1 /* 2 * Copyright (c) 2014, 2017, 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 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true) 28 * @library /test/lib 29 * @modules java.base/jdk.internal.misc 30 * java.management 31 * @run main SpaceUtilizationCheck 32 */ 33 34 import jdk.test.lib.cds.CDSTestUtils; 35 import jdk.test.lib.process.OutputAnalyzer; 36 37 import java.util.regex.Pattern; 38 import java.util.regex.Matcher; 39 import java.util.ArrayList; 40 import java.lang.Integer; 41 42 public class SpaceUtilizationCheck { 43 // Minimum allowed utilization value (percent) 44 // The goal is to have this number to be 50% for RO and RW regions 45 // Once that feature is implemented, increase the MIN_UTILIZATION to 50 46 private static final int MIN_UTILIZATION = 30; 47 48 // Only RO and RW regions are considered for this check, since they 49 // currently account for the bulk of the shared space 50 private static final int NUMBER_OF_CHECKED_SHARED_REGIONS = 2; 51 52 public static void main(String[] args) throws Exception { 53 OutputAnalyzer output = CDSTestUtils.createArchive(); 54 CDSTestUtils.checkDump(output); 55 56 String stdout = output.getStdout(); 57 ArrayList<String> utilization = findUtilization(stdout); 58 59 if (utilization.size() != NUMBER_OF_CHECKED_SHARED_REGIONS ) 60 throw new RuntimeException("The output format of sharing summary has changed"); 61 62 for(String str : utilization) { 63 int value = Integer.parseInt(str); 64 if (value < MIN_UTILIZATION) { 65 System.out.println(stdout); 66 throw new RuntimeException("Utilization for one of the regions" + 67 "is below a threshold of " + MIN_UTILIZATION + "%"); 68 } 69 } 70 } 71 72 public static ArrayList<String> findUtilization(String input) { 73 ArrayList<String> regions = filterRegionsOfInterest(input.split("\n")); 74 return filterByPattern(filterByPattern(regions, "bytes \\[.*% used\\]"), "\\d+"); 75 } 76 77 private static ArrayList<String> filterByPattern(Iterable<String> input, String pattern) { 78 ArrayList<String> result = new ArrayList<String>(); 79 for (String str : input) { 80 Matcher matcher = Pattern.compile(pattern).matcher(str); 81 if (matcher.find()) { 82 result.add(matcher.group()); 83 } 84 } 85 return result; 86 } 87 88 private static ArrayList<String> filterRegionsOfInterest(String[] inputLines) { 89 ArrayList<String> result = new ArrayList<String>(); 90 for (String str : inputLines) { 91 if (str.contains("ro space:") || str.contains("rw space:")) { 92 result.add(str); 93 } 94 } 95 return result; 96 } 97 }