1 /* 2 * Copyright (c) 2014, 2015, 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 SpaceUtilizationCheck 26 * @summary Check if the space utilization for shared spaces is adequate 27 * @library /testlibrary 28 * @run main SpaceUtilizationCheck 29 */ 30 31 import com.oracle.java.testlibrary.*; 32 33 import java.util.regex.Pattern; 34 import java.util.regex.Matcher; 35 import java.util.ArrayList; 36 import java.lang.Integer; 37 38 public class SpaceUtilizationCheck { 39 // Minimum allowed utilization value (percent) 40 // The goal is to have this number to be 50% for RO and RW regions 41 // Once that feature is implemented, increase the MIN_UTILIZATION to 50 42 private static final int MIN_UTILIZATION = 30; 43 44 // Only RO and RW regions are considered for this check, since they 45 // currently account for the bulk of the shared space 46 private static final int NUMBER_OF_CHECKED_SHARED_REGIONS = 2; 47 48 public static void main(String[] args) throws Exception { 49 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 50 "-XX:+UnlockDiagnosticVMOptions", 51 "-XX:SharedArchiveFile=./SpaceUtilizationCheck.jsa", 52 "-Xshare:dump"); 53 54 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 55 String stdout = output.getStdout(); 56 ArrayList<String> utilization = findUtilization(stdout); 57 58 if (utilization.size() != NUMBER_OF_CHECKED_SHARED_REGIONS ) 59 throw new RuntimeException("The output format of sharing summary has changed"); 60 61 for(String str : utilization) { 62 int value = Integer.parseInt(str); 63 if (value < MIN_UTILIZATION) { 64 System.out.println(stdout); 65 throw new RuntimeException("Utilization for one of the regions" + 66 "is below a threshold of " + MIN_UTILIZATION + "%"); 67 } 68 } 69 } 70 71 public static ArrayList<String> findUtilization(String input) { 72 ArrayList<String> regions = filterRegionsOfInterest(input.split("\n")); 73 return filterByPattern(filterByPattern(regions, "bytes \\[.*% used\\]"), "\\d+"); 74 } 75 76 private static ArrayList<String> filterByPattern(Iterable<String> input, String pattern) { 77 ArrayList<String> result = new ArrayList<String>(); 78 for (String str : input) { 79 Matcher matcher = Pattern.compile(pattern).matcher(str); 80 if (matcher.find()) { 81 result.add(matcher.group()); 82 } 83 } 84 return result; 85 } 86 87 private static ArrayList<String> filterRegionsOfInterest(String[] inputLines) { 88 ArrayList<String> result = new ArrayList<String>(); 89 for (String str : inputLines) { 90 if (str.contains("ro space:") || str.contains("rw space:")) { 91 result.add(str); 92 } 93 } 94 return result; 95 } 96 }