271 lines
9.9 KiB
Java
271 lines
9.9 KiB
Java
/*
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* Copyright (c) 2003, 2004, 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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/*
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* @test
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* @bug 4959889
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* @summary Basic unit test of memory management testing:
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* 1) setCollectionUsageThreshold() and getCollectionUsageThreshold()
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* 2) test notification emitted for two different memory pools.
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*
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* @author Mandy Chung
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*
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* @build CollectionUsageThreshold MemoryUtil
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* @run main/timeout=300 CollectionUsageThreshold
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*/
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import java.lang.management.*;
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import java.util.*;
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import javax.management.*;
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import javax.management.openmbean.CompositeData;
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public class CollectionUsageThreshold {
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private static MemoryMXBean mm = ManagementFactory.getMemoryMXBean();
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private static List pools = ManagementFactory.getMemoryPoolMXBeans();
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private static List managers = ManagementFactory.getMemoryManagerMXBeans();
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private static Map result = new HashMap();
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private static boolean trace = false;
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private static boolean testFailed = false;
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private static final int EXPECTED_NUM_POOLS = 2;
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private static final int NUM_GCS = 3;
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private static final int THRESHOLD = 10;
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private static Checker checker;
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private static int numGCs = 0;
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static class PoolRecord {
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private MemoryPoolMXBean pool;
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private int listenerInvoked = 0;
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private long notifCount = 0;
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PoolRecord(MemoryPoolMXBean p) {
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this.pool = p;
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}
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int getListenerInvokedCount() {
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return listenerInvoked;
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}
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long getNotifCount() {
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return notifCount;
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}
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MemoryPoolMXBean getPool() {
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return pool;
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}
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void addNotification(MemoryNotificationInfo minfo) {
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listenerInvoked++;
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notifCount = minfo.getCount();
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}
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}
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static class SensorListener implements NotificationListener {
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private int numNotifs = 0;
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public void handleNotification(Notification notif, Object handback) {
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String type = notif.getType();
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if (type.equals(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED) ||
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type.equals(MemoryNotificationInfo.
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MEMORY_COLLECTION_THRESHOLD_EXCEEDED)) {
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MemoryNotificationInfo minfo = MemoryNotificationInfo.
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from((CompositeData) notif.getUserData());
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MemoryUtil.printMemoryNotificationInfo(minfo, type);
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PoolRecord pr = (PoolRecord) result.get(minfo.getPoolName());
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if (pr == null) {
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throw new RuntimeException("Pool " + minfo.getPoolName() +
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" is not selected");
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}
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if (type != MemoryNotificationInfo.
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MEMORY_COLLECTION_THRESHOLD_EXCEEDED) {
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throw new RuntimeException("Pool " + minfo.getPoolName() +
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" got unexpected notification type: " +
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type);
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}
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pr.addNotification(minfo);
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synchronized (this) {
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numNotifs++;
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if (numNotifs > 0 && (numNotifs % EXPECTED_NUM_POOLS) == 0) {
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checker.goCheckResult();
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}
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}
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}
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}
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}
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private static long newThreshold;
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public static void main(String args[]) throws Exception {
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if (args.length > 0 && args[0].equals("trace")) {
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trace = true;
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}
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if (trace) {
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MemoryUtil.printMemoryPools(pools);
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MemoryUtil.printMemoryManagers(managers);
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}
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// Find the Old generation which supports low memory detection
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for (ListIterator iter = pools.listIterator(); iter.hasNext(); ) {
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MemoryPoolMXBean p = (MemoryPoolMXBean) iter.next();
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MemoryUsage u = p.getUsage();
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if (p.isUsageThresholdSupported() && p.isCollectionUsageThresholdSupported()) {
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PoolRecord pr = new PoolRecord(p);
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result.put(p.getName(), pr);
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if (result.size() == EXPECTED_NUM_POOLS) {
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break;
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}
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}
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}
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if (result.size() != EXPECTED_NUM_POOLS) {
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throw new RuntimeException("Unexpected number of selected pools");
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}
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checker = new Checker("Checker thread");
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checker.setDaemon(true);
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checker.start();
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for (Iterator iter = result.values().iterator(); iter.hasNext();) {
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PoolRecord pr = (PoolRecord) iter.next();
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pr.getPool().setCollectionUsageThreshold(THRESHOLD);
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System.out.println("Collection usage threshold of " +
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pr.getPool().getName() + " set to " + THRESHOLD);
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}
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SensorListener listener = new SensorListener();
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NotificationEmitter emitter = (NotificationEmitter) mm;
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emitter.addNotificationListener(listener, null, null);
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mm.setVerbose(true);
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for (int i = 0; i < NUM_GCS; i++) {
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invokeGC();
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checker.waitForCheckResult();
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}
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if (testFailed)
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throw new RuntimeException("TEST FAILED.");
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System.out.println("Test passed.");
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}
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private static void invokeGC() {
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System.out.println("Calling System.gc()");
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numGCs++;
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mm.gc();
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if (trace) {
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for (Iterator iter = result.values().iterator(); iter.hasNext();) {
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PoolRecord pr = (PoolRecord) iter.next();
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System.out.println("Usage after GC for: " + pr.getPool().getName());
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MemoryUtil.printMemoryUsage(pr.getPool().getUsage());
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}
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}
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}
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static class Checker extends Thread {
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private Object lock = new Object();
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private Object go = new Object();
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private boolean checkerReady = false;
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private int waiters = 0;
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private boolean readyToCheck = false;
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Checker(String name) {
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super(name);
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};
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public void run() {
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while (true) {
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synchronized (lock) {
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checkerReady = true;
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try {
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lock.wait();
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} catch (InterruptedException e) {
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// ignore
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}
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checkResult();
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checkerReady = false;
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}
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}
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}
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private void checkResult() {
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for (Iterator iter = result.values().iterator(); iter.hasNext();) {
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PoolRecord pr = (PoolRecord) iter.next();
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if (pr.getListenerInvokedCount() != numGCs) {
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throw new RuntimeException("Listeners invoked count = " +
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pr.getListenerInvokedCount() + " expected to be " +
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numGCs);
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}
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if (pr.getNotifCount() != numGCs) {
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throw new RuntimeException("Notif Count = " +
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pr.getNotifCount() + " expected to be " +
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numGCs);
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}
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long count = pr.getPool().getCollectionUsageThresholdCount();
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if (count != numGCs) {
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throw new RuntimeException("CollectionUsageThresholdCount = " +
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count + " expected to be " + numGCs);
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}
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if (!pr.getPool().isCollectionUsageThresholdExceeded()) {
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throw new RuntimeException("isCollectionUsageThresholdExceeded" +
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" expected to be true");
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}
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}
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synchronized (go) {
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// wait until the main thread is waiting for notification
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while (waiters == 0) {
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try {
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go.wait(50);
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} catch (InterruptedException e) {
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// ignore
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}
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}
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System.out.println(Thread.currentThread().getName() +
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" notifying main thread to continue - result checking finished");
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go.notify();
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}
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}
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public void goCheckResult() {
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System.out.println(Thread.currentThread().getName() +
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" notifying to check result");
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synchronized (lock) {
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while (!checkerReady) {
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try {
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lock.wait(50);
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} catch (InterruptedException e) {
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// ignore
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}
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}
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lock.notify();
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}
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}
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public void waitForCheckResult() {
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System.out.println(Thread.currentThread().getName() +
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" waiting for result checking finishes");
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synchronized (go) {
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waiters++;
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try {
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go.wait();
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} catch (InterruptedException e) {
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// ignore
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}
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waiters--;
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}
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}
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}
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}
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