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--- old/src/share/vm/runtime/globals.hpp
+++ new/src/share/vm/runtime/globals.hpp
1 1 /*
2 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 20 * or visit www.oracle.com if you need additional information or have any
21 21 * questions.
22 22 *
23 23 */
24 24
25 25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
26 26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
27 27
28 28 #include "utilities/debug.hpp"
29 29
30 30 // use this for flags that are true per default in the tiered build
31 31 // but false in non-tiered builds, and vice versa
32 32 #ifdef TIERED
33 33 #define trueInTiered true
34 34 #define falseInTiered false
35 35 #else
36 36 #define trueInTiered false
37 37 #define falseInTiered true
38 38 #endif
39 39
40 40 #ifdef TARGET_ARCH_x86
41 41 # include "globals_x86.hpp"
42 42 #endif
43 43 #ifdef TARGET_ARCH_sparc
44 44 # include "globals_sparc.hpp"
45 45 #endif
46 46 #ifdef TARGET_ARCH_zero
47 47 # include "globals_zero.hpp"
48 48 #endif
49 49 #ifdef TARGET_ARCH_arm
50 50 # include "globals_arm.hpp"
51 51 #endif
52 52 #ifdef TARGET_ARCH_ppc
53 53 # include "globals_ppc.hpp"
54 54 #endif
55 55 #ifdef TARGET_OS_FAMILY_linux
56 56 # include "globals_linux.hpp"
57 57 #endif
58 58 #ifdef TARGET_OS_FAMILY_solaris
59 59 # include "globals_solaris.hpp"
60 60 #endif
61 61 #ifdef TARGET_OS_FAMILY_windows
62 62 # include "globals_windows.hpp"
63 63 #endif
64 64 #ifdef TARGET_OS_FAMILY_bsd
65 65 # include "globals_bsd.hpp"
66 66 #endif
67 67 #ifdef TARGET_OS_ARCH_linux_x86
68 68 # include "globals_linux_x86.hpp"
69 69 #endif
70 70 #ifdef TARGET_OS_ARCH_linux_sparc
71 71 # include "globals_linux_sparc.hpp"
72 72 #endif
73 73 #ifdef TARGET_OS_ARCH_linux_zero
74 74 # include "globals_linux_zero.hpp"
75 75 #endif
76 76 #ifdef TARGET_OS_ARCH_solaris_x86
77 77 # include "globals_solaris_x86.hpp"
78 78 #endif
79 79 #ifdef TARGET_OS_ARCH_solaris_sparc
80 80 # include "globals_solaris_sparc.hpp"
81 81 #endif
82 82 #ifdef TARGET_OS_ARCH_windows_x86
83 83 # include "globals_windows_x86.hpp"
84 84 #endif
85 85 #ifdef TARGET_OS_ARCH_linux_arm
86 86 # include "globals_linux_arm.hpp"
87 87 #endif
88 88 #ifdef TARGET_OS_ARCH_linux_ppc
89 89 # include "globals_linux_ppc.hpp"
90 90 #endif
91 91 #ifdef TARGET_OS_ARCH_bsd_x86
92 92 # include "globals_bsd_x86.hpp"
93 93 #endif
94 94 #ifdef TARGET_OS_ARCH_bsd_zero
95 95 # include "globals_bsd_zero.hpp"
96 96 #endif
97 97 #ifdef COMPILER1
98 98 #ifdef TARGET_ARCH_x86
99 99 # include "c1_globals_x86.hpp"
100 100 #endif
101 101 #ifdef TARGET_ARCH_sparc
102 102 # include "c1_globals_sparc.hpp"
103 103 #endif
104 104 #ifdef TARGET_ARCH_arm
105 105 # include "c1_globals_arm.hpp"
106 106 #endif
107 107 #ifdef TARGET_ARCH_ppc
108 108 # include "c1_globals_ppc.hpp"
109 109 #endif
110 110 #ifdef TARGET_OS_FAMILY_linux
111 111 # include "c1_globals_linux.hpp"
112 112 #endif
113 113 #ifdef TARGET_OS_FAMILY_solaris
114 114 # include "c1_globals_solaris.hpp"
115 115 #endif
116 116 #ifdef TARGET_OS_FAMILY_windows
117 117 # include "c1_globals_windows.hpp"
118 118 #endif
119 119 #ifdef TARGET_OS_FAMILY_bsd
120 120 # include "c1_globals_bsd.hpp"
121 121 #endif
122 122 #endif
123 123 #ifdef COMPILER2
124 124 #ifdef TARGET_ARCH_x86
125 125 # include "c2_globals_x86.hpp"
126 126 #endif
127 127 #ifdef TARGET_ARCH_sparc
128 128 # include "c2_globals_sparc.hpp"
129 129 #endif
130 130 #ifdef TARGET_ARCH_arm
131 131 # include "c2_globals_arm.hpp"
132 132 #endif
133 133 #ifdef TARGET_OS_FAMILY_linux
134 134 # include "c2_globals_linux.hpp"
135 135 #endif
136 136 #ifdef TARGET_OS_FAMILY_solaris
137 137 # include "c2_globals_solaris.hpp"
138 138 #endif
139 139 #ifdef TARGET_OS_FAMILY_windows
140 140 # include "c2_globals_windows.hpp"
141 141 #endif
142 142 #ifdef TARGET_OS_FAMILY_bsd
143 143 # include "c2_globals_bsd.hpp"
144 144 #endif
145 145 #endif
146 146 #ifdef SHARK
147 147 #ifdef TARGET_ARCH_zero
148 148 # include "shark_globals_zero.hpp"
149 149 #endif
150 150 #endif
151 151
152 152 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
153 153 define_pd_global(bool, BackgroundCompilation, false);
154 154 define_pd_global(bool, UseTLAB, false);
155 155 define_pd_global(bool, CICompileOSR, false);
156 156 define_pd_global(bool, UseTypeProfile, false);
157 157 define_pd_global(bool, UseOnStackReplacement, false);
158 158 define_pd_global(bool, InlineIntrinsics, false);
159 159 define_pd_global(bool, PreferInterpreterNativeStubs, true);
160 160 define_pd_global(bool, ProfileInterpreter, false);
161 161 define_pd_global(bool, ProfileTraps, false);
162 162 define_pd_global(bool, TieredCompilation, false);
163 163
164 164 define_pd_global(intx, CompileThreshold, 0);
165 165 define_pd_global(intx, BackEdgeThreshold, 0);
166 166
167 167 define_pd_global(intx, OnStackReplacePercentage, 0);
168 168 define_pd_global(bool, ResizeTLAB, false);
169 169 define_pd_global(intx, FreqInlineSize, 0);
170 170 define_pd_global(intx, InlineSmallCode, 0);
171 171 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
172 172 define_pd_global(intx, InlineClassNatives, true);
173 173 define_pd_global(intx, InlineUnsafeOps, true);
174 174 define_pd_global(intx, InitialCodeCacheSize, 160*K);
175 175 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
176 176 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
177 177 define_pd_global(intx, CodeCacheMinBlockLength, 1);
178 178 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M));
179 179 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
180 180 define_pd_global(bool, NeverActAsServerClassMachine, true);
181 181 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
182 182 #define CI_COMPILER_COUNT 0
183 183 #else
184 184
185 185 #ifdef COMPILER2
186 186 #define CI_COMPILER_COUNT 2
187 187 #else
188 188 #define CI_COMPILER_COUNT 1
189 189 #endif // COMPILER2
190 190
191 191 #endif // no compilers
192 192
193 193 // string type aliases used only in this file
194 194 typedef const char* ccstr;
195 195 typedef const char* ccstrlist; // represents string arguments which accumulate
196 196
197 197 enum FlagValueOrigin {
198 198 DEFAULT = 0,
199 199 COMMAND_LINE = 1,
200 200 ENVIRON_VAR = 2,
201 201 CONFIG_FILE = 3,
202 202 MANAGEMENT = 4,
203 203 ERGONOMIC = 5,
204 204 ATTACH_ON_DEMAND = 6,
205 205 INTERNAL = 99
206 206 };
207 207
208 208 struct Flag {
209 209 const char *type;
210 210 const char *name;
211 211 void* addr;
212 212
213 213 NOT_PRODUCT(const char *doc;)
214 214
215 215 const char *kind;
216 216 FlagValueOrigin origin;
217 217
218 218 // points to all Flags static array
219 219 static Flag *flags;
220 220
221 221 // number of flags
222 222 static size_t numFlags;
223 223
224 224 static Flag* find_flag(char* name, size_t length, bool allow_locked = false);
225 225
226 226 bool is_bool() const { return strcmp(type, "bool") == 0; }
227 227 bool get_bool() const { return *((bool*) addr); }
228 228 void set_bool(bool value) { *((bool*) addr) = value; }
229 229
230 230 bool is_intx() const { return strcmp(type, "intx") == 0; }
231 231 intx get_intx() const { return *((intx*) addr); }
232 232 void set_intx(intx value) { *((intx*) addr) = value; }
233 233
234 234 bool is_uintx() const { return strcmp(type, "uintx") == 0; }
235 235 uintx get_uintx() const { return *((uintx*) addr); }
236 236 void set_uintx(uintx value) { *((uintx*) addr) = value; }
237 237
238 238 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; }
239 239 uint64_t get_uint64_t() const { return *((uint64_t*) addr); }
240 240 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; }
241 241
242 242 bool is_double() const { return strcmp(type, "double") == 0; }
243 243 double get_double() const { return *((double*) addr); }
244 244 void set_double(double value) { *((double*) addr) = value; }
245 245
246 246 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
247 247 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
248 248 ccstr get_ccstr() const { return *((ccstr*) addr); }
249 249 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
250 250
251 251 bool is_unlocker() const;
252 252 bool is_unlocked() const;
253 253 bool is_writeable() const;
254 254 bool is_external() const;
255 255
256 256 bool is_unlocker_ext() const;
257 257 bool is_unlocked_ext() const;
258 258 bool is_writeable_ext() const;
259 259 bool is_external_ext() const;
260 260
261 261 void get_locked_message(char*, int) const;
262 262 void get_locked_message_ext(char*, int) const;
263 263
264 264 void print_on(outputStream* st, bool withComments = false );
265 265 void print_as_flag(outputStream* st);
266 266 };
267 267
268 268 // debug flags control various aspects of the VM and are global accessible
269 269
270 270 // use FlagSetting to temporarily change some debug flag
271 271 // e.g. FlagSetting fs(DebugThisAndThat, true);
272 272 // restored to previous value upon leaving scope
273 273 class FlagSetting {
274 274 bool val;
275 275 bool* flag;
276 276 public:
277 277 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
278 278 ~FlagSetting() { *flag = val; }
279 279 };
280 280
281 281
282 282 class CounterSetting {
283 283 intx* counter;
284 284 public:
285 285 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
286 286 ~CounterSetting() { (*counter)--; }
287 287 };
288 288
289 289
290 290 class IntFlagSetting {
291 291 intx val;
292 292 intx* flag;
293 293 public:
294 294 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
295 295 ~IntFlagSetting() { *flag = val; }
296 296 };
297 297
298 298
299 299 class DoubleFlagSetting {
300 300 double val;
301 301 double* flag;
302 302 public:
303 303 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
304 304 ~DoubleFlagSetting() { *flag = val; }
305 305 };
306 306
307 307
308 308 class CommandLineFlags {
309 309 public:
310 310 static bool boolAt(char* name, size_t len, bool* value);
311 311 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
312 312 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
313 313 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
314 314
315 315 static bool intxAt(char* name, size_t len, intx* value);
316 316 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
317 317 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
318 318 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
319 319
320 320 static bool uintxAt(char* name, size_t len, uintx* value);
321 321 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
322 322 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
323 323 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
324 324
325 325 static bool uint64_tAt(char* name, size_t len, uint64_t* value);
326 326 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
327 327 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin);
328 328 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
329 329
330 330 static bool doubleAt(char* name, size_t len, double* value);
331 331 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
332 332 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
333 333 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
334 334
335 335 static bool ccstrAt(char* name, size_t len, ccstr* value);
336 336 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
337 337 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
338 338 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
339 339
340 340 // Returns false if name is not a command line flag.
341 341 static bool wasSetOnCmdline(const char* name, bool* value);
342 342 static void printSetFlags(outputStream* out);
343 343
344 344 static void printFlags(outputStream* out, bool withComments);
345 345
346 346 static void verify() PRODUCT_RETURN;
347 347 };
348 348
349 349 // use this for flags that are true by default in the debug version but
350 350 // false in the optimized version, and vice versa
351 351 #ifdef ASSERT
352 352 #define trueInDebug true
353 353 #define falseInDebug false
354 354 #else
355 355 #define trueInDebug false
356 356 #define falseInDebug true
357 357 #endif
358 358
359 359 // use this for flags that are true per default in the product build
360 360 // but false in development builds, and vice versa
361 361 #ifdef PRODUCT
362 362 #define trueInProduct true
363 363 #define falseInProduct false
364 364 #else
365 365 #define trueInProduct false
366 366 #define falseInProduct true
367 367 #endif
368 368
369 369 #ifdef JAVASE_EMBEDDED
370 370 #define falseInEmbedded false
371 371 #else
372 372 #define falseInEmbedded true
373 373 #endif
374 374
375 375 // develop flags are settable / visible only during development and are constant in the PRODUCT version
376 376 // product flags are always settable / visible
377 377 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
378 378
379 379 // A flag must be declared with one of the following types:
380 380 // bool, intx, uintx, ccstr.
381 381 // The type "ccstr" is an alias for "const char*" and is used
382 382 // only in this file, because the macrology requires single-token type names.
383 383
384 384 // Note: Diagnostic options not meant for VM tuning or for product modes.
385 385 // They are to be used for VM quality assurance or field diagnosis
386 386 // of VM bugs. They are hidden so that users will not be encouraged to
387 387 // try them as if they were VM ordinary execution options. However, they
388 388 // are available in the product version of the VM. Under instruction
389 389 // from support engineers, VM customers can turn them on to collect
390 390 // diagnostic information about VM problems. To use a VM diagnostic
391 391 // option, you must first specify +UnlockDiagnosticVMOptions.
392 392 // (This master switch also affects the behavior of -Xprintflags.)
393 393 //
394 394 // experimental flags are in support of features that are not
395 395 // part of the officially supported product, but are available
396 396 // for experimenting with. They could, for example, be performance
397 397 // features that may not have undergone full or rigorous QA, but which may
398 398 // help performance in some cases and released for experimentation
399 399 // by the community of users and developers. This flag also allows one to
400 400 // be able to build a fully supported product that nonetheless also
401 401 // ships with some unsupported, lightly tested, experimental features.
402 402 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
403 403 // UnlockExperimentalVMOptions flag, which allows the control and
404 404 // modification of the experimental flags.
405 405 //
406 406 // Nota bene: neither diagnostic nor experimental options should be used casually,
407 407 // and they are not supported on production loads, except under explicit
408 408 // direction from support engineers.
409 409 //
410 410 // manageable flags are writeable external product flags.
411 411 // They are dynamically writeable through the JDK management interface
412 412 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
413 413 // These flags are external exported interface (see CCC). The list of
414 414 // manageable flags can be queried programmatically through the management
415 415 // interface.
416 416 //
417 417 // A flag can be made as "manageable" only if
418 418 // - the flag is defined in a CCC as an external exported interface.
419 419 // - the VM implementation supports dynamic setting of the flag.
420 420 // This implies that the VM must *always* query the flag variable
421 421 // and not reuse state related to the flag state at any given time.
422 422 // - you want the flag to be queried programmatically by the customers.
423 423 //
424 424 // product_rw flags are writeable internal product flags.
425 425 // They are like "manageable" flags but for internal/private use.
426 426 // The list of product_rw flags are internal/private flags which
427 427 // may be changed/removed in a future release. It can be set
428 428 // through the management interface to get/set value
429 429 // when the name of flag is supplied.
430 430 //
431 431 // A flag can be made as "product_rw" only if
432 432 // - the VM implementation supports dynamic setting of the flag.
433 433 // This implies that the VM must *always* query the flag variable
434 434 // and not reuse state related to the flag state at any given time.
435 435 //
436 436 // Note that when there is a need to support develop flags to be writeable,
437 437 // it can be done in the same way as product_rw.
438 438
439 439 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
440 440 \
441 441 lp64_product(bool, UseCompressedOops, false, \
442 442 "Use 32-bit object references in 64-bit VM. " \
443 443 "lp64_product means flag is always constant in 32 bit VM") \
444 444 \
445 445 notproduct(bool, CheckCompressedOops, true, \
446 446 "generate checks in encoding/decoding code in debug VM") \
447 447 \
448 448 product_pd(uintx, HeapBaseMinAddress, \
449 449 "OS specific low limit for heap base address") \
450 450 \
451 451 diagnostic(bool, PrintCompressedOopsMode, false, \
452 452 "Print compressed oops base address and encoding mode") \
453 453 \
454 454 lp64_product(intx, ObjectAlignmentInBytes, 8, \
455 455 "Default object alignment in bytes, 8 is minimum") \
456 456 \
457 457 /* UseMembar is theoretically a temp flag used for memory barrier \
458 458 * removal testing. It was supposed to be removed before FCS but has \
459 459 * been re-added (see 6401008) */ \
460 460 product_pd(bool, UseMembar, \
461 461 "(Unstable) Issues membars on thread state transitions") \
462 462 \
463 463 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \
464 464 * that don't support it. This will be replaced by processor detection \
465 465 * logic. \
466 466 */ \
467 467 product(bool, UsePPCLWSYNC, true, \
468 468 "Use lwsync instruction if true, else use slower sync") \
469 469 \
470 470 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
471 471 "Whether to clean the chunk pool asynchronously") \
472 472 \
473 473 /* Temporary: See 6948537 */ \
474 474 experimental(bool, UseMemSetInBOT, true, \
475 475 "(Unstable) uses memset in BOT updates in GC code") \
476 476 \
477 477 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
478 478 "Enable normal processing of flags relating to field diagnostics")\
479 479 \
480 480 experimental(bool, UnlockExperimentalVMOptions, false, \
481 481 "Enable normal processing of flags relating to experimental features")\
482 482 \
483 483 product(bool, JavaMonitorsInStackTrace, true, \
484 484 "Print info. about Java monitor locks when the stacks are dumped")\
485 485 \
486 486 product_pd(bool, UseLargePages, \
487 487 "Use large page memory") \
488 488 \
489 489 product_pd(bool, UseLargePagesIndividualAllocation, \
490 490 "Allocate large pages individually for better affinity") \
491 491 \
492 492 develop(bool, LargePagesIndividualAllocationInjectError, false, \
493 493 "Fail large pages individual allocation") \
494 494 \
495 495 develop(bool, TracePageSizes, false, \
496 496 "Trace page size selection and usage.") \
497 497 \
498 498 product(bool, UseNUMA, false, \
499 499 "Use NUMA if available") \
500 500 \
501 501 product(bool, UseNUMAInterleaving, false, \
502 502 "Interleave memory across NUMA nodes if available") \
503 503 \
504 504 product(uintx, NUMAInterleaveGranularity, 2*M, \
505 505 "Granularity to use for NUMA interleaving on Windows OS") \
506 506 \
507 507 product(bool, ForceNUMA, false, \
508 508 "Force NUMA optimizations on single-node/UMA systems") \
509 509 \
510 510 product(intx, NUMAChunkResizeWeight, 20, \
511 511 "Percentage (0-100) used to weight the current sample when " \
512 512 "computing exponentially decaying average for " \
513 513 "AdaptiveNUMAChunkSizing") \
514 514 \
515 515 product(intx, NUMASpaceResizeRate, 1*G, \
516 516 "Do not reallocate more that this amount per collection") \
517 517 \
518 518 product(bool, UseAdaptiveNUMAChunkSizing, true, \
519 519 "Enable adaptive chunk sizing for NUMA") \
520 520 \
521 521 product(bool, NUMAStats, false, \
522 522 "Print NUMA stats in detailed heap information") \
523 523 \
524 524 product(intx, NUMAPageScanRate, 256, \
525 525 "Maximum number of pages to include in the page scan procedure") \
526 526 \
527 527 product_pd(bool, NeedsDeoptSuspend, \
528 528 "True for register window machines (sparc/ia64)") \
529 529 \
530 530 product(intx, UseSSE, 99, \
531 531 "Highest supported SSE instructions set on x86/x64") \
532 532 \
533 533 product(bool, UseAES, false, \
534 534 "Control whether AES instructions can be used on x86/x64") \
535 535 \
536 536 product(uintx, LargePageSizeInBytes, 0, \
537 537 "Large page size (0 to let VM choose the page size") \
538 538 \
539 539 product(uintx, LargePageHeapSizeThreshold, 128*M, \
540 540 "Use large pages if max heap is at least this big") \
541 541 \
542 542 product(bool, ForceTimeHighResolution, false, \
543 543 "Using high time resolution(For Win32 only)") \
544 544 \
545 545 develop(bool, TraceItables, false, \
546 546 "Trace initialization and use of itables") \
547 547 \
548 548 develop(bool, TracePcPatching, false, \
549 549 "Trace usage of frame::patch_pc") \
550 550 \
551 551 develop(bool, TraceJumps, false, \
552 552 "Trace assembly jumps in thread ring buffer") \
553 553 \
554 554 develop(bool, TraceRelocator, false, \
555 555 "Trace the bytecode relocator") \
556 556 \
557 557 develop(bool, TraceLongCompiles, false, \
558 558 "Print out every time compilation is longer than " \
559 559 "a given threashold") \
560 560 \
561 561 develop(bool, SafepointALot, false, \
562 562 "Generates a lot of safepoints. Works with " \
563 563 "GuaranteedSafepointInterval") \
564 564 \
565 565 product_pd(bool, BackgroundCompilation, \
566 566 "A thread requesting compilation is not blocked during " \
567 567 "compilation") \
568 568 \
569 569 product(bool, PrintVMQWaitTime, false, \
570 570 "Prints out the waiting time in VM operation queue") \
571 571 \
572 572 develop(bool, NoYieldsInMicrolock, false, \
573 573 "Disable yields in microlock") \
574 574 \
575 575 develop(bool, TraceOopMapGeneration, false, \
576 576 "Shows oopmap generation") \
577 577 \
578 578 product(bool, MethodFlushing, true, \
579 579 "Reclamation of zombie and not-entrant methods") \
580 580 \
581 581 develop(bool, VerifyStack, false, \
582 582 "Verify stack of each thread when it is entering a runtime call") \
583 583 \
584 584 diagnostic(bool, ForceUnreachable, false, \
585 585 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \
586 586 \
587 587 notproduct(bool, StressDerivedPointers, false, \
588 588 "Force scavenge when a derived pointers is detected on stack " \
589 589 "after rtm call") \
590 590 \
591 591 develop(bool, TraceDerivedPointers, false, \
592 592 "Trace traversal of derived pointers on stack") \
593 593 \
594 594 notproduct(bool, TraceCodeBlobStacks, false, \
595 595 "Trace stack-walk of codeblobs") \
596 596 \
597 597 product(bool, PrintJNIResolving, false, \
598 598 "Used to implement -v:jni") \
599 599 \
600 600 notproduct(bool, PrintRewrites, false, \
601 601 "Print methods that are being rewritten") \
602 602 \
603 603 product(bool, UseInlineCaches, true, \
604 604 "Use Inline Caches for virtual calls ") \
605 605 \
606 606 develop(bool, InlineArrayCopy, true, \
607 607 "inline arraycopy native that is known to be part of " \
608 608 "base library DLL") \
609 609 \
610 610 develop(bool, InlineObjectHash, true, \
611 611 "inline Object::hashCode() native that is known to be part " \
612 612 "of base library DLL") \
613 613 \
614 614 develop(bool, InlineNatives, true, \
615 615 "inline natives that are known to be part of base library DLL") \
616 616 \
617 617 develop(bool, InlineMathNatives, true, \
618 618 "inline SinD, CosD, etc.") \
619 619 \
620 620 develop(bool, InlineClassNatives, true, \
621 621 "inline Class.isInstance, etc") \
622 622 \
623 623 develop(bool, InlineThreadNatives, true, \
624 624 "inline Thread.currentThread, etc") \
625 625 \
626 626 develop(bool, InlineUnsafeOps, true, \
627 627 "inline memory ops (native methods) from sun.misc.Unsafe") \
628 628 \
629 629 product(bool, CriticalJNINatives, true, \
630 630 "check for critical JNI entry points") \
631 631 \
632 632 notproduct(bool, StressCriticalJNINatives, false, \
633 633 "Exercise register saving code in critical natives") \
634 634 \
635 635 product(bool, UseSSE42Intrinsics, false, \
636 636 "SSE4.2 versions of intrinsics") \
637 637 \
638 638 product(bool, UseAESIntrinsics, false, \
639 639 "use intrinsics for AES versions of crypto") \
640 640 \
641 641 develop(bool, TraceCallFixup, false, \
642 642 "traces all call fixups") \
643 643 \
644 644 develop(bool, DeoptimizeALot, false, \
645 645 "deoptimize at every exit from the runtime system") \
646 646 \
647 647 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
648 648 "a comma separated list of bcis to deoptimize at") \
649 649 \
650 650 product(bool, DeoptimizeRandom, false, \
651 651 "deoptimize random frames on random exit from the runtime system")\
652 652 \
653 653 notproduct(bool, ZombieALot, false, \
654 654 "creates zombies (non-entrant) at exit from the runt. system") \
655 655 \
656 656 product(bool, UnlinkSymbolsALot, false, \
657 657 "unlink unreferenced symbols from the symbol table at safepoints")\
658 658 \
659 659 notproduct(bool, WalkStackALot, false, \
660 660 "trace stack (no print) at every exit from the runtime system") \
661 661 \
662 662 product(bool, Debugging, false, \
663 663 "set when executing debug methods in debug.ccp " \
664 664 "(to prevent triggering assertions)") \
665 665 \
666 666 notproduct(bool, StrictSafepointChecks, trueInDebug, \
667 667 "Enable strict checks that safepoints cannot happen for threads " \
668 668 "that used No_Safepoint_Verifier") \
669 669 \
670 670 notproduct(bool, VerifyLastFrame, false, \
671 671 "Verify oops on last frame on entry to VM") \
672 672 \
673 673 develop(bool, TraceHandleAllocation, false, \
674 674 "Prints out warnings when suspicious many handles are allocated") \
675 675 \
676 676 product(bool, UseCompilerSafepoints, true, \
677 677 "Stop at safepoints in compiled code") \
678 678 \
679 679 product(bool, UseSplitVerifier, true, \
680 680 "use split verifier with StackMapTable attributes") \
681 681 \
682 682 product(bool, FailOverToOldVerifier, true, \
683 683 "fail over to old verifier when split verifier fails") \
684 684 \
685 685 develop(bool, ShowSafepointMsgs, false, \
686 686 "Show msg. about safepoint synch.") \
687 687 \
688 688 product(bool, SafepointTimeout, false, \
689 689 "Time out and warn or fail after SafepointTimeoutDelay " \
690 690 "milliseconds if failed to reach safepoint") \
691 691 \
692 692 develop(bool, DieOnSafepointTimeout, false, \
693 693 "Die upon failure to reach safepoint (see SafepointTimeout)") \
694 694 \
695 695 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
696 696 /* typically, at most a few retries are needed */ \
697 697 product(intx, SuspendRetryCount, 50, \
698 698 "Maximum retry count for an external suspend request") \
699 699 \
700 700 product(intx, SuspendRetryDelay, 5, \
701 701 "Milliseconds to delay per retry (* current_retry_count)") \
702 702 \
703 703 product(bool, AssertOnSuspendWaitFailure, false, \
704 704 "Assert/Guarantee on external suspend wait failure") \
705 705 \
706 706 product(bool, TraceSuspendWaitFailures, false, \
707 707 "Trace external suspend wait failures") \
708 708 \
709 709 product(bool, MaxFDLimit, true, \
710 710 "Bump the number of file descriptors to max in solaris.") \
711 711 \
712 712 diagnostic(bool, LogEvents, true, \
713 713 "Enable the various ring buffer event logs") \
714 714 \
715 715 diagnostic(intx, LogEventsBufferEntries, 10, \
716 716 "Enable the various ring buffer event logs") \
717 717 \
718 718 product(bool, BytecodeVerificationRemote, true, \
719 719 "Enables the Java bytecode verifier for remote classes") \
720 720 \
721 721 product(bool, BytecodeVerificationLocal, false, \
722 722 "Enables the Java bytecode verifier for local classes") \
723 723 \
724 724 develop(bool, ForceFloatExceptions, trueInDebug, \
725 725 "Force exceptions on FP stack under/overflow") \
726 726 \
727 727 develop(bool, VerifyStackAtCalls, false, \
728 728 "Verify that the stack pointer is unchanged after calls") \
729 729 \
730 730 develop(bool, TraceJavaAssertions, false, \
731 731 "Trace java language assertions") \
732 732 \
733 733 notproduct(bool, CheckAssertionStatusDirectives, false, \
734 734 "temporary - see javaClasses.cpp") \
735 735 \
736 736 notproduct(bool, PrintMallocFree, false, \
737 737 "Trace calls to C heap malloc/free allocation") \
738 738 \
739 739 product(bool, PrintOopAddress, false, \
740 740 "Always print the location of the oop") \
741 741 \
742 742 notproduct(bool, VerifyCodeCacheOften, false, \
743 743 "Verify compiled-code cache often") \
744 744 \
745 745 develop(bool, ZapDeadCompiledLocals, false, \
746 746 "Zap dead locals in compiler frames") \
747 747 \
748 748 notproduct(bool, ZapDeadLocalsOld, false, \
749 749 "Zap dead locals (old version, zaps all frames when " \
750 750 "entering the VM") \
751 751 \
752 752 notproduct(bool, CheckOopishValues, false, \
753 753 "Warn if value contains oop ( requires ZapDeadLocals)") \
754 754 \
755 755 develop(bool, UseMallocOnly, false, \
756 756 "use only malloc/free for allocation (no resource area/arena)") \
757 757 \
758 758 develop(bool, PrintMalloc, false, \
759 759 "print all malloc/free calls") \
760 760 \
761 761 develop(bool, PrintMallocStatistics, false, \
762 762 "print malloc/free statistics") \
763 763 \
764 764 develop(bool, ZapResourceArea, trueInDebug, \
765 765 "Zap freed resource/arena space with 0xABABABAB") \
766 766 \
767 767 notproduct(bool, ZapVMHandleArea, trueInDebug, \
768 768 "Zap freed VM handle space with 0xBCBCBCBC") \
769 769 \
770 770 develop(bool, ZapJNIHandleArea, trueInDebug, \
771 771 "Zap freed JNI handle space with 0xFEFEFEFE") \
772 772 \
773 773 notproduct(bool, ZapStackSegments, trueInDebug, \
774 774 "Zap allocated/freed Stack segments with 0xFADFADED") \
775 775 \
776 776 develop(bool, ZapUnusedHeapArea, trueInDebug, \
777 777 "Zap unused heap space with 0xBAADBABE") \
778 778 \
779 779 develop(bool, TraceZapUnusedHeapArea, false, \
780 780 "Trace zapping of unused heap space") \
781 781 \
782 782 develop(bool, CheckZapUnusedHeapArea, false, \
783 783 "Check zapping of unused heap space") \
784 784 \
785 785 develop(bool, ZapFillerObjects, trueInDebug, \
786 786 "Zap filler objects with 0xDEAFBABE") \
787 787 \
788 788 develop(bool, PrintVMMessages, true, \
789 789 "Print vm messages on console") \
790 790 \
791 791 product(bool, PrintGCApplicationConcurrentTime, false, \
792 792 "Print the time the application has been running") \
793 793 \
794 794 product(bool, PrintGCApplicationStoppedTime, false, \
795 795 "Print the time the application has been stopped") \
796 796 \
797 797 diagnostic(bool, VerboseVerification, false, \
798 798 "Display detailed verification details") \
799 799 \
800 800 notproduct(uintx, ErrorHandlerTest, 0, \
801 801 "If > 0, provokes an error after VM initialization; the value" \
802 802 "determines which error to provoke. See test_error_handler()" \
803 803 "in debug.cpp.") \
804 804 \
805 805 develop(bool, Verbose, false, \
806 806 "Prints additional debugging information from other modes") \
807 807 \
808 808 develop(bool, PrintMiscellaneous, false, \
809 809 "Prints uncategorized debugging information (requires +Verbose)") \
810 810 \
811 811 develop(bool, WizardMode, false, \
812 812 "Prints much more debugging information") \
813 813 \
814 814 product(bool, ShowMessageBoxOnError, false, \
815 815 "Keep process alive on VM fatal error") \
816 816 \
817 817 product(bool, CreateMinidumpOnCrash, false, \
818 818 "Create minidump on VM fatal error") \
819 819 \
820 820 product_pd(bool, UseOSErrorReporting, \
821 821 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
822 822 \
823 823 product(bool, SuppressFatalErrorMessage, false, \
824 824 "Do NO Fatal Error report [Avoid deadlock]") \
825 825 \
826 826 product(ccstrlist, OnError, "", \
827 827 "Run user-defined commands on fatal error; see VMError.cpp " \
828 828 "for examples") \
829 829 \
830 830 product(ccstrlist, OnOutOfMemoryError, "", \
831 831 "Run user-defined commands on first java.lang.OutOfMemoryError") \
832 832 \
833 833 manageable(bool, HeapDumpBeforeFullGC, false, \
834 834 "Dump heap to file before any major stop-world GC") \
835 835 \
836 836 manageable(bool, HeapDumpAfterFullGC, false, \
837 837 "Dump heap to file after any major stop-world GC") \
838 838 \
839 839 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
840 840 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
841 841 \
842 842 manageable(ccstr, HeapDumpPath, NULL, \
843 843 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
844 844 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
845 845 "in the working directory)") \
846 846 \
847 847 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
848 848 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
849 849 "when the heap usage is larger than this") \
850 850 \
851 851 develop(uintx, HeapDumpSegmentSize, 1*G, \
852 852 "Approximate segment size when generating a segmented heap dump") \
853 853 \
854 854 develop(bool, BreakAtWarning, false, \
855 855 "Execute breakpoint upon encountering VM warning") \
856 856 \
857 857 product_pd(bool, UseVectoredExceptions, \
858 858 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
859 859 \
860 860 develop(bool, TraceVMOperation, false, \
861 861 "Trace vm operations") \
862 862 \
863 863 develop(bool, UseFakeTimers, false, \
864 864 "Tells whether the VM should use system time or a fake timer") \
865 865 \
866 866 product(ccstr, NativeMemoryTracking, "off", \
867 867 "Native memory tracking options") \
868 868 \
869 869 diagnostic(bool, PrintNMTStatistics, false, \
870 870 "Print native memory tracking summary data if it is on") \
871 871 \
872 872 diagnostic(bool, AutoShutdownNMT, true, \
873 873 "Automatically shutdown native memory tracking under stress " \
874 874 "situation. When set to false, native memory tracking tries to " \
875 875 "stay alive at the expense of JVM performance") \
876 876 \
877 877 diagnostic(bool, LogCompilation, false, \
878 878 "Log compilation activity in detail to hotspot.log or LogFile") \
879 879 \
880 880 product(bool, PrintCompilation, false, \
881 881 "Print compilations") \
882 882 \
883 883 diagnostic(bool, TraceNMethodInstalls, false, \
884 884 "Trace nmethod intallation") \
885 885 \
886 886 diagnostic(intx, ScavengeRootsInCode, 2, \
887 887 "0: do not allow scavengable oops in the code cache; " \
888 888 "1: allow scavenging from the code cache; " \
889 889 "2: emit as many constants as the compiler can see") \
890 890 \
891 891 product(bool, AlwaysRestoreFPU, false, \
892 892 "Restore the FPU control word after every JNI call (expensive)") \
893 893 \
894 894 diagnostic(bool, PrintCompilation2, false, \
895 895 "Print additional statistics per compilation") \
896 896 \
897 897 diagnostic(bool, PrintAdapterHandlers, false, \
898 898 "Print code generated for i2c/c2i adapters") \
899 899 \
900 900 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
901 901 "Verify that i2c/c2i adapters are called properly") \
902 902 \
903 903 develop(bool, VerifyAdapterSharing, false, \
904 904 "Verify that the code for shared adapters is the equivalent") \
905 905 \
906 906 diagnostic(bool, PrintAssembly, false, \
907 907 "Print assembly code (using external disassembler.so)") \
908 908 \
909 909 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
910 910 "Options string passed to disassembler.so") \
911 911 \
912 912 diagnostic(bool, PrintNMethods, false, \
913 913 "Print assembly code for nmethods when generated") \
914 914 \
915 915 diagnostic(bool, PrintNativeNMethods, false, \
916 916 "Print assembly code for native nmethods when generated") \
917 917 \
918 918 develop(bool, PrintDebugInfo, false, \
919 919 "Print debug information for all nmethods when generated") \
920 920 \
921 921 develop(bool, PrintRelocations, false, \
922 922 "Print relocation information for all nmethods when generated") \
923 923 \
924 924 develop(bool, PrintDependencies, false, \
925 925 "Print dependency information for all nmethods when generated") \
926 926 \
927 927 develop(bool, PrintExceptionHandlers, false, \
928 928 "Print exception handler tables for all nmethods when generated") \
929 929 \
930 930 develop(bool, StressCompiledExceptionHandlers, false, \
931 931 "Exercise compiled exception handlers") \
932 932 \
933 933 develop(bool, InterceptOSException, false, \
934 934 "Starts debugger when an implicit OS (e.g., NULL) " \
935 935 "exception happens") \
936 936 \
937 937 notproduct(bool, PrintCodeCache, false, \
938 938 "Print the compiled_code cache when exiting") \
939 939 \
940 940 develop(bool, PrintCodeCache2, false, \
941 941 "Print detailed info on the compiled_code cache when exiting") \
942 942 \
943 943 diagnostic(bool, PrintStubCode, false, \
944 944 "Print generated stub code") \
945 945 \
946 946 product(bool, StackTraceInThrowable, true, \
947 947 "Collect backtrace in throwable when exception happens") \
948 948 \
949 949 product(bool, OmitStackTraceInFastThrow, true, \
950 950 "Omit backtraces for some 'hot' exceptions in optimized code") \
951 951 \
952 952 product(bool, ProfilerPrintByteCodeStatistics, false, \
953 953 "Prints byte code statictics when dumping profiler output") \
954 954 \
955 955 product(bool, ProfilerRecordPC, false, \
956 956 "Collects tick for each 16 byte interval of compiled code") \
957 957 \
958 958 product(bool, ProfileVM, false, \
959 959 "Profiles ticks that fall within VM (either in the VM Thread " \
960 960 "or VM code called through stubs)") \
961 961 \
962 962 product(bool, ProfileIntervals, false, \
963 963 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
964 964 \
965 965 notproduct(bool, ProfilerCheckIntervals, false, \
966 966 "Collect and print info on spacing of profiler ticks") \
967 967 \
968 968 develop(bool, PrintJVMWarnings, false, \
969 969 "Prints warnings for unimplemented JVM functions") \
970 970 \
971 971 product(bool, PrintWarnings, true, \
972 972 "Prints JVM warnings to output stream") \
973 973 \
974 974 notproduct(uintx, WarnOnStalledSpinLock, 0, \
975 975 "Prints warnings for stalled SpinLocks") \
976 976 \
977 977 develop(bool, InitializeJavaLangSystem, true, \
978 978 "Initialize java.lang.System - turn off for individual " \
979 979 "method debugging") \
980 980 \
981 981 develop(bool, InitializeJavaLangString, true, \
982 982 "Initialize java.lang.String - turn off for individual " \
983 983 "method debugging") \
984 984 \
985 985 develop(bool, InitializeJavaLangExceptionsErrors, true, \
986 986 "Initialize various error and exception classes - turn off for " \
987 987 "individual method debugging") \
988 988 \
989 989 product(bool, RegisterFinalizersAtInit, true, \
990 990 "Register finalizable objects at end of Object.<init> or " \
991 991 "after allocation") \
992 992 \
993 993 develop(bool, RegisterReferences, true, \
994 994 "Tells whether the VM should register soft/weak/final/phantom " \
995 995 "references") \
996 996 \
997 997 develop(bool, IgnoreRewrites, false, \
998 998 "Supress rewrites of bytecodes in the oopmap generator. " \
999 999 "This is unsafe!") \
1000 1000 \
1001 1001 develop(bool, PrintCodeCacheExtension, false, \
1002 1002 "Print extension of code cache") \
1003 1003 \
1004 1004 develop(bool, UsePrivilegedStack, true, \
1005 1005 "Enable the security JVM functions") \
1006 1006 \
1007 1007 develop(bool, ProtectionDomainVerification, true, \
1008 1008 "Verifies protection domain before resolution in system " \
1009 1009 "dictionary") \
1010 1010 \
1011 1011 product(bool, ClassUnloading, true, \
1012 1012 "Do unloading of classes") \
1013 1013 \
1014 1014 develop(bool, DisableStartThread, false, \
1015 1015 "Disable starting of additional Java threads " \
1016 1016 "(for debugging only)") \
1017 1017 \
1018 1018 develop(bool, MemProfiling, false, \
1019 1019 "Write memory usage profiling to log file") \
1020 1020 \
1021 1021 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1022 1022 "Prints the system dictionary at exit") \
1023 1023 \
1024 1024 experimental(intx, PredictedLoadedClassCount, 0, \
1025 1025 "Experimental: Tune loaded class cache starting size.") \
1026 1026 \
1027 1027 diagnostic(bool, UnsyncloadClass, false, \
1028 1028 "Unstable: VM calls loadClass unsynchronized. Custom " \
1029 1029 "class loader must call VM synchronized for findClass " \
1030 1030 "and defineClass.") \
1031 1031 \
1032 1032 product(bool, AlwaysLockClassLoader, false, \
1033 1033 "Require the VM to acquire the class loader lock before calling " \
1034 1034 "loadClass() even for class loaders registering " \
1035 1035 "as parallel capable") \
1036 1036 \
1037 1037 product(bool, AllowParallelDefineClass, false, \
1038 1038 "Allow parallel defineClass requests for class loaders " \
1039 1039 "registering as parallel capable") \
1040 1040 \
1041 1041 product(bool, MustCallLoadClassInternal, false, \
1042 1042 "Call loadClassInternal() rather than loadClass()") \
1043 1043 \
1044 1044 product_pd(bool, DontYieldALot, \
1045 1045 "Throw away obvious excess yield calls (for SOLARIS only)") \
1046 1046 \
1047 1047 product_pd(bool, ConvertSleepToYield, \
1048 1048 "Converts sleep(0) to thread yield " \
1049 1049 "(may be off for SOLARIS to improve GUI)") \
1050 1050 \
1051 1051 product(bool, ConvertYieldToSleep, false, \
1052 1052 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
1053 1053 "behavior (SOLARIS only)") \
1054 1054 \
1055 1055 product(bool, UseBoundThreads, true, \
1056 1056 "Bind user level threads to kernel threads (for SOLARIS only)") \
1057 1057 \
1058 1058 develop(bool, UseDetachedThreads, true, \
1059 1059 "Use detached threads that are recycled upon termination " \
1060 1060 "(for SOLARIS only)") \
1061 1061 \
1062 1062 product(bool, UseLWPSynchronization, true, \
1063 1063 "Use LWP-based instead of libthread-based synchronization " \
1064 1064 "(SPARC only)") \
1065 1065 \
1066 1066 product(ccstr, SyncKnobs, NULL, \
1067 1067 "(Unstable) Various monitor synchronization tunables") \
1068 1068 \
1069 1069 product(intx, EmitSync, 0, \
1070 1070 "(Unsafe,Unstable) " \
1071 1071 " Controls emission of inline sync fast-path code") \
1072 1072 \
1073 1073 product(intx, MonitorBound, 0, "Bound Monitor population") \
1074 1074 \
1075 1075 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1076 1076 \
1077 1077 product(intx, Atomics, 0, \
1078 1078 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \
1079 1079 \
1080 1080 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
1081 1081 \
1082 1082 product(intx, SyncVerbose, 0, "(Unstable)" ) \
1083 1083 \
1084 1084 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
1085 1085 \
1086 1086 product(intx, hashCode, 0, \
1087 1087 "(Unstable) select hashCode generation algorithm" ) \
1088 1088 \
1089 1089 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1090 1090 "(Unstable, Linux-specific)" \
1091 1091 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
1092 1092 \
1093 1093 product(bool, FilterSpuriousWakeups, true, \
1094 1094 "Prevent spurious or premature wakeups from object.wait " \
1095 1095 "(Solaris only)") \
1096 1096 \
1097 1097 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
1098 1098 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
1099 1099 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
1100 1100 \
1101 1101 develop(bool, UsePthreads, false, \
1102 1102 "Use pthread-based instead of libthread-based synchronization " \
1103 1103 "(SPARC only)") \
1104 1104 \
1105 1105 product(bool, AdjustConcurrency, false, \
1106 1106 "call thr_setconcurrency at thread create time to avoid " \
1107 1107 "LWP starvation on MP systems (For Solaris Only)") \
1108 1108 \
1109 1109 product(bool, ReduceSignalUsage, false, \
1110 1110 "Reduce the use of OS signals in Java and/or the VM") \
1111 1111 \
1112 1112 notproduct(bool, ValidateMarkSweep, false, \
1113 1113 "Do extra validation during MarkSweep collection") \
1114 1114 \
1115 1115 notproduct(bool, RecordMarkSweepCompaction, false, \
1116 1116 "Enable GC-to-GC recording and querying of compaction during " \
1117 1117 "MarkSweep") \
1118 1118 \
1119 1119 develop_pd(bool, ShareVtableStubs, \
1120 1120 "Share vtable stubs (smaller code but worse branch prediction") \
1121 1121 \
1122 1122 develop(bool, LoadLineNumberTables, true, \
1123 1123 "Tells whether the class file parser loads line number tables") \
1124 1124 \
1125 1125 develop(bool, LoadLocalVariableTables, true, \
1126 1126 "Tells whether the class file parser loads local variable tables")\
1127 1127 \
1128 1128 develop(bool, LoadLocalVariableTypeTables, true, \
1129 1129 "Tells whether the class file parser loads local variable type tables")\
1130 1130 \
1131 1131 product(bool, AllowUserSignalHandlers, false, \
1132 1132 "Do not complain if the application installs signal handlers " \
1133 1133 "(Solaris & Linux only)") \
1134 1134 \
1135 1135 product(bool, UseSignalChaining, true, \
1136 1136 "Use signal-chaining to invoke signal handlers installed " \
1137 1137 "by the application (Solaris & Linux only)") \
1138 1138 \
1139 1139 product(bool, UseAltSigs, false, \
1140 1140 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1141 1141 "internal signals (Solaris only)") \
1142 1142 \
1143 1143 product(bool, AllowJNIEnvProxy, false, \
1144 1144 "Allow JNIEnv proxies for jdbx") \
1145 1145 \
1146 1146 product(bool, JNIDetachReleasesMonitors, true, \
1147 1147 "JNI DetachCurrentThread releases monitors owned by thread") \
1148 1148 \
1149 1149 product(bool, RestoreMXCSROnJNICalls, false, \
1150 1150 "Restore MXCSR when returning from JNI calls") \
1151 1151 \
1152 1152 product(bool, CheckJNICalls, false, \
1153 1153 "Verify all arguments to JNI calls") \
1154 1154 \
1155 1155 product(bool, UseFastJNIAccessors, true, \
1156 1156 "Use optimized versions of Get<Primitive>Field") \
1157 1157 \
1158 1158 product(bool, EagerXrunInit, false, \
1159 1159 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1160 1160 " but not all -Xrun libraries may support the state of the VM at this time") \
1161 1161 \
1162 1162 product(bool, PreserveAllAnnotations, false, \
1163 1163 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
1164 1164 \
1165 1165 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1166 1166 "Number of OutOfMemoryErrors preallocated with backtrace") \
1167 1167 \
1168 1168 product(bool, LazyBootClassLoader, true, \
1169 1169 "Enable/disable lazy opening of boot class path entries") \
1170 1170 \
1171 1171 product(bool, UseXMMForArrayCopy, false, \
1172 1172 "Use SSE2 MOVQ instruction for Arraycopy") \
1173 1173 \
1174 1174 product(intx, FieldsAllocationStyle, 1, \
1175 1175 "0 - type based with oops first, 1 - with oops last, " \
1176 1176 "2 - oops in super and sub classes are together") \
1177 1177 \
1178 1178 product(bool, CompactFields, true, \
1179 1179 "Allocate nonstatic fields in gaps between previous fields") \
1180 1180 \
1181 1181 notproduct(bool, PrintCompactFieldsSavings, false, \
1182 1182 "Print how many words were saved with CompactFields") \
1183 1183 \
1184 1184 product(bool, UseBiasedLocking, true, \
1185 1185 "Enable biased locking in JVM") \
1186 1186 \
1187 1187 product(intx, BiasedLockingStartupDelay, 4000, \
1188 1188 "Number of milliseconds to wait before enabling biased locking") \
1189 1189 \
1190 1190 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1191 1191 "Print statistics of biased locking in JVM") \
1192 1192 \
1193 1193 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1194 1194 "Threshold of number of revocations per type to try to " \
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1195 1195 "rebias all objects in the heap of that type") \
1196 1196 \
1197 1197 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1198 1198 "Threshold of number of revocations per type to permanently " \
1199 1199 "revoke biases of all objects in the heap of that type") \
1200 1200 \
1201 1201 product(intx, BiasedLockingDecayTime, 25000, \
1202 1202 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1203 1203 "type after previous bulk rebias") \
1204 1204 \
1205 - develop(bool, JavaObjectsInPerm, false, \
1205 + diagnostic(bool, JavaObjectsInPerm, false, \
1206 1206 "controls whether Classes and interned Strings are allocated" \
1207 1207 "in perm. This purely intended to allow debugging issues" \
1208 1208 "in production.") \
1209 1209 \
1210 1210 /* tracing */ \
1211 1211 \
1212 1212 notproduct(bool, TraceRuntimeCalls, false, \
1213 1213 "Trace run-time calls") \
1214 1214 \
1215 1215 develop(bool, TraceJNICalls, false, \
1216 1216 "Trace JNI calls") \
1217 1217 \
1218 1218 notproduct(bool, TraceJVMCalls, false, \
1219 1219 "Trace JVM calls") \
1220 1220 \
1221 1221 product(ccstr, TraceJVMTI, NULL, \
1222 1222 "Trace flags for JVMTI functions and events") \
1223 1223 \
1224 1224 /* This option can change an EMCP method into an obsolete method. */ \
1225 1225 /* This can affect tests that except specific methods to be EMCP. */ \
1226 1226 /* This option should be used with caution. */ \
1227 1227 product(bool, StressLdcRewrite, false, \
1228 1228 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1229 1229 \
1230 1230 product(intx, TraceRedefineClasses, 0, \
1231 1231 "Trace level for JVMTI RedefineClasses") \
1232 1232 \
1233 1233 develop(bool, StressMethodComparator, false, \
1234 1234 "run the MethodComparator on all loaded methods") \
1235 1235 \
1236 1236 /* change to false by default sometime after Mustang */ \
1237 1237 product(bool, VerifyMergedCPBytecodes, true, \
1238 1238 "Verify bytecodes after RedefineClasses constant pool merging") \
1239 1239 \
1240 1240 develop(bool, TraceJNIHandleAllocation, false, \
1241 1241 "Trace allocation/deallocation of JNI handle blocks") \
1242 1242 \
1243 1243 develop(bool, TraceThreadEvents, false, \
1244 1244 "Trace all thread events") \
1245 1245 \
1246 1246 develop(bool, TraceBytecodes, false, \
1247 1247 "Trace bytecode execution") \
1248 1248 \
1249 1249 develop(bool, TraceClassInitialization, false, \
1250 1250 "Trace class initialization") \
1251 1251 \
1252 1252 develop(bool, TraceExceptions, false, \
1253 1253 "Trace exceptions") \
1254 1254 \
1255 1255 develop(bool, TraceICs, false, \
1256 1256 "Trace inline cache changes") \
1257 1257 \
1258 1258 notproduct(bool, TraceInvocationCounterOverflow, false, \
1259 1259 "Trace method invocation counter overflow") \
1260 1260 \
1261 1261 develop(bool, TraceInlineCacheClearing, false, \
1262 1262 "Trace clearing of inline caches in nmethods") \
1263 1263 \
1264 1264 develop(bool, TraceDependencies, false, \
1265 1265 "Trace dependencies") \
1266 1266 \
1267 1267 develop(bool, VerifyDependencies, trueInDebug, \
1268 1268 "Exercise and verify the compilation dependency mechanism") \
1269 1269 \
1270 1270 develop(bool, TraceNewOopMapGeneration, false, \
1271 1271 "Trace OopMapGeneration") \
1272 1272 \
1273 1273 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1274 1274 "Trace OopMapGeneration: print detailed cell states") \
1275 1275 \
1276 1276 develop(bool, TimeOopMap, false, \
1277 1277 "Time calls to GenerateOopMap::compute_map() in sum") \
1278 1278 \
1279 1279 develop(bool, TimeOopMap2, false, \
1280 1280 "Time calls to GenerateOopMap::compute_map() individually") \
1281 1281 \
1282 1282 develop(bool, TraceMonitorMismatch, false, \
1283 1283 "Trace monitor matching failures during OopMapGeneration") \
1284 1284 \
1285 1285 develop(bool, TraceOopMapRewrites, false, \
1286 1286 "Trace rewritting of method oops during oop map generation") \
1287 1287 \
1288 1288 develop(bool, TraceSafepoint, false, \
1289 1289 "Trace safepoint operations") \
1290 1290 \
1291 1291 develop(bool, TraceICBuffer, false, \
1292 1292 "Trace usage of IC buffer") \
1293 1293 \
1294 1294 develop(bool, TraceCompiledIC, false, \
1295 1295 "Trace changes of compiled IC") \
1296 1296 \
1297 1297 notproduct(bool, TraceZapDeadLocals, false, \
1298 1298 "Trace zapping dead locals") \
1299 1299 \
1300 1300 develop(bool, TraceStartupTime, false, \
1301 1301 "Trace setup time") \
1302 1302 \
1303 1303 develop(bool, TraceProtectionDomainVerification, false, \
1304 1304 "Trace protection domain verifcation") \
1305 1305 \
1306 1306 develop(bool, TraceClearedExceptions, false, \
1307 1307 "Prints when an exception is forcibly cleared") \
1308 1308 \
1309 1309 product(bool, TraceClassResolution, false, \
1310 1310 "Trace all constant pool resolutions (for debugging)") \
1311 1311 \
1312 1312 product(bool, TraceBiasedLocking, false, \
1313 1313 "Trace biased locking in JVM") \
1314 1314 \
1315 1315 product(bool, TraceMonitorInflation, false, \
1316 1316 "Trace monitor inflation in JVM") \
1317 1317 \
1318 1318 /* gc */ \
1319 1319 \
1320 1320 product(bool, UseSerialGC, false, \
1321 1321 "Use the serial garbage collector") \
1322 1322 \
1323 1323 product(bool, UseG1GC, false, \
1324 1324 "Use the Garbage-First garbage collector") \
1325 1325 \
1326 1326 product(bool, UseParallelGC, false, \
1327 1327 "Use the Parallel Scavenge garbage collector") \
1328 1328 \
1329 1329 product(bool, UseParallelOldGC, false, \
1330 1330 "Use the Parallel Old garbage collector") \
1331 1331 \
1332 1332 product(uintx, HeapMaximumCompactionInterval, 20, \
1333 1333 "How often should we maximally compact the heap (not allowing " \
1334 1334 "any dead space)") \
1335 1335 \
1336 1336 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1337 1337 "The collection count for the first maximum compaction") \
1338 1338 \
1339 1339 product(bool, UseMaximumCompactionOnSystemGC, true, \
1340 1340 "In the Parallel Old garbage collector maximum compaction for " \
1341 1341 "a system GC") \
1342 1342 \
1343 1343 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1344 1344 "The mean used by the par compact dead wood" \
1345 1345 "limiter (a number between 0-100).") \
1346 1346 \
1347 1347 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1348 1348 "The standard deviation used by the par compact dead wood" \
1349 1349 "limiter (a number between 0-100).") \
1350 1350 \
1351 1351 product(uintx, ParallelGCThreads, 0, \
1352 1352 "Number of parallel threads parallel gc will use") \
1353 1353 \
1354 1354 product(bool, UseDynamicNumberOfGCThreads, false, \
1355 1355 "Dynamically choose the number of parallel threads " \
1356 1356 "parallel gc will use") \
1357 1357 \
1358 1358 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1359 1359 "Force dynamic selection of the number of" \
1360 1360 "parallel threads parallel gc will use to aid debugging") \
1361 1361 \
1362 1362 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1363 1363 "Size of heap (bytes) per GC thread used in calculating the " \
1364 1364 "number of GC threads") \
1365 1365 \
1366 1366 product(bool, TraceDynamicGCThreads, false, \
1367 1367 "Trace the dynamic GC thread usage") \
1368 1368 \
1369 1369 develop(bool, ParallelOldGCSplitALot, false, \
1370 1370 "Provoke splitting (copying data from a young gen space to" \
1371 1371 "multiple destination spaces)") \
1372 1372 \
1373 1373 develop(uintx, ParallelOldGCSplitInterval, 3, \
1374 1374 "How often to provoke splitting a young gen space") \
1375 1375 \
1376 1376 product(uintx, ConcGCThreads, 0, \
1377 1377 "Number of threads concurrent gc will use") \
1378 1378 \
1379 1379 product(uintx, YoungPLABSize, 4096, \
1380 1380 "Size of young gen promotion labs (in HeapWords)") \
1381 1381 \
1382 1382 product(uintx, OldPLABSize, 1024, \
1383 1383 "Size of old gen promotion labs (in HeapWords)") \
1384 1384 \
1385 1385 product(uintx, GCTaskTimeStampEntries, 200, \
1386 1386 "Number of time stamp entries per gc worker thread") \
1387 1387 \
1388 1388 product(bool, AlwaysTenure, false, \
1389 1389 "Always tenure objects in eden. (ParallelGC only)") \
1390 1390 \
1391 1391 product(bool, NeverTenure, false, \
1392 1392 "Never tenure objects in eden, May tenure on overflow " \
1393 1393 "(ParallelGC only)") \
1394 1394 \
1395 1395 product(bool, ScavengeBeforeFullGC, true, \
1396 1396 "Scavenge youngest generation before each full GC, " \
1397 1397 "used with UseParallelGC") \
1398 1398 \
1399 1399 develop(bool, ScavengeWithObjectsInToSpace, false, \
1400 1400 "Allow scavenges to occur when to_space contains objects.") \
1401 1401 \
1402 1402 product(bool, UseConcMarkSweepGC, false, \
1403 1403 "Use Concurrent Mark-Sweep GC in the old generation") \
1404 1404 \
1405 1405 product(bool, ExplicitGCInvokesConcurrent, false, \
1406 1406 "A System.gc() request invokes a concurrent collection;" \
1407 1407 " (effective only when UseConcMarkSweepGC)") \
1408 1408 \
1409 1409 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1410 1410 "A System.gc() request invokes a concurrent collection and " \
1411 1411 "also unloads classes during such a concurrent gc cycle " \
1412 1412 "(effective only when UseConcMarkSweepGC)") \
1413 1413 \
1414 1414 product(bool, GCLockerInvokesConcurrent, false, \
1415 1415 "The exit of a JNI CS necessitating a scavenge also" \
1416 1416 " kicks off a bkgrd concurrent collection") \
1417 1417 \
1418 1418 product(uintx, GCLockerEdenExpansionPercent, 5, \
1419 1419 "How much the GC can expand the eden by while the GC locker " \
1420 1420 "is active (as a percentage)") \
1421 1421 \
1422 1422 develop(bool, UseCMSAdaptiveFreeLists, true, \
1423 1423 "Use Adaptive Free Lists in the CMS generation") \
1424 1424 \
1425 1425 develop(bool, UseAsyncConcMarkSweepGC, true, \
1426 1426 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1427 1427 \
1428 1428 develop(bool, RotateCMSCollectionTypes, false, \
1429 1429 "Rotate the CMS collections among concurrent and STW") \
1430 1430 \
1431 1431 product(bool, UseCMSBestFit, true, \
1432 1432 "Use CMS best fit allocation strategy") \
1433 1433 \
1434 1434 product(bool, UseCMSCollectionPassing, true, \
1435 1435 "Use passing of collection from background to foreground") \
1436 1436 \
1437 1437 product(bool, UseParNewGC, false, \
1438 1438 "Use parallel threads in the new generation.") \
1439 1439 \
1440 1440 product(bool, ParallelGCVerbose, false, \
1441 1441 "Verbose output for parallel GC.") \
1442 1442 \
1443 1443 product(intx, ParallelGCBufferWastePct, 10, \
1444 1444 "wasted fraction of parallel allocation buffer.") \
1445 1445 \
1446 1446 diagnostic(bool, ParallelGCRetainPLAB, false, \
1447 1447 "Retain parallel allocation buffers across scavenges; " \
1448 1448 " -- disabled because this currently conflicts with " \
1449 1449 " parallel card scanning under certain conditions ") \
1450 1450 \
1451 1451 product(intx, TargetPLABWastePct, 10, \
1452 1452 "target wasted space in last buffer as pct of overall allocation")\
1453 1453 \
1454 1454 product(uintx, PLABWeight, 75, \
1455 1455 "Percentage (0-100) used to weight the current sample when" \
1456 1456 "computing exponentially decaying average for ResizePLAB.") \
1457 1457 \
1458 1458 product(bool, ResizePLAB, true, \
1459 1459 "Dynamically resize (survivor space) promotion labs") \
1460 1460 \
1461 1461 product(bool, PrintPLAB, false, \
1462 1462 "Print (survivor space) promotion labs sizing decisions") \
1463 1463 \
1464 1464 product(intx, ParGCArrayScanChunk, 50, \
1465 1465 "Scan a subset and push remainder, if array is bigger than this") \
1466 1466 \
1467 1467 product(bool, ParGCUseLocalOverflow, false, \
1468 1468 "Instead of a global overflow list, use local overflow stacks") \
1469 1469 \
1470 1470 product(bool, ParGCTrimOverflow, true, \
1471 1471 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \
1472 1472 \
1473 1473 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1474 1474 "Whether we should simulate work queue overflow in ParNew") \
1475 1475 \
1476 1476 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1477 1477 "An `interval' counter that determines how frequently " \
1478 1478 "we simulate overflow; a smaller number increases frequency") \
1479 1479 \
1480 1480 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1481 1481 "The desired number of objects to claim from the overflow list") \
1482 1482 \
1483 1483 diagnostic(uintx, ParGCStridesPerThread, 2, \
1484 1484 "The number of strides per worker thread that we divide up the " \
1485 1485 "card table scanning work into") \
1486 1486 \
1487 1487 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1488 1488 "The number of cards in each chunk of the parallel chunks used " \
1489 1489 "during card table scanning") \
1490 1490 \
1491 1491 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1492 1492 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1493 1493 "parallel GC.") \
1494 1494 \
1495 1495 product(uintx, OldPLABWeight, 50, \
1496 1496 "Percentage (0-100) used to weight the current sample when" \
1497 1497 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \
1498 1498 \
1499 1499 product(bool, ResizeOldPLAB, true, \
1500 1500 "Dynamically resize (old gen) promotion labs") \
1501 1501 \
1502 1502 product(bool, PrintOldPLAB, false, \
1503 1503 "Print (old gen) promotion labs sizing decisions") \
1504 1504 \
1505 1505 product(uintx, CMSOldPLABMin, 16, \
1506 1506 "Min size of CMS gen promotion lab caches per worker per blksize")\
1507 1507 \
1508 1508 product(uintx, CMSOldPLABMax, 1024, \
1509 1509 "Max size of CMS gen promotion lab caches per worker per blksize")\
1510 1510 \
1511 1511 product(uintx, CMSOldPLABNumRefills, 4, \
1512 1512 "Nominal number of refills of CMS gen promotion lab cache" \
1513 1513 " per worker per block size") \
1514 1514 \
1515 1515 product(bool, CMSOldPLABResizeQuicker, false, \
1516 1516 "Whether to react on-the-fly during a scavenge to a sudden" \
1517 1517 " change in block demand rate") \
1518 1518 \
1519 1519 product(uintx, CMSOldPLABToleranceFactor, 4, \
1520 1520 "The tolerance of the phase-change detector for on-the-fly" \
1521 1521 " PLAB resizing during a scavenge") \
1522 1522 \
1523 1523 product(uintx, CMSOldPLABReactivityFactor, 2, \
1524 1524 "The gain in the feedback loop for on-the-fly PLAB resizing" \
1525 1525 " during a scavenge") \
1526 1526 \
1527 1527 product(bool, AlwaysPreTouch, false, \
1528 1528 "It forces all freshly committed pages to be pre-touched.") \
1529 1529 \
1530 1530 product_pd(intx, CMSYoungGenPerWorker, \
1531 1531 "The maximum size of young gen chosen by default per GC worker " \
1532 1532 "thread available") \
1533 1533 \
1534 1534 product(bool, CMSIncrementalMode, false, \
1535 1535 "Whether CMS GC should operate in \"incremental\" mode") \
1536 1536 \
1537 1537 product(uintx, CMSIncrementalDutyCycle, 10, \
1538 1538 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1539 1539 "CMSIncrementalPacing is enabled, then this is just the initial" \
1540 1540 "value") \
1541 1541 \
1542 1542 product(bool, CMSIncrementalPacing, true, \
1543 1543 "Whether the CMS incremental mode duty cycle should be " \
1544 1544 "automatically adjusted") \
1545 1545 \
1546 1546 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1547 1547 "Lower bound on the duty cycle when CMSIncrementalPacing is " \
1548 1548 "enabled (a percentage, 0-100)") \
1549 1549 \
1550 1550 product(uintx, CMSIncrementalSafetyFactor, 10, \
1551 1551 "Percentage (0-100) used to add conservatism when computing the " \
1552 1552 "duty cycle") \
1553 1553 \
1554 1554 product(uintx, CMSIncrementalOffset, 0, \
1555 1555 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1556 1556 " is shifted to the right within the period between young GCs") \
1557 1557 \
1558 1558 product(uintx, CMSExpAvgFactor, 50, \
1559 1559 "Percentage (0-100) used to weight the current sample when" \
1560 1560 "computing exponential averages for CMS statistics.") \
1561 1561 \
1562 1562 product(uintx, CMS_FLSWeight, 75, \
1563 1563 "Percentage (0-100) used to weight the current sample when" \
1564 1564 "computing exponentially decating averages for CMS FLS statistics.") \
1565 1565 \
1566 1566 product(uintx, CMS_FLSPadding, 1, \
1567 1567 "The multiple of deviation from mean to use for buffering" \
1568 1568 "against volatility in free list demand.") \
1569 1569 \
1570 1570 product(uintx, FLSCoalescePolicy, 2, \
1571 1571 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1572 1572 \
1573 1573 product(bool, FLSAlwaysCoalesceLarge, false, \
1574 1574 "CMS: Larger free blocks are always available for coalescing") \
1575 1575 \
1576 1576 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1577 1577 "CMS: the smaller the percentage the greater the coalition force")\
1578 1578 \
1579 1579 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1580 1580 "CMS: the factor by which to inflate estimated demand of small" \
1581 1581 " block sizes to prevent coalescing with an adjoining block") \
1582 1582 \
1583 1583 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1584 1584 "CMS: the factor by which to inflate estimated demand of large" \
1585 1585 " block sizes to prevent coalescing with an adjoining block") \
1586 1586 \
1587 1587 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1588 1588 "CMS: the factor by which to inflate estimated demand of small" \
1589 1589 " block sizes to prevent splitting to supply demand for smaller" \
1590 1590 " blocks") \
1591 1591 \
1592 1592 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1593 1593 "CMS: the factor by which to inflate estimated demand of large" \
1594 1594 " block sizes to prevent splitting to supply demand for smaller" \
1595 1595 " blocks") \
1596 1596 \
1597 1597 product(bool, CMSExtrapolateSweep, false, \
1598 1598 "CMS: cushion for block demand during sweep") \
1599 1599 \
1600 1600 product(uintx, CMS_SweepWeight, 75, \
1601 1601 "Percentage (0-100) used to weight the current sample when " \
1602 1602 "computing exponentially decaying average for inter-sweep " \
1603 1603 "duration") \
1604 1604 \
1605 1605 product(uintx, CMS_SweepPadding, 1, \
1606 1606 "The multiple of deviation from mean to use for buffering " \
1607 1607 "against volatility in inter-sweep duration.") \
1608 1608 \
1609 1609 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1610 1610 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1611 1611 "duration exceeds this threhold in milliseconds") \
1612 1612 \
1613 1613 develop(bool, CMSTraceIncrementalMode, false, \
1614 1614 "Trace CMS incremental mode") \
1615 1615 \
1616 1616 develop(bool, CMSTraceIncrementalPacing, false, \
1617 1617 "Trace CMS incremental mode pacing computation") \
1618 1618 \
1619 1619 develop(bool, CMSTraceThreadState, false, \
1620 1620 "Trace the CMS thread state (enable the trace_state() method)") \
1621 1621 \
1622 1622 product(bool, CMSClassUnloadingEnabled, false, \
1623 1623 "Whether class unloading enabled when using CMS GC") \
1624 1624 \
1625 1625 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1626 1626 "When CMS class unloading is enabled, the maximum CMS cycle count"\
1627 1627 " for which classes may not be unloaded") \
1628 1628 \
1629 1629 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1630 1630 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1631 1631 \
1632 1632 product(bool, UseCMSCompactAtFullCollection, true, \
1633 1633 "Use mark sweep compact at full collections") \
1634 1634 \
1635 1635 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1636 1636 "Number of CMS full collection done before compaction if > 0") \
1637 1637 \
1638 1638 develop(intx, CMSDictionaryChoice, 0, \
1639 1639 "Use BinaryTreeDictionary as default in the CMS generation") \
1640 1640 \
1641 1641 product(uintx, CMSIndexedFreeListReplenish, 4, \
1642 1642 "Replenish an indexed free list with this number of chunks") \
1643 1643 \
1644 1644 product(bool, CMSReplenishIntermediate, true, \
1645 1645 "Replenish all intermediate free-list caches") \
1646 1646 \
1647 1647 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1648 1648 "When satisfying batched demand, split blocks from the " \
1649 1649 "IndexedFreeList whose size is a multiple of requested size") \
1650 1650 \
1651 1651 product(bool, CMSLoopWarn, false, \
1652 1652 "Warn in case of excessive CMS looping") \
1653 1653 \
1654 1654 develop(bool, CMSOverflowEarlyRestoration, false, \
1655 1655 "Whether preserved marks should be restored early") \
1656 1656 \
1657 1657 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1658 1658 "Size of marking stack") \
1659 1659 \
1660 1660 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1661 1661 "Max size of marking stack") \
1662 1662 \
1663 1663 notproduct(bool, CMSMarkStackOverflowALot, false, \
1664 1664 "Whether we should simulate frequent marking stack / work queue" \
1665 1665 " overflow") \
1666 1666 \
1667 1667 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1668 1668 "An `interval' counter that determines how frequently" \
1669 1669 " we simulate overflow; a smaller number increases frequency") \
1670 1670 \
1671 1671 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1672 1672 "(Temporary, subject to experimentation)" \
1673 1673 "Maximum number of abortable preclean iterations, if > 0") \
1674 1674 \
1675 1675 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1676 1676 "(Temporary, subject to experimentation)" \
1677 1677 "Maximum time in abortable preclean in ms") \
1678 1678 \
1679 1679 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1680 1680 "(Temporary, subject to experimentation)" \
1681 1681 "Nominal minimum work per abortable preclean iteration") \
1682 1682 \
1683 1683 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1684 1684 "(Temporary, subject to experimentation)" \
1685 1685 " Time that we sleep between iterations when not given" \
1686 1686 " enough work per iteration") \
1687 1687 \
1688 1688 product(uintx, CMSRescanMultiple, 32, \
1689 1689 "Size (in cards) of CMS parallel rescan task") \
1690 1690 \
1691 1691 product(uintx, CMSConcMarkMultiple, 32, \
1692 1692 "Size (in cards) of CMS concurrent MT marking task") \
1693 1693 \
1694 1694 product(uintx, CMSRevisitStackSize, 1*M, \
1695 1695 "Size of CMS KlassKlass revisit stack") \
1696 1696 \
1697 1697 product(bool, CMSAbortSemantics, false, \
1698 1698 "Whether abort-on-overflow semantics is implemented") \
1699 1699 \
1700 1700 product(bool, CMSParallelInitialMarkEnabled, false, \
1701 1701 "Use the parallel initial mark.") \
1702 1702 \
1703 1703 product(bool, CMSParallelRemarkEnabled, true, \
1704 1704 "Whether parallel remark enabled (only if ParNewGC)") \
1705 1705 \
1706 1706 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1707 1707 "Whether parallel remark of survivor space" \
1708 1708 " enabled (effective only if CMSParallelRemarkEnabled)") \
1709 1709 \
1710 1710 product(bool, CMSPLABRecordAlways, true, \
1711 1711 "Whether to always record survivor space PLAB bdries" \
1712 1712 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1713 1713 \
1714 1714 product(bool, CMSEdenChunksRecordAlways, false, \
1715 1715 "Whether to always record eden chunks used for " \
1716 1716 "the parallel initial mark or remark of eden" ) \
1717 1717 \
1718 1718 product(bool, CMSPrintEdenSurvivorChunks, false, \
1719 1719 "Print the eden and the survivor chunks used for the parallel " \
1720 1720 "initial mark or remark of the eden/survivor spaces") \
1721 1721 \
1722 1722 product(bool, CMSConcurrentMTEnabled, true, \
1723 1723 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1724 1724 \
1725 1725 product(bool, CMSPermGenPrecleaningEnabled, true, \
1726 1726 "Whether concurrent precleaning enabled in perm gen" \
1727 1727 " (effective only when CMSPrecleaningEnabled is true)") \
1728 1728 \
1729 1729 product(bool, CMSPrecleaningEnabled, true, \
1730 1730 "Whether concurrent precleaning enabled") \
1731 1731 \
1732 1732 product(uintx, CMSPrecleanIter, 3, \
1733 1733 "Maximum number of precleaning iteration passes") \
1734 1734 \
1735 1735 product(uintx, CMSPrecleanNumerator, 2, \
1736 1736 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1737 1737 " ratio") \
1738 1738 \
1739 1739 product(uintx, CMSPrecleanDenominator, 3, \
1740 1740 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1741 1741 " ratio") \
1742 1742 \
1743 1743 product(bool, CMSPrecleanRefLists1, true, \
1744 1744 "Preclean ref lists during (initial) preclean phase") \
1745 1745 \
1746 1746 product(bool, CMSPrecleanRefLists2, false, \
1747 1747 "Preclean ref lists during abortable preclean phase") \
1748 1748 \
1749 1749 product(bool, CMSPrecleanSurvivors1, false, \
1750 1750 "Preclean survivors during (initial) preclean phase") \
1751 1751 \
1752 1752 product(bool, CMSPrecleanSurvivors2, true, \
1753 1753 "Preclean survivors during abortable preclean phase") \
1754 1754 \
1755 1755 product(uintx, CMSPrecleanThreshold, 1000, \
1756 1756 "Don't re-iterate if #dirty cards less than this") \
1757 1757 \
1758 1758 product(bool, CMSCleanOnEnter, true, \
1759 1759 "Clean-on-enter optimization for reducing number of dirty cards") \
1760 1760 \
1761 1761 product(uintx, CMSRemarkVerifyVariant, 1, \
1762 1762 "Choose variant (1,2) of verification following remark") \
1763 1763 \
1764 1764 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1765 1765 "If Eden used is below this value, don't try to schedule remark") \
1766 1766 \
1767 1767 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1768 1768 "The Eden occupancy % at which to try and schedule remark pause") \
1769 1769 \
1770 1770 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1771 1771 "Start sampling Eden top at least before yg occupancy reaches" \
1772 1772 " 1/<ratio> of the size at which we plan to schedule remark") \
1773 1773 \
1774 1774 product(uintx, CMSSamplingGrain, 16*K, \
1775 1775 "The minimum distance between eden samples for CMS (see above)") \
1776 1776 \
1777 1777 product(bool, CMSScavengeBeforeRemark, false, \
1778 1778 "Attempt scavenge before the CMS remark step") \
1779 1779 \
1780 1780 develop(bool, CMSTraceSweeper, false, \
1781 1781 "Trace some actions of the CMS sweeper") \
1782 1782 \
1783 1783 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1784 1784 "Don't drain below this size per parallel worker/thief") \
1785 1785 \
1786 1786 manageable(intx, CMSWaitDuration, 2000, \
1787 1787 "Time in milliseconds that CMS thread waits for young GC") \
1788 1788 \
1789 1789 product(bool, CMSYield, true, \
1790 1790 "Yield between steps of concurrent mark & sweep") \
1791 1791 \
1792 1792 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1793 1793 "Bitmap operations should process at most this many bits" \
1794 1794 "between yields") \
1795 1795 \
1796 1796 product(bool, CMSDumpAtPromotionFailure, false, \
1797 1797 "Dump useful information about the state of the CMS old " \
1798 1798 " generation upon a promotion failure.") \
1799 1799 \
1800 1800 product(bool, CMSPrintChunksInDump, false, \
1801 1801 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1802 1802 " more detailed information about the free chunks.") \
1803 1803 \
1804 1804 product(bool, CMSPrintObjectsInDump, false, \
1805 1805 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1806 1806 " more detailed information about the allocated objects.") \
1807 1807 \
1808 1808 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1809 1809 "Verify that all refs across the FLS boundary " \
1810 1810 " are to valid objects") \
1811 1811 \
1812 1812 diagnostic(bool, FLSVerifyLists, false, \
1813 1813 "Do lots of (expensive) FreeListSpace verification") \
1814 1814 \
1815 1815 diagnostic(bool, FLSVerifyIndexTable, false, \
1816 1816 "Do lots of (expensive) FLS index table verification") \
1817 1817 \
1818 1818 develop(bool, FLSVerifyDictionary, false, \
1819 1819 "Do lots of (expensive) FLS dictionary verification") \
1820 1820 \
1821 1821 develop(bool, VerifyBlockOffsetArray, false, \
1822 1822 "Do (expensive!) block offset array verification") \
1823 1823 \
1824 1824 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1825 1825 "Maintain _unallocated_block in BlockOffsetArray" \
1826 1826 " (currently applicable only to CMS collector)") \
1827 1827 \
1828 1828 develop(bool, TraceCMSState, false, \
1829 1829 "Trace the state of the CMS collection") \
1830 1830 \
1831 1831 product(intx, RefDiscoveryPolicy, 0, \
1832 1832 "Whether reference-based(0) or referent-based(1)") \
1833 1833 \
1834 1834 product(bool, ParallelRefProcEnabled, false, \
1835 1835 "Enable parallel reference processing whenever possible") \
1836 1836 \
1837 1837 product(bool, ParallelRefProcBalancingEnabled, true, \
1838 1838 "Enable balancing of reference processing queues") \
1839 1839 \
1840 1840 product(intx, CMSTriggerRatio, 80, \
1841 1841 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1842 1842 "allocated before a CMS collection cycle commences") \
1843 1843 \
1844 1844 product(intx, CMSTriggerPermRatio, 80, \
1845 1845 "Percentage of MinHeapFreeRatio in the CMS perm generation that " \
1846 1846 "is allocated before a CMS collection cycle commences, that " \
1847 1847 "also collects the perm generation") \
1848 1848 \
1849 1849 product(uintx, CMSBootstrapOccupancy, 50, \
1850 1850 "Percentage CMS generation occupancy at which to " \
1851 1851 "initiate CMS collection for bootstrapping collection stats") \
1852 1852 \
1853 1853 product(intx, CMSInitiatingOccupancyFraction, -1, \
1854 1854 "Percentage CMS generation occupancy to start a CMS collection " \
1855 1855 "cycle. A negative value means that CMSTriggerRatio is used") \
1856 1856 \
1857 1857 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1858 1858 "Percentage of the (entire) heap occupancy to start a " \
1859 1859 "concurrent GC cycle. It us used by GCs that trigger a " \
1860 1860 "concurrent GC cycle based on the occupancy of the entire heap, " \
1861 1861 "not just one of the generations (e.g., G1). A value of 0 " \
1862 1862 "denotes 'do constant GC cycles'.") \
1863 1863 \
1864 1864 product(intx, CMSInitiatingPermOccupancyFraction, -1, \
1865 1865 "Percentage CMS perm generation occupancy to start a " \
1866 1866 "CMScollection cycle. A negative value means that " \
1867 1867 "CMSTriggerPermRatio is used") \
1868 1868 \
1869 1869 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1870 1870 "Only use occupancy as a crierion for starting a CMS collection") \
1871 1871 \
1872 1872 product(intx, CMSIsTooFullPercentage, 98, \
1873 1873 "An absolute ceiling above which CMS will always consider the " \
1874 1874 "perm gen ripe for collection") \
1875 1875 \
1876 1876 develop(bool, CMSTestInFreeList, false, \
1877 1877 "Check if the coalesced range is already in the " \
1878 1878 "free lists as claimed") \
1879 1879 \
1880 1880 notproduct(bool, CMSVerifyReturnedBytes, false, \
1881 1881 "Check that all the garbage collected was returned to the " \
1882 1882 "free lists.") \
1883 1883 \
1884 1884 notproduct(bool, ScavengeALot, false, \
1885 1885 "Force scavenge at every Nth exit from the runtime system " \
1886 1886 "(N=ScavengeALotInterval)") \
1887 1887 \
1888 1888 develop(bool, FullGCALot, false, \
1889 1889 "Force full gc at every Nth exit from the runtime system " \
1890 1890 "(N=FullGCALotInterval)") \
1891 1891 \
1892 1892 notproduct(bool, GCALotAtAllSafepoints, false, \
1893 1893 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1894 1894 \
1895 1895 product(bool, PrintPromotionFailure, false, \
1896 1896 "Print additional diagnostic information following " \
1897 1897 " promotion failure") \
1898 1898 \
1899 1899 notproduct(bool, PromotionFailureALot, false, \
1900 1900 "Use promotion failure handling on every youngest generation " \
1901 1901 "collection") \
1902 1902 \
1903 1903 develop(uintx, PromotionFailureALotCount, 1000, \
1904 1904 "Number of promotion failures occurring at ParGCAllocBuffer" \
1905 1905 "refill attempts (ParNew) or promotion attempts " \
1906 1906 "(other young collectors) ") \
1907 1907 \
1908 1908 develop(uintx, PromotionFailureALotInterval, 5, \
1909 1909 "Total collections between promotion failures alot") \
1910 1910 \
1911 1911 experimental(intx, WorkStealingSleepMillis, 1, \
1912 1912 "Sleep time when sleep is used for yields") \
1913 1913 \
1914 1914 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
1915 1915 "Number of yields before a sleep is done during workstealing") \
1916 1916 \
1917 1917 experimental(uintx, WorkStealingHardSpins, 4096, \
1918 1918 "Number of iterations in a spin loop between checks on " \
1919 1919 "time out of hard spin") \
1920 1920 \
1921 1921 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
1922 1922 "Ratio of hard spins to calls to yield") \
1923 1923 \
1924 1924 develop(uintx, ObjArrayMarkingStride, 512, \
1925 1925 "Number of ObjArray elements to push onto the marking stack" \
1926 1926 "before pushing a continuation entry") \
1927 1927 \
1928 1928 notproduct(bool, ExecuteInternalVMTests, false, \
1929 1929 "Enable execution of internal VM tests.") \
1930 1930 \
1931 1931 notproduct(bool, VerboseInternalVMTests, false, \
1932 1932 "Turn on logging for internal VM tests.") \
1933 1933 \
1934 1934 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
1935 1935 \
1936 1936 product_pd(bool, ResizeTLAB, \
1937 1937 "Dynamically resize tlab size for threads") \
1938 1938 \
1939 1939 product(bool, ZeroTLAB, false, \
1940 1940 "Zero out the newly created TLAB") \
1941 1941 \
1942 1942 product(bool, FastTLABRefill, true, \
1943 1943 "Use fast TLAB refill code") \
1944 1944 \
1945 1945 product(bool, PrintTLAB, false, \
1946 1946 "Print various TLAB related information") \
1947 1947 \
1948 1948 product(bool, TLABStats, true, \
1949 1949 "Print various TLAB related information") \
1950 1950 \
1951 1951 product(bool, PrintRevisitStats, false, \
1952 1952 "Print revisit (klass and MDO) stack related information") \
1953 1953 \
1954 1954 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \
1955 1955 "Enable LowMemoryProtection")) \
1956 1956 \
1957 1957 product_pd(bool, NeverActAsServerClassMachine, \
1958 1958 "Never act like a server-class machine") \
1959 1959 \
1960 1960 product(bool, AlwaysActAsServerClassMachine, false, \
1961 1961 "Always act like a server-class machine") \
1962 1962 \
1963 1963 product_pd(uint64_t, MaxRAM, \
1964 1964 "Real memory size (in bytes) used to set maximum heap size") \
1965 1965 \
1966 1966 product(uintx, ErgoHeapSizeLimit, 0, \
1967 1967 "Maximum ergonomically set heap size (in bytes); zero means use " \
1968 1968 "MaxRAM / MaxRAMFraction") \
1969 1969 \
1970 1970 product(uintx, MaxRAMFraction, 4, \
1971 1971 "Maximum fraction (1/n) of real memory used for maximum heap " \
1972 1972 "size") \
1973 1973 \
1974 1974 product(uintx, DefaultMaxRAMFraction, 4, \
1975 1975 "Maximum fraction (1/n) of real memory used for maximum heap " \
1976 1976 "size; deprecated: to be renamed to MaxRAMFraction") \
1977 1977 \
1978 1978 product(uintx, MinRAMFraction, 2, \
1979 1979 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
1980 1980 "size on systems with small physical memory size") \
1981 1981 \
1982 1982 product(uintx, InitialRAMFraction, 64, \
1983 1983 "Fraction (1/n) of real memory used for initial heap size") \
1984 1984 \
1985 1985 product(bool, UseAutoGCSelectPolicy, false, \
1986 1986 "Use automatic collection selection policy") \
1987 1987 \
1988 1988 product(uintx, AutoGCSelectPauseMillis, 5000, \
1989 1989 "Automatic GC selection pause threshhold in ms") \
1990 1990 \
1991 1991 product(bool, UseAdaptiveSizePolicy, true, \
1992 1992 "Use adaptive generation sizing policies") \
1993 1993 \
1994 1994 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
1995 1995 "Use adaptive survivor sizing policies") \
1996 1996 \
1997 1997 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
1998 1998 "Use adaptive young-old sizing policies at minor collections") \
1999 1999 \
2000 2000 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2001 2001 "Use adaptive young-old sizing policies at major collections") \
2002 2002 \
2003 2003 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2004 2004 "Use statistics from System.GC for adaptive size policy") \
2005 2005 \
2006 2006 product(bool, UseAdaptiveGCBoundary, false, \
2007 2007 "Allow young-old boundary to move") \
2008 2008 \
2009 2009 develop(bool, TraceAdaptiveGCBoundary, false, \
2010 2010 "Trace young-old boundary moves") \
2011 2011 \
2012 2012 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2013 2013 "Resize the virtual spaces of the young or old generations") \
2014 2014 \
2015 2015 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2016 2016 "Policy for changeing generation size for throughput goals") \
2017 2017 \
2018 2018 product(uintx, AdaptiveSizePausePolicy, 0, \
2019 2019 "Policy for changing generation size for pause goals") \
2020 2020 \
2021 2021 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2022 2022 "Adjust tenured generation to achive a minor pause goal") \
2023 2023 \
2024 2024 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2025 2025 "Adjust young generation to achive a major pause goal") \
2026 2026 \
2027 2027 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2028 2028 "Number of steps where heuristics is used before data is used") \
2029 2029 \
2030 2030 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2031 2031 "Number of collections before the adaptive sizing is started") \
2032 2032 \
2033 2033 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2034 2034 "Collecton interval for printing information; zero => never") \
2035 2035 \
2036 2036 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2037 2037 "Use adaptive minimum footprint as a goal") \
2038 2038 \
2039 2039 product(uintx, AdaptiveSizePolicyWeight, 10, \
2040 2040 "Weight given to exponential resizing, between 0 and 100") \
2041 2041 \
2042 2042 product(uintx, AdaptiveTimeWeight, 25, \
2043 2043 "Weight given to time in adaptive policy, between 0 and 100") \
2044 2044 \
2045 2045 product(uintx, PausePadding, 1, \
2046 2046 "How much buffer to keep for pause time") \
2047 2047 \
2048 2048 product(uintx, PromotedPadding, 3, \
2049 2049 "How much buffer to keep for promotion failure") \
2050 2050 \
2051 2051 product(uintx, SurvivorPadding, 3, \
2052 2052 "How much buffer to keep for survivor overflow") \
2053 2053 \
2054 2054 product(uintx, AdaptivePermSizeWeight, 20, \
2055 2055 "Weight for perm gen exponential resizing, between 0 and 100") \
2056 2056 \
2057 2057 product(uintx, PermGenPadding, 3, \
2058 2058 "How much buffer to keep for perm gen sizing") \
2059 2059 \
2060 2060 product(uintx, ThresholdTolerance, 10, \
2061 2061 "Allowed collection cost difference between generations") \
2062 2062 \
2063 2063 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2064 2064 "If collection costs are within margin, reduce both by full " \
2065 2065 "delta") \
2066 2066 \
2067 2067 product(uintx, YoungGenerationSizeIncrement, 20, \
2068 2068 "Adaptive size percentage change in young generation") \
2069 2069 \
2070 2070 product(uintx, YoungGenerationSizeSupplement, 80, \
2071 2071 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2072 2072 \
2073 2073 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2074 2074 "Decay factor to YoungedGenerationSizeSupplement") \
2075 2075 \
2076 2076 product(uintx, TenuredGenerationSizeIncrement, 20, \
2077 2077 "Adaptive size percentage change in tenured generation") \
2078 2078 \
2079 2079 product(uintx, TenuredGenerationSizeSupplement, 80, \
2080 2080 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2081 2081 \
2082 2082 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2083 2083 "Decay factor to TenuredGenerationSizeIncrement") \
2084 2084 \
2085 2085 product(uintx, MaxGCPauseMillis, max_uintx, \
2086 2086 "Adaptive size policy maximum GC pause time goal in msec, " \
2087 2087 "or (G1 Only) the max. GC time per MMU time slice") \
2088 2088 \
2089 2089 product(uintx, GCPauseIntervalMillis, 0, \
2090 2090 "Time slice for MMU specification") \
2091 2091 \
2092 2092 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2093 2093 "Adaptive size policy maximum GC minor pause time goal in msec") \
2094 2094 \
2095 2095 product(uintx, GCTimeRatio, 99, \
2096 2096 "Adaptive size policy application time to GC time ratio") \
2097 2097 \
2098 2098 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2099 2099 "Adaptive size scale down factor for shrinking") \
2100 2100 \
2101 2101 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2102 2102 "Adaptive size decays the major cost for long major intervals") \
2103 2103 \
2104 2104 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2105 2105 "Time scale over which major costs decay") \
2106 2106 \
2107 2107 product(uintx, MinSurvivorRatio, 3, \
2108 2108 "Minimum ratio of young generation/survivor space size") \
2109 2109 \
2110 2110 product(uintx, InitialSurvivorRatio, 8, \
2111 2111 "Initial ratio of eden/survivor space size") \
2112 2112 \
2113 2113 product(uintx, BaseFootPrintEstimate, 256*M, \
2114 2114 "Estimate of footprint other than Java Heap") \
2115 2115 \
2116 2116 product(bool, UseGCOverheadLimit, true, \
2117 2117 "Use policy to limit of proportion of time spent in GC " \
2118 2118 "before an OutOfMemory error is thrown") \
2119 2119 \
2120 2120 product(uintx, GCTimeLimit, 98, \
2121 2121 "Limit of proportion of time spent in GC before an OutOfMemory" \
2122 2122 "error is thrown (used with GCHeapFreeLimit)") \
2123 2123 \
2124 2124 product(uintx, GCHeapFreeLimit, 2, \
2125 2125 "Minimum percentage of free space after a full GC before an " \
2126 2126 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2127 2127 \
2128 2128 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2129 2129 "Number of consecutive collections before gc time limit fires") \
2130 2130 \
2131 2131 product(bool, PrintAdaptiveSizePolicy, false, \
2132 2132 "Print information about AdaptiveSizePolicy") \
2133 2133 \
2134 2134 product(intx, PrefetchCopyIntervalInBytes, -1, \
2135 2135 "How far ahead to prefetch destination area (<= 0 means off)") \
2136 2136 \
2137 2137 product(intx, PrefetchScanIntervalInBytes, -1, \
2138 2138 "How far ahead to prefetch scan area (<= 0 means off)") \
2139 2139 \
2140 2140 product(intx, PrefetchFieldsAhead, -1, \
2141 2141 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2142 2142 \
2143 2143 diagnostic(bool, VerifySilently, false, \
2144 2144 "Don't print print the verification progress") \
2145 2145 \
2146 2146 diagnostic(bool, VerifyDuringStartup, false, \
2147 2147 "Verify memory system before executing any Java code " \
2148 2148 "during VM initialization") \
2149 2149 \
2150 2150 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2151 2151 "Verify system before exiting") \
2152 2152 \
2153 2153 diagnostic(bool, VerifyBeforeGC, false, \
2154 2154 "Verify memory system before GC") \
2155 2155 \
2156 2156 diagnostic(bool, VerifyAfterGC, false, \
2157 2157 "Verify memory system after GC") \
2158 2158 \
2159 2159 diagnostic(bool, VerifyDuringGC, false, \
2160 2160 "Verify memory system during GC (between phases)") \
2161 2161 \
2162 2162 diagnostic(bool, GCParallelVerificationEnabled, true, \
2163 2163 "Enable parallel memory system verification") \
2164 2164 \
2165 2165 diagnostic(bool, DeferInitialCardMark, false, \
2166 2166 "When +ReduceInitialCardMarks, explicitly defer any that " \
2167 2167 "may arise from new_pre_store_barrier") \
2168 2168 \
2169 2169 diagnostic(bool, VerifyRememberedSets, false, \
2170 2170 "Verify GC remembered sets") \
2171 2171 \
2172 2172 diagnostic(bool, VerifyObjectStartArray, true, \
2173 2173 "Verify GC object start array if verify before/after") \
2174 2174 \
2175 2175 product(bool, DisableExplicitGC, false, \
2176 2176 "Tells whether calling System.gc() does a full GC") \
2177 2177 \
2178 2178 notproduct(bool, CheckMemoryInitialization, false, \
2179 2179 "Checks memory initialization") \
2180 2180 \
2181 2181 product(bool, CollectGen0First, false, \
2182 2182 "Collect youngest generation before each full GC") \
2183 2183 \
2184 2184 diagnostic(bool, BindCMSThreadToCPU, false, \
2185 2185 "Bind CMS Thread to CPU if possible") \
2186 2186 \
2187 2187 diagnostic(uintx, CPUForCMSThread, 0, \
2188 2188 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2189 2189 \
2190 2190 product(bool, BindGCTaskThreadsToCPUs, false, \
2191 2191 "Bind GCTaskThreads to CPUs if possible") \
2192 2192 \
2193 2193 product(bool, UseGCTaskAffinity, false, \
2194 2194 "Use worker affinity when asking for GCTasks") \
2195 2195 \
2196 2196 product(uintx, ProcessDistributionStride, 4, \
2197 2197 "Stride through processors when distributing processes") \
2198 2198 \
2199 2199 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2200 2200 "number of times the coordinator GC thread will sleep while " \
2201 2201 "yielding before giving up and resuming GC") \
2202 2202 \
2203 2203 product(uintx, CMSYieldSleepCount, 0, \
2204 2204 "number of times a GC thread (minus the coordinator) " \
2205 2205 "will sleep while yielding before giving up and resuming GC") \
2206 2206 \
2207 2207 /* gc tracing */ \
2208 2208 manageable(bool, PrintGC, false, \
2209 2209 "Print message at garbage collect") \
2210 2210 \
2211 2211 manageable(bool, PrintGCDetails, false, \
2212 2212 "Print more details at garbage collect") \
2213 2213 \
2214 2214 manageable(bool, PrintGCDateStamps, false, \
2215 2215 "Print date stamps at garbage collect") \
2216 2216 \
2217 2217 manageable(bool, PrintGCTimeStamps, false, \
2218 2218 "Print timestamps at garbage collect") \
2219 2219 \
2220 2220 product(bool, PrintGCTaskTimeStamps, false, \
2221 2221 "Print timestamps for individual gc worker thread tasks") \
2222 2222 \
2223 2223 develop(intx, ConcGCYieldTimeout, 0, \
2224 2224 "If non-zero, assert that GC threads yield within this # of ms.") \
2225 2225 \
2226 2226 notproduct(bool, TraceMarkSweep, false, \
2227 2227 "Trace mark sweep") \
2228 2228 \
2229 2229 product(bool, PrintReferenceGC, false, \
2230 2230 "Print times spent handling reference objects during GC " \
2231 2231 " (enabled only when PrintGCDetails)") \
2232 2232 \
2233 2233 develop(bool, TraceReferenceGC, false, \
2234 2234 "Trace handling of soft/weak/final/phantom references") \
2235 2235 \
2236 2236 develop(bool, TraceFinalizerRegistration, false, \
2237 2237 "Trace registration of final references") \
2238 2238 \
2239 2239 notproduct(bool, TraceScavenge, false, \
2240 2240 "Trace scavenge") \
2241 2241 \
2242 2242 product_rw(bool, TraceClassLoading, false, \
2243 2243 "Trace all classes loaded") \
2244 2244 \
2245 2245 product(bool, TraceClassLoadingPreorder, false, \
2246 2246 "Trace all classes loaded in order referenced (not loaded)") \
2247 2247 \
2248 2248 product_rw(bool, TraceClassUnloading, false, \
2249 2249 "Trace unloading of classes") \
2250 2250 \
2251 2251 product_rw(bool, TraceLoaderConstraints, false, \
2252 2252 "Trace loader constraints") \
2253 2253 \
2254 2254 product(bool, TraceGen0Time, false, \
2255 2255 "Trace accumulated time for Gen 0 collection") \
2256 2256 \
2257 2257 product(bool, TraceGen1Time, false, \
2258 2258 "Trace accumulated time for Gen 1 collection") \
2259 2259 \
2260 2260 product(bool, PrintTenuringDistribution, false, \
2261 2261 "Print tenuring age information") \
2262 2262 \
2263 2263 product_rw(bool, PrintHeapAtGC, false, \
2264 2264 "Print heap layout before and after each GC") \
2265 2265 \
2266 2266 product_rw(bool, PrintHeapAtGCExtended, false, \
2267 2267 "Prints extended information about the layout of the heap " \
2268 2268 "when -XX:+PrintHeapAtGC is set") \
2269 2269 \
2270 2270 product(bool, PrintHeapAtSIGBREAK, true, \
2271 2271 "Print heap layout in response to SIGBREAK") \
2272 2272 \
2273 2273 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2274 2274 "Print a class histogram before any major stop-world GC") \
2275 2275 \
2276 2276 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2277 2277 "Print a class histogram after any major stop-world GC") \
2278 2278 \
2279 2279 manageable(bool, PrintClassHistogram, false, \
2280 2280 "Print a histogram of class instances") \
2281 2281 \
2282 2282 develop(bool, TraceWorkGang, false, \
2283 2283 "Trace activities of work gangs") \
2284 2284 \
2285 2285 product(bool, TraceParallelOldGCTasks, false, \
2286 2286 "Trace multithreaded GC activity") \
2287 2287 \
2288 2288 develop(bool, TraceBlockOffsetTable, false, \
2289 2289 "Print BlockOffsetTable maps") \
2290 2290 \
2291 2291 develop(bool, TraceCardTableModRefBS, false, \
2292 2292 "Print CardTableModRefBS maps") \
2293 2293 \
2294 2294 develop(bool, TraceGCTaskManager, false, \
2295 2295 "Trace actions of the GC task manager") \
2296 2296 \
2297 2297 develop(bool, TraceGCTaskQueue, false, \
2298 2298 "Trace actions of the GC task queues") \
2299 2299 \
2300 2300 diagnostic(bool, TraceGCTaskThread, false, \
2301 2301 "Trace actions of the GC task threads") \
2302 2302 \
2303 2303 product(bool, PrintParallelOldGCPhaseTimes, false, \
2304 2304 "Print the time taken by each parallel old gc phase." \
2305 2305 "PrintGCDetails must also be enabled.") \
2306 2306 \
2307 2307 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2308 2308 "Trace parallel old gc marking phase") \
2309 2309 \
2310 2310 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2311 2311 "Trace parallel old gc summary phase") \
2312 2312 \
2313 2313 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2314 2314 "Trace parallel old gc compaction phase") \
2315 2315 \
2316 2316 develop(bool, TraceParallelOldGCDensePrefix, false, \
2317 2317 "Trace parallel old gc dense prefix computation") \
2318 2318 \
2319 2319 develop(bool, IgnoreLibthreadGPFault, false, \
2320 2320 "Suppress workaround for libthread GP fault") \
2321 2321 \
2322 2322 product(bool, PrintJNIGCStalls, false, \
2323 2323 "Print diagnostic message when GC is stalled" \
2324 2324 "by JNI critical section") \
2325 2325 \
2326 2326 experimental(double, ObjectCountCutOffPercent, 0.5, \
2327 2327 "The percentage of the used heap that the instances of a class " \
2328 2328 "must occupy for the class to generate a trace event.") \
2329 2329 \
2330 2330 /* GC log rotation setting */ \
2331 2331 \
2332 2332 product(bool, UseGCLogFileRotation, false, \
2333 2333 "Prevent large gclog file for long running app. " \
2334 2334 "Requires -Xloggc:<filename>") \
2335 2335 \
2336 2336 product(uintx, NumberOfGCLogFiles, 0, \
2337 2337 "Number of gclog files in rotation, " \
2338 2338 "Default: 0, no rotation") \
2339 2339 \
2340 2340 product(uintx, GCLogFileSize, 8*K, \
2341 2341 "GC log file size, requires UseGCLogFileRotation. " \
2342 2342 "Set to 0 to only trigger rotation via jcmd") \
2343 2343 \
2344 2344 /* JVMTI heap profiling */ \
2345 2345 \
2346 2346 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2347 2347 "Trace JVMTI object tagging calls") \
2348 2348 \
2349 2349 diagnostic(bool, VerifyBeforeIteration, false, \
2350 2350 "Verify memory system before JVMTI iteration") \
2351 2351 \
2352 2352 /* compiler interface */ \
2353 2353 \
2354 2354 develop(bool, CIPrintCompilerName, false, \
2355 2355 "when CIPrint is active, print the name of the active compiler") \
2356 2356 \
2357 2357 develop(bool, CIPrintCompileQueue, false, \
2358 2358 "display the contents of the compile queue whenever a " \
2359 2359 "compilation is enqueued") \
2360 2360 \
2361 2361 develop(bool, CIPrintRequests, false, \
2362 2362 "display every request for compilation") \
2363 2363 \
2364 2364 product(bool, CITime, false, \
2365 2365 "collect timing information for compilation") \
2366 2366 \
2367 2367 develop(bool, CITimeEach, false, \
2368 2368 "display timing information after each successful compilation") \
2369 2369 \
2370 2370 develop(bool, CICountOSR, false, \
2371 2371 "use a separate counter when assigning ids to osr compilations") \
2372 2372 \
2373 2373 develop(bool, CICompileNatives, true, \
2374 2374 "compile native methods if supported by the compiler") \
2375 2375 \
2376 2376 develop_pd(bool, CICompileOSR, \
2377 2377 "compile on stack replacement methods if supported by the " \
2378 2378 "compiler") \
2379 2379 \
2380 2380 develop(bool, CIPrintMethodCodes, false, \
2381 2381 "print method bytecodes of the compiled code") \
2382 2382 \
2383 2383 develop(bool, CIPrintTypeFlow, false, \
2384 2384 "print the results of ciTypeFlow analysis") \
2385 2385 \
2386 2386 develop(bool, CITraceTypeFlow, false, \
2387 2387 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2388 2388 \
2389 2389 develop(intx, OSROnlyBCI, -1, \
2390 2390 "OSR only at this bci. Negative values mean exclude that bci") \
2391 2391 \
2392 2392 /* compiler */ \
2393 2393 \
2394 2394 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2395 2395 "Number of compiler threads to run") \
2396 2396 \
2397 2397 product(intx, CompilationPolicyChoice, 0, \
2398 2398 "which compilation policy (0/1)") \
2399 2399 \
2400 2400 develop(bool, UseStackBanging, true, \
2401 2401 "use stack banging for stack overflow checks (required for " \
2402 2402 "proper StackOverflow handling; disable only to measure cost " \
2403 2403 "of stackbanging)") \
2404 2404 \
2405 2405 develop(bool, UseStrictFP, true, \
2406 2406 "use strict fp if modifier strictfp is set") \
2407 2407 \
2408 2408 develop(bool, GenerateSynchronizationCode, true, \
2409 2409 "generate locking/unlocking code for synchronized methods and " \
2410 2410 "monitors") \
2411 2411 \
2412 2412 develop(bool, GenerateCompilerNullChecks, true, \
2413 2413 "Generate explicit null checks for loads/stores/calls") \
2414 2414 \
2415 2415 develop(bool, GenerateRangeChecks, true, \
2416 2416 "Generate range checks for array accesses") \
2417 2417 \
2418 2418 develop_pd(bool, ImplicitNullChecks, \
2419 2419 "generate code for implicit null checks") \
2420 2420 \
2421 2421 product(bool, PrintSafepointStatistics, false, \
2422 2422 "print statistics about safepoint synchronization") \
2423 2423 \
2424 2424 product(intx, PrintSafepointStatisticsCount, 300, \
2425 2425 "total number of safepoint statistics collected " \
2426 2426 "before printing them out") \
2427 2427 \
2428 2428 product(intx, PrintSafepointStatisticsTimeout, -1, \
2429 2429 "print safepoint statistics only when safepoint takes" \
2430 2430 " more than PrintSafepointSatisticsTimeout in millis") \
2431 2431 \
2432 2432 product(bool, TraceSafepointCleanupTime, false, \
2433 2433 "print the break down of clean up tasks performed during" \
2434 2434 " safepoint") \
2435 2435 \
2436 2436 product(bool, Inline, true, \
2437 2437 "enable inlining") \
2438 2438 \
2439 2439 product(bool, ClipInlining, true, \
2440 2440 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2441 2441 \
2442 2442 develop(bool, UseCHA, true, \
2443 2443 "enable CHA") \
2444 2444 \
2445 2445 product(bool, UseTypeProfile, true, \
2446 2446 "Check interpreter profile for historically monomorphic calls") \
2447 2447 \
2448 2448 notproduct(bool, TimeCompiler, false, \
2449 2449 "time the compiler") \
2450 2450 \
2451 2451 diagnostic(bool, PrintInlining, false, \
2452 2452 "prints inlining optimizations") \
2453 2453 \
2454 2454 product(bool, UsePopCountInstruction, false, \
2455 2455 "Use population count instruction") \
2456 2456 \
2457 2457 develop(bool, EagerInitialization, false, \
2458 2458 "Eagerly initialize classes if possible") \
2459 2459 \
2460 2460 develop(bool, TraceMethodReplacement, false, \
2461 2461 "Print when methods are replaced do to recompilation") \
2462 2462 \
2463 2463 develop(bool, PrintMethodFlushing, false, \
2464 2464 "print the nmethods being flushed") \
2465 2465 \
2466 2466 develop(bool, UseRelocIndex, false, \
2467 2467 "use an index to speed random access to relocations") \
2468 2468 \
2469 2469 develop(bool, StressCodeBuffers, false, \
2470 2470 "Exercise code buffer expansion and other rare state changes") \
2471 2471 \
2472 2472 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2473 2473 "Generate extra debugging info for non-safepoints in nmethods") \
2474 2474 \
2475 2475 product(bool, PrintVMOptions, false, \
2476 2476 "Print flags that appeared on the command line") \
2477 2477 \
2478 2478 product(bool, IgnoreUnrecognizedVMOptions, false, \
2479 2479 "Ignore unrecognized VM options") \
2480 2480 \
2481 2481 product(bool, PrintCommandLineFlags, false, \
2482 2482 "Print flags specified on command line or set by ergonomics") \
2483 2483 \
2484 2484 product(bool, PrintFlagsInitial, false, \
2485 2485 "Print all VM flags before argument processing and exit VM") \
2486 2486 \
2487 2487 product(bool, PrintFlagsFinal, false, \
2488 2488 "Print all VM flags after argument and ergonomic processing") \
2489 2489 \
2490 2490 notproduct(bool, PrintFlagsWithComments, false, \
2491 2491 "Print all VM flags with default values and descriptions and exit")\
2492 2492 \
2493 2493 diagnostic(bool, SerializeVMOutput, true, \
2494 2494 "Use a mutex to serialize output to tty and hotspot.log") \
2495 2495 \
2496 2496 diagnostic(bool, DisplayVMOutput, true, \
2497 2497 "Display all VM output on the tty, independently of LogVMOutput") \
2498 2498 \
2499 2499 diagnostic(bool, LogVMOutput, trueInDebug, \
2500 2500 "Save VM output to hotspot.log, or to LogFile") \
2501 2501 \
2502 2502 diagnostic(ccstr, LogFile, NULL, \
2503 2503 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2504 2504 \
2505 2505 product(ccstr, ErrorFile, NULL, \
2506 2506 "If an error occurs, save the error data to this file " \
2507 2507 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2508 2508 \
2509 2509 product(bool, DisplayVMOutputToStderr, false, \
2510 2510 "If DisplayVMOutput is true, display all VM output to stderr") \
2511 2511 \
2512 2512 product(bool, DisplayVMOutputToStdout, false, \
2513 2513 "If DisplayVMOutput is true, display all VM output to stdout") \
2514 2514 \
2515 2515 product(bool, UseHeavyMonitors, false, \
2516 2516 "use heavyweight instead of lightweight Java monitors") \
2517 2517 \
2518 2518 product(bool, PrintStringTableStatistics, false, \
2519 2519 "print statistics about the StringTable and SymbolTable") \
2520 2520 \
2521 2521 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2522 2522 "print histogram of the symbol table") \
2523 2523 \
2524 2524 notproduct(bool, ExitVMOnVerifyError, false, \
2525 2525 "standard exit from VM if bytecode verify error " \
2526 2526 "(only in debug mode)") \
2527 2527 \
2528 2528 notproduct(ccstr, AbortVMOnException, NULL, \
2529 2529 "Call fatal if this exception is thrown. Example: " \
2530 2530 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2531 2531 \
2532 2532 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2533 2533 "Call fatal if the exception pointed by AbortVMOnException " \
2534 2534 "has this message.") \
2535 2535 \
2536 2536 develop(bool, DebugVtables, false, \
2537 2537 "add debugging code to vtable dispatch") \
2538 2538 \
2539 2539 develop(bool, PrintVtables, false, \
2540 2540 "print vtables when printing klass") \
2541 2541 \
2542 2542 notproduct(bool, PrintVtableStats, false, \
2543 2543 "print vtables stats at end of run") \
2544 2544 \
2545 2545 develop(bool, TraceCreateZombies, false, \
2546 2546 "trace creation of zombie nmethods") \
2547 2547 \
2548 2548 notproduct(bool, IgnoreLockingAssertions, false, \
2549 2549 "disable locking assertions (for speed)") \
2550 2550 \
2551 2551 product(bool, RangeCheckElimination, true, \
2552 2552 "Split loop iterations to eliminate range checks") \
2553 2553 \
2554 2554 develop_pd(bool, UncommonNullCast, \
2555 2555 "track occurrences of null in casts; adjust compiler tactics") \
2556 2556 \
2557 2557 develop(bool, TypeProfileCasts, true, \
2558 2558 "treat casts like calls for purposes of type profiling") \
2559 2559 \
2560 2560 develop(bool, DelayCompilationDuringStartup, true, \
2561 2561 "Delay invoking the compiler until main application class is " \
2562 2562 "loaded") \
2563 2563 \
2564 2564 develop(bool, CompileTheWorld, false, \
2565 2565 "Compile all methods in all classes in bootstrap class path " \
2566 2566 "(stress test)") \
2567 2567 \
2568 2568 develop(bool, CompileTheWorldPreloadClasses, true, \
2569 2569 "Preload all classes used by a class before start loading") \
2570 2570 \
2571 2571 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2572 2572 "Force a safepoint every n compiles so sweeper can keep up") \
2573 2573 \
2574 2574 develop(bool, FillDelaySlots, true, \
2575 2575 "Fill delay slots (on SPARC only)") \
2576 2576 \
2577 2577 develop(bool, TimeLivenessAnalysis, false, \
2578 2578 "Time computation of bytecode liveness analysis") \
2579 2579 \
2580 2580 develop(bool, TraceLivenessGen, false, \
2581 2581 "Trace the generation of liveness analysis information") \
2582 2582 \
2583 2583 notproduct(bool, TraceLivenessQuery, false, \
2584 2584 "Trace queries of liveness analysis information") \
2585 2585 \
2586 2586 notproduct(bool, CollectIndexSetStatistics, false, \
2587 2587 "Collect information about IndexSets") \
2588 2588 \
2589 2589 develop(bool, UseLoopSafepoints, true, \
2590 2590 "Generate Safepoint nodes in every loop") \
2591 2591 \
2592 2592 develop(intx, FastAllocateSizeLimit, 128*K, \
2593 2593 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2594 2594 "Inline allocations larger than this in doublewords must go slow")\
2595 2595 \
2596 2596 product(bool, AggressiveOpts, false, \
2597 2597 "Enable aggressive optimizations - see arguments.cpp") \
2598 2598 \
2599 2599 product(bool, UseStringCache, false, \
2600 2600 "Enable String cache capabilities on String.java") \
2601 2601 \
2602 2602 /* statistics */ \
2603 2603 develop(bool, CountCompiledCalls, false, \
2604 2604 "counts method invocations") \
2605 2605 \
2606 2606 notproduct(bool, CountRuntimeCalls, false, \
2607 2607 "counts VM runtime calls") \
2608 2608 \
2609 2609 develop(bool, CountJNICalls, false, \
2610 2610 "counts jni method invocations") \
2611 2611 \
2612 2612 notproduct(bool, CountJVMCalls, false, \
2613 2613 "counts jvm method invocations") \
2614 2614 \
2615 2615 notproduct(bool, CountRemovableExceptions, false, \
2616 2616 "count exceptions that could be replaced by branches due to " \
2617 2617 "inlining") \
2618 2618 \
2619 2619 notproduct(bool, ICMissHistogram, false, \
2620 2620 "produce histogram of IC misses") \
2621 2621 \
2622 2622 notproduct(bool, PrintClassStatistics, false, \
2623 2623 "prints class statistics at end of run") \
2624 2624 \
2625 2625 notproduct(bool, PrintMethodStatistics, false, \
2626 2626 "prints method statistics at end of run") \
2627 2627 \
2628 2628 /* interpreter */ \
2629 2629 develop(bool, ClearInterpreterLocals, false, \
2630 2630 "Always clear local variables of interpreter activations upon " \
2631 2631 "entry") \
2632 2632 \
2633 2633 product_pd(bool, RewriteBytecodes, \
2634 2634 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2635 2635 \
2636 2636 product_pd(bool, RewriteFrequentPairs, \
2637 2637 "Rewrite frequently used bytecode pairs into a single bytecode") \
2638 2638 \
2639 2639 diagnostic(bool, PrintInterpreter, false, \
2640 2640 "Prints the generated interpreter code") \
2641 2641 \
2642 2642 product(bool, UseInterpreter, true, \
2643 2643 "Use interpreter for non-compiled methods") \
2644 2644 \
2645 2645 develop(bool, UseFastSignatureHandlers, true, \
2646 2646 "Use fast signature handlers for native calls") \
2647 2647 \
2648 2648 product(bool, UseLoopCounter, true, \
2649 2649 "Increment invocation counter on backward branch") \
2650 2650 \
2651 2651 product(bool, UseFastEmptyMethods, true, \
2652 2652 "Use fast method entry code for empty methods") \
2653 2653 \
2654 2654 product(bool, UseFastAccessorMethods, true, \
2655 2655 "Use fast method entry code for accessor methods") \
2656 2656 \
2657 2657 product_pd(bool, UseOnStackReplacement, \
2658 2658 "Use on stack replacement, calls runtime if invoc. counter " \
2659 2659 "overflows in loop") \
2660 2660 \
2661 2661 notproduct(bool, TraceOnStackReplacement, false, \
2662 2662 "Trace on stack replacement") \
2663 2663 \
2664 2664 product_pd(bool, PreferInterpreterNativeStubs, \
2665 2665 "Use always interpreter stubs for native methods invoked via " \
2666 2666 "interpreter") \
2667 2667 \
2668 2668 develop(bool, CountBytecodes, false, \
2669 2669 "Count number of bytecodes executed") \
2670 2670 \
2671 2671 develop(bool, PrintBytecodeHistogram, false, \
2672 2672 "Print histogram of the executed bytecodes") \
2673 2673 \
2674 2674 develop(bool, PrintBytecodePairHistogram, false, \
2675 2675 "Print histogram of the executed bytecode pairs") \
2676 2676 \
2677 2677 diagnostic(bool, PrintSignatureHandlers, false, \
2678 2678 "Print code generated for native method signature handlers") \
2679 2679 \
2680 2680 develop(bool, VerifyOops, false, \
2681 2681 "Do plausibility checks for oops") \
2682 2682 \
2683 2683 develop(bool, CheckUnhandledOops, false, \
2684 2684 "Check for unhandled oops in VM code") \
2685 2685 \
2686 2686 develop(bool, VerifyJNIFields, trueInDebug, \
2687 2687 "Verify jfieldIDs for instance fields") \
2688 2688 \
2689 2689 notproduct(bool, VerifyJNIEnvThread, false, \
2690 2690 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2691 2691 "from JNI") \
2692 2692 \
2693 2693 develop(bool, VerifyFPU, false, \
2694 2694 "Verify FPU state (check for NaN's, etc.)") \
2695 2695 \
2696 2696 develop(bool, VerifyThread, false, \
2697 2697 "Watch the thread register for corruption (SPARC only)") \
2698 2698 \
2699 2699 develop(bool, VerifyActivationFrameSize, false, \
2700 2700 "Verify that activation frame didn't become smaller than its " \
2701 2701 "minimal size") \
2702 2702 \
2703 2703 develop(bool, TraceFrequencyInlining, false, \
2704 2704 "Trace frequency based inlining") \
2705 2705 \
2706 2706 develop_pd(bool, InlineIntrinsics, \
2707 2707 "Inline intrinsics that can be statically resolved") \
2708 2708 \
2709 2709 product_pd(bool, ProfileInterpreter, \
2710 2710 "Profile at the bytecode level during interpretation") \
2711 2711 \
2712 2712 develop_pd(bool, ProfileTraps, \
2713 2713 "Profile deoptimization traps at the bytecode level") \
2714 2714 \
2715 2715 product(intx, ProfileMaturityPercentage, 20, \
2716 2716 "number of method invocations/branches (expressed as % of " \
2717 2717 "CompileThreshold) before using the method's profile") \
2718 2718 \
2719 2719 develop(bool, PrintMethodData, false, \
2720 2720 "Print the results of +ProfileInterpreter at end of run") \
2721 2721 \
2722 2722 develop(bool, VerifyDataPointer, trueInDebug, \
2723 2723 "Verify the method data pointer during interpreter profiling") \
2724 2724 \
2725 2725 develop(bool, VerifyCompiledCode, false, \
2726 2726 "Include miscellaneous runtime verifications in nmethod code; " \
2727 2727 "default off because it disturbs nmethod size heuristics") \
2728 2728 \
2729 2729 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2730 2730 "Manually make GC thread crash then dump java stack trace; " \
2731 2731 "Test only") \
2732 2732 \
2733 2733 /* compilation */ \
2734 2734 product(bool, UseCompiler, true, \
2735 2735 "use compilation") \
2736 2736 \
2737 2737 develop(bool, TraceCompilationPolicy, false, \
2738 2738 "Trace compilation policy") \
2739 2739 \
2740 2740 develop(bool, TimeCompilationPolicy, false, \
2741 2741 "Time the compilation policy") \
2742 2742 \
2743 2743 product(bool, UseCounterDecay, true, \
2744 2744 "adjust recompilation counters") \
2745 2745 \
2746 2746 develop(intx, CounterHalfLifeTime, 30, \
2747 2747 "half-life time of invocation counters (in secs)") \
2748 2748 \
2749 2749 develop(intx, CounterDecayMinIntervalLength, 500, \
2750 2750 "Min. ms. between invocation of CounterDecay") \
2751 2751 \
2752 2752 product(bool, AlwaysCompileLoopMethods, false, \
2753 2753 "when using recompilation, never interpret methods " \
2754 2754 "containing loops") \
2755 2755 \
2756 2756 product(bool, DontCompileHugeMethods, true, \
2757 2757 "don't compile methods > HugeMethodLimit") \
2758 2758 \
2759 2759 /* Bytecode escape analysis estimation. */ \
2760 2760 product(bool, EstimateArgEscape, true, \
2761 2761 "Analyze bytecodes to estimate escape state of arguments") \
2762 2762 \
2763 2763 product(intx, BCEATraceLevel, 0, \
2764 2764 "How much tracing to do of bytecode escape analysis estimates") \
2765 2765 \
2766 2766 product(intx, MaxBCEAEstimateLevel, 5, \
2767 2767 "Maximum number of nested calls that are analyzed by BC EA.") \
2768 2768 \
2769 2769 product(intx, MaxBCEAEstimateSize, 150, \
2770 2770 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2771 2771 \
2772 2772 product(intx, AllocatePrefetchStyle, 1, \
2773 2773 "0 = no prefetch, " \
2774 2774 "1 = prefetch instructions for each allocation, " \
2775 2775 "2 = use TLAB watermark to gate allocation prefetch, " \
2776 2776 "3 = use BIS instruction on Sparc for allocation prefetch") \
2777 2777 \
2778 2778 product(intx, AllocatePrefetchDistance, -1, \
2779 2779 "Distance to prefetch ahead of allocation pointer") \
2780 2780 \
2781 2781 product(intx, AllocatePrefetchLines, 3, \
2782 2782 "Number of lines to prefetch ahead of array allocation pointer") \
2783 2783 \
2784 2784 product(intx, AllocateInstancePrefetchLines, 1, \
2785 2785 "Number of lines to prefetch ahead of instance allocation pointer") \
2786 2786 \
2787 2787 product(intx, AllocatePrefetchStepSize, 16, \
2788 2788 "Step size in bytes of sequential prefetch instructions") \
2789 2789 \
2790 2790 product(intx, AllocatePrefetchInstr, 0, \
2791 2791 "Prefetch instruction to prefetch ahead of allocation pointer") \
2792 2792 \
2793 2793 /* deoptimization */ \
2794 2794 develop(bool, TraceDeoptimization, false, \
2795 2795 "Trace deoptimization") \
2796 2796 \
2797 2797 develop(bool, DebugDeoptimization, false, \
2798 2798 "Tracing various information while debugging deoptimization") \
2799 2799 \
2800 2800 product(intx, SelfDestructTimer, 0, \
2801 2801 "Will cause VM to terminate after a given time (in minutes) " \
2802 2802 "(0 means off)") \
2803 2803 \
2804 2804 product(intx, MaxJavaStackTraceDepth, 1024, \
2805 2805 "Max. no. of lines in the stack trace for Java exceptions " \
2806 2806 "(0 means all)") \
2807 2807 \
2808 2808 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
