Mercurial > hg > truffle
view test/runtime/Metaspace/FragmentMetaspaceSimple.java @ 14160:fd7fcd2d2072
replaced == with .equals() for comparisons between JavaMethod/JavaField/JavaType values
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 12 Mar 2014 21:47:35 +0100 |
parents | 699d9df07e59 |
children |
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/* * Copyright (c) 2013, 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 * @library /runtime/testlibrary * @library classes * @build test.Empty ClassUnloadCommon * @run main/othervm/timeout=200 FragmentMetaspaceSimple */ import java.util.ArrayList; /** * Test that tries to fragment the native memory used by class loaders. * Keeps every other class loader alive in order to fragment the memory space * used to store classes and meta data. Since the memory is probably allocated in * chunks per class loader this will cause a lot of fragmentation if not handled * properly since every other chunk will be unused. */ public class FragmentMetaspaceSimple { public static void main(String... args) { runSimple(Long.valueOf(System.getProperty("time", "80000"))); System.gc(); } private static void runSimple(long time) { long startTime = System.currentTimeMillis(); ArrayList<ClassLoader> cls = new ArrayList<>(); for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) { ClassLoader ldr = ClassUnloadCommon.newClassLoader(); if (i % 1000 == 0) { cls.clear(); } // only keep every other class loader alive if (i % 2 == 1) { cls.add(ldr); } Class<?> c = null; try { c = ldr.loadClass("test.Empty"); } catch (ClassNotFoundException ex) { throw new RuntimeException(ex); } c = null; } cls = null; } }