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.gc.collection; 27 28 import static jdk.test.lib.Asserts.assertTrue; 29 30 import java.time.Duration; 31 32 import jdk.jfr.Recording; 33 import jdk.jfr.consumer.RecordedEvent; 34 import jdk.test.lib.jfr.Events; 35 import jdk.test.lib.jfr.GCHelper; 36 37 /** 38 * @test 39 * @key jfr 40 * @requires vm.hasJFR 41 * @library /test/lib 42 * @run main/othervm -Xlog:gc*=debug -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps jdk.jfr.event.gc.collection.TestGCGarbageCollectionEvent 43 */ 44 public class TestGCGarbageCollectionEvent { 45 46 private final static String EVENT_NAME = GCHelper.event_garbage_collection; 47 48 public static void main(String[] args) throws Exception { 49 Recording recording = new Recording(); 50 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0)); 51 recording.start(); 52 System.gc(); 53 recording.stop(); 54 55 boolean isAnyFound = false; 56 for (RecordedEvent event : Events.fromRecording(recording)) { 57 if (!EVENT_NAME.equals(event.getEventType().getName())) { 58 continue; 59 } 60 System.out.println("Event: " + event); 61 isAnyFound = true; 62 63 long longestPause = Events.assertField(event, "longestPause").atLeast(0L).getValue(); 64 Events.assertField(event, "sumOfPauses").atLeast(longestPause); 65 } 66 assertTrue(isAnyFound, "No matching event found"); 67 } 68 }