1 /* 2 * Copyright (c) 2016, 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 TestPLABPromotion 26 * @bug 8141278 27 * @summary Test PLAB promotions 28 * @requires vm.gc=="G1" | vm.gc=="null" 29 * @library /testlibrary /../../test/lib / 30 * @modules java.management 31 * @build ClassFileInstaller 32 * sun.hotspot.WhiteBox 33 * gc.g1.plab.lib.MemoryConsumer 34 * gc.g1.plab.lib.LogParser 35 * gc.g1.plab.lib.AppPLABPromotion 36 * @run main ClassFileInstaller sun.hotspot.WhiteBox 37 * sun.hotspot.WhiteBox$WhiteBoxPermission 38 * @run main gc.g1.plab.TestPLABPromotion 39 */ 40 package gc.g1.plab; 41 42 import java.util.List; 43 import java.util.Map; 44 import java.util.Arrays; 45 import java.io.PrintStream; 46 47 import gc.g1.plab.lib.AppPLABPromotion; 48 import gc.g1.plab.lib.LogParser; 49 import gc.g1.plab.lib.PLABUtils; 50 51 import jdk.test.lib.OutputAnalyzer; 52 import jdk.test.lib.ProcessTools; 53 import jdk.test.lib.Platform; 54 55 /** 56 * Test checks PLAB promotion of different size objects. 57 */ 58 public class TestPLABPromotion { 59 60 // GC ID with survivor PLAB statistics 61 private final static long GC_ID_SURVIVOR_STATS = 1l; 62 // GC ID with old PLAB statistics 63 private final static long GC_ID_OLD_STATS = 2l; 64 65 // Threshold to determine whether the correct amount of objects were promoted. 66 // This is only an approximate threshold for these checks. 67 private final static long MEM_CONSUMPTION_THRESHOLD = 256l * 1024l; 68 69 private static final int PLAB_SIZE_SMALL = 1024; 70 private static final int PLAB_SIZE_MEDIUM = 4096; 71 private static final int PLAB_SIZE_HIGH = 65536; 72 private static final int OBJECT_SIZE_SMALL = 10; 73 private static final int OBJECT_SIZE_MEDIUM = 100; 74 private static final int OBJECT_SIZE_HIGH = 1000; 75 private static final int GC_NUM_SMALL = 1; 76 private static final int GC_NUM_MEDIUM = 3; 77 private static final int GC_NUM_HIGH = 7; 78 private static final int WASTE_PCT_SMALL = 10; 79 private static final int WASTE_PCT_MEDIUM = 20; 80 private static final int WASTE_PCT_HIGH = 30; 81 private static final int YOUNG_SIZE_LOW = 16; 82 private static final int YOUNG_SIZE_HIGH = 64; 83 private static final boolean PLAB_FIXED = true; 84 private static final boolean PLAB_DYNAMIC = false; 85 86 private final static TestCase[] TEST_CASES = { 87 // Test cases for unreachable object, PLAB size is fixed 88 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, false, false), 89 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, false, false), 90 // Test cases for reachable objects, PLAB size is fixed 91 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true), 92 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_MEDIUM, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true), 93 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_FIXED, true, false), 94 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true), 95 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true), 96 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_FIXED, true, true), 97 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_SMALL, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_FIXED, true, true), 98 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_FIXED, true, true), 99 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_SMALL, OBJECT_SIZE_HIGH, GC_NUM_MEDIUM, YOUNG_SIZE_HIGH, PLAB_FIXED, true, false), 100 // Test cases for unreachable object, PLAB size is not fixed 101 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_LOW, PLAB_DYNAMIC, false, false), 102 // Test cases for reachable objects, PLAB size is not fixed 103 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, true), 104 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_MEDIUM, OBJECT_SIZE_SMALL, GC_NUM_SMALL, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true), 105 new TestCase(WASTE_PCT_SMALL, PLAB_SIZE_MEDIUM, OBJECT_SIZE_HIGH, GC_NUM_HIGH, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, false), 106 new TestCase(WASTE_PCT_MEDIUM, PLAB_SIZE_SMALL, OBJECT_SIZE_MEDIUM, GC_NUM_MEDIUM, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true), 107 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_MEDIUM, GC_NUM_SMALL, YOUNG_SIZE_HIGH, PLAB_DYNAMIC, true, true), 108 new TestCase(WASTE_PCT_HIGH, PLAB_SIZE_HIGH, OBJECT_SIZE_SMALL, GC_NUM_HIGH, YOUNG_SIZE_LOW, PLAB_DYNAMIC, true, true) 109 }; 110 111 public static void main(String[] args) throws Throwable { 112 113 for (TestCase testCase : TEST_CASES) { 114 // What we going to check. 115 testCase.print(System.out); 116 List<String> options = PLABUtils.prepareOptions(testCase.toOptions()); 117 options.add(AppPLABPromotion.class.getName()); 118 OutputAnalyzer out = ProcessTools.executeTestJvm(options.toArray(new String[options.size()])); 119 if (out.getExitValue() != 0) { 120 System.out.println(out.getOutput()); 121 throw new RuntimeException("Expect exit code 0."); 122 } 123 checkResults(out.getOutput(), testCase); 124 } 125 } 126 127 private static void checkResults(String output, TestCase testCase) { 128 long plabAllocatedSurvivor; 129 long directAllocatedSurvivor; 130 long plabAllocatedOld; 131 long directAllocatedOld; 132 long memAllocated = testCase.getMemToFill(); 133 long wordSize = Platform.is32bit() ? 4l : 8l; 134 LogParser logParser = new LogParser(output); 135 136 Map<String, Long> survivorStats = getPlabStats(logParser, LogParser.ReportType.SURVIVOR_STATS, GC_ID_SURVIVOR_STATS); 137 Map<String, Long> oldStats = getPlabStats(logParser, LogParser.ReportType.OLD_STATS, GC_ID_OLD_STATS); 138 139 plabAllocatedSurvivor = wordSize * survivorStats.get("used"); 140 directAllocatedSurvivor = wordSize * survivorStats.get("direct_allocated"); 141 plabAllocatedOld = wordSize * oldStats.get("used"); 142 directAllocatedOld = wordSize * oldStats.get("direct_allocated"); 143 144 System.out.printf("Survivor PLAB allocated:%17d Direct allocated: %17d Mem consumed:%17d%n", plabAllocatedSurvivor, directAllocatedSurvivor, memAllocated); 145 System.out.printf("Old PLAB allocated:%17d Direct allocated: %17d Mem consumed:%17d%n", plabAllocatedOld, directAllocatedOld, memAllocated); 146 147 System.out.println(" " + plabAllocatedSurvivor + " " + directAllocatedSurvivor + " " + plabAllocatedOld + " " + directAllocatedOld + " " + memAllocated); 148 System.out.println(" " + (memAllocated - plabAllocatedSurvivor)); 149 System.out.println(" " + (memAllocated - directAllocatedSurvivor)); 150 System.out.println(" " + (memAllocated - plabAllocatedOld)); 151 System.out.println(" " + (memAllocated - directAllocatedOld)); 152 153 // Unreachable objects case 154 if (testCase.isDeadObjectCase()) { 155 // No dead objects should be promoted 156 if (plabAllocatedSurvivor > MEM_CONSUMPTION_THRESHOLD || directAllocatedSurvivor > MEM_CONSUMPTION_THRESHOLD) { 157 System.out.println(output); 158 throw new RuntimeException("Unreachable objects should not be allocated using PLAB or direct allocated to Survivor"); 159 } 160 if (plabAllocatedOld > MEM_CONSUMPTION_THRESHOLD || directAllocatedOld > MEM_CONSUMPTION_THRESHOLD) { 161 System.out.println(output); 162 throw new RuntimeException("Unreachable objects should not be allocated using PLAB or direct allocated to Old"); 163 } 164 } else { 165 // Live objects case 166 if (testCase.isPromotedByPLAB()) { 167 // All live small objects should be promoted using PLAB 168 if (Math.abs(plabAllocatedSurvivor - memAllocated) > MEM_CONSUMPTION_THRESHOLD) { 169 System.out.println(output); 170 throw new RuntimeException("Expect that Survivor PLAB allocation are similar to all mem consumed"); 171 } 172 if (Math.abs(plabAllocatedOld - memAllocated) > MEM_CONSUMPTION_THRESHOLD) { 173 System.out.println(output); 174 throw new RuntimeException("Expect that Old PLAB allocation are similar to all mem consumed"); 175 } 176 } else { 177 // All big objects should be directly allocated 178 if (Math.abs(directAllocatedSurvivor - memAllocated) > MEM_CONSUMPTION_THRESHOLD) { 179 System.out.println(output); 180 throw new RuntimeException("Test fails. Expect that Survivor direct allocation are similar to all mem consumed"); 181 } 182 if (Math.abs(directAllocatedOld - memAllocated) > MEM_CONSUMPTION_THRESHOLD) { 183 System.out.println(output); 184 throw new RuntimeException("Test fails. Expect that Old direct allocation are similar to all mem consumed"); 185 } 186 } 187 188 // All promoted objects size should be similar to all consumed memory 189 if (Math.abs(plabAllocatedSurvivor + directAllocatedSurvivor - memAllocated) > MEM_CONSUMPTION_THRESHOLD) { 190 System.out.println(output); 191 throw new RuntimeException("Test fails. Expect that Survivor gen total allocation are similar to all mem consumed"); 192 } 193 if (Math.abs(plabAllocatedOld + directAllocatedOld - memAllocated) > MEM_CONSUMPTION_THRESHOLD) { 194 System.out.println(output); 195 throw new RuntimeException("Test fails. Expect that Old gen total allocation are similar to all mem consumed"); 196 } 197 } 198 System.out.println("Test passed!"); 199 } 200 201 private static Map<String, Long> getPlabStats(LogParser logParser, LogParser.ReportType type, long gc_id) { 202 203 Map<String, Long> survivorStats = logParser.getEntries() 204 .get(gc_id) 205 .get(type); 206 return survivorStats; 207 } 208 209 /** 210 * Description of one test case. 211 */ 212 private static class TestCase { 213 214 private final int wastePct; 215 private final int plabSize; 216 private final int chunkSize; 217 private final int parGCThreads; 218 private final int edenSize; 219 private final boolean plabIsFixed; 220 private final boolean objectsAreReachable; 221 private final boolean promotedByPLAB; 222 223 /** 224 * @param wastePct 225 * ParallelGCBufferWastePct 226 * @param plabSize 227 * -XX:OldPLABSize and -XX:YoungPLABSize 228 * @param chunkSize 229 * requested object size for memory consumption 230 * @param parGCThreads 231 * -XX:ParallelGCThreads 232 * @param edenSize 233 * NewSize and MaxNewSize 234 * @param plabIsFixed 235 * Use dynamic PLAB or fixed size PLAB 236 * @param objectsAreReachable 237 * true - allocate live objects 238 * false - allocate unreachable objects 239 * @param promotedByPLAB 240 * true - we expect to see PLAB allocation during promotion 241 * false - objects will be directly allocated during promotion 242 */ 243 public TestCase(int wastePct, 244 int plabSize, 245 int chunkSize, 246 int parGCThreads, 247 int edenSize, 248 boolean plabIsFixed, 249 boolean objectsAreReachable, 250 boolean promotedByPLAB 251 ) { 252 if (wastePct == 0 || plabSize == 0 || chunkSize == 0 || parGCThreads == 0 || edenSize == 0) { 253 throw new IllegalArgumentException("Parameters should not be 0"); 254 } 255 this.wastePct = wastePct; 256 this.plabSize = plabSize; 257 this.chunkSize = chunkSize; 258 this.parGCThreads = parGCThreads; 259 this.edenSize = edenSize; 260 this.plabIsFixed = plabIsFixed; 261 this.objectsAreReachable = objectsAreReachable; 262 this.promotedByPLAB = promotedByPLAB; 263 } 264 265 /** 266 * Convert current TestCase to List of options. 267 * Assume test will fill half of existed eden. 268 * 269 * @return 270 * List of options 271 */ 272 public List<String> toOptions() { 273 return Arrays.asList("-XX:ParallelGCThreads=" + parGCThreads, 274 "-XX:ParallelGCBufferWastePct=" + wastePct, 275 "-XX:OldPLABSize=" + plabSize, 276 "-XX:YoungPLABSize=" + plabSize, 277 "-XX:" + (plabIsFixed ? "-" : "+") + "ResizePLAB", 278 "-Dchunk.size=" + chunkSize, 279 "-Dreachable=" + objectsAreReachable, 280 "-XX:NewSize=" + edenSize + "m", 281 "-XX:MaxNewSize=" + edenSize + "m", 282 "-Dmem.to.fill=" + getMemToFill() 283 ); 284 } 285 286 /** 287 * Print details about test case. 288 */ 289 public void print(PrintStream out) { 290 boolean expectPLABAllocation = promotedByPLAB && objectsAreReachable; 291 boolean expectDirectAllocation = (!promotedByPLAB) && objectsAreReachable; 292 293 out.println("Test case details:"); 294 out.println(" Young gen size : " + edenSize + "M"); 295 out.println(" Predefined PLAB size : " + plabSize); 296 out.println(" Parallel GC buffer waste pct : " + wastePct); 297 out.println(" Chunk size : " + chunkSize); 298 out.println(" Parallel GC threads : " + parGCThreads); 299 out.println(" Objects are created : " + (objectsAreReachable ? "reachable" : "unreachable")); 300 out.println(" PLAB size is fixed: " + (plabIsFixed ? "yes" : "no")); 301 out.println("Test expectations:"); 302 out.println(" PLAB allocation : " + (expectPLABAllocation ? "expected" : "unexpected")); 303 out.println(" Direct allocation : " + (expectDirectAllocation ? "expected" : "unexpected")); 304 } 305 306 /** 307 * @return 308 * true if we expect PLAB allocation 309 * false if no 310 */ 311 public boolean isPromotedByPLAB() { 312 return promotedByPLAB; 313 } 314 315 /** 316 * @return 317 * true if it is test case for unreachable objects 318 * false for live objects 319 */ 320 public boolean isDeadObjectCase() { 321 return !objectsAreReachable; 322 } 323 324 /** 325 * Returns amount of memory to fill 326 * 327 * @return amount of memory 328 */ 329 public long getMemToFill() { 330 return (long) (edenSize) * 1024l * 1024l / 2; 331 } 332 } 333 }