20488
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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 * @test SpaceUtilizationCheck
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26 * @summary Check if the space utilization for shared spaces is adequate
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27 * @library /testlibrary
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28 * @run main SpaceUtilizationCheck
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29 */
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30
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31 import com.oracle.java.testlibrary.*;
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32
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33 import java.util.regex.Pattern;
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34 import java.util.regex.Matcher;
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35 import java.util.ArrayList;
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36 import java.lang.Integer;
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37
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38 public class SpaceUtilizationCheck {
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39 // Minimum allowed utilization value (percent)
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40 // The goal is to have this number to be 50% for RO and RW regions
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41 // Once that feature is implemented, increase the MIN_UTILIZATION to 50
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42 private static final int MIN_UTILIZATION = 30;
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43
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44 // Only RO and RW regions are considered for this check, since they
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45 // currently account for the bulk of the shared space
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46 private static final int NUMBER_OF_CHECKED_SHARED_REGIONS = 2;
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47
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48 public static void main(String[] args) throws Exception {
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49 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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50 "-XX:+UnlockDiagnosticVMOptions",
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51 "-XX:SharedArchiveFile=./test.jsa",
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52 "-Xshare:dump");
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53
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54 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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55 String stdout = output.getStdout();
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56 ArrayList<String> utilization = findUtilization(stdout);
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57
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58 if (utilization.size() != NUMBER_OF_CHECKED_SHARED_REGIONS )
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59 throw new RuntimeException("The output format of sharing summary has changed");
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60
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61 for(String str : utilization) {
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62 int value = Integer.parseInt(str);
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63 if (value < MIN_UTILIZATION) {
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64 System.out.println(stdout);
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65 throw new RuntimeException("Utilization for one of the regions" +
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66 "is below a threshold of " + MIN_UTILIZATION + "%");
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67 }
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68 }
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69 }
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70
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71 public static ArrayList<String> findUtilization(String input) {
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72 ArrayList<String> regions = filterRegionsOfInterest(input.split("\n"));
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73 return filterByPattern(filterByPattern(regions, "bytes \\[.*% used\\]"), "\\d+");
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74 }
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75
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76 private static ArrayList<String> filterByPattern(Iterable<String> input, String pattern) {
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77 ArrayList<String> result = new ArrayList<String>();
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78 for (String str : input) {
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79 Matcher matcher = Pattern.compile(pattern).matcher(str);
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80 if (matcher.find()) {
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81 result.add(matcher.group());
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82 }
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83 }
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84 return result;
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85 }
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86
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87 private static ArrayList<String> filterRegionsOfInterest(String[] inputLines) {
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88 ArrayList<String> result = new ArrayList<String>();
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89 for (String str : inputLines) {
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90 if (str.contains("ro space:") || str.contains("rw space:")) {
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91 result.add(str);
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92 }
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93 }
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94 return result;
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95 }
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96 }
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