1 /* 2 * Copyright (c) 2019, 2020, 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.z; 25 26 /* 27 * @test TestSmallHeap 28 * @requires vm.gc.Z & !vm.graal.enabled 29 * @summary Test ZGC with small heaps 30 * @library / /test/lib 31 * @run driver gc.z.TestSmallHeap 8M 16M 32M 64M 128M 256M 512M 1024M 32 */ 33 34 import jdk.test.lib.process.ProcessTools; 35 import static gc.testlibrary.Allocation.blackHole; 36 37 public class TestSmallHeap { 38 public static class Test { 39 public static void main(String[] args) throws Exception { 40 final long maxCapacity = Runtime.getRuntime().maxMemory(); 41 System.out.println("Max Capacity " + maxCapacity + " bytes"); 42 43 // Allocate byte arrays of increasing length, so that 44 // all allocation paths (small/medium/large) are tested. 45 for (int length = 16; length <= maxCapacity / 16; length *= 2) { 46 System.out.println("Allocating " + length + " bytes"); 47 blackHole(new byte[length]); 48 } 49 50 System.out.println("Success"); 51 } 52 } 53 54 public static void main(String[] args) throws Exception { 55 for (var maxCapacity: args) { 56 ProcessTools.executeProcess(ProcessTools.createJavaProcessBuilder( 57 "-XX:+UseZGC", 58 "-Xlog:gc,gc+init,gc+reloc,gc+heap", 59 "-Xmx" + maxCapacity, 60 Test.class.getName())) 61 .outputTo(System.out) 62 .errorTo(System.out) 63 .shouldContain("Success") 64 .shouldHaveExitValue(0); 65 } 66 } 67 }