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comparison test/runtime/CompressedOops/CompressedClassPointers.java @ 13000:209aa13ab8c0

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8024927: Nashorn performance regression with CompressedOops Summary: Allocate compressed class space at end of Java heap. For small heap sizes, without CDS, save some space so compressed classes can have the same favorable compression as oops Reviewed-by: stefank, hseigel, goetz
author coleenp
date Fri, 25 Oct 2013 15:19:29 -0400
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children de7f1b016d55
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12999:634715d59d9e 13000:209aa13ab8c0
1 /*
2 * Copyright (c) 2013, 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 8024927
27 * @summary Testing address of compressed class pointer space as best as possible.
28 * @library /testlibrary
29 */
30
31 import com.oracle.java.testlibrary.*;
32
33 public class CompressedClassPointers {
34
35 public static void smallHeapTest() throws Exception {
36 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
37 "-XX:+UnlockDiagnosticVMOptions",
38 "-XX:SharedBaseAddress=8g",
39 "-Xmx128m",
40 "-XX:+PrintCompressedOopsMode",
41 "-XX:+VerifyBeforeGC", "-version");
42 OutputAnalyzer output = new OutputAnalyzer(pb.start());
43 output.shouldContain("Narrow klass base: 0x0000000000000000");
44 output.shouldHaveExitValue(0);
45 }
46
47 public static void smallHeapTestWith3G() throws Exception {
48 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
49 "-XX:+UnlockDiagnosticVMOptions",
50 "-XX:CompressedClassSpaceSize=3g",
51 "-Xmx128m",
52 "-XX:+PrintCompressedOopsMode",
53 "-XX:+VerifyBeforeGC", "-version");
54 OutputAnalyzer output = new OutputAnalyzer(pb.start());
55 output.shouldContain("Narrow klass base: 0x0000000000000000, Narrow klass shift: 3");
56 output.shouldHaveExitValue(0);
57 }
58
59 public static void largeHeapTest() throws Exception {
60 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
61 "-XX:+UnlockDiagnosticVMOptions",
62 "-Xmx30g",
63 "-XX:+PrintCompressedOopsMode",
64 "-XX:+VerifyBeforeGC", "-version");
65 OutputAnalyzer output = new OutputAnalyzer(pb.start());
66 output.shouldNotContain("Narrow klass base: 0x0000000000000000");
67 output.shouldContain("Narrow klass shift: 0");
68 output.shouldHaveExitValue(0);
69 }
70
71 public static void largePagesTest() throws Exception {
72 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
73 "-XX:+UnlockDiagnosticVMOptions",
74 "-Xmx128m",
75 "-XX:+UseLargePages",
76 "-XX:+PrintCompressedOopsMode",
77 "-XX:+VerifyBeforeGC", "-version");
78 OutputAnalyzer output = new OutputAnalyzer(pb.start());
79 output.shouldContain("Narrow klass base:");
80 output.shouldHaveExitValue(0);
81 }
82
83 public static void sharingTest() throws Exception {
84 // Test small heaps
85 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
86 "-XX:+UnlockDiagnosticVMOptions",
87 "-XX:SharedArchiveFile=./sample.jsa",
88 "-Xmx128m",
89 "-XX:SharedBaseAddress=8g",
90 "-XX:+PrintCompressedOopsMode",
91 "-XX:+VerifyBeforeGC",
92 "-Xshare:dump");
93 OutputAnalyzer output = new OutputAnalyzer(pb.start());
94 try {
95 output.shouldContain("Loading classes to share");
96 output.shouldHaveExitValue(0);
97
98 pb = ProcessTools.createJavaProcessBuilder(
99 "-XX:+UnlockDiagnosticVMOptions",
100 "-XX:SharedArchiveFile=./sample.jsa",
101 "-Xmx128m",
102 "-XX:SharedBaseAddress=8g",
103 "-XX:+PrintCompressedOopsMode",
104 "-Xshare:on",
105 "-version");
106 output = new OutputAnalyzer(pb.start());
107 output.shouldContain("sharing");
108 output.shouldHaveExitValue(0);
109
110 } catch (RuntimeException e) {
111 output.shouldContain("Unable to use shared archive");
112 output.shouldHaveExitValue(1);
113 }
114 }
115
116 public static void main(String[] args) throws Exception {
117 if (!Platform.is64bit()) {
118 // Can't test this on 32 bit, just pass
119 System.out.println("Skipping test on 32bit");
120 return;
121 }
122 // Solaris 10 can't mmap compressed oops space without a base
123 if (Platform.isSolaris()) {
124 String name = System.getProperty("os.version");
125 if (name.equals("5.10")) {
126 System.out.println("Skipping test on Solaris 10");
127 return;
128 }
129 }
130 smallHeapTest();
131 smallHeapTestWith3G();
132 largeHeapTest();
133 largePagesTest();
134 sharingTest();
135 }
136 }