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src/share/vm/runtime/globals.hpp@018d5b58dd4f
src/share/vm/runtime/globals.hpp
Thu, 17 Apr 2008 22:18:15 -0400
- author
- kamg
- date
- Thu, 17 Apr 2008 22:18:15 -0400
- changeset 551
- 018d5b58dd4f
- parent 548
- ba764ed4b6f2
- child 567
- 60b728ec77c1
- permissions
- -rw-r--r--
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
Summary: Initial checkin of JSDT code
Reviewed-by: acorn, sbohne
1 /*
2 * Copyright 1997-2007 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, NewSizeThreadIncrease, 4*K);
51 define_pd_global(intx, NewRatio, 4);
52 define_pd_global(intx, InlineClassNatives, true);
53 define_pd_global(intx, InlineUnsafeOps, true);
54 define_pd_global(intx, InitialCodeCacheSize, 160*K);
55 define_pd_global(intx, ReservedCodeCacheSize, 32*M);
56 define_pd_global(intx, CodeCacheExpansionSize, 32*K);
57 define_pd_global(intx, CodeCacheMinBlockLength, 1);
58 define_pd_global(uintx,PermSize, ScaleForWordSize(4*M));
59 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
60 define_pd_global(bool, NeverActAsServerClassMachine, true);
61 define_pd_global(uintx, DefaultMaxRAM, 1*G);
62 #define CI_COMPILER_COUNT 0
63 #else
65 #ifdef COMPILER2
66 #define CI_COMPILER_COUNT 2
67 #else
68 #define CI_COMPILER_COUNT 1
69 #endif // COMPILER2
71 #endif // no compilers
74 // string type aliases used only in this file
75 typedef const char* ccstr;
76 typedef const char* ccstrlist; // represents string arguments which accumulate
78 enum FlagValueOrigin {
79 DEFAULT = 0,
80 COMMAND_LINE = 1,
81 ENVIRON_VAR = 2,
82 CONFIG_FILE = 3,
83 MANAGEMENT = 4,
84 ERGONOMIC = 5,
85 ATTACH_ON_DEMAND = 6,
86 INTERNAL = 99
87 };
89 struct Flag {
90 const char *type;
91 const char *name;
92 void* addr;
93 const char *kind;
94 FlagValueOrigin origin;
96 // points to all Flags static array
97 static Flag *flags;
99 // number of flags
100 static size_t numFlags;
102 static Flag* find_flag(char* name, size_t length);
104 bool is_bool() const { return strcmp(type, "bool") == 0; }
105 bool get_bool() const { return *((bool*) addr); }
106 void set_bool(bool value) { *((bool*) addr) = value; }
108 bool is_intx() const { return strcmp(type, "intx") == 0; }
109 intx get_intx() const { return *((intx*) addr); }
110 void set_intx(intx value) { *((intx*) addr) = value; }
112 bool is_uintx() const { return strcmp(type, "uintx") == 0; }
113 uintx get_uintx() const { return *((uintx*) addr); }
114 void set_uintx(uintx value) { *((uintx*) addr) = value; }
116 bool is_double() const { return strcmp(type, "double") == 0; }
117 double get_double() const { return *((double*) addr); }
118 void set_double(double value) { *((double*) addr) = value; }
120 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
121 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
122 ccstr get_ccstr() const { return *((ccstr*) addr); }
123 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
125 bool is_unlocker() const;
126 bool is_unlocked() const;
127 bool is_writeable() const;
128 bool is_external() const;
130 void print_on(outputStream* st);
131 void print_as_flag(outputStream* st);
132 };
134 // debug flags control various aspects of the VM and are global accessible
136 // use FlagSetting to temporarily change some debug flag
137 // e.g. FlagSetting fs(DebugThisAndThat, true);
138 // restored to previous value upon leaving scope
139 class FlagSetting {
140 bool val;
141 bool* flag;
142 public:
143 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
144 ~FlagSetting() { *flag = val; }
145 };
148 class CounterSetting {
149 intx* counter;
150 public:
151 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
152 ~CounterSetting() { (*counter)--; }
153 };
156 class IntFlagSetting {
157 intx val;
158 intx* flag;
159 public:
160 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
161 ~IntFlagSetting() { *flag = val; }
162 };
165 class DoubleFlagSetting {
166 double val;
167 double* flag;
168 public:
169 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
170 ~DoubleFlagSetting() { *flag = val; }
171 };
174 class CommandLineFlags {
175 public:
176 static bool boolAt(char* name, size_t len, bool* value);
177 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
178 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
179 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
181 static bool intxAt(char* name, size_t len, intx* value);
182 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
183 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
184 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
186 static bool uintxAt(char* name, size_t len, uintx* value);
187 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
188 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
189 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
191 static bool doubleAt(char* name, size_t len, double* value);
192 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
193 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
194 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
196 static bool ccstrAt(char* name, size_t len, ccstr* value);
197 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
198 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
199 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
201 // Returns false if name is not a command line flag.
202 static bool wasSetOnCmdline(const char* name, bool* value);
203 static void printSetFlags();
205 static void printFlags() PRODUCT_RETURN;
207 static void verify() PRODUCT_RETURN;
208 };
210 // use this for flags that are true by default in the debug version but
211 // false in the optimized version, and vice versa
212 #ifdef ASSERT
213 #define trueInDebug true
214 #define falseInDebug false
215 #else
216 #define trueInDebug false
217 #define falseInDebug true
218 #endif
220 // use this for flags that are true per default in the product build
221 // but false in development builds, and vice versa
222 #ifdef PRODUCT
223 #define trueInProduct true
224 #define falseInProduct false
225 #else
226 #define trueInProduct false
227 #define falseInProduct true
228 #endif
230 // use this for flags that are true per default in the tiered build
231 // but false in non-tiered builds, and vice versa
232 #ifdef TIERED
233 #define trueInTiered true
234 #define falseInTiered false
235 #else
236 #define trueInTiered false
237 #define falseInTiered true
238 #endif
240 // develop flags are settable / visible only during development and are constant in the PRODUCT version
241 // product flags are always settable / visible
242 // notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
244 // A flag must be declared with one of the following types:
245 // bool, intx, uintx, ccstr.
246 // The type "ccstr" is an alias for "const char*" and is used
247 // only in this file, because the macrology requires single-token type names.
249 // Note: Diagnostic options not meant for VM tuning or for product modes.
250 // They are to be used for VM quality assurance or field diagnosis
251 // of VM bugs. They are hidden so that users will not be encouraged to
252 // try them as if they were VM ordinary execution options. However, they
253 // are available in the product version of the VM. Under instruction
254 // from support engineers, VM customers can turn them on to collect
255 // diagnostic information about VM problems. To use a VM diagnostic
256 // option, you must first specify +UnlockDiagnosticVMOptions.
257 // (This master switch also affects the behavior of -Xprintflags.)
259 // manageable flags are writeable external product flags.
260 // They are dynamically writeable through the JDK management interface
261 // (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
262 // These flags are external exported interface (see CCC). The list of
263 // manageable flags can be queried programmatically through the management
264 // interface.
265 //
266 // A flag can be made as "manageable" only if
267 // - the flag is defined in a CCC as an external exported interface.
268 // - the VM implementation supports dynamic setting of the flag.
269 // This implies that the VM must *always* query the flag variable
270 // and not reuse state related to the flag state at any given time.
271 // - you want the flag to be queried programmatically by the customers.
272 //
273 // product_rw flags are writeable internal product flags.
274 // They are like "manageable" flags but for internal/private use.
275 // The list of product_rw flags are internal/private flags which
276 // may be changed/removed in a future release. It can be set
277 // through the management interface to get/set value
278 // when the name of flag is supplied.
279 //
280 // A flag can be made as "product_rw" only if
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 //
285 // Note that when there is a need to support develop flags to be writeable,
286 // it can be done in the same way as product_rw.
288 #define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct, manageable, product_rw, lp64_product) \
289 \
290 lp64_product(bool, UseCompressedOops, false, \
291 "Use 32-bit object references in 64-bit VM. " \
292 "lp64_product means flag is always constant in 32 bit VM") \
293 \
294 /* UseMembar is theoretically a temp flag used for memory barrier \
295 * removal testing. It was supposed to be removed before FCS but has \
296 * been re-added (see 6401008) */ \
297 product(bool, UseMembar, false, \
298 "(Unstable) Issues membars on thread state transitions") \
299 \
300 product(bool, PrintCommandLineFlags, false, \
301 "Prints flags that appeared on the command line") \
302 \
303 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \
304 "Enable processing of flags relating to field diagnostics") \
305 \
306 product(bool, JavaMonitorsInStackTrace, true, \
307 "Print info. about Java monitor locks when the stacks are dumped")\
308 \
309 product_pd(bool, UseLargePages, \
310 "Use large page memory") \
311 \
312 develop(bool, TracePageSizes, false, \
313 "Trace page size selection and usage.") \
314 \
315 product(bool, UseNUMA, false, \
316 "Use NUMA if available") \
317 \
318 product(intx, NUMAChunkResizeWeight, 20, \
319 "Percentage (0-100) used to weight the current sample when " \
320 "computing exponentially decaying average for " \
321 "AdaptiveNUMAChunkSizing") \
322 \
323 product(intx, NUMASpaceResizeRate, 1*G, \
324 "Do not reallocate more that this amount per collection") \
325 \
326 product(bool, UseAdaptiveNUMAChunkSizing, true, \
327 "Enable adaptive chunk sizing for NUMA") \
328 \
329 product(bool, NUMAStats, false, \
330 "Print NUMA stats in detailed heap information") \
331 \
332 product(intx, NUMAPageScanRate, 256, \
333 "Maximum number of pages to include in the page scan procedure") \
334 \
335 product_pd(bool, NeedsDeoptSuspend, \
336 "True for register window machines (sparc/ia64)") \
337 \
338 product(intx, UseSSE, 99, \
339 "Highest supported SSE instructions set on x86/x64") \
340 \
341 product(uintx, LargePageSizeInBytes, 0, \
342 "Large page size (0 to let VM choose the page size") \
343 \
344 product(uintx, LargePageHeapSizeThreshold, 128*M, \
345 "Use large pages if max heap is at least this big") \
346 \
347 product(bool, ForceTimeHighResolution, false, \
348 "Using high time resolution(For Win32 only)") \
349 \
350 develop(bool, TraceItables, false, \
351 "Trace initialization and use of itables") \
352 \
353 develop(bool, TracePcPatching, false, \
354 "Trace usage of frame::patch_pc") \
355 \
356 develop(bool, TraceJumps, false, \
357 "Trace assembly jumps in thread ring buffer") \
358 \
359 develop(bool, TraceRelocator, false, \
360 "Trace the bytecode relocator") \
361 \
362 develop(bool, TraceLongCompiles, false, \
363 "Print out every time compilation is longer than " \
364 "a given threashold") \
365 \
366 develop(bool, SafepointALot, false, \
367 "Generates a lot of safepoints. Works with " \
368 "GuaranteedSafepointInterval") \
369 \
370 product_pd(bool, BackgroundCompilation, \
371 "A thread requesting compilation is not blocked during " \
372 "compilation") \
373 \
374 product(bool, PrintVMQWaitTime, false, \
375 "Prints out the waiting time in VM operation queue") \
376 \
377 develop(bool, BailoutToInterpreterForThrows, false, \
378 "Compiled methods which throws/catches exceptions will be " \
379 "deopt and intp.") \
380 \
381 develop(bool, NoYieldsInMicrolock, false, \
382 "Disable yields in microlock") \
383 \
384 develop(bool, TraceOopMapGeneration, false, \
385 "Shows oopmap generation") \
386 \
387 product(bool, MethodFlushing, true, \
388 "Reclamation of zombie and not-entrant methods") \
389 \
390 develop(bool, VerifyStack, false, \
391 "Verify stack of each thread when it is entering a runtime call") \
392 \
393 develop(bool, ForceUnreachable, false, \
394 "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \
395 \
396 notproduct(bool, StressDerivedPointers, false, \
397 "Force scavenge when a derived pointers is detected on stack " \
398 "after rtm call") \
399 \
400 develop(bool, TraceDerivedPointers, false, \
401 "Trace traversal of derived pointers on stack") \
402 \
403 notproduct(bool, TraceCodeBlobStacks, false, \
404 "Trace stack-walk of codeblobs") \
405 \
406 product(bool, PrintJNIResolving, false, \
407 "Used to implement -v:jni") \
408 \
409 notproduct(bool, PrintRewrites, false, \
410 "Print methods that are being rewritten") \
411 \
412 product(bool, UseInlineCaches, true, \
413 "Use Inline Caches for virtual calls ") \
414 \
415 develop(bool, InlineArrayCopy, true, \
416 "inline arraycopy native that is known to be part of " \
417 "base library DLL") \
418 \
419 develop(bool, InlineObjectHash, true, \
420 "inline Object::hashCode() native that is known to be part " \
421 "of base library DLL") \
422 \
423 develop(bool, InlineObjectCopy, true, \
424 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \
425 \
426 develop(bool, InlineNatives, true, \
427 "inline natives that are known to be part of base library DLL") \
428 \
429 develop(bool, InlineMathNatives, true, \
430 "inline SinD, CosD, etc.") \
431 \
432 develop(bool, InlineClassNatives, true, \
433 "inline Class.isInstance, etc") \
434 \
435 develop(bool, InlineAtomicLong, true, \
436 "inline sun.misc.AtomicLong") \
437 \
438 develop(bool, InlineThreadNatives, true, \
439 "inline Thread.currentThread, etc") \
440 \
441 develop(bool, InlineReflectionGetCallerClass, true, \
442 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\
443 "of base library DLL") \
444 \
445 develop(bool, InlineUnsafeOps, true, \
446 "inline memory ops (native methods) from sun.misc.Unsafe") \
447 \
448 develop(bool, ConvertCmpD2CmpF, true, \
449 "Convert cmpD to cmpF when one input is constant in float range") \
450 \
451 develop(bool, ConvertFloat2IntClipping, true, \
452 "Convert float2int clipping idiom to integer clipping") \
453 \
454 develop(bool, SpecialStringCompareTo, true, \
455 "special version of string compareTo") \
456 \
457 develop(bool, SpecialStringIndexOf, true, \
458 "special version of string indexOf") \
459 \
460 develop(bool, TraceCallFixup, false, \
461 "traces all call fixups") \
462 \
463 develop(bool, DeoptimizeALot, false, \
464 "deoptimize at every exit from the runtime system") \
465 \
466 develop(ccstrlist, DeoptimizeOnlyAt, "", \
467 "a comma separated list of bcis to deoptimize at") \
468 \
469 product(bool, DeoptimizeRandom, false, \
470 "deoptimize random frames on random exit from the runtime system")\
471 \
472 notproduct(bool, ZombieALot, false, \
473 "creates zombies (non-entrant) at exit from the runt. system") \
474 \
475 notproduct(bool, WalkStackALot, false, \
476 "trace stack (no print) at every exit from the runtime system") \
477 \
478 develop(bool, Debugging, false, \
479 "set when executing debug methods in debug.ccp " \
480 "(to prevent triggering assertions)") \
481 \
482 notproduct(bool, StrictSafepointChecks, trueInDebug, \
483 "Enable strict checks that safepoints cannot happen for threads " \
484 "that used No_Safepoint_Verifier") \
485 \
486 notproduct(bool, VerifyLastFrame, false, \
487 "Verify oops on last frame on entry to VM") \
488 \
489 develop(bool, TraceHandleAllocation, false, \
490 "Prints out warnings when suspicious many handles are allocated") \
491 \
492 product(bool, UseCompilerSafepoints, true, \
493 "Stop at safepoints in compiled code") \
494 \
495 product(bool, UseSplitVerifier, true, \
496 "use split verifier with StackMapTable attributes") \
497 \
498 product(bool, FailOverToOldVerifier, true, \
499 "fail over to old verifier when split verifier fails") \
500 \
501 develop(bool, ShowSafepointMsgs, false, \
502 "Show msg. about safepoint synch.") \
503 \
504 product(bool, SafepointTimeout, false, \
505 "Time out and warn or fail after SafepointTimeoutDelay " \
506 "milliseconds if failed to reach safepoint") \
507 \
508 develop(bool, DieOnSafepointTimeout, false, \
509 "Die upon failure to reach safepoint (see SafepointTimeout)") \
510 \
511 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \
512 /* typically, at most a few retries are needed */ \
513 product(intx, SuspendRetryCount, 50, \
514 "Maximum retry count for an external suspend request") \
515 \
516 product(intx, SuspendRetryDelay, 5, \
517 "Milliseconds to delay per retry (* current_retry_count)") \
518 \
519 product(bool, AssertOnSuspendWaitFailure, false, \
520 "Assert/Guarantee on external suspend wait failure") \
521 \
522 product(bool, TraceSuspendWaitFailures, false, \
523 "Trace external suspend wait failures") \
524 \
525 product(bool, MaxFDLimit, true, \
526 "Bump the number of file descriptors to max in solaris.") \
527 \
528 notproduct(bool, LogEvents, trueInDebug, \
529 "Enable Event log") \
530 \
531 product(bool, BytecodeVerificationRemote, true, \
532 "Enables the Java bytecode verifier for remote classes") \
533 \
534 product(bool, BytecodeVerificationLocal, false, \
535 "Enables the Java bytecode verifier for local classes") \
536 \
537 develop(bool, ForceFloatExceptions, trueInDebug, \
538 "Force exceptions on FP stack under/overflow") \
539 \
540 develop(bool, SoftMatchFailure, trueInProduct, \
541 "If the DFA fails to match a node, print a message and bail out") \
542 \
543 develop(bool, VerifyStackAtCalls, false, \
544 "Verify that the stack pointer is unchanged after calls") \
545 \
546 develop(bool, TraceJavaAssertions, false, \
547 "Trace java language assertions") \
548 \
549 notproduct(bool, CheckAssertionStatusDirectives, false, \
550 "temporary - see javaClasses.cpp") \
551 \
552 notproduct(bool, PrintMallocFree, false, \
553 "Trace calls to C heap malloc/free allocation") \
554 \
555 notproduct(bool, PrintOopAddress, false, \
556 "Always print the location of the oop") \
557 \
558 notproduct(bool, VerifyCodeCacheOften, false, \
559 "Verify compiled-code cache often") \
560 \
561 develop(bool, ZapDeadCompiledLocals, false, \
562 "Zap dead locals in compiler frames") \
563 \
564 notproduct(bool, ZapDeadLocalsOld, false, \
565 "Zap dead locals (old version, zaps all frames when " \
566 "entering the VM") \
567 \
568 notproduct(bool, CheckOopishValues, false, \
569 "Warn if value contains oop ( requires ZapDeadLocals)") \
570 \
571 develop(bool, UseMallocOnly, false, \
572 "use only malloc/free for allocation (no resource area/arena)") \
573 \
574 develop(bool, PrintMalloc, false, \
575 "print all malloc/free calls") \
576 \
577 develop(bool, ZapResourceArea, trueInDebug, \
578 "Zap freed resource/arena space with 0xABABABAB") \
579 \
580 notproduct(bool, ZapVMHandleArea, trueInDebug, \
581 "Zap freed VM handle space with 0xBCBCBCBC") \
582 \
583 develop(bool, ZapJNIHandleArea, trueInDebug, \
584 "Zap freed JNI handle space with 0xFEFEFEFE") \
585 \
586 develop(bool, ZapUnusedHeapArea, false, \
587 "Zap unused heap space with 0xBAADBABE") \
588 \
589 develop(bool, PrintVMMessages, true, \
590 "Print vm messages on console") \
591 \
592 product(bool, PrintGCApplicationConcurrentTime, false, \
593 "Print the time the application has been running") \
594 \
595 product(bool, PrintGCApplicationStoppedTime, false, \
596 "Print the time the application has been stopped") \
597 \
598 develop(bool, Verbose, false, \
599 "Prints additional debugging information from other modes") \
600 \
601 develop(bool, PrintMiscellaneous, false, \
602 "Prints uncategorized debugging information (requires +Verbose)") \
603 \
604 develop(bool, WizardMode, false, \
605 "Prints much more debugging information") \
606 \
607 product(bool, ShowMessageBoxOnError, false, \
608 "Keep process alive on VM fatal error") \
609 \
610 product_pd(bool, UseOSErrorReporting, \
611 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \
612 \
613 product(bool, SuppressFatalErrorMessage, false, \
614 "Do NO Fatal Error report [Avoid deadlock]") \
615 \
616 product(ccstrlist, OnError, "", \
617 "Run user-defined commands on fatal error; see VMError.cpp " \
618 "for examples") \
619 \
620 product(ccstrlist, OnOutOfMemoryError, "", \
621 "Run user-defined commands on first java.lang.OutOfMemoryError") \
622 \
623 manageable(bool, HeapDumpOnOutOfMemoryError, false, \
624 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \
625 \
626 manageable(ccstr, HeapDumpPath, NULL, \
627 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
628 "directory) of the dump file (defaults to java_pid<pid>.hprof" \
629 "in the working directory)") \
630 \
631 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
632 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \
633 "when the heap usage is larger than this") \
634 \
635 develop(uintx, HeapDumpSegmentSize, 1*G, \
636 "Approximate segment size when generating a segmented heap dump") \
637 \
638 develop(bool, BreakAtWarning, false, \
639 "Execute breakpoint upon encountering VM warning") \
640 \
641 product_pd(bool, UseVectoredExceptions, \
642 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
643 \
644 develop(bool, TraceVMOperation, false, \
645 "Trace vm operations") \
646 \
647 develop(bool, UseFakeTimers, false, \
648 "Tells whether the VM should use system time or a fake timer") \
649 \
650 diagnostic(bool, LogCompilation, false, \
651 "Log compilation activity in detail to hotspot.log or LogFile") \
652 \
653 product(bool, PrintCompilation, false, \
654 "Print compilations") \
655 \
656 diagnostic(bool, TraceNMethodInstalls, false, \
657 "Trace nmethod intallation") \
658 \
659 diagnostic(bool, TraceOSRBreakpoint, false, \
660 "Trace OSR Breakpoint ") \
661 \
662 diagnostic(bool, TraceCompileTriggered, false, \
663 "Trace compile triggered") \
664 \
665 diagnostic(bool, TraceTriggers, false, \
666 "Trace triggers") \
667 \
668 product(bool, AlwaysRestoreFPU, false, \
669 "Restore the FPU control word after every JNI call (expensive)") \
670 \
671 notproduct(bool, PrintCompilation2, false, \
672 "Print additional statistics per compilation") \
673 \
674 diagnostic(bool, PrintAdapterHandlers, false, \
675 "Print code generated for i2c/c2i adapters") \
676 \
677 diagnostic(bool, PrintAssembly, false, \
678 "Print assembly code (using external disassembler.so)") \
679 \
680 diagnostic(ccstr, PrintAssemblyOptions, false, \
681 "Options string passed to disassembler.so") \
682 \
683 diagnostic(bool, PrintNMethods, false, \
684 "Print assembly code for nmethods when generated") \
685 \
686 diagnostic(bool, PrintNativeNMethods, false, \
687 "Print assembly code for native nmethods when generated") \
688 \
689 develop(bool, PrintDebugInfo, false, \
690 "Print debug information for all nmethods when generated") \
691 \
692 develop(bool, PrintRelocations, false, \
693 "Print relocation information for all nmethods when generated") \
694 \
695 develop(bool, PrintDependencies, false, \
696 "Print dependency information for all nmethods when generated") \
697 \
698 develop(bool, PrintExceptionHandlers, false, \
699 "Print exception handler tables for all nmethods when generated") \
700 \
701 develop(bool, InterceptOSException, false, \
702 "Starts debugger when an implicit OS (e.g., NULL) " \
703 "exception happens") \
704 \
705 notproduct(bool, PrintCodeCache, false, \
706 "Print the compiled_code cache when exiting") \
707 \
708 develop(bool, PrintCodeCache2, false, \
709 "Print detailed info on the compiled_code cache when exiting") \
710 \
711 diagnostic(bool, PrintStubCode, false, \
712 "Print generated stub code") \
713 \
714 product(bool, StackTraceInThrowable, true, \
715 "Collect backtrace in throwable when exception happens") \
716 \
717 product(bool, OmitStackTraceInFastThrow, true, \
718 "Omit backtraces for some 'hot' exceptions in optimized code") \
719 \
720 product(bool, ProfilerPrintByteCodeStatistics, false, \
721 "Prints byte code statictics when dumping profiler output") \
722 \
723 product(bool, ProfilerRecordPC, false, \
724 "Collects tick for each 16 byte interval of compiled code") \
725 \
726 product(bool, ProfileVM, false, \
727 "Profiles ticks that fall within VM (either in the VM Thread " \
728 "or VM code called through stubs)") \
729 \
730 product(bool, ProfileIntervals, false, \
731 "Prints profiles for each interval (see ProfileIntervalsTicks)") \
732 \
733 notproduct(bool, ProfilerCheckIntervals, false, \
734 "Collect and print info on spacing of profiler ticks") \
735 \
736 develop(bool, PrintJVMWarnings, false, \
737 "Prints warnings for unimplemented JVM functions") \
738 \
739 notproduct(uintx, WarnOnStalledSpinLock, 0, \
740 "Prints warnings for stalled SpinLocks") \
741 \
742 develop(bool, InitializeJavaLangSystem, true, \
743 "Initialize java.lang.System - turn off for individual " \
744 "method debugging") \
745 \
746 develop(bool, InitializeJavaLangString, true, \
747 "Initialize java.lang.String - turn off for individual " \
748 "method debugging") \
749 \
750 develop(bool, InitializeJavaLangExceptionsErrors, true, \
751 "Initialize various error and exception classes - turn off for " \
752 "individual method debugging") \
753 \
754 product(bool, RegisterFinalizersAtInit, true, \
755 "Register finalizable objects at end of Object.<init> or " \
756 "after allocation.") \
757 \
758 develop(bool, RegisterReferences, true, \
759 "Tells whether the VM should register soft/weak/final/phantom " \
760 "references") \
761 \
762 develop(bool, IgnoreRewrites, false, \
763 "Supress rewrites of bytecodes in the oopmap generator. " \
764 "This is unsafe!") \
765 \
766 develop(bool, PrintCodeCacheExtension, false, \
767 "Print extension of code cache") \
768 \
769 develop(bool, UsePrivilegedStack, true, \
770 "Enable the security JVM functions") \
771 \
772 develop(bool, IEEEPrecision, true, \
773 "Enables IEEE precision (for INTEL only)") \
774 \
775 develop(bool, ProtectionDomainVerification, true, \
776 "Verifies protection domain before resolution in system " \
777 "dictionary") \
778 \
779 product(bool, ClassUnloading, true, \
780 "Do unloading of classes") \
781 \
782 develop(bool, DisableStartThread, false, \
783 "Disable starting of additional Java threads " \
784 "(for debugging only)") \
785 \
786 develop(bool, MemProfiling, false, \
787 "Write memory usage profiling to log file") \
788 \
789 notproduct(bool, PrintSystemDictionaryAtExit, false, \
790 "Prints the system dictionary at exit") \
791 \
792 diagnostic(bool, UnsyncloadClass, false, \
793 "Unstable: VM calls loadClass unsynchronized. Custom classloader "\
794 "must call VM synchronized for findClass & defineClass") \
795 \
796 product_pd(bool, DontYieldALot, \
797 "Throw away obvious excess yield calls (for SOLARIS only)") \
798 \
799 product_pd(bool, ConvertSleepToYield, \
800 "Converts sleep(0) to thread yield " \
801 "(may be off for SOLARIS to improve GUI)") \
802 \
803 product(bool, ConvertYieldToSleep, false, \
804 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
805 "behavior (SOLARIS only)") \
806 \
807 product(bool, UseBoundThreads, true, \
808 "Bind user level threads to kernel threads (for SOLARIS only)") \
809 \
810 develop(bool, UseDetachedThreads, true, \
811 "Use detached threads that are recycled upon termination " \
812 "(for SOLARIS only)") \
813 \
814 product(bool, UseLWPSynchronization, true, \
815 "Use LWP-based instead of libthread-based synchronization " \
816 "(SPARC only)") \
817 \
818 product(ccstr, SyncKnobs, "", \
819 "(Unstable) Various monitor synchronization tunables") \
820 \
821 product(intx, EmitSync, 0, \
822 "(Unsafe,Unstable) " \
823 " Controls emission of inline sync fast-path code") \
824 \
825 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \
826 \
827 product(intx, Atomics, 0, \
828 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \
829 \
830 product(intx, FenceInstruction, 0, \
831 "(Unsafe,Unstable) Experimental") \
832 \
833 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
834 \
835 product(intx, SyncVerbose, 0, "(Unstable)" ) \
836 \
837 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
838 \
839 product(intx, hashCode, 0, \
840 "(Unstable) select hashCode generation algorithm" ) \
841 \
842 product(intx, WorkAroundNPTLTimedWaitHang, 1, \
843 "(Unstable, Linux-specific)" \
844 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
845 \
846 product(bool, FilterSpuriousWakeups , true, \
847 "Prevent spurious or premature wakeups from object.wait" \
848 "(Solaris only)") \
849 \
850 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
851 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
852 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
853 \
854 develop(bool, UsePthreads, false, \
855 "Use pthread-based instead of libthread-based synchronization " \
856 "(SPARC only)") \
857 \
858 product(bool, AdjustConcurrency, false, \
859 "call thr_setconcurrency at thread create time to avoid " \
860 "LWP starvation on MP systems (For Solaris Only)") \
861 \
862 develop(bool, UpdateHotSpotCompilerFileOnError, true, \
863 "Should the system attempt to update the compiler file when " \
864 "an error occurs?") \
865 \
866 product(bool, ReduceSignalUsage, false, \
867 "Reduce the use of OS signals in Java and/or the VM") \
868 \
869 notproduct(bool, ValidateMarkSweep, false, \
870 "Do extra validation during MarkSweep collection") \
871 \
872 notproduct(bool, RecordMarkSweepCompaction, false, \
873 "Enable GC-to-GC recording and querying of compaction during " \
874 "MarkSweep") \
875 \
876 develop_pd(bool, ShareVtableStubs, \
877 "Share vtable stubs (smaller code but worse branch prediction") \
878 \
