102 lines
3.9 KiB
Java
102 lines
3.9 KiB
Java
/*
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* Copyright (c) 2014, 2023, 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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package gc.g1;
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/*
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* @test TestG1TraceEagerReclaimHumongousObjects
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* @bug 8058801 8048179
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* @summary Ensure that the output for a G1TraceEagerReclaimHumongousObjects
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* includes the expected necessary messages.
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* @requires vm.gc.G1
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run driver gc.g1.TestG1TraceEagerReclaimHumongousObjects
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*/
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import java.util.LinkedList;
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public class TestG1TraceEagerReclaimHumongousObjects {
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public static void main(String[] args) throws Exception {
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OutputAnalyzer output = ProcessTools.executeLimitedTestJava("-XX:+UseG1GC",
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"-Xms128M",
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"-Xmx128M",
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"-Xmn16M",
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"-XX:G1HeapRegionSize=1M",
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"-Xlog:gc+phases=trace,gc+humongous=trace",
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"-XX:+UnlockExperimentalVMOptions",
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GCWithHumongousObjectTest.class.getName());
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System.out.println(output.getStdout());
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// As G1ReclaimDeadHumongousObjectsAtYoungGC is set(default), below logs should be displayed.
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output.shouldContain("Humongous Reclaim");
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output.shouldContain("Humongous Total");
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output.shouldContain("Humongous Candidate");
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output.shouldContain("Humongous Reclaimed");
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// As G1TraceReclaimDeadHumongousObjectsAtYoungGC is set and GCWithHumongousObjectTest has humongous objects,
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// these logs should be displayed.
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output.shouldContain("Humongous region");
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output.shouldContain("Reclaimed humongous region");
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output.shouldHaveExitValue(0);
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}
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static class GCWithHumongousObjectTest {
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public static final int M = 1024*1024;
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public static LinkedList<Object> garbageList = new LinkedList<Object>();
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// A large object referenced by a static.
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static int[] filler = new int[10 * M];
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public static void genGarbage() {
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for (int i = 0; i < 32*1024; i++) {
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garbageList.add(new int[100]);
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}
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garbageList.clear();
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}
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public static void main(String[] args) {
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int[] large = new int[M];
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Object ref = large;
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System.out.println("Creating garbage");
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for (int i = 0; i < 100; i++) {
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// A large object that will be reclaimed eagerly.
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large = new int[6*M];
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genGarbage();
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// Make sure that the compiler cannot completely remove
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// the allocation of the large object until here.
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System.out.println(large);
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}
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// Keep the reference to the first object alive.
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System.out.println(ref);
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System.out.println("Done");
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}
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}
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}
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