| /* |
| * Copyright (c) 2012, 2016, 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 TestHumongousAllocNearlyFullRegion |
| * @bug 8143587 |
| * @summary G1: humongous object allocations should work even when there is |
| * not enough space in the heapRegion to fit a filler object. |
| * @requires vm.gc.G1 |
| * @modules java.base/jdk.internal.misc |
| * @library /test/lib |
| * @run driver TestHumongousAllocNearlyFullRegion |
| */ |
| |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.process.ProcessTools; |
| |
| public class TestHumongousAllocNearlyFullRegion { |
| // Heap sizes < 224 MB are increased to 224 MB if vm_page_size == 64K to |
| // fulfill alignment constraints. |
| private static final int heapSize = 224; // MB |
| private static final int heapRegionSize = 1; // MB |
| |
| public static void main(String[] args) throws Exception { |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( |
| "-XX:+UseG1GC", |
| "-Xms" + heapSize + "m", |
| "-Xmx" + heapSize + "m", |
| "-XX:G1HeapRegionSize=" + heapRegionSize + "m", |
| "-Xlog:gc", |
| HumongousObjectAllocator.class.getName()); |
| |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldContain("Pause Initial Mark (G1 Humongous Allocation)"); |
| output.shouldHaveExitValue(0); |
| } |
| |
| static class HumongousObjectAllocator { |
| public static void main(String [] args) { |
| for (int i = 0; i < heapSize; i++) { |
| // 131069 is the number of longs it takes to fill a heapRegion except |
| // for 8 bytes on 64 bit. |
| long[] largeObect = new long[131069]; |
| } |
| } |
| } |
| } |
| |