879 develop(bool, LoadLineNumberTables, true, \
880 "Tells whether the class file parser loads line number tables") \
881 \
882 develop(bool, LoadLocalVariableTables, true, \
883 "Tells whether the class file parser loads local variable tables")\
884 \
885 develop(bool, LoadLocalVariableTypeTables, true, \
886 "Tells whether the class file parser loads local variable type tables")\
887 \
888 product(bool, AllowUserSignalHandlers, false, \
889 "Do not complain if the application installs signal handlers " \
890 "(Solaris & Linux only)") \
891 \
892 product(bool, UseSignalChaining, true, \
893 "Use signal-chaining to invoke signal handlers installed " \
894 "by the application (Solaris & Linux only)") \
895 \
896 product(bool, UseAltSigs, false, \
897 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \
898 "internal signals. (Solaris only)") \
899 \
900 product(bool, UseSpinning, false, \
901 "Use spinning in monitor inflation and before entry") \
902 \
903 product(bool, PreSpinYield, false, \
904 "Yield before inner spinning loop") \
905 \
906 product(bool, PostSpinYield, true, \
907 "Yield after inner spinning loop") \
908 \
909 product(bool, AllowJNIEnvProxy, false, \
910 "Allow JNIEnv proxies for jdbx") \
911 \
912 product(bool, JNIDetachReleasesMonitors, true, \
913 "JNI DetachCurrentThread releases monitors owned by thread") \
914 \
915 product(bool, RestoreMXCSROnJNICalls, false, \
916 "Restore MXCSR when returning from JNI calls") \
917 \
918 product(bool, CheckJNICalls, false, \
919 "Verify all arguments to JNI calls") \
920 \
921 product(bool, UseFastJNIAccessors, true, \
922 "Use optimized versions of Get<Primitive>Field") \
923 \
924 product(bool, EagerXrunInit, false, \
925 "Eagerly initialize -Xrun libraries; allows startup profiling, " \
926 " but not all -Xrun libraries may support the state of the VM at this time") \
927 \
928 product(bool, PreserveAllAnnotations, false, \
929 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
930 \
931 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
932 "Number of OutOfMemoryErrors preallocated with backtrace") \
933 \
934 product(bool, LazyBootClassLoader, true, \
935 "Enable/disable lazy opening of boot class path entries") \
936 \
937 diagnostic(bool, UseIncDec, true, \
938 "Use INC, DEC instructions on x86") \
939 \
940 product(bool, UseStoreImmI16, true, \
941 "Use store immediate 16-bits value instruction on x86") \
942 \
943 product(bool, UseAddressNop, false, \
944 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \
945 \
946 product(bool, UseXmmLoadAndClearUpper, true, \
947 "Load low part of XMM register and clear upper part") \
948 \
949 product(bool, UseXmmRegToRegMoveAll, false, \
950 "Copy all XMM register bits when moving value between registers") \
951 \
952 product(bool, UseXmmI2D, false, \
953 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \
954 \
955 product(bool, UseXmmI2F, false, \
956 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \
957 \
958 product(intx, FieldsAllocationStyle, 1, \
959 "0 - type based with oops first, 1 - with oops last") \
960 \
961 product(bool, CompactFields, true, \
962 "Allocate nonstatic fields in gaps between previous fields") \
963 \
964 notproduct(bool, PrintCompactFieldsSavings, false, \
965 "Print how many words were saved with CompactFields") \
966 \
967 product(bool, UseBiasedLocking, true, \
968 "Enable biased locking in JVM") \
969 \
970 product(intx, BiasedLockingStartupDelay, 4000, \
971 "Number of milliseconds to wait before enabling biased locking") \
972 \
973 diagnostic(bool, PrintBiasedLockingStatistics, false, \
974 "Print statistics of biased locking in JVM") \
975 \
976 product(intx, BiasedLockingBulkRebiasThreshold, 20, \
977 "Threshold of number of revocations per type to try to " \
978 "rebias all objects in the heap of that type") \
979 \
980 product(intx, BiasedLockingBulkRevokeThreshold, 40, \
981 "Threshold of number of revocations per type to permanently " \
982 "revoke biases of all objects in the heap of that type") \
983 \
984 product(intx, BiasedLockingDecayTime, 25000, \
985 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \
986 "type after previous bulk rebias") \
987 \
988 /* tracing */ \
989 \
990 notproduct(bool, TraceRuntimeCalls, false, \
991 "Trace run-time calls") \
992 \
993 develop(bool, TraceJNICalls, false, \
994 "Trace JNI calls") \
995 \
996 notproduct(bool, TraceJVMCalls, false, \
997 "Trace JVM calls") \
998 \
999 product(ccstr, TraceJVMTI, "", \
1000 "Trace flags for JVMTI functions and events") \
1001 \
1002 /* This option can change an EMCP method into an obsolete method. */ \
1003 /* This can affect tests that except specific methods to be EMCP. */ \
1004 /* This option should be used with caution. */ \
1005 product(bool, StressLdcRewrite, false, \
1006 "Force ldc -> ldc_w rewrite during RedefineClasses") \
1007 \
1008 product(intx, TraceRedefineClasses, 0, \
1009 "Trace level for JVMTI RedefineClasses") \
1010 \
1011 /* change to false by default sometime after Mustang */ \
1012 product(bool, VerifyMergedCPBytecodes, true, \
1013 "Verify bytecodes after RedefineClasses constant pool merging") \
1014 \
1015 develop(bool, TraceJNIHandleAllocation, false, \
1016 "Trace allocation/deallocation of JNI handle blocks") \
1017 \
1018 develop(bool, TraceThreadEvents, false, \
1019 "Trace all thread events") \
1020 \
1021 develop(bool, TraceBytecodes, false, \
1022 "Trace bytecode execution") \
1023 \
1024 develop(bool, TraceClassInitialization, false, \
1025 "Trace class initialization") \
1026 \
1027 develop(bool, TraceExceptions, false, \
1028 "Trace exceptions") \
1029 \
1030 develop(bool, TraceICs, false, \
1031 "Trace inline cache changes") \
1032 \
1033 notproduct(bool, TraceInvocationCounterOverflow, false, \
1034 "Trace method invocation counter overflow") \
1035 \
1036 develop(bool, TraceInlineCacheClearing, false, \
1037 "Trace clearing of inline caches in nmethods") \
1038 \
1039 develop(bool, TraceDependencies, false, \
1040 "Trace dependencies") \
1041 \
1042 develop(bool, VerifyDependencies, trueInDebug, \
1043 "Exercise and verify the compilation dependency mechanism") \
1044 \
1045 develop(bool, TraceNewOopMapGeneration, false, \
1046 "Trace OopMapGeneration") \
1047 \
1048 develop(bool, TraceNewOopMapGenerationDetailed, false, \
1049 "Trace OopMapGeneration: print detailed cell states") \
1050 \
1051 develop(bool, TimeOopMap, false, \
1052 "Time calls to GenerateOopMap::compute_map() in sum") \
1053 \
1054 develop(bool, TimeOopMap2, false, \
1055 "Time calls to GenerateOopMap::compute_map() individually") \
1056 \
1057 develop(bool, TraceMonitorMismatch, false, \
1058 "Trace monitor matching failures during OopMapGeneration") \
1059 \
1060 develop(bool, TraceOopMapRewrites, false, \
1061 "Trace rewritting of method oops during oop map generation") \
1062 \
1063 develop(bool, TraceSafepoint, false, \
1064 "Trace safepoint operations") \
1065 \
1066 develop(bool, TraceICBuffer, false, \
1067 "Trace usage of IC buffer") \
1068 \
1069 develop(bool, TraceCompiledIC, false, \
1070 "Trace changes of compiled IC") \
1071 \
1072 notproduct(bool, TraceZapDeadLocals, false, \
1073 "Trace zapping dead locals") \
1074 \
1075 develop(bool, TraceStartupTime, false, \
1076 "Trace setup time") \
1077 \
1078 develop(bool, TraceHPI, false, \
1079 "Trace Host Porting Interface (HPI)") \
1080 \
1081 product(ccstr, HPILibPath, NULL, \
1082 "Specify alternate path to HPI library") \
1083 \
1084 develop(bool, TraceProtectionDomainVerification, false, \
1085 "Trace protection domain verifcation") \
1086 \
1087 develop(bool, TraceClearedExceptions, false, \
1088 "Prints when an exception is forcibly cleared") \
1089 \
1090 product(bool, TraceClassResolution, false, \
1091 "Trace all constant pool resolutions (for debugging)") \
1092 \
1093 product(bool, TraceBiasedLocking, false, \
1094 "Trace biased locking in JVM") \
1095 \
1096 product(bool, TraceMonitorInflation, false, \
1097 "Trace monitor inflation in JVM") \
1098 \
1099 /* assembler */ \
1100 product(bool, Use486InstrsOnly, false, \
1101 "Use 80486 Compliant instruction subset") \
1102 \
1103 /* gc */ \
1104 \
1105 product(bool, UseSerialGC, false, \
1106 "Tells whether the VM should use serial garbage collector") \
1107 \
1108 product(bool, UseParallelGC, false, \
1109 "Use the Parallel Scavenge garbage collector") \
1110 \
1111 product(bool, UseParallelOldGC, false, \
1112 "Use the Parallel Old garbage collector") \
1113 \
1114 product(bool, UseParallelOldGCCompacting, true, \
1115 "In the Parallel Old garbage collector use parallel compaction") \
1116 \
1117 product(bool, UseParallelDensePrefixUpdate, true, \
1118 "In the Parallel Old garbage collector use parallel dense" \
1119 " prefix update") \
1120 \
1121 develop(bool, UseParallelOldGCChunkPointerCalc, true, \
1122 "In the Parallel Old garbage collector use chucks to calculate" \
1123 " new object locations") \
1124 \
1125 product(uintx, HeapMaximumCompactionInterval, 20, \
1126 "How often should we maximally compact the heap (not allowing " \
1127 "any dead space)") \
1128 \
1129 product(uintx, HeapFirstMaximumCompactionCount, 3, \
1130 "The collection count for the first maximum compaction") \
1131 \
1132 product(bool, UseMaximumCompactionOnSystemGC, true, \
1133 "In the Parallel Old garbage collector maximum compaction for " \
1134 "a system GC") \
1135 \
1136 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
1137 "The mean used by the par compact dead wood" \
1138 "limiter (a number between 0-100).") \
1139 \
1140 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
1141 "The standard deviation used by the par compact dead wood" \
1142 "limiter (a number between 0-100).") \
1143 \
1144 product(bool, UseParallelOldGCDensePrefix, true, \
1145 "Use a dense prefix with the Parallel Old garbage collector") \
1146 \
1147 product(uintx, ParallelGCThreads, 0, \
1148 "Number of parallel threads parallel gc will use") \
1149 \
1150 product(uintx, ParallelCMSThreads, 0, \
1151 "Max number of threads CMS will use for concurrent work") \
1152 \
1153 develop(bool, VerifyParallelOldWithMarkSweep, false, \
1154 "Use the MarkSweep code to verify phases of Parallel Old") \
1155 \
1156 develop(uintx, VerifyParallelOldWithMarkSweepInterval, 1, \
1157 "Interval at which the MarkSweep code is used to verify " \
1158 "phases of Parallel Old") \
1159 \
1160 develop(bool, ParallelOldMTUnsafeMarkBitMap, false, \
1161 "Use the Parallel Old MT unsafe in marking the bitmap") \
1162 \
1163 develop(bool, ParallelOldMTUnsafeUpdateLiveData, false, \
1164 "Use the Parallel Old MT unsafe in update of live size") \
1165 \
1166 develop(bool, TraceChunkTasksQueuing, false, \
1167 "Trace the queuing of the chunk tasks") \
1168 \
1169 product(uintx, YoungPLABSize, 4096, \
1170 "Size of young gen promotion labs (in HeapWords)") \
1171 \
1172 product(uintx, OldPLABSize, 1024, \
1173 "Size of old gen promotion labs (in HeapWords)") \
1174 \
1175 product(uintx, GCTaskTimeStampEntries, 200, \
1176 "Number of time stamp entries per gc worker thread") \
1177 \
1178 product(bool, AlwaysTenure, false, \
1179 "Always tenure objects in eden. (ParallelGC only)") \
1180 \
1181 product(bool, NeverTenure, false, \
1182 "Never tenure objects in eden, May tenure on overflow" \
1183 " (ParallelGC only)") \
1184 \
1185 product(bool, ScavengeBeforeFullGC, true, \
1186 "Scavenge youngest generation before each full GC," \
1187 " used with UseParallelGC") \
1188 \
1189 develop(bool, ScavengeWithObjectsInToSpace, false, \
1190 "Allow scavenges to occur when to_space contains objects.") \
1191 \
1192 product(bool, UseConcMarkSweepGC, false, \
1193 "Use Concurrent Mark-Sweep GC in the old generation") \
1194 \
1195 product(bool, ExplicitGCInvokesConcurrent, false, \
1196 "A System.gc() request invokes a concurrent collection;" \
1197 " (effective only when UseConcMarkSweepGC)") \
1198 \
1199 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
1200 "A System.gc() request invokes a concurrent collection and" \
1201 " also unloads classes during such a concurrent gc cycle " \
1202 " (effective only when UseConcMarkSweepGC)") \
1203 \
1204 develop(bool, UseCMSAdaptiveFreeLists, true, \
1205 "Use Adaptive Free Lists in the CMS generation") \
1206 \
1207 develop(bool, UseAsyncConcMarkSweepGC, true, \
1208 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1209 \
1210 develop(bool, RotateCMSCollectionTypes, false, \
1211 "Rotate the CMS collections among concurrent and STW") \
1212 \
1213 product(bool, UseCMSBestFit, true, \
1214 "Use CMS best fit allocation strategy") \
1215 \
1216 product(bool, UseCMSCollectionPassing, true, \
1217 "Use passing of collection from background to foreground") \
1218 \
1219 product(bool, UseParNewGC, false, \
1220 "Use parallel threads in the new generation.") \
1221 \
1222 product(bool, ParallelGCVerbose, false, \
1223 "Verbose output for parallel GC.") \
1224 \
1225 product(intx, ParallelGCBufferWastePct, 10, \
1226 "wasted fraction of parallel allocation buffer.") \
1227 \
1228 product(bool, ParallelGCRetainPLAB, true, \
1229 "Retain parallel allocation buffers across scavenges.") \
1230 \
1231 product(intx, TargetPLABWastePct, 10, \
1232 "target wasted space in last buffer as pct of overall allocation")\
1233 \
1234 product(uintx, PLABWeight, 75, \
1235 "Percentage (0-100) used to weight the current sample when" \
1236 "computing exponentially decaying average for ResizePLAB.") \
1237 \
1238 product(bool, ResizePLAB, true, \
1239 "Dynamically resize (survivor space) promotion labs") \
1240 \
1241 product(bool, PrintPLAB, false, \
1242 "Print (survivor space) promotion labs sizing decisions") \
1243 \
1244 product(intx, ParGCArrayScanChunk, 50, \
1245 "Scan a subset and push remainder, if array is bigger than this") \
1246 \
1247 product(intx, ParGCDesiredObjsFromOverflowList, 20, \
1248 "The desired number of objects to claim from the overflow list") \
1249 \
1250 product(uintx, CMSParPromoteBlocksToClaim, 50, \
1251 "Number of blocks to attempt to claim when refilling CMS LAB for "\
1252 "parallel GC.") \
1253 \
1254 product(bool, AlwaysPreTouch, false, \
1255 "It forces all freshly committed pages to be pre-touched.") \
1256 \
1257 product(bool, CMSUseOldDefaults, false, \
1258 "A flag temporarily introduced to allow reverting to some older" \
1259 "default settings; older as of 6.0 ") \
1260 \
1261 product(intx, CMSYoungGenPerWorker, 16*M, \
1262 "The amount of young gen chosen by default per GC worker " \
1263 "thread available ") \
1264 \
1265 product(bool, CMSIncrementalMode, false, \
1266 "Whether CMS GC should operate in \"incremental\" mode") \
1267 \
1268 product(uintx, CMSIncrementalDutyCycle, 10, \
1269 "CMS incremental mode duty cycle (a percentage, 0-100). If" \
1270 "CMSIncrementalPacing is enabled, then this is just the initial" \
1271 "value") \
1272 \
1273 product(bool, CMSIncrementalPacing, true, \
1274 "Whether the CMS incremental mode duty cycle should be " \
1275 "automatically adjusted") \
1276 \
1277 product(uintx, CMSIncrementalDutyCycleMin, 0, \
1278 "Lower bound on the duty cycle when CMSIncrementalPacing is" \
1279 "enabled (a percentage, 0-100).") \
1280 \
