1 /* 2 * Copyright (c) 2013, 2018, 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.test.lib.Asserts.assertTrue; 29 30 import java.time.Duration; 31 import java.util.ArrayList; 32 import java.util.List; 33 import java.util.Random; 34 35 import jdk.jfr.Recording; 36 import jdk.jfr.consumer.RecordedEvent; 37 import jdk.test.lib.jfr.EventNames; 38 import jdk.test.lib.jfr.Events; 39 40 /** 41 * @test 42 * @key jfr 43 * 44 * @library /lib / 45 * @run main/othervm jdk.jfr.event.runtime.TestJavaThreadStatisticsEvent 46 */ 47 public class TestJavaThreadStatisticsEvent { 48 private static final String EVENT_NAME = EventNames.JavaThreadStatistics; 49 50 private static final int THREAD_COUNT = 10; 51 private static final Random RAND = new Random(4711); 52 53 // verify thread count: 0 <= daemon <= active <= peak <= accumulated. 54 public static void main(String[] args) throws Throwable { 55 Recording recording = new Recording(); 56 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(10)); 57 recording.start(); 58 59 List<Thread> threads = new ArrayList<>(); 60 for (int i = 0; i < THREAD_COUNT; i++) { 61 Thread thread = new Thread(TestJavaThreadStatisticsEvent::sleepRandom); 62 thread.start(); 63 threads.add(thread); 64 } 65 for (Thread thread : threads) { 66 thread.join(); 67 } 68 69 recording.stop(); 70 List<RecordedEvent> events = Events.fromRecording(recording); 71 boolean isAnyFound = false; 72 for (RecordedEvent event : events) { 73 System.out.println("Event:" + event); 74 isAnyFound = true; 75 // verify thread count: 0 <= daemon <= active <= peak <= accumulated. 76 long daemonCount = Events.assertField(event, "daemonCount").atLeast(0L).getValue(); 77 long activeCount = Events.assertField(event, "activeCount").atLeast(daemonCount).getValue(); 78 long peakCount = Events.assertField(event, "peakCount").atLeast(activeCount).atLeast(1L).getValue(); 79 Events.assertField(event, "accumulatedCount").atLeast(peakCount).getValue(); 80 } 81 assertTrue(isAnyFound, "Correct event not found"); 82 } 83 84 static void sleepRandom() { 85 try { 86 Thread.sleep(RAND.nextInt(10)); 87 } catch (InterruptedException e) { 88 e.printStackTrace(); 89 } 90 } 91 }