1 /* 2 * Copyright (c) 2015, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 import java.lang.management.MemoryPoolMXBean; 26 27 import sun.hotspot.WhiteBox; 28 import jdk.test.lib.Asserts; 29 30 /** 31 * @test ValueTypeDensity 32 * @summary Heap density test for ValueTypes 33 * @library /testlibrary /test/lib 34 * @build sun.hotspot.WhiteBox 35 * ValueTypeDensity 36 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 37 * sun.hotspot.WhiteBox$WhiteBoxPermission 38 * @run main/othervm -noverify -Xint -XX:+ValueArrayFlatten -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ValueTypeDensity 39 * @run main/othervm -noverify -Xcomp -XX:+ValueArrayFlatten -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ValueTypeDensity 40 */ 41 42 public class ValueTypeDensity { 43 44 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 45 46 public ValueTypeDensity() { 47 if (!WHITE_BOX.getBooleanVMFlag("ValueArrayFlatten")) { 48 throw new IllegalStateException("ValueArrayFlatten false"); 49 } 50 } 51 52 interface LocalDate { 53 public int getYear(); 54 public short getMonth(); 55 public short getDay(); 56 } 57 58 interface LocalTime { 59 public byte getHour(); 60 public byte getMinute(); 61 public byte getSecond(); 62 public int getNano(); 63 } 64 65 interface LocalDateTime extends LocalDate, LocalTime {} 66 67 static final __ByValue class LocalDateValue implements LocalDate { 68 final int year; 69 final short month; 70 final short day; 71 72 LocalDateValue(int year, short month, short day) { 73 this.year = year; 74 this.month = month; 75 this.day = day; 76 } 77 78 public int getYear() { return year; } 79 public short getMonth() { return month; } 80 public short getDay() { return day; } 81 82 public static LocalDateValue create(int year, short month, short day) { 83 return __Make LocalDateValue(year, month, day); 84 } 85 } 86 87 static final __ByValue class LocalTimeValue implements LocalTime { 88 final byte hour; 89 final byte minute; 90 final byte second; 91 final int nano; 92 93 LocalTimeValue(byte hour, byte minute, byte second, int nano) { 94 this.hour = hour; 95 this.minute = minute; 96 this.second = second; 97 this.nano = nano; 98 } 99 100 public byte getHour() { return hour; } 101 public byte getMinute() { return minute; } 102 public byte getSecond() { return second; } 103 public int getNano() { return nano; } 104 105 public static LocalTimeValue create(byte hour, byte minute, byte second, int nano) { 106 return __Make LocalTimeValue(hour, minute, second, nano); 107 } 108 } 109 110 static final __ByValue class LocalDateTimeValue implements LocalDateTime { 111 final LocalDateValue date; 112 final LocalTimeValue time; 113 114 LocalDateTimeValue(LocalDateValue date, LocalTimeValue time) { 115 this.date = date; 116 this.time = time; 117 } 118 119 public int getYear() { return date.year; } 120 public short getMonth() { return date.month; } 121 public short getDay() { return date.day; } 122 123 public byte getHour() { return time.hour; } 124 public byte getMinute() { return time.minute; } 125 public byte getSecond() { return time.second; } 126 public int getNano() { return time.nano; } 127 128 public static LocalDateTimeValue create(LocalDateValue date, LocalTimeValue time) { 129 return __Make LocalDateTimeValue(date, time); 130 } 131 } 132 133 static final class LocalDateClass implements LocalDate { 134 final int year; 135 final short month; 136 final short day; 137 138 LocalDateClass(int year, short month, short day) { 139 this.year = year; 140 this.month = month; 141 this.day = day; 142 } 143 144 public int getYear() { return year; } 145 public short getMonth() { return month; } 146 public short getDay() { return day; } 147 } 148 149 static final class LocalTimeClass implements LocalTime { 150 final byte hour; 151 final byte minute; 152 final byte second; 153 final int nano; 154 155 LocalTimeClass(byte hour, byte minute, byte second, int nano) { 156 this.hour = hour; 157 this.minute = minute; 158 this.second = second; 159 this.nano = nano; 160 } 161 162 public byte getHour() { return hour; } 163 public byte getMinute() { return minute; } 164 public byte getSecond() { return second; } 165 public int getNano() { return nano; } 166 } 167 168 static final class LocalDateTimeClass implements LocalDateTime { 169 final LocalDateClass date; 170 final LocalTimeClass time; 171 172 LocalDateTimeClass(LocalDateClass date, LocalTimeClass time) { 173 this.date = date; 174 this.time = time; 175 } 176 177 public LocalDateClass getDate() { return date; } 178 public LocalTimeClass getTime() { return time; } 179 180 public int getYear() { return date.year; } 181 public short getMonth() { return date.month; } 182 public short getDay() { return date.day; } 183 184 public byte getHour() { return time.hour; } 185 public byte getMinute() { return time.minute; } 186 public byte getSecond() { return time.second; } 187 public int getNano() { return time.nano; } 188 } 189 190 public void ensureArraySizeWin() { 191 int arrayLength = 1000; 192 System.out.println("ensureArraySizeWin for length " + arrayLength); 193 LocalDateTimeClass[] objectArray = new LocalDateTimeClass[arrayLength]; 194 for (int i = 0; i < arrayLength; i++) { 195 objectArray[i] = new LocalDateTimeClass(new LocalDateClass(0, (short)0, (short)0), 196 new LocalTimeClass((byte)0, (byte)0, (byte)0, 0)); 197 } 198 199 long objectArraySize = WHITE_BOX.getObjectSize(objectArray); 200 System.out.println("Empty object array size: " + objectArraySize); 201 objectArraySize += (arrayLength * 202 (WHITE_BOX.getObjectSize(objectArray[0]) + 203 WHITE_BOX.getObjectSize(objectArray[0].getDate()) + 204 WHITE_BOX.getObjectSize(objectArray[0].getTime()))); 205 206 LocalDateTimeValue[] valueArray = new LocalDateTimeValue[arrayLength]; 207 // CMH: add "isFlatValueArray" to WhiteBox API, to ensure we are correctly account size 208 209 long valueArraySize = WHITE_BOX.getObjectSize(valueArray); 210 System.out.println("Object array and elements: " + objectArraySize + " versus Value Array: " + valueArraySize); 211 Asserts.assertLessThan(valueArraySize, objectArraySize, "Value array accounts for more heap than object array + elements !"); 212 } 213 214 public void test() { 215 ensureArraySizeWin(); 216 } 217 218 public static void main(String[] args) { 219 new ValueTypeDensity().test(); 220 } 221 222 } 223