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src/share/vm/runtime/globals.hpp@abe03600372a
src/share/vm/runtime/globals.hpp
Sun, 15 Sep 2013 15:28:58 +0200
- author
- goetz
- date
- Sun, 15 Sep 2013 15:28:58 +0200
- changeset 6470
- abe03600372a
- parent 6462
- e2722a66aba7
- child 6472
- 2b8e28fdf503
- permissions
- -rw-r--r--
8024468: PPC64 (part 201): cppInterpreter: implement bytecode profiling
Summary: Implement profiling for c2 jit compilation. Also enable new cppInterpreter features.
Reviewed-by: 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_aix
65 # include "globals_aix.hpp"
66 #endif
67 #ifdef TARGET_OS_FAMILY_bsd
68 # include "globals_bsd.hpp"
69 #endif
70 #ifdef TARGET_OS_ARCH_linux_x86
71 # include "globals_linux_x86.hpp"
72 #endif
73 #ifdef TARGET_OS_ARCH_linux_sparc
74 # include "globals_linux_sparc.hpp"
75 #endif
76 #ifdef TARGET_OS_ARCH_linux_zero
77 # include "globals_linux_zero.hpp"
78 #endif
79 #ifdef TARGET_OS_ARCH_solaris_x86
80 # include "globals_solaris_x86.hpp"
81 #endif
82 #ifdef TARGET_OS_ARCH_solaris_sparc
83 # include "globals_solaris_sparc.hpp"
84 #endif
85 #ifdef TARGET_OS_ARCH_windows_x86
86 # include "globals_windows_x86.hpp"
87 #endif
88 #ifdef TARGET_OS_ARCH_linux_arm
89 # include "globals_linux_arm.hpp"
90 #endif
91 #ifdef TARGET_OS_ARCH_linux_ppc
92 # include "globals_linux_ppc.hpp"
93 #endif
94 #ifdef TARGET_OS_ARCH_aix_ppc
95 # include "globals_aix_ppc.hpp"
96 #endif
97 #ifdef TARGET_OS_ARCH_bsd_x86
98 # include "globals_bsd_x86.hpp"
99 #endif
100 #ifdef TARGET_OS_ARCH_bsd_zero
101 # include "globals_bsd_zero.hpp"
102 #endif
103 #ifdef COMPILER1
104 #ifdef TARGET_ARCH_x86
105 # include "c1_globals_x86.hpp"
106 #endif
107 #ifdef TARGET_ARCH_sparc
108 # include "c1_globals_sparc.hpp"
109 #endif
110 #ifdef TARGET_ARCH_arm
111 # include "c1_globals_arm.hpp"
112 #endif
113 #ifdef TARGET_ARCH_ppc
114 # include "c1_globals_ppc.hpp"
115 #endif
116 #ifdef TARGET_OS_FAMILY_linux
117 # include "c1_globals_linux.hpp"
118 #endif
119 #ifdef TARGET_OS_FAMILY_solaris
120 # include "c1_globals_solaris.hpp"
121 #endif
122 #ifdef TARGET_OS_FAMILY_windows
123 # include "c1_globals_windows.hpp"
124 #endif
125 #ifdef TARGET_OS_FAMILY_aix
126 # include "c1_globals_aix.hpp"
127 #endif
128 #ifdef TARGET_OS_FAMILY_bsd
129 # include "c1_globals_bsd.hpp"
130 #endif
131 #endif
132 #ifdef COMPILER2
133 #ifdef TARGET_ARCH_x86
134 # include "c2_globals_x86.hpp"
135 #endif
136 #ifdef TARGET_ARCH_sparc
137 # include "c2_globals_sparc.hpp"
138 #endif
139 #ifdef TARGET_ARCH_arm
140 # include "c2_globals_arm.hpp"
141 #endif
142 #ifdef TARGET_ARCH_ppc
143 # include "c2_globals_ppc.hpp"
144 #endif
145 #ifdef TARGET_OS_FAMILY_linux
146 # include "c2_globals_linux.hpp"
147 #endif
148 #ifdef TARGET_OS_FAMILY_solaris
149 # include "c2_globals_solaris.hpp"
150 #endif
151 #ifdef TARGET_OS_FAMILY_windows
152 # include "c2_globals_windows.hpp"
153 #endif
154 #ifdef TARGET_OS_FAMILY_aix
155 # include "c2_globals_aix.hpp"
156 #endif
157 #ifdef TARGET_OS_FAMILY_bsd
158 # include "c2_globals_bsd.hpp"
159 #endif
160 #endif
161 #ifdef SHARK
162 #ifdef TARGET_ARCH_zero
163 # include "shark_globals_zero.hpp"
164 #endif
165 #endif
167 #if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)
168 define_pd_global(bool, BackgroundCompilation, false);
169 define_pd_global(bool, UseTLAB, false);
170 define_pd_global(bool, CICompileOSR, false);
171 define_pd_global(bool, UseTypeProfile, false);
172 define_pd_global(bool, UseOnStackReplacement, false);
173 define_pd_global(bool, InlineIntrinsics, false);
174 define_pd_global(bool, PreferInterpreterNativeStubs, true);
175 define_pd_global(bool, ProfileInterpreter, false);
176 define_pd_global(bool, ProfileTraps, false);
177 define_pd_global(bool, TieredCompilation, false);
179 define_pd_global(intx, CompileThreshold, 0);
180 define_pd_global(intx, BackEdgeThreshold, 0);
182 define_pd_global(intx, OnStackReplacePercentage, 0);
183 define_pd_global(bool, ResizeTLAB, false);
184 define_pd_global(intx, FreqInlineSize, 0);
185 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
186 define_pd_global(intx, InlineClassNatives, true);
187 define_pd_global(intx, InlineUnsafeOps, true);
188 define_pd_global(intx, InitialCodeCacheSize, 160*K);
189 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
190 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
191 define_pd_global(intx, CodeCacheMinBlockLength, 1);
192 define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K);
193 define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M));
194 define_pd_global(bool, NeverActAsServerClassMachine, true);
195 define_pd_global(uint64_t,MaxRAM, 1ULL*G);
196 #define CI_COMPILER_COUNT 0
197 #else
199 #ifdef COMPILER2
200 #define CI_COMPILER_COUNT 2
201 #else
202 #define CI_COMPILER_COUNT 1
203 #endif // COMPILER2
205 #endif // no compilers
207 // string type aliases used only in this file
208 typedef const char* ccstr;
209 typedef const char* ccstrlist; // represents string arguments which accumulate
211 enum FlagValueOrigin {
212 DEFAULT = 0,
213 COMMAND_LINE = 1,
214 ENVIRON_VAR = 2,
215 CONFIG_FILE = 3,
216 MANAGEMENT = 4,
217 ERGONOMIC = 5,
218 ATTACH_ON_DEMAND = 6,
219 INTERNAL = 99
220 };
222 struct Flag {
223 const char *type;
224 const char *name;
225 void* addr;
227 NOT_PRODUCT(const char *doc;)
229 const char *kind;
230 FlagValueOrigin origin;
232 // points to all Flags static array
233 static Flag *flags;
235 // number of flags
236 static size_t numFlags;
238 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false);
239 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
241 bool is_bool() const { return strcmp(type, "bool") == 0; }
242 bool get_bool() const { return *((bool*) addr); }
243 void set_bool(bool value) { *((bool*) addr) = value; }
245 bool is_intx() const { return strcmp(type, "intx") == 0; }
246 intx get_intx() const { return *((intx*) addr); }
247 void set_intx(intx value) { *((intx*) addr) = value; }
249 bool is_uintx() const { return strcmp(type, "uintx") == 0; }
250 uintx get_uintx() const { return *((uintx*) addr); }
251 void set_uintx(uintx value) { *((uintx*) addr) = value; }
253 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; }
254 uint64_t get_uint64_t() const { return *((uint64_t*) addr); }
255 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; }
257 bool is_double() const { return strcmp(type, "double") == 0; }
258 double get_double() const { return *((double*) addr); }
259 void set_double(double value) { *((double*) addr) = value; }
261 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
262 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
263 ccstr get_ccstr() const { return *((ccstr*) addr); }
264 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
266 bool is_unlocker() const;
267 bool is_unlocked() const;
268 bool is_writeable() const;
269 bool is_external() const;
271 bool is_unlocker_ext() const;
272 bool is_unlocked_ext() const;
273 bool is_writeable_ext() const;
274 bool is_external_ext() const;
276 void get_locked_message(char*, int) const;
277 void get_locked_message_ext(char*, int) const;
279 void print_on(outputStream* st, bool withComments = false );
280 void print_as_flag(outputStream* st);
281 };
283 // debug flags control various aspects of the VM and are global accessible
285 // use FlagSetting to temporarily change some debug flag
286 // e.g. FlagSetting fs(DebugThisAndThat, true);
287 // restored to previous value upon leaving scope
288 class FlagSetting {
289 bool val;
290 bool* flag;
291 public:
292 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
293 ~FlagSetting() { *flag = val; }
294 };
297 class CounterSetting {
298 intx* counter;
299 public:
300 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
301 ~CounterSetting() { (*counter)--; }
302 };
305 class UIntFlagSetting {
306 uintx val;
307 uintx* flag;
308 public:
309 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; }
310 ~UIntFlagSetting() { *flag = val; }
311 };
314 class DoubleFlagSetting {
315 double val;
316 double* flag;
317 public:
318 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
319 ~DoubleFlagSetting() { *flag = val; }
320 };
323 class CommandLineFlags {
324 public:
325 static bool boolAt(char* name, size_t len, bool* value);
326 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
327 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
328 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
330 static bool intxAt(char* name, size_t len, intx* value);
331 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
332 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
333 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
335 static bool uintxAt(char* name, size_t len, uintx* value);
336 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
337 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
338 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
340 static bool uint64_tAt(char* name, size_t len, uint64_t* value);
341 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
342 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin);
343 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
345 static bool doubleAt(char* name, size_t len, double* value);
346 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
347 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
348 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
350 static bool ccstrAt(char* name, size_t len, ccstr* value);
351 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
352 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
353 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
355 // Returns false if name is not a command line flag.
356 static bool wasSetOnCmdline(const char* name, bool* value);
357 static void printSetFlags(outputStream* out);
359 static void printFlags(outputStream* out, bool withComments);
361 static void verify() PRODUCT_RETURN;
362 };
364 // use this for flags that are true by default in the debug version but
365 // false in the optimized version, and vice versa
366 #ifdef ASSERT
367 #define trueInDebug true
368 #define falseInDebug false
369 #else
370 #define trueInDebug false
371 #define falseInDebug true
372 #endif
374 // use this for flags that are true per default in the product build
375 // but false in development builds, and vice versa
376 #ifdef PRODUCT
377 #define trueInProduct true
378 #define falseInProduct false
379 #else
380 #define trueInProduct false
381 #define falseInProduct true
382 #endif
384 #ifdef JAVASE_EMBEDDED
385 #define falseInEmbedded false
386 #else
387 #define falseInEmbedded true
388 #endif
390 // develop flags are settable / visible only during development and are constant in the PRODUCT version
391 // product flags are always settable / visible
392 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
394 // A flag must be declared with one of the following types:
395 // bool, intx, uintx, ccstr.
396 // The type "ccstr" is an alias for "const char*" and is used
397 // only in this file, because the macrology requires single-token type names.
399 // Note: Diagnostic options not meant for VM tuning or for product modes.
400 // They are to be used for VM quality assurance or field diagnosis
401 // of VM bugs. They are hidden so that users will not be encouraged to
402 // try them as if they were VM ordinary execution options. However, they
403 // are available in the product version of the VM. Under instruction
404 // from support engineers, VM customers can turn them on to collect
405 // diagnostic information about VM problems. To use a VM diagnostic
406 // option, you must first specify +UnlockDiagnosticVMOptions.
407 // (This master switch also affects the behavior of -Xprintflags.)
408 //
409 // experimental flags are in support of features that are not
410 // part of the officially supported product, but are available
411 // for experimenting with. They could, for example, be performance
412 // features that may not have undergone full or rigorous QA, but which may
413 // help performance in some cases and released for experimentation
414 // by the community of users and developers. This flag also allows one to
415 // be able to build a fully supported product that nonetheless also
416 // ships with some unsupported, lightly tested, experimental features.
417 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
418 // UnlockExperimentalVMOptions flag, which allows the control and
419 // modification of the experimental flags.
420 //
421 // Nota bene: neither diagnostic nor experimental options should be used casually,
422 // and they are not supported on production loads, except under explicit
423 // direction from support engineers.
424 //
425 // manageable flags are writeable external product flags.
426 // They are dynamically writeable through the JDK management interface
427 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
428 // These flags are external exported interface (see CCC). The list of
429 // manageable flags can be queried programmatically through the management
430 // interface.
431 //
432 // A flag can be made as "manageable" only if
433 // - the flag is defined in a CCC as an external exported interface.
434 // - the VM implementation supports dynamic setting of the flag.
435 // This implies that the VM must *always* query the flag variable
436 // and not reuse state related to the flag state at any given time.
437 // - you want the flag to be queried programmatically by the customers.
438 //
439 // product_rw flags are writeable internal product flags.
440 // They are like "manageable" flags but for internal/private use.
441 // The list of product_rw flags are internal/private flags which
442 // may be changed/removed in a future release. It can be set
443 // through the management interface to get/set value
444 // when the name of flag is supplied.
445 //
446 // A flag can be made as "product_rw" only if
447 // - the VM implementation supports dynamic setting of the flag.
448 // This implies that the VM must *always* query the flag variable
449 // and not reuse state related to the flag state at any given time.
450 //
451 // Note that when there is a need to support develop flags to be writeable,
452 // it can be done in the same way as product_rw.
454 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
455 \
456 lp64_product(bool, UseCompressedOops, false, \
457 "Use 32-bit object references in 64-bit VM " \
458 "lp64_product means flag is always constant in 32 bit VM") \
459 \
460 lp64_product(bool, UseCompressedKlassPointers, false, \
461 "Use 32-bit klass pointers in 64-bit VM " \
462 "lp64_product means flag is always constant in 32 bit VM") \
463 \
464 notproduct(bool, CheckCompressedOops, true, \
465 "generate checks in encoding/decoding code in debug VM") \
466 \
467 product_pd(uintx, HeapBaseMinAddress, \
468 "OS specific low limit for heap base address") \
469 \
470 diagnostic(bool, PrintCompressedOopsMode, false, \
471 "Print compressed oops base address and encoding mode") \
472 \
473 lp64_product(intx, ObjectAlignmentInBytes, 8, \
474 "Default object alignment in bytes, 8 is minimum") \
475 \
476 product(bool, AssumeMP, false, \
477 "Instruct the VM to assume multiple processors are available") \
478 \
479 /* UseMembar is theoretically a temp flag used for memory barrier \
480 * removal testing. It was supposed to be removed before FCS but has \
481 * been re-added (see 6401008) */ \
482 product_pd(bool, UseMembar, \
483 "(Unstable) Issues membars on thread state transitions") \
484 \
485 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \
486 * that don't support it. This will be replaced by processor detection \
487 * logic. \
488 */ \
489 product(bool, UsePPCLWSYNC, true, \
490 "Use lwsync instruction if true, else use slower sync") \
491 \
492 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
493 "Whether to clean the chunk pool asynchronously") \
494 \
495 /* Temporary: See 6948537 */ \
496 experimental(bool, UseMemSetInBOT, true, \
497 "(Unstable) uses memset in BOT updates in GC code") \
498 \
499 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
500 "Enable normal processing of flags relating to field diagnostics")\
501 \
502 experimental(bool, UnlockExperimentalVMOptions, false, \
503 "Enable normal processing of flags relating to experimental features")\
504 \
505 product(bool, JavaMonitorsInStackTrace, true, \
506 "Print info. about Java monitor locks when the stacks are dumped")\
507 \
508 product_pd(bool, UseLargePages, \
509 "Use large page memory") \
510 \
511 product_pd(bool, UseLargePagesIndividualAllocation, \
512 "Allocate large pages individually for better affinity") \
513 \
514 develop(bool, LargePagesIndividualAllocationInjectError, false, \
515 "Fail large pages individual allocation") \
516 \
517 develop(bool, TracePageSizes, false, \
518 "Trace page size selection and usage.") \
519 \
520 product(bool, UseNUMA, false, \
521 "Use NUMA if available") \
522 \
523 product(bool, UseNUMAInterleaving, false, \
524 "Interleave memory across NUMA nodes if available") \
525 \
526 product(uintx, NUMAInterleaveGranularity, 2*M, \
527 "Granularity to use for NUMA interleaving on Windows OS") \
528 \
529 product(bool, ForceNUMA, false, \
530 "Force NUMA optimizations on single-node/UMA systems") \
531 \
532 product(uintx, NUMAChunkResizeWeight, 20, \
533 "Percentage (0-100) used to weigh the current sample when " \
534 "computing exponentially decaying average for " \
535 "AdaptiveNUMAChunkSizing") \
536 \
537 product(uintx, NUMASpaceResizeRate, 1*G, \
538 "Do not reallocate more that this amount per collection") \
539 \
540 product(bool, UseAdaptiveNUMAChunkSizing, true, \
541 "Enable adaptive chunk sizing for NUMA") \
542 \
543 product(bool, NUMAStats, false, \
544 "Print NUMA stats in detailed heap information") \
545 \
546 product(uintx, NUMAPageScanRate, 256, \
547 "Maximum number of pages to include in the page scan procedure") \
548 \
549 product_pd(bool, NeedsDeoptSuspend, \
550 "True for register window machines (sparc/ia64)") \
551 \
552 product(intx, UseSSE, 99, \
553 "Highest supported SSE instructions set on x86/x64") \
554 \
555 product(bool, UseAES, false, \
556 "Control whether AES instructions can be used on x86/x64") \
557 \
558 product(uintx, LargePageSizeInBytes, 0, \
559 "Large page size (0 to let VM choose the page size") \
560 \
561 product(uintx, LargePageHeapSizeThreshold, 128*M, \
562 "Use large pages if max heap is at least this big") \
563 \
564 product(bool, ForceTimeHighResolution, false, \
565 "Using high time resolution(For Win32 only)") \
566 \
567 develop(bool, TraceItables, false, \
568 "Trace initialization and use of itables") \
569 \
570 develop(bool, TracePcPatching, false, \
571 "Trace usage of frame::patch_pc") \
572 \
573 develop(bool, TraceJumps, false, \
574 "Trace assembly jumps in thread ring buffer") \
575 \
576 develop(bool, TraceRelocator, false, \
577 "Trace the bytecode relocator") \
578 \
579 develop(bool, TraceLongCompiles, false, \
580 "Print out every time compilation is longer than " \
581 "a given threashold") \
582 \
583 develop(bool, SafepointALot, false, \
584 "Generates a lot of safepoints. Works with " \
585 "GuaranteedSafepointInterval") \
586 \
587 product_pd(bool, BackgroundCompilation, \
588 "A thread requesting compilation is not blocked during " \
589 "compilation") \
590 \
591 product(bool, PrintVMQWaitTime, false, \
592 "Prints out the waiting time in VM operation queue") \
593 \
594 develop(bool, NoYieldsInMicrolock, false, \
595 "Disable yields in microlock") \
596 \
597 develop(bool, TraceOopMapGeneration, false, \
598 "Shows oopmap generation") \
599 \
600 product(bool, MethodFlushing, true, \
601 "Reclamation of zombie and not-entrant methods") \
602 \
603 develop(bool, VerifyStack, false, \
604 "Verify stack of each thread when it is entering a runtime call") \
605 \
606 diagnostic(bool, ForceUnreachable, false, \
607 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \
608 \
609 notproduct(bool, StressDerivedPointers, false, \
610 "Force scavenge when a derived pointers is detected on stack " \
611 "after rtm call") \
612 \
613 develop(bool, TraceDerivedPointers, false, \
614 "Trace traversal of derived pointers on stack") \
615 \
616 notproduct(bool, TraceCodeBlobStacks, false, \
617 "Trace stack-walk of codeblobs") \
618 \
619 product(bool, PrintJNIResolving, false, \
620 "Used to implement -v:jni") \
621 \
622 notproduct(bool, PrintRewrites, false, \
623 "Print methods that are being rewritten") \
624 \
625 product(bool, UseInlineCaches, true, \
626 "Use Inline Caches for virtual calls ") \
627 \
628 develop(bool, InlineArrayCopy, true, \
629 "inline arraycopy native that is known to be part of " \
630 "base library DLL") \
631 \
632 develop(bool, InlineObjectHash, true, \
633 "inline Object::hashCode() native that is known to be part " \
634 "of base library DLL") \
635 \
636 develop(bool, InlineNatives, true, \
637 "inline natives that are known to be part of base library DLL") \
638 \
639 develop(bool, InlineMathNatives, true, \
640 "inline SinD, CosD, etc.") \
641 \
642 develop(bool, InlineClassNatives, true, \
643 "inline Class.isInstance, etc") \
644 \
645 develop(bool, InlineThreadNatives, true, \
646 "inline Thread.currentThread, etc") \
647 \
648 develop(bool, InlineUnsafeOps, true, \
649 "inline memory ops (native methods) from sun.misc.Unsafe") \
650 \
651 product(bool, CriticalJNINatives, true, \
652 "check for critical JNI entry points") \
653 \
654 notproduct(bool, StressCriticalJNINatives, false, \
655 "Exercise register saving code in critical natives") \
656 \
657 product(bool, UseSSE42Intrinsics, false, \
658 "SSE4.2 versions of intrinsics") \
659 \
660 product(bool, UseAESIntrinsics, false, \
661 "use intrinsics for AES versions of crypto") \
662 \
663 product(bool, UseCRC32Intrinsics, false, \
664 "use intrinsics for java.util.zip.CRC32") \
665 \
666 develop(bool, TraceCallFixup, false, \
667 "traces all call fixups") \
668 \
669 develop(bool, DeoptimizeALot, false, \
670 "deoptimize at every exit from the runtime system") \
671 \
672 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
673 "a comma separated list of bcis to deoptimize at") \
674 \
675 product(bool, DeoptimizeRandom, false, \
676 "deoptimize random frames on random exit from the runtime system")\
677 \
678 notproduct(bool, ZombieALot, false, \
679 "creates zombies (non-entrant) at exit from the runt. system") \
680 \
681 product(bool, UnlinkSymbolsALot, false, \
682 "unlink unreferenced symbols from the symbol table at safepoints")\
683 \
684 notproduct(bool, WalkStackALot, false, \
685 "trace stack (no print) at every exit from the runtime system") \
686 \
687 product(bool, Debugging, false, \
688 "set when executing debug methods in debug.ccp " \
689 "(to prevent triggering assertions)") \
690 \
691 notproduct(bool, StrictSafepointChecks, trueInDebug, \
692 "Enable strict checks that safepoints cannot happen for threads " \
693 "that used No_Safepoint_Verifier") \
694 \
695 notproduct(bool, VerifyLastFrame, false, \
696 "Verify oops on last frame on entry to VM") \
697 \
698 develop(bool, TraceHandleAllocation, false, \
699 "Prints out warnings when suspicious many handles are allocated") \
700 \
701 product(bool, UseCompilerSafepoints, true, \
702 "Stop at safepoints in compiled code") \
703 \
704 product(bool, FailOverToOldVerifier, true, \
705 "fail over to old verifier when split verifier fails") \
706 \
707 develop(bool, ShowSafepointMsgs, false, \
708 "Show msg. about safepoint synch.") \
709 \
710 product(bool, SafepointTimeout, false, \
711 "Time out and warn or fail after SafepointTimeoutDelay " \
712 "milliseconds if failed to reach safepoint") \
713 \
714 develop(bool, DieOnSafepointTimeout, false, \
715 "Die upon failure to reach safepoint (see SafepointTimeout)") \
716 \
717 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
718 /* typically, at most a few retries are needed */ \
719 product(intx, SuspendRetryCount, 50, \
720 "Maximum retry count for an external suspend request") \
721 \
722 product(intx, SuspendRetryDelay, 5, \
723 "Milliseconds to delay per retry (* current_retry_count)") \
724 \
725 product(bool, AssertOnSuspendWaitFailure, false, \
726 "Assert/Guarantee on external suspend wait failure") \
727 \
728 product(bool, TraceSuspendWaitFailures, false, \
729 "Trace external suspend wait failures") \
730 \
731 product(bool, MaxFDLimit, true, \
732 "Bump the number of file descriptors to max in solaris.") \
733 \
734 diagnostic(bool, LogEvents, true, \
735 "Enable the various ring buffer event logs") \
736 \
737 diagnostic(uintx, LogEventsBufferEntries, 10, \
738 "Enable the various ring buffer event logs") \
739 \
740 product(bool, BytecodeVerificationRemote, true, \
741 "Enables the Java bytecode verifier for remote classes") \
742 \
743 product(bool, BytecodeVerificationLocal, false, \
744 "Enables the Java bytecode verifier for local classes") \
745 \
746 develop(bool, ForceFloatExceptions, trueInDebug, \
747 "Force exceptions on FP stack under/overflow") \
748 \
749 develop(bool, VerifyStackAtCalls, false, \
750 "Verify that the stack pointer is unchanged after calls") \
751 \
752 develop(bool, TraceJavaAssertions, false, \
753 "Trace java language assertions") \
754 \
755 notproduct(bool, CheckAssertionStatusDirectives, false, \
756 "temporary - see javaClasses.cpp") \
757 \
758 notproduct(bool, PrintMallocFree, false, \
759 "Trace calls to C heap malloc/free allocation") \
760 \
761 product(bool, PrintOopAddress, false, \
762 "Always print the location of the oop") \
763 \
764 notproduct(bool, VerifyCodeCacheOften, false, \
765 "Verify compiled-code cache often") \
766 \
767 develop(bool, ZapDeadCompiledLocals, false, \
768 "Zap dead locals in compiler frames") \
769 \
770 notproduct(bool, ZapDeadLocalsOld, false, \
771 "Zap dead locals (old version, zaps all frames when " \
772 "entering the VM") \
773 \
774 notproduct(bool, CheckOopishValues, false, \
775 "Warn if value contains oop ( requires ZapDeadLocals)") \
776 \
777 develop(bool, UseMallocOnly, false, \
778 "use only malloc/free for allocation (no resource area/arena)") \
779 \
780 develop(bool, PrintMalloc, false, \
781 "print all malloc/free calls") \
782 \
783 develop(bool, PrintMallocStatistics, false, \
784 "print malloc/free statistics") \
785 \
786 develop(bool, ZapResourceArea, trueInDebug, \
787 "Zap freed resource/arena space with 0xABABABAB") \
788 \
789 notproduct(bool, ZapVMHandleArea, trueInDebug, \
790 "Zap freed VM handle space with 0xBCBCBCBC") \
791 \
792 develop(bool, ZapJNIHandleArea, trueInDebug, \
793 "Zap freed JNI handle space with 0xFEFEFEFE") \
794 \
795 notproduct(bool, ZapStackSegments, trueInDebug, \
796 "Zap allocated/freed Stack segments with 0xFADFADED") \
797 \
798 develop(bool, ZapUnusedHeapArea, trueInDebug, \
799 "Zap unused heap space with 0xBAADBABE") \
800 \
801 develop(bool, TraceZapUnusedHeapArea, false, \
802 "Trace zapping of unused heap space") \
803 \
804 develop(bool, CheckZapUnusedHeapArea, false, \
805 "Check zapping of unused heap space") \
806 \
807 develop(bool, ZapFillerObjects, trueInDebug, \
808 "Zap filler objects with 0xDEAFBABE") \
809 \
810 develop(bool, PrintVMMessages, true, \
811 "Print vm messages on console") \
812 \
813 product(bool, PrintGCApplicationConcurrentTime, false, \
814 "Print the time the application has been running") \
815 \
816 product(bool, PrintGCApplicationStoppedTime, false, \
817 "Print the time the application has been stopped") \
818 \
819 diagnostic(bool, VerboseVerification, false, \
820 "Display detailed verification details") \
821 \
822 notproduct(uintx, ErrorHandlerTest, 0, \
823 "If > 0, provokes an error after VM initialization; the value" \
824 "determines which error to provoke. See test_error_handler()" \
825 "in debug.cpp.") \
826 \
827 develop(bool, Verbose, false, \
828 "Prints additional debugging information from other modes") \
829 \
830 develop(bool, PrintMiscellaneous, false, \
831 "Prints uncategorized debugging information (requires +Verbose)") \
832 \
833 develop(bool, WizardMode, false, \
834 "Prints much more debugging information") \
835 \
836 product(bool, ShowMessageBoxOnError, false, \
837 "Keep process alive on VM fatal error") \
838 \
839 product(bool, CreateMinidumpOnCrash, false, \
840 "Create minidump on VM fatal error") \
841 \
842 product_pd(bool, UseOSErrorReporting, \
843 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
844 \
845 product(bool, SuppressFatalErrorMessage, false, \
846 "Do NO Fatal Error report [Avoid deadlock]") \
847 \
848 product(ccstrlist, OnError, "", \
849 "Run user-defined commands on fatal error; see VMError.cpp " \
850 "for examples") \
851 \
852 product(ccstrlist, OnOutOfMemoryError, "", \
853 "Run user-defined commands on first java.lang.OutOfMemoryError") \
854 \
855 manageable(bool, HeapDumpBeforeFullGC, false, \
856 "Dump heap to file before any major stop-world GC") \
857 \
858 manageable(bool, HeapDumpAfterFullGC, false, \
859 "Dump heap to file after any major stop-world GC") \
860 \
861 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
862 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
863 \
864 manageable(ccstr, HeapDumpPath, NULL, \
865 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
866 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
867 "in the working directory)") \
868 \
869 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
870 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
871 "when the heap usage is larger than this") \
872 \
873 develop(uintx, HeapDumpSegmentSize, 1*G, \
874 "Approximate segment size when generating a segmented heap dump") \
875 \
876 develop(bool, BreakAtWarning, false, \
877 "Execute breakpoint upon encountering VM warning") \
878 \
879 develop(bool, TraceVMOperation, false, \
880 "Trace vm operations") \
881 \
882 develop(bool, UseFakeTimers, false, \
883 "Tells whether the VM should use system time or a fake timer") \
884 \
885 product(ccstr, NativeMemoryTracking, "off", \
886 "Native memory tracking options") \
887 \
888 diagnostic(bool, PrintNMTStatistics, false, \
889 "Print native memory tracking summary data if it is on") \
890 \
891 diagnostic(bool, AutoShutdownNMT, true, \
892 "Automatically shutdown native memory tracking under stress " \
893 "situation. When set to false, native memory tracking tries to " \
894 "stay alive at the expense of JVM performance") \
895 \
896 diagnostic(bool, LogCompilation, false, \
897 "Log compilation activity in detail to hotspot.log or LogFile") \
898 \
899 product(bool, PrintCompilation, false, \
900 "Print compilations") \
901 \
902 diagnostic(bool, TraceNMethodInstalls, false, \
903 "Trace nmethod intallation") \
904 \
905 diagnostic(intx, ScavengeRootsInCode, 2, \
906 "0: do not allow scavengable oops in the code cache; " \
907 "1: allow scavenging from the code cache; " \
908 "2: emit as many constants as the compiler can see") \
909 \
910 product(bool, AlwaysRestoreFPU, false, \
911 "Restore the FPU control word after every JNI call (expensive)") \
912 \
913 diagnostic(bool, PrintCompilation2, false, \
914 "Print additional statistics per compilation") \
915 \
916 diagnostic(bool, PrintAdapterHandlers, false, \
917 "Print code generated for i2c/c2i adapters") \
918 \
919 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \
920 "Verify that i2c/c2i adapters are called properly") \
921 \
922 develop(bool, VerifyAdapterSharing, false, \
923 "Verify that the code for shared adapters is the equivalent") \
924 \
925 diagnostic(bool, PrintAssembly, false, \
926 "Print assembly code (using external disassembler.so)") \
927 \
928 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
929 "Options string passed to disassembler.so") \
930 \
931 diagnostic(bool, PrintNMethods, false, \
932 "Print assembly code for nmethods when generated") \
933 \
934 diagnostic(bool, PrintNativeNMethods, false, \
935 "Print assembly code for native nmethods when generated") \
936 \
937 develop(bool, PrintDebugInfo, false, \
938 "Print debug information for all nmethods when generated") \
939 \
940 develop(bool, PrintRelocations, false, \
941 "Print relocation information for all nmethods when generated") \
942 \
943 develop(bool, PrintDependencies, false, \
944 "Print dependency information for all nmethods when generated") \
945 \
946 develop(bool, PrintExceptionHandlers, false, \
947 "Print exception handler tables for all nmethods when generated") \
948 \
949 develop(bool, StressCompiledExceptionHandlers, false, \
950 "Exercise compiled exception handlers") \
951 \
952 develop(bool, InterceptOSException, false, \
953 "Starts debugger when an implicit OS (e.g., NULL) " \
954 "exception happens") \
955 \
956 product(bool, PrintCodeCache, false, \
957 "Print the code cache memory usage when exiting") \
958 \
959 develop(bool, PrintCodeCache2, false, \
960 "Print detailed usage info on the code cache when exiting") \
961 \
962 product(bool, PrintCodeCacheOnCompilation, false, \
963 "Print the code cache memory usage each time a method is compiled") \
964 \
965 diagnostic(bool, PrintStubCode, false, \
966 "Print generated stub code") \
967 \
968 product(bool, StackTraceInThrowable, true, \
969 "Collect backtrace in throwable when exception happens") \
970 \
971 product(bool, OmitStackTraceInFastThrow, true, \
972 "Omit backtraces for some 'hot' exceptions in optimized code") \
973 \
974 product(bool, ProfilerPrintByteCodeStatistics, false, \
975 "Prints byte code statictics when dumping profiler output") \
976 \
977 product(bool, ProfilerRecordPC, false, \
978 "Collects tick for each 16 byte interval of compiled code") \
979 \
980 product(bool, ProfileVM, false, \
981 "Profiles ticks that fall within VM (either in the VM Thread " \
982 "or VM code called through stubs)") \
983 \
984 product(bool, ProfileIntervals, false, \
985 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
986 \
987 notproduct(bool, ProfilerCheckIntervals, false, \
988 "Collect and print info on spacing of profiler ticks") \
989 \
990 develop(bool, PrintJVMWarnings, false, \
991 "Prints warnings for unimplemented JVM functions") \
992 \
993 product(bool, PrintWarnings, true, \
994 "Prints JVM warnings to output stream") \
995 \
996 notproduct(uintx, WarnOnStalledSpinLock, 0, \
997 "Prints warnings for stalled SpinLocks") \
998 \
999 product(bool, RegisterFinalizersAtInit, true, \
1000 "Register finalizable objects at end of Object.<init> or " \
1001 "after allocation") \
1002 \
1003 develop(bool, RegisterReferences, true, \
1004 "Tells whether the VM should register soft/weak/final/phantom " \
1005 "references") \
1006 \
1007 develop(bool, IgnoreRewrites, false, \
1008 "Supress rewrites of bytecodes in the oopmap generator. " \
1009 "This is unsafe!") \
1010 \
1011 develop(bool, PrintCodeCacheExtension, false, \
1012 "Print extension of code cache") \
1013 \
1014 develop(bool, UsePrivilegedStack, true, \
1015 "Enable the security JVM functions") \
1016 \
1017 develop(bool, ProtectionDomainVerification, true, \
1018 "Verifies protection domain before resolution in system " \
1019 "dictionary") \
1020 \
1021 product(bool, ClassUnloading, true, \
1022 "Do unloading of classes") \
1023 \
1024 develop(bool, DisableStartThread, false, \
1025 "Disable starting of additional Java threads " \
1026 "(for debugging only)") \
1027 \
1028 develop(bool, MemProfiling, false, \
1029 "Write memory usage profiling to log file") \
1030 \
1031 notproduct(bool, PrintSystemDictionaryAtExit, false, \
1032 "Prints the system dictionary at exit") \
1033 \
1034 experimental(intx, PredictedLoadedClassCount, 0, \
1035 "Experimental: Tune loaded class cache starting size.") \
1036 \
1037 diagnostic(bool, UnsyncloadClass, false, \
1038 "Unstable: VM calls loadClass unsynchronized. Custom " \
1039 "class loader must call VM synchronized for findClass " \
1040 "and defineClass.") \
1041 \
1042 product(bool, AlwaysLockClassLoader, false, \
1043 "Require the VM to acquire the class loader lock before calling " \
1044 "loadClass() even for class loaders registering " \
1045 "as parallel capable") \
1046 \
1047 product(bool, AllowParallelDefineClass, false, \
1048 "Allow parallel defineClass requests for class loaders " \
1049 "registering as parallel capable") \
1050 \
1051 product(bool, MustCallLoadClassInternal, false, \
1052 "Call loadClassInternal() rather than loadClass()") \
1053 \
1054 product_pd(bool, DontYieldALot, \
1055 "Throw away obvious excess yield calls (for SOLARIS only)") \
1056 \
1057 product_pd(bool, ConvertSleepToYield, \
1058 "Converts sleep(0) to thread yield " \
1059 "(may be off for SOLARIS to improve GUI)") \
1060 \
1061 product(bool, ConvertYieldToSleep, false, \
1062 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
1063 "behavior (SOLARIS only)") \
1064 \
1065 product(bool, UseBoundThreads, true, \
1066 "Bind user level threads to kernel threads (for SOLARIS only)") \
1067 \
1068 develop(bool, UseDetachedThreads, true, \
1069 "Use detached threads that are recycled upon termination " \
1070 "(for SOLARIS only)") \
1071 \
1072 product(bool, UseLWPSynchronization, true, \
1073 "Use LWP-based instead of libthread-based synchronization " \
1074 "(SPARC only)") \
1075 \
1076 product(ccstr, SyncKnobs, NULL, \
1077 "(Unstable) Various monitor synchronization tunables") \
1078 \
1079 product(intx, EmitSync, 0, \
1080 "(Unsafe,Unstable) " \
1081 " Controls emission of inline sync fast-path code") \
1082 \
1083 product(intx, MonitorBound, 0, "Bound Monitor population") \
1084 \
1085 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
1086 \
1087 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
1088 \
1089 product(intx, SyncVerbose, 0, "(Unstable)" ) \
1090 \
1091 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
1092 \
1093 product(intx, hashCode, 5, \
1094 "(Unstable) select hashCode generation algorithm" ) \
1095 \
1096 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
1097 "(Unstable, Linux-specific)" \
1098 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
1099 \
1100 product(bool, FilterSpuriousWakeups, true, \
1101 "Prevent spurious or premature wakeups from object.wait " \
1102 "(Solaris only)") \
1103 \
1104 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
1105 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
1106 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
1107 \
1108 develop(bool, UsePthreads, false, \
1109 "Use pthread-based instead of libthread-based synchronization " \
1110 "(SPARC only)") \
1111 \
1112 product(bool, AdjustConcurrency, false, \
1113 "call thr_setconcurrency at thread create time to avoid " \
1114 "LWP starvation on MP systems (For Solaris Only)") \
1115 \
1116 product(bool, ReduceSignalUsage, false, \
1117 "Reduce the use of OS signals in Java and/or the VM") \
1118 \
1119 develop_pd(bool, ShareVtableStubs, \
1120 "Share vtable stubs (smaller code but worse branch prediction") \
1121 \
1122 develop(bool, LoadLineNumberTables, true, \
1123 "Tells whether the class file parser loads line number tables") \
1124 \
1125 develop(bool, LoadLocalVariableTables, true, \
1126 "Tells whether the class file parser loads local variable tables")\
1127 \
1128 develop(bool, LoadLocalVariableTypeTables, true, \
1129 "Tells whether the class file parser loads local variable type tables")\
1130 \
1131 product(bool, AllowUserSignalHandlers, false, \
1132 "Do not complain if the application installs signal handlers " \
1133 "(Solaris & Linux only)") \
1134 \
1135 product(bool, UseSignalChaining, true, \
1136 "Use signal-chaining to invoke signal handlers installed " \
1137 "by the application (Solaris & Linux only)") \
1138 \
1139 product(bool, UseAltSigs, false, \
1140 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
1141 "internal signals (Solaris only)") \
1142 \
1143 product(bool, AllowJNIEnvProxy, false, \
1144 "Allow JNIEnv proxies for jdbx") \
1145 \
1146 product(bool, JNIDetachReleasesMonitors, true, \
1147 "JNI DetachCurrentThread releases monitors owned by thread") \
1148 \
1149 product(bool, RestoreMXCSROnJNICalls, false, \
1150 "Restore MXCSR when returning from JNI calls") \
1151 \
1152 product(bool, CheckJNICalls, false, \
1153 "Verify all arguments to JNI calls") \
1154 \
1155 product(bool, UseFastJNIAccessors, true, \
1156 "Use optimized versions of Get<Primitive>Field") \
1157 \
1158 product(bool, EagerXrunInit, false, \
1159 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
1160 " but not all -Xrun libraries may support the state of the VM at this time") \
1161 \
1162 product(bool, PreserveAllAnnotations, false, \
1163 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
1164 \
1165 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1166 "Number of OutOfMemoryErrors preallocated with backtrace") \
1167 \
1168 product(bool, LazyBootClassLoader, true, \
1169 "Enable/disable lazy opening of boot class path entries") \
1170 \
1171 product(bool, UseXMMForArrayCopy, false, \
1172 "Use SSE2 MOVQ instruction for Arraycopy") \
1173 \
1174 product(intx, FieldsAllocationStyle, 1, \
1175 "0 - type based with oops first, 1 - with oops last, " \
1176 "2 - oops in super and sub classes are together") \
1177 \
1178 product(bool, CompactFields, true, \
1179 "Allocate nonstatic fields in gaps between previous fields") \
1180 \
1181 notproduct(bool, PrintFieldLayout, false, \
1182 "Print field layout for each class") \
1183 \
1184 product(intx, ContendedPaddingWidth, 128, \
1185 "How many bytes to pad the fields/classes marked @Contended with")\
1186 \
1187 product(bool, EnableContended, true, \
1188 "Enable @Contended annotation support") \
1189 \
1190 product(bool, RestrictContended, true, \
1191 "Restrict @Contended to trusted classes") \
1192 \
1193 product(bool, UseBiasedLocking, true, \
1194 "Enable biased locking in JVM") \
1195 \
1196 product(intx, BiasedLockingStartupDelay, 4000, \
1197 "Number of milliseconds to wait before enabling biased locking") \
1198 \
1199 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1200 "Print statistics of biased locking in JVM") \
1201 \
1202 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1203 "Threshold of number of revocations per type to try to " \
1204 "rebias all objects in the heap of that type") \
1205 \
1206 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1207 "Threshold of number of revocations per type to permanently " \
1208 "revoke biases of all objects in the heap of that type") \
1209 \
1210 product(intx, BiasedLockingDecayTime, 25000, \
1211 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1212 "type after previous bulk rebias") \
1213 \
1214 /* tracing */ \
1215 \
1216 notproduct(bool, TraceRuntimeCalls, false, \
1217 "Trace run-time calls") \
1218 \
1219 develop(bool, TraceJNICalls, false, \
1220 "Trace JNI calls") \
1221 \
1222 notproduct(bool, TraceJVMCalls, false, \
1223 "Trace JVM calls") \
1224 \
1225 product(ccstr, TraceJVMTI, NULL, \
1226 "Trace flags for JVMTI functions and events") \
1227 \
1228 /* This option can change an EMCP method into an obsolete method. */ \
1229 /* This can affect tests that except specific methods to be EMCP. */ \
1230 /* This option should be used with caution. */ \
1231 product(bool, StressLdcRewrite, false, \
1232 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1233 \
1234 product(intx, TraceRedefineClasses, 0, \
1235 "Trace level for JVMTI RedefineClasses") \
1236 \
1237 develop(bool, StressMethodComparator, false, \
1238 "run the MethodComparator on all loaded methods") \
1239 \
1240 /* change to false by default sometime after Mustang */ \
1241 product(bool, VerifyMergedCPBytecodes, true, \
1242 "Verify bytecodes after RedefineClasses constant pool merging") \
1243 \
1244 develop(bool, TraceJNIHandleAllocation, false, \
1245 "Trace allocation/deallocation of JNI handle blocks") \
1246 \
1247 develop(bool, TraceThreadEvents, false, \
1248 "Trace all thread events") \
1249 \
1250 develop(bool, TraceBytecodes, false, \
1251 "Trace bytecode execution") \
1252 \
1253 develop(bool, TraceClassInitialization, false, \
1254 "Trace class initialization") \
1255 \
1256 develop(bool, TraceExceptions, false, \
1257 "Trace exceptions") \
1258 \
1259 develop(bool, TraceICs, false, \
1260 "Trace inline cache changes") \
1261 \
1262 notproduct(bool, TraceInvocationCounterOverflow, false, \
1263 "Trace method invocation counter overflow") \
1264 \
1265 develop(bool, TraceInlineCacheClearing, false, \
1266 "Trace clearing of inline caches in nmethods") \
1267 \
1268 develop(bool, TraceDependencies, false, \
1269 "Trace dependencies") \
1270 \
1271 develop(bool, VerifyDependencies, trueInDebug, \
1272 "Exercise and verify the compilation dependency mechanism") \
1273 \
1274 develop(bool, TraceNewOopMapGeneration, false, \
1275 "Trace OopMapGeneration") \
1276 \
1277 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1278 "Trace OopMapGeneration: print detailed cell states") \
1279 \
1280 develop(bool, TimeOopMap, false, \
1281 "Time calls to GenerateOopMap::compute_map() in sum") \
1282 \
1283 develop(bool, TimeOopMap2, false, \
1284 "Time calls to GenerateOopMap::compute_map() individually") \
1285 \
1286 develop(bool, TraceMonitorMismatch, false, \
1287 "Trace monitor matching failures during OopMapGeneration") \
1288 \
1289 develop(bool, TraceOopMapRewrites, false, \
1290 "Trace rewritting of method oops during oop map generation") \
1291 \
1292 develop(bool, TraceSafepoint, false, \
1293 "Trace safepoint operations") \
1294 \
1295 develop(bool, TraceICBuffer, false, \
1296 "Trace usage of IC buffer") \
1297 \
1298 develop(bool, TraceCompiledIC, false, \
1299 "Trace changes of compiled IC") \
1300 \
1301 notproduct(bool, TraceZapDeadLocals, false, \
1302 "Trace zapping dead locals") \
1303 \
1304 develop(bool, TraceStartupTime, false, \
1305 "Trace setup time") \
1306 \
1307 develop(bool, TraceProtectionDomainVerification, false, \
1308 "Trace protection domain verifcation") \
1309 \
1310 develop(bool, TraceClearedExceptions, false, \
1311 "Prints when an exception is forcibly cleared") \
1312 \
1313 product(bool, TraceClassResolution, false, \
1314 "Trace all constant pool resolutions (for debugging)") \
1315 \
1316 product(bool, TraceBiasedLocking, false, \
1317 "Trace biased locking in JVM") \
1318 \
1319 product(bool, TraceMonitorInflation, false, \
1320 "Trace monitor inflation in JVM") \
1321 \
1322 /* gc */ \
1323 \
1324 product(bool, UseSerialGC, false, \
1325 "Use the serial garbage collector") \
1326 \
1327 product(bool, UseG1GC, false, \
1328 "Use the Garbage-First garbage collector") \
1329 \
1330 product(bool, UseParallelGC, false, \
1331 "Use the Parallel Scavenge garbage collector") \
1332 \
1333 product(bool, UseParallelOldGC, false, \
1334 "Use the Parallel Old garbage collector") \
1335 \
1336 product(uintx, HeapMaximumCompactionInterval, 20, \
1337 "How often should we maximally compact the heap (not allowing " \
1338 "any dead space)") \
1339 \
1340 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1341 "The collection count for the first maximum compaction") \
1342 \
1343 product(bool, UseMaximumCompactionOnSystemGC, true, \
1344 "In the Parallel Old garbage collector maximum compaction for " \
1345 "a system GC") \
1346 \
1347 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1348 "The mean used by the par compact dead wood" \
1349 "limiter (a number between 0-100).") \
1350 \
1351 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1352 "The standard deviation used by the par compact dead wood" \
1353 "limiter (a number between 0-100).") \
1354 \
1355 product(uintx, ParallelGCThreads, 0, \
1356 "Number of parallel threads parallel gc will use") \
1357 \
1358 product(bool, UseDynamicNumberOfGCThreads, false, \
1359 "Dynamically choose the number of parallel threads " \
1360 "parallel gc will use") \
1361 \
1362 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
1363 "Force dynamic selection of the number of" \
1364 "parallel threads parallel gc will use to aid debugging") \
1365 \
1366 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
1367 "Size of heap (bytes) per GC thread used in calculating the " \
1368 "number of GC threads") \
1369 \
1370 product(bool, TraceDynamicGCThreads, false, \
1371 "Trace the dynamic GC thread usage") \
1372 \
1373 develop(bool, ParallelOldGCSplitALot, false, \
1374 "Provoke splitting (copying data from a young gen space to" \
1375 "multiple destination spaces)") \
1376 \
1377 develop(uintx, ParallelOldGCSplitInterval, 3, \
1378 "How often to provoke splitting a young gen space") \
1379 \
1380 product(uintx, ConcGCThreads, 0, \
1381 "Number of threads concurrent gc will use") \
1382 \
1383 product(uintx, YoungPLABSize, 4096, \
1384 "Size of young gen promotion labs (in HeapWords)") \
1385 \
1386 product(uintx, OldPLABSize, 1024, \
1387 "Size of old gen promotion labs (in HeapWords)") \
1388 \
1389 product(uintx, GCTaskTimeStampEntries, 200, \
1390 "Number of time stamp entries per gc worker thread") \
1391 \
1392 product(bool, AlwaysTenure, false, \
1393 "Always tenure objects in eden. (ParallelGC only)") \
1394 \
1395 product(bool, NeverTenure, false, \
1396 "Never tenure objects in eden, May tenure on overflow " \
1397 "(ParallelGC only)") \
1398 \
1399 product(bool, ScavengeBeforeFullGC, true, \
1400 "Scavenge youngest generation before each full GC, " \
1401 "used with UseParallelGC") \
1402 \
1403 develop(bool, ScavengeWithObjectsInToSpace, false, \
1404 "Allow scavenges to occur when to_space contains objects.") \
1405 \
1406 product(bool, UseConcMarkSweepGC, false, \
1407 "Use Concurrent Mark-Sweep GC in the old generation") \
1408 \
1409 product(bool, ExplicitGCInvokesConcurrent, false, \
1410 "A System.gc() request invokes a concurrent collection;" \
1411 " (effective only when UseConcMarkSweepGC)") \
1412 \
1413 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1414 "A System.gc() request invokes a concurrent collection and " \
1415 "also unloads classes during such a concurrent gc cycle " \
1416 "(effective only when UseConcMarkSweepGC)") \
1417 \
1418 product(bool, GCLockerInvokesConcurrent, false, \
1419 "The exit of a JNI CS necessitating a scavenge also" \
1420 " kicks off a bkgrd concurrent collection") \
1421 \
1422 product(uintx, GCLockerEdenExpansionPercent, 5, \
1423 "How much the GC can expand the eden by while the GC locker " \
1424 "is active (as a percentage)") \
1425 \
1426 diagnostic(intx, GCLockerRetryAllocationCount, 2, \
1427 "Number of times to retry allocations when" \
1428 " blocked by the GC locker") \
1429 \
1430 develop(bool, UseCMSAdaptiveFreeLists, true, \
1431 "Use Adaptive Free Lists in the CMS generation") \
1432 \
1433 develop(bool, UseAsyncConcMarkSweepGC, true, \
1434 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1435 \
1436 develop(bool, RotateCMSCollectionTypes, false, \
1437 "Rotate the CMS collections among concurrent and STW") \
1438 \
1439 product(bool, UseCMSBestFit, true, \
1440 "Use CMS best fit allocation strategy") \
1441 \
1442 product(bool, UseCMSCollectionPassing, true, \
1443 "Use passing of collection from background to foreground") \
1444 \
1445 product(bool, UseParNewGC, false, \
1446 "Use parallel threads in the new generation.") \
1447 \
1448 product(bool, ParallelGCVerbose, false, \
1449 "Verbose output for parallel GC.") \
1450 \
1451 product(uintx, ParallelGCBufferWastePct, 10, \
1452 "Wasted fraction of parallel allocation buffer.") \
1453 \
1454 diagnostic(bool, ParallelGCRetainPLAB, false, \
1455 "Retain parallel allocation buffers across scavenges; " \
1456 " -- disabled because this currently conflicts with " \
1457 " parallel card scanning under certain conditions ") \
1458 \
1459 product(uintx, TargetPLABWastePct, 10, \
1460 "Target wasted space in last buffer as percent of overall " \
1461 "allocation") \
1462 \
1463 product(uintx, PLABWeight, 75, \
1464 "Percentage (0-100) used to weight the current sample when" \
1465 "computing exponentially decaying average for ResizePLAB.") \
1466 \
1467 product(bool, ResizePLAB, true, \
1468 "Dynamically resize (survivor space) promotion labs") \
1469 \
1470 product(bool, PrintPLAB, false, \
1471 "Print (survivor space) promotion labs sizing decisions") \
1472 \
1473 product(intx, ParGCArrayScanChunk, 50, \
1474 "Scan a subset and push remainder, if array is bigger than this") \
1475 \
1476 product(bool, ParGCUseLocalOverflow, false, \
1477 "Instead of a global overflow list, use local overflow stacks") \
1478 \
1479 product(bool, ParGCTrimOverflow, true, \
1480 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \
1481 \
1482 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1483 "Whether we should simulate work queue overflow in ParNew") \
1484 \
1485 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1486 "An `interval' counter that determines how frequently " \
1487 "we simulate overflow; a smaller number increases frequency") \
1488 \
1489 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1490 "The desired number of objects to claim from the overflow list") \
1491 \
1492 diagnostic(uintx, ParGCStridesPerThread, 2, \
1493 "The number of strides per worker thread that we divide up the " \
1494 "card table scanning work into") \
1495 \
1496 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \
1497 "The number of cards in each chunk of the parallel chunks used " \
1498 "during card table scanning") \
1499 \
1500 product(uintx, CMSParPromoteBlocksToClaim, 16, \
1501 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1502 "parallel GC.") \
1503 \
1504 product(uintx, OldPLABWeight, 50, \
1505 "Percentage (0-100) used to weight the current sample when" \
1506 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \
1507 \
1508 product(bool, ResizeOldPLAB, true, \
1509 "Dynamically resize (old gen) promotion labs") \
1510 \
1511 product(bool, PrintOldPLAB, false, \
1512 "Print (old gen) promotion labs sizing decisions") \
1513 \
1514 product(uintx, CMSOldPLABMin, 16, \
1515 "Min size of CMS gen promotion lab caches per worker per blksize")\
1516 \
1517 product(uintx, CMSOldPLABMax, 1024, \
1518 "Max size of CMS gen promotion lab caches per worker per blksize")\
1519 \
1520 product(uintx, CMSOldPLABNumRefills, 4, \
1521 "Nominal number of refills of CMS gen promotion lab cache" \
1522 " per worker per block size") \
1523 \
1524 product(bool, CMSOldPLABResizeQuicker, false, \
1525 "Whether to react on-the-fly during a scavenge to a sudden" \
1526 " change in block demand rate") \
1527 \
1528 product(uintx, CMSOldPLABToleranceFactor, 4, \
1529 "The tolerance of the phase-change detector for on-the-fly" \
1530 " PLAB resizing during a scavenge") \
1531 \
1532 product(uintx, CMSOldPLABReactivityFactor, 2, \
1533 "The gain in the feedback loop for on-the-fly PLAB resizing" \
1534 " during a scavenge") \
1535 \
1536 product(bool, AlwaysPreTouch, false, \
1537 "It forces all freshly committed pages to be pre-touched.") \
1538 \
1539 product_pd(uintx, CMSYoungGenPerWorker, \
1540 "The maximum size of young gen chosen by default per GC worker " \
1541 "thread available") \
1542 \
1543 product(bool, CMSIncrementalMode, false, \
1544 "Whether CMS GC should operate in \"incremental\" mode") \
1545 \
1546 product(uintx, CMSIncrementalDutyCycle, 10, \
1547 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1548 "CMSIncrementalPacing is enabled, then this is just the initial" \
1549 "value") \
1550 \
1551 product(bool, CMSIncrementalPacing, true, \
1552 "Whether the CMS incremental mode duty cycle should be " \
1553 "automatically adjusted") \
1554 \
1555 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1556 "Lower bound on the duty cycle when CMSIncrementalPacing is " \
1557 "enabled (a percentage, 0-100)") \
1558 \
1559 product(uintx, CMSIncrementalSafetyFactor, 10, \
1560 "Percentage (0-100) used to add conservatism when computing the " \
1561 "duty cycle") \
1562 \
1563 product(uintx, CMSIncrementalOffset, 0, \
1564 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1565 " is shifted to the right within the period between young GCs") \
1566 \
1567 product(uintx, CMSExpAvgFactor, 50, \
1568 "Percentage (0-100) used to weight the current sample when" \
1569 "computing exponential averages for CMS statistics.") \
1570 \
1571 product(uintx, CMS_FLSWeight, 75, \
1572 "Percentage (0-100) used to weight the current sample when" \
1573 "computing exponentially decating averages for CMS FLS statistics.") \
1574 \
1575 product(uintx, CMS_FLSPadding, 1, \
1576 "The multiple of deviation from mean to use for buffering" \
1577 "against volatility in free list demand.") \
1578 \
1579 product(uintx, FLSCoalescePolicy, 2, \
1580 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1581 \
1582 product(bool, FLSAlwaysCoalesceLarge, false, \
1583 "CMS: Larger free blocks are always available for coalescing") \
1584 \
1585 product(double, FLSLargestBlockCoalesceProximity, 0.99, \
1586 "CMS: the smaller the percentage the greater the coalition force")\
1587 \
1588 product(double, CMSSmallCoalSurplusPercent, 1.05, \
1589 "CMS: the factor by which to inflate estimated demand of small" \
1590 " block sizes to prevent coalescing with an adjoining block") \
1591 \
1592 product(double, CMSLargeCoalSurplusPercent, 0.95, \
1593 "CMS: the factor by which to inflate estimated demand of large" \
1594 " block sizes to prevent coalescing with an adjoining block") \
1595 \
1596 product(double, CMSSmallSplitSurplusPercent, 1.10, \
1597 "CMS: the factor by which to inflate estimated demand of small" \
1598 " block sizes to prevent splitting to supply demand for smaller" \
1599 " blocks") \
1600 \
1601 product(double, CMSLargeSplitSurplusPercent, 1.00, \
1602 "CMS: the factor by which to inflate estimated demand of large" \
1603 " block sizes to prevent splitting to supply demand for smaller" \
1604 " blocks") \
1605 \
1606 product(bool, CMSExtrapolateSweep, false, \
1607 "CMS: cushion for block demand during sweep") \
1608 \
1609 product(uintx, CMS_SweepWeight, 75, \
1610 "Percentage (0-100) used to weight the current sample when " \
1611 "computing exponentially decaying average for inter-sweep " \
1612 "duration") \
1613 \
1614 product(uintx, CMS_SweepPadding, 1, \
1615 "The multiple of deviation from mean to use for buffering " \
1616 "against volatility in inter-sweep duration.") \
1617 \
1618 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1619 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1620 "duration exceeds this threhold in milliseconds") \
1621 \
1622 develop(bool, CMSTraceIncrementalMode, false, \
1623 "Trace CMS incremental mode") \
1624 \
1625 develop(bool, CMSTraceIncrementalPacing, false, \
1626 "Trace CMS incremental mode pacing computation") \
1627 \
1628 develop(bool, CMSTraceThreadState, false, \
1629 "Trace the CMS thread state (enable the trace_state() method)") \
1630 \
1631 product(bool, CMSClassUnloadingEnabled, true, \
1632 "Whether class unloading enabled when using CMS GC") \
1633 \
1634 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1635 "When CMS class unloading is enabled, the maximum CMS cycle count"\
1636 " for which classes may not be unloaded") \
1637 \
1638 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1639 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1640 \
1641 product(bool, UseCMSCompactAtFullCollection, true, \
1642 "Use mark sweep compact at full collections") \
1643 \
1644 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1645 "Number of CMS full collection done before compaction if > 0") \
1646 \
1647 develop(intx, CMSDictionaryChoice, 0, \
1648 "Use BinaryTreeDictionary as default in the CMS generation") \
1649 \
1650 product(uintx, CMSIndexedFreeListReplenish, 4, \
1651 "Replenish an indexed free list with this number of chunks") \
1652 \
1653 product(bool, CMSReplenishIntermediate, true, \
1654 "Replenish all intermediate free-list caches") \
1655 \
1656 product(bool, CMSSplitIndexedFreeListBlocks, true, \
1657 "When satisfying batched demand, split blocks from the " \
1658 "IndexedFreeList whose size is a multiple of requested size") \
1659 \
1660 product(bool, CMSLoopWarn, false, \
1661 "Warn in case of excessive CMS looping") \
1662 \
1663 develop(bool, CMSOverflowEarlyRestoration, false, \
1664 "Whether preserved marks should be restored early") \
1665 \
1666 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1667 "Size of marking stack") \
1668 \
1669 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1670 "Max size of marking stack") \
1671 \
1672 notproduct(bool, CMSMarkStackOverflowALot, false, \
1673 "Whether we should simulate frequent marking stack / work queue" \
1674 " overflow") \
1675 \
1676 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1677 "An `interval' counter that determines how frequently" \
1678 " we simulate overflow; a smaller number increases frequency") \
1679 \
1680 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1681 "(Temporary, subject to experimentation)" \
1682 "Maximum number of abortable preclean iterations, if > 0") \
1683 \
1684 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1685 "(Temporary, subject to experimentation)" \
1686 "Maximum time in abortable preclean in ms") \
1687 \
1688 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1689 "(Temporary, subject to experimentation)" \
1690 "Nominal minimum work per abortable preclean iteration") \
1691 \
1692 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
1693 "(Temporary, subject to experimentation)" \
1694 " Time that we sleep between iterations when not given" \
1695 " enough work per iteration") \
1696 \
1697 product(uintx, CMSRescanMultiple, 32, \
1698 "Size (in cards) of CMS parallel rescan task") \
1699 \
1700 product(uintx, CMSConcMarkMultiple, 32, \
1701 "Size (in cards) of CMS concurrent MT marking task") \
1702 \
1703 product(bool, CMSAbortSemantics, false, \
1704 "Whether abort-on-overflow semantics is implemented") \
1705 \
1706 product(bool, CMSParallelInitialMarkEnabled, true, \
1707 "Use the parallel initial mark.") \
1708 \
1709 product(bool, CMSParallelRemarkEnabled, true, \
1710 "Whether parallel remark enabled (only if ParNewGC)") \
1711 \
1712 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1713 "Whether parallel remark of survivor space" \
1714 " enabled (effective only if CMSParallelRemarkEnabled)") \
1715 \
1716 product(bool, CMSPLABRecordAlways, true, \
1717 "Whether to always record survivor space PLAB bdries" \
1718 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1719 \
1720 product(bool, CMSEdenChunksRecordAlways, true, \
1721 "Whether to always record eden chunks used for " \
1722 "the parallel initial mark or remark of eden" ) \
1723 \
1724 product(bool, CMSPrintEdenSurvivorChunks, false, \
1725 "Print the eden and the survivor chunks used for the parallel " \
1726 "initial mark or remark of the eden/survivor spaces") \
1727 \
1728 product(bool, CMSConcurrentMTEnabled, true, \
1729 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1730 \
1731 product(bool, CMSPrecleaningEnabled, true, \
1732 "Whether concurrent precleaning enabled") \
1733 \
1734 product(uintx, CMSPrecleanIter, 3, \
1735 "Maximum number of precleaning iteration passes") \
1736 \
1737 product(uintx, CMSPrecleanNumerator, 2, \
1738 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1739 " ratio") \
1740 \
1741 product(uintx, CMSPrecleanDenominator, 3, \
1742 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1743 " ratio") \
1744 \
1745 product(bool, CMSPrecleanRefLists1, true, \
1746 "Preclean ref lists during (initial) preclean phase") \
1747 \
1748 product(bool, CMSPrecleanRefLists2, false, \
1749 "Preclean ref lists during abortable preclean phase") \
1750 \
1751 product(bool, CMSPrecleanSurvivors1, false, \
1752 "Preclean survivors during (initial) preclean phase") \
1753 \
1754 product(bool, CMSPrecleanSurvivors2, true, \
1755 "Preclean survivors during abortable preclean phase") \
1756 \
1757 product(uintx, CMSPrecleanThreshold, 1000, \
1758 "Don't re-iterate if #dirty cards less than this") \
1759 \
1760 product(bool, CMSCleanOnEnter, true, \
1761 "Clean-on-enter optimization for reducing number of dirty cards") \
1762 \
1763 product(uintx, CMSRemarkVerifyVariant, 1, \
1764 "Choose variant (1,2) of verification following remark") \
1765 \
1766 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1767 "If Eden used is below this value, don't try to schedule remark") \
1768 \
1769 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1770 "The Eden occupancy % at which to try and schedule remark pause") \
1771 \
1772 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1773 "Start sampling Eden top at least before yg occupancy reaches" \
1774 " 1/<ratio> of the size at which we plan to schedule remark") \
1775 \
1776 product(uintx, CMSSamplingGrain, 16*K, \
1777 "The minimum distance between eden samples for CMS (see above)") \
1778 \
1779 product(bool, CMSScavengeBeforeRemark, false, \
1780 "Attempt scavenge before the CMS remark step") \
1781 \
1782 develop(bool, CMSTraceSweeper, false, \
1783 "Trace some actions of the CMS sweeper") \
1784 \
1785 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1786 "Don't drain below this size per parallel worker/thief") \
1787 \
1788 manageable(intx, CMSWaitDuration, 2000, \
1789 "Time in milliseconds that CMS thread waits for young GC") \
1790 \
1791 develop(uintx, CMSCheckInterval, 1000, \
1792 "Interval in milliseconds that CMS thread checks if it " \
1793 "should start a collection cycle") \
1794 \
1795 product(bool, CMSYield, true, \
1796 "Yield between steps of concurrent mark & sweep") \
1797 \
1798 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1799 "Bitmap operations should process at most this many bits" \
1800 "between yields") \
1801 \
1802 product(bool, CMSDumpAtPromotionFailure, false, \
1803 "Dump useful information about the state of the CMS old " \
1804 " generation upon a promotion failure.") \
1805 \
1806 product(bool, CMSPrintChunksInDump, false, \
1807 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1808 " more detailed information about the free chunks.") \
1809 \
1810 product(bool, CMSPrintObjectsInDump, false, \
1811 "In a dump enabled by CMSDumpAtPromotionFailure, include " \
1812 " more detailed information about the allocated objects.") \
1813 \
1814 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1815 "Verify that all refs across the FLS boundary " \
1816 " are to valid objects") \
1817 \
1818 diagnostic(bool, FLSVerifyLists, false, \
1819 "Do lots of (expensive) FreeListSpace verification") \
1820 \
1821 diagnostic(bool, FLSVerifyIndexTable, false, \
1822 "Do lots of (expensive) FLS index table verification") \
1823 \
1824 develop(bool, FLSVerifyDictionary, false, \
1825 "Do lots of (expensive) FLS dictionary verification") \
1826 \
1827 develop(bool, VerifyBlockOffsetArray, false, \
1828 "Do (expensive!) block offset array verification") \
1829 \
1830 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
1831 "Maintain _unallocated_block in BlockOffsetArray" \
1832 " (currently applicable only to CMS collector)") \
1833 \
1834 develop(bool, TraceCMSState, false, \
1835 "Trace the state of the CMS collection") \
1836 \
1837 product(intx, RefDiscoveryPolicy, 0, \
1838 "Whether reference-based(0) or referent-based(1)") \
1839 \
1840 product(bool, ParallelRefProcEnabled, false, \
1841 "Enable parallel reference processing whenever possible") \
1842 \
1843 product(bool, ParallelRefProcBalancingEnabled, true, \
1844 "Enable balancing of reference processing queues") \
1845 \
1846 product(uintx, CMSTriggerRatio, 80, \
1847 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1848 "allocated before a CMS collection cycle commences") \
1849 \
1850 product(uintx, CMSBootstrapOccupancy, 50, \
1851 "Percentage CMS generation occupancy at which to " \
1852 "initiate CMS collection for bootstrapping collection stats") \
1853 \
1854 product(intx, CMSInitiatingOccupancyFraction, -1, \
1855 "Percentage CMS generation occupancy to start a CMS collection " \
1856 "cycle. A negative value means that CMSTriggerRatio is used") \
1857 \
1858 product(uintx, InitiatingHeapOccupancyPercent, 45, \
1859 "Percentage of the (entire) heap occupancy to start a " \
1860 "concurrent GC cycle. It is used by GCs that trigger a " \
1861 "concurrent GC cycle based on the occupancy of the entire heap, " \
1862 "not just one of the generations (e.g., G1). A value of 0 " \
1863 "denotes 'do constant GC cycles'.") \
1864 \
1865 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1866 "Only use occupancy as a crierion for starting a CMS collection") \
1867 \
1868 product(uintx, CMSIsTooFullPercentage, 98, \
1869 "An absolute ceiling above which CMS will always consider the " \
1870 "unloading of classes when class unloading is enabled") \
1871 \
1872 develop(bool, CMSTestInFreeList, false, \
1873 "Check if the coalesced range is already in the " \
1874 "free lists as claimed") \
1875 \
1876 notproduct(bool, CMSVerifyReturnedBytes, false, \
1877 "Check that all the garbage collected was returned to the " \
1878 "free lists.") \
1879 \
1880 notproduct(bool, ScavengeALot, false, \
1881 "Force scavenge at every Nth exit from the runtime system " \
1882 "(N=ScavengeALotInterval)") \
1883 \
1884 develop(bool, FullGCALot, false, \
1885 "Force full gc at every Nth exit from the runtime system " \
1886 "(N=FullGCALotInterval)") \
1887 \
1888 notproduct(bool, GCALotAtAllSafepoints, false, \
1889 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1890 \
