1 /*
2 * Copyright (c) 2017, 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 /test/lib
34 * @compile -XDenableValueTypes ValueTypeDensity.java
35 * @run main ClassFileInstaller sun.hotspot.WhiteBox
36 * @run main/othervm -Xint -XX:+EnableValhalla -XX:+ValueArrayFlatten
37 * -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
38 * -XX:+WhiteBoxAPI ValueTypeDensity
39 */
40
41
42 /*
43 * @run main/othervm -Xcomp -XX:+EnableValhalla -XX:+ValueArrayFlatten
44 * -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
45 * -XX:+WhiteBoxAPI ValueTypeDensity
46 */
47
48 public class ValueTypeDensity {
49
50 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
51
52 public ValueTypeDensity() {
53 if (!WHITE_BOX.getBooleanVMFlag("ValueArrayFlatten")) {
54 throw new IllegalStateException("ValueArrayFlatten false");
55 }
56 }
57
58 interface LocalDate {
59 public int getYear();
60 public short getMonth();
61 public short getDay();
62 }
63
64 interface LocalTime {
65 public byte getHour();
66 public byte getMinute();
67 public byte getSecond();
68 public int getNano();
69 }
70
71 interface LocalDateTime extends LocalDate, LocalTime {}
72
73 static final __ByValue class LocalDateValue implements LocalDate {
74 final int year;
75 final short month;
76 final short day;
77
78 LocalDateValue() {
79 this.year = 0;
80 this.month = 0;
81 this.day = 0;
82 }
83
84 public int getYear() { return year; }
85 public short getMonth() { return month; }
86 public short getDay() { return day; }
87
88 __ValueFactory public static LocalDateValue create(int year, short month, short day) {
89 LocalDateValue localDate = __MakeDefault LocalDateValue();
90 localDate.year = year;
91 localDate.month = month;
92 localDate.day = day;
93 return localDate;
94 }
95 }
96
97 static final __ByValue class LocalTimeValue implements LocalTime {
98 final byte hour;
99 final byte minute;
100 final byte second;
101 final int nano;
102
103 LocalTimeValue() {
104 this.hour = 0;
105 this.minute = 0;
106 this.second = 0;
107 this.nano = 0;
108 }
109
110 public byte getHour() { return hour; }
111 public byte getMinute() { return minute; }
112 public byte getSecond() { return second; }
113 public int getNano() { return nano; }
114
115 __ValueFactory public static LocalTimeValue create(byte hour, byte minute, byte second, int nano) {
116 LocalTimeValue localTime = __MakeDefault LocalTimeValue();
117 localTime.hour = hour;
118 localTime.minute = minute;
119 localTime.second = second;
120 localTime.nano = nano;
121 return localTime;
122 }
123 }
124
125 static final __ByValue class LocalDateTimeValue implements LocalDateTime {
126 final LocalDateValue date;
127 final LocalTimeValue time;
128
129 LocalDateTimeValue() {
130 // Well this is a little weird...
131 date = LocalDateValue.create(0, (short)0, (short)0);
132 time = LocalTimeValue.create((byte)0, (byte)0, (byte)0, 0);
133 }
134
135 public int getYear() { return date.year; }
136 public short getMonth() { return date.month; }
137 public short getDay() { return date.day; }
138
139 public byte getHour() { return time.hour; }
140 public byte getMinute() { return time.minute; }
141 public byte getSecond() { return time.second; }
142 public int getNano() { return time.nano; }
143
144 __ValueFactory public static LocalDateTimeValue create(LocalDateValue date, LocalTimeValue time) {
145 LocalDateTimeValue localDateTime = __MakeDefault LocalDateTimeValue();
146 localDateTime.date = date;
147 localDateTime.time = time;
148 return localDateTime;
149 }
150 }
151
152 static final class LocalDateClass implements LocalDate {
153 final int year;
154 final short month;
155 final short day;
156
157 LocalDateClass(int year, short month, short day) {
158 this.year = year;
159 this.month = month;
160 this.day = day;
161 }
162
163 public int getYear() { return year; }
164 public short getMonth() { return month; }
165 public short getDay() { return day; }
166 }
167
168 static final class LocalTimeClass implements LocalTime {
169 final byte hour;
170 final byte minute;
171 final byte second;
172 final int nano;
173
174 LocalTimeClass(byte hour, byte minute, byte second, int nano) {
175 this.hour = hour;
176 this.minute = minute;
177 this.second = second;
178 this.nano = nano;
179 }
180
181 public byte getHour() { return hour; }
182 public byte getMinute() { return minute; }
183 public byte getSecond() { return second; }
184 public int getNano() { return nano; }
185 }
186
187 static final class LocalDateTimeClass implements LocalDateTime {
188 final LocalDateClass date;
189 final LocalTimeClass time;
190
191 LocalDateTimeClass(LocalDateClass date, LocalTimeClass time) {
192 this.date = date;
193 this.time = time;
194 }
195
196 public LocalDateClass getDate() { return date; }
197 public LocalTimeClass getTime() { return time; }
198
199 public int getYear() { return date.year; }
200 public short getMonth() { return date.month; }
201 public short getDay() { return date.day; }
202
203 public byte getHour() { return time.hour; }
204 public byte getMinute() { return time.minute; }
205 public byte getSecond() { return time.second; }
206 public int getNano() { return time.nano; }
207 }
208
209 public void ensureArraySizeWin() {
210 int arrayLength = 1000;
211 System.out.println("ensureArraySizeWin for length " + arrayLength);
212 LocalDateTimeClass[] objectArray = new LocalDateTimeClass[arrayLength];
213 for (int i = 0; i < arrayLength; i++) {
214 objectArray[i] = new LocalDateTimeClass(new LocalDateClass(0, (short)0, (short)0),
215 new LocalTimeClass((byte)0, (byte)0, (byte)0, 0));
216 }
217
218 long objectArraySize = WHITE_BOX.getObjectSize(objectArray);
219 System.out.println("Empty object array size: " + objectArraySize);
220 objectArraySize += (arrayLength *
221 (WHITE_BOX.getObjectSize(objectArray[0]) +
222 WHITE_BOX.getObjectSize(objectArray[0].getDate()) +
223 WHITE_BOX.getObjectSize(objectArray[0].getTime())));
224
225 LocalDateTimeValue[] valueArray = new LocalDateTimeValue[arrayLength];
226 // CMH: add "isFlatValueArray" to WhiteBox API, to ensure we are correctly account size
227
228 long valueArraySize = WHITE_BOX.getObjectSize(valueArray);
229 System.out.println("Object array and elements: " + objectArraySize + " versus Value Array: " + valueArraySize);
230 Asserts.assertLessThan(valueArraySize, objectArraySize, "Value array accounts for more heap than object array + elements !");
231 }
232
233 public void test() {
234 ensureArraySizeWin();
235 }
236
237 public static void main(String[] args) {
238 new ValueTypeDensity().test();
239 }
240
241 }
242