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Java example source code file (TestSummarizeRSetStatsTools.java)
The TestSummarizeRSetStatsTools.java Java example source code/* * Copyright (c) 2013, 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. */ /* * Common helpers for TestSummarizeRSetStats* tests */ import sun.management.ManagementFactoryHelper; import com.sun.management.HotSpotDiagnosticMXBean; import com.sun.management.VMOption; import com.oracle.java.testlibrary.*; import java.util.regex.Matcher; import java.util.regex.Pattern; import java.lang.Thread; import java.util.ArrayList; import java.util.Arrays; class VerifySummaryOutput { // 4M size, both are directly allocated into the old gen static Object[] largeObject1 = new Object[1024 * 1024]; static Object[] largeObject2 = new Object[1024 * 1024]; static int[] temp; public static void main(String[] args) { // create some cross-references between these objects for (int i = 0; i < largeObject1.length; i++) { largeObject1[i] = largeObject2; } for (int i = 0; i < largeObject2.length; i++) { largeObject2[i] = largeObject1; } int numGCs = Integer.parseInt(args[0]); if (numGCs > 0) { // try to force a minor collection: the young gen is 4M, the // amount of data allocated below is roughly that (4*1024*1024 + // some header data) for (int i = 0; i < 1024 ; i++) { temp = new int[1024]; } } for (int i = 0; i < numGCs - 1; i++) { System.gc(); } } } public class TestSummarizeRSetStatsTools { // the VM is currently run using G1GC, i.e. trying to test G1 functionality. public static boolean testingG1GC() { HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean(); VMOption option = diagnostic.getVMOption("UseG1GC"); if (option.getValue().equals("false")) { System.out.println("Skipping this test. It is only a G1 test."); return false; } return true; } public static String runTest(String[] additionalArgs, int numGCs) throws Exception { ArrayList<String> finalargs = new ArrayList Other Java examples (source code examples)Here is a short list of links related to this Java TestSummarizeRSetStatsTools.java source code file: |
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