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