globals.hpp revision 5965:bdd155477289
1/* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26#define SHARE_VM_RUNTIME_GLOBALS_HPP 27 28#include "utilities/debug.hpp" 29 30// use this for flags that are true per default in the tiered build 31// but false in non-tiered builds, and vice versa 32#ifdef TIERED 33#define trueInTiered true 34#define falseInTiered false 35#else 36#define trueInTiered false 37#define falseInTiered true 38#endif 39 40#ifdef TARGET_ARCH_x86 41# include "globals_x86.hpp" 42#endif 43#ifdef TARGET_ARCH_sparc 44# include "globals_sparc.hpp" 45#endif 46#ifdef TARGET_ARCH_zero 47# include "globals_zero.hpp" 48#endif 49#ifdef TARGET_ARCH_arm 50# include "globals_arm.hpp" 51#endif 52#ifdef TARGET_ARCH_ppc 53# include "globals_ppc.hpp" 54#endif 55#ifdef TARGET_OS_FAMILY_linux 56# include "globals_linux.hpp" 57#endif 58#ifdef TARGET_OS_FAMILY_solaris 59# include "globals_solaris.hpp" 60#endif 61#ifdef TARGET_OS_FAMILY_windows 62# include "globals_windows.hpp" 63#endif 64#ifdef TARGET_OS_FAMILY_aix 65# include "globals_aix.hpp" 66#endif 67#ifdef TARGET_OS_FAMILY_bsd 68# include "globals_bsd.hpp" 69#endif 70#ifdef TARGET_OS_ARCH_linux_x86 71# include "globals_linux_x86.hpp" 72#endif 73#ifdef TARGET_OS_ARCH_linux_sparc 74# include "globals_linux_sparc.hpp" 75#endif 76#ifdef TARGET_OS_ARCH_linux_zero 77# include "globals_linux_zero.hpp" 78#endif 79#ifdef TARGET_OS_ARCH_solaris_x86 80# include "globals_solaris_x86.hpp" 81#endif 82#ifdef TARGET_OS_ARCH_solaris_sparc 83# include "globals_solaris_sparc.hpp" 84#endif 85#ifdef TARGET_OS_ARCH_windows_x86 86# include "globals_windows_x86.hpp" 87#endif 88#ifdef TARGET_OS_ARCH_linux_arm 89# include "globals_linux_arm.hpp" 90#endif 91#ifdef TARGET_OS_ARCH_linux_ppc 92# include "globals_linux_ppc.hpp" 93#endif 94#ifdef TARGET_OS_ARCH_aix_ppc 95# include "globals_aix_ppc.hpp" 96#endif 97#ifdef TARGET_OS_ARCH_bsd_x86 98# include "globals_bsd_x86.hpp" 99#endif 100#ifdef TARGET_OS_ARCH_bsd_zero 101# include "globals_bsd_zero.hpp" 102#endif 103#ifdef COMPILER1 104#ifdef TARGET_ARCH_x86 105# include "c1_globals_x86.hpp" 106#endif 107#ifdef TARGET_ARCH_sparc 108# include "c1_globals_sparc.hpp" 109#endif 110#ifdef TARGET_ARCH_arm 111# include "c1_globals_arm.hpp" 112#endif 113#ifdef TARGET_ARCH_ppc 114# include "c1_globals_ppc.hpp" 115#endif 116#ifdef TARGET_OS_FAMILY_linux 117# include "c1_globals_linux.hpp" 118#endif 119#ifdef TARGET_OS_FAMILY_solaris 120# include "c1_globals_solaris.hpp" 121#endif 122#ifdef TARGET_OS_FAMILY_windows 123# include "c1_globals_windows.hpp" 124#endif 125#ifdef TARGET_OS_FAMILY_aix 126# include "c1_globals_aix.hpp" 127#endif 128#ifdef TARGET_OS_FAMILY_bsd 129# include "c1_globals_bsd.hpp" 130#endif 131#endif 132#ifdef COMPILER2 133#ifdef TARGET_ARCH_x86 134# include "c2_globals_x86.hpp" 135#endif 136#ifdef TARGET_ARCH_sparc 137# include "c2_globals_sparc.hpp" 138#endif 139#ifdef TARGET_ARCH_arm 140# include "c2_globals_arm.hpp" 141#endif 142#ifdef TARGET_ARCH_ppc 143# include "c2_globals_ppc.hpp" 144#endif 145#ifdef TARGET_OS_FAMILY_linux 146# include "c2_globals_linux.hpp" 147#endif 148#ifdef TARGET_OS_FAMILY_solaris 149# include "c2_globals_solaris.hpp" 150#endif 151#ifdef TARGET_OS_FAMILY_windows 152# include "c2_globals_windows.hpp" 153#endif 154#ifdef TARGET_OS_FAMILY_aix 155# include "c2_globals_aix.hpp" 156#endif 157#ifdef TARGET_OS_FAMILY_bsd 158# include "c2_globals_bsd.hpp" 159#endif 160#endif 161#ifdef SHARK 162#ifdef TARGET_ARCH_zero 163# include "shark_globals_zero.hpp" 164#endif 165#endif 166 167#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 168define_pd_global(bool, BackgroundCompilation, false); 169define_pd_global(bool, UseTLAB, false); 170define_pd_global(bool, CICompileOSR, false); 171define_pd_global(bool, UseTypeProfile, false); 172define_pd_global(bool, UseOnStackReplacement, false); 173define_pd_global(bool, InlineIntrinsics, false); 174define_pd_global(bool, PreferInterpreterNativeStubs, true); 175define_pd_global(bool, ProfileInterpreter, false); 176define_pd_global(bool, ProfileTraps, false); 177define_pd_global(bool, TieredCompilation, false); 178 179define_pd_global(intx, CompileThreshold, 0); 180define_pd_global(intx, BackEdgeThreshold, 0); 181 182define_pd_global(intx, OnStackReplacePercentage, 0); 183define_pd_global(bool, ResizeTLAB, false); 184define_pd_global(intx, FreqInlineSize, 0); 185define_pd_global(intx, NewSizeThreadIncrease, 4*K); 186define_pd_global(intx, InlineClassNatives, true); 187define_pd_global(intx, InlineUnsafeOps, true); 188define_pd_global(intx, InitialCodeCacheSize, 160*K); 189define_pd_global(intx, ReservedCodeCacheSize, 32*M); 190define_pd_global(intx, CodeCacheExpansionSize, 32*K); 191define_pd_global(intx, CodeCacheMinBlockLength, 1); 192define_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 193define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 194define_pd_global(bool, NeverActAsServerClassMachine, true); 195define_pd_global(uint64_t,MaxRAM, 1ULL*G); 196#define CI_COMPILER_COUNT 0 197#else 198 199#ifdef COMPILER2 200#define CI_COMPILER_COUNT 2 201#else 202#define CI_COMPILER_COUNT 1 203#endif // COMPILER2 204 205#endif // no compilers 206 207// string type aliases used only in this file 208typedef const char* ccstr; 209typedef const char* ccstrlist; // represents string arguments which accumulate 210 211enum FlagValueOrigin { 212 DEFAULT = 0, 213 COMMAND_LINE = 1, 214 ENVIRON_VAR = 2, 215 CONFIG_FILE = 3, 216 MANAGEMENT = 4, 217 ERGONOMIC = 5, 218 ATTACH_ON_DEMAND = 6, 219 INTERNAL = 99 220}; 221 222struct Flag { 223 const char *type; 224 const char *name; 225 void* addr; 226 227 NOT_PRODUCT(const char *doc;) 228 229 const char *kind; 230 FlagValueOrigin origin; 231 232 // points to all Flags static array 233 static Flag *flags; 234 235 // number of flags 236 static size_t numFlags; 237 238 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false); 239 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 240 241 bool is_bool() const { return strcmp(type, "bool") == 0; } 242 bool get_bool() const { return *((bool*) addr); } 243 void set_bool(bool value) { *((bool*) addr) = value; } 244 245 bool is_intx() const { return strcmp(type, "intx") == 0; } 246 intx get_intx() const { return *((intx*) addr); } 247 void set_intx(intx value) { *((intx*) addr) = value; } 248 249 bool is_uintx() const { return strcmp(type, "uintx") == 0; } 250 uintx get_uintx() const { return *((uintx*) addr); } 251 void set_uintx(uintx value) { *((uintx*) addr) = value; } 252 253 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 254 uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 255 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 256 257 bool is_double() const { return strcmp(type, "double") == 0; } 258 double get_double() const { return *((double*) addr); } 259 void set_double(double value) { *((double*) addr) = value; } 260 261 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 262 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 263 ccstr get_ccstr() const { return *((ccstr*) addr); } 264 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 265 266 bool is_unlocker() const; 267 bool is_unlocked() const; 268 bool is_writeable() const; 269 bool is_external() const; 270 271 bool is_unlocker_ext() const; 272 bool is_unlocked_ext() const; 273 bool is_writeable_ext() const; 274 bool is_external_ext() const; 275 276 void get_locked_message(char*, int) const; 277 void get_locked_message_ext(char*, int) const; 278 279 void print_on(outputStream* st, bool withComments = false ); 280 void print_as_flag(outputStream* st); 281}; 282 283// debug flags control various aspects of the VM and are global accessible 284 285// use FlagSetting to temporarily change some debug flag 286// e.g. FlagSetting fs(DebugThisAndThat, true); 287// restored to previous value upon leaving scope 288class FlagSetting { 289 bool val; 290 bool* flag; 291 public: 292 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 293 ~FlagSetting() { *flag = val; } 294}; 295 296 297class CounterSetting { 298 intx* counter; 299 public: 300 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 301 ~CounterSetting() { (*counter)--; } 302}; 303 304 305class UIntFlagSetting { 306 uintx val; 307 uintx* flag; 308 public: 309 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 310 ~UIntFlagSetting() { *flag = val; } 311}; 312 313 314class DoubleFlagSetting { 315 double val; 316 double* flag; 317 public: 318 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 319 ~DoubleFlagSetting() { *flag = val; } 320}; 321 322 323class CommandLineFlags { 324 public: 325 static bool boolAt(char* name, size_t len, bool* value); 326 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 327 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 328 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 329 330 static bool intxAt(char* name, size_t len, intx* value); 331 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 332 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 333 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 334 335 static bool uintxAt(char* name, size_t len, uintx* value); 336 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 337 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 338 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 339 340 static bool uint64_tAt(char* name, size_t len, uint64_t* value); 341 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 342 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 343 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 344 345 static bool doubleAt(char* name, size_t len, double* value); 346 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 347 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 348 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 349 350 static bool ccstrAt(char* name, size_t len, ccstr* value); 351 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 352 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 353 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 354 355 // Returns false if name is not a command line flag. 356 static bool wasSetOnCmdline(const char* name, bool* value); 357 static void printSetFlags(outputStream* out); 358 359 static void printFlags(outputStream* out, bool withComments); 360 361 static void verify() PRODUCT_RETURN; 362}; 363 364// use this for flags that are true by default in the debug version but 365// false in the optimized version, and vice versa 366#ifdef ASSERT 367#define trueInDebug true 368#define falseInDebug false 369#else 370#define trueInDebug false 371#define falseInDebug true 372#endif 373 374// use this for flags that are true per default in the product build 375// but false in development builds, and vice versa 376#ifdef PRODUCT 377#define trueInProduct true 378#define falseInProduct false 379#else 380#define trueInProduct false 381#define falseInProduct true 382#endif 383 384#ifdef JAVASE_EMBEDDED 385#define falseInEmbedded false 386#else 387#define falseInEmbedded true 388#endif 389 390// develop flags are settable / visible only during development and are constant in the PRODUCT version 391// product flags are always settable / visible 392// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 393 394// A flag must be declared with one of the following types: 395// bool, intx, uintx, ccstr. 