1 /*
2 * Copyright (c) 2014, 2016, 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 * @test
26 * @bug 8022865
27 * @summary Tests for different combination of UseCompressedOops options
28 * @library /testlibrary
29 * @ignore 8079353
30 * @modules java.base/jdk.internal.misc
31 * java.management
32 * @run main UseCompressedOops
33 */
34 import java.util.ArrayList;
35 import java.util.Collections;
36 import jdk.test.lib.*;
37
38 public class UseCompressedOops {
39
40 public static void main(String[] args) throws Exception {
41 testCompressedOopsModesGCs();
42 testCompressedOopsModesGCs("-XX:+UseLargePages");
43 }
44
45 public static void testCompressedOopsModesGCs(String... flags) throws Exception {
46 ArrayList<String> args = new ArrayList<>();
47 Collections.addAll(args, flags);
48
49 // Test default.
50 testCompressedOopsModes(args);
51 // Test GCs.
52 testCompressedOopsModes(args, "-XX:+UseG1GC");
53 testCompressedOopsModes(args, "-XX:+UseConcMarkSweepGC");
54 testCompressedOopsModes(args, "-XX:+UseSerialGC");
55 testCompressedOopsModes(args, "-XX:+UseParallelGC");
56 testCompressedOopsModes(args, "-XX:+UseParallelOldGC");
57 }
58
59 public static void testCompressedOopsModes(ArrayList<String> flags1, String... flags2) throws Exception {
60 ArrayList<String> args = new ArrayList<>();
61 args.addAll(flags1);
62 Collections.addAll(args, flags2);
63
64 if (Platform.is64bit()) {
65 // Explicitly turn of compressed oops
66 testCompressedOops(args, "-XX:-UseCompressedOops", "-Xmx32m")
67 .shouldNotContain("Compressed Oops")
68 .shouldHaveExitValue(0);
69
70 // Compressed oops should be on by default
71 testCompressedOops(args, "-Xmx32m")
72 .shouldContain("Compressed Oops mode")
73 .shouldHaveExitValue(0);
74
75 // Explicly enabling compressed oops
76 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m")
77 .shouldContain("Compressed Oops mode")
78 .shouldHaveExitValue(0);
79
80 // Skip the following three test cases if we're on OSX or Solaris.
81 //
82 // OSX doesn't seem to care about HeapBaseMinAddress and Solaris
83 // puts the heap way up, forcing different behaviour.
84 if (!Platform.isOSX() && !Platform.isSolaris()) {
85 // Larger than 4gb heap should result in zero based with shift 3
86 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx5g")
87 .shouldContain("Zero based")
88 .shouldContain("Oop shift amount: 3")
89 .shouldHaveExitValue(0);
90
91 // Larger than 3gb heap and HeapBaseMinAddress=1g should result in zero based with shift 3
92 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx3200m", "-XX:HeapBaseMinAddress=1g")
93 .shouldContain("Zero based")
94 .shouldContain("Oop shift amount: 3")
95 .shouldHaveExitValue(0);
96
97 // Small heap above 4gb should result in zero based with shift 3
98 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=4g")
99 .shouldContain("Zero based")
100 .shouldContain("Oop shift amount: 3")
101 .shouldHaveExitValue(0);
102
103 // Small heap above 32gb should result in non-zero based with shift 3
104 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=32g")
105 .shouldContain("Non-zero disjoint base")
106 .shouldContain("Oop shift amount: 3")
107 .shouldHaveExitValue(0);
108
109 // Small heap above 32gb should result in non-zero based with shift 3
110 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=72704m")
111 .shouldContain("Non-zero based")
112 .shouldContain("Oop shift amount: 3")
113 .shouldHaveExitValue(0);
114
115 // 32gb heap with heap base above 64gb and object alignment set to 16 bytes should result
116 // in non-zero based with shift 4
117 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16",
118 "-XX:HeapBaseMinAddress=64g")
119 .shouldContain("Non-zero disjoint base")
120 .shouldContain("Oop shift amount: 4")
121 .shouldHaveExitValue(0);
122
123 // 32gb heap with object alignment set to 16 bytes should result in zero based with shift 4
124 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16")
125 .shouldContain("Zero based")
126 .shouldContain("Oop shift amount: 4")
127 .shouldHaveExitValue(0);
128 }
129
130 // This is a pathologic case for the heap allocation algorithm. Regression test.
131 // HeapBaseMinAddress must be 2g and should not be set on the command line.
132 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx2g")
133 .shouldNotContain("Max heap size too large for Compressed Oops")
134 .shouldHaveExitValue(0);
135 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx29g", "-XX:CompressedClassSpaceSize=1g")
136 .shouldNotContain("Max heap size too large for Compressed Oops")
137 .shouldHaveExitValue(0);
138
139 // Explicitly enabling compressed oops with 32gb heap should result a warning
140 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g")
141 .shouldContain("Max heap size too large for Compressed Oops")
142 .shouldHaveExitValue(0);
143
144 // 32gb heap should not result a warning
145 testCompressedOops(args, "-Xmx32g")
146 .shouldNotContain("Max heap size too large for Compressed Oops")
147 .shouldHaveExitValue(0);
148
149 // Explicitly enabling compressed oops with 32gb heap and object
150 // alignment set to 8 byte should result a warning
151 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=8")
152 .shouldContain("Max heap size too large for Compressed Oops")
153 .shouldHaveExitValue(0);
154
155 // 64gb heap and object alignment set to 16 bytes should result in a warning
156 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx64g", "-XX:ObjectAlignmentInBytes=16")
157 .shouldContain("Max heap size too large for Compressed Oops")
158 .shouldHaveExitValue(0);
159
160 } else {
161 // Compressed oops should only apply to 64bit platforms
162 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m")
163 .shouldContain("Unrecognized VM option 'UseCompressedOops'")
164 .shouldHaveExitValue(1);
165 }
166 }
167
168 private static OutputAnalyzer testCompressedOops(ArrayList<String> flags1, String... flags2) throws Exception {
169 ArrayList<String> args = new ArrayList<>();
170
171 // Always run with these three:
172 args.add("-XX:+PrintCompressedOopsMode");
173 args.add("-Xms32m");
174
175 // Add the extra flags
176 args.addAll(flags1);
177 Collections.addAll(args, flags2);
178
179 args.add("-version");
180
181 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0]));
182 return new OutputAnalyzer(pb.start());
183 }
184 }