jdk8-mips64-public/hotspot: test/gc/g1/TestEagerReclaimHumongousRegionsWithRefs.java@6cbff0651f1a (annotated)

test/gc/g1/TestEagerReclaimHumongousRegionsWithRefs.java@6cbff0651f1a (annotated)

test/gc/g1/TestEagerReclaimHumongousRegionsWithRefs.java

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

author: aoqi
date: Mon, 06 Nov 2017 16:51:47 +0800
changeset 7997: 6cbff0651f1a
parent 7828: cbc7c4c9e11c
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 TestEagerReclaimHumongousRegionsWithRefs
  * @bug 8048179
  * @summary Test to make sure that eager reclaim of humongous objects that have previously
  * been referenced by other old gen regions work. We simply try to fill
  * up the heap with humongous objects and create a remembered set entry from an object by
  * referencing that we know is in the old gen. After changing this reference, the object
  * should still be eagerly reclaimable to avoid Full GC.
  * @key gc
  * @library /testlibrary
  */
 import java.util.regex.Pattern;
 import java.util.regex.Matcher;
 import java.util.LinkedList;
 import com.oracle.java.testlibrary.OutputAnalyzer;
 import com.oracle.java.testlibrary.ProcessTools;
 import static com.oracle.java.testlibrary.Asserts.*;
 class RefHolder {
   Object ref;
 }
 class ReclaimRegionFast {
     public static final int M = 1024*1024;
     public static LinkedList<Object> garbageList = new LinkedList<Object>();
     public static void genGarbage() {
         for (int i = 0; i < 32*1024; i++) {
             garbageList.add(new int[100]);
         }
         garbageList.clear();
     }
     // A large object referenced by a static.
     static int[] filler = new int[10 * M];
     // Old gen object referencing the large object, generating remembered
     // set entries.
     static RefHolder fromOld = new RefHolder();
     public static void main(String[] args) {
         int[] large = new int[M];
         Object ref_from_stack = large;
         for (int i = 0; i < 100; i++) {
             // A large object that will be reclaimed eagerly.
             large = new int[6*M];
             fromOld.ref = large;
             genGarbage();
         }
         // Keep the reference to the first object alive.
         System.out.println(ref_from_stack);
     }
 }
 public class TestEagerReclaimHumongousRegionsWithRefs {
     public static void main(String[] args) throws Exception {
         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
             "-XX:+UseG1GC",
             "-Xms128M",
             "-Xmx128M",
             "-Xmn16M",
             "-XX:+PrintGC",
             ReclaimRegionFast.class.getName());
         Pattern p = Pattern.compile("Full GC");
         OutputAnalyzer output = new OutputAnalyzer(pb.start());
         int found = 0;
         Matcher m = p.matcher(output.getStdout());
         while (m.find()) {
             found++;
         }
         System.out.println("Issued " + found + " Full GCs");
         assertLessThan(found, 10, "Found that " + found + " Full GCs were issued. This is larger than the bound. Eager reclaim of objects once referenced from old gen seems to not work at all");
         output.shouldHaveExitValue(0);
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/gc/g1/TestEagerReclaimHumongousRegionsWithRefs.java@6cbff0651f1a (annotated)

test/gc/g1/TestEagerReclaimHumongousRegionsWithRefs.java