1 /* 2 * Copyright (c) 2015, 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 package jdk.jfr.event.gc.detailed; 26 27 import java.util.List; 28 29 import jdk.jfr.Recording; 30 import jdk.jfr.consumer.RecordedEvent; 31 import jdk.test.lib.jfr.EventNames; 32 import jdk.test.lib.jfr.Events; 33 34 /** 35 * @test 36 * @key jfr 37 * 38 * 39 * @library /lib / 40 * @run main/othervm -XX:NewSize=2m -XX:MaxNewSize=2m -Xmx32m -XX:+UseG1GC -XX:MaxGCPauseMillis=75 -XX:GCPauseIntervalMillis=150 -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps jdk.jfr.event.gc.detailed.TestG1MMUEvent 41 */ 42 public class TestG1MMUEvent { 43 44 // Corresponds to command-line setting -XX:GCPauseIntervalMillis=150 45 private final static double TIME_SLICE = 0.15; 46 47 // Corresponds to command-line setting -XX:MaxGCPauseMillis=75 48 private final static double MAX_GC_TIME = 0.075; 49 50 private final static String EVENT_NAME = EventNames.G1MMU; 51 52 public static byte[] bytes; 53 main(String[] args)54 public static void main(String[] args) throws Exception { 55 56 Recording recording = new Recording(); 57 58 // activate the event we are interested in and start recording 59 recording.enable(EVENT_NAME); 60 recording.start(); 61 62 // Setting NewSize and MaxNewSize will limit eden, so 63 // allocating 1024 5k byte arrays should trigger at 64 // least one Young GC. 65 for (int i = 0; i < 1024; i++) { 66 bytes = new byte[5 * 1024]; 67 } 68 recording.stop(); 69 70 // Verify recording 71 List<RecordedEvent> all = Events.fromRecording(recording); 72 Events.hasEvents(all); 73 74 for (RecordedEvent e : all) { 75 Events.assertField(e, "gcId").above(0); 76 Events.assertField(e, "timeSlice").isEqual(TIME_SLICE); 77 Events.assertField(e, "pauseTarget").isEqual(MAX_GC_TIME); 78 } 79 80 recording.close(); 81 } 82 } 83