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