1891 product(bool, PrintPromotionFailure, false, \
1892 "Print additional diagnostic information following " \
1893 " promotion failure") \
1894 \
1895 notproduct(bool, PromotionFailureALot, false, \
1896 "Use promotion failure handling on every youngest generation " \
1897 "collection") \
1898 \
1899 develop(uintx, PromotionFailureALotCount, 1000, \
1900 "Number of promotion failures occurring at ParGCAllocBuffer" \
1901 "refill attempts (ParNew) or promotion attempts " \
1902 "(other young collectors) ") \
1903 \
1904 develop(uintx, PromotionFailureALotInterval, 5, \
1905 "Total collections between promotion failures alot") \
1906 \
1907 experimental(uintx, WorkStealingSleepMillis, 1, \
1908 "Sleep time when sleep is used for yields") \
1909 \
1910 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \
1911 "Number of yields before a sleep is done during workstealing") \
1912 \
1913 experimental(uintx, WorkStealingHardSpins, 4096, \
1914 "Number of iterations in a spin loop between checks on " \
1915 "time out of hard spin") \
1916 \
1917 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \
1918 "Ratio of hard spins to calls to yield") \
1919 \
1920 develop(uintx, ObjArrayMarkingStride, 512, \
1921 "Number of ObjArray elements to push onto the marking stack" \
1922 "before pushing a continuation entry") \
1923 \
1924 develop(bool, MetadataAllocationFailALot, false, \
1925 "Fail metadata allocations at intervals controlled by " \
1926 "MetadataAllocationFailALotInterval") \
1927 \
1928 develop(uintx, MetadataAllocationFailALotInterval, 1000, \
1929 "metadata allocation failure alot interval") \
1930 \
1931 develop(bool, MetaDataDeallocateALot, false, \
1932 "Deallocation bunches of metadata at intervals controlled by " \
1933 "MetaDataAllocateALotInterval") \
1934 \
1935 develop(uintx, MetaDataDeallocateALotInterval, 100, \
1936 "Metadata deallocation alot interval") \
1937 \
1938 develop(bool, TraceMetadataChunkAllocation, false, \
1939 "Trace chunk metadata allocations") \
1940 \
1941 product(bool, TraceMetadataHumongousAllocation, false, \
1942 "Trace humongous metadata allocations") \
1943 \
1944 develop(bool, TraceMetavirtualspaceAllocation, false, \
1945 "Trace virtual space metadata allocations") \
1946 \
1947 notproduct(bool, ExecuteInternalVMTests, false, \
1948 "Enable execution of internal VM tests.") \
1949 \
1950 notproduct(bool, VerboseInternalVMTests, false, \
1951 "Turn on logging for internal VM tests.") \
1952 \
1953 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
1954 \
1955 product_pd(bool, ResizeTLAB, \
1956 "Dynamically resize tlab size for threads") \
1957 \
1958 product(bool, ZeroTLAB, false, \
1959 "Zero out the newly created TLAB") \
1960 \
1961 product(bool, FastTLABRefill, true, \
1962 "Use fast TLAB refill code") \
1963 \
1964 product(bool, PrintTLAB, false, \
1965 "Print various TLAB related information") \
1966 \
1967 product(bool, TLABStats, true, \
1968 "Print various TLAB related information") \
1969 \
1970 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \
1971 "Enable LowMemoryProtection")) \
1972 \
1973 product_pd(bool, NeverActAsServerClassMachine, \
1974 "Never act like a server-class machine") \
1975 \
1976 product(bool, AlwaysActAsServerClassMachine, false, \
1977 "Always act like a server-class machine") \
1978 \
1979 product_pd(uint64_t, MaxRAM, \
1980 "Real memory size (in bytes) used to set maximum heap size") \
1981 \
1982 product(uintx, ErgoHeapSizeLimit, 0, \
1983 "Maximum ergonomically set heap size (in bytes); zero means use " \
1984 "MaxRAM / MaxRAMFraction") \
1985 \
1986 product(uintx, MaxRAMFraction, 4, \
1987 "Maximum fraction (1/n) of real memory used for maximum heap " \
1988 "size") \
1989 \
1990 product(uintx, DefaultMaxRAMFraction, 4, \
1991 "Maximum fraction (1/n) of real memory used for maximum heap " \
1992 "size; deprecated: to be renamed to MaxRAMFraction") \
1993 \
1994 product(uintx, MinRAMFraction, 2, \
1995 "Minimum fraction (1/n) of real memory used for maxmimum heap " \
1996 "size on systems with small physical memory size") \
1997 \
1998 product(uintx, InitialRAMFraction, 64, \
1999 "Fraction (1/n) of real memory used for initial heap size") \
2000 \
2001 develop(uintx, MaxVirtMemFraction, 2, \
2002 "Maximum fraction (1/n) of virtual memory used for ergonomically" \
2003 "determining maximum heap size") \
2004 \
2005 product(bool, UseAutoGCSelectPolicy, false, \
2006 "Use automatic collection selection policy") \
2007 \
2008 product(uintx, AutoGCSelectPauseMillis, 5000, \
2009 "Automatic GC selection pause threshhold in ms") \
2010 \
2011 product(bool, UseAdaptiveSizePolicy, true, \
2012 "Use adaptive generation sizing policies") \
2013 \
2014 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
2015 "Use adaptive survivor sizing policies") \
2016 \
2017 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
2018 "Use adaptive young-old sizing policies at minor collections") \
2019 \
2020 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
2021 "Use adaptive young-old sizing policies at major collections") \
2022 \
2023 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
2024 "Use statistics from System.GC for adaptive size policy") \
2025 \
2026 product(bool, UseAdaptiveGCBoundary, false, \
2027 "Allow young-old boundary to move") \
2028 \
2029 develop(bool, TraceAdaptiveGCBoundary, false, \
2030 "Trace young-old boundary moves") \
2031 \
2032 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
2033 "Resize the virtual spaces of the young or old generations") \
2034 \
2035 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
2036 "Policy for changeing generation size for throughput goals") \
2037 \
2038 product(uintx, AdaptiveSizePausePolicy, 0, \
2039 "Policy for changing generation size for pause goals") \
2040 \
2041 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
2042 "Adjust tenured generation to achive a minor pause goal") \
2043 \
2044 develop(bool, PSAdjustYoungGenForMajorPause, false, \
2045 "Adjust young generation to achive a major pause goal") \
2046 \
2047 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
2048 "Number of steps where heuristics is used before data is used") \
2049 \
2050 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
2051 "Number of collections before the adaptive sizing is started") \
2052 \
2053 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
2054 "Collection interval for printing information; zero means never") \
2055 \
2056 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
2057 "Use adaptive minimum footprint as a goal") \
2058 \
2059 product(uintx, AdaptiveSizePolicyWeight, 10, \
2060 "Weight given to exponential resizing, between 0 and 100") \
2061 \
2062 product(uintx, AdaptiveTimeWeight, 25, \
2063 "Weight given to time in adaptive policy, between 0 and 100") \
2064 \
2065 product(uintx, PausePadding, 1, \
2066 "How much buffer to keep for pause time") \
2067 \
2068 product(uintx, PromotedPadding, 3, \
2069 "How much buffer to keep for promotion failure") \
2070 \
2071 product(uintx, SurvivorPadding, 3, \
2072 "How much buffer to keep for survivor overflow") \
2073 \
2074 product(uintx, ThresholdTolerance, 10, \
2075 "Allowed collection cost difference between generations") \
2076 \
2077 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
2078 "If collection costs are within margin, reduce both by full " \
2079 "delta") \
2080 \
2081 product(uintx, YoungGenerationSizeIncrement, 20, \
2082 "Adaptive size percentage change in young generation") \
2083 \
2084 product(uintx, YoungGenerationSizeSupplement, 80, \
2085 "Supplement to YoungedGenerationSizeIncrement used at startup") \
2086 \
2087 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
2088 "Decay factor to YoungedGenerationSizeSupplement") \
2089 \
2090 product(uintx, TenuredGenerationSizeIncrement, 20, \
2091 "Adaptive size percentage change in tenured generation") \
2092 \
2093 product(uintx, TenuredGenerationSizeSupplement, 80, \
2094 "Supplement to TenuredGenerationSizeIncrement used at startup") \
2095 \
2096 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
2097 "Decay factor to TenuredGenerationSizeIncrement") \
2098 \
2099 product(uintx, MaxGCPauseMillis, max_uintx, \
2100 "Adaptive size policy maximum GC pause time goal in msec, " \
2101 "or (G1 Only) the max. GC time per MMU time slice") \
2102 \
2103 product(uintx, GCPauseIntervalMillis, 0, \
2104 "Time slice for MMU specification") \
2105 \
2106 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
2107 "Adaptive size policy maximum GC minor pause time goal in msec") \
2108 \
2109 product(uintx, GCTimeRatio, 99, \
2110 "Adaptive size policy application time to GC time ratio") \
2111 \
2112 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
2113 "Adaptive size scale down factor for shrinking") \
2114 \
2115 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
2116 "Adaptive size decays the major cost for long major intervals") \
2117 \
2118 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
2119 "Time scale over which major costs decay") \
2120 \
2121 product(uintx, MinSurvivorRatio, 3, \
2122 "Minimum ratio of young generation/survivor space size") \
2123 \
2124 product(uintx, InitialSurvivorRatio, 8, \
2125 "Initial ratio of eden/survivor space size") \
2126 \
2127 product(uintx, BaseFootPrintEstimate, 256*M, \
2128 "Estimate of footprint other than Java Heap") \
2129 \
2130 product(bool, UseGCOverheadLimit, true, \
2131 "Use policy to limit of proportion of time spent in GC " \
2132 "before an OutOfMemory error is thrown") \
2133 \
2134 product(uintx, GCTimeLimit, 98, \
2135 "Limit of proportion of time spent in GC before an OutOfMemory" \
2136 "error is thrown (used with GCHeapFreeLimit)") \
2137 \
2138 product(uintx, GCHeapFreeLimit, 2, \
2139 "Minimum percentage of free space after a full GC before an " \
2140 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
2141 \
2142 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
2143 "Number of consecutive collections before gc time limit fires") \
2144 \
2145 product(bool, PrintAdaptiveSizePolicy, false, \
2146 "Print information about AdaptiveSizePolicy") \
2147 \
2148 product(intx, PrefetchCopyIntervalInBytes, -1, \
2149 "How far ahead to prefetch destination area (<= 0 means off)") \
2150 \
2151 product(intx, PrefetchScanIntervalInBytes, -1, \
2152 "How far ahead to prefetch scan area (<= 0 means off)") \
2153 \
2154 product(intx, PrefetchFieldsAhead, -1, \
2155 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
2156 \
2157 diagnostic(bool, VerifySilently, false, \
2158 "Don't print print the verification progress") \
2159 \
2160 diagnostic(bool, VerifyDuringStartup, false, \
2161 "Verify memory system before executing any Java code " \
2162 "during VM initialization") \
2163 \
2164 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
2165 "Verify system before exiting") \
2166 \
2167 diagnostic(bool, VerifyBeforeGC, false, \
2168 "Verify memory system before GC") \
2169 \
2170 diagnostic(bool, VerifyAfterGC, false, \
2171 "Verify memory system after GC") \
2172 \
2173 diagnostic(bool, VerifyDuringGC, false, \
2174 "Verify memory system during GC (between phases)") \
2175 \
2176 diagnostic(bool, GCParallelVerificationEnabled, true, \
2177 "Enable parallel memory system verification") \
2178 \
2179 diagnostic(bool, DeferInitialCardMark, false, \
2180 "When +ReduceInitialCardMarks, explicitly defer any that " \
2181 "may arise from new_pre_store_barrier") \
2182 \
2183 diagnostic(bool, VerifyRememberedSets, false, \
2184 "Verify GC remembered sets") \
2185 \
2186 diagnostic(bool, VerifyObjectStartArray, true, \
2187 "Verify GC object start array if verify before/after") \
2188 \
2189 product(bool, DisableExplicitGC, false, \
2190 "Tells whether calling System.gc() does a full GC") \
2191 \
2192 notproduct(bool, CheckMemoryInitialization, false, \
2193 "Checks memory initialization") \
2194 \
2195 product(bool, CollectGen0First, false, \
2196 "Collect youngest generation before each full GC") \
2197 \
2198 diagnostic(bool, BindCMSThreadToCPU, false, \
2199 "Bind CMS Thread to CPU if possible") \
2200 \
2201 diagnostic(uintx, CPUForCMSThread, 0, \
2202 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
2203 \
2204 product(bool, BindGCTaskThreadsToCPUs, false, \
2205 "Bind GCTaskThreads to CPUs if possible") \
2206 \
2207 product(bool, UseGCTaskAffinity, false, \
2208 "Use worker affinity when asking for GCTasks") \
2209 \
2210 product(uintx, ProcessDistributionStride, 4, \
2211 "Stride through processors when distributing processes") \
2212 \
2213 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
2214 "number of times the coordinator GC thread will sleep while " \
2215 "yielding before giving up and resuming GC") \
2216 \
2217 product(uintx, CMSYieldSleepCount, 0, \
2218 "number of times a GC thread (minus the coordinator) " \
2219 "will sleep while yielding before giving up and resuming GC") \
2220 \
2221 /* gc tracing */ \
2222 manageable(bool, PrintGC, false, \
2223 "Print message at garbage collect") \
2224 \
2225 manageable(bool, PrintGCDetails, false, \
2226 "Print more details at garbage collect") \
2227 \
2228 manageable(bool, PrintGCDateStamps, false, \
2229 "Print date stamps at garbage collect") \
2230 \
2231 manageable(bool, PrintGCTimeStamps, false, \
2232 "Print timestamps at garbage collect") \
2233 \
2234 product(bool, PrintGCTaskTimeStamps, false, \
2235 "Print timestamps for individual gc worker thread tasks") \
2236 \
2237 develop(intx, ConcGCYieldTimeout, 0, \
2238 "If non-zero, assert that GC threads yield within this # of ms.") \
2239 \
2240 notproduct(bool, TraceMarkSweep, false, \
2241 "Trace mark sweep") \
2242 \
2243 product(bool, PrintReferenceGC, false, \
2244 "Print times spent handling reference objects during GC " \
2245 " (enabled only when PrintGCDetails)") \
2246 \
2247 develop(bool, TraceReferenceGC, false, \
2248 "Trace handling of soft/weak/final/phantom references") \
2249 \
2250 develop(bool, TraceFinalizerRegistration, false, \
2251 "Trace registration of final references") \
2252 \
2253 notproduct(bool, TraceScavenge, false, \
2254 "Trace scavenge") \
2255 \
2256 product_rw(bool, TraceClassLoading, false, \
2257 "Trace all classes loaded") \
2258 \
2259 product(bool, TraceClassLoadingPreorder, false, \
2260 "Trace all classes loaded in order referenced (not loaded)") \
2261 \
2262 product_rw(bool, TraceClassUnloading, false, \
2263 "Trace unloading of classes") \
2264 \
2265 product_rw(bool, TraceLoaderConstraints, false, \
2266 "Trace loader constraints") \
2267 \
2268 develop(bool, TraceClassLoaderData, false, \
2269 "Trace class loader loader_data lifetime") \
2270 \
2271 product(uintx, InitialBootClassLoaderMetaspaceSize, \
2272 NOT_LP64(2200*K) LP64_ONLY(4*M), \
2273 "Initial size of the boot class loader data metaspace") \
2274 \
2275 product(bool, TraceGen0Time, false, \
2276 "Trace accumulated time for Gen 0 collection") \
2277 \
2278 product(bool, TraceGen1Time, false, \
2279 "Trace accumulated time for Gen 1 collection") \
2280 \
2281 product(bool, PrintTenuringDistribution, false, \
2282 "Print tenuring age information") \
2283 \
2284 product_rw(bool, PrintHeapAtGC, false, \
2285 "Print heap layout before and after each GC") \
2286 \
2287 product_rw(bool, PrintHeapAtGCExtended, false, \
2288 "Prints extended information about the layout of the heap " \
2289 "when -XX:+PrintHeapAtGC is set") \
2290 \
2291 product(bool, PrintHeapAtSIGBREAK, true, \
2292 "Print heap layout in response to SIGBREAK") \
2293 \
2294 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
2295 "Print a class histogram before any major stop-world GC") \
2296 \
2297 manageable(bool, PrintClassHistogramAfterFullGC, false, \
2298 "Print a class histogram after any major stop-world GC") \
2299 \
2300 manageable(bool, PrintClassHistogram, false, \
2301 "Print a histogram of class instances") \
2302 \
2303 develop(bool, TraceWorkGang, false, \
2304 "Trace activities of work gangs") \
2305 \
2306 product(bool, TraceParallelOldGCTasks, false, \
2307 "Trace multithreaded GC activity") \
2308 \
2309 develop(bool, TraceBlockOffsetTable, false, \
2310 "Print BlockOffsetTable maps") \
2311 \
2312 develop(bool, TraceCardTableModRefBS, false, \
2313 "Print CardTableModRefBS maps") \
2314 \
2315 develop(bool, TraceGCTaskManager, false, \
2316 "Trace actions of the GC task manager") \
2317 \
2318 develop(bool, TraceGCTaskQueue, false, \
2319 "Trace actions of the GC task queues") \
2320 \
2321 diagnostic(bool, TraceGCTaskThread, false, \
2322 "Trace actions of the GC task threads") \
2323 \
2324 product(bool, PrintParallelOldGCPhaseTimes, false, \
2325 "Print the time taken by each parallel old gc phase." \
2326 "PrintGCDetails must also be enabled.") \
2327 \
2328 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2329 "Trace parallel old gc marking phase") \
2330 \
2331 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2332 "Trace parallel old gc summary phase") \
2333 \
2334 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2335 "Trace parallel old gc compaction phase") \
2336 \
2337 develop(bool, TraceParallelOldGCDensePrefix, false, \
2338 "Trace parallel old gc dense prefix computation") \
2339 \
2340 develop(bool, IgnoreLibthreadGPFault, false, \
2341 "Suppress workaround for libthread GP fault") \
2342 \
2343 product(bool, PrintJNIGCStalls, false, \
2344 "Print diagnostic message when GC is stalled" \
2345 "by JNI critical section") \
2346 \
2347 experimental(double, ObjectCountCutOffPercent, 0.5, \
2348 "The percentage of the used heap that the instances of a class " \
2349 "must occupy for the class to generate a trace event.") \
2350 \
2351 /* GC log rotation setting */ \
2352 \
2353 product(bool, UseGCLogFileRotation, false, \
2354 "Prevent large gclog file for long running app. " \
2355 "Requires -Xloggc:<filename>") \
2356 \
2357 product(uintx, NumberOfGCLogFiles, 0, \
2358 "Number of gclog files in rotation, " \
2359 "Default: 0, no rotation") \
2360 \
2361 product(uintx, GCLogFileSize, 0, \
2362 "GC log file size, Default: 0 bytes, no rotation " \
2363 "Only valid with UseGCLogFileRotation") \
2364 \
2365 /* JVMTI heap profiling */ \
2366 \
2367 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2368 "Trace JVMTI object tagging calls") \
2369 \
2370 diagnostic(bool, VerifyBeforeIteration, false, \
2371 "Verify memory system before JVMTI iteration") \
2372 \
2373 /* compiler interface */ \
2374 \
2375 develop(bool, CIPrintCompilerName, false, \
2376 "when CIPrint is active, print the name of the active compiler") \
2377 \
2378 develop(bool, CIPrintCompileQueue, false, \
2379 "display the contents of the compile queue whenever a " \
2380 "compilation is enqueued") \
2381 \
2382 develop(bool, CIPrintRequests, false, \
2383 "display every request for compilation") \
2384 \
2385 product(bool, CITime, false, \
2386 "collect timing information for compilation") \
2387 \
2388 develop(bool, CITimeEach, false, \
2389 "display timing information after each successful compilation") \
2390 \
2391 develop(bool, CICountOSR, false, \
2392 "use a separate counter when assigning ids to osr compilations") \
2393 \
2394 develop(bool, CICompileNatives, true, \
2395 "compile native methods if supported by the compiler") \
2396 \
2397 develop_pd(bool, CICompileOSR, \
2398 "compile on stack replacement methods if supported by the " \
2399 "compiler") \
2400 \
2401 develop(bool, CIPrintMethodCodes, false, \
2402 "print method bytecodes of the compiled code") \
2403 \
2404 develop(bool, CIPrintTypeFlow, false, \
2405 "print the results of ciTypeFlow analysis") \
2406 \
2407 develop(bool, CITraceTypeFlow, false, \
2408 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2409 \
2410 develop(intx, OSROnlyBCI, -1, \
2411 "OSR only at this bci. Negative values mean exclude that bci") \
2412 \
2413 /* compiler */ \
2414 \
2415 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2416 "Number of compiler threads to run") \
2417 \
2418 product(intx, CompilationPolicyChoice, 0, \
2419 "which compilation policy (0/1)") \
2420 \
2421 develop(bool, UseStackBanging, true, \
2422 "use stack banging for stack overflow checks (required for " \
2423 "proper StackOverflow handling; disable only to measure cost " \
2424 "of stackbanging)") \
2425 \
2426 develop(bool, UseStrictFP, true, \
2427 "use strict fp if modifier strictfp is set") \
2428 \
2429 develop(bool, GenerateSynchronizationCode, true, \
2430 "generate locking/unlocking code for synchronized methods and " \
2431 "monitors") \
2432 \
2433 develop(bool, GenerateCompilerNullChecks, true, \
2434 "Generate explicit null checks for loads/stores/calls") \
2435 \
2436 develop(bool, GenerateRangeChecks, true, \
2437 "Generate range checks for array accesses") \
2438 \
2439 develop_pd(bool, ImplicitNullChecks, \
2440 "generate code for implicit null checks") \
2441 \
2442 product(bool, PrintSafepointStatistics, false, \
2443 "print statistics about safepoint synchronization") \
2444 \
2445 product(intx, PrintSafepointStatisticsCount, 300, \
2446 "total number of safepoint statistics collected " \
2447 "before printing them out") \
2448 \
2449 product(intx, PrintSafepointStatisticsTimeout, -1, \
2450 "print safepoint statistics only when safepoint takes" \
2451 " more than PrintSafepointSatisticsTimeout in millis") \
2452 \
2453 product(bool, TraceSafepointCleanupTime, false, \
2454 "print the break down of clean up tasks performed during" \
2455 " safepoint") \
2456 \
2457 product(bool, Inline, true, \
2458 "enable inlining") \
2459 \
2460 product(bool, ClipInlining, true, \
2461 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2462 \
2463 develop(bool, UseCHA, true, \
2464 "enable CHA") \
2465 \
2466 product(bool, UseTypeProfile, true, \
2467 "Check interpreter profile for historically monomorphic calls") \
2468 \
2469 notproduct(bool, TimeCompiler, false, \
2470 "time the compiler") \
2471 \
2472 diagnostic(bool, PrintInlining, false, \
2473 "prints inlining optimizations") \
2474 \
2475 product(bool, UsePopCountInstruction, false, \
2476 "Use population count instruction") \
2477 \
2478 develop(bool, EagerInitialization, false, \
2479 "Eagerly initialize classes if possible") \
2480 \
2481 develop(bool, TraceMethodReplacement, false, \
2482 "Print when methods are replaced do to recompilation") \
2483 \
2484 develop(bool, PrintMethodFlushing, false, \
2485 "print the nmethods being flushed") \
2486 \
2487 develop(bool, UseRelocIndex, false, \
2488 "use an index to speed random access to relocations") \
2489 \
2490 develop(bool, StressCodeBuffers, false, \
2491 "Exercise code buffer expansion and other rare state changes") \
2492 \
2493 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2494 "Generate extra debugging info for non-safepoints in nmethods") \
2495 \
2496 product(bool, PrintVMOptions, false, \
2497 "Print flags that appeared on the command line") \
2498 \
2499 product(bool, IgnoreUnrecognizedVMOptions, false, \
2500 "Ignore unrecognized VM options") \
2501 \
2502 product(bool, PrintCommandLineFlags, false, \
2503 "Print flags specified on command line or set by ergonomics") \
2504 \
2505 product(bool, PrintFlagsInitial, false, \
2506 "Print all VM flags before argument processing and exit VM") \
2507 \
2508 product(bool, PrintFlagsFinal, false, \
2509 "Print all VM flags after argument and ergonomic processing") \
2510 \
2511 notproduct(bool, PrintFlagsWithComments, false, \
2512 "Print all VM flags with default values and descriptions and exit")\
2513 \
2514 diagnostic(bool, SerializeVMOutput, true, \
2515 "Use a mutex to serialize output to tty and hotspot.log") \
2516 \
2517 diagnostic(bool, DisplayVMOutput, true, \
2518 "Display all VM output on the tty, independently of LogVMOutput") \
2519 \
2520 diagnostic(bool, LogVMOutput, trueInDebug, \
2521 "Save VM output to hotspot.log, or to LogFile") \
2522 \
2523 diagnostic(ccstr, LogFile, NULL, \
2524 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2525 \
2526 product(ccstr, ErrorFile, NULL, \
2527 "If an error occurs, save the error data to this file " \
2528 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2529 \
2530 product(bool, DisplayVMOutputToStderr, false, \
2531 "If DisplayVMOutput is true, display all VM output to stderr") \
2532 \
2533 product(bool, DisplayVMOutputToStdout, false, \
2534 "If DisplayVMOutput is true, display all VM output to stdout") \
2535 \
2536 product(bool, UseHeavyMonitors, false, \
2537 "use heavyweight instead of lightweight Java monitors") \
2538 \
2539 product(bool, PrintStringTableStatistics, false, \
2540 "print statistics about the StringTable and SymbolTable") \
2541 \
2542 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2543 "print histogram of the symbol table") \
2544 \
2545 notproduct(bool, ExitVMOnVerifyError, false, \
2546 "standard exit from VM if bytecode verify error " \
2547 "(only in debug mode)") \
2548 \
2549 notproduct(ccstr, AbortVMOnException, NULL, \
2550 "Call fatal if this exception is thrown. Example: " \
2551 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2552 \
2553 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
2554 "Call fatal if the exception pointed by AbortVMOnException " \
2555 "has this message.") \
2556 \
2557 develop(bool, DebugVtables, false, \
2558 "add debugging code to vtable dispatch") \
2559 \
2560 develop(bool, PrintVtables, false, \
2561 "print vtables when printing klass") \
2562 \
2563 notproduct(bool, PrintVtableStats, false, \
2564 "print vtables stats at end of run") \
2565 \
2566 develop(bool, TraceCreateZombies, false, \
2567 "trace creation of zombie nmethods") \
2568 \
2569 notproduct(bool, IgnoreLockingAssertions, false, \
2570 "disable locking assertions (for speed)") \
2571 \
2572 product(bool, RangeCheckElimination, true, \
2573 "Eliminate range checks") \
2574 \
2575 develop_pd(bool, UncommonNullCast, \
2576 "track occurrences of null in casts; adjust compiler tactics") \
2577 \
2578 develop(bool, TypeProfileCasts, true, \
2579 "treat casts like calls for purposes of type profiling") \
2580 \
2581 develop(bool, DelayCompilationDuringStartup, true, \
2582 "Delay invoking the compiler until main application class is " \
2583 "loaded") \
2584 \
2585 develop(bool, CompileTheWorld, false, \
2586 "Compile all methods in all classes in bootstrap class path " \
2587 "(stress test)") \
2588 \
2589 develop(bool, CompileTheWorldPreloadClasses, true, \
2590 "Preload all classes used by a class before start loading") \
2591 \
2592 notproduct(intx, CompileTheWorldSafepointInterval, 100, \
2593 "Force a safepoint every n compiles so sweeper can keep up") \
2594 \
2595 develop(bool, FillDelaySlots, true, \
2596 "Fill delay slots (on SPARC only)") \
2597 \
2598 develop(bool, TimeLivenessAnalysis, false, \
2599 "Time computation of bytecode liveness analysis") \
2600 \
2601 develop(bool, TraceLivenessGen, false, \
2602 "Trace the generation of liveness analysis information") \
2603 \
2604 notproduct(bool, TraceLivenessQuery, false, \
2605 "Trace queries of liveness analysis information") \
2606 \
2607 notproduct(bool, CollectIndexSetStatistics, false, \
2608 "Collect information about IndexSets") \
2609 \
2610 develop(bool, UseLoopSafepoints, true, \
2611 "Generate Safepoint nodes in every loop") \
2612 \
2613 develop(intx, FastAllocateSizeLimit, 128*K, \
2614 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2615 "Inline allocations larger than this in doublewords must go slow")\
2616 \
2617 product(bool, AggressiveOpts, false, \
2618 "Enable aggressive optimizations - see arguments.cpp") \
2619 \
2620 /* statistics */ \
2621 develop(bool, CountCompiledCalls, false, \
2622 "counts method invocations") \
2623 \
2624 notproduct(bool, CountRuntimeCalls, false, \
2625 "counts VM runtime calls") \
2626 \
2627 develop(bool, CountJNICalls, false, \
2628 "counts jni method invocations") \
2629 \
2630 notproduct(bool, CountJVMCalls, false, \
2631 "counts jvm method invocations") \
2632 \
2633 notproduct(bool, CountRemovableExceptions, false, \
2634 "count exceptions that could be replaced by branches due to " \
2635 "inlining") \
2636 \
2637 notproduct(bool, ICMissHistogram, false, \
2638 "produce histogram of IC misses") \
2639 \
2640 notproduct(bool, PrintClassStatistics, false, \
2641 "prints class statistics at end of run") \
2642 \
2643 notproduct(bool, PrintMethodStatistics, false, \
2644 "prints method statistics at end of run") \
2645 \
2646 /* interpreter */ \
2647 develop(bool, ClearInterpreterLocals, false, \
2648 "Always clear local variables of interpreter activations upon " \
2649 "entry") \
2650 \
2651 product_pd(bool, RewriteBytecodes, \
2652 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2653 \
2654 product_pd(bool, RewriteFrequentPairs, \
2655 "Rewrite frequently used bytecode pairs into a single bytecode") \
2656 \
2657 diagnostic(bool, PrintInterpreter, false, \
2658 "Prints the generated interpreter code") \
2659 \
2660 product(bool, UseInterpreter, true, \
2661 "Use interpreter for non-compiled methods") \
2662 \
2663 develop(bool, UseFastSignatureHandlers, true, \
2664 "Use fast signature handlers for native calls") \
2665 \
2666 product(bool, UseLoopCounter, true, \
2667 "Increment invocation counter on backward branch") \
2668 \
2669 product(bool, UseFastEmptyMethods, true, \
2670 "Use fast method entry code for empty methods") \
2671 \
2672 product(bool, UseFastAccessorMethods, true, \
2673 "Use fast method entry code for accessor methods") \
2674 \
2675 product_pd(bool, UseOnStackReplacement, \
2676 "Use on stack replacement, calls runtime if invoc. counter " \
2677 "overflows in loop") \
2678 \
2679 notproduct(bool, TraceOnStackReplacement, false, \
2680 "Trace on stack replacement") \
2681 \
2682 product_pd(bool, PreferInterpreterNativeStubs, \
2683 "Use always interpreter stubs for native methods invoked via " \
2684 "interpreter") \
2685 \
2686 develop(bool, CountBytecodes, false, \
2687 "Count number of bytecodes executed") \
2688 \
2689 develop(bool, PrintBytecodeHistogram, false, \
2690 "Print histogram of the executed bytecodes") \
2691 \
2692 develop(bool, PrintBytecodePairHistogram, false, \
2693 "Print histogram of the executed bytecode pairs") \
2694 \
2695 diagnostic(bool, PrintSignatureHandlers, false, \
2696 "Print code generated for native method signature handlers") \
2697 \
2698 develop(bool, VerifyOops, false, \
2699 "Do plausibility checks for oops") \
2700 \
2701 develop(bool, CheckUnhandledOops, false, \
2702 "Check for unhandled oops in VM code") \
2703 \
2704 develop(bool, VerifyJNIFields, trueInDebug, \
2705 "Verify jfieldIDs for instance fields") \
2706 \
2707 notproduct(bool, VerifyJNIEnvThread, false, \
2708 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2709 "from JNI") \
2710 \
2711 develop(bool, VerifyFPU, false, \
2712 "Verify FPU state (check for NaN's, etc.)") \
2713 \
2714 develop(bool, VerifyThread, false, \
2715 "Watch the thread register for corruption (SPARC only)") \
2716 \
2717 develop(bool, VerifyActivationFrameSize, false, \
2718 "Verify that activation frame didn't become smaller than its " \
2719 "minimal size") \
2720 \
2721 develop(bool, TraceFrequencyInlining, false, \
2722 "Trace frequency based inlining") \
2723 \
2724 develop_pd(bool, InlineIntrinsics, \
2725 "Inline intrinsics that can be statically resolved") \
2726 \
2727 product_pd(bool, ProfileInterpreter, \
2728 "Profile at the bytecode level during interpretation") \
2729 \
2730 develop(bool, TraceProfileInterpreter, false, \
2731 "Trace profiling at the bytecode level during interpretation. " \
2732 "This outputs the profiling information collected to improve " \
2733 "jit compilation.") \
2734 \
2735 develop_pd(bool, ProfileTraps, \
2736 "Profile deoptimization traps at the bytecode level") \
2737 \
2738 product(intx, ProfileMaturityPercentage, 20, \
2739 "number of method invocations/branches (expressed as % of " \
2740 "CompileThreshold) before using the method's profile") \
2741 \
2742 develop(bool, PrintMethodData, false, \
2743 "Print the results of +ProfileInterpreter at end of run") \
2744 \
2745 develop(bool, VerifyDataPointer, trueInDebug, \
2746 "Verify the method data pointer during interpreter profiling") \
2747 \
2748 develop(bool, VerifyCompiledCode, false, \
2749 "Include miscellaneous runtime verifications in nmethod code; " \
2750 "default off because it disturbs nmethod size heuristics") \
2751 \
2752 notproduct(bool, CrashGCForDumpingJavaThread, false, \
2753 "Manually make GC thread crash then dump java stack trace; " \
2754 "Test only") \
2755 \
2756 /* compilation */ \
2757 product(bool, UseCompiler, true, \
2758 "use compilation") \
2759 \
2760 develop(bool, TraceCompilationPolicy, false, \
2761 "Trace compilation policy") \
2762 \
2763 develop(bool, TimeCompilationPolicy, false, \
2764 "Time the compilation policy") \
2765 \
2766 product(bool, UseCounterDecay, true, \
2767 "adjust recompilation counters") \
2768 \
2769 develop(intx, CounterHalfLifeTime, 30, \
2770 "half-life time of invocation counters (in secs)") \
2771 \
2772 develop(intx, CounterDecayMinIntervalLength, 500, \
2773 "Min. ms. between invocation of CounterDecay") \
2774 \
2775 product(bool, AlwaysCompileLoopMethods, false, \
2776 "when using recompilation, never interpret methods " \
2777 "containing loops") \
2778 \
2779 product(bool, DontCompileHugeMethods, true, \
2780 "don't compile methods > HugeMethodLimit") \
2781 \
2782 /* Bytecode escape analysis estimation. */ \
2783 product(bool, EstimateArgEscape, true, \
2784 "Analyze bytecodes to estimate escape state of arguments") \
2785 \
2786 product(intx, BCEATraceLevel, 0, \
2787 "How much tracing to do of bytecode escape analysis estimates") \
2788 \
2789 product(intx, MaxBCEAEstimateLevel, 5, \
2790 "Maximum number of nested calls that are analyzed by BC EA.") \
2791 \
2792 product(intx, MaxBCEAEstimateSize, 150, \
2793 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2794 \
2795 product(intx, AllocatePrefetchStyle, 1, \
2796 "0 = no prefetch, " \
2797 "1 = prefetch instructions for each allocation, " \
2798 "2 = use TLAB watermark to gate allocation prefetch, " \
2799 "3 = use BIS instruction on Sparc for allocation prefetch") \
2800 \
2801 product(intx, AllocatePrefetchDistance, -1, \
2802 "Distance to prefetch ahead of allocation pointer") \
2803 \
2804 product(intx, AllocatePrefetchLines, 3, \
2805 "Number of lines to prefetch ahead of array allocation pointer") \
2806 \
2807 product(intx, AllocateInstancePrefetchLines, 1, \
2808 "Number of lines to prefetch ahead of instance allocation pointer") \
2809 \
2810 product(intx, AllocatePrefetchStepSize, 16, \
2811 "Step size in bytes of sequential prefetch instructions") \
2812 \
2813 product(intx, AllocatePrefetchInstr, 0, \
2814 "Prefetch instruction to prefetch ahead of allocation pointer") \
2815 \
2816 /* deoptimization */ \
2817 develop(bool, TraceDeoptimization, false, \
2818 "Trace deoptimization") \
2819 \
2820 develop(bool, DebugDeoptimization, false, \
2821 "Tracing various information while debugging deoptimization") \
2822 \
2823 product(intx, SelfDestructTimer, 0, \
2824 "Will cause VM to terminate after a given time (in minutes) " \
2825 "(0 means off)") \
2826 \
2827 product(intx, MaxJavaStackTraceDepth, 1024, \
2828 "Max. no. of lines in the stack trace for Java exceptions " \
2829 "(0 means all)") \
2830 \
2831 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
2832 "Guarantee a safepoint (at least) every so many milliseconds " \
2833 "(0 means none)")) \
2834 \
2835 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \
2836 "Guarantee a safepoint (at least) every so many milliseconds " \
2837 "(0 means none)")) \
2838 \
2839 product(intx, SafepointTimeoutDelay, 10000, \
2840 "Delay in milliseconds for option SafepointTimeout") \
2841 \
2842 product(intx, NmethodSweepFraction, 16, \
2843 "Number of invocations of sweeper to cover all nmethods") \
2844 \
2845 product(intx, NmethodSweepCheckInterval, 5, \
2846 "Compilers wake up every n seconds to possibly sweep nmethods") \
2847 \
2848 notproduct(bool, LogSweeper, false, \
2849 "Keep a ring buffer of sweeper activity") \
2850 \
2851 notproduct(intx, SweeperLogEntries, 1024, \
2852 "Number of records in the ring buffer of sweeper activity") \
2853 \
2854 notproduct(intx, MemProfilingInterval, 500, \
2855 "Time between each invocation of the MemProfiler") \
2856 \
2857 develop(intx, MallocCatchPtr, -1, \
2858 "Hit breakpoint when mallocing/freeing this pointer") \
2859 \
2860 notproduct(intx, AssertRepeat, 1, \
2861 "number of times to evaluate expression in assert " \
2862 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2863 \
2864 notproduct(ccstrlist, SuppressErrorAt, "", \
2865 "List of assertions (file:line) to muzzle") \
2866 \
2867 notproduct(uintx, HandleAllocationLimit, 1024, \
2868 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2869 "is used") \
2870 \
2871 develop(uintx, TotalHandleAllocationLimit, 1024, \
2872 "Threshold for total handle allocation when " \
2873 "+TraceHandleAllocation is used") \
2874 \
2875 develop(intx, StackPrintLimit, 100, \
2876 "number of stack frames to print in VM-level stack dump") \
2877 \
2878 notproduct(intx, MaxElementPrintSize, 256, \
2879 "maximum number of elements to print") \
2880 \
2881 notproduct(intx, MaxSubklassPrintSize, 4, \
2882 "maximum number of subklasses to print when printing klass") \
2883 \
2884 product(intx, MaxInlineLevel, 9, \
2885 "maximum number of nested calls that are inlined") \
2886 \
2887 product(intx, MaxRecursiveInlineLevel, 1, \
2888 "maximum number of nested recursive calls that are inlined") \
2889 \
2890 product_pd(intx, InlineSmallCode, \
2891 "Only inline already compiled methods if their code size is " \
2892 "less than this") \
2893 \
2894 product(intx, MaxInlineSize, 35, \
2895 "maximum bytecode size of a method to be inlined") \
2896 \
2897 product_pd(intx, FreqInlineSize, \
2898 "maximum bytecode size of a frequent method to be inlined") \
2899 \
2900 product(intx, MaxTrivialSize, 6, \
2901 "maximum bytecode size of a trivial method to be inlined") \
2902 \
2903 product(intx, MinInliningThreshold, 250, \
2904 "min. invocation count a method needs to have to be inlined") \
2905 \
2906 develop(intx, MethodHistogramCutoff, 100, \
2907 "cutoff value for method invoc. histogram (+CountCalls)") \
2908 \
2909 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
2910 "# of interpreted methods to show in profile") \
2911 \
2912 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
2913 "# of compiled methods to show in profile") \
2914 \
2915 develop(intx, ProfilerNumberOfStubMethods, 25, \
2916 "# of stub methods to show in profile") \
2917 \
2918 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
2919 "# of runtime stub nodes to show in profile") \
2920 \
2921 product(intx, ProfileIntervalsTicks, 100, \
2922 "# of ticks between printing of interval profile " \
2923 "(+ProfileIntervals)") \
2924 \
2925 notproduct(intx, ScavengeALotInterval, 1, \
2926 "Interval between which scavenge will occur with +ScavengeALot") \
2927 \
2928 notproduct(intx, FullGCALotInterval, 1, \
2929 "Interval between which full gc will occur with +FullGCALot") \
2930 \
2931 notproduct(intx, FullGCALotStart, 0, \
2932 "For which invocation to start FullGCAlot") \
2933 \
2934 notproduct(intx, FullGCALotDummies, 32*K, \
2935 "Dummy object allocated with +FullGCALot, forcing all objects " \
2936 "to move") \
2937 \
2938 develop(intx, DontYieldALotInterval, 10, \
2939 "Interval between which yields will be dropped (milliseconds)") \
2940 \
2941 develop(intx, MinSleepInterval, 1, \
2942 "Minimum sleep() interval (milliseconds) when " \
2943 "ConvertSleepToYield is off (used for SOLARIS)") \
2944 \
2945 develop(intx, ProfilerPCTickThreshold, 15, \
2946 "Number of ticks in a PC buckets to be a hotspot") \
2947 \
2948 notproduct(intx, DeoptimizeALotInterval, 5, \
2949 "Number of exits until DeoptimizeALot kicks in") \
2950 \
2951 notproduct(intx, ZombieALotInterval, 5, \
2952 "Number of exits until ZombieALot kicks in") \
2953 \
2954 develop(bool, StressNonEntrant, false, \
2955 "Mark nmethods non-entrant at registration") \
2956 \
2957 diagnostic(intx, MallocVerifyInterval, 0, \
2958 "if non-zero, verify C heap after every N calls to " \
2959 "malloc/realloc/free") \
2960 \
2961 diagnostic(intx, MallocVerifyStart, 0, \
2962 "if non-zero, start verifying C heap after Nth call to " \
2963 "malloc/realloc/free") \
2964 \
2965 diagnostic(uintx, MallocMaxTestWords, 0, \
2966 "if non-zero, max # of Words that malloc/realloc can allocate " \
2967 "(for testing only)") \
2968 \
2969 product(intx, TypeProfileWidth, 2, \
2970 "number of receiver types to record in call/cast profile") \
2971 \
2972 develop(intx, BciProfileWidth, 2, \
2973 "number of return bci's to record in ret profile") \
2974 \
2975 product(intx, PerMethodRecompilationCutoff, 400, \
2976 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
2977 \
2978 product(intx, PerBytecodeRecompilationCutoff, 200, \
2979 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
2980 \
2981 product(intx, PerMethodTrapLimit, 100, \
2982 "Limit on traps (of one kind) in a method (includes inlines)") \
2983 \
2984 product(intx, PerBytecodeTrapLimit, 4, \
2985 "Limit on traps (of one kind) at a particular BCI") \
2986 \
2987 develop(intx, InlineFrequencyRatio, 20, \
2988 "Ratio of call site execution to caller method invocation") \
2989 \
2990 develop_pd(intx, InlineFrequencyCount, \
2991 "Count of call site execution necessary to trigger frequent " \
2992 "inlining") \
2993 \
2994 develop(intx, InlineThrowCount, 50, \
2995 "Force inlining of interpreted methods that throw this often") \
2996 \
2997 develop(intx, InlineThrowMaxSize, 200, \
2998 "Force inlining of throwing methods smaller than this") \
2999 \
3000 develop(intx, ProfilerNodeSize, 1024, \
3001 "Size in K to allocate for the Profile Nodes of each thread") \
3002 \
3003 product_pd(intx, PreInflateSpin, \
3004 "Number of times to spin wait before inflation") \
3005 \
3006 /* gc parameters */ \
3007 product(uintx, InitialHeapSize, 0, \
3008 "Initial heap size (in bytes); zero means use ergonomics") \
3009 \
3010 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \
3011 "Maximum heap size (in bytes)") \
3012 \
3013 product(uintx, OldSize, ScaleForWordSize(4*M), \
3014 "Initial tenured generation size (in bytes)") \
3015 \
3016 product(uintx, NewSize, ScaleForWordSize(1*M), \
3017 "Initial new generation size (in bytes)") \
3018 \
3019 product(uintx, MaxNewSize, max_uintx, \
3020 "Maximum new generation size (in bytes), max_uintx means set " \
3021 "ergonomically") \
3022 \
3023 product(uintx, PretenureSizeThreshold, 0, \
3024 "Maximum size in bytes of objects allocated in DefNew " \
3025 "generation; zero means no maximum") \
3026 \
3027 product(uintx, TLABSize, 0, \
3028 "Starting TLAB size (in bytes); zero means set ergonomically") \
3029 \
3030 product(uintx, MinTLABSize, 2*K, \
3031 "Minimum allowed TLAB size (in bytes)") \
3032 \
3033 product(uintx, TLABAllocationWeight, 35, \
3034 "Allocation averaging weight") \
3035 \
3036 product(uintx, TLABWasteTargetPercent, 1, \
3037 "Percentage of Eden that can be wasted") \
3038 \
3039 product(uintx, TLABRefillWasteFraction, 64, \
3040 "Max TLAB waste at a refill (internal fragmentation)") \
3041 \
3042 product(uintx, TLABWasteIncrement, 4, \
3043 "Increment allowed waste at slow allocation") \
3044 \
3045 product(uintx, SurvivorRatio, 8, \
3046 "Ratio of eden/survivor space size") \
3047 \
3048 product(uintx, NewRatio, 2, \
3049 "Ratio of new/old generation sizes") \
3050 \
3051 product_pd(uintx, NewSizeThreadIncrease, \
3052 "Additional size added to desired new generation size per " \
3053 "non-daemon thread (in bytes)") \
3054 \
3055 product_pd(uintx, MetaspaceSize, \
3056 "Initial size of Metaspaces (in bytes)") \
3057 \
3058 product(uintx, MaxMetaspaceSize, max_uintx, \
3059 "Maximum size of Metaspaces (in bytes)") \
3060 \
3061 product(uintx, ClassMetaspaceSize, 1*G, \
3062 "Maximum size of InstanceKlass area in Metaspace used for " \
3063 "UseCompressedKlassPointers") \
3064 \
3065 product(uintx, MinHeapFreeRatio, 40, \
3066 "Min percentage of heap free after GC to avoid expansion") \
3067 \
3068 product(uintx, MaxHeapFreeRatio, 70, \
3069 "Max percentage of heap free after GC to avoid shrinking") \
3070 \
3071 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
3072 "Number of milliseconds per MB of free space in the heap") \
3073 \
3074 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
3075 "Min change in heap space due to GC (in bytes)") \
3076 \
3077 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
3078 "Min expansion of Metaspace (in bytes)") \
3079 \
3080 product(uintx, MinMetaspaceFreeRatio, 40, \
3081 "Min percentage of Metaspace free after GC to avoid expansion") \
3082 \
3083 product(uintx, MaxMetaspaceFreeRatio, 70, \
3084 "Max percentage of Metaspace free after GC to avoid shrinking") \
3085 \
3086 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
3087 "Max expansion of Metaspace without full GC (in bytes)") \
3088 \
3089 product(uintx, QueuedAllocationWarningCount, 0, \
3090 "Number of times an allocation that queues behind a GC " \
3091 "will retry before printing a warning") \
3092 \
3093 diagnostic(uintx, VerifyGCStartAt, 0, \
3094 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
3095 \
3096 diagnostic(intx, VerifyGCLevel, 0, \
3097 "Generation level at which to start +VerifyBefore/AfterGC") \
3098 \
3099 product(uintx, MaxTenuringThreshold, 15, \
3100 "Maximum value for tenuring threshold") \
3101 \
3102 product(uintx, InitialTenuringThreshold, 7, \
3103 "Initial value for tenuring threshold") \
3104 \
3105 product(uintx, TargetSurvivorRatio, 50, \
3106 "Desired percentage of survivor space used after scavenge") \
3107 \
3108 product(uintx, MarkSweepDeadRatio, 5, \
3109 "Percentage (0-100) of the old gen allowed as dead wood." \
3110 "Serial mark sweep treats this as both the min and max value." \
3111 "CMS uses this value only if it falls back to mark sweep." \
3112 "Par compact uses a variable scale based on the density of the" \
3113 "generation and treats this as the max value when the heap is" \
3114 "either completely full or completely empty. Par compact also" \
3115 "has a smaller default value; see arguments.cpp.") \
3116 \
3117 product(uintx, MarkSweepAlwaysCompactCount, 4, \
3118 "How often should we fully compact the heap (ignoring the dead " \
3119 "space parameters)") \
3120 \
3121 product(intx, PrintCMSStatistics, 0, \
3122 "Statistics for CMS") \
3123 \
3124 product(bool, PrintCMSInitiationStatistics, false, \
3125 "Statistics for initiating a CMS collection") \
3126 \
3127 product(intx, PrintFLSStatistics, 0, \
3128 "Statistics for CMS' FreeListSpace") \
3129 \
3130 product(intx, PrintFLSCensus, 0, \
3131 "Census for CMS' FreeListSpace") \
3132 \
3133 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
3134 "Delay in ms between expansion and allocation") \
3135 \
3136 develop(uintx, GCWorkerDelayMillis, 0, \
3137 "Delay in ms in scheduling GC workers") \
3138 \
3139 product(intx, DeferThrSuspendLoopCount, 4000, \
3140 "(Unstable) Number of times to iterate in safepoint loop " \
3141 " before blocking VM threads ") \
3142 \
3143 product(intx, DeferPollingPageLoopCount, -1, \
3144 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
3145 "before changing safepoint polling page to RO ") \
3146 \
3147 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
3148 \
3149 product(bool, PSChunkLargeArrays, true, \
3150 "true: process large arrays in chunks") \
3151 \
3152 product(uintx, GCDrainStackTargetSize, 64, \
3153 "how many entries we'll try to leave on the stack during " \
3154 "parallel GC") \
3155 \
3156 /* stack parameters */ \
3157 product_pd(intx, StackYellowPages, \
3158 "Number of yellow zone (recoverable overflows) pages") \
3159 \
3160 product_pd(intx, StackRedPages, \
3161 "Number of red zone (unrecoverable overflows) pages") \
3162 \
3163 product_pd(intx, StackShadowPages, \
3164 "Number of shadow zone (for overflow checking) pages" \
3165 " this should exceed the depth of the VM and native call stack") \
3166 \
3167 product_pd(intx, ThreadStackSize, \
3168 "Thread Stack Size (in Kbytes)") \
3169 \
3170 product_pd(intx, VMThreadStackSize, \
3171 "Non-Java Thread Stack Size (in Kbytes)") \
3172 \
3173 product_pd(intx, CompilerThreadStackSize, \
3174 "Compiler Thread Stack Size (in Kbytes)") \
3175 \
3176 develop_pd(uintx, JVMInvokeMethodSlack, \
3177 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
3178 \
3179 product(uintx, ThreadSafetyMargin, 50*M, \
3180 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
3181 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
3182 "disable this feature") \
3183 \
3184 /* code cache parameters */ \
3185 /* ppc64 has large code-entry alignment. */ \
3186 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64), \
3187 "Code cache segment size (in bytes) - smallest unit of " \
3188 "allocation") \
3189 \
3190 develop_pd(intx, CodeEntryAlignment, \
3191 "Code entry alignment for generated code (in bytes)") \
3192 \
3193 product_pd(intx, OptoLoopAlignment, \
3194 "Align inner loops to zero relative to this modulus") \
3195 \
3196 product_pd(uintx, InitialCodeCacheSize, \
3197 "Initial code cache size (in bytes)") \
3198 \
3199 develop_pd(uintx, CodeCacheMinimumUseSpace, \
3200 "Minimum code cache size (in bytes) required to start VM.") \
3201 \
3202 product_pd(uintx, ReservedCodeCacheSize, \
3203 "Reserved code cache size (in bytes) - maximum code cache size") \
3204 \
3205 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
3206 "When less than X space left, we stop compiling.") \
3207 \
3208 product_pd(uintx, CodeCacheExpansionSize, \
3209 "Code cache expansion size (in bytes)") \
3210 \
3211 develop_pd(uintx, CodeCacheMinBlockLength, \
3212 "Minimum number of segments in a code cache block.") \
3213 \
3214 notproduct(bool, ExitOnFullCodeCache, false, \
3215 "Exit the VM if we fill the code cache.") \
3216 \
3217 product(bool, UseCodeCacheFlushing, true, \
3218 "Attempt to clean the code cache before shutting off compiler") \
3219 \
3220 product(intx, MinCodeCacheFlushingInterval, 30, \
3221 "Min number of seconds between code cache cleaning sessions") \
3222 \
3223 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \
3224 "When less than X space left, start code cache cleaning") \
3225 \
3226 product(uintx, CodeCacheFlushingFraction, 2, \
3227 "Fraction of the code cache that is flushed when full") \
3228 \
3229 /* interpreter debugging */ \
3230 develop(intx, BinarySwitchThreshold, 5, \
3231 "Minimal number of lookupswitch entries for rewriting to binary " \
3232 "switch") \
3233 \
3234 develop(intx, StopInterpreterAt, 0, \
3235 "Stops interpreter execution at specified bytecode number") \
3236 \
3237 develop(intx, TraceBytecodesAt, 0, \
3238 "Traces bytecodes starting with specified bytecode number") \
3239 \
3240 /* compiler interface */ \
3241 develop(intx, CIStart, 0, \
3242 "the id of the first compilation to permit") \
3243 \
3244 develop(intx, CIStop, -1, \
3245 "the id of the last compilation to permit") \
3246 \
3247 develop(intx, CIStartOSR, 0, \
3248 "the id of the first osr compilation to permit " \
3249 "(CICountOSR must be on)") \
3250 \
3251 develop(intx, CIStopOSR, -1, \
3252 "the id of the last osr compilation to permit " \
3253 "(CICountOSR must be on)") \
3254 \
3255 develop(intx, CIBreakAtOSR, -1, \
3256 "id of osr compilation to break at") \
3257 \
3258 develop(intx, CIBreakAt, -1, \
3259 "id of compilation to break at") \
3260 \
3261 product(ccstrlist, CompileOnly, "", \
3262 "List of methods (pkg/class.name) to restrict compilation to") \
3263 \
3264 product(ccstr, CompileCommandFile, NULL, \
3265 "Read compiler commands from this file [.hotspot_compiler]") \
3266 \
3267 product(ccstrlist, CompileCommand, "", \
3268 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3269 \
3270 develop(bool, ReplayCompiles, false, \
3271 "Enable replay of compilations from ReplayDataFile") \
3272 \
3273 product(ccstr, ReplayDataFile, NULL, \
3274 "File containing compilation replay information" \
3275 "[default: ./replay_pid%p.log] (%p replaced with pid)") \
3276 \
3277 develop(intx, ReplaySuppressInitializers, 2, \
3278 "Controls handling of class initialization during replay" \
3279 "0 - don't do anything special" \
3280 "1 - treat all class initializers as empty" \
3281 "2 - treat class initializers for application classes as empty" \
3282 "3 - allow all class initializers to run during bootstrap but" \
3283 " pretend they are empty after starting replay") \
3284 \
3285 develop(bool, ReplayIgnoreInitErrors, false, \
3286 "Ignore exceptions thrown during initialization for replay") \
3287 \
3288 product(bool, DumpReplayDataOnError, true, \
3289 "Record replay data for crashing compiler threads") \
3290 \
3291 product(bool, CICompilerCountPerCPU, false, \
3292 "1 compiler thread for log(N CPUs)") \
3293 \
3294 develop(intx, CIFireOOMAt, -1, \
3295 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3296 "(non-negative value throws OOM after this many CI accesses " \
3297 "in each compile)") \
3298 notproduct(intx, CICrashAt, -1, \
3299 "id of compilation to trigger assert in compiler thread for " \
3300 "the purpose of testing, e.g. generation of replay data") \
3301 notproduct(bool, CIObjectFactoryVerify, false, \
3302 "enable potentially expensive verification in ciObjectFactory") \
3303 \
3304 /* Priorities */ \
3305 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3306 \
3307 product(intx, ThreadPriorityPolicy, 0, \
3308 "0 : Normal. "\
3309 " VM chooses priorities that are appropriate for normal "\
3310 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3311 " to normal native priority. Java priorities below NORM_PRIORITY"\
3312 " map to lower native priority values. On Windows applications"\
3313 " are allowed to use higher native priorities. However, with "\
3314 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
3315 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
3316 " interfere with system threads. On Linux thread priorities "\
3317 " are ignored because the OS does not support static priority "\
3318 " in SCHED_OTHER scheduling class which is the only choice for"\
3319 " non-root, non-realtime applications. "\
3320 "1 : Aggressive. "\
3321 " Java thread priorities map over to the entire range of "\
3322 " native thread priorities. Higher Java thread priorities map "\
3323 " to higher native thread priorities. This policy should be "\
3324 " used with care, as sometimes it can cause performance "\
3325 " degradation in the application and/or the entire system. On "\
3326 " Linux this policy requires root privilege.") \
3327 \
3328 product(bool, ThreadPriorityVerbose, false, \
3329 "Print priority changes") \
3330 \
3331 product(intx, DefaultThreadPriority, -1, \
3332 "The native priority at which threads run if not elsewhere " \
3333 "specified (-1 means no change)") \
3334 \
3335 product(intx, CompilerThreadPriority, -1, \
3336 "The native priority at which compiler threads should run " \
3337 "(-1 means no change)") \
3338 \
3339 product(intx, VMThreadPriority, -1, \
3340 "The native priority at which the VM thread should run " \
3341 "(-1 means no change)") \
3342 \
3343 product(bool, CompilerThreadHintNoPreempt, true, \
3344 "(Solaris only) Give compiler threads an extra quanta") \
3345 \
3346 product(bool, VMThreadHintNoPreempt, false, \
3347 "(Solaris only) Give VM thread an extra quanta") \
3348 \
3349 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3350 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3351 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3352 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3353 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3354 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3355 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3356 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3357 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3358 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3359 \
3360 experimental(bool, UseCriticalJavaThreadPriority, false, \
3361 "Java thread priority 10 maps to critical scheduling priority") \
3362 \
3363 experimental(bool, UseCriticalCompilerThreadPriority, false, \
3364 "Compiler thread(s) run at critical scheduling priority") \
3365 \
3366 experimental(bool, UseCriticalCMSThreadPriority, false, \
3367 "ConcurrentMarkSweep thread runs at critical scheduling priority")\
3368 \
3369 /* compiler debugging */ \
3370 notproduct(intx, CompileTheWorldStartAt, 1, \
3371 "First class to consider when using +CompileTheWorld") \
3372 \
3373 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3374 "Last class to consider when using +CompileTheWorld") \
3375 \
3376 develop(intx, NewCodeParameter, 0, \
3377 "Testing Only: Create a dedicated integer parameter before " \
3378 "putback") \
3379 \
3380 /* new oopmap storage allocation */ \
3381 develop(intx, MinOopMapAllocation, 8, \
3382 "Minimum number of OopMap entries in an OopMapSet") \
3383 \
3384 /* Background Compilation */ \
3385 develop(intx, LongCompileThreshold, 50, \
3386 "Used with +TraceLongCompiles") \
3387 \
3388 product(intx, StarvationMonitorInterval, 200, \
3389 "Pause between each check in ms") \
3390 \
3391 /* recompilation */ \
3392 product_pd(intx, CompileThreshold, \
3393 "number of interpreted method invocations before (re-)compiling") \
3394 \
3395 product_pd(intx, BackEdgeThreshold, \
3396 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3397 \
3398 product(intx, Tier0InvokeNotifyFreqLog, 7, \
3399 "Interpreter (tier 0) invocation notification frequency.") \
3400 \
3401 product(intx, Tier2InvokeNotifyFreqLog, 11, \
3402 "C1 without MDO (tier 2) invocation notification frequency.") \
3403 \
3404 product(intx, Tier3InvokeNotifyFreqLog, 10, \
3405 "C1 with MDO profiling (tier 3) invocation notification " \
3406 "frequency.") \
3407 \
3408 product(intx, Tier23InlineeNotifyFreqLog, 20, \
3409 "Inlinee invocation (tiers 2 and 3) notification frequency") \
3410 \
3411 product(intx, Tier0BackedgeNotifyFreqLog, 10, \
3412 "Interpreter (tier 0) invocation notification frequency.") \
3413 \
3414 product(intx, Tier2BackedgeNotifyFreqLog, 14, \
3415 "C1 without MDO (tier 2) invocation notification frequency.") \
3416 \
3417 product(intx, Tier3BackedgeNotifyFreqLog, 13, \
3418 "C1 with MDO profiling (tier 3) invocation notification " \
3419 "frequency.") \
3420 \
3421 product(intx, Tier2CompileThreshold, 0, \
3422 "threshold at which tier 2 compilation is invoked") \
3423 \
3424 product(intx, Tier2BackEdgeThreshold, 0, \
3425 "Back edge threshold at which tier 2 compilation is invoked") \
3426 \
3427 product(intx, Tier3InvocationThreshold, 200, \
3428 "Compile if number of method invocations crosses this " \
3429 "threshold") \
3430 \
3431 product(intx, Tier3MinInvocationThreshold, 100, \
3432 "Minimum invocation to compile at tier 3") \
3433 \
3434 product(intx, Tier3CompileThreshold, 2000, \
3435 "Threshold at which tier 3 compilation is invoked (invocation " \
3436 "minimum must be satisfied.") \
3437 \
3438 product(intx, Tier3BackEdgeThreshold, 60000, \
3439 "Back edge threshold at which tier 3 OSR compilation is invoked") \
3440 \
3441 product(intx, Tier4InvocationThreshold, 5000, \
3442 "Compile if number of method invocations crosses this " \
3443 "threshold") \
3444 \
3445 product(intx, Tier4MinInvocationThreshold, 600, \
3446 "Minimum invocation to compile at tier 4") \
3447 \
3448 product(intx, Tier4CompileThreshold, 15000, \
3449 "Threshold at which tier 4 compilation is invoked (invocation " \
3450 "minimum must be satisfied.") \
3451 \
3452 product(intx, Tier4BackEdgeThreshold, 40000, \
3453 "Back edge threshold at which tier 4 OSR compilation is invoked") \
3454 \
3455 product(intx, Tier3DelayOn, 5, \
3456 "If C2 queue size grows over this amount per compiler thread " \
3457 "stop compiling at tier 3 and start compiling at tier 2") \
3458 \
3459 product(intx, Tier3DelayOff, 2, \
3460 "If C2 queue size is less than this amount per compiler thread " \
3461 "allow methods compiled at tier 2 transition to tier 3") \
3462 \
3463 product(intx, Tier3LoadFeedback, 5, \
3464 "Tier 3 thresholds will increase twofold when C1 queue size " \
3465 "reaches this amount per compiler thread") \
3466 \
3467 product(intx, Tier4LoadFeedback, 3, \
3468 "Tier 4 thresholds will increase twofold when C2 queue size " \
3469 "reaches this amount per compiler thread") \
3470 \
3471 product(intx, TieredCompileTaskTimeout, 50, \
3472 "Kill compile task if method was not used within " \
3473 "given timeout in milliseconds") \
3474 \
3475 product(intx, TieredStopAtLevel, 4, \
3476 "Stop at given compilation level") \
3477 \
3478 product(intx, Tier0ProfilingStartPercentage, 200, \
3479 "Start profiling in interpreter if the counters exceed tier 3" \
3480 "thresholds by the specified percentage") \
3481 \
3482 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
3483 "Increase the compile threshold for C1 compilation if the code" \
3484 "cache is filled by the specified percentage.") \
3485 \
3486 product(intx, TieredRateUpdateMinTime, 1, \
3487 "Minimum rate sampling interval (in milliseconds)") \
3488 \
3489 product(intx, TieredRateUpdateMaxTime, 25, \
3490 "Maximum rate sampling interval (in milliseconds)") \
3491 \
3492 product_pd(bool, TieredCompilation, \
3493 "Enable tiered compilation") \
3494 \
3495 product(bool, PrintTieredEvents, false, \
3496 "Print tiered events notifications") \
3497 \
3498 product_pd(intx, OnStackReplacePercentage, \
3499 "NON_TIERED number of method invocations/branches (expressed as %"\
3500 "of CompileThreshold) before (re-)compiling OSR code") \
3501 \
3502 product(intx, InterpreterProfilePercentage, 33, \
3503 "NON_TIERED number of method invocations/branches (expressed as %"\
3504 "of CompileThreshold) before profiling in the interpreter") \
3505 \
3506 develop(intx, MaxRecompilationSearchLength, 10, \
3507 "max. # frames to inspect searching for recompilee") \
3508 \
3509 develop(intx, MaxInterpretedSearchLength, 3, \
3510 "max. # interp. frames to skip when searching for recompilee") \
3511 \
3512 develop(intx, DesiredMethodLimit, 8000, \
3513 "desired max. method size (in bytecodes) after inlining") \
3514 \
3515 develop(intx, HugeMethodLimit, 8000, \
3516 "don't compile methods larger than this if " \
3517 "+DontCompileHugeMethods") \
3518 \
3519 /* New JDK 1.4 reflection implementation */ \
3520 \
3521 develop(bool, UseNewReflection, true, \
3522 "Temporary flag for transition to reflection based on dynamic " \
3523 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3524 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3525 "changes were needed") \
3526 \
3527 develop(bool, VerifyReflectionBytecodes, false, \
3528 "Force verification of 1.4 reflection bytecodes. Does not work " \
3529 "in situations like that described in 4486457 or for " \
3530 "constructors generated for serialization, so can not be enabled "\
3531 "in product.") \
3532 \
3533 product(bool, ReflectionWrapResolutionErrors, true, \
3534 "Temporary flag for transition to AbstractMethodError wrapped " \
3535 "in InvocationTargetException. See 6531596") \
3536 \
3537 \
3538 develop(intx, FastSuperclassLimit, 8, \
3539 "Depth of hardwired instanceof accelerator array") \
3540 \
3541 /* Properties for Java libraries */ \
3542 \
3543 product(uintx, MaxDirectMemorySize, 0, \
3544 "Maximum total size of NIO direct-buffer allocations") \
3545 \
3546 /* temporary developer defined flags */ \
3547 \
3548 diagnostic(bool, UseNewCode, false, \
3549 "Testing Only: Use the new version while testing") \
3550 \
3551 diagnostic(bool, UseNewCode2, false, \
3552 "Testing Only: Use the new version while testing") \
3553 \
3554 diagnostic(bool, UseNewCode3, false, \
3555 "Testing Only: Use the new version while testing") \
3556 \
3557 /* flags for performance data collection */ \
3558 \
3559 product(bool, UsePerfData, falseInEmbedded, \
3560 "Flag to disable jvmstat instrumentation for performance testing" \
3561 "and problem isolation purposes.") \
3562 \
3563 product(bool, PerfDataSaveToFile, false, \
3564 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3565 \
3566 product(ccstr, PerfDataSaveFile, NULL, \
3567 "Save PerfData memory to the specified absolute pathname," \
3568 "%p in the file name if present will be replaced by pid") \
3569 \
3570 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3571 "Data sampling interval in milliseconds") \
3572 \
3573 develop(bool, PerfTraceDataCreation, false, \
3574 "Trace creation of Performance Data Entries") \
3575 \
3576 develop(bool, PerfTraceMemOps, false, \
3577 "Trace PerfMemory create/attach/detach calls") \
3578 \
3579 product(bool, PerfDisableSharedMem, false, \
3580 "Store performance data in standard memory") \
3581 \
3582 product(intx, PerfDataMemorySize, 32*K, \
3583 "Size of performance data memory region. Will be rounded " \
3584 "up to a multiple of the native os page size.") \
3585 \
3586 product(intx, PerfMaxStringConstLength, 1024, \
3587 "Maximum PerfStringConstant string length before truncation") \
3588 \
3589 product(bool, PerfAllowAtExitRegistration, false, \
3590 "Allow registration of atexit() methods") \
3591 \
3592 product(bool, PerfBypassFileSystemCheck, false, \
3593 "Bypass Win32 file system criteria checks (Windows Only)") \
3594 \
3595 product(intx, UnguardOnExecutionViolation, 0, \
3596 "Unguard page and retry on no-execute fault (Win32 only)" \
3597 "0=off, 1=conservative, 2=aggressive") \
3598 \
3599 /* Serviceability Support */ \
3600 \
3601 product(bool, ManagementServer, false, \
3602 "Create JMX Management Server") \
3603 \
3604 product(bool, DisableAttachMechanism, false, \
3605 "Disable mechanism that allows tools to attach to this VM") \
3606 \
3607 product(bool, StartAttachListener, false, \
3608 "Always start Attach Listener at VM startup") \
3609 \
3610 manageable(bool, PrintConcurrentLocks, false, \
3611 "Print java.util.concurrent locks in thread dump") \
3612 \
3613 product(bool, TransmitErrorReport, false, \
3614 "Enable error report transmission on erroneous termination") \
3615 \
3616 product(ccstr, ErrorReportServer, NULL, \
3617 "Override built-in error report server address") \
3618 \
3619 /* Shared spaces */ \
3620 \
3621 product(bool, UseSharedSpaces, true, \
3622 "Use shared spaces for metadata") \
3623 \
3624 product(bool, RequireSharedSpaces, false, \
3625 "Require shared spaces for metadata") \
3626 \
3627 product(bool, DumpSharedSpaces, false, \
3628 "Special mode: JVM reads a class list, loads classes, builds " \
3629 "shared spaces, and dumps the shared spaces to a file to be " \
3630 "used in future JVM runs.") \
3631 \
3632 product(bool, PrintSharedSpaces, false, \
3633 "Print usage of shared spaces") \
3634 \
3635 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3636 "Size of read-write space for metadata (in bytes)") \
3637 \
3638 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \
3639 "Size of read-only space for metadata (in bytes)") \
3640 \
3641 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \
3642 "Size of the shared miscellaneous data area (in bytes)") \
3643 \
3644 product(uintx, SharedMiscCodeSize, 120*K, \
3645 "Size of the shared miscellaneous code area (in bytes)") \
3646 \
3647 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \
3648 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \
3649 "Address to allocate shared memory region for class data") \
3650 \
3651 diagnostic(bool, EnableInvokeDynamic, true, \
3652 "support JSR 292 (method handles, invokedynamic, " \
3653 "anonymous classes") \
3654 \
3655 diagnostic(bool, PrintMethodHandleStubs, false, \
3656 "Print generated stub code for method handles") \
3657 \
3658 develop(bool, TraceMethodHandles, false, \
3659 "trace internal method handle operations") \
3660 \
3661 diagnostic(bool, VerifyMethodHandles, trueInDebug, \
3662 "perform extra checks when constructing method handles") \
3663 \
3664 diagnostic(bool, ShowHiddenFrames, false, \
3665 "show method handle implementation frames (usually hidden)") \
3666 \
3667 experimental(bool, TrustFinalNonStaticFields, false, \
3668 "trust final non-static declarations for constant folding") \
3669 \
3670 develop(bool, TraceInvokeDynamic, false, \
3671 "trace internal invoke dynamic operations") \
3672 \
3673 diagnostic(bool, PauseAtStartup, false, \
3674 "Causes the VM to pause at startup time and wait for the pause " \
3675 "file to be removed (default: ./vm.paused.<pid>)") \
3676 \
3677 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3678 "The file to create and for whose removal to await when pausing " \
3679 "at startup. (default: ./vm.paused.<pid>)") \
3680 \
3681 diagnostic(bool, PauseAtExit, false, \
3682 "Pause and wait for keypress on exit if a debugger is attached") \
3683 \
3684 product(bool, ExtendedDTraceProbes, false, \
3685 "Enable performance-impacting dtrace probes") \
3686 \
3687 product(bool, DTraceMethodProbes, false, \
3688 "Enable dtrace probes for method-entry and method-exit") \
3689 \
3690 product(bool, DTraceAllocProbes, false, \
3691 "Enable dtrace probes for object allocation") \
3692 \
3693 product(bool, DTraceMonitorProbes, false, \
3694 "Enable dtrace probes for monitor events") \
3695 \
3696 product(bool, RelaxAccessControlCheck, false, \
3697 "Relax the access control checks in the verifier") \
3698 \
3699 diagnostic(bool, PrintDTraceDOF, false, \
3700 "Print the DTrace DOF passed to the system for JSDT probes") \
3701 \
3702 product(uintx, StringTableSize, defaultStringTableSize, \
3703 "Number of buckets in the interned String table") \
3704 \
3705 develop(bool, TraceDefaultMethods, false, \
3706 "Trace the default method processing steps") \
3707 \
3708 develop(bool, ParseAllGenericSignatures, false, \
3709 "Parse all generic signatures while classloading") \
3710 \
3711 develop(bool, VerifyGenericSignatures, false, \
3712 "Abort VM on erroneous or inconsistent generic signatures") \
3713 \
3714 product(bool, ParseGenericDefaults, false, \
3715 "Parse generic signatures for default method handling") \
3716 \
3717 product(bool, UseVMInterruptibleIO, false, \
3718 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3719 "EINTR for I/O operations results in OS_INTRPT. The default value"\
3720 " of this flag is true for JDK 6 and earlier") \
3721 \
3722 diagnostic(bool, WhiteBoxAPI, false, \
3723 "Enable internal testing APIs") \
3724 \
3725 product(bool, PrintGCCause, true, \
3726 "Include GC cause in GC logging") \
3727 \
3728 product(bool , AllowNonVirtualCalls, false, \
3729 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \
3730 \
3731 diagnostic(ccstr, SharedArchiveFile, NULL, \
3732 "Override the default location of the CDS archive file") \
3733 \
3734 experimental(uintx, ArrayAllocatorMallocLimit, \
3735 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
3736 "Allocation less than this value will be allocated " \
3737 "using malloc. Larger allocations will use mmap.") \
3738 \
3739 product(bool, EnableTracing, false, \
3740 "Enable event-based tracing") \
3741 product(bool, UseLockedTracing, false, \
3742 "Use locked-tracing when doing event-based tracing")
3745 /*
3746 * Macros for factoring of globals
3747 */
3749 // Interface macros
3750 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3751 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3752 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3753 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3754 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3755 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3756 #ifdef PRODUCT
3757 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
3758 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
3759 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3760 #else
3761 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3762 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3763 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3764 #endif
3765 // Special LP64 flags, product only needed for now.
3766 #ifdef _LP64
3767 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3768 #else
3769 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3770 #endif // _LP64
3772 // Implementation macros
3773 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3774 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3775 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3776 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3777 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3778 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3779 #ifdef PRODUCT
3780 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3781 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
3782 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3783 #else
3784 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3785 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3786 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3787 #endif
3788 #ifdef _LP64
3789 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3790 #else
3791 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3792 #endif // _LP64
3794 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)
3796 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3798 ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)
3800 // Extensions
3802 #include "runtime/globals_ext.hpp"
3804 #endif // SHARE_VM_RUNTIME_GLOBALS_HPP
