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 }