1 /* 2 * Copyright (c) 2015, 2018, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package jdk.jfr.event.gc.detailed; 26 27 /** 28 * @test 29 * @summary Test allocates humongous objects with G1 GC. Objects 30 * considered humongous when it allocates equals or more than one region. As 31 * we're passing the size of byte array we need adjust it that entire structure 32 * fits exactly to one region, if not - G1 will allocate another almost empty 33 * region as a continue of humongous. Thus we will exhaust memory very fast and 34 * test will fail with OOME. 35 * @requires vm.gc == "null" | vm.gc == "G1" 36 * @library /test/lib /test/jdk 37 * @run main/othervm -XX:+UseG1GC -XX:MaxNewSize=5m -Xmx256m -XX:G1HeapRegionSize=1048576 jdk.jfr.event.gc.detailed.TestStressBigAllocationGCEventsWithG1 1048544 38 */ 39 public class TestStressBigAllocationGCEventsWithG1 { 40 41 public static void main(String[] args) throws Exception { 42 new StressAllocationGCEvents().run(args); 43 } 44 }