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test/gc/g1/TestHumongousAllocInitialMark.java@710a3c8b516e (annotated)

test/gc/g1/TestHumongousAllocInitialMark.java

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 6198

55fb97c4c58d

parent 0

f90c822e73f8

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test TestHumongousAllocInitialMark
aoqi@0	26	* @bug 7168848
aoqi@0	27	* @summary G1: humongous object allocations should initiate marking cycles when necessary
aoqi@0	28	* @library /testlibrary
aoqi@0	29	*/
aoqi@0	30
aoqi@0	31	import com.oracle.java.testlibrary.*;
aoqi@0	32
aoqi@0	33	public class TestHumongousAllocInitialMark {
aoqi@0	34	private static final int heapSize = 200; // MB
aoqi@0	35	private static final int heapRegionSize = 1; // MB
aoqi@0	36	private static final int initiatingHeapOccupancyPercent = 50; // %
aoqi@0	37
aoqi@0	38	public static void main(String[] args) throws Exception {
aoqi@0	39	ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
aoqi@0	40	"-XX:+UseG1GC",
aoqi@0	41	"-Xms" + heapSize + "m",
aoqi@0	42	"-Xmx" + heapSize + "m",
aoqi@0	43	"-XX:G1HeapRegionSize=" + heapRegionSize + "m",
aoqi@0	44	"-XX:InitiatingHeapOccupancyPercent=" + initiatingHeapOccupancyPercent,
aoqi@0	45	"-XX:+PrintGC",
aoqi@0	46	HumongousObjectAllocator.class.getName());
aoqi@0	47
aoqi@0	48	OutputAnalyzer output = new OutputAnalyzer(pb.start());
aoqi@0	49	output.shouldContain("GC pause (G1 Humongous Allocation) (young) (initial-mark)");
aoqi@0	50	output.shouldNotContain("Full GC");
aoqi@0	51	output.shouldHaveExitValue(0);
aoqi@0	52	}
aoqi@0	53
aoqi@0	54	static class HumongousObjectAllocator {
aoqi@0	55	private static byte[] dummy;
aoqi@0	56
aoqi@0	57	public static void main(String [] args) throws Exception {
aoqi@0	58	// Make object size 75% of region size
aoqi@0	59	final int humongousObjectSize =
aoqi@0	60	(int)(heapRegionSize * 1024 * 1024 * 0.75);
aoqi@0	61
aoqi@0	62	// Number of objects to allocate to go above IHOP
aoqi@0	63	final int humongousObjectAllocations =
aoqi@0	64	(int)((heapSize * initiatingHeapOccupancyPercent / 100.0) / heapRegionSize) + 1;
aoqi@0	65
aoqi@0	66	// Allocate
aoqi@0	67	for (int i = 1; i <= humongousObjectAllocations; i++) {
aoqi@0	68	System.out.println("Allocating humongous object " + i + "/" + humongousObjectAllocations +
aoqi@0	69	" of size " + humongousObjectSize + " bytes");
aoqi@0	70	dummy = new byte[humongousObjectSize];
aoqi@0	71	}
aoqi@0	72	}
aoqi@0	73	}
aoqi@0	74	}
aoqi@0	75