1281 product(uintx, CMSIncrementalSafetyFactor, 10, \
1282 "Percentage (0-100) used to add conservatism when computing the" \
1283 "duty cycle.") \
1284 \
1285 product(uintx, CMSIncrementalOffset, 0, \
1286 "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1287 "is shifted to the right within the period between young GCs") \
1288 \
1289 product(uintx, CMSExpAvgFactor, 25, \
1290 "Percentage (0-100) used to weight the current sample when" \
1291 "computing exponential averages for CMS statistics.") \
1292 \
1293 product(uintx, CMS_FLSWeight, 50, \
1294 "Percentage (0-100) used to weight the current sample when" \
1295 "computing exponentially decating averages for CMS FLS statistics.") \
1296 \
1297 product(uintx, CMS_FLSPadding, 2, \
1298 "The multiple of deviation from mean to use for buffering" \
1299 "against volatility in free list demand.") \
1300 \
1301 product(uintx, FLSCoalescePolicy, 2, \
1302 "CMS: Aggression level for coalescing, increasing from 0 to 4") \
1303 \
1304 product(uintx, CMS_SweepWeight, 50, \
1305 "Percentage (0-100) used to weight the current sample when" \
1306 "computing exponentially decaying average for inter-sweep duration.") \
1307 \
1308 product(uintx, CMS_SweepPadding, 2, \
1309 "The multiple of deviation from mean to use for buffering" \
1310 "against volatility in inter-sweep duration.") \
1311 \
1312 product(uintx, CMS_SweepTimerThresholdMillis, 10, \
1313 "Skip block flux-rate sampling for an epoch unless inter-sweep " \
1314 " duration exceeds this threhold in milliseconds") \
1315 \
1316 develop(bool, CMSTraceIncrementalMode, false, \
1317 "Trace CMS incremental mode") \
1318 \
1319 develop(bool, CMSTraceIncrementalPacing, false, \
1320 "Trace CMS incremental mode pacing computation") \
1321 \
1322 develop(bool, CMSTraceThreadState, false, \
1323 "Trace the CMS thread state (enable the trace_state() method)") \
1324 \
1325 product(bool, CMSClassUnloadingEnabled, false, \
1326 "Whether class unloading enabled when using CMS GC") \
1327 \
1328 product(uintx, CMSClassUnloadingMaxInterval, 0, \
1329 "When CMS class unloading is enabled, the maximum CMS cycle count"\
1330 " for which classes may not be unloaded") \
1331 \
1332 product(bool, CMSCompactWhenClearAllSoftRefs, true, \
1333 "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1334 \
1335 product(bool, UseCMSCompactAtFullCollection, true, \
1336 "Use mark sweep compact at full collections") \
1337 \
1338 product(uintx, CMSFullGCsBeforeCompaction, 0, \
1339 "Number of CMS full collection done before compaction if > 0") \
1340 \
1341 develop(intx, CMSDictionaryChoice, 0, \
1342 "Use BinaryTreeDictionary as default in the CMS generation") \
1343 \
1344 product(uintx, CMSIndexedFreeListReplenish, 4, \
1345 "Replenish and indexed free list with this number of chunks") \
1346 \
1347 product(bool, CMSLoopWarn, false, \
1348 "Warn in case of excessive CMS looping") \
1349 \
1350 develop(bool, CMSOverflowEarlyRestoration, false, \
1351 "Whether preserved marks should be restored early") \
1352 \
1353 product(uintx, CMSMarkStackSize, 32*K, \
1354 "Size of CMS marking stack") \
1355 \
1356 product(uintx, CMSMarkStackSizeMax, 4*M, \
1357 "Max size of CMS marking stack") \
1358 \
1359 notproduct(bool, CMSMarkStackOverflowALot, false, \
1360 "Whether we should simulate frequent marking stack / work queue" \
1361 " overflow") \
1362 \
1363 notproduct(intx, CMSMarkStackOverflowInterval, 1000, \
1364 "A per-thread `interval' counter that determines how frequently" \
1365 " we simulate overflow; a smaller number increases frequency") \
1366 \
1367 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
1368 "(Temporary, subject to experimentation)" \
1369 "Maximum number of abortable preclean iterations, if > 0") \
1370 \
1371 product(intx, CMSMaxAbortablePrecleanTime, 5000, \
1372 "(Temporary, subject to experimentation)" \
1373 "Maximum time in abortable preclean in ms") \
1374 \
1375 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
1376 "(Temporary, subject to experimentation)" \
1377 "Nominal minimum work per abortable preclean iteration") \
1378 \
1379 product(intx, CMSAbortablePrecleanWaitMillis, 100, \
1380 "(Temporary, subject to experimentation)" \
1381 " Time that we sleep between iterations when not given" \
1382 " enough work per iteration") \
1383 \
1384 product(uintx, CMSRescanMultiple, 32, \
1385 "Size (in cards) of CMS parallel rescan task") \
1386 \
1387 product(uintx, CMSConcMarkMultiple, 32, \
1388 "Size (in cards) of CMS concurrent MT marking task") \
1389 \
1390 product(uintx, CMSRevisitStackSize, 1*M, \
1391 "Size of CMS KlassKlass revisit stack") \
1392 \
1393 product(bool, CMSAbortSemantics, false, \
1394 "Whether abort-on-overflow semantics is implemented") \
1395 \
1396 product(bool, CMSParallelRemarkEnabled, true, \
1397 "Whether parallel remark enabled (only if ParNewGC)") \
1398 \
1399 product(bool, CMSParallelSurvivorRemarkEnabled, true, \
1400 "Whether parallel remark of survivor space" \
1401 " enabled (effective only if CMSParallelRemarkEnabled)") \
1402 \
1403 product(bool, CMSPLABRecordAlways, true, \
1404 "Whether to always record survivor space PLAB bdries" \
1405 " (effective only if CMSParallelSurvivorRemarkEnabled)") \
1406 \
1407 product(bool, CMSConcurrentMTEnabled, true, \
1408 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
1409 \
1410 product(bool, CMSPermGenPrecleaningEnabled, true, \
1411 "Whether concurrent precleaning enabled in perm gen" \
1412 " (effective only when CMSPrecleaningEnabled is true)") \
1413 \
1414 product(bool, CMSPrecleaningEnabled, true, \
1415 "Whether concurrent precleaning enabled") \
1416 \
1417 product(uintx, CMSPrecleanIter, 3, \
1418 "Maximum number of precleaning iteration passes") \
1419 \
1420 product(uintx, CMSPrecleanNumerator, 2, \
1421 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1422 " ratio") \
1423 \
1424 product(uintx, CMSPrecleanDenominator, 3, \
1425 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
1426 " ratio") \
1427 \
1428 product(bool, CMSPrecleanRefLists1, true, \
1429 "Preclean ref lists during (initial) preclean phase") \
1430 \
1431 product(bool, CMSPrecleanRefLists2, false, \
1432 "Preclean ref lists during abortable preclean phase") \
1433 \
1434 product(bool, CMSPrecleanSurvivors1, false, \
1435 "Preclean survivors during (initial) preclean phase") \
1436 \
1437 product(bool, CMSPrecleanSurvivors2, true, \
1438 "Preclean survivors during abortable preclean phase") \
1439 \
1440 product(uintx, CMSPrecleanThreshold, 1000, \
1441 "Don't re-iterate if #dirty cards less than this") \
1442 \
1443 product(bool, CMSCleanOnEnter, true, \
1444 "Clean-on-enter optimization for reducing number of dirty cards") \
1445 \
1446 product(uintx, CMSRemarkVerifyVariant, 1, \
1447 "Choose variant (1,2) of verification following remark") \
1448 \
1449 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
1450 "If Eden used is below this value, don't try to schedule remark") \
1451 \
1452 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
1453 "The Eden occupancy % at which to try and schedule remark pause") \
1454 \
1455 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
1456 "Start sampling Eden top at least before yg occupancy reaches" \
1457 " 1/<ratio> of the size at which we plan to schedule remark") \
1458 \
1459 product(uintx, CMSSamplingGrain, 16*K, \
1460 "The minimum distance between eden samples for CMS (see above)") \
1461 \
1462 product(bool, CMSScavengeBeforeRemark, false, \
1463 "Attempt scavenge before the CMS remark step") \
1464 \
1465 develop(bool, CMSTraceSweeper, false, \
1466 "Trace some actions of the CMS sweeper") \
1467 \
1468 product(uintx, CMSWorkQueueDrainThreshold, 10, \
1469 "Don't drain below this size per parallel worker/thief") \
1470 \
1471 product(intx, CMSWaitDuration, 2000, \
1472 "Time in milliseconds that CMS thread waits for young GC") \
1473 \
1474 product(bool, CMSYield, true, \
1475 "Yield between steps of concurrent mark & sweep") \
1476 \
1477 product(uintx, CMSBitMapYieldQuantum, 10*M, \
1478 "Bitmap operations should process at most this many bits" \
1479 "between yields") \
1480 \
1481 diagnostic(bool, FLSVerifyAllHeapReferences, false, \
1482 "Verify that all refs across the FLS boundary " \
1483 " are to valid objects") \
1484 \
1485 diagnostic(bool, FLSVerifyLists, false, \
1486 "Do lots of (expensive) FreeListSpace verification") \
1487 \
1488 diagnostic(bool, FLSVerifyIndexTable, false, \
1489 "Do lots of (expensive) FLS index table verification") \
1490 \
1491 develop(bool, FLSVerifyDictionary, false, \
1492 "Do lots of (expensive) FLS dictionary verification") \
1493 \
1494 develop(bool, VerifyBlockOffsetArray, false, \
1495 "Do (expensive!) block offset array verification") \
1496 \
1497 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \
1498 "Maintain _unallocated_block in BlockOffsetArray" \
1499 " (currently applicable only to CMS collector)") \
1500 \
1501 develop(bool, TraceCMSState, false, \
1502 "Trace the state of the CMS collection") \
1503 \
1504 product(intx, RefDiscoveryPolicy, 0, \
1505 "Whether reference-based(0) or referent-based(1)") \
1506 \
1507 product(bool, ParallelRefProcEnabled, false, \
1508 "Enable parallel reference processing whenever possible") \
1509 \
1510 product(bool, ParallelRefProcBalancingEnabled, true, \
1511 "Enable balancing of reference processing queues") \
1512 \
1513 product(intx, CMSTriggerRatio, 80, \
1514 "Percentage of MinHeapFreeRatio in CMS generation that is " \
1515 " allocated before a CMS collection cycle commences") \
1516 \
1517 product(intx, CMSTriggerPermRatio, 80, \
1518 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \
1519 " is allocated before a CMS collection cycle commences, that " \
1520 " also collects the perm generation") \
1521 \
1522 product(uintx, CMSBootstrapOccupancy, 50, \
1523 "Percentage CMS generation occupancy at which to " \
1524 " initiate CMS collection for bootstrapping collection stats") \
1525 \
1526 product(intx, CMSInitiatingOccupancyFraction, -1, \
1527 "Percentage CMS generation occupancy to start a CMS collection " \
1528 " cycle (A negative value means that CMSTriggerRatio is used)") \
1529 \
1530 product(intx, CMSInitiatingPermOccupancyFraction, -1, \
1531 "Percentage CMS perm generation occupancy to start a CMScollection"\
1532 " cycle (A negative value means that CMSTriggerPermRatio is used)")\
1533 \
1534 product(bool, UseCMSInitiatingOccupancyOnly, false, \
1535 "Only use occupancy as a crierion for starting a CMS collection") \
1536 \
1537 product(intx, CMSIsTooFullPercentage, 98, \
1538 "An absolute ceiling above which CMS will always consider the" \
1539 " perm gen ripe for collection") \
1540 \
1541 develop(bool, CMSTestInFreeList, false, \
1542 "Check if the coalesced range is already in the " \
1543 "free lists as claimed.") \
1544 \
1545 notproduct(bool, CMSVerifyReturnedBytes, false, \
1546 "Check that all the garbage collected was returned to the " \
1547 "free lists.") \
1548 \
1549 notproduct(bool, ScavengeALot, false, \
1550 "Force scavenge at every Nth exit from the runtime system " \
1551 "(N=ScavengeALotInterval)") \
1552 \
1553 develop(bool, FullGCALot, false, \
1554 "Force full gc at every Nth exit from the runtime system " \
1555 "(N=FullGCALotInterval)") \
1556 \
1557 notproduct(bool, GCALotAtAllSafepoints, false, \
1558 "Enforce ScavengeALot/GCALot at all potential safepoints") \
1559 \
1560 product(bool, HandlePromotionFailure, true, \
1561 "The youngest generation collection does not require" \
1562 " a guarantee of full promotion of all live objects.") \
1563 \
1564 notproduct(bool, PromotionFailureALot, false, \
1565 "Use promotion failure handling on every youngest generation " \
1566 "collection") \
1567 \
1568 develop(uintx, PromotionFailureALotCount, 1000, \
1569 "Number of promotion failures occurring at ParGCAllocBuffer" \
1570 "refill attempts (ParNew) or promotion attempts " \
1571 "(other young collectors) ") \
1572 \
1573 develop(uintx, PromotionFailureALotInterval, 5, \
1574 "Total collections between promotion failures alot") \
1575 \
1576 develop(intx, WorkStealingSleepMillis, 1, \
1577 "Sleep time when sleep is used for yields") \
1578 \
1579 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \
1580 "Number of yields before a sleep is done during workstealing") \
1581 \
1582 product(uintx, PreserveMarkStackSize, 40, \
1583 "Size for stack used in promotion failure handling") \
1584 \
1585 product_pd(bool, UseTLAB, "Use thread-local object allocation") \
1586 \
1587 product_pd(bool, ResizeTLAB, \
1588 "Dynamically resize tlab size for threads") \
1589 \
1590 product(bool, ZeroTLAB, false, \
1591 "Zero out the newly created TLAB") \
1592 \
1593 product(bool, PrintTLAB, false, \
1594 "Print various TLAB related information") \
1595 \
1596 product(bool, TLABStats, true, \
1597 "Print various TLAB related information") \
1598 \
1599 product_pd(bool, NeverActAsServerClassMachine, \
1600 "Never act like a server-class machine") \
1601 \
1602 product(bool, AlwaysActAsServerClassMachine, false, \
1603 "Always act like a server-class machine") \
1604 \
1605 product_pd(uintx, DefaultMaxRAM, \
1606 "Maximum real memory size for setting server class heap size") \
1607 \
1608 product(uintx, DefaultMaxRAMFraction, 4, \
1609 "Fraction (1/n) of real memory used for server class max heap") \
1610 \
1611 product(uintx, DefaultInitialRAMFraction, 64, \
1612 "Fraction (1/n) of real memory used for server class initial heap") \
1613 \
1614 product(bool, UseAutoGCSelectPolicy, false, \
1615 "Use automatic collection selection policy") \
1616 \
1617 product(uintx, AutoGCSelectPauseMillis, 5000, \
1618 "Automatic GC selection pause threshhold in ms") \
1619 \
1620 product(bool, UseAdaptiveSizePolicy, true, \
1621 "Use adaptive generation sizing policies") \
1622 \
1623 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \
1624 "Use adaptive survivor sizing policies") \
1625 \
1626 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \
1627 "Use adaptive young-old sizing policies at minor collections") \
1628 \
1629 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \
1630 "Use adaptive young-old sizing policies at major collections") \
1631 \
1632 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
1633 "Use statistics from System.GC for adaptive size policy") \
1634 \
1635 product(bool, UseAdaptiveGCBoundary, false, \
1636 "Allow young-old boundary to move") \
1637 \
1638 develop(bool, TraceAdaptiveGCBoundary, false, \
1639 "Trace young-old boundary moves") \
1640 \
1641 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \
1642 "Resize the virtual spaces of the young or old generations") \
1643 \
1644 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
1645 "Policy for changeing generation size for throughput goals") \
1646 \
1647 product(uintx, AdaptiveSizePausePolicy, 0, \
1648 "Policy for changing generation size for pause goals") \
1649 \
1650 develop(bool, PSAdjustTenuredGenForMinorPause, false, \
1651 "Adjust tenured generation to achive a minor pause goal") \
1652 \
1653 develop(bool, PSAdjustYoungGenForMajorPause, false, \
1654 "Adjust young generation to achive a major pause goal") \
1655 \
1656 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
1657 "Number of steps where heuristics is used before data is used") \
1658 \
1659 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
1660 "Number of collections before the adaptive sizing is started") \
1661 \
1662 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
1663 "Collecton interval for printing information, zero => never") \
1664 \
1665 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
1666 "Use adaptive minimum footprint as a goal") \
1667 \
1668 product(uintx, AdaptiveSizePolicyWeight, 10, \
1669 "Weight given to exponential resizing, between 0 and 100") \
1670 \
1671 product(uintx, AdaptiveTimeWeight, 25, \
1672 "Weight given to time in adaptive policy, between 0 and 100") \
1673 \
1674 product(uintx, PausePadding, 1, \
1675 "How much buffer to keep for pause time") \
1676 \
1677 product(uintx, PromotedPadding, 3, \
1678 "How much buffer to keep for promotion failure") \
1679 \
1680 product(uintx, SurvivorPadding, 3, \
1681 "How much buffer to keep for survivor overflow") \
1682 \
1683 product(uintx, AdaptivePermSizeWeight, 20, \
1684 "Weight for perm gen exponential resizing, between 0 and 100") \
1685 \
1686 product(uintx, PermGenPadding, 3, \
1687 "How much buffer to keep for perm gen sizing") \
1688 \
1689 product(uintx, ThresholdTolerance, 10, \
1690 "Allowed collection cost difference between generations") \
1691 \
1692 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
1693 "If collection costs are within margin, reduce both by full delta") \
1694 \
1695 product(uintx, YoungGenerationSizeIncrement, 20, \
1696 "Adaptive size percentage change in young generation") \
1697 \
1698 product(uintx, YoungGenerationSizeSupplement, 80, \
1699 "Supplement to YoungedGenerationSizeIncrement used at startup") \
1700 \
1701 product(uintx, YoungGenerationSizeSupplementDecay, 8, \
1702 "Decay factor to YoungedGenerationSizeSupplement") \
1703 \
1704 product(uintx, TenuredGenerationSizeIncrement, 20, \
1705 "Adaptive size percentage change in tenured generation") \
1706 \
1707 product(uintx, TenuredGenerationSizeSupplement, 80, \
1708 "Supplement to TenuredGenerationSizeIncrement used at startup") \
1709 \
1710 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \
1711 "Decay factor to TenuredGenerationSizeIncrement") \
1712 \
1713 product(uintx, MaxGCPauseMillis, max_uintx, \
1714 "Adaptive size policy maximum GC pause time goal in msec") \
1715 \
1716 product(uintx, MaxGCMinorPauseMillis, max_uintx, \
1717 "Adaptive size policy maximum GC minor pause time goal in msec") \
1718 \
1719 product(uintx, GCTimeRatio, 99, \
1720 "Adaptive size policy application time to GC time ratio") \
1721 \
1722 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
1723 "Adaptive size scale down factor for shrinking") \
1724 \
1725 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \
1726 "Adaptive size decays the major cost for long major intervals") \
1727 \
1728 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
1729 "Time scale over which major costs decay") \
1730 \
1731 product(uintx, MinSurvivorRatio, 3, \
1732 "Minimum ratio of young generation/survivor space size") \
1733 \
1734 product(uintx, InitialSurvivorRatio, 8, \
1735 "Initial ratio of eden/survivor space size") \
1736 \
1737 product(uintx, BaseFootPrintEstimate, 256*M, \
1738 "Estimate of footprint other than Java Heap") \
1739 \
1740 product(bool, UseGCOverheadLimit, true, \
1741 "Use policy to limit of proportion of time spent in GC " \
1742 "before an OutOfMemory error is thrown") \
1743 \
1744 product(uintx, GCTimeLimit, 98, \
1745 "Limit of proportion of time spent in GC before an OutOfMemory" \
1746 "error is thrown (used with GCHeapFreeLimit)") \
1747 \
1748 product(uintx, GCHeapFreeLimit, 2, \
1749 "Minimum percentage of free space after a full GC before an " \
1750 "OutOfMemoryError is thrown (used with GCTimeLimit)") \
1751 \
1752 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \
1753 "Number of consecutive collections before gc time limit fires") \
1754 \
1755 product(bool, PrintAdaptiveSizePolicy, false, \
1756 "Print information about AdaptiveSizePolicy") \
1757 \
1758 product(intx, PrefetchCopyIntervalInBytes, -1, \
1759 "How far ahead to prefetch destination area (<= 0 means off)") \
1760 \
1761 product(intx, PrefetchScanIntervalInBytes, -1, \
1762 "How far ahead to prefetch scan area (<= 0 means off)") \
1763 \
1764 product(intx, PrefetchFieldsAhead, -1, \
1765 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
1766 \
1767 develop(bool, UsePrefetchQueue, true, \
1768 "Use the prefetch queue during PS promotion") \
1769 \
1770 diagnostic(bool, VerifyBeforeExit, trueInDebug, \
1771 "Verify system before exiting") \
1772 \
1773 diagnostic(bool, VerifyBeforeGC, false, \
1774 "Verify memory system before GC") \
1775 \
1776 diagnostic(bool, VerifyAfterGC, false, \
1777 "Verify memory system after GC") \
1778 \
1779 diagnostic(bool, VerifyDuringGC, false, \
1780 "Verify memory system during GC (between phases)") \
1781 \
1782 diagnostic(bool, VerifyRememberedSets, false, \
1783 "Verify GC remembered sets") \
1784 \
1785 diagnostic(bool, VerifyObjectStartArray, true, \
1786 "Verify GC object start array if verify before/after") \
1787 \
1788 product(bool, DisableExplicitGC, false, \
1789 "Tells whether calling System.gc() does a full GC") \
1790 \
1791 notproduct(bool, CheckMemoryInitialization, false, \
1792 "Checks memory initialization") \
1793 \
1794 product(bool, CollectGen0First, false, \
1795 "Collect youngest generation before each full GC") \
1796 \
1797 diagnostic(bool, BindCMSThreadToCPU, false, \
1798 "Bind CMS Thread to CPU if possible") \
1799 \
1800 diagnostic(uintx, CPUForCMSThread, 0, \
1801 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
1802 \
1803 product(bool, BindGCTaskThreadsToCPUs, false, \
1804 "Bind GCTaskThreads to CPUs if possible") \
1805 \
1806 product(bool, UseGCTaskAffinity, false, \
1807 "Use worker affinity when asking for GCTasks") \
1808 \
1809 product(uintx, ProcessDistributionStride, 4, \
1810 "Stride through processors when distributing processes") \
1811 \
1812 product(uintx, CMSCoordinatorYieldSleepCount, 10, \
1813 "number of times the coordinator GC thread will sleep while " \
1814 "yielding before giving up and resuming GC") \
1815 \
1816 product(uintx, CMSYieldSleepCount, 0, \
1817 "number of times a GC thread (minus the coordinator) " \
1818 "will sleep while yielding before giving up and resuming GC") \
1819 \
1820 notproduct(bool, PrintFlagsFinal, false, \
1821 "Print all command line flags after argument processing") \
1822 \
1823 /* gc tracing */ \
1824 manageable(bool, PrintGC, false, \
1825 "Print message at garbage collect") \
1826 \
1827 manageable(bool, PrintGCDetails, false, \
1828 "Print more details at garbage collect") \
1829 \
1830 manageable(bool, PrintGCDateStamps, false, \
1831 "Print date stamps at garbage collect") \
1832 \
1833 manageable(bool, PrintGCTimeStamps, false, \
1834 "Print timestamps at garbage collect") \
1835 \
1836 product(bool, PrintGCTaskTimeStamps, false, \
1837 "Print timestamps for individual gc worker thread tasks") \
1838 \
1839 develop(intx, ConcGCYieldTimeout, 0, \
1840 "If non-zero, assert that GC threads yield within this # of ms.") \
1841 \
1842 notproduct(bool, TraceMarkSweep, false, \
1843 "Trace mark sweep") \
1844 \
1845 product(bool, PrintReferenceGC, false, \
1846 "Print times spent handling reference objects during GC " \
1847 " (enabled only when PrintGCDetails)") \
1848 \
1849 develop(bool, TraceReferenceGC, false, \
1850 "Trace handling of soft/weak/final/phantom references") \
1851 \
1852 develop(bool, TraceFinalizerRegistration, false, \
1853 "Trace registration of final references") \
1854 \
1855 notproduct(bool, TraceScavenge, false, \
1856 "Trace scavenge") \
1857 \
1858 product_rw(bool, TraceClassLoading, false, \
1859 "Trace all classes loaded") \
1860 \
1861 product(bool, TraceClassLoadingPreorder, false, \
1862 "Trace all classes loaded in order referenced (not loaded)") \
1863 \
1864 product_rw(bool, TraceClassUnloading, false, \
1865 "Trace unloading of classes") \
1866 \
1867 product_rw(bool, TraceLoaderConstraints, false, \
1868 "Trace loader constraints") \
1869 \
1870 product(bool, TraceGen0Time, false, \
1871 "Trace accumulated time for Gen 0 collection") \
1872 \
1873 product(bool, TraceGen1Time, false, \
1874 "Trace accumulated time for Gen 1 collection") \
1875 \
1876 product(bool, PrintTenuringDistribution, false, \
1877 "Print tenuring age information") \
1878 \
1879 product_rw(bool, PrintHeapAtGC, false, \
1880 "Print heap layout before and after each GC") \
1881 \
1882 product(bool, PrintHeapAtSIGBREAK, true, \
1883 "Print heap layout in response to SIGBREAK") \
1884 \
1885 manageable(bool, PrintClassHistogram, false, \
1886 "Print a histogram of class instances") \
1887 \
1888 develop(bool, TraceWorkGang, false, \
1889 "Trace activities of work gangs") \
1890 \
1891 product(bool, TraceParallelOldGCTasks, false, \
1892 "Trace multithreaded GC activity") \
1893 \
1894 develop(bool, TraceBlockOffsetTable, false, \
1895 "Print BlockOffsetTable maps") \
1896 \
1897 develop(bool, TraceCardTableModRefBS, false, \
1898 "Print CardTableModRefBS maps") \
1899 \
1900 develop(bool, TraceGCTaskManager, false, \
1901 "Trace actions of the GC task manager") \
1902 \
1903 develop(bool, TraceGCTaskQueue, false, \
1904 "Trace actions of the GC task queues") \
1905 \
1906 develop(bool, TraceGCTaskThread, false, \
1907 "Trace actions of the GC task threads") \
1908 \
1909 product(bool, PrintParallelOldGCPhaseTimes, false, \
1910 "Print the time taken by each parallel old gc phase." \
1911 "PrintGCDetails must also be enabled.") \
1912 \
1913 develop(bool, TraceParallelOldGCMarkingPhase, false, \
1914 "Trace parallel old gc marking phase") \
1915 \
1916 develop(bool, TraceParallelOldGCSummaryPhase, false, \
1917 "Trace parallel old gc summary phase") \
1918 \
1919 develop(bool, TraceParallelOldGCCompactionPhase, false, \
1920 "Trace parallel old gc compaction phase") \
1921 \
1922 develop(bool, TraceParallelOldGCDensePrefix, false, \
1923 "Trace parallel old gc dense prefix computation") \
1924 \
1925 develop(bool, IgnoreLibthreadGPFault, false, \
1926 "Suppress workaround for libthread GP fault") \
1927 \
1928 /* JVMTI heap profiling */ \
1929 \
1930 diagnostic(bool, TraceJVMTIObjectTagging, false, \
1931 "Trace JVMTI object tagging calls") \
1932 \
1933 diagnostic(bool, VerifyBeforeIteration, false, \
1934 "Verify memory system before JVMTI iteration") \
1935 \
1936 /* compiler interface */ \
1937 \
1938 develop(bool, CIPrintCompilerName, false, \
1939 "when CIPrint is active, print the name of the active compiler") \
1940 \
1941 develop(bool, CIPrintCompileQueue, false, \
1942 "display the contents of the compile queue whenever a " \
1943 "compilation is enqueued") \
1944 \
1945 develop(bool, CIPrintRequests, false, \
1946 "display every request for compilation") \
1947 \
1948 product(bool, CITime, false, \
1949 "collect timing information for compilation") \
1950 \
1951 develop(bool, CITimeEach, false, \
1952 "display timing information after each successful compilation") \
1953 \
1954 develop(bool, CICountOSR, true, \
1955 "use a separate counter when assigning ids to osr compilations") \
1956 \
1957 develop(bool, CICompileNatives, true, \
1958 "compile native methods if supported by the compiler") \
1959 \
1960 develop_pd(bool, CICompileOSR, \
1961 "compile on stack replacement methods if supported by the " \
1962 "compiler") \
1963 \
1964 develop(bool, CIPrintMethodCodes, false, \
1965 "print method bytecodes of the compiled code") \
1966 \
1967 develop(bool, CIPrintTypeFlow, false, \
1968 "print the results of ciTypeFlow analysis") \
1969 \
1970 develop(bool, CITraceTypeFlow, false, \
1971 "detailed per-bytecode tracing of ciTypeFlow analysis") \
1972 \
1973 develop(intx, CICloneLoopTestLimit, 100, \
1974 "size limit for blocks heuristically cloned in ciTypeFlow") \
1975 \
1976 /* temp diagnostics */ \
1977 \
1978 diagnostic(bool, TraceRedundantCompiles, false, \
1979 "Have compile broker print when a request already in the queue is"\
1980 " requested again") \
1981 \
1982 diagnostic(bool, InitialCompileFast, false, \
1983 "Initial compile at CompLevel_fast_compile") \
1984 \
1985 diagnostic(bool, InitialCompileReallyFast, false, \
1986 "Initial compile at CompLevel_really_fast_compile (no profile)") \
1987 \
1988 diagnostic(bool, FullProfileOnReInterpret, true, \
1989 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\
1990 \
1991 /* compiler */ \
1992 \
1993 product(intx, CICompilerCount, CI_COMPILER_COUNT, \
1994 "Number of compiler threads to run") \
1995 \
1996 product(intx, CompilationPolicyChoice, 0, \
1997 "which compilation policy (0/1)") \
1998 \
1999 develop(bool, UseStackBanging, true, \
2000 "use stack banging for stack overflow checks (required for " \
2001 "proper StackOverflow handling; disable only to measure cost " \
2002 "of stackbanging)") \
2003 \
2004 develop(bool, Use24BitFPMode, true, \
2005 "Set 24-bit FPU mode on a per-compile basis ") \
2006 \
2007 develop(bool, Use24BitFP, true, \
2008 "use FP instructions that produce 24-bit precise results") \
2009 \
2010 develop(bool, UseStrictFP, true, \
2011 "use strict fp if modifier strictfp is set") \
2012 \
2013 develop(bool, GenerateSynchronizationCode, true, \
2014 "generate locking/unlocking code for synchronized methods and " \
2015 "monitors") \
2016 \
2017 develop(bool, GenerateCompilerNullChecks, true, \
2018 "Generate explicit null checks for loads/stores/calls") \
2019 \
2020 develop(bool, GenerateRangeChecks, true, \
2021 "Generate range checks for array accesses") \
2022 \
2023 develop_pd(bool, ImplicitNullChecks, \
2024 "generate code for implicit null checks") \
2025 \
2026 product(bool, PrintSafepointStatistics, false, \
2027 "print statistics about safepoint synchronization") \
2028 \
2029 product(intx, PrintSafepointStatisticsCount, 300, \
2030 "total number of safepoint statistics collected " \
2031 "before printing them out") \
2032 \
2033 product(intx, PrintSafepointStatisticsTimeout, -1, \
2034 "print safepoint statistics only when safepoint takes" \
2035 " more than PrintSafepointSatisticsTimeout in millis") \
2036 \
2037 develop(bool, InlineAccessors, true, \
2038 "inline accessor methods (get/set)") \
2039 \
2040 product(bool, Inline, true, \
2041 "enable inlining") \
2042 \
2043 product(bool, ClipInlining, true, \
2044 "clip inlining if aggregate method exceeds DesiredMethodLimit") \
2045 \
2046 develop(bool, UseCHA, true, \
2047 "enable CHA") \
2048 \
2049 product(bool, UseTypeProfile, true, \
2050 "Check interpreter profile for historically monomorphic calls") \
2051 \
2052 product(intx, TypeProfileMajorReceiverPercent, 90, \
2053 "% of major receiver type to all profiled receivers") \
2054 \
2055 notproduct(bool, TimeCompiler, false, \
2056 "time the compiler") \
2057 \
2058 notproduct(bool, TimeCompiler2, false, \
2059 "detailed time the compiler (requires +TimeCompiler)") \
2060 \
2061 diagnostic(bool, PrintInlining, false, \
2062 "prints inlining optimizations") \
2063 \
2064 diagnostic(bool, PrintIntrinsics, false, \
2065 "prints attempted and successful inlining of intrinsics") \
2066 \
2067 diagnostic(ccstrlist, DisableIntrinsic, "", \
2068 "do not expand intrinsics whose (internal) names appear here") \
2069 \
2070 develop(bool, StressReflectiveCode, false, \
2071 "Use inexact types at allocations, etc., to test reflection") \
2072 \
2073 develop(bool, EagerInitialization, false, \
2074 "Eagerly initialize classes if possible") \
2075 \
2076 product(bool, Tier1UpdateMethodData, trueInTiered, \
2077 "Update methodDataOops in Tier1-generated code") \
2078 \
2079 develop(bool, TraceMethodReplacement, false, \
2080 "Print when methods are replaced do to recompilation") \
2081 \
2082 develop(bool, PrintMethodFlushing, false, \
2083 "print the nmethods being flushed") \
2084 \
2085 notproduct(bool, LogMultipleMutexLocking, false, \
2086 "log locking and unlocking of mutexes (only if multiple locks " \
2087 "are held)") \
2088 \
2089 develop(bool, UseRelocIndex, false, \
2090 "use an index to speed random access to relocations") \
2091 \
2092 develop(bool, StressCodeBuffers, false, \
2093 "Exercise code buffer expansion and other rare state changes") \
2094 \
2095 diagnostic(bool, DebugNonSafepoints, trueInDebug, \
2096 "Generate extra debugging info for non-safepoints in nmethods") \
2097 \
2098 diagnostic(bool, DebugInlinedCalls, true, \
2099 "If false, restricts profiled locations to the root method only") \
2100 \
2101 product(bool, PrintVMOptions, trueInDebug, \
2102 "print VM flag settings") \
2103 \
2104 diagnostic(bool, SerializeVMOutput, true, \
2105 "Use a mutex to serialize output to tty and hotspot.log") \
2106 \
2107 diagnostic(bool, DisplayVMOutput, true, \
2108 "Display all VM output on the tty, independently of LogVMOutput") \
2109 \
2110 diagnostic(bool, LogVMOutput, trueInDebug, \
2111 "Save VM output to hotspot.log, or to LogFile") \
2112 \
2113 diagnostic(ccstr, LogFile, NULL, \
2114 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2115 \
2116 product(ccstr, ErrorFile, NULL, \
2117 "If an error occurs, save the error data to this file " \
2118 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
2119 \
2120 product(bool, DisplayVMOutputToStderr, false, \
2121 "If DisplayVMOutput is true, display all VM output to stderr") \
2122 \
2123 product(bool, DisplayVMOutputToStdout, false, \
2124 "If DisplayVMOutput is true, display all VM output to stdout") \
2125 \
2126 product(bool, UseHeavyMonitors, false, \
2127 "use heavyweight instead of lightweight Java monitors") \
2128 \
2129 notproduct(bool, PrintSymbolTableSizeHistogram, false, \
2130 "print histogram of the symbol table") \
2131 \
2132 notproduct(bool, ExitVMOnVerifyError, false, \
2133 "standard exit from VM if bytecode verify error " \
2134 "(only in debug mode)") \
2135 \
2136 notproduct(ccstr, AbortVMOnException, NULL, \
2137 "Call fatal if this exception is thrown. Example: " \
2138 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2139 \
2140 develop(bool, DebugVtables, false, \
2141 "add debugging code to vtable dispatch") \
2142 \
2143 develop(bool, PrintVtables, false, \
2144 "print vtables when printing klass") \
2145 \
2146 notproduct(bool, PrintVtableStats, false, \
2147 "print vtables stats at end of run") \
2148 \
2149 develop(bool, TraceCreateZombies, false, \
2150 "trace creation of zombie nmethods") \
2151 \
2152 notproduct(bool, IgnoreLockingAssertions, false, \
2153 "disable locking assertions (for speed)") \
2154 \
2155 notproduct(bool, VerifyLoopOptimizations, false, \
2156 "verify major loop optimizations") \
2157 \
2158 product(bool, RangeCheckElimination, true, \
2159 "Split loop iterations to eliminate range checks") \
2160 \
2161 develop_pd(bool, UncommonNullCast, \
2162 "track occurrences of null in casts; adjust compiler tactics") \
2163 \
2164 develop(bool, TypeProfileCasts, true, \
2165 "treat casts like calls for purposes of type profiling") \
2166 \
2167 develop(bool, MonomorphicArrayCheck, true, \
2168 "Uncommon-trap array store checks that require full type check") \
2169 \
2170 develop(bool, DelayCompilationDuringStartup, true, \
2171 "Delay invoking the compiler until main application class is " \
2172 "loaded") \
2173 \
2174 develop(bool, CompileTheWorld, false, \
2175 "Compile all methods in all classes in bootstrap class path " \
2176 "(stress test)") \
2177 \
2178 develop(bool, CompileTheWorldPreloadClasses, true, \
2179 "Preload all classes used by a class before start loading") \
2180 \
2181 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \
2182 "Compile all methods although class initializer failed") \
2183 \
2184 develop(bool, TraceIterativeGVN, false, \
2185 "Print progress during Iterative Global Value Numbering") \
2186 \
2187 develop(bool, FillDelaySlots, true, \
2188 "Fill delay slots (on SPARC only)") \
2189 \
2190 develop(bool, VerifyIterativeGVN, false, \
2191 "Verify Def-Use modifications during sparse Iterative Global " \
2192 "Value Numbering") \
2193 \
2194 notproduct(bool, TracePhaseCCP, false, \
2195 "Print progress during Conditional Constant Propagation") \
2196 \
2197 develop(bool, TimeLivenessAnalysis, false, \
2198 "Time computation of bytecode liveness analysis") \
2199 \
2200 develop(bool, TraceLivenessGen, false, \
2201 "Trace the generation of liveness analysis information") \
2202 \
2203 notproduct(bool, TraceLivenessQuery, false, \
2204 "Trace queries of liveness analysis information") \
2205 \
2206 notproduct(bool, CollectIndexSetStatistics, false, \
2207 "Collect information about IndexSets") \
2208 \
2209 develop(bool, PrintDominators, false, \
2210 "Print out dominator trees for GVN") \
2211 \
2212 develop(bool, UseLoopSafepoints, true, \
2213 "Generate Safepoint nodes in every loop") \
2214 \
2215 notproduct(bool, TraceCISCSpill, false, \
2216 "Trace allocators use of cisc spillable instructions") \
2217 \
2218 notproduct(bool, TraceSpilling, false, \
2219 "Trace spilling") \
2220 \
2221 develop(bool, DeutschShiffmanExceptions, true, \
2222 "Fast check to find exception handler for precisely typed " \
2223 "exceptions") \
2224 \
2225 product(bool, SplitIfBlocks, true, \
2226 "Clone compares and control flow through merge points to fold " \
2227 "some branches") \
2228 \
2229 develop(intx, FastAllocateSizeLimit, 128*K, \
2230 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \
2231 "Inline allocations larger than this in doublewords must go slow")\
2232 \
2233 product(bool, AggressiveOpts, false, \
2234 "Enable aggressive optimizations - see arguments.cpp") \
2235 \
2236 /* statistics */ \
2237 develop(bool, UseVTune, false, \
2238 "enable support for Intel's VTune profiler") \
2239 \
2240 develop(bool, CountCompiledCalls, false, \
2241 "counts method invocations") \
2242 \
2243 notproduct(bool, CountRuntimeCalls, false, \
2244 "counts VM runtime calls") \
2245 \
2246 develop(bool, CountJNICalls, false, \
2247 "counts jni method invocations") \
2248 \
2249 notproduct(bool, CountJVMCalls, false, \
2250 "counts jvm method invocations") \
2251 \
2252 notproduct(bool, CountRemovableExceptions, false, \
2253 "count exceptions that could be replaced by branches due to " \
2254 "inlining") \
2255 \
2256 notproduct(bool, ICMissHistogram, false, \
2257 "produce histogram of IC misses") \
2258 \
2259 notproduct(bool, PrintClassStatistics, false, \
2260 "prints class statistics at end of run") \
2261 \
2262 notproduct(bool, PrintMethodStatistics, false, \
2263 "prints method statistics at end of run") \
2264 \
2265 /* interpreter */ \
2266 develop(bool, ClearInterpreterLocals, false, \
2267 "Always clear local variables of interpreter activations upon " \
2268 "entry") \
2269 \
2270 product_pd(bool, RewriteBytecodes, \
2271 "Allow rewriting of bytecodes (bytecodes are not immutable)") \
2272 \
2273 product_pd(bool, RewriteFrequentPairs, \
2274 "Rewrite frequently used bytecode pairs into a single bytecode") \
2275 \
2276 diagnostic(bool, PrintInterpreter, false, \
2277 "Prints the generated interpreter code") \
2278 \
2279 product(bool, UseInterpreter, true, \
2280 "Use interpreter for non-compiled methods") \
2281 \
2282 develop(bool, UseFastSignatureHandlers, true, \
2283 "Use fast signature handlers for native calls") \
2284 \
2285 develop(bool, UseV8InstrsOnly, false, \
2286 "Use SPARC-V8 Compliant instruction subset") \
2287 \
2288 product(bool, UseNiagaraInstrs, false, \
2289 "Use Niagara-efficient instruction subset") \
2290 \
2291 develop(bool, UseCASForSwap, false, \
2292 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
2293 \
2294 product(bool, UseLoopCounter, true, \
2295 "Increment invocation counter on backward branch") \
2296 \
2297 product(bool, UseFastEmptyMethods, true, \
2298 "Use fast method entry code for empty methods") \
2299 \
2300 product(bool, UseFastAccessorMethods, true, \
2301 "Use fast method entry code for accessor methods") \
2302 \
2303 product_pd(bool, UseOnStackReplacement, \
2304 "Use on stack replacement, calls runtime if invoc. counter " \
2305 "overflows in loop") \
2306 \
2307 notproduct(bool, TraceOnStackReplacement, false, \
2308 "Trace on stack replacement") \
2309 \
2310 develop(bool, PoisonOSREntry, true, \
2311 "Detect abnormal calls to OSR code") \
2312 \
2313 product_pd(bool, PreferInterpreterNativeStubs, \
2314 "Use always interpreter stubs for native methods invoked via " \
2315 "interpreter") \
2316 \
2317 develop(bool, CountBytecodes, false, \
2318 "Count number of bytecodes executed") \
2319 \
2320 develop(bool, PrintBytecodeHistogram, false, \
2321 "Print histogram of the executed bytecodes") \
2322 \
2323 develop(bool, PrintBytecodePairHistogram, false, \
2324 "Print histogram of the executed bytecode pairs") \
2325 \
2326 diagnostic(bool, PrintSignatureHandlers, false, \
2327 "Print code generated for native method signature handlers") \
2328 \
2329 develop(bool, VerifyOops, false, \
2330 "Do plausibility checks for oops") \
2331 \
2332 develop(bool, CheckUnhandledOops, false, \
2333 "Check for unhandled oops in VM code") \
2334 \
2335 develop(bool, VerifyJNIFields, trueInDebug, \
2336 "Verify jfieldIDs for instance fields") \
2337 \
2338 notproduct(bool, VerifyJNIEnvThread, false, \
2339 "Verify JNIEnv.thread == Thread::current() when entering VM " \
2340 "from JNI") \
2341 \
2342 develop(bool, VerifyFPU, false, \
2343 "Verify FPU state (check for NaN's, etc.)") \
2344 \
2345 develop(bool, VerifyThread, false, \
2346 "Watch the thread register for corruption (SPARC only)") \
2347 \
2348 develop(bool, VerifyActivationFrameSize, false, \
2349 "Verify that activation frame didn't become smaller than its " \
2350 "minimal size") \
2351 \
2352 develop(bool, TraceFrequencyInlining, false, \
2353 "Trace frequency based inlining") \
2354 \
2355 notproduct(bool, TraceTypeProfile, false, \
2356 "Trace type profile") \
2357 \
2358 develop_pd(bool, InlineIntrinsics, \
2359 "Inline intrinsics that can be statically resolved") \
2360 \
2361 product_pd(bool, ProfileInterpreter, \
2362 "Profile at the bytecode level during interpretation") \
2363 \
2364 develop_pd(bool, ProfileTraps, \
2365 "Profile deoptimization traps at the bytecode level") \
2366 \
2367 product(intx, ProfileMaturityPercentage, 20, \
2368 "number of method invocations/branches (expressed as % of " \
2369 "CompileThreshold) before using the method's profile") \
2370 \
2371 develop(bool, PrintMethodData, false, \
2372 "Print the results of +ProfileInterpreter at end of run") \
2373 \
2374 develop(bool, VerifyDataPointer, trueInDebug, \
2375 "Verify the method data pointer during interpreter profiling") \
2376 \
2377 develop(bool, VerifyCompiledCode, false, \
2378 "Include miscellaneous runtime verifications in nmethod code; " \
2379 "off by default because it disturbs nmethod size heuristics.") \
2380 \
2381 \
2382 /* compilation */ \
2383 product(bool, UseCompiler, true, \
2384 "use compilation") \
2385 \
2386 develop(bool, TraceCompilationPolicy, false, \
2387 "Trace compilation policy") \
2388 \
2389 develop(bool, TimeCompilationPolicy, false, \
2390 "Time the compilation policy") \
2391 \
2392 product(bool, UseCounterDecay, true, \
2393 "adjust recompilation counters") \
2394 \
2395 develop(intx, CounterHalfLifeTime, 30, \
2396 "half-life time of invocation counters (in secs)") \
2397 \
2398 develop(intx, CounterDecayMinIntervalLength, 500, \
2399 "Min. ms. between invocation of CounterDecay") \
2400 \
2401 product(bool, AlwaysCompileLoopMethods, false, \
2402 "when using recompilation, never interpret methods " \
2403 "containing loops") \
2404 \
2405 product(bool, DontCompileHugeMethods, true, \
2406 "don't compile methods > HugeMethodLimit") \
2407 \
2408 /* Bytecode escape analysis estimation. */ \
2409 product(bool, EstimateArgEscape, true, \
2410 "Analyze bytecodes to estimate escape state of arguments") \
2411 \
2412 product(intx, BCEATraceLevel, 0, \
2413 "How much tracing to do of bytecode escape analysis estimates") \
2414 \
2415 product(intx, MaxBCEAEstimateLevel, 5, \
2416 "Maximum number of nested calls that are analyzed by BC EA.") \
2417 \
2418 product(intx, MaxBCEAEstimateSize, 150, \
2419 "Maximum bytecode size of a method to be analyzed by BC EA.") \
2420 \
2421 product(intx, AllocatePrefetchStyle, 1, \
2422 "0 = no prefetch, " \
2423 "1 = prefetch instructions for each allocation, " \
2424 "2 = use TLAB watermark to gate allocation prefetch") \
2425 \
2426 product(intx, AllocatePrefetchDistance, -1, \
2427 "Distance to prefetch ahead of allocation pointer") \
2428 \
2429 product(intx, AllocatePrefetchLines, 1, \
2430 "Number of lines to prefetch ahead of allocation pointer") \
2431 \
2432 product(intx, AllocatePrefetchStepSize, 16, \
2433 "Step size in bytes of sequential prefetch instructions") \
2434 \
2435 product(intx, AllocatePrefetchInstr, 0, \
2436 "Prefetch instruction to prefetch ahead of allocation pointer") \
2437 \
2438 product(intx, ReadPrefetchInstr, 0, \
2439 "Prefetch instruction to prefetch ahead") \
2440 \
2441 /* deoptimization */ \
2442 develop(bool, TraceDeoptimization, false, \
2443 "Trace deoptimization") \
2444 \
2445 develop(bool, DebugDeoptimization, false, \
2446 "Tracing various information while debugging deoptimization") \
2447 \
2448 product(intx, SelfDestructTimer, 0, \
2449 "Will cause VM to terminate after a given time (in minutes) " \
2450 "(0 means off)") \
2451 \
2452 product(intx, MaxJavaStackTraceDepth, 1024, \
2453 "Max. no. of lines in the stack trace for Java exceptions " \
2454 "(0 means all)") \
2455 \
2456 develop(intx, GuaranteedSafepointInterval, 1000, \
2457 "Guarantee a safepoint (at least) every so many milliseconds " \
2458 "(0 means none)") \
2459 \
2460 product(intx, SafepointTimeoutDelay, 10000, \
2461 "Delay in milliseconds for option SafepointTimeout") \
2462 \
2463 product(intx, NmethodSweepFraction, 4, \
2464 "Number of invocations of sweeper to cover all nmethods") \
2465 \
2466 notproduct(intx, MemProfilingInterval, 500, \
2467 "Time between each invocation of the MemProfiler") \
2468 \
2469 develop(intx, MallocCatchPtr, -1, \
2470 "Hit breakpoint when mallocing/freeing this pointer") \
2471 \
2472 notproduct(intx, AssertRepeat, 1, \
2473 "number of times to evaluate expression in assert " \
2474 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2475 \
2476 notproduct(ccstrlist, SuppressErrorAt, "", \
2477 "List of assertions (file:line) to muzzle") \
2478 \
2479 notproduct(uintx, HandleAllocationLimit, 1024, \
2480 "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2481 "is used") \
2482 \
2483 develop(uintx, TotalHandleAllocationLimit, 1024, \
2484 "Threshold for total handle allocation when " \
2485 "+TraceHandleAllocation is used") \
2486 \
2487 develop(intx, StackPrintLimit, 100, \
2488 "number of stack frames to print in VM-level stack dump") \
2489 \
2490 notproduct(intx, MaxElementPrintSize, 256, \
2491 "maximum number of elements to print") \
2492 \
2493 notproduct(intx, MaxSubklassPrintSize, 4, \
2494 "maximum number of subklasses to print when printing klass") \
2495 \
2496 develop(intx, MaxInlineLevel, 9, \
2497 "maximum number of nested calls that are inlined") \
2498 \
2499 develop(intx, MaxRecursiveInlineLevel, 1, \
2500 "maximum number of nested recursive calls that are inlined") \
2501 \
2502 develop(intx, InlineSmallCode, 1000, \
2503 "Only inline already compiled methods if their code size is " \
2504 "less than this") \
2505 \
2506 product(intx, MaxInlineSize, 35, \
2507 "maximum bytecode size of a method to be inlined") \
2508 \
2509 product_pd(intx, FreqInlineSize, \
2510 "maximum bytecode size of a frequent method to be inlined") \
2511 \
2512 develop(intx, MaxTrivialSize, 6, \
2513 "maximum bytecode size of a trivial method to be inlined") \
2514 \
2515 develop(intx, MinInliningThreshold, 250, \
2516 "min. invocation count a method needs to have to be inlined") \
2517 \
2518 develop(intx, AlignEntryCode, 4, \
2519 "aligns entry code to specified value (in bytes)") \
2520 \
2521 develop(intx, MethodHistogramCutoff, 100, \
2522 "cutoff value for method invoc. histogram (+CountCalls)") \
2523 \
2524 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
2525 "# of interpreted methods to show in profile") \
2526 \
2527 develop(intx, ProfilerNumberOfCompiledMethods, 25, \
2528 "# of compiled methods to show in profile") \
2529 \
2530 develop(intx, ProfilerNumberOfStubMethods, 25, \
2531 "# of stub methods to show in profile") \
2532 \
2533 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
2534 "# of runtime stub nodes to show in profile") \
2535 \
2536 product(intx, ProfileIntervalsTicks, 100, \
2537 "# of ticks between printing of interval profile " \
2538 "(+ProfileIntervals)") \
2539 \
2540 notproduct(intx, ScavengeALotInterval, 1, \
2541 "Interval between which scavenge will occur with +ScavengeALot") \
2542 \
2543 notproduct(intx, FullGCALotInterval, 1, \
2544 "Interval between which full gc will occur with +FullGCALot") \
2545 \
2546 notproduct(intx, FullGCALotStart, 0, \
2547 "For which invocation to start FullGCAlot") \
2548 \
2549 notproduct(intx, FullGCALotDummies, 32*K, \
2550 "Dummy object allocated with +FullGCALot, forcing all objects " \
2551 "to move") \
2552 \
2553 develop(intx, DontYieldALotInterval, 10, \
2554 "Interval between which yields will be dropped (milliseconds)") \
2555 \
2556 develop(intx, MinSleepInterval, 1, \
2557 "Minimum sleep() interval (milliseconds) when " \
2558 "ConvertSleepToYield is off (used for SOLARIS)") \
2559 \
2560 product(intx, EventLogLength, 2000, \
2561 "maximum nof events in event log") \
2562 \
2563 develop(intx, ProfilerPCTickThreshold, 15, \
2564 "Number of ticks in a PC buckets to be a hotspot") \
2565 \
2566 notproduct(intx, DeoptimizeALotInterval, 5, \
2567 "Number of exits until DeoptimizeALot kicks in") \
2568 \
2569 notproduct(intx, ZombieALotInterval, 5, \
2570 "Number of exits until ZombieALot kicks in") \
2571 \
2572 develop(bool, StressNonEntrant, false, \
2573 "Mark nmethods non-entrant at registration") \
2574 \
2575 diagnostic(intx, MallocVerifyInterval, 0, \
2576 "if non-zero, verify C heap after every N calls to " \
2577 "malloc/realloc/free") \
2578 \
2579 diagnostic(intx, MallocVerifyStart, 0, \
2580 "if non-zero, start verifying C heap after Nth call to " \
2581 "malloc/realloc/free") \
2582 \
2583 product(intx, TypeProfileWidth, 2, \
2584 "number of receiver types to record in call/cast profile") \
2585 \
2586 develop(intx, BciProfileWidth, 2, \
2587 "number of return bci's to record in ret profile") \
2588 \
2589 product(intx, PerMethodRecompilationCutoff, 400, \
2590 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
2591 \
2592 product(intx, PerBytecodeRecompilationCutoff, 100, \
2593 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \
2594 \
2595 product(intx, PerMethodTrapLimit, 100, \
2596 "Limit on traps (of one kind) in a method (includes inlines)") \
2597 \
2598 product(intx, PerBytecodeTrapLimit, 4, \
2599 "Limit on traps (of one kind) at a particular BCI") \
2600 \
2601 develop(intx, FreqCountInvocations, 1, \
2602 "Scaling factor for branch frequencies (deprecated)") \
2603 \
2604 develop(intx, InlineFrequencyRatio, 20, \
2605 "Ratio of call site execution to caller method invocation") \
2606 \
2607 develop_pd(intx, InlineFrequencyCount, \
2608 "Count of call site execution necessary to trigger frequent " \
2609 "inlining") \
2610 \
2611 develop(intx, InlineThrowCount, 50, \
2612 "Force inlining of interpreted methods that throw this often") \
2613 \
2614 develop(intx, InlineThrowMaxSize, 200, \
2615 "Force inlining of throwing methods smaller than this") \
2616 \
2617 product(intx, AliasLevel, 3, \
2618 "0 for no aliasing, 1 for oop/field/static/array split, " \
2619 "2 for class split, 3 for unique instances") \
2620 \
2621 develop(bool, VerifyAliases, false, \
2622 "perform extra checks on the results of alias analysis") \
2623 \
2624 develop(intx, ProfilerNodeSize, 1024, \
2625 "Size in K to allocate for the Profile Nodes of each thread") \
2626 \
2627 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \
2628 "Number of times to spin wait on a v8 atomic operation lock") \
2629 \
2630 product(intx, ReadSpinIterations, 100, \
2631 "Number of read attempts before a yield (spin inner loop)") \
2632 \
2633 product_pd(intx, PreInflateSpin, \
2634 "Number of times to spin wait before inflation") \
2635 \
2636 product(intx, PreBlockSpin, 10, \
2637 "Number of times to spin in an inflated lock before going to " \
2638 "an OS lock") \
2639 \
2640 /* gc parameters */ \
2641 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \
2642 "Default maximum size for object heap (in bytes)") \
2643 \
2644 product_pd(uintx, NewSize, \
2645 "Default size of new generation (in bytes)") \
2646 \
2647 product(uintx, MaxNewSize, max_uintx, \
2648 "Maximum size of new generation (in bytes)") \
2649 \
2650 product(uintx, PretenureSizeThreshold, 0, \
2651 "Max size in bytes of objects allocated in DefNew generation") \
2652 \
2653 product_pd(uintx, TLABSize, \
2654 "Default (or starting) size of TLAB (in bytes)") \
2655 \
2656 product(uintx, MinTLABSize, 2*K, \
2657 "Minimum allowed TLAB size (in bytes)") \
2658 \
2659 product(uintx, TLABAllocationWeight, 35, \
2660 "Allocation averaging weight") \
2661 \
2662 product(uintx, TLABWasteTargetPercent, 1, \
2663 "Percentage of Eden that can be wasted") \
2664 \
2665 product(uintx, TLABRefillWasteFraction, 64, \
2666 "Max TLAB waste at a refill (internal fragmentation)") \
2667 \
2668 product(uintx, TLABWasteIncrement, 4, \
2669 "Increment allowed waste at slow allocation") \
2670 \
2671 product_pd(intx, SurvivorRatio, \
2672 "Ratio of eden/survivor space size") \
2673 \
2674 product_pd(intx, NewRatio, \
2675 "Ratio of new/old generation sizes") \
2676 \
2677 product(uintx, MaxLiveObjectEvacuationRatio, 100, \
2678 "Max percent of eden objects that will be live at scavenge") \
2679 \
2680 product_pd(uintx, NewSizeThreadIncrease, \
2681 "Additional size added to desired new generation size per " \
2682 "non-daemon thread (in bytes)") \
2683 \
2684 product(uintx, OldSize, ScaleForWordSize(4096*K), \
2685 "Default size of tenured generation (in bytes)") \
2686 \
2687 product_pd(uintx, PermSize, \
2688 "Default size of permanent generation (in bytes)") \
2689 \
2690 product_pd(uintx, MaxPermSize, \
2691 "Maximum size of permanent generation (in bytes)") \
2692 \
2693 product(uintx, MinHeapFreeRatio, 40, \
2694 "Min percentage of heap free after GC to avoid expansion") \
2695 \
2696 product(uintx, MaxHeapFreeRatio, 70, \
2697 "Max percentage of heap free after GC to avoid shrinking") \
2698 \
2699 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
2700 "Number of milliseconds per MB of free space in the heap") \
2701 \
2702 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
2703 "Min change in heap space due to GC (in bytes)") \
2704 \
2705 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \
2706 "Min expansion of permanent heap (in bytes)") \
2707 \
2708 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \
2709 "Max expansion of permanent heap without full GC (in bytes)") \
2710 \
2711 product(intx, QueuedAllocationWarningCount, 0, \
2712 "Number of times an allocation that queues behind a GC " \
2713 "will retry before printing a warning") \
2714 \
2715 diagnostic(uintx, VerifyGCStartAt, 0, \
2716 "GC invoke count where +VerifyBefore/AfterGC kicks in") \
2717 \
2718 diagnostic(intx, VerifyGCLevel, 0, \
2719 "Generation level at which to start +VerifyBefore/AfterGC") \
2720 \
2721 develop(uintx, ExitAfterGCNum, 0, \
2722 "If non-zero, exit after this GC.") \
2723 \
2724 product(intx, MaxTenuringThreshold, 15, \
2725 "Maximum value for tenuring threshold") \
2726 \
2727 product(intx, InitialTenuringThreshold, 7, \
2728 "Initial value for tenuring threshold") \
2729 \
2730 product(intx, TargetSurvivorRatio, 50, \
2731 "Desired percentage of survivor space used after scavenge") \
2732 \
2733 product(intx, MarkSweepDeadRatio, 5, \
2734 "Percentage (0-100) of the old gen allowed as dead wood." \
2735 "Serial mark sweep treats this as both the min and max value." \
2736 "CMS uses this value only if it falls back to mark sweep." \
2737 "Par compact uses a variable scale based on the density of the" \
2738 "generation and treats this as the max value when the heap is" \
2739 "either completely full or completely empty. Par compact also" \
2740 "has a smaller default value; see arguments.cpp.") \
2741 \
2742 product(intx, PermMarkSweepDeadRatio, 20, \
2743 "Percentage (0-100) of the perm gen allowed as dead wood." \
2744 "See MarkSweepDeadRatio for collector-specific comments.") \
2745 \
2746 product(intx, MarkSweepAlwaysCompactCount, 4, \
2747 "How often should we fully compact the heap (ignoring the dead " \
2748 "space parameters)") \
2749 \
2750 product(intx, PrintCMSStatistics, 0, \
2751 "Statistics for CMS") \
2752 \
2753 product(bool, PrintCMSInitiationStatistics, false, \
2754 "Statistics for initiating a CMS collection") \
2755 \
2756 product(intx, PrintFLSStatistics, 0, \
2757 "Statistics for CMS' FreeListSpace") \
2758 \
2759 product(intx, PrintFLSCensus, 0, \
2760 "Census for CMS' FreeListSpace") \
2761 \
2762 develop(uintx, GCExpandToAllocateDelayMillis, 0, \
2763 "Delay in ms between expansion and allocation") \
2764 \
2765 product(intx, DeferThrSuspendLoopCount, 4000, \
2766 "(Unstable) Number of times to iterate in safepoint loop " \
2767 " before blocking VM threads ") \
2768 \
2769 product(intx, DeferPollingPageLoopCount, -1, \
2770 "(Unsafe,Unstable) Number of iterations in safepoint loop " \
2771 "before changing safepoint polling page to RO ") \
2772 \
2773 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
2774 \
2775 product(bool, UseDepthFirstScavengeOrder, true, \
2776 "true: the scavenge order will be depth-first, " \
2777 "false: the scavenge order will be breadth-first") \
2778 \
2779 product(bool, PSChunkLargeArrays, true, \
2780 "true: process large arrays in chunks") \
2781 \
2782 product(uintx, GCDrainStackTargetSize, 64, \
2783 "how many entries we'll try to leave on the stack during " \
2784 "parallel GC") \
2785 \
2786 /* stack parameters */ \
2787 product_pd(intx, StackYellowPages, \
2788 "Number of yellow zone (recoverable overflows) pages") \
2789 \
2790 product_pd(intx, StackRedPages, \
2791 "Number of red zone (unrecoverable overflows) pages") \
2792 \
2793 product_pd(intx, StackShadowPages, \
2794 "Number of shadow zone (for overflow checking) pages" \
2795 " this should exceed the depth of the VM and native call stack") \
2796 \
2797 product_pd(intx, ThreadStackSize, \
2798 "Thread Stack Size (in Kbytes)") \
2799 \
2800 product_pd(intx, VMThreadStackSize, \
2801 "Non-Java Thread Stack Size (in Kbytes)") \
2802 \
2803 product_pd(intx, CompilerThreadStackSize, \
2804 "Compiler Thread Stack Size (in Kbytes)") \
2805 \
2806 develop_pd(uintx, JVMInvokeMethodSlack, \
2807 "Stack space (bytes) required for JVM_InvokeMethod to complete") \
2808 \
2809 product(uintx, ThreadSafetyMargin, 50*M, \
2810 "Thread safety margin is used on fixed-stack LinuxThreads (on " \
2811 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \
2812 "disable this feature") \
2813 \
2814 /* code cache parameters */ \
2815 develop(uintx, CodeCacheSegmentSize, 64, \
2816 "Code cache segment size (in bytes) - smallest unit of " \
2817 "allocation") \
2818 \
2819 develop_pd(intx, CodeEntryAlignment, \
2820 "Code entry alignment for generated code (in bytes)") \
2821 \
2822 product_pd(uintx, InitialCodeCacheSize, \
2823 "Initial code cache size (in bytes)") \
2824 \
2825 product_pd(uintx, ReservedCodeCacheSize, \
2826 "Reserved code cache size (in bytes) - maximum code cache size") \
2827 \
2828 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
2829 "When less than X space left, we stop compiling.") \
2830 \
2831 product_pd(uintx, CodeCacheExpansionSize, \
2832 "Code cache expansion size (in bytes)") \
2833 \
2834 develop_pd(uintx, CodeCacheMinBlockLength, \
2835 "Minimum number of segments in a code cache block.") \
2836 \
2837 notproduct(bool, ExitOnFullCodeCache, false, \
2838 "Exit the VM if we fill the code cache.") \
2839 \
2840 /* interpreter debugging */ \
2841 develop(intx, BinarySwitchThreshold, 5, \
2842 "Minimal number of lookupswitch entries for rewriting to binary " \
2843 "switch") \
2844 \
2845 develop(intx, StopInterpreterAt, 0, \
2846 "Stops interpreter execution at specified bytecode number") \
2847 \
2848 develop(intx, TraceBytecodesAt, 0, \
2849 "Traces bytecodes starting with specified bytecode number") \
2850 \
2851 /* compiler interface */ \
2852 develop(intx, CIStart, 0, \
2853 "the id of the first compilation to permit") \
2854 \
2855 develop(intx, CIStop, -1, \
2856 "the id of the last compilation to permit") \
2857 \
2858 develop(intx, CIStartOSR, 0, \
2859 "the id of the first osr compilation to permit " \
2860 "(CICountOSR must be on)") \
2861 \
2862 develop(intx, CIStopOSR, -1, \
2863 "the id of the last osr compilation to permit " \
2864 "(CICountOSR must be on)") \
2865 \
2866 develop(intx, CIBreakAtOSR, -1, \
2867 "id of osr compilation to break at") \
2868 \
2869 develop(intx, CIBreakAt, -1, \
2870 "id of compilation to break at") \
2871 \
2872 product(ccstrlist, CompileOnly, "", \
2873 "List of methods (pkg/class.name) to restrict compilation to") \
2874 \
2875 product(ccstr, CompileCommandFile, NULL, \
2876 "Read compiler commands from this file [.hotspot_compiler]") \