2809 2809 "Guarantee a safepoint (at least) every so many milliseconds " \
2810 2810 "(0 means none)")) \
2811 2811 \
2812 2812 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
2813 2813 "Guarantee a safepoint (at least) every so many milliseconds " \
2814 2814 "(0 means none)")) \
2815 2815 \
2816 2816 product(intx, SafepointTimeoutDelay, 10000, \
2817 2817 "Delay in milliseconds for option SafepointTimeout") \
2818 2818 \
2819 2819 product(intx, NmethodSweepFraction, 16, \
2820 2820 "Number of invocations of sweeper to cover all nmethods") \
2821 2821 \
2822 2822 product(intx, NmethodSweepCheckInterval, 5, \
2823 2823 "Compilers wake up every n seconds to possibly sweep nmethods") \
2824 2824 \
2825 2825 notproduct(bool, LogSweeper, false, \
2826 2826 "Keep a ring buffer of sweeper activity") \
2827 2827 \
2828 2828 notproduct(intx, SweeperLogEntries, 1024, \
2829 2829 "Number of records in the ring buffer of sweeper activity") \
2830 2830 \
2831 2831 notproduct(intx, MemProfilingInterval, 500, \
2832 2832 "Time between each invocation of the MemProfiler") \
2833 2833 \
2834 2834 develop(intx, MallocCatchPtr, -1, \
2835 2835 "Hit breakpoint when mallocing/freeing this pointer") \
2836 2836 \
2837 2837 notproduct(intx, AssertRepeat, 1, \
2838 2838 "number of times to evaluate expression in assert " \
2839 2839 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2840 2840 \
2841 2841 notproduct(ccstrlist, SuppressErrorAt, "", \
2842 2842 "List of assertions (file:line) to muzzle") \
2843 2843 \
2844 2844 notproduct(uintx, HandleAllocationLimit, 1024, \
2845 2845 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2846 2846 "is used") \
2847 2847 \
2848 2848 develop(uintx, TotalHandleAllocationLimit, 1024, \
2849 2849 "Threshold for total handle allocation when " \
2850 2850 "+TraceHandleAllocation is used") \
2851 2851 \
2852 2852 develop(intx, StackPrintLimit, 100, \
2853 2853 "number of stack frames to print in VM-level stack dump") \
2854 2854 \
2855 2855 notproduct(intx, MaxElementPrintSize, 256, \
2856 2856 "maximum number of elements to print") \
2857 2857 \
2858 2858 notproduct(intx, MaxSubklassPrintSize, 4, \
2859 2859 "maximum number of subklasses to print when printing klass") \
2860 2860 \
2861 2861 product(intx, MaxInlineLevel, 9, \
2862 2862 "maximum number of nested calls that are inlined") \
2863 2863 \
2864 2864 product(intx, MaxRecursiveInlineLevel, 1, \
2865 2865 "maximum number of nested recursive calls that are inlined") \
2866 2866 \
2867 2867 product_pd(intx, InlineSmallCode, \
2868 2868 "Only inline already compiled methods if their code size is " \
2869 2869 "less than this") \
2870 2870 \
2871 2871 product(intx, MaxInlineSize, 35, \
2872 2872 "maximum bytecode size of a method to be inlined") \
2873 2873 \
2874 2874 product_pd(intx, FreqInlineSize, \
2875 2875 "maximum bytecode size of a frequent method to be inlined") \
2876 2876 \
2877 2877 product(intx, MaxTrivialSize, 6, \
2878 2878 "maximum bytecode size of a trivial method to be inlined") \
2879 2879 \
2880 2880 product(intx, MinInliningThreshold, 250, \
2881 2881 "min. invocation count a method needs to have to be inlined") \
2882 2882 \
2883 2883 develop(intx, MethodHistogramCutoff, 100, \
2884 2884 "cutoff value for method invoc. histogram (+CountCalls)") \
2885 2885 \
2886 2886 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
2887 2887 "# of interpreted methods to show in profile") \
2888 2888 \
2889 2889 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
2890 2890 "# of compiled methods to show in profile") \
2891 2891 \
2892 2892 develop(intx, ProfilerNumberOfStubMethods, 25, \
2893 2893 "# of stub methods to show in profile") \
2894 2894 \
2895 2895 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
2896 2896 "# of runtime stub nodes to show in profile") \
2897 2897 \
2898 2898 product(intx, ProfileIntervalsTicks, 100, \
2899 2899 "# of ticks between printing of interval profile " \
2900 2900 "(+ProfileIntervals)") \
2901 2901 \
2902 2902 notproduct(intx, ScavengeALotInterval, 1, \
2903 2903 "Interval between which scavenge will occur with +ScavengeALot") \
2904 2904 \
2905 2905 notproduct(intx, FullGCALotInterval, 1, \
2906 2906 "Interval between which full gc will occur with +FullGCALot") \
2907 2907 \
2908 2908 notproduct(intx, FullGCALotStart, 0, \
2909 2909 "For which invocation to start FullGCAlot") \
2910 2910 \
2911 2911 notproduct(intx, FullGCALotDummies, 32*K, \
2912 2912 "Dummy object allocated with +FullGCALot, forcing all objects " \
2913 2913 "to move") \
2914 2914 \
2915 2915 develop(intx, DontYieldALotInterval, 10, \
2916 2916 "Interval between which yields will be dropped (milliseconds)") \
2917 2917 \
2918 2918 develop(intx, MinSleepInterval, 1, \
2919 2919 "Minimum sleep() interval (milliseconds) when " \
2920 2920 "ConvertSleepToYield is off (used for SOLARIS)") \
2921 2921 \
2922 2922 develop(intx, ProfilerPCTickThreshold, 15, \
2923 2923 "Number of ticks in a PC buckets to be a hotspot") \
2924 2924 \
2925 2925 notproduct(intx, DeoptimizeALotInterval, 5, \
2926 2926 "Number of exits until DeoptimizeALot kicks in") \
2927 2927 \
2928 2928 notproduct(intx, ZombieALotInterval, 5, \
2929 2929 "Number of exits until ZombieALot kicks in") \
2930 2930 \
2931 2931 develop(bool, StressNonEntrant, false, \
2932 2932 "Mark nmethods non-entrant at registration") \
2933 2933 \
2934 2934 diagnostic(intx, MallocVerifyInterval, 0, \
2935 2935 "if non-zero, verify C heap after every N calls to " \
2936 2936 "malloc/realloc/free") \
2937 2937 \
2938 2938 diagnostic(intx, MallocVerifyStart, 0, \
2939 2939 "if non-zero, start verifying C heap after Nth call to " \
2940 2940 "malloc/realloc/free") \
2941 2941 \
2942 2942 product(intx, TypeProfileWidth, 2, \
2943 2943 "number of receiver types to record in call/cast profile") \
2944 2944 \
2945 2945 develop(intx, BciProfileWidth, 2, \
2946 2946 "number of return bci's to record in ret profile") \
2947 2947 \
2948 2948 product(intx, PerMethodRecompilationCutoff, 400, \
2949 2949 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
2950 2950 \
2951 2951 product(intx, PerBytecodeRecompilationCutoff, 200, \
2952 2952 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
2953 2953 \
2954 2954 product(intx, PerMethodTrapLimit, 100, \
2955 2955 "Limit on traps (of one kind) in a method (includes inlines)") \
2956 2956 \
2957 2957 product(intx, PerBytecodeTrapLimit, 4, \
2958 2958 "Limit on traps (of one kind) at a particular BCI") \
2959 2959 \
2960 2960 develop(intx, InlineFrequencyRatio, 20, \
2961 2961 "Ratio of call site execution to caller method invocation") \
2962 2962 \
2963 2963 develop_pd(intx, InlineFrequencyCount, \
2964 2964 "Count of call site execution necessary to trigger frequent " \
2965 2965 "inlining") \
2966 2966 \
2967 2967 develop(intx, InlineThrowCount, 50, \
2968 2968 "Force inlining of interpreted methods that throw this often") \
2969 2969 \
2970 2970 develop(intx, InlineThrowMaxSize, 200, \
2971 2971 "Force inlining of throwing methods smaller than this") \
2972 2972 \
2973 2973 develop(intx, ProfilerNodeSize, 1024, \
2974 2974 "Size in K to allocate for the Profile Nodes of each thread") \
2975 2975 \
2976 2976 product_pd(intx, PreInflateSpin, \
2977 2977 "Number of times to spin wait before inflation") \
2978 2978 \
2979 2979 /* gc parameters */ \
2980 2980 product(uintx, InitialHeapSize, 0, \
2981 2981 "Initial heap size (in bytes); zero means OldSize + NewSize") \
2982 2982 \
2983 2983 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
2984 2984 "Maximum heap size (in bytes)") \
2985 2985 \
2986 2986 product(uintx, OldSize, ScaleForWordSize(4*M), \
2987 2987 "Initial tenured generation size (in bytes)") \
2988 2988 \
2989 2989 product(uintx, NewSize, ScaleForWordSize(1*M), \
2990 2990 "Initial new generation size (in bytes)") \
2991 2991 \
2992 2992 product(uintx, MaxNewSize, max_uintx, \
2993 2993 "Maximum new generation size (in bytes), max_uintx means set " \
2994 2994 "ergonomically") \
2995 2995 \
2996 2996 product(uintx, PretenureSizeThreshold, 0, \
2997 2997 "Maximum size in bytes of objects allocated in DefNew " \
2998 2998 "generation; zero means no maximum") \
2999 2999 \
3000 3000 product(uintx, TLABSize, 0, \
3001 3001 "Starting TLAB size (in bytes); zero means set ergonomically") \
3002 3002 \
3003 3003 product(uintx, MinTLABSize, 2*K, \
3004 3004 "Minimum allowed TLAB size (in bytes)") \
3005 3005 \
3006 3006 product(uintx, TLABAllocationWeight, 35, \
3007 3007 "Allocation averaging weight") \
3008 3008 \
3009 3009 product(uintx, TLABWasteTargetPercent, 1, \
3010 3010 "Percentage of Eden that can be wasted") \
3011 3011 \
3012 3012 product(uintx, TLABRefillWasteFraction, 64, \
3013 3013 "Max TLAB waste at a refill (internal fragmentation)") \
3014 3014 \
3015 3015 product(uintx, TLABWasteIncrement, 4, \
3016 3016 "Increment allowed waste at slow allocation") \
3017 3017 \
3018 3018 product(intx, SurvivorRatio, 8, \
3019 3019 "Ratio of eden/survivor space size") \
3020 3020 \
3021 3021 product(intx, NewRatio, 2, \
3022 3022 "Ratio of new/old generation sizes") \
3023 3023 \
3024 3024 product_pd(uintx, NewSizeThreadIncrease, \
3025 3025 "Additional size added to desired new generation size per " \
3026 3026 "non-daemon thread (in bytes)") \
3027 3027 \
3028 3028 product_pd(uintx, PermSize, \
3029 3029 "Initial size of permanent generation (in bytes)") \
3030 3030 \
3031 3031 product_pd(uintx, MaxPermSize, \
3032 3032 "Maximum size of permanent generation (in bytes)") \
3033 3033 \
3034 3034 manageable(uintx, MinHeapFreeRatio, 40, \
3035 3035 "Min percentage of heap free after GC to avoid expansion") \
3036 3036 \
3037 3037 manageable(uintx, MaxHeapFreeRatio, 70, \
3038 3038 "Max percentage of heap free after GC to avoid shrinking") \
3039 3039 \
3040 3040 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3041 3041 "Number of milliseconds per MB of free space in the heap") \
3042 3042 \
3043 3043 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3044 3044 "Min change in heap space due to GC (in bytes)") \
3045 3045 \
3046 3046 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \
3047 3047 "Min expansion of permanent heap (in bytes)") \
3048 3048 \
3049 3049 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \
3050 3050 "Max expansion of permanent heap without full GC (in bytes)") \
3051 3051 \
3052 3052 product(intx, QueuedAllocationWarningCount, 0, \
3053 3053 "Number of times an allocation that queues behind a GC " \
3054 3054 "will retry before printing a warning") \
3055 3055 \
3056 3056 diagnostic(uintx, VerifyGCStartAt, 0, \
3057 3057 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3058 3058 \
3059 3059 diagnostic(intx, VerifyGCLevel, 0, \
3060 3060 "Generation level at which to start +VerifyBefore/AfterGC") \
3061 3061 \
3062 3062 product(intx, MaxTenuringThreshold, 15, \
3063 3063 "Maximum value for tenuring threshold") \
3064 3064 \
3065 3065 product(intx, InitialTenuringThreshold, 7, \
3066 3066 "Initial value for tenuring threshold") \
3067 3067 \
3068 3068 product(intx, TargetSurvivorRatio, 50, \
3069 3069 "Desired percentage of survivor space used after scavenge") \
3070 3070 \
3071 3071 product(uintx, MarkSweepDeadRatio, 5, \
3072 3072 "Percentage (0-100) of the old gen allowed as dead wood." \
3073 3073 "Serial mark sweep treats this as both the min and max value." \
3074 3074 "CMS uses this value only if it falls back to mark sweep." \
3075 3075 "Par compact uses a variable scale based on the density of the" \
3076 3076 "generation and treats this as the max value when the heap is" \
3077 3077 "either completely full or completely empty. Par compact also" \
3078 3078 "has a smaller default value; see arguments.cpp.") \
3079 3079 \
3080 3080 product(uintx, PermMarkSweepDeadRatio, 20, \
3081 3081 "Percentage (0-100) of the perm gen allowed as dead wood." \
3082 3082 "See MarkSweepDeadRatio for collector-specific comments.") \
3083 3083 \
3084 3084 product(intx, MarkSweepAlwaysCompactCount, 4, \
3085 3085 "How often should we fully compact the heap (ignoring the dead " \
3086 3086 "space parameters)") \
3087 3087 \
3088 3088 product(intx, PrintCMSStatistics, 0, \
3089 3089 "Statistics for CMS") \
3090 3090 \
3091 3091 product(bool, PrintCMSInitiationStatistics, false, \
3092 3092 "Statistics for initiating a CMS collection") \
3093 3093 \
3094 3094 product(intx, PrintFLSStatistics, 0, \
3095 3095 "Statistics for CMS' FreeListSpace") \
3096 3096 \
3097 3097 product(intx, PrintFLSCensus, 0, \
3098 3098 "Census for CMS' FreeListSpace") \
3099 3099 \
3100 3100 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3101 3101 "Delay in ms between expansion and allocation") \
3102 3102 \
3103 3103 product(intx, DeferThrSuspendLoopCount, 4000, \
3104 3104 "(Unstable) Number of times to iterate in safepoint loop " \
3105 3105 " before blocking VM threads ") \
3106 3106 \
3107 3107 product(intx, DeferPollingPageLoopCount, -1, \
3108 3108 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3109 3109 "before changing safepoint polling page to RO ") \
3110 3110 \
3111 3111 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3112 3112 \
3113 3113 product(bool, PSChunkLargeArrays, true, \
3114 3114 "true: process large arrays in chunks") \
3115 3115 \
3116 3116 product(uintx, GCDrainStackTargetSize, 64, \
3117 3117 "how many entries we'll try to leave on the stack during " \
3118 3118 "parallel GC") \
3119 3119 \
3120 3120 /* stack parameters */ \
3121 3121 product_pd(intx, StackYellowPages, \
3122 3122 "Number of yellow zone (recoverable overflows) pages") \
3123 3123 \
3124 3124 product_pd(intx, StackRedPages, \
3125 3125 "Number of red zone (unrecoverable overflows) pages") \
3126 3126 \
3127 3127 product_pd(intx, StackShadowPages, \
3128 3128 "Number of shadow zone (for overflow checking) pages" \
3129 3129 " this should exceed the depth of the VM and native call stack") \
3130 3130 \
3131 3131 product_pd(intx, ThreadStackSize, \
3132 3132 "Thread Stack Size (in Kbytes)") \
3133 3133 \
3134 3134 product_pd(intx, VMThreadStackSize, \
3135 3135 "Non-Java Thread Stack Size (in Kbytes)") \
3136 3136 \
3137 3137 product_pd(intx, CompilerThreadStackSize, \
3138 3138 "Compiler Thread Stack Size (in Kbytes)") \
3139 3139 \
3140 3140 develop_pd(uintx, JVMInvokeMethodSlack, \
3141 3141 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3142 3142 \
3143 3143 product(uintx, ThreadSafetyMargin, 50*M, \
3144 3144 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3145 3145 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3146 3146 "disable this feature") \
3147 3147 \
3148 3148 /* code cache parameters */ \
3149 3149 develop(uintx, CodeCacheSegmentSize, 64, \
3150 3150 "Code cache segment size (in bytes) - smallest unit of " \
3151 3151 "allocation") \
3152 3152 \
3153 3153 develop_pd(intx, CodeEntryAlignment, \
3154 3154 "Code entry alignment for generated code (in bytes)") \
3155 3155 \
3156 3156 product_pd(intx, OptoLoopAlignment, \
3157 3157 "Align inner loops to zero relative to this modulus") \
3158 3158 \
3159 3159 product_pd(uintx, InitialCodeCacheSize, \
3160 3160 "Initial code cache size (in bytes)") \
3161 3161 \
3162 3162 product_pd(uintx, ReservedCodeCacheSize, \
3163 3163 "Reserved code cache size (in bytes) - maximum code cache size") \
3164 3164 \
3165 3165 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3166 3166 "When less than X space left, we stop compiling.") \
3167 3167 \
3168 3168 product_pd(uintx, CodeCacheExpansionSize, \
3169 3169 "Code cache expansion size (in bytes)") \
3170 3170 \
3171 3171 develop_pd(uintx, CodeCacheMinBlockLength, \
3172 3172 "Minimum number of segments in a code cache block.") \
3173 3173 \
3174 3174 notproduct(bool, ExitOnFullCodeCache, false, \
3175 3175 "Exit the VM if we fill the code cache.") \
3176 3176 \
3177 3177 product(bool, UseCodeCacheFlushing, true, \
3178 3178 "Attempt to clean the code cache before shutting off compiler") \
3179 3179 \
3180 3180 product(intx, MinCodeCacheFlushingInterval, 30, \
3181 3181 "Min number of seconds between code cache cleaning sessions") \
3182 3182 \
3183 3183 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \
3184 3184 "When less than X space left, start code cache cleaning") \
3185 3185 \
3186 3186 /* interpreter debugging */ \
3187 3187 develop(intx, BinarySwitchThreshold, 5, \
3188 3188 "Minimal number of lookupswitch entries for rewriting to binary " \
3189 3189 "switch") \
3190 3190 \
3191 3191 develop(intx, StopInterpreterAt, 0, \
3192 3192 "Stops interpreter execution at specified bytecode number") \
3193 3193 \
3194 3194 develop(intx, TraceBytecodesAt, 0, \
3195 3195 "Traces bytecodes starting with specified bytecode number") \
3196 3196 \
3197 3197 /* compiler interface */ \
3198 3198 develop(intx, CIStart, 0, \
3199 3199 "the id of the first compilation to permit") \
3200 3200 \
3201 3201 develop(intx, CIStop, -1, \
3202 3202 "the id of the last compilation to permit") \
3203 3203 \
3204 3204 develop(intx, CIStartOSR, 0, \
3205 3205 "the id of the first osr compilation to permit " \
3206 3206 "(CICountOSR must be on)") \
3207 3207 \
3208 3208 develop(intx, CIStopOSR, -1, \
3209 3209 "the id of the last osr compilation to permit " \
3210 3210 "(CICountOSR must be on)") \
3211 3211 \
3212 3212 develop(intx, CIBreakAtOSR, -1, \
3213 3213 "id of osr compilation to break at") \
3214 3214 \
3215 3215 develop(intx, CIBreakAt, -1, \
3216 3216 "id of compilation to break at") \
3217 3217 \
3218 3218 product(ccstrlist, CompileOnly, "", \
3219 3219 "List of methods (pkg/class.name) to restrict compilation to") \
3220 3220 \
3221 3221 product(ccstr, CompileCommandFile, NULL, \
3222 3222 "Read compiler commands from this file [.hotspot_compiler]") \
3223 3223 \
3224 3224 product(ccstrlist, CompileCommand, "", \
3225 3225 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3226 3226 \
3227 3227 product(bool, CICompilerCountPerCPU, false, \
3228 3228 "1 compiler thread for log(N CPUs)") \
3229 3229 \
3230 3230 develop(intx, CIFireOOMAt, -1, \
3231 3231 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3232 3232 "(non-negative value throws OOM after this many CI accesses " \
3233 3233 "in each compile)") \
3234 3234 \
3235 3235 notproduct(bool, CIObjectFactoryVerify, false, \
3236 3236 "enable potentially expensive verification in ciObjectFactory") \
3237 3237 \
3238 3238 /* Priorities */ \
3239 3239 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3240 3240 \
3241 3241 product(intx, ThreadPriorityPolicy, 0, \
3242 3242 "0 : Normal. "\
3243 3243 " VM chooses priorities that are appropriate for normal "\
3244 3244 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3245 3245 " to normal native priority. Java priorities below NORM_PRIORITY"\
3246 3246 " map to lower native priority values. On Windows applications"\
3247 3247 " are allowed to use higher native priorities. However, with "\
3248 3248 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
3249 3249 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
3250 3250 " interfere with system threads. On Linux thread priorities "\
3251 3251 " are ignored because the OS does not support static priority "\
3252 3252 " in SCHED_OTHER scheduling class which is the only choice for"\
3253 3253 " non-root, non-realtime applications. "\
3254 3254 "1 : Aggressive. "\
3255 3255 " Java thread priorities map over to the entire range of "\
3256 3256 " native thread priorities. Higher Java thread priorities map "\
3257 3257 " to higher native thread priorities. This policy should be "\
3258 3258 " used with care, as sometimes it can cause performance "\
3259 3259 " degradation in the application and/or the entire system. On "\
3260 3260 " Linux this policy requires root privilege.") \
3261 3261 \
3262 3262 product(bool, ThreadPriorityVerbose, false, \
3263 3263 "Print priority changes") \
3264 3264 \
3265 3265 product(intx, DefaultThreadPriority, -1, \
3266 3266 "The native priority at which threads run if not elsewhere " \
3267 3267 "specified (-1 means no change)") \
3268 3268 \
3269 3269 product(intx, CompilerThreadPriority, -1, \
3270 3270 "The native priority at which compiler threads should run " \
3271 3271 "(-1 means no change)") \
3272 3272 \
3273 3273 product(intx, VMThreadPriority, -1, \
3274 3274 "The native priority at which the VM thread should run " \
3275 3275 "(-1 means no change)") \
3276 3276 \
3277 3277 product(bool, CompilerThreadHintNoPreempt, true, \
3278 3278 "(Solaris only) Give compiler threads an extra quanta") \
3279 3279 \
3280 3280 product(bool, VMThreadHintNoPreempt, false, \
3281 3281 "(Solaris only) Give VM thread an extra quanta") \
3282 3282 \
3283 3283 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3284 3284 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3285 3285 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3286 3286 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3287 3287 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3288 3288 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3289 3289 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3290 3290 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3291 3291 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3292 3292 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3293 3293 \
3294 3294 experimental(bool, UseCriticalJavaThreadPriority, false, \
3295 3295 "Java thread priority 10 maps to critical scheduling priority") \
3296 3296 \
3297 3297 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3298 3298 "Compiler thread(s) run at critical scheduling priority") \
3299 3299 \
3300 3300 experimental(bool, UseCriticalCMSThreadPriority, false, \
3301 3301 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3302 3302 \
3303 3303 /* compiler debugging */ \
3304 3304 notproduct(intx, CompileTheWorldStartAt, 1, \
3305 3305 "First class to consider when using +CompileTheWorld") \
3306 3306 \
3307 3307 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3308 3308 "Last class to consider when using +CompileTheWorld") \
3309 3309 \
3310 3310 develop(intx, NewCodeParameter, 0, \
3311 3311 "Testing Only: Create a dedicated integer parameter before " \
3312 3312 "putback") \
3313 3313 \
3314 3314 /* new oopmap storage allocation */ \
3315 3315 develop(intx, MinOopMapAllocation, 8, \
3316 3316 "Minimum number of OopMap entries in an OopMapSet") \
3317 3317 \
3318 3318 /* Background Compilation */ \
3319 3319 develop(intx, LongCompileThreshold, 50, \
3320 3320 "Used with +TraceLongCompiles") \
3321 3321 \
3322 3322 product(intx, StarvationMonitorInterval, 200, \
3323 3323 "Pause between each check in ms") \
3324 3324 \
3325 3325 /* recompilation */ \
3326 3326 product_pd(intx, CompileThreshold, \
3327 3327 "number of interpreted method invocations before (re-)compiling") \
3328 3328 \
3329 3329 product_pd(intx, BackEdgeThreshold, \
3330 3330 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3331 3331 \
3332 3332 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3333 3333 "Interpreter (tier 0) invocation notification frequency.") \
3334 3334 \
3335 3335 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3336 3336 "C1 without MDO (tier 2) invocation notification frequency.") \
3337 3337 \
3338 3338 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3339 3339 "C1 with MDO profiling (tier 3) invocation notification " \
3340 3340 "frequency.") \
3341 3341 \
3342 3342 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3343 3343 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3344 3344 \
3345 3345 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3346 3346 "Interpreter (tier 0) invocation notification frequency.") \
3347 3347 \
3348 3348 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3349 3349 "C1 without MDO (tier 2) invocation notification frequency.") \
3350 3350 \
3351 3351 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3352 3352 "C1 with MDO profiling (tier 3) invocation notification " \
3353 3353 "frequency.") \
3354 3354 \
3355 3355 product(intx, Tier2CompileThreshold, 0, \
3356 3356 "threshold at which tier 2 compilation is invoked") \
3357 3357 \
3358 3358 product(intx, Tier2BackEdgeThreshold, 0, \
3359 3359 "Back edge threshold at which tier 2 compilation is invoked") \
3360 3360 \
3361 3361 product(intx, Tier3InvocationThreshold, 200, \
3362 3362 "Compile if number of method invocations crosses this " \
3363 3363 "threshold") \
3364 3364 \
3365 3365 product(intx, Tier3MinInvocationThreshold, 100, \
3366 3366 "Minimum invocation to compile at tier 3") \
3367 3367 \
3368 3368 product(intx, Tier3CompileThreshold, 2000, \
3369 3369 "Threshold at which tier 3 compilation is invoked (invocation " \
3370 3370 "minimum must be satisfied.") \
3371 3371 \
3372 3372 product(intx, Tier3BackEdgeThreshold, 60000, \
3373 3373 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3374 3374 \
3375 3375 product(intx, Tier4InvocationThreshold, 5000, \
3376 3376 "Compile if number of method invocations crosses this " \
3377 3377 "threshold") \
3378 3378 \
3379 3379 product(intx, Tier4MinInvocationThreshold, 600, \
3380 3380 "Minimum invocation to compile at tier 4") \
3381 3381 \
3382 3382 product(intx, Tier4CompileThreshold, 15000, \
3383 3383 "Threshold at which tier 4 compilation is invoked (invocation " \
3384 3384 "minimum must be satisfied.") \
3385 3385 \
3386 3386 product(intx, Tier4BackEdgeThreshold, 40000, \
3387 3387 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3388 3388 \
3389 3389 product(intx, Tier3DelayOn, 5, \
3390 3390 "If C2 queue size grows over this amount per compiler thread " \
3391 3391 "stop compiling at tier 3 and start compiling at tier 2") \
3392 3392 \
3393 3393 product(intx, Tier3DelayOff, 2, \
3394 3394 "If C2 queue size is less than this amount per compiler thread " \
3395 3395 "allow methods compiled at tier 2 transition to tier 3") \
3396 3396 \
3397 3397 product(intx, Tier3LoadFeedback, 5, \
3398 3398 "Tier 3 thresholds will increase twofold when C1 queue size " \
3399 3399 "reaches this amount per compiler thread") \
3400 3400 \
3401 3401 product(intx, Tier4LoadFeedback, 3, \
3402 3402 "Tier 4 thresholds will increase twofold when C2 queue size " \
3403 3403 "reaches this amount per compiler thread") \
3404 3404 \
3405 3405 product(intx, TieredCompileTaskTimeout, 50, \
3406 3406 "Kill compile task if method was not used within " \
3407 3407 "given timeout in milliseconds") \
3408 3408 \
3409 3409 product(intx, TieredStopAtLevel, 4, \
3410 3410 "Stop at given compilation level") \
3411 3411 \
3412 3412 product(intx, Tier0ProfilingStartPercentage, 200, \
3413 3413 "Start profiling in interpreter if the counters exceed tier 3" \
3414 3414 "thresholds by the specified percentage") \
3415 3415 \
3416 3416 product(intx, TieredRateUpdateMinTime, 1, \
3417 3417 "Minimum rate sampling interval (in milliseconds)") \
3418 3418 \
3419 3419 product(intx, TieredRateUpdateMaxTime, 25, \
3420 3420 "Maximum rate sampling interval (in milliseconds)") \
3421 3421 \
3422 3422 product_pd(bool, TieredCompilation, \
3423 3423 "Enable tiered compilation") \
3424 3424 \
3425 3425 product(bool, PrintTieredEvents, false, \
3426 3426 "Print tiered events notifications") \
3427 3427 \
3428 3428 product_pd(intx, OnStackReplacePercentage, \
3429 3429 "NON_TIERED number of method invocations/branches (expressed as %"\
3430 3430 "of CompileThreshold) before (re-)compiling OSR code") \
3431 3431 \
3432 3432 product(intx, InterpreterProfilePercentage, 33, \
3433 3433 "NON_TIERED number of method invocations/branches (expressed as %"\
3434 3434 "of CompileThreshold) before profiling in the interpreter") \
3435 3435 \
3436 3436 develop(intx, MaxRecompilationSearchLength, 10, \
3437 3437 "max. # frames to inspect searching for recompilee") \
3438 3438 \
3439 3439 develop(intx, MaxInterpretedSearchLength, 3, \
3440 3440 "max. # interp. frames to skip when searching for recompilee") \
3441 3441 \
3442 3442 develop(intx, DesiredMethodLimit, 8000, \
3443 3443 "desired max. method size (in bytecodes) after inlining") \
3444 3444 \
3445 3445 develop(intx, HugeMethodLimit, 8000, \
3446 3446 "don't compile methods larger than this if " \
3447 3447 "+DontCompileHugeMethods") \
3448 3448 \
3449 3449 /* New JDK 1.4 reflection implementation */ \
3450 3450 \
3451 3451 develop(bool, UseNewReflection, true, \
3452 3452 "Temporary flag for transition to reflection based on dynamic " \
3453 3453 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3454 3454 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3455 3455 "changes were needed") \
3456 3456 \
3457 3457 develop(bool, VerifyReflectionBytecodes, false, \
3458 3458 "Force verification of 1.4 reflection bytecodes. Does not work " \
3459 3459 "in situations like that described in 4486457 or for " \
3460 3460 "constructors generated for serialization, so can not be enabled "\
3461 3461 "in product.") \
3462 3462 \
3463 3463 product(bool, ReflectionWrapResolutionErrors, true, \
3464 3464 "Temporary flag for transition to AbstractMethodError wrapped " \
3465 3465 "in InvocationTargetException. See 6531596") \
3466 3466 \
3467 3467 \
3468 3468 develop(intx, FastSuperclassLimit, 8, \
3469 3469 "Depth of hardwired instanceof accelerator array") \
3470 3470 \
3471 3471 /* Properties for Java libraries */ \
3472 3472 \
3473 3473 product(uintx, MaxDirectMemorySize, 0, \
3474 3474 "Maximum total size of NIO direct-buffer allocations") \
3475 3475 \
3476 3476 /* temporary developer defined flags */ \
3477 3477 \
3478 3478 diagnostic(bool, UseNewCode, false, \
3479 3479 "Testing Only: Use the new version while testing") \
3480 3480 \
3481 3481 diagnostic(bool, UseNewCode2, false, \
3482 3482 "Testing Only: Use the new version while testing") \
3483 3483 \
3484 3484 diagnostic(bool, UseNewCode3, false, \
3485 3485 "Testing Only: Use the new version while testing") \
3486 3486 \
3487 3487 /* flags for performance data collection */ \
3488 3488 \
3489 3489 product(bool, UsePerfData, falseInEmbedded, \
3490 3490 "Flag to disable jvmstat instrumentation for performance testing" \
3491 3491 "and problem isolation purposes.") \
3492 3492 \
3493 3493 product(bool, PerfDataSaveToFile, false, \
3494 3494 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3495 3495 \
3496 3496 product(ccstr, PerfDataSaveFile, NULL, \
3497 3497 "Save PerfData memory to the specified absolute pathname," \
3498 3498 "%p in the file name if present will be replaced by pid") \
3499 3499 \
3500 3500 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3501 3501 "Data sampling interval in milliseconds") \
3502 3502 \
3503 3503 develop(bool, PerfTraceDataCreation, false, \
3504 3504 "Trace creation of Performance Data Entries") \
3505 3505 \
3506 3506 develop(bool, PerfTraceMemOps, false, \
3507 3507 "Trace PerfMemory create/attach/detach calls") \
3508 3508 \
3509 3509 product(bool, PerfDisableSharedMem, false, \
3510 3510 "Store performance data in standard memory") \
3511 3511 \
3512 3512 product(intx, PerfDataMemorySize, 32*K, \
3513 3513 "Size of performance data memory region. Will be rounded " \
3514 3514 "up to a multiple of the native os page size.") \
3515 3515 \
3516 3516 product(intx, PerfMaxStringConstLength, 1024, \
3517 3517 "Maximum PerfStringConstant string length before truncation") \
3518 3518 \
3519 3519 product(bool, PerfAllowAtExitRegistration, false, \
3520 3520 "Allow registration of atexit() methods") \
3521 3521 \
3522 3522 product(bool, PerfBypassFileSystemCheck, false, \
3523 3523 "Bypass Win32 file system criteria checks (Windows Only)") \
3524 3524 \
3525 3525 product(intx, UnguardOnExecutionViolation, 0, \
3526 3526 "Unguard page and retry on no-execute fault (Win32 only)" \
3527 3527 "0=off, 1=conservative, 2=aggressive") \
3528 3528 \
3529 3529 /* Serviceability Support */ \
3530 3530 \
3531 3531 product(bool, ManagementServer, false, \
3532 3532 "Create JMX Management Server") \
3533 3533 \
3534 3534 product(bool, DisableAttachMechanism, false, \
3535 3535 "Disable mechanism that allows tools to attach to this VM") \
3536 3536 \
3537 3537 product(bool, StartAttachListener, false, \
3538 3538 "Always start Attach Listener at VM startup") \
3539 3539 \
3540 3540 manageable(bool, PrintConcurrentLocks, false, \
3541 3541 "Print java.util.concurrent locks in thread dump") \
3542 3542 \
3543 3543 product(bool, TransmitErrorReport, false, \
3544 3544 "Enable error report transmission on erroneous termination") \
3545 3545 \
3546 3546 product(ccstr, ErrorReportServer, NULL, \
3547 3547 "Override built-in error report server address") \
3548 3548 \
3549 3549 /* Shared spaces */ \
3550 3550 \
3551 3551 product(bool, UseSharedSpaces, true, \
3552 3552 "Use shared spaces in the permanent generation") \
3553 3553 \
3554 3554 product(bool, RequireSharedSpaces, false, \
3555 3555 "Require shared spaces in the permanent generation") \
3556 3556 \
3557 3557 product(bool, DumpSharedSpaces, false, \
3558 3558 "Special mode: JVM reads a class list, loads classes, builds " \
3559 3559 "shared spaces, and dumps the shared spaces to a file to be " \
3560 3560 "used in future JVM runs.") \
3561 3561 \
3562 3562 product(bool, PrintSharedSpaces, false, \
3563 3563 "Print usage of shared spaces") \
3564 3564 \
3565 3565 product(uintx, SharedDummyBlockSize, 512*M, \
3566 3566 "Size of dummy block used to shift heap addresses (in bytes)") \
3567 3567 \
3568 3568 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(13*M), \
3569 3569 "Size of read-write space in permanent generation (in bytes)") \
3570 3570 \
3571 3571 product(uintx, SharedReadOnlySize, 10*M, \
3572 3572 "Size of read-only space in permanent generation (in bytes)") \
3573 3573 \
3574 3574 product(uintx, SharedMiscDataSize, NOT_LP64(4*M) LP64_ONLY(5*M) NOT_PRODUCT(+1*M), \
3575 3575 "Size of the shared data area adjacent to the heap (in bytes)") \
3576 3576 \
3577 3577 product(uintx, SharedMiscCodeSize, 4*M, \
3578 3578 "Size of the shared code area adjacent to the heap (in bytes)") \
3579 3579 \
3580 3580 diagnostic(bool, SharedOptimizeColdStart, true, \
3581 3581 "At dump time, order shared objects to achieve better " \
3582 3582 "cold startup time.") \
3583 3583 \
3584 3584 develop(intx, SharedOptimizeColdStartPolicy, 2, \
3585 3585 "Reordering policy for SharedOptimizeColdStart " \
3586 3586 "0=favor classload-time locality, 1=balanced, " \
3587 3587 "2=favor runtime locality") \
3588 3588 \
3589 3589 diagnostic(bool, SharedSkipVerify, false, \
3590 3590 "Skip assert() and verify() which page-in unwanted shared " \
3591 3591 "objects. ") \
3592 3592 \
3593 3593 diagnostic(bool, EnableInvokeDynamic, true, \
3594 3594 "support JSR 292 (method handles, invokedynamic, " \
3595 3595 "anonymous classes") \
3596 3596 \
3597 3597 diagnostic(bool, PrintMethodHandleStubs, false, \
3598 3598 "Print generated stub code for method handles") \
3599 3599 \
3600 3600 develop(bool, TraceMethodHandles, false, \
3601 3601 "trace internal method handle operations") \
3602 3602 \
3603 3603 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3604 3604 "perform extra checks when constructing method handles") \
3605 3605 \
3606 3606 diagnostic(bool, ShowHiddenFrames, false, \
3607 3607 "show method handle implementation frames (usually hidden)") \
3608 3608 \
3609 3609 experimental(bool, TrustFinalNonStaticFields, false, \
3610 3610 "trust final non-static declarations for constant folding") \
3611 3611 \
3612 3612 develop(bool, TraceInvokeDynamic, false, \
3613 3613 "trace internal invoke dynamic operations") \
3614 3614 \
3615 3615 diagnostic(bool, PauseAtStartup, false, \
3616 3616 "Causes the VM to pause at startup time and wait for the pause " \
3617 3617 "file to be removed (default: ./vm.paused.<pid>)") \
3618 3618 \
3619 3619 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3620 3620 "The file to create and for whose removal to await when pausing " \
3621 3621 "at startup. (default: ./vm.paused.<pid>)") \
3622 3622 \
3623 3623 diagnostic(bool, PauseAtExit, false, \
3624 3624 "Pause and wait for keypress on exit if a debugger is attached") \
3625 3625 \
3626 3626 product(bool, ExtendedDTraceProbes, false, \
3627 3627 "Enable performance-impacting dtrace probes") \
3628 3628 \
3629 3629 product(bool, DTraceMethodProbes, false, \
3630 3630 "Enable dtrace probes for method-entry and method-exit") \
3631 3631 \
3632 3632 product(bool, DTraceAllocProbes, false, \
3633 3633 "Enable dtrace probes for object allocation") \
3634 3634 \
3635 3635 product(bool, DTraceMonitorProbes, false, \
3636 3636 "Enable dtrace probes for monitor events") \
3637 3637 \
3638 3638 product(bool, RelaxAccessControlCheck, false, \
3639 3639 "Relax the access control checks in the verifier") \
3640 3640 \
3641 3641 diagnostic(bool, PrintDTraceDOF, false, \
3642 3642 "Print the DTrace DOF passed to the system for JSDT probes") \
3643 3643 \
3644 3644 product(uintx, StringTableSize, NOT_LP64(1009) LP64_ONLY(60013), \
3645 3645 "Number of buckets in the interned String table") \
3646 3646 \
3647 3647 product(bool, UseVMInterruptibleIO, false, \
3648 3648 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3649 3649 "EINTR for I/O operations results in OS_INTRPT. The default value"\
3650 3650 " of this flag is true for JDK 6 and earlier") \
3651 3651 \
3652 3652 product(bool, AllowNonVirtualCalls, false, \
3653 3653 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3654 3654 \
3655 3655 diagnostic(bool, WhiteBoxAPI, false, \
3656 3656 "Enable internal testing APIs") \
3657 3657 \
3658 3658 product(bool, PrintGCCause, true, \
3659 3659 "Include GC cause in GC logging") \
3660 3660 \
3661 3661 experimental(uintx, ArrayAllocatorMallocLimit, \
3662 3662 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
3663 3663 "Allocation less than this value will be allocated " \
3664 3664 "using malloc. Larger allocations will use mmap.") \
3665 3665 \
3666 3666 product(bool, EnableTracing, false, \
3667 3667 "Enable event-based tracing") \
3668 3668 product(bool, UseLockedTracing, false, \
3669 3669 "Use locked-tracing when doing event-based tracing")
3670 3670
3671 3671 /*
3672 3672 * Macros for factoring of globals
3673 3673 */
3674 3674
3675 3675 // Interface macros
3676 3676 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3677 3677 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3678 3678 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3679 3679 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3680 3680 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3681 3681 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3682 3682 #ifdef PRODUCT
3683 3683 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
3684 3684 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
3685 3685 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3686 3686 #else
3687 3687 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3688 3688 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3689 3689 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3690 3690 #endif
3691 3691 // Special LP64 flags, product only needed for now.
3692 3692 #ifdef _LP64
3693 3693 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3694 3694 #else
3695 3695 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3696 3696 #endif // _LP64
3697 3697
3698 3698 // Implementation macros
3699 3699 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3700 3700 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3701 3701 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3702 3702 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3703 3703 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3704 3704 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3705 3705 #ifdef PRODUCT
3706 3706 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3707 3707 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
3708 3708 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3709 3709 #else
3710 3710 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3711 3711 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3712 3712 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3713 3713 #endif
3714 3714 #ifdef _LP64
3715 3715 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3716 3716 #else
3717 3717 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3718 3718 #endif // _LP64
3719 3719
3720 3720 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG)
3721 3721
3722 3722 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3723 3723
3724 3724 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3725 3725
3726 3726 // Extensions
3727 3727
3728 3728 #include "runtime/globals_ext.hpp"
3729 3729
3730 3730 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
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