jdk-sandbox: hotspot/test/gc/TestSmallHeap.java@2268133fdd5f (annotated)

28205 6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	1	/*
28479 2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	2	* Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
28205 6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	4	*
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	5	* This code is free software; you can redistribute it and/or modify it
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	6	* under the terms of the GNU General Public License version 2 only, as
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	7	* published by the Free Software Foundation.
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	8	*
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	9	* This code is distributed in the hope that it will be useful, but WITHOUT
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	12	* version 2 for more details (a copy is included in the LICENSE file that
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	13	* accompanied this code).
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	14	*
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	15	* You should have received a copy of the GNU General Public License version
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	16	* 2 along with this work; if not, write to the Free Software Foundation,
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	18	*
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	20	* or visit www.oracle.com if you need additional information or have any
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	21	* questions.
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	22	*/
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	23
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	24	/**
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	25	* @test TestSmallHeap
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	26	* @bug 8067438
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	27	* @requires vm.gc=="null"
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	28	* @summary Verify that starting the VM with a small heap works
28479 2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	29	* @library /testlibrary /../../test/lib
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	30	* @build TestSmallHeap
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	31	* @run main ClassFileInstaller sun.hotspot.WhiteBox
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	32	* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseParallelGC TestSmallHeap
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	33	* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseSerialGC TestSmallHeap
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	34	* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseG1GC TestSmallHeap
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	35	* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xmx2m -XX:+UseConcMarkSweepGC TestSmallHeap
28205 6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	36	*
28479 2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	37	* Note: It would be nice to verify the minimal supported heap size (2m) here,
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	38	* but we align the heap size based on the card table size. And the card table
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	39	* size is aligned based on the minimal pages size provided by the os. This
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	40	* means that on most platforms, where the minimal page size is 4k, we get a
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	41	* minimal heap size of 2m but on Solaris/Sparc we have a page size of 8k and
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	42	* get a minimal heap size of 4m. And on platforms where the page size is 64k
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	43	* we get a minimal heap size of 32m. We never use large pages for the card table.
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	44	*
28205 6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	45	* There is also no check in the VM for verifying that the maximum heap size
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	46	* is larger than the supported minimal heap size. This means that specifying
28479 2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	47	* -Xmx1m on the command line is fine but will give a heap of 2m (or 4m or 32m).
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	48	*
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	49	* To work around these rather strange behaviors this test uses -Xmx2m but then
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	50	* calculates what the expected heap size should be. The calculation is a
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	51	* simplified version of the code in the VM. We assume that the card table will
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	52	* use one page. Each byte in the card table corresponds to 512 bytes on the heap.
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	53	* So, the expected heap size is page_size * 512.
28205 6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	54	*/
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	55
28479 2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	56	import com.oracle.java.testlibrary.*;
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	57	import static com.oracle.java.testlibrary.Asserts.*;
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	58	import sun.hotspot.WhiteBox;
28205 6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	59	import sun.management.ManagementFactoryHelper;
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	60
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	61	public class TestSmallHeap {
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	62
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	63	public static void main(String[] args) {
28479 2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	64	WhiteBox wb = WhiteBox.getWhiteBox();
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	65	int pageSize = wb.getVMPageSize();
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	66	int heapBytesPerCard = 512;
2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	67	long expectedMaxHeap = pageSize * heapBytesPerCard;
28205 6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	68	String maxHeap = ManagementFactoryHelper.getDiagnosticMXBean().getVMOption("MaxHeapSize").getValue();
28479 2268133fdd5f 8068653: TestSmalllHeap.java fails when the page size is 64k brutisso parents: 28210 diff changeset	69	assertEQ(Long.parseLong(maxHeap), expectedMaxHeap);
28205 6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	70	}
6977216c35f2 8067438: Add test to verify minimal heap size brutisso parents: diff changeset	71	}

author	brutisso
	Fri, 09 Jan 2015 08:38:23 +0100
changeset 28479	2268133fdd5f
parent 28210	279085467d0a
child 28635	4aebb881eaf9
permissions	-rw-r--r--