jdk8-mips64-public/hotspot: test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java@6cbff0651f1a (annotated)

test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java@6cbff0651f1a (annotated)

test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java

Mon, 06 Nov 2017 16:51:47 +0800

author: aoqi
date: Mon, 06 Nov 2017 16:51:47 +0800
changeset 7997: 6cbff0651f1a
parent 7238: 85f4c4ecc963
permissions: -rw-r--r--

[Code Reorganization] remove trailing whitespace to pass jcheck test

 /*
  * 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;
     }
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java@6cbff0651f1a (annotated)

test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java