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 /test/lib
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.Platform;
37 import jdk.test.lib.process.ProcessTools;
38 import jdk.test.lib.process.OutputAnalyzer;
39
40 public class UseCompressedOops {
41
42 public static void main(String[] args) throws Exception {
43 testCompressedOopsModesGCs();
44 testCompressedOopsModesGCs("-XX:+UseLargePages");
45 }
46
47 public static void testCompressedOopsModesGCs(String... flags) throws Exception {
48 ArrayList<String> args = new ArrayList<>();
49 Collections.addAll(args, flags);
50
51 // Test default.
52 testCompressedOopsModes(args);
53 // Test GCs.
54 testCompressedOopsModes(args, "-XX:+UseG1GC");
55 testCompressedOopsModes(args, "-XX:+UseConcMarkSweepGC");
56 testCompressedOopsModes(args, "-XX:+UseSerialGC");
57 testCompressedOopsModes(args, "-XX:+UseParallelGC");
58 testCompressedOopsModes(args, "-XX:+UseParallelOldGC");
59 }
60
61 public static void testCompressedOopsModes(ArrayList<String> flags1, String... flags2) throws Exception {
62 ArrayList<String> args = new ArrayList<>();
63 args.addAll(flags1);
64 Collections.addAll(args, flags2);
65
66 if (Platform.is64bit()) {
67 // Explicitly turn of compressed oops
68 testCompressedOops(args, "-XX:-UseCompressedOops", "-Xmx32m")
69 .shouldNotContain("Compressed Oops")
70 .shouldHaveExitValue(0);
71
72 // Compressed oops should be on by default
73 testCompressedOops(args, "-Xmx32m")
74 .shouldContain("Compressed Oops mode")
75 .shouldHaveExitValue(0);
76
77 // Explicly enabling compressed oops
78 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m")
79 .shouldContain("Compressed Oops mode")
80 .shouldHaveExitValue(0);
81
82 // Skip the following three test cases if we're on OSX or Solaris.
83 //
84 // OSX doesn't seem to care about HeapBaseMinAddress and Solaris
85 // puts the heap way up, forcing different behaviour.
86 if (!Platform.isOSX() && !Platform.isSolaris()) {
87 // Larger than 4gb heap should result in zero based with shift 3
88 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx5g")
89 .shouldContain("Zero based")
90 .shouldContain("Oop shift amount: 3")
91 .shouldHaveExitValue(0);
92
93 // Larger than 3gb heap and HeapBaseMinAddress=1g should result in zero based with shift 3
94 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx3200m", "-XX:HeapBaseMinAddress=1g")
95 .shouldContain("Zero based")
96 .shouldContain("Oop shift amount: 3")
97 .shouldHaveExitValue(0);
98
99 // Small heap above 4gb should result in zero based with shift 3
100 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=4g")
101 .shouldContain("Zero based")
102 .shouldContain("Oop shift amount: 3")
103 .shouldHaveExitValue(0);
104
105 // Small heap above 32gb should result in non-zero based with shift 3
106 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=32g")
107 .shouldContain("Non-zero disjoint base")
108 .shouldContain("Oop shift amount: 3")
109 .shouldHaveExitValue(0);
110
111 // Small heap above 32gb should result in non-zero based with shift 3
112 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=72704m")
113 .shouldContain("Non-zero based")
114 .shouldContain("Oop shift amount: 3")
115 .shouldHaveExitValue(0);
116
117 // 32gb heap with heap base above 64gb and object alignment set to 16 bytes should result
118 // in non-zero based with shift 4
119 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16",
120 "-XX:HeapBaseMinAddress=64g")
121 .shouldContain("Non-zero disjoint base")
122 .shouldContain("Oop shift amount: 4")
123 .shouldHaveExitValue(0);
124
125 // 32gb heap with object alignment set to 16 bytes should result in zero based with shift 4
126 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16")
127 .shouldContain("Zero based")
128 .shouldContain("Oop shift amount: 4")
129 .shouldHaveExitValue(0);
130 }
131
132 // This is a pathologic case for the heap allocation algorithm. Regression test.
133 // HeapBaseMinAddress must be 2g and should not be set on the command line.
134 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx2g")
135 .shouldNotContain("Max heap size too large for Compressed Oops")
136 .shouldHaveExitValue(0);
137 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx29g", "-XX:CompressedClassSpaceSize=1g")
138 .shouldNotContain("Max heap size too large for Compressed Oops")
139 .shouldHaveExitValue(0);
140
141 // Explicitly enabling compressed oops with 32gb heap should result a warning
142 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g")
143 .shouldContain("Max heap size too large for Compressed Oops")
144 .shouldHaveExitValue(0);
145
146 // 32gb heap should not result a warning
147 testCompressedOops(args, "-Xmx32g")
148 .shouldNotContain("Max heap size too large for Compressed Oops")
149 .shouldHaveExitValue(0);
150
151 // Explicitly enabling compressed oops with 32gb heap and object
152 // alignment set to 8 byte should result a warning
153 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=8")
154 .shouldContain("Max heap size too large for Compressed Oops")
155 .shouldHaveExitValue(0);
156
157 // 64gb heap and object alignment set to 16 bytes should result in a warning
158 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx64g", "-XX:ObjectAlignmentInBytes=16")
159 .shouldContain("Max heap size too large for Compressed Oops")
160 .shouldHaveExitValue(0);
161
162 } else {
163 // Compressed oops should only apply to 64bit platforms
164 testCompressedOops(args, "-XX:+UseCompressedOops", "-Xmx32m")
165 .shouldContain("Unrecognized VM option 'UseCompressedOops'")
166 .shouldHaveExitValue(1);
167 }
168 }
169
170 private static OutputAnalyzer testCompressedOops(ArrayList<String> flags1, String... flags2) throws Exception {
171 ArrayList<String> args = new ArrayList<>();
172
173 // Always run with these three:
174 args.add("-XX:+PrintCompressedOopsMode");
175 args.add("-Xms32m");
176
177 // Add the extra flags
178 args.addAll(flags1);
179 Collections.addAll(args, flags2);
180
181 args.add("-version");
182
183 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0]));
184 return new OutputAnalyzer(pb.start());
185 }
186 }