84 lines
3.3 KiB
Java
84 lines
3.3 KiB
Java
/*
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* Copyright (c) 2012, 2024, 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 TestHumongousAllocConcurrentStart
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* @bug 7168848
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* @summary G1: humongous object allocations should initiate marking cycles when necessary
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* @requires vm.gc.G1
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* @requires vm.flagless
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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.TestHumongousAllocConcurrentStart
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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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public class TestHumongousAllocConcurrentStart {
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// Heap sizes < 224 MB are increased to 224 MB if vm_page_size == 64K to
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// fulfill alignment constraints.
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private static final int heapSize = 224; // MB
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private static final int heapRegionSize = 1; // MB
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private static final int initiatingHeapOccupancyPercent = 50; // %
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public static void main(String[] args) throws Exception {
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OutputAnalyzer output = ProcessTools.executeLimitedTestJava(
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"-XX:+UseG1GC",
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"-Xms" + heapSize + "m",
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"-Xmx" + heapSize + "m",
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"-XX:G1HeapRegionSize=" + heapRegionSize + "m",
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"-XX:InitiatingHeapOccupancyPercent=" + initiatingHeapOccupancyPercent,
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"-Xlog:gc",
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HumongousObjectAllocator.class.getName());
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output.shouldContain("Pause Young (Concurrent Start) (G1 Humongous Allocation)");
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output.shouldNotContain("Full GC");
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output.shouldHaveExitValue(0);
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}
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static class HumongousObjectAllocator {
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private static byte[] dummy;
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public static void main(String [] args) throws Exception {
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// Make object size 75% of region size
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final int humongousObjectSize =
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(int)(heapRegionSize * 1024 * 1024 * 0.75);
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// Number of objects to allocate to go above IHOP
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final int humongousObjectAllocations =
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(int)((heapSize * initiatingHeapOccupancyPercent / 100.0) / heapRegionSize) + 1;
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// Allocate
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for (int i = 1; i <= humongousObjectAllocations; i++) {
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System.out.println("Allocating humongous object " + i + "/" + humongousObjectAllocations +
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" of size " + humongousObjectSize + " bytes");
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dummy = new byte[humongousObjectSize];
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}
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}
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}
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}
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