Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/test/runtime/Metaspace/FragmentMetaspace.java	Wed Apr 27 01:25:04 2016 +0800
     1.3 @@ -0,0 +1,64 @@
     1.4 +/*
     1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.23 + * or visit www.oracle.com if you need additional information or have any
    1.24 + * questions.
    1.25 + */
    1.26 +
    1.27 +/**
    1.28 + * @test
    1.29 + * @library /runtime/testlibrary
    1.30 + * @build GeneratedClassLoader
    1.31 + * @run main/othervm/timeout=200 FragmentMetaspace
    1.32 + */
    1.33 +
    1.34 +import java.io.IOException;
    1.35 +
    1.36 +/**
    1.37 + * Test that tries to fragment the native memory used by class loaders.
    1.38 + * This test creates class loaders that load classes of increasing size for every
    1.39 + * iteration. By increasing the size of the class meta data needed for every iteration
    1.40 + * we stress the subsystem for allocating native memory for meta data.
    1.41 + */
    1.42 +public class FragmentMetaspace {
    1.43 +
    1.44 +    public static void main(String... args) {
    1.45 +        runGrowing(Long.valueOf(System.getProperty("time", "80000")));
    1.46 +        // try to clean up and unload classes to decrease
    1.47 +        // class verification time in debug vm
    1.48 +        System.gc();
    1.49 +    }
    1.50 +
    1.51 +    private static void runGrowing(long time) {
    1.52 +        long startTime = System.currentTimeMillis();
    1.53 +        for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) {
    1.54 +            try {
    1.55 +                GeneratedClassLoader gcl = new GeneratedClassLoader();
    1.56 +
    1.57 +                Class<?> c = gcl.getGeneratedClasses(i, 100)[0];
    1.58 +                c.newInstance();
    1.59 +                c = null;
    1.60 +
    1.61 +                gcl = null;
    1.62 +            } catch (IOException|InstantiationException|IllegalAccessException ex) {
    1.63 +                throw new RuntimeException(ex);
    1.64 +            }
    1.65 +        }
    1.66 +    }
    1.67 +}