128 lines
4.8 KiB
Java
128 lines
4.8 KiB
Java
/*
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* Copyright (c) 2018, 2019, 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.nvdimm;
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/*
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* @test TestYoungObjectsOnDram
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* @summary Check that objects in young generation reside in dram.
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* @requires vm.gc=="null" & os.family != "aix"
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* @requires test.vm.gc.nvdimm
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* @library /test/lib
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* @build sun.hotspot.WhiteBox
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* @run driver ClassFileInstaller sun.hotspot.WhiteBox
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* @run main gc.nvdimm.TestYoungObjectsOnDram -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
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* -XX:+WhiteBoxAPI
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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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import jdk.test.lib.Asserts;
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import sun.hotspot.WhiteBox;
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import java.util.ArrayList;
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import java.util.Collections;
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/**
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* Test spawns YoungObjectTest in a separate VM and expects that it
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* completes without a RuntimeException.
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*/
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public class TestYoungObjectsOnDram {
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public static final int ALLOCATION_SIZE = 100;
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private static ArrayList<String> testOpts;
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public static void main(String args[]) throws Exception {
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testOpts = new ArrayList<>();
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String[] common_options = new String[] {
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"-Xbootclasspath/a:.",
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"-XX:+UnlockExperimentalVMOptions",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:+WhiteBoxAPI",
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"-XX:AllocateOldGenAt="+System.getProperty("test.dir", "."),
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"-XX:SurvivorRatio=1", // Survivor-to-eden ratio is 1:1
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"-Xms10M", "-Xmx10M",
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"-XX:InitialTenuringThreshold=15" // avoid promotion of objects to Old Gen
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};
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String testVmOptsStr = System.getProperty("test.java.opts");
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if (!testVmOptsStr.isEmpty()) {
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String[] testVmOpts = testVmOptsStr.split(" ");
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Collections.addAll(testOpts, testVmOpts);
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}
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Collections.addAll(testOpts, common_options);
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// Test with G1 GC
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runTest("-XX:+UseG1GC");
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// Test with ParallelOld GC
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runTest("-XX:+UseParallelOldGC -XX:-UseAdaptiveGCBoundary");
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runTest("-XX:+UseParallelOldGC -XX:+UseAdaptiveGCBoundary");
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}
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private static void runTest(String... extraFlags) throws Exception {
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Collections.addAll(testOpts, extraFlags);
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testOpts.add(YoungObjectTest.class.getName());
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System.out.println(testOpts);
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false,
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testOpts.toArray(new String[testOpts.size()]));
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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System.out.println(output.getStdout());
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output.shouldHaveExitValue(0);
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}
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}
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/**
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* This class tests that newly created object is in Young generation and resides in DRAM.
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* The necessary condition for this test is running in VM with the following flags:
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* -XX:AllocateOldGenAt=, -XX:InitialTenuringThreshold=15, -XX:SurvivorRatio=1
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*/
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class YoungObjectTest {
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private static final WhiteBox WB = WhiteBox.getWhiteBox();
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private static void validateYoungObject(Object o) {
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Asserts.assertTrue(!WB.isObjectInOldGen(o),
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"Object is supposed to be in YoungGen");
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long youngObj_addr = WB.getObjectAddress(o);
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long dram_heap_start = WB.dramReservedStart();
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long dram_heap_end = WB.dramReservedEnd();
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Asserts.assertTrue(youngObj_addr >= dram_heap_start && youngObj_addr <= dram_heap_end,
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"Young object does not reside in DRAM");
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}
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public static void main(String args[]) throws Exception {
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// allocate an object
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byte[] youngObj = new byte[TestYoungObjectsOnDram.ALLOCATION_SIZE];
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validateYoungObject(youngObj);
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// Start a Young GC and check that object is still in DRAM.
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// We have used -XX:InitialTenuringThreshold=15 to invoke this test
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WB.youngGC();
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validateYoungObject(youngObj);
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}
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}
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