1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #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_aix
65 # include "globals_aix.hpp"
66 #endif
67 #ifdef TARGET_OS_FAMILY_bsd
68 # include "globals_bsd.hpp"
69 #endif
70 #ifdef TARGET_OS_ARCH_linux_x86
71 # include "globals_linux_x86.hpp"
72 #endif
73 #ifdef TARGET_OS_ARCH_linux_sparc
74 # include "globals_linux_sparc.hpp"
75 #endif
76 #ifdef TARGET_OS_ARCH_linux_zero
77 # include "globals_linux_zero.hpp"
78 #endif
79 #ifdef TARGET_OS_ARCH_solaris_x86
80 # include "globals_solaris_x86.hpp"
81 #endif
82 #ifdef TARGET_OS_ARCH_solaris_sparc
83 # include "globals_solaris_sparc.hpp"
84 #endif
85 #ifdef TARGET_OS_ARCH_windows_x86
86 # include "globals_windows_x86.hpp"
87 #endif
88 #ifdef TARGET_OS_ARCH_linux_arm
89 # include "globals_linux_arm.hpp"
90 #endif
91 #ifdef TARGET_OS_ARCH_linux_ppc
92 # include "globals_linux_ppc.hpp"
93 #endif
94 #ifdef TARGET_OS_ARCH_aix_ppc
95 # include "globals_aix_ppc.hpp"
96 #endif
97 #ifdef TARGET_OS_ARCH_bsd_x86
98 # include "globals_bsd_x86.hpp"
99 #endif
100 #ifdef TARGET_OS_ARCH_bsd_zero
101 # include "globals_bsd_zero.hpp"
102 #endif
103 #ifdef COMPILER1
104 #ifdef TARGET_ARCH_x86
105 # include "c1_globals_x86.hpp"
106 #endif
107 #ifdef TARGET_ARCH_sparc
108 # include "c1_globals_sparc.hpp"
109 #endif
110 #ifdef TARGET_ARCH_arm
111 # include "c1_globals_arm.hpp"
112 #endif
113 #ifdef TARGET_ARCH_ppc
114 # include "c1_globals_ppc.hpp"
115 #endif
116 #ifdef TARGET_OS_FAMILY_linux
117 # include "c1_globals_linux.hpp"
118 #endif
119 #ifdef TARGET_OS_FAMILY_solaris
120 # include "c1_globals_solaris.hpp"
121 #endif
122 #ifdef TARGET_OS_FAMILY_windows
123 # include "c1_globals_windows.hpp"
124 #endif
125 #ifdef TARGET_OS_FAMILY_aix
126 # include "c1_globals_aix.hpp"
127 #endif
128 #ifdef TARGET_OS_FAMILY_bsd
129 # include "c1_globals_bsd.hpp"
130 #endif
131 #endif
132 #ifdef COMPILER2
133 #ifdef TARGET_ARCH_x86
134 # include "c2_globals_x86.hpp"
135 #endif
136 #ifdef TARGET_ARCH_sparc
137 # include "c2_globals_sparc.hpp"
138 #endif
139 #ifdef TARGET_ARCH_arm
140 # include "c2_globals_arm.hpp"
141 #endif
142 #ifdef TARGET_ARCH_ppc
143 # include "c2_globals_ppc.hpp"
144 #endif
145 #ifdef TARGET_OS_FAMILY_linux
146 # include "c2_globals_linux.hpp"
147 #endif
148 #ifdef TARGET_OS_FAMILY_solaris
149 # include "c2_globals_solaris.hpp"
150 #endif
151 #ifdef TARGET_OS_FAMILY_windows
152 # include "c2_globals_windows.hpp"
153 #endif
154 #ifdef TARGET_OS_FAMILY_aix
155 # include "c2_globals_aix.hpp"
156 #endif
157 #ifdef TARGET_OS_FAMILY_bsd
158 # include "c2_globals_bsd.hpp"
159 #endif
160 #endif
161 #ifdef SHARK
162 #ifdef TARGET_ARCH_zero
163 # include "shark_globals_zero.hpp"
164 #endif
165 #endif
166
167 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
168 define_pd_global(bool, BackgroundCompilation, false);
169 define_pd_global(bool, UseTLAB, false);
170 define_pd_global(bool, CICompileOSR, false);
171 define_pd_global(bool, UseTypeProfile, false);
172 define_pd_global(bool, UseOnStackReplacement, false);
173 define_pd_global(bool, InlineIntrinsics, false);
174 define_pd_global(bool, PreferInterpreterNativeStubs, true);
175 define_pd_global(bool, ProfileInterpreter, false);
176 define_pd_global(bool, ProfileTraps, false);
177 define_pd_global(bool, TieredCompilation, false);
178
179 define_pd_global(intx, CompileThreshold, 0);
180 define_pd_global(intx, BackEdgeThreshold, 0);
181
182 define_pd_global(intx, OnStackReplacePercentage, 0);
183 define_pd_global(bool, ResizeTLAB, false);
184 define_pd_global(intx, FreqInlineSize, 0);
185 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
186 define_pd_global(intx, InlineClassNatives, true);
187 define_pd_global(intx, InlineUnsafeOps, true);
188 define_pd_global(intx, InitialCodeCacheSize, 160*K);
189 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
190 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
191 define_pd_global(intx, CodeCacheMinBlockLength, 1);
192 define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K);
193 define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M));
194 define_pd_global(bool, NeverActAsServerClassMachine, true);
195 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
196 #define CI_COMPILER_COUNT 0
197 #else
198
199 #ifdef COMPILER2
200 #define CI_COMPILER_COUNT 2
201 #else
202 #define CI_COMPILER_COUNT 1
203 #endif // COMPILER2
204
205 #endif // no compilers
206
207 // string type aliases used only in this file
208 typedef const char* ccstr;
209 typedef const char* ccstrlist; // represents string arguments which accumulate
210
211 struct Flag {
212 enum Flags {
213 // value origin
214 DEFAULT = 0,
215 COMMAND_LINE = 1,
216 ENVIRON_VAR = 2,
217 CONFIG_FILE = 3,
218 MANAGEMENT = 4,
219 ERGONOMIC = 5,
220 ATTACH_ON_DEMAND = 6,
221 INTERNAL = 7,
222
223 LAST_VALUE_ORIGIN = INTERNAL,
224 VALUE_ORIGIN_BITS = 4,
225 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
226
227 // flag kind
228 KIND_PRODUCT = 1 << 4,
229 KIND_MANAGEABLE = 1 << 5,
230 KIND_DIAGNOSTIC = 1 << 6,
231 KIND_EXPERIMENTAL = 1 << 7,
232 KIND_NOT_PRODUCT = 1 << 8,
233 KIND_DEVELOP = 1 << 9,
234 KIND_PLATFORM_DEPENDENT = 1 << 10,
235 KIND_READ_WRITE = 1 << 11,
236 KIND_C1 = 1 << 12,
237 KIND_C2 = 1 << 13,
238 KIND_ARCH = 1 << 14,
239 KIND_SHARK = 1 << 15,
240 KIND_LP64_PRODUCT = 1 << 16,
241 KIND_COMMERCIAL = 1 << 17,
242
243 KIND_MASK = ~VALUE_ORIGIN_MASK
244 };
245
246 const char* _type;
247 const char* _name;
248 void* _addr;
249 NOT_PRODUCT(const char* _doc;)
250 Flags _flags;
251
252 // points to all Flags static array
253 static Flag* flags;
254
255 // number of flags
256 static size_t numFlags;
257
258 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false);
259 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
260
261 void check_writable();
262
263 bool is_bool() const;
264 bool get_bool() const;
265 void set_bool(bool value);
266
267 bool is_intx() const;
268 intx get_intx() const;
269 void set_intx(intx value);
270
271 bool is_uintx() const;
272 uintx get_uintx() const;
273 void set_uintx(uintx value);
274
275 bool is_uint64_t() const;
276 uint64_t get_uint64_t() const;
277 void set_uint64_t(uint64_t value);
278
279 bool is_double() const;
280 double get_double() const;
281 void set_double(double value);
282
283 bool is_ccstr() const;
284 bool ccstr_accumulates() const;
285 ccstr get_ccstr() const;
286 void set_ccstr(ccstr value);
287
288 Flags get_origin();
289 void set_origin(Flags origin);
290
291 bool is_default();
292 bool is_ergonomic();
293 bool is_command_line();
294
295 bool is_product() const;
296 bool is_manageable() const;
297 bool is_diagnostic() const;
298 bool is_experimental() const;
299 bool is_notproduct() const;
300 bool is_develop() const;
301 bool is_read_write() const;
302 bool is_commercial() const;
303
304 bool is_constant_in_binary() const;
305
306 bool is_unlocker() const;
307 bool is_unlocked() const;
308 bool is_writeable() const;
309 bool is_external() const;
310
311 bool is_unlocker_ext() const;
312 bool is_unlocked_ext() const;
313 bool is_writeable_ext() const;
314 bool is_external_ext() const;
315
316 void get_locked_message(char*, int) const;
317 void get_locked_message_ext(char*, int) const;
318
319 void print_on(outputStream* st, bool withComments = false );
320 void print_kind(outputStream* st);
321 void print_as_flag(outputStream* st);
322 };
323
324 // debug flags control various aspects of the VM and are global accessible
325
326 // use FlagSetting to temporarily change some debug flag
327 // e.g. FlagSetting fs(DebugThisAndThat, true);
328 // restored to previous value upon leaving scope
329 class FlagSetting {
330 bool val;
331 bool* flag;
332 public:
333 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
334 ~FlagSetting() { *flag = val; }
335 };
336
337
338 class CounterSetting {
339 intx* counter;
340 public:
341 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
342 ~CounterSetting() { (*counter)--; }
343 };
344
345
346 class UIntFlagSetting {
347 uintx val;
348 uintx* flag;
349 public:
350 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
351 ~UIntFlagSetting() { *flag = val; }
352 };
353
354
355 class DoubleFlagSetting {
356 double val;
357 double* flag;
358 public:
359 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
360 ~DoubleFlagSetting() { *flag = val; }
361 };
362
363
364 class CommandLineFlags {
365 public:
366 static bool boolAt(char* name, size_t len, bool* value);
367 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
368 static bool boolAtPut(char* name, size_t len, bool* value, Flag::Flags origin);
369 static bool boolAtPut(char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
370
371 static bool intxAt(char* name, size_t len, intx* value);
372 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
373 static bool intxAtPut(char* name, size_t len, intx* value, Flag::Flags origin);
374 static bool intxAtPut(char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
375
376 static bool uintxAt(char* name, size_t len, uintx* value);
377 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
378 static bool uintxAtPut(char* name, size_t len, uintx* value, Flag::Flags origin);
379 static bool uintxAtPut(char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
380
381 static bool uint64_tAt(char* name, size_t len, uint64_t* value);
382 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
383 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, Flag::Flags origin);
384 static bool uint64_tAtPut(char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
385
386 static bool doubleAt(char* name, size_t len, double* value);
387 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
388 static bool doubleAtPut(char* name, size_t len, double* value, Flag::Flags origin);
389 static bool doubleAtPut(char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
390
391 static bool ccstrAt(char* name, size_t len, ccstr* value);
392 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
393 // Contract: Flag will make private copy of the incoming value.
394 // Outgoing value is always malloc-ed, and caller MUST call free.
395 static bool ccstrAtPut(char* name, size_t len, ccstr* value, Flag::Flags origin);
396 static bool ccstrAtPut(char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
397
398 // Returns false if name is not a command line flag.
399 static bool wasSetOnCmdline(const char* name, bool* value);
400 static void printSetFlags(outputStream* out);
401
402 static void printFlags(outputStream* out, bool withComments);
403
404 static void verify() PRODUCT_RETURN;
405 };
406
407 // use this for flags that are true by default in the debug version but
408 // false in the optimized version, and vice versa
409 #ifdef ASSERT
410 #define trueInDebug true
411 #define falseInDebug false
412 #else
413 #define trueInDebug false
414 #define falseInDebug true
415 #endif
416
417 // use this for flags that are true per default in the product build
418 // but false in development builds, and vice versa
419 #ifdef PRODUCT
420 #define trueInProduct true
421 #define falseInProduct false
422 #else
423 #define trueInProduct false
424 #define falseInProduct true
425 #endif
426
427 #ifdef JAVASE_EMBEDDED
428 #define falseInEmbedded false
429 #else
430 #define falseInEmbedded true
431 #endif
432
433 // develop flags are settable / visible only during development and are constant in the PRODUCT version
434 // product flags are always settable / visible
435 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
436
437 // A flag must be declared with one of the following types:
438 // bool, intx, uintx, ccstr.
439 // The type "ccstr" is an alias for "const char*" and is used
440 // only in this file, because the macrology requires single-token type names.
441
442 // Note: Diagnostic options not meant for VM tuning or for product modes.
443 // They are to be used for VM quality assurance or field diagnosis
444 // of VM bugs. They are hidden so that users will not be encouraged to
445 // try them as if they were VM ordinary execution options. However, they
446 // are available in the product version of the VM. Under instruction
447 // from support engineers, VM customers can turn them on to collect
448 // diagnostic information about VM problems. To use a VM diagnostic
449 // option, you must first specify +UnlockDiagnosticVMOptions.
450 // (This master switch also affects the behavior of -Xprintflags.)
451 //
452 // experimental flags are in support of features that are not
453 // part of the officially supported product, but are available
454 // for experimenting with. They could, for example, be performance
455 // features that may not have undergone full or rigorous QA, but which may
456 // help performance in some cases and released for experimentation
457 // by the community of users and developers. This flag also allows one to
458 // be able to build a fully supported product that nonetheless also
459 // ships with some unsupported, lightly tested, experimental features.
460 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
461 // UnlockExperimentalVMOptions flag, which allows the control and
462 // modification of the experimental flags.
463 //
464 // Nota bene: neither diagnostic nor experimental options should be used casually,
465 // and they are not supported on production loads, except under explicit
466 // direction from support engineers.
467 //
468 // manageable flags are writeable external product flags.
469 // They are dynamically writeable through the JDK management interface
470 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
471 // These flags are external exported interface (see CCC). The list of
472 // manageable flags can be queried programmatically through the management
473 // interface.
474 //
475 // A flag can be made as "manageable" only if
476 // - the flag is defined in a CCC as an external exported interface.
477 // - the VM implementation supports dynamic setting of the flag.
478 // This implies that the VM must *always* query the flag variable
479 // and not reuse state related to the flag state at any given time.
480 // - you want the flag to be queried programmatically by the customers.
481 //
482 // product_rw flags are writeable internal product flags.
483 // They are like "manageable" flags but for internal/private use.
484 // The list of product_rw flags are internal/private flags which
485 // may be changed/removed in a future release. It can be set
486 // through the management interface to get/set value
487 // when the name of flag is supplied.
488 //
489 // A flag can be made as "product_rw" only if
490 // - the VM implementation supports dynamic setting of the flag.
491 // This implies that the VM must *always* query the flag variable
492 // and not reuse state related to the flag state at any given time.
493 //
494 // Note that when there is a need to support develop flags to be writeable,
495 // it can be done in the same way as product_rw.
496
497 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
498 \
499 lp64_product(bool, UseCompressedOops, false, \
500 "Use 32-bit object references in 64-bit VM. " \
501 "lp64_product means flag is always constant in 32 bit VM") \
502 \
503 lp64_product(bool, UseCompressedClassPointers, false, \
504 "Use 32-bit class pointers in 64-bit VM. " \
505 "lp64_product means flag is always constant in 32 bit VM") \
506 \
507 notproduct(bool, CheckCompressedOops, true, \
508 "Generate checks in encoding/decoding code in debug VM") \
509 \
510 product_pd(uintx, HeapBaseMinAddress, \
511 "OS specific low limit for heap base address") \
512 \
513 diagnostic(bool, PrintCompressedOopsMode, false, \
514 "Print compressed oops base address and encoding mode") \
515 \
516 lp64_product(intx, ObjectAlignmentInBytes, 8, \
517 "Default object alignment in bytes, 8 is minimum") \
518 \
519 product(bool, AssumeMP, false, \
520 "Instruct the VM to assume multiple processors are available") \
521 \
522 /* UseMembar is theoretically a temp flag used for memory barrier \
523 * removal testing. It was supposed to be removed before FCS but has \
524 * been re-added (see 6401008) */ \
525 product_pd(bool, UseMembar, \
526 "(Unstable) Issues membars on thread state transitions") \
527 \
528 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \
529 * that don't support it. This will be replaced by processor detection \
530 * logic. \
531 */ \
532 product(bool, UsePPCLWSYNC, true, \
533 "Use lwsync instruction if true, else use slower sync") \
534 \
535 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
536 "Clean the chunk pool asynchronously") \
537 \
538 experimental(bool, AlwaysSafeConstructors, false, \
539 "Force safe construction, as if all fields are final.") \
540 \
541 /* Temporary: See 6948537 */ \
542 experimental(bool, UseMemSetInBOT, true, \
543 "(Unstable) uses memset in BOT updates in GC code") \
544 \
545 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
546 "Enable normal processing of flags relating to field diagnostics")\
547 \
548 experimental(bool, UnlockExperimentalVMOptions, false, \
549 "Enable normal processing of flags relating to experimental " \
550 "features") \
551 \
552 product(bool, JavaMonitorsInStackTrace, true, \
553 "Print information about Java monitor locks when the stacks are" \
554 "dumped") \
555 \
556 product_pd(bool, UseLargePages, \
557 "Use large page memory") \
558 \
559 product_pd(bool, UseLargePagesIndividualAllocation, \
560 "Allocate large pages individually for better affinity") \
561 \
562 develop(bool, LargePagesIndividualAllocationInjectError, false, \
563 "Fail large pages individual allocation") \
564 \
565 product(bool, UseLargePagesInMetaspace, false, \
566 "Use large page memory in metaspace. " \
567 "Only used if UseLargePages is enabled.") \
568 \
569 develop(bool, TracePageSizes, false, \
570 "Trace page size selection and usage") \
571 \
572 product(bool, UseNUMA, false, \
573 "Use NUMA if available") \
574 \
575 product(bool, UseNUMAInterleaving, false, \
576 "Interleave memory across NUMA nodes if available") \
577 \
578 product(uintx, NUMAInterleaveGranularity, 2*M, \
579 "Granularity to use for NUMA interleaving on Windows OS") \
580 \
581 product(bool, ForceNUMA, false, \
582 "Force NUMA optimizations on single-node/UMA systems") \
583 \
584 product(uintx, NUMAChunkResizeWeight, 20, \
585 "Percentage (0-100) used to weight the current sample when " \
586 "computing exponentially decaying average for " \
587 "AdaptiveNUMAChunkSizing") \
588 \
589 product(uintx, NUMASpaceResizeRate, 1*G, \
590 "Do not reallocate more than this amount per collection") \
591 \
592 product(bool, UseAdaptiveNUMAChunkSizing, true, \
593 "Enable adaptive chunk sizing for NUMA") \
594 \
595 product(bool, NUMAStats, false, \
596 "Print NUMA stats in detailed heap information") \
597 \
598 product(uintx, NUMAPageScanRate, 256, \
599 "Maximum number of pages to include in the page scan procedure") \
600 \
601 product_pd(bool, NeedsDeoptSuspend, \
602 "True for register window machines (sparc/ia64)") \
603 \
604 product(intx, UseSSE, 99, \
605 "Highest supported SSE instructions set on x86/x64") \
606 \
607 product(bool, UseAES, false, \
608 "Control whether AES instructions can be used on x86/x64") \
609 \
610 product(uintx, LargePageSizeInBytes, 0, \
611 "Large page size (0 to let VM choose the page size)") \
612 \
613 product(uintx, LargePageHeapSizeThreshold, 128*M, \
614 "Use large pages if maximum heap is at least this big") \
615 \
616 product(bool, ForceTimeHighResolution, false, \
617 "Using high time resolution (for Win32 only)") \
618 \
619 experimental(bool, AssumeMonotonicOSTimers, false, \
620 "Assume that the OS system timers are monotonic " \
621 "(Solaris and OS X)") \
622 \
623 develop(bool, TraceItables, false, \
624 "Trace initialization and use of itables") \
625 \
626 develop(bool, TracePcPatching, false, \
627 "Trace usage of frame::patch_pc") \
628 \
629 develop(bool, TraceJumps, false, \
630 "Trace assembly jumps in thread ring buffer") \
631 \
632 develop(bool, TraceRelocator, false, \
633 "Trace the bytecode relocator") \
634 \
635 develop(bool, TraceLongCompiles, false, \
636 "Print out every time compilation is longer than " \
637 "a given threshold") \
638 \
639 develop(bool, SafepointALot, false, \
640 "Generate a lot of safepoints. This works with " \
641 "GuaranteedSafepointInterval") \
642 \
643 product_pd(bool, BackgroundCompilation, \
644 "A thread requesting compilation is not blocked during " \
645 "compilation") \
646 \
647 product(bool, PrintVMQWaitTime, false, \
648 "Print out the waiting time in VM operation queue") \
649 \
650 develop(bool, NoYieldsInMicrolock, false, \
651 "Disable yields in microlock") \
652 \
653 develop(bool, TraceOopMapGeneration, false, \
654 "Show OopMapGeneration") \
655 \
656 product(bool, MethodFlushing, true, \
657 "Reclamation of zombie and not-entrant methods") \
658 \
659 develop(bool, VerifyStack, false, \
660 "Verify stack of each thread when it is entering a runtime call") \
661 \
662 diagnostic(bool, ForceUnreachable, false, \
663 "Make all non code cache addresses to be unreachable by " \
664 "forcing use of 64bit literal fixups") \
665 \
666 notproduct(bool, StressDerivedPointers, false, \
667 "Force scavenge when a derived pointer is detected on stack " \
668 "after rtm call") \
669 \
670 develop(bool, TraceDerivedPointers, false, \
671 "Trace traversal of derived pointers on stack") \
672 \
673 notproduct(bool, TraceCodeBlobStacks, false, \
674 "Trace stack-walk of codeblobs") \
675 \
676 product(bool, PrintJNIResolving, false, \
677 "Used to implement -v:jni") \
678 \
679 notproduct(bool, PrintRewrites, false, \
680 "Print methods that are being rewritten") \
681 \
682 product(bool, UseInlineCaches, true, \
683 "Use Inline Caches for virtual calls ") \
684 \
685 develop(bool, InlineArrayCopy, true, \
686 "Inline arraycopy native that is known to be part of " \
687 "base library DLL") \
688 \
689 develop(bool, InlineObjectHash, true, \
690 "Inline Object::hashCode() native that is known to be part " \
691 "of base library DLL") \
692 \
693 develop(bool, InlineNatives, true, \
694 "Inline natives that are known to be part of base library DLL") \
695 \
696 develop(bool, InlineMathNatives, true, \
697 "Inline SinD, CosD, etc.") \
698 \
699 develop(bool, InlineClassNatives, true, \
700 "Inline Class.isInstance, etc") \
701 \
702 develop(bool, InlineThreadNatives, true, \
703 "Inline Thread.currentThread, etc") \
704 \
705 develop(bool, InlineUnsafeOps, true, \
706 "Inline memory ops (native methods) from sun.misc.Unsafe") \
707 \
708 product(bool, CriticalJNINatives, true, \
709 "Check for critical JNI entry points") \
710 \
711 notproduct(bool, StressCriticalJNINatives, false, \
712 "Exercise register saving code in critical natives") \
713 \
714 product(bool, UseSSE42Intrinsics, false, \
715 "SSE4.2 versions of intrinsics") \
716 \
717 product(bool, UseAESIntrinsics, false, \
718 "Use intrinsics for AES versions of crypto") \
719 \
720 product(bool, UseCRC32Intrinsics, false, \
721 "use intrinsics for java.util.zip.CRC32") \
722 \
723 develop(bool, TraceCallFixup, false, \
724 "Trace all call fixups") \
725 \
726 develop(bool, DeoptimizeALot, false, \
727 "Deoptimize at every exit from the runtime system") \
728 \
729 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
730 "A comma separated list of bcis to deoptimize at") \
731 \
732 product(bool, DeoptimizeRandom, false, \
733 "Deoptimize random frames on random exit from the runtime system")\
734 \
735 notproduct(bool, ZombieALot, false, \
736 "Create zombies (non-entrant) at exit from the runtime system") \
737 \
738 product(bool, UnlinkSymbolsALot, false, \
739 "Unlink unreferenced symbols from the symbol table at safepoints")\
740 \
741 notproduct(bool, WalkStackALot, false, \
742 "Trace stack (no print) at every exit from the runtime system") \
743 \
744 product(bool, Debugging, false, \
745 "Set when executing debug methods in debug.cpp " \
746 "(to prevent triggering assertions)") \
747 \
748 notproduct(bool, StrictSafepointChecks, trueInDebug, \
749 "Enable strict checks that safepoints cannot happen for threads " \
750 "that use No_Safepoint_Verifier") \
751 \
752 notproduct(bool, VerifyLastFrame, false, \
753 "Verify oops on last frame on entry to VM") \
754 \
755 develop(bool, TraceHandleAllocation, false, \
756 "Print out warnings when suspiciously many handles are allocated")\
757 \
758 product(bool, UseCompilerSafepoints, true, \
759 "Stop at safepoints in compiled code") \
760 \
761 product(bool, FailOverToOldVerifier, true, \
762 "Fail over to old verifier when split verifier fails") \
763 \
764 develop(bool, ShowSafepointMsgs, false, \
765 "Show message about safepoint synchronization") \
766 \
767 product(bool, SafepointTimeout, false, \
768 "Time out and warn or fail after SafepointTimeoutDelay " \
769 "milliseconds if failed to reach safepoint") \
770 \
771 develop(bool, DieOnSafepointTimeout, false, \
772 "Die upon failure to reach safepoint (see SafepointTimeout)") \
773 \
774 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
775 /* typically, at most a few retries are needed */ \
776 product(intx, SuspendRetryCount, 50, \
777 "Maximum retry count for an external suspend request") \
778 \
779 product(intx, SuspendRetryDelay, 5, \
780 "Milliseconds to delay per retry (* current_retry_count)") \
781 \
782 product(bool, AssertOnSuspendWaitFailure, false, \
783 "Assert/Guarantee on external suspend wait failure") \
784 \
785 product(bool, TraceSuspendWaitFailures, false, \
786 "Trace external suspend wait failures") \
787 \
788 product(bool, MaxFDLimit, true, \
789 "Bump the number of file descriptors to maximum in Solaris") \
790 \
791 diagnostic(bool, LogEvents, true, \
792 "Enable the various ring buffer event logs") \
793 \
794 diagnostic(uintx, LogEventsBufferEntries, 10, \
795 "Number of ring buffer event logs") \
796 \
797 product(bool, BytecodeVerificationRemote, true, \
798 "Enable the Java bytecode verifier for remote classes") \
799 \
800 product(bool, BytecodeVerificationLocal, false, \
801 "Enable the Java bytecode verifier for local classes") \
802 \
803 develop(bool, ForceFloatExceptions, trueInDebug, \
804 "Force exceptions on FP stack under/overflow") \
805 \
806 develop(bool, VerifyStackAtCalls, false, \
807 "Verify that the stack pointer is unchanged after calls") \
808 \
809 develop(bool, TraceJavaAssertions, false, \
810 "Trace java language assertions") \
811 \
812 notproduct(bool, CheckAssertionStatusDirectives, false, \
813 "Temporary - see javaClasses.cpp") \
814 \
815 notproduct(bool, PrintMallocFree, false, \
816 "Trace calls to C heap malloc/free allocation") \
817 \
818 product(bool, PrintOopAddress, false, \
819 "Always print the location of the oop") \
820 \
821 notproduct(bool, VerifyCodeCache, false, \
822 "Verify code cache on memory allocation/deallocation") \
823 \
824 develop(bool, ZapDeadCompiledLocals, false, \
825 "Zap dead locals in compiler frames") \
826 \
827 notproduct(bool, ZapDeadLocalsOld, false, \
828 "Zap dead locals (old version, zaps all frames when " \
829 "entering the VM") \
830 \
831 notproduct(bool, CheckOopishValues, false, \
832 "Warn if value contains oop (requires ZapDeadLocals)") \
833 \
834 develop(bool, UseMallocOnly, false, \
835 "Use only malloc/free for allocation (no resource area/arena)") \
836 \
837 develop(bool, PrintMalloc, false, \
838 "Print all malloc/free calls") \
839 \
840 develop(bool, PrintMallocStatistics, false, \
841 "Print malloc/free statistics") \
842 \
843 develop(bool, ZapResourceArea, trueInDebug, \
844 "Zap freed resource/arena space with 0xABABABAB") \
845 \
846 notproduct(bool, ZapVMHandleArea, trueInDebug, \
847 "Zap freed VM handle space with 0xBCBCBCBC") \
848 \
849 develop(bool, ZapJNIHandleArea, trueInDebug, \
850 "Zap freed JNI handle space with 0xFEFEFEFE") \
851 \
852 notproduct(bool, ZapStackSegments, trueInDebug, \
853 "Zap allocated/freed stack segments with 0xFADFADED") \
854 \
855 develop(bool, ZapUnusedHeapArea, trueInDebug, \
856 "Zap unused heap space with 0xBAADBABE") \
857 \
858 develop(bool, TraceZapUnusedHeapArea, false, \
859 "Trace zapping of unused heap space") \
860 \
861 develop(bool, CheckZapUnusedHeapArea, false, \
862 "Check zapping of unused heap space") \
863 \
864 develop(bool, ZapFillerObjects, trueInDebug, \
865 "Zap filler objects with 0xDEAFBABE") \
866 \
867 develop(bool, PrintVMMessages, true, \
868 "Print VM messages on console") \
869 \
870 product(bool, PrintGCApplicationConcurrentTime, false, \
871 "Print the time the application has been running") \
872 \
873 product(bool, PrintGCApplicationStoppedTime, false, \
874 "Print the time the application has been stopped") \
875 \
876 diagnostic(bool, VerboseVerification, false, \
877 "Display detailed verification details") \
878 \
879 notproduct(uintx, ErrorHandlerTest, 0, \
880 "If > 0, provokes an error after VM initialization; the value " \
881 "determines which error to provoke. See test_error_handler() " \
882 "in debug.cpp.") \
883 \
884 develop(bool, Verbose, false, \
885 "Print additional debugging information from other modes") \
886 \
887 develop(bool, PrintMiscellaneous, false, \
888 "Print uncategorized debugging information (requires +Verbose)") \
889 \
890 develop(bool, WizardMode, false, \
891 "Print much more debugging information") \
892 \
893 product(bool, ShowMessageBoxOnError, false, \
894 "Keep process alive on VM fatal error") \
895 \
896 product(bool, CreateMinidumpOnCrash, false, \
897 "Create minidump on VM fatal error") \
898 \
899 product_pd(bool, UseOSErrorReporting, \
900 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
901 \
902 product(bool, SuppressFatalErrorMessage, false, \
903 "Report NO fatal error message (avoid deadlock)") \
904 \
905 product(ccstrlist, OnError, "", \
906 "Run user-defined commands on fatal error; see VMError.cpp " \
907 "for examples") \
908 \
909 product(ccstrlist, OnOutOfMemoryError, "", \
910 "Run user-defined commands on first java.lang.OutOfMemoryError") \
911 \
912 manageable(bool, HeapDumpBeforeFullGC, false, \
913 "Dump heap to file before any major stop-the-world GC") \
914 \
915 manageable(bool, HeapDumpAfterFullGC, false, \
916 "Dump heap to file after any major stop-the-world GC") \
917 \
918 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
919 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
920 \
921 manageable(ccstr, HeapDumpPath, NULL, \
922 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
923 "directory) of the dump file (defaults to java_pid<pid>.hprof " \
924 "in the working directory)") \
925 \
926 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
927 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
928 "when the heap usage is larger than this") \
929 \
930 develop(uintx, HeapDumpSegmentSize, 1*G, \
931 "Approximate segment size when generating a segmented heap dump") \
932 \
933 develop(bool, BreakAtWarning, false, \
934 "Execute breakpoint upon encountering VM warning") \
935 \
936 develop(bool, TraceVMOperation, false, \
937 "Trace VM operations") \
938 \
939 develop(bool, UseFakeTimers, false, \
940 "Tell whether the VM should use system time or a fake timer") \
941 \
942 product(ccstr, NativeMemoryTracking, "off", \
943 "Native memory tracking options") \
944 \
945 diagnostic(bool, PrintNMTStatistics, false, \
946 "Print native memory tracking summary data if it is on") \
947 \
948 diagnostic(bool, AutoShutdownNMT, true, \
949 "Automatically shutdown native memory tracking under stress " \
950 "situations. When set to false, native memory tracking tries to " \
951 "stay alive at the expense of JVM performance") \
952 \
953 diagnostic(bool, LogCompilation, false, \
954 "Log compilation activity in detail to LogFile") \
955 \
956 product(bool, PrintCompilation, false, \
957 "Print compilations") \
958 \
959 diagnostic(bool, TraceNMethodInstalls, false, \
960 "Trace nmethod installation") \
961 \
962 diagnostic(intx, ScavengeRootsInCode, 2, \
963 "0: do not allow scavengable oops in the code cache; " \
964 "1: allow scavenging from the code cache; " \
965 "2: emit as many constants as the compiler can see") \
966 \
967 product(bool, AlwaysRestoreFPU, false, \
968 "Restore the FPU control word after every JNI call (expensive)") \
969 \
970 diagnostic(bool, PrintCompilation2, false, \
971 "Print additional statistics per compilation") \
972 \
973 diagnostic(bool, PrintAdapterHandlers, false, \
974 "Print code generated for i2c/c2i adapters") \
975 \
976 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
977 "Verify that i2c/c2i adapters are called properly") \
978 \
979 develop(bool, VerifyAdapterSharing, false, \
980 "Verify that the code for shared adapters is the equivalent") \
981 \
982 diagnostic(bool, PrintAssembly, false, \
983 "Print assembly code (using external disassembler.so)") \
984 \
985 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
986 "Print options string passed to disassembler.so") \
987 \
988 diagnostic(bool, PrintNMethods, false, \
989 "Print assembly code for nmethods when generated") \
990 \
991 diagnostic(bool, PrintNativeNMethods, false, \
992 "Print assembly code for native nmethods when generated") \
993 \
994 develop(bool, PrintDebugInfo, false, \
995 "Print debug information for all nmethods when generated") \
996 \
997 develop(bool, PrintRelocations, false, \
998 "Print relocation information for all nmethods when generated") \
999 \
1000 develop(bool, PrintDependencies, false, \
1001 "Print dependency information for all nmethods when generated") \
1002 \
1003 develop(bool, PrintExceptionHandlers, false, \
1004 "Print exception handler tables for all nmethods when generated") \
1005 \
1006 develop(bool, StressCompiledExceptionHandlers, false, \
1007 "Exercise compiled exception handlers") \
1008 \
1009 develop(bool, InterceptOSException, false, \
1010 "Start debugger when an implicit OS (e.g. NULL) " \
1011 "exception happens") \
1012 \
1013 product(bool, PrintCodeCache, false, \
1014 "Print the code cache memory usage when exiting") \
1015 \
1016 develop(bool, PrintCodeCache2, false, \
1017 "Print detailed usage information on the code cache when exiting")\
1018 \
1019 product(bool, PrintCodeCacheOnCompilation, false, \
1020 "Print the code cache memory usage each time a method is " \
1021 "compiled") \
1022 \
1023 diagnostic(bool, PrintStubCode, false, \
1024 "Print generated stub code") \
1025 \
1026 product(bool, StackTraceInThrowable, true, \
1027 "Collect backtrace in throwable when exception happens") \
1028 \
1029 product(bool, OmitStackTraceInFastThrow, true, \
1030 "Omit backtraces for some 'hot' exceptions in optimized code") \
1031 \
1032 product(bool, ProfilerPrintByteCodeStatistics, false, \
1033 "Print bytecode statistics when dumping profiler output") \
1034 \
1035 product(bool, ProfilerRecordPC, false, \
1036 "Collect ticks for each 16 byte interval of compiled code") \
1037 \
1038 product(bool, ProfileVM, false, \
1039 "Profile ticks that fall within VM (either in the VM Thread " \
1040 "or VM code called through stubs)") \
1041 \
1042 product(bool, ProfileIntervals, false, \
1043 "Print profiles for each interval (see ProfileIntervalsTicks)") \
1044 \
1045 notproduct(bool, ProfilerCheckIntervals, false, \
1046 "Collect and print information on spacing of profiler ticks") \
1047 \
1048 develop(bool, PrintJVMWarnings, false, \
1049 "Print warnings for unimplemented JVM functions") \
1050 \
1051 product(bool, PrintWarnings, true, \
1052 "Print JVM warnings to output stream") \
1053 \
1054 notproduct(uintx, WarnOnStalledSpinLock, 0, \
1055 "Print warnings for stalled SpinLocks") \
1056 \
1057 product(bool, RegisterFinalizersAtInit, true, \
1058 "Register finalizable objects at end of Object.<init> or " \
1059 "after allocation") \
1060 \
1061 develop(bool, RegisterReferences, true, \
1062 "Tell whether the VM should register soft/weak/final/phantom " \
1063 "references") \
1064 \
1065 develop(bool, IgnoreRewrites, false, \
1066 "Suppress rewrites of bytecodes in the oopmap generator. " \
1067 "This is unsafe!") \
1068 \
1069 develop(bool, PrintCodeCacheExtension, false, \
1070 "Print extension of code cache") \
1071 \
1072 develop(bool, UsePrivilegedStack, true, \
1073 "Enable the security JVM functions") \
1074 \
1075 develop(bool, ProtectionDomainVerification, true, \
1076 "Verify protection domain before resolution in system dictionary")\
1077 \
1078 product(bool, ClassUnloading, true, \
1079 "Do unloading of classes") \
1080 \
1081 develop(bool, DisableStartThread, false, \
1082 "Disable starting of additional Java threads " \
1083 "(for debugging only)") \
1084 \
1085 develop(bool, MemProfiling, false, \
1086 "Write memory usage profiling to log file") \
1087 \
1088 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1089 "Print the system dictionary at exit") \
1090 \
1091 experimental(intx, PredictedLoadedClassCount, 0, \
1092 "Experimental: Tune loaded class cache starting size") \
1093 \
1094 diagnostic(bool, UnsyncloadClass, false, \
1095 "Unstable: VM calls loadClass unsynchronized. Custom " \
1096 "class loader must call VM synchronized for findClass " \
1097 "and defineClass.") \
1098 \
1099 product(bool, AlwaysLockClassLoader, false, \
1100 "Require the VM to acquire the class loader lock before calling " \
1101 "loadClass() even for class loaders registering " \
1102 "as parallel capable") \
1103 \
1104 product(bool, AllowParallelDefineClass, false, \
1105 "Allow parallel defineClass requests for class loaders " \
1106 "registering as parallel capable") \
1107 \
1108 product(bool, MustCallLoadClassInternal, false, \
1109 "Call loadClassInternal() rather than loadClass()") \
1110 \
1111 product_pd(bool, DontYieldALot, \
1112 "Throw away obvious excess yield calls (for Solaris only)") \
1113 \
1114 product_pd(bool, ConvertSleepToYield, \
1115 "Convert sleep(0) to thread yield " \
1116 "(may be off for Solaris to improve GUI)") \
1117 \
1118 product(bool, ConvertYieldToSleep, false, \
1119 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
1120 "behavior (Solaris only)") \
1121 \
1122 product(bool, UseBoundThreads, true, \
1123 "Bind user level threads to kernel threads (for Solaris only)") \
1124 \
1125 develop(bool, UseDetachedThreads, true, \
1126 "Use detached threads that are recycled upon termination " \
1127 "(for Solaris only)") \
1128 \
1129 product(bool, UseLWPSynchronization, true, \
1130 "Use LWP-based instead of libthread-based synchronization " \
1131 "(SPARC only)") \
1132 \
1133 product(ccstr, SyncKnobs, NULL, \
1134 "(Unstable) Various monitor synchronization tunables") \
1135 \
1136 product(intx, EmitSync, 0, \
1137 "(Unsafe, Unstable) " \
1138 "Control emission of inline sync fast-path code") \
1139 \
1140 product(intx, MonitorBound, 0, "Bound Monitor population") \
1141 \
1142 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1143 \
1144 product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \
1145 \
1146 product(intx, SyncVerbose, 0, "(Unstable)") \
1147 \
1148 product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \
1149 \
1150 product(intx, hashCode, 5, \
1151 "(Unstable) select hashCode generation algorithm") \
1152 \
1153 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1154 "(Unstable, Linux-specific) " \
1155 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \
1156 \
1157 product(bool, FilterSpuriousWakeups, true, \
1158 "Prevent spurious or premature wakeups from object.wait " \
1159 "(Solaris only)") \
1160 \
1161 product(intx, NativeMonitorTimeout, -1, "(Unstable)") \
1162 \
1163 product(intx, NativeMonitorFlags, 0, "(Unstable)") \
1164 \
1165 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \
1166 \
1167 develop(bool, UsePthreads, false, \
1168 "Use pthread-based instead of libthread-based synchronization " \
1169 "(SPARC only)") \
1170 \
1171 product(bool, AdjustConcurrency, false, \
1172 "Call thr_setconcurrency at thread creation time to avoid " \
1173 "LWP starvation on MP systems (for Solaris Only)") \
1174 \
1175 product(bool, ReduceSignalUsage, false, \
1176 "Reduce the use of OS signals in Java and/or the VM") \
1177 \
1178 develop_pd(bool, ShareVtableStubs, \
1179 "Share vtable stubs (smaller code but worse branch prediction") \
1180 \
1181 develop(bool, LoadLineNumberTables, true, \
1182 "Tell whether the class file parser loads line number tables") \
1183 \
1184 develop(bool, LoadLocalVariableTables, true, \
1185 "Tell whether the class file parser loads local variable tables") \
1186 \
1187 develop(bool, LoadLocalVariableTypeTables, true, \
1188 "Tell whether the class file parser loads local variable type" \
1189 "tables") \
1190 \
1191 product(bool, AllowUserSignalHandlers, false, \
1192 "Do not complain if the application installs signal handlers " \
1193 "(Solaris & Linux only)") \
1194 \
1195 product(bool, UseSignalChaining, true, \
1196 "Use signal-chaining to invoke signal handlers installed " \
1197 "by the application (Solaris & Linux only)") \
1198 \
1199 product(bool, UseAltSigs, false, \
1200 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1201 "internal signals (Solaris only)") \
1202 \
1203 product(bool, AllowJNIEnvProxy, false, \
1204 "Allow JNIEnv proxies for jdbx") \
1205 \
1206 product(bool, JNIDetachReleasesMonitors, true, \
1207 "JNI DetachCurrentThread releases monitors owned by thread") \
1208 \
1209 product(bool, RestoreMXCSROnJNICalls, false, \
1210 "Restore MXCSR when returning from JNI calls") \
1211 \
1212 product(bool, CheckJNICalls, false, \
1213 "Verify all arguments to JNI calls") \
1214 \
1215 product(bool, UseFastJNIAccessors, true, \
1216 "Use optimized versions of Get<Primitive>Field") \
1217 \
1218 product(bool, EagerXrunInit, false, \
1219 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1220 "but not all -Xrun libraries may support the state of the VM " \
1221 "at this time") \
1222 \
1223 product(bool, PreserveAllAnnotations, false, \
1224 "Preserve RuntimeInvisibleAnnotations as well " \
1225 "as RuntimeVisibleAnnotations") \
1226 \
1227 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1228 "Number of OutOfMemoryErrors preallocated with backtrace") \
1229 \
1230 product(bool, LazyBootClassLoader, true, \
1231 "Enable/disable lazy opening of boot class path entries") \
1232 \
1233 product(bool, UseXMMForArrayCopy, false, \
1234 "Use SSE2 MOVQ instruction for Arraycopy") \
1235 \
1236 product(intx, FieldsAllocationStyle, 1, \
1237 "0 - type based with oops first, 1 - with oops last, " \
1238 "2 - oops in super and sub classes are together") \
1239 \
1240 product(bool, CompactFields, true, \
1241 "Allocate nonstatic fields in gaps between previous fields") \
1242 \
1243 notproduct(bool, PrintFieldLayout, false, \
1244 "Print field layout for each class") \
1245 \
1246 product(intx, ContendedPaddingWidth, 128, \
1247 "How many bytes to pad the fields/classes marked @Contended with")\
1248 \
1249 product(bool, EnableContended, true, \
1250 "Enable @Contended annotation support") \
1251 \
1252 product(bool, RestrictContended, true, \
1253 "Restrict @Contended to trusted classes") \
1254 \
1255 product(bool, UseBiasedLocking, true, \
1256 "Enable biased locking in JVM") \
1257 \
1258 product(intx, BiasedLockingStartupDelay, 4000, \
1259 "Number of milliseconds to wait before enabling biased locking") \
1260 \
1261 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1262 "Print statistics of biased locking in JVM") \
1263 \
1264 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1265 "Threshold of number of revocations per type to try to " \
1266 "rebias all objects in the heap of that type") \
1267 \
1268 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1269 "Threshold of number of revocations per type to permanently " \
1270 "revoke biases of all objects in the heap of that type") \
1271 \
1272 product(intx, BiasedLockingDecayTime, 25000, \
1273 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1274 "type after previous bulk rebias") \
1275 \
1276 /* tracing */ \
1277 \
1278 notproduct(bool, TraceRuntimeCalls, false, \
1279 "Trace run-time calls") \
1280 \
1281 develop(bool, TraceJNICalls, false, \
1282 "Trace JNI calls") \
1283 \
1284 develop(bool, StressRewriter, false, \
1285 "Stress linktime bytecode rewriting") \
1286 \
1287 notproduct(bool, TraceJVMCalls, false, \
1288 "Trace JVM calls") \
1289 \
1290 product(ccstr, TraceJVMTI, NULL, \
1291 "Trace flags for JVMTI functions and events") \
1292 \
1293 /* This option can change an EMCP method into an obsolete method. */ \
1294 /* This can affect tests that except specific methods to be EMCP. */ \
1295 /* This option should be used with caution. */ \
1296 product(bool, StressLdcRewrite, false, \
1297 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1298 \
1299 product(intx, TraceRedefineClasses, 0, \
1300 "Trace level for JVMTI RedefineClasses") \
1301 \
1302 develop(bool, StressMethodComparator, false, \
1303 "Run the MethodComparator on all loaded methods") \
1304 \
1305 /* change to false by default sometime after Mustang */ \
1306 product(bool, VerifyMergedCPBytecodes, true, \
1307 "Verify bytecodes after RedefineClasses constant pool merging") \
1308 \
1309 develop(bool, TraceJNIHandleAllocation, false, \
1310 "Trace allocation/deallocation of JNI handle blocks") \
1311 \
1312 develop(bool, TraceThreadEvents, false, \
1313 "Trace all thread events") \
1314 \
1315 develop(bool, TraceBytecodes, false, \
1316 "Trace bytecode execution") \
1317 \
1318 develop(bool, TraceClassInitialization, false, \
1319 "Trace class initialization") \
1320 \
1321 develop(bool, TraceExceptions, false, \
1322 "Trace exceptions") \
1323 \
1324 develop(bool, TraceICs, false, \
1325 "Trace inline cache changes") \
1326 \
1327 notproduct(bool, TraceInvocationCounterOverflow, false, \
1328 "Trace method invocation counter overflow") \
1329 \
1330 develop(bool, TraceInlineCacheClearing, false, \
1331 "Trace clearing of inline caches in nmethods") \
1332 \
1333 develop(bool, TraceDependencies, false, \
1334 "Trace dependencies") \
1335 \
1336 develop(bool, VerifyDependencies, trueInDebug, \
1337 "Exercise and verify the compilation dependency mechanism") \
1338 \
1339 develop(bool, TraceNewOopMapGeneration, false, \
1340 "Trace OopMapGeneration") \
1341 \
1342 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1343 "Trace OopMapGeneration: print detailed cell states") \
1344 \
1345 develop(bool, TimeOopMap, false, \
1346 "Time calls to GenerateOopMap::compute_map() in sum") \
1347 \
1348 develop(bool, TimeOopMap2, false, \
1349 "Time calls to GenerateOopMap::compute_map() individually") \
1350 \
1351 develop(bool, TraceMonitorMismatch, false, \
1352 "Trace monitor matching failures during OopMapGeneration") \
1353 \
1354 develop(bool, TraceOopMapRewrites, false, \
1355 "Trace rewriting of method oops during oop map generation") \
1356 \
1357 develop(bool, TraceSafepoint, false, \
1358 "Trace safepoint operations") \
1359 \
1360 develop(bool, TraceICBuffer, false, \
1361 "Trace usage of IC buffer") \
1362 \
1363 develop(bool, TraceCompiledIC, false, \
1364 "Trace changes of compiled IC") \
1365 \
1366 notproduct(bool, TraceZapDeadLocals, false, \
1367 "Trace zapping dead locals") \
1368 \
1369 develop(bool, TraceStartupTime, false, \
1370 "Trace setup time") \
1371 \
1372 develop(bool, TraceProtectionDomainVerification, false, \
1373 "Trace protection domain verification") \
1374 \
1375 develop(bool, TraceClearedExceptions, false, \
1376 "Print when an exception is forcibly cleared") \
1377 \
1378 product(bool, TraceClassResolution, false, \
1379 "Trace all constant pool resolutions (for debugging)") \
1380 \
1381 product(bool, TraceBiasedLocking, false, \
1382 "Trace biased locking in JVM") \
1383 \
1384 product(bool, TraceMonitorInflation, false, \
1385 "Trace monitor inflation in JVM") \
1386 \
1387 /* gc */ \
1388 \
1389 product(bool, UseSerialGC, false, \
1390 "Use the Serial garbage collector") \
1391 \
1392 product(bool, UseG1GC, false, \
1393 "Use the Garbage-First garbage collector") \
1394 \
1395 product(bool, UseParallelGC, false, \
1396 "Use the Parallel Scavenge garbage collector") \
1397 \
1398 product(bool, UseParallelOldGC, false, \
1399 "Use the Parallel Old garbage collector") \
1400 \
1401 product(uintx, HeapMaximumCompactionInterval, 20, \
1402 "How often should we maximally compact the heap (not allowing " \
1403 "any dead space)") \
1404 \
1405 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1406 "The collection count for the first maximum compaction") \
1407 \
1408 product(bool, UseMaximumCompactionOnSystemGC, true, \
1409 "Use maximum compaction in the Parallel Old garbage collector " \
1410 "for a system GC") \
1411 \
1412 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1413 "The mean used by the parallel compact dead wood " \
1414 "limiter (a number between 0-100)") \
1415 \
1416 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1417 "The standard deviation used by the parallel compact dead wood " \
1418 "limiter (a number between 0-100)") \
1419 \
1420 product(uintx, ParallelGCThreads, 0, \
1421 "Number of parallel threads parallel gc will use") \
1422 \
1423 product(bool, UseDynamicNumberOfGCThreads, false, \
1424 "Dynamically choose the number of parallel threads " \
1425 "parallel gc will use") \
1426 \
1427 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1428 "Force dynamic selection of the number of " \
1429 "parallel threads parallel gc will use to aid debugging") \
1430 \
1431 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1432 "Size of heap (bytes) per GC thread used in calculating the " \
1433 "number of GC threads") \
1434 \
1435 product(bool, TraceDynamicGCThreads, false, \
1436 "Trace the dynamic GC thread usage") \
1437 \
1438 develop(bool, ParallelOldGCSplitALot, false, \
1439 "Provoke splitting (copying data from a young gen space to " \
1440 "multiple destination spaces)") \
1441 \
1442 develop(uintx, ParallelOldGCSplitInterval, 3, \
1443 "How often to provoke splitting a young gen space") \
1444 \
1445 product(uintx, ConcGCThreads, 0, \
1446 "Number of threads concurrent gc will use") \
1447 \
1448 product(uintx, YoungPLABSize, 4096, \
1449 "Size of young gen promotion LAB's (in HeapWords)") \
1450 \
1451 product(uintx, OldPLABSize, 1024, \
1452 "Size of old gen promotion LAB's (in HeapWords)") \
1453 \
1454 product(uintx, GCTaskTimeStampEntries, 200, \
1455 "Number of time stamp entries per gc worker thread") \
1456 \
1457 product(bool, AlwaysTenure, false, \
1458 "Always tenure objects in eden (ParallelGC only)") \
1459 \
1460 product(bool, NeverTenure, false, \
1461 "Never tenure objects in eden, may tenure on overflow " \
1462 "(ParallelGC only)") \
1463 \
1464 product(bool, ScavengeBeforeFullGC, true, \
1465 "Scavenge youngest generation before each full GC, " \
1466 "used with UseParallelGC") \
1467 \
1468 develop(bool, ScavengeWithObjectsInToSpace, false, \
1469 "Allow scavenges to occur when to-space contains objects") \
1470 \
1471 product(bool, UseConcMarkSweepGC, false, \
1472 "Use Concurrent Mark-Sweep GC in the old generation") \
1473 \
1474 product(bool, ExplicitGCInvokesConcurrent, false, \
1475 "A System.gc() request invokes a concurrent collection; " \
1476 "(effective only when UseConcMarkSweepGC)") \
1477 \
1478 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1479 "A System.gc() request invokes a concurrent collection and " \
1480 "also unloads classes during such a concurrent gc cycle " \
1481 "(effective only when UseConcMarkSweepGC)") \
1482 \
1483 product(bool, GCLockerInvokesConcurrent, false, \
1484 "The exit of a JNI critical section necessitating a scavenge, " \
1485 "also kicks off a background concurrent collection") \
1486 \
1487 product(uintx, GCLockerEdenExpansionPercent, 5, \
1488 "How much the GC can expand the eden by while the GC locker " \
1489 "is active (as a percentage)") \
1490 \
1491 diagnostic(intx, GCLockerRetryAllocationCount, 2, \
1492 "Number of times to retry allocations when " \
1493 "blocked by the GC locker") \
1494 \
1495 develop(bool, UseCMSAdaptiveFreeLists, true, \
1496 "Use adaptive free lists in the CMS generation") \
1497 \
1498 develop(bool, UseAsyncConcMarkSweepGC, true, \
1499 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1500 \
1501 develop(bool, RotateCMSCollectionTypes, false, \
1502 "Rotate the CMS collections among concurrent and STW") \
1503 \
1504 product(bool, UseCMSBestFit, true, \
1505 "Use CMS best fit allocation strategy") \
1506 \
1507 product(bool, UseCMSCollectionPassing, true, \
1508 "Use passing of collection from background to foreground") \
1509 \
1510 product(bool, UseParNewGC, false, \
1511 "Use parallel threads in the new generation") \
1512 \
1513 product(bool, ParallelGCVerbose, false, \
1514 "Verbose output for parallel gc") \
1515 \
1516 product(uintx, ParallelGCBufferWastePct, 10, \
