Thu, 26 Sep 2013 12:07:53 -0700
8024545: make develop and notproduct flag values available in product builds
Reviewed-by: dholmes, kvn
1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
26 #define SHARE_VM_RUNTIME_GLOBALS_HPP
28 #include "utilities/debug.hpp"
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
40 #ifdef TARGET_ARCH_x86
41 # include "globals_x86.hpp"
42 #endif
43 #ifdef TARGET_ARCH_sparc
44 # include "globals_sparc.hpp"
45 #endif
46 #ifdef TARGET_ARCH_zero
47 # include "globals_zero.hpp"
48 #endif
49 #ifdef TARGET_ARCH_arm
50 # include "globals_arm.hpp"
51 #endif
52 #ifdef TARGET_ARCH_ppc
53 # include "globals_ppc.hpp"
54 #endif
55 #ifdef TARGET_OS_FAMILY_linux
56 # include "globals_linux.hpp"
57 #endif
58 #ifdef TARGET_OS_FAMILY_solaris
59 # include "globals_solaris.hpp"
60 #endif
61 #ifdef TARGET_OS_FAMILY_windows
62 # include "globals_windows.hpp"
63 #endif
64 #ifdef TARGET_OS_FAMILY_bsd
65 # include "globals_bsd.hpp"
66 #endif
67 #ifdef TARGET_OS_ARCH_linux_x86
68 # include "globals_linux_x86.hpp"
69 #endif
70 #ifdef TARGET_OS_ARCH_linux_sparc
71 # include "globals_linux_sparc.hpp"
72 #endif
73 #ifdef TARGET_OS_ARCH_linux_zero
74 # include "globals_linux_zero.hpp"
75 #endif
76 #ifdef TARGET_OS_ARCH_solaris_x86
77 # include "globals_solaris_x86.hpp"
78 #endif
79 #ifdef TARGET_OS_ARCH_solaris_sparc
80 # include "globals_solaris_sparc.hpp"
81 #endif
82 #ifdef TARGET_OS_ARCH_windows_x86
83 # include "globals_windows_x86.hpp"
84 #endif
85 #ifdef TARGET_OS_ARCH_linux_arm
86 # include "globals_linux_arm.hpp"
87 #endif
88 #ifdef TARGET_OS_ARCH_linux_ppc
89 # include "globals_linux_ppc.hpp"
90 #endif
91 #ifdef TARGET_OS_ARCH_bsd_x86
92 # include "globals_bsd_x86.hpp"
93 #endif
94 #ifdef TARGET_OS_ARCH_bsd_zero
95 # include "globals_bsd_zero.hpp"
96 #endif
97 #ifdef COMPILER1
98 #ifdef TARGET_ARCH_x86
99 # include "c1_globals_x86.hpp"
100 #endif
101 #ifdef TARGET_ARCH_sparc
102 # include "c1_globals_sparc.hpp"
103 #endif
104 #ifdef TARGET_ARCH_arm
105 # include "c1_globals_arm.hpp"
106 #endif
107 #ifdef TARGET_ARCH_ppc
108 # include "c1_globals_ppc.hpp"
109 #endif
110 #ifdef TARGET_OS_FAMILY_linux
111 # include "c1_globals_linux.hpp"
112 #endif
113 #ifdef TARGET_OS_FAMILY_solaris
114 # include "c1_globals_solaris.hpp"
115 #endif
116 #ifdef TARGET_OS_FAMILY_windows
117 # include "c1_globals_windows.hpp"
118 #endif
119 #ifdef TARGET_OS_FAMILY_bsd
120 # include "c1_globals_bsd.hpp"
121 #endif
122 #endif
123 #ifdef COMPILER2
124 #ifdef TARGET_ARCH_x86
125 # include "c2_globals_x86.hpp"
126 #endif
127 #ifdef TARGET_ARCH_sparc
128 # include "c2_globals_sparc.hpp"
129 #endif
130 #ifdef TARGET_ARCH_arm
131 # include "c2_globals_arm.hpp"
132 #endif
133 #ifdef TARGET_OS_FAMILY_linux
134 # include "c2_globals_linux.hpp"
135 #endif
136 #ifdef TARGET_OS_FAMILY_solaris
137 # include "c2_globals_solaris.hpp"
138 #endif
139 #ifdef TARGET_OS_FAMILY_windows
140 # include "c2_globals_windows.hpp"
141 #endif
142 #ifdef TARGET_OS_FAMILY_bsd
143 # include "c2_globals_bsd.hpp"
144 #endif
145 #endif
146 #ifdef SHARK
147 #ifdef TARGET_ARCH_zero
148 # include "shark_globals_zero.hpp"
149 #endif
150 #endif
152 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
153 define_pd_global(bool, BackgroundCompilation, false);
154 define_pd_global(bool, UseTLAB, false);
155 define_pd_global(bool, CICompileOSR, false);
156 define_pd_global(bool, UseTypeProfile, false);
157 define_pd_global(bool, UseOnStackReplacement, false);
158 define_pd_global(bool, InlineIntrinsics, false);
159 define_pd_global(bool, PreferInterpreterNativeStubs, true);
160 define_pd_global(bool, ProfileInterpreter, false);
161 define_pd_global(bool, ProfileTraps, false);
162 define_pd_global(bool, TieredCompilation, false);
164 define_pd_global(intx, CompileThreshold, 0);
165 define_pd_global(intx, BackEdgeThreshold, 0);
167 define_pd_global(intx, OnStackReplacePercentage, 0);
168 define_pd_global(bool, ResizeTLAB, false);
169 define_pd_global(intx, FreqInlineSize, 0);
170 define_pd_global(intx, InlineSmallCode, 0);
171 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
172 define_pd_global(intx, InlineClassNatives, true);
173 define_pd_global(intx, InlineUnsafeOps, true);
174 define_pd_global(intx, InitialCodeCacheSize, 160*K);
175 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
176 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
177 define_pd_global(intx, CodeCacheMinBlockLength, 1);
178 define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K);
179 define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M));
180 define_pd_global(bool, NeverActAsServerClassMachine, true);
181 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
182 #define CI_COMPILER_COUNT 0
183 #else
185 #ifdef COMPILER2
186 #define CI_COMPILER_COUNT 2
187 #else
188 #define CI_COMPILER_COUNT 1
189 #endif // COMPILER2
191 #endif // no compilers
193 // string type aliases used only in this file
194 typedef const char* ccstr;
195 typedef const char* ccstrlist; // represents string arguments which accumulate
197 struct Flag {
198 enum Flags {
199 // value origin
200 DEFAULT = 0,
201 COMMAND_LINE = 1,
202 ENVIRON_VAR = 2,
203 CONFIG_FILE = 3,
204 MANAGEMENT = 4,
205 ERGONOMIC = 5,
206 ATTACH_ON_DEMAND = 6,
207 INTERNAL = 7,
209 LAST_VALUE_ORIGIN = INTERNAL,
210 VALUE_ORIGIN_BITS = 4,
211 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
213 // flag kind
214 KIND_PRODUCT = 1 << 4,
215 KIND_MANAGEABLE = 1 << 5,
216 KIND_DIAGNOSTIC = 1 << 6,
217 KIND_EXPERIMENTAL = 1 << 7,
218 KIND_NOT_PRODUCT = 1 << 8,
219 KIND_DEVELOP = 1 << 9,
220 KIND_PLATFORM_DEPENDENT = 1 << 10,
221 KIND_READ_WRITE = 1 << 11,
222 KIND_C1 = 1 << 12,
223 KIND_C2 = 1 << 13,
224 KIND_ARCH = 1 << 14,
225 KIND_SHARK = 1 << 15,
226 KIND_LP64_PRODUCT = 1 << 16,
227 KIND_COMMERCIAL = 1 << 17,
229 KIND_MASK = ~VALUE_ORIGIN_MASK
230 };
232 const char* _type;
233 const char* _name;
234 void* _addr;
235 NOT_PRODUCT(const char* _doc;)
236 Flags _flags;
238 // points to all Flags static array
239 static Flag* flags;
241 // number of flags
242 static size_t numFlags;
244 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false);
245 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
247 void check_writable();
249 bool is_bool() const;
250 bool get_bool() const;
251 void set_bool(bool value);
253 bool is_intx() const;
254 intx get_intx() const;
255 void set_intx(intx value);
257 bool is_uintx() const;
258 uintx get_uintx() const;
259 void set_uintx(uintx value);
261 bool is_uint64_t() const;
262 uint64_t get_uint64_t() const;
263 void set_uint64_t(uint64_t value);
265 bool is_double() const;
266 double get_double() const;
267 void set_double(double value);
269 bool is_ccstr() const;
270 bool ccstr_accumulates() const;
271 ccstr get_ccstr() const;
272 void set_ccstr(ccstr value);
274 Flags get_origin();
275 void set_origin(Flags origin);
277 bool is_default();
278 bool is_ergonomic();
279 bool is_command_line();
281 bool is_product() const;
282 bool is_manageable() const;
283 bool is_diagnostic() const;
284 bool is_experimental() const;
285 bool is_notproduct() const;
286 bool is_develop() const;
287 bool is_read_write() const;
288 bool is_commercial() const;
290 bool is_constant_in_binary() const;
292 bool is_unlocker() const;
293 bool is_unlocked() const;
294 bool is_writeable() const;
295 bool is_external() const;
297 bool is_unlocker_ext() const;
298 bool is_unlocked_ext() const;
299 bool is_writeable_ext() const;
300 bool is_external_ext() const;
302 void get_locked_message(char*, int) const;
303 void get_locked_message_ext(char*, int) const;
305 void print_on(outputStream* st, bool withComments = false );
306 void print_kind(outputStream* st);
307 void print_as_flag(outputStream* st);
308 };
310 // debug flags control various aspects of the VM and are global accessible
312 // use FlagSetting to temporarily change some debug flag
313 // e.g. FlagSetting fs(DebugThisAndThat, true);
314 // restored to previous value upon leaving scope
315 class FlagSetting {
316 bool val;
317 bool* flag;
318 public:
319 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
320 ~FlagSetting() { *flag = val; }
321 };
324 class CounterSetting {
325 intx* counter;
326 public:
327 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
328 ~CounterSetting() { (*counter)--; }
329 };
332 class UIntFlagSetting {
333 uintx val;
334 uintx* flag;
335 public:
336 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
337 ~UIntFlagSetting() { *flag = val; }
338 };
341 class DoubleFlagSetting {
342 double val;
343 double* flag;
344 public:
345 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
346 ~DoubleFlagSetting() { *flag = val; }
347 };
350 class CommandLineFlags {
351 public:
352 static bool boolAt(char* name, size_t len, bool* value);
353 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
354 static bool boolAtPut(char* name, size_t len, bool* value, Flag::Flags origin);
355 static bool boolAtPut(char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
357 static bool intxAt(char* name, size_t len, intx* value);
358 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
359 static bool intxAtPut(char* name, size_t len, intx* value, Flag::Flags origin);
360 static bool intxAtPut(char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
362 static bool uintxAt(char* name, size_t len, uintx* value);
363 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
364 static bool uintxAtPut(char* name, size_t len, uintx* value, Flag::Flags origin);
365 static bool uintxAtPut(char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
367 static bool uint64_tAt(char* name, size_t len, uint64_t* value);
368 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
369 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, Flag::Flags origin);
370 static bool uint64_tAtPut(char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
372 static bool doubleAt(char* name, size_t len, double* value);
373 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
374 static bool doubleAtPut(char* name, size_t len, double* value, Flag::Flags origin);
375 static bool doubleAtPut(char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
377 static bool ccstrAt(char* name, size_t len, ccstr* value);
378 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
379 static bool ccstrAtPut(char* name, size_t len, ccstr* value, Flag::Flags origin);
380 static bool ccstrAtPut(char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
382 // Returns false if name is not a command line flag.
383 static bool wasSetOnCmdline(const char* name, bool* value);
384 static void printSetFlags(outputStream* out);
386 static void printFlags(outputStream* out, bool withComments);
388 static void verify() PRODUCT_RETURN;
389 };
391 // use this for flags that are true by default in the debug version but
392 // false in the optimized version, and vice versa
393 #ifdef ASSERT
394 #define trueInDebug true
395 #define falseInDebug false
396 #else
397 #define trueInDebug false
398 #define falseInDebug true
399 #endif
401 // use this for flags that are true per default in the product build
402 // but false in development builds, and vice versa
403 #ifdef PRODUCT
404 #define trueInProduct true
405 #define falseInProduct false
406 #else
407 #define trueInProduct false
408 #define falseInProduct true
409 #endif
411 #ifdef JAVASE_EMBEDDED
412 #define falseInEmbedded false
413 #else
414 #define falseInEmbedded true
415 #endif
417 // develop flags are settable / visible only during development and are constant in the PRODUCT version
418 // product flags are always settable / visible
419 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
421 // A flag must be declared with one of the following types:
422 // bool, intx, uintx, ccstr.
423 // The type "ccstr" is an alias for "const char*" and is used
424 // only in this file, because the macrology requires single-token type names.
426 // Note: Diagnostic options not meant for VM tuning or for product modes.
427 // They are to be used for VM quality assurance or field diagnosis
428 // of VM bugs. They are hidden so that users will not be encouraged to
429 // try them as if they were VM ordinary execution options. However, they
430 // are available in the product version of the VM. Under instruction
431 // from support engineers, VM customers can turn them on to collect
432 // diagnostic information about VM problems. To use a VM diagnostic
433 // option, you must first specify +UnlockDiagnosticVMOptions.
434 // (This master switch also affects the behavior of -Xprintflags.)
435 //
436 // experimental flags are in support of features that are not
437 // part of the officially supported product, but are available
438 // for experimenting with. They could, for example, be performance
439 // features that may not have undergone full or rigorous QA, but which may
440 // help performance in some cases and released for experimentation
441 // by the community of users and developers. This flag also allows one to
442 // be able to build a fully supported product that nonetheless also
443 // ships with some unsupported, lightly tested, experimental features.
444 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
445 // UnlockExperimentalVMOptions flag, which allows the control and
446 // modification of the experimental flags.
447 //
448 // Nota bene: neither diagnostic nor experimental options should be used casually,
449 // and they are not supported on production loads, except under explicit
450 // direction from support engineers.
451 //
452 // manageable flags are writeable external product flags.
453 // They are dynamically writeable through the JDK management interface
454 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
455 // These flags are external exported interface (see CCC). The list of
456 // manageable flags can be queried programmatically through the management
457 // interface.
458 //
459 // A flag can be made as "manageable" only if
460 // - the flag is defined in a CCC as an external exported interface.
461 // - the VM implementation supports dynamic setting of the flag.
462 // This implies that the VM must *always* query the flag variable
463 // and not reuse state related to the flag state at any given time.
464 // - you want the flag to be queried programmatically by the customers.
465 //
466 // product_rw flags are writeable internal product flags.
467 // They are like "manageable" flags but for internal/private use.
468 // The list of product_rw flags are internal/private flags which
469 // may be changed/removed in a future release. It can be set
470 // through the management interface to get/set value
471 // when the name of flag is supplied.
472 //
473 // A flag can be made as "product_rw" only if
474 // - the VM implementation supports dynamic setting of the flag.
475 // This implies that the VM must *always* query the flag variable
476 // and not reuse state related to the flag state at any given time.
477 //
478 // Note that when there is a need to support develop flags to be writeable,
479 // it can be done in the same way as product_rw.
481 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
482 \
483 lp64_product(bool, UseCompressedOops, false, \
484 "Use 32-bit object references in 64-bit VM " \
485 "lp64_product means flag is always constant in 32 bit VM") \
486 \
487 lp64_product(bool, UseCompressedClassPointers, false, \
488 "Use 32-bit class pointers in 64-bit VM " \
489 "lp64_product means flag is always constant in 32 bit VM") \
490 \
491 notproduct(bool, CheckCompressedOops, true, \
492 "generate checks in encoding/decoding code in debug VM") \
493 \
494 product_pd(uintx, HeapBaseMinAddress, \
495 "OS specific low limit for heap base address") \
496 \
497 diagnostic(bool, PrintCompressedOopsMode, false, \
498 "Print compressed oops base address and encoding mode") \
499 \
500 lp64_product(intx, ObjectAlignmentInBytes, 8, \
501 "Default object alignment in bytes, 8 is minimum") \
502 \
503 product(bool, AssumeMP, false, \
504 "Instruct the VM to assume multiple processors are available") \
505 \
506 /* UseMembar is theoretically a temp flag used for memory barrier \
507 * removal testing. It was supposed to be removed before FCS but has \
508 * been re-added (see 6401008) */ \
509 product_pd(bool, UseMembar, \
510 "(Unstable) Issues membars on thread state transitions") \
511 \
512 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \
513 * that don't support it. This will be replaced by processor detection \
514 * logic. \
515 */ \
516 product(bool, UsePPCLWSYNC, true, \
517 "Use lwsync instruction if true, else use slower sync") \
518 \
519 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
520 "Whether to clean the chunk pool asynchronously") \
521 \
522 /* Temporary: See 6948537 */ \
523 experimental(bool, UseMemSetInBOT, true, \
524 "(Unstable) uses memset in BOT updates in GC code") \
525 \
526 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
527 "Enable normal processing of flags relating to field diagnostics")\
528 \
529 experimental(bool, UnlockExperimentalVMOptions, false, \
530 "Enable normal processing of flags relating to experimental features")\
531 \
532 product(bool, JavaMonitorsInStackTrace, true, \
533 "Print info. about Java monitor locks when the stacks are dumped")\
534 \
535 product_pd(bool, UseLargePages, \
536 "Use large page memory") \
537 \
538 product_pd(bool, UseLargePagesIndividualAllocation, \
539 "Allocate large pages individually for better affinity") \
540 \
541 develop(bool, LargePagesIndividualAllocationInjectError, false, \
542 "Fail large pages individual allocation") \
543 \
544 develop(bool, TracePageSizes, false, \
545 "Trace page size selection and usage.") \
546 \
547 product(bool, UseNUMA, false, \
548 "Use NUMA if available") \
549 \
550 product(bool, UseNUMAInterleaving, false, \
551 "Interleave memory across NUMA nodes if available") \
552 \
553 product(uintx, NUMAInterleaveGranularity, 2*M, \
554 "Granularity to use for NUMA interleaving on Windows OS") \
555 \
556 product(bool, ForceNUMA, false, \
557 "Force NUMA optimizations on single-node/UMA systems") \
558 \
559 product(uintx, NUMAChunkResizeWeight, 20, \
560 "Percentage (0-100) used to weigh the current sample when " \
561 "computing exponentially decaying average for " \
562 "AdaptiveNUMAChunkSizing") \
563 \
564 product(uintx, NUMASpaceResizeRate, 1*G, \
565 "Do not reallocate more that this amount per collection") \
566 \
567 product(bool, UseAdaptiveNUMAChunkSizing, true, \
568 "Enable adaptive chunk sizing for NUMA") \
569 \
570 product(bool, NUMAStats, false, \
571 "Print NUMA stats in detailed heap information") \
572 \
573 product(uintx, NUMAPageScanRate, 256, \
574 "Maximum number of pages to include in the page scan procedure") \
575 \
576 product_pd(bool, NeedsDeoptSuspend, \
577 "True for register window machines (sparc/ia64)") \
578 \
579 product(intx, UseSSE, 99, \
580 "Highest supported SSE instructions set on x86/x64") \
581 \
582 product(bool, UseAES, false, \
583 "Control whether AES instructions can be used on x86/x64") \
584 \
585 product(uintx, LargePageSizeInBytes, 0, \
586 "Large page size (0 to let VM choose the page size") \
587 \
588 product(uintx, LargePageHeapSizeThreshold, 128*M, \
589 "Use large pages if max heap is at least this big") \
590 \
591 product(bool, ForceTimeHighResolution, false, \
592 "Using high time resolution(For Win32 only)") \
593 \
594 develop(bool, TraceItables, false, \
595 "Trace initialization and use of itables") \
596 \
597 develop(bool, TracePcPatching, false, \
598 "Trace usage of frame::patch_pc") \
599 \
600 develop(bool, TraceJumps, false, \
601 "Trace assembly jumps in thread ring buffer") \
602 \
603 develop(bool, TraceRelocator, false, \
604 "Trace the bytecode relocator") \
605 \
606 develop(bool, TraceLongCompiles, false, \
607 "Print out every time compilation is longer than " \
608 "a given threashold") \
609 \
610 develop(bool, SafepointALot, false, \
611 "Generates a lot of safepoints. Works with " \
612 "GuaranteedSafepointInterval") \
613 \
614 product_pd(bool, BackgroundCompilation, \
615 "A thread requesting compilation is not blocked during " \
616 "compilation") \
617 \
618 product(bool, PrintVMQWaitTime, false, \
619 "Prints out the waiting time in VM operation queue") \
620 \
621 develop(bool, NoYieldsInMicrolock, false, \
622 "Disable yields in microlock") \
623 \
624 develop(bool, TraceOopMapGeneration, false, \
625 "Shows oopmap generation") \
626 \
627 product(bool, MethodFlushing, true, \
628 "Reclamation of zombie and not-entrant methods") \
629 \
630 develop(bool, VerifyStack, false, \
631 "Verify stack of each thread when it is entering a runtime call") \
632 \
633 diagnostic(bool, ForceUnreachable, false, \
634 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \
635 \
636 notproduct(bool, StressDerivedPointers, false, \
637 "Force scavenge when a derived pointers is detected on stack " \
638 "after rtm call") \
639 \
640 develop(bool, TraceDerivedPointers, false, \
641 "Trace traversal of derived pointers on stack") \
642 \
643 notproduct(bool, TraceCodeBlobStacks, false, \
644 "Trace stack-walk of codeblobs") \
645 \
646 product(bool, PrintJNIResolving, false, \
647 "Used to implement -v:jni") \
648 \
649 notproduct(bool, PrintRewrites, false, \
650 "Print methods that are being rewritten") \
651 \
652 product(bool, UseInlineCaches, true, \
653 "Use Inline Caches for virtual calls ") \
654 \
655 develop(bool, InlineArrayCopy, true, \
656 "inline arraycopy native that is known to be part of " \
657 "base library DLL") \
658 \
659 develop(bool, InlineObjectHash, true, \
660 "inline Object::hashCode() native that is known to be part " \
661 "of base library DLL") \
662 \
663 develop(bool, InlineNatives, true, \
664 "inline natives that are known to be part of base library DLL") \
665 \
666 develop(bool, InlineMathNatives, true, \
667 "inline SinD, CosD, etc.") \
668 \
669 develop(bool, InlineClassNatives, true, \
670 "inline Class.isInstance, etc") \
671 \
672 develop(bool, InlineThreadNatives, true, \
673 "inline Thread.currentThread, etc") \
674 \
675 develop(bool, InlineUnsafeOps, true, \
676 "inline memory ops (native methods) from sun.misc.Unsafe") \
677 \
678 product(bool, CriticalJNINatives, true, \
679 "check for critical JNI entry points") \
680 \
681 notproduct(bool, StressCriticalJNINatives, false, \
682 "Exercise register saving code in critical natives") \
683 \
684 product(bool, UseSSE42Intrinsics, false, \
685 "SSE4.2 versions of intrinsics") \
686 \
687 product(bool, UseAESIntrinsics, false, \
688 "use intrinsics for AES versions of crypto") \
689 \
690 product(bool, UseCRC32Intrinsics, false, \
691 "use intrinsics for java.util.zip.CRC32") \
692 \
693 develop(bool, TraceCallFixup, false, \
694 "traces all call fixups") \
695 \
696 develop(bool, DeoptimizeALot, false, \
697 "deoptimize at every exit from the runtime system") \
698 \
699 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
700 "a comma separated list of bcis to deoptimize at") \
701 \
702 product(bool, DeoptimizeRandom, false, \
703 "deoptimize random frames on random exit from the runtime system")\
704 \
705 notproduct(bool, ZombieALot, false, \
706 "creates zombies (non-entrant) at exit from the runt. system") \
707 \
708 product(bool, UnlinkSymbolsALot, false, \
709 "unlink unreferenced symbols from the symbol table at safepoints")\
710 \
711 notproduct(bool, WalkStackALot, false, \
712 "trace stack (no print) at every exit from the runtime system") \
713 \
714 product(bool, Debugging, false, \
715 "set when executing debug methods in debug.ccp " \
716 "(to prevent triggering assertions)") \
717 \
718 notproduct(bool, StrictSafepointChecks, trueInDebug, \
719 "Enable strict checks that safepoints cannot happen for threads " \
720 "that used No_Safepoint_Verifier") \
721 \
722 notproduct(bool, VerifyLastFrame, false, \
723 "Verify oops on last frame on entry to VM") \
724 \
725 develop(bool, TraceHandleAllocation, false, \
726 "Prints out warnings when suspicious many handles are allocated") \
727 \
728 product(bool, UseCompilerSafepoints, true, \
729 "Stop at safepoints in compiled code") \
730 \
731 product(bool, FailOverToOldVerifier, true, \
732 "fail over to old verifier when split verifier fails") \
733 \
734 develop(bool, ShowSafepointMsgs, false, \
735 "Show msg. about safepoint synch.") \
736 \
737 product(bool, SafepointTimeout, false, \
738 "Time out and warn or fail after SafepointTimeoutDelay " \
739 "milliseconds if failed to reach safepoint") \
740 \
741 develop(bool, DieOnSafepointTimeout, false, \
742 "Die upon failure to reach safepoint (see SafepointTimeout)") \
743 \
744 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
745 /* typically, at most a few retries are needed */ \
746 product(intx, SuspendRetryCount, 50, \
747 "Maximum retry count for an external suspend request") \
748 \
749 product(intx, SuspendRetryDelay, 5, \
750 "Milliseconds to delay per retry (* current_retry_count)") \
751 \
752 product(bool, AssertOnSuspendWaitFailure, false, \
753 "Assert/Guarantee on external suspend wait failure") \
754 \
755 product(bool, TraceSuspendWaitFailures, false, \
756 "Trace external suspend wait failures") \
757 \
758 product(bool, MaxFDLimit, true, \
759 "Bump the number of file descriptors to max in solaris.") \
760 \
761 diagnostic(bool, LogEvents, true, \
762 "Enable the various ring buffer event logs") \
763 \
764 diagnostic(uintx, LogEventsBufferEntries, 10, \
765 "Enable the various ring buffer event logs") \
766 \
767 product(bool, BytecodeVerificationRemote, true, \
768 "Enables the Java bytecode verifier for remote classes") \
769 \
770 product(bool, BytecodeVerificationLocal, false, \
771 "Enables the Java bytecode verifier for local classes") \
772 \
773 develop(bool, ForceFloatExceptions, trueInDebug, \
774 "Force exceptions on FP stack under/overflow") \
775 \
776 develop(bool, VerifyStackAtCalls, false, \
777 "Verify that the stack pointer is unchanged after calls") \
778 \
779 develop(bool, TraceJavaAssertions, false, \
780 "Trace java language assertions") \
781 \
782 notproduct(bool, CheckAssertionStatusDirectives, false, \
783 "temporary - see javaClasses.cpp") \
784 \
785 notproduct(bool, PrintMallocFree, false, \
786 "Trace calls to C heap malloc/free allocation") \
787 \
788 product(bool, PrintOopAddress, false, \
789 "Always print the location of the oop") \
790 \
791 notproduct(bool, VerifyCodeCacheOften, false, \
792 "Verify compiled-code cache often") \
793 \
794 develop(bool, ZapDeadCompiledLocals, false, \
795 "Zap dead locals in compiler frames") \
796 \
797 notproduct(bool, ZapDeadLocalsOld, false, \
798 "Zap dead locals (old version, zaps all frames when " \
799 "entering the VM") \
800 \
801 notproduct(bool, CheckOopishValues, false, \
802 "Warn if value contains oop ( requires ZapDeadLocals)") \
803 \
804 develop(bool, UseMallocOnly, false, \
805 "use only malloc/free for allocation (no resource area/arena)") \
806 \
807 develop(bool, PrintMalloc, false, \
808 "print all malloc/free calls") \
809 \
810 develop(bool, PrintMallocStatistics, false, \
811 "print malloc/free statistics") \
812 \
813 develop(bool, ZapResourceArea, trueInDebug, \
814 "Zap freed resource/arena space with 0xABABABAB") \
815 \
816 notproduct(bool, ZapVMHandleArea, trueInDebug, \
817 "Zap freed VM handle space with 0xBCBCBCBC") \
818 \
819 develop(bool, ZapJNIHandleArea, trueInDebug, \
820 "Zap freed JNI handle space with 0xFEFEFEFE") \
821 \
822 notproduct(bool, ZapStackSegments, trueInDebug, \
823 "Zap allocated/freed Stack segments with 0xFADFADED") \
824 \
825 develop(bool, ZapUnusedHeapArea, trueInDebug, \
826 "Zap unused heap space with 0xBAADBABE") \
827 \
828 develop(bool, TraceZapUnusedHeapArea, false, \
829 "Trace zapping of unused heap space") \
830 \
831 develop(bool, CheckZapUnusedHeapArea, false, \
832 "Check zapping of unused heap space") \
833 \
834 develop(bool, ZapFillerObjects, trueInDebug, \
835 "Zap filler objects with 0xDEAFBABE") \
836 \
837 develop(bool, PrintVMMessages, true, \
838 "Print vm messages on console") \
839 \
840 product(bool, PrintGCApplicationConcurrentTime, false, \
841 "Print the time the application has been running") \
842 \
843 product(bool, PrintGCApplicationStoppedTime, false, \
844 "Print the time the application has been stopped") \
845 \
846 diagnostic(bool, VerboseVerification, false, \
847 "Display detailed verification details") \
848 \
849 notproduct(uintx, ErrorHandlerTest, 0, \
850 "If > 0, provokes an error after VM initialization; the value" \
851 "determines which error to provoke. See test_error_handler()" \
852 "in debug.cpp.") \
853 \
854 develop(bool, Verbose, false, \
855 "Prints additional debugging information from other modes") \
856 \
857 develop(bool, PrintMiscellaneous, false, \
858 "Prints uncategorized debugging information (requires +Verbose)") \
859 \
860 develop(bool, WizardMode, false, \
861 "Prints much more debugging information") \
862 \
863 product(bool, ShowMessageBoxOnError, false, \
864 "Keep process alive on VM fatal error") \
865 \
866 product(bool, CreateMinidumpOnCrash, false, \
867 "Create minidump on VM fatal error") \
868 \
869 product_pd(bool, UseOSErrorReporting, \
870 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
871 \
872 product(bool, SuppressFatalErrorMessage, false, \
873 "Do NO Fatal Error report [Avoid deadlock]") \
874 \
875 product(ccstrlist, OnError, "", \
876 "Run user-defined commands on fatal error; see VMError.cpp " \
877 "for examples") \
878 \
879 product(ccstrlist, OnOutOfMemoryError, "", \
880 "Run user-defined commands on first java.lang.OutOfMemoryError") \
881 \
882 manageable(bool, HeapDumpBeforeFullGC, false, \
883 "Dump heap to file before any major stop-world GC") \
884 \
885 manageable(bool, HeapDumpAfterFullGC, false, \
886 "Dump heap to file after any major stop-world GC") \
887 \
888 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
889 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
890 \
891 manageable(ccstr, HeapDumpPath, NULL, \
892 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
893 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
894 "in the working directory)") \
895 \
896 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
897 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
898 "when the heap usage is larger than this") \
899 \
900 develop(uintx, HeapDumpSegmentSize, 1*G, \
901 "Approximate segment size when generating a segmented heap dump") \
902 \
903 develop(bool, BreakAtWarning, false, \
904 "Execute breakpoint upon encountering VM warning") \
905 \
906 develop(bool, TraceVMOperation, false, \
907 "Trace vm operations") \
908 \
909 develop(bool, UseFakeTimers, false, \
910 "Tells whether the VM should use system time or a fake timer") \
911 \
912 product(ccstr, NativeMemoryTracking, "off", \
913 "Native memory tracking options") \
914 \
915 diagnostic(bool, PrintNMTStatistics, false, \
916 "Print native memory tracking summary data if it is on") \
917 \
918 diagnostic(bool, AutoShutdownNMT, true, \
919 "Automatically shutdown native memory tracking under stress " \
920 "situation. When set to false, native memory tracking tries to " \
921 "stay alive at the expense of JVM performance") \
922 \
923 diagnostic(bool, LogCompilation, false, \
924 "Log compilation activity in detail to LogFile") \
925 \
926 product(bool, PrintCompilation, false, \
927 "Print compilations") \
928 \
929 diagnostic(bool, TraceNMethodInstalls, false, \
930 "Trace nmethod intallation") \
931 \
932 diagnostic(intx, ScavengeRootsInCode, 2, \
933 "0: do not allow scavengable oops in the code cache; " \
934 "1: allow scavenging from the code cache; " \
935 "2: emit as many constants as the compiler can see") \
936 \
937 product(bool, AlwaysRestoreFPU, false, \
938 "Restore the FPU control word after every JNI call (expensive)") \
939 \
940 diagnostic(bool, PrintCompilation2, false, \
941 "Print additional statistics per compilation") \
942 \
943 diagnostic(bool, PrintAdapterHandlers, false, \
944 "Print code generated for i2c/c2i adapters") \
945 \
946 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
947 "Verify that i2c/c2i adapters are called properly") \
948 \
949 develop(bool, VerifyAdapterSharing, false, \
950 "Verify that the code for shared adapters is the equivalent") \
951 \
952 diagnostic(bool, PrintAssembly, false, \
953 "Print assembly code (using external disassembler.so)") \
954 \
955 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
956 "Options string passed to disassembler.so") \
957 \
958 diagnostic(bool, PrintNMethods, false, \
959 "Print assembly code for nmethods when generated") \
960 \
961 diagnostic(bool, PrintNativeNMethods, false, \
962 "Print assembly code for native nmethods when generated") \
963 \
964 develop(bool, PrintDebugInfo, false, \
965 "Print debug information for all nmethods when generated") \
966 \
967 develop(bool, PrintRelocations, false, \
968 "Print relocation information for all nmethods when generated") \
969 \
970 develop(bool, PrintDependencies, false, \
971 "Print dependency information for all nmethods when generated") \
972 \
973 develop(bool, PrintExceptionHandlers, false, \
974 "Print exception handler tables for all nmethods when generated") \
975 \
976 develop(bool, StressCompiledExceptionHandlers, false, \
977 "Exercise compiled exception handlers") \
978 \
979 develop(bool, InterceptOSException, false, \
980 "Starts debugger when an implicit OS (e.g., NULL) " \
981 "exception happens") \
982 \
983 product(bool, PrintCodeCache, false, \
984 "Print the code cache memory usage when exiting") \
985 \
986 develop(bool, PrintCodeCache2, false, \
987 "Print detailed usage info on the code cache when exiting") \
988 \
989 product(bool, PrintCodeCacheOnCompilation, false, \
990 "Print the code cache memory usage each time a method is compiled") \
991 \
992 diagnostic(bool, PrintStubCode, false, \
993 "Print generated stub code") \
994 \
995 product(bool, StackTraceInThrowable, true, \
996 "Collect backtrace in throwable when exception happens") \
997 \
998 product(bool, OmitStackTraceInFastThrow, true, \
999 "Omit backtraces for some 'hot' exceptions in optimized code") \
1000 \
1001 product(bool, ProfilerPrintByteCodeStatistics, false, \
1002 "Prints byte code statictics when dumping profiler output") \
1003 \
1004 product(bool, ProfilerRecordPC, false, \
1005 "Collects tick for each 16 byte interval of compiled code") \
1006 \
1007 product(bool, ProfileVM, false, \
1008 "Profiles ticks that fall within VM (either in the VM Thread " \
1009 "or VM code called through stubs)") \
1010 \
1011 product(bool, ProfileIntervals, false, \
1012 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
1013 \
1014 notproduct(bool, ProfilerCheckIntervals, false, \
1015 "Collect and print info on spacing of profiler ticks") \
1016 \
1017 develop(bool, PrintJVMWarnings, false, \
1018 "Prints warnings for unimplemented JVM functions") \
1019 \
1020 product(bool, PrintWarnings, true, \
1021 "Prints JVM warnings to output stream") \
1022 \
1023 notproduct(uintx, WarnOnStalledSpinLock, 0, \
1024 "Prints warnings for stalled SpinLocks") \
1025 \
1026 product(bool, RegisterFinalizersAtInit, true, \
1027 "Register finalizable objects at end of Object.<init> or " \
1028 "after allocation") \
1029 \
1030 develop(bool, RegisterReferences, true, \
1031 "Tells whether the VM should register soft/weak/final/phantom " \
1032 "references") \
1033 \
1034 develop(bool, IgnoreRewrites, false, \
1035 "Supress rewrites of bytecodes in the oopmap generator. " \
1036 "This is unsafe!") \
1037 \
1038 develop(bool, PrintCodeCacheExtension, false, \
1039 "Print extension of code cache") \
1040 \
1041 develop(bool, UsePrivilegedStack, true, \
1042 "Enable the security JVM functions") \
1043 \
1044 develop(bool, ProtectionDomainVerification, true, \
1045 "Verifies protection domain before resolution in system " \
1046 "dictionary") \
1047 \
1048 product(bool, ClassUnloading, true, \
1049 "Do unloading of classes") \
1050 \
1051 develop(bool, DisableStartThread, false, \
1052 "Disable starting of additional Java threads " \
1053 "(for debugging only)") \
1054 \
1055 develop(bool, MemProfiling, false, \
1056 "Write memory usage profiling to log file") \
1057 \
1058 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1059 "Prints the system dictionary at exit") \
1060 \
1061 experimental(intx, PredictedLoadedClassCount, 0, \
1062 "Experimental: Tune loaded class cache starting size.") \
1063 \
1064 diagnostic(bool, UnsyncloadClass, false, \
1065 "Unstable: VM calls loadClass unsynchronized. Custom " \
1066 "class loader must call VM synchronized for findClass " \
1067 "and defineClass.") \
1068 \
1069 product(bool, AlwaysLockClassLoader, false, \
1070 "Require the VM to acquire the class loader lock before calling " \
1071 "loadClass() even for class loaders registering " \
1072 "as parallel capable") \
1073 \
1074 product(bool, AllowParallelDefineClass, false, \
1075 "Allow parallel defineClass requests for class loaders " \
1076 "registering as parallel capable") \
1077 \
1078 product(bool, MustCallLoadClassInternal, false, \
1079 "Call loadClassInternal() rather than loadClass()") \
1080 \
1081 product_pd(bool, DontYieldALot, \
1082 "Throw away obvious excess yield calls (for SOLARIS only)") \
1083 \
1084 product_pd(bool, ConvertSleepToYield, \
1085 "Converts sleep(0) to thread yield " \
1086 "(may be off for SOLARIS to improve GUI)") \
1087 \
1088 product(bool, ConvertYieldToSleep, false, \
1089 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
1090 "behavior (SOLARIS only)") \
1091 \
1092 product(bool, UseBoundThreads, true, \
1093 "Bind user level threads to kernel threads (for SOLARIS only)") \
1094 \
1095 develop(bool, UseDetachedThreads, true, \
1096 "Use detached threads that are recycled upon termination " \
1097 "(for SOLARIS only)") \
1098 \
1099 product(bool, UseLWPSynchronization, true, \
1100 "Use LWP-based instead of libthread-based synchronization " \
1101 "(SPARC only)") \
1102 \
1103 product(ccstr, SyncKnobs, NULL, \
1104 "(Unstable) Various monitor synchronization tunables") \
1105 \
1106 product(intx, EmitSync, 0, \
1107 "(Unsafe,Unstable) " \
1108 " Controls emission of inline sync fast-path code") \
1109 \
1110 product(intx, MonitorBound, 0, "Bound Monitor population") \
1111 \
1112 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1113 \
1114 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
1115 \
1116 product(intx, SyncVerbose, 0, "(Unstable)" ) \
1117 \
1118 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
1119 \
1120 product(intx, hashCode, 5, \
1121 "(Unstable) select hashCode generation algorithm" ) \
1122 \
1123 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1124 "(Unstable, Linux-specific)" \
1125 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
1126 \
1127 product(bool, FilterSpuriousWakeups, true, \
1128 "Prevent spurious or premature wakeups from object.wait " \
1129 "(Solaris only)") \
1130 \
1131 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
1132 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
1133 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
1134 \
1135 develop(bool, UsePthreads, false, \
1136 "Use pthread-based instead of libthread-based synchronization " \
1137 "(SPARC only)") \
1138 \
1139 product(bool, AdjustConcurrency, false, \
1140 "call thr_setconcurrency at thread create time to avoid " \
1141 "LWP starvation on MP systems (For Solaris Only)") \
1142 \
1143 product(bool, ReduceSignalUsage, false, \
1144 "Reduce the use of OS signals in Java and/or the VM") \
1145 \
1146 develop_pd(bool, ShareVtableStubs, \
1147 "Share vtable stubs (smaller code but worse branch prediction") \
1148 \
1149 develop(bool, LoadLineNumberTables, true, \
1150 "Tells whether the class file parser loads line number tables") \
1151 \
1152 develop(bool, LoadLocalVariableTables, true, \
1153 "Tells whether the class file parser loads local variable tables")\
1154 \
1155 develop(bool, LoadLocalVariableTypeTables, true, \
1156 "Tells whether the class file parser loads local variable type tables")\
1157 \
1158 product(bool, AllowUserSignalHandlers, false, \
1159 "Do not complain if the application installs signal handlers " \
1160 "(Solaris & Linux only)") \
1161 \
1162 product(bool, UseSignalChaining, true, \
1163 "Use signal-chaining to invoke signal handlers installed " \
1164 "by the application (Solaris & Linux only)") \
1165 \
1166 product(bool, UseAltSigs, false, \
1167 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1168 "internal signals (Solaris only)") \
1169 \
1170 product(bool, AllowJNIEnvProxy, false, \
1171 "Allow JNIEnv proxies for jdbx") \
1172 \
1173 product(bool, JNIDetachReleasesMonitors, true, \
1174 "JNI DetachCurrentThread releases monitors owned by thread") \
1175 \
1176 product(bool, RestoreMXCSROnJNICalls, false, \
1177 "Restore MXCSR when returning from JNI calls") \
1178 \
1179 product(bool, CheckJNICalls, false, \
1180 "Verify all arguments to JNI calls") \
1181 \
1182 product(bool, UseFastJNIAccessors, true, \
1183 "Use optimized versions of Get<Primitive>Field") \
1184 \
1185 product(bool, EagerXrunInit, false, \
1186 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1187 " but not all -Xrun libraries may support the state of the VM at this time") \
1188 \
1189 product(bool, PreserveAllAnnotations, false, \
1190 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
1191 \
1192 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1193 "Number of OutOfMemoryErrors preallocated with backtrace") \
1194 \
1195 product(bool, LazyBootClassLoader, true, \
1196 "Enable/disable lazy opening of boot class path entries") \
1197 \
1198 product(bool, UseXMMForArrayCopy, false, \
1199 "Use SSE2 MOVQ instruction for Arraycopy") \
1200 \
1201 product(intx, FieldsAllocationStyle, 1, \
1202 "0 - type based with oops first, 1 - with oops last, " \
1203 "2 - oops in super and sub classes are together") \
1204 \
1205 product(bool, CompactFields, true, \
1206 "Allocate nonstatic fields in gaps between previous fields") \
1207 \
1208 notproduct(bool, PrintFieldLayout, false, \
1209 "Print field layout for each class") \
1210 \
1211 product(intx, ContendedPaddingWidth, 128, \
1212 "How many bytes to pad the fields/classes marked @Contended with")\
1213 \
1214 product(bool, EnableContended, true, \
1215 "Enable @Contended annotation support") \
1216 \
1217 product(bool, RestrictContended, true, \
1218 "Restrict @Contended to trusted classes") \
1219 \
1220 product(bool, UseBiasedLocking, true, \
1221 "Enable biased locking in JVM") \
1222 \
1223 product(intx, BiasedLockingStartupDelay, 4000, \
1224 "Number of milliseconds to wait before enabling biased locking") \
1225 \
1226 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1227 "Print statistics of biased locking in JVM") \
1228 \
1229 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1230 "Threshold of number of revocations per type to try to " \
1231 "rebias all objects in the heap of that type") \
1232 \
1233 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1234 "Threshold of number of revocations per type to permanently " \
1235 "revoke biases of all objects in the heap of that type") \
1236 \
1237 product(intx, BiasedLockingDecayTime, 25000, \
1238 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1239 "type after previous bulk rebias") \
1240 \
1241 /* tracing */ \
1242 \
1243 notproduct(bool, TraceRuntimeCalls, false, \
1244 "Trace run-time calls") \
1245 \
1246 develop(bool, TraceJNICalls, false, \
1247 "Trace JNI calls") \
1248 \
1249 notproduct(bool, TraceJVMCalls, false, \
1250 "Trace JVM calls") \
1251 \
1252 product(ccstr, TraceJVMTI, NULL, \
1253 "Trace flags for JVMTI functions and events") \
1254 \
1255 /* This option can change an EMCP method into an obsolete method. */ \
1256 /* This can affect tests that except specific methods to be EMCP. */ \
1257 /* This option should be used with caution. */ \
1258 product(bool, StressLdcRewrite, false, \
1259 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1260 \
1261 product(intx, TraceRedefineClasses, 0, \
1262 "Trace level for JVMTI RedefineClasses") \
1263 \
1264 develop(bool, StressMethodComparator, false, \
1265 "run the MethodComparator on all loaded methods") \
1266 \
1267 /* change to false by default sometime after Mustang */ \
1268 product(bool, VerifyMergedCPBytecodes, true, \
1269 "Verify bytecodes after RedefineClasses constant pool merging") \
1270 \
1271 develop(bool, TraceJNIHandleAllocation, false, \
1272 "Trace allocation/deallocation of JNI handle blocks") \
1273 \
1274 develop(bool, TraceThreadEvents, false, \
1275 "Trace all thread events") \
1276 \
1277 develop(bool, TraceBytecodes, false, \
1278 "Trace bytecode execution") \
1279 \
1280 develop(bool, TraceClassInitialization, false, \
1281 "Trace class initialization") \
1282 \
1283 develop(bool, TraceExceptions, false, \
1284 "Trace exceptions") \
1285 \
1286 develop(bool, TraceICs, false, \
1287 "Trace inline cache changes") \
1288 \
1289 notproduct(bool, TraceInvocationCounterOverflow, false, \
1290 "Trace method invocation counter overflow") \
1291 \
1292 develop(bool, TraceInlineCacheClearing, false, \
1293 "Trace clearing of inline caches in nmethods") \
1294 \
1295 develop(bool, TraceDependencies, false, \
1296 "Trace dependencies") \
1297 \
1298 develop(bool, VerifyDependencies, trueInDebug, \
1299 "Exercise and verify the compilation dependency mechanism") \
1300 \
1301 develop(bool, TraceNewOopMapGeneration, false, \
1302 "Trace OopMapGeneration") \
1303 \
1304 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1305 "Trace OopMapGeneration: print detailed cell states") \
1306 \
1307 develop(bool, TimeOopMap, false, \
1308 "Time calls to GenerateOopMap::compute_map() in sum") \
1309 \
1310 develop(bool, TimeOopMap2, false, \
1311 "Time calls to GenerateOopMap::compute_map() individually") \
1312 \
1313 develop(bool, TraceMonitorMismatch, false, \
1314 "Trace monitor matching failures during OopMapGeneration") \
1315 \
1316 develop(bool, TraceOopMapRewrites, false, \
1317 "Trace rewritting of method oops during oop map generation") \
1318 \
1319 develop(bool, TraceSafepoint, false, \
1320 "Trace safepoint operations") \
1321 \
1322 develop(bool, TraceICBuffer, false, \
1323 "Trace usage of IC buffer") \
1324 \
1325 develop(bool, TraceCompiledIC, false, \
1326 "Trace changes of compiled IC") \
1327 \
1328 notproduct(bool, TraceZapDeadLocals, false, \
1329 "Trace zapping dead locals") \
1330 \
1331 develop(bool, TraceStartupTime, false, \
1332 "Trace setup time") \
1333 \
1334 develop(bool, TraceProtectionDomainVerification, false, \
1335 "Trace protection domain verifcation") \
1336 \
1337 develop(bool, TraceClearedExceptions, false, \
1338 "Prints when an exception is forcibly cleared") \
1339 \
1340 product(bool, TraceClassResolution, false, \
1341 "Trace all constant pool resolutions (for debugging)") \
1342 \
1343 product(bool, TraceBiasedLocking, false, \
1344 "Trace biased locking in JVM") \
1345 \
1346 product(bool, TraceMonitorInflation, false, \
1347 "Trace monitor inflation in JVM") \
1348 \
1349 /* gc */ \
1350 \
1351 product(bool, UseSerialGC, false, \
1352 "Use the serial garbage collector") \
1353 \
1354 product(bool, UseG1GC, false, \
1355 "Use the Garbage-First garbage collector") \
1356 \
1357 product(bool, UseParallelGC, false, \
1358 "Use the Parallel Scavenge garbage collector") \
1359 \
1360 product(bool, UseParallelOldGC, false, \
1361 "Use the Parallel Old garbage collector") \
1362 \
1363 product(uintx, HeapMaximumCompactionInterval, 20, \
1364 "How often should we maximally compact the heap (not allowing " \
1365 "any dead space)") \
1366 \
1367 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1368 "The collection count for the first maximum compaction") \
1369 \
1370 product(bool, UseMaximumCompactionOnSystemGC, true, \
1371 "In the Parallel Old garbage collector maximum compaction for " \
1372 "a system GC") \
1373 \
1374 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1375 "The mean used by the par compact dead wood" \
1376 "limiter (a number between 0-100).") \
1377 \
1378 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1379 "The standard deviation used by the par compact dead wood" \
1380 "limiter (a number between 0-100).") \
1381 \
1382 product(uintx, ParallelGCThreads, 0, \
1383 "Number of parallel threads parallel gc will use") \
1384 \
1385 product(bool, UseDynamicNumberOfGCThreads, false, \
1386 "Dynamically choose the number of parallel threads " \
1387 "parallel gc will use") \
1388 \
1389 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1390 "Force dynamic selection of the number of" \
1391 "parallel threads parallel gc will use to aid debugging") \
1392 \
1393 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1394 "Size of heap (bytes) per GC thread used in calculating the " \
1395 "number of GC threads") \
1396 \
1397 product(bool, TraceDynamicGCThreads, false, \
1398 "Trace the dynamic GC thread usage") \
1399 \
1400 develop(bool, ParallelOldGCSplitALot, false, \
1401 "Provoke splitting (copying data from a young gen space to" \
1402 "multiple destination spaces)") \
1403 \
1404 develop(uintx, ParallelOldGCSplitInterval, 3, \
1405 "How often to provoke splitting a young gen space") \
1406 \
1407 product(uintx, ConcGCThreads, 0, \
1408 "Number of threads concurrent gc will use") \
1409 \
1410 product(uintx, YoungPLABSize, 4096, \
1411 "Size of young gen promotion labs (in HeapWords)") \
1412 \
1413 product(uintx, OldPLABSize, 1024, \
1414 "Size of old gen promotion labs (in HeapWords)") \
1415 \
1416 product(uintx, GCTaskTimeStampEntries, 200, \
1417 "Number of time stamp entries per gc worker thread") \
1418 \
1419 product(bool, AlwaysTenure, false, \
1420 "Always tenure objects in eden. (ParallelGC only)") \
1421 \
1422 product(bool, NeverTenure, false, \
1423 "Never tenure objects in eden, May tenure on overflow " \
1424 "(ParallelGC only)") \
1425 \
1426 product(bool, ScavengeBeforeFullGC, true, \
1427 "Scavenge youngest generation before each full GC, " \
1428 "used with UseParallelGC") \
1429 \
1430 develop(bool, ScavengeWithObjectsInToSpace, false, \
1431 "Allow scavenges to occur when to_space contains objects.") \
1432 \
1433 product(bool, UseConcMarkSweepGC, false, \
1434 "Use Concurrent Mark-Sweep GC in the old generation") \
1435 \
1436 product(bool, ExplicitGCInvokesConcurrent, false, \
1437 "A System.gc() request invokes a concurrent collection;" \
1438 " (effective only when UseConcMarkSweepGC)") \
1439 \
1440 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1441 "A System.gc() request invokes a concurrent collection and " \
1442 "also unloads classes during such a concurrent gc cycle " \
1443 "(effective only when UseConcMarkSweepGC)") \
1444 \
1445 product(bool, GCLockerInvokesConcurrent, false, \
1446 "The exit of a JNI CS necessitating a scavenge also" \
1447 " kicks off a bkgrd concurrent collection") \
1448 \
1449 product(uintx, GCLockerEdenExpansionPercent, 5, \
1450 "How much the GC can expand the eden by while the GC locker " \
1451 "is active (as a percentage)") \
1452 \
1453 diagnostic(intx, GCLockerRetryAllocationCount, 2, \
1454 "Number of times to retry allocations when" \
1455 " blocked by the GC locker") \
1456 \
1457 develop(bool, UseCMSAdaptiveFreeLists, true, \
1458 "Use Adaptive Free Lists in the CMS generation") \
1459 \
1460 develop(bool, UseAsyncConcMarkSweepGC, true, \
1461 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1462 \
1463 develop(bool, RotateCMSCollectionTypes, false, \
1464 "Rotate the CMS collections among concurrent and STW") \
1465 \
1466 product(bool, UseCMSBestFit, true, \
1467 "Use CMS best fit allocation strategy") \
1468 \
1469 product(bool, UseCMSCollectionPassing, true, \
1470 "Use passing of collection from background to foreground") \
1471 \
1472 product(bool, UseParNewGC, false, \
1473 "Use parallel threads in the new generation.") \
1474 \
1475 product(bool, ParallelGCVerbose, false, \
1476 "Verbose output for parallel GC.") \
1477 \
1478 product(uintx, ParallelGCBufferWastePct, 10, \
1479 "Wasted fraction of parallel allocation buffer.") \
1480 \
1481 diagnostic(bool, ParallelGCRetainPLAB, false, \
1482 "Retain parallel allocation buffers across scavenges; " \
1483 " -- disabled because this currently conflicts with " \
1484 " parallel card scanning under certain conditions ") \
1485 \
1486 product(uintx, TargetPLABWastePct, 10, \
1487 "Target wasted space in last buffer as percent of overall " \
1488 "allocation") \
1489 \
1490 product(uintx, PLABWeight, 75, \
1491 "Percentage (0-100) used to weight the current sample when" \
1492 "computing exponentially decaying average for ResizePLAB.") \
1493 \
1494 product(bool, ResizePLAB, true, \
1495 "Dynamically resize (survivor space) promotion labs") \
1496 \
1497 product(bool, PrintPLAB, false, \
1498 "Print (survivor space) promotion labs sizing decisions") \
1499 \
1500 product(intx, ParGCArrayScanChunk, 50, \
1501 "Scan a subset and push remainder, if array is bigger than this") \
1502 \
1503 product(bool, ParGCUseLocalOverflow, false, \
1504 "Instead of a global overflow list, use local overflow stacks") \
1505 \
1506 product(bool, ParGCTrimOverflow, true, \
1507 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \
1508 \
1509 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1510 "Whether we should simulate work queue overflow in ParNew") \
1511 \
1512 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1513 "An `interval' counter that determines how frequently " \
1514 "we simulate overflow; a smaller number increases frequency") \
1515 \
1516 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1517 "The desired number of objects to claim from the overflow list") \
1518 \
1519 diagnostic(uintx, ParGCStridesPerThread, 2, \
1520 "The number of strides per worker thread that we divide up the " \
1521 "card table scanning work into") \
1522 \
1523 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1524 "The number of cards in each chunk of the parallel chunks used " \
1525 "during card table scanning") \
1526 \
1527 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1528 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1529 "parallel GC.") \
1530 \
1531 product(uintx, OldPLABWeight, 50, \
1532 "Percentage (0-100) used to weight the current sample when" \
1533 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \
1534 \
1535 product(bool, ResizeOldPLAB, true, \
1536 "Dynamically resize (old gen) promotion labs") \
1537 \
1538 product(bool, PrintOldPLAB, false, \
1539 "Print (old gen) promotion labs sizing decisions") \
1540 \
1541 product(uintx, CMSOldPLABMin, 16, \
1542 "Min size of CMS gen promotion lab caches per worker per blksize")\
1543 \
1544 product(uintx, CMSOldPLABMax, 1024, \
1545 "Max size of CMS gen promotion lab caches per worker per blksize")\
1546 \
1547 product(uintx, CMSOldPLABNumRefills, 4, \
1548 "Nominal number of refills of CMS gen promotion lab cache" \
1549 " per worker per block size") \
1550 \
1551 product(bool, CMSOldPLABResizeQuicker, false, \
1552 "Whether to react on-the-fly during a scavenge to a sudden" \
1553 " change in block demand rate") \
1554 \
1555 product(uintx, CMSOldPLABToleranceFactor, 4, \
1556 "The tolerance of the phase-change detector for on-the-fly" \
1557 " PLAB resizing during a scavenge") \
1558 \
1559 product(uintx, CMSOldPLABReactivityFactor, 2, \
1560 "The gain in the feedback loop for on-the-fly PLAB resizing" \
1561 " during a scavenge") \
1562 \
1563 product(bool, AlwaysPreTouch, false, \
1564 "It forces all freshly committed pages to be pre-touched.") \
1565 \
1566 product_pd(uintx, CMSYoungGenPerWorker, \
1567 "The maximum size of young gen chosen by default per GC worker " \
1568 "thread available") \
1569 \
1570 product(bool, CMSIncrementalMode, false, \
1571 "Whether CMS GC should operate in \"incremental\" mode") \
1572 \
1573 product(uintx, CMSIncrementalDutyCycle, 10, \
1574 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1575 "CMSIncrementalPacing is enabled, then this is just the initial" \
1576 "value") \
1577 \
1578 product(bool, CMSIncrementalPacing, true, \
1579 "Whether the CMS incremental mode duty cycle should be " \
1580 "automatically adjusted") \
1581 \
1582 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1583 "Lower bound on the duty cycle when CMSIncrementalPacing is " \
1584 "enabled (a percentage, 0-100)") \
1585 \
1586 product(uintx, CMSIncrementalSafetyFactor, 10, \
1587 "Percentage (0-100) used to add conservatism when computing the " \
1588 "duty cycle") \
1589 \
1590 product(uintx, CMSIncrementalOffset, 0, \
1591 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1592 " is shifted to the right within the period between young GCs") \
1593 \
1594 product(uintx, CMSExpAvgFactor, 50, \
1595 "Percentage (0-100) used to weight the current sample when" \
1596 "computing exponential averages for CMS statistics.") \
1597 \
1598 product(uintx, CMS_FLSWeight, 75, \
1599 "Percentage (0-100) used to weight the current sample when" \
1600 "computing exponentially decating averages for CMS FLS statistics.") \
1601 \
1602 product(uintx, CMS_FLSPadding, 1, \
1603 "The multiple of deviation from mean to use for buffering" \
1604 "against volatility in free list demand.") \
1605 \
1606 product(uintx, FLSCoalescePolicy, 2, \
1607 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1608 \
1609 product(bool, FLSAlwaysCoalesceLarge, false, \
1610 "CMS: Larger free blocks are always available for coalescing") \
1611 \
1612 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1613 "CMS: the smaller the percentage the greater the coalition force")\
1614 \
1615 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1616 "CMS: the factor by which to inflate estimated demand of small" \
1617 " block sizes to prevent coalescing with an adjoining block") \
1618 \
1619 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1620 "CMS: the factor by which to inflate estimated demand of large" \
1621 " block sizes to prevent coalescing with an adjoining block") \
1622 \
1623 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1624 "CMS: the factor by which to inflate estimated demand of small" \
1625 " block sizes to prevent splitting to supply demand for smaller" \
1626 " blocks") \
1627 \
1628 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1629 "CMS: the factor by which to inflate estimated demand of large" \
1630 " block sizes to prevent splitting to supply demand for smaller" \
1631 " blocks") \
1632 \
1633 product(bool, CMSExtrapolateSweep, false, \
1634 "CMS: cushion for block demand during sweep") \
1635 \
1636 product(uintx, CMS_SweepWeight, 75, \
1637 "Percentage (0-100) used to weight the current sample when " \
1638 "computing exponentially decaying average for inter-sweep " \
1639 "duration") \
1640 \
1641 product(uintx, CMS_SweepPadding, 1, \
1642 "The multiple of deviation from mean to use for buffering " \
1643 "against volatility in inter-sweep duration.") \
1644 \
1645 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1646 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1647 "duration exceeds this threhold in milliseconds") \
1648 \
1649 develop(bool, CMSTraceIncrementalMode, false, \
1650 "Trace CMS incremental mode") \
1651 \
1652 develop(bool, CMSTraceIncrementalPacing, false, \
1653 "Trace CMS incremental mode pacing computation") \
1654 \
1655 develop(bool, CMSTraceThreadState, false, \
1656 "Trace the CMS thread state (enable the trace_state() method)") \
1657 \
1658 product(bool, CMSClassUnloadingEnabled, true, \
1659 "Whether class unloading enabled when using CMS GC") \
1660 \
1661 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1662 "When CMS class unloading is enabled, the maximum CMS cycle count"\
1663 " for which classes may not be unloaded") \
1664 \
1665 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1666 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1667 \
1668 product(bool, UseCMSCompactAtFullCollection, true, \
1669 "Use mark sweep compact at full collections") \
1670 \
1671 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1672 "Number of CMS full collection done before compaction if > 0") \
1673 \
1674 develop(intx, CMSDictionaryChoice, 0, \
1675 "Use BinaryTreeDictionary as default in the CMS generation") \
1676 \
1677 product(uintx, CMSIndexedFreeListReplenish, 4, \
1678 "Replenish an indexed free list with this number of chunks") \
1679 \
1680 product(bool, CMSReplenishIntermediate, true, \
1681 "Replenish all intermediate free-list caches") \
1682 \
1683 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1684 "When satisfying batched demand, split blocks from the " \
1685 "IndexedFreeList whose size is a multiple of requested size") \
1686 \
1687 product(bool, CMSLoopWarn, false, \
1688 "Warn in case of excessive CMS looping") \
1689 \
1690 develop(bool, CMSOverflowEarlyRestoration, false, \
1691 "Whether preserved marks should be restored early") \
1692 \
1693 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1694 "Size of marking stack") \
1695 \
1696 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1697 "Max size of marking stack") \
1698 \
1699 notproduct(bool, CMSMarkStackOverflowALot, false, \
1700 "Whether we should simulate frequent marking stack / work queue" \
1701 " overflow") \
1702 \
1703 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1704 "An `interval' counter that determines how frequently" \
1705 " we simulate overflow; a smaller number increases frequency") \
1706 \
1707 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1708 "(Temporary, subject to experimentation)" \
1709 "Maximum number of abortable preclean iterations, if > 0") \
1710 \
1711 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1712 "(Temporary, subject to experimentation)" \
1713 "Maximum time in abortable preclean in ms") \
1714 \
1715 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1716 "(Temporary, subject to experimentation)" \
1717 "Nominal minimum work per abortable preclean iteration") \
1718 \
1719 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1720 "(Temporary, subject to experimentation)" \
1721 " Time that we sleep between iterations when not given" \
1722 " enough work per iteration") \
1723 \
1724 product(uintx, CMSRescanMultiple, 32, \
1725 "Size (in cards) of CMS parallel rescan task") \
1726 \
1727 product(uintx, CMSConcMarkMultiple, 32, \
1728 "Size (in cards) of CMS concurrent MT marking task") \
1729 \
1730 product(bool, CMSAbortSemantics, false, \
1731 "Whether abort-on-overflow semantics is implemented") \
1732 \
1733 product(bool, CMSParallelInitialMarkEnabled, true, \
1734 "Use the parallel initial mark.") \
1735 \
1736 product(bool, CMSParallelRemarkEnabled, true, \
1737 "Whether parallel remark enabled (only if ParNewGC)") \
1738 \
1739 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1740 "Whether parallel remark of survivor space" \
1741 " enabled (effective only if CMSParallelRemarkEnabled)") \
1742 \
1743 product(bool, CMSPLABRecordAlways, true, \
1744 "Whether to always record survivor space PLAB bdries" \
1745 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1746 \
1747 product(bool, CMSEdenChunksRecordAlways, true, \
1748 "Whether to always record eden chunks used for " \
1749 "the parallel initial mark or remark of eden" ) \
1750 \
1751 product(bool, CMSPrintEdenSurvivorChunks, false, \
1752 "Print the eden and the survivor chunks used for the parallel " \
1753 "initial mark or remark of the eden/survivor spaces") \
1754 \
1755 product(bool, CMSConcurrentMTEnabled, true, \
1756 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1757 \
1758 product(bool, CMSPrecleaningEnabled, true, \
1759 "Whether concurrent precleaning enabled") \
1760 \
1761 product(uintx, CMSPrecleanIter, 3, \
1762 "Maximum number of precleaning iteration passes") \
1763 \
1764 product(uintx, CMSPrecleanNumerator, 2, \
1765 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1766 " ratio") \
1767 \
1768 product(uintx, CMSPrecleanDenominator, 3, \
1769 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1770 " ratio") \
1771 \
1772 product(bool, CMSPrecleanRefLists1, true, \
1773 "Preclean ref lists during (initial) preclean phase") \
1774 \
1775 product(bool, CMSPrecleanRefLists2, false, \
1776 "Preclean ref lists during abortable preclean phase") \
1777 \
1778 product(bool, CMSPrecleanSurvivors1, false, \
1779 "Preclean survivors during (initial) preclean phase") \
1780 \
1781 product(bool, CMSPrecleanSurvivors2, true, \
1782 "Preclean survivors during abortable preclean phase") \
1783 \
1784 product(uintx, CMSPrecleanThreshold, 1000, \
1785 "Don't re-iterate if #dirty cards less than this") \
1786 \
1787 product(bool, CMSCleanOnEnter, true, \
1788 "Clean-on-enter optimization for reducing number of dirty cards") \
1789 \
1790 product(uintx, CMSRemarkVerifyVariant, 1, \
1791 "Choose variant (1,2) of verification following remark") \
1792 \
1793 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1794 "If Eden used is below this value, don't try to schedule remark") \
1795 \
1796 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1797 "The Eden occupancy % at which to try and schedule remark pause") \
1798 \
1799 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1800 "Start sampling Eden top at least before yg occupancy reaches" \
1801 " 1/<ratio> of the size at which we plan to schedule remark") \
1802 \
1803 product(uintx, CMSSamplingGrain, 16*K, \
1804 "The minimum distance between eden samples for CMS (see above)") \
1805 \
1806 product(bool, CMSScavengeBeforeRemark, false, \
1807 "Attempt scavenge before the CMS remark step") \
1808 \
1809 develop(bool, CMSTraceSweeper, false, \
1810 "Trace some actions of the CMS sweeper") \
1811 \
1812 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1813 "Don't drain below this size per parallel worker/thief") \
1814 \
1815 manageable(intx, CMSWaitDuration, 2000, \
1816 "Time in milliseconds that CMS thread waits for young GC") \
1817 \
1818 develop(uintx, CMSCheckInterval, 1000, \
1819 "Interval in milliseconds that CMS thread checks if it " \
1820 "should start a collection cycle") \
1821 \
1822 product(bool, CMSYield, true, \
1823 "Yield between steps of concurrent mark & sweep") \
1824 \
1825 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1826 "Bitmap operations should process at most this many bits" \
1827 "between yields") \
1828 \
1829 product(bool, CMSDumpAtPromotionFailure, false, \
1830 "Dump useful information about the state of the CMS old " \
1831 " generation upon a promotion failure.") \
1832 \
1833 product(bool, CMSPrintChunksInDump, false, \
1834 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1835 " more detailed information about the free chunks.") \
1836 \
1837 product(bool, CMSPrintObjectsInDump, false, \
1838 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1839 " more detailed information about the allocated objects.") \
1840 \
1841 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1842 "Verify that all refs across the FLS boundary " \
1843 " are to valid objects") \
1844 \
1845 diagnostic(bool, FLSVerifyLists, false, \
1846 "Do lots of (expensive) FreeListSpace verification") \
1847 \
1848 diagnostic(bool, FLSVerifyIndexTable, false, \
1849 "Do lots of (expensive) FLS index table verification") \
1850 \
1851 develop(bool, FLSVerifyDictionary, false, \
1852 "Do lots of (expensive) FLS dictionary verification") \
1853 \
1854 develop(bool, VerifyBlockOffsetArray, false, \
1855 "Do (expensive!) block offset array verification") \
1856 \
1857 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1858 "Maintain _unallocated_block in BlockOffsetArray" \
1859 " (currently applicable only to CMS collector)") \
1860 \
1861 develop(bool, TraceCMSState, false, \
1862 "Trace the state of the CMS collection") \
1863 \
1864 product(intx, RefDiscoveryPolicy, 0, \
1865 "Whether reference-based(0) or referent-based(1)") \
1866 \
1867 product(bool, ParallelRefProcEnabled, false, \
1868 "Enable parallel reference processing whenever possible") \
1869 \
1870 product(bool, ParallelRefProcBalancingEnabled, true, \
1871 "Enable balancing of reference processing queues") \
1872 \
1873 product(uintx, CMSTriggerRatio, 80, \
1874 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1875 "allocated before a CMS collection cycle commences") \
1876 \
1877 product(uintx, CMSBootstrapOccupancy, 50, \
1878 "Percentage CMS generation occupancy at which to " \
1879 "initiate CMS collection for bootstrapping collection stats") \
1880 \
1881 product(intx, CMSInitiatingOccupancyFraction, -1, \
1882 "Percentage CMS generation occupancy to start a CMS collection " \
1883 "cycle. A negative value means that CMSTriggerRatio is used") \
1884 \
1885 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1886 "Percentage of the (entire) heap occupancy to start a " \
1887 "concurrent GC cycle. It is used by GCs that trigger a " \
1888 "concurrent GC cycle based on the occupancy of the entire heap, " \
1889 "not just one of the generations (e.g., G1). A value of 0 " \
1890 "denotes 'do constant GC cycles'.") \
1891 \
1892 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1893 "Only use occupancy as a crierion for starting a CMS collection") \
1894 \
1895 product(uintx, CMSIsTooFullPercentage, 98, \
1896 "An absolute ceiling above which CMS will always consider the " \
1897 "unloading of classes when class unloading is enabled") \
1898 \
1899 develop(bool, CMSTestInFreeList, false, \
1900 "Check if the coalesced range is already in the " \
1901 "free lists as claimed") \
1902 \
1903 notproduct(bool, CMSVerifyReturnedBytes, false, \
1904 "Check that all the garbage collected was returned to the " \
1905 "free lists.") \
1906 \
1907 notproduct(bool, ScavengeALot, false, \
1908 "Force scavenge at every Nth exit from the runtime system " \
1909 "(N=ScavengeALotInterval)") \
1910 \
1911 develop(bool, FullGCALot, false, \
1912 "Force full gc at every Nth exit from the runtime system " \
1913 "(N=FullGCALotInterval)") \
1914 \
1915 notproduct(bool, GCALotAtAllSafepoints, false, \
1916 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1917 \
1918 product(bool, PrintPromotionFailure, false, \
1919 "Print additional diagnostic information following " \
1920 " promotion failure") \
1921 \
1922 notproduct(bool, PromotionFailureALot, false, \
1923 "Use promotion failure handling on every youngest generation " \
1924 "collection") \
1925 \
1926 develop(uintx, PromotionFailureALotCount, 1000, \
1927 "Number of promotion failures occurring at ParGCAllocBuffer" \
1928 "refill attempts (ParNew) or promotion attempts " \
1929 "(other young collectors) ") \
1930 \
1931 develop(uintx, PromotionFailureALotInterval, 5, \
1932 "Total collections between promotion failures alot") \
1933 \
1934 experimental(uintx, WorkStealingSleepMillis, 1, \
1935 "Sleep time when sleep is used for yields") \
1936 \
1937 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
1938 "Number of yields before a sleep is done during workstealing") \
1939 \
1940 experimental(uintx, WorkStealingHardSpins, 4096, \
1941 "Number of iterations in a spin loop between checks on " \
1942 "time out of hard spin") \
1943 \
1944 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
1945 "Ratio of hard spins to calls to yield") \
1946 \
1947 develop(uintx, ObjArrayMarkingStride, 512, \
1948 "Number of ObjArray elements to push onto the marking stack" \
1949 "before pushing a continuation entry") \
1950 \
1951 develop(bool, MetadataAllocationFailALot, false, \
1952 "Fail metadata allocations at intervals controlled by " \
1953 "MetadataAllocationFailALotInterval") \
1954 \
1955 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
1956 "metadata allocation failure alot interval") \
1957 \
1958 develop(bool, MetaDataDeallocateALot, false, \
1959 "Deallocation bunches of metadata at intervals controlled by " \
1960 "MetaDataAllocateALotInterval") \
1961 \
1962 develop(uintx, MetaDataDeallocateALotInterval, 100, \
1963 "Metadata deallocation alot interval") \
1964 \
1965 develop(bool, TraceMetadataChunkAllocation, false, \
1966 "Trace chunk metadata allocations") \
1967 \
1968 product(bool, TraceMetadataHumongousAllocation, false, \
1969 "Trace humongous metadata allocations") \
1970 \
1971 develop(bool, TraceMetavirtualspaceAllocation, false, \
1972 "Trace virtual space metadata allocations") \
1973 \
1974 notproduct(bool, ExecuteInternalVMTests, false, \
1975 "Enable execution of internal VM tests.") \
1976 \
1977 notproduct(bool, VerboseInternalVMTests, false, \
1978 "Turn on logging for internal VM tests.") \
1979 \
1980 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
1981 \
1982 product_pd(bool, ResizeTLAB, \
1983 "Dynamically resize tlab size for threads") \
1984 \
1985 product(bool, ZeroTLAB, false, \
1986 "Zero out the newly created TLAB") \
1987 \
1988 product(bool, FastTLABRefill, true, \
1989 "Use fast TLAB refill code") \
1990 \
1991 product(bool, PrintTLAB, false, \
1992 "Print various TLAB related information") \
1993 \
1994 product(bool, TLABStats, true, \
1995 "Print various TLAB related information") \
1996 \
1997 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \
1998 "Enable LowMemoryProtection")) \
1999 \
2000 product_pd(bool, NeverActAsServerClassMachine, \
2001 "Never act like a server-class machine") \
2002 \
2003 product(bool, AlwaysActAsServerClassMachine, false, \
2004 "Always act like a server-class machine") \
2005 \
2006 product_pd(uint64_t, MaxRAM, \
2007 "Real memory size (in bytes) used to set maximum heap size") \
2008 \
2009 product(uintx, ErgoHeapSizeLimit, 0, \
2010 "Maximum ergonomically set heap size (in bytes); zero means use " \
2011 "MaxRAM / MaxRAMFraction") \
2012 \
2013 product(uintx, MaxRAMFraction, 4, \
2014 "Maximum fraction (1/n) of real memory used for maximum heap " \
2015 "size") \
2016 \
2017 product(uintx, DefaultMaxRAMFraction, 4, \
2018 "Maximum fraction (1/n) of real memory used for maximum heap " \
2019 "size; deprecated: to be renamed to MaxRAMFraction") \
2020 \
2021 product(uintx, MinRAMFraction, 2, \
2022 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
2023 "size on systems with small physical memory size") \
2024 \
2025 product(uintx, InitialRAMFraction, 64, \
2026 "Fraction (1/n) of real memory used for initial heap size") \
2027 \
2028 develop(uintx, MaxVirtMemFraction, 2, \
2029 "Maximum fraction (1/n) of virtual memory used for ergonomically" \
2030 "determining maximum heap size") \
2031 \
2032 product(bool, UseAutoGCSelectPolicy, false, \
2033 "Use automatic collection selection policy") \
2034 \
2035 product(uintx, AutoGCSelectPauseMillis, 5000, \
2036 "Automatic GC selection pause threshhold in ms") \
2037 \
2038 product(bool, UseAdaptiveSizePolicy, true, \
2039 "Use adaptive generation sizing policies") \
2040 \
2041 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2042 "Use adaptive survivor sizing policies") \
2043 \
2044 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2045 "Use adaptive young-old sizing policies at minor collections") \
2046 \
2047 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2048 "Use adaptive young-old sizing policies at major collections") \
2049 \
2050 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2051 "Use statistics from System.GC for adaptive size policy") \
2052 \
2053 product(bool, UseAdaptiveGCBoundary, false, \
2054 "Allow young-old boundary to move") \
2055 \
2056 develop(bool, TraceAdaptiveGCBoundary, false, \
2057 "Trace young-old boundary moves") \
2058 \
2059 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2060 "Resize the virtual spaces of the young or old generations") \
2061 \
2062 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2063 "Policy for changeing generation size for throughput goals") \
2064 \
2065 product(uintx, AdaptiveSizePausePolicy, 0, \
2066 "Policy for changing generation size for pause goals") \
2067 \
2068 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2069 "Adjust tenured generation to achive a minor pause goal") \
2070 \
2071 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2072 "Adjust young generation to achive a major pause goal") \
2073 \
2074 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2075 "Number of steps where heuristics is used before data is used") \
2076 \
2077 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2078 "Number of collections before the adaptive sizing is started") \
2079 \
2080 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2081 "Collection interval for printing information; zero means never") \
2082 \
2083 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2084 "Use adaptive minimum footprint as a goal") \
2085 \
2086 product(uintx, AdaptiveSizePolicyWeight, 10, \
2087 "Weight given to exponential resizing, between 0 and 100") \
2088 \
2089 product(uintx, AdaptiveTimeWeight, 25, \
2090 "Weight given to time in adaptive policy, between 0 and 100") \
2091 \
2092 product(uintx, PausePadding, 1, \
2093 "How much buffer to keep for pause time") \
2094 \
2095 product(uintx, PromotedPadding, 3, \
2096 "How much buffer to keep for promotion failure") \
2097 \
2098 product(uintx, SurvivorPadding, 3, \
2099 "How much buffer to keep for survivor overflow") \
2100 \
2101 product(uintx, ThresholdTolerance, 10, \
2102 "Allowed collection cost difference between generations") \
2103 \
2104 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2105 "If collection costs are within margin, reduce both by full " \
2106 "delta") \
2107 \
2108 product(uintx, YoungGenerationSizeIncrement, 20, \
2109 "Adaptive size percentage change in young generation") \
2110 \
2111 product(uintx, YoungGenerationSizeSupplement, 80, \
2112 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2113 \
2114 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2115 "Decay factor to YoungedGenerationSizeSupplement") \
2116 \
2117 product(uintx, TenuredGenerationSizeIncrement, 20, \
2118 "Adaptive size percentage change in tenured generation") \
2119 \
2120 product(uintx, TenuredGenerationSizeSupplement, 80, \
2121 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2122 \
2123 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2124 "Decay factor to TenuredGenerationSizeIncrement") \
2125 \
2126 product(uintx, MaxGCPauseMillis, max_uintx, \
2127 "Adaptive size policy maximum GC pause time goal in msec, " \
2128 "or (G1 Only) the max. GC time per MMU time slice") \
2129 \
2130 product(uintx, GCPauseIntervalMillis, 0, \
2131 "Time slice for MMU specification") \
2132 \
2133 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2134 "Adaptive size policy maximum GC minor pause time goal in msec") \
2135 \
2136 product(uintx, GCTimeRatio, 99, \
2137 "Adaptive size policy application time to GC time ratio") \
2138 \
2139 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2140 "Adaptive size scale down factor for shrinking") \
2141 \
2142 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2143 "Adaptive size decays the major cost for long major intervals") \
2144 \
2145 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2146 "Time scale over which major costs decay") \
2147 \
2148 product(uintx, MinSurvivorRatio, 3, \
2149 "Minimum ratio of young generation/survivor space size") \
2150 \
2151 product(uintx, InitialSurvivorRatio, 8, \
2152 "Initial ratio of eden/survivor space size") \
2153 \
2154 product(uintx, BaseFootPrintEstimate, 256*M, \
2155 "Estimate of footprint other than Java Heap") \
2156 \
2157 product(bool, UseGCOverheadLimit, true, \
2158 "Use policy to limit of proportion of time spent in GC " \
2159 "before an OutOfMemory error is thrown") \
2160 \
2161 product(uintx, GCTimeLimit, 98, \
2162 "Limit of proportion of time spent in GC before an OutOfMemory" \
2163 "error is thrown (used with GCHeapFreeLimit)") \
2164 \
2165 product(uintx, GCHeapFreeLimit, 2, \
2166 "Minimum percentage of free space after a full GC before an " \
2167 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2168 \
2169 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2170 "Number of consecutive collections before gc time limit fires") \
2171 \
2172 product(bool, PrintAdaptiveSizePolicy, false, \
2173 "Print information about AdaptiveSizePolicy") \
2174 \
2175 product(intx, PrefetchCopyIntervalInBytes, -1, \
2176 "How far ahead to prefetch destination area (<= 0 means off)") \
2177 \
2178 product(intx, PrefetchScanIntervalInBytes, -1, \
2179 "How far ahead to prefetch scan area (<= 0 means off)") \
2180 \
2181 product(intx, PrefetchFieldsAhead, -1, \
2182 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2183 \
2184 diagnostic(bool, VerifySilently, false, \
2185 "Don't print print the verification progress") \
2186 \
2187 diagnostic(bool, VerifyDuringStartup, false, \
2188 "Verify memory system before executing any Java code " \
2189 "during VM initialization") \
2190 \
2191 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2192 "Verify system before exiting") \
2193 \
2194 diagnostic(bool, VerifyBeforeGC, false, \
2195 "Verify memory system before GC") \
2196 \
2197 diagnostic(bool, VerifyAfterGC, false, \
2198 "Verify memory system after GC") \
2199 \
2200 diagnostic(bool, VerifyDuringGC, false, \
2201 "Verify memory system during GC (between phases)") \
2202 \
2203 diagnostic(bool, GCParallelVerificationEnabled, true, \
2204 "Enable parallel memory system verification") \
2205 \
2206 diagnostic(bool, DeferInitialCardMark, false, \
2207 "When +ReduceInitialCardMarks, explicitly defer any that " \
2208 "may arise from new_pre_store_barrier") \
2209 \
2210 diagnostic(bool, VerifyRememberedSets, false, \
2211 "Verify GC remembered sets") \
2212 \
2213 diagnostic(bool, VerifyObjectStartArray, true, \
2214 "Verify GC object start array if verify before/after") \
2215 \
2216 product(bool, DisableExplicitGC, false, \
2217 "Tells whether calling System.gc() does a full GC") \
2218 \
2219 notproduct(bool, CheckMemoryInitialization, false, \
2220 "Checks memory initialization") \
2221 \
2222 product(bool, CollectGen0First, false, \
2223 "Collect youngest generation before each full GC") \
2224 \
2225 diagnostic(bool, BindCMSThreadToCPU, false, \
2226 "Bind CMS Thread to CPU if possible") \
2227 \
2228 diagnostic(uintx, CPUForCMSThread, 0, \
2229 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2230 \
2231 product(bool, BindGCTaskThreadsToCPUs, false, \
2232 "Bind GCTaskThreads to CPUs if possible") \
2233 \
2234 product(bool, UseGCTaskAffinity, false, \
2235 "Use worker affinity when asking for GCTasks") \
2236 \
2237 product(uintx, ProcessDistributionStride, 4, \
2238 "Stride through processors when distributing processes") \
2239 \
2240 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2241 "number of times the coordinator GC thread will sleep while " \
2242 "yielding before giving up and resuming GC") \
2243 \
2244 product(uintx, CMSYieldSleepCount, 0, \
2245 "number of times a GC thread (minus the coordinator) " \
2246 "will sleep while yielding before giving up and resuming GC") \
2247 \
2248 /* gc tracing */ \
2249 manageable(bool, PrintGC, false, \
2250 "Print message at garbage collect") \
2251 \
2252 manageable(bool, PrintGCDetails, false, \
2253 "Print more details at garbage collect") \
2254 \
2255 manageable(bool, PrintGCDateStamps, false, \
2256 "Print date stamps at garbage collect") \
2257 \
2258 manageable(bool, PrintGCTimeStamps, false, \
2259 "Print timestamps at garbage collect") \
2260 \
2261 product(bool, PrintGCTaskTimeStamps, false, \
2262 "Print timestamps for individual gc worker thread tasks") \
2263 \
2264 develop(intx, ConcGCYieldTimeout, 0, \
2265 "If non-zero, assert that GC threads yield within this # of ms.") \
2266 \
2267 notproduct(bool, TraceMarkSweep, false, \
2268 "Trace mark sweep") \
2269 \
2270 product(bool, PrintReferenceGC, false, \
2271 "Print times spent handling reference objects during GC " \
2272 " (enabled only when PrintGCDetails)") \
2273 \
2274 develop(bool, TraceReferenceGC, false, \
2275 "Trace handling of soft/weak/final/phantom references") \
2276 \
2277 develop(bool, TraceFinalizerRegistration, false, \
2278 "Trace registration of final references") \
2279 \
2280 notproduct(bool, TraceScavenge, false, \
2281 "Trace scavenge") \
2282 \
2283 product_rw(bool, TraceClassLoading, false, \
2284 "Trace all classes loaded") \
2285 \
2286 product(bool, TraceClassLoadingPreorder, false, \
2287 "Trace all classes loaded in order referenced (not loaded)") \
2288 \
2289 product_rw(bool, TraceClassUnloading, false, \
2290 "Trace unloading of classes") \
2291 \
2292 product_rw(bool, TraceLoaderConstraints, false, \
2293 "Trace loader constraints") \
2294 \
2295 develop(bool, TraceClassLoaderData, false, \
2296 "Trace class loader loader_data lifetime") \
2297 \
2298 product(uintx, InitialBootClassLoaderMetaspaceSize, \
2299 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2300 "Initial size of the boot class loader data metaspace") \
2301 \
2302 product(bool, TraceGen0Time, false, \
2303 "Trace accumulated time for Gen 0 collection") \
2304 \
2305 product(bool, TraceGen1Time, false, \
2306 "Trace accumulated time for Gen 1 collection") \
2307 \
2308 product(bool, PrintTenuringDistribution, false, \
2309 "Print tenuring age information") \
2310 \
2311 product_rw(bool, PrintHeapAtGC, false, \
2312 "Print heap layout before and after each GC") \
2313 \
2314 product_rw(bool, PrintHeapAtGCExtended, false, \
2315 "Prints extended information about the layout of the heap " \
2316 "when -XX:+PrintHeapAtGC is set") \
2317 \
2318 product(bool, PrintHeapAtSIGBREAK, true, \
2319 "Print heap layout in response to SIGBREAK") \
2320 \
2321 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2322 "Print a class histogram before any major stop-world GC") \
2323 \
2324 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2325 "Print a class histogram after any major stop-world GC") \
2326 \
2327 manageable(bool, PrintClassHistogram, false, \
2328 "Print a histogram of class instances") \
2329 \
2330 develop(bool, TraceWorkGang, false, \
2331 "Trace activities of work gangs") \
2332 \
2333 product(bool, TraceParallelOldGCTasks, false, \
2334 "Trace multithreaded GC activity") \
2335 \
2336 develop(bool, TraceBlockOffsetTable, false, \
2337 "Print BlockOffsetTable maps") \
2338 \
2339 develop(bool, TraceCardTableModRefBS, false, \
2340 "Print CardTableModRefBS maps") \
2341 \
2342 develop(bool, TraceGCTaskManager, false, \
2343 "Trace actions of the GC task manager") \
2344 \
2345 develop(bool, TraceGCTaskQueue, false, \
2346 "Trace actions of the GC task queues") \
2347 \
2348 diagnostic(bool, TraceGCTaskThread, false, \
2349 "Trace actions of the GC task threads") \
2350 \
2351 product(bool, PrintParallelOldGCPhaseTimes, false, \
2352 "Print the time taken by each parallel old gc phase." \
2353 "PrintGCDetails must also be enabled.") \
2354 \
2355 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2356 "Trace parallel old gc marking phase") \
2357 \
2358 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2359 "Trace parallel old gc summary phase") \
2360 \
2361 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2362 "Trace parallel old gc compaction phase") \
2363 \
2364 develop(bool, TraceParallelOldGCDensePrefix, false, \
2365 "Trace parallel old gc dense prefix computation") \
2366 \
2367 develop(bool, IgnoreLibthreadGPFault, false, \
2368 "Suppress workaround for libthread GP fault") \
2369 \
2370 product(bool, PrintJNIGCStalls, false, \
2371 "Print diagnostic message when GC is stalled" \
2372 "by JNI critical section") \
2373 \
2374 experimental(double, ObjectCountCutOffPercent, 0.5, \
2375 "The percentage of the used heap that the instances of a class " \
2376 "must occupy for the class to generate a trace event.") \
2377 \
2378 /* GC log rotation setting */ \
2379 \
2380 product(bool, UseGCLogFileRotation, false, \
2381 "Prevent large gclog file for long running app. " \
2382 "Requires -Xloggc:<filename>") \
2383 \
2384 product(uintx, NumberOfGCLogFiles, 0, \
2385 "Number of gclog files in rotation, " \
2386 "Default: 0, no rotation") \
2387 \
2388 product(uintx, GCLogFileSize, 0, \
2389 "GC log file size, Default: 0 bytes, no rotation " \
2390 "Only valid with UseGCLogFileRotation") \
2391 \
2392 /* JVMTI heap profiling */ \
2393 \
2394 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2395 "Trace JVMTI object tagging calls") \
2396 \
2397 diagnostic(bool, VerifyBeforeIteration, false, \
2398 "Verify memory system before JVMTI iteration") \
2399 \
2400 /* compiler interface */ \
2401 \
2402 develop(bool, CIPrintCompilerName, false, \
2403 "when CIPrint is active, print the name of the active compiler") \
2404 \
2405 develop(bool, CIPrintCompileQueue, false, \
2406 "display the contents of the compile queue whenever a " \
2407 "compilation is enqueued") \
2408 \
2409 develop(bool, CIPrintRequests, false, \
2410 "display every request for compilation") \
2411 \
2412 product(bool, CITime, false, \
2413 "collect timing information for compilation") \
2414 \
2415 develop(bool, CITimeEach, false, \
2416 "display timing information after each successful compilation") \
2417 \
2418 develop(bool, CICountOSR, false, \
2419 "use a separate counter when assigning ids to osr compilations") \
2420 \
2421 develop(bool, CICompileNatives, true, \
2422 "compile native methods if supported by the compiler") \
2423 \
2424 develop_pd(bool, CICompileOSR, \
2425 "compile on stack replacement methods if supported by the " \
2426 "compiler") \
2427 \
2428 develop(bool, CIPrintMethodCodes, false, \
2429 "print method bytecodes of the compiled code") \
2430 \
2431 develop(bool, CIPrintTypeFlow, false, \
2432 "print the results of ciTypeFlow analysis") \
2433 \
2434 develop(bool, CITraceTypeFlow, false, \
2435 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2436 \
2437 develop(intx, OSROnlyBCI, -1, \
2438 "OSR only at this bci. Negative values mean exclude that bci") \
2439 \
2440 /* compiler */ \
2441 \
2442 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2443 "Number of compiler threads to run") \
2444 \
2445 product(intx, CompilationPolicyChoice, 0, \
2446 "which compilation policy (0/1)") \
2447 \
2448 develop(bool, UseStackBanging, true, \
2449 "use stack banging for stack overflow checks (required for " \
2450 "proper StackOverflow handling; disable only to measure cost " \
2451 "of stackbanging)") \
2452 \
2453 develop(bool, UseStrictFP, true, \
2454 "use strict fp if modifier strictfp is set") \
2455 \
2456 develop(bool, GenerateSynchronizationCode, true, \
2457 "generate locking/unlocking code for synchronized methods and " \
2458 "monitors") \
2459 \
2460 develop(bool, GenerateCompilerNullChecks, true, \
2461 "Generate explicit null checks for loads/stores/calls") \
2462 \
2463 develop(bool, GenerateRangeChecks, true, \
2464 "Generate range checks for array accesses") \
2465 \
2466 develop_pd(bool, ImplicitNullChecks, \
2467 "generate code for implicit null checks") \
2468 \
2469 product(bool, PrintSafepointStatistics, false, \
2470 "print statistics about safepoint synchronization") \
2471 \
2472 product(intx, PrintSafepointStatisticsCount, 300, \
2473 "total number of safepoint statistics collected " \
2474 "before printing them out") \
2475 \
2476 product(intx, PrintSafepointStatisticsTimeout, -1, \
2477 "print safepoint statistics only when safepoint takes" \
2478 " more than PrintSafepointSatisticsTimeout in millis") \
2479 \
2480 product(bool, TraceSafepointCleanupTime, false, \
2481 "print the break down of clean up tasks performed during" \
2482 " safepoint") \
2483 \
2484 product(bool, Inline, true, \
2485 "enable inlining") \
2486 \
2487 product(bool, ClipInlining, true, \
2488 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2489 \
2490 develop(bool, UseCHA, true, \
2491 "enable CHA") \
2492 \
2493 product(bool, UseTypeProfile, true, \
2494 "Check interpreter profile for historically monomorphic calls") \
2495 \
2496 notproduct(bool, TimeCompiler, false, \
2497 "time the compiler") \
2498 \
2499 diagnostic(bool, PrintInlining, false, \
2500 "prints inlining optimizations") \
2501 \
2502 product(bool, UsePopCountInstruction, false, \
2503 "Use population count instruction") \
2504 \
2505 develop(bool, EagerInitialization, false, \
2506 "Eagerly initialize classes if possible") \
2507 \
2508 develop(bool, TraceMethodReplacement, false, \
2509 "Print when methods are replaced do to recompilation") \
2510 \
2511 develop(bool, PrintMethodFlushing, false, \
2512 "print the nmethods being flushed") \
2513 \
2514 develop(bool, UseRelocIndex, false, \
2515 "use an index to speed random access to relocations") \
2516 \
2517 develop(bool, StressCodeBuffers, false, \
2518 "Exercise code buffer expansion and other rare state changes") \
2519 \
2520 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2521 "Generate extra debugging info for non-safepoints in nmethods") \
2522 \
2523 product(bool, PrintVMOptions, false, \
2524 "Print flags that appeared on the command line") \
2525 \
2526 product(bool, IgnoreUnrecognizedVMOptions, false, \
2527 "Ignore unrecognized VM options") \
2528 \
2529 product(bool, PrintCommandLineFlags, false, \
2530 "Print flags specified on command line or set by ergonomics") \
2531 \
2532 product(bool, PrintFlagsInitial, false, \
2533 "Print all VM flags before argument processing and exit VM") \
2534 \
2535 product(bool, PrintFlagsFinal, false, \
2536 "Print all VM flags after argument and ergonomic processing") \
2537 \
2538 notproduct(bool, PrintFlagsWithComments, false, \
2539 "Print all VM flags with default values and descriptions and exit")\
2540 \
2541 diagnostic(bool, SerializeVMOutput, true, \
2542 "Use a mutex to serialize output to tty and LogFile") \
2543 \
2544 diagnostic(bool, DisplayVMOutput, true, \
2545 "Display all VM output on the tty, independently of LogVMOutput") \
2546 \
2547 diagnostic(bool, LogVMOutput, false, \
2548 "Save VM output to LogFile") \
2549 \
2550 diagnostic(ccstr, LogFile, NULL, \
2551 "If LogVMOutput or LogCompilation is on, save VM output to " \
2552 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)") \
2553 \
2554 product(ccstr, ErrorFile, NULL, \
2555 "If an error occurs, save the error data to this file " \
2556 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2557 \
2558 product(bool, DisplayVMOutputToStderr, false, \
2559 "If DisplayVMOutput is true, display all VM output to stderr") \
2560 \
2561 product(bool, DisplayVMOutputToStdout, false, \
2562 "If DisplayVMOutput is true, display all VM output to stdout") \
2563 \
2564 product(bool, UseHeavyMonitors, false, \
2565 "use heavyweight instead of lightweight Java monitors") \
2566 \
2567 product(bool, PrintStringTableStatistics, false, \
2568 "print statistics about the StringTable and SymbolTable") \
2569 \
2570 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2571 "print histogram of the symbol table") \
2572 \
2573 notproduct(bool, ExitVMOnVerifyError, false, \
2574 "standard exit from VM if bytecode verify error " \
2575 "(only in debug mode)") \
2576 \
2577 notproduct(ccstr, AbortVMOnException, NULL, \
2578 "Call fatal if this exception is thrown. Example: " \
2579 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2580 \
2581 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2582 "Call fatal if the exception pointed by AbortVMOnException " \
2583 "has this message.") \
2584 \
2585 develop(bool, DebugVtables, false, \
2586 "add debugging code to vtable dispatch") \
2587 \
2588 develop(bool, PrintVtables, false, \
2589 "print vtables when printing klass") \
2590 \
2591 notproduct(bool, PrintVtableStats, false, \
2592 "print vtables stats at end of run") \
2593 \
2594 develop(bool, TraceCreateZombies, false, \
2595 "trace creation of zombie nmethods") \
2596 \
2597 notproduct(bool, IgnoreLockingAssertions, false, \
2598 "disable locking assertions (for speed)") \
2599 \
2600 product(bool, RangeCheckElimination, true, \
2601 "Eliminate range checks") \
2602 \
2603 develop_pd(bool, UncommonNullCast, \
2604 "track occurrences of null in casts; adjust compiler tactics") \
2605 \
2606 develop(bool, TypeProfileCasts, true, \
2607 "treat casts like calls for purposes of type profiling") \
2608 \
2609 develop(bool, DelayCompilationDuringStartup, true, \
2610 "Delay invoking the compiler until main application class is " \
2611 "loaded") \
2612 \
2613 develop(bool, CompileTheWorld, false, \
2614 "Compile all methods in all classes in bootstrap class path " \
2615 "(stress test)") \
2616 \
2617 develop(bool, CompileTheWorldPreloadClasses, true, \
2618 "Preload all classes used by a class before start loading") \
2619 \
2620 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2621 "Force a safepoint every n compiles so sweeper can keep up") \
2622 \
2623 develop(bool, FillDelaySlots, true, \
2624 "Fill delay slots (on SPARC only)") \
2625 \
2626 develop(bool, TimeLivenessAnalysis, false, \
2627 "Time computation of bytecode liveness analysis") \
2628 \
2629 develop(bool, TraceLivenessGen, false, \
2630 "Trace the generation of liveness analysis information") \
2631 \
2632 notproduct(bool, TraceLivenessQuery, false, \
2633 "Trace queries of liveness analysis information") \
2634 \
2635 notproduct(bool, CollectIndexSetStatistics, false, \
2636 "Collect information about IndexSets") \
2637 \
2638 develop(bool, UseLoopSafepoints, true, \
2639 "Generate Safepoint nodes in every loop") \
2640 \
2641 develop(intx, FastAllocateSizeLimit, 128*K, \
2642 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2643 "Inline allocations larger than this in doublewords must go slow")\
2644 \
2645 product(bool, AggressiveOpts, false, \
2646 "Enable aggressive optimizations - see arguments.cpp") \
2647 \
2648 /* statistics */ \
2649 develop(bool, CountCompiledCalls, false, \
2650 "counts method invocations") \
2651 \
2652 notproduct(bool, CountRuntimeCalls, false, \
2653 "counts VM runtime calls") \
2654 \
2655 develop(bool, CountJNICalls, false, \
2656 "counts jni method invocations") \
2657 \
2658 notproduct(bool, CountJVMCalls, false, \
2659 "counts jvm method invocations") \
2660 \
2661 notproduct(bool, CountRemovableExceptions, false, \
2662 "count exceptions that could be replaced by branches due to " \
2663 "inlining") \
2664 \
2665 notproduct(bool, ICMissHistogram, false, \
2666 "produce histogram of IC misses") \
2667 \
2668 notproduct(bool, PrintClassStatistics, false, \
2669 "prints class statistics at end of run") \
2670 \
2671 notproduct(bool, PrintMethodStatistics, false, \
2672 "prints method statistics at end of run") \
2673 \
2674 /* interpreter */ \
2675 develop(bool, ClearInterpreterLocals, false, \
2676 "Always clear local variables of interpreter activations upon " \
2677 "entry") \
2678 \
2679 product_pd(bool, RewriteBytecodes, \
2680 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2681 \
2682 product_pd(bool, RewriteFrequentPairs, \
2683 "Rewrite frequently used bytecode pairs into a single bytecode") \
2684 \
2685 diagnostic(bool, PrintInterpreter, false, \
2686 "Prints the generated interpreter code") \
2687 \
2688 product(bool, UseInterpreter, true, \
2689 "Use interpreter for non-compiled methods") \
2690 \
2691 develop(bool, UseFastSignatureHandlers, true, \
2692 "Use fast signature handlers for native calls") \
2693 \
2694 product(bool, UseLoopCounter, true, \
2695 "Increment invocation counter on backward branch") \
2696 \
2697 product(bool, UseFastEmptyMethods, true, \
2698 "Use fast method entry code for empty methods") \
2699 \
2700 product(bool, UseFastAccessorMethods, true, \
2701 "Use fast method entry code for accessor methods") \
2702 \
2703 product_pd(bool, UseOnStackReplacement, \
2704 "Use on stack replacement, calls runtime if invoc. counter " \
2705 "overflows in loop") \
2706 \
2707 notproduct(bool, TraceOnStackReplacement, false, \
2708 "Trace on stack replacement") \
2709 \
2710 product_pd(bool, PreferInterpreterNativeStubs, \
2711 "Use always interpreter stubs for native methods invoked via " \
2712 "interpreter") \
2713 \
2714 develop(bool, CountBytecodes, false, \
2715 "Count number of bytecodes executed") \
2716 \
2717 develop(bool, PrintBytecodeHistogram, false, \
2718 "Print histogram of the executed bytecodes") \
2719 \
2720 develop(bool, PrintBytecodePairHistogram, false, \
2721 "Print histogram of the executed bytecode pairs") \
2722 \
2723 diagnostic(bool, PrintSignatureHandlers, false, \
2724 "Print code generated for native method signature handlers") \
2725 \
2726 develop(bool, VerifyOops, false, \
2727 "Do plausibility checks for oops") \
2728 \
2729 develop(bool, CheckUnhandledOops, false, \
2730 "Check for unhandled oops in VM code") \
2731 \
2732 develop(bool, VerifyJNIFields, trueInDebug, \
2733 "Verify jfieldIDs for instance fields") \
2734 \
2735 notproduct(bool, VerifyJNIEnvThread, false, \
2736 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2737 "from JNI") \
2738 \
2739 develop(bool, VerifyFPU, false, \
2740 "Verify FPU state (check for NaN's, etc.)") \
2741 \
2742 develop(bool, VerifyThread, false, \
2743 "Watch the thread register for corruption (SPARC only)") \
2744 \
2745 develop(bool, VerifyActivationFrameSize, false, \
2746 "Verify that activation frame didn't become smaller than its " \
2747 "minimal size") \
2748 \
2749 develop(bool, TraceFrequencyInlining, false, \
2750 "Trace frequency based inlining") \
2751 \
2752 develop_pd(bool, InlineIntrinsics, \
2753 "Inline intrinsics that can be statically resolved") \
2754 \
2755 product_pd(bool, ProfileInterpreter, \
2756 "Profile at the bytecode level during interpretation") \
2757 \
2758 develop_pd(bool, ProfileTraps, \
2759 "Profile deoptimization traps at the bytecode level") \
2760 \
2761 product(intx, ProfileMaturityPercentage, 20, \
2762 "number of method invocations/branches (expressed as % of " \
2763 "CompileThreshold) before using the method's profile") \
2764 \
2765 develop(bool, PrintMethodData, false, \
2766 "Print the results of +ProfileInterpreter at end of run") \
2767 \
2768 develop(bool, VerifyDataPointer, trueInDebug, \
2769 "Verify the method data pointer during interpreter profiling") \
2770 \
2771 develop(bool, VerifyCompiledCode, false, \
2772 "Include miscellaneous runtime verifications in nmethod code; " \
2773 "default off because it disturbs nmethod size heuristics") \
2774 \
2775 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2776 "Manually make GC thread crash then dump java stack trace; " \
2777 "Test only") \
2778 \
2779 /* compilation */ \
2780 product(bool, UseCompiler, true, \
2781 "use compilation") \
2782 \
2783 develop(bool, TraceCompilationPolicy, false, \
2784 "Trace compilation policy") \
2785 \
2786 develop(bool, TimeCompilationPolicy, false, \
2787 "Time the compilation policy") \
2788 \
2789 product(bool, UseCounterDecay, true, \
2790 "adjust recompilation counters") \
2791 \
2792 develop(intx, CounterHalfLifeTime, 30, \
2793 "half-life time of invocation counters (in secs)") \
2794 \
2795 develop(intx, CounterDecayMinIntervalLength, 500, \
2796 "Min. ms. between invocation of CounterDecay") \
2797 \
2798 product(bool, AlwaysCompileLoopMethods, false, \
2799 "when using recompilation, never interpret methods " \
2800 "containing loops") \
2801 \
2802 product(bool, DontCompileHugeMethods, true, \
2803 "don't compile methods > HugeMethodLimit") \
2804 \
2805 /* Bytecode escape analysis estimation. */ \
2806 product(bool, EstimateArgEscape, true, \
2807 "Analyze bytecodes to estimate escape state of arguments") \
2808 \
2809 product(intx, BCEATraceLevel, 0, \
2810 "How much tracing to do of bytecode escape analysis estimates") \
2811 \
2812 product(intx, MaxBCEAEstimateLevel, 5, \
2813 "Maximum number of nested calls that are analyzed by BC EA.") \
2814 \
2815 product(intx, MaxBCEAEstimateSize, 150, \
2816 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2817 \
2818 product(intx, AllocatePrefetchStyle, 1, \
2819 "0 = no prefetch, " \
2820 "1 = prefetch instructions for each allocation, " \
2821 "2 = use TLAB watermark to gate allocation prefetch, " \
2822 "3 = use BIS instruction on Sparc for allocation prefetch") \
2823 \
2824 product(intx, AllocatePrefetchDistance, -1, \
2825 "Distance to prefetch ahead of allocation pointer") \
2826 \
2827 product(intx, AllocatePrefetchLines, 3, \
2828 "Number of lines to prefetch ahead of array allocation pointer") \
2829 \
2830 product(intx, AllocateInstancePrefetchLines, 1, \
2831 "Number of lines to prefetch ahead of instance allocation pointer") \
2832 \
2833 product(intx, AllocatePrefetchStepSize, 16, \
2834 "Step size in bytes of sequential prefetch instructions") \
2835 \
2836 product(intx, AllocatePrefetchInstr, 0, \
2837 "Prefetch instruction to prefetch ahead of allocation pointer") \
2838 \
2839 /* deoptimization */ \
2840 develop(bool, TraceDeoptimization, false, \
2841 "Trace deoptimization") \
2842 \
2843 develop(bool, DebugDeoptimization, false, \
2844 "Tracing various information while debugging deoptimization") \
2845 \
2846 product(intx, SelfDestructTimer, 0, \
2847 "Will cause VM to terminate after a given time (in minutes) " \
2848 "(0 means off)") \
2849 \
2850 product(intx, MaxJavaStackTraceDepth, 1024, \
2851 "Max. no. of lines in the stack trace for Java exceptions " \
2852 "(0 means all)") \
2853 \
2854 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
2855 "Guarantee a safepoint (at least) every so many milliseconds " \
2856 "(0 means none)")) \
2857 \
2858 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
2859 "Guarantee a safepoint (at least) every so many milliseconds " \
2860 "(0 means none)")) \
2861 \
2862 product(intx, SafepointTimeoutDelay, 10000, \
2863 "Delay in milliseconds for option SafepointTimeout") \
2864 \
2865 product(intx, NmethodSweepFraction, 16, \
2866 "Number of invocations of sweeper to cover all nmethods") \
2867 \
2868 product(intx, NmethodSweepCheckInterval, 5, \
2869 "Compilers wake up every n seconds to possibly sweep nmethods") \
2870 \
2871 notproduct(bool, LogSweeper, false, \
2872 "Keep a ring buffer of sweeper activity") \
2873 \
2874 notproduct(intx, SweeperLogEntries, 1024, \
2875 "Number of records in the ring buffer of sweeper activity") \
2876 \
2877 notproduct(intx, MemProfilingInterval, 500, \
2878 "Time between each invocation of the MemProfiler") \
2879 \
2880 develop(intx, MallocCatchPtr, -1, \
2881 "Hit breakpoint when mallocing/freeing this pointer") \
2882 \
2883 notproduct(intx, AssertRepeat, 1, \
2884 "number of times to evaluate expression in assert " \
2885 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2886 \
2887 notproduct(ccstrlist, SuppressErrorAt, "", \
2888 "List of assertions (file:line) to muzzle") \
2889 \
2890 notproduct(uintx, HandleAllocationLimit, 1024, \
2891 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2892 "is used") \
2893 \
2894 develop(uintx, TotalHandleAllocationLimit, 1024, \
2895 "Threshold for total handle allocation when " \
2896 "+TraceHandleAllocation is used") \
2897 \
2898 develop(intx, StackPrintLimit, 100, \
2899 "number of stack frames to print in VM-level stack dump") \
2900 \
2901 notproduct(intx, MaxElementPrintSize, 256, \
2902 "maximum number of elements to print") \
2903 \
2904 notproduct(intx, MaxSubklassPrintSize, 4, \
2905 "maximum number of subklasses to print when printing klass") \
2906 \
2907 product(intx, MaxInlineLevel, 9, \
2908 "maximum number of nested calls that are inlined") \
2909 \
2910 product(intx, MaxRecursiveInlineLevel, 1, \
2911 "maximum number of nested recursive calls that are inlined") \
2912 \
2913 product_pd(intx, InlineSmallCode, \
2914 "Only inline already compiled methods if their code size is " \
2915 "less than this") \
2916 \
2917 product(intx, MaxInlineSize, 35, \
2918 "maximum bytecode size of a method to be inlined") \
2919 \
2920 product_pd(intx, FreqInlineSize, \
2921 "maximum bytecode size of a frequent method to be inlined") \
2922 \
2923 product(intx, MaxTrivialSize, 6, \
2924 "maximum bytecode size of a trivial method to be inlined") \
2925 \
2926 product(intx, MinInliningThreshold, 250, \
2927 "min. invocation count a method needs to have to be inlined") \
2928 \
2929 develop(intx, MethodHistogramCutoff, 100, \
2930 "cutoff value for method invoc. histogram (+CountCalls)") \
2931 \
2932 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
2933 "# of interpreted methods to show in profile") \
2934 \
2935 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
2936 "# of compiled methods to show in profile") \
2937 \
2938 develop(intx, ProfilerNumberOfStubMethods, 25, \
2939 "# of stub methods to show in profile") \
2940 \
2941 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
2942 "# of runtime stub nodes to show in profile") \
2943 \
2944 product(intx, ProfileIntervalsTicks, 100, \
2945 "# of ticks between printing of interval profile " \
2946 "(+ProfileIntervals)") \
2947 \
2948 notproduct(intx, ScavengeALotInterval, 1, \
2949 "Interval between which scavenge will occur with +ScavengeALot") \
2950 \
2951 notproduct(intx, FullGCALotInterval, 1, \
2952 "Interval between which full gc will occur with +FullGCALot") \
2953 \
2954 notproduct(intx, FullGCALotStart, 0, \
2955 "For which invocation to start FullGCAlot") \
2956 \
2957 notproduct(intx, FullGCALotDummies, 32*K, \
2958 "Dummy object allocated with +FullGCALot, forcing all objects " \
2959 "to move") \
2960 \
2961 develop(intx, DontYieldALotInterval, 10, \
2962 "Interval between which yields will be dropped (milliseconds)") \
2963 \
2964 develop(intx, MinSleepInterval, 1, \
2965 "Minimum sleep() interval (milliseconds) when " \
2966 "ConvertSleepToYield is off (used for SOLARIS)") \
2967 \
2968 develop(intx, ProfilerPCTickThreshold, 15, \
2969 "Number of ticks in a PC buckets to be a hotspot") \
2970 \
2971 notproduct(intx, DeoptimizeALotInterval, 5, \
2972 "Number of exits until DeoptimizeALot kicks in") \
2973 \
2974 notproduct(intx, ZombieALotInterval, 5, \
2975 "Number of exits until ZombieALot kicks in") \
2976 \
2977 develop(bool, StressNonEntrant, false, \
2978 "Mark nmethods non-entrant at registration") \
2979 \
2980 diagnostic(intx, MallocVerifyInterval, 0, \
2981 "if non-zero, verify C heap after every N calls to " \
2982 "malloc/realloc/free") \
2983 \
2984 diagnostic(intx, MallocVerifyStart, 0, \
2985 "if non-zero, start verifying C heap after Nth call to " \
2986 "malloc/realloc/free") \
2987 \
2988 diagnostic(uintx, MallocMaxTestWords, 0, \
2989 "if non-zero, max # of Words that malloc/realloc can allocate " \
2990 "(for testing only)") \
2991 \
2992 product(intx, TypeProfileWidth, 2, \
2993 "number of receiver types to record in call/cast profile") \
2994 \
2995 develop(intx, BciProfileWidth, 2, \
2996 "number of return bci's to record in ret profile") \
2997 \
2998 product(intx, PerMethodRecompilationCutoff, 400, \
2999 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
3000 \
3001 product(intx, PerBytecodeRecompilationCutoff, 200, \
3002 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
3003 \
3004 product(intx, PerMethodTrapLimit, 100, \
3005 "Limit on traps (of one kind) in a method (includes inlines)") \
3006 \
3007 product(intx, PerBytecodeTrapLimit, 4, \
3008 "Limit on traps (of one kind) at a particular BCI") \
3009 \
3010 develop(intx, InlineFrequencyRatio, 20, \
3011 "Ratio of call site execution to caller method invocation") \
3012 \
3013 develop_pd(intx, InlineFrequencyCount, \
3014 "Count of call site execution necessary to trigger frequent " \
3015 "inlining") \
3016 \
3017 develop(intx, InlineThrowCount, 50, \
3018 "Force inlining of interpreted methods that throw this often") \
3019 \
3020 develop(intx, InlineThrowMaxSize, 200, \
3021 "Force inlining of throwing methods smaller than this") \
3022 \
3023 develop(intx, ProfilerNodeSize, 1024, \
3024 "Size in K to allocate for the Profile Nodes of each thread") \
3025 \
3026 product_pd(intx, PreInflateSpin, \
3027 "Number of times to spin wait before inflation") \
3028 \
3029 /* gc parameters */ \
3030 product(uintx, InitialHeapSize, 0, \
3031 "Initial heap size (in bytes); zero means use ergonomics") \
3032 \
3033 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
3034 "Maximum heap size (in bytes)") \
3035 \
3036 product(uintx, OldSize, ScaleForWordSize(4*M), \
3037 "Initial tenured generation size (in bytes)") \
3038 \
3039 product(uintx, NewSize, ScaleForWordSize(1*M), \
3040 "Initial new generation size (in bytes)") \
3041 \
3042 product(uintx, MaxNewSize, max_uintx, \
3043 "Maximum new generation size (in bytes), max_uintx means set " \
3044 "ergonomically") \
3045 \
3046 product(uintx, PretenureSizeThreshold, 0, \
3047 "Maximum size in bytes of objects allocated in DefNew " \
3048 "generation; zero means no maximum") \
3049 \
3050 product(uintx, TLABSize, 0, \
3051 "Starting TLAB size (in bytes); zero means set ergonomically") \
3052 \
3053 product(uintx, MinTLABSize, 2*K, \
3054 "Minimum allowed TLAB size (in bytes)") \
3055 \
3056 product(uintx, TLABAllocationWeight, 35, \
3057 "Allocation averaging weight") \
3058 \
3059 product(uintx, TLABWasteTargetPercent, 1, \
3060 "Percentage of Eden that can be wasted") \
3061 \
3062 product(uintx, TLABRefillWasteFraction, 64, \
3063 "Max TLAB waste at a refill (internal fragmentation)") \
3064 \
3065 product(uintx, TLABWasteIncrement, 4, \
3066 "Increment allowed waste at slow allocation") \
3067 \
3068 product(uintx, SurvivorRatio, 8, \
3069 "Ratio of eden/survivor space size") \
3070 \
3071 product(uintx, NewRatio, 2, \
3072 "Ratio of new/old generation sizes") \
3073 \
3074 product_pd(uintx, NewSizeThreadIncrease, \
3075 "Additional size added to desired new generation size per " \
3076 "non-daemon thread (in bytes)") \
3077 \
3078 product_pd(uintx, MetaspaceSize, \
3079 "Initial size of Metaspaces (in bytes)") \
3080 \
3081 product(uintx, MaxMetaspaceSize, max_uintx, \
3082 "Maximum size of Metaspaces (in bytes)") \
3083 \
3084 product(uintx, CompressedClassSpaceSize, 1*G, \
3085 "Maximum size of class area in Metaspace when compressed " \
3086 "class pointers are used") \
3087 \
3088 product(uintx, MinHeapFreeRatio, 40, \
3089 "Min percentage of heap free after GC to avoid expansion") \
3090 \
3091 product(uintx, MaxHeapFreeRatio, 70, \
3092 "Max percentage of heap free after GC to avoid shrinking") \
3093 \
3094 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3095 "Number of milliseconds per MB of free space in the heap") \
3096 \
3097 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3098 "Min change in heap space due to GC (in bytes)") \
3099 \
3100 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3101 "Min expansion of Metaspace (in bytes)") \
3102 \
3103 product(uintx, MinMetaspaceFreeRatio, 40, \
3104 "Min percentage of Metaspace free after GC to avoid expansion") \
3105 \
3106 product(uintx, MaxMetaspaceFreeRatio, 70, \
3107 "Max percentage of Metaspace free after GC to avoid shrinking") \
3108 \
3109 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3110 "Max expansion of Metaspace without full GC (in bytes)") \
3111 \
3112 product(uintx, QueuedAllocationWarningCount, 0, \
3113 "Number of times an allocation that queues behind a GC " \
3114 "will retry before printing a warning") \
3115 \
3116 diagnostic(uintx, VerifyGCStartAt, 0, \
3117 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3118 \
3119 diagnostic(intx, VerifyGCLevel, 0, \
3120 "Generation level at which to start +VerifyBefore/AfterGC") \
3121 \
3122 product(uintx, MaxTenuringThreshold, 15, \
3123 "Maximum value for tenuring threshold") \
3124 \
3125 product(uintx, InitialTenuringThreshold, 7, \
3126 "Initial value for tenuring threshold") \
3127 \
3128 product(uintx, TargetSurvivorRatio, 50, \
3129 "Desired percentage of survivor space used after scavenge") \
3130 \
3131 product(uintx, MarkSweepDeadRatio, 5, \
3132 "Percentage (0-100) of the old gen allowed as dead wood." \
3133 "Serial mark sweep treats this as both the min and max value." \
3134 "CMS uses this value only if it falls back to mark sweep." \
3135 "Par compact uses a variable scale based on the density of the" \
3136 "generation and treats this as the max value when the heap is" \
3137 "either completely full or completely empty. Par compact also" \
3138 "has a smaller default value; see arguments.cpp.") \
3139 \
3140 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3141 "How often should we fully compact the heap (ignoring the dead " \
3142 "space parameters)") \
3143 \
3144 product(intx, PrintCMSStatistics, 0, \
3145 "Statistics for CMS") \
3146 \
3147 product(bool, PrintCMSInitiationStatistics, false, \
3148 "Statistics for initiating a CMS collection") \
3149 \
3150 product(intx, PrintFLSStatistics, 0, \
3151 "Statistics for CMS' FreeListSpace") \
3152 \
3153 product(intx, PrintFLSCensus, 0, \
3154 "Census for CMS' FreeListSpace") \
3155 \
3156 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3157 "Delay in ms between expansion and allocation") \
3158 \
3159 develop(uintx, GCWorkerDelayMillis, 0, \
3160 "Delay in ms in scheduling GC workers") \
3161 \
3162 product(intx, DeferThrSuspendLoopCount, 4000, \
3163 "(Unstable) Number of times to iterate in safepoint loop " \
3164 " before blocking VM threads ") \
3165 \
3166 product(intx, DeferPollingPageLoopCount, -1, \
3167 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3168 "before changing safepoint polling page to RO ") \
3169 \
3170 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3171 \
3172 product(bool, PSChunkLargeArrays, true, \
3173 "true: process large arrays in chunks") \
3174 \
3175 product(uintx, GCDrainStackTargetSize, 64, \
3176 "how many entries we'll try to leave on the stack during " \
3177 "parallel GC") \
3178 \
3179 /* stack parameters */ \
3180 product_pd(intx, StackYellowPages, \
3181 "Number of yellow zone (recoverable overflows) pages") \
3182 \
3183 product_pd(intx, StackRedPages, \
3184 "Number of red zone (unrecoverable overflows) pages") \
3185 \
3186 product_pd(intx, StackShadowPages, \
3187 "Number of shadow zone (for overflow checking) pages" \
3188 " this should exceed the depth of the VM and native call stack") \
3189 \
3190 product_pd(intx, ThreadStackSize, \
3191 "Thread Stack Size (in Kbytes)") \
3192 \
3193 product_pd(intx, VMThreadStackSize, \
3194 "Non-Java Thread Stack Size (in Kbytes)") \
3195 \
3196 product_pd(intx, CompilerThreadStackSize, \
3197 "Compiler Thread Stack Size (in Kbytes)") \
3198 \
3199 develop_pd(uintx, JVMInvokeMethodSlack, \
3200 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3201 \
3202 product(uintx, ThreadSafetyMargin, 50*M, \
3203 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3204 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3205 "disable this feature") \
3206 \
3207 /* code cache parameters */ \
3208 develop(uintx, CodeCacheSegmentSize, 64, \
3209 "Code cache segment size (in bytes) - smallest unit of " \
3210 "allocation") \
3211 \
3212 develop_pd(intx, CodeEntryAlignment, \
3213 "Code entry alignment for generated code (in bytes)") \
3214 \
3215 product_pd(intx, OptoLoopAlignment, \
3216 "Align inner loops to zero relative to this modulus") \
3217 \
3218 product_pd(uintx, InitialCodeCacheSize, \
3219 "Initial code cache size (in bytes)") \
3220 \
3221 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3222 "Minimum code cache size (in bytes) required to start VM.") \
3223 \
3224 product_pd(uintx, ReservedCodeCacheSize, \
3225 "Reserved code cache size (in bytes) - maximum code cache size") \
3226 \
3227 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3228 "When less than X space left, we stop compiling.") \
3229 \
3230 product_pd(uintx, CodeCacheExpansionSize, \
3231 "Code cache expansion size (in bytes)") \
3232 \
3233 develop_pd(uintx, CodeCacheMinBlockLength, \
3234 "Minimum number of segments in a code cache block.") \
3235 \
3236 notproduct(bool, ExitOnFullCodeCache, false, \
3237 "Exit the VM if we fill the code cache.") \
3238 \
3239 product(bool, UseCodeCacheFlushing, true, \
3240 "Attempt to clean the code cache before shutting off compiler") \
3241 \
3242 product(intx, MinCodeCacheFlushingInterval, 30, \
3243 "Min number of seconds between code cache cleaning sessions") \
3244 \
3245 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \
3246 "When less than X space left, start code cache cleaning") \
3247 \
3248 product(uintx, CodeCacheFlushingFraction, 2, \
3249 "Fraction of the code cache that is flushed when full") \
3250 \
3251 /* interpreter debugging */ \
3252 develop(intx, BinarySwitchThreshold, 5, \
3253 "Minimal number of lookupswitch entries for rewriting to binary " \
3254 "switch") \
3255 \
3256 develop(intx, StopInterpreterAt, 0, \
3257 "Stops interpreter execution at specified bytecode number") \
3258 \
3259 develop(intx, TraceBytecodesAt, 0, \
3260 "Traces bytecodes starting with specified bytecode number") \
3261 \
3262 /* compiler interface */ \
3263 develop(intx, CIStart, 0, \
3264 "the id of the first compilation to permit") \
3265 \
3266 develop(intx, CIStop, -1, \
3267 "the id of the last compilation to permit") \
3268 \
3269 develop(intx, CIStartOSR, 0, \
3270 "the id of the first osr compilation to permit " \
3271 "(CICountOSR must be on)") \
3272 \
3273 develop(intx, CIStopOSR, -1, \
3274 "the id of the last osr compilation to permit " \
3275 "(CICountOSR must be on)") \
3276 \
3277 develop(intx, CIBreakAtOSR, -1, \
3278 "id of osr compilation to break at") \
3279 \
3280 develop(intx, CIBreakAt, -1, \
3281 "id of compilation to break at") \
3282 \
3283 product(ccstrlist, CompileOnly, "", \
3284 "List of methods (pkg/class.name) to restrict compilation to") \
3285 \
3286 product(ccstr, CompileCommandFile, NULL, \
3287 "Read compiler commands from this file [.hotspot_compiler]") \
3288 \
3289 product(ccstrlist, CompileCommand, "", \
3290 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3291 \
3292 develop(bool, ReplayCompiles, false, \
3293 "Enable replay of compilations from ReplayDataFile") \
3294 \
3295 product(ccstr, ReplayDataFile, NULL, \
3296 "File containing compilation replay information" \
3297 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3298 \
3299 develop(intx, ReplaySuppressInitializers, 2, \
3300 "Controls handling of class initialization during replay" \
3301 "0 - don't do anything special" \
3302 "1 - treat all class initializers as empty" \
3303 "2 - treat class initializers for application classes as empty" \
3304 "3 - allow all class initializers to run during bootstrap but" \
3305 " pretend they are empty after starting replay") \
3306 \
3307 develop(bool, ReplayIgnoreInitErrors, false, \
3308 "Ignore exceptions thrown during initialization for replay") \
3309 \
3310 product(bool, DumpReplayDataOnError, true, \
3311 "Record replay data for crashing compiler threads") \
3312 \
3313 product(bool, CICompilerCountPerCPU, false, \
3314 "1 compiler thread for log(N CPUs)") \
3315 \
3316 develop(intx, CIFireOOMAt, -1, \
3317 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3318 "(non-negative value throws OOM after this many CI accesses " \
3319 "in each compile)") \
3320 notproduct(intx, CICrashAt, -1, \
3321 "id of compilation to trigger assert in compiler thread for " \
3322 "the purpose of testing, e.g. generation of replay data") \
3323 notproduct(bool, CIObjectFactoryVerify, false, \
3324 "enable potentially expensive verification in ciObjectFactory") \
3325 \
3326 /* Priorities */ \
3327 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3328 \
3329 product(intx, ThreadPriorityPolicy, 0, \
3330 "0 : Normal. "\
3331 " VM chooses priorities that are appropriate for normal "\
3332 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3333 " to normal native priority. Java priorities below NORM_PRIORITY"\
3334 " map to lower native priority values. On Windows applications"\
3335 " are allowed to use higher native priorities. However, with "\
3336 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
3337 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
3338 " interfere with system threads. On Linux thread priorities "\
3339 " are ignored because the OS does not support static priority "\
3340 " in SCHED_OTHER scheduling class which is the only choice for"\
3341 " non-root, non-realtime applications. "\
3342 "1 : Aggressive. "\
3343 " Java thread priorities map over to the entire range of "\
3344 " native thread priorities. Higher Java thread priorities map "\
3345 " to higher native thread priorities. This policy should be "\
3346 " used with care, as sometimes it can cause performance "\
3347 " degradation in the application and/or the entire system. On "\
3348 " Linux this policy requires root privilege.") \
3349 \
3350 product(bool, ThreadPriorityVerbose, false, \
3351 "Print priority changes") \
3352 \
3353 product(intx, DefaultThreadPriority, -1, \
3354 "The native priority at which threads run if not elsewhere " \
3355 "specified (-1 means no change)") \
3356 \
3357 product(intx, CompilerThreadPriority, -1, \
3358 "The native priority at which compiler threads should run " \
3359 "(-1 means no change)") \
3360 \
3361 product(intx, VMThreadPriority, -1, \
3362 "The native priority at which the VM thread should run " \
3363 "(-1 means no change)") \
3364 \
3365 product(bool, CompilerThreadHintNoPreempt, true, \
3366 "(Solaris only) Give compiler threads an extra quanta") \
3367 \
3368 product(bool, VMThreadHintNoPreempt, false, \
3369 "(Solaris only) Give VM thread an extra quanta") \
3370 \
3371 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3372 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3373 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3374 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3375 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3376 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3377 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3378 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3379 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3380 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3381 \
3382 experimental(bool, UseCriticalJavaThreadPriority, false, \
3383 "Java thread priority 10 maps to critical scheduling priority") \
3384 \
3385 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3386 "Compiler thread(s) run at critical scheduling priority") \
3387 \
3388 experimental(bool, UseCriticalCMSThreadPriority, false, \
3389 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3390 \
3391 /* compiler debugging */ \
3392 notproduct(intx, CompileTheWorldStartAt, 1, \
3393 "First class to consider when using +CompileTheWorld") \
3394 \
3395 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3396 "Last class to consider when using +CompileTheWorld") \
3397 \
3398 develop(intx, NewCodeParameter, 0, \
3399 "Testing Only: Create a dedicated integer parameter before " \
3400 "putback") \
3401 \
3402 /* new oopmap storage allocation */ \
3403 develop(intx, MinOopMapAllocation, 8, \
3404 "Minimum number of OopMap entries in an OopMapSet") \
3405 \
3406 /* Background Compilation */ \
3407 develop(intx, LongCompileThreshold, 50, \
3408 "Used with +TraceLongCompiles") \
3409 \
3410 product(intx, StarvationMonitorInterval, 200, \
3411 "Pause between each check in ms") \
3412 \
3413 /* recompilation */ \
3414 product_pd(intx, CompileThreshold, \
3415 "number of interpreted method invocations before (re-)compiling") \
3416 \
3417 product_pd(intx, BackEdgeThreshold, \
3418 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3419 \
3420 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3421 "Interpreter (tier 0) invocation notification frequency.") \
3422 \
3423 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3424 "C1 without MDO (tier 2) invocation notification frequency.") \
3425 \
3426 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3427 "C1 with MDO profiling (tier 3) invocation notification " \
3428 "frequency.") \
3429 \
3430 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3431 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3432 \
3433 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3434 "Interpreter (tier 0) invocation notification frequency.") \
3435 \
3436 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3437 "C1 without MDO (tier 2) invocation notification frequency.") \
3438 \
3439 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3440 "C1 with MDO profiling (tier 3) invocation notification " \
3441 "frequency.") \
3442 \
3443 product(intx, Tier2CompileThreshold, 0, \
3444 "threshold at which tier 2 compilation is invoked") \
3445 \
3446 product(intx, Tier2BackEdgeThreshold, 0, \
3447 "Back edge threshold at which tier 2 compilation is invoked") \
3448 \
3449 product(intx, Tier3InvocationThreshold, 200, \
3450 "Compile if number of method invocations crosses this " \
3451 "threshold") \
3452 \
3453 product(intx, Tier3MinInvocationThreshold, 100, \
3454 "Minimum invocation to compile at tier 3") \
3455 \
3456 product(intx, Tier3CompileThreshold, 2000, \
3457 "Threshold at which tier 3 compilation is invoked (invocation " \
3458 "minimum must be satisfied.") \
3459 \
3460 product(intx, Tier3BackEdgeThreshold, 60000, \
3461 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3462 \
3463 product(intx, Tier4InvocationThreshold, 5000, \
3464 "Compile if number of method invocations crosses this " \
3465 "threshold") \
3466 \
3467 product(intx, Tier4MinInvocationThreshold, 600, \
3468 "Minimum invocation to compile at tier 4") \
3469 \
3470 product(intx, Tier4CompileThreshold, 15000, \
3471 "Threshold at which tier 4 compilation is invoked (invocation " \
3472 "minimum must be satisfied.") \
3473 \
3474 product(intx, Tier4BackEdgeThreshold, 40000, \
3475 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3476 \
3477 product(intx, Tier3DelayOn, 5, \
3478 "If C2 queue size grows over this amount per compiler thread " \
3479 "stop compiling at tier 3 and start compiling at tier 2") \
3480 \
3481 product(intx, Tier3DelayOff, 2, \
3482 "If C2 queue size is less than this amount per compiler thread " \
3483 "allow methods compiled at tier 2 transition to tier 3") \
3484 \
3485 product(intx, Tier3LoadFeedback, 5, \
3486 "Tier 3 thresholds will increase twofold when C1 queue size " \
3487 "reaches this amount per compiler thread") \
3488 \
3489 product(intx, Tier4LoadFeedback, 3, \
3490 "Tier 4 thresholds will increase twofold when C2 queue size " \
3491 "reaches this amount per compiler thread") \
3492 \
3493 product(intx, TieredCompileTaskTimeout, 50, \
3494 "Kill compile task if method was not used within " \
3495 "given timeout in milliseconds") \
3496 \
3497 product(intx, TieredStopAtLevel, 4, \
3498 "Stop at given compilation level") \
3499 \
3500 product(intx, Tier0ProfilingStartPercentage, 200, \
3501 "Start profiling in interpreter if the counters exceed tier 3" \
3502 "thresholds by the specified percentage") \
3503 \
3504 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3505 "Increase the compile threshold for C1 compilation if the code" \
3506 "cache is filled by the specified percentage.") \
3507 \
3508 product(intx, TieredRateUpdateMinTime, 1, \
3509 "Minimum rate sampling interval (in milliseconds)") \
3510 \
3511 product(intx, TieredRateUpdateMaxTime, 25, \
3512 "Maximum rate sampling interval (in milliseconds)") \
3513 \
3514 product_pd(bool, TieredCompilation, \
3515 "Enable tiered compilation") \
3516 \
3517 product(bool, PrintTieredEvents, false, \
3518 "Print tiered events notifications") \
3519 \
3520 product_pd(intx, OnStackReplacePercentage, \
3521 "NON_TIERED number of method invocations/branches (expressed as %"\
3522 "of CompileThreshold) before (re-)compiling OSR code") \
3523 \
3524 product(intx, InterpreterProfilePercentage, 33, \
3525 "NON_TIERED number of method invocations/branches (expressed as %"\
3526 "of CompileThreshold) before profiling in the interpreter") \
3527 \
3528 develop(intx, MaxRecompilationSearchLength, 10, \
3529 "max. # frames to inspect searching for recompilee") \
3530 \
3531 develop(intx, MaxInterpretedSearchLength, 3, \
3532 "max. # interp. frames to skip when searching for recompilee") \
3533 \
3534 develop(intx, DesiredMethodLimit, 8000, \
3535 "desired max. method size (in bytecodes) after inlining") \
3536 \
3537 develop(intx, HugeMethodLimit, 8000, \
3538 "don't compile methods larger than this if " \
3539 "+DontCompileHugeMethods") \
3540 \
3541 /* New JDK 1.4 reflection implementation */ \
3542 \
3543 develop(bool, UseNewReflection, true, \
3544 "Temporary flag for transition to reflection based on dynamic " \
3545 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3546 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3547 "changes were needed") \
3548 \
3549 develop(bool, VerifyReflectionBytecodes, false, \
3550 "Force verification of 1.4 reflection bytecodes. Does not work " \
3551 "in situations like that described in 4486457 or for " \
3552 "constructors generated for serialization, so can not be enabled "\
3553 "in product.") \
3554 \
3555 product(bool, ReflectionWrapResolutionErrors, true, \
3556 "Temporary flag for transition to AbstractMethodError wrapped " \
3557 "in InvocationTargetException. See 6531596") \
3558 \
3559 develop(bool, VerifyLambdaBytecodes, false, \
3560 "Force verification of jdk 8 lambda metafactory bytecodes.") \
3561 \
3562 develop(intx, FastSuperclassLimit, 8, \
3563 "Depth of hardwired instanceof accelerator array") \
3564 \
3565 /* Properties for Java libraries */ \
3566 \
3567 product(uintx, MaxDirectMemorySize, 0, \
3568 "Maximum total size of NIO direct-buffer allocations") \
3569 \
3570 /* temporary developer defined flags */ \
3571 \
3572 diagnostic(bool, UseNewCode, false, \
3573 "Testing Only: Use the new version while testing") \
3574 \
3575 diagnostic(bool, UseNewCode2, false, \
3576 "Testing Only: Use the new version while testing") \
3577 \
3578 diagnostic(bool, UseNewCode3, false, \
3579 "Testing Only: Use the new version while testing") \
3580 \
3581 /* flags for performance data collection */ \
3582 \
3583 product(bool, UsePerfData, falseInEmbedded, \
3584 "Flag to disable jvmstat instrumentation for performance testing" \
3585 "and problem isolation purposes.") \
3586 \
3587 product(bool, PerfDataSaveToFile, false, \
3588 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3589 \
3590 product(ccstr, PerfDataSaveFile, NULL, \
3591 "Save PerfData memory to the specified absolute pathname," \
3592 "%p in the file name if present will be replaced by pid") \
3593 \
3594 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3595 "Data sampling interval in milliseconds") \
3596 \
3597 develop(bool, PerfTraceDataCreation, false, \
3598 "Trace creation of Performance Data Entries") \
3599 \
3600 develop(bool, PerfTraceMemOps, false, \
3601 "Trace PerfMemory create/attach/detach calls") \
3602 \
3603 product(bool, PerfDisableSharedMem, false, \
3604 "Store performance data in standard memory") \
3605 \
3606 product(intx, PerfDataMemorySize, 32*K, \
3607 "Size of performance data memory region. Will be rounded " \
3608 "up to a multiple of the native os page size.") \
3609 \
3610 product(intx, PerfMaxStringConstLength, 1024, \
3611 "Maximum PerfStringConstant string length before truncation") \
3612 \
3613 product(bool, PerfAllowAtExitRegistration, false, \
3614 "Allow registration of atexit() methods") \
3615 \
3616 product(bool, PerfBypassFileSystemCheck, false, \
3617 "Bypass Win32 file system criteria checks (Windows Only)") \
3618 \
3619 product(intx, UnguardOnExecutionViolation, 0, \
3620 "Unguard page and retry on no-execute fault (Win32 only)" \
3621 "0=off, 1=conservative, 2=aggressive") \
3622 \
3623 /* Serviceability Support */ \
3624 \
3625 product(bool, ManagementServer, false, \
3626 "Create JMX Management Server") \
3627 \
3628 product(bool, DisableAttachMechanism, false, \
3629 "Disable mechanism that allows tools to attach to this VM") \
3630 \
3631 product(bool, StartAttachListener, false, \
3632 "Always start Attach Listener at VM startup") \
3633 \
3634 manageable(bool, PrintConcurrentLocks, false, \
3635 "Print java.util.concurrent locks in thread dump") \
3636 \
3637 product(bool, TransmitErrorReport, false, \
3638 "Enable error report transmission on erroneous termination") \
3639 \
3640 product(ccstr, ErrorReportServer, NULL, \
3641 "Override built-in error report server address") \
3642 \
3643 /* Shared spaces */ \
3644 \
3645 product(bool, UseSharedSpaces, true, \
3646 "Use shared spaces for metadata") \
3647 \
3648 product(bool, RequireSharedSpaces, false, \
3649 "Require shared spaces for metadata") \
3650 \
3651 product(bool, DumpSharedSpaces, false, \
3652 "Special mode: JVM reads a class list, loads classes, builds " \
3653 "shared spaces, and dumps the shared spaces to a file to be " \
3654 "used in future JVM runs.") \
3655 \
3656 product(bool, PrintSharedSpaces, false, \
3657 "Print usage of shared spaces") \
3658 \
3659 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3660 "Size of read-write space for metadata (in bytes)") \
3661 \
3662 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3663 "Size of read-only space for metadata (in bytes)") \
3664 \
3665 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \
3666 "Size of the shared miscellaneous data area (in bytes)") \
3667 \
3668 product(uintx, SharedMiscCodeSize, 120*K, \
3669 "Size of the shared miscellaneous code area (in bytes)") \
3670 \
3671 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \
3672 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
3673 "Address to allocate shared memory region for class data") \
3674 \
3675 diagnostic(bool, EnableInvokeDynamic, true, \
3676 "support JSR 292 (method handles, invokedynamic, " \
3677 "anonymous classes") \
3678 \
3679 diagnostic(bool, PrintMethodHandleStubs, false, \
3680 "Print generated stub code for method handles") \
3681 \
3682 develop(bool, TraceMethodHandles, false, \
3683 "trace internal method handle operations") \
3684 \
3685 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3686 "perform extra checks when constructing method handles") \
3687 \
3688 diagnostic(bool, ShowHiddenFrames, false, \
3689 "show method handle implementation frames (usually hidden)") \
3690 \
3691 experimental(bool, TrustFinalNonStaticFields, false, \
3692 "trust final non-static declarations for constant folding") \
3693 \
3694 experimental(bool, FoldStableValues, false, \
3695 "Private flag to control optimizations for stable variables") \
3696 \
3697 develop(bool, TraceInvokeDynamic, false, \
3698 "trace internal invoke dynamic operations") \
3699 \
3700 diagnostic(bool, PauseAtStartup, false, \
3701 "Causes the VM to pause at startup time and wait for the pause " \
3702 "file to be removed (default: ./vm.paused.<pid>)") \
3703 \
3704 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3705 "The file to create and for whose removal to await when pausing " \
3706 "at startup. (default: ./vm.paused.<pid>)") \
3707 \
3708 diagnostic(bool, PauseAtExit, false, \
3709 "Pause and wait for keypress on exit if a debugger is attached") \
3710 \
3711 product(bool, ExtendedDTraceProbes, false, \
3712 "Enable performance-impacting dtrace probes") \
3713 \
3714 product(bool, DTraceMethodProbes, false, \
3715 "Enable dtrace probes for method-entry and method-exit") \
3716 \
3717 product(bool, DTraceAllocProbes, false, \
3718 "Enable dtrace probes for object allocation") \
3719 \
3720 product(bool, DTraceMonitorProbes, false, \
3721 "Enable dtrace probes for monitor events") \
3722 \
3723 product(bool, RelaxAccessControlCheck, false, \
3724 "Relax the access control checks in the verifier") \
3725 \
3726 diagnostic(bool, PrintDTraceDOF, false, \
3727 "Print the DTrace DOF passed to the system for JSDT probes") \
3728 \
3729 product(uintx, StringTableSize, defaultStringTableSize, \
3730 "Number of buckets in the interned String table") \
3731 \
3732 develop(bool, TraceDefaultMethods, false, \
3733 "Trace the default method processing steps") \
3734 \
3735 develop(bool, VerifyGenericSignatures, false, \
3736 "Abort VM on erroneous or inconsistent generic signatures") \
3737 \
3738 product(bool, UseVMInterruptibleIO, false, \
3739 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3740 "EINTR for I/O operations results in OS_INTRPT. The default value"\
3741 " of this flag is true for JDK 6 and earlier") \
3742 \
3743 diagnostic(bool, WhiteBoxAPI, false, \
3744 "Enable internal testing APIs") \
3745 \
3746 product(bool, PrintGCCause, true, \
3747 "Include GC cause in GC logging") \
3748 \
3749 product(bool , AllowNonVirtualCalls, false, \
3750 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3751 \
3752 diagnostic(ccstr, SharedArchiveFile, NULL, \
3753 "Override the default location of the CDS archive file") \
3754 \
3755 experimental(uintx, ArrayAllocatorMallocLimit, \
3756 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
3757 "Allocation less than this value will be allocated " \
3758 "using malloc. Larger allocations will use mmap.") \
3759 \
3760 product(bool, EnableTracing, false, \
3761 "Enable event-based tracing") \
3762 product(bool, UseLockedTracing, false, \
3763 "Use locked-tracing when doing event-based tracing")
3766 /*
3767 * Macros for factoring of globals
3768 */
3770 // Interface macros
3771 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3772 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3773 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3774 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3775 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3776 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3777 #ifdef PRODUCT
3778 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value;
3779 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name;
3780 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name;
3781 #else
3782 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3783 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3784 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3785 #endif
3786 // Special LP64 flags, product only needed for now.
3787 #ifdef _LP64
3788 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3789 #else
3790 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3791 #endif // _LP64
3793 // Implementation macros
3794 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3795 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3796 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3797 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3798 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3799 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3800 #ifdef PRODUCT
3801 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value;
3802 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name;
3803 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value;
3804 #else
3805 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3806 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3807 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3808 #endif
3809 #ifdef _LP64
3810 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3811 #else
3812 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3813 #endif // _LP64
3815 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)
3817 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3819 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3821 // Extensions
3823 #include "runtime/globals_ext.hpp"
3825 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP