| /* |
| * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.jfr.event.runtime; |
| |
| import static jdk.test.lib.Asserts.assertTrue; |
| |
| import java.time.Duration; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Random; |
| |
| import jdk.jfr.Recording; |
| import jdk.jfr.consumer.RecordedEvent; |
| import jdk.test.lib.jfr.EventNames; |
| import jdk.test.lib.jfr.Events; |
| |
| /* |
| * @test |
| * @key jfr |
| * @library /test/lib |
| * @run main/othervm jdk.jfr.event.runtime.TestJavaThreadStatisticsEvent |
| */ |
| public class TestJavaThreadStatisticsEvent { |
| private static final String EVENT_NAME = EventNames.JavaThreadStatistics; |
| |
| private static final int THREAD_COUNT = 10; |
| private static final Random RAND = new Random(4711); |
| |
| // verify thread count: 0 <= daemon <= active <= peak <= accumulated. |
| public static void main(String[] args) throws Throwable { |
| Recording recording = new Recording(); |
| recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(10)); |
| recording.start(); |
| |
| List<Thread> threads = new ArrayList<>(); |
| for (int i = 0; i < THREAD_COUNT; i++) { |
| Thread thread = new Thread(TestJavaThreadStatisticsEvent::sleepRandom); |
| thread.start(); |
| threads.add(thread); |
| } |
| for (Thread thread : threads) { |
| thread.join(); |
| } |
| |
| recording.stop(); |
| List<RecordedEvent> events = Events.fromRecording(recording); |
| boolean isAnyFound = false; |
| for (RecordedEvent event : events) { |
| System.out.println("Event:" + event); |
| isAnyFound = true; |
| // verify thread count: 0 <= daemon <= active <= peak <= accumulated. |
| long daemonCount = Events.assertField(event, "daemonCount").atLeast(0L).getValue(); |
| long activeCount = Events.assertField(event, "activeCount").atLeast(daemonCount).getValue(); |
| long peakCount = Events.assertField(event, "peakCount").atLeast(activeCount).atLeast(1L).getValue(); |
| Events.assertField(event, "accumulatedCount").atLeast(peakCount).getValue(); |
| } |
| assertTrue(isAnyFound, "Correct event not found"); |
| } |
| |
| static void sleepRandom() { |
| try { |
| Thread.sleep(RAND.nextInt(10)); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |