1 /* 2 * Copyright (c) 2018, 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.nvdimm; 25 26 /* 27 * @test TestYoungObjectsOnDram 28 * @summary Check that objects in young generation reside in dram. 29 * @requires vm.gc=="null" & os.family != "aix" 30 * @requires test.vm.gc.nvdimm 31 * @library /test/lib 32 * @build sun.hotspot.WhiteBox 33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 34 * @run main gc.nvdimm.TestYoungObjectsOnDram -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 35 * -XX:+WhiteBoxAPI 36 */ 37 38 import jdk.test.lib.process.OutputAnalyzer; 39 import jdk.test.lib.process.ProcessTools; 40 import jdk.test.lib.Asserts; 41 import sun.hotspot.WhiteBox; 42 43 import java.util.ArrayList; 44 import java.util.Collections; 45 46 /** 47 * Test spawns YoungObjectTest in a separate VM and expects that it 48 * completes without a RuntimeException. 49 */ 50 public class TestYoungObjectsOnDram { 51 52 public static final int ALLOCATION_SIZE = 100; 53 private static ArrayList<String> testOpts; 54 55 public static void main(String args[]) throws Exception { 56 testOpts = new ArrayList<>(); 57 58 String[] common_options = new String[] { 59 "-Xbootclasspath/a:.", 60 "-XX:+UnlockExperimentalVMOptions", 61 "-XX:+UnlockDiagnosticVMOptions", 62 "-XX:+WhiteBoxAPI", 63 "-XX:AllocateOldGenAt="+System.getProperty("test.dir", "."), 64 "-XX:SurvivorRatio=1", // Survivor-to-eden ratio is 1:1 65 "-Xms10M", "-Xmx10M", 66 "-XX:InitialTenuringThreshold=15" // avoid promotion of objects to Old Gen 67 }; 68 69 String testVmOptsStr = System.getProperty("test.java.opts"); 70 if (!testVmOptsStr.isEmpty()) { 71 String[] testVmOpts = testVmOptsStr.split(" "); 72 Collections.addAll(testOpts, testVmOpts); 73 } 74 Collections.addAll(testOpts, common_options); 75 76 // Test with G1 GC 77 runTest("-XX:+UseG1GC"); 78 // Test with ParallelOld GC 79 runTest("-XX:+UseParallelOldGC -XX:-UseAdaptiveGCBoundary"); 80 runTest("-XX:+UseParallelOldGC -XX:+UseAdaptiveGCBoundary"); 81 } 82 83 private static void runTest(String... extraFlags) throws Exception { 84 Collections.addAll(testOpts, extraFlags); 85 testOpts.add(YoungObjectTest.class.getName()); 86 System.out.println(testOpts); 87 88 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false, 89 testOpts.toArray(new String[testOpts.size()])); 90 91 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 92 System.out.println(output.getStdout()); 93 output.shouldHaveExitValue(0); 94 } 95 } 96 97 /** 98 * This class tests that newly created object is in Young generation and resides in DRAM. 99 * The necessary condition for this test is running in VM with the following flags: 100 * -XX:AllocateOldGenAt=, -XX:InitialTenuringThreshold=15, -XX:SurvivorRatio=1 101 */ 102 class YoungObjectTest { 103 private static final WhiteBox WB = WhiteBox.getWhiteBox(); 104 105 private static void validateYoungObject(Object o) { 106 Asserts.assertTrue(!WB.isObjectInOldGen(o), 107 "Object is supposed to be in YoungGen"); 108 109 long youngObj_addr = WB.getObjectAddress(o); 110 long dram_heap_start = WB.dramReservedStart(); 111 long dram_heap_end = WB.dramReservedEnd(); 112 113 Asserts.assertTrue(youngObj_addr >= dram_heap_start && youngObj_addr <= dram_heap_end, 114 "Young object does not reside in DRAM"); 115 } 116 117 public static void main(String args[]) throws Exception { 118 // allocate an object 119 byte[] youngObj = new byte[TestYoungObjectsOnDram.ALLOCATION_SIZE]; 120 validateYoungObject(youngObj); 121 122 // Start a Young GC and check that object is still in DRAM. 123 // We have used -XX:InitialTenuringThreshold=15 to invoke this test 124 WB.youngGC(); 125 validateYoungObject(youngObj); 126 } 127 }