1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
27
28 #include "utilities/debug.hpp"
29
30 // use this for flags that are true per default in the tiered build
31 // but false in non-tiered builds, and vice versa
32 #ifdef TIERED
33 #define trueInTiered true
34 #define falseInTiered false
35 #else
36 #define trueInTiered false
37 #define falseInTiered true
38 #endif
39
40 #ifdef TARGET_ARCH_x86
41 # include "globals_x86.hpp"
42 #endif
43 #ifdef TARGET_ARCH_sparc
44 # include "globals_sparc.hpp"
45 #endif
46 #ifdef TARGET_ARCH_zero
47 # include "globals_zero.hpp"
48 #endif
49 #ifdef TARGET_ARCH_arm
50 # include "globals_arm.hpp"
51 #endif
52 #ifdef TARGET_ARCH_ppc
53 # include "globals_ppc.hpp"
54 #endif
55 #ifdef TARGET_OS_FAMILY_linux
56 # include "globals_linux.hpp"
57 #endif
58 #ifdef TARGET_OS_FAMILY_solaris
59 # include "globals_solaris.hpp"
60 #endif
61 #ifdef TARGET_OS_FAMILY_windows
62 # include "globals_windows.hpp"
63 #endif
64 #ifdef TARGET_OS_FAMILY_bsd
65 # include "globals_bsd.hpp"
66 #endif
67 #ifdef TARGET_OS_ARCH_linux_x86
68 # include "globals_linux_x86.hpp"
69 #endif
70 #ifdef TARGET_OS_ARCH_linux_sparc
71 # include "globals_linux_sparc.hpp"
72 #endif
73 #ifdef TARGET_OS_ARCH_linux_zero
74 # include "globals_linux_zero.hpp"
75 #endif
76 #ifdef TARGET_OS_ARCH_solaris_x86
77 # include "globals_solaris_x86.hpp"
78 #endif
79 #ifdef TARGET_OS_ARCH_solaris_sparc
80 # include "globals_solaris_sparc.hpp"
81 #endif
82 #ifdef TARGET_OS_ARCH_windows_x86
83 # include "globals_windows_x86.hpp"
84 #endif
85 #ifdef TARGET_OS_ARCH_linux_arm
86 # include "globals_linux_arm.hpp"
87 #endif
88 #ifdef TARGET_OS_ARCH_linux_ppc
89 # include "globals_linux_ppc.hpp"
90 #endif
91 #ifdef TARGET_OS_ARCH_bsd_x86
92 # include "globals_bsd_x86.hpp"
93 #endif
94 #ifdef TARGET_OS_ARCH_bsd_zero
95 # include "globals_bsd_zero.hpp"
96 #endif
97 #ifdef COMPILER1
98 #ifdef TARGET_ARCH_x86
99 # include "c1_globals_x86.hpp"
100 #endif
101 #ifdef TARGET_ARCH_sparc
102 # include "c1_globals_sparc.hpp"
103 #endif
104 #ifdef TARGET_ARCH_arm
105 # include "c1_globals_arm.hpp"
106 #endif
107 #ifdef TARGET_ARCH_ppc
108 # include "c1_globals_ppc.hpp"
109 #endif
110 #ifdef TARGET_OS_FAMILY_linux
111 # include "c1_globals_linux.hpp"
112 #endif
113 #ifdef TARGET_OS_FAMILY_solaris
114 # include "c1_globals_solaris.hpp"
115 #endif
116 #ifdef TARGET_OS_FAMILY_windows
117 # include "c1_globals_windows.hpp"
118 #endif
119 #ifdef TARGET_OS_FAMILY_bsd
120 # include "c1_globals_bsd.hpp"
121 #endif
122 #endif
123 #ifdef COMPILER2
124 #ifdef TARGET_ARCH_x86
125 # include "c2_globals_x86.hpp"
126 #endif
127 #ifdef TARGET_ARCH_sparc
128 # include "c2_globals_sparc.hpp"
129 #endif
130 #ifdef TARGET_ARCH_arm
131 # include "c2_globals_arm.hpp"
132 #endif
133 #ifdef TARGET_OS_FAMILY_linux
134 # include "c2_globals_linux.hpp"
135 #endif
136 #ifdef TARGET_OS_FAMILY_solaris
137 # include "c2_globals_solaris.hpp"
138 #endif
139 #ifdef TARGET_OS_FAMILY_windows
140 # include "c2_globals_windows.hpp"
141 #endif
142 #ifdef TARGET_OS_FAMILY_bsd
143 # include "c2_globals_bsd.hpp"
144 #endif
145 #endif
146 #ifdef SHARK
147 #ifdef TARGET_ARCH_zero
148 # include "shark_globals_zero.hpp"
149 #endif
150 #endif
151
152 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
153 define_pd_global(bool, BackgroundCompilation, false);
154 define_pd_global(bool, UseTLAB, false);
155 define_pd_global(bool, CICompileOSR, false);
156 define_pd_global(bool, UseTypeProfile, false);
157 define_pd_global(bool, UseOnStackReplacement, false);
158 define_pd_global(bool, InlineIntrinsics, false);
159 define_pd_global(bool, PreferInterpreterNativeStubs, true);
160 define_pd_global(bool, ProfileInterpreter, false);
161 define_pd_global(bool, ProfileTraps, false);
162 define_pd_global(bool, TieredCompilation, false);
163
164 define_pd_global(intx, CompileThreshold, 0);
165 define_pd_global(intx, BackEdgeThreshold, 0);
166
167 define_pd_global(intx, OnStackReplacePercentage, 0);
168 define_pd_global(bool, ResizeTLAB, false);
169 define_pd_global(intx, FreqInlineSize, 0);
170 define_pd_global(intx, InlineSmallCode, 0);
171 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
172 define_pd_global(intx, InlineClassNatives, true);
173 define_pd_global(intx, InlineUnsafeOps, true);
174 define_pd_global(intx, InitialCodeCacheSize, 160*K);
175 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
176 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
177 define_pd_global(intx, CodeCacheMinBlockLength, 1);
178 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M));
179 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
180 define_pd_global(bool, NeverActAsServerClassMachine, true);
181 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
182 #define CI_COMPILER_COUNT 0
183 #else
184
185 #ifdef COMPILER2
186 #define CI_COMPILER_COUNT 2
187 #else
188 #define CI_COMPILER_COUNT 1
189 #endif // COMPILER2
190
191 #endif // no compilers
192
193 // string type aliases used only in this file
194 typedef const char* ccstr;
195 typedef const char* ccstrlist; // represents string arguments which accumulate
196
197 enum FlagValueOrigin {
198 DEFAULT = 0,
199 COMMAND_LINE = 1,
200 ENVIRON_VAR = 2,
201 CONFIG_FILE = 3,
202 MANAGEMENT = 4,
203 ERGONOMIC = 5,
204 ATTACH_ON_DEMAND = 6,
205 INTERNAL = 99
206 };
207
208 struct Flag {
209 const char *type;
210 const char *name;
211 void* addr;
212
213 NOT_PRODUCT(const char *doc;)
214
215 const char *kind;
216 FlagValueOrigin origin;
217
218 // points to all Flags static array
219 static Flag *flags;
220
221 // number of flags
222 static size_t numFlags;
223
224 static Flag* find_flag(char* name, size_t length, bool allow_locked = false);
225
226 bool is_bool() const { return strcmp(type, "bool") == 0; }
227 bool get_bool() const { return *((bool*) addr); }
228 void set_bool(bool value) { *((bool*) addr) = value; }
229
230 bool is_intx() const { return strcmp(type, "intx") == 0; }
231 intx get_intx() const { return *((intx*) addr); }
232 void set_intx(intx value) { *((intx*) addr) = value; }
233
234 bool is_uintx() const { return strcmp(type, "uintx") == 0; }
235 uintx get_uintx() const { return *((uintx*) addr); }
236 void set_uintx(uintx value) { *((uintx*) addr) = value; }
237
238 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; }
239 uint64_t get_uint64_t() const { return *((uint64_t*) addr); }
240 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; }
241
242 bool is_double() const { return strcmp(type, "double") == 0; }
243 double get_double() const { return *((double*) addr); }
244 void set_double(double value) { *((double*) addr) = value; }
245
246 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
247 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
248 ccstr get_ccstr() const { return *((ccstr*) addr); }
249 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
250
251 bool is_unlocker() const;
252 bool is_unlocked() const;
253 bool is_writeable() const;
254 bool is_external() const;
255
256 bool is_unlocker_ext() const;
257 bool is_unlocked_ext() const;
258 bool is_writeable_ext() const;
259 bool is_external_ext() const;
260
261 void get_locked_message(char*, int) const;
262 void get_locked_message_ext(char*, int) const;
263
264 void print_on(outputStream* st, bool withComments = false );
265 void print_as_flag(outputStream* st);
266 };
267
268 // debug flags control various aspects of the VM and are global accessible
269
270 // use FlagSetting to temporarily change some debug flag
271 // e.g. FlagSetting fs(DebugThisAndThat, true);
272 // restored to previous value upon leaving scope
273 class FlagSetting {
274 bool val;
275 bool* flag;
276 public:
277 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
278 ~FlagSetting() { *flag = val; }
279 };
280
281
282 class CounterSetting {
283 intx* counter;
284 public:
285 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
286 ~CounterSetting() { (*counter)--; }
287 };
288
289
290 class IntFlagSetting {
291 intx val;
292 intx* flag;
293 public:
294 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
295 ~IntFlagSetting() { *flag = val; }
296 };
297
298
299 class DoubleFlagSetting {
300 double val;
301 double* flag;
302 public:
303 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
304 ~DoubleFlagSetting() { *flag = val; }
305 };
306
307
308 class CommandLineFlags {
309 public:
310 static bool boolAt(char* name, size_t len, bool* value);
311 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
312 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
313 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
314
315 static bool intxAt(char* name, size_t len, intx* value);
316 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
317 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
318 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
319
320 static bool uintxAt(char* name, size_t len, uintx* value);
321 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
322 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
323 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
324
325 static bool uint64_tAt(char* name, size_t len, uint64_t* value);
326 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
327 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin);
328 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
329
330 static bool doubleAt(char* name, size_t len, double* value);
331 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
332 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
333 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
334
335 static bool ccstrAt(char* name, size_t len, ccstr* value);
336 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
337 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
338 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
339
340 // Returns false if name is not a command line flag.
341 static bool wasSetOnCmdline(const char* name, bool* value);
342 static void printSetFlags(outputStream* out);
343
344 static void printFlags(outputStream* out, bool withComments);
345
346 static void verify() PRODUCT_RETURN;
347 };
348
349 // use this for flags that are true by default in the debug version but
350 // false in the optimized version, and vice versa
351 #ifdef ASSERT
352 #define trueInDebug true
353 #define falseInDebug false
354 #else
355 #define trueInDebug false
356 #define falseInDebug true
357 #endif
358
359 // use this for flags that are true per default in the product build
360 // but false in development builds, and vice versa
361 #ifdef PRODUCT
362 #define trueInProduct true
363 #define falseInProduct false
364 #else
365 #define trueInProduct false
366 #define falseInProduct true
367 #endif
368
369 #ifdef JAVASE_EMBEDDED
370 #define falseInEmbedded false
371 #else
372 #define falseInEmbedded true
373 #endif
374
375 // develop flags are settable / visible only during development and are constant in the PRODUCT version
376 // product flags are always settable / visible
377 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
378
379 // A flag must be declared with one of the following types:
380 // bool, intx, uintx, ccstr.
381 // The type "ccstr" is an alias for "const char*" and is used
382 // only in this file, because the macrology requires single-token type names.
383
384 // Note: Diagnostic options not meant for VM tuning or for product modes.
385 // They are to be used for VM quality assurance or field diagnosis
386 // of VM bugs. They are hidden so that users will not be encouraged to
387 // try them as if they were VM ordinary execution options. However, they
388 // are available in the product version of the VM. Under instruction
389 // from support engineers, VM customers can turn them on to collect
390 // diagnostic information about VM problems. To use a VM diagnostic
391 // option, you must first specify +UnlockDiagnosticVMOptions.
392 // (This master switch also affects the behavior of -Xprintflags.)
393 //
394 // experimental flags are in support of features that are not
395 // part of the officially supported product, but are available
396 // for experimenting with. They could, for example, be performance
397 // features that may not have undergone full or rigorous QA, but which may
398 // help performance in some cases and released for experimentation
399 // by the community of users and developers. This flag also allows one to
400 // be able to build a fully supported product that nonetheless also
401 // ships with some unsupported, lightly tested, experimental features.
402 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
403 // UnlockExperimentalVMOptions flag, which allows the control and
404 // modification of the experimental flags.
405 //
406 // Nota bene: neither diagnostic nor experimental options should be used casually,
407 // and they are not supported on production loads, except under explicit
408 // direction from support engineers.
409 //
410 // manageable flags are writeable external product flags.
411 // They are dynamically writeable through the JDK management interface
412 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
413 // These flags are external exported interface (see CCC). The list of
414 // manageable flags can be queried programmatically through the management
415 // interface.
416 //
417 // A flag can be made as "manageable" only if
418 // - the flag is defined in a CCC as an external exported interface.
419 // - the VM implementation supports dynamic setting of the flag.
420 // This implies that the VM must *always* query the flag variable
421 // and not reuse state related to the flag state at any given time.
422 // - you want the flag to be queried programmatically by the customers.
423 //
424 // product_rw flags are writeable internal product flags.
425 // They are like "manageable" flags but for internal/private use.
426 // The list of product_rw flags are internal/private flags which
427 // may be changed/removed in a future release. It can be set
428 // through the management interface to get/set value
429 // when the name of flag is supplied.
430 //
431 // A flag can be made as "product_rw" only if
432 // - the VM implementation supports dynamic setting of the flag.
433 // This implies that the VM must *always* query the flag variable
434 // and not reuse state related to the flag state at any given time.
435 //
436 // Note that when there is a need to support develop flags to be writeable,
437 // it can be done in the same way as product_rw.
438
439 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
440 \
441 lp64_product(bool, UseCompressedOops, false, \
442 "Use 32-bit object references in 64-bit VM. " \
443 "lp64_product means flag is always constant in 32 bit VM") \
444 \
445 notproduct(bool, CheckCompressedOops, true, \
446 "generate checks in encoding/decoding code in debug VM") \
447 \
448 product_pd(uintx, HeapBaseMinAddress, \
449 "OS specific low limit for heap base address") \
450 \
451 diagnostic(bool, PrintCompressedOopsMode, false, \
452 "Print compressed oops base address and encoding mode") \
453 \
454 lp64_product(intx, ObjectAlignmentInBytes, 8, \
455 "Default object alignment in bytes, 8 is minimum") \
456 \
457 /* UseMembar is theoretically a temp flag used for memory barrier \
458 * removal testing. It was supposed to be removed before FCS but has \
459 * been re-added (see 6401008) */ \
460 product_pd(bool, UseMembar, \
461 "(Unstable) Issues membars on thread state transitions") \
462 \
463 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \
464 * that don't support it. This will be replaced by processor detection \
465 * logic. \
466 */ \
467 product(bool, UsePPCLWSYNC, true, \
468 "Use lwsync instruction if true, else use slower sync") \
469 \
470 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
471 "Whether to clean the chunk pool asynchronously") \
472 \
473 /* Temporary: See 6948537 */ \
474 experimental(bool, UseMemSetInBOT, true, \
475 "(Unstable) uses memset in BOT updates in GC code") \
476 \
477 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
478 "Enable normal processing of flags relating to field diagnostics")\
479 \
480 experimental(bool, UnlockExperimentalVMOptions, false, \
481 "Enable normal processing of flags relating to experimental features")\
482 \
483 product(bool, JavaMonitorsInStackTrace, true, \
484 "Print info. about Java monitor locks when the stacks are dumped")\
485 \
486 product_pd(bool, UseLargePages, \
487 "Use large page memory") \
488 \
489 product_pd(bool, UseLargePagesIndividualAllocation, \
490 "Allocate large pages individually for better affinity") \
491 \
492 develop(bool, LargePagesIndividualAllocationInjectError, false, \
493 "Fail large pages individual allocation") \
494 \
495 develop(bool, TracePageSizes, false, \
496 "Trace page size selection and usage.") \
497 \
498 product(bool, UseNUMA, false, \
499 "Use NUMA if available") \
500 \
501 product(bool, UseNUMAInterleaving, false, \
502 "Interleave memory across NUMA nodes if available") \
503 \
504 product(uintx, NUMAInterleaveGranularity, 2*M, \
505 "Granularity to use for NUMA interleaving on Windows OS") \
506 \
507 product(bool, ForceNUMA, false, \
508 "Force NUMA optimizations on single-node/UMA systems") \
509 \
510 product(intx, NUMAChunkResizeWeight, 20, \
511 "Percentage (0-100) used to weight the current sample when " \
512 "computing exponentially decaying average for " \
513 "AdaptiveNUMAChunkSizing") \
514 \
515 product(intx, NUMASpaceResizeRate, 1*G, \
516 "Do not reallocate more that this amount per collection") \
517 \
518 product(bool, UseAdaptiveNUMAChunkSizing, true, \
519 "Enable adaptive chunk sizing for NUMA") \
520 \
521 product(bool, NUMAStats, false, \
522 "Print NUMA stats in detailed heap information") \
523 \
524 product(intx, NUMAPageScanRate, 256, \
525 "Maximum number of pages to include in the page scan procedure") \
526 \
527 product_pd(bool, NeedsDeoptSuspend, \
528 "True for register window machines (sparc/ia64)") \
529 \
530 product(intx, UseSSE, 99, \
531 "Highest supported SSE instructions set on x86/x64") \
532 \
533 product(bool, UseAES, false, \
534 "Control whether AES instructions can be used on x86/x64") \
535 \
536 product(uintx, LargePageSizeInBytes, 0, \
537 "Large page size (0 to let VM choose the page size") \
538 \
539 product(uintx, LargePageHeapSizeThreshold, 128*M, \
540 "Use large pages if max heap is at least this big") \
541 \
542 product(bool, ForceTimeHighResolution, false, \
543 "Using high time resolution(For Win32 only)") \
544 \
545 develop(bool, TraceItables, false, \
546 "Trace initialization and use of itables") \
547 \
548 develop(bool, TracePcPatching, false, \
549 "Trace usage of frame::patch_pc") \
550 \
551 develop(bool, TraceJumps, false, \
552 "Trace assembly jumps in thread ring buffer") \
553 \
554 develop(bool, TraceRelocator, false, \
555 "Trace the bytecode relocator") \
556 \
557 develop(bool, TraceLongCompiles, false, \
558 "Print out every time compilation is longer than " \
559 "a given threashold") \
560 \
561 develop(bool, SafepointALot, false, \
562 "Generates a lot of safepoints. Works with " \
563 "GuaranteedSafepointInterval") \
564 \
565 product_pd(bool, BackgroundCompilation, \
566 "A thread requesting compilation is not blocked during " \
567 "compilation") \
568 \
569 product(bool, PrintVMQWaitTime, false, \
570 "Prints out the waiting time in VM operation queue") \
571 \
572 develop(bool, NoYieldsInMicrolock, false, \
573 "Disable yields in microlock") \
574 \
575 develop(bool, TraceOopMapGeneration, false, \
576 "Shows oopmap generation") \
577 \
578 product(bool, MethodFlushing, true, \
579 "Reclamation of zombie and not-entrant methods") \
580 \
581 develop(bool, VerifyStack, false, \
582 "Verify stack of each thread when it is entering a runtime call") \
583 \
584 diagnostic(bool, ForceUnreachable, false, \
585 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \
586 \
587 notproduct(bool, StressDerivedPointers, false, \
588 "Force scavenge when a derived pointers is detected on stack " \
589 "after rtm call") \
590 \
591 develop(bool, TraceDerivedPointers, false, \
592 "Trace traversal of derived pointers on stack") \
593 \
594 notproduct(bool, TraceCodeBlobStacks, false, \
595 "Trace stack-walk of codeblobs") \
596 \
597 product(bool, PrintJNIResolving, false, \
598 "Used to implement -v:jni") \
599 \
600 notproduct(bool, PrintRewrites, false, \
601 "Print methods that are being rewritten") \
602 \
603 product(bool, UseInlineCaches, true, \
604 "Use Inline Caches for virtual calls ") \
605 \
606 develop(bool, InlineArrayCopy, true, \
607 "inline arraycopy native that is known to be part of " \
608 "base library DLL") \
609 \
610 develop(bool, InlineObjectHash, true, \
611 "inline Object::hashCode() native that is known to be part " \
612 "of base library DLL") \
613 \
614 develop(bool, InlineNatives, true, \
615 "inline natives that are known to be part of base library DLL") \
616 \
617 develop(bool, InlineMathNatives, true, \
618 "inline SinD, CosD, etc.") \
619 \
620 develop(bool, InlineClassNatives, true, \
621 "inline Class.isInstance, etc") \
622 \
623 develop(bool, InlineThreadNatives, true, \
624 "inline Thread.currentThread, etc") \
625 \
626 develop(bool, InlineUnsafeOps, true, \
627 "inline memory ops (native methods) from sun.misc.Unsafe") \
628 \
629 product(bool, CriticalJNINatives, true, \
630 "check for critical JNI entry points") \
631 \
632 notproduct(bool, StressCriticalJNINatives, false, \
633 "Exercise register saving code in critical natives") \
634 \
635 product(bool, UseSSE42Intrinsics, false, \
636 "SSE4.2 versions of intrinsics") \
637 \
638 product(bool, UseAESIntrinsics, false, \
639 "use intrinsics for AES versions of crypto") \
640 \
641 develop(bool, TraceCallFixup, false, \
642 "traces all call fixups") \
643 \
644 develop(bool, DeoptimizeALot, false, \
645 "deoptimize at every exit from the runtime system") \
646 \
647 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
648 "a comma separated list of bcis to deoptimize at") \
649 \
650 product(bool, DeoptimizeRandom, false, \
651 "deoptimize random frames on random exit from the runtime system")\
652 \
653 notproduct(bool, ZombieALot, false, \
654 "creates zombies (non-entrant) at exit from the runt. system") \
655 \
656 product(bool, UnlinkSymbolsALot, false, \
657 "unlink unreferenced symbols from the symbol table at safepoints")\
658 \
659 notproduct(bool, WalkStackALot, false, \
660 "trace stack (no print) at every exit from the runtime system") \
661 \
662 product(bool, Debugging, false, \
663 "set when executing debug methods in debug.ccp " \
664 "(to prevent triggering assertions)") \
665 \
666 notproduct(bool, StrictSafepointChecks, trueInDebug, \
667 "Enable strict checks that safepoints cannot happen for threads " \
668 "that used No_Safepoint_Verifier") \
669 \
670 notproduct(bool, VerifyLastFrame, false, \
671 "Verify oops on last frame on entry to VM") \
672 \
673 develop(bool, TraceHandleAllocation, false, \
674 "Prints out warnings when suspicious many handles are allocated") \
675 \
676 product(bool, UseCompilerSafepoints, true, \
677 "Stop at safepoints in compiled code") \
678 \
679 product(bool, UseSplitVerifier, true, \
680 "use split verifier with StackMapTable attributes") \
681 \
682 product(bool, FailOverToOldVerifier, true, \
683 "fail over to old verifier when split verifier fails") \
684 \
685 develop(bool, ShowSafepointMsgs, false, \
686 "Show msg. about safepoint synch.") \
687 \
688 product(bool, SafepointTimeout, false, \
689 "Time out and warn or fail after SafepointTimeoutDelay " \
690 "milliseconds if failed to reach safepoint") \
691 \
692 develop(bool, DieOnSafepointTimeout, false, \
693 "Die upon failure to reach safepoint (see SafepointTimeout)") \
694 \
695 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
696 /* typically, at most a few retries are needed */ \
697 product(intx, SuspendRetryCount, 50, \
698 "Maximum retry count for an external suspend request") \
699 \
700 product(intx, SuspendRetryDelay, 5, \
701 "Milliseconds to delay per retry (* current_retry_count)") \
702 \
703 product(bool, AssertOnSuspendWaitFailure, false, \
704 "Assert/Guarantee on external suspend wait failure") \
705 \
706 product(bool, TraceSuspendWaitFailures, false, \
707 "Trace external suspend wait failures") \
708 \
709 product(bool, MaxFDLimit, true, \
710 "Bump the number of file descriptors to max in solaris.") \
711 \
712 diagnostic(bool, LogEvents, true, \
713 "Enable the various ring buffer event logs") \
714 \
715 diagnostic(intx, LogEventsBufferEntries, 10, \
716 "Enable the various ring buffer event logs") \
717 \
718 product(bool, BytecodeVerificationRemote, true, \
719 "Enables the Java bytecode verifier for remote classes") \
720 \
721 product(bool, BytecodeVerificationLocal, false, \
722 "Enables the Java bytecode verifier for local classes") \
723 \
724 develop(bool, ForceFloatExceptions, trueInDebug, \
725 "Force exceptions on FP stack under/overflow") \
726 \
727 develop(bool, VerifyStackAtCalls, false, \
728 "Verify that the stack pointer is unchanged after calls") \
729 \
730 develop(bool, TraceJavaAssertions, false, \
731 "Trace java language assertions") \
732 \
733 notproduct(bool, CheckAssertionStatusDirectives, false, \
734 "temporary - see javaClasses.cpp") \
735 \
736 notproduct(bool, PrintMallocFree, false, \
737 "Trace calls to C heap malloc/free allocation") \
738 \
739 product(bool, PrintOopAddress, false, \
740 "Always print the location of the oop") \
741 \
742 notproduct(bool, VerifyCodeCacheOften, false, \
743 "Verify compiled-code cache often") \
744 \
745 develop(bool, ZapDeadCompiledLocals, false, \
746 "Zap dead locals in compiler frames") \
747 \
748 notproduct(bool, ZapDeadLocalsOld, false, \
749 "Zap dead locals (old version, zaps all frames when " \
750 "entering the VM") \
751 \
752 notproduct(bool, CheckOopishValues, false, \
753 "Warn if value contains oop ( requires ZapDeadLocals)") \
754 \
755 develop(bool, UseMallocOnly, false, \
756 "use only malloc/free for allocation (no resource area/arena)") \
757 \
758 develop(bool, PrintMalloc, false, \
759 "print all malloc/free calls") \
760 \
761 develop(bool, PrintMallocStatistics, false, \
762 "print malloc/free statistics") \
763 \
764 develop(bool, ZapResourceArea, trueInDebug, \
765 "Zap freed resource/arena space with 0xABABABAB") \
766 \
767 notproduct(bool, ZapVMHandleArea, trueInDebug, \
768 "Zap freed VM handle space with 0xBCBCBCBC") \
769 \
770 develop(bool, ZapJNIHandleArea, trueInDebug, \
771 "Zap freed JNI handle space with 0xFEFEFEFE") \
772 \
773 notproduct(bool, ZapStackSegments, trueInDebug, \
774 "Zap allocated/freed Stack segments with 0xFADFADED") \
775 \
776 develop(bool, ZapUnusedHeapArea, trueInDebug, \
777 "Zap unused heap space with 0xBAADBABE") \
778 \
779 develop(bool, TraceZapUnusedHeapArea, false, \
780 "Trace zapping of unused heap space") \
781 \
782 develop(bool, CheckZapUnusedHeapArea, false, \
783 "Check zapping of unused heap space") \
784 \
785 develop(bool, ZapFillerObjects, trueInDebug, \
786 "Zap filler objects with 0xDEAFBABE") \
787 \
788 develop(bool, PrintVMMessages, true, \
789 "Print vm messages on console") \
790 \
791 product(bool, PrintGCApplicationConcurrentTime, false, \
792 "Print the time the application has been running") \
793 \
794 product(bool, PrintGCApplicationStoppedTime, false, \
795 "Print the time the application has been stopped") \
796 \
797 diagnostic(bool, VerboseVerification, false, \
798 "Display detailed verification details") \
799 \
800 notproduct(uintx, ErrorHandlerTest, 0, \
801 "If > 0, provokes an error after VM initialization; the value" \
802 "determines which error to provoke. See test_error_handler()" \
803 "in debug.cpp.") \
804 \
805 develop(bool, Verbose, false, \
806 "Prints additional debugging information from other modes") \
807 \
808 develop(bool, PrintMiscellaneous, false, \
809 "Prints uncategorized debugging information (requires +Verbose)") \
810 \
811 develop(bool, WizardMode, false, \
812 "Prints much more debugging information") \
813 \
814 product(bool, ShowMessageBoxOnError, false, \
815 "Keep process alive on VM fatal error") \
816 \
817 product(bool, CreateMinidumpOnCrash, false, \
818 "Create minidump on VM fatal error") \
819 \
820 product_pd(bool, UseOSErrorReporting, \
821 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
822 \
823 product(bool, SuppressFatalErrorMessage, false, \
824 "Do NO Fatal Error report [Avoid deadlock]") \
825 \
826 product(ccstrlist, OnError, "", \
827 "Run user-defined commands on fatal error; see VMError.cpp " \
828 "for examples") \
829 \
830 product(ccstrlist, OnOutOfMemoryError, "", \
831 "Run user-defined commands on first java.lang.OutOfMemoryError") \
832 \
833 manageable(bool, HeapDumpBeforeFullGC, false, \
834 "Dump heap to file before any major stop-world GC") \
835 \
836 manageable(bool, HeapDumpAfterFullGC, false, \
837 "Dump heap to file after any major stop-world GC") \
838 \
839 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
840 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
841 \
842 manageable(ccstr, HeapDumpPath, NULL, \
843 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
844 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
845 "in the working directory)") \
846 \
847 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
848 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
849 "when the heap usage is larger than this") \
850 \
851 develop(uintx, HeapDumpSegmentSize, 1*G, \
852 "Approximate segment size when generating a segmented heap dump") \
853 \
854 develop(bool, BreakAtWarning, false, \
855 "Execute breakpoint upon encountering VM warning") \
856 \
857 product_pd(bool, UseVectoredExceptions, \
858 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
859 \
860 develop(bool, TraceVMOperation, false, \
861 "Trace vm operations") \
862 \
863 develop(bool, UseFakeTimers, false, \
864 "Tells whether the VM should use system time or a fake timer") \
865 \
866 product(ccstr, NativeMemoryTracking, "off", \
867 "Native memory tracking options") \
868 \
869 diagnostic(bool, PrintNMTStatistics, false, \
870 "Print native memory tracking summary data if it is on") \
871 \
872 diagnostic(bool, AutoShutdownNMT, true, \
873 "Automatically shutdown native memory tracking under stress " \
874 "situation. When set to false, native memory tracking tries to " \
875 "stay alive at the expense of JVM performance") \
876 \
877 diagnostic(bool, LogCompilation, false, \
878 "Log compilation activity in detail to hotspot.log or LogFile") \
879 \
880 product(bool, PrintCompilation, false, \
881 "Print compilations") \
882 \
883 diagnostic(bool, TraceNMethodInstalls, false, \
884 "Trace nmethod intallation") \
885 \
886 diagnostic(intx, ScavengeRootsInCode, 2, \
887 "0: do not allow scavengable oops in the code cache; " \
888 "1: allow scavenging from the code cache; " \
889 "2: emit as many constants as the compiler can see") \
890 \
891 product(bool, AlwaysRestoreFPU, false, \
892 "Restore the FPU control word after every JNI call (expensive)") \
893 \
894 diagnostic(bool, PrintCompilation2, false, \
895 "Print additional statistics per compilation") \
896 \
897 diagnostic(bool, PrintAdapterHandlers, false, \
898 "Print code generated for i2c/c2i adapters") \
899 \
900 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
901 "Verify that i2c/c2i adapters are called properly") \
902 \
903 develop(bool, VerifyAdapterSharing, false, \
904 "Verify that the code for shared adapters is the equivalent") \
905 \
906 diagnostic(bool, PrintAssembly, false, \
907 "Print assembly code (using external disassembler.so)") \
908 \
909 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
910 "Options string passed to disassembler.so") \
911 \
912 diagnostic(bool, PrintNMethods, false, \
913 "Print assembly code for nmethods when generated") \
914 \
915 diagnostic(bool, PrintNativeNMethods, false, \
916 "Print assembly code for native nmethods when generated") \
917 \
918 develop(bool, PrintDebugInfo, false, \
919 "Print debug information for all nmethods when generated") \
920 \
921 develop(bool, PrintRelocations, false, \
922 "Print relocation information for all nmethods when generated") \
923 \
924 develop(bool, PrintDependencies, false, \
925 "Print dependency information for all nmethods when generated") \
926 \
927 develop(bool, PrintExceptionHandlers, false, \
928 "Print exception handler tables for all nmethods when generated") \
929 \
930 develop(bool, StressCompiledExceptionHandlers, false, \
931 "Exercise compiled exception handlers") \
932 \
933 develop(bool, InterceptOSException, false, \
934 "Starts debugger when an implicit OS (e.g., NULL) " \
935 "exception happens") \
936 \
937 notproduct(bool, PrintCodeCache, false, \
938 "Print the compiled_code cache when exiting") \
939 \
940 develop(bool, PrintCodeCache2, false, \
941 "Print detailed info on the compiled_code cache when exiting") \
942 \
943 diagnostic(bool, PrintStubCode, false, \
944 "Print generated stub code") \
945 \
946 product(bool, StackTraceInThrowable, true, \
947 "Collect backtrace in throwable when exception happens") \
948 \
949 product(bool, OmitStackTraceInFastThrow, true, \
950 "Omit backtraces for some 'hot' exceptions in optimized code") \
951 \
952 product(bool, ProfilerPrintByteCodeStatistics, false, \
953 "Prints byte code statictics when dumping profiler output") \
954 \
955 product(bool, ProfilerRecordPC, false, \
956 "Collects tick for each 16 byte interval of compiled code") \
957 \
958 product(bool, ProfileVM, false, \
959 "Profiles ticks that fall within VM (either in the VM Thread " \
960 "or VM code called through stubs)") \
961 \
962 product(bool, ProfileIntervals, false, \
963 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
964 \
965 notproduct(bool, ProfilerCheckIntervals, false, \
966 "Collect and print info on spacing of profiler ticks") \
967 \
968 develop(bool, PrintJVMWarnings, false, \
969 "Prints warnings for unimplemented JVM functions") \
970 \
971 product(bool, PrintWarnings, true, \
972 "Prints JVM warnings to output stream") \
973 \
974 notproduct(uintx, WarnOnStalledSpinLock, 0, \
975 "Prints warnings for stalled SpinLocks") \
976 \
977 develop(bool, InitializeJavaLangSystem, true, \
978 "Initialize java.lang.System - turn off for individual " \
979 "method debugging") \
980 \
981 develop(bool, InitializeJavaLangString, true, \
982 "Initialize java.lang.String - turn off for individual " \
983 "method debugging") \
984 \
985 develop(bool, InitializeJavaLangExceptionsErrors, true, \
986 "Initialize various error and exception classes - turn off for " \
987 "individual method debugging") \
988 \
989 product(bool, RegisterFinalizersAtInit, true, \
990 "Register finalizable objects at end of Object.<init> or " \
991 "after allocation") \
992 \
993 develop(bool, RegisterReferences, true, \
994 "Tells whether the VM should register soft/weak/final/phantom " \
995 "references") \
996 \
997 develop(bool, IgnoreRewrites, false, \
998 "Supress rewrites of bytecodes in the oopmap generator. " \
999 "This is unsafe!") \
1000 \
1001 develop(bool, PrintCodeCacheExtension, false, \
1002 "Print extension of code cache") \
1003 \
1004 develop(bool, UsePrivilegedStack, true, \
1005 "Enable the security JVM functions") \
1006 \
1007 develop(bool, ProtectionDomainVerification, true, \
1008 "Verifies protection domain before resolution in system " \
1009 "dictionary") \
1010 \
1011 product(bool, ClassUnloading, true, \
1012 "Do unloading of classes") \
1013 \
1014 develop(bool, DisableStartThread, false, \
1015 "Disable starting of additional Java threads " \
1016 "(for debugging only)") \
1017 \
1018 develop(bool, MemProfiling, false, \
1019 "Write memory usage profiling to log file") \
1020 \
1021 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1022 "Prints the system dictionary at exit") \
1023 \
1024 experimental(intx, PredictedLoadedClassCount, 0, \
1025 "Experimental: Tune loaded class cache starting size.") \
1026 \
1027 diagnostic(bool, UnsyncloadClass, false, \
1028 "Unstable: VM calls loadClass unsynchronized. Custom " \
1029 "class loader must call VM synchronized for findClass " \
1030 "and defineClass.") \
1031 \
1032 product(bool, AlwaysLockClassLoader, false, \
1033 "Require the VM to acquire the class loader lock before calling " \
1034 "loadClass() even for class loaders registering " \
1035 "as parallel capable") \
1036 \
1037 product(bool, AllowParallelDefineClass, false, \
1038 "Allow parallel defineClass requests for class loaders " \
1039 "registering as parallel capable") \
1040 \
1041 product(bool, MustCallLoadClassInternal, false, \
1042 "Call loadClassInternal() rather than loadClass()") \
1043 \
1044 product_pd(bool, DontYieldALot, \
1045 "Throw away obvious excess yield calls (for SOLARIS only)") \
1046 \
1047 product_pd(bool, ConvertSleepToYield, \
1048 "Converts sleep(0) to thread yield " \
1049 "(may be off for SOLARIS to improve GUI)") \
1050 \
1051 product(bool, ConvertYieldToSleep, false, \
1052 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
1053 "behavior (SOLARIS only)") \
1054 \
1055 product(bool, UseBoundThreads, true, \
1056 "Bind user level threads to kernel threads (for SOLARIS only)") \
1057 \
1058 develop(bool, UseDetachedThreads, true, \
1059 "Use detached threads that are recycled upon termination " \
1060 "(for SOLARIS only)") \
1061 \
1062 product(bool, UseLWPSynchronization, true, \
1063 "Use LWP-based instead of libthread-based synchronization " \
1064 "(SPARC only)") \
1065 \
1066 product(ccstr, SyncKnobs, NULL, \
1067 "(Unstable) Various monitor synchronization tunables") \
1068 \
1069 product(intx, EmitSync, 0, \
1070 "(Unsafe,Unstable) " \
1071 " Controls emission of inline sync fast-path code") \
1072 \
1073 product(intx, MonitorBound, 0, "Bound Monitor population") \
1074 \
1075 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1076 \
1077 product(intx, Atomics, 0, \
1078 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \
1079 \
1080 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
1081 \
1082 product(intx, SyncVerbose, 0, "(Unstable)" ) \
1083 \
1084 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
1085 \
1086 product(intx, hashCode, 0, \
1087 "(Unstable) select hashCode generation algorithm" ) \
1088 \
1089 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1090 "(Unstable, Linux-specific)" \
1091 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
1092 \
1093 product(bool, FilterSpuriousWakeups, true, \
1094 "Prevent spurious or premature wakeups from object.wait " \
1095 "(Solaris only)") \
1096 \
1097 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
1098 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
1099 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
1100 \
1101 develop(bool, UsePthreads, false, \
1102 "Use pthread-based instead of libthread-based synchronization " \
1103 "(SPARC only)") \
1104 \
1105 product(bool, AdjustConcurrency, false, \
1106 "call thr_setconcurrency at thread create time to avoid " \
1107 "LWP starvation on MP systems (For Solaris Only)") \
1108 \
1109 product(bool, ReduceSignalUsage, false, \
1110 "Reduce the use of OS signals in Java and/or the VM") \
1111 \
1112 notproduct(bool, ValidateMarkSweep, false, \
1113 "Do extra validation during MarkSweep collection") \
1114 \
1115 notproduct(bool, RecordMarkSweepCompaction, false, \
1116 "Enable GC-to-GC recording and querying of compaction during " \
1117 "MarkSweep") \
1118 \
1119 develop_pd(bool, ShareVtableStubs, \
1120 "Share vtable stubs (smaller code but worse branch prediction") \
1121 \
1122 develop(bool, LoadLineNumberTables, true, \
1123 "Tells whether the class file parser loads line number tables") \
1124 \
1125 develop(bool, LoadLocalVariableTables, true, \
1126 "Tells whether the class file parser loads local variable tables")\
1127 \
1128 develop(bool, LoadLocalVariableTypeTables, true, \
1129 "Tells whether the class file parser loads local variable type tables")\
1130 \
1131 product(bool, AllowUserSignalHandlers, false, \
1132 "Do not complain if the application installs signal handlers " \
1133 "(Solaris & Linux only)") \
1134 \
1135 product(bool, UseSignalChaining, true, \
1136 "Use signal-chaining to invoke signal handlers installed " \
1137 "by the application (Solaris & Linux only)") \
1138 \
1139 product(bool, UseAltSigs, false, \
1140 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1141 "internal signals (Solaris only)") \
1142 \
1143 product(bool, AllowJNIEnvProxy, false, \
1144 "Allow JNIEnv proxies for jdbx") \
1145 \
1146 product(bool, JNIDetachReleasesMonitors, true, \
1147 "JNI DetachCurrentThread releases monitors owned by thread") \
1148 \
1149 product(bool, RestoreMXCSROnJNICalls, false, \
1150 "Restore MXCSR when returning from JNI calls") \
1151 \
1152 product(bool, CheckJNICalls, false, \
1153 "Verify all arguments to JNI calls") \
1154 \
1155 product(bool, UseFastJNIAccessors, true, \
1156 "Use optimized versions of Get<Primitive>Field") \
1157 \
1158 product(bool, EagerXrunInit, false, \
1159 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1160 " but not all -Xrun libraries may support the state of the VM at this time") \
1161 \
1162 product(bool, PreserveAllAnnotations, false, \
1163 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
1164 \
1165 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1166 "Number of OutOfMemoryErrors preallocated with backtrace") \
1167 \
1168 product(bool, LazyBootClassLoader, true, \
1169 "Enable/disable lazy opening of boot class path entries") \
1170 \
1171 product(bool, UseXMMForArrayCopy, false, \
1172 "Use SSE2 MOVQ instruction for Arraycopy") \
1173 \
1174 product(intx, FieldsAllocationStyle, 1, \
1175 "0 - type based with oops first, 1 - with oops last, " \
1176 "2 - oops in super and sub classes are together") \
1177 \
1178 product(bool, CompactFields, true, \
1179 "Allocate nonstatic fields in gaps between previous fields") \
1180 \
1181 notproduct(bool, PrintCompactFieldsSavings, false, \
1182 "Print how many words were saved with CompactFields") \
1183 \
1184 product(bool, UseBiasedLocking, true, \
1185 "Enable biased locking in JVM") \
1186 \
1187 product(intx, BiasedLockingStartupDelay, 4000, \
1188 "Number of milliseconds to wait before enabling biased locking") \
1189 \
1190 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1191 "Print statistics of biased locking in JVM") \
1192 \
1193 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1194 "Threshold of number of revocations per type to try to " \
1195 "rebias all objects in the heap of that type") \
1196 \
1197 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1198 "Threshold of number of revocations per type to permanently " \
1199 "revoke biases of all objects in the heap of that type") \
1200 \
1201 product(intx, BiasedLockingDecayTime, 25000, \
1202 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1203 "type after previous bulk rebias") \
1204 \
1205 develop(bool, JavaObjectsInPerm, false, \
1206 "controls whether Classes and interned Strings are allocated" \
1207 "in perm. This purely intended to allow debugging issues" \
1208 "in production.") \
1209 \
1210 /* tracing */ \
1211 \
1212 notproduct(bool, TraceRuntimeCalls, false, \
1213 "Trace run-time calls") \
1214 \
1215 develop(bool, TraceJNICalls, false, \
1216 "Trace JNI calls") \
1217 \
1218 notproduct(bool, TraceJVMCalls, false, \
1219 "Trace JVM calls") \
1220 \
1221 product(ccstr, TraceJVMTI, NULL, \
1222 "Trace flags for JVMTI functions and events") \
1223 \
1224 /* This option can change an EMCP method into an obsolete method. */ \
1225 /* This can affect tests that except specific methods to be EMCP. */ \
1226 /* This option should be used with caution. */ \
1227 product(bool, StressLdcRewrite, false, \
1228 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1229 \
1230 product(intx, TraceRedefineClasses, 0, \
1231 "Trace level for JVMTI RedefineClasses") \
1232 \
1233 develop(bool, StressMethodComparator, false, \
1234 "run the MethodComparator on all loaded methods") \
1235 \
1236 /* change to false by default sometime after Mustang */ \
1237 product(bool, VerifyMergedCPBytecodes, true, \
1238 "Verify bytecodes after RedefineClasses constant pool merging") \
1239 \
1240 develop(bool, TraceJNIHandleAllocation, false, \
1241 "Trace allocation/deallocation of JNI handle blocks") \
1242 \
1243 develop(bool, TraceThreadEvents, false, \
1244 "Trace all thread events") \
1245 \
1246 develop(bool, TraceBytecodes, false, \
1247 "Trace bytecode execution") \
1248 \
1249 develop(bool, TraceClassInitialization, false, \
1250 "Trace class initialization") \
1251 \
1252 develop(bool, TraceExceptions, false, \
1253 "Trace exceptions") \
1254 \
1255 develop(bool, TraceICs, false, \
1256 "Trace inline cache changes") \
1257 \
1258 notproduct(bool, TraceInvocationCounterOverflow, false, \
1259 "Trace method invocation counter overflow") \
1260 \
1261 develop(bool, TraceInlineCacheClearing, false, \
1262 "Trace clearing of inline caches in nmethods") \
1263 \
1264 develop(bool, TraceDependencies, false, \
1265 "Trace dependencies") \
1266 \
1267 develop(bool, VerifyDependencies, trueInDebug, \
1268 "Exercise and verify the compilation dependency mechanism") \
1269 \
1270 develop(bool, TraceNewOopMapGeneration, false, \
1271 "Trace OopMapGeneration") \
1272 \
1273 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1274 "Trace OopMapGeneration: print detailed cell states") \
1275 \
1276 develop(bool, TimeOopMap, false, \
1277 "Time calls to GenerateOopMap::compute_map() in sum") \
1278 \
1279 develop(bool, TimeOopMap2, false, \
1280 "Time calls to GenerateOopMap::compute_map() individually") \
1281 \
1282 develop(bool, TraceMonitorMismatch, false, \
1283 "Trace monitor matching failures during OopMapGeneration") \
1284 \
1285 develop(bool, TraceOopMapRewrites, false, \
1286 "Trace rewritting of method oops during oop map generation") \
1287 \
1288 develop(bool, TraceSafepoint, false, \
1289 "Trace safepoint operations") \
1290 \
1291 develop(bool, TraceICBuffer, false, \
1292 "Trace usage of IC buffer") \
1293 \
1294 develop(bool, TraceCompiledIC, false, \
1295 "Trace changes of compiled IC") \
1296 \
1297 notproduct(bool, TraceZapDeadLocals, false, \
1298 "Trace zapping dead locals") \
1299 \
1300 develop(bool, TraceStartupTime, false, \
1301 "Trace setup time") \
1302 \
1303 develop(bool, TraceProtectionDomainVerification, false, \
1304 "Trace protection domain verifcation") \
1305 \
1306 develop(bool, TraceClearedExceptions, false, \
1307 "Prints when an exception is forcibly cleared") \
1308 \
1309 product(bool, TraceClassResolution, false, \
1310 "Trace all constant pool resolutions (for debugging)") \
1311 \
1312 product(bool, TraceBiasedLocking, false, \
1313 "Trace biased locking in JVM") \
1314 \
1315 product(bool, TraceMonitorInflation, false, \
1316 "Trace monitor inflation in JVM") \
1317 \
1318 /* gc */ \
1319 \
1320 product(bool, UseSerialGC, false, \
1321 "Use the serial garbage collector") \
1322 \
1323 product(bool, UseG1GC, false, \
1324 "Use the Garbage-First garbage collector") \
1325 \
1326 product(bool, UseParallelGC, false, \
1327 "Use the Parallel Scavenge garbage collector") \
1328 \
1329 product(bool, UseParallelOldGC, false, \
1330 "Use the Parallel Old garbage collector") \
1331 \
1332 product(uintx, HeapMaximumCompactionInterval, 20, \
1333 "How often should we maximally compact the heap (not allowing " \
1334 "any dead space)") \
1335 \
1336 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1337 "The collection count for the first maximum compaction") \
1338 \
1339 product(bool, UseMaximumCompactionOnSystemGC, true, \
1340 "In the Parallel Old garbage collector maximum compaction for " \
1341 "a system GC") \
1342 \
1343 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1344 "The mean used by the par compact dead wood" \
1345 "limiter (a number between 0-100).") \
1346 \
1347 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1348 "The standard deviation used by the par compact dead wood" \
1349 "limiter (a number between 0-100).") \
1350 \
1351 product(uintx, ParallelGCThreads, 0, \
1352 "Number of parallel threads parallel gc will use") \
1353 \
1354 product(bool, UseDynamicNumberOfGCThreads, false, \
1355 "Dynamically choose the number of parallel threads " \
1356 "parallel gc will use") \
1357 \
1358 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1359 "Force dynamic selection of the number of" \
1360 "parallel threads parallel gc will use to aid debugging") \
1361 \
1362 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1363 "Size of heap (bytes) per GC thread used in calculating the " \
1364 "number of GC threads") \
1365 \
1366 product(bool, TraceDynamicGCThreads, false, \
1367 "Trace the dynamic GC thread usage") \
1368 \
1369 develop(bool, ParallelOldGCSplitALot, false, \
1370 "Provoke splitting (copying data from a young gen space to" \
1371 "multiple destination spaces)") \
1372 \
1373 develop(uintx, ParallelOldGCSplitInterval, 3, \
1374 "How often to provoke splitting a young gen space") \
1375 \
1376 product(uintx, ConcGCThreads, 0, \
1377 "Number of threads concurrent gc will use") \
1378 \
1379 product(uintx, YoungPLABSize, 4096, \
1380 "Size of young gen promotion labs (in HeapWords)") \
1381 \
1382 product(uintx, OldPLABSize, 1024, \
1383 "Size of old gen promotion labs (in HeapWords)") \
1384 \
1385 product(uintx, GCTaskTimeStampEntries, 200, \
1386 "Number of time stamp entries per gc worker thread") \
1387 \
1388 product(bool, AlwaysTenure, false, \
1389 "Always tenure objects in eden. (ParallelGC only)") \
1390 \
1391 product(bool, NeverTenure, false, \
1392 "Never tenure objects in eden, May tenure on overflow " \
1393 "(ParallelGC only)") \
1394 \
1395 product(bool, ScavengeBeforeFullGC, true, \
1396 "Scavenge youngest generation before each full GC, " \
1397 "used with UseParallelGC") \
1398 \
1399 develop(bool, ScavengeWithObjectsInToSpace, false, \
1400 "Allow scavenges to occur when to_space contains objects.") \
1401 \
1402 product(bool, UseConcMarkSweepGC, false, \
1403 "Use Concurrent Mark-Sweep GC in the old generation") \
1404 \
1405 product(bool, ExplicitGCInvokesConcurrent, false, \
1406 "A System.gc() request invokes a concurrent collection;" \
1407 " (effective only when UseConcMarkSweepGC)") \
1408 \
1409 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1410 "A System.gc() request invokes a concurrent collection and " \
1411 "also unloads classes during such a concurrent gc cycle " \
1412 "(effective only when UseConcMarkSweepGC)") \
1413 \
1414 product(bool, GCLockerInvokesConcurrent, false, \
1415 "The exit of a JNI CS necessitating a scavenge also" \
1416 " kicks off a bkgrd concurrent collection") \
1417 \
1418 product(uintx, GCLockerEdenExpansionPercent, 5, \
1419 "How much the GC can expand the eden by while the GC locker " \
1420 "is active (as a percentage)") \
1421 \
1422 develop(bool, UseCMSAdaptiveFreeLists, true, \
1423 "Use Adaptive Free Lists in the CMS generation") \
1424 \
1425 develop(bool, UseAsyncConcMarkSweepGC, true, \
1426 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1427 \
1428 develop(bool, RotateCMSCollectionTypes, false, \
1429 "Rotate the CMS collections among concurrent and STW") \
1430 \
1431 product(bool, UseCMSBestFit, true, \
1432 "Use CMS best fit allocation strategy") \
1433 \
1434 product(bool, UseCMSCollectionPassing, true, \
1435 "Use passing of collection from background to foreground") \
1436 \
1437 product(bool, UseParNewGC, false, \
1438 "Use parallel threads in the new generation.") \
1439 \
1440 product(bool, ParallelGCVerbose, false, \
1441 "Verbose output for parallel GC.") \
1442 \
1443 product(intx, ParallelGCBufferWastePct, 10, \
1444 "wasted fraction of parallel allocation buffer.") \
1445 \
1446 diagnostic(bool, ParallelGCRetainPLAB, false, \
1447 "Retain parallel allocation buffers across scavenges; " \
1448 " -- disabled because this currently conflicts with " \
1449 " parallel card scanning under certain conditions ") \
1450 \
1451 product(intx, TargetPLABWastePct, 10, \
1452 "target wasted space in last buffer as pct of overall allocation")\
1453 \
1454 product(uintx, PLABWeight, 75, \
1455 "Percentage (0-100) used to weight the current sample when" \
1456 "computing exponentially decaying average for ResizePLAB.") \
1457 \
1458 product(bool, ResizePLAB, true, \
1459 "Dynamically resize (survivor space) promotion labs") \
1460 \
1461 product(bool, PrintPLAB, false, \
1462 "Print (survivor space) promotion labs sizing decisions") \
1463 \
1464 product(intx, ParGCArrayScanChunk, 50, \
1465 "Scan a subset and push remainder, if array is bigger than this") \
1466 \
1467 product(bool, ParGCUseLocalOverflow, false, \
1468 "Instead of a global overflow list, use local overflow stacks") \
1469 \
1470 product(bool, ParGCTrimOverflow, true, \
1471 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \
1472 \
1473 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1474 "Whether we should simulate work queue overflow in ParNew") \
1475 \
1476 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1477 "An `interval' counter that determines how frequently " \
1478 "we simulate overflow; a smaller number increases frequency") \
1479 \
1480 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1481 "The desired number of objects to claim from the overflow list") \
1482 \
1483 diagnostic(uintx, ParGCStridesPerThread, 2, \
1484 "The number of strides per worker thread that we divide up the " \
1485 "card table scanning work into") \
1486 \
1487 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1488 "The number of cards in each chunk of the parallel chunks used " \
1489 "during card table scanning") \
1490 \
1491 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1492 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1493 "parallel GC.") \
1494 \
1495 product(uintx, OldPLABWeight, 50, \
1496 "Percentage (0-100) used to weight the current sample when" \
1497 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \
1498 \
1499 product(bool, ResizeOldPLAB, true, \
1500 "Dynamically resize (old gen) promotion labs") \
1501 \
1502 product(bool, PrintOldPLAB, false, \
1503 "Print (old gen) promotion labs sizing decisions") \
1504 \
1505 product(uintx, CMSOldPLABMin, 16, \
1506 "Min size of CMS gen promotion lab caches per worker per blksize")\
1507 \
1508 product(uintx, CMSOldPLABMax, 1024, \
1509 "Max size of CMS gen promotion lab caches per worker per blksize")\
1510 \
1511 product(uintx, CMSOldPLABNumRefills, 4, \
1512 "Nominal number of refills of CMS gen promotion lab cache" \
1513 " per worker per block size") \
1514 \
1515 product(bool, CMSOldPLABResizeQuicker, false, \
1516 "Whether to react on-the-fly during a scavenge to a sudden" \
1517 " change in block demand rate") \
1518 \
1519 product(uintx, CMSOldPLABToleranceFactor, 4, \
1520 "The tolerance of the phase-change detector for on-the-fly" \
1521 " PLAB resizing during a scavenge") \
1522 \
1523 product(uintx, CMSOldPLABReactivityFactor, 2, \
1524 "The gain in the feedback loop for on-the-fly PLAB resizing" \
1525 " during a scavenge") \
1526 \
1527 product(bool, AlwaysPreTouch, false, \
1528 "It forces all freshly committed pages to be pre-touched.") \
1529 \
1530 product_pd(intx, CMSYoungGenPerWorker, \
1531 "The maximum size of young gen chosen by default per GC worker " \
1532 "thread available") \
1533 \
1534 product(bool, CMSIncrementalMode, false, \
1535 "Whether CMS GC should operate in \"incremental\" mode") \
1536 \
1537 product(uintx, CMSIncrementalDutyCycle, 10, \
1538 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1539 "CMSIncrementalPacing is enabled, then this is just the initial" \
1540 "value") \
1541 \
1542 product(bool, CMSIncrementalPacing, true, \
1543 "Whether the CMS incremental mode duty cycle should be " \
1544 "automatically adjusted") \
1545 \
1546 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1547 "Lower bound on the duty cycle when CMSIncrementalPacing is " \
1548 "enabled (a percentage, 0-100)") \
1549 \
1550 product(uintx, CMSIncrementalSafetyFactor, 10, \
1551 "Percentage (0-100) used to add conservatism when computing the " \
1552 "duty cycle") \
1553 \
1554 product(uintx, CMSIncrementalOffset, 0, \
1555 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1556 " is shifted to the right within the period between young GCs") \
1557 \
1558 product(uintx, CMSExpAvgFactor, 50, \
1559 "Percentage (0-100) used to weight the current sample when" \
1560 "computing exponential averages for CMS statistics.") \
1561 \
1562 product(uintx, CMS_FLSWeight, 75, \
1563 "Percentage (0-100) used to weight the current sample when" \
1564 "computing exponentially decating averages for CMS FLS statistics.") \
1565 \
1566 product(uintx, CMS_FLSPadding, 1, \
1567 "The multiple of deviation from mean to use for buffering" \
1568 "against volatility in free list demand.") \
1569 \
1570 product(uintx, FLSCoalescePolicy, 2, \
1571 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1572 \
1573 product(bool, FLSAlwaysCoalesceLarge, false, \
1574 "CMS: Larger free blocks are always available for coalescing") \
1575 \
1576 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1577 "CMS: the smaller the percentage the greater the coalition force")\
1578 \
1579 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1580 "CMS: the factor by which to inflate estimated demand of small" \
1581 " block sizes to prevent coalescing with an adjoining block") \
1582 \
1583 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1584 "CMS: the factor by which to inflate estimated demand of large" \
1585 " block sizes to prevent coalescing with an adjoining block") \
1586 \
1587 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1588 "CMS: the factor by which to inflate estimated demand of small" \
1589 " block sizes to prevent splitting to supply demand for smaller" \
1590 " blocks") \
1591 \
1592 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1593 "CMS: the factor by which to inflate estimated demand of large" \
1594 " block sizes to prevent splitting to supply demand for smaller" \
1595 " blocks") \
1596 \
1597 product(bool, CMSExtrapolateSweep, false, \
1598 "CMS: cushion for block demand during sweep") \
1599 \
1600 product(uintx, CMS_SweepWeight, 75, \
1601 "Percentage (0-100) used to weight the current sample when " \
1602 "computing exponentially decaying average for inter-sweep " \
1603 "duration") \
1604 \
1605 product(uintx, CMS_SweepPadding, 1, \
1606 "The multiple of deviation from mean to use for buffering " \
1607 "against volatility in inter-sweep duration.") \
1608 \
1609 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1610 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1611 "duration exceeds this threhold in milliseconds") \
1612 \
1613 develop(bool, CMSTraceIncrementalMode, false, \
1614 "Trace CMS incremental mode") \
1615 \
1616 develop(bool, CMSTraceIncrementalPacing, false, \
1617 "Trace CMS incremental mode pacing computation") \
1618 \
1619 develop(bool, CMSTraceThreadState, false, \
1620 "Trace the CMS thread state (enable the trace_state() method)") \
1621 \
1622 product(bool, CMSClassUnloadingEnabled, false, \
1623 "Whether class unloading enabled when using CMS GC") \
1624 \
1625 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1626 "When CMS class unloading is enabled, the maximum CMS cycle count"\
1627 " for which classes may not be unloaded") \
1628 \
1629 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1630 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1631 \
1632 product(bool, UseCMSCompactAtFullCollection, true, \
1633 "Use mark sweep compact at full collections") \
1634 \
1635 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1636 "Number of CMS full collection done before compaction if > 0") \
1637 \
1638 develop(intx, CMSDictionaryChoice, 0, \
1639 "Use BinaryTreeDictionary as default in the CMS generation") \
1640 \
1641 product(uintx, CMSIndexedFreeListReplenish, 4, \
1642 "Replenish an indexed free list with this number of chunks") \
1643 \
1644 product(bool, CMSReplenishIntermediate, true, \
1645 "Replenish all intermediate free-list caches") \
1646 \
1647 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1648 "When satisfying batched demand, split blocks from the " \
1649 "IndexedFreeList whose size is a multiple of requested size") \
1650 \
1651 product(bool, CMSLoopWarn, false, \
1652 "Warn in case of excessive CMS looping") \
1653 \
1654 develop(bool, CMSOverflowEarlyRestoration, false, \
1655 "Whether preserved marks should be restored early") \
1656 \
1657 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1658 "Size of marking stack") \
1659 \
1660 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1661 "Max size of marking stack") \
1662 \
1663 notproduct(bool, CMSMarkStackOverflowALot, false, \
1664 "Whether we should simulate frequent marking stack / work queue" \
1665 " overflow") \
1666 \
1667 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1668 "An `interval' counter that determines how frequently" \
1669 " we simulate overflow; a smaller number increases frequency") \
1670 \
1671 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1672 "(Temporary, subject to experimentation)" \
1673 "Maximum number of abortable preclean iterations, if > 0") \
1674 \
1675 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1676 "(Temporary, subject to experimentation)" \
1677 "Maximum time in abortable preclean in ms") \
1678 \
1679 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1680 "(Temporary, subject to experimentation)" \
1681 "Nominal minimum work per abortable preclean iteration") \
1682 \
1683 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1684 "(Temporary, subject to experimentation)" \
1685 " Time that we sleep between iterations when not given" \
1686 " enough work per iteration") \
1687 \
1688 product(uintx, CMSRescanMultiple, 32, \
1689 "Size (in cards) of CMS parallel rescan task") \
1690 \
1691 product(uintx, CMSConcMarkMultiple, 32, \
1692 "Size (in cards) of CMS concurrent MT marking task") \
1693 \
1694 product(uintx, CMSRevisitStackSize, 1*M, \
1695 "Size of CMS KlassKlass revisit stack") \
1696 \
1697 product(bool, CMSAbortSemantics, false, \
1698 "Whether abort-on-overflow semantics is implemented") \
1699 \
1700 product(bool, CMSParallelInitialMarkEnabled, true, \
1701 "Use the parallel initial mark.") \
1702 \
1703 product(bool, CMSParallelRemarkEnabled, true, \
1704 "Whether parallel remark enabled (only if ParNewGC)") \
1705 \
1706 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1707 "Whether parallel remark of survivor space" \
1708 " enabled (effective only if CMSParallelRemarkEnabled)") \
1709 \
1710 product(bool, CMSPLABRecordAlways, true, \
1711 "Whether to always record survivor space PLAB bdries" \
1712 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1713 \
1714 product(bool, CMSEdenChunksRecordAlways, true, \
1715 "Whether to always record eden chunks used for " \
1716 "the parallel initial mark or remark of eden" ) \
1717 \
1718 product(bool, CMSPrintEdenSurvivorChunks, false, \
1719 "Print the eden and the survivor chunks used for the parallel " \
1720 "initial mark or remark of the eden/survivor spaces") \
1721 \
1722 product(bool, CMSConcurrentMTEnabled, true, \
1723 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1724 \
1725 product(bool, CMSPermGenPrecleaningEnabled, true, \
1726 "Whether concurrent precleaning enabled in perm gen" \
1727 " (effective only when CMSPrecleaningEnabled is true)") \
1728 \
1729 product(bool, CMSPrecleaningEnabled, true, \
1730 "Whether concurrent precleaning enabled") \
1731 \
1732 product(uintx, CMSPrecleanIter, 3, \
1733 "Maximum number of precleaning iteration passes") \
1734 \
1735 product(uintx, CMSPrecleanNumerator, 2, \
1736 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1737 " ratio") \
1738 \
1739 product(uintx, CMSPrecleanDenominator, 3, \
1740 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1741 " ratio") \
1742 \
1743 product(bool, CMSPrecleanRefLists1, true, \
1744 "Preclean ref lists during (initial) preclean phase") \
1745 \
1746 product(bool, CMSPrecleanRefLists2, false, \
1747 "Preclean ref lists during abortable preclean phase") \
1748 \
1749 product(bool, CMSPrecleanSurvivors1, false, \
1750 "Preclean survivors during (initial) preclean phase") \
1751 \
1752 product(bool, CMSPrecleanSurvivors2, true, \
1753 "Preclean survivors during abortable preclean phase") \
1754 \
1755 product(uintx, CMSPrecleanThreshold, 1000, \
1756 "Don't re-iterate if #dirty cards less than this") \
1757 \
1758 product(bool, CMSCleanOnEnter, true, \
1759 "Clean-on-enter optimization for reducing number of dirty cards") \
1760 \
1761 product(uintx, CMSRemarkVerifyVariant, 1, \
1762 "Choose variant (1,2) of verification following remark") \
1763 \
1764 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1765 "If Eden used is below this value, don't try to schedule remark") \
1766 \
1767 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1768 "The Eden occupancy % at which to try and schedule remark pause") \
1769 \
1770 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1771 "Start sampling Eden top at least before yg occupancy reaches" \
1772 " 1/<ratio> of the size at which we plan to schedule remark") \
1773 \
1774 product(uintx, CMSSamplingGrain, 16*K, \
1775 "The minimum distance between eden samples for CMS (see above)") \
1776 \
1777 product(bool, CMSScavengeBeforeRemark, false, \
1778 "Attempt scavenge before the CMS remark step") \
1779 \
1780 develop(bool, CMSTraceSweeper, false, \
1781 "Trace some actions of the CMS sweeper") \
1782 \
1783 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1784 "Don't drain below this size per parallel worker/thief") \
1785 \
1786 manageable(intx, CMSWaitDuration, 2000, \
1787 "Time in milliseconds that CMS thread waits for young GC") \
1788 \
1789 product(bool, CMSYield, true, \
1790 "Yield between steps of concurrent mark & sweep") \
1791 \
1792 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1793 "Bitmap operations should process at most this many bits" \
1794 "between yields") \
1795 \
1796 product(bool, CMSDumpAtPromotionFailure, false, \
1797 "Dump useful information about the state of the CMS old " \
1798 " generation upon a promotion failure.") \
1799 \
1800 product(bool, CMSPrintChunksInDump, false, \
1801 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1802 " more detailed information about the free chunks.") \
1803 \
1804 product(bool, CMSPrintObjectsInDump, false, \
1805 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1806 " more detailed information about the allocated objects.") \
1807 \
1808 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1809 "Verify that all refs across the FLS boundary " \
1810 " are to valid objects") \
1811 \
1812 diagnostic(bool, FLSVerifyLists, false, \
1813 "Do lots of (expensive) FreeListSpace verification") \
1814 \
1815 diagnostic(bool, FLSVerifyIndexTable, false, \
1816 "Do lots of (expensive) FLS index table verification") \
1817 \
1818 develop(bool, FLSVerifyDictionary, false, \
1819 "Do lots of (expensive) FLS dictionary verification") \
1820 \
1821 develop(bool, VerifyBlockOffsetArray, false, \
1822 "Do (expensive!) block offset array verification") \
1823 \
1824 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1825 "Maintain _unallocated_block in BlockOffsetArray" \
1826 " (currently applicable only to CMS collector)") \
1827 \
1828 develop(bool, TraceCMSState, false, \
1829 "Trace the state of the CMS collection") \
1830 \
1831 product(intx, RefDiscoveryPolicy, 0, \
1832 "Whether reference-based(0) or referent-based(1)") \
1833 \
1834 product(bool, ParallelRefProcEnabled, false, \
1835 "Enable parallel reference processing whenever possible") \
1836 \
1837 product(bool, ParallelRefProcBalancingEnabled, true, \
1838 "Enable balancing of reference processing queues") \
1839 \
1840 product(intx, CMSTriggerRatio, 80, \
1841 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1842 "allocated before a CMS collection cycle commences") \
1843 \
1844 product(intx, CMSTriggerPermRatio, 80, \
1845 "Percentage of MinHeapFreeRatio in the CMS perm generation that " \
1846 "is allocated before a CMS collection cycle commences, that " \
1847 "also collects the perm generation") \
1848 \
1849 product(uintx, CMSBootstrapOccupancy, 50, \
1850 "Percentage CMS generation occupancy at which to " \
1851 "initiate CMS collection for bootstrapping collection stats") \
1852 \
1853 product(intx, CMSInitiatingOccupancyFraction, -1, \
1854 "Percentage CMS generation occupancy to start a CMS collection " \
1855 "cycle. A negative value means that CMSTriggerRatio is used") \
1856 \
1857 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1858 "Percentage of the (entire) heap occupancy to start a " \
1859 "concurrent GC cycle. It us used by GCs that trigger a " \
1860 "concurrent GC cycle based on the occupancy of the entire heap, " \
1861 "not just one of the generations (e.g., G1). A value of 0 " \
1862 "denotes 'do constant GC cycles'.") \
1863 \
1864 product(intx, CMSInitiatingPermOccupancyFraction, -1, \
1865 "Percentage CMS perm generation occupancy to start a " \
1866 "CMScollection cycle. A negative value means that " \
1867 "CMSTriggerPermRatio is used") \
1868 \
1869 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1870 "Only use occupancy as a crierion for starting a CMS collection") \
1871 \
1872 product(intx, CMSIsTooFullPercentage, 98, \
1873 "An absolute ceiling above which CMS will always consider the " \
1874 "perm gen ripe for collection") \
1875 \
1876 develop(bool, CMSTestInFreeList, false, \
1877 "Check if the coalesced range is already in the " \
1878 "free lists as claimed") \
1879 \
1880 notproduct(bool, CMSVerifyReturnedBytes, false, \
1881 "Check that all the garbage collected was returned to the " \
1882 "free lists.") \
1883 \
1884 notproduct(bool, ScavengeALot, false, \
1885 "Force scavenge at every Nth exit from the runtime system " \
1886 "(N=ScavengeALotInterval)") \
1887 \
1888 develop(bool, FullGCALot, false, \
1889 "Force full gc at every Nth exit from the runtime system " \
1890 "(N=FullGCALotInterval)") \
1891 \
1892 notproduct(bool, GCALotAtAllSafepoints, false, \
1893 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1894 \
1895 product(bool, PrintPromotionFailure, false, \
1896 "Print additional diagnostic information following " \
1897 " promotion failure") \
1898 \
1899 notproduct(bool, PromotionFailureALot, false, \
1900 "Use promotion failure handling on every youngest generation " \
1901 "collection") \
1902 \
1903 develop(uintx, PromotionFailureALotCount, 1000, \
1904 "Number of promotion failures occurring at ParGCAllocBuffer" \
1905 "refill attempts (ParNew) or promotion attempts " \
1906 "(other young collectors) ") \
1907 \
1908 develop(uintx, PromotionFailureALotInterval, 5, \
1909 "Total collections between promotion failures alot") \
1910 \
1911 experimental(intx, WorkStealingSleepMillis, 1, \
1912 "Sleep time when sleep is used for yields") \
1913 \
1914 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
1915 "Number of yields before a sleep is done during workstealing") \
1916 \
1917 experimental(uintx, WorkStealingHardSpins, 4096, \
1918 "Number of iterations in a spin loop between checks on " \
1919 "time out of hard spin") \
1920 \
1921 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
1922 "Ratio of hard spins to calls to yield") \
1923 \
1924 develop(uintx, ObjArrayMarkingStride, 512, \
1925 "Number of ObjArray elements to push onto the marking stack" \
1926 "before pushing a continuation entry") \
1927 \
1928 notproduct(bool, ExecuteInternalVMTests, false, \
1929 "Enable execution of internal VM tests.") \
1930 \
1931 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
1932 \
1933 product_pd(bool, ResizeTLAB, \
1934 "Dynamically resize tlab size for threads") \
1935 \
1936 product(bool, ZeroTLAB, false, \
1937 "Zero out the newly created TLAB") \
1938 \
1939 product(bool, FastTLABRefill, true, \
1940 "Use fast TLAB refill code") \
1941 \
1942 product(bool, PrintTLAB, false, \
1943 "Print various TLAB related information") \
1944 \
1945 product(bool, TLABStats, true, \
1946 "Print various TLAB related information") \
1947 \
1948 product(bool, PrintRevisitStats, false, \
1949 "Print revisit (klass and MDO) stack related information") \
1950 \
1951 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \
1952 "Enable LowMemoryProtection")) \
1953 \
1954 product_pd(bool, NeverActAsServerClassMachine, \
1955 "Never act like a server-class machine") \
1956 \
1957 product(bool, AlwaysActAsServerClassMachine, false, \
1958 "Always act like a server-class machine") \
1959 \
1960 product_pd(uint64_t, MaxRAM, \
1961 "Real memory size (in bytes) used to set maximum heap size") \
1962 \
1963 product(uintx, ErgoHeapSizeLimit, 0, \
1964 "Maximum ergonomically set heap size (in bytes); zero means use " \
1965 "MaxRAM / MaxRAMFraction") \
1966 \
1967 product(uintx, MaxRAMFraction, 4, \
1968 "Maximum fraction (1/n) of real memory used for maximum heap " \
1969 "size") \
1970 \
1971 product(uintx, DefaultMaxRAMFraction, 4, \
1972 "Maximum fraction (1/n) of real memory used for maximum heap " \
1973 "size; deprecated: to be renamed to MaxRAMFraction") \
1974 \
1975 product(uintx, MinRAMFraction, 2, \
1976 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
1977 "size on systems with small physical memory size") \
1978 \
1979 product(uintx, InitialRAMFraction, 64, \
1980 "Fraction (1/n) of real memory used for initial heap size") \
1981 \
1982 product(bool, UseAutoGCSelectPolicy, false, \
1983 "Use automatic collection selection policy") \
1984 \
1985 product(uintx, AutoGCSelectPauseMillis, 5000, \
1986 "Automatic GC selection pause threshhold in ms") \
1987 \
1988 product(bool, UseAdaptiveSizePolicy, true, \
1989 "Use adaptive generation sizing policies") \
1990 \
1991 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
1992 "Use adaptive survivor sizing policies") \
1993 \
1994 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
1995 "Use adaptive young-old sizing policies at minor collections") \
1996 \
1997 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
1998 "Use adaptive young-old sizing policies at major collections") \
1999 \
2000 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2001 "Use statistics from System.GC for adaptive size policy") \
2002 \
2003 product(bool, UseAdaptiveGCBoundary, false, \
2004 "Allow young-old boundary to move") \
2005 \
2006 develop(bool, TraceAdaptiveGCBoundary, false, \
2007 "Trace young-old boundary moves") \
2008 \
2009 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2010 "Resize the virtual spaces of the young or old generations") \
2011 \
2012 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2013 "Policy for changeing generation size for throughput goals") \
2014 \
2015 product(uintx, AdaptiveSizePausePolicy, 0, \
2016 "Policy for changing generation size for pause goals") \
2017 \
2018 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2019 "Adjust tenured generation to achive a minor pause goal") \
2020 \
2021 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2022 "Adjust young generation to achive a major pause goal") \
2023 \
2024 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2025 "Number of steps where heuristics is used before data is used") \
2026 \
2027 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2028 "Number of collections before the adaptive sizing is started") \
2029 \
2030 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2031 "Collecton interval for printing information; zero => never") \
2032 \
2033 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2034 "Use adaptive minimum footprint as a goal") \
2035 \
2036 product(uintx, AdaptiveSizePolicyWeight, 10, \
2037 "Weight given to exponential resizing, between 0 and 100") \
2038 \
2039 product(uintx, AdaptiveTimeWeight, 25, \
2040 "Weight given to time in adaptive policy, between 0 and 100") \
2041 \
2042 product(uintx, PausePadding, 1, \
2043 "How much buffer to keep for pause time") \
2044 \
2045 product(uintx, PromotedPadding, 3, \
2046 "How much buffer to keep for promotion failure") \
2047 \
2048 product(uintx, SurvivorPadding, 3, \
2049 "How much buffer to keep for survivor overflow") \
2050 \
2051 product(uintx, AdaptivePermSizeWeight, 20, \
2052 "Weight for perm gen exponential resizing, between 0 and 100") \
2053 \
2054 product(uintx, PermGenPadding, 3, \
2055 "How much buffer to keep for perm gen sizing") \
2056 \
2057 product(uintx, ThresholdTolerance, 10, \
2058 "Allowed collection cost difference between generations") \
2059 \
2060 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2061 "If collection costs are within margin, reduce both by full " \
2062 "delta") \
2063 \
2064 product(uintx, YoungGenerationSizeIncrement, 20, \
2065 "Adaptive size percentage change in young generation") \
2066 \
2067 product(uintx, YoungGenerationSizeSupplement, 80, \
2068 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2069 \
2070 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2071 "Decay factor to YoungedGenerationSizeSupplement") \
2072 \
2073 product(uintx, TenuredGenerationSizeIncrement, 20, \
2074 "Adaptive size percentage change in tenured generation") \
2075 \
2076 product(uintx, TenuredGenerationSizeSupplement, 80, \
2077 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2078 \
2079 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2080 "Decay factor to TenuredGenerationSizeIncrement") \
2081 \
2082 product(uintx, MaxGCPauseMillis, max_uintx, \
2083 "Adaptive size policy maximum GC pause time goal in msec, " \
2084 "or (G1 Only) the max. GC time per MMU time slice") \
2085 \
2086 product(uintx, GCPauseIntervalMillis, 0, \
2087 "Time slice for MMU specification") \
2088 \
2089 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2090 "Adaptive size policy maximum GC minor pause time goal in msec") \
2091 \
2092 product(uintx, GCTimeRatio, 99, \
2093 "Adaptive size policy application time to GC time ratio") \
2094 \
2095 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2096 "Adaptive size scale down factor for shrinking") \
2097 \
2098 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2099 "Adaptive size decays the major cost for long major intervals") \
2100 \
2101 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2102 "Time scale over which major costs decay") \
2103 \
2104 product(uintx, MinSurvivorRatio, 3, \
2105 "Minimum ratio of young generation/survivor space size") \
2106 \
2107 product(uintx, InitialSurvivorRatio, 8, \
2108 "Initial ratio of eden/survivor space size") \
2109 \
2110 product(uintx, BaseFootPrintEstimate, 256*M, \
2111 "Estimate of footprint other than Java Heap") \
2112 \
2113 product(bool, UseGCOverheadLimit, true, \
2114 "Use policy to limit of proportion of time spent in GC " \
2115 "before an OutOfMemory error is thrown") \
2116 \
2117 product(uintx, GCTimeLimit, 98, \
2118 "Limit of proportion of time spent in GC before an OutOfMemory" \
2119 "error is thrown (used with GCHeapFreeLimit)") \
2120 \
2121 product(uintx, GCHeapFreeLimit, 2, \
2122 "Minimum percentage of free space after a full GC before an " \
2123 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2124 \
2125 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2126 "Number of consecutive collections before gc time limit fires") \
2127 \
2128 product(bool, PrintAdaptiveSizePolicy, false, \
2129 "Print information about AdaptiveSizePolicy") \
2130 \
2131 product(intx, PrefetchCopyIntervalInBytes, -1, \
2132 "How far ahead to prefetch destination area (<= 0 means off)") \
2133 \
2134 product(intx, PrefetchScanIntervalInBytes, -1, \
2135 "How far ahead to prefetch scan area (<= 0 means off)") \
2136 \
2137 product(intx, PrefetchFieldsAhead, -1, \
2138 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2139 \
2140 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2141 "Verify system before exiting") \
2142 \
2143 diagnostic(bool, VerifyBeforeGC, false, \
2144 "Verify memory system before GC") \
2145 \
2146 diagnostic(bool, VerifyAfterGC, false, \
2147 "Verify memory system after GC") \
2148 \
2149 diagnostic(bool, VerifyDuringGC, false, \
2150 "Verify memory system during GC (between phases)") \
2151 \
2152 diagnostic(bool, GCParallelVerificationEnabled, true, \
2153 "Enable parallel memory system verification") \
2154 \
2155 diagnostic(bool, DeferInitialCardMark, false, \
2156 "When +ReduceInitialCardMarks, explicitly defer any that " \
2157 "may arise from new_pre_store_barrier") \
2158 \
2159 diagnostic(bool, VerifyRememberedSets, false, \
2160 "Verify GC remembered sets") \
2161 \
2162 diagnostic(bool, VerifyObjectStartArray, true, \
2163 "Verify GC object start array if verify before/after") \
2164 \
2165 product(bool, DisableExplicitGC, false, \
2166 "Tells whether calling System.gc() does a full GC") \
2167 \
2168 notproduct(bool, CheckMemoryInitialization, false, \
2169 "Checks memory initialization") \
2170 \
2171 product(bool, CollectGen0First, false, \
2172 "Collect youngest generation before each full GC") \
2173 \
2174 diagnostic(bool, BindCMSThreadToCPU, false, \
2175 "Bind CMS Thread to CPU if possible") \
2176 \
2177 diagnostic(uintx, CPUForCMSThread, 0, \
2178 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2179 \
2180 product(bool, BindGCTaskThreadsToCPUs, false, \
2181 "Bind GCTaskThreads to CPUs if possible") \
2182 \
2183 product(bool, UseGCTaskAffinity, false, \
2184 "Use worker affinity when asking for GCTasks") \
2185 \
2186 product(uintx, ProcessDistributionStride, 4, \
2187 "Stride through processors when distributing processes") \
2188 \
2189 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2190 "number of times the coordinator GC thread will sleep while " \
2191 "yielding before giving up and resuming GC") \
2192 \
2193 product(uintx, CMSYieldSleepCount, 0, \
2194 "number of times a GC thread (minus the coordinator) " \
2195 "will sleep while yielding before giving up and resuming GC") \
2196 \
2197 /* gc tracing */ \
2198 manageable(bool, PrintGC, false, \
2199 "Print message at garbage collect") \
2200 \
2201 manageable(bool, PrintGCDetails, false, \
2202 "Print more details at garbage collect") \
2203 \
2204 manageable(bool, PrintGCDateStamps, false, \
2205 "Print date stamps at garbage collect") \
2206 \
2207 manageable(bool, PrintGCTimeStamps, false, \
2208 "Print timestamps at garbage collect") \
2209 \
2210 product(bool, PrintGCTaskTimeStamps, false, \
2211 "Print timestamps for individual gc worker thread tasks") \
2212 \
2213 develop(intx, ConcGCYieldTimeout, 0, \
2214 "If non-zero, assert that GC threads yield within this # of ms.") \
2215 \
2216 notproduct(bool, TraceMarkSweep, false, \
2217 "Trace mark sweep") \
2218 \
2219 product(bool, PrintReferenceGC, false, \
2220 "Print times spent handling reference objects during GC " \
2221 " (enabled only when PrintGCDetails)") \
2222 \
2223 develop(bool, TraceReferenceGC, false, \
2224 "Trace handling of soft/weak/final/phantom references") \
2225 \
2226 develop(bool, TraceFinalizerRegistration, false, \
2227 "Trace registration of final references") \
2228 \
2229 notproduct(bool, TraceScavenge, false, \
2230 "Trace scavenge") \
2231 \
2232 product_rw(bool, TraceClassLoading, false, \
2233 "Trace all classes loaded") \
2234 \
2235 product(bool, TraceClassLoadingPreorder, false, \
2236 "Trace all classes loaded in order referenced (not loaded)") \
2237 \
2238 product_rw(bool, TraceClassUnloading, false, \
2239 "Trace unloading of classes") \
2240 \
2241 product_rw(bool, TraceLoaderConstraints, false, \
2242 "Trace loader constraints") \
2243 \
2244 product(bool, TraceGen0Time, false, \
2245 "Trace accumulated time for Gen 0 collection") \
2246 \
2247 product(bool, TraceGen1Time, false, \
2248 "Trace accumulated time for Gen 1 collection") \
2249 \
2250 product(bool, PrintTenuringDistribution, false, \
2251 "Print tenuring age information") \
2252 \
2253 product_rw(bool, PrintHeapAtGC, false, \
2254 "Print heap layout before and after each GC") \
2255 \
2256 product_rw(bool, PrintHeapAtGCExtended, false, \
2257 "Prints extended information about the layout of the heap " \
2258 "when -XX:+PrintHeapAtGC is set") \
2259 \
2260 product(bool, PrintHeapAtSIGBREAK, true, \
2261 "Print heap layout in response to SIGBREAK") \
2262 \
2263 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2264 "Print a class histogram before any major stop-world GC") \
2265 \
2266 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2267 "Print a class histogram after any major stop-world GC") \
2268 \
2269 manageable(bool, PrintClassHistogram, false, \
2270 "Print a histogram of class instances") \
2271 \
2272 develop(bool, TraceWorkGang, false, \
2273 "Trace activities of work gangs") \
2274 \
2275 product(bool, TraceParallelOldGCTasks, false, \
2276 "Trace multithreaded GC activity") \
2277 \
2278 develop(bool, TraceBlockOffsetTable, false, \
2279 "Print BlockOffsetTable maps") \
2280 \
2281 develop(bool, TraceCardTableModRefBS, false, \
2282 "Print CardTableModRefBS maps") \
2283 \
2284 develop(bool, TraceGCTaskManager, false, \
2285 "Trace actions of the GC task manager") \
2286 \
2287 develop(bool, TraceGCTaskQueue, false, \
2288 "Trace actions of the GC task queues") \
2289 \
2290 diagnostic(bool, TraceGCTaskThread, false, \
2291 "Trace actions of the GC task threads") \
2292 \
2293 product(bool, PrintParallelOldGCPhaseTimes, false, \
2294 "Print the time taken by each parallel old gc phase." \
2295 "PrintGCDetails must also be enabled.") \
2296 \
2297 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2298 "Trace parallel old gc marking phase") \
2299 \
2300 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2301 "Trace parallel old gc summary phase") \
2302 \
2303 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2304 "Trace parallel old gc compaction phase") \
2305 \
2306 develop(bool, TraceParallelOldGCDensePrefix, false, \
2307 "Trace parallel old gc dense prefix computation") \
2308 \
2309 develop(bool, IgnoreLibthreadGPFault, false, \
2310 "Suppress workaround for libthread GP fault") \
2311 \
2312 product(bool, PrintJNIGCStalls, false, \
2313 "Print diagnostic message when GC is stalled" \
2314 "by JNI critical section") \
2315 \
2316 experimental(double, ObjectCountCutOffPercent, 0.5, \
2317 "The percentage of the used heap that the instances of a class " \
2318 "must occupy for the class to generate a trace event.") \
2319 \
2320 /* GC log rotation setting */ \
2321 \
2322 product(bool, UseGCLogFileRotation, false, \
2323 "Prevent large gclog file for long running app. " \
2324 "Requires -Xloggc:<filename>") \
2325 \
2326 product(uintx, NumberOfGCLogFiles, 0, \
2327 "Number of gclog files in rotation, " \
2328 "Default: 0, no rotation") \
2329 \
2330 product(uintx, GCLogFileSize, 0, \
2331 "GC log file size, Default: 0 bytes, no rotation " \
2332 "Only valid with UseGCLogFileRotation") \
2333 \
2334 /* JVMTI heap profiling */ \
2335 \
2336 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2337 "Trace JVMTI object tagging calls") \
2338 \
2339 diagnostic(bool, VerifyBeforeIteration, false, \
2340 "Verify memory system before JVMTI iteration") \
2341 \
2342 /* compiler interface */ \
2343 \
2344 develop(bool, CIPrintCompilerName, false, \
2345 "when CIPrint is active, print the name of the active compiler") \
2346 \
2347 develop(bool, CIPrintCompileQueue, false, \
2348 "display the contents of the compile queue whenever a " \
2349 "compilation is enqueued") \
2350 \
2351 develop(bool, CIPrintRequests, false, \
2352 "display every request for compilation") \
2353 \
2354 product(bool, CITime, false, \
2355 "collect timing information for compilation") \
2356 \
2357 develop(bool, CITimeEach, false, \
2358 "display timing information after each successful compilation") \
2359 \
2360 develop(bool, CICountOSR, false, \
2361 "use a separate counter when assigning ids to osr compilations") \
2362 \
2363 develop(bool, CICompileNatives, true, \
2364 "compile native methods if supported by the compiler") \
2365 \
2366 develop_pd(bool, CICompileOSR, \
2367 "compile on stack replacement methods if supported by the " \
2368 "compiler") \
2369 \
2370 develop(bool, CIPrintMethodCodes, false, \
2371 "print method bytecodes of the compiled code") \
2372 \
2373 develop(bool, CIPrintTypeFlow, false, \
2374 "print the results of ciTypeFlow analysis") \
2375 \
2376 develop(bool, CITraceTypeFlow, false, \
2377 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2378 \
2379 develop(intx, OSROnlyBCI, -1, \
2380 "OSR only at this bci. Negative values mean exclude that bci") \
2381 \
2382 /* compiler */ \
2383 \
2384 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2385 "Number of compiler threads to run") \
2386 \
2387 product(intx, CompilationPolicyChoice, 0, \
2388 "which compilation policy (0/1)") \
2389 \
2390 develop(bool, UseStackBanging, true, \
2391 "use stack banging for stack overflow checks (required for " \
2392 "proper StackOverflow handling; disable only to measure cost " \
2393 "of stackbanging)") \
2394 \
2395 develop(bool, UseStrictFP, true, \
2396 "use strict fp if modifier strictfp is set") \
2397 \
2398 develop(bool, GenerateSynchronizationCode, true, \
2399 "generate locking/unlocking code for synchronized methods and " \
2400 "monitors") \
2401 \
2402 develop(bool, GenerateCompilerNullChecks, true, \
2403 "Generate explicit null checks for loads/stores/calls") \
2404 \
2405 develop(bool, GenerateRangeChecks, true, \
2406 "Generate range checks for array accesses") \
2407 \
2408 develop_pd(bool, ImplicitNullChecks, \
2409 "generate code for implicit null checks") \
2410 \
2411 product(bool, PrintSafepointStatistics, false, \
2412 "print statistics about safepoint synchronization") \
2413 \
2414 product(intx, PrintSafepointStatisticsCount, 300, \
2415 "total number of safepoint statistics collected " \
2416 "before printing them out") \
2417 \
2418 product(intx, PrintSafepointStatisticsTimeout, -1, \
2419 "print safepoint statistics only when safepoint takes" \
2420 " more than PrintSafepointSatisticsTimeout in millis") \
2421 \
2422 product(bool, TraceSafepointCleanupTime, false, \
2423 "print the break down of clean up tasks performed during" \
2424 " safepoint") \
2425 \
2426 product(bool, Inline, true, \
2427 "enable inlining") \
2428 \
2429 product(bool, ClipInlining, true, \
2430 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2431 \
2432 develop(bool, UseCHA, true, \
2433 "enable CHA") \
2434 \
2435 product(bool, UseTypeProfile, true, \
2436 "Check interpreter profile for historically monomorphic calls") \
2437 \
2438 notproduct(bool, TimeCompiler, false, \
2439 "time the compiler") \
2440 \
2441 diagnostic(bool, PrintInlining, false, \
2442 "prints inlining optimizations") \
2443 \
2444 product(bool, UsePopCountInstruction, false, \
2445 "Use population count instruction") \
2446 \
2447 develop(bool, EagerInitialization, false, \
2448 "Eagerly initialize classes if possible") \
2449 \
2450 develop(bool, TraceMethodReplacement, false, \
2451 "Print when methods are replaced do to recompilation") \
2452 \
2453 develop(bool, PrintMethodFlushing, false, \
2454 "print the nmethods being flushed") \
2455 \
2456 develop(bool, UseRelocIndex, false, \
2457 "use an index to speed random access to relocations") \
2458 \
2459 develop(bool, StressCodeBuffers, false, \
2460 "Exercise code buffer expansion and other rare state changes") \
2461 \
2462 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2463 "Generate extra debugging info for non-safepoints in nmethods") \
2464 \
2465 product(bool, PrintVMOptions, false, \
2466 "Print flags that appeared on the command line") \
2467 \
2468 product(bool, IgnoreUnrecognizedVMOptions, false, \
2469 "Ignore unrecognized VM options") \
2470 \
2471 product(bool, PrintCommandLineFlags, false, \
2472 "Print flags specified on command line or set by ergonomics") \
2473 \
2474 product(bool, PrintFlagsInitial, false, \
2475 "Print all VM flags before argument processing and exit VM") \
2476 \
2477 product(bool, PrintFlagsFinal, false, \
2478 "Print all VM flags after argument and ergonomic processing") \
2479 \
2480 notproduct(bool, PrintFlagsWithComments, false, \
2481 "Print all VM flags with default values and descriptions and exit")\
2482 \
2483 diagnostic(bool, SerializeVMOutput, true, \
2484 "Use a mutex to serialize output to tty and hotspot.log") \
2485 \
2486 diagnostic(bool, DisplayVMOutput, true, \
2487 "Display all VM output on the tty, independently of LogVMOutput") \
2488 \
2489 diagnostic(bool, LogVMOutput, trueInDebug, \
2490 "Save VM output to hotspot.log, or to LogFile") \
2491 \
2492 diagnostic(ccstr, LogFile, NULL, \
2493 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2494 \
2495 product(ccstr, ErrorFile, NULL, \
2496 "If an error occurs, save the error data to this file " \
2497 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2498 \
2499 product(bool, DisplayVMOutputToStderr, false, \
2500 "If DisplayVMOutput is true, display all VM output to stderr") \
2501 \
2502 product(bool, DisplayVMOutputToStdout, false, \
2503 "If DisplayVMOutput is true, display all VM output to stdout") \
2504 \
2505 product(bool, UseHeavyMonitors, false, \
2506 "use heavyweight instead of lightweight Java monitors") \
2507 \
2508 product(bool, PrintStringTableStatistics, false, \
2509 "print statistics about the StringTable and SymbolTable") \
2510 \
2511 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2512 "print histogram of the symbol table") \
2513 \
2514 notproduct(bool, ExitVMOnVerifyError, false, \
2515 "standard exit from VM if bytecode verify error " \
2516 "(only in debug mode)") \
2517 \
2518 notproduct(ccstr, AbortVMOnException, NULL, \
2519 "Call fatal if this exception is thrown. Example: " \
2520 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2521 \
2522 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2523 "Call fatal if the exception pointed by AbortVMOnException " \
2524 "has this message.") \
2525 \
2526 develop(bool, DebugVtables, false, \
2527 "add debugging code to vtable dispatch") \
2528 \
2529 develop(bool, PrintVtables, false, \
2530 "print vtables when printing klass") \
2531 \
2532 notproduct(bool, PrintVtableStats, false, \
2533 "print vtables stats at end of run") \
2534 \
2535 develop(bool, TraceCreateZombies, false, \
2536 "trace creation of zombie nmethods") \
2537 \
2538 notproduct(bool, IgnoreLockingAssertions, false, \
2539 "disable locking assertions (for speed)") \
2540 \
2541 product(bool, RangeCheckElimination, true, \
2542 "Split loop iterations to eliminate range checks") \
2543 \
2544 develop_pd(bool, UncommonNullCast, \
2545 "track occurrences of null in casts; adjust compiler tactics") \
2546 \
2547 develop(bool, TypeProfileCasts, true, \
2548 "treat casts like calls for purposes of type profiling") \
2549 \
2550 develop(bool, DelayCompilationDuringStartup, true, \
2551 "Delay invoking the compiler until main application class is " \
2552 "loaded") \
2553 \
2554 develop(bool, CompileTheWorld, false, \
2555 "Compile all methods in all classes in bootstrap class path " \
2556 "(stress test)") \
2557 \
2558 develop(bool, CompileTheWorldPreloadClasses, true, \
2559 "Preload all classes used by a class before start loading") \
2560 \
2561 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2562 "Force a safepoint every n compiles so sweeper can keep up") \
2563 \
2564 develop(bool, FillDelaySlots, true, \
2565 "Fill delay slots (on SPARC only)") \
2566 \
2567 develop(bool, TimeLivenessAnalysis, false, \
2568 "Time computation of bytecode liveness analysis") \
2569 \
2570 develop(bool, TraceLivenessGen, false, \
2571 "Trace the generation of liveness analysis information") \
2572 \
2573 notproduct(bool, TraceLivenessQuery, false, \
2574 "Trace queries of liveness analysis information") \
2575 \
2576 notproduct(bool, CollectIndexSetStatistics, false, \
2577 "Collect information about IndexSets") \
2578 \
2579 develop(bool, UseLoopSafepoints, true, \
2580 "Generate Safepoint nodes in every loop") \
2581 \
2582 develop(intx, FastAllocateSizeLimit, 128*K, \
2583 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2584 "Inline allocations larger than this in doublewords must go slow")\
2585 \
2586 product(bool, AggressiveOpts, false, \
2587 "Enable aggressive optimizations - see arguments.cpp") \
2588 \
2589 product(bool, UseStringCache, false, \
2590 "Enable String cache capabilities on String.java") \
2591 \
2592 /* statistics */ \
2593 develop(bool, CountCompiledCalls, false, \
2594 "counts method invocations") \
2595 \
2596 notproduct(bool, CountRuntimeCalls, false, \
2597 "counts VM runtime calls") \
2598 \
2599 develop(bool, CountJNICalls, false, \
2600 "counts jni method invocations") \
2601 \
2602 notproduct(bool, CountJVMCalls, false, \
2603 "counts jvm method invocations") \
2604 \
2605 notproduct(bool, CountRemovableExceptions, false, \
2606 "count exceptions that could be replaced by branches due to " \
2607 "inlining") \
2608 \
2609 notproduct(bool, ICMissHistogram, false, \
2610 "produce histogram of IC misses") \
2611 \
2612 notproduct(bool, PrintClassStatistics, false, \
2613 "prints class statistics at end of run") \
2614 \
2615 notproduct(bool, PrintMethodStatistics, false, \
2616 "prints method statistics at end of run") \
2617 \
2618 /* interpreter */ \
2619 develop(bool, ClearInterpreterLocals, false, \
2620 "Always clear local variables of interpreter activations upon " \
2621 "entry") \
2622 \
2623 product_pd(bool, RewriteBytecodes, \
2624 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2625 \
2626 product_pd(bool, RewriteFrequentPairs, \
2627 "Rewrite frequently used bytecode pairs into a single bytecode") \
2628 \
2629 diagnostic(bool, PrintInterpreter, false, \
2630 "Prints the generated interpreter code") \
2631 \
2632 product(bool, UseInterpreter, true, \
2633 "Use interpreter for non-compiled methods") \
2634 \
2635 develop(bool, UseFastSignatureHandlers, true, \
2636 "Use fast signature handlers for native calls") \
2637 \
2638 product(bool, UseLoopCounter, true, \
2639 "Increment invocation counter on backward branch") \
2640 \
2641 product(bool, UseFastEmptyMethods, true, \
2642 "Use fast method entry code for empty methods") \
2643 \
2644 product(bool, UseFastAccessorMethods, true, \
2645 "Use fast method entry code for accessor methods") \
2646 \
2647 product_pd(bool, UseOnStackReplacement, \
2648 "Use on stack replacement, calls runtime if invoc. counter " \
2649 "overflows in loop") \
2650 \
2651 notproduct(bool, TraceOnStackReplacement, false, \
2652 "Trace on stack replacement") \
2653 \
2654 product_pd(bool, PreferInterpreterNativeStubs, \
2655 "Use always interpreter stubs for native methods invoked via " \
2656 "interpreter") \
2657 \
2658 develop(bool, CountBytecodes, false, \
2659 "Count number of bytecodes executed") \
2660 \
2661 develop(bool, PrintBytecodeHistogram, false, \
2662 "Print histogram of the executed bytecodes") \
2663 \
2664 develop(bool, PrintBytecodePairHistogram, false, \
2665 "Print histogram of the executed bytecode pairs") \
2666 \
2667 diagnostic(bool, PrintSignatureHandlers, false, \
2668 "Print code generated for native method signature handlers") \
2669 \
2670 develop(bool, VerifyOops, false, \
2671 "Do plausibility checks for oops") \
2672 \
2673 develop(bool, CheckUnhandledOops, false, \
2674 "Check for unhandled oops in VM code") \
2675 \
2676 develop(bool, VerifyJNIFields, trueInDebug, \
2677 "Verify jfieldIDs for instance fields") \
2678 \
2679 notproduct(bool, VerifyJNIEnvThread, false, \
2680 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2681 "from JNI") \
2682 \
2683 develop(bool, VerifyFPU, false, \
2684 "Verify FPU state (check for NaN's, etc.)") \
2685 \
2686 develop(bool, VerifyThread, false, \
2687 "Watch the thread register for corruption (SPARC only)") \
2688 \
2689 develop(bool, VerifyActivationFrameSize, false, \
2690 "Verify that activation frame didn't become smaller than its " \
2691 "minimal size") \
2692 \
2693 develop(bool, TraceFrequencyInlining, false, \
2694 "Trace frequency based inlining") \
2695 \
2696 develop_pd(bool, InlineIntrinsics, \
2697 "Inline intrinsics that can be statically resolved") \
2698 \
2699 product_pd(bool, ProfileInterpreter, \
2700 "Profile at the bytecode level during interpretation") \
2701 \
2702 develop_pd(bool, ProfileTraps, \
2703 "Profile deoptimization traps at the bytecode level") \
2704 \
2705 product(intx, ProfileMaturityPercentage, 20, \
2706 "number of method invocations/branches (expressed as % of " \
2707 "CompileThreshold) before using the method's profile") \
2708 \
2709 develop(bool, PrintMethodData, false, \
2710 "Print the results of +ProfileInterpreter at end of run") \
2711 \
2712 develop(bool, VerifyDataPointer, trueInDebug, \
2713 "Verify the method data pointer during interpreter profiling") \
2714 \
2715 develop(bool, VerifyCompiledCode, false, \
2716 "Include miscellaneous runtime verifications in nmethod code; " \
2717 "default off because it disturbs nmethod size heuristics") \
2718 \
2719 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2720 "Manually make GC thread crash then dump java stack trace; " \
2721 "Test only") \
2722 \
2723 /* compilation */ \
2724 product(bool, UseCompiler, true, \
2725 "use compilation") \
2726 \
2727 develop(bool, TraceCompilationPolicy, false, \
2728 "Trace compilation policy") \
2729 \
2730 develop(bool, TimeCompilationPolicy, false, \
2731 "Time the compilation policy") \
2732 \
2733 product(bool, UseCounterDecay, true, \
2734 "adjust recompilation counters") \
2735 \
2736 develop(intx, CounterHalfLifeTime, 30, \
2737 "half-life time of invocation counters (in secs)") \
2738 \
2739 develop(intx, CounterDecayMinIntervalLength, 500, \
2740 "Min. ms. between invocation of CounterDecay") \
2741 \
2742 product(bool, AlwaysCompileLoopMethods, false, \
2743 "when using recompilation, never interpret methods " \
2744 "containing loops") \
2745 \
2746 product(bool, DontCompileHugeMethods, true, \
2747 "don't compile methods > HugeMethodLimit") \
2748 \
2749 /* Bytecode escape analysis estimation. */ \
2750 product(bool, EstimateArgEscape, true, \
2751 "Analyze bytecodes to estimate escape state of arguments") \
2752 \
2753 product(intx, BCEATraceLevel, 0, \
2754 "How much tracing to do of bytecode escape analysis estimates") \
2755 \
2756 product(intx, MaxBCEAEstimateLevel, 5, \
2757 "Maximum number of nested calls that are analyzed by BC EA.") \
2758 \
2759 product(intx, MaxBCEAEstimateSize, 150, \
2760 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2761 \
2762 product(intx, AllocatePrefetchStyle, 1, \
2763 "0 = no prefetch, " \
2764 "1 = prefetch instructions for each allocation, " \
2765 "2 = use TLAB watermark to gate allocation prefetch, " \
2766 "3 = use BIS instruction on Sparc for allocation prefetch") \
2767 \
2768 product(intx, AllocatePrefetchDistance, -1, \
2769 "Distance to prefetch ahead of allocation pointer") \
2770 \
2771 product(intx, AllocatePrefetchLines, 3, \
2772 "Number of lines to prefetch ahead of array allocation pointer") \
2773 \
2774 product(intx, AllocateInstancePrefetchLines, 1, \
2775 "Number of lines to prefetch ahead of instance allocation pointer") \
2776 \
2777 product(intx, AllocatePrefetchStepSize, 16, \
2778 "Step size in bytes of sequential prefetch instructions") \
2779 \
2780 product(intx, AllocatePrefetchInstr, 0, \
2781 "Prefetch instruction to prefetch ahead of allocation pointer") \
2782 \
2783 /* deoptimization */ \
2784 develop(bool, TraceDeoptimization, false, \
2785 "Trace deoptimization") \
2786 \
2787 develop(bool, DebugDeoptimization, false, \
2788 "Tracing various information while debugging deoptimization") \
2789 \
2790 product(intx, SelfDestructTimer, 0, \
2791 "Will cause VM to terminate after a given time (in minutes) " \
2792 "(0 means off)") \
2793 \
2794 product(intx, MaxJavaStackTraceDepth, 1024, \
2795 "Max. no. of lines in the stack trace for Java exceptions " \
2796 "(0 means all)") \
2797 \
2798 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
2799 "Guarantee a safepoint (at least) every so many milliseconds " \
2800 "(0 means none)")) \
2801 \
2802 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
2803 "Guarantee a safepoint (at least) every so many milliseconds " \
2804 "(0 means none)")) \
2805 \
2806 product(intx, SafepointTimeoutDelay, 10000, \
2807 "Delay in milliseconds for option SafepointTimeout") \
2808 \
2809 product(intx, NmethodSweepFraction, 16, \
2810 "Number of invocations of sweeper to cover all nmethods") \
2811 \
2812 product(intx, NmethodSweepCheckInterval, 5, \
2813 "Compilers wake up every n seconds to possibly sweep nmethods") \
2814 \
2815 notproduct(bool, LogSweeper, false, \
2816 "Keep a ring buffer of sweeper activity") \
2817 \
2818 notproduct(intx, SweeperLogEntries, 1024, \
2819 "Number of records in the ring buffer of sweeper activity") \
2820 \
2821 notproduct(intx, MemProfilingInterval, 500, \
2822 "Time between each invocation of the MemProfiler") \
2823 \
2824 develop(intx, MallocCatchPtr, -1, \
2825 "Hit breakpoint when mallocing/freeing this pointer") \
2826 \
2827 notproduct(intx, AssertRepeat, 1, \
2828 "number of times to evaluate expression in assert " \
2829 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2830 \
2831 notproduct(ccstrlist, SuppressErrorAt, "", \
2832 "List of assertions (file:line) to muzzle") \
2833 \
2834 notproduct(uintx, HandleAllocationLimit, 1024, \
2835 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2836 "is used") \
2837 \
2838 develop(uintx, TotalHandleAllocationLimit, 1024, \
2839 "Threshold for total handle allocation when " \
2840 "+TraceHandleAllocation is used") \
2841 \
2842 develop(intx, StackPrintLimit, 100, \
2843 "number of stack frames to print in VM-level stack dump") \
2844 \
2845 notproduct(intx, MaxElementPrintSize, 256, \
2846 "maximum number of elements to print") \
2847 \
2848 notproduct(intx, MaxSubklassPrintSize, 4, \
2849 "maximum number of subklasses to print when printing klass") \
2850 \
2851 product(intx, MaxInlineLevel, 9, \
2852 "maximum number of nested calls that are inlined") \
2853 \
2854 product(intx, MaxRecursiveInlineLevel, 1, \
2855 "maximum number of nested recursive calls that are inlined") \
2856 \
2857 product_pd(intx, InlineSmallCode, \
2858 "Only inline already compiled methods if their code size is " \
2859 "less than this") \
2860 \
2861 product(intx, MaxInlineSize, 35, \
2862 "maximum bytecode size of a method to be inlined") \
2863 \
2864 product_pd(intx, FreqInlineSize, \
2865 "maximum bytecode size of a frequent method to be inlined") \
2866 \
2867 product(intx, MaxTrivialSize, 6, \
2868 "maximum bytecode size of a trivial method to be inlined") \
2869 \
2870 product(intx, MinInliningThreshold, 250, \
2871 "min. invocation count a method needs to have to be inlined") \
2872 \
2873 develop(intx, MethodHistogramCutoff, 100, \
2874 "cutoff value for method invoc. histogram (+CountCalls)") \
2875 \
2876 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
2877 "# of interpreted methods to show in profile") \
2878 \
2879 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
2880 "# of compiled methods to show in profile") \
2881 \
2882 develop(intx, ProfilerNumberOfStubMethods, 25, \
2883 "# of stub methods to show in profile") \
2884 \
2885 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
2886 "# of runtime stub nodes to show in profile") \
2887 \
2888 product(intx, ProfileIntervalsTicks, 100, \
2889 "# of ticks between printing of interval profile " \
2890 "(+ProfileIntervals)") \
2891 \
2892 notproduct(intx, ScavengeALotInterval, 1, \
2893 "Interval between which scavenge will occur with +ScavengeALot") \
2894 \
2895 notproduct(intx, FullGCALotInterval, 1, \
2896 "Interval between which full gc will occur with +FullGCALot") \
2897 \
2898 notproduct(intx, FullGCALotStart, 0, \
2899 "For which invocation to start FullGCAlot") \
2900 \
2901 notproduct(intx, FullGCALotDummies, 32*K, \
2902 "Dummy object allocated with +FullGCALot, forcing all objects " \
2903 "to move") \
2904 \
2905 develop(intx, DontYieldALotInterval, 10, \
2906 "Interval between which yields will be dropped (milliseconds)") \
2907 \
2908 develop(intx, MinSleepInterval, 1, \
2909 "Minimum sleep() interval (milliseconds) when " \
2910 "ConvertSleepToYield is off (used for SOLARIS)") \
2911 \
2912 develop(intx, ProfilerPCTickThreshold, 15, \
2913 "Number of ticks in a PC buckets to be a hotspot") \
2914 \
2915 notproduct(intx, DeoptimizeALotInterval, 5, \
2916 "Number of exits until DeoptimizeALot kicks in") \
2917 \
2918 notproduct(intx, ZombieALotInterval, 5, \
2919 "Number of exits until ZombieALot kicks in") \
2920 \
2921 develop(bool, StressNonEntrant, false, \
2922 "Mark nmethods non-entrant at registration") \
2923 \
2924 diagnostic(intx, MallocVerifyInterval, 0, \
2925 "if non-zero, verify C heap after every N calls to " \
2926 "malloc/realloc/free") \
2927 \
2928 diagnostic(intx, MallocVerifyStart, 0, \
2929 "if non-zero, start verifying C heap after Nth call to " \
2930 "malloc/realloc/free") \
2931 \
2932 product(intx, TypeProfileWidth, 2, \
2933 "number of receiver types to record in call/cast profile") \
2934 \
2935 develop(intx, BciProfileWidth, 2, \
2936 "number of return bci's to record in ret profile") \
2937 \
2938 product(intx, PerMethodRecompilationCutoff, 400, \
2939 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
2940 \
2941 product(intx, PerBytecodeRecompilationCutoff, 200, \
2942 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
2943 \
2944 product(intx, PerMethodTrapLimit, 100, \
2945 "Limit on traps (of one kind) in a method (includes inlines)") \
2946 \
2947 product(intx, PerBytecodeTrapLimit, 4, \
2948 "Limit on traps (of one kind) at a particular BCI") \
2949 \
2950 develop(intx, InlineFrequencyRatio, 20, \
2951 "Ratio of call site execution to caller method invocation") \
2952 \
2953 develop_pd(intx, InlineFrequencyCount, \
2954 "Count of call site execution necessary to trigger frequent " \
2955 "inlining") \
2956 \
2957 develop(intx, InlineThrowCount, 50, \
2958 "Force inlining of interpreted methods that throw this often") \
2959 \
2960 develop(intx, InlineThrowMaxSize, 200, \
2961 "Force inlining of throwing methods smaller than this") \
2962 \
2963 develop(intx, ProfilerNodeSize, 1024, \
2964 "Size in K to allocate for the Profile Nodes of each thread") \
2965 \
2966 product_pd(intx, PreInflateSpin, \
2967 "Number of times to spin wait before inflation") \
2968 \
2969 /* gc parameters */ \
2970 product(uintx, InitialHeapSize, 0, \
2971 "Initial heap size (in bytes); zero means OldSize + NewSize") \
2972 \
2973 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
2974 "Maximum heap size (in bytes)") \
2975 \
2976 product(uintx, OldSize, ScaleForWordSize(4*M), \
2977 "Initial tenured generation size (in bytes)") \
2978 \
2979 product(uintx, NewSize, ScaleForWordSize(1*M), \
2980 "Initial new generation size (in bytes)") \
2981 \
2982 product(uintx, MaxNewSize, max_uintx, \
2983 "Maximum new generation size (in bytes), max_uintx means set " \
2984 "ergonomically") \
2985 \
2986 product(uintx, PretenureSizeThreshold, 0, \
2987 "Maximum size in bytes of objects allocated in DefNew " \
2988 "generation; zero means no maximum") \
2989 \
2990 product(uintx, TLABSize, 0, \
2991 "Starting TLAB size (in bytes); zero means set ergonomically") \
2992 \
2993 product(uintx, MinTLABSize, 2*K, \
2994 "Minimum allowed TLAB size (in bytes)") \
2995 \
2996 product(uintx, TLABAllocationWeight, 35, \
2997 "Allocation averaging weight") \
2998 \
2999 product(uintx, TLABWasteTargetPercent, 1, \
3000 "Percentage of Eden that can be wasted") \
3001 \
3002 product(uintx, TLABRefillWasteFraction, 64, \
3003 "Max TLAB waste at a refill (internal fragmentation)") \
3004 \
3005 product(uintx, TLABWasteIncrement, 4, \
3006 "Increment allowed waste at slow allocation") \
3007 \
3008 product(intx, SurvivorRatio, 8, \
3009 "Ratio of eden/survivor space size") \
3010 \
3011 product(intx, NewRatio, 2, \
3012 "Ratio of new/old generation sizes") \
3013 \
3014 product_pd(uintx, NewSizeThreadIncrease, \
3015 "Additional size added to desired new generation size per " \
3016 "non-daemon thread (in bytes)") \
3017 \
3018 product_pd(uintx, PermSize, \
3019 "Initial size of permanent generation (in bytes)") \
3020 \
3021 product_pd(uintx, MaxPermSize, \
3022 "Maximum size of permanent generation (in bytes)") \
3023 \
3024 product(uintx, MinHeapFreeRatio, 40, \
3025 "Min percentage of heap free after GC to avoid expansion") \
3026 \
3027 product(uintx, MaxHeapFreeRatio, 70, \
3028 "Max percentage of heap free after GC to avoid shrinking") \
3029 \
3030 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3031 "Number of milliseconds per MB of free space in the heap") \
3032 \
3033 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3034 "Min change in heap space due to GC (in bytes)") \
3035 \
3036 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \
3037 "Min expansion of permanent heap (in bytes)") \
3038 \
3039 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \
3040 "Max expansion of permanent heap without full GC (in bytes)") \
3041 \
3042 product(intx, QueuedAllocationWarningCount, 0, \
3043 "Number of times an allocation that queues behind a GC " \
3044 "will retry before printing a warning") \
3045 \
3046 diagnostic(uintx, VerifyGCStartAt, 0, \
3047 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3048 \
3049 diagnostic(intx, VerifyGCLevel, 0, \
3050 "Generation level at which to start +VerifyBefore/AfterGC") \
3051 \
3052 product(intx, MaxTenuringThreshold, 15, \
3053 "Maximum value for tenuring threshold") \
3054 \
3055 product(intx, InitialTenuringThreshold, 7, \
3056 "Initial value for tenuring threshold") \
3057 \
3058 product(intx, TargetSurvivorRatio, 50, \
3059 "Desired percentage of survivor space used after scavenge") \
3060 \
3061 product(uintx, MarkSweepDeadRatio, 5, \
3062 "Percentage (0-100) of the old gen allowed as dead wood." \
3063 "Serial mark sweep treats this as both the min and max value." \
3064 "CMS uses this value only if it falls back to mark sweep." \
3065 "Par compact uses a variable scale based on the density of the" \
3066 "generation and treats this as the max value when the heap is" \
3067 "either completely full or completely empty. Par compact also" \
3068 "has a smaller default value; see arguments.cpp.") \
3069 \
3070 product(uintx, PermMarkSweepDeadRatio, 20, \
3071 "Percentage (0-100) of the perm gen allowed as dead wood." \
3072 "See MarkSweepDeadRatio for collector-specific comments.") \
3073 \
3074 product(intx, MarkSweepAlwaysCompactCount, 4, \
3075 "How often should we fully compact the heap (ignoring the dead " \
3076 "space parameters)") \
3077 \
3078 product(intx, PrintCMSStatistics, 0, \
3079 "Statistics for CMS") \
3080 \
3081 product(bool, PrintCMSInitiationStatistics, false, \
3082 "Statistics for initiating a CMS collection") \
3083 \
3084 product(intx, PrintFLSStatistics, 0, \
3085 "Statistics for CMS' FreeListSpace") \
3086 \
3087 product(intx, PrintFLSCensus, 0, \
3088 "Census for CMS' FreeListSpace") \
3089 \
3090 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3091 "Delay in ms between expansion and allocation") \
3092 \
3093 product(intx, DeferThrSuspendLoopCount, 4000, \
3094 "(Unstable) Number of times to iterate in safepoint loop " \
3095 " before blocking VM threads ") \
3096 \
3097 product(intx, DeferPollingPageLoopCount, -1, \
3098 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3099 "before changing safepoint polling page to RO ") \
3100 \
3101 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3102 \
3103 product(bool, PSChunkLargeArrays, true, \
3104 "true: process large arrays in chunks") \
3105 \
3106 product(uintx, GCDrainStackTargetSize, 64, \
3107 "how many entries we'll try to leave on the stack during " \
3108 "parallel GC") \
3109 \
3110 /* stack parameters */ \
3111 product_pd(intx, StackYellowPages, \
3112 "Number of yellow zone (recoverable overflows) pages") \
3113 \
3114 product_pd(intx, StackRedPages, \
3115 "Number of red zone (unrecoverable overflows) pages") \
3116 \
3117 product_pd(intx, StackShadowPages, \
3118 "Number of shadow zone (for overflow checking) pages" \
3119 " this should exceed the depth of the VM and native call stack") \
3120 \
3121 product_pd(intx, ThreadStackSize, \
3122 "Thread Stack Size (in Kbytes)") \
3123 \
3124 product_pd(intx, VMThreadStackSize, \
3125 "Non-Java Thread Stack Size (in Kbytes)") \
3126 \
3127 product_pd(intx, CompilerThreadStackSize, \
3128 "Compiler Thread Stack Size (in Kbytes)") \
3129 \
3130 develop_pd(uintx, JVMInvokeMethodSlack, \
3131 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3132 \
3133 product(uintx, ThreadSafetyMargin, 50*M, \
3134 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3135 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3136 "disable this feature") \
3137 \
3138 /* code cache parameters */ \
3139 develop(uintx, CodeCacheSegmentSize, 64, \
3140 "Code cache segment size (in bytes) - smallest unit of " \
3141 "allocation") \
3142 \
3143 develop_pd(intx, CodeEntryAlignment, \
3144 "Code entry alignment for generated code (in bytes)") \
3145 \
3146 product_pd(intx, OptoLoopAlignment, \
3147 "Align inner loops to zero relative to this modulus") \
3148 \
3149 product_pd(uintx, InitialCodeCacheSize, \
3150 "Initial code cache size (in bytes)") \
3151 \
3152 product_pd(uintx, ReservedCodeCacheSize, \
3153 "Reserved code cache size (in bytes) - maximum code cache size") \
3154 \
3155 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3156 "When less than X space left, we stop compiling.") \
3157 \
3158 product_pd(uintx, CodeCacheExpansionSize, \
3159 "Code cache expansion size (in bytes)") \
3160 \
3161 develop_pd(uintx, CodeCacheMinBlockLength, \
3162 "Minimum number of segments in a code cache block.") \
3163 \
3164 notproduct(bool, ExitOnFullCodeCache, false, \
3165 "Exit the VM if we fill the code cache.") \
3166 \
3167 product(bool, UseCodeCacheFlushing, true, \
3168 "Attempt to clean the code cache before shutting off compiler") \
3169 \
3170 product(intx, MinCodeCacheFlushingInterval, 30, \
3171 "Min number of seconds between code cache cleaning sessions") \
3172 \
3173 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \
3174 "When less than X space left, start code cache cleaning") \
3175 \
3176 /* interpreter debugging */ \
3177 develop(intx, BinarySwitchThreshold, 5, \
3178 "Minimal number of lookupswitch entries for rewriting to binary " \
3179 "switch") \
3180 \
3181 develop(intx, StopInterpreterAt, 0, \
3182 "Stops interpreter execution at specified bytecode number") \
3183 \
3184 develop(intx, TraceBytecodesAt, 0, \
3185 "Traces bytecodes starting with specified bytecode number") \
3186 \
3187 /* compiler interface */ \
3188 develop(intx, CIStart, 0, \
3189 "the id of the first compilation to permit") \
3190 \
3191 develop(intx, CIStop, -1, \
3192 "the id of the last compilation to permit") \
3193 \
3194 develop(intx, CIStartOSR, 0, \
3195 "the id of the first osr compilation to permit " \
3196 "(CICountOSR must be on)") \
3197 \
3198 develop(intx, CIStopOSR, -1, \
3199 "the id of the last osr compilation to permit " \
3200 "(CICountOSR must be on)") \
3201 \
3202 develop(intx, CIBreakAtOSR, -1, \
3203 "id of osr compilation to break at") \
3204 \
3205 develop(intx, CIBreakAt, -1, \
3206 "id of compilation to break at") \
3207 \
3208 product(ccstrlist, CompileOnly, "", \
3209 "List of methods (pkg/class.name) to restrict compilation to") \
3210 \
3211 product(ccstr, CompileCommandFile, NULL, \
3212 "Read compiler commands from this file [.hotspot_compiler]") \
3213 \
3214 product(ccstrlist, CompileCommand, "", \
3215 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3216 \
3217 product(bool, CICompilerCountPerCPU, false, \
3218 "1 compiler thread for log(N CPUs)") \
3219 \
3220 develop(intx, CIFireOOMAt, -1, \
3221 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3222 "(non-negative value throws OOM after this many CI accesses " \
3223 "in each compile)") \
3224 \
3225 notproduct(bool, CIObjectFactoryVerify, false, \
3226 "enable potentially expensive verification in ciObjectFactory") \
3227 \
3228 /* Priorities */ \
3229 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3230 \
3231 product(intx, ThreadPriorityPolicy, 0, \
3232 "0 : Normal. "\
3233 " VM chooses priorities that are appropriate for normal "\
3234 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3235 " to normal native priority. Java priorities below NORM_PRIORITY"\
3236 " map to lower native priority values. On Windows applications"\
3237 " are allowed to use higher native priorities. However, with "\
3238 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
3239 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
3240 " interfere with system threads. On Linux thread priorities "\
3241 " are ignored because the OS does not support static priority "\
3242 " in SCHED_OTHER scheduling class which is the only choice for"\
3243 " non-root, non-realtime applications. "\
3244 "1 : Aggressive. "\
3245 " Java thread priorities map over to the entire range of "\
3246 " native thread priorities. Higher Java thread priorities map "\
3247 " to higher native thread priorities. This policy should be "\
3248 " used with care, as sometimes it can cause performance "\
3249 " degradation in the application and/or the entire system. On "\
3250 " Linux this policy requires root privilege.") \
3251 \
3252 product(bool, ThreadPriorityVerbose, false, \
3253 "Print priority changes") \
3254 \
3255 product(intx, DefaultThreadPriority, -1, \
3256 "The native priority at which threads run if not elsewhere " \
3257 "specified (-1 means no change)") \
3258 \
3259 product(intx, CompilerThreadPriority, -1, \
3260 "The native priority at which compiler threads should run " \
3261 "(-1 means no change)") \
3262 \
3263 product(intx, VMThreadPriority, -1, \
3264 "The native priority at which the VM thread should run " \
3265 "(-1 means no change)") \
3266 \
