mnunez@3808: /*
mikael@6198:  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
mnunez@3808:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mnunez@3808:  *
mnunez@3808:  * This code is free software; you can redistribute it and/or modify it
mnunez@3808:  * under the terms of the GNU General Public License version 2 only, as
mnunez@3808:  * published by the Free Software Foundation.
mnunez@3808:  *
mnunez@3808:  * This code is distributed in the hope that it will be useful, but WITHOUT
mnunez@3808:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mnunez@3808:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mnunez@3808:  * version 2 for more details (a copy is included in the LICENSE file that
mnunez@3808:  * accompanied this code).
mnunez@3808:  *
mnunez@3808:  * You should have received a copy of the GNU General Public License version
mnunez@3808:  * 2 along with this work; if not, write to the Free Software Foundation,
mnunez@3808:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mnunez@3808:  *
mnunez@3808:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mnunez@3808:  * or visit www.oracle.com if you need additional information or have any
mnunez@3808:  * questions.
mnunez@3808:  */
mnunez@3808: 
mnunez@3808: /*
pliden@5937:  * @test TestHumongousAllocInitialMark
mnunez@3808:  * @bug 7168848
mnunez@3808:  * @summary G1: humongous object allocations should initiate marking cycles when necessary
pliden@5937:  * @library /testlibrary
mnunez@3808:  */
mnunez@3808: 
pliden@5937: import com.oracle.java.testlibrary.*;
mnunez@3808: 
pliden@5937: public class TestHumongousAllocInitialMark {
pliden@5937:     private static final int heapSize                       = 200; // MB
pliden@5937:     private static final int heapRegionSize                 = 1;   // MB
pliden@5937:     private static final int initiatingHeapOccupancyPercent = 50;  // %
mnunez@3808: 
pliden@5937:     public static void main(String[] args) throws Exception {
pliden@5937:         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
pliden@5937:             "-XX:+UseG1GC",
pliden@5937:             "-Xms" + heapSize + "m",
pliden@5937:             "-Xmx" + heapSize + "m",
pliden@5937:             "-XX:G1HeapRegionSize=" + heapRegionSize + "m",
pliden@5937:             "-XX:InitiatingHeapOccupancyPercent=" + initiatingHeapOccupancyPercent,
pliden@5937:             "-XX:+PrintGC",
pliden@5937:             HumongousObjectAllocator.class.getName());
pliden@5937: 
pliden@5937:         OutputAnalyzer output = new OutputAnalyzer(pb.start());
pliden@5937:         output.shouldContain("GC pause (G1 Humongous Allocation) (young) (initial-mark)");
pliden@5937:         output.shouldNotContain("Full GC");
pliden@5937:         output.shouldHaveExitValue(0);
mnunez@3808:     }
mnunez@3808: 
pliden@5937:     static class HumongousObjectAllocator {
pliden@5937:         private static byte[] dummy;
pliden@5937: 
pliden@5937:         public static void main(String [] args) throws Exception {
pliden@5937:             // Make object size 75% of region size
pliden@5937:             final int humongousObjectSize =
pliden@5937:                 (int)(heapRegionSize * 1024 * 1024 * 0.75);
pliden@5937: 
pliden@5937:             // Number of objects to allocate to go above IHOP
pliden@5937:             final int humongousObjectAllocations =
pliden@5937:                 (int)((heapSize * initiatingHeapOccupancyPercent / 100.0) / heapRegionSize) + 1;
pliden@5937: 
pliden@5937:             // Allocate
pliden@5937:             for (int i = 1; i <= humongousObjectAllocations; i++) {
pliden@5937:                 System.out.println("Allocating humongous object " + i + "/" + humongousObjectAllocations +
pliden@5937:                                    " of size " + humongousObjectSize + " bytes");
pliden@5937:                 dummy = new byte[humongousObjectSize];
mnunez@3808:             }
mnunez@3808:         }
mnunez@3808:     }
mnunez@3808: }
mnunez@3808: