| /* |
| * 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. |
| */ |
| |
| /* |
| * @test SpaceUtilizationCheck |
| * @summary Check if the space utilization for shared spaces is adequate |
| * @library /testlibrary |
| * @run main SpaceUtilizationCheck |
| */ |
| |
| import com.oracle.java.testlibrary.*; |
| |
| import java.util.regex.Pattern; |
| import java.util.regex.Matcher; |
| import java.util.ArrayList; |
| import java.lang.Integer; |
| |
| public class SpaceUtilizationCheck { |
| // Minimum allowed utilization value (percent) |
| // The goal is to have this number to be 50% for RO and RW regions |
| // Once that feature is implemented, increase the MIN_UTILIZATION to 50 |
| private static final int MIN_UTILIZATION = 30; |
| |
| // Only RO and RW regions are considered for this check, since they |
| // currently account for the bulk of the shared space |
| private static final int NUMBER_OF_CHECKED_SHARED_REGIONS = 2; |
| |
| public static void main(String[] args) throws Exception { |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:SharedArchiveFile=./test.jsa", |
| "-Xshare:dump"); |
| |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| String stdout = output.getStdout(); |
| ArrayList<String> utilization = findUtilization(stdout); |
| |
| if (utilization.size() != NUMBER_OF_CHECKED_SHARED_REGIONS ) |
| throw new RuntimeException("The output format of sharing summary has changed"); |
| |
| for(String str : utilization) { |
| int value = Integer.parseInt(str); |
| if (value < MIN_UTILIZATION) { |
| System.out.println(stdout); |
| throw new RuntimeException("Utilization for one of the regions" + |
| "is below a threshold of " + MIN_UTILIZATION + "%"); |
| } |
| } |
| } |
| |
| public static ArrayList<String> findUtilization(String input) { |
| ArrayList<String> regions = filterRegionsOfInterest(input.split("\n")); |
| return filterByPattern(filterByPattern(regions, "bytes \\[.*% used\\]"), "\\d+"); |
| } |
| |
| private static ArrayList<String> filterByPattern(Iterable<String> input, String pattern) { |
| ArrayList<String> result = new ArrayList<String>(); |
| for (String str : input) { |
| Matcher matcher = Pattern.compile(pattern).matcher(str); |
| if (matcher.find()) { |
| result.add(matcher.group()); |
| } |
| } |
| return result; |
| } |
| |
| private static ArrayList<String> filterRegionsOfInterest(String[] inputLines) { |
| ArrayList<String> result = new ArrayList<String>(); |
| for (String str : inputLines) { |
| if (str.contains("ro space:") || str.contains("rw space:")) { |
| result.add(str); |
| } |
| } |
| return result; |
| } |
| } |