396// The type "ccstr" is an alias for "const char*" and is used 397// only in this file, because the macrology requires single-token type names. 398 399// Note: Diagnostic options not meant for VM tuning or for product modes. 400// They are to be used for VM quality assurance or field diagnosis 401// of VM bugs. They are hidden so that users will not be encouraged to 402// try them as if they were VM ordinary execution options. However, they 403// are available in the product version of the VM. Under instruction 404// from support engineers, VM customers can turn them on to collect 405// diagnostic information about VM problems. To use a VM diagnostic 406// option, you must first specify +UnlockDiagnosticVMOptions. 407// (This master switch also affects the behavior of -Xprintflags.) 408// 409// experimental flags are in support of features that are not 410// part of the officially supported product, but are available 411// for experimenting with. They could, for example, be performance 412// features that may not have undergone full or rigorous QA, but which may 413// help performance in some cases and released for experimentation 414// by the community of users and developers. This flag also allows one to 415// be able to build a fully supported product that nonetheless also 416// ships with some unsupported, lightly tested, experimental features. 417// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 418// UnlockExperimentalVMOptions flag, which allows the control and 419// modification of the experimental flags. 420// 421// Nota bene: neither diagnostic nor experimental options should be used casually, 422// and they are not supported on production loads, except under explicit 423// direction from support engineers. 424// 425// manageable flags are writeable external product flags. 426// They are dynamically writeable through the JDK management interface 427// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 428// These flags are external exported interface (see CCC). The list of 429// manageable flags can be queried programmatically through the management 430// interface. 431// 432// A flag can be made as "manageable" only if 433// - the flag is defined in a CCC as an external exported interface. 434// - the VM implementation supports dynamic setting of the flag. 435// This implies that the VM must *always* query the flag variable 436// and not reuse state related to the flag state at any given time. 437// - you want the flag to be queried programmatically by the customers. 438// 439// product_rw flags are writeable internal product flags. 440// They are like "manageable" flags but for internal/private use. 441// The list of product_rw flags are internal/private flags which 442// may be changed/removed in a future release. It can be set 443// through the management interface to get/set value 444// when the name of flag is supplied. 445// 446// A flag can be made as "product_rw" only if 447// - the VM implementation supports dynamic setting of the flag. 448// This implies that the VM must *always* query the flag variable 449// and not reuse state related to the flag state at any given time. 450// 451// Note that when there is a need to support develop flags to be writeable, 452// it can be done in the same way as product_rw. 453 454#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 455 \ 456 lp64_product(bool, UseCompressedOops, false, \ 457 "Use 32-bit object references in 64-bit VM " \ 458 "lp64_product means flag is always constant in 32 bit VM") \ 459 \ 460 lp64_product(bool, UseCompressedKlassPointers, false, \ 461 "Use 32-bit klass pointers in 64-bit VM " \ 462 "lp64_product means flag is always constant in 32 bit VM") \ 463 \ 464 notproduct(bool, CheckCompressedOops, true, \ 465 "generate checks in encoding/decoding code in debug VM") \ 466 \ 467 product_pd(uintx, HeapBaseMinAddress, \ 468 "OS specific low limit for heap base address") \ 469 \ 470 diagnostic(bool, PrintCompressedOopsMode, false, \ 471 "Print compressed oops base address and encoding mode") \ 472 \ 473 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 474 "Default object alignment in bytes, 8 is minimum") \ 475 \ 476 product(bool, AssumeMP, false, \ 477 "Instruct the VM to assume multiple processors are available") \ 478 \ 479 /* UseMembar is theoretically a temp flag used for memory barrier \ 480 * removal testing. It was supposed to be removed before FCS but has \ 481 * been re-added (see 6401008) */ \ 482 product_pd(bool, UseMembar, \ 483 "(Unstable) Issues membars on thread state transitions") \ 484 \ 485 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 486 * that don't support it. This will be replaced by processor detection \ 487 * logic. \ 488 */ \ 489 product(bool, UsePPCLWSYNC, true, \ 490 "Use lwsync instruction if true, else use slower sync") \ 491 \ 492 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 493 "Whether to clean the chunk pool asynchronously") \ 494 \ 495 /* Temporary: See 6948537 */ \ 496 experimental(bool, UseMemSetInBOT, true, \ 497 "(Unstable) uses memset in BOT updates in GC code") \ 498 \ 499 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 500 "Enable normal processing of flags relating to field diagnostics")\ 501 \ 502 experimental(bool, UnlockExperimentalVMOptions, false, \ 503 "Enable normal processing of flags relating to experimental features")\ 504 \ 505 product(bool, JavaMonitorsInStackTrace, true, \ 506 "Print info. about Java monitor locks when the stacks are dumped")\ 507 \ 508 product_pd(bool, UseLargePages, \ 509 "Use large page memory") \ 510 \ 511 product_pd(bool, UseLargePagesIndividualAllocation, \ 512 "Allocate large pages individually for better affinity") \ 513 \ 514 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 515 "Fail large pages individual allocation") \ 516 \ 517 develop(bool, TracePageSizes, false, \ 518 "Trace page size selection and usage.") \ 519 \ 520 product(bool, UseNUMA, false, \ 521 "Use NUMA if available") \ 522 \ 523 product(bool, UseNUMAInterleaving, false, \ 524 "Interleave memory across NUMA nodes if available") \ 525 \ 526 product(uintx, NUMAInterleaveGranularity, 2*M, \ 527 "Granularity to use for NUMA interleaving on Windows OS") \ 528 \ 529 product(bool, ForceNUMA, false, \ 530 "Force NUMA optimizations on single-node/UMA systems") \ 531 \ 532 product(uintx, NUMAChunkResizeWeight, 20, \ 533 "Percentage (0-100) used to weigh the current sample when " \ 534 "computing exponentially decaying average for " \ 535 "AdaptiveNUMAChunkSizing") \ 536 \ 537 product(uintx, NUMASpaceResizeRate, 1*G, \ 538 "Do not reallocate more that this amount per collection") \ 539 \ 540 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 541 "Enable adaptive chunk sizing for NUMA") \ 542 \ 543 product(bool, NUMAStats, false, \ 544 "Print NUMA stats in detailed heap information") \ 545 \ 546 product(uintx, NUMAPageScanRate, 256, \ 547 "Maximum number of pages to include in the page scan procedure") \ 548 \ 549 product_pd(bool, NeedsDeoptSuspend, \ 550 "True for register window machines (sparc/ia64)") \ 551 \ 552 product(intx, UseSSE, 99, \ 553 "Highest supported SSE instructions set on x86/x64") \ 554 \ 555 product(bool, UseAES, false, \ 556 "Control whether AES instructions can be used on x86/x64") \ 557 \ 558 product(uintx, LargePageSizeInBytes, 0, \ 559 "Large page size (0 to let VM choose the page size") \ 560 \ 561 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 562 "Use large pages if max heap is at least this big") \ 563 \ 564 product(bool, ForceTimeHighResolution, false, \ 565 "Using high time resolution(For Win32 only)") \ 566 \ 567 develop(bool, TraceItables, false, \ 568 "Trace initialization and use of itables") \ 569 \ 570 develop(bool, TracePcPatching, false, \ 571 "Trace usage of frame::patch_pc") \ 572 \ 573 develop(bool, TraceJumps, false, \ 574 "Trace assembly jumps in thread ring buffer") \ 575 \ 576 develop(bool, TraceRelocator, false, \ 577 "Trace the bytecode relocator") \ 578 \ 579 develop(bool, TraceLongCompiles, false, \ 580 "Print out every time compilation is longer than " \ 581 "a given threashold") \ 582 \ 583 develop(bool, SafepointALot, false, \ 584 "Generates a lot of safepoints. Works with " \ 585 "GuaranteedSafepointInterval") \ 586 \ 587 product_pd(bool, BackgroundCompilation, \ 588 "A thread requesting compilation is not blocked during " \ 589 "compilation") \ 590 \ 591 product(bool, PrintVMQWaitTime, false, \ 592 "Prints out the waiting time in VM operation queue") \ 593 \ 594 develop(bool, NoYieldsInMicrolock, false, \ 595 "Disable yields in microlock") \ 596 \ 597 develop(bool, TraceOopMapGeneration, false, \ 598 "Shows oopmap generation") \ 599 \ 600 product(bool, MethodFlushing, true, \ 601 "Reclamation of zombie and not-entrant methods") \ 602 \ 603 develop(bool, VerifyStack, false, \ 604 "Verify stack of each thread when it is entering a runtime call") \ 605 \ 606 diagnostic(bool, ForceUnreachable, false, \ 607 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 608 \ 609 notproduct(bool, StressDerivedPointers, false, \ 610 "Force scavenge when a derived pointers is detected on stack " \ 611 "after rtm call") \ 612 \ 613 develop(bool, TraceDerivedPointers, false, \ 614 "Trace traversal of derived pointers on stack") \ 615 \ 616 notproduct(bool, TraceCodeBlobStacks, false, \ 617 "Trace stack-walk of codeblobs") \ 618 \ 619 product(bool, PrintJNIResolving, false, \ 620 "Used to implement -v:jni") \ 621 \ 622 notproduct(bool, PrintRewrites, false, \ 623 "Print methods that are being rewritten") \ 624 \ 625 product(bool, UseInlineCaches, true, \ 626 "Use Inline Caches for virtual calls ") \ 627 \ 628 develop(bool, InlineArrayCopy, true, \ 629 "inline arraycopy native that is known to be part of " \ 630 "base library DLL") \ 631 \ 632 develop(bool, InlineObjectHash, true, \ 633 "inline Object::hashCode() native that is known to be part " \ 634 "of base library DLL") \ 635 \ 636 develop(bool, InlineNatives, true, \ 637 "inline natives that are known to be part of base library DLL") \ 638 \ 639 develop(bool, InlineMathNatives, true, \ 640 "inline SinD, CosD, etc.") \ 641 \ 642 develop(bool, InlineClassNatives, true, \ 643 "inline Class.isInstance, etc") \ 644 \ 645 develop(bool, InlineThreadNatives, true, \ 646 "inline Thread.currentThread, etc") \ 647 \ 648 develop(bool, InlineUnsafeOps, true, \ 649 "inline memory ops (native methods) from sun.misc.Unsafe") \ 650 \ 651 product(bool, CriticalJNINatives, true, \ 652 "check for critical JNI entry points") \ 653 \ 654 notproduct(bool, StressCriticalJNINatives, false, \ 655 "Exercise register saving code in critical natives") \ 656 \ 657 product(bool, UseSSE42Intrinsics, false, \ 658 "SSE4.2 versions of intrinsics") \ 659 \ 660 product(bool, UseAESIntrinsics, false, \ 661 "use intrinsics for AES versions of crypto") \ 662 \ 663 product(bool, UseCRC32Intrinsics, false, \ 664 "use intrinsics for java.util.zip.CRC32") \ 665 \ 666 develop(bool, TraceCallFixup, false, \ 667 "traces all call fixups") \ 668 \ 669 develop(bool, DeoptimizeALot, false, \ 670 "deoptimize at every exit from the runtime system") \ 671 \ 672 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 673 "a comma separated list of bcis to deoptimize at") \ 674 \ 675 product(bool, DeoptimizeRandom, false, \ 676 "deoptimize random frames on random exit from the runtime system")\ 677 \ 678 notproduct(bool, ZombieALot, false, \ 679 "creates zombies (non-entrant) at exit from the runt. system") \ 680 \ 681 product(bool, UnlinkSymbolsALot, false, \ 682 "unlink unreferenced symbols from the symbol table at safepoints")\ 683 \ 684 notproduct(bool, WalkStackALot, false, \ 685 "trace stack (no print) at every exit from the runtime system") \ 686 \ 687 product(bool, Debugging, false, \ 688 "set when executing debug methods in debug.ccp " \ 689 "(to prevent triggering assertions)") \ 690 \ 691 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 692 "Enable strict checks that safepoints cannot happen for threads " \ 693 "that used No_Safepoint_Verifier") \ 694 \ 695 notproduct(bool, VerifyLastFrame, false, \ 696 "Verify oops on last frame on entry to VM") \ 697 \ 698 develop(bool, TraceHandleAllocation, false, \ 699 "Prints out warnings when suspicious many handles are allocated") \ 700 \ 701 product(bool, UseCompilerSafepoints, true, \ 702 "Stop at safepoints in compiled code") \ 703 \ 704 product(bool, FailOverToOldVerifier, true, \ 705 "fail over to old verifier when split verifier fails") \ 706 \ 707 develop(bool, ShowSafepointMsgs, false, \ 708 "Show msg. about safepoint synch.") \ 709 \ 710 product(bool, SafepointTimeout, false, \ 711 "Time out and warn or fail after SafepointTimeoutDelay " \ 712 "milliseconds if failed to reach safepoint") \ 713 \ 714 develop(bool, DieOnSafepointTimeout, false, \ 715 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 716 \ 717 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 718 /* typically, at most a few retries are needed */ \ 719 product(intx, SuspendRetryCount, 50, \ 720 "Maximum retry count for an external suspend request") \ 721 \ 722 product(intx, SuspendRetryDelay, 5, \ 723 "Milliseconds to delay per retry (* current_retry_count)") \ 724 \ 725 product(bool, AssertOnSuspendWaitFailure, false, \ 726 "Assert/Guarantee on external suspend wait failure") \ 727 \ 728 product(bool, TraceSuspendWaitFailures, false, \ 729 "Trace external suspend wait failures") \ 730 \ 731 product(bool, MaxFDLimit, true, \ 732 "Bump the number of file descriptors to max in solaris.") \ 733 \ 734 diagnostic(bool, LogEvents, true, \ 735 "Enable the various ring buffer event logs") \ 736 \ 737 diagnostic(uintx, LogEventsBufferEntries, 10, \ 738 "Enable the various ring buffer event logs") \ 739 \ 740 product(bool, BytecodeVerificationRemote, true, \ 741 "Enables the Java bytecode verifier for remote classes") \ 742 \ 743 product(bool, BytecodeVerificationLocal, false, \ 744 "Enables the Java bytecode verifier for local classes") \ 745 \ 746 develop(bool, ForceFloatExceptions, trueInDebug, \ 747 "Force exceptions on FP stack under/overflow") \ 748 \ 749 develop(bool, VerifyStackAtCalls, false, \ 750 "Verify that the stack pointer is unchanged after calls") \ 751 \ 752 develop(bool, TraceJavaAssertions, false, \ 753 "Trace java language assertions") \ 754 \ 755 notproduct(bool, CheckAssertionStatusDirectives, false, \ 756 "temporary - see javaClasses.cpp") \ 757 \ 758 notproduct(bool, PrintMallocFree, false, \ 759 "Trace calls to C heap malloc/free allocation") \ 760 \ 761 product(bool, PrintOopAddress, false, \ 762 "Always print the location of the oop") \ 763 \ 764 notproduct(bool, VerifyCodeCacheOften, false, \ 765 "Verify compiled-code cache often") \ 766 \ 767 develop(bool, ZapDeadCompiledLocals, false, \ 768 "Zap dead locals in compiler frames") \ 769 \ 770 notproduct(bool, ZapDeadLocalsOld, false, \ 771 "Zap dead locals (old version, zaps all frames when " \ 772 "entering the VM") \ 773 \ 774 notproduct(bool, CheckOopishValues, false, \ 775 "Warn if value contains oop ( requires ZapDeadLocals)") \ 776 \ 777 develop(bool, UseMallocOnly, false, \ 778 "use only malloc/free for allocation (no resource area/arena)") \ 779 \ 780 develop(bool, PrintMalloc, false, \ 781 "print all malloc/free calls") \ 782 \ 783 develop(bool, PrintMallocStatistics, false, \ 784 "print malloc/free statistics") \ 785 \ 786 develop(bool, ZapResourceArea, trueInDebug, \ 787 "Zap freed resource/arena space with 0xABABABAB") \ 788 \ 789 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 790 "Zap freed VM handle space with 0xBCBCBCBC") \ 791 \ 792 develop(bool, ZapJNIHandleArea, trueInDebug, \ 793 "Zap freed JNI handle space with 0xFEFEFEFE") \ 794 \ 795 notproduct(bool, ZapStackSegments, trueInDebug, \ 796 "Zap allocated/freed Stack segments with 0xFADFADED") \ 797 \ 798 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 799 "Zap unused heap space with 0xBAADBABE") \ 800 \ 801 develop(bool, TraceZapUnusedHeapArea, false, \ 802 "Trace zapping of unused heap space") \ 803 \ 804 develop(bool, CheckZapUnusedHeapArea, false, \ 805 "Check zapping of unused heap space") \ 806 \ 807 develop(bool, ZapFillerObjects, trueInDebug, \ 808 "Zap filler objects with 0xDEAFBABE") \ 809 \ 810 develop(bool, PrintVMMessages, true, \ 811 "Print vm messages on console") \ 812 \ 813 product(bool, PrintGCApplicationConcurrentTime, false, \ 814 "Print the time the application has been running") \ 815 \ 816 product(bool, PrintGCApplicationStoppedTime, false, \ 817 "Print the time the application has been stopped") \ 818 \ 819 diagnostic(bool, VerboseVerification, false, \ 820 "Display detailed verification details") \ 821 \ 822 notproduct(uintx, ErrorHandlerTest, 0, \ 823 "If > 0, provokes an error after VM initialization; the value" \ 824 "determines which error to provoke. See test_error_handler()" \ 825 "in debug.cpp.") \ 826 \ 827 develop(bool, Verbose, false, \ 828 "Prints additional debugging information from other modes") \ 829 \ 830 develop(bool, PrintMiscellaneous, false, \ 831 "Prints uncategorized debugging information (requires +Verbose)") \ 832 \ 833 develop(bool, WizardMode, false, \ 834 "Prints much more debugging information") \ 835 \ 836 product(bool, ShowMessageBoxOnError, false, \ 837 "Keep process alive on VM fatal error") \ 838 \ 839 product(bool, CreateMinidumpOnCrash, false, \ 840 "Create minidump on VM fatal error") \ 841 \ 842 product_pd(bool, UseOSErrorReporting, \ 843 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 844 \ 845 product(bool, SuppressFatalErrorMessage, false, \ 846 "Do NO Fatal Error report [Avoid deadlock]") \ 847 \ 848 product(ccstrlist, OnError, "", \ 849 "Run user-defined commands on fatal error; see VMError.cpp " \ 850 "for examples") \ 851 \ 852 product(ccstrlist, OnOutOfMemoryError, "", \ 853 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 854 \ 855 manageable(bool, HeapDumpBeforeFullGC, false, \ 856 "Dump heap to file before any major stop-world GC") \ 857 \ 858 manageable(bool, HeapDumpAfterFullGC, false, \ 859 "Dump heap to file after any major stop-world GC") \ 860 \ 861 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 862 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 863 \ 864 manageable(ccstr, HeapDumpPath, NULL, \ 865 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 866 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 867 "in the working directory)") \ 868 \ 869 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 870 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 871 "when the heap usage is larger than this") \ 872 \ 873 develop(uintx, HeapDumpSegmentSize, 1*G, \ 874 "Approximate segment size when generating a segmented heap dump") \ 875 \ 876 develop(bool, BreakAtWarning, false, \ 877 "Execute breakpoint upon encountering VM warning") \ 878 \ 879 develop(bool, TraceVMOperation, false, \ 880 "Trace vm operations") \ 881 \ 882 develop(bool, UseFakeTimers, false, \ 883 "Tells whether the VM should use system time or a fake timer") \ 884 \ 885 product(ccstr, NativeMemoryTracking, "off", \ 886 "Native memory tracking options") \ 887 \ 888 diagnostic(bool, PrintNMTStatistics, false, \ 889 "Print native memory tracking summary data if it is on") \ 890 \ 891 diagnostic(bool, AutoShutdownNMT, true, \ 892 "Automatically shutdown native memory tracking under stress " \ 893 "situation. When set to false, native memory tracking tries to " \ 894 "stay alive at the expense of JVM performance") \ 895 \ 896 diagnostic(bool, LogCompilation, false, \ 897 "Log compilation activity in detail to hotspot.log or LogFile") \ 898 \ 899 product(bool, PrintCompilation, false, \ 900 "Print compilations") \ 901 \ 902 diagnostic(bool, TraceNMethodInstalls, false, \ 903 "Trace nmethod intallation") \ 904 \ 905 diagnostic(intx, ScavengeRootsInCode, 2, \ 906 "0: do not allow scavengable oops in the code cache; " \ 907 "1: allow scavenging from the code cache; " \ 908 "2: emit as many constants as the compiler can see") \ 909 \ 910 product(bool, AlwaysRestoreFPU, false, \ 911 "Restore the FPU control word after every JNI call (expensive)") \ 912 \ 913 diagnostic(bool, PrintCompilation2, false, \ 914 "Print additional statistics per compilation") \ 915 \ 916 diagnostic(bool, PrintAdapterHandlers, false, \ 917 "Print code generated for i2c/c2i adapters") \ 918 \ 919 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 920 "Verify that i2c/c2i adapters are called properly") \ 921 \ 922 develop(bool, VerifyAdapterSharing, false, \ 923 "Verify that the code for shared adapters is the equivalent") \ 924 \ 925 