99 lines
3.8 KiB
Java
99 lines
3.8 KiB
Java
/*
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* Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test SpaceUtilizationCheck
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* @summary Check if the space utilization for shared spaces is adequate
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* @library /testlibrary
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run main SpaceUtilizationCheck
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*/
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import jdk.test.lib.*;
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import java.util.regex.Pattern;
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import java.util.regex.Matcher;
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import java.util.ArrayList;
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import java.lang.Integer;
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public class SpaceUtilizationCheck {
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// Minimum allowed utilization value (percent)
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// The goal is to have this number to be 50% for RO and RW regions
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// Once that feature is implemented, increase the MIN_UTILIZATION to 50
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private static final int MIN_UTILIZATION = 30;
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// Only RO and RW regions are considered for this check, since they
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// currently account for the bulk of the shared space
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private static final int NUMBER_OF_CHECKED_SHARED_REGIONS = 2;
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public static void main(String[] args) throws Exception {
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:SharedArchiveFile=./SpaceUtilizationCheck.jsa",
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"-Xshare:dump");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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String stdout = output.getStdout();
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ArrayList<String> utilization = findUtilization(stdout);
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if (utilization.size() != NUMBER_OF_CHECKED_SHARED_REGIONS )
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throw new RuntimeException("The output format of sharing summary has changed");
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for(String str : utilization) {
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int value = Integer.parseInt(str);
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if (value < MIN_UTILIZATION) {
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System.out.println(stdout);
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throw new RuntimeException("Utilization for one of the regions" +
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"is below a threshold of " + MIN_UTILIZATION + "%");
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}
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}
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}
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public static ArrayList<String> findUtilization(String input) {
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ArrayList<String> regions = filterRegionsOfInterest(input.split("\n"));
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return filterByPattern(filterByPattern(regions, "bytes \\[.*% used\\]"), "\\d+");
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}
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private static ArrayList<String> filterByPattern(Iterable<String> input, String pattern) {
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ArrayList<String> result = new ArrayList<String>();
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for (String str : input) {
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Matcher matcher = Pattern.compile(pattern).matcher(str);
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if (matcher.find()) {
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result.add(matcher.group());
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}
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}
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return result;
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}
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private static ArrayList<String> filterRegionsOfInterest(String[] inputLines) {
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ArrayList<String> result = new ArrayList<String>();
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for (String str : inputLines) {
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if (str.contains("ro space:") || str.contains("rw space:")) {
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result.add(str);
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}
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}
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return result;
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}
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}
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