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