test/hotspot/jtreg/gc/cms/DisableResizePLAB.java
branchaefimov-dns-client-branch
changeset 59099 fcdb8e7ead8f
parent 58984 15e026239a6c
parent 59075 355f4f42dda5
child 59100 b92aac38b046
equal deleted inserted replaced
58984:15e026239a6c 59099:fcdb8e7ead8f
     1 /*
       
     2  * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
       
     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
       
     4  *
       
     5  * This code is free software; you can redistribute it and/or modify it
       
     6  * under the terms of the GNU General Public License version 2 only, as
       
     7  * published by the Free Software Foundation.
       
     8  *
       
     9  * This code is distributed in the hope that it will be useful, but WITHOUT
       
    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
       
    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
       
    12  * version 2 for more details (a copy is included in the LICENSE file that
       
    13  * accompanied this code).
       
    14  *
       
    15  * You should have received a copy of the GNU General Public License version
       
    16  * 2 along with this work; if not, write to the Free Software Foundation,
       
    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
       
    18  *
       
    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
       
    20  * or visit www.oracle.com if you need additional information or have any
       
    21  * questions.
       
    22  */
       
    23 
       
    24 package gc.cms;
       
    25 
       
    26 import static java.lang.ref.Reference.reachabilityFence;
       
    27 
       
    28 /*
       
    29  * @test DisableResizePLAB
       
    30  * @key gc
       
    31  * @bug 8060467
       
    32  * @author filipp.zhinkin@oracle.com, john.coomes@oracle.com
       
    33  * @requires vm.gc.ConcMarkSweep & !vm.graal.enabled
       
    34  * @summary Run CMS with PLAB resizing disabled and a small OldPLABSize
       
    35  * @run main/othervm -XX:+UseConcMarkSweepGC -XX:-ResizePLAB -XX:OldPLABSize=1k -Xmx256m -Xlog:gc=debug gc.cms.DisableResizePLAB
       
    36  */
       
    37 
       
    38 public class DisableResizePLAB {
       
    39     public static void main(String args[]) throws Exception {
       
    40         Object garbage[] = new Object[1_000];
       
    41         for (int i = 0; i < garbage.length; i++) {
       
    42             garbage[i] = new byte[0];
       
    43         }
       
    44         long startTime = System.currentTimeMillis();
       
    45         while (System.currentTimeMillis() - startTime < 10_000) {
       
    46             reachabilityFence(new byte[1024]);
       
    47         }
       
    48     }
       
    49 }