Mercurial > hg > graal-jvmci-8
view test/gc/g1/TestG1TraceEagerReclaimHumongousObjects.java @ 23651:481dcde745b6 jdk8u92-b00
Added tag jdk8u76-b12 for changeset 9a87701e22b3
author | asaha |
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date | Tue, 15 Mar 2016 13:59:15 -0700 |
parents | cbc7c4c9e11c |
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/* * 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 TestG1TraceEagerReclaimHumongousObjects * @bug 8058801 8048179 * @summary Ensure that the output for a G1TraceEagerReclaimHumongousObjects * includes the expected necessary messages. * @key gc * @library /testlibrary */ import com.oracle.java.testlibrary.ProcessTools; import com.oracle.java.testlibrary.OutputAnalyzer; import java.util.LinkedList; public class TestG1TraceEagerReclaimHumongousObjects { public static void main(String[] args) throws Exception { testGCLogs(); testHumongousObjectGCLogs(); } private static void testGCLogs() throws Exception { ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", "-Xms128M", "-Xmx128M", "-Xmn16M", "-XX:G1HeapRegionSize=1M", "-XX:+PrintGC", "-XX:+UnlockExperimentalVMOptions", "-XX:G1LogLevel=finest", "-XX:+G1TraceEagerReclaimHumongousObjects", GCTest.class.getName()); OutputAnalyzer output = new OutputAnalyzer(pb.start()); // As G1EagerReclaimHumongousObjects is set(default), below logs should be displayed. // And GCTest doesn't have humongous objects, so values should be zero. output.shouldContain("[Humongous Reclaim"); output.shouldContain("[Humongous Total: 0]"); output.shouldContain("[Humongous Candidate: 0]"); output.shouldContain("[Humongous Reclaimed: 0]"); output.shouldHaveExitValue(0); } private static void testHumongousObjectGCLogs() throws Exception { ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", "-Xms128M", "-Xmx128M", "-Xmn16M", "-XX:G1HeapRegionSize=1M", "-XX:+PrintGC", "-XX:+UnlockExperimentalVMOptions", "-XX:G1LogLevel=finest", "-XX:+G1TraceEagerReclaimHumongousObjects", GCWithHumongousObjectTest.class.getName()); OutputAnalyzer output = new OutputAnalyzer(pb.start()); // As G1ReclaimDeadHumongousObjectsAtYoungGC is set(default), below logs should be displayed. output.shouldContain("[Humongous Reclaim"); output.shouldContain("[Humongous Total"); output.shouldContain("[Humongous Candidate"); output.shouldContain("[Humongous Reclaimed"); // As G1TraceReclaimDeadHumongousObjectsAtYoungGC is set and GCWithHumongousObjectTest has humongous objects, // these logs should be displayed. output.shouldContain("Live humongous"); output.shouldContain("Dead humongous region"); output.shouldHaveExitValue(0); } static class GCTest { private static byte[] garbage; public static void main(String [] args) { System.out.println("Creating garbage"); // create 128MB of garbage. This should result in at least one GC for (int i = 0; i < 1024; i++) { garbage = new byte[128 * 1024]; } System.out.println("Done"); } } static class GCWithHumongousObjectTest { public static final int M = 1024*1024; public static LinkedList<Object> garbageList = new LinkedList<Object>(); // A large object referenced by a static. static int[] filler = new int[10 * M]; public static void genGarbage() { for (int i = 0; i < 32*1024; i++) { garbageList.add(new int[100]); } garbageList.clear(); } public static void main(String[] args) { int[] large = new int[M]; Object ref = large; System.out.println("Creating garbage"); for (int i = 0; i < 100; i++) { // A large object that will be reclaimed eagerly. large = new int[6*M]; genGarbage(); // Make sure that the compiler cannot completely remove // the allocation of the large object until here. System.out.println(large); } // Keep the reference to the first object alive. System.out.println(ref); System.out.println("Done"); } } }