1 /* 2 * Copyright (c) 2015, 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.arguments; 25 26 /* 27 * @test TestMinAndInitialSurvivorRatioFlags 28 * @key gc 29 * @summary Verify that MinSurvivorRatio and InitialSurvivorRatio flags work 30 * @library /test/lib 31 * @library / 32 * @modules java.base/jdk.internal.misc 33 * java.management 34 * @build sun.hotspot.WhiteBox 35 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 36 * @run driver/timeout=240 gc.arguments.TestMinAndInitialSurvivorRatioFlags 37 */ 38 39 import java.lang.management.MemoryUsage; 40 import java.util.Arrays; 41 import java.util.Collections; 42 import java.util.LinkedList; 43 import jdk.test.lib.process.OutputAnalyzer; 44 import jdk.test.lib.process.ProcessTools; 45 import jdk.test.lib.Utils; 46 import sun.hotspot.WhiteBox; 47 48 /* Test verifies that VM can start with any GC when MinSurvivorRatio and 49 * InitialSurvivorRatio flags passed and for Parallel GC it verifies that 50 * after start up survivor ratio equal to InitialSurvivorRatio value and 51 * that actual survivor ratio will never be less than MinSurvivorRatio. 52 */ 53 public class TestMinAndInitialSurvivorRatioFlags { 54 55 public static final long M = 1024 * 1024; 56 public static final long HEAP_SIZE = 200 * M; 57 public static final long NEW_SIZE = 100 * M; 58 main(String args[])59 public static void main(String args[]) throws Exception { 60 LinkedList<String> options = new LinkedList<>( 61 Arrays.asList(Utils.getFilteredTestJavaOpts("-XX:[^ ]*SurvivorRatio=[^ ]+")) 62 ); 63 64 testSurvivorRatio(5, -1, -1, options, true); 65 testSurvivorRatio(10, -1, -1, options, true); 66 testSurvivorRatio(-1, 5, 3, options, true); 67 testSurvivorRatio(-1, 15, 3, options, true); 68 testSurvivorRatio(-1, 15, 3, options, false); 69 testSurvivorRatio(-1, 10, 10, options, true); 70 testSurvivorRatio(-1, 3, 15, options, true); 71 testSurvivorRatio(-1, 3, 15, options, false); 72 } 73 74 /** 75 * Test that MinSurvivorRatio and InitialSurvivorRatio flags work. 76 * 77 * @param survivorRatio value for -XX:SurvivorRatio option, omitted if negative 78 * @param initRatio value for -XX:InitialSurvivorRatio option, omitted if negative 79 * @param minRatio value for -XX:MinSurvivorRatio option, omitted if negative 80 * @param options additional options for VM 81 * @param useAdaptiveSizePolicy turn on or off UseAdaptiveSizePolicy option 82 */ testSurvivorRatio(int survivorRatio, int initRatio, int minRatio, LinkedList<String> options, boolean useAdaptiveSizePolicy)83 public static void testSurvivorRatio(int survivorRatio, 84 int initRatio, 85 int minRatio, 86 LinkedList<String> options, 87 boolean useAdaptiveSizePolicy) throws Exception { 88 89 LinkedList<String> vmOptions = new LinkedList<>(options); 90 Collections.addAll(vmOptions, 91 "-Xbootclasspath/a:.", 92 "-XX:+UnlockDiagnosticVMOptions", 93 "-XX:+WhiteBoxAPI", 94 "-XX:MaxNewSize=" + NEW_SIZE, "-XX:NewSize=" + NEW_SIZE, 95 "-Xmx" + HEAP_SIZE, "-Xms" + HEAP_SIZE, 96 (survivorRatio >= 0 ? "-XX:SurvivorRatio=" + survivorRatio : ""), 97 (initRatio >= 0 ? "-XX:InitialSurvivorRatio=" + initRatio : ""), 98 (minRatio >= 0 ? "-XX:MinSurvivorRatio=" + minRatio : ""), 99 (useAdaptiveSizePolicy ? "-XX:+UseAdaptiveSizePolicy" : "-XX:-UseAdaptiveSizePolicy"), 100 SurvivorRatioVerifier.class.getName(), 101 Integer.toString(survivorRatio), 102 Integer.toString(initRatio), 103 Integer.toString(minRatio), 104 Boolean.toString(useAdaptiveSizePolicy) 105 ); 106 vmOptions.removeIf((String p) -> p.isEmpty()); 107 ProcessBuilder procBuilder = GCArguments.createJavaProcessBuilder(vmOptions.toArray(new String[vmOptions.size()])); 108 OutputAnalyzer analyzer = new OutputAnalyzer(procBuilder.start()); 109 analyzer.shouldHaveExitValue(0); 110 } 111 112 /** 113 * Class that verifies survivor ratio. 114 * Will be executed in tested VM. Checks initial size of eden and survivor paces with alignment. 115 */ 116 public static class SurvivorRatioVerifier { 117 118 public static WhiteBox wb = WhiteBox.getWhiteBox(); 119 120 public static final int MAX_ITERATIONS = 10; 121 public static final int ARRAY_LENGTH = 10000; 122 public static final int CHUNK_SIZE = 10000; 123 124 public static byte garbage[][] = new byte[ARRAY_LENGTH][]; 125 main(String args[])126 public static void main(String args[]) throws Exception { 127 if (args.length != 4) { 128 throw new IllegalArgumentException("Expected 4 args: <survivorRatio> <initRatio> <minRatio> <useAdaptiveSizePolicy>"); 129 } 130 final int survivorRatio = Integer.valueOf(args[0]); 131 final int initRatio = Integer.valueOf(args[1]); 132 final int minRatio = Integer.valueOf(args[2]); 133 final boolean useAdaptiveSizePolicy = Boolean.valueOf(args[3]); 134 135 // we stop testing only here to ensure that JVM will accept 136 // both MinSurvivorRatio and InitialSurvivorRatio regardles to GC 137 if (GCTypes.YoungGCType.getYoungGCType() != GCTypes.YoungGCType.PSNew) { 138 System.out.println("Test is only applicable to Parallel GC"); 139 return; 140 } 141 142 // verify initial survivor ratio 143 verifySurvivorRatio(survivorRatio, initRatio, minRatio, useAdaptiveSizePolicy, true); 144 145 // force GC 146 AllocationHelper allocator = new AllocationHelper(MAX_ITERATIONS, ARRAY_LENGTH, CHUNK_SIZE, 147 () -> (verifySurvivorRatio(survivorRatio, initRatio, minRatio, useAdaptiveSizePolicy, false))); 148 allocator.allocateMemoryAndVerify(); 149 } 150 151 /** 152 * Verify actual survivor ratio. 153 * 154 * @param survivorRatio value of SurvivorRatio option, omitted if negative 155 * @param initRatio value of InitialSurvivorRatio option, omitted if negative 156 * @param minRatio value of MinSurvivorRatio option, omitted if negative 157 * @param useAdaptiveSizePolicy value of UseAdaptiveSizePolicy option 158 * @param verifyInitialRatio true if we are going to verify initial ratio 159 */ verifySurvivorRatio(int survivorRatio, int initRatio, int minRatio, boolean useAdaptiveSizePolicy, boolean verifyInitialRatio)160 public static Void verifySurvivorRatio(int survivorRatio, 161 int initRatio, 162 int minRatio, 163 boolean useAdaptiveSizePolicy, 164 boolean verifyInitialRatio) { 165 166 MemoryUsage edenUsage = HeapRegionUsageTool.getEdenUsage(); 167 MemoryUsage survivorUsage = HeapRegionUsageTool.getSurvivorUsage(); 168 169 long alignedNewSize = edenUsage.getMax() + 2 * survivorUsage.getMax(); 170 long generationAlignment = wb.psHeapGenerationAlignment(); 171 172 if (survivorRatio >= 0) { 173 // -XX:SurvivorRatio was passed to JVM, actual ratio should be SurvivorRatio + 2 174 long expectedSize = HeapRegionUsageTool.alignDown(alignedNewSize / (survivorRatio + 2), 175 generationAlignment); 176 177 if (survivorUsage.getCommitted() != expectedSize) { 178 throw new RuntimeException("Expected survivor size is: " + expectedSize 179 + ", but observed size is: " + survivorUsage.getCommitted()); 180 } 181 } else if (verifyInitialRatio || !useAdaptiveSizePolicy) { 182 // In case of initial ratio verification or disabled adaptive size policy 183 // ratio should be equal to InitialSurvivorRatio value 184 long expectedSize = HeapRegionUsageTool.alignDown(alignedNewSize / initRatio, 185 generationAlignment); 186 if (survivorUsage.getCommitted() != expectedSize) { 187 throw new RuntimeException("Expected survivor size is: " + expectedSize 188 + ", but observed size is: " + survivorUsage.getCommitted()); 189 } 190 } else { 191 // In any other case actual survivor ratio should not be lower than MinSurvivorRatio 192 // or is should be equal to InitialSurvivorRatio 193 long expectedMinSize = HeapRegionUsageTool.alignDown(alignedNewSize / minRatio, 194 generationAlignment); 195 long expectedInitSize = HeapRegionUsageTool.alignDown(alignedNewSize / initRatio, 196 generationAlignment); 197 if (survivorUsage.getCommitted() != expectedInitSize 198 && survivorUsage.getCommitted() < expectedMinSize) { 199 throw new RuntimeException("Expected survivor size should be " + expectedMinSize 200 + " or should be greater then " + expectedMinSize 201 + ", but observer survivor size is " + survivorUsage.getCommitted()); 202 } 203 } 204 return null; 205 } 206 } 207 } 208