Mercurial > hg > truffle
annotate test/testlibrary/whitebox/sun/hotspot/cpuinfo/CPUInfo.java @ 17964:660b3f6bf7d7
8042310: TestStringDeduplicationMemoryUsage test failing
Reviewed-by: ehelin, jwilhelm
author | pliden |
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date | Fri, 30 May 2014 10:43:51 +0200 |
parents | a48e16541e6b |
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1 /* |
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 package sun.hotspot.cpuinfo; |
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26 |
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27 import java.util.List; |
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28 import java.util.ArrayList; |
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29 import java.util.Arrays; |
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30 import java.util.Collections; |
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31 import java.util.regex.Pattern; |
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32 import java.util.regex.Matcher; |
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33 |
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34 import sun.hotspot.WhiteBox; |
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35 |
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36 /** |
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37 * Information about CPU on test box. |
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38 * |
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39 * CPUInfo uses WhiteBox to gather information, |
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40 * so WhiteBox class should be added to bootclasspath |
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41 * and option -XX:+WhiteBoxAPI should expclicetly |
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42 * specified on command line. |
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43 */ |
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44 public class CPUInfo { |
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45 |
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46 private static final List<String> features; |
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47 private static final String additionalCPUInfo; |
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48 |
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49 static { |
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50 WhiteBox wb = WhiteBox.getWhiteBox(); |
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51 |
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52 Pattern additionalCPUInfoRE = |
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53 Pattern.compile("([^(]*\\([^)]*\\)[^,]*),\\s*"); |
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54 |
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55 String cpuFeaturesString = wb.getCPUFeatures(); |
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56 Matcher matcher = additionalCPUInfoRE.matcher(cpuFeaturesString); |
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57 if (matcher.find()) { |
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58 additionalCPUInfo = matcher.group(1); |
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59 } else { |
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60 additionalCPUInfo = ""; |
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61 } |
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62 String splittedFeatures[] = matcher.replaceAll("").split("(, )| "); |
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63 |
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64 features = Collections.unmodifiableList(Arrays. |
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65 asList(splittedFeatures)); |
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66 } |
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67 |
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68 /** |
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69 * Get additional information about CPU. |
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70 * For example, on X86 in will be family/model/stepping |
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71 * and number of cores. |
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72 * |
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73 * @return additional CPU info |
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74 */ |
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75 public static String getAdditionalCPUInfo() { |
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76 return additionalCPUInfo; |
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77 } |
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78 |
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79 /** |
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80 * Get all known features supported by CPU. |
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81 * |
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82 * @return unmodifiable list with names of all known features |
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83 * supported by CPU. |
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84 */ |
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85 public static List<String> getFeatures() { |
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86 return features; |
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87 } |
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88 |
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89 /** |
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90 * Check if some feature is supported by CPU. |
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91 * |
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92 * @param feature Name of feature to be tested. |
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93 * @return <b>true</b> if tested feature is supported by CPU. |
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94 */ |
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95 public static boolean hasFeature(String feature) { |
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96 return features.contains(feature.toLowerCase()); |
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97 } |
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98 } |