1517 "Wasted fraction of parallel allocation buffer") \
1518 \
1519 diagnostic(bool, ParallelGCRetainPLAB, false, \
1520 "Retain parallel allocation buffers across scavenges; " \
1521 "it is disabled because this currently conflicts with " \
1522 "parallel card scanning under certain conditions.") \
1523 \
1524 product(uintx, TargetPLABWastePct, 10, \
1525 "Target wasted space in last buffer as percent of overall " \
1526 "allocation") \
1527 \
1528 product(uintx, PLABWeight, 75, \
1529 "Percentage (0-100) used to weight the current sample when " \
1530 "computing exponentially decaying average for ResizePLAB") \
1531 \
1532 product(bool, ResizePLAB, true, \
1533 "Dynamically resize (survivor space) promotion LAB's") \
1534 \
1535 product(bool, PrintPLAB, false, \
1536 "Print (survivor space) promotion LAB's sizing decisions") \
1537 \
1538 product(intx, ParGCArrayScanChunk, 50, \
1539 "Scan a subset of object array and push remainder, if array is " \
1540 "bigger than this") \
1541 \
1542 product(bool, ParGCUseLocalOverflow, false, \
1543 "Instead of a global overflow list, use local overflow stacks") \
1544 \
1545 product(bool, ParGCTrimOverflow, true, \
1546 "Eagerly trim the local overflow lists " \
1547 "(when ParGCUseLocalOverflow)") \
1548 \
1549 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1550 "Simulate work queue overflow in ParNew") \
1551 \
1552 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1553 "An `interval' counter that determines how frequently " \
1554 "we simulate overflow; a smaller number increases frequency") \
1555 \
1556 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1557 "The desired number of objects to claim from the overflow list") \
1558 \
1559 diagnostic(uintx, ParGCStridesPerThread, 2, \
1560 "The number of strides per worker thread that we divide up the " \
1561 "card table scanning work into") \
1562 \
1563 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1564 "The number of cards in each chunk of the parallel chunks used " \
1565 "during card table scanning") \
1566 \
1567 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1568 "Number of blocks to attempt to claim when refilling CMS LAB's " \
1569 "for parallel GC") \
1570 \
1571 product(uintx, OldPLABWeight, 50, \
1572 "Percentage (0-100) used to weight the current sample when " \
1573 "computing exponentially decaying average for resizing " \
1574 "CMSParPromoteBlocksToClaim") \
1575 \
1576 product(bool, ResizeOldPLAB, true, \
1577 "Dynamically resize (old gen) promotion LAB's") \
1578 \
1579 product(bool, PrintOldPLAB, false, \
1580 "Print (old gen) promotion LAB's sizing decisions") \
1581 \
1582 product(uintx, CMSOldPLABMin, 16, \
1583 "Minimum size of CMS gen promotion LAB caches per worker " \
1584 "per block size") \
1585 \
1586 product(uintx, CMSOldPLABMax, 1024, \
1587 "Maximum size of CMS gen promotion LAB caches per worker " \
1588 "per block size") \
1589 \
1590 product(uintx, CMSOldPLABNumRefills, 4, \
1591 "Nominal number of refills of CMS gen promotion LAB cache " \
1592 "per worker per block size") \
1593 \
1594 product(bool, CMSOldPLABResizeQuicker, false, \
1595 "React on-the-fly during a scavenge to a sudden " \
1596 "change in block demand rate") \
1597 \
1598 product(uintx, CMSOldPLABToleranceFactor, 4, \
1599 "The tolerance of the phase-change detector for on-the-fly " \
1600 "PLAB resizing during a scavenge") \
1601 \
1602 product(uintx, CMSOldPLABReactivityFactor, 2, \
1603 "The gain in the feedback loop for on-the-fly PLAB resizing " \
1604 "during a scavenge") \
1605 \
1606 product(bool, AlwaysPreTouch, false, \
1607 "Force all freshly committed pages to be pre-touched") \
1608 \
1609 product_pd(uintx, CMSYoungGenPerWorker, \
1610 "The maximum size of young gen chosen by default per GC worker " \
1611 "thread available") \
1612 \
1613 product(bool, CMSIncrementalMode, false, \
1614 "Whether CMS GC should operate in \"incremental\" mode") \
1615 \
1616 product(uintx, CMSIncrementalDutyCycle, 10, \
1617 "Percentage (0-100) of CMS incremental mode duty cycle. If " \
1618 "CMSIncrementalPacing is enabled, then this is just the initial " \
1619 "value.") \
1620 \
1621 product(bool, CMSIncrementalPacing, true, \
1622 "Whether the CMS incremental mode duty cycle should be " \
1623 "automatically adjusted") \
1624 \
1625 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1626 "Minimum percentage (0-100) of the CMS incremental duty cycle " \
1627 "used when CMSIncrementalPacing is enabled") \
1628 \
1629 product(uintx, CMSIncrementalSafetyFactor, 10, \
1630 "Percentage (0-100) used to add conservatism when computing the " \
1631 "duty cycle") \
1632 \
1633 product(uintx, CMSIncrementalOffset, 0, \
1634 "Percentage (0-100) by which the CMS incremental mode duty cycle "\
1635 "is shifted to the right within the period between young GCs") \
1636 \
1637 product(uintx, CMSExpAvgFactor, 50, \
1638 "Percentage (0-100) used to weight the current sample when " \
1639 "computing exponential averages for CMS statistics") \
1640 \
1641 product(uintx, CMS_FLSWeight, 75, \
1642 "Percentage (0-100) used to weight the current sample when " \
1643 "computing exponentially decaying averages for CMS FLS " \
1644 "statistics") \
1645 \
1646 product(uintx, CMS_FLSPadding, 1, \
1647 "The multiple of deviation from mean to use for buffering " \
1648 "against volatility in free list demand") \
1649 \
1650 product(uintx, FLSCoalescePolicy, 2, \
1651 "CMS: aggressiveness level for coalescing, increasing " \
1652 "from 0 to 4") \
1653 \
1654 product(bool, FLSAlwaysCoalesceLarge, false, \
1655 "CMS: larger free blocks are always available for coalescing") \
1656 \
1657 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1658 "CMS: the smaller the percentage the greater the coalescing " \
1659 "force") \
1660 \
1661 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1662 "CMS: the factor by which to inflate estimated demand of small " \
1663 "block sizes to prevent coalescing with an adjoining block") \
1664 \
1665 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1666 "CMS: the factor by which to inflate estimated demand of large " \
1667 "block sizes to prevent coalescing with an adjoining block") \
1668 \
1669 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1670 "CMS: the factor by which to inflate estimated demand of small " \
1671 "block sizes to prevent splitting to supply demand for smaller " \
1672 "blocks") \
1673 \
1674 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1675 "CMS: the factor by which to inflate estimated demand of large " \
1676 "block sizes to prevent splitting to supply demand for smaller " \
1677 "blocks") \
1678 \
1679 product(bool, CMSExtrapolateSweep, false, \
1680 "CMS: cushion for block demand during sweep") \
1681 \
1682 product(uintx, CMS_SweepWeight, 75, \
1683 "Percentage (0-100) used to weight the current sample when " \
1684 "computing exponentially decaying average for inter-sweep " \
1685 "duration") \
1686 \
1687 product(uintx, CMS_SweepPadding, 1, \
1688 "The multiple of deviation from mean to use for buffering " \
1689 "against volatility in inter-sweep duration") \
1690 \
1691 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1692 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1693 "duration exceeds this threshold in milliseconds") \
1694 \
1695 develop(bool, CMSTraceIncrementalMode, false, \
1696 "Trace CMS incremental mode") \
1697 \
1698 develop(bool, CMSTraceIncrementalPacing, false, \
1699 "Trace CMS incremental mode pacing computation") \
1700 \
1701 develop(bool, CMSTraceThreadState, false, \
1702 "Trace the CMS thread state (enable the trace_state() method)") \
1703 \
1704 product(bool, CMSClassUnloadingEnabled, true, \
1705 "Whether class unloading enabled when using CMS GC") \
1706 \
1707 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1708 "When CMS class unloading is enabled, the maximum CMS cycle " \
1709 "count for which classes may not be unloaded") \
1710 \
1711 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1712 "Compact when asked to collect CMS gen with " \
1713 "clear_all_soft_refs()") \
1714 \
1715 product(bool, UseCMSCompactAtFullCollection, true, \
1716 "Use Mark-Sweep-Compact algorithm at full collections") \
1717 \
1718 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1719 "Number of CMS full collection done before compaction if > 0") \
1720 \
1721 develop(intx, CMSDictionaryChoice, 0, \
1722 "Use BinaryTreeDictionary as default in the CMS generation") \
1723 \
1724 product(uintx, CMSIndexedFreeListReplenish, 4, \
1725 "Replenish an indexed free list with this number of chunks") \
1726 \
1727 product(bool, CMSReplenishIntermediate, true, \
1728 "Replenish all intermediate free-list caches") \
1729 \
1730 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1731 "When satisfying batched demand, split blocks from the " \
1732 "IndexedFreeList whose size is a multiple of requested size") \
1733 \
1734 product(bool, CMSLoopWarn, false, \
1735 "Warn in case of excessive CMS looping") \
1736 \
1737 develop(bool, CMSOverflowEarlyRestoration, false, \
1738 "Restore preserved marks early") \
1739 \
1740 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1741 "Size of marking stack") \
1742 \
1743 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1744 "Maximum size of marking stack") \
1745 \
1746 notproduct(bool, CMSMarkStackOverflowALot, false, \
1747 "Simulate frequent marking stack / work queue overflow") \
1748 \
1749 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1750 "An \"interval\" counter that determines how frequently " \
1751 "to simulate overflow; a smaller number increases frequency") \
1752 \
1753 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1754 "Maximum number of abortable preclean iterations, if > 0") \
1755 \
1756 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1757 "Maximum time in abortable preclean (in milliseconds)") \
1758 \
1759 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1760 "Nominal minimum work per abortable preclean iteration") \
1761 \
1762 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1763 "Time that we sleep between iterations when not given " \
1764 "enough work per iteration") \
1765 \
1766 product(uintx, CMSRescanMultiple, 32, \
1767 "Size (in cards) of CMS parallel rescan task") \
1768 \
1769 product(uintx, CMSConcMarkMultiple, 32, \
1770 "Size (in cards) of CMS concurrent MT marking task") \
1771 \
1772 product(bool, CMSAbortSemantics, false, \
1773 "Whether abort-on-overflow semantics is implemented") \
1774 \
1775 product(bool, CMSParallelInitialMarkEnabled, true, \
1776 "Use the parallel initial mark.") \
1777 \
1778 product(bool, CMSParallelRemarkEnabled, true, \
1779 "Whether parallel remark enabled (only if ParNewGC)") \
1780 \
1781 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1782 "Whether parallel remark of survivor space " \
1783 "enabled (effective only if CMSParallelRemarkEnabled)") \
1784 \
1785 product(bool, CMSPLABRecordAlways, true, \
1786 "Always record survivor space PLAB boundaries (effective only " \
1787 "if CMSParallelSurvivorRemarkEnabled)") \
1788 \
1789 product(bool, CMSEdenChunksRecordAlways, true, \
1790 "Always record eden chunks used for the parallel initial mark " \
1791 "or remark of eden") \
1792 \
1793 product(bool, CMSPrintEdenSurvivorChunks, false, \
1794 "Print the eden and the survivor chunks used for the parallel " \
1795 "initial mark or remark of the eden/survivor spaces") \
1796 \
1797 product(bool, CMSConcurrentMTEnabled, true, \
1798 "Whether multi-threaded concurrent work enabled " \
1799 "(effective only if ParNewGC)") \
1800 \
1801 product(bool, CMSPrecleaningEnabled, true, \
1802 "Whether concurrent precleaning enabled") \
1803 \
1804 product(uintx, CMSPrecleanIter, 3, \
1805 "Maximum number of precleaning iteration passes") \
1806 \
1807 product(uintx, CMSPrecleanNumerator, 2, \
1808 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1809 "ratio") \
1810 \
1811 product(uintx, CMSPrecleanDenominator, 3, \
1812 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
1813 "ratio") \
1814 \
1815 product(bool, CMSPrecleanRefLists1, true, \
1816 "Preclean ref lists during (initial) preclean phase") \
1817 \
1818 product(bool, CMSPrecleanRefLists2, false, \
1819 "Preclean ref lists during abortable preclean phase") \
1820 \
1821 product(bool, CMSPrecleanSurvivors1, false, \
1822 "Preclean survivors during (initial) preclean phase") \
1823 \
1824 product(bool, CMSPrecleanSurvivors2, true, \
1825 "Preclean survivors during abortable preclean phase") \
1826 \
1827 product(uintx, CMSPrecleanThreshold, 1000, \
1828 "Do not iterate again if number of dirty cards is less than this")\
1829 \
1830 product(bool, CMSCleanOnEnter, true, \
1831 "Clean-on-enter optimization for reducing number of dirty cards") \
1832 \
1833 product(uintx, CMSRemarkVerifyVariant, 1, \
1834 "Choose variant (1,2) of verification following remark") \
1835 \
1836 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1837 "If Eden size is below this, do not try to schedule remark") \
1838 \
1839 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1840 "The Eden occupancy percentage (0-100) at which " \
1841 "to try and schedule remark pause") \
1842 \
1843 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1844 "Start sampling eden top at least before young gen " \
1845 "occupancy reaches 1/<ratio> of the size at which " \
1846 "we plan to schedule remark") \
1847 \
1848 product(uintx, CMSSamplingGrain, 16*K, \
1849 "The minimum distance between eden samples for CMS (see above)") \
1850 \
1851 product(bool, CMSScavengeBeforeRemark, false, \
1852 "Attempt scavenge before the CMS remark step") \
1853 \
1854 develop(bool, CMSTraceSweeper, false, \
1855 "Trace some actions of the CMS sweeper") \
1856 \
1857 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1858 "Don't drain below this size per parallel worker/thief") \
1859 \
1860 manageable(intx, CMSWaitDuration, 2000, \
1861 "Time in milliseconds that CMS thread waits for young GC") \
1862 \
1863 develop(uintx, CMSCheckInterval, 1000, \
1864 "Interval in milliseconds that CMS thread checks if it " \
1865 "should start a collection cycle") \
1866 \
1867 product(bool, CMSYield, true, \
1868 "Yield between steps of CMS") \
1869 \
1870 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1871 "Bitmap operations should process at most this many bits " \
1872 "between yields") \
1873 \
1874 product(bool, CMSDumpAtPromotionFailure, false, \
1875 "Dump useful information about the state of the CMS old " \
1876 "generation upon a promotion failure") \
1877 \
1878 product(bool, CMSPrintChunksInDump, false, \
1879 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1880 "more detailed information about the free chunks") \
1881 \
1882 product(bool, CMSPrintObjectsInDump, false, \
1883 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1884 "more detailed information about the allocated objects") \
1885 \
1886 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1887 "Verify that all references across the FLS boundary " \
1888 "are to valid objects") \
1889 \
1890 diagnostic(bool, FLSVerifyLists, false, \
1891 "Do lots of (expensive) FreeListSpace verification") \
1892 \
1893 diagnostic(bool, FLSVerifyIndexTable, false, \
1894 "Do lots of (expensive) FLS index table verification") \
1895 \
1896 develop(bool, FLSVerifyDictionary, false, \
1897 "Do lots of (expensive) FLS dictionary verification") \
1898 \
1899 develop(bool, VerifyBlockOffsetArray, false, \
1900 "Do (expensive) block offset array verification") \
1901 \
1902 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1903 "Maintain _unallocated_block in BlockOffsetArray " \
1904 "(currently applicable only to CMS collector)") \
1905 \
1906 develop(bool, TraceCMSState, false, \
1907 "Trace the state of the CMS collection") \
1908 \
1909 product(intx, RefDiscoveryPolicy, 0, \
1910 "Select type of reference discovery policy: " \
1911 "reference-based(0) or referent-based(1)") \
1912 \
1913 product(bool, ParallelRefProcEnabled, false, \
1914 "Enable parallel reference processing whenever possible") \
1915 \
1916 product(bool, ParallelRefProcBalancingEnabled, true, \
1917 "Enable balancing of reference processing queues") \
1918 \
1919 product(uintx, CMSTriggerRatio, 80, \
1920 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1921 "allocated before a CMS collection cycle commences") \
1922 \
1923 product(uintx, CMSBootstrapOccupancy, 50, \
1924 "Percentage CMS generation occupancy at which to " \
1925 "initiate CMS collection for bootstrapping collection stats") \
1926 \
1927 product(intx, CMSInitiatingOccupancyFraction, -1, \
1928 "Percentage CMS generation occupancy to start a CMS collection " \
1929 "cycle. A negative value means that CMSTriggerRatio is used") \
1930 \
1931 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1932 "Percentage of the (entire) heap occupancy to start a " \
1933 "concurrent GC cycle. It is used by GCs that trigger a " \
1934 "concurrent GC cycle based on the occupancy of the entire heap, " \
1935 "not just one of the generations (e.g., G1). A value of 0 " \
1936 "denotes 'do constant GC cycles'.") \
1937 \
1938 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1939 "Only use occupancy as a criterion for starting a CMS collection")\
1940 \
1941 product(uintx, CMSIsTooFullPercentage, 98, \
1942 "An absolute ceiling above which CMS will always consider the " \
1943 "unloading of classes when class unloading is enabled") \
1944 \
1945 develop(bool, CMSTestInFreeList, false, \
1946 "Check if the coalesced range is already in the " \
1947 "free lists as claimed") \
1948 \
1949 notproduct(bool, CMSVerifyReturnedBytes, false, \
1950 "Check that all the garbage collected was returned to the " \
1951 "free lists") \
1952 \
1953 notproduct(bool, ScavengeALot, false, \
1954 "Force scavenge at every Nth exit from the runtime system " \
1955 "(N=ScavengeALotInterval)") \
1956 \
1957 develop(bool, FullGCALot, false, \
1958 "Force full gc at every Nth exit from the runtime system " \
1959 "(N=FullGCALotInterval)") \
1960 \
1961 notproduct(bool, GCALotAtAllSafepoints, false, \
1962 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1963 \
1964 product(bool, PrintPromotionFailure, false, \
1965 "Print additional diagnostic information following " \
1966 "promotion failure") \
1967 \
1968 notproduct(bool, PromotionFailureALot, false, \
1969 "Use promotion failure handling on every youngest generation " \
1970 "collection") \
1971 \
1972 develop(uintx, PromotionFailureALotCount, 1000, \
1973 "Number of promotion failures occurring at ParGCAllocBuffer " \
1974 "refill attempts (ParNew) or promotion attempts " \
1975 "(other young collectors)") \
1976 \
1977 develop(uintx, PromotionFailureALotInterval, 5, \
1978 "Total collections between promotion failures a lot") \
1979 \
1980 experimental(uintx, WorkStealingSleepMillis, 1, \
1981 "Sleep time when sleep is used for yields") \
1982 \
