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.compiler; 27 28 import static java.lang.Math.floor; 29 import static jdk.test.lib.Asserts.assertGreaterThanOrEqual; 30 import static jdk.test.lib.Asserts.assertLessThanOrEqual; 31 32 import java.time.Duration; 33 34 import jdk.jfr.Recording; 35 import jdk.jfr.consumer.RecordedEvent; 36 import jdk.test.lib.jfr.EventNames; 37 import jdk.test.lib.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 * 44 * @library /lib / 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 jdk.jfr.event.compiler.TestAllocOutsideTLAB 47 * @run main/othervm -XX:+UseTLAB -XX:-FastTLABRefill -XX:TLABSize=90k -XX:-ResizeTLAB -XX:TLABRefillWasteFraction=256 -Xint jdk.jfr.event.compiler.TestAllocOutsideTLAB 48 */ 49 50 /** 51 * Test that an event is triggered when an object is allocated outside a 52 * Thread Local Allocation Buffer (TLAB). The test is done for C1-compiler, 53 * C2-compiler (-XX:-FastTLABRefill) and interpreted mode (-Xint). 54 * 55 * To force objects to be allocated outside TLAB: 56 * the size of TLAB is set to 90k (-XX:TLABSize=90k); 57 * the size of allocated objects is set to 100k. 58 * max TLAB waste at refill is set to 256 (-XX:TLABRefillWasteFraction=256), 59 * to prevent a new TLAB creation. 60 */ 61 public class TestAllocOutsideTLAB { 62 private static final String EVENT_NAME = EventNames.ObjectAllocationOutsideTLAB; 63 64 private static final int BYTE_ARRAY_OVERHEAD = 16; // Extra bytes used by a byte array 65 private static final int OBJECT_SIZE = 100 * 1024; 66 private static final int OBJECT_SIZE_ALT = OBJECT_SIZE + 8; // Object size in case of disabled CompressedOops 67 private static final int OBJECTS_TO_ALLOCATE = 100; 68 private static final String BYTE_ARRAY_CLASS_NAME = new byte[0].getClass().getName(); 69 70 public static byte[] tmp; // Used to prevent optimizer from removing code. 71 72 public static void main(String[] args) throws Exception { 73 Recording recording = new Recording(); 74 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0)); 75 recording.start(); 76 for (int i = 0; i < OBJECTS_TO_ALLOCATE; ++i) { 77 tmp = new byte[OBJECT_SIZE - BYTE_ARRAY_OVERHEAD]; 78 } 79 recording.stop(); 80 81 int countEvents = 0; 82 for (RecordedEvent event : Events.fromRecording(recording)) { 83 if (!EVENT_NAME.equals(event.getEventType().getName())) { 84 continue; 85 } 86 System.out.println("Event:" + event); 87 88 long allocationSize = Events.assertField(event, "allocationSize").atLeast(1L).getValue(); 89 String className = Events.assertField(event, "objectClass.name").notEmpty().getValue(); 90 91 boolean isMyEvent = Thread.currentThread().getId() == event.getThread().getJavaThreadId() 92 && className.equals(BYTE_ARRAY_CLASS_NAME) 93 && (allocationSize == OBJECT_SIZE || allocationSize == OBJECT_SIZE_ALT); 94 if (isMyEvent) { 95 ++countEvents; 96 } 97 } 98 99 int minCount = (int) floor(OBJECTS_TO_ALLOCATE * 0.80); 100 assertGreaterThanOrEqual(countEvents, minCount, "Too few tlab objects allocated"); 101 assertLessThanOrEqual(countEvents, OBJECTS_TO_ALLOCATE, "Too many tlab objects allocated"); 102 } 103 104 }