Mercurial > hg > truffle

comparison test/testlibrary/whitebox/sun/hotspot/cpuinfo/CPUInfo.java @ 17778:a48e16541e6b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8035857: Add tests to verify correctness of operations with BMI1 and LZCNT instructions Reviewed-by: iveresov, kvn, iignatyev Contributed-by: filipp.zhinkin@oracle.com
author iignatyev
date Sat, 22 Mar 2014 00:26:48 +0400
parents
children
comparison
equal deleted inserted replaced
17777:460f312abe11 17778:a48e16541e6b
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 package sun.hotspot.cpuinfo;
26
27 import java.util.List;
28 import java.util.ArrayList;
29 import java.util.Arrays;
30 import java.util.Collections;
31 import java.util.regex.Pattern;
32 import java.util.regex.Matcher;
33
34 import sun.hotspot.WhiteBox;
35
36 /**
37 * Information about CPU on test box.
38 *
39 * CPUInfo uses WhiteBox to gather information,
40 * so WhiteBox class should be added to bootclasspath
41 * and option -XX:+WhiteBoxAPI should expclicetly
42 * specified on command line.
43 */
44 public class CPUInfo {
45
46 private static final List<String> features;
47 private static final String additionalCPUInfo;
48
49 static {
50 WhiteBox wb = WhiteBox.getWhiteBox();
51
52 Pattern additionalCPUInfoRE =
53 Pattern.compile("([^(]*\\([^)]*\\)[^,]*),\\s*");
54
55 String cpuFeaturesString = wb.getCPUFeatures();
56 Matcher matcher = additionalCPUInfoRE.matcher(cpuFeaturesString);
57 if (matcher.find()) {
58 additionalCPUInfo = matcher.group(1);
59 } else {
60 additionalCPUInfo = "";
61 }
62 String splittedFeatures[] = matcher.replaceAll("").split("(, )| ");
63
64 features = Collections.unmodifiableList(Arrays.
65 asList(splittedFeatures));
66 }
67
68 /**
69 * Get additional information about CPU.
70 * For example, on X86 in will be family/model/stepping
71 * and number of cores.
72 *
73 * @return additional CPU info
74 */
75 public static String getAdditionalCPUInfo() {
76 return additionalCPUInfo;
77 }
78
79 /**
80 * Get all known features supported by CPU.
81 *
82 * @return unmodifiable list with names of all known features
83 * supported by CPU.
84 */
85 public static List<String> getFeatures() {
86 return features;
87 }
88
89 /**
90 * Check if some feature is supported by CPU.
91 *
92 * @param feature Name of feature to be tested.
93 * @return <b>true</b> if tested feature is supported by CPU.
94 */
95 public static boolean hasFeature(String feature) {
96 return features.contains(feature.toLowerCase());
97 }
98 }