Mercurial > hg > truffle
annotate test/gc/g1/TestStringDeduplicationTools.java @ 17840:fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
Reviewed-by: jmasa, sjohanss
| author | pliden |
|---|---|
| date | Thu, 03 Apr 2014 10:39:27 +0200 |
| parents | 595c0f60d50d |
| children | 660b3f6bf7d7 |
| rev | line source |
|---|---|
| 17764 | 1 /* |
| 2 * Copyright (c) 2014, 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 * Common code for string deduplication tests | |
| 26 */ | |
| 27 | |
| 28 import java.lang.management.*; | |
| 29 import java.lang.reflect.*; | |
| 30 import java.security.*; | |
| 31 import java.util.*; | |
| 32 import com.oracle.java.testlibrary.*; | |
| 33 import sun.misc.*; | |
| 34 | |
| 35 class TestStringDeduplicationTools { | |
| 36 private static final String YoungGC = "YoungGC"; | |
| 37 private static final String FullGC = "FullGC"; | |
| 38 | |
| 39 private static final int Xmn = 50; // MB | |
| 40 private static final int Xms = 100; // MB | |
| 41 private static final int Xmx = 100; // MB | |
| 42 private static final int MB = 1024 * 1024; | |
| 43 private static final int StringLength = 50; | |
| 44 | |
| 45 private static Field valueField; | |
| 46 private static Unsafe unsafe; | |
| 47 private static byte[] dummy; | |
| 48 | |
| 49 static { | |
| 50 try { | |
| 51 Field field = Unsafe.class.getDeclaredField("theUnsafe"); | |
| 52 field.setAccessible(true); | |
| 53 unsafe = (Unsafe)field.get(null); | |
| 54 | |
| 55 valueField = String.class.getDeclaredField("value"); | |
| 56 valueField.setAccessible(true); | |
| 57 } catch (Exception e) { | |
| 58 throw new RuntimeException(e); | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 private static Object getValue(String string) { | |
| 63 try { | |
| 64 return valueField.get(string); | |
| 65 } catch (Exception e) { | |
| 66 throw new RuntimeException(e); | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 private static void doFullGc(int numberOfTimes) { | |
| 71 for (int i = 0; i < numberOfTimes; i++) { | |
| 72 System.out.println("Begin: Full GC " + (i + 1) + "/" + numberOfTimes); | |
| 73 System.gc(); | |
| 74 System.out.println("End: Full GC " + (i + 1) + "/" + numberOfTimes); | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 private static void doYoungGc(int numberOfTimes) { | |
| 79 // Provoke at least numberOfTimes young GCs | |
| 80 final int objectSize = 128; | |
| 81 final int maxObjectInYoung = (Xmn * MB) / objectSize; | |
| 82 for (int i = 0; i < numberOfTimes; i++) { | |
| 83 System.out.println("Begin: Young GC " + (i + 1) + "/" + numberOfTimes); | |
| 84 for (int j = 0; j < maxObjectInYoung + 1; j++) { | |
| 85 dummy = new byte[objectSize]; | |
| 86 } | |
| 87 System.out.println("End: Young GC " + (i + 1) + "/" + numberOfTimes); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 private static void forceDeduplication(int ageThreshold, String gcType) { | |
| 92 // Force deduplication to happen by either causing a FullGC or a YoungGC. | |
| 93 // We do several collections to also provoke a situation where the the | |
| 94 // deduplication thread needs to yield while processing the queue. This | |
| 95 // also tests that the references in the deduplication queue are adjusted | |
| 96 // accordingly. | |
| 97 if (gcType.equals(FullGC)) { | |
| 98 doFullGc(3); | |
| 99 } else { | |
| 100 doYoungGc(ageThreshold + 3); | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 private static String generateString(int id) { | |
| 105 StringBuilder builder = new StringBuilder(StringLength); | |
| 106 | |
| 107 builder.append("DeduplicationTestString:" + id + ":"); | |
| 108 | |
| 109 while (builder.length() < StringLength) { | |
| 110 builder.append('X'); | |
| 111 } | |
| 112 | |
| 113 return builder.toString(); | |
| 114 } | |
| 115 | |
| 116 private static ArrayList<String> createStrings(int total, int unique) { | |
| 117 System.out.println("Creating strings: total=" + total + ", unique=" + unique); | |
| 118 if (total % unique != 0) { | |
| 119 throw new RuntimeException("Total must be divisible by unique"); | |
| 120 } | |
| 121 | |
| 122 ArrayList<String> list = new ArrayList<String>(total); | |
| 123 for (int j = 0; j < total / unique; j++) { | |
| 124 for (int i = 0; i < unique; i++) { | |
| 125 list.add(generateString(i)); | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 return list; | |
| 130 } | |
| 131 | |
| 132 private static void verifyStrings(ArrayList<String> list, int uniqueExpected) { | |
| 133 for (;;) { | |
| 134 // Check number of deduplicated strings | |
| 135 ArrayList<Object> unique = new ArrayList<Object>(uniqueExpected); | |
| 136 for (String string: list) { | |
| 137 Object value = getValue(string); | |
| 138 boolean uniqueValue = true; | |
| 139 for (Object obj: unique) { | |
| 140 if (obj == value) { | |
| 141 uniqueValue = false; | |
| 142 break; | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 if (uniqueValue) { | |
| 147 unique.add(value); | |
| 148 } | |
| 149 } | |
| 150 | |
| 151 System.out.println("Verifying strings: total=" + list.size() + | |
| 152 ", uniqueFound=" + unique.size() + | |
| 153 ", uniqueExpected=" + uniqueExpected); | |
| 154 | |
| 155 if (unique.size() == uniqueExpected) { | |
| 156 System.out.println("Deduplication completed"); | |
| 157 break; | |
| 158 } else { | |
| 159 System.out.println("Deduplication not completed, waiting..."); | |
| 160 | |
| 161 // Give the deduplication thread time to complete | |
| 162 try { | |
| 163 Thread.sleep(1000); | |
| 164 } catch (Exception e) { | |
| 165 throw new RuntimeException(e); | |
| 166 } | |
| 167 } | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 private static OutputAnalyzer runTest(String... extraArgs) throws Exception { | |
| 172 String[] defaultArgs = new String[] { | |
| 173 "-Xmn" + Xmn + "m", | |
| 174 "-Xms" + Xms + "m", | |
| 175 "-Xmx" + Xmx + "m", | |
| 176 "-XX:+UseG1GC", | |
| 177 "-XX:+UnlockDiagnosticVMOptions", | |
| 178 "-XX:+VerifyAfterGC" // Always verify after GC | |
| 179 }; | |
| 180 | |
| 181 ArrayList<String> args = new ArrayList<String>(); | |
| 182 args.addAll(Arrays.asList(defaultArgs)); | |
| 183 args.addAll(Arrays.asList(extraArgs)); | |
| 184 | |
| 185 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[args.size()])); | |
| 186 OutputAnalyzer output = new OutputAnalyzer(pb.start()); | |
| 187 System.err.println(output.getStderr()); | |
| 188 System.out.println(output.getStdout()); | |
| 189 return output; | |
| 190 } | |
| 191 | |
| 192 private static class DeduplicationTest { | |
| 193 public static void main(String[] args) { | |
| 194 System.out.println("Begin: DeduplicationTest"); | |
| 195 | |
| 196 final int numberOfStrings = Integer.parseUnsignedInt(args[0]); | |
| 197 final int numberOfUniqueStrings = Integer.parseUnsignedInt(args[1]); | |
| 198 final int ageThreshold = Integer.parseUnsignedInt(args[2]); | |
| 199 final String gcType = args[3]; | |
| 200 | |
| 201 ArrayList<String> list = createStrings(numberOfStrings, numberOfUniqueStrings); | |
| 202 forceDeduplication(ageThreshold, gcType); | |
| 203 verifyStrings(list, numberOfUniqueStrings); | |
| 204 | |
| 205 System.out.println("End: DeduplicationTest"); | |
| 206 } | |
| 207 | |
| 208 public static OutputAnalyzer run(int numberOfStrings, int ageThreshold, String gcType, String... extraArgs) throws Exception { | |
| 209 String[] defaultArgs = new String[] { | |
| 210 "-XX:+UseStringDeduplication", | |
| 211 "-XX:StringDeduplicationAgeThreshold=" + ageThreshold, | |
| 212 DeduplicationTest.class.getName(), | |
| 213 "" + numberOfStrings, | |
| 214 "" + numberOfStrings / 2, | |
| 215 "" + ageThreshold, | |
| 216 gcType | |
| 217 }; | |
| 218 | |
| 219 ArrayList<String> args = new ArrayList<String>(); | |
| 220 args.addAll(Arrays.asList(extraArgs)); | |
| 221 args.addAll(Arrays.asList(defaultArgs)); | |
| 222 | |
| 223 return runTest(args.toArray(new String[args.size()])); | |
| 224 } | |
| 225 } | |
| 226 | |
| 227 private static class InternedTest { | |
| 228 public static void main(String[] args) { | |
| 229 // This test verifies that interned strings are always | |
| 230 // deduplicated when being interned, and never after | |
| 231 // being interned. | |
| 232 | |
| 233 System.out.println("Begin: InternedTest"); | |
| 234 | |
| 235 final int ageThreshold = Integer.parseUnsignedInt(args[0]); | |
| 236 final String baseString = "DeduplicationTestString:" + InternedTest.class.getName(); | |
| 237 | |
| 238 // Create duplicate of baseString | |
| 239 StringBuilder sb1 = new StringBuilder(baseString); | |
| 240 String dupString1 = sb1.toString(); | |
| 241 if (getValue(dupString1) == getValue(baseString)) { | |
| 242 throw new RuntimeException("Values should not match"); | |
| 243 } | |
| 244 | |
| 245 // Force baseString to be inspected for deduplication | |
| 246 // and be inserted into the deduplication hashtable. | |
| 247 forceDeduplication(ageThreshold, FullGC); | |
| 248 | |
| 249 // Wait for deduplication to occur | |
| 250 while (getValue(dupString1) != getValue(baseString)) { | |
| 251 System.out.println("Waiting..."); | |
| 252 try { | |
| 253 Thread.sleep(100); | |
| 254 } catch (Exception e) { | |
| 255 throw new RuntimeException(e); | |
| 256 } | |
| 257 } | |
| 258 | |
| 259 // Create a new duplicate of baseString | |
| 260 StringBuilder sb2 = new StringBuilder(baseString); | |
| 261 String dupString2 = sb2.toString(); | |
| 262 if (getValue(dupString2) == getValue(baseString)) { | |
| 263 throw new RuntimeException("Values should not match"); | |
| 264 } | |
| 265 | |
| 266 // Intern the new duplicate | |
| 267 Object beforeInternedValue = getValue(dupString2); | |
| 268 String internedString = dupString2.intern(); | |
| 269 if (internedString != dupString2) { | |
| 270 throw new RuntimeException("String should match"); | |
| 271 } | |
| 272 if (getValue(internedString) != getValue(baseString)) { | |
| 273 throw new RuntimeException("Values should match"); | |
| 274 } | |
| 275 | |
| 276 // Check original value of interned string, to make sure | |
| 277 // deduplication happened on the interned string and not | |
| 278 // on the base string | |
| 279 if (beforeInternedValue == getValue(baseString)) { | |
| 280 throw new RuntimeException("Values should not match"); | |
| 281 } | |
| 282 | |
| 283 System.out.println("End: InternedTest"); | |
| 284 } | |
| 285 | |
| 286 public static OutputAnalyzer run() throws Exception { | |
| 287 return runTest("-XX:+PrintGC", | |
| 288 "-XX:+PrintGCDetails", | |
| 289 "-XX:+UseStringDeduplication", | |
| 290 "-XX:+PrintStringDeduplicationStatistics", | |
| 291 "-XX:StringDeduplicationAgeThreshold=" + DefaultAgeThreshold, | |
| 292 InternedTest.class.getName(), | |
| 293 "" + DefaultAgeThreshold); | |
| 294 } | |
| 295 } | |
| 296 | |
| 297 private static class MemoryUsageTest { | |
| 298 public static void main(String[] args) { | |
| 299 System.out.println("Begin: MemoryUsageTest"); | |
| 300 | |
| 301 final boolean useStringDeduplication = Boolean.parseBoolean(args[0]); | |
| 302 final int numberOfStrings = LargeNumberOfStrings; | |
| 303 final int numberOfUniqueStrings = 1; | |
| 304 | |
| 305 ArrayList<String> list = createStrings(numberOfStrings, numberOfUniqueStrings); | |
| 306 forceDeduplication(DefaultAgeThreshold, FullGC); | |
| 307 | |
| 308 if (useStringDeduplication) { | |
| 309 verifyStrings(list, numberOfUniqueStrings); | |
| 310 } | |
| 311 | |
| 312 System.gc(); | |
|
17840
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
313 |
| 17764 | 314 System.out.println("Heap Memory Usage: " + ManagementFactory.getMemoryMXBean().getHeapMemoryUsage().getUsed()); |
|
17840
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
315 System.out.println("Array Header Size: " + unsafe.ARRAY_CHAR_BASE_OFFSET); |
| 17764 | 316 |
| 317 System.out.println("End: MemoryUsageTest"); | |
| 318 } | |
| 319 | |
| 320 public static OutputAnalyzer run(boolean useStringDeduplication) throws Exception { | |
| 321 String[] extraArgs = new String[0]; | |
| 322 | |
| 323 if (useStringDeduplication) { | |
| 324 extraArgs = new String[] { | |
| 325 "-XX:+UseStringDeduplication", | |
| 326 "-XX:+PrintStringDeduplicationStatistics", | |
| 327 "-XX:StringDeduplicationAgeThreshold=" + DefaultAgeThreshold | |
| 328 }; | |
| 329 } | |
| 330 | |
| 331 String[] defaultArgs = new String[] { | |
| 332 "-XX:+PrintGC", | |
| 333 "-XX:+PrintGCDetails", | |
| 334 MemoryUsageTest.class.getName(), | |
| 335 "" + useStringDeduplication | |
| 336 }; | |
| 337 | |
| 338 ArrayList<String> args = new ArrayList<String>(); | |
| 339 args.addAll(Arrays.asList(extraArgs)); | |
| 340 args.addAll(Arrays.asList(defaultArgs)); | |
| 341 | |
| 342 return runTest(args.toArray(new String[args.size()])); | |
| 343 } | |
| 344 } | |
| 345 | |
| 346 /* | |
| 347 * Tests | |
| 348 */ | |
| 349 | |
| 350 private static final int LargeNumberOfStrings = 10000; | |
| 351 private static final int SmallNumberOfStrings = 10; | |
| 352 | |
| 353 private static final int MaxAgeThreshold = 15; | |
| 354 private static final int DefaultAgeThreshold = 3; | |
| 355 private static final int MinAgeThreshold = 1; | |
| 356 | |
| 357 private static final int TooLowAgeThreshold = MinAgeThreshold - 1; | |
| 358 private static final int TooHighAgeThreshold = MaxAgeThreshold + 1; | |
| 359 | |
| 360 public static void testYoungGC() throws Exception { | |
| 361 // Do young GC to age strings to provoke deduplication | |
| 362 OutputAnalyzer output = DeduplicationTest.run(LargeNumberOfStrings, | |
| 363 DefaultAgeThreshold, | |
| 364 YoungGC, | |
| 365 "-XX:+PrintGC", | |
| 366 "-XX:+PrintStringDeduplicationStatistics"); | |
| 367 output.shouldNotContain("Full GC"); | |
| 368 output.shouldContain("GC pause (G1 Evacuation Pause) (young)"); | |
| 369 output.shouldContain("GC concurrent-string-deduplication"); | |
| 370 output.shouldContain("Deduplicated:"); | |
| 371 output.shouldHaveExitValue(0); | |
| 372 } | |
| 373 | |
| 374 public static void testFullGC() throws Exception { | |
| 375 // Do full GC to age strings to provoke deduplication | |
| 376 OutputAnalyzer output = DeduplicationTest.run(LargeNumberOfStrings, | |
| 377 DefaultAgeThreshold, | |
| 378 FullGC, | |
| 379 "-XX:+PrintGC", | |
| 380 "-XX:+PrintStringDeduplicationStatistics"); | |
| 381 output.shouldNotContain("GC pause (G1 Evacuation Pause) (young)"); | |
| 382 output.shouldContain("Full GC"); | |
| 383 output.shouldContain("GC concurrent-string-deduplication"); | |
| 384 output.shouldContain("Deduplicated:"); | |
| 385 output.shouldHaveExitValue(0); | |
| 386 } | |
| 387 | |
| 388 public static void testTableResize() throws Exception { | |
| 389 // Test with StringDeduplicationResizeALot | |
| 390 OutputAnalyzer output = DeduplicationTest.run(LargeNumberOfStrings, | |
| 391 DefaultAgeThreshold, | |
| 392 YoungGC, | |
| 393 "-XX:+PrintGC", | |
| 394 "-XX:+PrintStringDeduplicationStatistics", | |
| 395 "-XX:+StringDeduplicationResizeALot"); | |
| 396 output.shouldContain("GC concurrent-string-deduplication"); | |
| 397 output.shouldContain("Deduplicated:"); | |
| 398 output.shouldNotContain("Resize Count: 0"); | |
| 399 output.shouldHaveExitValue(0); | |
| 400 } | |
| 401 | |
| 402 public static void testTableRehash() throws Exception { | |
| 403 // Test with StringDeduplicationRehashALot | |
| 404 OutputAnalyzer output = DeduplicationTest.run(LargeNumberOfStrings, | |
| 405 DefaultAgeThreshold, | |
| 406 YoungGC, | |
| 407 "-XX:+PrintGC", | |
| 408 "-XX:+PrintStringDeduplicationStatistics", | |
| 409 "-XX:+StringDeduplicationRehashALot"); | |
| 410 output.shouldContain("GC concurrent-string-deduplication"); | |
| 411 output.shouldContain("Deduplicated:"); | |
| 412 output.shouldNotContain("Rehash Count: 0"); | |
| 413 output.shouldNotContain("Hash Seed: 0x0"); | |
| 414 output.shouldHaveExitValue(0); | |
| 415 } | |
| 416 | |
| 417 public static void testAgeThreshold() throws Exception { | |
| 418 OutputAnalyzer output; | |
| 419 | |
| 420 // Test with max age theshold | |
| 421 output = DeduplicationTest.run(SmallNumberOfStrings, | |
| 422 MaxAgeThreshold, | |
| 423 YoungGC, | |
| 424 "-XX:+PrintGC", | |
| 425 "-XX:+PrintStringDeduplicationStatistics"); | |
| 426 output.shouldContain("GC concurrent-string-deduplication"); | |
| 427 output.shouldContain("Deduplicated:"); | |
| 428 output.shouldHaveExitValue(0); | |
| 429 | |
| 430 // Test with min age theshold | |
| 431 output = DeduplicationTest.run(SmallNumberOfStrings, | |
| 432 MinAgeThreshold, | |
| 433 YoungGC, | |
| 434 "-XX:+PrintGC", | |
| 435 "-XX:+PrintStringDeduplicationStatistics"); | |
| 436 output.shouldContain("GC concurrent-string-deduplication"); | |
| 437 output.shouldContain("Deduplicated:"); | |
| 438 output.shouldHaveExitValue(0); | |
| 439 | |
| 440 // Test with too low age threshold | |
| 441 output = DeduplicationTest.run(SmallNumberOfStrings, | |
| 442 TooLowAgeThreshold, | |
| 443 YoungGC); | |
| 444 output.shouldContain("StringDeduplicationAgeThreshold of " + TooLowAgeThreshold + | |
| 445 " is invalid; must be between " + MinAgeThreshold + " and " + MaxAgeThreshold); | |
| 446 output.shouldHaveExitValue(1); | |
| 447 | |
| 448 // Test with too high age threshold | |
| 449 output = DeduplicationTest.run(SmallNumberOfStrings, | |
| 450 TooHighAgeThreshold, | |
| 451 YoungGC); | |
| 452 output.shouldContain("StringDeduplicationAgeThreshold of " + TooHighAgeThreshold + | |
| 453 " is invalid; must be between " + MinAgeThreshold + " and " + MaxAgeThreshold); | |
| 454 output.shouldHaveExitValue(1); | |
| 455 } | |
| 456 | |
| 457 public static void testPrintOptions() throws Exception { | |
| 458 OutputAnalyzer output; | |
| 459 | |
| 460 // Test without PrintGC and without PrintStringDeduplicationStatistics | |
| 461 output = DeduplicationTest.run(SmallNumberOfStrings, | |
| 462 DefaultAgeThreshold, | |
| 463 YoungGC); | |
| 464 output.shouldNotContain("GC concurrent-string-deduplication"); | |
| 465 output.shouldNotContain("Deduplicated:"); | |
| 466 output.shouldHaveExitValue(0); | |
| 467 | |
| 468 // Test with PrintGC but without PrintStringDeduplicationStatistics | |
| 469 output = DeduplicationTest.run(SmallNumberOfStrings, | |
| 470 DefaultAgeThreshold, | |
| 471 YoungGC, | |
| 472 "-XX:+PrintGC"); | |
| 473 output.shouldContain("GC concurrent-string-deduplication"); | |
| 474 output.shouldNotContain("Deduplicated:"); | |
| 475 output.shouldHaveExitValue(0); | |
| 476 } | |
| 477 | |
| 478 public static void testInterned() throws Exception { | |
| 479 // Test that interned strings are deduplicated before being interned | |
| 480 OutputAnalyzer output = InternedTest.run(); | |
| 481 output.shouldHaveExitValue(0); | |
| 482 } | |
| 483 | |
| 484 public static void testMemoryUsage() throws Exception { | |
| 485 // Test that memory usage is reduced after deduplication | |
| 486 OutputAnalyzer output; | |
|
17840
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
487 final String heapMemoryUsagePattern = "Heap Memory Usage: (\\d+)"; |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
488 final String arrayHeaderSizePattern = "Array Header Size: (\\d+)"; |
| 17764 | 489 |
| 490 // Run without deduplication | |
| 491 output = MemoryUsageTest.run(false); | |
| 492 output.shouldHaveExitValue(0); | |
|
17840
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
493 final long heapMemoryUsageWithoutDedup = Long.parseLong(output.firstMatch(heapMemoryUsagePattern, 1)); |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
494 final long arrayHeaderSizeWithoutDedup = Long.parseLong(output.firstMatch(arrayHeaderSizePattern, 1)); |
| 17764 | 495 |
| 496 // Run with deduplication | |
| 497 output = MemoryUsageTest.run(true); | |
| 498 output.shouldHaveExitValue(0); | |
|
17840
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
499 final long heapMemoryUsageWithDedup = Long.parseLong(output.firstMatch(heapMemoryUsagePattern, 1)); |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
500 final long arrayHeaderSizeWithDedup = Long.parseLong(output.firstMatch(arrayHeaderSizePattern, 1)); |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
501 |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
502 // Sanity check to make sure one instance isn't using compressed class pointers and the other not |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
503 if (arrayHeaderSizeWithoutDedup != arrayHeaderSizeWithDedup) { |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
504 throw new Exception("Unexpected difference between array header sizes"); |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
505 } |
| 17764 | 506 |
| 507 // Calculate expected memory usage with deduplication enabled. This calculation does | |
| 508 // not take alignment and padding into account, so it's a conservative estimate. | |
|
17840
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
509 final long sizeOfChar = unsafe.ARRAY_CHAR_INDEX_SCALE; |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
510 final long sizeOfCharArray = StringLength * sizeOfChar + arrayHeaderSizeWithoutDedup; |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
511 final long bytesSaved = (LargeNumberOfStrings - 1) * sizeOfCharArray; |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
512 final long heapMemoryUsageWithDedupExpected = heapMemoryUsageWithoutDedup - bytesSaved; |
| 17764 | 513 |
| 514 System.out.println("Memory usage summary:"); | |
|
17840
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
515 System.out.println(" heapMemoryUsageWithoutDedup: " + heapMemoryUsageWithoutDedup); |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
516 System.out.println(" heapMemoryUsageWithDedup: " + heapMemoryUsageWithDedup); |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
517 System.out.println(" heapMemoryUsageWithDedupExpected: " + heapMemoryUsageWithDedupExpected); |
| 17764 | 518 |
|
17840
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
519 if (heapMemoryUsageWithDedup > heapMemoryUsageWithDedupExpected) { |
|
fd8ddf2d2f6b
8038461: Test gc/g1/TestStringDeduplicationMemoryUsage.java fails with unexpected memory usage
pliden
parents:
17764
diff
changeset
|
520 throw new Exception("Unexpected memory usage, heapMemoryUsageWithDedup should be less or equal to heapMemoryUsageWithDedupExpected"); |
| 17764 | 521 } |
| 522 } | |
| 523 } |