Mon, 30 Mar 2009 18:19:31 -0700
6821700: tune VM flags for peak performance
Summary: Tune C2 flags default values for performance.
Reviewed-by: never, phh, iveresov, jmasa, ysr
1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #if !defined(COMPILER1) && !defined(COMPILER2)
26 define_pd_global(bool, BackgroundCompilation, false);
27 define_pd_global(bool, UseTLAB, false);
28 define_pd_global(bool, CICompileOSR, false);
29 define_pd_global(bool, UseTypeProfile, false);
30 define_pd_global(bool, UseOnStackReplacement, false);
31 define_pd_global(bool, InlineIntrinsics, false);
32 define_pd_global(bool, PreferInterpreterNativeStubs, true);
33 define_pd_global(bool, ProfileInterpreter, false);
34 define_pd_global(bool, ProfileTraps, false);
35 define_pd_global(bool, TieredCompilation, false);
37 define_pd_global(intx, CompileThreshold, 0);
38 define_pd_global(intx, Tier2CompileThreshold, 0);
39 define_pd_global(intx, Tier3CompileThreshold, 0);
40 define_pd_global(intx, Tier4CompileThreshold, 0);
42 define_pd_global(intx, BackEdgeThreshold, 0);
43 define_pd_global(intx, Tier2BackEdgeThreshold, 0);
44 define_pd_global(intx, Tier3BackEdgeThreshold, 0);
45 define_pd_global(intx, Tier4BackEdgeThreshold, 0);
47 define_pd_global(intx, OnStackReplacePercentage, 0);
48 define_pd_global(bool, ResizeTLAB, false);
49 define_pd_global(intx, FreqInlineSize, 0);
50 define_pd_global(intx, InlineSmallCode, 0);
51 define_pd_global(intx, NewSizeThreadIncrease, 4*K);
52 define_pd_global(intx, NewRatio, 4);
53 define_pd_global(intx, InlineClassNatives, true);
54 define_pd_global(intx, InlineUnsafeOps, true);
55 define_pd_global(intx, InitialCodeCacheSize, 160*K);
56 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
57 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
58 define_pd_global(intx, CodeCacheMinBlockLength, 1);
59 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M));
60 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
61 define_pd_global(bool, NeverActAsServerClassMachine, true);
62 define_pd_global(uintx, DefaultMaxRAM, 1*G);
63 #define CI_COMPILER_COUNT 0
64 #else
66 #ifdef COMPILER2
67 #define CI_COMPILER_COUNT 2
68 #else
69 #define CI_COMPILER_COUNT 1
70 #endif // COMPILER2
72 #endif // no compilers
75 // string type aliases used only in this file
76 typedef const char* ccstr;
77 typedef const char* ccstrlist; // represents string arguments which accumulate
79 enum FlagValueOrigin {
80 DEFAULT = 0,
81 COMMAND_LINE = 1,
82 ENVIRON_VAR = 2,
83 CONFIG_FILE = 3,
84 MANAGEMENT = 4,
85 ERGONOMIC = 5,
86 ATTACH_ON_DEMAND = 6,
87 INTERNAL = 99
88 };
90 struct Flag {
91 const char *type;
92 const char *name;
93 void* addr;
94 const char *kind;
95 FlagValueOrigin origin;
97 // points to all Flags static array
98 static Flag *flags;
100 // number of flags
101 static size_t numFlags;
103 static Flag* find_flag(char* name, size_t length);
105 bool is_bool() const { return strcmp(type, "bool") == 0; }
106 bool get_bool() const { return *((bool*) addr); }
107 void set_bool(bool value) { *((bool*) addr) = value; }
109 bool is_intx() const { return strcmp(type, "intx") == 0; }
110 intx get_intx() const { return *((intx*) addr); }
111 void set_intx(intx value) { *((intx*) addr) = value; }
113 bool is_uintx() const { return strcmp(type, "uintx") == 0; }
114 uintx get_uintx() const { return *((uintx*) addr); }
115 void set_uintx(uintx value) { *((uintx*) addr) = value; }
117 bool is_double() const { return strcmp(type, "double") == 0; }
118 double get_double() const { return *((double*) addr); }
119 void set_double(double value) { *((double*) addr) = value; }
121 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
122 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
123 ccstr get_ccstr() const { return *((ccstr*) addr); }
124 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
126 bool is_unlocker() const;
127 bool is_unlocked() const;
128 bool is_writeable() const;
129 bool is_external() const;
131 void print_on(outputStream* st);
132 void print_as_flag(outputStream* st);
133 };
135 // debug flags control various aspects of the VM and are global accessible
137 // use FlagSetting to temporarily change some debug flag
138 // e.g. FlagSetting fs(DebugThisAndThat, true);
139 // restored to previous value upon leaving scope
140 class FlagSetting {
141 bool val;
142 bool* flag;
143 public:
144 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
145 ~FlagSetting() { *flag = val; }
146 };
149 class CounterSetting {
150 intx* counter;
151 public:
152 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
153 ~CounterSetting() { (*counter)--; }
154 };
157 class IntFlagSetting {
158 intx val;
159 intx* flag;
160 public:
161 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
162 ~IntFlagSetting() { *flag = val; }
163 };
166 class DoubleFlagSetting {
167 double val;
168 double* flag;
169 public:
170 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
171 ~DoubleFlagSetting() { *flag = val; }
172 };
175 class CommandLineFlags {
176 public:
177 static bool boolAt(char* name, size_t len, bool* value);
178 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
179 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
180 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
182 static bool intxAt(char* name, size_t len, intx* value);
183 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
184 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
185 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
187 static bool uintxAt(char* name, size_t len, uintx* value);
188 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
189 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
190 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
192 static bool doubleAt(char* name, size_t len, double* value);
193 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
194 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
195 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
197 static bool ccstrAt(char* name, size_t len, ccstr* value);
198 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
199 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
200 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
202 // Returns false if name is not a command line flag.
203 static bool wasSetOnCmdline(const char* name, bool* value);
204 static void printSetFlags();
206 static void printFlags() PRODUCT_RETURN;
208 static void verify() PRODUCT_RETURN;
209 };
211 // use this for flags that are true by default in the debug version but
212 // false in the optimized version, and vice versa
213 #ifdef ASSERT
214 #define trueInDebug true
215 #define falseInDebug false
216 #else
217 #define trueInDebug false
218 #define falseInDebug true
219 #endif
221 // use this for flags that are true per default in the product build
222 // but false in development builds, and vice versa
223 #ifdef PRODUCT
224 #define trueInProduct true
225 #define falseInProduct false
226 #else
227 #define trueInProduct false
228 #define falseInProduct true
229 #endif
231 // use this for flags that are true per default in the tiered build
232 // but false in non-tiered builds, and vice versa
233 #ifdef TIERED
234 #define trueInTiered true
235 #define falseInTiered false
236 #else
237 #define trueInTiered false
238 #define falseInTiered true
239 #endif
241 // develop flags are settable / visible only during development and are constant in the PRODUCT version
242 // product flags are always settable / visible
243 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
245 // A flag must be declared with one of the following types:
246 // bool, intx, uintx, ccstr.
247 // The type "ccstr" is an alias for "const char*" and is used
248 // only in this file, because the macrology requires single-token type names.
250 // Note: Diagnostic options not meant for VM tuning or for product modes.
251 // They are to be used for VM quality assurance or field diagnosis
252 // of VM bugs. They are hidden so that users will not be encouraged to
253 // try them as if they were VM ordinary execution options. However, they
254 // are available in the product version of the VM. Under instruction
255 // from support engineers, VM customers can turn them on to collect
256 // diagnostic information about VM problems. To use a VM diagnostic
257 // option, you must first specify +UnlockDiagnosticVMOptions.
258 // (This master switch also affects the behavior of -Xprintflags.)
259 //
260 // experimental flags are in support of features that are not
261 // part of the officially supported product, but are available
262 // for experimenting with. They could, for example, be performance
263 // features that may not have undergone full or rigorous QA, but which may
264 // help performance in some cases and released for experimentation
265 // by the community of users and developers. This flag also allows one to
266 // be able to build a fully supported product that nonetheless also
267 // ships with some unsupported, lightly tested, experimental features.
268 // Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
269 // UnlockExperimentalVMOptions flag, which allows the control and
270 // modification of the experimental flags.
271 //
272 // manageable flags are writeable external product flags.
273 // They are dynamically writeable through the JDK management interface
274 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
275 // These flags are external exported interface (see CCC). The list of
276 // manageable flags can be queried programmatically through the management
277 // interface.
278 //
279 // A flag can be made as "manageable" only if
280 // - the flag is defined in a CCC as an external exported interface.
281 // - the VM implementation supports dynamic setting of the flag.
282 // This implies that the VM must *always* query the flag variable
283 // and not reuse state related to the flag state at any given time.
284 // - you want the flag to be queried programmatically by the customers.
285 //
286 // product_rw flags are writeable internal product flags.
287 // They are like "manageable" flags but for internal/private use.
288 // The list of product_rw flags are internal/private flags which
289 // may be changed/removed in a future release. It can be set
290 // through the management interface to get/set value
291 // when the name of flag is supplied.
292 //
293 // A flag can be made as "product_rw" only if
294 // - the VM implementation supports dynamic setting of the flag.
295 // This implies that the VM must *always* query the flag variable
296 // and not reuse state related to the flag state at any given time.
297 //
298 // Note that when there is a need to support develop flags to be writeable,
299 // it can be done in the same way as product_rw.
301 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
302 \
303 lp64_product(bool, UseCompressedOops, false, \
304 "Use 32-bit object references in 64-bit VM. " \
305 "lp64_product means flag is always constant in 32 bit VM") \
306 \
307 notproduct(bool, CheckCompressedOops, true, \
308 "generate checks in encoding/decoding code in debug VM") \
309 \
310 product_pd(uintx, HeapBaseMinAddress, \
311 "OS specific low limit for heap base address") \
312 \
313 diagnostic(bool, PrintCompressedOopsMode, false, \
314 "Print compressed oops base address and encoding mode") \
315 \
316 /* UseMembar is theoretically a temp flag used for memory barrier \
317 * removal testing. It was supposed to be removed before FCS but has \
318 * been re-added (see 6401008) */ \
319 product(bool, UseMembar, false, \
320 "(Unstable) Issues membars on thread state transitions") \
321 \
322 product(bool, PrintCommandLineFlags, false, \
323 "Prints flags that appeared on the command line") \
324 \
325 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
326 "Enable normal processing of flags relating to field diagnostics")\
327 \
328 experimental(bool, UnlockExperimentalVMOptions, false, \
329 "Enable normal processing of flags relating to experimental features")\
330 \
331 product(bool, JavaMonitorsInStackTrace, true, \
332 "Print info. about Java monitor locks when the stacks are dumped")\
333 \
334 product_pd(bool, UseLargePages, \
335 "Use large page memory") \
336 \
337 product_pd(bool, UseLargePagesIndividualAllocation, \
338 "Allocate large pages individually for better affinity") \
339 \
340 develop(bool, LargePagesIndividualAllocationInjectError, false, \
341 "Fail large pages individual allocation") \
342 \
343 develop(bool, TracePageSizes, false, \
344 "Trace page size selection and usage.") \
345 \
346 product(bool, UseNUMA, false, \
347 "Use NUMA if available") \
348 \
349 product(bool, ForceNUMA, false, \
350 "Force NUMA optimizations on single-node/UMA systems") \
351 \
352 product(intx, NUMAChunkResizeWeight, 20, \
353 "Percentage (0-100) used to weight the current sample when " \
354 "computing exponentially decaying average for " \
355 "AdaptiveNUMAChunkSizing") \
356 \
357 product(intx, NUMASpaceResizeRate, 1*G, \
358 "Do not reallocate more that this amount per collection") \
359 \
360 product(bool, UseAdaptiveNUMAChunkSizing, true, \
361 "Enable adaptive chunk sizing for NUMA") \
362 \
363 product(bool, NUMAStats, false, \
364 "Print NUMA stats in detailed heap information") \
365 \
366 product(intx, NUMAPageScanRate, 256, \
367 "Maximum number of pages to include in the page scan procedure") \
368 \
369 product_pd(bool, NeedsDeoptSuspend, \
370 "True for register window machines (sparc/ia64)") \
371 \
372 product(intx, UseSSE, 99, \
373 "Highest supported SSE instructions set on x86/x64") \
374 \
375 product(uintx, LargePageSizeInBytes, 0, \
376 "Large page size (0 to let VM choose the page size") \
377 \
378 product(uintx, LargePageHeapSizeThreshold, 128*M, \
379 "Use large pages if max heap is at least this big") \
380 \
381 product(bool, ForceTimeHighResolution, false, \
382 "Using high time resolution(For Win32 only)") \
383 \
384 develop(bool, TraceItables, false, \
385 "Trace initialization and use of itables") \
386 \
387 develop(bool, TracePcPatching, false, \
388 "Trace usage of frame::patch_pc") \
389 \
390 develop(bool, TraceJumps, false, \
391 "Trace assembly jumps in thread ring buffer") \
392 \
393 develop(bool, TraceRelocator, false, \
394 "Trace the bytecode relocator") \
395 \
396 develop(bool, TraceLongCompiles, false, \
397 "Print out every time compilation is longer than " \
398 "a given threashold") \
399 \
400 develop(bool, SafepointALot, false, \
401 "Generates a lot of safepoints. Works with " \
402 "GuaranteedSafepointInterval") \
403 \
404 product_pd(bool, BackgroundCompilation, \
405 "A thread requesting compilation is not blocked during " \
406 "compilation") \
407 \
408 product(bool, PrintVMQWaitTime, false, \
409 "Prints out the waiting time in VM operation queue") \
410 \
411 develop(bool, BailoutToInterpreterForThrows, false, \
412 "Compiled methods which throws/catches exceptions will be " \
413 "deopt and intp.") \
414 \
415 develop(bool, NoYieldsInMicrolock, false, \
416 "Disable yields in microlock") \
417 \
418 develop(bool, TraceOopMapGeneration, false, \
419 "Shows oopmap generation") \
420 \
421 product(bool, MethodFlushing, true, \
422 "Reclamation of zombie and not-entrant methods") \
423 \
424 develop(bool, VerifyStack, false, \
425 "Verify stack of each thread when it is entering a runtime call") \
426 \
427 develop(bool, ForceUnreachable, false, \
428 "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \
429 \
430 notproduct(bool, StressDerivedPointers, false, \
431 "Force scavenge when a derived pointers is detected on stack " \
432 "after rtm call") \
433 \
434 develop(bool, TraceDerivedPointers, false, \
435 "Trace traversal of derived pointers on stack") \
436 \
437 notproduct(bool, TraceCodeBlobStacks, false, \
438 "Trace stack-walk of codeblobs") \
439 \
440 product(bool, PrintJNIResolving, false, \
441 "Used to implement -v:jni") \
442 \
443 notproduct(bool, PrintRewrites, false, \
444 "Print methods that are being rewritten") \
445 \
446 product(bool, UseInlineCaches, true, \
447 "Use Inline Caches for virtual calls ") \
448 \
449 develop(bool, InlineArrayCopy, true, \
450 "inline arraycopy native that is known to be part of " \
451 "base library DLL") \
452 \
453 develop(bool, InlineObjectHash, true, \
454 "inline Object::hashCode() native that is known to be part " \
455 "of base library DLL") \
456 \
457 develop(bool, InlineObjectCopy, true, \
458 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \
459 \
460 develop(bool, InlineNatives, true, \
461 "inline natives that are known to be part of base library DLL") \
462 \
463 develop(bool, InlineMathNatives, true, \
464 "inline SinD, CosD, etc.") \
465 \
466 develop(bool, InlineClassNatives, true, \
467 "inline Class.isInstance, etc") \
468 \
469 develop(bool, InlineAtomicLong, true, \
470 "inline sun.misc.AtomicLong") \
471 \
472 develop(bool, InlineThreadNatives, true, \
473 "inline Thread.currentThread, etc") \
474 \
475 develop(bool, InlineReflectionGetCallerClass, true, \
476 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\
477 "of base library DLL") \
478 \
479 develop(bool, InlineUnsafeOps, true, \
480 "inline memory ops (native methods) from sun.misc.Unsafe") \
481 \
482 develop(bool, ConvertCmpD2CmpF, true, \
483 "Convert cmpD to cmpF when one input is constant in float range") \
484 \
485 develop(bool, ConvertFloat2IntClipping, true, \
486 "Convert float2int clipping idiom to integer clipping") \
487 \
488 develop(bool, SpecialStringCompareTo, true, \
489 "special version of string compareTo") \
490 \
491 develop(bool, SpecialStringIndexOf, true, \
492 "special version of string indexOf") \
493 \
494 product(bool, SpecialArraysEquals, false, \
495 "special version of Arrays.equals(char[],char[])") \
496 \
497 develop(bool, TraceCallFixup, false, \
498 "traces all call fixups") \
499 \
500 develop(bool, DeoptimizeALot, false, \
501 "deoptimize at every exit from the runtime system") \
502 \
503 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
504 "a comma separated list of bcis to deoptimize at") \
505 \
506 product(bool, DeoptimizeRandom, false, \
507 "deoptimize random frames on random exit from the runtime system")\
508 \
509 notproduct(bool, ZombieALot, false, \
510 "creates zombies (non-entrant) at exit from the runt. system") \
511 \
512 notproduct(bool, WalkStackALot, false, \
513 "trace stack (no print) at every exit from the runtime system") \
514 \
515 develop(bool, Debugging, false, \
516 "set when executing debug methods in debug.ccp " \
517 "(to prevent triggering assertions)") \
518 \
519 notproduct(bool, StrictSafepointChecks, trueInDebug, \
520 "Enable strict checks that safepoints cannot happen for threads " \
521 "that used No_Safepoint_Verifier") \
522 \
523 notproduct(bool, VerifyLastFrame, false, \
524 "Verify oops on last frame on entry to VM") \
525 \
526 develop(bool, TraceHandleAllocation, false, \
527 "Prints out warnings when suspicious many handles are allocated") \
528 \
529 product(bool, UseCompilerSafepoints, true, \
530 "Stop at safepoints in compiled code") \
531 \
532 product(bool, UseSplitVerifier, true, \
533 "use split verifier with StackMapTable attributes") \
534 \
535 product(bool, FailOverToOldVerifier, true, \
536 "fail over to old verifier when split verifier fails") \
537 \
538 develop(bool, ShowSafepointMsgs, false, \
539 "Show msg. about safepoint synch.") \
540 \
541 product(bool, SafepointTimeout, false, \
542 "Time out and warn or fail after SafepointTimeoutDelay " \
543 "milliseconds if failed to reach safepoint") \
544 \
545 develop(bool, DieOnSafepointTimeout, false, \
546 "Die upon failure to reach safepoint (see SafepointTimeout)") \
547 \
548 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
549 /* typically, at most a few retries are needed */ \
550 product(intx, SuspendRetryCount, 50, \
551 "Maximum retry count for an external suspend request") \
552 \
553 product(intx, SuspendRetryDelay, 5, \
554 "Milliseconds to delay per retry (* current_retry_count)") \
555 \
556 product(bool, AssertOnSuspendWaitFailure, false, \
557 "Assert/Guarantee on external suspend wait failure") \
558 \
559 product(bool, TraceSuspendWaitFailures, false, \
560 "Trace external suspend wait failures") \
561 \
562 product(bool, MaxFDLimit, true, \
563 "Bump the number of file descriptors to max in solaris.") \
564 \
565 notproduct(bool, LogEvents, trueInDebug, \
566 "Enable Event log") \
567 \
568 product(bool, BytecodeVerificationRemote, true, \
569 "Enables the Java bytecode verifier for remote classes") \
570 \
571 product(bool, BytecodeVerificationLocal, false, \
572 "Enables the Java bytecode verifier for local classes") \
573 \
574 develop(bool, ForceFloatExceptions, trueInDebug, \
575 "Force exceptions on FP stack under/overflow") \
576 \
577 develop(bool, SoftMatchFailure, trueInProduct, \
578 "If the DFA fails to match a node, print a message and bail out") \
579 \
580 develop(bool, VerifyStackAtCalls, false, \
581 "Verify that the stack pointer is unchanged after calls") \
582 \
583 develop(bool, TraceJavaAssertions, false, \
584 "Trace java language assertions") \
585 \
586 notproduct(bool, CheckAssertionStatusDirectives, false, \
587 "temporary - see javaClasses.cpp") \
588 \
589 notproduct(bool, PrintMallocFree, false, \
590 "Trace calls to C heap malloc/free allocation") \
591 \
592 notproduct(bool, PrintOopAddress, false, \
593 "Always print the location of the oop") \
594 \
595 notproduct(bool, VerifyCodeCacheOften, false, \
596 "Verify compiled-code cache often") \
597 \
598 develop(bool, ZapDeadCompiledLocals, false, \
599 "Zap dead locals in compiler frames") \
600 \
601 notproduct(bool, ZapDeadLocalsOld, false, \
602 "Zap dead locals (old version, zaps all frames when " \
603 "entering the VM") \
604 \
605 notproduct(bool, CheckOopishValues, false, \
606 "Warn if value contains oop ( requires ZapDeadLocals)") \
607 \
608 develop(bool, UseMallocOnly, false, \
609 "use only malloc/free for allocation (no resource area/arena)") \
610 \
611 develop(bool, PrintMalloc, false, \
612 "print all malloc/free calls") \
613 \
614 develop(bool, ZapResourceArea, trueInDebug, \
615 "Zap freed resource/arena space with 0xABABABAB") \
616 \
617 notproduct(bool, ZapVMHandleArea, trueInDebug, \
618 "Zap freed VM handle space with 0xBCBCBCBC") \
619 \
620 develop(bool, ZapJNIHandleArea, trueInDebug, \
621 "Zap freed JNI handle space with 0xFEFEFEFE") \
622 \
623 develop(bool, ZapUnusedHeapArea, trueInDebug, \
624 "Zap unused heap space with 0xBAADBABE") \
625 \
626 develop(bool, TraceZapUnusedHeapArea, false, \
627 "Trace zapping of unused heap space") \
628 \
629 develop(bool, CheckZapUnusedHeapArea, false, \
630 "Check zapping of unused heap space") \
631 \
632 develop(bool, ZapFillerObjects, trueInDebug, \
633 "Zap filler objects with 0xDEAFBABE") \
634 \
635 develop(bool, PrintVMMessages, true, \
636 "Print vm messages on console") \
637 \
638 product(bool, PrintGCApplicationConcurrentTime, false, \
639 "Print the time the application has been running") \
640 \
641 product(bool, PrintGCApplicationStoppedTime, false, \
642 "Print the time the application has been stopped") \
643 \
644 develop(bool, Verbose, false, \
645 "Prints additional debugging information from other modes") \
646 \
647 develop(bool, PrintMiscellaneous, false, \
648 "Prints uncategorized debugging information (requires +Verbose)") \
649 \
650 develop(bool, WizardMode, false, \
651 "Prints much more debugging information") \
652 \
653 product(bool, ShowMessageBoxOnError, false, \
654 "Keep process alive on VM fatal error") \
655 \
656 product_pd(bool, UseOSErrorReporting, \
657 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
658 \
659 product(bool, SuppressFatalErrorMessage, false, \
660 "Do NO Fatal Error report [Avoid deadlock]") \
661 \
662 product(ccstrlist, OnError, "", \
663 "Run user-defined commands on fatal error; see VMError.cpp " \
664 "for examples") \
665 \
666 product(ccstrlist, OnOutOfMemoryError, "", \
667 "Run user-defined commands on first java.lang.OutOfMemoryError") \
668 \
669 manageable(bool, HeapDumpBeforeFullGC, false, \
670 "Dump heap to file before any major stop-world GC") \
671 \
672 manageable(bool, HeapDumpAfterFullGC, false, \
673 "Dump heap to file after any major stop-world GC") \
674 \
675 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
676 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
677 \
678 manageable(ccstr, HeapDumpPath, NULL, \
679 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
680 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
681 "in the working directory)") \
682 \
683 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
684 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
685 "when the heap usage is larger than this") \
686 \
687 develop(uintx, HeapDumpSegmentSize, 1*G, \
688 "Approximate segment size when generating a segmented heap dump") \
689 \
690 develop(bool, BreakAtWarning, false, \
691 "Execute breakpoint upon encountering VM warning") \
692 \
693 product_pd(bool, UseVectoredExceptions, \
694 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
695 \
696 develop(bool, TraceVMOperation, false, \
697 "Trace vm operations") \
698 \
699 develop(bool, UseFakeTimers, false, \
700 "Tells whether the VM should use system time or a fake timer") \
701 \
702 diagnostic(bool, LogCompilation, false, \
703 "Log compilation activity in detail to hotspot.log or LogFile") \
704 \
705 product(bool, PrintCompilation, false, \
706 "Print compilations") \
707 \
708 diagnostic(bool, TraceNMethodInstalls, false, \
709 "Trace nmethod intallation") \
710 \
711 diagnostic(bool, TraceOSRBreakpoint, false, \
712 "Trace OSR Breakpoint ") \
713 \
714 diagnostic(bool, TraceCompileTriggered, false, \
715 "Trace compile triggered") \
716 \
717 diagnostic(bool, TraceTriggers, false, \
718 "Trace triggers") \
719 \
720 product(bool, AlwaysRestoreFPU, false, \
721 "Restore the FPU control word after every JNI call (expensive)") \
722 \
723 notproduct(bool, PrintCompilation2, false, \
724 "Print additional statistics per compilation") \
725 \
726 diagnostic(bool, PrintAdapterHandlers, false, \
727 "Print code generated for i2c/c2i adapters") \
728 \
729 diagnostic(bool, PrintAssembly, false, \
730 "Print assembly code (using external disassembler.so)") \
731 \
732 diagnostic(ccstr, PrintAssemblyOptions, NULL, \
733 "Options string passed to disassembler.so") \
734 \
735 diagnostic(bool, PrintNMethods, false, \
736 "Print assembly code for nmethods when generated") \
737 \
738 diagnostic(bool, PrintNativeNMethods, false, \
739 "Print assembly code for native nmethods when generated") \
740 \
741 develop(bool, PrintDebugInfo, false, \
742 "Print debug information for all nmethods when generated") \
743 \
744 develop(bool, PrintRelocations, false, \
745 "Print relocation information for all nmethods when generated") \
746 \
747 develop(bool, PrintDependencies, false, \
748 "Print dependency information for all nmethods when generated") \
749 \
750 develop(bool, PrintExceptionHandlers, false, \
751 "Print exception handler tables for all nmethods when generated") \
752 \
753 develop(bool, InterceptOSException, false, \
754 "Starts debugger when an implicit OS (e.g., NULL) " \
755 "exception happens") \
756 \
757 notproduct(bool, PrintCodeCache, false, \
758 "Print the compiled_code cache when exiting") \
759 \
760 develop(bool, PrintCodeCache2, false, \
761 "Print detailed info on the compiled_code cache when exiting") \
762 \
763 diagnostic(bool, PrintStubCode, false, \
764 "Print generated stub code") \
765 \
766 product(bool, StackTraceInThrowable, true, \
767 "Collect backtrace in throwable when exception happens") \
768 \
769 product(bool, OmitStackTraceInFastThrow, true, \
770 "Omit backtraces for some 'hot' exceptions in optimized code") \
771 \
772 product(bool, ProfilerPrintByteCodeStatistics, false, \
773 "Prints byte code statictics when dumping profiler output") \
774 \
775 product(bool, ProfilerRecordPC, false, \
776 "Collects tick for each 16 byte interval of compiled code") \
777 \
778 product(bool, ProfileVM, false, \
779 "Profiles ticks that fall within VM (either in the VM Thread " \
780 "or VM code called through stubs)") \
781 \
782 product(bool, ProfileIntervals, false, \
783 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
784 \
785 notproduct(bool, ProfilerCheckIntervals, false, \
786 "Collect and print info on spacing of profiler ticks") \
787 \
788 develop(bool, PrintJVMWarnings, false, \
789 "Prints warnings for unimplemented JVM functions") \
790 \
791 notproduct(uintx, WarnOnStalledSpinLock, 0, \
792 "Prints warnings for stalled SpinLocks") \
793 \
794 develop(bool, InitializeJavaLangSystem, true, \
795 "Initialize java.lang.System - turn off for individual " \
796 "method debugging") \
797 \
798 develop(bool, InitializeJavaLangString, true, \
799 "Initialize java.lang.String - turn off for individual " \
800 "method debugging") \
801 \
802 develop(bool, InitializeJavaLangExceptionsErrors, true, \
803 "Initialize various error and exception classes - turn off for " \
804 "individual method debugging") \
805 \
806 product(bool, RegisterFinalizersAtInit, true, \
807 "Register finalizable objects at end of Object.<init> or " \
808 "after allocation.") \
809 \
810 develop(bool, RegisterReferences, true, \
811 "Tells whether the VM should register soft/weak/final/phantom " \
812 "references") \
813 \
814 develop(bool, IgnoreRewrites, false, \
815 "Supress rewrites of bytecodes in the oopmap generator. " \
816 "This is unsafe!") \
817 \
818 develop(bool, PrintCodeCacheExtension, false, \
819 "Print extension of code cache") \
820 \
821 develop(bool, UsePrivilegedStack, true, \
822 "Enable the security JVM functions") \
823 \
824 develop(bool, IEEEPrecision, true, \
825 "Enables IEEE precision (for INTEL only)") \
826 \
827 develop(bool, ProtectionDomainVerification, true, \
828 "Verifies protection domain before resolution in system " \
829 "dictionary") \
830 \
831 product(bool, ClassUnloading, true, \
832 "Do unloading of classes") \
833 \
834 diagnostic(bool, LinkWellKnownClasses, false, \
835 "Resolve a well known class as soon as its name is seen") \
836 \
837 develop(bool, DisableStartThread, false, \
838 "Disable starting of additional Java threads " \
839 "(for debugging only)") \
840 \
841 develop(bool, MemProfiling, false, \
842 "Write memory usage profiling to log file") \
843 \
844 notproduct(bool, PrintSystemDictionaryAtExit, false, \
845 "Prints the system dictionary at exit") \
846 \
847 diagnostic(bool, UnsyncloadClass, false, \
848 "Unstable: VM calls loadClass unsynchronized. Custom " \
849 "class loader must call VM synchronized for findClass " \
850 "and defineClass.") \
851 \
852 product(bool, AlwaysLockClassLoader, false, \
853 "Require the VM to acquire the class loader lock before calling " \
854 "loadClass() even for class loaders registering " \
855 "as parallel capable. Default false. ") \
856 \
857 product(bool, AllowParallelDefineClass, false, \
858 "Allow parallel defineClass requests for class loaders " \
859 "registering as parallel capable. Default false") \
860 \
861 product(bool, MustCallLoadClassInternal, false, \
862 "Call loadClassInternal() rather than loadClass().Default false") \
863 \
864 product_pd(bool, DontYieldALot, \
865 "Throw away obvious excess yield calls (for SOLARIS only)") \
866 \
867 product_pd(bool, ConvertSleepToYield, \
868 "Converts sleep(0) to thread yield " \
869 "(may be off for SOLARIS to improve GUI)") \
870 \
871 product(bool, ConvertYieldToSleep, false, \
872 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
873 "behavior (SOLARIS only)") \
874 \
875 product(bool, UseBoundThreads, true, \
876 "Bind user level threads to kernel threads (for SOLARIS only)") \
877 \
878 develop(bool, UseDetachedThreads, true, \
879 "Use detached threads that are recycled upon termination " \
880 "(for SOLARIS only)") \
881 \
882 product(bool, UseLWPSynchronization, true, \
883 "Use LWP-based instead of libthread-based synchronization " \
884 "(SPARC only)") \
885 \
886 product(ccstr, SyncKnobs, NULL, \
887 "(Unstable) Various monitor synchronization tunables") \
888 \
889 product(intx, EmitSync, 0, \
890 "(Unsafe,Unstable) " \
891 " Controls emission of inline sync fast-path code") \
892 \
893 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \
894 \
895 product(intx, Atomics, 0, \
896 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \
897 \
898 product(intx, FenceInstruction, 0, \
899 "(Unsafe,Unstable) Experimental") \
900 \
901 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
902 \
903 product(intx, SyncVerbose, 0, "(Unstable)" ) \
904 \
905 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
906 \
907 product(intx, hashCode, 0, \
908 "(Unstable) select hashCode generation algorithm" ) \
909 \
910 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
911 "(Unstable, Linux-specific)" \
912 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
913 \
914 product(bool, FilterSpuriousWakeups , true, \
915 "Prevent spurious or premature wakeups from object.wait" \
916 "(Solaris only)") \
917 \
918 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
919 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
920 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
921 \
922 develop(bool, UsePthreads, false, \
923 "Use pthread-based instead of libthread-based synchronization " \
924 "(SPARC only)") \
925 \
926 product(bool, AdjustConcurrency, false, \
927 "call thr_setconcurrency at thread create time to avoid " \
928 "LWP starvation on MP systems (For Solaris Only)") \
929 \
930 develop(bool, UpdateHotSpotCompilerFileOnError, true, \
931 "Should the system attempt to update the compiler file when " \
932 "an error occurs?") \
933 \
934 product(bool, ReduceSignalUsage, false, \
935 "Reduce the use of OS signals in Java and/or the VM") \
936 \
937 notproduct(bool, ValidateMarkSweep, false, \
938 "Do extra validation during MarkSweep collection") \
939 \
940 notproduct(bool, RecordMarkSweepCompaction, false, \
941 "Enable GC-to-GC recording and querying of compaction during " \
942 "MarkSweep") \
943 \
944 develop_pd(bool, ShareVtableStubs, \
945 "Share vtable stubs (smaller code but worse branch prediction") \
946 \
947 develop(bool, LoadLineNumberTables, true, \
948 "Tells whether the class file parser loads line number tables") \
949 \
950 develop(bool, LoadLocalVariableTables, true, \
951 "Tells whether the class file parser loads local variable tables")\
952 \
953 develop(bool, LoadLocalVariableTypeTables, true, \
954 "Tells whether the class file parser loads local variable type tables")\
955 \
956 product(bool, AllowUserSignalHandlers, false, \
957 "Do not complain if the application installs signal handlers " \
958 "(Solaris & Linux only)") \
959 \
960 product(bool, UseSignalChaining, true, \
961 "Use signal-chaining to invoke signal handlers installed " \
962 "by the application (Solaris & Linux only)") \
963 \
964 product(bool, UseAltSigs, false, \
965 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
966 "internal signals. (Solaris only)") \
967 \
968 product(bool, UseSpinning, false, \
969 "Use spinning in monitor inflation and before entry") \
970 \
971 product(bool, PreSpinYield, false, \
972 "Yield before inner spinning loop") \
973 \
974 product(bool, PostSpinYield, true, \
975 "Yield after inner spinning loop") \
976 \
977 product(bool, AllowJNIEnvProxy, false, \
978 "Allow JNIEnv proxies for jdbx") \
979 \
980 product(bool, JNIDetachReleasesMonitors, true, \
981 "JNI DetachCurrentThread releases monitors owned by thread") \
982 \
983 product(bool, RestoreMXCSROnJNICalls, false, \
984 "Restore MXCSR when returning from JNI calls") \
985 \
986 product(bool, CheckJNICalls, false, \
987 "Verify all arguments to JNI calls") \
988 \
989 product(bool, UseFastJNIAccessors, true, \
990 "Use optimized versions of Get<Primitive>Field") \
991 \
992 product(bool, EagerXrunInit, false, \
993 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
994 " but not all -Xrun libraries may support the state of the VM at this time") \
995 \
996 product(bool, PreserveAllAnnotations, false, \
997 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
998 \
999 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
1000 "Number of OutOfMemoryErrors preallocated with backtrace") \
1001 \
1002 product(bool, LazyBootClassLoader, true, \
1003 "Enable/disable lazy opening of boot class path entries") \
1004 \
1005 diagnostic(bool, UseIncDec, true, \
1006 "Use INC, DEC instructions on x86") \
1007 \
1008 product(bool, UseNewLongLShift, false, \
1009 "Use optimized bitwise shift left") \
1010 \
1011 product(bool, UseStoreImmI16, true, \
1012 "Use store immediate 16-bits value instruction on x86") \
1013 \
1014 product(bool, UseAddressNop, false, \
1015 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \
1016 \
1017 product(bool, UseXmmLoadAndClearUpper, true, \
1018 "Load low part of XMM register and clear upper part") \
1019 \
1020 product(bool, UseXmmRegToRegMoveAll, false, \
1021 "Copy all XMM register bits when moving value between registers") \
1022 \
1023 product(bool, UseXmmI2D, false, \
1024 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \
1025 \
1026 product(bool, UseXmmI2F, false, \
1027 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \
1028 \
1029 product(bool, UseXMMForArrayCopy, false, \
1030 "Use SSE2 MOVQ instruction for Arraycopy") \
1031 \
1032 product(bool, UseUnalignedLoadStores, false, \
1033 "Use SSE2 MOVDQU instruction for Arraycopy") \
1034 \
1035 product(intx, FieldsAllocationStyle, 1, \
1036 "0 - type based with oops first, 1 - with oops last") \
1037 \
1038 product(bool, CompactFields, true, \
1039 "Allocate nonstatic fields in gaps between previous fields") \
1040 \
1041 notproduct(bool, PrintCompactFieldsSavings, false, \
1042 "Print how many words were saved with CompactFields") \
1043 \
1044 product(bool, UseBiasedLocking, true, \
1045 "Enable biased locking in JVM") \
1046 \
1047 product(intx, BiasedLockingStartupDelay, 4000, \
1048 "Number of milliseconds to wait before enabling biased locking") \
1049 \
1050 diagnostic(bool, PrintBiasedLockingStatistics, false, \
1051 "Print statistics of biased locking in JVM") \
1052 \
1053 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
1054 "Threshold of number of revocations per type to try to " \
1055 "rebias all objects in the heap of that type") \
1056 \
1057 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
1058 "Threshold of number of revocations per type to permanently " \
1059 "revoke biases of all objects in the heap of that type") \
1060 \
1061 product(intx, BiasedLockingDecayTime, 25000, \
1062 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
1063 "type after previous bulk rebias") \
1064 \
1065 /* tracing */ \
1066 \
1067 notproduct(bool, TraceRuntimeCalls, false, \
1068 "Trace run-time calls") \
1069 \
1070 develop(bool, TraceJNICalls, false, \
1071 "Trace JNI calls") \
1072 \
1073 notproduct(bool, TraceJVMCalls, false, \
1074 "Trace JVM calls") \
1075 \
1076 product(ccstr, TraceJVMTI, NULL, \
1077 "Trace flags for JVMTI functions and events") \
1078 \
1079 /* This option can change an EMCP method into an obsolete method. */ \
1080 /* This can affect tests that except specific methods to be EMCP. */ \
1081 /* This option should be used with caution. */ \
1082 product(bool, StressLdcRewrite, false, \
1083 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1084 \
1085 product(intx, TraceRedefineClasses, 0, \
1086 "Trace level for JVMTI RedefineClasses") \
1087 \
1088 /* change to false by default sometime after Mustang */ \
1089 product(bool, VerifyMergedCPBytecodes, true, \
1090 "Verify bytecodes after RedefineClasses constant pool merging") \
1091 \
1092 develop(bool, TraceJNIHandleAllocation, false, \
1093 "Trace allocation/deallocation of JNI handle blocks") \
1094 \
1095 develop(bool, TraceThreadEvents, false, \
1096 "Trace all thread events") \
1097 \
1098 develop(bool, TraceBytecodes, false, \
1099 "Trace bytecode execution") \
1100 \
1101 develop(bool, TraceClassInitialization, false, \
1102 "Trace class initialization") \
1103 \
1104 develop(bool, TraceExceptions, false, \
1105 "Trace exceptions") \
1106 \
1107 develop(bool, TraceICs, false, \
1108 "Trace inline cache changes") \
1109 \
1110 notproduct(bool, TraceInvocationCounterOverflow, false, \
1111 "Trace method invocation counter overflow") \
1112 \
1113 develop(bool, TraceInlineCacheClearing, false, \
1114 "Trace clearing of inline caches in nmethods") \
1115 \
1116 develop(bool, TraceDependencies, false, \
1117 "Trace dependencies") \
1118 \
1119 develop(bool, VerifyDependencies, trueInDebug, \
1120 "Exercise and verify the compilation dependency mechanism") \
1121 \
1122 develop(bool, TraceNewOopMapGeneration, false, \
1123 "Trace OopMapGeneration") \
1124 \
1125 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1126 "Trace OopMapGeneration: print detailed cell states") \
1127 \
1128 develop(bool, TimeOopMap, false, \
1129 "Time calls to GenerateOopMap::compute_map() in sum") \
1130 \
1131 develop(bool, TimeOopMap2, false, \
1132 "Time calls to GenerateOopMap::compute_map() individually") \
1133 \
1134 develop(bool, TraceMonitorMismatch, false, \
1135 "Trace monitor matching failures during OopMapGeneration") \
1136 \
1137 develop(bool, TraceOopMapRewrites, false, \
1138 "Trace rewritting of method oops during oop map generation") \
1139 \
1140 develop(bool, TraceSafepoint, false, \
1141 "Trace safepoint operations") \
1142 \
1143 develop(bool, TraceICBuffer, false, \
1144 "Trace usage of IC buffer") \
1145 \
1146 develop(bool, TraceCompiledIC, false, \
1147 "Trace changes of compiled IC") \
1148 \
1149 notproduct(bool, TraceZapDeadLocals, false, \
1150 "Trace zapping dead locals") \
1151 \
1152 develop(bool, TraceStartupTime, false, \
1153 "Trace setup time") \
1154 \
1155 develop(bool, TraceHPI, false, \
1156 "Trace Host Porting Interface (HPI)") \
1157 \
1158 product(ccstr, HPILibPath, NULL, \
1159 "Specify alternate path to HPI library") \
1160 \
1161 develop(bool, TraceProtectionDomainVerification, false, \
1162 "Trace protection domain verifcation") \
1163 \
1164 develop(bool, TraceClearedExceptions, false, \
1165 "Prints when an exception is forcibly cleared") \
1166 \
1167 product(bool, TraceClassResolution, false, \
1168 "Trace all constant pool resolutions (for debugging)") \
1169 \
1170 product(bool, TraceBiasedLocking, false, \
1171 "Trace biased locking in JVM") \
1172 \
1173 product(bool, TraceMonitorInflation, false, \
1174 "Trace monitor inflation in JVM") \
1175 \
1176 /* assembler */ \
1177 product(bool, Use486InstrsOnly, false, \
1178 "Use 80486 Compliant instruction subset") \
1179 \
1180 /* gc */ \
1181 \
1182 product(bool, UseSerialGC, false, \
1183 "Use the serial garbage collector") \
1184 \
1185 experimental(bool, UseG1GC, false, \
1186 "Use the Garbage-First garbage collector") \
1187 \
1188 product(bool, UseParallelGC, false, \
1189 "Use the Parallel Scavenge garbage collector") \
1190 \
1191 product(bool, UseParallelOldGC, false, \
1192 "Use the Parallel Old garbage collector") \
1193 \
1194 product(bool, UseParallelOldGCCompacting, true, \
1195 "In the Parallel Old garbage collector use parallel compaction") \
1196 \
1197 product(bool, UseParallelDensePrefixUpdate, true, \
1198 "In the Parallel Old garbage collector use parallel dense" \
1199 " prefix update") \
1200 \
1201 product(uintx, HeapMaximumCompactionInterval, 20, \
1202 "How often should we maximally compact the heap (not allowing " \
1203 "any dead space)") \
1204 \
1205 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1206 "The collection count for the first maximum compaction") \
1207 \
1208 product(bool, UseMaximumCompactionOnSystemGC, true, \
1209 "In the Parallel Old garbage collector maximum compaction for " \
1210 "a system GC") \
1211 \
1212 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1213 "The mean used by the par compact dead wood" \
1214 "limiter (a number between 0-100).") \
1215 \
1216 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1217 "The standard deviation used by the par compact dead wood" \
1218 "limiter (a number between 0-100).") \
1219 \
1220 product(bool, UseParallelOldGCDensePrefix, true, \
1221 "Use a dense prefix with the Parallel Old garbage collector") \
1222 \
1223 product(uintx, ParallelGCThreads, 0, \
1224 "Number of parallel threads parallel gc will use") \
1225 \
1226 product(uintx, ParallelCMSThreads, 0, \
1227 "Max number of threads CMS will use for concurrent work") \
1228 \
1229 develop(bool, ParallelOldGCSplitALot, false, \
1230 "Provoke splitting (copying data from a young gen space to" \
1231 "multiple destination spaces)") \
1232 \
1233 develop(uintx, ParallelOldGCSplitInterval, 3, \
1234 "How often to provoke splitting a young gen space") \
1235 \
1236 develop(bool, TraceRegionTasksQueuing, false, \
1237 "Trace the queuing of the region tasks") \
1238 \
1239 product(uintx, ParallelMarkingThreads, 0, \
1240 "Number of marking threads concurrent gc will use") \
1241 \
1242 product(uintx, YoungPLABSize, 4096, \
1243 "Size of young gen promotion labs (in HeapWords)") \
1244 \
1245 product(uintx, OldPLABSize, 1024, \
1246 "Size of old gen promotion labs (in HeapWords)") \
1247 \
1248 product(uintx, GCTaskTimeStampEntries, 200, \
1249 "Number of time stamp entries per gc worker thread") \
1250 \
1251 product(bool, AlwaysTenure, false, \
1252 "Always tenure objects in eden. (ParallelGC only)") \
1253 \
1254 product(bool, NeverTenure, false, \
1255 "Never tenure objects in eden, May tenure on overflow" \
1256 " (ParallelGC only)") \
1257 \
1258 product(bool, ScavengeBeforeFullGC, true, \
1259 "Scavenge youngest generation before each full GC," \
1260 " used with UseParallelGC") \
1261 \
1262 develop(bool, ScavengeWithObjectsInToSpace, false, \
1263 "Allow scavenges to occur when to_space contains objects.") \
1264 \
1265 product(bool, UseConcMarkSweepGC, false, \
1266 "Use Concurrent Mark-Sweep GC in the old generation") \
1267 \
1268 product(bool, ExplicitGCInvokesConcurrent, false, \
1269 "A System.gc() request invokes a concurrent collection;" \
1270 " (effective only when UseConcMarkSweepGC)") \
1271 \
1272 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1273 "A System.gc() request invokes a concurrent collection and" \
1274 " also unloads classes during such a concurrent gc cycle " \
1275 " (effective only when UseConcMarkSweepGC)") \
1276 \
1277 develop(bool, UseCMSAdaptiveFreeLists, true, \
1278 "Use Adaptive Free Lists in the CMS generation") \
1279 \
1280 develop(bool, UseAsyncConcMarkSweepGC, true, \
1281 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1282 \
1283 develop(bool, RotateCMSCollectionTypes, false, \
1284 "Rotate the CMS collections among concurrent and STW") \
1285 \
1286 product(bool, UseCMSBestFit, true, \
1287 "Use CMS best fit allocation strategy") \
1288 \
1289 product(bool, UseCMSCollectionPassing, true, \
1290 "Use passing of collection from background to foreground") \
1291 \
1292 product(bool, UseParNewGC, false, \
1293 "Use parallel threads in the new generation.") \
1294 \
1295 product(bool, ParallelGCVerbose, false, \
1296 "Verbose output for parallel GC.") \
1297 \
1298 product(intx, ParallelGCBufferWastePct, 10, \
1299 "wasted fraction of parallel allocation buffer.") \
1300 \
1301 product(bool, ParallelGCRetainPLAB, true, \
1302 "Retain parallel allocation buffers across scavenges.") \
1303 \
1304 product(intx, TargetPLABWastePct, 10, \
1305 "target wasted space in last buffer as pct of overall allocation")\
1306 \
1307 product(uintx, PLABWeight, 75, \
1308 "Percentage (0-100) used to weight the current sample when" \
1309 "computing exponentially decaying average for ResizePLAB.") \
1310 \
1311 product(bool, ResizePLAB, true, \
1312 "Dynamically resize (survivor space) promotion labs") \
1313 \
1314 product(bool, PrintPLAB, false, \
1315 "Print (survivor space) promotion labs sizing decisions") \
1316 \
1317 product(intx, ParGCArrayScanChunk, 50, \
1318 "Scan a subset and push remainder, if array is bigger than this") \
1319 \
1320 notproduct(bool, ParGCWorkQueueOverflowALot, false, \
1321 "Whether we should simulate work queue overflow in ParNew") \
1322 \
1323 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
1324 "An `interval' counter that determines how frequently" \
1325 " we simulate overflow; a smaller number increases frequency") \
1326 \
1327 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
1328 "The desired number of objects to claim from the overflow list") \
1329 \
1330 product(uintx, CMSParPromoteBlocksToClaim, 50, \
1331 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1332 "parallel GC.") \
1333 \
1334 product(bool, AlwaysPreTouch, false, \
1335 "It forces all freshly committed pages to be pre-touched.") \
1336 \
1337 product(bool, CMSUseOldDefaults, false, \
1338 "A flag temporarily introduced to allow reverting to some older" \
1339 "default settings; older as of 6.0 ") \
1340 \
1341 product(intx, CMSYoungGenPerWorker, 16*M, \
1342 "The amount of young gen chosen by default per GC worker " \
1343 "thread available ") \
1344 \
1345 product(bool, GCOverheadReporting, false, \
1346 "Enables the GC overhead reporting facility") \
1347 \
1348 product(intx, GCOverheadReportingPeriodMS, 100, \
1349 "Reporting period for conc GC overhead reporting, in ms ") \
1350 \
1351 product(bool, CMSIncrementalMode, false, \
1352 "Whether CMS GC should operate in \"incremental\" mode") \
1353 \
1354 product(uintx, CMSIncrementalDutyCycle, 10, \
1355 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1356 "CMSIncrementalPacing is enabled, then this is just the initial" \
1357 "value") \
1358 \
1359 product(bool, CMSIncrementalPacing, true, \
1360 "Whether the CMS incremental mode duty cycle should be " \
1361 "automatically adjusted") \
1362 \
1363 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1364 "Lower bound on the duty cycle when CMSIncrementalPacing is" \
1365 "enabled (a percentage, 0-100).") \
1366 \
1367 product(uintx, CMSIncrementalSafetyFactor, 10, \
1368 "Percentage (0-100) used to add conservatism when computing the" \
1369 "duty cycle.") \
1370 \
1371 product(uintx, CMSIncrementalOffset, 0, \
1372 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1373 "is shifted to the right within the period between young GCs") \
1374 \
1375 product(uintx, CMSExpAvgFactor, 25, \
1376 "Percentage (0-100) used to weight the current sample when" \
1377 "computing exponential averages for CMS statistics.") \
1378 \
1379 product(uintx, CMS_FLSWeight, 50, \
1380 "Percentage (0-100) used to weight the current sample when" \
1381 "computing exponentially decating averages for CMS FLS statistics.") \
1382 \
1383 product(uintx, CMS_FLSPadding, 2, \
1384 "The multiple of deviation from mean to use for buffering" \
1385 "against volatility in free list demand.") \
1386 \
1387 product(uintx, FLSCoalescePolicy, 2, \
1388 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1389 \
1390 product(uintx, CMS_SweepWeight, 50, \
1391 "Percentage (0-100) used to weight the current sample when" \
1392 "computing exponentially decaying average for inter-sweep duration.") \
1393 \
1394 product(uintx, CMS_SweepPadding, 2, \
1395 "The multiple of deviation from mean to use for buffering" \
1396 "against volatility in inter-sweep duration.") \
1397 \
1398 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1399 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1400 " duration exceeds this threhold in milliseconds") \
1401 \
1402 develop(bool, CMSTraceIncrementalMode, false, \
1403 "Trace CMS incremental mode") \
1404 \
1405 develop(bool, CMSTraceIncrementalPacing, false, \
1406 "Trace CMS incremental mode pacing computation") \
1407 \
1408 develop(bool, CMSTraceThreadState, false, \
1409 "Trace the CMS thread state (enable the trace_state() method)") \
1410 \
1411 product(bool, CMSClassUnloadingEnabled, false, \
1412 "Whether class unloading enabled when using CMS GC") \
1413 \
1414 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1415 "When CMS class unloading is enabled, the maximum CMS cycle count"\
1416 " for which classes may not be unloaded") \
1417 \
1418 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1419 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1420 \
1421 product(bool, UseCMSCompactAtFullCollection, true, \
1422 "Use mark sweep compact at full collections") \
1423 \
1424 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1425 "Number of CMS full collection done before compaction if > 0") \
1426 \
1427 develop(intx, CMSDictionaryChoice, 0, \
1428 "Use BinaryTreeDictionary as default in the CMS generation") \
1429 \
1430 product(uintx, CMSIndexedFreeListReplenish, 4, \
1431 "Replenish and indexed free list with this number of chunks") \
1432 \
1433 product(bool, CMSLoopWarn, false, \
1434 "Warn in case of excessive CMS looping") \
1435 \
1436 develop(bool, CMSOverflowEarlyRestoration, false, \
1437 "Whether preserved marks should be restored early") \
1438 \
1439 product(uintx, CMSMarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
1440 "Size of CMS marking stack") \
1441 \
1442 product(uintx, CMSMarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
1443 "Max size of CMS marking stack") \
1444 \
1445 notproduct(bool, CMSMarkStackOverflowALot, false, \
1446 "Whether we should simulate frequent marking stack / work queue" \
1447 " overflow") \
1448 \
1449 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
1450 "An `interval' counter that determines how frequently" \
1451 " we simulate overflow; a smaller number increases frequency") \
1452 \
1453 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1454 "(Temporary, subject to experimentation)" \
1455 "Maximum number of abortable preclean iterations, if > 0") \
1456 \
1457 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1458 "(Temporary, subject to experimentation)" \
1459 "Maximum time in abortable preclean in ms") \
1460 \
1461 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1462 "(Temporary, subject to experimentation)" \
1463 "Nominal minimum work per abortable preclean iteration") \
1464 \
1465 product(intx, CMSAbortablePrecleanWaitMillis, 100, \
1466 "(Temporary, subject to experimentation)" \
1467 " Time that we sleep between iterations when not given" \
1468 " enough work per iteration") \
1469 \
1470 product(uintx, CMSRescanMultiple, 32, \
1471 "Size (in cards) of CMS parallel rescan task") \
1472 \
1473 product(uintx, CMSConcMarkMultiple, 32, \
1474 "Size (in cards) of CMS concurrent MT marking task") \
1475 \
1476 product(uintx, CMSRevisitStackSize, 1*M, \
1477 "Size of CMS KlassKlass revisit stack") \
1478 \
1479 product(bool, CMSAbortSemantics, false, \
1480 "Whether abort-on-overflow semantics is implemented") \
1481 \
1482 product(bool, CMSParallelRemarkEnabled, true, \
1483 "Whether parallel remark enabled (only if ParNewGC)") \
1484 \
1485 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1486 "Whether parallel remark of survivor space" \
1487 " enabled (effective only if CMSParallelRemarkEnabled)") \
1488 \
1489 product(bool, CMSPLABRecordAlways, true, \
1490 "Whether to always record survivor space PLAB bdries" \
1491 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1492 \
1493 product(bool, CMSConcurrentMTEnabled, true, \
1494 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1495 \
1496 product(bool, CMSPermGenPrecleaningEnabled, true, \
1497 "Whether concurrent precleaning enabled in perm gen" \
1498 " (effective only when CMSPrecleaningEnabled is true)") \
1499 \
1500 product(bool, CMSPrecleaningEnabled, true, \
1501 "Whether concurrent precleaning enabled") \
1502 \
1503 product(uintx, CMSPrecleanIter, 3, \
1504 "Maximum number of precleaning iteration passes") \
1505 \
1506 product(uintx, CMSPrecleanNumerator, 2, \
1507 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1508 " ratio") \
1509 \
1510 product(uintx, CMSPrecleanDenominator, 3, \
1511 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1512 " ratio") \
1513 \
1514 product(bool, CMSPrecleanRefLists1, true, \
1515 "Preclean ref lists during (initial) preclean phase") \
1516 \
1517 product(bool, CMSPrecleanRefLists2, false, \
1518 "Preclean ref lists during abortable preclean phase") \
1519 \
1520 product(bool, CMSPrecleanSurvivors1, false, \
1521 "Preclean survivors during (initial) preclean phase") \
1522 \
1523 product(bool, CMSPrecleanSurvivors2, true, \
1524 "Preclean survivors during abortable preclean phase") \
1525 \
1526 product(uintx, CMSPrecleanThreshold, 1000, \
1527 "Don't re-iterate if #dirty cards less than this") \
1528 \
1529 product(bool, CMSCleanOnEnter, true, \
1530 "Clean-on-enter optimization for reducing number of dirty cards") \
1531 \
1532 product(uintx, CMSRemarkVerifyVariant, 1, \
1533 "Choose variant (1,2) of verification following remark") \
1534 \
1535 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1536 "If Eden used is below this value, don't try to schedule remark") \
1537 \
1538 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1539 "The Eden occupancy % at which to try and schedule remark pause") \
1540 \
1541 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1542 "Start sampling Eden top at least before yg occupancy reaches" \
1543 " 1/<ratio> of the size at which we plan to schedule remark") \
1544 \
1545 product(uintx, CMSSamplingGrain, 16*K, \
1546 "The minimum distance between eden samples for CMS (see above)") \
1547 \
1548 product(bool, CMSScavengeBeforeRemark, false, \
1549 "Attempt scavenge before the CMS remark step") \
1550 \
1551 develop(bool, CMSTraceSweeper, false, \
1552 "Trace some actions of the CMS sweeper") \
1553 \
1554 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1555 "Don't drain below this size per parallel worker/thief") \
1556 \
1557 product(intx, CMSWaitDuration, 2000, \
1558 "Time in milliseconds that CMS thread waits for young GC") \
1559 \
1560 product(bool, CMSYield, true, \
1561 "Yield between steps of concurrent mark & sweep") \
1562 \
1563 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1564 "Bitmap operations should process at most this many bits" \
1565 "between yields") \
1566 \
1567 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1568 "Verify that all refs across the FLS boundary " \
1569 " are to valid objects") \
1570 \
1571 diagnostic(bool, FLSVerifyLists, false, \
1572 "Do lots of (expensive) FreeListSpace verification") \
1573 \
1574 diagnostic(bool, FLSVerifyIndexTable, false, \
1575 "Do lots of (expensive) FLS index table verification") \
1576 \
1577 develop(bool, FLSVerifyDictionary, false, \
1578 "Do lots of (expensive) FLS dictionary verification") \
1579 \
1580 develop(bool, VerifyBlockOffsetArray, false, \
1581 "Do (expensive!) block offset array verification") \
1582 \
1583 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \
1584 "Maintain _unallocated_block in BlockOffsetArray" \
1585 " (currently applicable only to CMS collector)") \
1586 \
1587 develop(bool, TraceCMSState, false, \
1588 "Trace the state of the CMS collection") \
1589 \
1590 product(intx, RefDiscoveryPolicy, 0, \
1591 "Whether reference-based(0) or referent-based(1)") \
1592 \
1593 product(bool, ParallelRefProcEnabled, false, \
1594 "Enable parallel reference processing whenever possible") \
1595 \
1596 product(bool, ParallelRefProcBalancingEnabled, true, \
1597 "Enable balancing of reference processing queues") \
1598 \
1599 product(intx, CMSTriggerRatio, 80, \
1600 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1601 " allocated before a CMS collection cycle commences") \
1602 \
1603 product(intx, CMSTriggerPermRatio, 80, \
1604 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \
1605 " is allocated before a CMS collection cycle commences, that " \
1606 " also collects the perm generation") \
1607 \
1608 product(uintx, CMSBootstrapOccupancy, 50, \
1609 "Percentage CMS generation occupancy at which to " \
1610 " initiate CMS collection for bootstrapping collection stats") \
1611 \
1612 product(intx, CMSInitiatingOccupancyFraction, -1, \
1613 "Percentage CMS generation occupancy to start a CMS collection " \
1614 " cycle (A negative value means that CMSTriggerRatio is used)") \
1615 \
1616 product(intx, CMSInitiatingPermOccupancyFraction, -1, \
1617 "Percentage CMS perm generation occupancy to start a CMScollection"\
1618 " cycle (A negative value means that CMSTriggerPermRatio is used)")\
1619 \
1620 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1621 "Only use occupancy as a crierion for starting a CMS collection") \
1622 \
1623 product(intx, CMSIsTooFullPercentage, 98, \
1624 "An absolute ceiling above which CMS will always consider the" \
1625 " perm gen ripe for collection") \
1626 \
1627 develop(bool, CMSTestInFreeList, false, \
1628 "Check if the coalesced range is already in the " \
1629 "free lists as claimed.") \
1630 \
1631 notproduct(bool, CMSVerifyReturnedBytes, false, \
1632 "Check that all the garbage collected was returned to the " \
1633 "free lists.") \
1634 \
1635 notproduct(bool, ScavengeALot, false, \
1636 "Force scavenge at every Nth exit from the runtime system " \
1637 "(N=ScavengeALotInterval)") \
1638 \
1639 develop(bool, FullGCALot, false, \
1640 "Force full gc at every Nth exit from the runtime system " \
1641 "(N=FullGCALotInterval)") \
1642 \
1643 notproduct(bool, GCALotAtAllSafepoints, false, \
1644 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1645 \
1646 product(bool, HandlePromotionFailure, true, \
1647 "The youngest generation collection does not require" \
1648 " a guarantee of full promotion of all live objects.") \
1649 \
1650 notproduct(bool, PromotionFailureALot, false, \
1651 "Use promotion failure handling on every youngest generation " \
1652 "collection") \
1653 \
1654 develop(uintx, PromotionFailureALotCount, 1000, \
1655 "Number of promotion failures occurring at ParGCAllocBuffer" \
1656 "refill attempts (ParNew) or promotion attempts " \
1657 "(other young collectors) ") \
1658 \
1659 develop(uintx, PromotionFailureALotInterval, 5, \
1660 "Total collections between promotion failures alot") \
1661 \
1662 develop(intx, WorkStealingSleepMillis, 1, \
1663 "Sleep time when sleep is used for yields") \
1664 \
1665 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \
1666 "Number of yields before a sleep is done during workstealing") \
1667 \
1668 develop(uintx, WorkStealingHardSpins, 4096, \
1669 "Number of iterations in a spin loop between checks on " \
1670 "time out of hard spin") \
1671 \
1672 develop(uintx, WorkStealingSpinToYieldRatio, 10, \
1673 "Ratio of hard spins to calls to yield") \
1674 \
1675 product(uintx, PreserveMarkStackSize, 1024, \
1676 "Size for stack used in promotion failure handling") \
1677 \
1678 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
1679 \
1680 product_pd(bool, ResizeTLAB, \
1681 "Dynamically resize tlab size for threads") \
1682 \
1683 product(bool, ZeroTLAB, false, \
1684 "Zero out the newly created TLAB") \
1685 \
1686 product(bool, FastTLABRefill, true, \
1687 "Use fast TLAB refill code") \
1688 \
1689 product(bool, PrintTLAB, false, \
1690 "Print various TLAB related information") \
1691 \
1692 product(bool, TLABStats, true, \
1693 "Print various TLAB related information") \
1694 \
1695 product_pd(bool, NeverActAsServerClassMachine, \
1696 "Never act like a server-class machine") \
1697 \
1698 product(bool, AlwaysActAsServerClassMachine, false, \
1699 "Always act like a server-class machine") \
1700 \
1701 product_pd(uintx, DefaultMaxRAM, \
1702 "Maximum real memory size for setting server class heap size") \
1703 \
1704 product(uintx, DefaultMaxRAMFraction, 4, \
1705 "Fraction (1/n) of real memory used for server class max heap") \
1706 \
1707 product(uintx, DefaultInitialRAMFraction, 64, \
1708 "Fraction (1/n) of real memory used for server class initial heap") \
1709 \
1710 product(bool, UseAutoGCSelectPolicy, false, \
1711 "Use automatic collection selection policy") \
1712 \
1713 product(uintx, AutoGCSelectPauseMillis, 5000, \
1714 "Automatic GC selection pause threshhold in ms") \
1715 \
1716 product(bool, UseAdaptiveSizePolicy, true, \
1717 "Use adaptive generation sizing policies") \
1718 \
1719 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
1720 "Use adaptive survivor sizing policies") \
1721 \
1722 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
1723 "Use adaptive young-old sizing policies at minor collections") \
1724 \
1725 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
1726 "Use adaptive young-old sizing policies at major collections") \
1727 \
1728 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
1729 "Use statistics from System.GC for adaptive size policy") \
1730 \
1731 product(bool, UseAdaptiveGCBoundary, false, \
1732 "Allow young-old boundary to move") \
1733 \
1734 develop(bool, TraceAdaptiveGCBoundary, false, \
1735 "Trace young-old boundary moves") \
1736 \
1737 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
1738 "Resize the virtual spaces of the young or old generations") \
1739 \
1740 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
1741 "Policy for changeing generation size for throughput goals") \
1742 \
1743 product(uintx, AdaptiveSizePausePolicy, 0, \
1744 "Policy for changing generation size for pause goals") \
1745 \
1746 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
1747 "Adjust tenured generation to achive a minor pause goal") \
1748 \
1749 develop(bool, PSAdjustYoungGenForMajorPause, false, \
1750 "Adjust young generation to achive a major pause goal") \
1751 \
1752 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
1753 "Number of steps where heuristics is used before data is used") \
1754 \
1755 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
1756 "Number of collections before the adaptive sizing is started") \
1757 \
1758 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
1759 "Collecton interval for printing information, zero => never") \
1760 \
1761 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
1762 "Use adaptive minimum footprint as a goal") \
1763 \
1764 product(uintx, AdaptiveSizePolicyWeight, 10, \
1765 "Weight given to exponential resizing, between 0 and 100") \
1766 \
1767 product(uintx, AdaptiveTimeWeight, 25, \
1768 "Weight given to time in adaptive policy, between 0 and 100") \
1769 \
1770 product(uintx, PausePadding, 1, \
1771 "How much buffer to keep for pause time") \
1772 \
1773 product(uintx, PromotedPadding, 3, \
1774 "How much buffer to keep for promotion failure") \
1775 \
1776 product(uintx, SurvivorPadding, 3, \
1777 "How much buffer to keep for survivor overflow") \
1778 \
1779 product(uintx, AdaptivePermSizeWeight, 20, \
1780 "Weight for perm gen exponential resizing, between 0 and 100") \
1781 \
1782 product(uintx, PermGenPadding, 3, \
1783 "How much buffer to keep for perm gen sizing") \
1784 \
1785 product(uintx, ThresholdTolerance, 10, \
1786 "Allowed collection cost difference between generations") \
1787 \
1788 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
1789 "If collection costs are within margin, reduce both by full delta") \
1790 \
1791 product(uintx, YoungGenerationSizeIncrement, 20, \
1792 "Adaptive size percentage change in young generation") \
1793 \
1794 product(uintx, YoungGenerationSizeSupplement, 80, \
1795 "Supplement to YoungedGenerationSizeIncrement used at startup") \
1796 \
1797 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
1798 "Decay factor to YoungedGenerationSizeSupplement") \
1799 \
1800 product(uintx, TenuredGenerationSizeIncrement, 20, \
1801 "Adaptive size percentage change in tenured generation") \
1802 \
1803 product(uintx, TenuredGenerationSizeSupplement, 80, \
1804 "Supplement to TenuredGenerationSizeIncrement used at startup") \
1805 \
1806 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
1807 "Decay factor to TenuredGenerationSizeIncrement") \
1808 \
1809 product(uintx, MaxGCPauseMillis, max_uintx, \
1810 "Adaptive size policy maximum GC pause time goal in msec") \
1811 \
1812 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
1813 "Adaptive size policy maximum GC minor pause time goal in msec") \
1814 \
1815 product(uintx, GCTimeRatio, 99, \
1816 "Adaptive size policy application time to GC time ratio") \
1817 \
1818 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
1819 "Adaptive size scale down factor for shrinking") \
1820 \
1821 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
1822 "Adaptive size decays the major cost for long major intervals") \
1823 \
1824 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
1825 "Time scale over which major costs decay") \
1826 \
1827 product(uintx, MinSurvivorRatio, 3, \
1828 "Minimum ratio of young generation/survivor space size") \
1829 \
1830 product(uintx, InitialSurvivorRatio, 8, \
1831 "Initial ratio of eden/survivor space size") \
1832 \
1833 product(uintx, BaseFootPrintEstimate, 256*M, \
1834 "Estimate of footprint other than Java Heap") \
1835 \
1836 product(bool, UseGCOverheadLimit, true, \
1837 "Use policy to limit of proportion of time spent in GC " \
1838 "before an OutOfMemory error is thrown") \
1839 \
1840 product(uintx, GCTimeLimit, 98, \
1841 "Limit of proportion of time spent in GC before an OutOfMemory" \
1842 "error is thrown (used with GCHeapFreeLimit)") \
1843 \
1844 product(uintx, GCHeapFreeLimit, 2, \
1845 "Minimum percentage of free space after a full GC before an " \
1846 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
1847 \
1848 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
1849 "Number of consecutive collections before gc time limit fires") \
1850 \
1851 product(bool, PrintAdaptiveSizePolicy, false, \
1852 "Print information about AdaptiveSizePolicy") \
1853 \
1854 product(intx, PrefetchCopyIntervalInBytes, -1, \
1855 "How far ahead to prefetch destination area (<= 0 means off)") \
1856 \
1857 product(intx, PrefetchScanIntervalInBytes, -1, \
1858 "How far ahead to prefetch scan area (<= 0 means off)") \
1859 \
1860 product(intx, PrefetchFieldsAhead, -1, \
1861 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
1862 \
1863 develop(bool, UsePrefetchQueue, true, \
1864 "Use the prefetch queue during PS promotion") \
1865 \
1866 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
1867 "Verify system before exiting") \
1868 \
1869 diagnostic(bool, VerifyBeforeGC, false, \
1870 "Verify memory system before GC") \
1871 \
1872 diagnostic(bool, VerifyAfterGC, false, \
1873 "Verify memory system after GC") \
1874 \
1875 diagnostic(bool, VerifyDuringGC, false, \
1876 "Verify memory system during GC (between phases)") \
1877 \
1878 diagnostic(bool, GCParallelVerificationEnabled, true, \
1879 "Enable parallel memory system verification") \
1880 \
1881 diagnostic(bool, VerifyRememberedSets, false, \
1882 "Verify GC remembered sets") \
1883 \
1884 diagnostic(bool, VerifyObjectStartArray, true, \
1885 "Verify GC object start array if verify before/after") \
1886 \
1887 product(bool, DisableExplicitGC, false, \
1888 "Tells whether calling System.gc() does a full GC") \
1889 \
1890 notproduct(bool, CheckMemoryInitialization, false, \
1891 "Checks memory initialization") \
1892 \
1893 product(bool, CollectGen0First, false, \
1894 "Collect youngest generation before each full GC") \
1895 \
1896 diagnostic(bool, BindCMSThreadToCPU, false, \
1897 "Bind CMS Thread to CPU if possible") \
1898 \
1899 diagnostic(uintx, CPUForCMSThread, 0, \
1900 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
1901 \
1902 product(bool, BindGCTaskThreadsToCPUs, false, \
1903 "Bind GCTaskThreads to CPUs if possible") \
1904 \
1905 product(bool, UseGCTaskAffinity, false, \
1906 "Use worker affinity when asking for GCTasks") \
1907 \
1908 product(uintx, ProcessDistributionStride, 4, \
1909 "Stride through processors when distributing processes") \
1910 \
1911 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
1912 "number of times the coordinator GC thread will sleep while " \
1913 "yielding before giving up and resuming GC") \
1914 \
1915 product(uintx, CMSYieldSleepCount, 0, \
1916 "number of times a GC thread (minus the coordinator) " \
1917 "will sleep while yielding before giving up and resuming GC") \
1918 \
1919 notproduct(bool, PrintFlagsFinal, false, \
1920 "Print all command line flags after argument processing") \
1921 \
1922 /* gc tracing */ \
1923 manageable(bool, PrintGC, false, \
1924 "Print message at garbage collect") \
1925 \
1926 manageable(bool, PrintGCDetails, false, \
1927 "Print more details at garbage collect") \
1928 \
1929 manageable(bool, PrintGCDateStamps, false, \
1930 "Print date stamps at garbage collect") \
1931 \
1932 manageable(bool, PrintGCTimeStamps, false, \
1933 "Print timestamps at garbage collect") \
1934 \
1935 product(bool, PrintGCTaskTimeStamps, false, \
1936 "Print timestamps for individual gc worker thread tasks") \
1937 \
1938 develop(intx, ConcGCYieldTimeout, 0, \
1939 "If non-zero, assert that GC threads yield within this # of ms.") \
1940 \
1941 notproduct(bool, TraceMarkSweep, false, \
1942 "Trace mark sweep") \
1943 \
1944 product(bool, PrintReferenceGC, false, \
1945 "Print times spent handling reference objects during GC " \
1946 " (enabled only when PrintGCDetails)") \
1947 \
1948 develop(bool, TraceReferenceGC, false, \
1949 "Trace handling of soft/weak/final/phantom references") \
1950 \
1951 develop(bool, TraceFinalizerRegistration, false, \
1952 "Trace registration of final references") \
1953 \
1954 notproduct(bool, TraceScavenge, false, \
1955 "Trace scavenge") \
1956 \
1957 product_rw(bool, TraceClassLoading, false, \
1958 "Trace all classes loaded") \
1959 \
1960 product(bool, TraceClassLoadingPreorder, false, \
1961 "Trace all classes loaded in order referenced (not loaded)") \
1962 \
1963 product_rw(bool, TraceClassUnloading, false, \
1964 "Trace unloading of classes") \
1965 \
1966 product_rw(bool, TraceLoaderConstraints, false, \
1967 "Trace loader constraints") \
1968 \
1969 product(bool, TraceGen0Time, false, \
1970 "Trace accumulated time for Gen 0 collection") \
1971 \
1972 product(bool, TraceGen1Time, false, \
1973 "Trace accumulated time for Gen 1 collection") \
1974 \
1975 product(bool, PrintTenuringDistribution, false, \
1976 "Print tenuring age information") \
1977 \
1978 product_rw(bool, PrintHeapAtGC, false, \
1979 "Print heap layout before and after each GC") \
1980 \
1981 product(bool, PrintHeapAtSIGBREAK, true, \
1982 "Print heap layout in response to SIGBREAK") \
1983 \
1984 manageable(bool, PrintClassHistogramBeforeFullGC, false, \
1985 "Print a class histogram before any major stop-world GC") \
1986 \
1987 manageable(bool, PrintClassHistogramAfterFullGC, false, \
1988 "Print a class histogram after any major stop-world GC") \
1989 \
1990 manageable(bool, PrintClassHistogram, false, \
1991 "Print a histogram of class instances") \
1992 \
1993 develop(bool, TraceWorkGang, false, \
1994 "Trace activities of work gangs") \
1995 \
1996 product(bool, TraceParallelOldGCTasks, false, \
1997 "Trace multithreaded GC activity") \
1998 \
1999 develop(bool, TraceBlockOffsetTable, false, \
2000 "Print BlockOffsetTable maps") \
2001 \
2002 develop(bool, TraceCardTableModRefBS, false, \
2003 "Print CardTableModRefBS maps") \
2004 \
2005 develop(bool, TraceGCTaskManager, false, \
2006 "Trace actions of the GC task manager") \
2007 \
2008 develop(bool, TraceGCTaskQueue, false, \
2009 "Trace actions of the GC task queues") \
2010 \
2011 develop(bool, TraceGCTaskThread, false, \
2012 "Trace actions of the GC task threads") \
2013 \
2014 product(bool, PrintParallelOldGCPhaseTimes, false, \
2015 "Print the time taken by each parallel old gc phase." \
2016 "PrintGCDetails must also be enabled.") \
2017 \
2018 develop(bool, TraceParallelOldGCMarkingPhase, false, \
2019 "Trace parallel old gc marking phase") \
2020 \
2021 develop(bool, TraceParallelOldGCSummaryPhase, false, \
2022 "Trace parallel old gc summary phase") \
2023 \
2024 develop(bool, TraceParallelOldGCCompactionPhase, false, \
2025 "Trace parallel old gc compaction phase") \
2026 \
2027 develop(bool, TraceParallelOldGCDensePrefix, false, \
2028 "Trace parallel old gc dense prefix computation") \
2029 \
2030 develop(bool, IgnoreLibthreadGPFault, false, \
2031 "Suppress workaround for libthread GP fault") \
2032 \
2033 product(bool, PrintJNIGCStalls, false, \
2034 "Print diagnostic message when GC is stalled" \
2035 "by JNI critical section") \
2036 \
2037 /* JVMTI heap profiling */ \
2038 \
2039 diagnostic(bool, TraceJVMTIObjectTagging, false, \
2040 "Trace JVMTI object tagging calls") \
2041 \
2042 diagnostic(bool, VerifyBeforeIteration, false, \
2043 "Verify memory system before JVMTI iteration") \
2044 \
2045 /* compiler interface */ \
2046 \
2047 develop(bool, CIPrintCompilerName, false, \
2048 "when CIPrint is active, print the name of the active compiler") \
2049 \
2050 develop(bool, CIPrintCompileQueue, false, \
2051 "display the contents of the compile queue whenever a " \
2052 "compilation is enqueued") \
2053 \
2054 develop(bool, CIPrintRequests, false, \
2055 "display every request for compilation") \
2056 \
2057 product(bool, CITime, false, \
2058 "collect timing information for compilation") \
2059 \
2060 develop(bool, CITimeEach, false, \
2061 "display timing information after each successful compilation") \
2062 \
2063 develop(bool, CICountOSR, true, \
2064 "use a separate counter when assigning ids to osr compilations") \
2065 \
2066 develop(bool, CICompileNatives, true, \
2067 "compile native methods if supported by the compiler") \
2068 \
2069 develop_pd(bool, CICompileOSR, \
2070 "compile on stack replacement methods if supported by the " \
2071 "compiler") \
2072 \
2073 develop(bool, CIPrintMethodCodes, false, \
2074 "print method bytecodes of the compiled code") \
2075 \
2076 develop(bool, CIPrintTypeFlow, false, \
2077 "print the results of ciTypeFlow analysis") \
2078 \
2079 develop(bool, CITraceTypeFlow, false, \
2080 "detailed per-bytecode tracing of ciTypeFlow analysis") \
2081 \
2082 develop(intx, CICloneLoopTestLimit, 100, \
2083 "size limit for blocks heuristically cloned in ciTypeFlow") \
2084 \
2085 /* temp diagnostics */ \
2086 \
2087 diagnostic(bool, TraceRedundantCompiles, false, \
2088 "Have compile broker print when a request already in the queue is"\
2089 " requested again") \
2090 \
2091 diagnostic(bool, InitialCompileFast, false, \
2092 "Initial compile at CompLevel_fast_compile") \
2093 \
2094 diagnostic(bool, InitialCompileReallyFast, false, \
2095 "Initial compile at CompLevel_really_fast_compile (no profile)") \
2096 \
2097 diagnostic(bool, FullProfileOnReInterpret, true, \
2098 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\
2099 \
2100 /* compiler */ \
2101 \
2102 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
2103 "Number of compiler threads to run") \
2104 \
2105 product(intx, CompilationPolicyChoice, 0, \
2106 "which compilation policy (0/1)") \
2107 \
2108 develop(bool, UseStackBanging, true, \
2109 "use stack banging for stack overflow checks (required for " \
2110 "proper StackOverflow handling; disable only to measure cost " \
2111 "of stackbanging)") \
2112 \
2113 develop(bool, Use24BitFPMode, true, \
2114 "Set 24-bit FPU mode on a per-compile basis ") \
2115 \
2116 develop(bool, Use24BitFP, true, \
2117 "use FP instructions that produce 24-bit precise results") \
2118 \
2119 develop(bool, UseStrictFP, true, \
2120 "use strict fp if modifier strictfp is set") \
2121 \
2122 develop(bool, GenerateSynchronizationCode, true, \
2123 "generate locking/unlocking code for synchronized methods and " \
2124 "monitors") \
2125 \
2126 develop(bool, GenerateCompilerNullChecks, true, \
2127 "Generate explicit null checks for loads/stores/calls") \
2128 \
2129 develop(bool, GenerateRangeChecks, true, \
2130 "Generate range checks for array accesses") \
2131 \
2132 develop_pd(bool, ImplicitNullChecks, \
2133 "generate code for implicit null checks") \
2134 \
2135 product(bool, PrintSafepointStatistics, false, \
2136 "print statistics about safepoint synchronization") \
2137 \
2138 product(intx, PrintSafepointStatisticsCount, 300, \
2139 "total number of safepoint statistics collected " \
2140 "before printing them out") \
2141 \
2142 product(intx, PrintSafepointStatisticsTimeout, -1, \
2143 "print safepoint statistics only when safepoint takes" \
2144 " more than PrintSafepointSatisticsTimeout in millis") \
2145 \
2146 develop(bool, InlineAccessors, true, \
2147 "inline accessor methods (get/set)") \
2148 \
2149 product(bool, Inline, true, \
2150 "enable inlining") \
2151 \
2152 product(bool, ClipInlining, true, \
2153 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2154 \
2155 develop(bool, UseCHA, true, \
2156 "enable CHA") \
2157 \
2158 product(bool, UseTypeProfile, true, \
2159 "Check interpreter profile for historically monomorphic calls") \
2160 \
2161 product(intx, TypeProfileMajorReceiverPercent, 90, \
2162 "% of major receiver type to all profiled receivers") \
2163 \
2164 notproduct(bool, TimeCompiler, false, \
2165 "time the compiler") \
2166 \
2167 notproduct(bool, TimeCompiler2, false, \
2168 "detailed time the compiler (requires +TimeCompiler)") \
2169 \
2170 diagnostic(bool, PrintInlining, false, \
2171 "prints inlining optimizations") \
2172 \
2173 diagnostic(bool, PrintIntrinsics, false, \
2174 "prints attempted and successful inlining of intrinsics") \
2175 \
2176 product(bool, UsePopCountInstruction, false, \
2177 "Use population count instruction") \
2178 \
2179 diagnostic(ccstrlist, DisableIntrinsic, "", \
2180 "do not expand intrinsics whose (internal) names appear here") \
2181 \
2182 develop(bool, StressReflectiveCode, false, \
2183 "Use inexact types at allocations, etc., to test reflection") \
2184 \
2185 develop(bool, EagerInitialization, false, \
2186 "Eagerly initialize classes if possible") \
2187 \
2188 product(bool, Tier1UpdateMethodData, trueInTiered, \
2189 "Update methodDataOops in Tier1-generated code") \
2190 \
2191 develop(bool, TraceMethodReplacement, false, \
2192 "Print when methods are replaced do to recompilation") \
2193 \
2194 develop(bool, PrintMethodFlushing, false, \
2195 "print the nmethods being flushed") \
2196 \
2197 notproduct(bool, LogMultipleMutexLocking, false, \
2198 "log locking and unlocking of mutexes (only if multiple locks " \
2199 "are held)") \
2200 \
2201 develop(bool, UseRelocIndex, false, \
2202 "use an index to speed random access to relocations") \
2203 \
2204 develop(bool, StressCodeBuffers, false, \
2205 "Exercise code buffer expansion and other rare state changes") \
2206 \
2207 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2208 "Generate extra debugging info for non-safepoints in nmethods") \
2209 \
2210 diagnostic(bool, DebugInlinedCalls, true, \
2211 "If false, restricts profiled locations to the root method only") \
2212 \
2213 product(bool, PrintVMOptions, trueInDebug, \
2214 "print VM flag settings") \
2215 \
2216 product(bool, IgnoreUnrecognizedVMOptions, false, \
2217 "Ignore unrecognized VM options") \
2218 \
2219 diagnostic(bool, SerializeVMOutput, true, \
2220 "Use a mutex to serialize output to tty and hotspot.log") \
2221 \
2222 diagnostic(bool, DisplayVMOutput, true, \
2223 "Display all VM output on the tty, independently of LogVMOutput") \
2224 \
2225 diagnostic(bool, LogVMOutput, trueInDebug, \
2226 "Save VM output to hotspot.log, or to LogFile") \
2227 \
2228 diagnostic(ccstr, LogFile, NULL, \
2229 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2230 \
2231 product(ccstr, ErrorFile, NULL, \
2232 "If an error occurs, save the error data to this file " \
2233 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2234 \
2235 product(bool, DisplayVMOutputToStderr, false, \
2236 "If DisplayVMOutput is true, display all VM output to stderr") \
2237 \
2238 product(bool, DisplayVMOutputToStdout, false, \
2239 "If DisplayVMOutput is true, display all VM output to stdout") \
2240 \
2241 product(bool, UseHeavyMonitors, false, \
2242 "use heavyweight instead of lightweight Java monitors") \
2243 \
2244 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2245 "print histogram of the symbol table") \
2246 \
2247 notproduct(bool, ExitVMOnVerifyError, false, \
2248 "standard exit from VM if bytecode verify error " \
2249 "(only in debug mode)") \
2250 \
2251 notproduct(ccstr, AbortVMOnException, NULL, \
2252 "Call fatal if this exception is thrown. Example: " \
2253 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2254 \
2255 develop(bool, DebugVtables, false, \
2256 "add debugging code to vtable dispatch") \
2257 \
2258 develop(bool, PrintVtables, false, \
2259 "print vtables when printing klass") \
2260 \
2261 notproduct(bool, PrintVtableStats, false, \
2262 "print vtables stats at end of run") \
2263 \
2264 develop(bool, TraceCreateZombies, false, \
2265 "trace creation of zombie nmethods") \
2266 \
2267 notproduct(bool, IgnoreLockingAssertions, false, \
2268 "disable locking assertions (for speed)") \
2269 \
2270 notproduct(bool, VerifyLoopOptimizations, false, \
2271 "verify major loop optimizations") \
2272 \
2273 product(bool, RangeCheckElimination, true, \
2274 "Split loop iterations to eliminate range checks") \
2275 \
2276 develop_pd(bool, UncommonNullCast, \
2277 "track occurrences of null in casts; adjust compiler tactics") \
2278 \
2279 develop(bool, TypeProfileCasts, true, \
2280 "treat casts like calls for purposes of type profiling") \
2281 \
2282 develop(bool, MonomorphicArrayCheck, true, \
2283 "Uncommon-trap array store checks that require full type check") \
2284 \
2285 develop(bool, DelayCompilationDuringStartup, true, \
2286 "Delay invoking the compiler until main application class is " \
2287 "loaded") \
2288 \
2289 develop(bool, CompileTheWorld, false, \
2290 "Compile all methods in all classes in bootstrap class path " \
2291 "(stress test)") \
2292 \
2293 develop(bool, CompileTheWorldPreloadClasses, true, \
2294 "Preload all classes used by a class before start loading") \
2295 \
2296 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \
2297 "Compile all methods although class initializer failed") \
2298 \
2299 develop(bool, TraceIterativeGVN, false, \
2300 "Print progress during Iterative Global Value Numbering") \
2301 \
2302 develop(bool, FillDelaySlots, true, \
2303 "Fill delay slots (on SPARC only)") \
2304 \
2305 develop(bool, VerifyIterativeGVN, false, \
2306 "Verify Def-Use modifications during sparse Iterative Global " \
2307 "Value Numbering") \
2308 \
2309 notproduct(bool, TracePhaseCCP, false, \
2310 "Print progress during Conditional Constant Propagation") \
2311 \
2312 develop(bool, TimeLivenessAnalysis, false, \
2313 "Time computation of bytecode liveness analysis") \
2314 \
2315 develop(bool, TraceLivenessGen, false, \
2316 "Trace the generation of liveness analysis information") \
2317 \
2318 notproduct(bool, TraceLivenessQuery, false, \
2319 "Trace queries of liveness analysis information") \
2320 \
2321 notproduct(bool, CollectIndexSetStatistics, false, \
2322 "Collect information about IndexSets") \
2323 \
2324 develop(bool, PrintDominators, false, \
2325 "Print out dominator trees for GVN") \
2326 \
2327 develop(bool, UseLoopSafepoints, true, \
2328 "Generate Safepoint nodes in every loop") \
2329 \
2330 notproduct(bool, TraceCISCSpill, false, \
2331 "Trace allocators use of cisc spillable instructions") \
2332 \
2333 notproduct(bool, TraceSpilling, false, \
2334 "Trace spilling") \
2335 \
2336 develop(bool, DeutschShiffmanExceptions, true, \
2337 "Fast check to find exception handler for precisely typed " \
2338 "exceptions") \
2339 \
2340 product(bool, SplitIfBlocks, true, \
2341 "Clone compares and control flow through merge points to fold " \
2342 "some branches") \
2343 \
2344 develop(intx, FastAllocateSizeLimit, 128*K, \
2345 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2346 "Inline allocations larger than this in doublewords must go slow")\
2347 \
2348 product(bool, AggressiveOpts, false, \
2349 "Enable aggressive optimizations - see arguments.cpp") \
2350 \
2351 product(bool, UseStringCache, false, \
2352 "Enable String cache capabilities on String.java") \
2353 \
2354 /* statistics */ \
2355 develop(bool, UseVTune, false, \
2356 "enable support for Intel's VTune profiler") \
2357 \
2358 develop(bool, CountCompiledCalls, false, \
2359 "counts method invocations") \
2360 \
2361 notproduct(bool, CountRuntimeCalls, false, \
2362 "counts VM runtime calls") \
2363 \
2364 develop(bool, CountJNICalls, false, \
2365 "counts jni method invocations") \
2366 \
2367 notproduct(bool, CountJVMCalls, false, \
2368 "counts jvm method invocations") \
2369 \
2370 notproduct(bool, CountRemovableExceptions, false, \
2371 "count exceptions that could be replaced by branches due to " \
2372 "inlining") \
2373 \
2374 notproduct(bool, ICMissHistogram, false, \
2375 "produce histogram of IC misses") \
2376 \
2377 notproduct(bool, PrintClassStatistics, false, \
2378 "prints class statistics at end of run") \
2379 \
2380 notproduct(bool, PrintMethodStatistics, false, \
2381 "prints method statistics at end of run") \
2382 \
2383 /* interpreter */ \
2384 develop(bool, ClearInterpreterLocals, false, \
2385 "Always clear local variables of interpreter activations upon " \
2386 "entry") \
2387 \
2388 product_pd(bool, RewriteBytecodes, \
2389 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2390 \
2391 product_pd(bool, RewriteFrequentPairs, \
2392 "Rewrite frequently used bytecode pairs into a single bytecode") \
2393 \
2394 diagnostic(bool, PrintInterpreter, false, \
2395 "Prints the generated interpreter code") \
2396 \
2397 product(bool, UseInterpreter, true, \
2398 "Use interpreter for non-compiled methods") \
2399 \
2400 develop(bool, UseFastSignatureHandlers, true, \
2401 "Use fast signature handlers for native calls") \
2402 \
2403 develop(bool, UseV8InstrsOnly, false, \
2404 "Use SPARC-V8 Compliant instruction subset") \
2405 \
2406 product(bool, UseNiagaraInstrs, false, \
2407 "Use Niagara-efficient instruction subset") \
2408 \
2409 develop(bool, UseCASForSwap, false, \
2410 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
2411 \
2412 product(bool, UseLoopCounter, true, \
2413 "Increment invocation counter on backward branch") \
2414 \
2415 product(bool, UseFastEmptyMethods, true, \
2416 "Use fast method entry code for empty methods") \
2417 \
2418 product(bool, UseFastAccessorMethods, true, \
2419 "Use fast method entry code for accessor methods") \
2420 \
2421 product_pd(bool, UseOnStackReplacement, \
2422 "Use on stack replacement, calls runtime if invoc. counter " \
2423 "overflows in loop") \
2424 \
2425 notproduct(bool, TraceOnStackReplacement, false, \
2426 "Trace on stack replacement") \
2427 \
2428 develop(bool, PoisonOSREntry, true, \
2429 "Detect abnormal calls to OSR code") \
2430 \
2431 product_pd(bool, PreferInterpreterNativeStubs, \
2432 "Use always interpreter stubs for native methods invoked via " \
2433 "interpreter") \
2434 \
2435 develop(bool, CountBytecodes, false, \
2436 "Count number of bytecodes executed") \
2437 \
2438 develop(bool, PrintBytecodeHistogram, false, \
2439 "Print histogram of the executed bytecodes") \
2440 \
2441 develop(bool, PrintBytecodePairHistogram, false, \
2442 "Print histogram of the executed bytecode pairs") \
2443 \
2444 diagnostic(bool, PrintSignatureHandlers, false, \
2445 "Print code generated for native method signature handlers") \
2446 \
2447 develop(bool, VerifyOops, false, \
2448 "Do plausibility checks for oops") \
2449 \
2450 develop(bool, CheckUnhandledOops, false, \
2451 "Check for unhandled oops in VM code") \
2452 \
2453 develop(bool, VerifyJNIFields, trueInDebug, \
2454 "Verify jfieldIDs for instance fields") \
2455 \
2456 notproduct(bool, VerifyJNIEnvThread, false, \
2457 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2458 "from JNI") \
2459 \
2460 develop(bool, VerifyFPU, false, \
2461 "Verify FPU state (check for NaN's, etc.)") \
2462 \
2463 develop(bool, VerifyThread, false, \
2464 "Watch the thread register for corruption (SPARC only)") \
2465 \
2466 develop(bool, VerifyActivationFrameSize, false, \
2467 "Verify that activation frame didn't become smaller than its " \
2468 "minimal size") \
2469 \
2470 develop(bool, TraceFrequencyInlining, false, \
2471 "Trace frequency based inlining") \
2472 \
2473 notproduct(bool, TraceTypeProfile, false, \
2474 "Trace type profile") \
2475 \
2476 develop_pd(bool, InlineIntrinsics, \
2477 "Inline intrinsics that can be statically resolved") \
2478 \
2479 product_pd(bool, ProfileInterpreter, \
2480 "Profile at the bytecode level during interpretation") \
2481 \
2482 develop_pd(bool, ProfileTraps, \
2483 "Profile deoptimization traps at the bytecode level") \
2484 \
2485 product(intx, ProfileMaturityPercentage, 20, \
2486 "number of method invocations/branches (expressed as % of " \
2487 "CompileThreshold) before using the method's profile") \
2488 \
2489 develop(bool, PrintMethodData, false, \
2490 "Print the results of +ProfileInterpreter at end of run") \
2491 \
2492 develop(bool, VerifyDataPointer, trueInDebug, \
2493 "Verify the method data pointer during interpreter profiling") \
2494 \
2495 develop(bool, VerifyCompiledCode, false, \
2496 "Include miscellaneous runtime verifications in nmethod code; " \
2497 "off by default because it disturbs nmethod size heuristics.") \
2498 \
2499 \
2500 /* compilation */ \
2501 product(bool, UseCompiler, true, \
2502 "use compilation") \
2503 \
2504 develop(bool, TraceCompilationPolicy, false, \
2505 "Trace compilation policy") \
2506 \
2507 develop(bool, TimeCompilationPolicy, false, \
2508 "Time the compilation policy") \
2509 \
2510 product(bool, UseCounterDecay, true, \
2511 "adjust recompilation counters") \
2512 \
2513 develop(intx, CounterHalfLifeTime, 30, \
2514 "half-life time of invocation counters (in secs)") \
2515 \
2516 develop(intx, CounterDecayMinIntervalLength, 500, \
2517 "Min. ms. between invocation of CounterDecay") \
2518 \
2519 product(bool, AlwaysCompileLoopMethods, false, \
2520 "when using recompilation, never interpret methods " \
2521 "containing loops") \
2522 \
2523 product(bool, DontCompileHugeMethods, true, \
2524 "don't compile methods > HugeMethodLimit") \
2525 \
2526 /* Bytecode escape analysis estimation. */ \
2527 product(bool, EstimateArgEscape, true, \
2528 "Analyze bytecodes to estimate escape state of arguments") \
2529 \
2530 product(intx, BCEATraceLevel, 0, \
2531 "How much tracing to do of bytecode escape analysis estimates") \
2532 \
2533 product(intx, MaxBCEAEstimateLevel, 5, \
2534 "Maximum number of nested calls that are analyzed by BC EA.") \
2535 \
2536 product(intx, MaxBCEAEstimateSize, 150, \
2537 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2538 \
2539 product(intx, AllocatePrefetchStyle, 1, \
2540 "0 = no prefetch, " \
2541 "1 = prefetch instructions for each allocation, " \
2542 "2 = use TLAB watermark to gate allocation prefetch") \
2543 \
2544 product(intx, AllocatePrefetchDistance, -1, \
2545 "Distance to prefetch ahead of allocation pointer") \
2546 \
2547 product(intx, AllocatePrefetchLines, 1, \
2548 "Number of lines to prefetch ahead of allocation pointer") \
2549 \
2550 product(intx, AllocatePrefetchStepSize, 16, \
2551 "Step size in bytes of sequential prefetch instructions") \
2552 \
2553 product(intx, AllocatePrefetchInstr, 0, \
2554 "Prefetch instruction to prefetch ahead of allocation pointer") \
2555 \
2556 product(intx, ReadPrefetchInstr, 0, \
2557 "Prefetch instruction to prefetch ahead") \
2558 \
2559 /* deoptimization */ \
2560 develop(bool, TraceDeoptimization, false, \
2561 "Trace deoptimization") \
2562 \
2563 develop(bool, DebugDeoptimization, false, \
2564 "Tracing various information while debugging deoptimization") \
2565 \
2566 product(intx, SelfDestructTimer, 0, \
2567 "Will cause VM to terminate after a given time (in minutes) " \
2568 "(0 means off)") \
2569 \
2570 product(intx, MaxJavaStackTraceDepth, 1024, \
2571 "Max. no. of lines in the stack trace for Java exceptions " \
2572 "(0 means all)") \
2573 \
2574 develop(intx, GuaranteedSafepointInterval, 1000, \
2575 "Guarantee a safepoint (at least) every so many milliseconds " \
2576 "(0 means none)") \
2577 \
2578 product(intx, SafepointTimeoutDelay, 10000, \
2579 "Delay in milliseconds for option SafepointTimeout") \
2580 \
2581 product(intx, NmethodSweepFraction, 4, \
2582 "Number of invocations of sweeper to cover all nmethods") \
2583 \
2584 notproduct(intx, MemProfilingInterval, 500, \
2585 "Time between each invocation of the MemProfiler") \
2586 \
2587 develop(intx, MallocCatchPtr, -1, \
2588 "Hit breakpoint when mallocing/freeing this pointer") \
2589 \
2590 notproduct(intx, AssertRepeat, 1, \
2591 "number of times to evaluate expression in assert " \
2592 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2593 \
2594 notproduct(ccstrlist, SuppressErrorAt, "", \
2595 "List of assertions (file:line) to muzzle") \
2596 \
2597 notproduct(uintx, HandleAllocationLimit, 1024, \
2598 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2599 "is used") \
2600 \
2601 develop(uintx, TotalHandleAllocationLimit, 1024, \
2602 "Threshold for total handle allocation when " \
2603 "+TraceHandleAllocation is used") \
2604 \
2605 develop(intx, StackPrintLimit, 100, \
2606 "number of stack frames to print in VM-level stack dump") \
2607 \
2608 notproduct(intx, MaxElementPrintSize, 256, \
2609 "maximum number of elements to print") \
2610 \
2611 notproduct(intx, MaxSubklassPrintSize, 4, \
2612 "maximum number of subklasses to print when printing klass") \
2613 \
2614 develop(intx, MaxInlineLevel, 9, \
2615 "maximum number of nested calls that are inlined") \
2616 \
2617 develop(intx, MaxRecursiveInlineLevel, 1, \
2618 "maximum number of nested recursive calls that are inlined") \
2619 \
2620 product_pd(intx, InlineSmallCode, \
2621 "Only inline already compiled methods if their code size is " \
2622 "less than this") \
2623 \
2624 product(intx, MaxInlineSize, 35, \
2625 "maximum bytecode size of a method to be inlined") \
2626 \
2627 product_pd(intx, FreqInlineSize, \
2628 "maximum bytecode size of a frequent method to be inlined") \
2629 \
2630 develop(intx, MaxTrivialSize, 6, \
2631 "maximum bytecode size of a trivial method to be inlined") \
2632 \
2633 develop(intx, MinInliningThreshold, 250, \
2634 "min. invocation count a method needs to have to be inlined") \
2635 \
2636 develop(intx, AlignEntryCode, 4, \
2637 "aligns entry code to specified value (in bytes)") \
2638 \
2639 develop(intx, MethodHistogramCutoff, 100, \
2640 "cutoff value for method invoc. histogram (+CountCalls)") \
2641 \
2642 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
2643 "# of interpreted methods to show in profile") \
2644 \
2645 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
2646 "# of compiled methods to show in profile") \
2647 \
2648 develop(intx, ProfilerNumberOfStubMethods, 25, \
2649 "# of stub methods to show in profile") \
2650 \
2651 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
2652 "# of runtime stub nodes to show in profile") \
2653 \
2654 product(intx, ProfileIntervalsTicks, 100, \
2655 "# of ticks between printing of interval profile " \
2656 "(+ProfileIntervals)") \
2657 \
2658 notproduct(intx, ScavengeALotInterval, 1, \
2659 "Interval between which scavenge will occur with +ScavengeALot") \
2660 \
2661 notproduct(intx, FullGCALotInterval, 1, \
2662 "Interval between which full gc will occur with +FullGCALot") \
2663 \
2664 notproduct(intx, FullGCALotStart, 0, \
2665 "For which invocation to start FullGCAlot") \
2666 \
2667 notproduct(intx, FullGCALotDummies, 32*K, \
2668 "Dummy object allocated with +FullGCALot, forcing all objects " \
2669 "to move") \
2670 \
2671 develop(intx, DontYieldALotInterval, 10, \
2672 "Interval between which yields will be dropped (milliseconds)") \
2673 \
2674 develop(intx, MinSleepInterval, 1, \
2675 "Minimum sleep() interval (milliseconds) when " \
2676 "ConvertSleepToYield is off (used for SOLARIS)") \
2677 \
2678 product(intx, EventLogLength, 2000, \
2679 "maximum nof events in event log") \
2680 \
2681 develop(intx, ProfilerPCTickThreshold, 15, \
2682 "Number of ticks in a PC buckets to be a hotspot") \
2683 \
2684 notproduct(intx, DeoptimizeALotInterval, 5, \
2685 "Number of exits until DeoptimizeALot kicks in") \
2686 \
2687 notproduct(intx, ZombieALotInterval, 5, \
2688 "Number of exits until ZombieALot kicks in") \
2689 \
2690 develop(bool, StressNonEntrant, false, \
2691 "Mark nmethods non-entrant at registration") \
2692 \
2693 diagnostic(intx, MallocVerifyInterval, 0, \
2694 "if non-zero, verify C heap after every N calls to " \
2695 "malloc/realloc/free") \
2696 \
2697 diagnostic(intx, MallocVerifyStart, 0, \
2698 "if non-zero, start verifying C heap after Nth call to " \
2699 "malloc/realloc/free") \
2700 \
2701 product(intx, TypeProfileWidth, 2, \
2702 "number of receiver types to record in call/cast profile") \
2703 \
2704 develop(intx, BciProfileWidth, 2, \
2705 "number of return bci's to record in ret profile") \
2706 \
2707 product(intx, PerMethodRecompilationCutoff, 400, \
2708 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
2709 \
2710 product(intx, PerBytecodeRecompilationCutoff, 100, \
2711 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
2712 \
2713 product(intx, PerMethodTrapLimit, 100, \
2714 "Limit on traps (of one kind) in a method (includes inlines)") \
2715 \
2716 product(intx, PerBytecodeTrapLimit, 4, \
2717 "Limit on traps (of one kind) at a particular BCI") \
2718 \
2719 develop(intx, FreqCountInvocations, 1, \
2720 "Scaling factor for branch frequencies (deprecated)") \
2721 \
2722 develop(intx, InlineFrequencyRatio, 20, \
2723 "Ratio of call site execution to caller method invocation") \
2724 \
2725 develop_pd(intx, InlineFrequencyCount, \
2726 "Count of call site execution necessary to trigger frequent " \
2727 "inlining") \
2728 \
2729 develop(intx, InlineThrowCount, 50, \
2730 "Force inlining of interpreted methods that throw this often") \
2731 \
2732 develop(intx, InlineThrowMaxSize, 200, \
2733 "Force inlining of throwing methods smaller than this") \
2734 \
2735 product(intx, AliasLevel, 3, \
2736 "0 for no aliasing, 1 for oop/field/static/array split, " \
2737 "2 for class split, 3 for unique instances") \
2738 \
2739 develop(bool, VerifyAliases, false, \
2740 "perform extra checks on the results of alias analysis") \
2741 \
2742 develop(intx, ProfilerNodeSize, 1024, \
2743 "Size in K to allocate for the Profile Nodes of each thread") \
2744 \
2745 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \
2746 "Number of times to spin wait on a v8 atomic operation lock") \
2747 \
2748 product(intx, ReadSpinIterations, 100, \
2749 "Number of read attempts before a yield (spin inner loop)") \
2750 \
2751 product_pd(intx, PreInflateSpin, \
2752 "Number of times to spin wait before inflation") \
2753 \
2754 product(intx, PreBlockSpin, 10, \
2755 "Number of times to spin in an inflated lock before going to " \
2756 "an OS lock") \
2757 \
2758 /* gc parameters */ \
2759 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \
2760 "Default maximum size for object heap (in bytes)") \
2761 \
2762 product_pd(uintx, NewSize, \
2763 "Default size of new generation (in bytes)") \
2764 \
2765 product(uintx, MaxNewSize, max_uintx, \
2766 "Maximum size of new generation (in bytes)") \
2767 \
2768 product(uintx, PretenureSizeThreshold, 0, \
2769 "Max size in bytes of objects allocated in DefNew generation") \
2770 \
2771 product_pd(uintx, TLABSize, \
2772 "Default (or starting) size of TLAB (in bytes)") \
2773 \
2774 product(uintx, MinTLABSize, 2*K, \
2775 "Minimum allowed TLAB size (in bytes)") \
2776 \
2777 product(uintx, TLABAllocationWeight, 35, \
2778 "Allocation averaging weight") \
2779 \
2780 product(uintx, TLABWasteTargetPercent, 1, \
2781 "Percentage of Eden that can be wasted") \
2782 \
2783 product(uintx, TLABRefillWasteFraction, 64, \
2784 "Max TLAB waste at a refill (internal fragmentation)") \
2785 \
2786 product(uintx, TLABWasteIncrement, 4, \
2787 "Increment allowed waste at slow allocation") \
2788 \
2789 product_pd(intx, SurvivorRatio, \
2790 "Ratio of eden/survivor space size") \
2791 \
2792 product_pd(intx, NewRatio, \
2793 "Ratio of new/old generation sizes") \
2794 \
2795 product(uintx, MaxLiveObjectEvacuationRatio, 100, \
2796 "Max percent of eden objects that will be live at scavenge") \
2797 \
2798 product_pd(uintx, NewSizeThreadIncrease, \
2799 "Additional size added to desired new generation size per " \
2800 "non-daemon thread (in bytes)") \
2801 \
2802 product(uintx, OldSize, ScaleForWordSize(4096*K), \
2803 "Default size of tenured generation (in bytes)") \
2804 \
2805 product_pd(uintx, PermSize, \
2806 "Default size of permanent generation (in bytes)") \
2807 \
2808 product_pd(uintx, MaxPermSize, \
2809 "Maximum size of permanent generation (in bytes)") \
2810 \
2811 product(uintx, MinHeapFreeRatio, 40, \
2812 "Min percentage of heap free after GC to avoid expansion") \
2813 \
2814 product(uintx, MaxHeapFreeRatio, 70, \
2815 "Max percentage of heap free after GC to avoid shrinking") \
2816 \
2817 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
2818 "Number of milliseconds per MB of free space in the heap") \
2819 \
2820 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
2821 "Min change in heap space due to GC (in bytes)") \
2822 \
2823 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \
2824 "Min expansion of permanent heap (in bytes)") \
2825 \
2826 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \
2827 "Max expansion of permanent heap without full GC (in bytes)") \
2828 \
2829 product(intx, QueuedAllocationWarningCount, 0, \
2830 "Number of times an allocation that queues behind a GC " \
2831 "will retry before printing a warning") \
2832 \
2833 diagnostic(uintx, VerifyGCStartAt, 0, \
2834 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
2835 \
2836 diagnostic(intx, VerifyGCLevel, 0, \
2837 "Generation level at which to start +VerifyBefore/AfterGC") \
2838 \
2839 develop(uintx, ExitAfterGCNum, 0, \
2840 "If non-zero, exit after this GC.") \
2841 \
2842 product(intx, MaxTenuringThreshold, 15, \
2843 "Maximum value for tenuring threshold") \
2844 \
2845 product(intx, InitialTenuringThreshold, 7, \
2846 "Initial value for tenuring threshold") \
2847 \
2848 product(intx, TargetSurvivorRatio, 50, \
2849 "Desired percentage of survivor space used after scavenge") \
2850 \
2851 product(uintx, MarkSweepDeadRatio, 5, \
2852 "Percentage (0-100) of the old gen allowed as dead wood." \
2853 "Serial mark sweep treats this as both the min and max value." \
2854 "CMS uses this value only if it falls back to mark sweep." \
2855 "Par compact uses a variable scale based on the density of the" \
2856 "generation and treats this as the max value when the heap is" \
2857 "either completely full or completely empty. Par compact also" \
2858 "has a smaller default value; see arguments.cpp.") \
2859 \
2860 product(uintx, PermMarkSweepDeadRatio, 20, \
2861 "Percentage (0-100) of the perm gen allowed as dead wood." \
2862 "See MarkSweepDeadRatio for collector-specific comments.") \
2863 \
2864 product(intx, MarkSweepAlwaysCompactCount, 4, \
2865 "How often should we fully compact the heap (ignoring the dead " \
2866 "space parameters)") \
2867 \
2868 product(intx, PrintCMSStatistics, 0, \
2869 "Statistics for CMS") \
2870 \
2871 product(bool, PrintCMSInitiationStatistics, false, \
2872 "Statistics for initiating a CMS collection") \
2873 \
2874 product(intx, PrintFLSStatistics, 0, \
2875 "Statistics for CMS' FreeListSpace") \
2876 \
2877 product(intx, PrintFLSCensus, 0, \
2878 "Census for CMS' FreeListSpace") \
2879 \
2880 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
2881 "Delay in ms between expansion and allocation") \
2882 \
2883 product(intx, DeferThrSuspendLoopCount, 4000, \
2884 "(Unstable) Number of times to iterate in safepoint loop " \
2885 " before blocking VM threads ") \
2886 \
2887 product(intx, DeferPollingPageLoopCount, -1, \
2888 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
2889 "before changing safepoint polling page to RO ") \
2890 \
2891 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
2892 \
2893 product(bool, UseDepthFirstScavengeOrder, true, \
2894 "true: the scavenge order will be depth-first, " \
2895 "false: the scavenge order will be breadth-first") \
2896 \
2897 product(bool, PSChunkLargeArrays, true, \
2898 "true: process large arrays in chunks") \
2899 \
2900 product(uintx, GCDrainStackTargetSize, 64, \
2901 "how many entries we'll try to leave on the stack during " \
2902 "parallel GC") \
2903 \
2904 product(intx, DCQBarrierQueueBufferSize, 256, \
2905 "Number of elements in a dirty card queue buffer") \
2906 \
2907 product(intx, DCQBarrierProcessCompletedThreshold, 5, \
2908 "Number of completed dirty card buffers to trigger processing.") \
2909 \
2910 /* stack parameters */ \
2911 product_pd(intx, StackYellowPages, \
2912 "Number of yellow zone (recoverable overflows) pages") \
2913 \
2914 product_pd(intx, StackRedPages, \
2915 "Number of red zone (unrecoverable overflows) pages") \
2916 \
2917 product_pd(intx, StackShadowPages, \
2918 "Number of shadow zone (for overflow checking) pages" \
2919 " this should exceed the depth of the VM and native call stack") \
2920 \
2921 product_pd(intx, ThreadStackSize, \
2922 "Thread Stack Size (in Kbytes)") \
2923 \
2924 product_pd(intx, VMThreadStackSize, \
2925 "Non-Java Thread Stack Size (in Kbytes)") \
2926 \
2927 product_pd(intx, CompilerThreadStackSize, \
2928 "Compiler Thread Stack Size (in Kbytes)") \
2929 \
2930 develop_pd(uintx, JVMInvokeMethodSlack, \
2931 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
2932 \
2933 product(uintx, ThreadSafetyMargin, 50*M, \
2934 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
2935 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
2936 "disable this feature") \
2937 \
2938 /* code cache parameters */ \
2939 develop(uintx, CodeCacheSegmentSize, 64, \
2940 "Code cache segment size (in bytes) - smallest unit of " \
2941 "allocation") \
2942 \
2943 develop_pd(intx, CodeEntryAlignment, \
2944 "Code entry alignment for generated code (in bytes)") \
2945 \
2946 product_pd(uintx, InitialCodeCacheSize, \
2947 "Initial code cache size (in bytes)") \
2948 \
2949 product_pd(uintx, ReservedCodeCacheSize, \
2950 "Reserved code cache size (in bytes) - maximum code cache size") \
2951 \
2952 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
2953 "When less than X space left, we stop compiling.") \
2954 \
2955 product_pd(uintx, CodeCacheExpansionSize, \
2956 "Code cache expansion size (in bytes)") \
2957 \
2958 develop_pd(uintx, CodeCacheMinBlockLength, \
2959 "Minimum number of segments in a code cache block.") \
2960 \
2961 notproduct(bool, ExitOnFullCodeCache, false, \
2962 "Exit the VM if we fill the code cache.") \
2963 \
2964 /* interpreter debugging */ \
2965 develop(intx, BinarySwitchThreshold, 5, \
2966 "Minimal number of lookupswitch entries for rewriting to binary " \
2967 "switch") \
2968 \
2969 develop(intx, StopInterpreterAt, 0, \
2970 "Stops interpreter execution at specified bytecode number") \
2971 \
2972 develop(intx, TraceBytecodesAt, 0, \
2973 "Traces bytecodes starting with specified bytecode number") \
2974 \
2975 /* compiler interface */ \
2976 develop(intx, CIStart, 0, \
2977 "the id of the first compilation to permit") \
2978 \
2979 develop(intx, CIStop, -1, \
2980 "the id of the last compilation to permit") \
2981 \
2982 develop(intx, CIStartOSR, 0, \
2983 "the id of the first osr compilation to permit " \
2984 "(CICountOSR must be on)") \
2985 \
2986 develop(intx, CIStopOSR, -1, \
2987 "the id of the last osr compilation to permit " \
2988 "(CICountOSR must be on)") \
2989 \
2990 develop(intx, CIBreakAtOSR, -1, \
2991 "id of osr compilation to break at") \
2992 \
2993 develop(intx, CIBreakAt, -1, \
2994 "id of compilation to break at") \
2995 \
2996 product(ccstrlist, CompileOnly, "", \
2997 "List of methods (pkg/class.name) to restrict compilation to") \
2998 \
2999 product(ccstr, CompileCommandFile, NULL, \
3000 "Read compiler commands from this file [.hotspot_compiler]") \
3001 \
3002 product(ccstrlist, CompileCommand, "", \
3003 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
3004 \
3005 product(bool, CICompilerCountPerCPU, false, \
3006 "1 compiler thread for log(N CPUs)") \
3007 \
3008 develop(intx, CIFireOOMAt, -1, \
3009 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
3010 "(non-negative value throws OOM after this many CI accesses " \
3011 "in each compile)") \
3012 \
3013 develop(intx, CIFireOOMAtDelay, -1, \
3014 "Wait for this many CI accesses to occur in all compiles before " \
3015 "beginning to throw OutOfMemoryErrors in each compile") \
3016 \
3017 /* Priorities */ \
3018 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
3019 \
3020 product(intx, ThreadPriorityPolicy, 0, \
3021 "0 : Normal. "\
3022 " VM chooses priorities that are appropriate for normal "\
3023 " applications. On Solaris NORM_PRIORITY and above are mapped "\
3024 " to normal native priority. Java priorities below NORM_PRIORITY"\
3025 " map to lower native priority values. On Windows applications"\
3026 " are allowed to use higher native priorities. However, with "\
3027 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
3028 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
3029 " interfere with system threads. On Linux thread priorities "\
3030 " are ignored because the OS does not support static priority "\
3031 " in SCHED_OTHER scheduling class which is the only choice for"\
3032 " non-root, non-realtime applications. "\
3033 "1 : Aggressive. "\
3034 " Java thread priorities map over to the entire range of "\
3035 " native thread priorities. Higher Java thread priorities map "\
3036 " to higher native thread priorities. This policy should be "\
3037 " used with care, as sometimes it can cause performance "\
3038 " degradation in the application and/or the entire system. On "\
3039 " Linux this policy requires root privilege.") \
3040 \
3041 product(bool, ThreadPriorityVerbose, false, \
3042 "print priority changes") \
3043 \
3044 product(intx, DefaultThreadPriority, -1, \
3045 "what native priority threads run at if not specified elsewhere (-1 means no change)") \
3046 \
3047 product(intx, CompilerThreadPriority, -1, \
3048 "what priority should compiler threads run at (-1 means no change)") \
3049 \
3050 product(intx, VMThreadPriority, -1, \
3051 "what priority should VM threads run at (-1 means no change)") \
3052 \
3053 product(bool, CompilerThreadHintNoPreempt, true, \
3054 "(Solaris only) Give compiler threads an extra quanta") \
3055 \
3056 product(bool, VMThreadHintNoPreempt, false, \
3057 "(Solaris only) Give VM thread an extra quanta") \
3058 \
3059 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3060 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3061 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3062 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3063 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3064 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3065 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3066 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3067 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3068 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3069 \
3070 /* compiler debugging */ \
3071 notproduct(intx, CompileTheWorldStartAt, 1, \
3072 "First class to consider when using +CompileTheWorld") \
3073 \
3074 notproduct(intx, CompileTheWorldStopAt, max_jint, \
3075 "Last class to consider when using +CompileTheWorld") \
3076 \
3077 develop(intx, NewCodeParameter, 0, \
3078 "Testing Only: Create a dedicated integer parameter before " \
3079 "putback") \
3080 \
3081 /* new oopmap storage allocation */ \
3082 develop(intx, MinOopMapAllocation, 8, \
3083 "Minimum number of OopMap entries in an OopMapSet") \
3084 \
3085 /* Background Compilation */ \
3086 develop(intx, LongCompileThreshold, 50, \
3087 "Used with +TraceLongCompiles") \
3088 \
3089 product(intx, StarvationMonitorInterval, 200, \
3090 "Pause between each check in ms") \
3091 \
3092 /* recompilation */ \
3093 product_pd(intx, CompileThreshold, \
3094 "number of interpreted method invocations before (re-)compiling") \
3095 \
3096 product_pd(intx, BackEdgeThreshold, \
3097 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3098 \
3099 product(intx, Tier1BytecodeLimit, 10, \
3100 "Must have at least this many bytecodes before tier1" \
3101 "invocation counters are used") \
3102 \
3103 product_pd(intx, Tier2CompileThreshold, \
3104 "threshold at which a tier 2 compilation is invoked") \
3105 \
3106 product_pd(intx, Tier2BackEdgeThreshold, \
3107 "Back edge threshold at which a tier 2 compilation is invoked") \
3108 \
3109 product_pd(intx, Tier3CompileThreshold, \
3110 "threshold at which a tier 3 compilation is invoked") \
3111 \
3112 product_pd(intx, Tier3BackEdgeThreshold, \
3113 "Back edge threshold at which a tier 3 compilation is invoked") \
3114 \
3115 product_pd(intx, Tier4CompileThreshold, \
3116 "threshold at which a tier 4 compilation is invoked") \
3117 \
3118 product_pd(intx, Tier4BackEdgeThreshold, \
3119 "Back edge threshold at which a tier 4 compilation is invoked") \
3120 \
3121 product_pd(bool, TieredCompilation, \
3122 "Enable two-tier compilation") \
3123 \
3124 product(bool, StressTieredRuntime, false, \
3125 "Alternate client and server compiler on compile requests") \
3126 \
3127 product_pd(intx, OnStackReplacePercentage, \
3128 "NON_TIERED number of method invocations/branches (expressed as %"\
3129 "of CompileThreshold) before (re-)compiling OSR code") \
3130 \
3131 product(intx, InterpreterProfilePercentage, 33, \
3132 "NON_TIERED number of method invocations/branches (expressed as %"\
3133 "of CompileThreshold) before profiling in the interpreter") \
3134 \
3135 develop(intx, MaxRecompilationSearchLength, 10, \
3136 "max. # frames to inspect searching for recompilee") \
3137 \
3138 develop(intx, MaxInterpretedSearchLength, 3, \
3139 "max. # interp. frames to skip when searching for recompilee") \
3140 \
3141 develop(intx, DesiredMethodLimit, 8000, \
3142 "desired max. method size (in bytecodes) after inlining") \
3143 \
3144 develop(intx, HugeMethodLimit, 8000, \
3145 "don't compile methods larger than this if " \
3146 "+DontCompileHugeMethods") \
3147 \
3148 /* New JDK 1.4 reflection implementation */ \
3149 \
3150 develop(bool, UseNewReflection, true, \
3151 "Temporary flag for transition to reflection based on dynamic " \
3152 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3153 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3154 "changes were needed") \
3155 \
3156 develop(bool, VerifyReflectionBytecodes, false, \
3157 "Force verification of 1.4 reflection bytecodes. Does not work " \
3158 "in situations like that described in 4486457 or for " \
3159 "constructors generated for serialization, so can not be enabled "\
3160 "in product.") \
3161 \
3162 product(bool, ReflectionWrapResolutionErrors, true, \
3163 "Temporary flag for transition to AbstractMethodError wrapped " \
3164 "in InvocationTargetException. See 6531596") \
3165 \
3166 \
3167 develop(intx, FastSuperclassLimit, 8, \
3168 "Depth of hardwired instanceof accelerator array") \
3169 \
3170 /* Properties for Java libraries */ \
3171 \
3172 product(intx, MaxDirectMemorySize, -1, \
3173 "Maximum total size of NIO direct-buffer allocations") \
3174 \
3175 /* temporary developer defined flags */ \
3176 \
3177 diagnostic(bool, UseNewCode, false, \
3178 "Testing Only: Use the new version while testing") \
3179 \
3180 diagnostic(bool, UseNewCode2, false, \
3181 "Testing Only: Use the new version while testing") \
3182 \
3183 diagnostic(bool, UseNewCode3, false, \
3184 "Testing Only: Use the new version while testing") \
3185 \
3186 /* flags for performance data collection */ \
3187 \
3188 product(bool, UsePerfData, true, \
3189 "Flag to disable jvmstat instrumentation for performance testing" \
3190 "and problem isolation purposes.") \
3191 \
3192 product(bool, PerfDataSaveToFile, false, \
3193 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3194 \
3195 product(ccstr, PerfDataSaveFile, NULL, \
3196 "Save PerfData memory to the specified absolute pathname," \
3197 "%p in the file name if present will be replaced by pid") \
3198 \
3199 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3200 "Data sampling interval in milliseconds") \
3201 \
3202 develop(bool, PerfTraceDataCreation, false, \
3203 "Trace creation of Performance Data Entries") \
3204 \
3205 develop(bool, PerfTraceMemOps, false, \
3206 "Trace PerfMemory create/attach/detach calls") \
3207 \
3208 product(bool, PerfDisableSharedMem, false, \
3209 "Store performance data in standard memory") \
3210 \
3211 product(intx, PerfDataMemorySize, 32*K, \
3212 "Size of performance data memory region. Will be rounded " \
3213 "up to a multiple of the native os page size.") \
3214 \
3215 product(intx, PerfMaxStringConstLength, 1024, \
3216 "Maximum PerfStringConstant string length before truncation") \
3217 \
3218 product(bool, PerfAllowAtExitRegistration, false, \
3219 "Allow registration of atexit() methods") \
3220 \
3221 product(bool, PerfBypassFileSystemCheck, false, \
3222 "Bypass Win32 file system criteria checks (Windows Only)") \
3223 \
3224 product(intx, UnguardOnExecutionViolation, 0, \
3225 "Unguard page and retry on no-execute fault (Win32 only)" \
3226 "0=off, 1=conservative, 2=aggressive") \
3227 \
3228 /* Serviceability Support */ \
3229 \
3230 product(bool, ManagementServer, false, \
3231 "Create JMX Management Server") \
3232 \
3233 product(bool, DisableAttachMechanism, false, \
3234 "Disable mechanism that allows tools to attach to this VM") \
3235 \
3236 product(bool, StartAttachListener, false, \
3237 "Always start Attach Listener at VM startup") \
3238 \
3239 manageable(bool, PrintConcurrentLocks, false, \
3240 "Print java.util.concurrent locks in thread dump") \
3241 \
3242 /* Shared spaces */ \
3243 \
3244 product(bool, UseSharedSpaces, true, \
3245 "Use shared spaces in the permanent generation") \
3246 \
3247 product(bool, RequireSharedSpaces, false, \
3248 "Require shared spaces in the permanent generation") \
3249 \
3250 product(bool, ForceSharedSpaces, false, \
3251 "Require shared spaces in the permanent generation") \
3252 \
3253 product(bool, DumpSharedSpaces, false, \
3254 "Special mode: JVM reads a class list, loads classes, builds " \
3255 "shared spaces, and dumps the shared spaces to a file to be " \
3256 "used in future JVM runs.") \
3257 \
3258 product(bool, PrintSharedSpaces, false, \
3259 "Print usage of shared spaces") \
3260 \
3261 product(uintx, SharedDummyBlockSize, 512*M, \
3262 "Size of dummy block used to shift heap addresses (in bytes)") \
3263 \
3264 product(uintx, SharedReadWriteSize, 12*M, \
3265 "Size of read-write space in permanent generation (in bytes)") \
3266 \
3267 product(uintx, SharedReadOnlySize, 8*M, \
3268 "Size of read-only space in permanent generation (in bytes)") \
3269 \
3270 product(uintx, SharedMiscDataSize, 4*M, \
3271 "Size of the shared data area adjacent to the heap (in bytes)") \
3272 \
3273 product(uintx, SharedMiscCodeSize, 4*M, \
3274 "Size of the shared code area adjacent to the heap (in bytes)") \
3275 \
3276 diagnostic(bool, SharedOptimizeColdStart, true, \
3277 "At dump time, order shared objects to achieve better " \
3278 "cold startup time.") \
3279 \
3280 develop(intx, SharedOptimizeColdStartPolicy, 2, \
3281 "Reordering policy for SharedOptimizeColdStart " \
3282 "0=favor classload-time locality, 1=balanced, " \
3283 "2=favor runtime locality") \
3284 \
3285 diagnostic(bool, SharedSkipVerify, false, \
3286 "Skip assert() and verify() which page-in unwanted shared " \
3287 "objects. ") \
3288 \
3289 product(bool, AnonymousClasses, false, \
3290 "support sun.misc.Unsafe.defineAnonymousClass") \
3291 \
3292 product(bool, TaggedStackInterpreter, false, \
3293 "Insert tags in interpreter execution stack for oopmap generaion")\
3294 \
3295 diagnostic(bool, PauseAtStartup, false, \
3296 "Causes the VM to pause at startup time and wait for the pause " \
3297 "file to be removed (default: ./vm.paused.<pid>)") \
3298 \
3299 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3300 "The file to create and for whose removal to await when pausing " \
3301 "at startup. (default: ./vm.paused.<pid>)") \
3302 \
3303 product(bool, ExtendedDTraceProbes, false, \
3304 "Enable performance-impacting dtrace probes") \
3305 \
3306 product(bool, DTraceMethodProbes, false, \
3307 "Enable dtrace probes for method-entry and method-exit") \
3308 \
3309 product(bool, DTraceAllocProbes, false, \
3310 "Enable dtrace probes for object allocation") \
3311 \
3312 product(bool, DTraceMonitorProbes, false, \
3313 "Enable dtrace probes for monitor events") \
3314 \
3315 product(bool, RelaxAccessControlCheck, false, \
3316 "Relax the access control checks in the verifier") \
3317 \
3318 diagnostic(bool, PrintDTraceDOF, false, \
3319 "Print the DTrace DOF passed to the system for JSDT probes") \
3320 \
3321 product(bool, UseVMInterruptibleIO, false, \
3322 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3323 "EINTR for I/O operations results in OS_INTRPT. The default value"\
3324 " of this flag is true for JDK 6 and earliers")
3327 /*
3328 * Macros for factoring of globals
3329 */
3331 // Interface macros
3332 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3333 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3334 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3335 #define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3336 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3337 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3338 #ifdef PRODUCT
3339 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
3340 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
3341 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3342 #else
3343 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3344 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3345 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3346 #endif
3347 // Special LP64 flags, product only needed for now.
3348 #ifdef _LP64
3349 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3350 #else
3351 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3352 #endif // _LP64
3354 // Implementation macros
3355 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3356 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3357 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3358 #define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3359 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3360 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3361 #ifdef PRODUCT
3362 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3363 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
3364 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3365 #else
3366 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3367 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3368 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3369 #endif
3370 #ifdef _LP64
3371 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3372 #else
3373 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3374 #endif // _LP64
3376 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)
3378 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)