1983 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
1984 "Number of yields before a sleep is done during work stealing") \
1985 \
1986 experimental(uintx, WorkStealingHardSpins, 4096, \
1987 "Number of iterations in a spin loop between checks on " \
1988 "time out of hard spin") \
1989 \
1990 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
1991 "Ratio of hard spins to calls to yield") \
1992 \
1993 develop(uintx, ObjArrayMarkingStride, 512, \
1994 "Number of object array elements to push onto the marking stack " \
1995 "before pushing a continuation entry") \
1996 \
1997 develop(bool, MetadataAllocationFailALot, false, \
1998 "Fail metadata allocations at intervals controlled by " \
1999 "MetadataAllocationFailALotInterval") \
2000 \
2001 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
2002 "Metadata allocation failure a lot interval") \
2003 \
2004 develop(bool, TraceMetadataChunkAllocation, false, \
2005 "Trace chunk metadata allocations") \
2006 \
2007 product(bool, TraceMetadataHumongousAllocation, false, \
2008 "Trace humongous metadata allocations") \
2009 \
2010 develop(bool, TraceMetavirtualspaceAllocation, false, \
2011 "Trace virtual space metadata allocations") \
2012 \
2013 notproduct(bool, ExecuteInternalVMTests, false, \
2014 "Enable execution of internal VM tests") \
2015 \
2016 notproduct(bool, VerboseInternalVMTests, false, \
2017 "Turn on logging for internal VM tests.") \
2018 \
2019 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
2020 \
2021 product_pd(bool, ResizeTLAB, \
2022 "Dynamically resize TLAB size for threads") \
2023 \
2024 product(bool, ZeroTLAB, false, \
2025 "Zero out the newly created TLAB") \
2026 \
2027 product(bool, FastTLABRefill, true, \
2028 "Use fast TLAB refill code") \
2029 \
2030 product(bool, PrintTLAB, false, \
2031 "Print various TLAB related information") \
2032 \
2033 product(bool, TLABStats, true, \
2034 "Provide more detailed and expensive TLAB statistics " \
2035 "(with PrintTLAB)") \
2036 \
2037 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \
2038 "Enable LowMemoryProtection")) \
2039 \
2040 product_pd(bool, NeverActAsServerClassMachine, \
2041 "Never act like a server-class machine") \
2042 \
2043 product(bool, AlwaysActAsServerClassMachine, false, \
2044 "Always act like a server-class machine") \
2045 \
2046 product_pd(uint64_t, MaxRAM, \
2047 "Real memory size (in bytes) used to set maximum heap size") \
2048 \
2049 product(uintx, ErgoHeapSizeLimit, 0, \
2050 "Maximum ergonomically set heap size (in bytes); zero means use " \
2051 "MaxRAM / MaxRAMFraction") \
2052 \
2053 product(uintx, MaxRAMFraction, 4, \
2054 "Maximum fraction (1/n) of real memory used for maximum heap " \
2055 "size") \
2056 \
2057 product(uintx, DefaultMaxRAMFraction, 4, \
2058 "Maximum fraction (1/n) of real memory used for maximum heap " \
2059 "size; deprecated: to be renamed to MaxRAMFraction") \
2060 \
2061 product(uintx, MinRAMFraction, 2, \
2062 "Minimum fraction (1/n) of real memory used for maximum heap " \
2063 "size on systems with small physical memory size") \
2064 \
2065 product(uintx, InitialRAMFraction, 64, \
2066 "Fraction (1/n) of real memory used for initial heap size") \
2067 \
2068 develop(uintx, MaxVirtMemFraction, 2, \
2069 "Maximum fraction (1/n) of virtual memory used for ergonomically "\
2070 "determining maximum heap size") \
2071 \
2072 product(bool, UseAutoGCSelectPolicy, false, \
2073 "Use automatic collection selection policy") \
2074 \
2075 product(uintx, AutoGCSelectPauseMillis, 5000, \
2076 "Automatic GC selection pause threshold in milliseconds") \
2077 \
2078 product(bool, UseAdaptiveSizePolicy, true, \
2079 "Use adaptive generation sizing policies") \
2080 \
2081 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2082 "Use adaptive survivor sizing policies") \
2083 \
2084 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2085 "Use adaptive young-old sizing policies at minor collections") \
2086 \
2087 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2088 "Use adaptive young-old sizing policies at major collections") \
2089 \
2090 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2091 "Include statistics from System.gc() for adaptive size policy") \
2092 \
2093 product(bool, UseAdaptiveGCBoundary, false, \
2094 "Allow young-old boundary to move") \
2095 \
2096 develop(bool, TraceAdaptiveGCBoundary, false, \
2097 "Trace young-old boundary moves") \
2098 \
2099 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2100 "Resize the virtual spaces of the young or old generations") \
2101 \
2102 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2103 "Policy for changing generation size for throughput goals") \
2104 \
2105 product(uintx, AdaptiveSizePausePolicy, 0, \
2106 "Policy for changing generation size for pause goals") \
2107 \
2108 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2109 "Adjust tenured generation to achieve a minor pause goal") \
2110 \
2111 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2112 "Adjust young generation to achieve a major pause goal") \
2113 \
2114 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2115 "Number of steps where heuristics is used before data is used") \
2116 \
2117 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2118 "Number of collections before the adaptive sizing is started") \
2119 \
2120 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2121 "Collection interval for printing information; zero means never") \
2122 \
2123 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2124 "Use adaptive minimum footprint as a goal") \
2125 \
2126 product(uintx, AdaptiveSizePolicyWeight, 10, \
2127 "Weight given to exponential resizing, between 0 and 100") \
2128 \
2129 product(uintx, AdaptiveTimeWeight, 25, \
2130 "Weight given to time in adaptive policy, between 0 and 100") \
2131 \
2132 product(uintx, PausePadding, 1, \
2133 "How much buffer to keep for pause time") \
2134 \
2135 product(uintx, PromotedPadding, 3, \
2136 "How much buffer to keep for promotion failure") \
2137 \
2138 product(uintx, SurvivorPadding, 3, \
2139 "How much buffer to keep for survivor overflow") \
2140 \
2141 product(uintx, ThresholdTolerance, 10, \
2142 "Allowed collection cost difference between generations") \
2143 \
2144 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2145 "If collection costs are within margin, reduce both by full " \
2146 "delta") \
2147 \
2148 product(uintx, YoungGenerationSizeIncrement, 20, \
2149 "Adaptive size percentage change in young generation") \
2150 \
2151 product(uintx, YoungGenerationSizeSupplement, 80, \
2152 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2153 \
2154 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2155 "Decay factor to YoungedGenerationSizeSupplement") \
2156 \
2157 product(uintx, TenuredGenerationSizeIncrement, 20, \
2158 "Adaptive size percentage change in tenured generation") \
2159 \
2160 product(uintx, TenuredGenerationSizeSupplement, 80, \
2161 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2162 \
2163 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2164 "Decay factor to TenuredGenerationSizeIncrement") \
2165 \
2166 product(uintx, MaxGCPauseMillis, max_uintx, \
2167 "Adaptive size policy maximum GC pause time goal in millisecond, "\
2168 "or (G1 Only) the maximum GC time per MMU time slice") \
2169 \
2170 product(uintx, GCPauseIntervalMillis, 0, \
2171 "Time slice for MMU specification") \
2172 \
2173 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2174 "Adaptive size policy maximum GC minor pause time goal " \
2175 "in millisecond") \
2176 \
2177 product(uintx, GCTimeRatio, 99, \
2178 "Adaptive size policy application time to GC time ratio") \
2179 \
2180 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2181 "Adaptive size scale down factor for shrinking") \
2182 \
2183 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2184 "Adaptive size decays the major cost for long major intervals") \
2185 \
2186 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2187 "Time scale over which major costs decay") \
2188 \
2189 product(uintx, MinSurvivorRatio, 3, \
2190 "Minimum ratio of young generation/survivor space size") \
2191 \
2192 product(uintx, InitialSurvivorRatio, 8, \
2193 "Initial ratio of young generation/survivor space size") \
2194 \
2195 product(uintx, BaseFootPrintEstimate, 256*M, \
2196 "Estimate of footprint other than Java Heap") \
2197 \
2198 product(bool, UseGCOverheadLimit, true, \
2199 "Use policy to limit of proportion of time spent in GC " \
2200 "before an OutOfMemory error is thrown") \
2201 \
2202 product(uintx, GCTimeLimit, 98, \
2203 "Limit of the proportion of time spent in GC before " \
2204 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \
2205 \
2206 product(uintx, GCHeapFreeLimit, 2, \
2207 "Minimum percentage of free space after a full GC before an " \
2208 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2209 \
2210 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2211 "Number of consecutive collections before gc time limit fires") \
2212 \
2213 product(bool, PrintAdaptiveSizePolicy, false, \
2214 "Print information about AdaptiveSizePolicy") \
2215 \
2216 product(intx, PrefetchCopyIntervalInBytes, -1, \
2217 "How far ahead to prefetch destination area (<= 0 means off)") \
2218 \
2219 product(intx, PrefetchScanIntervalInBytes, -1, \
2220 "How far ahead to prefetch scan area (<= 0 means off)") \
2221 \
2222 product(intx, PrefetchFieldsAhead, -1, \
2223 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2224 \
2225 diagnostic(bool, VerifySilently, false, \
2226 "Do not print the verification progress") \
2227 \
2228 diagnostic(bool, VerifyDuringStartup, false, \
2229 "Verify memory system before executing any Java code " \
2230 "during VM initialization") \
2231 \
2232 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2233 "Verify system before exiting") \
2234 \
2235 diagnostic(bool, VerifyBeforeGC, false, \
2236 "Verify memory system before GC") \
2237 \
2238 diagnostic(bool, VerifyAfterGC, false, \
2239 "Verify memory system after GC") \
2240 \
2241 diagnostic(bool, VerifyDuringGC, false, \
2242 "Verify memory system during GC (between phases)") \
2243 \
2244 diagnostic(bool, GCParallelVerificationEnabled, true, \
2245 "Enable parallel memory system verification") \
2246 \
2247 diagnostic(bool, DeferInitialCardMark, false, \
2248 "When +ReduceInitialCardMarks, explicitly defer any that " \
2249 "may arise from new_pre_store_barrier") \
2250 \
2251 diagnostic(bool, VerifyRememberedSets, false, \
2252 "Verify GC remembered sets") \
2253 \
2254 diagnostic(bool, VerifyObjectStartArray, true, \
2255 "Verify GC object start array if verify before/after") \
2256 \
2257 product(bool, DisableExplicitGC, false, \
2258 "Ignore calls to System.gc()") \
2259 \
2260 notproduct(bool, CheckMemoryInitialization, false, \
2261 "Check memory initialization") \
2262 \
2263 product(bool, CollectGen0First, false, \
2264 "Collect youngest generation before each full GC") \
2265 \
2266 diagnostic(bool, BindCMSThreadToCPU, false, \
2267 "Bind CMS Thread to CPU if possible") \
2268 \
2269 diagnostic(uintx, CPUForCMSThread, 0, \
2270 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2271 \
2272 product(bool, BindGCTaskThreadsToCPUs, false, \
2273 "Bind GCTaskThreads to CPUs if possible") \
2274 \
2275 product(bool, UseGCTaskAffinity, false, \
2276 "Use worker affinity when asking for GCTasks") \
2277 \
2278 product(uintx, ProcessDistributionStride, 4, \
2279 "Stride through processors when distributing processes") \
2280 \
2281 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2282 "Number of times the coordinator GC thread will sleep while " \
2283 "yielding before giving up and resuming GC") \
2284 \
2285 product(uintx, CMSYieldSleepCount, 0, \
2286 "Number of times a GC thread (minus the coordinator) " \
2287 "will sleep while yielding before giving up and resuming GC") \
2288 \
2289 /* gc tracing */ \
2290 manageable(bool, PrintGC, false, \
2291 "Print message at garbage collection") \
2292 \
2293 manageable(bool, PrintGCDetails, false, \
2294 "Print more details at garbage collection") \
2295 \
2296 manageable(bool, PrintGCDateStamps, false, \
2297 "Print date stamps at garbage collection") \
2298 \
2299 manageable(bool, PrintGCTimeStamps, false, \
2300 "Print timestamps at garbage collection") \
2301 \
2302 product(bool, PrintGCTaskTimeStamps, false, \
2303 "Print timestamps for individual gc worker thread tasks") \
2304 \
2305 develop(intx, ConcGCYieldTimeout, 0, \
2306 "If non-zero, assert that GC threads yield within this " \
2307 "number of milliseconds") \
2308 \
2309 notproduct(bool, TraceMarkSweep, false, \
2310 "Trace mark sweep") \
2311 \
2312 product(bool, PrintReferenceGC, false, \
2313 "Print times spent handling reference objects during GC " \
2314 "(enabled only when PrintGCDetails)") \
2315 \
2316 develop(bool, TraceReferenceGC, false, \
2317 "Trace handling of soft/weak/final/phantom references") \
2318 \
2319 develop(bool, TraceFinalizerRegistration, false, \
2320 "Trace registration of final references") \
2321 \
2322 notproduct(bool, TraceScavenge, false, \
2323 "Trace scavenge") \
2324 \
2325 product_rw(bool, TraceClassLoading, false, \
2326 "Trace all classes loaded") \
2327 \
2328 product(bool, TraceClassLoadingPreorder, false, \
2329 "Trace all classes loaded in order referenced (not loaded)") \
2330 \
2331 product_rw(bool, TraceClassUnloading, false, \
2332 "Trace unloading of classes") \
2333 \
2334 product_rw(bool, TraceLoaderConstraints, false, \
2335 "Trace loader constraints") \
2336 \
2337 develop(bool, TraceClassLoaderData, false, \
2338 "Trace class loader loader_data lifetime") \
2339 \
2340 product(uintx, InitialBootClassLoaderMetaspaceSize, \
2341 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2342 "Initial size of the boot class loader data metaspace") \
2343 \
2344 product(bool, TraceGen0Time, false, \
2345 "Trace accumulated time for Gen 0 collection") \
2346 \
2347 product(bool, TraceGen1Time, false, \
2348 "Trace accumulated time for Gen 1 collection") \
2349 \
2350 product(bool, PrintTenuringDistribution, false, \
2351 "Print tenuring age information") \
2352 \
2353 product_rw(bool, PrintHeapAtGC, false, \
2354 "Print heap layout before and after each GC") \
2355 \
2356 product_rw(bool, PrintHeapAtGCExtended, false, \
2357 "Print extended information about the layout of the heap " \
2358 "when -XX:+PrintHeapAtGC is set") \
2359 \
2360 product(bool, PrintHeapAtSIGBREAK, true, \
2361 "Print heap layout in response to SIGBREAK") \
2362 \
2363 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2364 "Print a class histogram before any major stop-world GC") \
2365 \
2366 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2367 "Print a class histogram after any major stop-world GC") \
2368 \
2369 manageable(bool, PrintClassHistogram, false, \
2370 "Print a histogram of class instances") \
2371 \
2372 develop(bool, TraceWorkGang, false, \
2373 "Trace activities of work gangs") \
2374 \
2375 product(bool, TraceParallelOldGCTasks, false, \
2376 "Trace multithreaded GC activity") \
2377 \
2378 develop(bool, TraceBlockOffsetTable, false, \
2379 "Print BlockOffsetTable maps") \
2380 \
2381 develop(bool, TraceCardTableModRefBS, false, \
2382 "Print CardTableModRefBS maps") \
2383 \
2384 develop(bool, TraceGCTaskManager, false, \
2385 "Trace actions of the GC task manager") \
2386 \
2387 develop(bool, TraceGCTaskQueue, false, \
2388 "Trace actions of the GC task queues") \
2389 \
2390 diagnostic(bool, TraceGCTaskThread, false, \
2391 "Trace actions of the GC task threads") \
2392 \
2393 product(bool, PrintParallelOldGCPhaseTimes, false, \
2394 "Print the time taken by each phase in ParallelOldGC " \
2395 "(PrintGCDetails must also be enabled)") \
2396 \
2397 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2398 "Trace marking phase in ParallelOldGC") \
2399 \
2400 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2401 "Trace summary phase in ParallelOldGC") \
2402 \
2403 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2404 "Trace compaction phase in ParallelOldGC") \
2405 \
2406 develop(bool, TraceParallelOldGCDensePrefix, false, \
2407 "Trace dense prefix computation for ParallelOldGC") \
2408 \
2409 develop(bool, IgnoreLibthreadGPFault, false, \
2410 "Suppress workaround for libthread GP fault") \
2411 \
2412 product(bool, PrintJNIGCStalls, false, \
2413 "Print diagnostic message when GC is stalled " \
2414 "by JNI critical section") \
2415 \
2416 experimental(double, ObjectCountCutOffPercent, 0.5, \
2417 "The percentage of the used heap that the instances of a class " \
2418 "must occupy for the class to generate a trace event") \
2419 \
2420 /* GC log rotation setting */ \
2421 \
2422 product(bool, UseGCLogFileRotation, false, \
2423 "Rotate gclog files (for long running applications). It requires "\
2424 "-Xloggc:<filename>") \
2425 \
2426 product(uintx, NumberOfGCLogFiles, 0, \
2427 "Number of gclog files in rotation " \
2428 "(default: 0, no rotation)") \
2429 \
2430 product(uintx, GCLogFileSize, 8*K, \
2431 "GC log file size, requires UseGCLogFileRotation. " \
2432 "Set to 0 to only trigger rotation via jcmd") \
2433 \
2434 /* JVMTI heap profiling */ \
2435 \
2436 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2437 "Trace JVMTI object tagging calls") \
2438 \
2439 diagnostic(bool, VerifyBeforeIteration, false, \
2440 "Verify memory system before JVMTI iteration") \
2441 \
2442 /* compiler interface */ \
2443 \
2444 develop(bool, CIPrintCompilerName, false, \
2445 "when CIPrint is active, print the name of the active compiler") \
2446 \
2447 develop(bool, CIPrintCompileQueue, false, \
2448 "display the contents of the compile queue whenever a " \
2449 "compilation is enqueued") \
2450 \
2451 develop(bool, CIPrintRequests, false, \
2452 "display every request for compilation") \
2453 \
2454 product(bool, CITime, false, \
2455 "collect timing information for compilation") \
2456 \
2457 develop(bool, CITimeEach, false, \
2458 "display timing information after each successful compilation") \
2459 \
2460 develop(bool, CICountOSR, false, \
2461 "use a separate counter when assigning ids to osr compilations") \
2462 \
2463 develop(bool, CICompileNatives, true, \
2464 "compile native methods if supported by the compiler") \
2465 \
2466 develop_pd(bool, CICompileOSR, \
2467 "compile on stack replacement methods if supported by the " \
2468 "compiler") \
2469 \
2470 develop(bool, CIPrintMethodCodes, false, \
2471 "print method bytecodes of the compiled code") \
2472 \
2473 develop(bool, CIPrintTypeFlow, false, \
2474 "print the results of ciTypeFlow analysis") \
2475 \
2476 develop(bool, CITraceTypeFlow, false, \
2477 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2478 \
2479 develop(intx, OSROnlyBCI, -1, \
2480 "OSR only at this bci. Negative values mean exclude that bci") \
2481 \
2482 /* compiler */ \
2483 \
2484 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2485 "Number of compiler threads to run") \
2486 \
2487 product(intx, CompilationPolicyChoice, 0, \
2488 "which compilation policy (0/1)") \
2489 \
2490 develop(bool, UseStackBanging, true, \
2491 "use stack banging for stack overflow checks (required for " \
2492 "proper StackOverflow handling; disable only to measure cost " \
2493 "of stackbanging)") \
2494 \
2495 develop(bool, UseStrictFP, true, \
2496 "use strict fp if modifier strictfp is set") \
2497 \
2498 develop(bool, GenerateSynchronizationCode, true, \
2499 "generate locking/unlocking code for synchronized methods and " \
2500 "monitors") \
2501 \
2502 develop(bool, GenerateCompilerNullChecks, true, \
2503 "Generate explicit null checks for loads/stores/calls") \
2504 \
2505 develop(bool, GenerateRangeChecks, true, \
2506 "Generate range checks for array accesses") \
2507 \
2508 develop_pd(bool, ImplicitNullChecks, \
2509 "Generate code for implicit null checks") \
2510 \
2511 product_pd(bool, TrapBasedNullChecks, \
2512 "Generate code for null checks that uses a cmp and trap " \
2513 "instruction raising SIGTRAP. This is only used if an access to" \
2514 "null (+offset) will not raise a SIGSEGV, i.e.," \
2515 "ImplicitNullChecks don't work (PPC64).") \
2516 \
2517 product(bool, PrintSafepointStatistics, false, \
2518 "Print statistics about safepoint synchronization") \
2519 \
2520 product(intx, PrintSafepointStatisticsCount, 300, \
2521 "Total number of safepoint statistics collected " \
2522 "before printing them out") \
2523 \
2524 product(intx, PrintSafepointStatisticsTimeout, -1, \
2525 "Print safepoint statistics only when safepoint takes " \
2526 "more than PrintSafepointSatisticsTimeout in millis") \
2527 \
2528 product(bool, TraceSafepointCleanupTime, false, \
2529 "Print the break down of clean up tasks performed during " \
2530 "safepoint") \
2531 \
2532 product(bool, Inline, true, \
2533 "Enable inlining") \
2534 \
2535 product(bool, ClipInlining, true, \
2536 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
2537 \
2538 develop(bool, UseCHA, true, \
2539 "Enable CHA") \
2540 \
2541 product(bool, UseTypeProfile, true, \
2542 "Check interpreter profile for historically monomorphic calls") \
2543 \
2544 notproduct(bool, TimeCompiler, false, \
2545 "Time the compiler") \
2546 \
2547 diagnostic(bool, PrintInlining, false, \
2548 "Print inlining optimizations") \
2549 \
2550 product(bool, UsePopCountInstruction, false, \
2551 "Use population count instruction") \
2552 \
2553 develop(bool, EagerInitialization, false, \
2554 "Eagerly initialize classes if possible") \
2555 \
2556 develop(bool, TraceMethodReplacement, false, \
2557 "Print when methods are replaced do to recompilation") \
2558 \
2559 develop(bool, PrintMethodFlushing, false, \
2560 "Print the nmethods being flushed") \
2561 \
2562 diagnostic(bool, PrintMethodFlushingStatistics, false, \
2563 "print statistics about method flushing") \
2564 \
2565 develop(bool, UseRelocIndex, false, \
2566 "Use an index to speed random access to relocations") \
2567 \
2568 develop(bool, StressCodeBuffers, false, \
2569 "Exercise code buffer expansion and other rare state changes") \
2570 \
2571 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2572 "Generate extra debugging information for non-safepoints in " \
2573 "nmethods") \
2574 \
2575 product(bool, PrintVMOptions, false, \
2576 "Print flags that appeared on the command line") \
2577 \
2578 product(bool, IgnoreUnrecognizedVMOptions, false, \
2579 "Ignore unrecognized VM options") \
2580 \
2581 product(bool, PrintCommandLineFlags, false, \
2582 "Print flags specified on command line or set by ergonomics") \
2583 \
2584 product(bool, PrintFlagsInitial, false, \
2585 "Print all VM flags before argument processing and exit VM") \
2586 \
2587 product(bool, PrintFlagsFinal, false, \
2588 "Print all VM flags after argument and ergonomic processing") \
2589 \
2590 notproduct(bool, PrintFlagsWithComments, false, \
2591 "Print all VM flags with default values and descriptions and " \
2592 "exit") \
2593 \
2594 diagnostic(bool, SerializeVMOutput, true, \
2595 "Use a mutex to serialize output to tty and LogFile") \
2596 \
2597 diagnostic(bool, DisplayVMOutput, true, \
2598 "Display all VM output on the tty, independently of LogVMOutput") \
2599 \
2600 diagnostic(bool, LogVMOutput, false, \
2601 "Save VM output to LogFile") \
2602 \
2603 diagnostic(ccstr, LogFile, NULL, \
2604 "If LogVMOutput or LogCompilation is on, save VM output to " \
2605 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
2606 \
2607 product(ccstr, ErrorFile, NULL, \
2608 "If an error occurs, save the error data to this file " \
2609 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2610 \
2611 product(bool, DisplayVMOutputToStderr, false, \
2612 "If DisplayVMOutput is true, display all VM output to stderr") \
2613 \
2614 product(bool, DisplayVMOutputToStdout, false, \
2615 "If DisplayVMOutput is true, display all VM output to stdout") \
2616 \
2617 product(bool, UseHeavyMonitors, false, \
2618 "use heavyweight instead of lightweight Java monitors") \
2619 \
2620 product(bool, PrintStringTableStatistics, false, \
2621 "print statistics about the StringTable and SymbolTable") \
2622 \
2623 diagnostic(bool, VerifyStringTableAtExit, false, \
2624 "verify StringTable contents at exit") \
2625 \
2626 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2627 "print histogram of the symbol table") \
2628 \
2629 notproduct(bool, ExitVMOnVerifyError, false, \
2630 "standard exit from VM if bytecode verify error " \
2631 "(only in debug mode)") \
2632 \
2633 notproduct(ccstr, AbortVMOnException, NULL, \
2634 "Call fatal if this exception is thrown. Example: " \
2635 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2636 \
2637 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2638 "Call fatal if the exception pointed by AbortVMOnException " \
2639 "has this message") \
2640 \
2641 develop(bool, DebugVtables, false, \
2642 "add debugging code to vtable dispatch") \
2643 \
2644 develop(bool, PrintVtables, false, \
2645 "print vtables when printing klass") \
2646 \
2647 notproduct(bool, PrintVtableStats, false, \
2648 "print vtables stats at end of run") \
2649 \
2650 develop(bool, TraceCreateZombies, false, \
2651 "trace creation of zombie nmethods") \
2652 \
2653 notproduct(bool, IgnoreLockingAssertions, false, \
2654 "disable locking assertions (for speed)") \
2655 \
2656 product(bool, RangeCheckElimination, true, \
2657 "Eliminate range checks") \
2658 \
2659 develop_pd(bool, UncommonNullCast, \
2660 "track occurrences of null in casts; adjust compiler tactics") \
2661 \
2662 develop(bool, TypeProfileCasts, true, \
2663 "treat casts like calls for purposes of type profiling") \
2664 \
2665 develop(bool, DelayCompilationDuringStartup, true, \
2666 "Delay invoking the compiler until main application class is " \
2667 "loaded") \
2668 \
2669 develop(bool, CompileTheWorld, false, \
2670 "Compile all methods in all classes in bootstrap class path " \
2671 "(stress test)") \
2672 \
2673 develop(bool, CompileTheWorldPreloadClasses, true, \
2674 "Preload all classes used by a class before start loading") \
2675 \
2676 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2677 "Force a safepoint every n compiles so sweeper can keep up") \
2678 \
2679 develop(bool, FillDelaySlots, true, \
2680 "Fill delay slots (on SPARC only)") \
2681 \
2682 develop(bool, TimeLivenessAnalysis, false, \
2683 "Time computation of bytecode liveness analysis") \
2684 \
2685 develop(bool, TraceLivenessGen, false, \
2686 "Trace the generation of liveness analysis information") \
2687 \
2688 notproduct(bool, TraceLivenessQuery, false, \
2689 "Trace queries of liveness analysis information") \
2690 \
2691 notproduct(bool, CollectIndexSetStatistics, false, \
2692 "Collect information about IndexSets") \
2693 \
2694 develop(bool, UseLoopSafepoints, true, \
2695 "Generate Safepoint nodes in every loop") \
2696 \
2697 develop(intx, FastAllocateSizeLimit, 128*K, \
2698 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2699 "Inline allocations larger than this in doublewords must go slow")\
2700 \
2701 product(bool, AggressiveOpts, false, \
2702 "Enable aggressive optimizations - see arguments.cpp") \
2703 \
2704 product_pd(uintx, TypeProfileLevel, \
2705 "=XYZ, with Z: Type profiling of arguments at call; " \
2706 "Y: Type profiling of return value at call; " \
2707 "X: Type profiling of parameters to methods; " \
2708 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
2709 \
2710 product(intx, TypeProfileArgsLimit, 2, \
2711 "max number of call arguments to consider for type profiling") \
2712 \
2713 product(intx, TypeProfileParmsLimit, 2, \
2714 "max number of incoming parameters to consider for type profiling"\
2715 ", -1 for all") \
2716 \
2717 /* statistics */ \
2718 develop(bool, CountCompiledCalls, false, \
2719 "Count method invocations") \
2720 \
2721 notproduct(bool, CountRuntimeCalls, false, \
2722 "Count VM runtime calls") \
2723 \
2724 develop(bool, CountJNICalls, false, \
2725 "Count jni method invocations") \
2726 \
2727 notproduct(bool, CountJVMCalls, false, \
2728 "Count jvm method invocations") \
2729 \
2730 notproduct(bool, CountRemovableExceptions, false, \
2731 "Count exceptions that could be replaced by branches due to " \
2732 "inlining") \
2733 \
2734 notproduct(bool, ICMissHistogram, false, \
2735 "Produce histogram of IC misses") \
2736 \
2737 notproduct(bool, PrintClassStatistics, false, \
2738 "Print class statistics at end of run") \
2739 \
2740 notproduct(bool, PrintMethodStatistics, false, \
2741 "Print method statistics at end of run") \
2742 \
2743 /* interpreter */ \
2744 develop(bool, ClearInterpreterLocals, false, \
2745 "Always clear local variables of interpreter activations upon " \
2746 "entry") \
2747 \
2748 product_pd(bool, RewriteBytecodes, \
2749 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2750 \
2751 product_pd(bool, RewriteFrequentPairs, \
2752 "Rewrite frequently used bytecode pairs into a single bytecode") \
2753 \
2754 diagnostic(bool, PrintInterpreter, false, \
2755 "Print the generated interpreter code") \
2756 \
2757 product(bool, UseInterpreter, true, \
2758 "Use interpreter for non-compiled methods") \
2759 \
2760 develop(bool, UseFastSignatureHandlers, true, \
2761 "Use fast signature handlers for native calls") \
2762 \
2763 product(bool, UseLoopCounter, true, \
2764 "Increment invocation counter on backward branch") \
2765 \
2766 product(bool, UseFastEmptyMethods, true, \
2767 "Use fast method entry code for empty methods") \
2768 \
2769 product(bool, UseFastAccessorMethods, true, \
2770 "Use fast method entry code for accessor methods") \
2771 \
2772 product_pd(bool, UseOnStackReplacement, \
2773 "Use on stack replacement, calls runtime if invoc. counter " \
2774 "overflows in loop") \
2775 \
2776 notproduct(bool, TraceOnStackReplacement, false, \
2777 "Trace on stack replacement") \
2778 \
2779 product_pd(bool, PreferInterpreterNativeStubs, \
2780 "Use always interpreter stubs for native methods invoked via " \
2781 "interpreter") \
2782 \
2783 develop(bool, CountBytecodes, false, \
2784 "Count number of bytecodes executed") \
2785 \
2786 develop(bool, PrintBytecodeHistogram, false, \
2787 "Print histogram of the executed bytecodes") \
2788 \
2789 develop(bool, PrintBytecodePairHistogram, false, \
2790 "Print histogram of the executed bytecode pairs") \
2791 \
2792 diagnostic(bool, PrintSignatureHandlers, false, \
2793 "Print code generated for native method signature handlers") \
2794 \
2795 develop(bool, VerifyOops, false, \
2796 "Do plausibility checks for oops") \
2797 \
2798 develop(bool, CheckUnhandledOops, false, \
2799 "Check for unhandled oops in VM code") \
2800 \
2801 develop(bool, VerifyJNIFields, trueInDebug, \
2802 "Verify jfieldIDs for instance fields") \
2803 \
2804 notproduct(bool, VerifyJNIEnvThread, false, \
2805 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2806 "from JNI") \
2807 \
2808 develop(bool, VerifyFPU, false, \
2809 "Verify FPU state (check for NaN's, etc.)") \
2810 \
2811 develop(bool, VerifyThread, false, \
2812 "Watch the thread register for corruption (SPARC only)") \
2813 \
2814 develop(bool, VerifyActivationFrameSize, false, \
2815 "Verify that activation frame didn't become smaller than its " \
2816 "minimal size") \
2817 \
2818 develop(bool, TraceFrequencyInlining, false, \
2819 "Trace frequency based inlining") \
2820 \
2821 develop_pd(bool, InlineIntrinsics, \
2822 "Inline intrinsics that can be statically resolved") \
2823 \
2824 product_pd(bool, ProfileInterpreter, \
2825 "Profile at the bytecode level during interpretation") \
2826 \
2827 develop(bool, TraceProfileInterpreter, false, \
2828 "Trace profiling at the bytecode level during interpretation. " \
2829 "This outputs the profiling information collected to improve " \
2830 "jit compilation.") \
2831 \
2832 develop_pd(bool, ProfileTraps, \
2833 "Profile deoptimization traps at the bytecode level") \
2834 \
2835 product(intx, ProfileMaturityPercentage, 20, \
2836 "number of method invocations/branches (expressed as % of " \
2837 "CompileThreshold) before using the method's profile") \
2838 \
2839 diagnostic(bool, PrintMethodData, false, \
2840 "Print the results of +ProfileInterpreter at end of run") \
2841 \
2842 develop(bool, VerifyDataPointer, trueInDebug, \
2843 "Verify the method data pointer during interpreter profiling") \
2844 \
2845 develop(bool, VerifyCompiledCode, false, \
2846 "Include miscellaneous runtime verifications in nmethod code; " \
2847 "default off because it disturbs nmethod size heuristics") \
2848 \
2849 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2850 "Manually make GC thread crash then dump java stack trace; " \
2851 "Test only") \
2852 \
2853 /* compilation */ \
2854 product(bool, UseCompiler, true, \
2855 "Use Just-In-Time compilation") \
2856 \
2857 develop(bool, TraceCompilationPolicy, false, \
2858 "Trace compilation policy") \
2859 \
2860 develop(bool, TimeCompilationPolicy, false, \
2861 "Time the compilation policy") \
2862 \
2863 product(bool, UseCounterDecay, true, \
2864 "Adjust recompilation counters") \
2865 \
2866 develop(intx, CounterHalfLifeTime, 30, \
2867 "Half-life time of invocation counters (in seconds)") \
2868 \
2869 develop(intx, CounterDecayMinIntervalLength, 500, \
2870 "The minimum interval (in milliseconds) between invocation of " \
2871 "CounterDecay") \
2872 \
2873 product(bool, AlwaysCompileLoopMethods, false, \
2874 "When using recompilation, never interpret methods " \
2875 "containing loops") \
2876 \
2877 product(bool, DontCompileHugeMethods, true, \
2878 "Do not compile methods > HugeMethodLimit") \
2879 \
2880 /* Bytecode escape analysis estimation. */ \
2881 product(bool, EstimateArgEscape, true, \
2882 "Analyze bytecodes to estimate escape state of arguments") \
2883 \
2884 product(intx, BCEATraceLevel, 0, \
2885 "How much tracing to do of bytecode escape analysis estimates") \
2886 \
2887 product(intx, MaxBCEAEstimateLevel, 5, \
2888 "Maximum number of nested calls that are analyzed by BC EA") \
2889 \
2890 product(intx, MaxBCEAEstimateSize, 150, \
2891 "Maximum bytecode size of a method to be analyzed by BC EA") \
2892 \
2893 product(intx, AllocatePrefetchStyle, 1, \
2894 "0 = no prefetch, " \
2895 "1 = prefetch instructions for each allocation, " \
2896 "2 = use TLAB watermark to gate allocation prefetch, " \
2897 "3 = use BIS instruction on Sparc for allocation prefetch") \
2898 \
2899 product(intx, AllocatePrefetchDistance, -1, \
2900 "Distance to prefetch ahead of allocation pointer") \
2901 \
2902 product(intx, AllocatePrefetchLines, 3, \
2903 "Number of lines to prefetch ahead of array allocation pointer") \
2904 \
2905 product(intx, AllocateInstancePrefetchLines, 1, \
2906 "Number of lines to prefetch ahead of instance allocation " \
2907 "pointer") \
2908 \
2909 product(intx, AllocatePrefetchStepSize, 16, \
2910 "Step size in bytes of sequential prefetch instructions") \
2911 \
2912 product(intx, AllocatePrefetchInstr, 0, \
2913 "Prefetch instruction to prefetch ahead of allocation pointer") \
2914 \
2915 /* deoptimization */ \
2916 develop(bool, TraceDeoptimization, false, \
2917 "Trace deoptimization") \
2918 \
2919 develop(bool, DebugDeoptimization, false, \
2920 "Tracing various information while debugging deoptimization") \
2921 \
2922 product(intx, SelfDestructTimer, 0, \
2923 "Will cause VM to terminate after a given time (in minutes) " \
2924 "(0 means off)") \
2925 \
2926 product(intx, MaxJavaStackTraceDepth, 1024, \
2927 "The maximum number of lines in the stack trace for Java " \
2928 "exceptions (0 means all)") \
2929 \
2930 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
2931 "Guarantee a safepoint (at least) every so many milliseconds " \
2932 "(0 means none)")) \
2933 \
2934 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
2935 "Guarantee a safepoint (at least) every so many milliseconds " \
2936 "(0 means none)")) \
2937 \
2938 product(intx, SafepointTimeoutDelay, 10000, \
2939 "Delay in milliseconds for option SafepointTimeout") \
2940 \
2941 product(intx, NmethodSweepFraction, 16, \
2942 "Number of invocations of sweeper to cover all nmethods") \
2943 \
2944 product(intx, NmethodSweepCheckInterval, 5, \
2945 "Compilers wake up every n seconds to possibly sweep nmethods") \
2946 \
2947 product(intx, NmethodSweepActivity, 10, \
2948 "Removes cold nmethods from code cache if > 0. Higher values " \
2949 "result in more aggressive sweeping") \
2950 \
2951 notproduct(bool, LogSweeper, false, \
2952 "Keep a ring buffer of sweeper activity") \
2953 \
2954 notproduct(intx, SweeperLogEntries, 1024, \
2955 "Number of records in the ring buffer of sweeper activity") \
2956 \
2957 notproduct(intx, MemProfilingInterval, 500, \
2958 "Time between each invocation of the MemProfiler") \
2959 \
2960 develop(intx, MallocCatchPtr, -1, \
2961 "Hit breakpoint when mallocing/freeing this pointer") \
2962 \
2963 notproduct(intx, AssertRepeat, 1, \
2964 "number of times to evaluate expression in assert " \
2965 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2966 \
2967 notproduct(ccstrlist, SuppressErrorAt, "", \
2968 "List of assertions (file:line) to muzzle") \
2969 \
2970 notproduct(uintx, HandleAllocationLimit, 1024, \
2971 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2972 "is used") \
2973 \
2974 develop(uintx, TotalHandleAllocationLimit, 1024, \
2975 "Threshold for total handle allocation when " \
2976 "+TraceHandleAllocation is used") \
2977 \
2978 develop(intx, StackPrintLimit, 100, \
2979 "number of stack frames to print in VM-level stack dump") \
2980 \
2981 notproduct(intx, MaxElementPrintSize, 256, \
2982 "maximum number of elements to print") \
2983 \
2984 notproduct(intx, MaxSubklassPrintSize, 4, \
2985 "maximum number of subklasses to print when printing klass") \
2986 \
2987 product(intx, MaxInlineLevel, 9, \
2988 "maximum number of nested calls that are inlined") \
2989 \
2990 product(intx, MaxRecursiveInlineLevel, 1, \
2991 "maximum number of nested recursive calls that are inlined") \
2992 \
2993 develop(intx, MaxForceInlineLevel, 100, \
2994 "maximum number of nested calls that are forced for inlining " \
2995 "(using CompilerOracle or marked w/ @ForceInline)") \
2996 \
2997 product_pd(intx, InlineSmallCode, \
2998 "Only inline already compiled methods if their code size is " \
2999 "less than this") \
3000 \
3001 product(intx, MaxInlineSize, 35, \
3002 "The maximum bytecode size of a method to be inlined") \
3003 \
3004 product_pd(intx, FreqInlineSize, \
3005 "The maximum bytecode size of a frequent method to be inlined") \
3006 \
3007 product(intx, MaxTrivialSize, 6, \
3008 "The maximum bytecode size of a trivial method to be inlined") \
3009 \
3010 product(intx, MinInliningThreshold, 250, \
3011 "The minimum invocation count a method needs to have to be " \
3012 "inlined") \
3013 \
3014 develop(intx, MethodHistogramCutoff, 100, \
3015 "The cutoff value for method invocation histogram (+CountCalls)") \
3016 \
3017 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
3018 "Number of interpreted methods to show in profile") \
3019 \
3020 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
3021 "Number of compiled methods to show in profile") \
3022 \
3023 develop(intx, ProfilerNumberOfStubMethods, 25, \
3024 "Number of stub methods to show in profile") \
3025 \
3026 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
3027 "Number of runtime stub nodes to show in profile") \
3028 \
3029 product(intx, ProfileIntervalsTicks, 100, \
3030 "Number of ticks between printing of interval profile " \
3031 "(+ProfileIntervals)") \
3032 \
3033 notproduct(intx, ScavengeALotInterval, 1, \
3034 "Interval between which scavenge will occur with +ScavengeALot") \
3035 \
3036 notproduct(intx, FullGCALotInterval, 1, \
3037 "Interval between which full gc will occur with +FullGCALot") \
3038 \
3039 notproduct(intx, FullGCALotStart, 0, \
3040 "For which invocation to start FullGCAlot") \
3041 \
3042 notproduct(intx, FullGCALotDummies, 32*K, \
3043 "Dummy object allocated with +FullGCALot, forcing all objects " \
3044 "to move") \
3045 \
3046 develop(intx, DontYieldALotInterval, 10, \
3047 "Interval between which yields will be dropped (milliseconds)") \
3048 \
3049 develop(intx, MinSleepInterval, 1, \
3050 "Minimum sleep() interval (milliseconds) when " \
3051 "ConvertSleepToYield is off (used for Solaris)") \
3052 \
3053 develop(intx, ProfilerPCTickThreshold, 15, \
3054 "Number of ticks in a PC buckets to be a hotspot") \
3055 \
3056 notproduct(intx, DeoptimizeALotInterval, 5, \
3057 "Number of exits until DeoptimizeALot kicks in") \
3058 \
3059 notproduct(intx, ZombieALotInterval, 5, \
3060 "Number of exits until ZombieALot kicks in") \
3061 \
3062 diagnostic(intx, MallocVerifyInterval, 0, \
3063 "If non-zero, verify C heap after every N calls to " \
3064 "malloc/realloc/free") \
3065 \
3066 diagnostic(intx, MallocVerifyStart, 0, \
3067 "If non-zero, start verifying C heap after Nth call to " \
3068 "malloc/realloc/free") \
3069 \
3070 diagnostic(uintx, MallocMaxTestWords, 0, \
3071 "If non-zero, maximum number of words that malloc/realloc can " \
3072 "allocate (for testing only)") \
3073 \
3074 product(intx, TypeProfileWidth, 2, \
3075 "Number of receiver types to record in call/cast profile") \
3076 \
3077 develop(intx, BciProfileWidth, 2, \
3078 "Number of return bci's to record in ret profile") \
3079 \
3080 product(intx, PerMethodRecompilationCutoff, 400, \
3081 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3082 \
3083 product(intx, PerBytecodeRecompilationCutoff, 200, \
3084 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3085 \
3086 product(intx, PerMethodTrapLimit, 100, \
3087 "Limit on traps (of one kind) in a method (includes inlines)") \
3088 \
3089 experimental(intx, PerMethodSpecTrapLimit, 5000, \
3090 "Limit on speculative traps (of one kind) in a method (includes inlines)") \
3091 \
3092 product(intx, PerBytecodeTrapLimit, 4, \
3093 "Limit on traps (of one kind) at a particular BCI") \
3094 \
3095 experimental(intx, SpecTrapLimitExtraEntries, 3, \
3096 "Extra method data trap entries for speculation") \
3097 \
3098 develop(intx, InlineFrequencyRatio, 20, \
3099 "Ratio of call site execution to caller method invocation") \
3100 \
3101 develop_pd(intx, InlineFrequencyCount, \
3102 "Count of call site execution necessary to trigger frequent " \
3103 "inlining") \
3104 \
3105 develop(intx, InlineThrowCount, 50, \
3106 "Force inlining of interpreted methods that throw this often") \
3107 \
3108 develop(intx, InlineThrowMaxSize, 200, \
3109 "Force inlining of throwing methods smaller than this") \
3110 \
3111 develop(intx, ProfilerNodeSize, 1024, \
3112 "Size in K to allocate for the Profile Nodes of each thread") \
3113 \
3114 product_pd(intx, PreInflateSpin, \
3115 "Number of times to spin wait before inflation") \
3116 \
3117 /* gc parameters */ \
3118 product(uintx, InitialHeapSize, 0, \
3119 "Initial heap size (in bytes); zero means use ergonomics") \
3120 \
3121 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
3122 "Maximum heap size (in bytes)") \
3123 \
3124 product(uintx, OldSize, ScaleForWordSize(4*M), \
3125 "Initial tenured generation size (in bytes)") \
3126 \
3127 product(uintx, NewSize, ScaleForWordSize(1*M), \
3128 "Initial new generation size (in bytes)") \
3129 \
3130 product(uintx, MaxNewSize, max_uintx, \
3131 "Maximum new generation size (in bytes), max_uintx means set " \
3132 "ergonomically") \
3133 \
3134 product(uintx, PretenureSizeThreshold, 0, \
3135 "Maximum size in bytes of objects allocated in DefNew " \
3136 "generation; zero means no maximum") \
3137 \
3138 product(uintx, TLABSize, 0, \
3139 "Starting TLAB size (in bytes); zero means set ergonomically") \
3140 \
3141 product(uintx, MinTLABSize, 2*K, \
3142 "Minimum allowed TLAB size (in bytes)") \
3143 \
3144 product(uintx, TLABAllocationWeight, 35, \
3145 "Allocation averaging weight") \
3146 \
3147 product(uintx, TLABWasteTargetPercent, 1, \
3148 "Percentage of Eden that can be wasted") \
3149 \
3150 product(uintx, TLABRefillWasteFraction, 64, \
3151 "Maximum TLAB waste at a refill (internal fragmentation)") \
3152 \
3153 product(uintx, TLABWasteIncrement, 4, \
3154 "Increment allowed waste at slow allocation") \
3155 \
3156 product(uintx, SurvivorRatio, 8, \
3157 "Ratio of eden/survivor space size") \
3158 \
3159 product(uintx, NewRatio, 2, \
3160 "Ratio of old/new generation sizes") \
3161 \
3162 product_pd(uintx, NewSizeThreadIncrease, \
3163 "Additional size added to desired new generation size per " \
3164 "non-daemon thread (in bytes)") \
3165 \
3166 product_pd(uintx, MetaspaceSize, \
3167 "Initial size of Metaspaces (in bytes)") \
3168 \
3169 product(uintx, MaxMetaspaceSize, max_uintx, \
3170 "Maximum size of Metaspaces (in bytes)") \
3171 \
3172 product(uintx, CompressedClassSpaceSize, 1*G, \
3173 "Maximum size of class area in Metaspace when compressed " \
3174 "class pointers are used") \
3175 \
3176 manageable(uintx, MinHeapFreeRatio, 40, \
3177 "The minimum percentage of heap free after GC to avoid expansion."\
3178 " For most GCs this applies to the old generation. In G1 and" \
3179 " ParallelGC it applies to the whole heap.") \
3180 \
3181 manageable(uintx, MaxHeapFreeRatio, 70, \
3182 "The maximum percentage of heap free after GC to avoid shrinking."\
3183 " For most GCs this applies to the old generation. In G1 and" \
3184 " ParallelGC it applies to the whole heap.") \
3185 \
3186 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3187 "Number of milliseconds per MB of free space in the heap") \
3188 \
3189 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3190 "The minimum change in heap space due to GC (in bytes)") \
3191 \
3192 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3193 "The minimum expansion of Metaspace (in bytes)") \
3194 \
3195 product(uintx, MinMetaspaceFreeRatio, 40, \
3196 "The minimum percentage of Metaspace free after GC to avoid " \
3197 "expansion") \
3198 \
3199 product(uintx, MaxMetaspaceFreeRatio, 70, \
3200 "The maximum percentage of Metaspace free after GC to avoid " \
3201 "shrinking") \
3202 \
3203 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3204 "The maximum expansion of Metaspace without full GC (in bytes)") \
3205 \
3206 product(uintx, QueuedAllocationWarningCount, 0, \
3207 "Number of times an allocation that queues behind a GC " \
3208 "will retry before printing a warning") \
3209 \
3210 diagnostic(uintx, VerifyGCStartAt, 0, \
3211 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3212 \
3213 diagnostic(intx, VerifyGCLevel, 0, \
3214 "Generation level at which to start +VerifyBefore/AfterGC") \
3215 \
3216 product(uintx, MaxTenuringThreshold, 15, \
3217 "Maximum value for tenuring threshold") \
3218 \
3219 product(uintx, InitialTenuringThreshold, 7, \
3220 "Initial value for tenuring threshold") \
3221 \
3222 product(uintx, TargetSurvivorRatio, 50, \
3223 "Desired percentage of survivor space used after scavenge") \
3224 \
3225 product(uintx, MarkSweepDeadRatio, 5, \
3226 "Percentage (0-100) of the old gen allowed as dead wood. " \
3227 "Serial mark sweep treats this as both the minimum and maximum " \
3228 "value. " \
3229 "CMS uses this value only if it falls back to mark sweep. " \
3230 "Par compact uses a variable scale based on the density of the " \
3231 "generation and treats this as the maximum value when the heap " \
3232 "is either completely full or completely empty. Par compact " \
3233 "also has a smaller default value; see arguments.cpp.") \
3234 \
3235 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3236 "How often should we fully compact the heap (ignoring the dead " \
3237 "space parameters)") \
3238 \
3239 product(intx, PrintCMSStatistics, 0, \
3240 "Statistics for CMS") \
3241 \
3242 product(bool, PrintCMSInitiationStatistics, false, \
3243 "Statistics for initiating a CMS collection") \
3244 \
3245 product(intx, PrintFLSStatistics, 0, \
3246 "Statistics for CMS' FreeListSpace") \
3247 \
3248 product(intx, PrintFLSCensus, 0, \
3249 "Census for CMS' FreeListSpace") \
3250 \
3251 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3252 "Delay between expansion and allocation (in milliseconds)") \
3253 \
3254 develop(uintx, GCWorkerDelayMillis, 0, \
3255 "Delay in scheduling GC workers (in milliseconds)") \
3256 \
3257 product(intx, DeferThrSuspendLoopCount, 4000, \
3258 "(Unstable) Number of times to iterate in safepoint loop " \
3259 "before blocking VM threads ") \
3260 \
3261 product(intx, DeferPollingPageLoopCount, -1, \
3262 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3263 "before changing safepoint polling page to RO ") \
3264 \
3265 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3266 \
3267 product(bool, PSChunkLargeArrays, true, \
3268 "Process large arrays in chunks") \
3269 \
3270 product(uintx, GCDrainStackTargetSize, 64, \
3271 "Number of entries we will try to leave on the stack " \
3272 "during parallel gc") \
3273 \
3274 /* stack parameters */ \
3275 product_pd(intx, StackYellowPages, \
3276 "Number of yellow zone (recoverable overflows) pages") \
3277 \
3278 product_pd(intx, StackRedPages, \
3279 "Number of red zone (unrecoverable overflows) pages") \
3280 \
3281 product_pd(intx, StackShadowPages, \
3282 "Number of shadow zone (for overflow checking) pages " \
3283 "this should exceed the depth of the VM and native call stack") \
3284 \
3285 product_pd(intx, ThreadStackSize, \
3286 "Thread Stack Size (in Kbytes)") \
3287 \
3288 product_pd(intx, VMThreadStackSize, \
3289 "Non-Java Thread Stack Size (in Kbytes)") \
3290 \
3291 product_pd(intx, CompilerThreadStackSize, \
3292 "Compiler Thread Stack Size (in Kbytes)") \
3293 \
3294 develop_pd(uintx, JVMInvokeMethodSlack, \
3295 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3296 \
3297 product(uintx, ThreadSafetyMargin, 50*M, \
3298 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3299 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3300 "disable this feature") \
3301 \
3302 /* code cache parameters */ \
3303 /* ppc64/tiered compilation has large code-entry alignment. */ \
3304 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\
3305 "Code cache segment size (in bytes) - smallest unit of " \
3306 "allocation") \
3307 \
3308 develop_pd(intx, CodeEntryAlignment, \
3309 "Code entry alignment for generated code (in bytes)") \
3310 \
3311 product_pd(intx, OptoLoopAlignment, \
3312 "Align inner loops to zero relative to this modulus") \
3313 \
3314 product_pd(uintx, InitialCodeCacheSize, \
3315 "Initial code cache size (in bytes)") \
3316 \
3317 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3318 "Minimum code cache size (in bytes) required to start VM.") \
3319 \
3320 product_pd(uintx, ReservedCodeCacheSize, \
3321 "Reserved code cache size (in bytes) - maximum code cache size") \
3322 \
3323 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3324 "When less than X space left, we stop compiling") \
3325 \
3326 product_pd(uintx, CodeCacheExpansionSize, \
3327 "Code cache expansion size (in bytes)") \
3328 \
3329 develop_pd(uintx, CodeCacheMinBlockLength, \
3330 "Minimum number of segments in a code cache block") \
3331 \
3332 notproduct(bool, ExitOnFullCodeCache, false, \
3333 "Exit the VM if we fill the code cache") \
3334 \
3335 product(bool, UseCodeCacheFlushing, true, \
3336 "Remove cold/old nmethods from the code cache") \
3337 \
3338 /* interpreter debugging */ \
3339 develop(intx, BinarySwitchThreshold, 5, \
3340 "Minimal number of lookupswitch entries for rewriting to binary " \
3341 "switch") \
3342 \
3343 develop(intx, StopInterpreterAt, 0, \
3344 "Stop interpreter execution at specified bytecode number") \
3345 \
3346 develop(intx, TraceBytecodesAt, 0, \
3347 "Trace bytecodes starting with specified bytecode number") \
3348 \
3349 /* compiler interface */ \
3350 develop(intx, CIStart, 0, \
3351 "The id of the first compilation to permit") \
3352 \
3353 develop(intx, CIStop, max_jint, \
3354 "The id of the last compilation to permit") \
3355 \
3356 develop(intx, CIStartOSR, 0, \
3357 "The id of the first osr compilation to permit " \
3358 "(CICountOSR must be on)") \
3359 \
3360 develop(intx, CIStopOSR, max_jint, \
3361 "The id of the last osr compilation to permit " \
3362 "(CICountOSR must be on)") \
3363 \
3364 develop(intx, CIBreakAtOSR, -1, \
3365 "The id of osr compilation to break at") \
3366 \
3367 develop(intx, CIBreakAt, -1, \
3368 "The id of compilation to break at") \
3369 \
3370 product(ccstrlist, CompileOnly, "", \
3371 "List of methods (pkg/class.name) to restrict compilation to") \
3372 \
3373 product(ccstr, CompileCommandFile, NULL, \
3374 "Read compiler commands from this file [.hotspot_compiler]") \
3375 \
3376 product(ccstrlist, CompileCommand, "", \
3377 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3378 \
3379 develop(bool, ReplayCompiles, false, \
3380 "Enable replay of compilations from ReplayDataFile") \
3381 \
3382 product(ccstr, ReplayDataFile, NULL, \
3383 "File containing compilation replay information" \
3384 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3385 \
3386 product(ccstr, InlineDataFile, NULL, \
3387 "File containing inlining replay information" \
3388 "[default: ./inline_pid%p.log] (%p replaced with pid)") \
3389 \
3390 develop(intx, ReplaySuppressInitializers, 2, \
3391 "Control handling of class initialization during replay: " \
3392 "0 - don't do anything special; " \
3393 "1 - treat all class initializers as empty; " \
3394 "2 - treat class initializers for application classes as empty; " \
3395 "3 - allow all class initializers to run during bootstrap but " \
3396 " pretend they are empty after starting replay") \
3397 \
3398 develop(bool, ReplayIgnoreInitErrors, false, \
3399 "Ignore exceptions thrown during initialization for replay") \
3400 \
3401 product(bool, DumpReplayDataOnError, true, \
3402 "Record replay data for crashing compiler threads") \
3403 \
3404 product(bool, CICompilerCountPerCPU, false, \
3405 "1 compiler thread for log(N CPUs)") \
3406 \
3407 develop(intx, CIFireOOMAt, -1, \
3408 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3409 "(non-negative value throws OOM after this many CI accesses " \
3410 "in each compile)") \
3411 notproduct(intx, CICrashAt, -1, \
3412 "id of compilation to trigger assert in compiler thread for " \
3413 "the purpose of testing, e.g. generation of replay data") \
3414 notproduct(bool, CIObjectFactoryVerify, false, \
3415 "enable potentially expensive verification in ciObjectFactory") \
3416 \
3417 /* Priorities */ \
3418 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3419 \
3420 product(intx, ThreadPriorityPolicy, 0, \
3421 "0 : Normal. "\
3422 " VM chooses priorities that are appropriate for normal "\
3423 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3424 " to normal native priority. Java priorities below " \
3425 " NORM_PRIORITY map to lower native priority values. On "\
3426 " Windows applications are allowed to use higher native "\
3427 " priorities. However, with ThreadPriorityPolicy=0, VM will "\
3428 " not use the highest possible native priority, "\
3429 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
3430 " system threads. On Linux thread priorities are ignored "\
3431 " because the OS does not support static priority in "\
3432 " SCHED_OTHER scheduling class which is the only choice for "\
3433 " non-root, non-realtime applications. "\
3434 "1 : Aggressive. "\
3435 " Java thread priorities map over to the entire range of "\
3436 " native thread priorities. Higher Java thread priorities map "\
3437 " to higher native thread priorities. This policy should be "\
3438 " used with care, as sometimes it can cause performance "\
3439 " degradation in the application and/or the entire system. On "\
3440 " Linux this policy requires root privilege.") \
3441 \
3442 product(bool, ThreadPriorityVerbose, false, \
3443 "Print priority changes") \
3444 \
3445 product(intx, DefaultThreadPriority, -1, \
3446 "The native priority at which threads run if not elsewhere " \
3447 "specified (-1 means no change)") \
3448 \
3449 product(intx, CompilerThreadPriority, -1, \
3450 "The native priority at which compiler threads should run " \
3451 "(-1 means no change)") \
3452 \
3453 product(intx, VMThreadPriority, -1, \
3454 "The native priority at which the VM thread should run " \
3455 "(-1 means no change)") \
3456 \
3457 product(bool, CompilerThreadHintNoPreempt, true, \
3458 "(Solaris only) Give compiler threads an extra quanta") \
3459 \
3460 product(bool, VMThreadHintNoPreempt, false, \
3461 "(Solaris only) Give VM thread an extra quanta") \
3462 \
3463 product(intx, JavaPriority1_To_OSPriority, -1, \
3464 "Map Java priorities to OS priorities") \
3465 \
3466 product(intx, JavaPriority2_To_OSPriority, -1, \
3467 "Map Java priorities to OS priorities") \
3468 \
3469 product(intx, JavaPriority3_To_OSPriority, -1, \
