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.gc.collection; 27 28 import static jdk.testlibrary.Asserts.assertTrue; 29 30 import java.time.Duration; 31 32 import jdk.jfr.Recording; 33 import jdk.jfr.consumer.RecordedEvent; 34 import jdk.testlibrary.jfr.Events; 35 import jdk.testlibrary.jfr.GCHelper; 36 37 /* 38 * @test 39 * @key jfr 40 * @library /lib/testlibrary 41 * @run main/othervm -verbose:gc -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps jdk.jfr.event.gc.collection.TestGCGarbageCollectionEvent 42 */ 43 public class TestGCGarbageCollectionEvent { 44 45 private final static String EVENT_NAME = GCHelper.event_garbage_collection; 46 47 public static void main(String[] args) throws Exception { 48 Recording recording = new Recording(); 49 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0)); 50 recording.start(); 51 System.gc(); 52 recording.stop(); 53 54 boolean isAnyFound = false; 55 for (RecordedEvent event : Events.fromRecording(recording)) { 56 if (!EVENT_NAME.equals(event.getEventType().getName())) { 57 continue; 58 } 59 System.out.println("Event: " + event); 60 isAnyFound = true; 61 62 long longestPause = Events.assertField(event, "longestPause").atLeast(0L).getValue(); 63 Events.assertField(event, "sumOfPauses").atLeast(longestPause); 64 } 65 assertTrue(isAnyFound, "No matching event found"); 66 } 67 }