3267 product(bool, CompilerThreadHintNoPreempt, true, \
3268 "(Solaris only) Give compiler threads an extra quanta") \
3269 \
3270 product(bool, VMThreadHintNoPreempt, false, \
3271 "(Solaris only) Give VM thread an extra quanta") \
3272 \
3273 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3274 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3275 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3276 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3277 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3278 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3279 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3280 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3281 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3282 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3283 \
3284 experimental(bool, UseCriticalJavaThreadPriority, false, \
3285 "Java thread priority 10 maps to critical scheduling priority") \
3286 \
3287 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3288 "Compiler thread(s) run at critical scheduling priority") \
3289 \
3290 experimental(bool, UseCriticalCMSThreadPriority, false, \
3291 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3292 \
3293 /* compiler debugging */ \
3294 notproduct(intx, CompileTheWorldStartAt, 1, \
3295 "First class to consider when using +CompileTheWorld") \
3296 \
3297 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3298 "Last class to consider when using +CompileTheWorld") \
3299 \
3300 develop(intx, NewCodeParameter, 0, \
3301 "Testing Only: Create a dedicated integer parameter before " \
3302 "putback") \
3303 \
3304 /* new oopmap storage allocation */ \
3305 develop(intx, MinOopMapAllocation, 8, \
3306 "Minimum number of OopMap entries in an OopMapSet") \
3307 \
3308 /* Background Compilation */ \
3309 develop(intx, LongCompileThreshold, 50, \
3310 "Used with +TraceLongCompiles") \
3311 \
3312 product(intx, StarvationMonitorInterval, 200, \
3313 "Pause between each check in ms") \
3314 \
3315 /* recompilation */ \
3316 product_pd(intx, CompileThreshold, \
3317 "number of interpreted method invocations before (re-)compiling") \
3318 \
3319 product_pd(intx, BackEdgeThreshold, \
3320 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3321 \
3322 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3323 "Interpreter (tier 0) invocation notification frequency.") \
3324 \
3325 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3326 "C1 without MDO (tier 2) invocation notification frequency.") \
3327 \
3328 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3329 "C1 with MDO profiling (tier 3) invocation notification " \
3330 "frequency.") \
3331 \
3332 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3333 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3334 \
3335 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3336 "Interpreter (tier 0) invocation notification frequency.") \
3337 \
3338 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3339 "C1 without MDO (tier 2) invocation notification frequency.") \
3340 \
3341 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3342 "C1 with MDO profiling (tier 3) invocation notification " \
3343 "frequency.") \
3344 \
3345 product(intx, Tier2CompileThreshold, 0, \
3346 "threshold at which tier 2 compilation is invoked") \
3347 \
3348 product(intx, Tier2BackEdgeThreshold, 0, \
3349 "Back edge threshold at which tier 2 compilation is invoked") \
3350 \
3351 product(intx, Tier3InvocationThreshold, 200, \
3352 "Compile if number of method invocations crosses this " \
3353 "threshold") \
3354 \
3355 product(intx, Tier3MinInvocationThreshold, 100, \
3356 "Minimum invocation to compile at tier 3") \
3357 \
3358 product(intx, Tier3CompileThreshold, 2000, \
3359 "Threshold at which tier 3 compilation is invoked (invocation " \
3360 "minimum must be satisfied.") \
3361 \
3362 product(intx, Tier3BackEdgeThreshold, 60000, \
3363 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3364 \
3365 product(intx, Tier4InvocationThreshold, 5000, \
3366 "Compile if number of method invocations crosses this " \
3367 "threshold") \
3368 \
3369 product(intx, Tier4MinInvocationThreshold, 600, \
3370 "Minimum invocation to compile at tier 4") \
3371 \
3372 product(intx, Tier4CompileThreshold, 15000, \
3373 "Threshold at which tier 4 compilation is invoked (invocation " \
3374 "minimum must be satisfied.") \
3375 \
3376 product(intx, Tier4BackEdgeThreshold, 40000, \
3377 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3378 \
3379 product(intx, Tier3DelayOn, 5, \
3380 "If C2 queue size grows over this amount per compiler thread " \
3381 "stop compiling at tier 3 and start compiling at tier 2") \
3382 \
3383 product(intx, Tier3DelayOff, 2, \
3384 "If C2 queue size is less than this amount per compiler thread " \
3385 "allow methods compiled at tier 2 transition to tier 3") \
3386 \
3387 product(intx, Tier3LoadFeedback, 5, \
3388 "Tier 3 thresholds will increase twofold when C1 queue size " \
3389 "reaches this amount per compiler thread") \
3390 \
3391 product(intx, Tier4LoadFeedback, 3, \
3392 "Tier 4 thresholds will increase twofold when C2 queue size " \
3393 "reaches this amount per compiler thread") \
3394 \
3395 product(intx, TieredCompileTaskTimeout, 50, \
3396 "Kill compile task if method was not used within " \
3397 "given timeout in milliseconds") \
3398 \
3399 product(intx, TieredStopAtLevel, 4, \
3400 "Stop at given compilation level") \
3401 \
3402 product(intx, Tier0ProfilingStartPercentage, 200, \
3403 "Start profiling in interpreter if the counters exceed tier 3" \
3404 "thresholds by the specified percentage") \
3405 \
3406 product(intx, TieredRateUpdateMinTime, 1, \
3407 "Minimum rate sampling interval (in milliseconds)") \
3408 \
3409 product(intx, TieredRateUpdateMaxTime, 25, \
3410 "Maximum rate sampling interval (in milliseconds)") \
3411 \
3412 product_pd(bool, TieredCompilation, \
3413 "Enable tiered compilation") \
3414 \
3415 product(bool, PrintTieredEvents, false, \
3416 "Print tiered events notifications") \
3417 \
3418 product_pd(intx, OnStackReplacePercentage, \
3419 "NON_TIERED number of method invocations/branches (expressed as %"\
3420 "of CompileThreshold) before (re-)compiling OSR code") \
3421 \
3422 product(intx, InterpreterProfilePercentage, 33, \
3423 "NON_TIERED number of method invocations/branches (expressed as %"\
3424 "of CompileThreshold) before profiling in the interpreter") \
3425 \
3426 develop(intx, MaxRecompilationSearchLength, 10, \
3427 "max. # frames to inspect searching for recompilee") \
3428 \
3429 develop(intx, MaxInterpretedSearchLength, 3, \
3430 "max. # interp. frames to skip when searching for recompilee") \
3431 \
3432 develop(intx, DesiredMethodLimit, 8000, \
3433 "desired max. method size (in bytecodes) after inlining") \
3434 \
3435 develop(intx, HugeMethodLimit, 8000, \
3436 "don't compile methods larger than this if " \
3437 "+DontCompileHugeMethods") \
3438 \
3439 /* New JDK 1.4 reflection implementation */ \
3440 \
3441 develop(bool, UseNewReflection, true, \
3442 "Temporary flag for transition to reflection based on dynamic " \
3443 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3444 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3445 "changes were needed") \
3446 \
3447 develop(bool, VerifyReflectionBytecodes, false, \
3448 "Force verification of 1.4 reflection bytecodes. Does not work " \
3449 "in situations like that described in 4486457 or for " \
3450 "constructors generated for serialization, so can not be enabled "\
3451 "in product.") \
3452 \
3453 product(bool, ReflectionWrapResolutionErrors, true, \
3454 "Temporary flag for transition to AbstractMethodError wrapped " \
3455 "in InvocationTargetException. See 6531596") \
3456 \
3457 \
3458 develop(intx, FastSuperclassLimit, 8, \
3459 "Depth of hardwired instanceof accelerator array") \
3460 \
3461 /* Properties for Java libraries */ \
3462 \
3463 product(uintx, MaxDirectMemorySize, 0, \
3464 "Maximum total size of NIO direct-buffer allocations") \
3465 \
3466 /* temporary developer defined flags */ \
3467 \
3468 diagnostic(bool, UseNewCode, false, \
3469 "Testing Only: Use the new version while testing") \
3470 \
3471 diagnostic(bool, UseNewCode2, false, \
3472 "Testing Only: Use the new version while testing") \
3473 \
3474 diagnostic(bool, UseNewCode3, false, \
3475 "Testing Only: Use the new version while testing") \
3476 \
3477 /* flags for performance data collection */ \
3478 \
3479 product(bool, UsePerfData, falseInEmbedded, \
3480 "Flag to disable jvmstat instrumentation for performance testing" \
3481 "and problem isolation purposes.") \
3482 \
3483 product(bool, PerfDataSaveToFile, false, \
3484 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3485 \
3486 product(ccstr, PerfDataSaveFile, NULL, \
3487 "Save PerfData memory to the specified absolute pathname," \
3488 "%p in the file name if present will be replaced by pid") \
3489 \
3490 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3491 "Data sampling interval in milliseconds") \
3492 \
3493 develop(bool, PerfTraceDataCreation, false, \
3494 "Trace creation of Performance Data Entries") \
3495 \
3496 develop(bool, PerfTraceMemOps, false, \
3497 "Trace PerfMemory create/attach/detach calls") \
3498 \
3499 product(bool, PerfDisableSharedMem, false, \
3500 "Store performance data in standard memory") \
3501 \
3502 product(intx, PerfDataMemorySize, 32*K, \
3503 "Size of performance data memory region. Will be rounded " \
3504 "up to a multiple of the native os page size.") \
3505 \
3506 product(intx, PerfMaxStringConstLength, 1024, \
3507 "Maximum PerfStringConstant string length before truncation") \
3508 \
3509 product(bool, PerfAllowAtExitRegistration, false, \
3510 "Allow registration of atexit() methods") \
3511 \
3512 product(bool, PerfBypassFileSystemCheck, false, \
3513 "Bypass Win32 file system criteria checks (Windows Only)") \
3514 \
3515 product(intx, UnguardOnExecutionViolation, 0, \
3516 "Unguard page and retry on no-execute fault (Win32 only)" \
3517 "0=off, 1=conservative, 2=aggressive") \
3518 \
3519 /* Serviceability Support */ \
3520 \
3521 product(bool, ManagementServer, false, \
3522 "Create JMX Management Server") \
3523 \
3524 product(bool, DisableAttachMechanism, false, \
3525 "Disable mechanism that allows tools to attach to this VM") \
3526 \
3527 product(bool, StartAttachListener, false, \
3528 "Always start Attach Listener at VM startup") \
3529 \
3530 manageable(bool, PrintConcurrentLocks, false, \
3531 "Print java.util.concurrent locks in thread dump") \
3532 \
3533 product(bool, TransmitErrorReport, false, \
3534 "Enable error report transmission on erroneous termination") \
3535 \
3536 product(ccstr, ErrorReportServer, NULL, \
3537 "Override built-in error report server address") \
3538 \
3539 /* Shared spaces */ \
3540 \
3541 product(bool, UseSharedSpaces, true, \
3542 "Use shared spaces in the permanent generation") \
3543 \
3544 product(bool, RequireSharedSpaces, false, \
3545 "Require shared spaces in the permanent generation") \
3546 \
3547 product(bool, DumpSharedSpaces, false, \
3548 "Special mode: JVM reads a class list, loads classes, builds " \
3549 "shared spaces, and dumps the shared spaces to a file to be " \
3550 "used in future JVM runs.") \
3551 \
3552 product(bool, PrintSharedSpaces, false, \
3553 "Print usage of shared spaces") \
3554 \
3555 product(uintx, SharedDummyBlockSize, 512*M, \
3556 "Size of dummy block used to shift heap addresses (in bytes)") \
3557 \
3558 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(13*M), \
3559 "Size of read-write space in permanent generation (in bytes)") \
3560 \
3561 product(uintx, SharedReadOnlySize, 10*M, \
3562 "Size of read-only space in permanent generation (in bytes)") \
3563 \
3564 product(uintx, SharedMiscDataSize, NOT_LP64(4*M) LP64_ONLY(5*M) NOT_PRODUCT(+1*M), \
3565 "Size of the shared data area adjacent to the heap (in bytes)") \
3566 \
3567 product(uintx, SharedMiscCodeSize, 4*M, \
3568 "Size of the shared code area adjacent to the heap (in bytes)") \
3569 \
3570 diagnostic(bool, SharedOptimizeColdStart, true, \
3571 "At dump time, order shared objects to achieve better " \
3572 "cold startup time.") \
3573 \
3574 develop(intx, SharedOptimizeColdStartPolicy, 2, \
3575 "Reordering policy for SharedOptimizeColdStart " \
3576 "0=favor classload-time locality, 1=balanced, " \
3577 "2=favor runtime locality") \
3578 \
3579 diagnostic(bool, SharedSkipVerify, false, \
3580 "Skip assert() and verify() which page-in unwanted shared " \
3581 "objects. ") \
3582 \
3583 diagnostic(bool, EnableInvokeDynamic, true, \
3584 "support JSR 292 (method handles, invokedynamic, " \
3585 "anonymous classes") \
3586 \
3587 diagnostic(bool, PrintMethodHandleStubs, false, \
3588 "Print generated stub code for method handles") \
3589 \
3590 develop(bool, TraceMethodHandles, false, \
3591 "trace internal method handle operations") \
3592 \
3593 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3594 "perform extra checks when constructing method handles") \
3595 \
3596 diagnostic(bool, ShowHiddenFrames, false, \
3597 "show method handle implementation frames (usually hidden)") \
3598 \
3599 experimental(bool, TrustFinalNonStaticFields, false, \
3600 "trust final non-static declarations for constant folding") \
3601 \
3602 develop(bool, TraceInvokeDynamic, false, \
3603 "trace internal invoke dynamic operations") \
3604 \
3605 diagnostic(bool, PauseAtStartup, false, \
3606 "Causes the VM to pause at startup time and wait for the pause " \
3607 "file to be removed (default: ./vm.paused.<pid>)") \
3608 \
3609 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3610 "The file to create and for whose removal to await when pausing " \
3611 "at startup. (default: ./vm.paused.<pid>)") \
3612 \
3613 diagnostic(bool, PauseAtExit, false, \
3614 "Pause and wait for keypress on exit if a debugger is attached") \
3615 \
3616 product(bool, ExtendedDTraceProbes, false, \
3617 "Enable performance-impacting dtrace probes") \
3618 \
3619 product(bool, DTraceMethodProbes, false, \
3620 "Enable dtrace probes for method-entry and method-exit") \
3621 \
3622 product(bool, DTraceAllocProbes, false, \
3623 "Enable dtrace probes for object allocation") \
3624 \
3625 product(bool, DTraceMonitorProbes, false, \
3626 "Enable dtrace probes for monitor events") \
3627 \
3628 product(bool, RelaxAccessControlCheck, false, \
3629 "Relax the access control checks in the verifier") \
3630 \
3631 diagnostic(bool, PrintDTraceDOF, false, \
3632 "Print the DTrace DOF passed to the system for JSDT probes") \
3633 \
3634 product(uintx, StringTableSize, NOT_LP64(1009) LP64_ONLY(60013), \
3635 "Number of buckets in the interned String table") \
3636 \
3637 product(bool, UseVMInterruptibleIO, false, \
3638 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3639 "EINTR for I/O operations results in OS_INTRPT. The default value"\
3640 " of this flag is true for JDK 6 and earlier") \
3641 \
3642 product(bool, AllowNonVirtualCalls, false, \
3643 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3644 \
3645 diagnostic(bool, WhiteBoxAPI, false, \
3646 "Enable internal testing APIs") \
3647 \
3648 product(bool, PrintGCCause, true, \
3649 "Include GC cause in GC logging") \
3650 \
3651 experimental(uintx, ArrayAllocatorMallocLimit, \
3652 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
3653 "Allocation less than this value will be allocated " \
3654 "using malloc. Larger allocations will use mmap.") \
3655 \
3656 product(bool, EnableTracing, false, \
3657 "Enable event-based tracing") \
3658 product(bool, UseLockedTracing, false, \
3659 "Use locked-tracing when doing event-based tracing")
3660
3661 /*
3662 * Macros for factoring of globals
3663 */
3664
3665 // Interface macros
3666 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3667 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3668 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3669 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3670 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3671 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3672 #ifdef PRODUCT
3673 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
3674 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
3675 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3676 #else
3677 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3678 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3679 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3680 #endif
3681 // Special LP64 flags, product only needed for now.
3682 #ifdef _LP64
3683 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3684 #else
3685 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3686 #endif // _LP64
3687
3688 // Implementation macros
3689 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3690 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3691 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3692 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3693 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3694 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3695 #ifdef PRODUCT
3696 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3697 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
3698 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3699 #else
3700 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3701 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3702 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3703 #endif
3704 #ifdef _LP64
3705 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3706 #else
3707 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3708 #endif // _LP64
3709
3710 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)
3711
3712 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3713
3714 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3715
3716 // Extensions
3717
3718 #include "runtime/globals_ext.hpp"
3719
3720 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP