeGC.getMax() != 0) {
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log("ERROR: Young MemoryUsageBeforeGC.max");
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errors.incrementAndGet();
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}
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} else {
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log("ERROR: Name");
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errors.incrementAndGet();
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}
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//if (!cause.equals("System.gc()")) {
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// log("ERROR: Cause");
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// errors.incrementAndGet();
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//}
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if (startTime > endTime) {
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log("ERROR: StartTime");
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errors.incrementAndGet();
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}
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if (endTime - startTime != duration) {
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log("ERROR: Duration");
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errors.incrementAndGet();
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}
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};
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// Collect garbage created at startup
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System.gc();
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// Register GC event listener
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for (final var collector : ManagementFactory.getGarbageCollectorMXBeans()) {
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final NotificationEmitter emitter = (NotificationEmitter)collector;
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emitter.addNotificationListener(listener, null, null);
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}
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final int minCycles = 5;
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final int minPauses = minCycles * 3;
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// Run GCs
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for (int i = 0; i < minCycles; i++) {
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log("Starting GC " + i);
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System.gc();
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}
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// Wait at most 90 seconds
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for (int i = 0; i < 90; i++) {
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log("Waiting...");
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Thread.sleep(1000);
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if (cycles.get() >= minCycles) {
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log("All events received!");
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break;
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}
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}
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final int actualCycles = cycles.get();
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final int actualPauses = pauses.get();
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final int actualErrors = errors.get();
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log(" minCycles: " + minCycles);
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log(" minPauses: " + minPauses);
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log("actualCycles: " + actualCycles);
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log("actualPauses: " + actualPauses);
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log("actualErrors: " + actualErrors);
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// Verify number of cycle events
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if (actualCycles < minCycles) {
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throw new Exception("Unexpected cycles");
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}
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// Verify number of pause events
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if (actualPauses < minPauses) {
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throw new Exception("Unexpected pauses");
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}
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// Verify number of errors
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if (actualErrors != 0) {
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throw new Exception("Unexpected errors");
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}
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}
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}
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