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--- old/src/share/vm/runtime/globals.hpp
+++ new/src/share/vm/runtime/globals.hpp
1 1 /*
2 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 21 * have any questions.
22 22 *
23 23 */
24 24
25 25 #if !defined(COMPILER1) && !defined(COMPILER2)
26 26 define_pd_global(bool, BackgroundCompilation, false);
27 27 define_pd_global(bool, UseTLAB, false);
28 28 define_pd_global(bool, CICompileOSR, false);
29 29 define_pd_global(bool, UseTypeProfile, false);
30 30 define_pd_global(bool, UseOnStackReplacement, false);
31 31 define_pd_global(bool, InlineIntrinsics, false);
32 32 define_pd_global(bool, PreferInterpreterNativeStubs, true);
33 33 define_pd_global(bool, ProfileInterpreter, false);
34 34 define_pd_global(bool, ProfileTraps, false);
35 35 define_pd_global(bool, TieredCompilation, false);
36 36
37 37 define_pd_global(intx, CompileThreshold, 0);
38 38 define_pd_global(intx, Tier2CompileThreshold, 0);
39 39 define_pd_global(intx, Tier3CompileThreshold, 0);
40 40 define_pd_global(intx, Tier4CompileThreshold, 0);
41 41
42 42 define_pd_global(intx, BackEdgeThreshold, 0);
43 43 define_pd_global(intx, Tier2BackEdgeThreshold, 0);
44 44 define_pd_global(intx, Tier3BackEdgeThreshold, 0);
45 45 define_pd_global(intx, Tier4BackEdgeThreshold, 0);
46 46
47 47 define_pd_global(intx, OnStackReplacePercentage, 0);
48 48 define_pd_global(bool, ResizeTLAB, false);
49 49 define_pd_global(intx, FreqInlineSize, 0);
50 50 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
51 51 define_pd_global(intx, NewRatio, 4);
52 52 define_pd_global(intx, InlineClassNatives, true);
53 53 define_pd_global(intx, InlineUnsafeOps, true);
54 54 define_pd_global(intx, InitialCodeCacheSize, 160*K);
55 55 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
56 56 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
57 57 define_pd_global(intx, CodeCacheMinBlockLength, 1);
58 58 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M));
59 59 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
60 60 define_pd_global(bool, NeverActAsServerClassMachine, true);
61 61 define_pd_global(uintx, DefaultMaxRAM, 1*G);
62 62 #define CI_COMPILER_COUNT 0
63 63 #else
64 64
65 65 #ifdef COMPILER2
66 66 #define CI_COMPILER_COUNT 2
67 67 #else
68 68 #define CI_COMPILER_COUNT 1
69 69 #endif // COMPILER2
70 70
71 71 #endif // no compilers
72 72
73 73
74 74 // string type aliases used only in this file
75 75 typedef const char* ccstr;
76 76 typedef const char* ccstrlist; // represents string arguments which accumulate
77 77
78 78 enum FlagValueOrigin {
79 79 DEFAULT = 0,
80 80 COMMAND_LINE = 1,
81 81 ENVIRON_VAR = 2,
82 82 CONFIG_FILE = 3,
83 83 MANAGEMENT = 4,
84 84 ERGONOMIC = 5,
85 85 ATTACH_ON_DEMAND = 6,
86 86 INTERNAL = 99
87 87 };
88 88
89 89 struct Flag {
90 90 const char *type;
91 91 const char *name;
92 92 void* addr;
93 93 const char *kind;
94 94 FlagValueOrigin origin;
95 95
96 96 // points to all Flags static array
97 97 static Flag *flags;
98 98
99 99 // number of flags
100 100 static size_t numFlags;
101 101
102 102 static Flag* find_flag(char* name, size_t length);
103 103
104 104 bool is_bool() const { return strcmp(type, "bool") == 0; }
105 105 bool get_bool() const { return *((bool*) addr); }
106 106 void set_bool(bool value) { *((bool*) addr) = value; }
107 107
108 108 bool is_intx() const { return strcmp(type, "intx") == 0; }
109 109 intx get_intx() const { return *((intx*) addr); }
110 110 void set_intx(intx value) { *((intx*) addr) = value; }
111 111
112 112 bool is_uintx() const { return strcmp(type, "uintx") == 0; }
113 113 uintx get_uintx() const { return *((uintx*) addr); }
114 114 void set_uintx(uintx value) { *((uintx*) addr) = value; }
115 115
116 116 bool is_double() const { return strcmp(type, "double") == 0; }
117 117 double get_double() const { return *((double*) addr); }
118 118 void set_double(double value) { *((double*) addr) = value; }
119 119
120 120 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
121 121 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
122 122 ccstr get_ccstr() const { return *((ccstr*) addr); }
123 123 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
124 124
125 125 bool is_unlocker() const;
126 126 bool is_unlocked() const;
127 127 bool is_writeable() const;
128 128 bool is_external() const;
129 129
130 130 void print_on(outputStream* st);
131 131 void print_as_flag(outputStream* st);
132 132 };
133 133
134 134 // debug flags control various aspects of the VM and are global accessible
135 135
136 136 // use FlagSetting to temporarily change some debug flag
137 137 // e.g. FlagSetting fs(DebugThisAndThat, true);
138 138 // restored to previous value upon leaving scope
139 139 class FlagSetting {
140 140 bool val;
141 141 bool* flag;
142 142 public:
143 143 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
144 144 ~FlagSetting() { *flag = val; }
145 145 };
146 146
147 147
148 148 class CounterSetting {
149 149 intx* counter;
150 150 public:
151 151 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
152 152 ~CounterSetting() { (*counter)--; }
153 153 };
154 154
155 155
156 156 class IntFlagSetting {
157 157 intx val;
158 158 intx* flag;
159 159 public:
160 160 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
161 161 ~IntFlagSetting() { *flag = val; }
162 162 };
163 163
164 164
165 165 class DoubleFlagSetting {
166 166 double val;
167 167 double* flag;
168 168 public:
169 169 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
170 170 ~DoubleFlagSetting() { *flag = val; }
171 171 };
172 172
173 173
174 174 class CommandLineFlags {
175 175 public:
176 176 static bool boolAt(char* name, size_t len, bool* value);
177 177 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
178 178 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
179 179 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
180 180
181 181 static bool intxAt(char* name, size_t len, intx* value);
182 182 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
183 183 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
184 184 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
185 185
186 186 static bool uintxAt(char* name, size_t len, uintx* value);
187 187 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
188 188 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
189 189 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
190 190
191 191 static bool doubleAt(char* name, size_t len, double* value);
192 192 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
193 193 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
194 194 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
195 195
196 196 static bool ccstrAt(char* name, size_t len, ccstr* value);
197 197 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
198 198 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
199 199 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
200 200
201 201 // Returns false if name is not a command line flag.
202 202 static bool wasSetOnCmdline(const char* name, bool* value);
203 203 static void printSetFlags();
204 204
205 205 static void printFlags() PRODUCT_RETURN;
206 206
207 207 static void verify() PRODUCT_RETURN;
208 208 };
209 209
210 210 // use this for flags that are true by default in the debug version but
211 211 // false in the optimized version, and vice versa
212 212 #ifdef ASSERT
213 213 #define trueInDebug true
214 214 #define falseInDebug false
215 215 #else
216 216 #define trueInDebug false
217 217 #define falseInDebug true
218 218 #endif
219 219
220 220 // use this for flags that are true per default in the product build
221 221 // but false in development builds, and vice versa
222 222 #ifdef PRODUCT
223 223 #define trueInProduct true
224 224 #define falseInProduct false
225 225 #else
226 226 #define trueInProduct false
227 227 #define falseInProduct true
228 228 #endif
229 229
230 230 // use this for flags that are true per default in the tiered build
231 231 // but false in non-tiered builds, and vice versa
232 232 #ifdef TIERED
233 233 #define trueInTiered true
234 234 #define falseInTiered false
235 235 #else
236 236 #define trueInTiered false
237 237 #define falseInTiered true
238 238 #endif
239 239
240 240
241 241 // develop flags are settable / visible only during development and are constant in the PRODUCT version
242 242 // product flags are always settable / visible
243 243 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
244 244
245 245 // A flag must be declared with one of the following types:
246 246 // bool, intx, uintx, ccstr.
247 247 // The type "ccstr" is an alias for "const char*" and is used
248 248 // only in this file, because the macrology requires single-token type names.
249 249
250 250 // Note: Diagnostic options not meant for VM tuning or for product modes.
251 251 // They are to be used for VM quality assurance or field diagnosis
252 252 // of VM bugs. They are hidden so that users will not be encouraged to
253 253 // try them as if they were VM ordinary execution options. However, they
254 254 // are available in the product version of the VM. Under instruction
255 255 // from support engineers, VM customers can turn them on to collect
256 256 // diagnostic information about VM problems. To use a VM diagnostic
257 257 // option, you must first specify +UnlockDiagnosticVMOptions.
258 258 // (This master switch also affects the behavior of -Xprintflags.)
259 259
260 260 // manageable flags are writeable external product flags.
261 261 // They are dynamically writeable through the JDK management interface
262 262 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
263 263 // These flags are external exported interface (see CCC). The list of
264 264 // manageable flags can be queried programmatically through the management
265 265 // interface.
266 266 //
267 267 // A flag can be made as "manageable" only if
268 268 // - the flag is defined in a CCC as an external exported interface.
269 269 // - the VM implementation supports dynamic setting of the flag.
270 270 // This implies that the VM must *always* query the flag variable
271 271 // and not reuse state related to the flag state at any given time.
272 272 // - you want the flag to be queried programmatically by the customers.
273 273 //
274 274 // product_rw flags are writeable internal product flags.
275 275 // They are like "manageable" flags but for internal/private use.
276 276 // The list of product_rw flags are internal/private flags which
277 277 // may be changed/removed in a future release. It can be set
278 278 // through the management interface to get/set value
279 279 // when the name of flag is supplied.
280 280 //
281 281 // A flag can be made as "product_rw" only if
282 282 // - the VM implementation supports dynamic setting of the flag.
283 283 // This implies that the VM must *always* query the flag variable
284 284 // and not reuse state related to the flag state at any given time.
285 285 //
286 286 // Note that when there is a need to support develop flags to be writeable,
287 287 // it can be done in the same way as product_rw.
288 288
289 289 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct, manageable, product_rw) \
290 290 \
291 291 /* UseMembar is theoretically a temp flag used for memory barrier \
292 292 * removal testing. It was supposed to be removed before FCS but has \
293 293 * been re-added (see 6401008) */ \
294 294 product(bool, UseMembar, false, \
295 295 "(Unstable) Issues membars on thread state transitions") \
296 296 \
297 297 product(bool, PrintCommandLineFlags, false, \
298 298 "Prints flags that appeared on the command line") \
299 299 \
300 300 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
301 301 "Enable processing of flags relating to field diagnostics") \
302 302 \
303 303 product(bool, JavaMonitorsInStackTrace, true, \
304 304 "Print info. about Java monitor locks when the stacks are dumped")\
305 305 \
306 306 product_pd(bool, UseLargePages, \
307 307 "Use large page memory") \
308 308 \
309 309 develop(bool, TracePageSizes, false, \
310 310 "Trace page size selection and usage.") \
311 311 \
312 312 product(bool, UseNUMA, false, \
313 313 "Use NUMA if available") \
314 314 \
315 315 product(intx, NUMAChunkResizeWeight, 20, \
316 316 "Percentage (0-100) used to weight the current sample when " \
317 317 "computing exponentially decaying average for " \
318 318 "AdaptiveNUMAChunkSizing") \
319 319 \
320 320 product(intx, NUMASpaceResizeRate, 1*G, \
321 321 "Do not reallocate more that this amount per collection") \
322 322 \
323 323 product(bool, UseAdaptiveNUMAChunkSizing, true, \
324 324 "Enable adaptive chunk sizing for NUMA") \
325 325 \
326 326 product(bool, NUMAStats, false, \
327 327 "Print NUMA stats in detailed heap information") \
328 328 \
329 329 product(intx, NUMAPageScanRate, 256, \
330 330 "Maximum number of pages to include in the page scan procedure") \
331 331 \
332 332 product_pd(bool, NeedsDeoptSuspend, \
333 333 "True for register window machines (sparc/ia64)") \
334 334 \
335 335 product(intx, UseSSE, 99, \
336 336 "Highest supported SSE instructions set on x86/x64") \
337 337 \
338 338 product(uintx, LargePageSizeInBytes, 0, \
339 339 "Large page size (0 to let VM choose the page size") \
340 340 \
341 341 product(uintx, LargePageHeapSizeThreshold, 128*M, \
342 342 "Use large pages if max heap is at least this big") \
343 343 \
344 344 product(bool, ForceTimeHighResolution, false, \
345 345 "Using high time resolution(For Win32 only)") \
346 346 \
347 347 product(bool, CacheTimeMillis, false, \
348 348 "Cache os::javaTimeMillis with CacheTimeMillisGranularity") \
349 349 \
350 350 diagnostic(uintx, CacheTimeMillisGranularity, 50, \
351 351 "Granularity for CacheTimeMillis") \
352 352 \
353 353 develop(bool, TraceItables, false, \
354 354 "Trace initialization and use of itables") \
355 355 \
356 356 develop(bool, TracePcPatching, false, \
357 357 "Trace usage of frame::patch_pc") \
358 358 \
359 359 develop(bool, TraceJumps, false, \
360 360 "Trace assembly jumps in thread ring buffer") \
361 361 \
362 362 develop(bool, TraceRelocator, false, \
363 363 "Trace the bytecode relocator") \
364 364 \
365 365 develop(bool, TraceLongCompiles, false, \
366 366 "Print out every time compilation is longer than " \
367 367 "a given threashold") \
368 368 \
369 369 develop(bool, SafepointALot, false, \
370 370 "Generates a lot of safepoints. Works with " \
371 371 "GuaranteedSafepointInterval") \
372 372 \
373 373 product_pd(bool, BackgroundCompilation, \
374 374 "A thread requesting compilation is not blocked during " \
375 375 "compilation") \
376 376 \
377 377 product(bool, PrintVMQWaitTime, false, \
378 378 "Prints out the waiting time in VM operation queue") \
379 379 \
380 380 develop(bool, BailoutToInterpreterForThrows, false, \
381 381 "Compiled methods which throws/catches exceptions will be " \
382 382 "deopt and intp.") \
383 383 \
384 384 develop(bool, NoYieldsInMicrolock, false, \
385 385 "Disable yields in microlock") \
386 386 \
387 387 develop(bool, TraceOopMapGeneration, false, \
388 388 "Shows oopmap generation") \
389 389 \
390 390 product(bool, MethodFlushing, true, \
391 391 "Reclamation of zombie and not-entrant methods") \
392 392 \
393 393 develop(bool, VerifyStack, false, \
394 394 "Verify stack of each thread when it is entering a runtime call") \
395 395 \
396 396 develop(bool, ForceUnreachable, false, \
397 397 "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \
398 398 \
399 399 notproduct(bool, StressDerivedPointers, false, \
400 400 "Force scavenge when a derived pointers is detected on stack " \
401 401 "after rtm call") \
402 402 \
403 403 develop(bool, TraceDerivedPointers, false, \
404 404 "Trace traversal of derived pointers on stack") \
405 405 \
406 406 notproduct(bool, TraceCodeBlobStacks, false, \
407 407 "Trace stack-walk of codeblobs") \
408 408 \
409 409 product(bool, PrintJNIResolving, false, \
410 410 "Used to implement -v:jni") \
411 411 \
412 412 notproduct(bool, PrintRewrites, false, \
413 413 "Print methods that are being rewritten") \
414 414 \
415 415 product(bool, UseInlineCaches, true, \
416 416 "Use Inline Caches for virtual calls ") \
417 417 \
418 418 develop(bool, InlineArrayCopy, true, \
419 419 "inline arraycopy native that is known to be part of " \
420 420 "base library DLL") \
421 421 \
422 422 develop(bool, InlineObjectHash, true, \
423 423 "inline Object::hashCode() native that is known to be part " \
424 424 "of base library DLL") \
425 425 \
426 426 develop(bool, InlineObjectCopy, true, \
427 427 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \
428 428 \
429 429 develop(bool, InlineNatives, true, \
430 430 "inline natives that are known to be part of base library DLL") \
431 431 \
432 432 develop(bool, InlineMathNatives, true, \
433 433 "inline SinD, CosD, etc.") \
434 434 \
435 435 develop(bool, InlineClassNatives, true, \
436 436 "inline Class.isInstance, etc") \
437 437 \
438 438 develop(bool, InlineAtomicLong, true, \
439 439 "inline sun.misc.AtomicLong") \
440 440 \
441 441 develop(bool, InlineThreadNatives, true, \
442 442 "inline Thread.currentThread, etc") \
443 443 \
444 444 develop(bool, InlineReflectionGetCallerClass, true, \
445 445 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\
446 446 "of base library DLL") \
447 447 \
448 448 develop(bool, InlineUnsafeOps, true, \
449 449 "inline memory ops (native methods) from sun.misc.Unsafe") \
450 450 \
451 451 develop(bool, ConvertCmpD2CmpF, true, \
452 452 "Convert cmpD to cmpF when one input is constant in float range") \
453 453 \
454 454 develop(bool, ConvertFloat2IntClipping, true, \
455 455 "Convert float2int clipping idiom to integer clipping") \
456 456 \
457 457 develop(bool, SpecialStringCompareTo, true, \
458 458 "special version of string compareTo") \
459 459 \
460 460 develop(bool, SpecialStringIndexOf, true, \
461 461 "special version of string indexOf") \
462 462 \
463 463 develop(bool, TraceCallFixup, false, \
464 464 "traces all call fixups") \
465 465 \
466 466 develop(bool, DeoptimizeALot, false, \
467 467 "deoptimize at every exit from the runtime system") \
468 468 \
469 469 develop(ccstrlist, DeoptimizeOnlyAt, "", \
470 470 "a comma separated list of bcis to deoptimize at") \
471 471 \
472 472 product(bool, DeoptimizeRandom, false, \
473 473 "deoptimize random frames on random exit from the runtime system")\
474 474 \
475 475 notproduct(bool, ZombieALot, false, \
476 476 "creates zombies (non-entrant) at exit from the runt. system") \
477 477 \
478 478 notproduct(bool, WalkStackALot, false, \
479 479 "trace stack (no print) at every exit from the runtime system") \
480 480 \
481 481 develop(bool, Debugging, false, \
482 482 "set when executing debug methods in debug.ccp " \
483 483 "(to prevent triggering assertions)") \
484 484 \
485 485 notproduct(bool, StrictSafepointChecks, trueInDebug, \
486 486 "Enable strict checks that safepoints cannot happen for threads " \
487 487 "that used No_Safepoint_Verifier") \
488 488 \
489 489 notproduct(bool, VerifyLastFrame, false, \
490 490 "Verify oops on last frame on entry to VM") \
491 491 \
492 492 develop(bool, TraceHandleAllocation, false, \
493 493 "Prints out warnings when suspicious many handles are allocated") \
494 494 \
495 495 product(bool, UseCompilerSafepoints, true, \
496 496 "Stop at safepoints in compiled code") \
497 497 \
498 498 product(bool, UseSplitVerifier, true, \
499 499 "use split verifier with StackMapTable attributes") \
500 500 \
501 501 product(bool, FailOverToOldVerifier, true, \
502 502 "fail over to old verifier when split verifier fails") \
503 503 \
504 504 develop(bool, ShowSafepointMsgs, false, \
505 505 "Show msg. about safepoint synch.") \
506 506 \
507 507 product(bool, SafepointTimeout, false, \
508 508 "Time out and warn or fail after SafepointTimeoutDelay " \
509 509 "milliseconds if failed to reach safepoint") \
510 510 \
511 511 develop(bool, DieOnSafepointTimeout, false, \
512 512 "Die upon failure to reach safepoint (see SafepointTimeout)") \
513 513 \
514 514 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
515 515 /* typically, at most a few retries are needed */ \
516 516 product(intx, SuspendRetryCount, 50, \
517 517 "Maximum retry count for an external suspend request") \
518 518 \
519 519 product(intx, SuspendRetryDelay, 5, \
520 520 "Milliseconds to delay per retry (* current_retry_count)") \
521 521 \
522 522 product(bool, AssertOnSuspendWaitFailure, false, \
523 523 "Assert/Guarantee on external suspend wait failure") \
524 524 \
525 525 product(bool, TraceSuspendWaitFailures, false, \
526 526 "Trace external suspend wait failures") \
527 527 \
528 528 product(bool, MaxFDLimit, true, \
529 529 "Bump the number of file descriptors to max in solaris.") \
530 530 \
531 531 notproduct(bool, LogEvents, trueInDebug, \
532 532 "Enable Event log") \
533 533 \
534 534 product(bool, BytecodeVerificationRemote, true, \
535 535 "Enables the Java bytecode verifier for remote classes") \
536 536 \
537 537 product(bool, BytecodeVerificationLocal, false, \
538 538 "Enables the Java bytecode verifier for local classes") \
539 539 \
540 540 develop(bool, ForceFloatExceptions, trueInDebug, \
541 541 "Force exceptions on FP stack under/overflow") \
542 542 \
543 543 develop(bool, SoftMatchFailure, trueInProduct, \
544 544 "If the DFA fails to match a node, print a message and bail out") \
545 545 \
546 546 develop(bool, VerifyStackAtCalls, false, \
547 547 "Verify that the stack pointer is unchanged after calls") \
548 548 \
549 549 develop(bool, TraceJavaAssertions, false, \
550 550 "Trace java language assertions") \
551 551 \
552 552 notproduct(bool, CheckAssertionStatusDirectives, false, \
553 553 "temporary - see javaClasses.cpp") \
554 554 \
555 555 notproduct(bool, PrintMallocFree, false, \
556 556 "Trace calls to C heap malloc/free allocation") \
557 557 \
558 558 notproduct(bool, PrintOopAddress, false, \
559 559 "Always print the location of the oop") \
560 560 \
561 561 notproduct(bool, VerifyCodeCacheOften, false, \
562 562 "Verify compiled-code cache often") \
563 563 \
564 564 develop(bool, ZapDeadCompiledLocals, false, \
565 565 "Zap dead locals in compiler frames") \
566 566 \
567 567 notproduct(bool, ZapDeadLocalsOld, false, \
568 568 "Zap dead locals (old version, zaps all frames when " \
569 569 "entering the VM") \
570 570 \
571 571 notproduct(bool, CheckOopishValues, false, \
572 572 "Warn if value contains oop ( requires ZapDeadLocals)") \
573 573 \
574 574 develop(bool, UseMallocOnly, false, \
575 575 "use only malloc/free for allocation (no resource area/arena)") \
576 576 \
577 577 develop(bool, PrintMalloc, false, \
578 578 "print all malloc/free calls") \
579 579 \
580 580 develop(bool, ZapResourceArea, trueInDebug, \
581 581 "Zap freed resource/arena space with 0xABABABAB") \
582 582 \
583 583 notproduct(bool, ZapVMHandleArea, trueInDebug, \
584 584 "Zap freed VM handle space with 0xBCBCBCBC") \
585 585 \
586 586 develop(bool, ZapJNIHandleArea, trueInDebug, \
587 587 "Zap freed JNI handle space with 0xFEFEFEFE") \
588 588 \
589 589 develop(bool, ZapUnusedHeapArea, trueInDebug, \
590 590 "Zap unused heap space with 0xBAADBABE") \
591 591 \
592 592 develop(bool, PrintVMMessages, true, \
593 593 "Print vm messages on console") \
594 594 \
595 595 product(bool, PrintGCApplicationConcurrentTime, false, \
596 596 "Print the time the application has been running") \
597 597 \
598 598 product(bool, PrintGCApplicationStoppedTime, false, \
599 599 "Print the time the application has been stopped") \
600 600 \
601 601 develop(bool, Verbose, false, \
602 602 "Prints additional debugging information from other modes") \
603 603 \
604 604 develop(bool, PrintMiscellaneous, false, \
605 605 "Prints uncategorized debugging information (requires +Verbose)") \
606 606 \
607 607 develop(bool, WizardMode, false, \
608 608 "Prints much more debugging information") \
609 609 \
610 610 product(bool, ShowMessageBoxOnError, false, \
611 611 "Keep process alive on VM fatal error") \
612 612 \
613 613 product_pd(bool, UseOSErrorReporting, \
614 614 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
615 615 \
616 616 product(bool, SuppressFatalErrorMessage, false, \
617 617 "Do NO Fatal Error report [Avoid deadlock]") \
618 618 \
619 619 product(ccstrlist, OnError, "", \
620 620 "Run user-defined commands on fatal error; see VMError.cpp " \
621 621 "for examples") \
622 622 \
623 623 product(ccstrlist, OnOutOfMemoryError, "", \
624 624 "Run user-defined commands on first java.lang.OutOfMemoryError") \
625 625 \
626 626 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
627 627 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
628 628 \
629 629 manageable(ccstr, HeapDumpPath, NULL, \
630 630 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
631 631 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
632 632 "in the working directory)") \
633 633 \
634 634 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
635 635 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
636 636 "when the heap usage is larger than this") \
637 637 \
638 638 develop(uintx, HeapDumpSegmentSize, 1*G, \
639 639 "Approximate segment size when generating a segmented heap dump") \
640 640 \
641 641 develop(bool, BreakAtWarning, false, \
642 642 "Execute breakpoint upon encountering VM warning") \
643 643 \
644 644 product_pd(bool, UseVectoredExceptions, \
645 645 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
646 646 \
647 647 develop(bool, TraceVMOperation, false, \
648 648 "Trace vm operations") \
649 649 \
650 650 develop(bool, UseFakeTimers, false, \
651 651 "Tells whether the VM should use system time or a fake timer") \
652 652 \
653 653 diagnostic(bool, LogCompilation, false, \
654 654 "Log compilation activity in detail to hotspot.log or LogFile") \
655 655 \
656 656 product(bool, PrintCompilation, false, \
657 657 "Print compilations") \
658 658 \
659 659 diagnostic(bool, TraceNMethodInstalls, false, \
660 660 "Trace nmethod intallation") \
661 661 \
662 662 diagnostic(bool, TraceOSRBreakpoint, false, \
663 663 "Trace OSR Breakpoint ") \
664 664 \
665 665 diagnostic(bool, TraceCompileTriggered, false, \
666 666 "Trace compile triggered") \
667 667 \
668 668 diagnostic(bool, TraceTriggers, false, \
669 669 "Trace triggers") \
670 670 \
671 671 product(bool, AlwaysRestoreFPU, false, \
672 672 "Restore the FPU control word after every JNI call (expensive)") \
673 673 \
674 674 notproduct(bool, PrintCompilation2, false, \
675 675 "Print additional statistics per compilation") \
676 676 \
677 677 notproduct(bool, PrintAdapterHandlers, false, \
678 678 "Print code generated for i2c/c2i adapters") \
679 679 \
680 680 develop(bool, PrintAssembly, false, \
681 681 "Print assembly code") \
682 682 \
683 683 develop(bool, PrintNMethods, false, \
684 684 "Print assembly code for nmethods when generated") \
685 685 \
686 686 develop(bool, PrintNativeNMethods, false, \
687 687 "Print assembly code for native nmethods when generated") \
688 688 \
689 689 develop(bool, PrintDebugInfo, false, \
690 690 "Print debug information for all nmethods when generated") \
691 691 \
692 692 develop(bool, PrintRelocations, false, \
693 693 "Print relocation information for all nmethods when generated") \
694 694 \
695 695 develop(bool, PrintDependencies, false, \
696 696 "Print dependency information for all nmethods when generated") \
697 697 \
698 698 develop(bool, PrintExceptionHandlers, false, \
699 699 "Print exception handler tables for all nmethods when generated") \
700 700 \
701 701 develop(bool, InterceptOSException, false, \
702 702 "Starts debugger when an implicit OS (e.g., NULL) " \
703 703 "exception happens") \
704 704 \
705 705 notproduct(bool, PrintCodeCache, false, \
706 706 "Print the compiled_code cache when exiting") \
707 707 \
708 708 develop(bool, PrintCodeCache2, false, \
709 709 "Print detailed info on the compiled_code cache when exiting") \
710 710 \
711 711 develop(bool, PrintStubCode, false, \
712 712 "Print generated stub code") \
713 713 \
714 714 product(bool, StackTraceInThrowable, true, \
715 715 "Collect backtrace in throwable when exception happens") \
716 716 \
717 717 product(bool, OmitStackTraceInFastThrow, true, \
718 718 "Omit backtraces for some 'hot' exceptions in optimized code") \
719 719 \
720 720 product(bool, ProfilerPrintByteCodeStatistics, false, \
721 721 "Prints byte code statictics when dumping profiler output") \
722 722 \
723 723 product(bool, ProfilerRecordPC, false, \
724 724 "Collects tick for each 16 byte interval of compiled code") \
725 725 \
726 726 product(bool, ProfileVM, false, \
727 727 "Profiles ticks that fall within VM (either in the VM Thread " \
728 728 "or VM code called through stubs)") \
729 729 \
730 730 product(bool, ProfileIntervals, false, \
731 731 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
732 732 \
733 733 notproduct(bool, ProfilerCheckIntervals, false, \
734 734 "Collect and print info on spacing of profiler ticks") \
735 735 \
736 736 develop(bool, PrintJVMWarnings, false, \
737 737 "Prints warnings for unimplemented JVM functions") \
738 738 \
739 739 notproduct(uintx, WarnOnStalledSpinLock, 0, \
740 740 "Prints warnings for stalled SpinLocks") \
741 741 \
742 742 develop(bool, InitializeJavaLangSystem, true, \
743 743 "Initialize java.lang.System - turn off for individual " \
744 744 "method debugging") \
745 745 \
746 746 develop(bool, InitializeJavaLangString, true, \
747 747 "Initialize java.lang.String - turn off for individual " \
748 748 "method debugging") \
749 749 \
750 750 develop(bool, InitializeJavaLangExceptionsErrors, true, \
751 751 "Initialize various error and exception classes - turn off for " \
752 752 "individual method debugging") \
753 753 \
754 754 product(bool, RegisterFinalizersAtInit, true, \
755 755 "Register finalizable objects at end of Object.<init> or " \
756 756 "after allocation.") \
757 757 \
758 758 develop(bool, RegisterReferences, true, \
759 759 "Tells whether the VM should register soft/weak/final/phantom " \
760 760 "references") \
761 761 \
762 762 develop(bool, IgnoreRewrites, false, \
763 763 "Supress rewrites of bytecodes in the oopmap generator. " \
764 764 "This is unsafe!") \
765 765 \
766 766 develop(bool, PrintCodeCacheExtension, false, \
767 767 "Print extension of code cache") \
768 768 \
769 769 develop(bool, UsePrivilegedStack, true, \
770 770 "Enable the security JVM functions") \
771 771 \
772 772 develop(bool, IEEEPrecision, true, \
773 773 "Enables IEEE precision (for INTEL only)") \
774 774 \
775 775 develop(bool, ProtectionDomainVerification, true, \
776 776 "Verifies protection domain before resolution in system " \
777 777 "dictionary") \
778 778 \
779 779 product(bool, ClassUnloading, true, \
780 780 "Do unloading of classes") \
781 781 \
782 782 develop(bool, DisableStartThread, false, \
783 783 "Disable starting of additional Java threads " \
784 784 "(for debugging only)") \
785 785 \
786 786 develop(bool, MemProfiling, false, \
787 787 "Write memory usage profiling to log file") \
788 788 \
789 789 notproduct(bool, PrintSystemDictionaryAtExit, false, \
790 790 "Prints the system dictionary at exit") \
791 791 \
792 792 diagnostic(bool, UnsyncloadClass, false, \
793 793 "Unstable: VM calls loadClass unsynchronized. Custom classloader "\
794 794 "must call VM synchronized for findClass & defineClass") \
795 795 \
796 796 product_pd(bool, DontYieldALot, \
797 797 "Throw away obvious excess yield calls (for SOLARIS only)") \
798 798 \
799 799 product_pd(bool, ConvertSleepToYield, \
800 800 "Converts sleep(0) to thread yield " \
801 801 "(may be off for SOLARIS to improve GUI)") \
802 802 \
803 803 product(bool, ConvertYieldToSleep, false, \
804 804 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
805 805 "behavior (SOLARIS only)") \
806 806 \
807 807 product(bool, UseBoundThreads, true, \
808 808 "Bind user level threads to kernel threads (for SOLARIS only)") \
809 809 \
810 810 develop(bool, UseDetachedThreads, true, \
811 811 "Use detached threads that are recycled upon termination " \
812 812 "(for SOLARIS only)") \
813 813 \
814 814 product(bool, UseLWPSynchronization, true, \
815 815 "Use LWP-based instead of libthread-based synchronization " \
816 816 "(SPARC only)") \
817 817 \
818 818 product(ccstr, SyncKnobs, "", \
819 819 "(Unstable) Various monitor synchronization tunables") \
820 820 \
821 821 product(intx, EmitSync, 0, \
822 822 "(Unsafe,Unstable) " \
823 823 " Controls emission of inline sync fast-path code") \
824 824 \
825 825 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \
826 826 \
827 827 product(intx, Atomics, 0, \
828 828 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \
829 829 \
830 830 product(intx, FenceInstruction, 0, \
831 831 "(Unsafe,Unstable) Experimental") \
832 832 \
833 833 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
834 834 \
835 835 product(intx, SyncVerbose, 0, "(Unstable)" ) \
836 836 \
837 837 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
838 838 \
839 839 product(intx, hashCode, 0, \
840 840 "(Unstable) select hashCode generation algorithm" ) \
841 841 \
842 842 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
843 843 "(Unstable, Linux-specific)" \
844 844 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
845 845 \
846 846 product(bool, FilterSpuriousWakeups , true, \
847 847 "Prevent spurious or premature wakeups from object.wait" \
848 848 "(Solaris only)") \
849 849 \
850 850 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
851 851 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
852 852 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
853 853 \
854 854 develop(bool, UsePthreads, false, \
855 855 "Use pthread-based instead of libthread-based synchronization " \
856 856 "(SPARC only)") \
857 857 \
858 858 product(bool, AdjustConcurrency, false, \
859 859 "call thr_setconcurrency at thread create time to avoid " \
860 860 "LWP starvation on MP systems (For Solaris Only)") \
861 861 \
862 862 develop(bool, UpdateHotSpotCompilerFileOnError, true, \
863 863 "Should the system attempt to update the compiler file when " \
864 864 "an error occurs?") \
865 865 \
866 866 product(bool, ReduceSignalUsage, false, \
867 867 "Reduce the use of OS signals in Java and/or the VM") \
868 868 \
869 869 notproduct(bool, ValidateMarkSweep, false, \
870 870 "Do extra validation during MarkSweep collection") \
871 871 \
872 872 notproduct(bool, RecordMarkSweepCompaction, false, \
873 873 "Enable GC-to-GC recording and querying of compaction during " \
874 874 "MarkSweep") \
875 875 \
876 876 develop_pd(bool, ShareVtableStubs, \
877 877 "Share vtable stubs (smaller code but worse branch prediction") \
878 878 \
879 879 develop(bool, LoadLineNumberTables, true, \
880 880 "Tells whether the class file parser loads line number tables") \
881 881 \
882 882 develop(bool, LoadLocalVariableTables, true, \
883 883 "Tells whether the class file parser loads local variable tables")\
884 884 \
885 885 develop(bool, LoadLocalVariableTypeTables, true, \
886 886 "Tells whether the class file parser loads local variable type tables")\
887 887 \
888 888 product(bool, AllowUserSignalHandlers, false, \
889 889 "Do not complain if the application installs signal handlers " \
890 890 "(Solaris & Linux only)") \
891 891 \
892 892 product(bool, UseSignalChaining, true, \
893 893 "Use signal-chaining to invoke signal handlers installed " \
894 894 "by the application (Solaris & Linux only)") \
895 895 \
896 896 product(bool, UseAltSigs, false, \
897 897 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
898 898 "internal signals. (Solaris only)") \
899 899 \
900 900 product(bool, UseSpinning, false, \
901 901 "Use spinning in monitor inflation and before entry") \
902 902 \
903 903 product(bool, PreSpinYield, false, \
904 904 "Yield before inner spinning loop") \
905 905 \
906 906 product(bool, PostSpinYield, true, \
907 907 "Yield after inner spinning loop") \
908 908 \
909 909 product(bool, AllowJNIEnvProxy, false, \
910 910 "Allow JNIEnv proxies for jdbx") \
911 911 \
912 912 product(bool, JNIDetachReleasesMonitors, true, \
913 913 "JNI DetachCurrentThread releases monitors owned by thread") \
914 914 \
915 915 product(bool, RestoreMXCSROnJNICalls, false, \
916 916 "Restore MXCSR when returning from JNI calls") \
917 917 \
918 918 product(bool, CheckJNICalls, false, \
919 919 "Verify all arguments to JNI calls") \
920 920 \
921 921 product(bool, UseFastJNIAccessors, true, \
922 922 "Use optimized versions of Get<Primitive>Field") \
923 923 \
924 924 product(bool, EagerXrunInit, false, \
925 925 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
926 926 " but not all -Xrun libraries may support the state of the VM at this time") \
927 927 \
928 928 product(bool, PreserveAllAnnotations, false, \
929 929 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
930 930 \
931 931 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
932 932 "Number of OutOfMemoryErrors preallocated with backtrace") \
933 933 \
934 934 product(bool, LazyBootClassLoader, true, \
935 935 "Enable/disable lazy opening of boot class path entries") \
936 936 \
937 937 diagnostic(bool, UseIncDec, true, \
938 938 "Use INC, DEC instructions on x86") \
939 939 \
940 940 product(bool, UseStoreImmI16, true, \
941 941 "Use store immediate 16-bits value instruction on x86") \
942 942 \
943 943 product(bool, UseAddressNop, false, \
944 944 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \
945 945 \
946 946 product(bool, UseXmmLoadAndClearUpper, true, \
947 947 "Load low part of XMM register and clear upper part") \
948 948 \
949 949 product(bool, UseXmmRegToRegMoveAll, false, \
950 950 "Copy all XMM register bits when moving value between registers") \
951 951 \
952 952 product(intx, FieldsAllocationStyle, 1, \
953 953 "0 - type based with oops first, 1 - with oops last") \
954 954 \
955 955 product(bool, CompactFields, true, \
956 956 "Allocate nonstatic fields in gaps between previous fields") \
957 957 \
958 958 notproduct(bool, PrintCompactFieldsSavings, false, \
959 959 "Print how many words were saved with CompactFields") \
960 960 \
961 961 product(bool, UseBiasedLocking, true, \
962 962 "Enable biased locking in JVM") \
963 963 \
964 964 product(intx, BiasedLockingStartupDelay, 4000, \
965 965 "Number of milliseconds to wait before enabling biased locking") \
966 966 \
967 967 diagnostic(bool, PrintBiasedLockingStatistics, false, \
968 968 "Print statistics of biased locking in JVM") \
969 969 \
970 970 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
971 971 "Threshold of number of revocations per type to try to " \
972 972 "rebias all objects in the heap of that type") \
973 973 \
974 974 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
975 975 "Threshold of number of revocations per type to permanently " \
976 976 "revoke biases of all objects in the heap of that type") \
977 977 \
978 978 product(intx, BiasedLockingDecayTime, 25000, \
979 979 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
980 980 "type after previous bulk rebias") \
981 981 \
982 982 /* tracing */ \
983 983 \
984 984 notproduct(bool, TraceRuntimeCalls, false, \
985 985 "Trace run-time calls") \
986 986 \
987 987 develop(bool, TraceJNICalls, false, \
988 988 "Trace JNI calls") \
989 989 \
990 990 notproduct(bool, TraceJVMCalls, false, \
991 991 "Trace JVM calls") \
992 992 \
993 993 product(ccstr, TraceJVMTI, "", \
994 994 "Trace flags for JVMTI functions and events") \
995 995 \
996 996 /* This option can change an EMCP method into an obsolete method. */ \
997 997 /* This can affect tests that except specific methods to be EMCP. */ \
998 998 /* This option should be used with caution. */ \
999 999 product(bool, StressLdcRewrite, false, \
1000 1000 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1001 1001 \
1002 1002 product(intx, TraceRedefineClasses, 0, \
1003 1003 "Trace level for JVMTI RedefineClasses") \
1004 1004 \
1005 1005 /* change to false by default sometime after Mustang */ \
1006 1006 product(bool, VerifyMergedCPBytecodes, true, \
1007 1007 "Verify bytecodes after RedefineClasses constant pool merging") \
1008 1008 \
1009 1009 develop(bool, TraceJNIHandleAllocation, false, \
1010 1010 "Trace allocation/deallocation of JNI handle blocks") \
1011 1011 \
1012 1012 develop(bool, TraceThreadEvents, false, \
1013 1013 "Trace all thread events") \
1014 1014 \
1015 1015 develop(bool, TraceBytecodes, false, \
1016 1016 "Trace bytecode execution") \
1017 1017 \
1018 1018 develop(bool, TraceClassInitialization, false, \
1019 1019 "Trace class initialization") \
1020 1020 \
1021 1021 develop(bool, TraceExceptions, false, \
1022 1022 "Trace exceptions") \
1023 1023 \
1024 1024 develop(bool, TraceICs, false, \
1025 1025 "Trace inline cache changes") \
1026 1026 \
1027 1027 notproduct(bool, TraceInvocationCounterOverflow, false, \
1028 1028 "Trace method invocation counter overflow") \
1029 1029 \
1030 1030 develop(bool, TraceInlineCacheClearing, false, \
1031 1031 "Trace clearing of inline caches in nmethods") \
1032 1032 \
1033 1033 develop(bool, TraceDependencies, false, \
1034 1034 "Trace dependencies") \
1035 1035 \
1036 1036 develop(bool, VerifyDependencies, trueInDebug, \
1037 1037 "Exercise and verify the compilation dependency mechanism") \
1038 1038 \
1039 1039 develop(bool, TraceNewOopMapGeneration, false, \
1040 1040 "Trace OopMapGeneration") \
1041 1041 \
1042 1042 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1043 1043 "Trace OopMapGeneration: print detailed cell states") \
1044 1044 \
1045 1045 develop(bool, TimeOopMap, false, \
1046 1046 "Time calls to GenerateOopMap::compute_map() in sum") \
1047 1047 \
1048 1048 develop(bool, TimeOopMap2, false, \
1049 1049 "Time calls to GenerateOopMap::compute_map() individually") \
1050 1050 \
1051 1051 develop(bool, TraceMonitorMismatch, false, \
1052 1052 "Trace monitor matching failures during OopMapGeneration") \
1053 1053 \
1054 1054 develop(bool, TraceOopMapRewrites, false, \
1055 1055 "Trace rewritting of method oops during oop map generation") \
1056 1056 \
1057 1057 develop(bool, TraceSafepoint, false, \
1058 1058 "Trace safepoint operations") \
1059 1059 \
1060 1060 develop(bool, TraceICBuffer, false, \
1061 1061 "Trace usage of IC buffer") \
1062 1062 \
1063 1063 develop(bool, TraceCompiledIC, false, \
1064 1064 "Trace changes of compiled IC") \
1065 1065 \
1066 1066 notproduct(bool, TraceZapDeadLocals, false, \
1067 1067 "Trace zapping dead locals") \
1068 1068 \
1069 1069 develop(bool, TraceStartupTime, false, \
1070 1070 "Trace setup time") \
1071 1071 \
1072 1072 develop(bool, TraceHPI, false, \
1073 1073 "Trace Host Porting Interface (HPI)") \
1074 1074 \
1075 1075 product(ccstr, HPILibPath, NULL, \
1076 1076 "Specify alternate path to HPI library") \
1077 1077 \
1078 1078 develop(bool, TraceProtectionDomainVerification, false, \
1079 1079 "Trace protection domain verifcation") \
1080 1080 \
1081 1081 develop(bool, TraceClearedExceptions, false, \
1082 1082 "Prints when an exception is forcibly cleared") \
1083 1083 \
1084 1084 product(bool, TraceClassResolution, false, \
1085 1085 "Trace all constant pool resolutions (for debugging)") \
1086 1086 \
1087 1087 product(bool, TraceBiasedLocking, false, \
1088 1088 "Trace biased locking in JVM") \
1089 1089 \
1090 1090 product(bool, TraceMonitorInflation, false, \
1091 1091 "Trace monitor inflation in JVM") \
1092 1092 \
1093 1093 /* assembler */ \
1094 1094 product(bool, Use486InstrsOnly, false, \
1095 1095 "Use 80486 Compliant instruction subset") \
1096 1096 \
1097 1097 /* gc */ \
1098 1098 \
1099 1099 product(bool, UseSerialGC, false, \
1100 1100 "Tells whether the VM should use serial garbage collector") \
1101 1101 \
1102 1102 product(bool, UseParallelGC, false, \
1103 1103 "Use the Parallel Scavenge garbage collector") \
1104 1104 \
1105 1105 product(bool, UseParallelOldGC, false, \
1106 1106 "Use the Parallel Old garbage collector") \
1107 1107 \
1108 1108 product(bool, UseParallelOldGCCompacting, true, \
1109 1109 "In the Parallel Old garbage collector use parallel compaction") \
1110 1110 \
1111 1111 product(bool, UseParallelDensePrefixUpdate, true, \
1112 1112 "In the Parallel Old garbage collector use parallel dense" \
1113 1113 " prefix update") \
1114 1114 \
1115 1115 develop(bool, UseParallelOldGCChunkPointerCalc, true, \
1116 1116 "In the Parallel Old garbage collector use chucks to calculate" \
1117 1117 " new object locations") \
1118 1118 \
1119 1119 product(uintx, HeapMaximumCompactionInterval, 20, \
1120 1120 "How often should we maximally compact the heap (not allowing " \
1121 1121 "any dead space)") \
1122 1122 \
1123 1123 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1124 1124 "The collection count for the first maximum compaction") \
1125 1125 \
1126 1126 product(bool, UseMaximumCompactionOnSystemGC, true, \
1127 1127 "In the Parallel Old garbage collector maximum compaction for " \
1128 1128 "a system GC") \
1129 1129 \
1130 1130 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1131 1131 "The mean used by the par compact dead wood" \
1132 1132 "limiter (a number between 0-100).") \
1133 1133 \
1134 1134 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1135 1135 "The standard deviation used by the par compact dead wood" \
1136 1136 "limiter (a number between 0-100).") \
1137 1137 \
1138 1138 product(bool, UseParallelOldGCDensePrefix, true, \
1139 1139 "Use a dense prefix with the Parallel Old garbage collector") \
1140 1140 \
1141 1141 product(uintx, ParallelGCThreads, 0, \
1142 1142 "Number of parallel threads parallel gc will use") \
1143 1143 \
1144 1144 product(uintx, ParallelCMSThreads, 0, \
1145 1145 "Max number of threads CMS will use for concurrent work") \
1146 1146 \
1147 1147 develop(bool, VerifyParallelOldWithMarkSweep, false, \
1148 1148 "Use the MarkSweep code to verify phases of Parallel Old") \
1149 1149 \
1150 1150 develop(uintx, VerifyParallelOldWithMarkSweepInterval, 1, \
1151 1151 "Interval at which the MarkSweep code is used to verify " \
1152 1152 "phases of Parallel Old") \
1153 1153 \
1154 1154 develop(bool, ParallelOldMTUnsafeMarkBitMap, false, \
1155 1155 "Use the Parallel Old MT unsafe in marking the bitmap") \
1156 1156 \
1157 1157 develop(bool, ParallelOldMTUnsafeUpdateLiveData, false, \
1158 1158 "Use the Parallel Old MT unsafe in update of live size") \
1159 1159 \
1160 1160 develop(bool, TraceChunkTasksQueuing, false, \
1161 1161 "Trace the queuing of the chunk tasks") \
1162 1162 \
1163 1163 product(uintx, YoungPLABSize, 4096, \
1164 1164 "Size of young gen promotion labs (in HeapWords)") \
1165 1165 \
1166 1166 product(uintx, OldPLABSize, 1024, \
1167 1167 "Size of old gen promotion labs (in HeapWords)") \
1168 1168 \
1169 1169 product(uintx, GCTaskTimeStampEntries, 200, \
1170 1170 "Number of time stamp entries per gc worker thread") \
1171 1171 \
1172 1172 product(bool, AlwaysTenure, false, \
1173 1173 "Always tenure objects in eden. (ParallelGC only)") \
1174 1174 \
1175 1175 product(bool, NeverTenure, false, \
1176 1176 "Never tenure objects in eden, May tenure on overflow" \
1177 1177 " (ParallelGC only)") \
1178 1178 \
1179 1179 product(bool, ScavengeBeforeFullGC, true, \
1180 1180 "Scavenge youngest generation before each full GC," \
1181 1181 " used with UseParallelGC") \
1182 1182 \
1183 1183 develop(bool, ScavengeWithObjectsInToSpace, false, \
1184 1184 "Allow scavenges to occur when to_space contains objects.") \
1185 1185 \
1186 1186 product(bool, UseConcMarkSweepGC, false, \
1187 1187 "Use Concurrent Mark-Sweep GC in the old generation") \
1188 1188 \
1189 1189 product(bool, ExplicitGCInvokesConcurrent, false, \
1190 1190 "A System.gc() request invokes a concurrent collection;" \
1191 1191 " (effective only when UseConcMarkSweepGC)") \
1192 1192 \
1193 1193 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1194 1194 "A System.gc() request invokes a concurrent collection and" \
1195 1195 " also unloads classes during such a concurrent gc cycle " \
1196 1196 " (effective only when UseConcMarkSweepGC)") \
1197 1197 \
1198 1198 develop(bool, UseCMSAdaptiveFreeLists, true, \
1199 1199 "Use Adaptive Free Lists in the CMS generation") \
1200 1200 \
1201 1201 develop(bool, UseAsyncConcMarkSweepGC, true, \
1202 1202 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1203 1203 \
1204 1204 develop(bool, RotateCMSCollectionTypes, false, \
1205 1205 "Rotate the CMS collections among concurrent and STW") \
1206 1206 \
1207 1207 product(bool, UseCMSBestFit, true, \
1208 1208 "Use CMS best fit allocation strategy") \
1209 1209 \
1210 1210 product(bool, UseCMSCollectionPassing, true, \
1211 1211 "Use passing of collection from background to foreground") \
1212 1212 \
1213 1213 product(bool, UseParNewGC, false, \
1214 1214 "Use parallel threads in the new generation.") \
1215 1215 \
1216 1216 product(bool, ParallelGCVerbose, false, \
1217 1217 "Verbose output for parallel GC.") \
1218 1218 \
1219 1219 product(intx, ParallelGCBufferWastePct, 10, \
1220 1220 "wasted fraction of parallel allocation buffer.") \
1221 1221 \
1222 1222 product(bool, ParallelGCRetainPLAB, true, \
1223 1223 "Retain parallel allocation buffers across scavenges.") \
1224 1224 \
1225 1225 product(intx, TargetPLABWastePct, 10, \
1226 1226 "target wasted space in last buffer as pct of overall allocation")\
1227 1227 \
1228 1228 product(uintx, PLABWeight, 75, \
1229 1229 "Percentage (0-100) used to weight the current sample when" \
1230 1230 "computing exponentially decaying average for ResizePLAB.") \
1231 1231 \
1232 1232 product(bool, ResizePLAB, true, \
1233 1233 "Dynamically resize (survivor space) promotion labs") \
1234 1234 \
1235 1235 product(bool, PrintPLAB, false, \
1236 1236 "Print (survivor space) promotion labs sizing decisions") \
1237 1237 \
1238 1238 product(intx, ParGCArrayScanChunk, 50, \
1239 1239 "Scan a subset and push remainder, if array is bigger than this") \
1240 1240 \
1241 1241 product(intx, ParGCDesiredObjsFromOverflowList, 20, \
1242 1242 "The desired number of objects to claim from the overflow list") \
1243 1243 \
1244 1244 product(uintx, CMSParPromoteBlocksToClaim, 50, \
1245 1245 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1246 1246 "parallel GC.") \
1247 1247 \
1248 1248 product(bool, AlwaysPreTouch, false, \
1249 1249 "It forces all freshly committed pages to be pre-touched.") \
1250 1250 \
1251 1251 product(bool, CMSUseOldDefaults, false, \
1252 1252 "A flag temporarily introduced to allow reverting to some older" \
1253 1253 "default settings; older as of 6.0 ") \
1254 1254 \
1255 1255 product(intx, CMSYoungGenPerWorker, 16*M, \
1256 1256 "The amount of young gen chosen by default per GC worker " \
1257 1257 "thread available ") \
1258 1258 \
1259 1259 product(bool, CMSIncrementalMode, false, \
1260 1260 "Whether CMS GC should operate in \"incremental\" mode") \
1261 1261 \
1262 1262 product(uintx, CMSIncrementalDutyCycle, 10, \
1263 1263 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1264 1264 "CMSIncrementalPacing is enabled, then this is just the initial" \
1265 1265 "value") \
1266 1266 \
1267 1267 product(bool, CMSIncrementalPacing, true, \
1268 1268 "Whether the CMS incremental mode duty cycle should be " \
1269 1269 "automatically adjusted") \
1270 1270 \
1271 1271 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1272 1272 "Lower bound on the duty cycle when CMSIncrementalPacing is" \
1273 1273 "enabled (a percentage, 0-100).") \
1274 1274 \
1275 1275 product(uintx, CMSIncrementalSafetyFactor, 10, \
1276 1276 "Percentage (0-100) used to add conservatism when computing the" \
1277 1277 "duty cycle.") \
1278 1278 \
1279 1279 product(uintx, CMSIncrementalOffset, 0, \
1280 1280 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1281 1281 "is shifted to the right within the period between young GCs") \
1282 1282 \
1283 1283 product(uintx, CMSExpAvgFactor, 25, \
1284 1284 "Percentage (0-100) used to weight the current sample when" \
1285 1285 "computing exponential averages for CMS statistics.") \
1286 1286 \
1287 1287 product(uintx, CMS_FLSWeight, 50, \
1288 1288 "Percentage (0-100) used to weight the current sample when" \
1289 1289 "computing exponentially decating averages for CMS FLS statistics.") \
1290 1290 \
1291 1291 product(uintx, CMS_FLSPadding, 2, \
1292 1292 "The multiple of deviation from mean to use for buffering" \
1293 1293 "against volatility in free list demand.") \
1294 1294 \
1295 1295 product(uintx, FLSCoalescePolicy, 2, \
1296 1296 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1297 1297 \
1298 1298 product(uintx, CMS_SweepWeight, 50, \
1299 1299 "Percentage (0-100) used to weight the current sample when" \
1300 1300 "computing exponentially decaying average for inter-sweep duration.") \
1301 1301 \
1302 1302 product(uintx, CMS_SweepPadding, 2, \
1303 1303 "The multiple of deviation from mean to use for buffering" \
1304 1304 "against volatility in inter-sweep duration.") \
1305 1305 \
1306 1306 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1307 1307 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1308 1308 " duration exceeds this threhold in milliseconds") \
1309 1309 \
1310 1310 develop(bool, CMSTraceIncrementalMode, false, \
1311 1311 "Trace CMS incremental mode") \
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1312 1312 \
1313 1313 develop(bool, CMSTraceIncrementalPacing, false, \
1314 1314 "Trace CMS incremental mode pacing computation") \
1315 1315 \
1316 1316 develop(bool, CMSTraceThreadState, false, \
1317 1317 "Trace the CMS thread state (enable the trace_state() method)") \
1318 1318 \
1319 1319 product(bool, CMSClassUnloadingEnabled, false, \
1320 1320 "Whether class unloading enabled when using CMS GC") \
1321 1321 \
1322 + product(uintx, CMSClassUnloadingMaxInterval, 0, \
1323 + "When CMS class unloading is enabled, the maximum CMS cycle count"\
1324 + " for which classes may not be unloaded") \
1325 + \
1322 1326 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1323 1327 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1324 1328 \
1325 1329 product(bool, UseCMSCompactAtFullCollection, true, \
1326 1330 "Use mark sweep compact at full collections") \
1327 1331 \
1328 1332 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1329 1333 "Number of CMS full collection done before compaction if > 0") \
1330 1334 \
1331 1335 develop(intx, CMSDictionaryChoice, 0, \
1332 1336 "Use BinaryTreeDictionary as default in the CMS generation") \
1333 1337 \
1334 1338 product(uintx, CMSIndexedFreeListReplenish, 4, \
1335 1339 "Replenish and indexed free list with this number of chunks") \
1336 1340 \
1337 1341 product(bool, CMSLoopWarn, false, \
1338 1342 "Warn in case of excessive CMS looping") \
1339 1343 \
1340 1344 develop(bool, CMSOverflowEarlyRestoration, false, \
1341 1345 "Whether preserved marks should be restored early") \
1342 1346 \
1343 1347 product(uintx, CMSMarkStackSize, 32*K, \
1344 1348 "Size of CMS marking stack") \
1345 1349 \
1346 1350 product(uintx, CMSMarkStackSizeMax, 4*M, \
1347 1351 "Max size of CMS marking stack") \
1348 1352 \
1349 1353 notproduct(bool, CMSMarkStackOverflowALot, false, \
1350 1354 "Whether we should simulate frequent marking stack / work queue" \
1351 1355 " overflow") \
1352 1356 \
1353 1357 notproduct(intx, CMSMarkStackOverflowInterval, 1000, \
1354 1358 "A per-thread `interval' counter that determines how frequently" \
1355 1359 " we simulate overflow; a smaller number increases frequency") \
1356 1360 \
1357 1361 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1358 1362 "(Temporary, subject to experimentation)" \
1359 1363 "Maximum number of abortable preclean iterations, if > 0") \
1360 1364 \
1361 1365 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1362 1366 "(Temporary, subject to experimentation)" \
1363 1367 "Maximum time in abortable preclean in ms") \
1364 1368 \
1365 1369 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1366 1370 "(Temporary, subject to experimentation)" \
1367 1371 "Nominal minimum work per abortable preclean iteration") \
1368 1372 \
1369 1373 product(intx, CMSAbortablePrecleanWaitMillis, 100, \
1370 1374 "(Temporary, subject to experimentation)" \
1371 1375 " Time that we sleep between iterations when not given" \
1372 1376 " enough work per iteration") \
1373 1377 \
1374 1378 product(uintx, CMSRescanMultiple, 32, \
1375 1379 "Size (in cards) of CMS parallel rescan task") \
1376 1380 \
1377 1381 product(uintx, CMSConcMarkMultiple, 32, \
1378 1382 "Size (in cards) of CMS concurrent MT marking task") \
1379 1383 \
1380 1384 product(uintx, CMSRevisitStackSize, 1*M, \
1381 1385 "Size of CMS KlassKlass revisit stack") \
1382 1386 \
1383 1387 product(bool, CMSAbortSemantics, false, \
1384 1388 "Whether abort-on-overflow semantics is implemented") \
1385 1389 \
1386 1390 product(bool, CMSParallelRemarkEnabled, true, \
1387 1391 "Whether parallel remark enabled (only if ParNewGC)") \
1388 1392 \
1389 1393 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1390 1394 "Whether parallel remark of survivor space" \
1391 1395 " enabled (effective only if CMSParallelRemarkEnabled)") \
1392 1396 \
1393 1397 product(bool, CMSPLABRecordAlways, true, \
1394 1398 "Whether to always record survivor space PLAB bdries" \
1395 1399 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1396 1400 \
1397 1401 product(bool, CMSConcurrentMTEnabled, true, \
1398 1402 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1399 1403 \
1400 1404 product(bool, CMSPermGenPrecleaningEnabled, true, \
1401 1405 "Whether concurrent precleaning enabled in perm gen" \
1402 1406 " (effective only when CMSPrecleaningEnabled is true)") \
1403 1407 \
1404 1408 product(bool, CMSPrecleaningEnabled, true, \
1405 1409 "Whether concurrent precleaning enabled") \
1406 1410 \
1407 1411 product(uintx, CMSPrecleanIter, 3, \
1408 1412 "Maximum number of precleaning iteration passes") \
1409 1413 \
1410 1414 product(uintx, CMSPrecleanNumerator, 2, \
1411 1415 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1412 1416 " ratio") \
1413 1417 \
1414 1418 product(uintx, CMSPrecleanDenominator, 3, \
1415 1419 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1416 1420 " ratio") \
1417 1421 \
1418 1422 product(bool, CMSPrecleanRefLists1, true, \
1419 1423 "Preclean ref lists during (initial) preclean phase") \
1420 1424 \
1421 1425 product(bool, CMSPrecleanRefLists2, false, \
1422 1426 "Preclean ref lists during abortable preclean phase") \
1423 1427 \
1424 1428 product(bool, CMSPrecleanSurvivors1, false, \
1425 1429 "Preclean survivors during (initial) preclean phase") \
1426 1430 \
1427 1431 product(bool, CMSPrecleanSurvivors2, true, \
1428 1432 "Preclean survivors during abortable preclean phase") \
1429 1433 \
1430 1434 product(uintx, CMSPrecleanThreshold, 1000, \
1431 1435 "Don't re-iterate if #dirty cards less than this") \
1432 1436 \
1433 1437 product(bool, CMSCleanOnEnter, true, \
1434 1438 "Clean-on-enter optimization for reducing number of dirty cards") \
1435 1439 \
1436 1440 product(uintx, CMSRemarkVerifyVariant, 1, \
1437 1441 "Choose variant (1,2) of verification following remark") \
1438 1442 \
1439 1443 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1440 1444 "If Eden used is below this value, don't try to schedule remark") \
1441 1445 \
1442 1446 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1443 1447 "The Eden occupancy % at which to try and schedule remark pause") \
1444 1448 \
1445 1449 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1446 1450 "Start sampling Eden top at least before yg occupancy reaches" \
1447 1451 " 1/<ratio> of the size at which we plan to schedule remark") \
1448 1452 \
1449 1453 product(uintx, CMSSamplingGrain, 16*K, \
1450 1454 "The minimum distance between eden samples for CMS (see above)") \
1451 1455 \
1452 1456 product(bool, CMSScavengeBeforeRemark, false, \
1453 1457 "Attempt scavenge before the CMS remark step") \
1454 1458 \
1455 1459 develop(bool, CMSTraceSweeper, false, \
1456 1460 "Trace some actions of the CMS sweeper") \
1457 1461 \
1458 1462 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1459 1463 "Don't drain below this size per parallel worker/thief") \
1460 1464 \
1461 1465 product(intx, CMSWaitDuration, 2000, \
1462 1466 "Time in milliseconds that CMS thread waits for young GC") \
1463 1467 \
1464 1468 product(bool, CMSYield, true, \
1465 1469 "Yield between steps of concurrent mark & sweep") \
1466 1470 \
1467 1471 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1468 1472 "Bitmap operations should process at most this many bits" \
1469 1473 "between yields") \
1470 1474 \
1471 1475 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1472 1476 "Verify that all refs across the FLS boundary " \
1473 1477 " are to valid objects") \
1474 1478 \
1475 1479 diagnostic(bool, FLSVerifyLists, false, \
1476 1480 "Do lots of (expensive) FreeListSpace verification") \
1477 1481 \
1478 1482 diagnostic(bool, FLSVerifyIndexTable, false, \
1479 1483 "Do lots of (expensive) FLS index table verification") \
1480 1484 \
1481 1485 develop(bool, FLSVerifyDictionary, false, \
1482 1486 "Do lots of (expensive) FLS dictionary verification") \
1483 1487 \
1484 1488 develop(bool, VerifyBlockOffsetArray, false, \
1485 1489 "Do (expensive!) block offset array verification") \
1486 1490 \
1487 1491 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \
1488 1492 "Maintain _unallocated_block in BlockOffsetArray" \
1489 1493 " (currently applicable only to CMS collector)") \
1490 1494 \
1491 1495 develop(bool, TraceCMSState, false, \
1492 1496 "Trace the state of the CMS collection") \
1493 1497 \
1494 1498 product(intx, RefDiscoveryPolicy, 0, \
1495 1499 "Whether reference-based(0) or referent-based(1)") \
1496 1500 \
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1497 1501 product(bool, ParallelRefProcEnabled, false, \
1498 1502 "Enable parallel reference processing whenever possible") \
1499 1503 \
1500 1504 product(bool, ParallelRefProcBalancingEnabled, true, \
1501 1505 "Enable balancing of reference processing queues") \
1502 1506 \
1503 1507 product(intx, CMSTriggerRatio, 80, \
1504 1508 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1505 1509 " allocated before a CMS collection cycle commences") \
1506 1510 \
1507 - product(intx, CMSBootstrapOccupancy, 50, \
1511 + product(intx, CMSTriggerPermRatio, 80, \
1512 + "Percentage of MinHeapFreeRatio in the CMS perm generation that" \
1513 + " is allocated before a CMS collection cycle commences, that " \
1514 + " also collects the perm generation") \
1515 + \
1516 + product(uintx, CMSBootstrapOccupancy, 50, \
1508 1517 "Percentage CMS generation occupancy at which to " \
1509 1518 " initiate CMS collection for bootstrapping collection stats") \
1510 1519 \
1511 1520 product(intx, CMSInitiatingOccupancyFraction, -1, \
1512 1521 "Percentage CMS generation occupancy to start a CMS collection " \
1513 - " cycle (A negative value means that CMSTirggerRatio is used)") \
1522 + " cycle (A negative value means that CMSTriggerRatio is used)") \
1514 1523 \
1524 + product(intx, CMSInitiatingPermOccupancyFraction, -1, \
1525 + "Percentage CMS perm generation occupancy to start a CMScollection"\
1526 + " cycle (A negative value means that CMSTriggerPermRatio is used)")\
1527 + \
1515 1528 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1516 1529 "Only use occupancy as a crierion for starting a CMS collection") \
1517 1530 \
1518 1531 develop(bool, CMSTestInFreeList, false, \
1519 1532 "Check if the coalesced range is already in the " \
1520 1533 "free lists as claimed.") \
1521 1534 \
1522 1535 notproduct(bool, CMSVerifyReturnedBytes, false, \
1523 1536 "Check that all the garbage collected was returned to the " \
1524 1537 "free lists.") \
1525 1538 \
1526 1539 notproduct(bool, ScavengeALot, false, \
1527 1540 "Force scavenge at every Nth exit from the runtime system " \
1528 1541 "(N=ScavengeALotInterval)") \
1529 1542 \
1530 1543 develop(bool, FullGCALot, false, \
1531 1544 "Force full gc at every Nth exit from the runtime system " \
1532 1545 "(N=FullGCALotInterval)") \
1533 1546 \
1534 1547 notproduct(bool, GCALotAtAllSafepoints, false, \
1535 1548 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1536 1549 \
1537 1550 product(bool, HandlePromotionFailure, true, \
1538 1551 "The youngest generation collection does not require" \
1539 1552 " a guarantee of full promotion of all live objects.") \
1540 1553 \
1541 1554 notproduct(bool, PromotionFailureALot, false, \
1542 1555 "Use promotion failure handling on every youngest generation " \
1543 1556 "collection") \
1544 1557 \
1545 1558 develop(uintx, PromotionFailureALotCount, 1000, \
1546 1559 "Number of promotion failures occurring at ParGCAllocBuffer" \
1547 1560 "refill attempts (ParNew) or promotion attempts " \
1548 1561 "(other young collectors) ") \
1549 1562 \
1550 1563 develop(uintx, PromotionFailureALotInterval, 5, \
1551 1564 "Total collections between promotion failures alot") \
1552 1565 \
1553 1566 develop(intx, WorkStealingSleepMillis, 1, \
1554 1567 "Sleep time when sleep is used for yields") \
1555 1568 \
1556 1569 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \
1557 1570 "Number of yields before a sleep is done during workstealing") \
1558 1571 \
1559 1572 product(uintx, PreserveMarkStackSize, 40, \
1560 1573 "Size for stack used in promotion failure handling") \
1561 1574 \
1562 1575 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
1563 1576 \
1564 1577 product_pd(bool, ResizeTLAB, \
1565 1578 "Dynamically resize tlab size for threads") \
1566 1579 \
1567 1580 product(bool, ZeroTLAB, false, \
1568 1581 "Zero out the newly created TLAB") \
1569 1582 \
1570 1583 product(bool, PrintTLAB, false, \
1571 1584 "Print various TLAB related information") \
1572 1585 \
1573 1586 product(bool, TLABStats, true, \
1574 1587 "Print various TLAB related information") \
1575 1588 \
1576 1589 product_pd(bool, NeverActAsServerClassMachine, \
1577 1590 "Never act like a server-class machine") \
1578 1591 \
1579 1592 product(bool, AlwaysActAsServerClassMachine, false, \
1580 1593 "Always act like a server-class machine") \
1581 1594 \
1582 1595 product_pd(uintx, DefaultMaxRAM, \
1583 1596 "Maximum real memory size for setting server class heap size") \
1584 1597 \
1585 1598 product(uintx, DefaultMaxRAMFraction, 4, \
1586 1599 "Fraction (1/n) of real memory used for server class max heap") \
1587 1600 \
1588 1601 product(uintx, DefaultInitialRAMFraction, 64, \
1589 1602 "Fraction (1/n) of real memory used for server class initial heap") \
1590 1603 \
1591 1604 product(bool, UseAutoGCSelectPolicy, false, \
1592 1605 "Use automatic collection selection policy") \
1593 1606 \
1594 1607 product(uintx, AutoGCSelectPauseMillis, 5000, \
1595 1608 "Automatic GC selection pause threshhold in ms") \
1596 1609 \
1597 1610 product(bool, UseAdaptiveSizePolicy, true, \
1598 1611 "Use adaptive generation sizing policies") \
1599 1612 \
1600 1613 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
1601 1614 "Use adaptive survivor sizing policies") \
1602 1615 \
1603 1616 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
1604 1617 "Use adaptive young-old sizing policies at minor collections") \
1605 1618 \
1606 1619 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
1607 1620 "Use adaptive young-old sizing policies at major collections") \
1608 1621 \
1609 1622 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
1610 1623 "Use statistics from System.GC for adaptive size policy") \
1611 1624 \
1612 1625 product(bool, UseAdaptiveGCBoundary, false, \
1613 1626 "Allow young-old boundary to move") \
1614 1627 \
1615 1628 develop(bool, TraceAdaptiveGCBoundary, false, \
1616 1629 "Trace young-old boundary moves") \
1617 1630 \
1618 1631 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
1619 1632 "Resize the virtual spaces of the young or old generations") \
1620 1633 \
1621 1634 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
1622 1635 "Policy for changeing generation size for throughput goals") \
1623 1636 \
1624 1637 product(uintx, AdaptiveSizePausePolicy, 0, \
1625 1638 "Policy for changing generation size for pause goals") \
1626 1639 \
1627 1640 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
1628 1641 "Adjust tenured generation to achive a minor pause goal") \
1629 1642 \
1630 1643 develop(bool, PSAdjustYoungGenForMajorPause, false, \
1631 1644 "Adjust young generation to achive a major pause goal") \
1632 1645 \
1633 1646 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
1634 1647 "Number of steps where heuristics is used before data is used") \
1635 1648 \
1636 1649 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
1637 1650 "Number of collections before the adaptive sizing is started") \
1638 1651 \
1639 1652 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
1640 1653 "Collecton interval for printing information, zero => never") \
1641 1654 \
1642 1655 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
1643 1656 "Use adaptive minimum footprint as a goal") \
1644 1657 \
1645 1658 product(uintx, AdaptiveSizePolicyWeight, 10, \
1646 1659 "Weight given to exponential resizing, between 0 and 100") \
1647 1660 \
1648 1661 product(uintx, AdaptiveTimeWeight, 25, \
1649 1662 "Weight given to time in adaptive policy, between 0 and 100") \
1650 1663 \
1651 1664 product(uintx, PausePadding, 1, \
1652 1665 "How much buffer to keep for pause time") \
1653 1666 \
1654 1667 product(uintx, PromotedPadding, 3, \
1655 1668 "How much buffer to keep for promotion failure") \
1656 1669 \
1657 1670 product(uintx, SurvivorPadding, 3, \
1658 1671 "How much buffer to keep for survivor overflow") \
1659 1672 \
1660 1673 product(uintx, AdaptivePermSizeWeight, 20, \
1661 1674 "Weight for perm gen exponential resizing, between 0 and 100") \
1662 1675 \
1663 1676 product(uintx, PermGenPadding, 3, \
1664 1677 "How much buffer to keep for perm gen sizing") \
1665 1678 \
1666 1679 product(uintx, ThresholdTolerance, 10, \
1667 1680 "Allowed collection cost difference between generations") \
1668 1681 \
1669 1682 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
1670 1683 "If collection costs are within margin, reduce both by full delta") \
1671 1684 \
1672 1685 product(uintx, YoungGenerationSizeIncrement, 20, \
1673 1686 "Adaptive size percentage change in young generation") \
1674 1687 \
1675 1688 product(uintx, YoungGenerationSizeSupplement, 80, \
1676 1689 "Supplement to YoungedGenerationSizeIncrement used at startup") \
1677 1690 \
1678 1691 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
1679 1692 "Decay factor to YoungedGenerationSizeSupplement") \
1680 1693 \
1681 1694 product(uintx, TenuredGenerationSizeIncrement, 20, \
1682 1695 "Adaptive size percentage change in tenured generation") \
1683 1696 \
1684 1697 product(uintx, TenuredGenerationSizeSupplement, 80, \
1685 1698 "Supplement to TenuredGenerationSizeIncrement used at startup") \
1686 1699 \
1687 1700 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
1688 1701 "Decay factor to TenuredGenerationSizeIncrement") \
1689 1702 \
1690 1703 product(uintx, MaxGCPauseMillis, max_uintx, \
1691 1704 "Adaptive size policy maximum GC pause time goal in msec") \
1692 1705 \
1693 1706 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
1694 1707 "Adaptive size policy maximum GC minor pause time goal in msec") \
1695 1708 \
1696 1709 product(uintx, GCTimeRatio, 99, \
1697 1710 "Adaptive size policy application time to GC time ratio") \
1698 1711 \
1699 1712 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
1700 1713 "Adaptive size scale down factor for shrinking") \
1701 1714 \
1702 1715 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
1703 1716 "Adaptive size decays the major cost for long major intervals") \
1704 1717 \
1705 1718 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
1706 1719 "Time scale over which major costs decay") \
1707 1720 \
1708 1721 product(uintx, MinSurvivorRatio, 3, \
1709 1722 "Minimum ratio of young generation/survivor space size") \
1710 1723 \
1711 1724 product(uintx, InitialSurvivorRatio, 8, \
1712 1725 "Initial ratio of eden/survivor space size") \
1713 1726 \
1714 1727 product(uintx, BaseFootPrintEstimate, 256*M, \
1715 1728 "Estimate of footprint other than Java Heap") \
1716 1729 \
1717 1730 product(bool, UseGCOverheadLimit, true, \
1718 1731 "Use policy to limit of proportion of time spent in GC " \
1719 1732 "before an OutOfMemory error is thrown") \
1720 1733 \
1721 1734 product(uintx, GCTimeLimit, 98, \
1722 1735 "Limit of proportion of time spent in GC before an OutOfMemory" \
1723 1736 "error is thrown (used with GCHeapFreeLimit)") \
1724 1737 \
1725 1738 product(uintx, GCHeapFreeLimit, 2, \
1726 1739 "Minimum percentage of free space after a full GC before an " \
1727 1740 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
1728 1741 \
1729 1742 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
1730 1743 "Number of consecutive collections before gc time limit fires") \
1731 1744 \
1732 1745 product(bool, PrintAdaptiveSizePolicy, false, \
1733 1746 "Print information about AdaptiveSizePolicy") \
1734 1747 \
1735 1748 product(intx, PrefetchCopyIntervalInBytes, -1, \
1736 1749 "How far ahead to prefetch destination area (<= 0 means off)") \
1737 1750 \
1738 1751 product(intx, PrefetchScanIntervalInBytes, -1, \
1739 1752 "How far ahead to prefetch scan area (<= 0 means off)") \
1740 1753 \
1741 1754 product(intx, PrefetchFieldsAhead, -1, \
1742 1755 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
1743 1756 \
1744 1757 develop(bool, UsePrefetchQueue, true, \
1745 1758 "Use the prefetch queue during PS promotion") \
1746 1759 \
1747 1760 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
1748 1761 "Verify system before exiting") \
1749 1762 \
1750 1763 diagnostic(bool, VerifyBeforeGC, false, \
1751 1764 "Verify memory system before GC") \
1752 1765 \
1753 1766 diagnostic(bool, VerifyAfterGC, false, \
1754 1767 "Verify memory system after GC") \
1755 1768 \
1756 1769 diagnostic(bool, VerifyDuringGC, false, \
1757 1770 "Verify memory system during GC (between phases)") \
1758 1771 \
1759 1772 diagnostic(bool, VerifyRememberedSets, false, \
1760 1773 "Verify GC remembered sets") \
1761 1774 \
1762 1775 diagnostic(bool, VerifyObjectStartArray, true, \
1763 1776 "Verify GC object start array if verify before/after") \
1764 1777 \
1765 1778 product(bool, DisableExplicitGC, false, \
1766 1779 "Tells whether calling System.gc() does a full GC") \
1767 1780 \
1768 1781 notproduct(bool, CheckMemoryInitialization, false, \
1769 1782 "Checks memory initialization") \
1770 1783 \
1771 1784 product(bool, CollectGen0First, false, \
1772 1785 "Collect youngest generation before each full GC") \
1773 1786 \
1774 1787 diagnostic(bool, BindCMSThreadToCPU, false, \
1775 1788 "Bind CMS Thread to CPU if possible") \
1776 1789 \
1777 1790 diagnostic(uintx, CPUForCMSThread, 0, \
1778 1791 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
1779 1792 \
1780 1793 product(bool, BindGCTaskThreadsToCPUs, false, \
1781 1794 "Bind GCTaskThreads to CPUs if possible") \
1782 1795 \
1783 1796 product(bool, UseGCTaskAffinity, false, \
1784 1797 "Use worker affinity when asking for GCTasks") \
1785 1798 \
1786 1799 product(uintx, ProcessDistributionStride, 4, \
1787 1800 "Stride through processors when distributing processes") \
1788 1801 \
1789 1802 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
1790 1803 "number of times the coordinator GC thread will sleep while " \
1791 1804 "yielding before giving up and resuming GC") \
1792 1805 \
1793 1806 product(uintx, CMSYieldSleepCount, 0, \
1794 1807 "number of times a GC thread (minus the coordinator) " \
1795 1808 "will sleep while yielding before giving up and resuming GC") \
1796 1809 \
1797 1810 /* gc tracing */ \
1798 1811 manageable(bool, PrintGC, false, \
1799 1812 "Print message at garbage collect") \
1800 1813 \
1801 1814 manageable(bool, PrintGCDetails, false, \
1802 1815 "Print more details at garbage collect") \
1803 1816 \
1804 1817 manageable(bool, PrintGCDateStamps, false, \
1805 1818 "Print date stamps at garbage collect") \
1806 1819 \
1807 1820 manageable(bool, PrintGCTimeStamps, false, \
1808 1821 "Print timestamps at garbage collect") \
1809 1822 \
1810 1823 product(bool, PrintGCTaskTimeStamps, false, \
1811 1824 "Print timestamps for individual gc worker thread tasks") \
1812 1825 \
1813 1826 develop(intx, ConcGCYieldTimeout, 0, \
1814 1827 "If non-zero, assert that GC threads yield within this # of ms.") \
1815 1828 \
1816 1829 notproduct(bool, TraceMarkSweep, false, \
1817 1830 "Trace mark sweep") \
1818 1831 \
1819 1832 product(bool, PrintReferenceGC, false, \
1820 1833 "Print times spent handling reference objects during GC " \
1821 1834 " (enabled only when PrintGCDetails)") \
1822 1835 \
1823 1836 develop(bool, TraceReferenceGC, false, \
1824 1837 "Trace handling of soft/weak/final/phantom references") \
1825 1838 \
1826 1839 develop(bool, TraceFinalizerRegistration, false, \
1827 1840 "Trace registration of final references") \
1828 1841 \
1829 1842 notproduct(bool, TraceScavenge, false, \
1830 1843 "Trace scavenge") \
1831 1844 \
1832 1845 product_rw(bool, TraceClassLoading, false, \
1833 1846 "Trace all classes loaded") \
1834 1847 \
1835 1848 product(bool, TraceClassLoadingPreorder, false, \
1836 1849 "Trace all classes loaded in order referenced (not loaded)") \
1837 1850 \
1838 1851 product_rw(bool, TraceClassUnloading, false, \
1839 1852 "Trace unloading of classes") \
1840 1853 \
1841 1854 product_rw(bool, TraceLoaderConstraints, false, \
1842 1855 "Trace loader constraints") \
1843 1856 \
1844 1857 product(bool, TraceGen0Time, false, \
1845 1858 "Trace accumulated time for Gen 0 collection") \
1846 1859 \
1847 1860 product(bool, TraceGen1Time, false, \
1848 1861 "Trace accumulated time for Gen 1 collection") \
1849 1862 \
1850 1863 product(bool, PrintTenuringDistribution, false, \
1851 1864 "Print tenuring age information") \
1852 1865 \
1853 1866 product_rw(bool, PrintHeapAtGC, false, \
1854 1867 "Print heap layout before and after each GC") \
1855 1868 \
1856 1869 product(bool, PrintHeapAtSIGBREAK, true, \
1857 1870 "Print heap layout in response to SIGBREAK") \
1858 1871 \
1859 1872 manageable(bool, PrintClassHistogram, false, \
1860 1873 "Print a histogram of class instances") \
1861 1874 \
1862 1875 develop(bool, TraceWorkGang, false, \
1863 1876 "Trace activities of work gangs") \
1864 1877 \
1865 1878 product(bool, TraceParallelOldGCTasks, false, \
1866 1879 "Trace multithreaded GC activity") \
1867 1880 \
1868 1881 develop(bool, TraceBlockOffsetTable, false, \
1869 1882 "Print BlockOffsetTable maps") \
1870 1883 \
1871 1884 develop(bool, TraceCardTableModRefBS, false, \
1872 1885 "Print CardTableModRefBS maps") \
1873 1886 \
1874 1887 develop(bool, TraceGCTaskManager, false, \
1875 1888 "Trace actions of the GC task manager") \
1876 1889 \
1877 1890 develop(bool, TraceGCTaskQueue, false, \
1878 1891 "Trace actions of the GC task queues") \
1879 1892 \
1880 1893 develop(bool, TraceGCTaskThread, false, \
1881 1894 "Trace actions of the GC task threads") \
1882 1895 \
1883 1896 product(bool, PrintParallelOldGCPhaseTimes, false, \
1884 1897 "Print the time taken by each parallel old gc phase." \
1885 1898 "PrintGCDetails must also be enabled.") \
1886 1899 \
1887 1900 develop(bool, TraceParallelOldGCMarkingPhase, false, \
1888 1901 "Trace parallel old gc marking phase") \
1889 1902 \
1890 1903 develop(bool, TraceParallelOldGCSummaryPhase, false, \
1891 1904 "Trace parallel old gc summary phase") \
1892 1905 \
1893 1906 develop(bool, TraceParallelOldGCCompactionPhase, false, \
1894 1907 "Trace parallel old gc compaction phase") \
1895 1908 \
1896 1909 develop(bool, TraceParallelOldGCDensePrefix, false, \
1897 1910 "Trace parallel old gc dense prefix computation") \
1898 1911 \
1899 1912 develop(bool, IgnoreLibthreadGPFault, false, \
1900 1913 "Suppress workaround for libthread GP fault") \
1901 1914 \
1902 1915 /* JVMTI heap profiling */ \
1903 1916 \
1904 1917 diagnostic(bool, TraceJVMTIObjectTagging, false, \
1905 1918 "Trace JVMTI object tagging calls") \
1906 1919 \
1907 1920 diagnostic(bool, VerifyBeforeIteration, false, \
1908 1921 "Verify memory system before JVMTI iteration") \
1909 1922 \
1910 1923 /* compiler interface */ \
1911 1924 \
1912 1925 develop(bool, CIPrintCompilerName, false, \
1913 1926 "when CIPrint is active, print the name of the active compiler") \
1914 1927 \
1915 1928 develop(bool, CIPrintCompileQueue, false, \
1916 1929 "display the contents of the compile queue whenever a " \
1917 1930 "compilation is enqueued") \
1918 1931 \
1919 1932 develop(bool, CIPrintRequests, false, \
1920 1933 "display every request for compilation") \
1921 1934 \
1922 1935 product(bool, CITime, false, \
1923 1936 "collect timing information for compilation") \
1924 1937 \
1925 1938 develop(bool, CITimeEach, false, \
1926 1939 "display timing information after each successful compilation") \
1927 1940 \
1928 1941 develop(bool, CICountOSR, true, \
1929 1942 "use a separate counter when assigning ids to osr compilations") \
1930 1943 \
1931 1944 develop(bool, CICompileNatives, true, \
1932 1945 "compile native methods if supported by the compiler") \
1933 1946 \
1934 1947 develop_pd(bool, CICompileOSR, \
1935 1948 "compile on stack replacement methods if supported by the " \
1936 1949 "compiler") \
1937 1950 \
1938 1951 develop(bool, CIPrintMethodCodes, false, \
1939 1952 "print method bytecodes of the compiled code") \
1940 1953 \
1941 1954 develop(bool, CIPrintTypeFlow, false, \
1942 1955 "print the results of ciTypeFlow analysis") \
1943 1956 \
1944 1957 develop(bool, CITraceTypeFlow, false, \
1945 1958 "detailed per-bytecode tracing of ciTypeFlow analysis") \
1946 1959 \
1947 1960 develop(intx, CICloneLoopTestLimit, 100, \
1948 1961 "size limit for blocks heuristically cloned in ciTypeFlow") \
1949 1962 \
1950 1963 /* temp diagnostics */ \
1951 1964 \
1952 1965 diagnostic(bool, TraceRedundantCompiles, false, \
1953 1966 "Have compile broker print when a request already in the queue is"\
1954 1967 " requested again") \
1955 1968 \
1956 1969 diagnostic(bool, InitialCompileFast, false, \
1957 1970 "Initial compile at CompLevel_fast_compile") \
1958 1971 \
1959 1972 diagnostic(bool, InitialCompileReallyFast, false, \
1960 1973 "Initial compile at CompLevel_really_fast_compile (no profile)") \
1961 1974 \
1962 1975 diagnostic(bool, FullProfileOnReInterpret, true, \
1963 1976 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\
1964 1977 \
1965 1978 /* compiler */ \
1966 1979 \
1967 1980 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
1968 1981 "Number of compiler threads to run") \
1969 1982 \
1970 1983 product(intx, CompilationPolicyChoice, 0, \
1971 1984 "which compilation policy (0/1)") \
1972 1985 \
1973 1986 develop(bool, UseStackBanging, true, \
1974 1987 "use stack banging for stack overflow checks (required for " \
1975 1988 "proper StackOverflow handling; disable only to measure cost " \
1976 1989 "of stackbanging)") \
1977 1990 \
1978 1991 develop(bool, Use24BitFPMode, true, \
1979 1992 "Set 24-bit FPU mode on a per-compile basis ") \
1980 1993 \
1981 1994 develop(bool, Use24BitFP, true, \
1982 1995 "use FP instructions that produce 24-bit precise results") \
1983 1996 \
1984 1997 develop(bool, UseStrictFP, true, \
1985 1998 "use strict fp if modifier strictfp is set") \
1986 1999 \
1987 2000 develop(bool, GenerateSynchronizationCode, true, \
1988 2001 "generate locking/unlocking code for synchronized methods and " \
1989 2002 "monitors") \
1990 2003 \
1991 2004 develop(bool, GenerateCompilerNullChecks, true, \
1992 2005 "Generate explicit null checks for loads/stores/calls") \
1993 2006 \
1994 2007 develop(bool, GenerateRangeChecks, true, \
1995 2008 "Generate range checks for array accesses") \
1996 2009 \
1997 2010 develop_pd(bool, ImplicitNullChecks, \
1998 2011 "generate code for implicit null checks") \
1999 2012 \
2000 2013 product(bool, PrintSafepointStatistics, false, \
2001 2014 "print statistics about safepoint synchronization") \
2002 2015 \
2003 2016 product(intx, PrintSafepointStatisticsCount, 300, \
2004 2017 "total number of safepoint statistics collected " \
2005 2018 "before printing them out") \
2006 2019 \
2007 2020 product(intx, PrintSafepointStatisticsTimeout, -1, \
2008 2021 "print safepoint statistics only when safepoint takes" \
2009 2022 " more than PrintSafepointSatisticsTimeout in millis") \
2010 2023 \
2011 2024 develop(bool, InlineAccessors, true, \
2012 2025 "inline accessor methods (get/set)") \
2013 2026 \
2014 2027 product(bool, Inline, true, \
2015 2028 "enable inlining") \
2016 2029 \
2017 2030 product(bool, ClipInlining, true, \
2018 2031 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2019 2032 \
2020 2033 develop(bool, UseCHA, true, \
2021 2034 "enable CHA") \
2022 2035 \
2023 2036 product(bool, UseTypeProfile, true, \
2024 2037 "Check interpreter profile for historically monomorphic calls") \
2025 2038 \
2026 2039 product(intx, TypeProfileMajorReceiverPercent, 90, \
2027 2040 "% of major receiver type to all profiled receivers") \
2028 2041 \
2029 2042 notproduct(bool, TimeCompiler, false, \
2030 2043 "time the compiler") \
2031 2044 \
2032 2045 notproduct(bool, TimeCompiler2, false, \
2033 2046 "detailed time the compiler (requires +TimeCompiler)") \
2034 2047 \
2035 2048 diagnostic(bool, PrintInlining, false, \
2036 2049 "prints inlining optimizations") \
2037 2050 \
2038 2051 diagnostic(bool, PrintIntrinsics, false, \
2039 2052 "prints attempted and successful inlining of intrinsics") \
2040 2053 \
2041 2054 diagnostic(ccstrlist, DisableIntrinsic, "", \
2042 2055 "do not expand intrinsics whose (internal) names appear here") \
2043 2056 \
2044 2057 develop(bool, StressReflectiveCode, false, \
2045 2058 "Use inexact types at allocations, etc., to test reflection") \
2046 2059 \
2047 2060 develop(bool, EagerInitialization, false, \
2048 2061 "Eagerly initialize classes if possible") \
2049 2062 \
2050 2063 product(bool, Tier1UpdateMethodData, trueInTiered, \
2051 2064 "Update methodDataOops in Tier1-generated code") \
2052 2065 \
2053 2066 develop(bool, TraceMethodReplacement, false, \
2054 2067 "Print when methods are replaced do to recompilation") \
2055 2068 \
2056 2069 develop(bool, PrintMethodFlushing, false, \
2057 2070 "print the nmethods being flushed") \
2058 2071 \
2059 2072 notproduct(bool, LogMultipleMutexLocking, false, \
2060 2073 "log locking and unlocking of mutexes (only if multiple locks " \
2061 2074 "are held)") \
2062 2075 \
2063 2076 develop(bool, UseRelocIndex, false, \
2064 2077 "use an index to speed random access to relocations") \
2065 2078 \
2066 2079 develop(bool, StressCodeBuffers, false, \
2067 2080 "Exercise code buffer expansion and other rare state changes") \
2068 2081 \
2069 2082 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2070 2083 "Generate extra debugging info for non-safepoints in nmethods") \
2071 2084 \
2072 2085 diagnostic(bool, DebugInlinedCalls, true, \
2073 2086 "If false, restricts profiled locations to the root method only") \
2074 2087 \
2075 2088 product(bool, PrintVMOptions, trueInDebug, \
2076 2089 "print VM flag settings") \
2077 2090 \
2078 2091 diagnostic(bool, SerializeVMOutput, true, \
2079 2092 "Use a mutex to serialize output to tty and hotspot.log") \
2080 2093 \
2081 2094 diagnostic(bool, DisplayVMOutput, true, \
2082 2095 "Display all VM output on the tty, independently of LogVMOutput") \
2083 2096 \
2084 2097 diagnostic(bool, LogVMOutput, trueInDebug, \
2085 2098 "Save VM output to hotspot.log, or to LogFile") \
2086 2099 \
2087 2100 diagnostic(ccstr, LogFile, NULL, \
2088 2101 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2089 2102 \
2090 2103 product(ccstr, ErrorFile, NULL, \
2091 2104 "If an error occurs, save the error data to this file " \
2092 2105 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2093 2106 \
2094 2107 product(bool, DisplayVMOutputToStderr, false, \
2095 2108 "If DisplayVMOutput is true, display all VM output to stderr") \
2096 2109 \
2097 2110 product(bool, DisplayVMOutputToStdout, false, \
2098 2111 "If DisplayVMOutput is true, display all VM output to stdout") \
2099 2112 \
2100 2113 product(bool, UseHeavyMonitors, false, \
2101 2114 "use heavyweight instead of lightweight Java monitors") \
2102 2115 \
2103 2116 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2104 2117 "print histogram of the symbol table") \
2105 2118 \
2106 2119 notproduct(bool, ExitVMOnVerifyError, false, \
2107 2120 "standard exit from VM if bytecode verify error " \
2108 2121 "(only in debug mode)") \
2109 2122 \
2110 2123 notproduct(ccstr, AbortVMOnException, NULL, \
2111 2124 "Call fatal if this exception is thrown. Example: " \
2112 2125 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2113 2126 \
2114 2127 develop(bool, DebugVtables, false, \
2115 2128 "add debugging code to vtable dispatch") \
2116 2129 \
2117 2130 develop(bool, PrintVtables, false, \
2118 2131 "print vtables when printing klass") \
2119 2132 \
2120 2133 notproduct(bool, PrintVtableStats, false, \
2121 2134 "print vtables stats at end of run") \
2122 2135 \
2123 2136 develop(bool, TraceCreateZombies, false, \
2124 2137 "trace creation of zombie nmethods") \
2125 2138 \
2126 2139 notproduct(bool, IgnoreLockingAssertions, false, \
2127 2140 "disable locking assertions (for speed)") \
2128 2141 \
2129 2142 notproduct(bool, VerifyLoopOptimizations, false, \
2130 2143 "verify major loop optimizations") \
2131 2144 \
2132 2145 product(bool, RangeCheckElimination, true, \
2133 2146 "Split loop iterations to eliminate range checks") \
2134 2147 \
2135 2148 develop_pd(bool, UncommonNullCast, \
2136 2149 "track occurrences of null in casts; adjust compiler tactics") \
2137 2150 \
2138 2151 develop(bool, TypeProfileCasts, true, \
2139 2152 "treat casts like calls for purposes of type profiling") \
2140 2153 \
2141 2154 develop(bool, MonomorphicArrayCheck, true, \
2142 2155 "Uncommon-trap array store checks that require full type check") \
2143 2156 \
2144 2157 develop(bool, DelayCompilationDuringStartup, true, \
2145 2158 "Delay invoking the compiler until main application class is " \
2146 2159 "loaded") \
2147 2160 \
2148 2161 develop(bool, CompileTheWorld, false, \
2149 2162 "Compile all methods in all classes in bootstrap class path " \
2150 2163 "(stress test)") \
2151 2164 \
2152 2165 develop(bool, CompileTheWorldPreloadClasses, true, \
2153 2166 "Preload all classes used by a class before start loading") \
2154 2167 \
2155 2168 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \
2156 2169 "Compile all methods although class initializer failed") \
2157 2170 \
2158 2171 develop(bool, TraceIterativeGVN, false, \
2159 2172 "Print progress during Iterative Global Value Numbering") \
2160 2173 \
2161 2174 develop(bool, FillDelaySlots, true, \
2162 2175 "Fill delay slots (on SPARC only)") \
2163 2176 \
2164 2177 develop(bool, VerifyIterativeGVN, false, \
2165 2178 "Verify Def-Use modifications during sparse Iterative Global " \
2166 2179 "Value Numbering") \
2167 2180 \
2168 2181 notproduct(bool, TracePhaseCCP, false, \
2169 2182 "Print progress during Conditional Constant Propagation") \
2170 2183 \
2171 2184 develop(bool, TimeLivenessAnalysis, false, \
2172 2185 "Time computation of bytecode liveness analysis") \
2173 2186 \
2174 2187 develop(bool, TraceLivenessGen, false, \
2175 2188 "Trace the generation of liveness analysis information") \
2176 2189 \
2177 2190 notproduct(bool, TraceLivenessQuery, false, \
2178 2191 "Trace queries of liveness analysis information") \
2179 2192 \
2180 2193 notproduct(bool, CollectIndexSetStatistics, false, \
2181 2194 "Collect information about IndexSets") \
2182 2195 \
2183 2196 develop(bool, PrintDominators, false, \
2184 2197 "Print out dominator trees for GVN") \
2185 2198 \
2186 2199 develop(bool, UseLoopSafepoints, true, \
2187 2200 "Generate Safepoint nodes in every loop") \
2188 2201 \
2189 2202 notproduct(bool, TraceCISCSpill, false, \
2190 2203 "Trace allocators use of cisc spillable instructions") \
2191 2204 \
2192 2205 notproduct(bool, TraceSpilling, false, \
2193 2206 "Trace spilling") \
2194 2207 \
2195 2208 develop(bool, DeutschShiffmanExceptions, true, \
2196 2209 "Fast check to find exception handler for precisely typed " \
2197 2210 "exceptions") \
2198 2211 \
2199 2212 product(bool, SplitIfBlocks, true, \
2200 2213 "Clone compares and control flow through merge points to fold " \
2201 2214 "some branches") \
2202 2215 \
2203 2216 develop(intx, FastAllocateSizeLimit, 128*K, \
2204 2217 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2205 2218 "Inline allocations larger than this in doublewords must go slow")\
2206 2219 \
2207 2220 product(bool, AggressiveOpts, false, \
2208 2221 "Enable aggressive optimizations - see arguments.cpp") \
2209 2222 \
2210 2223 /* statistics */ \
2211 2224 develop(bool, UseVTune, false, \
2212 2225 "enable support for Intel's VTune profiler") \
2213 2226 \
2214 2227 develop(bool, CountCompiledCalls, false, \
2215 2228 "counts method invocations") \
2216 2229 \
2217 2230 notproduct(bool, CountRuntimeCalls, false, \
2218 2231 "counts VM runtime calls") \
2219 2232 \
2220 2233 develop(bool, CountJNICalls, false, \
2221 2234 "counts jni method invocations") \
2222 2235 \
2223 2236 notproduct(bool, CountJVMCalls, false, \
2224 2237 "counts jvm method invocations") \
2225 2238 \
2226 2239 notproduct(bool, CountRemovableExceptions, false, \
2227 2240 "count exceptions that could be replaced by branches due to " \
2228 2241 "inlining") \
2229 2242 \
2230 2243 notproduct(bool, ICMissHistogram, false, \
2231 2244 "produce histogram of IC misses") \
2232 2245 \
2233 2246 notproduct(bool, PrintClassStatistics, false, \
2234 2247 "prints class statistics at end of run") \
2235 2248 \
2236 2249 notproduct(bool, PrintMethodStatistics, false, \
2237 2250 "prints method statistics at end of run") \
2238 2251 \
2239 2252 /* interpreter */ \
2240 2253 develop(bool, ClearInterpreterLocals, false, \
2241 2254 "Always clear local variables of interpreter activations upon " \
2242 2255 "entry") \
2243 2256 \
2244 2257 product_pd(bool, RewriteBytecodes, \
2245 2258 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2246 2259 \
2247 2260 product_pd(bool, RewriteFrequentPairs, \
2248 2261 "Rewrite frequently used bytecode pairs into a single bytecode") \
2249 2262 \
2250 2263 product(bool, PrintInterpreter, false, \
2251 2264 "Prints the generated interpreter code") \
2252 2265 \
2253 2266 product(bool, UseInterpreter, true, \
2254 2267 "Use interpreter for non-compiled methods") \
2255 2268 \
2256 2269 develop(bool, UseFastSignatureHandlers, true, \
2257 2270 "Use fast signature handlers for native calls") \
2258 2271 \
2259 2272 develop(bool, UseV8InstrsOnly, false, \
2260 2273 "Use SPARC-V8 Compliant instruction subset") \
2261 2274 \
2262 2275 product(bool, UseNiagaraInstrs, false, \
2263 2276 "Use Niagara-efficient instruction subset") \
2264 2277 \
2265 2278 develop(bool, UseCASForSwap, false, \
2266 2279 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
2267 2280 \
2268 2281 product(bool, UseLoopCounter, true, \
2269 2282 "Increment invocation counter on backward branch") \
2270 2283 \
2271 2284 product(bool, UseFastEmptyMethods, true, \
2272 2285 "Use fast method entry code for empty methods") \
2273 2286 \
2274 2287 product(bool, UseFastAccessorMethods, true, \
2275 2288 "Use fast method entry code for accessor methods") \
2276 2289 \
2277 2290 product_pd(bool, UseOnStackReplacement, \
2278 2291 "Use on stack replacement, calls runtime if invoc. counter " \
2279 2292 "overflows in loop") \
2280 2293 \
2281 2294 notproduct(bool, TraceOnStackReplacement, false, \
2282 2295 "Trace on stack replacement") \
2283 2296 \
2284 2297 develop(bool, PoisonOSREntry, true, \
2285 2298 "Detect abnormal calls to OSR code") \
2286 2299 \
2287 2300 product_pd(bool, PreferInterpreterNativeStubs, \
2288 2301 "Use always interpreter stubs for native methods invoked via " \
2289 2302 "interpreter") \
2290 2303 \
2291 2304 develop(bool, CountBytecodes, false, \
2292 2305 "Count number of bytecodes executed") \
2293 2306 \
2294 2307 develop(bool, PrintBytecodeHistogram, false, \
2295 2308 "Print histogram of the executed bytecodes") \
2296 2309 \
2297 2310 develop(bool, PrintBytecodePairHistogram, false, \
2298 2311 "Print histogram of the executed bytecode pairs") \
2299 2312 \
2300 2313 develop(bool, PrintSignatureHandlers, false, \
2301 2314 "Print code generated for native method signature handlers") \
2302 2315 \
2303 2316 develop(bool, VerifyOops, false, \
2304 2317 "Do plausibility checks for oops") \
2305 2318 \
2306 2319 develop(bool, CheckUnhandledOops, false, \
2307 2320 "Check for unhandled oops in VM code") \
2308 2321 \
2309 2322 develop(bool, VerifyJNIFields, trueInDebug, \
2310 2323 "Verify jfieldIDs for instance fields") \
2311 2324 \
2312 2325 notproduct(bool, VerifyJNIEnvThread, false, \
2313 2326 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2314 2327 "from JNI") \
2315 2328 \
2316 2329 develop(bool, VerifyFPU, false, \
2317 2330 "Verify FPU state (check for NaN's, etc.)") \
2318 2331 \
2319 2332 develop(bool, VerifyThread, false, \
2320 2333 "Watch the thread register for corruption (SPARC only)") \
2321 2334 \
2322 2335 develop(bool, VerifyActivationFrameSize, false, \
2323 2336 "Verify that activation frame didn't become smaller than its " \
2324 2337 "minimal size") \
2325 2338 \
2326 2339 develop(bool, TraceFrequencyInlining, false, \
2327 2340 "Trace frequency based inlining") \
2328 2341 \
2329 2342 notproduct(bool, TraceTypeProfile, false, \
2330 2343 "Trace type profile") \
2331 2344 \
2332 2345 develop_pd(bool, InlineIntrinsics, \
2333 2346 "Inline intrinsics that can be statically resolved") \
2334 2347 \
2335 2348 product_pd(bool, ProfileInterpreter, \
2336 2349 "Profile at the bytecode level during interpretation") \
2337 2350 \
2338 2351 develop_pd(bool, ProfileTraps, \
2339 2352 "Profile deoptimization traps at the bytecode level") \
2340 2353 \
2341 2354 product(intx, ProfileMaturityPercentage, 20, \
2342 2355 "number of method invocations/branches (expressed as % of " \
2343 2356 "CompileThreshold) before using the method's profile") \
2344 2357 \
2345 2358 develop(bool, PrintMethodData, false, \
2346 2359 "Print the results of +ProfileInterpreter at end of run") \
2347 2360 \
2348 2361 develop(bool, VerifyDataPointer, trueInDebug, \
2349 2362 "Verify the method data pointer during interpreter profiling") \
2350 2363 \
2351 2364 develop(bool, VerifyCompiledCode, false, \
2352 2365 "Include miscellaneous runtime verifications in nmethod code; " \
2353 2366 "off by default because it disturbs nmethod size heuristics.") \
2354 2367 \
2355 2368 \
2356 2369 /* compilation */ \
2357 2370 product(bool, UseCompiler, true, \
2358 2371 "use compilation") \
2359 2372 \
2360 2373 develop(bool, TraceCompilationPolicy, false, \
2361 2374 "Trace compilation policy") \
2362 2375 \
2363 2376 develop(bool, TimeCompilationPolicy, false, \
2364 2377 "Time the compilation policy") \
2365 2378 \
2366 2379 product(bool, UseCounterDecay, true, \
2367 2380 "adjust recompilation counters") \
2368 2381 \
2369 2382 develop(intx, CounterHalfLifeTime, 30, \
2370 2383 "half-life time of invocation counters (in secs)") \
2371 2384 \
2372 2385 develop(intx, CounterDecayMinIntervalLength, 500, \
2373 2386 "Min. ms. between invocation of CounterDecay") \
2374 2387 \
2375 2388 product(bool, AlwaysCompileLoopMethods, false, \
2376 2389 "when using recompilation, never interpret methods " \
2377 2390 "containing loops") \
2378 2391 \
2379 2392 product(bool, DontCompileHugeMethods, true, \
2380 2393 "don't compile methods > HugeMethodLimit") \
2381 2394 \
2382 2395 /* Bytecode escape analysis estimation. */ \
2383 2396 product(bool, EstimateArgEscape, true, \
2384 2397 "Analyze bytecodes to estimate escape state of arguments") \
2385 2398 \
2386 2399 product(intx, BCEATraceLevel, 0, \
2387 2400 "How much tracing to do of bytecode escape analysis estimates") \
2388 2401 \
2389 2402 product(intx, MaxBCEAEstimateLevel, 5, \
2390 2403 "Maximum number of nested calls that are analyzed by BC EA.") \
2391 2404 \
2392 2405 product(intx, MaxBCEAEstimateSize, 150, \
2393 2406 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2394 2407 \
2395 2408 product(intx, AllocatePrefetchStyle, 1, \
2396 2409 "0 = no prefetch, " \
2397 2410 "1 = prefetch instructions for each allocation, " \
2398 2411 "2 = use TLAB watermark to gate allocation prefetch") \
2399 2412 \
2400 2413 product(intx, AllocatePrefetchDistance, -1, \
2401 2414 "Distance to prefetch ahead of allocation pointer") \
2402 2415 \
2403 2416 product(intx, AllocatePrefetchLines, 1, \
2404 2417 "Number of lines to prefetch ahead of allocation pointer") \
2405 2418 \
2406 2419 product(intx, AllocatePrefetchStepSize, 16, \
2407 2420 "Step size in bytes of sequential prefetch instructions") \
2408 2421 \
2409 2422 product(intx, AllocatePrefetchInstr, 0, \
2410 2423 "Prefetch instruction to prefetch ahead of allocation pointer") \
2411 2424 \
2412 2425 product(intx, ReadPrefetchInstr, 0, \
2413 2426 "Prefetch instruction to prefetch ahead") \
2414 2427 \
2415 2428 /* deoptimization */ \
2416 2429 develop(bool, TraceDeoptimization, false, \
2417 2430 "Trace deoptimization") \
2418 2431 \
2419 2432 develop(bool, DebugDeoptimization, false, \
2420 2433 "Tracing various information while debugging deoptimization") \
2421 2434 \
2422 2435 product(intx, SelfDestructTimer, 0, \
2423 2436 "Will cause VM to terminate after a given time (in minutes) " \
2424 2437 "(0 means off)") \
2425 2438 \
2426 2439 product(intx, MaxJavaStackTraceDepth, 1024, \
2427 2440 "Max. no. of lines in the stack trace for Java exceptions " \
2428 2441 "(0 means all)") \
2429 2442 \
2430 2443 develop(intx, GuaranteedSafepointInterval, 1000, \
2431 2444 "Guarantee a safepoint (at least) every so many milliseconds " \
2432 2445 "(0 means none)") \
2433 2446 \
2434 2447 product(intx, SafepointTimeoutDelay, 10000, \
2435 2448 "Delay in milliseconds for option SafepointTimeout") \
2436 2449 \
2437 2450 product(intx, NmethodSweepFraction, 4, \
2438 2451 "Number of invocations of sweeper to cover all nmethods") \
2439 2452 \
2440 2453 notproduct(intx, MemProfilingInterval, 500, \
2441 2454 "Time between each invocation of the MemProfiler") \
2442 2455 \
2443 2456 develop(intx, MallocCatchPtr, -1, \
2444 2457 "Hit breakpoint when mallocing/freeing this pointer") \
2445 2458 \
2446 2459 notproduct(intx, AssertRepeat, 1, \
2447 2460 "number of times to evaluate expression in assert " \
2448 2461 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2449 2462 \
2450 2463 notproduct(ccstrlist, SuppressErrorAt, "", \
2451 2464 "List of assertions (file:line) to muzzle") \
2452 2465 \
2453 2466 notproduct(uintx, HandleAllocationLimit, 1024, \
2454 2467 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2455 2468 "is used") \
2456 2469 \
2457 2470 develop(uintx, TotalHandleAllocationLimit, 1024, \
2458 2471 "Threshold for total handle allocation when " \
2459 2472 "+TraceHandleAllocation is used") \
2460 2473 \
2461 2474 develop(intx, StackPrintLimit, 100, \
2462 2475 "number of stack frames to print in VM-level stack dump") \
2463 2476 \
2464 2477 notproduct(intx, MaxElementPrintSize, 256, \
2465 2478 "maximum number of elements to print") \
2466 2479 \
2467 2480 notproduct(intx, MaxSubklassPrintSize, 4, \
2468 2481 "maximum number of subklasses to print when printing klass") \
2469 2482 \
2470 2483 develop(intx, MaxInlineLevel, 9, \
2471 2484 "maximum number of nested calls that are inlined") \
2472 2485 \
2473 2486 develop(intx, MaxRecursiveInlineLevel, 1, \
2474 2487 "maximum number of nested recursive calls that are inlined") \
2475 2488 \
2476 2489 develop(intx, InlineSmallCode, 1000, \
2477 2490 "Only inline already compiled methods if their code size is " \
2478 2491 "less than this") \
2479 2492 \
2480 2493 product(intx, MaxInlineSize, 35, \
2481 2494 "maximum bytecode size of a method to be inlined") \
2482 2495 \
2483 2496 product_pd(intx, FreqInlineSize, \
2484 2497 "maximum bytecode size of a frequent method to be inlined") \
2485 2498 \
2486 2499 develop(intx, MaxTrivialSize, 6, \
2487 2500 "maximum bytecode size of a trivial method to be inlined") \
2488 2501 \
2489 2502 develop(intx, MinInliningThreshold, 250, \
2490 2503 "min. invocation count a method needs to have to be inlined") \
2491 2504 \
2492 2505 develop(intx, AlignEntryCode, 4, \
2493 2506 "aligns entry code to specified value (in bytes)") \
2494 2507 \
2495 2508 develop(intx, MethodHistogramCutoff, 100, \
2496 2509 "cutoff value for method invoc. histogram (+CountCalls)") \
2497 2510 \
2498 2511 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
2499 2512 "# of interpreted methods to show in profile") \
2500 2513 \
2501 2514 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
2502 2515 "# of compiled methods to show in profile") \
2503 2516 \
2504 2517 develop(intx, ProfilerNumberOfStubMethods, 25, \
2505 2518 "# of stub methods to show in profile") \
2506 2519 \
2507 2520 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
2508 2521 "# of runtime stub nodes to show in profile") \
2509 2522 \
2510 2523 product(intx, ProfileIntervalsTicks, 100, \
2511 2524 "# of ticks between printing of interval profile " \
2512 2525 "(+ProfileIntervals)") \
2513 2526 \
2514 2527 notproduct(intx, ScavengeALotInterval, 1, \
2515 2528 "Interval between which scavenge will occur with +ScavengeALot") \
2516 2529 \
2517 2530 notproduct(intx, FullGCALotInterval, 1, \
2518 2531 "Interval between which full gc will occur with +FullGCALot") \
2519 2532 \
2520 2533 notproduct(intx, FullGCALotStart, 0, \
2521 2534 "For which invocation to start FullGCAlot") \
2522 2535 \
2523 2536 notproduct(intx, FullGCALotDummies, 32*K, \
2524 2537 "Dummy object allocated with +FullGCALot, forcing all objects " \
2525 2538 "to move") \
2526 2539 \
2527 2540 develop(intx, DontYieldALotInterval, 10, \
2528 2541 "Interval between which yields will be dropped (milliseconds)") \
2529 2542 \
2530 2543 develop(intx, MinSleepInterval, 1, \
2531 2544 "Minimum sleep() interval (milliseconds) when " \
2532 2545 "ConvertSleepToYield is off (used for SOLARIS)") \
2533 2546 \
2534 2547 product(intx, EventLogLength, 2000, \
2535 2548 "maximum nof events in event log") \
2536 2549 \
2537 2550 develop(intx, ProfilerPCTickThreshold, 15, \
2538 2551 "Number of ticks in a PC buckets to be a hotspot") \
2539 2552 \
2540 2553 notproduct(intx, DeoptimizeALotInterval, 5, \
2541 2554 "Number of exits until DeoptimizeALot kicks in") \
2542 2555 \
2543 2556 notproduct(intx, ZombieALotInterval, 5, \
2544 2557 "Number of exits until ZombieALot kicks in") \
2545 2558 \
2546 2559 develop(bool, StressNonEntrant, false, \
2547 2560 "Mark nmethods non-entrant at registration") \
2548 2561 \
2549 2562 diagnostic(intx, MallocVerifyInterval, 0, \
2550 2563 "if non-zero, verify C heap after every N calls to " \
2551 2564 "malloc/realloc/free") \
2552 2565 \
2553 2566 diagnostic(intx, MallocVerifyStart, 0, \
2554 2567 "if non-zero, start verifying C heap after Nth call to " \
2555 2568 "malloc/realloc/free") \
2556 2569 \
2557 2570 product(intx, TypeProfileWidth, 2, \
2558 2571 "number of receiver types to record in call/cast profile") \
2559 2572 \
2560 2573 develop(intx, BciProfileWidth, 2, \
2561 2574 "number of return bci's to record in ret profile") \
2562 2575 \
2563 2576 product(intx, PerMethodRecompilationCutoff, 400, \
2564 2577 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
2565 2578 \
2566 2579 product(intx, PerBytecodeRecompilationCutoff, 100, \
2567 2580 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
2568 2581 \
2569 2582 product(intx, PerMethodTrapLimit, 100, \
2570 2583 "Limit on traps (of one kind) in a method (includes inlines)") \
2571 2584 \
2572 2585 product(intx, PerBytecodeTrapLimit, 4, \
2573 2586 "Limit on traps (of one kind) at a particular BCI") \
2574 2587 \
2575 2588 develop(intx, FreqCountInvocations, 1, \
2576 2589 "Scaling factor for branch frequencies (deprecated)") \
2577 2590 \
2578 2591 develop(intx, InlineFrequencyRatio, 20, \
2579 2592 "Ratio of call site execution to caller method invocation") \
2580 2593 \
2581 2594 develop_pd(intx, InlineFrequencyCount, \
2582 2595 "Count of call site execution necessary to trigger frequent " \
2583 2596 "inlining") \
2584 2597 \
2585 2598 develop(intx, InlineThrowCount, 50, \
2586 2599 "Force inlining of interpreted methods that throw this often") \
2587 2600 \
2588 2601 develop(intx, InlineThrowMaxSize, 200, \
2589 2602 "Force inlining of throwing methods smaller than this") \
2590 2603 \
2591 2604 product(intx, AliasLevel, 3, \
2592 2605 "0 for no aliasing, 1 for oop/field/static/array split, " \
2593 2606 "2 for class split, 3 for unique instances") \
2594 2607 \
2595 2608 develop(bool, VerifyAliases, false, \
2596 2609 "perform extra checks on the results of alias analysis") \
2597 2610 \
2598 2611 develop(intx, ProfilerNodeSize, 1024, \
2599 2612 "Size in K to allocate for the Profile Nodes of each thread") \
2600 2613 \
2601 2614 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \
2602 2615 "Number of times to spin wait on a v8 atomic operation lock") \
2603 2616 \
2604 2617 product(intx, ReadSpinIterations, 100, \
2605 2618 "Number of read attempts before a yield (spin inner loop)") \
2606 2619 \
2607 2620 product_pd(intx, PreInflateSpin, \
2608 2621 "Number of times to spin wait before inflation") \
2609 2622 \
2610 2623 product(intx, PreBlockSpin, 10, \
2611 2624 "Number of times to spin in an inflated lock before going to " \
2612 2625 "an OS lock") \
2613 2626 \
2614 2627 /* gc parameters */ \
2615 2628 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \
2616 2629 "Default maximum size for object heap (in bytes)") \
2617 2630 \
2618 2631 product_pd(uintx, NewSize, \
2619 2632 "Default size of new generation (in bytes)") \
2620 2633 \
2621 2634 product(uintx, MaxNewSize, max_uintx, \
2622 2635 "Maximum size of new generation (in bytes)") \
2623 2636 \
2624 2637 product(uintx, PretenureSizeThreshold, 0, \
2625 2638 "Max size in bytes of objects allocated in DefNew generation") \
2626 2639 \
2627 2640 product_pd(uintx, TLABSize, \
2628 2641 "Default (or starting) size of TLAB (in bytes)") \
2629 2642 \
2630 2643 product(uintx, MinTLABSize, 2*K, \
2631 2644 "Minimum allowed TLAB size (in bytes)") \
2632 2645 \
2633 2646 product(uintx, TLABAllocationWeight, 35, \
2634 2647 "Allocation averaging weight") \
2635 2648 \
2636 2649 product(uintx, TLABWasteTargetPercent, 1, \
2637 2650 "Percentage of Eden that can be wasted") \
2638 2651 \
2639 2652 product(uintx, TLABRefillWasteFraction, 64, \
2640 2653 "Max TLAB waste at a refill (internal fragmentation)") \
2641 2654 \
2642 2655 product(uintx, TLABWasteIncrement, 4, \
2643 2656 "Increment allowed waste at slow allocation") \
2644 2657 \
2645 2658 product_pd(intx, SurvivorRatio, \
2646 2659 "Ratio of eden/survivor space size") \
2647 2660 \
2648 2661 product_pd(intx, NewRatio, \
2649 2662 "Ratio of new/old generation sizes") \
2650 2663 \
2651 2664 product(uintx, MaxLiveObjectEvacuationRatio, 100, \
2652 2665 "Max percent of eden objects that will be live at scavenge") \
2653 2666 \
2654 2667 product_pd(uintx, NewSizeThreadIncrease, \
2655 2668 "Additional size added to desired new generation size per " \
2656 2669 "non-daemon thread (in bytes)") \
2657 2670 \
2658 2671 product(uintx, OldSize, ScaleForWordSize(4096*K), \
2659 2672 "Default size of tenured generation (in bytes)") \
2660 2673 \
2661 2674 product_pd(uintx, PermSize, \
2662 2675 "Default size of permanent generation (in bytes)") \
2663 2676 \
2664 2677 product_pd(uintx, MaxPermSize, \
2665 2678 "Maximum size of permanent generation (in bytes)") \
2666 2679 \
2667 2680 product(uintx, MinHeapFreeRatio, 40, \
2668 2681 "Min percentage of heap free after GC to avoid expansion") \
2669 2682 \
2670 2683 product(uintx, MaxHeapFreeRatio, 70, \
2671 2684 "Max percentage of heap free after GC to avoid shrinking") \
2672 2685 \
2673 2686 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
2674 2687 "Number of milliseconds per MB of free space in the heap") \
2675 2688 \
2676 2689 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
2677 2690 "Min change in heap space due to GC (in bytes)") \
2678 2691 \
2679 2692 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \
2680 2693 "Min expansion of permanent heap (in bytes)") \
2681 2694 \
2682 2695 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \
2683 2696 "Max expansion of permanent heap without full GC (in bytes)") \
2684 2697 \
2685 2698 product(intx, QueuedAllocationWarningCount, 0, \
2686 2699 "Number of times an allocation that queues behind a GC " \
2687 2700 "will retry before printing a warning") \
2688 2701 \
2689 2702 diagnostic(uintx, VerifyGCStartAt, 0, \
2690 2703 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
2691 2704 \
2692 2705 diagnostic(intx, VerifyGCLevel, 0, \
2693 2706 "Generation level at which to start +VerifyBefore/AfterGC") \
2694 2707 \
2695 2708 develop(uintx, ExitAfterGCNum, 0, \
2696 2709 "If non-zero, exit after this GC.") \
2697 2710 \
2698 2711 product(intx, MaxTenuringThreshold, 15, \
2699 2712 "Maximum value for tenuring threshold") \
2700 2713 \
2701 2714 product(intx, InitialTenuringThreshold, 7, \
2702 2715 "Initial value for tenuring threshold") \
2703 2716 \
2704 2717 product(intx, TargetSurvivorRatio, 50, \
2705 2718 "Desired percentage of survivor space used after scavenge") \
2706 2719 \
2707 2720 product(intx, MarkSweepDeadRatio, 5, \
2708 2721 "Percentage (0-100) of the old gen allowed as dead wood." \
2709 2722 "Serial mark sweep treats this as both the min and max value." \
2710 2723 "CMS uses this value only if it falls back to mark sweep." \
2711 2724 "Par compact uses a variable scale based on the density of the" \
2712 2725 "generation and treats this as the max value when the heap is" \
2713 2726 "either completely full or completely empty. Par compact also" \
2714 2727 "has a smaller default value; see arguments.cpp.") \
2715 2728 \
2716 2729 product(intx, PermMarkSweepDeadRatio, 20, \
2717 2730 "Percentage (0-100) of the perm gen allowed as dead wood." \
2718 2731 "See MarkSweepDeadRatio for collector-specific comments.") \
2719 2732 \
2720 2733 product(intx, MarkSweepAlwaysCompactCount, 4, \
2721 2734 "How often should we fully compact the heap (ignoring the dead " \
2722 2735 "space parameters)") \
2723 2736 \
2724 2737 product(intx, PrintCMSStatistics, 0, \
2725 2738 "Statistics for CMS") \
2726 2739 \
2727 2740 product(bool, PrintCMSInitiationStatistics, false, \
2728 2741 "Statistics for initiating a CMS collection") \
2729 2742 \
2730 2743 product(intx, PrintFLSStatistics, 0, \
2731 2744 "Statistics for CMS' FreeListSpace") \
2732 2745 \
2733 2746 product(intx, PrintFLSCensus, 0, \
2734 2747 "Census for CMS' FreeListSpace") \
2735 2748 \
2736 2749 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
2737 2750 "Delay in ms between expansion and allocation") \
2738 2751 \
2739 2752 product(intx, DeferThrSuspendLoopCount, 4000, \
2740 2753 "(Unstable) Number of times to iterate in safepoint loop " \
2741 2754 " before blocking VM threads ") \
2742 2755 \
2743 2756 product(intx, DeferPollingPageLoopCount, -1, \
2744 2757 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
2745 2758 "before changing safepoint polling page to RO ") \
2746 2759 \
2747 2760 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
2748 2761 \
2749 2762 product(bool, UseDepthFirstScavengeOrder, true, \
2750 2763 "true: the scavenge order will be depth-first, " \
2751 2764 "false: the scavenge order will be breadth-first") \
2752 2765 \
2753 2766 product(bool, PSChunkLargeArrays, true, \
2754 2767 "true: process large arrays in chunks") \
2755 2768 \
2756 2769 product(uintx, GCDrainStackTargetSize, 64, \
2757 2770 "how many entries we'll try to leave on the stack during " \
2758 2771 "parallel GC") \
2759 2772 \
2760 2773 /* stack parameters */ \
2761 2774 product_pd(intx, StackYellowPages, \
2762 2775 "Number of yellow zone (recoverable overflows) pages") \
2763 2776 \
2764 2777 product_pd(intx, StackRedPages, \
2765 2778 "Number of red zone (unrecoverable overflows) pages") \
2766 2779 \
2767 2780 product_pd(intx, StackShadowPages, \
2768 2781 "Number of shadow zone (for overflow checking) pages" \
2769 2782 " this should exceed the depth of the VM and native call stack") \
2770 2783 \
2771 2784 product_pd(intx, ThreadStackSize, \
2772 2785 "Thread Stack Size (in Kbytes)") \
2773 2786 \
2774 2787 product_pd(intx, VMThreadStackSize, \
2775 2788 "Non-Java Thread Stack Size (in Kbytes)") \
2776 2789 \
2777 2790 product_pd(intx, CompilerThreadStackSize, \
2778 2791 "Compiler Thread Stack Size (in Kbytes)") \
2779 2792 \
2780 2793 develop_pd(uintx, JVMInvokeMethodSlack, \
2781 2794 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
2782 2795 \
2783 2796 product(uintx, ThreadSafetyMargin, 50*M, \
2784 2797 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
2785 2798 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
2786 2799 "disable this feature") \
2787 2800 \
2788 2801 /* code cache parameters */ \
2789 2802 develop(uintx, CodeCacheSegmentSize, 64, \
2790 2803 "Code cache segment size (in bytes) - smallest unit of " \
2791 2804 "allocation") \
2792 2805 \
2793 2806 develop_pd(intx, CodeEntryAlignment, \
2794 2807 "Code entry alignment for generated code (in bytes)") \
2795 2808 \
2796 2809 product_pd(uintx, InitialCodeCacheSize, \
2797 2810 "Initial code cache size (in bytes)") \
2798 2811 \
2799 2812 product_pd(uintx, ReservedCodeCacheSize, \
2800 2813 "Reserved code cache size (in bytes) - maximum code cache size") \
2801 2814 \
2802 2815 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
2803 2816 "When less than X space left, we stop compiling.") \
2804 2817 \
2805 2818 product_pd(uintx, CodeCacheExpansionSize, \
2806 2819 "Code cache expansion size (in bytes)") \
2807 2820 \
2808 2821 develop_pd(uintx, CodeCacheMinBlockLength, \
2809 2822 "Minimum number of segments in a code cache block.") \
2810 2823 \
2811 2824 notproduct(bool, ExitOnFullCodeCache, false, \
2812 2825 "Exit the VM if we fill the code cache.") \
2813 2826 \
2814 2827 /* interpreter debugging */ \
2815 2828 develop(intx, BinarySwitchThreshold, 5, \
2816 2829 "Minimal number of lookupswitch entries for rewriting to binary " \
2817 2830 "switch") \
2818 2831 \
2819 2832 develop(intx, StopInterpreterAt, 0, \
2820 2833 "Stops interpreter execution at specified bytecode number") \
2821 2834 \
2822 2835 develop(intx, TraceBytecodesAt, 0, \
2823 2836 "Traces bytecodes starting with specified bytecode number") \
2824 2837 \
2825 2838 /* compiler interface */ \
2826 2839 develop(intx, CIStart, 0, \
2827 2840 "the id of the first compilation to permit") \
2828 2841 \
2829 2842 develop(intx, CIStop, -1, \
2830 2843 "the id of the last compilation to permit") \
2831 2844 \
2832 2845 develop(intx, CIStartOSR, 0, \
2833 2846 "the id of the first osr compilation to permit " \
2834 2847 "(CICountOSR must be on)") \
2835 2848 \
2836 2849 develop(intx, CIStopOSR, -1, \
2837 2850 "the id of the last osr compilation to permit " \
2838 2851 "(CICountOSR must be on)") \
2839 2852 \
2840 2853 develop(intx, CIBreakAtOSR, -1, \
2841 2854 "id of osr compilation to break at") \
2842 2855 \
2843 2856 develop(intx, CIBreakAt, -1, \
2844 2857 "id of compilation to break at") \
2845 2858 \
2846 2859 product(ccstrlist, CompileOnly, "", \
2847 2860 "List of methods (pkg/class.name) to restrict compilation to") \
2848 2861 \
2849 2862 product(ccstr, CompileCommandFile, NULL, \
2850 2863 "Read compiler commands from this file [.hotspot_compiler]") \
2851 2864 \
2852 2865 product(ccstrlist, CompileCommand, "", \
2853 2866 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
2854 2867 \
2855 2868 product(bool, CICompilerCountPerCPU, false, \
2856 2869 "1 compiler thread for log(N CPUs)") \
2857 2870 \
2858 2871 develop(intx, CIFireOOMAt, -1, \
2859 2872 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
2860 2873 "(non-negative value throws OOM after this many CI accesses " \
2861 2874 "in each compile)") \
2862 2875 \
2863 2876 develop(intx, CIFireOOMAtDelay, -1, \
2864 2877 "Wait for this many CI accesses to occur in all compiles before " \
2865 2878 "beginning to throw OutOfMemoryErrors in each compile") \
2866 2879 \
2867 2880 /* Priorities */ \
2868 2881 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
2869 2882 \
2870 2883 product(intx, ThreadPriorityPolicy, 0, \
2871 2884 "0 : Normal. "\
2872 2885 " VM chooses priorities that are appropriate for normal "\
2873 2886 " applications. On Solaris NORM_PRIORITY and above are mapped "\
2874 2887 " to normal native priority. Java priorities below NORM_PRIORITY"\
2875 2888 " map to lower native priority values. On Windows applications"\
2876 2889 " are allowed to use higher native priorities. However, with "\
2877 2890 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
2878 2891 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
2879 2892 " interfere with system threads. On Linux thread priorities "\
2880 2893 " are ignored because the OS does not support static priority "\
2881 2894 " in SCHED_OTHER scheduling class which is the only choice for"\
2882 2895 " non-root, non-realtime applications. "\
2883 2896 "1 : Aggressive. "\
2884 2897 " Java thread priorities map over to the entire range of "\
2885 2898 " native thread priorities. Higher Java thread priorities map "\
2886 2899 " to higher native thread priorities. This policy should be "\
2887 2900 " used with care, as sometimes it can cause performance "\
2888 2901 " degradation in the application and/or the entire system. On "\
2889 2902 " Linux this policy requires root privilege.") \
2890 2903 \
2891 2904 product(bool, ThreadPriorityVerbose, false, \
2892 2905 "print priority changes") \
2893 2906 \
2894 2907 product(intx, DefaultThreadPriority, -1, \
2895 2908 "what native priority threads run at if not specified elsewhere (-1 means no change)") \
2896 2909 \
2897 2910 product(intx, CompilerThreadPriority, -1, \
2898 2911 "what priority should compiler threads run at (-1 means no change)") \
2899 2912 \
2900 2913 product(intx, VMThreadPriority, -1, \
2901 2914 "what priority should VM threads run at (-1 means no change)") \
2902 2915 \
2903 2916 product(bool, CompilerThreadHintNoPreempt, true, \
2904 2917 "(Solaris only) Give compiler threads an extra quanta") \
2905 2918 \
2906 2919 product(bool, VMThreadHintNoPreempt, false, \
2907 2920 "(Solaris only) Give VM thread an extra quanta") \
2908 2921 \
2909 2922 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2910 2923 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2911 2924 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2912 2925 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2913 2926 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2914 2927 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2915 2928 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2916 2929 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2917 2930 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2918 2931 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
2919 2932 \
2920 2933 /* compiler debugging */ \
2921 2934 notproduct(intx, CompileTheWorldStartAt, 1, \
2922 2935 "First class to consider when using +CompileTheWorld") \
2923 2936 \
2924 2937 notproduct(intx, CompileTheWorldStopAt, max_jint, \
2925 2938 "Last class to consider when using +CompileTheWorld") \
2926 2939 \
2927 2940 develop(intx, NewCodeParameter, 0, \
2928 2941 "Testing Only: Create a dedicated integer parameter before " \
2929 2942 "putback") \
2930 2943 \
2931 2944 /* new oopmap storage allocation */ \
2932 2945 develop(intx, MinOopMapAllocation, 8, \
2933 2946 "Minimum number of OopMap entries in an OopMapSet") \
2934 2947 \
2935 2948 /* Background Compilation */ \
2936 2949 develop(intx, LongCompileThreshold, 50, \
2937 2950 "Used with +TraceLongCompiles") \
2938 2951 \
2939 2952 product(intx, StarvationMonitorInterval, 200, \
2940 2953 "Pause between each check in ms") \
2941 2954 \
2942 2955 /* recompilation */ \
2943 2956 product_pd(intx, CompileThreshold, \
2944 2957 "number of interpreted method invocations before (re-)compiling") \
2945 2958 \
2946 2959 product_pd(intx, BackEdgeThreshold, \
2947 2960 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
2948 2961 \
2949 2962 product(intx, Tier1BytecodeLimit, 10, \
2950 2963 "Must have at least this many bytecodes before tier1" \
2951 2964 "invocation counters are used") \
2952 2965 \
2953 2966 product_pd(intx, Tier2CompileThreshold, \
2954 2967 "threshold at which a tier 2 compilation is invoked") \
2955 2968 \
2956 2969 product_pd(intx, Tier2BackEdgeThreshold, \
2957 2970 "Back edge threshold at which a tier 2 compilation is invoked") \
2958 2971 \
2959 2972 product_pd(intx, Tier3CompileThreshold, \
2960 2973 "threshold at which a tier 3 compilation is invoked") \
2961 2974 \
2962 2975 product_pd(intx, Tier3BackEdgeThreshold, \
2963 2976 "Back edge threshold at which a tier 3 compilation is invoked") \
2964 2977 \
2965 2978 product_pd(intx, Tier4CompileThreshold, \
2966 2979 "threshold at which a tier 4 compilation is invoked") \
2967 2980 \
2968 2981 product_pd(intx, Tier4BackEdgeThreshold, \
2969 2982 "Back edge threshold at which a tier 4 compilation is invoked") \
2970 2983 \
2971 2984 product_pd(bool, TieredCompilation, \
2972 2985 "Enable two-tier compilation") \
2973 2986 \
2974 2987 product(bool, StressTieredRuntime, false, \
2975 2988 "Alternate client and server compiler on compile requests") \
2976 2989 \
2977 2990 product_pd(intx, OnStackReplacePercentage, \
2978 2991 "NON_TIERED number of method invocations/branches (expressed as %"\
2979 2992 "of CompileThreshold) before (re-)compiling OSR code") \
2980 2993 \
2981 2994 product(intx, InterpreterProfilePercentage, 33, \
2982 2995 "NON_TIERED number of method invocations/branches (expressed as %"\
2983 2996 "of CompileThreshold) before profiling in the interpreter") \
2984 2997 \
2985 2998 develop(intx, MaxRecompilationSearchLength, 10, \
2986 2999 "max. # frames to inspect searching for recompilee") \
2987 3000 \
2988 3001 develop(intx, MaxInterpretedSearchLength, 3, \
2989 3002 "max. # interp. frames to skip when searching for recompilee") \
2990 3003 \
2991 3004 develop(intx, DesiredMethodLimit, 8000, \
2992 3005 "desired max. method size (in bytecodes) after inlining") \
2993 3006 \
2994 3007 develop(intx, HugeMethodLimit, 8000, \
2995 3008 "don't compile methods larger than this if " \
2996 3009 "+DontCompileHugeMethods") \
2997 3010 \
2998 3011 /* New JDK 1.4 reflection implementation */ \
2999 3012 \
3000 3013 develop(bool, UseNewReflection, true, \
3001 3014 "Temporary flag for transition to reflection based on dynamic " \
3002 3015 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3003 3016 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3004 3017 "changes were needed") \
3005 3018 \
3006 3019 develop(bool, VerifyReflectionBytecodes, false, \
3007 3020 "Force verification of 1.4 reflection bytecodes. Does not work " \
3008 3021 "in situations like that described in 4486457 or for " \
3009 3022 "constructors generated for serialization, so can not be enabled "\
3010 3023 "in product.") \
3011 3024 \
3012 3025 product(bool, ReflectionWrapResolutionErrors, true, \
3013 3026 "Temporary flag for transition to AbstractMethodError wrapped " \
3014 3027 "in InvocationTargetException. See 6531596") \
3015 3028 \
3016 3029 \
3017 3030 develop(intx, FastSuperclassLimit, 8, \
3018 3031 "Depth of hardwired instanceof accelerator array") \
3019 3032 \
3020 3033 /* Properties for Java libraries */ \
3021 3034 \
3022 3035 product(intx, MaxDirectMemorySize, -1, \
3023 3036 "Maximum total size of NIO direct-buffer allocations") \
3024 3037 \
3025 3038 /* temporary developer defined flags */ \
3026 3039 \
3027 3040 diagnostic(bool, UseNewCode, false, \
3028 3041 "Testing Only: Use the new version while testing") \
3029 3042 \
3030 3043 diagnostic(bool, UseNewCode2, false, \
3031 3044 "Testing Only: Use the new version while testing") \
3032 3045 \
3033 3046 diagnostic(bool, UseNewCode3, false, \
3034 3047 "Testing Only: Use the new version while testing") \
3035 3048 \
3036 3049 /* flags for performance data collection */ \
3037 3050 \
3038 3051 product(bool, UsePerfData, true, \
3039 3052 "Flag to disable jvmstat instrumentation for performance testing" \
3040 3053 "and problem isolation purposes.") \
3041 3054 \
3042 3055 product(bool, PerfDataSaveToFile, false, \
3043 3056 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3044 3057 \
3045 3058 product(ccstr, PerfDataSaveFile, NULL, \
3046 3059 "Save PerfData memory to the specified absolute pathname," \
3047 3060 "%p in the file name if present will be replaced by pid") \
3048 3061 \
3049 3062 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3050 3063 "Data sampling interval in milliseconds") \
3051 3064 \
3052 3065 develop(bool, PerfTraceDataCreation, false, \
3053 3066 "Trace creation of Performance Data Entries") \
3054 3067 \
3055 3068 develop(bool, PerfTraceMemOps, false, \
3056 3069 "Trace PerfMemory create/attach/detach calls") \
3057 3070 \
3058 3071 product(bool, PerfDisableSharedMem, false, \
3059 3072 "Store performance data in standard memory") \
3060 3073 \
3061 3074 product(intx, PerfDataMemorySize, 32*K, \
3062 3075 "Size of performance data memory region. Will be rounded " \
3063 3076 "up to a multiple of the native os page size.") \
3064 3077 \
3065 3078 product(intx, PerfMaxStringConstLength, 1024, \
3066 3079 "Maximum PerfStringConstant string length before truncation") \
3067 3080 \
3068 3081 product(bool, PerfAllowAtExitRegistration, false, \
3069 3082 "Allow registration of atexit() methods") \
3070 3083 \
3071 3084 product(bool, PerfBypassFileSystemCheck, false, \
3072 3085 "Bypass Win32 file system criteria checks (Windows Only)") \
3073 3086 \
3074 3087 product(intx, UnguardOnExecutionViolation, 0, \
3075 3088 "Unguard page and retry on no-execute fault (Win32 only)" \
3076 3089 "0=off, 1=conservative, 2=aggressive") \
3077 3090 \
3078 3091 /* Serviceability Support */ \
3079 3092 \
3080 3093 product(bool, ManagementServer, false, \
3081 3094 "Create JMX Management Server") \
3082 3095 \
3083 3096 product(bool, DisableAttachMechanism, false, \
3084 3097 "Disable mechanism that allows tools to attach to this VM") \
3085 3098 \
3086 3099 product(bool, StartAttachListener, false, \
3087 3100 "Always start Attach Listener at VM startup") \
3088 3101 \
3089 3102 manageable(bool, PrintConcurrentLocks, false, \
3090 3103 "Print java.util.concurrent locks in thread dump") \
3091 3104 \
3092 3105 /* Shared spaces */ \
3093 3106 \
3094 3107 product(bool, UseSharedSpaces, true, \
3095 3108 "Use shared spaces in the permanent generation") \
3096 3109 \
3097 3110 product(bool, RequireSharedSpaces, false, \
3098 3111 "Require shared spaces in the permanent generation") \
3099 3112 \
3100 3113 product(bool, ForceSharedSpaces, false, \
3101 3114 "Require shared spaces in the permanent generation") \
3102 3115 \
3103 3116 product(bool, DumpSharedSpaces, false, \
3104 3117 "Special mode: JVM reads a class list, loads classes, builds " \
3105 3118 "shared spaces, and dumps the shared spaces to a file to be " \
3106 3119 "used in future JVM runs.") \
3107 3120 \
3108 3121 product(bool, PrintSharedSpaces, false, \
3109 3122 "Print usage of shared spaces") \
3110 3123 \
3111 3124 product(uintx, SharedDummyBlockSize, 512*M, \
3112 3125 "Size of dummy block used to shift heap addresses (in bytes)") \
3113 3126 \
3114 3127 product(uintx, SharedReadWriteSize, 12*M, \
3115 3128 "Size of read-write space in permanent generation (in bytes)") \
3116 3129 \
3117 3130 product(uintx, SharedReadOnlySize, 8*M, \
3118 3131 "Size of read-only space in permanent generation (in bytes)") \
3119 3132 \
3120 3133 product(uintx, SharedMiscDataSize, 4*M, \
3121 3134 "Size of the shared data area adjacent to the heap (in bytes)") \
3122 3135 \
3123 3136 product(uintx, SharedMiscCodeSize, 4*M, \
3124 3137 "Size of the shared code area adjacent to the heap (in bytes)") \
3125 3138 \
3126 3139 diagnostic(bool, SharedOptimizeColdStart, true, \
3127 3140 "At dump time, order shared objects to achieve better " \
3128 3141 "cold startup time.") \
3129 3142 \
3130 3143 develop(intx, SharedOptimizeColdStartPolicy, 2, \
3131 3144 "Reordering policy for SharedOptimizeColdStart " \
3132 3145 "0=favor classload-time locality, 1=balanced, " \
3133 3146 "2=favor runtime locality") \
3134 3147 \
3135 3148 diagnostic(bool, SharedSkipVerify, false, \
3136 3149 "Skip assert() and verify() which page-in unwanted shared " \
3137 3150 "objects. ") \
3138 3151 \
3139 3152 product(bool, TaggedStackInterpreter, false, \
3140 3153 "Insert tags in interpreter execution stack for oopmap generaion")\
3141 3154 \
3142 3155 diagnostic(bool, PauseAtStartup, false, \
3143 3156 "Causes the VM to pause at startup time and wait for the pause " \
3144 3157 "file to be removed (default: ./vm.paused.<pid>)") \
3145 3158 \
3146 3159 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3147 3160 "The file to create and for whose removal to await when pausing " \
3148 3161 "at startup. (default: ./vm.paused.<pid>)") \
3149 3162 \
3150 3163 product(bool, ExtendedDTraceProbes, false, \
3151 3164 "Enable performance-impacting dtrace probes") \
3152 3165 \
3153 3166 product(bool, DTraceMethodProbes, false, \
3154 3167 "Enable dtrace probes for method-entry and method-exit") \
3155 3168 \
3156 3169 product(bool, DTraceAllocProbes, false, \
3157 3170 "Enable dtrace probes for object allocation") \
3158 3171 \
3159 3172 product(bool, DTraceMonitorProbes, false, \
3160 3173 "Enable dtrace probes for monitor events") \
3161 3174 \
3162 3175 product(bool, RelaxAccessControlCheck, false, \
3163 3176 "Relax the access control checks in the verifier") \
3164 3177 \
3165 3178 product(bool, UseVMInterruptibleIO, true, \
3166 3179 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3167 3180 "EINTR for I/O operations results in OS_INTRPT")
3168 3181
3169 3182
3170 3183 /*
3171 3184 * Macros for factoring of globals
3172 3185 */
3173 3186
3174 3187 // Interface macros
3175 3188 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3176 3189 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3177 3190 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3178 3191 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3179 3192 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3180 3193 #ifdef PRODUCT
3181 3194 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
3182 3195 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
3183 3196 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3184 3197 #else
3185 3198 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3186 3199 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3187 3200 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3188 3201 #endif
3189 3202
3190 3203 // Implementation macros
3191 3204 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3192 3205 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3193 3206 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3194 3207 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3195 3208 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3196 3209 #ifdef PRODUCT
3197 3210 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3198 3211 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
3199 3212 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3200 3213 #else
3201 3214 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3202 3215 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3203 3216 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3204 3217 #endif
3205 3218
3206 3219 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG)
3207 3220
3208 3221 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
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