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