1 /*
   2  * Copyright (c) 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.jvm;
  27 
  28 import java.io.IOException;
  29 import java.time.Duration;
  30 import java.util.ArrayList;
  31 import java.util.Collections;
  32 import java.util.HashMap;
  33 import java.util.List;
  34 import java.util.Map;
  35 
  36 import jdk.jfr.Event;
  37 import jdk.jfr.EventFactory;
  38 import jdk.jfr.Recording;
  39 import jdk.jfr.ValueDescriptor;
  40 import jdk.jfr.consumer.RecordedEvent;
  41 import jdk.test.lib.Asserts;
  42 import jdk.test.lib.jfr.EventTypePrototype;
  43 import jdk.test.lib.jfr.Events;
  44 import jdk.test.lib.jfr.Stressor;
  45 
  46 /**
  47  * @test TestLargeJavaEvent64k
  48  * @key jfr
  49  * @requires vm.hasJFR
  50  * @library /test/lib
  51  * @modules jdk.jfr/jdk.jfr.internal
  52  *    java.base/jdk.internal.org.objectweb.asm
  53  * @run main/othervm jdk.jfr.jvm.TestLargeJavaEvent64k
  54  */
  55 public class TestLargeJavaEvent64k {
  56     static boolean error;
  57     static void setError() {
  58         error = true;
  59     }
  60     static boolean hasError() {
  61         return error;
  62     }
  63 
  64     public static void main(String... args) throws Exception {
  65         final String name = "MyLargeJavaEvent64k"; // name of synthetically generated event
  66         final String fieldNamePrefix = "myfield";
  67         final int numberOfFields = 8; // 8*8k = ~64k event size
  68         final Map<String, Object> eventMap = new HashMap<>();
  69         final int numberOfThreads = 100; // 50 threads will run the test
  70         final int numberOfEventsPerThread = 50; // each thread will generate 50 events
  71 
  72         List<ValueDescriptor> fields = new ArrayList<>();
  73         for (int i = 0; i < numberOfFields; ++i) {
  74             String fieldName = fieldNamePrefix + i;
  75             eventMap.put(fieldName, largeString());
  76             fields.add(new ValueDescriptor(String.class, fieldName));
  77         }
  78 
  79         EventTypePrototype prototype = new EventTypePrototype(name,Collections.emptyList(),  fields);
  80 
  81         EventFactory ef = EventFactory.create(prototype.getAnnotations(), prototype.getFields());
  82 
  83         Recording r = new Recording();
  84         r.enable(prototype.getName()).withThreshold(Duration.ofNanos(0)).withoutStackTrace();
  85         r.start();
  86 
  87         Thread.UncaughtExceptionHandler eh = (t, e) -> TestLargeJavaEvent64k.setError();
  88 
  89         Stressor.execute(numberOfThreads, eh, () -> {
  90             for (int n = 0; n < numberOfEventsPerThread; ++n) {
  91                 try {
  92                     Event event = ef.newEvent();
  93                     setEventValues(event, ef, prototype, eventMap);
  94                     event.commit();
  95                     Thread.sleep(1);
  96                 } catch (Exception ex) {
  97                     throw new RuntimeException(ex);
  98                 }
  99             }
 100         });
 101         r.stop();
 102         try {
 103             if (hasError()) {
 104                 throw new RuntimeException("One (or several) of the threads had an exception/error, test failed");
 105             }
 106             verifyEvents(r, numberOfThreads, numberOfEventsPerThread, eventMap);
 107         } finally {
 108             r.close();
 109         }
 110     }
 111 
 112     private static void verifyEvents(Recording r, int numberOfThreads, int iterations, Map<String, Object> fields) throws IOException {
 113         List<RecordedEvent> recordedEvents = Events.fromRecording(r);
 114         Events.hasEvents(recordedEvents);
 115         int eventCount = 0;
 116         for (RecordedEvent re : recordedEvents) {
 117             verify(re, fields);
 118             eventCount++;
 119         }
 120         System.out.println("Number of expected events: " + numberOfThreads * iterations);
 121         System.out.println("Number of events found: " + eventCount);
 122         Asserts.assertEquals(numberOfThreads * iterations, eventCount, "Unexpected number of events");
 123     }
 124 
 125     // each row is 64 chars for 128 rows == 8192 chars
 126     private static String largeString() {
 127         StringBuilder builder = new StringBuilder();
 128         for (int i = 0; i < 128; ++i) {
 129             builder.append("cygwinapacygwinapacygwinapacygwinapacygwinapacygwinapacygwinapa ");
 130         }
 131         return builder.toString();
 132     }
 133 
 134     private static void setEventValues(Event event, EventFactory f, EventTypePrototype prototype, Map<String, Object> fields) {
 135         for (Map.Entry<String, Object> entry : fields.entrySet()) {
 136             int index = prototype.getFieldIndex(entry.getKey());
 137             event.set(index, entry.getValue());
 138         }
 139     }
 140 
 141     private static void verify(RecordedEvent event, Map<String, Object> fields) {
 142         for (Map.Entry<String, Object> entry : fields.entrySet()) {
 143             String fieldName = entry.getKey();
 144             Object value = event.getValue(fieldName);
 145             Object expected = fields.get(fieldName);
 146             Asserts.assertEQ(value, expected);
 147         }
 148     }
 149 }