1 /* 2 * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jfr.event.runtime; 27 28 import static jdk.testlibrary.Asserts.assertTrue; 29 30 import java.lang.management.ManagementFactory; 31 import java.lang.management.ThreadMXBean; 32 import java.time.Duration; 33 import java.util.List; 34 35 import jdk.jfr.Recording; 36 import jdk.jfr.consumer.RecordedEvent; 37 import jdk.testlibrary.jfr.EventNames; 38 import jdk.testlibrary.jfr.Events; 39 40 /* 41 * @test 42 * @key jfr 43 * @library /lib/testlibrary 44 * 45 * @run main/othervm jdk.jfr.event.runtime.TestJavaThreadStatisticsEventBean 46 */ 47 public class TestJavaThreadStatisticsEventBean { 48 private final static String EVENT_NAME = EventNames.JavaThreadStatistics; 49 50 // Compare JFR thread counts to ThreadMXBean counts 51 public static void main(String[] args) throws Throwable { 52 long mxDaemonCount = -1; 53 long mxActiveCount = -1; 54 55 // Loop until we are sure no threads were started during the recording. 56 Recording recording = null; 57 ThreadMXBean mxBean = ManagementFactory.getThreadMXBean(); 58 long totalCountBefore = -1; 59 while (totalCountBefore != mxBean.getTotalStartedThreadCount()) { 60 recording = new Recording(); 61 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(10)); 62 totalCountBefore = mxBean.getTotalStartedThreadCount(); 63 recording.start(); 64 mxDaemonCount = mxBean.getDaemonThreadCount(); 65 mxActiveCount = mxBean.getThreadCount(); 66 recording.stop(); 67 final String msg = "testCountByMXBean: threadsBefore=%d, threadsAfter=%d%n"; 68 System.out.format(msg, totalCountBefore, mxBean.getTotalStartedThreadCount()); 69 } 70 71 List<RecordedEvent> events= Events.fromRecording(recording); 72 boolean isAnyFound = false; 73 for (RecordedEvent event : events) { 74 System.out.println("Event:" + event); 75 isAnyFound = true; 76 Events.assertField(event, "daemonCount").equal(mxDaemonCount); 77 Events.assertField(event, "activeCount").equal(mxActiveCount); 78 Events.assertField(event, "accumulatedCount").atLeast(mxActiveCount); 79 Events.assertField(event, "peakCount").atLeast(mxActiveCount); 80 } 81 assertTrue(isAnyFound, "Correct event not found"); 82 } 83 84 }