2877 \
2878 product(ccstrlist, CompileCommand, "", \
2879 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
2880 \
2881 product(bool, CICompilerCountPerCPU, false, \
2882 "1 compiler thread for log(N CPUs)") \
2883 \
2884 develop(intx, CIFireOOMAt, -1, \
2885 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \
2886 "(non-negative value throws OOM after this many CI accesses " \
2887 "in each compile)") \
2888 \
2889 develop(intx, CIFireOOMAtDelay, -1, \
2890 "Wait for this many CI accesses to occur in all compiles before " \
2891 "beginning to throw OutOfMemoryErrors in each compile") \
2892 \
2893 /* Priorities */ \
2894 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \
2895 \
2896 product(intx, ThreadPriorityPolicy, 0, \
2897 "0 : Normal. "\
2898 " VM chooses priorities that are appropriate for normal "\
2899 " applications. On Solaris NORM_PRIORITY and above are mapped "\
2900 " to normal native priority. Java priorities below NORM_PRIORITY"\
2901 " map to lower native priority values. On Windows applications"\
2902 " are allowed to use higher native priorities. However, with "\
2903 " ThreadPriorityPolicy=0, VM will not use the highest possible"\
2904 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
2905 " interfere with system threads. On Linux thread priorities "\
2906 " are ignored because the OS does not support static priority "\
2907 " in SCHED_OTHER scheduling class which is the only choice for"\
2908 " non-root, non-realtime applications. "\
2909 "1 : Aggressive. "\
2910 " Java thread priorities map over to the entire range of "\
2911 " native thread priorities. Higher Java thread priorities map "\
2912 " to higher native thread priorities. This policy should be "\
2913 " used with care, as sometimes it can cause performance "\
2914 " degradation in the application and/or the entire system. On "\
2915 " Linux this policy requires root privilege.") \
2916 \
2917 product(bool, ThreadPriorityVerbose, false, \
2918 "print priority changes") \
2919 \
2920 product(intx, DefaultThreadPriority, -1, \
2921 "what native priority threads run at if not specified elsewhere (-1 means no change)") \
2922 \
2923 product(intx, CompilerThreadPriority, -1, \
2924 "what priority should compiler threads run at (-1 means no change)") \
2925 \
2926 product(intx, VMThreadPriority, -1, \
2927 "what priority should VM threads run at (-1 means no change)") \
2928 \
2929 product(bool, CompilerThreadHintNoPreempt, true, \
2930 "(Solaris only) Give compiler threads an extra quanta") \
2931 \
2932 product(bool, VMThreadHintNoPreempt, false, \
2933 "(Solaris only) Give VM thread an extra quanta") \
2934 \
2935 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2936 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2937 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2938 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2939 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2940 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2941 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2942 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2943 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
2944 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
2945 \
2946 /* compiler debugging */ \
2947 notproduct(intx, CompileTheWorldStartAt, 1, \
2948 "First class to consider when using +CompileTheWorld") \
2949 \
2950 notproduct(intx, CompileTheWorldStopAt, max_jint, \
2951 "Last class to consider when using +CompileTheWorld") \
2952 \
2953 develop(intx, NewCodeParameter, 0, \
2954 "Testing Only: Create a dedicated integer parameter before " \
2955 "putback") \
2956 \
2957 /* new oopmap storage allocation */ \
2958 develop(intx, MinOopMapAllocation, 8, \
2959 "Minimum number of OopMap entries in an OopMapSet") \
2960 \
2961 /* Background Compilation */ \
2962 develop(intx, LongCompileThreshold, 50, \
2963 "Used with +TraceLongCompiles") \
2964 \
2965 product(intx, StarvationMonitorInterval, 200, \
2966 "Pause between each check in ms") \
2967 \
2968 /* recompilation */ \
2969 product_pd(intx, CompileThreshold, \
2970 "number of interpreted method invocations before (re-)compiling") \
2971 \
2972 product_pd(intx, BackEdgeThreshold, \
2973 "Interpreter Back edge threshold at which an OSR compilation is invoked")\
2974 \
2975 product(intx, Tier1BytecodeLimit, 10, \
2976 "Must have at least this many bytecodes before tier1" \
2977 "invocation counters are used") \
2978 \
2979 product_pd(intx, Tier2CompileThreshold, \
2980 "threshold at which a tier 2 compilation is invoked") \
2981 \
2982 product_pd(intx, Tier2BackEdgeThreshold, \
2983 "Back edge threshold at which a tier 2 compilation is invoked") \
2984 \
2985 product_pd(intx, Tier3CompileThreshold, \
2986 "threshold at which a tier 3 compilation is invoked") \
2987 \
2988 product_pd(intx, Tier3BackEdgeThreshold, \
2989 "Back edge threshold at which a tier 3 compilation is invoked") \
2990 \
2991 product_pd(intx, Tier4CompileThreshold, \
2992 "threshold at which a tier 4 compilation is invoked") \
2993 \
2994 product_pd(intx, Tier4BackEdgeThreshold, \
2995 "Back edge threshold at which a tier 4 compilation is invoked") \
2996 \
2997 product_pd(bool, TieredCompilation, \
2998 "Enable two-tier compilation") \
2999 \
3000 product(bool, StressTieredRuntime, false, \
3001 "Alternate client and server compiler on compile requests") \
3002 \
3003 product_pd(intx, OnStackReplacePercentage, \
3004 "NON_TIERED number of method invocations/branches (expressed as %"\
3005 "of CompileThreshold) before (re-)compiling OSR code") \
3006 \
3007 product(intx, InterpreterProfilePercentage, 33, \
3008 "NON_TIERED number of method invocations/branches (expressed as %"\
3009 "of CompileThreshold) before profiling in the interpreter") \
3010 \
3011 develop(intx, MaxRecompilationSearchLength, 10, \
3012 "max. # frames to inspect searching for recompilee") \
3013 \
3014 develop(intx, MaxInterpretedSearchLength, 3, \
3015 "max. # interp. frames to skip when searching for recompilee") \
3016 \
3017 develop(intx, DesiredMethodLimit, 8000, \
3018 "desired max. method size (in bytecodes) after inlining") \
3019 \
3020 develop(intx, HugeMethodLimit, 8000, \
3021 "don't compile methods larger than this if " \
3022 "+DontCompileHugeMethods") \
3023 \
3024 /* New JDK 1.4 reflection implementation */ \
3025 \
3026 develop(bool, UseNewReflection, true, \
3027 "Temporary flag for transition to reflection based on dynamic " \
3028 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3029 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \
3030 "changes were needed") \
3031 \
3032 develop(bool, VerifyReflectionBytecodes, false, \
3033 "Force verification of 1.4 reflection bytecodes. Does not work " \
3034 "in situations like that described in 4486457 or for " \
3035 "constructors generated for serialization, so can not be enabled "\
3036 "in product.") \
3037 \
3038 product(bool, ReflectionWrapResolutionErrors, true, \
3039 "Temporary flag for transition to AbstractMethodError wrapped " \
3040 "in InvocationTargetException. See 6531596") \
3041 \
3042 \
3043 develop(intx, FastSuperclassLimit, 8, \
3044 "Depth of hardwired instanceof accelerator array") \
3045 \
3046 /* Properties for Java libraries */ \
3047 \
3048 product(intx, MaxDirectMemorySize, -1, \
3049 "Maximum total size of NIO direct-buffer allocations") \
3050 \
3051 /* temporary developer defined flags */ \
3052 \
3053 diagnostic(bool, UseNewCode, false, \
3054 "Testing Only: Use the new version while testing") \
3055 \
3056 diagnostic(bool, UseNewCode2, false, \
3057 "Testing Only: Use the new version while testing") \
3058 \
3059 diagnostic(bool, UseNewCode3, false, \
3060 "Testing Only: Use the new version while testing") \
3061 \
3062 /* flags for performance data collection */ \
3063 \
3064 product(bool, UsePerfData, true, \
3065 "Flag to disable jvmstat instrumentation for performance testing" \
3066 "and problem isolation purposes.") \
3067 \
3068 product(bool, PerfDataSaveToFile, false, \
3069 "Save PerfData memory to hsperfdata_<pid> file on exit") \
3070 \
3071 product(ccstr, PerfDataSaveFile, NULL, \
3072 "Save PerfData memory to the specified absolute pathname," \
3073 "%p in the file name if present will be replaced by pid") \
3074 \
3075 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
3076 "Data sampling interval in milliseconds") \
3077 \
3078 develop(bool, PerfTraceDataCreation, false, \
3079 "Trace creation of Performance Data Entries") \
3080 \
3081 develop(bool, PerfTraceMemOps, false, \
3082 "Trace PerfMemory create/attach/detach calls") \
3083 \
3084 product(bool, PerfDisableSharedMem, false, \
3085 "Store performance data in standard memory") \
3086 \
3087 product(intx, PerfDataMemorySize, 32*K, \
3088 "Size of performance data memory region. Will be rounded " \
3089 "up to a multiple of the native os page size.") \
3090 \
3091 product(intx, PerfMaxStringConstLength, 1024, \
3092 "Maximum PerfStringConstant string length before truncation") \
3093 \
3094 product(bool, PerfAllowAtExitRegistration, false, \
3095 "Allow registration of atexit() methods") \
3096 \
3097 product(bool, PerfBypassFileSystemCheck, false, \
3098 "Bypass Win32 file system criteria checks (Windows Only)") \
3099 \
3100 product(intx, UnguardOnExecutionViolation, 0, \
3101 "Unguard page and retry on no-execute fault (Win32 only)" \
3102 "0=off, 1=conservative, 2=aggressive") \
3103 \
3104 /* Serviceability Support */ \
3105 \
3106 product(bool, ManagementServer, false, \
3107 "Create JMX Management Server") \
3108 \
3109 product(bool, DisableAttachMechanism, false, \
3110 "Disable mechanism that allows tools to attach to this VM") \
3111 \
3112 product(bool, StartAttachListener, false, \
3113 "Always start Attach Listener at VM startup") \
3114 \
3115 manageable(bool, PrintConcurrentLocks, false, \
3116 "Print java.util.concurrent locks in thread dump") \
3117 \
3118 /* Shared spaces */ \
3119 \
3120 product(bool, UseSharedSpaces, true, \
3121 "Use shared spaces in the permanent generation") \
3122 \
3123 product(bool, RequireSharedSpaces, false, \
3124 "Require shared spaces in the permanent generation") \
3125 \
3126 product(bool, ForceSharedSpaces, false, \
3127 "Require shared spaces in the permanent generation") \
3128 \
3129 product(bool, DumpSharedSpaces, false, \
3130 "Special mode: JVM reads a class list, loads classes, builds " \
3131 "shared spaces, and dumps the shared spaces to a file to be " \
3132 "used in future JVM runs.") \
3133 \
3134 product(bool, PrintSharedSpaces, false, \
3135 "Print usage of shared spaces") \
3136 \
3137 product(uintx, SharedDummyBlockSize, 512*M, \
3138 "Size of dummy block used to shift heap addresses (in bytes)") \
3139 \
3140 product(uintx, SharedReadWriteSize, 12*M, \
3141 "Size of read-write space in permanent generation (in bytes)") \
3142 \
3143 product(uintx, SharedReadOnlySize, 8*M, \
3144 "Size of read-only space in permanent generation (in bytes)") \
3145 \
3146 product(uintx, SharedMiscDataSize, 4*M, \
3147 "Size of the shared data area adjacent to the heap (in bytes)") \
3148 \
3149 product(uintx, SharedMiscCodeSize, 4*M, \
3150 "Size of the shared code area adjacent to the heap (in bytes)") \
3151 \
3152 diagnostic(bool, SharedOptimizeColdStart, true, \
3153 "At dump time, order shared objects to achieve better " \
3154 "cold startup time.") \
3155 \
3156 develop(intx, SharedOptimizeColdStartPolicy, 2, \
3157 "Reordering policy for SharedOptimizeColdStart " \
3158 "0=favor classload-time locality, 1=balanced, " \
3159 "2=favor runtime locality") \
3160 \
3161 diagnostic(bool, SharedSkipVerify, false, \
3162 "Skip assert() and verify() which page-in unwanted shared " \
3163 "objects. ") \
3164 \
3165 product(bool, TaggedStackInterpreter, false, \
3166 "Insert tags in interpreter execution stack for oopmap generaion")\
3167 \
3168 diagnostic(bool, PauseAtStartup, false, \
3169 "Causes the VM to pause at startup time and wait for the pause " \
3170 "file to be removed (default: ./vm.paused.<pid>)") \
3171 \
3172 diagnostic(ccstr, PauseAtStartupFile, NULL, \
3173 "The file to create and for whose removal to await when pausing " \
3174 "at startup. (default: ./vm.paused.<pid>)") \
3175 \
3176 product(bool, ExtendedDTraceProbes, false, \
3177 "Enable performance-impacting dtrace probes") \
3178 \
3179 product(bool, DTraceMethodProbes, false, \
3180 "Enable dtrace probes for method-entry and method-exit") \
3181 \
3182 product(bool, DTraceAllocProbes, false, \
3183 "Enable dtrace probes for object allocation") \
3184 \
3185 product(bool, DTraceMonitorProbes, false, \
3186 "Enable dtrace probes for monitor events") \
3187 \
3188 product(bool, RelaxAccessControlCheck, false, \
3189 "Relax the access control checks in the verifier") \
3190 \
3191 diagnostic(bool, PrintDTraceDOF, false, \
3192 "Print the DTrace DOF passed to the system for JSDT probes") \
3193 \
3194 product(bool, UseVMInterruptibleIO, true, \
3195 "(Unstable, Solaris-specific) Thread interrupt before or with " \
3196 "EINTR for I/O operations results in OS_INTRPT")
3199 /*
3200 * Macros for factoring of globals
3201 */
3203 // Interface macros
3204 #define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3205 #define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
3206 #define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3207 #define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3208 #define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3209 #ifdef PRODUCT
3210 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
3211 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
3212 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3213 #else
3214 #define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
3215 #define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
3216 #define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3217 #endif
3218 // Special LP64 flags, product only needed for now.
3219 #ifdef _LP64
3220 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3221 #else
3222 #define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3223 #endif // _LP64
3225 // Implementation macros
3226 #define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
3227 #define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
3228 #define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3229 #define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3230 #define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3231 #ifdef PRODUCT
3232 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3233 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
3234 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3235 #else
3236 #define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3237 #define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
3238 #define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3239 #endif
3240 #ifdef _LP64
3241 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
3242 #else
3243 #define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3244 #endif // _LP64
3246 RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG)
3248 RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
