Mercurial > hg > graal-compiler
view test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java @ 21067:69d03eeb5eed
do not perform read elimination for deleted nodes
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Tue, 21 Apr 2015 11:40:25 +0200 |
parents | 85f4c4ecc963 |
children |
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/* * Copyright (c) 2014, 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 * @key gc * @bug 8049831 * @library /testlibrary /testlibrary/whitebox * @build TestCMSClassUnloadingEnabledHWM * @run main ClassFileInstaller sun.hotspot.WhiteBox * @run driver TestCMSClassUnloadingEnabledHWM * @summary Test that -XX:-CMSClassUnloadingEnabled will trigger a Full GC when more than MetaspaceSize metadata is allocated. */ import com.oracle.java.testlibrary.OutputAnalyzer; import com.oracle.java.testlibrary.ProcessTools; import java.lang.management.GarbageCollectorMXBean; import java.lang.management.ManagementFactory; import java.util.ArrayList; import java.util.Arrays; import sun.hotspot.WhiteBox; public class TestCMSClassUnloadingEnabledHWM { private static long MetaspaceSize = 32 * 1024 * 1024; private static long YoungGenSize = 32 * 1024 * 1024; private static OutputAnalyzer run(boolean enableUnloading) throws Exception { ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( "-Xbootclasspath/a:.", "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", "-Xmx128m", "-XX:CMSMaxAbortablePrecleanTime=1", "-XX:CMSWaitDuration=50", "-XX:MetaspaceSize=" + MetaspaceSize, "-Xmn" + YoungGenSize, "-XX:+UseConcMarkSweepGC", "-XX:" + (enableUnloading ? "+" : "-") + "CMSClassUnloadingEnabled", "-XX:+PrintHeapAtGC", "-XX:+PrintGCDetails", "-XX:+PrintGCTimeStamps", TestCMSClassUnloadingEnabledHWM.AllocateBeyondMetaspaceSize.class.getName(), "" + MetaspaceSize); return new OutputAnalyzer(pb.start()); } public static OutputAnalyzer runWithCMSClassUnloading() throws Exception { return run(true); } public static OutputAnalyzer runWithoutCMSClassUnloading() throws Exception { return run(false); } public static void testWithoutCMSClassUnloading() throws Exception { // -XX:-CMSClassUnloadingEnabled is used, so we expect a full GC instead of a concurrent cycle. OutputAnalyzer out = runWithoutCMSClassUnloading(); out.shouldMatch(".*Full GC.*"); out.shouldNotMatch(".*CMS Initial Mark.*"); } public static void testWithCMSClassUnloading() throws Exception { // -XX:+CMSClassUnloadingEnabled is used, so we expect a concurrent cycle instead of a full GC. OutputAnalyzer out = runWithCMSClassUnloading(); out.shouldMatch(".*CMS Initial Mark.*"); out.shouldNotMatch(".*Full GC.*"); } public static void main(String args[]) throws Exception { testWithCMSClassUnloading(); testWithoutCMSClassUnloading(); } public static class AllocateBeyondMetaspaceSize { public static void main(String [] args) throws Exception { if (args.length != 1) { throw new IllegalArgumentException("Usage: <MetaspaceSize>"); } WhiteBox wb = WhiteBox.getWhiteBox(); // Allocate past the MetaspaceSize limit. long metaspaceSize = Long.parseLong(args[0]); long allocationBeyondMetaspaceSize = metaspaceSize * 2; long metaspace = wb.allocateMetaspace(null, allocationBeyondMetaspaceSize); // Wait for at least one GC to occur. The caller will parse the log files produced. GarbageCollectorMXBean cmsGCBean = getCMSGCBean(); while (cmsGCBean.getCollectionCount() == 0) { Thread.sleep(100); } wb.freeMetaspace(null, metaspace, metaspace); } private static GarbageCollectorMXBean getCMSGCBean() { for (GarbageCollectorMXBean gcBean : ManagementFactory.getGarbageCollectorMXBeans()) { if (gcBean.getObjectName().toString().equals("java.lang:type=GarbageCollector,name=ConcurrentMarkSweep")) { return gcBean; } } return null; } } }