1 /* 2 * Copyright (c) 2013, 2019, 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.compiler; 27 28 import static java.lang.Math.floor; 29 import static jdk.testlibrary.Asserts.assertGreaterThanOrEqual; 30 import static jdk.testlibrary.Asserts.assertLessThanOrEqual; 31 32 import java.time.Duration; 33 34 import jdk.jfr.Recording; 35 import jdk.jfr.consumer.RecordedEvent; 36 import jdk.testlibrary.jfr.EventNames; 37 import jdk.testlibrary.jfr.Events; 38 39 /* 40 * @test 41 * @summary Test that when an object is allocated outside a TLAB an event will be triggered. 42 * @key jfr 43 * @library /lib/testlibrary 44 * @run main/othervm -XX:+UseTLAB -XX:-FastTLABRefill -XX:TLABSize=90k -XX:-ResizeTLAB -XX:TLABRefillWasteFraction=256 jdk.jfr.event.compiler.TestAllocOutsideTLAB 45 * @run main/othervm -XX:+UseTLAB -XX:-FastTLABRefill -XX:TLABSize=90k -XX:-ResizeTLAB -XX:TLABRefillWasteFraction=256 jdk.jfr.event.compiler.TestAllocOutsideTLAB 46 * @run main/othervm -XX:+UseTLAB -XX:-FastTLABRefill -XX:TLABSize=90k -XX:-ResizeTLAB -XX:TLABRefillWasteFraction=256 -Xint jdk.jfr.event.compiler.TestAllocOutsideTLAB 47 */ 48 49 /** 50 * Test that an event is triggered when an object is allocated outside a 51 * Thread Local Allocation Buffer (TLAB). The test is done for C1-compiler, 52 * C2-compiler (-XX:-FastTLABRefill) and interpreted mode (-Xint). 53 * 54 * To force objects to be allocated outside TLAB: 55 * the size of TLAB is set to 90k (-XX:TLABSize=90k); 56 * the size of allocated objects is set to 100k. 57 * max TLAB waste at refill is set to 256 (-XX:TLABRefillWasteFraction=256), 58 * to prevent a new TLAB creation. 59 */ 60 public class TestAllocOutsideTLAB { 61 private static final String EVENT_NAME = EventNames.ObjectAllocationOutsideTLAB; 62 63 private static final int BYTE_ARRAY_OVERHEAD = 16; // Extra bytes used by a byte array 64 private static final int OBJECT_SIZE = 100 * 1024; 65 private static final int OBJECT_SIZE_ALT = OBJECT_SIZE + 8; // Object size in case of disabled CompressedOops 66 private static final int OBJECTS_TO_ALLOCATE = 100; 67 private static final String BYTE_ARRAY_CLASS_NAME = new byte[0].getClass().getName(); 68 69 public static byte[] tmp; // Used to prevent optimizer from removing code. 70 71 public static void main(String[] args) throws Exception { 72 Recording recording = new Recording(); 73 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0)); 74 recording.start(); 75 for (int i = 0; i < OBJECTS_TO_ALLOCATE; ++i) { 76 tmp = new byte[OBJECT_SIZE - BYTE_ARRAY_OVERHEAD]; 77 } 78 recording.stop(); 79 80 int countEvents = 0; 81 for (RecordedEvent event : Events.fromRecording(recording)) { 82 if (!EVENT_NAME.equals(event.getEventType().getName())) { 83 continue; 84 } 85 System.out.println("Event:" + event); 86 87 long allocationSize = Events.assertField(event, "allocationSize").atLeast(1L).getValue(); 88 String className = Events.assertField(event, "objectClass.name").notEmpty().getValue(); 89 90 boolean isMyEvent = Thread.currentThread().getId() == event.getThread().getJavaThreadId() 91 && className.equals(BYTE_ARRAY_CLASS_NAME) 92 && (allocationSize == OBJECT_SIZE || allocationSize == OBJECT_SIZE_ALT); 93 if (isMyEvent) { 94 ++countEvents; 95 } 96 } 97 98 int minCount = (int) floor(OBJECTS_TO_ALLOCATE * 0.80); 99 assertGreaterThanOrEqual(countEvents, minCount, "Too few tlab objects allocated"); 100 assertLessThanOrEqual(countEvents, OBJECTS_TO_ALLOCATE, "Too many tlab objects allocated"); 101 } 102 103 }