| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.hotspot.cpuinfo; |
| |
| import java.util.List; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.regex.Pattern; |
| import java.util.regex.Matcher; |
| |
| import sun.hotspot.WhiteBox; |
| |
| /** |
| * Information about CPU on test box. |
| * |
| * CPUInfo uses WhiteBox to gather information, |
| * so WhiteBox class should be added to bootclasspath |
| * and option -XX:+WhiteBoxAPI should expclicetly |
| * specified on command line. |
| */ |
| public class CPUInfo { |
| |
| private static final List<String> features; |
| private static final String additionalCPUInfo; |
| |
| static { |
| WhiteBox wb = WhiteBox.getWhiteBox(); |
| |
| Pattern additionalCPUInfoRE = |
| Pattern.compile("([^(]*\\([^)]*\\)[^,]*),\\s*"); |
| |
| String cpuFeaturesString = wb.getCPUFeatures(); |
| Matcher matcher = additionalCPUInfoRE.matcher(cpuFeaturesString); |
| if (matcher.find()) { |
| additionalCPUInfo = matcher.group(1); |
| } else { |
| additionalCPUInfo = ""; |
| } |
| String splittedFeatures[] = matcher.replaceAll("").split("(, )| "); |
| |
| features = Collections.unmodifiableList(Arrays. |
| asList(splittedFeatures)); |
| } |
| |
| /** |
| * Get additional information about CPU. |
| * For example, on X86 in will be family/model/stepping |
| * and number of cores. |
| * |
| * @return additional CPU info |
| */ |
| public static String getAdditionalCPUInfo() { |
| return additionalCPUInfo; |
| } |
| |
| /** |
| * Get all known features supported by CPU. |
| * |
| * @return unmodifiable list with names of all known features |
| * supported by CPU. |
| */ |
| public static List<String> getFeatures() { |
| return features; |
| } |
| |
| /** |
| * Check if some feature is supported by CPU. |
| * |
| * @param feature Name of feature to be tested. |
| * @return <b>true</b> if tested feature is supported by CPU. |
| */ |
| public static boolean hasFeature(String feature) { |
| return features.contains(feature.toLowerCase()); |
| } |
| } |