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