3470 "Map Java priorities to OS priorities") \
3471 \
3472 product(intx, JavaPriority4_To_OSPriority, -1, \
3473 "Map Java priorities to OS priorities") \
3474 \
3475 product(intx, JavaPriority5_To_OSPriority, -1, \
3476 "Map Java priorities to OS priorities") \
3477 \
3478 product(intx, JavaPriority6_To_OSPriority, -1, \
3479 "Map Java priorities to OS priorities") \
3480 \
3481 product(intx, JavaPriority7_To_OSPriority, -1, \
3482 "Map Java priorities to OS priorities") \
3483 \
3484 product(intx, JavaPriority8_To_OSPriority, -1, \
3485 "Map Java priorities to OS priorities") \
3486 \
3487 product(intx, JavaPriority9_To_OSPriority, -1, \
3488 "Map Java priorities to OS priorities") \
3489 \
3490 product(intx, JavaPriority10_To_OSPriority,-1, \
3491 "Map Java priorities to OS priorities") \
3492 \
3493 experimental(bool, UseCriticalJavaThreadPriority, false, \
3494 "Java thread priority 10 maps to critical scheduling priority") \
3495 \
3496 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3497 "Compiler thread(s) run at critical scheduling priority") \
3498 \
3499 experimental(bool, UseCriticalCMSThreadPriority, false, \
3500 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3501 \
3502 /* compiler debugging */ \
3503 notproduct(intx, CompileTheWorldStartAt, 1, \
3504 "First class to consider when using +CompileTheWorld") \
3505 \
3506 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3507 "Last class to consider when using +CompileTheWorld") \
3508 \
3509 develop(intx, NewCodeParameter, 0, \
3510 "Testing Only: Create a dedicated integer parameter before " \
3511 "putback") \
3512 \
3513 /* new oopmap storage allocation */ \
3514 develop(intx, MinOopMapAllocation, 8, \
3515 "Minimum number of OopMap entries in an OopMapSet") \
3516 \
3517 /* Background Compilation */ \
3518 develop(intx, LongCompileThreshold, 50, \
3519 "Used with +TraceLongCompiles") \
3520 \
3521 product(intx, StarvationMonitorInterval, 200, \
3522 "Pause between each check (in milliseconds)") \
3523 \
3524 /* recompilation */ \
3525 product_pd(intx, CompileThreshold, \
3526 "number of interpreted method invocations before (re-)compiling") \
3527 \
3528 product_pd(intx, BackEdgeThreshold, \
3529 "Interpreter Back edge threshold at which an OSR compilation is " \
3530 "invoked") \
3531 \
3532 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3533 "Interpreter (tier 0) invocation notification frequency") \
3534 \
3535 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3536 "C1 without MDO (tier 2) invocation notification frequency") \
3537 \
3538 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3539 "C1 with MDO profiling (tier 3) invocation notification " \
3540 "frequency") \
3541 \
3542 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3543 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3544 \
3545 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3546 "Interpreter (tier 0) invocation notification frequency") \
3547 \
3548 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3549 "C1 without MDO (tier 2) invocation notification frequency") \
3550 \
3551 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3552 "C1 with MDO profiling (tier 3) invocation notification " \
3553 "frequency") \
3554 \
3555 product(intx, Tier2CompileThreshold, 0, \
3556 "threshold at which tier 2 compilation is invoked") \
3557 \
3558 product(intx, Tier2BackEdgeThreshold, 0, \
3559 "Back edge threshold at which tier 2 compilation is invoked") \
3560 \
3561 product(intx, Tier3InvocationThreshold, 200, \
3562 "Compile if number of method invocations crosses this " \
3563 "threshold") \
3564 \
3565 product(intx, Tier3MinInvocationThreshold, 100, \
3566 "Minimum invocation to compile at tier 3") \
3567 \
3568 product(intx, Tier3CompileThreshold, 2000, \
3569 "Threshold at which tier 3 compilation is invoked (invocation " \
3570 "minimum must be satisfied") \
3571 \
3572 product(intx, Tier3BackEdgeThreshold, 60000, \
3573 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3574 \
3575 product(intx, Tier4InvocationThreshold, 5000, \
3576 "Compile if number of method invocations crosses this " \
3577 "threshold") \
3578 \
3579 product(intx, Tier4MinInvocationThreshold, 600, \
3580 "Minimum invocation to compile at tier 4") \
3581 \
3582 product(intx, Tier4CompileThreshold, 15000, \
3583 "Threshold at which tier 4 compilation is invoked (invocation " \
3584 "minimum must be satisfied") \
3585 \
3586 product(intx, Tier4BackEdgeThreshold, 40000, \
3587 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3588 \
3589 product(intx, Tier3DelayOn, 5, \
3590 "If C2 queue size grows over this amount per compiler thread " \
3591 "stop compiling at tier 3 and start compiling at tier 2") \
3592 \
3593 product(intx, Tier3DelayOff, 2, \
3594 "If C2 queue size is less than this amount per compiler thread " \
3595 "allow methods compiled at tier 2 transition to tier 3") \
3596 \
3597 product(intx, Tier3LoadFeedback, 5, \
3598 "Tier 3 thresholds will increase twofold when C1 queue size " \
3599 "reaches this amount per compiler thread") \
3600 \
3601 product(intx, Tier4LoadFeedback, 3, \
3602 "Tier 4 thresholds will increase twofold when C2 queue size " \
3603 "reaches this amount per compiler thread") \
3604 \
3605 product(intx, TieredCompileTaskTimeout, 50, \
3606 "Kill compile task if method was not used within " \
3607 "given timeout in milliseconds") \
3608 \
3609 product(intx, TieredStopAtLevel, 4, \
3610 "Stop at given compilation level") \
3611 \
3612 product(intx, Tier0ProfilingStartPercentage, 200, \
3613 "Start profiling in interpreter if the counters exceed tier 3 " \
3614 "thresholds by the specified percentage") \
3615 \
3616 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3617 "Increase the compile threshold for C1 compilation if the code " \
3618 "cache is filled by the specified percentage") \
3619 \
3620 product(intx, TieredRateUpdateMinTime, 1, \
3621 "Minimum rate sampling interval (in milliseconds)") \
3622 \
3623 product(intx, TieredRateUpdateMaxTime, 25, \
3624 "Maximum rate sampling interval (in milliseconds)") \
3625 \
3626 product_pd(bool, TieredCompilation, \
3627 "Enable tiered compilation") \
3628 \
3629 product(bool, PrintTieredEvents, false, \
3630 "Print tiered events notifications") \
3631 \
3632 product_pd(intx, OnStackReplacePercentage, \
3633 "NON_TIERED number of method invocations/branches (expressed as " \
3634 "% of CompileThreshold) before (re-)compiling OSR code") \
3635 \
3636 product(intx, InterpreterProfilePercentage, 33, \
3637 "NON_TIERED number of method invocations/branches (expressed as " \
3638 "% of CompileThreshold) before profiling in the interpreter") \
3639 \
3640 develop(intx, MaxRecompilationSearchLength, 10, \
3641 "The maximum number of frames to inspect when searching for " \
3642 "recompilee") \
3643 \
3644 develop(intx, MaxInterpretedSearchLength, 3, \
3645 "The maximum number of interpreted frames to skip when searching "\
3646 "for recompilee") \
3647 \
3648 develop(intx, DesiredMethodLimit, 8000, \
3649 "The desired maximum method size (in bytecodes) after inlining") \
3650 \
3651 develop(intx, HugeMethodLimit, 8000, \
3652 "Don't compile methods larger than this if " \
3653 "+DontCompileHugeMethods") \
3654 \
3655 /* New JDK 1.4 reflection implementation */ \
3656 \
3657 develop(bool, UseNewReflection, true, \
3658 "Temporary flag for transition to reflection based on dynamic " \
3659 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3660 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3661 "changes were needed") \
3662 \
3663 develop(bool, VerifyReflectionBytecodes, false, \
3664 "Force verification of 1.4 reflection bytecodes. Does not work " \
3665 "in situations like that described in 4486457 or for " \
3666 "constructors generated for serialization, so can not be enabled "\
3667 "in product.") \
3668 \
3669 product(bool, ReflectionWrapResolutionErrors, true, \
3670 "Temporary flag for transition to AbstractMethodError wrapped " \
3671 "in InvocationTargetException. See 6531596") \
3672 \
3673 develop(intx, FastSuperclassLimit, 8, \
3674 "Depth of hardwired instanceof accelerator array") \
3675 \
3676 /* Properties for Java libraries */ \
3677 \
3678 product(uintx, MaxDirectMemorySize, 0, \
3679 "Maximum total size of NIO direct-buffer allocations") \
3680 \
3681 /* Flags used for temporary code during development */ \
3682 \
3683 diagnostic(bool, UseNewCode, false, \
3684 "Testing Only: Use the new version while testing") \
3685 \
3686 diagnostic(bool, UseNewCode2, false, \
3687 "Testing Only: Use the new version while testing") \
3688 \
3689 diagnostic(bool, UseNewCode3, false, \
3690 "Testing Only: Use the new version while testing") \
3691 \
3692 /* flags for performance data collection */ \
3693 \
3694 product(bool, UsePerfData, falseInEmbedded, \
3695 "Flag to disable jvmstat instrumentation for performance testing "\
3696 "and problem isolation purposes") \
3697 \
3698 product(bool, PerfDataSaveToFile, false, \
3699 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3700 \
3701 product(ccstr, PerfDataSaveFile, NULL, \
3702 "Save PerfData memory to the specified absolute pathname. " \
3703 "The string %p in the file name (if present) " \
3704 "will be replaced by pid") \
3705 \
3706 product(intx, PerfDataSamplingInterval, 50, \
3707 "Data sampling interval (in milliseconds)") \
3708 \
3709 develop(bool, PerfTraceDataCreation, false, \
3710 "Trace creation of Performance Data Entries") \
3711 \
3712 develop(bool, PerfTraceMemOps, false, \
3713 "Trace PerfMemory create/attach/detach calls") \
3714 \
3715 product(bool, PerfDisableSharedMem, false, \
3716 "Store performance data in standard memory") \
3717 \
3718 product(intx, PerfDataMemorySize, 32*K, \
3719 "Size of performance data memory region. Will be rounded " \
3720 "up to a multiple of the native os page size.") \
3721 \
3722 product(intx, PerfMaxStringConstLength, 1024, \
3723 "Maximum PerfStringConstant string length before truncation") \
3724 \
3725 product(bool, PerfAllowAtExitRegistration, false, \
3726 "Allow registration of atexit() methods") \
3727 \
3728 product(bool, PerfBypassFileSystemCheck, false, \
3729 "Bypass Win32 file system criteria checks (Windows Only)") \
3730 \
3731 product(intx, UnguardOnExecutionViolation, 0, \
3732 "Unguard page and retry on no-execute fault (Win32 only) " \
3733 "0=off, 1=conservative, 2=aggressive") \
3734 \
3735 /* Serviceability Support */ \
3736 \
3737 product(bool, ManagementServer, false, \
3738 "Create JMX Management Server") \
3739 \
3740 product(bool, DisableAttachMechanism, false, \
3741 "Disable mechanism that allows tools to attach to this VM") \
3742 \
3743 product(bool, StartAttachListener, false, \
3744 "Always start Attach Listener at VM startup") \
3745 \
3746 manageable(bool, PrintConcurrentLocks, false, \
3747 "Print java.util.concurrent locks in thread dump") \
3748 \
3749 product(bool, TransmitErrorReport, false, \
3750 "Enable error report transmission on erroneous termination") \
3751 \
3752 product(ccstr, ErrorReportServer, NULL, \
3753 "Override built-in error report server address") \
3754 \
3755 /* Shared spaces */ \
3756 \
3757 product(bool, UseSharedSpaces, true, \
3758 "Use shared spaces for metadata") \
3759 \
3760 product(bool, RequireSharedSpaces, false, \
3761 "Require shared spaces for metadata") \
3762 \
3763 product(bool, DumpSharedSpaces, false, \
3764 "Special mode: JVM reads a class list, loads classes, builds " \
3765 "shared spaces, and dumps the shared spaces to a file to be " \
3766 "used in future JVM runs") \
3767 \
3768 product(bool, PrintSharedSpaces, false, \
3769 "Print usage of shared spaces") \
3770 \
3771 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3772 "Size of read-write space for metadata (in bytes)") \
3773 \
3774 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3775 "Size of read-only space for metadata (in bytes)") \
3776 \
3777 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \
3778 "Size of the shared miscellaneous data area (in bytes)") \
3779 \
3780 product(uintx, SharedMiscCodeSize, 120*K, \
3781 "Size of the shared miscellaneous code area (in bytes)") \
3782 \
3783 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \
3784 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
3785 "Address to allocate shared memory region for class data") \
3786 \
3787 diagnostic(bool, EnableInvokeDynamic, true, \
3788 "support JSR 292 (method handles, invokedynamic, " \
3789 "anonymous classes") \
3790 \
3791 diagnostic(bool, PrintMethodHandleStubs, false, \
3792 "Print generated stub code for method handles") \
3793 \
3794 develop(bool, TraceMethodHandles, false, \
3795 "trace internal method handle operations") \
3796 \
3797 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3798 "perform extra checks when constructing method handles") \
3799 \
3800 diagnostic(bool, ShowHiddenFrames, false, \
3801 "show method handle implementation frames (usually hidden)") \
3802 \
3803 experimental(bool, TrustFinalNonStaticFields, false, \
3804 "trust final non-static declarations for constant folding") \
3805 \
3806 diagnostic(bool, FoldStableValues, true, \
3807 "Optimize loads from stable fields (marked w/ @Stable)") \
3808 \
3809 develop(bool, TraceInvokeDynamic, false, \
3810 "trace internal invoke dynamic operations") \
3811 \
3812 diagnostic(bool, PauseAtStartup, false, \
3813 "Causes the VM to pause at startup time and wait for the pause " \
3814 "file to be removed (default: ./vm.paused.<pid>)") \
3815 \
3816 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3817 "The file to create and for whose removal to await when pausing " \
3818 "at startup. (default: ./vm.paused.<pid>)") \
3819 \
3820 diagnostic(bool, PauseAtExit, false, \
3821 "Pause and wait for keypress on exit if a debugger is attached") \
3822 \
3823 product(bool, ExtendedDTraceProbes, false, \
3824 "Enable performance-impacting dtrace probes") \
3825 \
3826 product(bool, DTraceMethodProbes, false, \
3827 "Enable dtrace probes for method-entry and method-exit") \
3828 \
3829 product(bool, DTraceAllocProbes, false, \
3830 "Enable dtrace probes for object allocation") \
3831 \
3832 product(bool, DTraceMonitorProbes, false, \
3833 "Enable dtrace probes for monitor events") \
3834 \
3835 product(bool, RelaxAccessControlCheck, false, \
3836 "Relax the access control checks in the verifier") \
3837 \
3838 diagnostic(bool, PrintDTraceDOF, false, \
3839 "Print the DTrace DOF passed to the system for JSDT probes") \
3840 \
3841 product(uintx, StringTableSize, defaultStringTableSize, \
3842 "Number of buckets in the interned String table") \
3843 \
3844 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
3845 "Number of buckets in the JVM internal Symbol table") \
3846 \
3847 product(bool, UseStringDeduplication, false, \
3848 "Use string deduplication") \
3849 \
3850 product(bool, PrintStringDeduplicationStatistics, false, \
3851 "Print string deduplication statistics") \
3852 \
3853 product(uintx, StringDeduplicationAgeThreshold, 3, \
3854 "A string must reach this age (or be promoted to an old region) " \
3855 "to be considered for deduplication") \
3856 \
3857 diagnostic(bool, StringDeduplicationResizeALot, false, \
3858 "Force table resize every time the table is scanned") \
3859 \
3860 diagnostic(bool, StringDeduplicationRehashALot, false, \
3861 "Force table rehash every time the table is scanned") \
3862 \
3863 develop(bool, TraceDefaultMethods, false, \
3864 "Trace the default method processing steps") \
3865 \
3866 develop(bool, VerifyGenericSignatures, false, \
3867 "Abort VM on erroneous or inconsistent generic signatures") \
3868 \
3869 diagnostic(bool, WhiteBoxAPI, false, \
3870 "Enable internal testing APIs") \
3871 \
3872 product(bool, PrintGCCause, true, \
3873 "Include GC cause in GC logging") \
3874 \
3875 product(bool , AllowNonVirtualCalls, false, \
3876 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3877 \
3878 diagnostic(ccstr, SharedArchiveFile, NULL, \
3879 "Override the default location of the CDS archive file") \
3880 \
3881 experimental(uintx, ArrayAllocatorMallocLimit, \
3882 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
3883 "Allocation less than this value will be allocated " \
3884 "using malloc. Larger allocations will use mmap.") \
3885 \
3886 experimental(bool, AlwaysAtomicAccesses, false, \
3887 "Accesses to all variables should always be atomic") \
3888 \
3889 product(bool, EnableTracing, false, \
3890 "Enable event-based tracing") \
3891 \
3892 product(bool, UseLockedTracing, false, \
3893 "Use locked-tracing when doing event-based tracing")
3894
3895 /*
3896 * Macros for factoring of globals
3897 */
3898
3899 // Interface macros
3900 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3901 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3902 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3903 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3904 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3905 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3906 #ifdef PRODUCT
3907 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value;
3908 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name;
3909 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name;
3910 #else
3911 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3912 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3913 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3914 #endif
3915 // Special LP64 flags, product only needed for now.
3916 #ifdef _LP64
3917 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3918 #else
3919 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3920 #endif // _LP64
3921
3922 // Implementation macros
3923 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3924 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3925 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3926 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3927 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3928 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3929 #ifdef PRODUCT
3930 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value;
3931 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name;
3932 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value;
3933 #else
3934 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3935 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3936 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3937 #endif
3938 #ifdef _LP64
3939 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3940 #else
3941 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3942 #endif // _LP64
3943
3944 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)
3945
3946 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3947
3948 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3949
3950 // Extensions
3951
3952 #include "runtime/globals_ext.hpp"
3953
3954 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP