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