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.heapsummary;
  27 
  28 import java.time.Duration;
  29 import java.util.List;
  30 
  31 import jdk.jfr.Recording;
  32 import jdk.jfr.consumer.RecordedEvent;
  33 import jdk.test.lib.Asserts;
  34 import jdk.test.lib.jfr.EventNames;
  35 import jdk.test.lib.jfr.Events;
  36 import jdk.test.lib.jfr.GCHelper;
  37 
  38 /**
  39  * @test
  40  * @key jfr
  41  * @requires vm.hasJFR
  42  * @requires (vm.gc == "ConcMarkSweep" | vm.gc == null) & !vm.graal.enabled
  43  *           & vm.opt.ExplicitGCInvokesConcurrent != false
  44  * @library /test/lib /test/jdk
  45  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -XX:+UseConcMarkSweepGC -XX:+ExplicitGCInvokesConcurrent jdk.jfr.event.gc.heapsummary.TestHeapSummaryEventConcurrentCMS
  46  */
  47 public class TestHeapSummaryEventConcurrentCMS {
  48 
  49     public static void main(String[] args) throws Exception {
  50         Recording recording = new Recording();
  51         recording.enable(EventNames.GarbageCollection).withThreshold(Duration.ofMillis(0));
  52         recording.enable(EventNames.GCHeapSummary).withThreshold(Duration.ofMillis(0));
  53 
  54         recording.start();
  55         // Need several GCs to ensure at least one heap summary event from concurrent CMS
  56         GCHelper.callSystemGc(6, true);
  57         recording.stop();
  58 
  59         // Remove first and last GCs which can be incomplete
  60         List<RecordedEvent> events = GCHelper.removeFirstAndLastGC(Events.fromRecording(recording));
  61         Asserts.assertFalse(events.isEmpty(), "No events found");
  62         for (RecordedEvent event : events) {
  63             System.out.println("Event: " + event);
  64             if (!isCmsGcEvent(event)) {
  65                 continue;
  66             }
  67             int gcId = Events.assertField(event, "gcId").getValue();
  68             verifyHeapSummary(events, gcId, "Before GC");
  69             verifyHeapSummary(events, gcId, "After GC");
  70         }
  71     }
  72 
  73     private static boolean isCmsGcEvent(RecordedEvent event) {
  74         if (!Events.isEventType(event, EventNames.GarbageCollection)) {
  75             return false;
  76         }
  77         final String gcName = Events.assertField(event, "name").notEmpty().getValue();
  78         return "ConcurrentMarkSweep".equals(gcName);
  79     }
  80 
  81     private static void verifyHeapSummary(List<RecordedEvent> events, int gcId, String when) {
  82         for (RecordedEvent event : events) {
  83             if (!Events.isEventType(event, EventNames.GCHeapSummary)) {
  84                 continue;
  85             }
  86             if (gcId == (int)Events.assertField(event, "gcId").getValue() &&
  87                     when.equals(Events.assertField(event, "when").getValue())) {
  88                 System.out.printf("Found " + EventNames.GCHeapSummary + " for id=%d, when=%s%n", gcId, when);
  89                 return;
  90             }
  91         }
  92         Asserts.fail(String.format("No " + EventNames.GCHeapSummary + " for id=%d, when=%s", gcId, when));
  93     }
  94 
  95 }