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:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps jdk.jfr.event.gc.detailed.TestG1EvacMemoryStatsEvent
  41  */
  42 public class TestG1EvacMemoryStatsEvent {
  43 
  44     public static byte[] bytes;
  45 
  46     public static void runTest(String event_name) throws Exception {
  47 
  48         Recording recording = new Recording();
  49 
  50         // activate the event we are interested in and start recording
  51         recording.enable(event_name);
  52         recording.start();
  53 
  54         // Setting NewSize and MaxNewSize will limit eden, so
  55         // allocating 1024 5k byte arrays should trigger at
  56         // least one Young GC.
  57         for (int i = 0; i < 1024; i++) {
  58             bytes = new byte[5 * 1024];
  59         }
  60         recording.stop();
  61 
  62         // Verify recording
  63         List<RecordedEvent> all = Events.fromRecording(recording);
  64         for (RecordedEvent e : all) {
  65             Events.assertField(e, "statistics.gcId").above(0);
  66         }
  67 
  68         recording.close();
  69     }
  70 
  71     public static void main(String[] args) throws Exception {
  72         runTest(EventNames.G1EvacuationYoungStatistics);
  73         runTest(EventNames.G1EvacuationOldStatistics);
  74     }
  75 
  76 }