diagnostic(bool, PrintAssembly, false, \ 926 "Print assembly code (using external disassembler.so)") \ 927 \ 928 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 929 "Options string passed to disassembler.so") \ 930 \ 931 diagnostic(bool, PrintNMethods, false, \ 932 "Print assembly code for nmethods when generated") \ 933 \ 934 diagnostic(bool, PrintNativeNMethods, false, \ 935 "Print assembly code for native nmethods when generated") \ 936 \ 937 develop(bool, PrintDebugInfo, false, \ 938 "Print debug information for all nmethods when generated") \ 939 \ 940 develop(bool, PrintRelocations, false, \ 941 "Print relocation information for all nmethods when generated") \ 942 \ 943 develop(bool, PrintDependencies, false, \ 944 "Print dependency information for all nmethods when generated") \ 945 \ 946 develop(bool, PrintExceptionHandlers, false, \ 947 "Print exception handler tables for all nmethods when generated") \ 948 \ 949 develop(bool, StressCompiledExceptionHandlers, false, \ 950 "Exercise compiled exception handlers") \ 951 \ 952 develop(bool, InterceptOSException, false, \ 953 "Starts debugger when an implicit OS (e.g., NULL) " \ 954 "exception happens") \ 955 \ 956 product(bool, PrintCodeCache, false, \ 957 "Print the code cache memory usage when exiting") \ 958 \ 959 develop(bool, PrintCodeCache2, false, \ 960 "Print detailed usage info on the code cache when exiting") \ 961 \ 962 product(bool, PrintCodeCacheOnCompilation, false, \ 963 "Print the code cache memory usage each time a method is compiled") \ 964 \ 965 diagnostic(bool, PrintStubCode, false, \ 966 "Print generated stub code") \ 967 \ 968 product(bool, StackTraceInThrowable, true, \ 969 "Collect backtrace in throwable when exception happens") \ 970 \ 971 product(bool, OmitStackTraceInFastThrow, true, \ 972 "Omit backtraces for some 'hot' exceptions in optimized code") \ 973 \ 974 product(bool, ProfilerPrintByteCodeStatistics, false, \ 975 "Prints byte code statictics when dumping profiler output") \ 976 \ 977 product(bool, ProfilerRecordPC, false, \ 978 "Collects tick for each 16 byte interval of compiled code") \ 979 \ 980 product(bool, ProfileVM, false, \ 981 "Profiles ticks that fall within VM (either in the VM Thread " \ 982 "or VM code called through stubs)") \ 983 \ 984 product(bool, ProfileIntervals, false, \ 985 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 986 \ 987 notproduct(bool, ProfilerCheckIntervals, false, \ 988 "Collect and print info on spacing of profiler ticks") \ 989 \ 990 develop(bool, PrintJVMWarnings, false, \ 991 "Prints warnings for unimplemented JVM functions") \ 992 \ 993 product(bool, PrintWarnings, true, \ 994 "Prints JVM warnings to output stream") \ 995 \ 996 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 997 "Prints warnings for stalled SpinLocks") \ 998 \ 999 product(bool, RegisterFinalizersAtInit, true, \ 1000 "Register finalizable objects at end of Object.<init> or " \ 1001 "after allocation") \ 1002 \ 1003 develop(bool, RegisterReferences, true, \ 1004 "Tells whether the VM should register soft/weak/final/phantom " \ 1005 "references") \ 1006 \ 1007 develop(bool, IgnoreRewrites, false, \ 1008 "Supress rewrites of bytecodes in the oopmap generator. " \ 1009 "This is unsafe!") \ 1010 \ 1011 develop(bool, PrintCodeCacheExtension, false, \ 1012 "Print extension of code cache") \ 1013 \ 1014 develop(bool, UsePrivilegedStack, true, \ 1015 "Enable the security JVM functions") \ 1016 \ 1017 develop(bool, ProtectionDomainVerification, true, \ 1018 "Verifies protection domain before resolution in system " \ 1019 "dictionary") \ 1020 \ 1021 product(bool, ClassUnloading, true, \ 1022 "Do unloading of classes") \ 1023 \ 1024 develop(bool, DisableStartThread, false, \ 1025 "Disable starting of additional Java threads " \ 1026 "(for debugging only)") \ 1027 \ 1028 develop(bool, MemProfiling, false, \ 1029 "Write memory usage profiling to log file") \ 1030 \ 1031 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1032 "Prints the system dictionary at exit") \ 1033 \ 1034 experimental(intx, PredictedLoadedClassCount, 0, \ 1035 "Experimental: Tune loaded class cache starting size.") \ 1036 \ 1037 diagnostic(bool, UnsyncloadClass, false, \ 1038 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1039 "class loader must call VM synchronized for findClass " \ 1040 "and defineClass.") \ 1041 \ 1042 product(bool, AlwaysLockClassLoader, false, \ 1043 "Require the VM to acquire the class loader lock before calling " \ 1044 "loadClass() even for class loaders registering " \ 1045 "as parallel capable") \ 1046 \ 1047 product(bool, AllowParallelDefineClass, false, \ 1048 "Allow parallel defineClass requests for class loaders " \ 1049 "registering as parallel capable") \ 1050 \ 1051 product(bool, MustCallLoadClassInternal, false, \ 1052 "Call loadClassInternal() rather than loadClass()") \ 1053 \ 1054 product_pd(bool, DontYieldALot, \ 1055 "Throw away obvious excess yield calls (for SOLARIS only)") \ 1056 \ 1057 product_pd(bool, ConvertSleepToYield, \ 1058 "Converts sleep(0) to thread yield " \ 1059 "(may be off for SOLARIS to improve GUI)") \ 1060 \ 1061 product(bool, ConvertYieldToSleep, false, \ 1062 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 1063 "behavior (SOLARIS only)") \ 1064 \ 1065 product(bool, UseBoundThreads, true, \ 1066 "Bind user level threads to kernel threads (for SOLARIS only)") \ 1067 \ 1068 develop(bool, UseDetachedThreads, true, \ 1069 "Use detached threads that are recycled upon termination " \ 1070 "(for SOLARIS only)") \ 1071 \ 1072 product(bool, UseLWPSynchronization, true, \ 1073 "Use LWP-based instead of libthread-based synchronization " \ 1074 "(SPARC only)") \ 1075 \ 1076 product(ccstr, SyncKnobs, NULL, \ 1077 "(Unstable) Various monitor synchronization tunables") \ 1078 \ 1079 product(intx, EmitSync, 0, \ 1080 "(Unsafe,Unstable) " \ 1081 " Controls emission of inline sync fast-path code") \ 1082 \ 1083 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1084 \ 1085 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1086 \ 1087 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 1088 \ 1089 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 1090 \ 1091 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 1092 \ 1093 product(intx, hashCode, 5, \ 1094 "(Unstable) select hashCode generation algorithm" ) \ 1095 \ 1096 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1097 "(Unstable, Linux-specific)" \ 1098 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 1099 \ 1100 product(bool, FilterSpuriousWakeups, true, \ 1101 "Prevent spurious or premature wakeups from object.wait " \ 1102 "(Solaris only)") \ 1103 \ 1104 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1105 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1106 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1107 \ 1108 develop(bool, UsePthreads, false, \ 1109 "Use pthread-based instead of libthread-based synchronization " \ 1110 "(SPARC only)") \ 1111 \ 1112 product(bool, AdjustConcurrency, false, \ 1113 "call thr_setconcurrency at thread create time to avoid " \ 1114 "LWP starvation on MP systems (For Solaris Only)") \ 1115 \ 1116 product(bool, ReduceSignalUsage, false, \ 1117 "Reduce the use of OS signals in Java and/or the VM") \ 1118 \ 1119 develop_pd(bool, ShareVtableStubs, \ 1120 "Share vtable stubs (smaller code but worse branch prediction") \ 1121 \ 1122 develop(bool, LoadLineNumberTables, true, \ 1123 "Tells whether the class file parser loads line number tables") \ 1124 \ 1125 develop(bool, LoadLocalVariableTables, true, \ 1126 "Tells whether the class file parser loads local variable tables")\ 1127 \ 1128 develop(bool, LoadLocalVariableTypeTables, true, \ 1129 "Tells whether the class file parser loads local variable type tables")\ 1130 \ 1131 product(bool, AllowUserSignalHandlers, false, \ 1132 "Do not complain if the application installs signal handlers " \ 1133 "(Solaris & Linux only)") \ 1134 \ 1135 product(bool, UseSignalChaining, true, \ 1136 "Use signal-chaining to invoke signal handlers installed " \ 1137 "by the application (Solaris & Linux only)") \ 1138 \ 1139 product(bool, UseAltSigs, false, \ 1140 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1141 "internal signals (Solaris only)") \ 1142 \ 1143 product(bool, AllowJNIEnvProxy, false, \ 1144 "Allow JNIEnv proxies for jdbx") \ 1145 \ 1146 product(bool, JNIDetachReleasesMonitors, true, \ 1147 "JNI DetachCurrentThread releases monitors owned by thread") \ 1148 \ 1149 product(bool, RestoreMXCSROnJNICalls, false, \ 1150 "Restore MXCSR when returning from JNI calls") \ 1151 \ 1152 product(bool, CheckJNICalls, false, \ 1153 "Verify all arguments to JNI calls") \ 1154 \ 1155 product(bool, UseFastJNIAccessors, true, \ 1156 "Use optimized versions of Get<Primitive>Field") \ 1157 \ 1158 product(bool, EagerXrunInit, false, \ 1159 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1160 " but not all -Xrun libraries may support the state of the VM at this time") \ 1161 \ 1162 product(bool, PreserveAllAnnotations, false, \ 1163 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1164 \ 1165 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1166 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1167 \ 1168 product(bool, LazyBootClassLoader, true, \ 1169 "Enable/disable lazy opening of boot class path entries") \ 1170 \ 1171 product(bool, UseXMMForArrayCopy, false, \ 1172 "Use SSE2 MOVQ instruction for Arraycopy") \ 1173 \ 1174 product(intx, FieldsAllocationStyle, 1, \ 1175 "0 - type based with oops first, 1 - with oops last, " \ 1176 "2 - oops in super and sub classes are together") \ 1177 \ 1178 product(bool, CompactFields, true, \ 1179 "Allocate nonstatic fields in gaps between previous fields") \ 1180 \ 1181 notproduct(bool, PrintFieldLayout, false, \ 1182 "Print field layout for each class") \ 1183 \ 1184 product(intx, ContendedPaddingWidth, 128, \ 1185 "How many bytes to pad the fields/classes marked @Contended with")\ 1186 \ 1187 product(bool, EnableContended, true, \ 1188 "Enable @Contended annotation support") \ 1189 \ 1190 product(bool, RestrictContended, true, \ 1191 "Restrict @Contended to trusted classes") \ 1192 \ 1193 product(bool, UseBiasedLocking, true, \ 1194 "Enable biased locking in JVM") \ 1195 \ 1196 product(intx, BiasedLockingStartupDelay, 4000, \ 1197 "Number of milliseconds to wait before enabling biased locking") \ 1198 \ 1199 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1200 "Print statistics of biased locking in JVM") \ 1201 \ 1202 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1203 "Threshold of number of revocations per type to try to " \ 1204 "rebias all objects in the heap of that type") \ 1205 \ 1206 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1207 "Threshold of number of revocations per type to permanently " \ 1208 "revoke biases of all objects in the heap of that type") \ 1209 \ 1210 product(intx, BiasedLockingDecayTime, 25000, \ 1211 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1212 "type after previous bulk rebias") \ 1213 \ 1214 /* tracing */ \ 1215 \ 1216 notproduct(bool, TraceRuntimeCalls, false, \ 1217 "Trace run-time calls") \ 1218 \ 1219 develop(bool, TraceJNICalls, false, \ 1220 "Trace JNI calls") \ 1221 \ 1222 notproduct(bool, TraceJVMCalls, false, \ 1223 "Trace JVM calls") \ 1224 \ 1225 product(ccstr, TraceJVMTI, NULL, \ 1226 "Trace flags for JVMTI functions and events") \ 1227 \ 1228 /* This option can change an EMCP method into an obsolete method. */ \ 1229 /* This can affect tests that except specific methods to be EMCP. */ \ 1230 /* This option should be used with caution. */ \ 1231 product(bool, StressLdcRewrite, false, \ 1232 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1233 \ 1234 product(intx, TraceRedefineClasses, 0, \ 1235 "Trace level for JVMTI RedefineClasses") \ 1236 \ 1237 develop(bool, StressMethodComparator, false, \ 1238 "run the MethodComparator on all loaded methods") \ 1239 \ 1240 /* change to false by default sometime after Mustang */ \ 1241 product(bool, VerifyMergedCPBytecodes, true, \ 1242 "Verify bytecodes after RedefineClasses constant pool merging") \ 1243 \ 1244 develop(bool, TraceJNIHandleAllocation, false, \ 1245 "Trace allocation/deallocation of JNI handle blocks") \ 1246 \ 1247 develop(bool, TraceThreadEvents, false, \ 1248 "Trace all thread events") \ 1249 \ 1250 develop(bool, TraceBytecodes, false, \ 1251 "Trace bytecode execution") \ 1252 \ 1253 develop(bool, TraceClassInitialization, false, \ 1254 "Trace class initialization") \ 1255 \ 1256 develop(bool, TraceExceptions, false, \ 1257 "Trace exceptions") \ 1258 \ 1259 develop(bool, TraceICs, false, \ 1260 "Trace inline cache changes") \ 1261 \ 1262 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1263 "Trace method invocation counter overflow") \ 1264 \ 1265 develop(bool, TraceInlineCacheClearing, false, \ 1266 "Trace clearing of inline caches in nmethods") \ 1267 \ 1268 develop(bool, TraceDependencies, false, \ 1269 "Trace dependencies") \ 1270 \ 1271 develop(bool, VerifyDependencies, trueInDebug, \ 1272 "Exercise and verify the compilation dependency mechanism") \ 1273 \ 1274 develop(bool, TraceNewOopMapGeneration, false, \ 1275 "Trace OopMapGeneration") \ 1276 \ 1277 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1278 "Trace OopMapGeneration: print detailed cell states") \ 1279 \ 1280 develop(bool, TimeOopMap, false, \ 1281 "Time calls to GenerateOopMap::compute_map() in sum") \ 1282 \ 1283 develop(bool, TimeOopMap2, false, \ 1284 "Time calls to GenerateOopMap::compute_map() individually") \ 1285 \ 1286 develop(bool, TraceMonitorMismatch, false, \ 1287 "Trace monitor matching failures during OopMapGeneration") \ 1288 \ 1289 develop(bool, TraceOopMapRewrites, false, \ 1290 "Trace rewritting of method oops during oop map generation") \ 1291 \ 1292 develop(bool, TraceSafepoint, false, \ 1293 "Trace safepoint operations") \ 1294 \ 1295 develop(bool, TraceICBuffer, false, \ 1296 "Trace usage of IC buffer") \ 1297 \ 1298 develop(bool, TraceCompiledIC, false, \ 1299 "Trace changes of compiled IC") \ 1300 \ 1301 notproduct(bool, TraceZapDeadLocals, false, \ 1302 "Trace zapping dead locals") \ 1303 \ 1304 develop(bool, TraceStartupTime, false, \ 1305 "Trace setup time") \ 1306 \ 1307 develop(bool, TraceProtectionDomainVerification, false, \ 1308 "Trace protection domain verifcation") \ 1309 \ 1310 develop(bool, TraceClearedExceptions, false, \ 1311 "Prints when an exception is forcibly cleared") \ 1312 \ 1313 product(bool, TraceClassResolution, false, \ 1314 "Trace all constant pool resolutions (for debugging)") \ 1315 \ 1316 product(bool, TraceBiasedLocking, false, \ 1317 "Trace biased locking in JVM") \ 1318 \ 1319 product(bool, TraceMonitorInflation, false, \ 1320 "Trace monitor inflation in JVM") \ 1321 \ 1322 /* gc */ \ 1323 \ 1324 product(bool, UseSerialGC, false, \ 1325 "Use the serial garbage collector") \ 1326 \ 1327 product(bool, UseG1GC, false, \ 1328 "Use the Garbage-First garbage collector") \ 1329 \ 1330 product(bool, UseParallelGC, false, \ 1331 "Use the Parallel Scavenge garbage collector") \ 1332 \ 1333 product(bool, UseParallelOldGC, false, \ 1334 "Use the Parallel Old garbage collector") \ 1335 \ 1336 product(uintx, HeapMaximumCompactionInterval, 20, \ 1337 "How often should we maximally compact the heap (not allowing " \ 1338 "any dead space)") \ 1339 \ 1340 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1341 "The collection count for the first maximum compaction") \ 1342 \ 1343 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1344 "In the Parallel Old garbage collector maximum compaction for " \ 1345 "a system GC") \ 1346 \ 1347 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1348 "The mean used by the par compact dead wood" \ 1349 "limiter (a number between 0-100).") \ 1350 \ 1351 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1352 "The standard deviation used by the par compact dead wood" \ 1353 "limiter (a number between 0-100).") \ 1354 \ 1355 product(uintx, ParallelGCThreads, 0, \ 1356 "Number of parallel threads parallel gc will use") \ 1357 \ 1358 product(bool, UseDynamicNumberOfGCThreads, false, \ 1359 "Dynamically choose the number of parallel threads " \ 1360 "parallel gc will use") \ 1361 \ 1362 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1363 "Force dynamic selection of the number of" \ 1364 "parallel threads parallel gc will use to aid debugging") \ 1365 \ 1366 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1367 "Size of heap (bytes) per GC thread used in calculating the " \ 1368 "number of GC threads") \ 1369 \ 1370 product(bool, TraceDynamicGCThreads, false, \ 1371 "Trace the dynamic GC thread usage") \ 1372 \ 1373 develop(bool, ParallelOldGCSplitALot, false, \ 1374 "Provoke splitting (copying data from a young gen space to" \ 1375 "multiple destination spaces)") \ 1376 \ 1377 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1378 "How often to provoke splitting a young gen space") \ 1379 \ 1380 product(uintx, ConcGCThreads, 0, \ 1381 "Number of threads concurrent gc will use") \ 1382 \ 1383 product(uintx, YoungPLABSize, 4096, \ 1384 "Size of young gen promotion labs (in HeapWords)") \ 1385 \ 1386 product(uintx, OldPLABSize, 1024, \ 1387 "Size of old gen promotion labs (in HeapWords)") \ 1388 \ 1389 product(uintx, GCTaskTimeStampEntries, 200, \ 1390 "Number of time stamp entries per gc worker thread") \ 1391 \ 1392 product(bool, AlwaysTenure, false, \ 1393 "Always tenure objects in eden. (ParallelGC only)") \ 1394 \ 1395 product(bool, NeverTenure, false, \ 1396 "Never tenure objects in eden, May tenure on overflow " \ 1397 "(ParallelGC only)") \ 1398 \ 1399 product(bool, ScavengeBeforeFullGC, true, \ 1400 "Scavenge youngest generation before each full GC, " \ 1401 "used with UseParallelGC") \ 1402 \ 1403 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1404 "Allow scavenges to occur when to_space contains objects.") \ 1405 \ 1406 product(bool, UseConcMarkSweepGC, false, \ 1407 "Use Concurrent Mark-Sweep GC in the old generation") \ 1408 \ 1409 product(bool, ExplicitGCInvokesConcurrent, false, \ 1410 "A System.gc() request invokes a concurrent collection;" \ 1411 " (effective only when UseConcMarkSweepGC)") \ 1412 \ 1413 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1414 "A System.gc() request invokes a concurrent collection and " \ 1415 "also unloads classes during such a concurrent gc cycle " \ 1416 "(effective only when UseConcMarkSweepGC)") \ 1417 \ 1418 product(bool, GCLockerInvokesConcurrent, false, \ 1419 "The exit of a JNI CS necessitating a scavenge also" \ 1420 " kicks off a bkgrd concurrent collection") \ 1421 \ 1422 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1423 "How much the GC can expand the eden by while the GC locker " \ 1424 "is active (as a percentage)") \ 1425 \ 1426 diagnostic(intx, GCLockerRetryAllocationCount, 2, \ 1427 "Number of times to retry allocations when" \ 1428 " blocked by the GC locker") \ 1429 \ 1430 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1431 "Use Adaptive Free Lists in the CMS generation") \ 1432 \ 1433 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1434 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1435 \ 1436 develop(bool, RotateCMSCollectionTypes, false, \ 1437 "Rotate the CMS collections among concurrent and STW") \ 1438 \ 1439 product(bool, UseCMSBestFit, true, \ 1440 "Use CMS best fit allocation strategy") \ 1441 \ 1442 product(bool, UseCMSCollectionPassing, true, \ 1443 "Use passing of collection from background to foreground") \ 1444 \ 1445 product(bool, UseParNewGC, false, \ 1446 "Use parallel threads in the new generation.") \ 1447 \ 1448 product(bool, ParallelGCVerbose, false, \ 1449 "Verbose output for parallel GC.") \ 1450 \ 1451 product(uintx, ParallelGCBufferWastePct, 10, \ 1452 "Wasted fraction of parallel allocation buffer.") \ 1453 \ 1454 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1455 "Retain parallel allocation buffers across scavenges; " \ 1456 " -- disabled because this currently conflicts with " \ 1457 " parallel card scanning under certain conditions ") \ 1458 \ 1459 product(uintx, TargetPLABWastePct, 10, \ 1460 "Target wasted space in last buffer as percent of overall " \ 1461 "allocation") \ 1462 \ 1463 product(uintx, PLABWeight, 75, \ 1464 "Percentage (0-100) used to weight the current sample when" \ 1465 "computing exponentially decaying average for ResizePLAB.") \ 1466 \ 1467 product(bool, ResizePLAB, true, \ 1468 "Dynamically resize (survivor space) promotion labs") \ 1469 \ 1470 product(bool, PrintPLAB, false, \ 1471 "Print (survivor space) promotion labs sizing decisions") \ 1472 \ 1473 product(intx, ParGCArrayScanChunk, 50, \ 1474 "Scan a subset and push remainder, if array is bigger than this") \ 1475 \ 1476 product(bool, ParGCUseLocalOverflow, false, \ 1477 "Instead of a global overflow list, use local overflow stacks") \ 1478 \ 1479 product(bool, ParGCTrimOverflow, true, \ 1480 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1481 \ 1482 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1483 "Whether we should simulate work queue overflow in ParNew") \ 1484 \ 1485 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1486 "An `interval' counter that determines how frequently " \ 1487 "we simulate overflow; a smaller number increases frequency") \ 1488 \ 1489 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1490 "The desired number of objects to claim from the overflow list") \ 1491 \ 1492 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1493 "The number of strides per worker thread that we divide up the " \ 1494 "card table scanning work into") \ 1495 \ 1496 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1497 "The number of cards in each chunk of the parallel chunks used " \ 1498 "during card table scanning") \ 1499 \ 1500 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1501 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1502 "parallel GC.") \ 1503 \ 1504 product(uintx, OldPLABWeight, 50, \ 1505 "Percentage (0-100) used to weight the current sample when" \ 1506 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 1507 \ 1508 product(bool, ResizeOldPLAB, true, \ 1509 "Dynamically resize (old gen) promotion labs") \ 1510 \ 1511 product(bool, PrintOldPLAB, false, \ 1512 "Print (old gen) promotion labs sizing decisions") \ 1513 \ 1514 product(uintx, CMSOldPLABMin, 16, \ 1515 "Min size of CMS gen promotion lab caches per worker per blksize")\ 1516 \ 1517 product(uintx, CMSOldPLABMax, 1024, \ 1518 "Max size of CMS gen promotion lab caches per worker per blksize")\ 1519 \ 1520 product(uintx, CMSOldPLABNumRefills, 4, \ 1521 "Nominal number of refills of CMS gen promotion lab cache" \ 1522 " per worker per block size") \ 1523 \ 1524 product(bool, CMSOldPLABResizeQuicker, false, \ 1525 "Whether to react on-the-fly during a scavenge to a sudden" \ 1526 " change in block demand rate") \ 1527 \ 1528 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1529 "The tolerance of the phase-change detector for on-the-fly" \ 1530 " PLAB resizing during a scavenge") \ 1531 \ 1532 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1533 "The gain in the feedback loop for on-the-fly PLAB resizing" \ 1534 " during a scavenge") \ 1535 \ 1536 product(bool, AlwaysPreTouch, false, \ 1537 "It forces all freshly committed pages to be pre-touched.") \ 1538 \ 1539 product_pd(uintx, CMSYoungGenPerWorker, \ 1540 "The maximum size of young gen chosen by default per GC worker " \ 1541 "thread available") \ 1542 \ 1543 product(bool, CMSIncrementalMode, false, \ 1544 "Whether CMS GC should operate in \"incremental\" mode") \ 1545 \ 1546 product(uintx, CMSIncrementalDutyCycle, 10, \ 1547 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1548 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1549 "value") \ 1550 \ 1551 product(bool, CMSIncrementalPacing, true, \ 1552 "Whether the CMS incremental mode duty cycle should be " \ 1553 "automatically adjusted") \ 1554 \ 1555 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1556 "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1557 "enabled (a percentage, 0-100)") \ 1558 \ 1559 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1560 "Percentage (0-100) used to add conservatism when computing the " \ 1561 "duty cycle") \ 1562 \ 1563 product(uintx, CMSIncrementalOffset, 0, \ 1564 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1565 " is shifted to the right within the period between young GCs") \ 1566 \ 1567 product(uintx, CMSExpAvgFactor, 50, \ 1568 "Percentage (0-100) used to weight the current sample when" \ 1569 "computing exponential averages for CMS statistics.") \ 1570 \ 1571 product(uintx, CMS_FLSWeight, 75, \ 1572 "Percentage (0-100) used to weight the current sample when" \ 1573 "computing exponentially decating averages for CMS FLS statistics.") \ 1574 \ 1575 product(uintx, CMS_FLSPadding, 1, \ 1576 "The multiple of deviation from mean to use for buffering" \ 1577 "against volatility in free list demand.") \ 1578 \ 1579 product(uintx, FLSCoalescePolicy, 2, \ 1580 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1581 \ 1582 product(bool, FLSAlwaysCoalesceLarge, false, \ 1583 "CMS: Larger free blocks are always available for coalescing") \ 1584 \ 1585 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1586 "CMS: the smaller the percentage the greater the coalition force")\ 1587 \ 1588 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1589 "CMS: the factor by which to inflate estimated demand of small" \ 1590 " block sizes to prevent coalescing with an adjoining block") \ 1591 \ 1592 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1593 "CMS: the factor by which to inflate estimated demand of large" \ 1594 " block sizes to prevent coalescing with an adjoining block") \ 1595 \ 1596 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1597 "CMS: the factor by which to inflate estimated demand of small" \ 1598 " block sizes to prevent splitting to supply demand for smaller" \ 1599 " blocks") \ 1600 \ 1601 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1602 "CMS: the factor by which to inflate estimated demand of large" \ 1603 " block sizes to prevent splitting to supply demand for smaller" \ 1604 " blocks") \ 1605 \ 1606 product(bool, CMSExtrapolateSweep, false, \ 1607 "CMS: cushion for block demand during sweep") \ 1608 \ 1609 product(uintx, CMS_SweepWeight, 75, \ 1610 "Percentage (0-100) used to weight the current sample when " \ 1611 "computing exponentially decaying average for inter-sweep " \ 1612 "duration") \ 1613 \ 1614 product(uintx, CMS_SweepPadding, 1, \ 1615 "The multiple of deviation from mean to use for buffering " \ 1616 "against volatility in inter-sweep duration.") \ 1617 \ 1618 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1619 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1620 "duration exceeds this threhold in milliseconds") \ 1621 \ 1622 develop(bool, CMSTraceIncrementalMode, false, \ 1623 "Trace CMS incremental mode") \ 1624 \ 1625 develop(bool, CMSTraceIncrementalPacing, false, \ 1626 "Trace CMS incremental mode pacing computation") \ 1627 \ 1628 develop(bool, CMSTraceThreadState, false, \ 1629 "Trace the CMS thread state (enable the trace_state() method)") \ 1630 \ 1631 product(bool, CMSClassUnloadingEnabled, true, \ 1632 "Whether class unloading enabled when using CMS GC") \ 1633 \ 1634 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1635 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1636 " for which classes may not be unloaded") \ 1637 \ 1638 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1639 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1640 \ 1641 product(bool, UseCMSCompactAtFullCollection, true, \ 1642 "Use mark sweep compact at full collections") \ 1643 \ 1644 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1645 "Number of CMS full collection done before compaction if > 0") \ 1646 \ 1647 develop(intx, CMSDictionaryChoice, 0, \ 1648 "Use BinaryTreeDictionary as default in the CMS generation") \ 1649 \ 1650 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1651 "Replenish an indexed free list with this number of chunks") \ 1652 \ 1653 product(bool, CMSReplenishIntermediate, true, \ 1654 "Replenish all intermediate free-list caches") \ 1655 \ 1656 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1657 "When satisfying batched demand, split blocks from the " \ 1658 "IndexedFreeList whose size is a multiple of requested size") \ 1659 \ 1660 product(bool, CMSLoopWarn, false, \ 1661 "Warn in case of excessive CMS looping") \ 1662 \ 1663 develop(bool, CMSOverflowEarlyRestoration, false, \ 1664 "Whether preserved marks should be restored early") \ 1665 \ 1666 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1667 "Size of marking stack") \ 1668 \ 1669 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1670 "Max size of marking stack") \ 1671 \ 1672 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1673 "Whether we should simulate frequent marking stack / work queue" \ 1674 " overflow") \ 1675 \ 1676 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1677 "An `interval' counter that determines how frequently" \ 1678 " we simulate overflow; a smaller number increases frequency") \ 1679 \ 1680 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1681 "(Temporary, subject to experimentation)" \ 1682 "Maximum number of abortable preclean iterations, if > 0") \ 1683 \ 1684 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1685 "(Temporary, subject to experimentation)" \ 1686 "Maximum time in abortable preclean in ms") \ 1687 \ 1688 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1689 "(Temporary, subject to experimentation)" \ 1690 "Nominal minimum work per abortable preclean iteration") \ 1691 \ 1692 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1693 "(Temporary, subject to experimentation)" \ 1694 " Time that we sleep between iterations when not given" \ 1695 " enough work per iteration") \ 1696 \ 1697 product(uintx, CMSRescanMultiple, 32, \ 1698 "Size (in cards) of CMS parallel rescan task") \ 1699 \ 1700 product(uintx, CMSConcMarkMultiple, 32, \ 1701 "Size (in cards) of CMS concurrent MT marking task") \ 1702 \ 1703 product(bool, CMSAbortSemantics, false, \ 1704 "Whether abort-on-overflow semantics is implemented") \ 1705 \ 1706 product(bool, CMSParallelInitialMarkEnabled, true, \ 1707 "Use the parallel initial mark.") \ 1708 \ 1709 product(bool, CMSParallelRemarkEnabled, true, \ 1710 "Whether parallel remark enabled (only if ParNewGC)") \ 1711 \ 1712 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1713 "Whether parallel remark of survivor space" \ 1714 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1715 \ 1716 product(bool, CMSPLABRecordAlways, true, \ 1717 "Whether to always record survivor space PLAB bdries" \ 1718 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1719 \ 1720 product(bool, CMSEdenChunksRecordAlways, true, \ 1721 "Whether to always record eden chunks used for " \ 1722 "the parallel initial mark or remark of eden" ) \ 1723 \ 1724 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1725 "Print the eden and the survivor chunks used for the parallel " \ 1726 "initial mark or remark of the eden/survivor spaces") \ 1727 \ 1728 product(bool, CMSConcurrentMTEnabled, true, \ 1729 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1730 \ 1731 product(bool, CMSPrecleaningEnabled, true, \ 1732 "Whether concurrent precleaning enabled") \ 1733 \ 1734 product(uintx, CMSPrecleanIter, 3, \ 1735 "Maximum number of precleaning iteration passes") \ 1736 \ 1737 product(uintx, CMSPrecleanNumerator, 2, \ 1738 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1739 " ratio") \ 1740 \ 1741 product(uintx, CMSPrecleanDenominator, 3, \ 1742 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1743 " ratio") \ 1744 \ 1745 product(bool, CMSPrecleanRefLists1, true, \ 1746 "Preclean ref lists during (initial) preclean phase") \ 1747 \ 1748 product(bool, CMSPrecleanRefLists2, false, \ 1749 "Preclean ref lists during abortable preclean phase") \ 1750 \ 1751 product(bool, CMSPrecleanSurvivors1, false, \ 1752 "Preclean survivors during (initial) preclean phase") \ 1753 \ 1754 product(bool, CMSPrecleanSurvivors2, true, \ 1755 "Preclean survivors during abortable preclean phase") \ 1756 \ 1757 product(uintx, CMSPrecleanThreshold, 1000, \ 1758 "Don't re-iterate if #dirty cards less than this") \ 1759 \ 1760 product(bool, CMSCleanOnEnter, true, \ 1761 "Clean-on-enter optimization for reducing number of dirty cards") \ 1762 \ 1763 product(uintx, CMSRemarkVerifyVariant, 1, \ 1764 "Choose variant (1,2) of verification following remark") \ 1765 \ 1766 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1767 "If Eden used is below this value, don't try to schedule remark") \ 1768 \ 1769 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1770 "The Eden occupancy % at which to try and schedule remark pause") \ 1771 \ 1772 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1773 "Start sampling Eden top at least before yg occupancy reaches" \ 1774 " 1/<ratio> of the size at which we plan to schedule remark") \ 1775 \ 1776 product(uintx, CMSSamplingGrain, 16*K, \ 1777 "The minimum distance between eden samples for CMS (see above)") \ 1778 \ 1779 product(bool, CMSScavengeBeforeRemark, false, \ 1780 "Attempt scavenge before the CMS remark step") \ 1781 \ 1782 develop(bool, CMSTraceSweeper, false, \ 1783 "Trace some actions of the CMS sweeper") \ 1784 \ 1785 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1786 "Don't drain below this size per parallel worker/thief") \ 1787 \ 1788 manageable(intx, CMSWaitDuration, 2000, \ 1789 "Time in milliseconds that CMS thread waits for young GC") \ 1790 \ 1791 develop(uintx, CMSCheckInterval, 1000, \ 1792 "Interval in milliseconds that CMS thread checks if it " \ 1793 "should start a collection cycle") \ 1794 \ 1795 product(bool, CMSYield, true, \ 1796 "Yield between steps of concurrent mark & sweep") \ 1797 \ 1798 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1799 "Bitmap operations should process at most this many bits" \ 1800 "between yields") \ 1801 \ 1802 product(bool, CMSDumpAtPromotionFailure, false, \ 1803 "Dump useful information about the state of the CMS old " \ 1804 " generation upon a promotion failure.") \ 1805 \ 1806 product(bool, CMSPrintChunksInDump, false, \ 1807 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1808 " more detailed information about the free chunks.") \ 1809 \ 1810 product(bool, CMSPrintObjectsInDump, false, \ 1811 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1812 " more detailed information about the allocated objects.") \ 1813 \ 1814 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1815 "Verify that all refs across the FLS boundary " \ 1816 " are to valid objects") \ 1817 \ 1818 diagnostic(bool, FLSVerifyLists, false, \ 1819 "Do lots of (expensive) FreeListSpace verification") \ 1820 \ 1821 diagnostic(bool, FLSVerifyIndexTable, false, \ 1822 "Do lots of (expensive) FLS index table verification") \ 1823 \ 1824 develop(bool, FLSVerifyDictionary, false, \ 1825 "Do lots of (expensive) FLS dictionary verification") \ 1826 \ 1827 develop(bool, VerifyBlockOffsetArray, false, \ 1828 "Do (expensive!) block offset array verification") \ 1829 \ 1830 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1831 "Maintain _unallocated_block in BlockOffsetArray" \ 1832 " (currently applicable only to CMS collector)") \ 1833 \ 1834 develop(bool, TraceCMSState, false, \ 1835 "Trace the state of the CMS collection") \ 1836 \ 1837 product(intx, RefDiscoveryPolicy, 0, \ 1838 "Whether reference-based(0) or referent-based(1)") \ 1839 \ 1840 product(bool, ParallelRefProcEnabled, false, \ 1841 "Enable parallel reference processing whenever possible") \ 1842 \ 1843 product(bool, ParallelRefProcBalancingEnabled, true, \ 1844 "Enable balancing of reference processing queues") \ 1845 \ 1846 product(uintx, CMSTriggerRatio, 80, \ 1847 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1848 "allocated before a CMS collection cycle commences") \ 1849 \ 1850 product(uintx, CMSBootstrapOccupancy, 50, \ 1851 "Percentage CMS generation occupancy at which to " \ 1852 "initiate CMS collection for bootstrapping collection stats") \ 1853 \ 1854 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1855 "Percentage CMS generation occupancy to start a CMS collection " \ 1856 "cycle. A negative value means that CMSTriggerRatio is used") \ 1857 \ 1858 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1859 "Percentage of the (entire) heap occupancy to start a " \ 1860 "concurrent GC cycle. It is used by GCs that trigger a " \ 1861 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1862 "not just one of the generations (e.g., G1). A value of 0 " \ 1863 "denotes 'do constant GC cycles'.") \ 1864 \ 1865 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1866 "Only use occupancy as a crierion for starting a CMS collection") \ 1867 \ 1868 product(uintx, CMSIsTooFullPercentage, 98, \ 1869 "An absolute ceiling above which CMS will always consider the " \ 1870 "unloading of classes when class unloading is enabled") \ 1871 \ 1872 develop(bool, CMSTestInFreeList, false, \ 1873 "Check if the coalesced range is already in the " \ 1874 "free lists as claimed") \ 1875 \ 1876 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1877 "Check that all the garbage collected was returned to the " \ 1878 "free lists.") \ 1879 \ 1880 notproduct(bool, ScavengeALot, false, \ 1881 "Force scavenge at every Nth exit from the runtime system " \ 1882 "(N=ScavengeALotInterval)") \ 1883 \ 1884 develop(bool, FullGCALot, false, \ 1885 "Force full gc at every Nth exit from the runtime system " \ 1886 "(N=FullGCALotInterval)") \ 1887 \ 1888 notproduct(bool, GCALotAtAllSafepoints, false, \ 1889 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1890 \ 1891 product(bool, PrintPromotionFailure, false, \ 1892 "Print additional diagnostic information following " \ 1893 " promotion failure") \ 1894 \ 1895 notproduct(bool, PromotionFailureALot, false, \ 1896 "Use promotion failure handling on every youngest generation " \ 1897 "collection") \ 1898 \ 1899 develop(uintx, PromotionFailureALotCount, 1000, \ 1900 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1901 "refill attempts (ParNew) or promotion attempts " \ 1902 "(other young collectors) ") \ 1903 \ 1904 develop(uintx, PromotionFailureALotInterval, 5, \ 1905 "Total collections between promotion failures alot") \ 1906 \ 1907 experimental(uintx, WorkStealingSleepMillis, 1, \ 1908 "Sleep time when sleep is used for yields") \ 1909 \ 1910 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1911 "Number of yields before a sleep is done during workstealing") \ 1912 \ 1913 experimental(uintx, WorkStealingHardSpins, 4096, \ 1914 "Number of iterations in a spin loop between checks on " \ 1915 "time out of hard spin") \ 1916 \ 1917 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1918 "Ratio of hard spins to calls to yield") \ 1919 \ 1920 develop(uintx, ObjArrayMarkingStride, 512, \ 1921 "Number of ObjArray elements to push onto the marking stack" \ 1922 "before pushing a continuation entry") \ 1923 \ 1924 develop(bool, MetadataAllocationFailALot, false, \ 1925 "Fail metadata allocations at intervals controlled by " \ 1926 "MetadataAllocationFailALotInterval") \ 1927 \ 1928 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1929 "metadata allocation failure alot interval") \ 1930 \ 1931 develop(bool, MetaDataDeallocateALot, false, \ 1932 "Deallocation bunches of metadata at intervals controlled by " \ 1933 "MetaDataAllocateALotInterval") \ 1934 \ 1935 develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1936 "Metadata deallocation alot interval") \ 1937 \ 1938 develop(bool, TraceMetadataChunkAllocation, false, \ 1939 "Trace chunk metadata allocations") \ 1940 \ 1941 product(bool, TraceMetadataHumongousAllocation, false, \ 1942 "Trace humongous metadata allocations") \ 1943 \ 1944 develop(bool, TraceMetavirtualspaceAllocation, false, \ 1945 "Trace virtual space metadata allocations") \ 1946 \ 1947 notproduct(bool, ExecuteInternalVMTests, false, \ 1948 "Enable execution of internal VM tests.") \ 1949 \ 1950 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1951 \ 1952 product_pd(bool, ResizeTLAB, \ 1953 "Dynamically resize tlab size for threads") \ 1954 \ 1955 product(bool, ZeroTLAB, false, \ 1956 "Zero out the newly created TLAB") \ 1957 \ 1958 product(bool, FastTLABRefill, true, \ 1959 "Use fast TLAB refill code") \ 1960 \ 1961 product(bool, PrintTLAB, false, \ 1962 "Print various TLAB related information") \ 1963 \ 1964 product(bool, TLABStats, true, \ 1965 "Print various TLAB related information") \ 1966 \ 1967 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1968 "Enable LowMemoryProtection")) \ 1969 \ 1970 product_pd(bool, NeverActAsServerClassMachine, \ 1971 "Never act like a server-class machine") \ 1972 \ 1973 product(bool, AlwaysActAsServerClassMachine, false, \ 1974 "Always act like a server-class machine") \ 1975 \ 1976 product_pd(uint64_t, MaxRAM, \ 1977 "Real memory size (in bytes) used to set maximum heap size") \ 1978 \ 1979 product(uintx, ErgoHeapSizeLimit, 0, \ 1980 "Maximum ergonomically set heap size (in bytes); zero means use " \ 1981 "MaxRAM / MaxRAMFraction") \ 1982 \ 1983 product(uintx, MaxRAMFraction, 4, \ 1984 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1985 "size") \ 1986 \ 1987 product(uintx, DefaultMaxRAMFraction, 4, \ 1988 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1989 "size; deprecated: to be renamed to MaxRAMFraction") \ 1990 \ 1991 product(uintx, MinRAMFraction, 2, \ 1992 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 1993 "size on systems with small physical memory size") \ 1994 \ 1995 product(uintx, InitialRAMFraction, 64, \ 1996 "Fraction (1/n) of real memory used for initial heap size") \ 1997 \ 1998 develop(uintx, MaxVirtMemFraction, 2, \ 1999 "Maximum fraction (1/n) of virtual memory used for ergonomically" \ 2000 "determining maximum heap size") \ 2001 \ 2002 product(bool, UseAutoGCSelectPolicy, false, \ 2003 "Use automatic collection selection policy") \ 2004 \ 2005 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2006 "Automatic GC selection pause threshhold in ms") \ 2007 \ 2008 product(bool, UseAdaptiveSizePolicy, true, \ 2009 "Use adaptive generation sizing policies") \ 2010 \ 2011 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2012 "Use adaptive survivor sizing policies") \ 2013 \ 2014 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2015 "Use adaptive young-old sizing policies at minor collections") \ 2016 \ 2017 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2018 "Use adaptive young-old sizing policies at major collections") \ 2019 \ 2020 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2021 "Use statistics from System.GC for adaptive size policy") \ 2022 \ 2023 product(bool, UseAdaptiveGCBoundary, false, \ 2024 "Allow young-old boundary to move") \ 2025 \ 2026 develop(bool, TraceAdaptiveGCBoundary, false, \ 2027 "Trace young-old boundary moves") \ 2028 \ 2029 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2030 "Resize the virtual spaces of the young or old generations") \ 2031 \ 2032 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2033 "Policy for changeing generation size for throughput goals") \ 2034 \ 2035 product(uintx, AdaptiveSizePausePolicy, 0, \ 2036 "Policy for changing generation size for pause goals") \ 2037 \ 2038 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2039 "Adjust tenured generation to achive a minor pause goal") \ 2040 \ 2041 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2042 "Adjust young generation to achive a major pause goal") \ 2043 \ 2044 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2045 "Number of steps where heuristics is used before data is used") \ 2046 \ 2047 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2048 "Number of collections before the adaptive sizing is started") \ 2049 \ 2050 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2051 "Collection interval for printing information; zero means never") \ 2052 \ 2053 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2054 "Use adaptive minimum footprint as a goal") \ 2055 \ 2056 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2057 "Weight given to exponential resizing, between 0 and 100") \ 2058 \ 2059 product(uintx, AdaptiveTimeWeight, 25, \ 2060 "Weight given to time in adaptive policy, between 0 and 100") \ 2061 \ 2062 product(uintx, PausePadding, 1, \ 2063 "How much buffer to keep for pause time") \ 2064 \ 2065 product(uintx, PromotedPadding, 3, \ 2066 "How much buffer to keep for promotion failure") \ 2067 \ 2068 product(uintx, SurvivorPadding, 3, \ 2069 "How much buffer to keep for survivor overflow") \ 2070 \ 2071 product(uintx, ThresholdTolerance, 10, \ 2072 "Allowed collection cost difference between generations") \ 2073 \ 2074 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2075 "If collection costs are within margin, reduce both by full " \ 2076 "delta") \ 2077 \ 2078 product(uintx, YoungGenerationSizeIncrement, 20, \ 2079 "Adaptive size percentage change in young generation") \ 2080 \ 2081 product(uintx, YoungGenerationSizeSupplement, 80, \ 2082 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2083 \ 2084 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2085 "Decay factor to YoungedGenerationSizeSupplement") \ 2086 \ 2087 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2088 "Adaptive size percentage change in tenured generation") \ 2089 \ 2090 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2091 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2092 \ 2093 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2094 "Decay factor to TenuredGenerationSizeIncrement") \ 2095 \ 2096 product(uintx, MaxGCPauseMillis, max_uintx, \ 2097 "Adaptive size policy maximum GC pause time goal in msec, " \ 2098 "or (G1 Only) the max. GC time per MMU time slice") \ 2099 \ 2100 product(uintx, GCPauseIntervalMillis, 0, \ 2101 "Time slice for MMU specification") \ 2102 \ 2103 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2104 "Adaptive size policy maximum GC minor pause time goal in msec") \ 2105 \ 2106 product(uintx, GCTimeRatio, 99, \ 2107 "Adaptive size policy application time to GC time ratio") \ 2108 \ 2109 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2110 "Adaptive size scale down factor for shrinking") \ 2111 \ 2112 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2113 "Adaptive size decays the major cost for long major intervals") \ 2114 \ 2115 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2116 "Time scale over which major costs decay") \ 2117 \ 2118 product(uintx, MinSurvivorRatio, 3, \ 2119 "Minimum ratio of young generation/survivor space size") \ 2120 \ 2121 product(uintx, InitialSurvivorRatio, 8, \ 2122 "Initial ratio of eden/survivor space size") \ 2123 \ 2124 product(uintx, BaseFootPrintEstimate, 256*M, \ 2125 "Estimate of footprint other than Java Heap") \ 2126 \ 2127 product(bool, UseGCOverheadLimit, true, \ 2128 "Use policy to limit of proportion of time spent in GC " \ 2129 "before an OutOfMemory error is thrown") \ 2130 \ 2131 product(uintx, GCTimeLimit, 98, \ 2132 "Limit of proportion of time spent in GC before an OutOfMemory" \ 2133 "error is thrown (used with GCHeapFreeLimit)") \ 2134 \ 2135 product(uintx, GCHeapFreeLimit, 2, \ 2136 "Minimum percentage of free space after a full GC before an " \ 2137 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2138 \ 2139 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2140 "Number of consecutive collections before gc time limit fires") \ 2141 \ 2142 product(bool, PrintAdaptiveSizePolicy, false, \ 2143 "Print information about AdaptiveSizePolicy") \ 2144 \ 2145 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2146 "How far ahead to prefetch destination area (<= 0 means off)") \ 2147 \ 2148 product(intx, PrefetchScanIntervalInBytes, -1, \ 2149 "How far ahead to prefetch scan area (<= 0 means off)") \ 2150 \ 2151 product(intx, PrefetchFieldsAhead, -1, \ 2152 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2153 \ 2154 diagnostic(bool, VerifySilently, false, \ 2155 "Don't print print the verification progress") \ 2156 \ 2157 diagnostic(bool, VerifyDuringStartup, false, \ 2158 "Verify memory system before executing any Java code " \ 2159 "during VM initialization") \ 2160 \ 2161 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2162 "Verify system before exiting") \ 2163 \ 2164 diagnostic(bool, VerifyBeforeGC, false, \ 2165 "Verify memory system before GC") \ 2166 \ 2167 diagnostic(bool, VerifyAfterGC, false, \ 2168 "Verify memory system after GC") \ 2169 \ 2170 diagnostic(bool, VerifyDuringGC, false, \ 2171 "Verify memory system during GC (between phases)") \ 2172 \ 2173 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2174 "Enable parallel memory system verification") \ 2175 \ 2176 diagnostic(bool, DeferInitialCardMark, false, \ 2177 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2178 "may arise from new_pre_store_barrier") \ 2179 \ 2180 diagnostic(bool, VerifyRememberedSets, false, \ 2181 "Verify GC remembered sets") \ 2182 \ 2183 diagnostic(bool, VerifyObjectStartArray, true, \ 2184 "Verify GC object start array if verify before/after") \ 2185 \ 2186 product(bool, DisableExplicitGC, false, \ 2187 "Tells whether calling System.gc() does a full GC") \ 2188 \ 2189 notproduct(bool, CheckMemoryInitialization, false, \ 2190 "Checks memory initialization") \ 2191 \ 2192 product(bool, CollectGen0First, false, \ 2193 "Collect youngest generation before each full GC") \ 2194 \ 2195 diagnostic(bool, BindCMSThreadToCPU, false, \ 2196 "Bind CMS Thread to CPU if possible") \ 2197 \ 2198 diagnostic(uintx, CPUForCMSThread, 0, \ 2199 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2200 \ 2201 product(bool, BindGCTaskThreadsToCPUs, false, \ 2202 "Bind GCTaskThreads to CPUs if possible") \ 2203 \ 2204 product(bool, UseGCTaskAffinity, false, \ 2205 "Use worker affinity when asking for GCTasks") \ 2206 \ 2207 product(uintx, ProcessDistributionStride, 4, \ 2208 "Stride through processors when distributing processes") \ 2209 \ 2210 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2211 "number of times the coordinator GC thread will sleep while " \ 2212 "yielding before giving up and resuming GC") \ 2213 \ 2214 product(uintx, CMSYieldSleepCount, 0, \ 2215 "number of times a GC thread (minus the coordinator) " \ 2216 "will sleep while yielding before giving up and resuming GC") \ 2217 \ 2218 /* gc tracing */ \ 2219 manageable(bool, PrintGC, false, \ 2220 "Print message at garbage collect") \ 2221 \ 2222 manageable(bool, PrintGCDetails, false, \ 2223 "Print more details at garbage collect") \ 2224 \ 2225 manageable(bool, PrintGCDateStamps, false, \ 2226 "Print date stamps at garbage collect") \ 2227 \ 2228 manageable(bool, PrintGCTimeStamps, false, \ 2229 "Print timestamps at garbage collect") \ 2230 \ 2231 product(bool, PrintGCTaskTimeStamps, false, \ 2232 "Print timestamps for individual gc worker thread tasks") \ 2233 \ 2234 develop(intx, ConcGCYieldTimeout, 0, \ 2235 "If non-zero, assert that GC threads yield within this # of ms.") \ 2236 \ 2237 notproduct(bool, TraceMarkSweep, false, \ 2238 "Trace mark sweep") \ 2239 \ 2240 product(bool, PrintReferenceGC, false, \ 2241 "Print times spent handling reference objects during GC " \ 2242 " (enabled only when PrintGCDetails)") \ 2243 \ 2244 develop(bool, TraceReferenceGC, false, \ 2245 "Trace handling of soft/weak/final/phantom references") \ 2246 \ 2247 develop(bool, TraceFinalizerRegistration, false, \ 2248 "Trace registration of final references") \ 2249 \ 2250 notproduct(bool, TraceScavenge, false, \ 2251 "Trace scavenge") \ 2252 \ 2253 product_rw(bool, TraceClassLoading, false, \ 2254 "Trace all classes loaded") \ 2255 \ 2256 product(bool, TraceClassLoadingPreorder, false, \ 2257 "Trace all classes loaded in order referenced (not loaded)") \ 2258 \ 2259 product_rw(bool, TraceClassUnloading, false, \ 2260 "Trace unloading of classes") \ 2261 \ 2262 product_rw(bool, TraceLoaderConstraints, false, \ 2263 "Trace loader constraints") \ 2264 \ 2265 develop(bool, TraceClassLoaderData, false, \ 2266 "Trace class loader loader_data lifetime") \ 2267 \ 2268 product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2269 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2270 "Initial size of the boot class loader data metaspace") \ 2271 \ 2272 product(bool, TraceGen0Time, false, \ 2273 "Trace accumulated time for Gen 0 collection") \ 2274 \ 2275 product(bool, TraceGen1Time, false, \ 2276 "Trace accumulated time for Gen 1 collection") \ 2277 \ 2278 product(bool, PrintTenuringDistribution, false, \ 2279 "Print tenuring age information") \ 2280 \ 2281 product_rw(bool, PrintHeapAtGC, false, \ 2282 "Print heap layout before and after each GC") \ 2283 \ 2284 product_rw(bool, PrintHeapAtGCExtended, false, \ 2285 "Prints extended information about the layout of the heap " \ 2286 "when -XX:+PrintHeapAtGC is set") \ 2287 \ 2288 product(bool, PrintHeapAtSIGBREAK, true, \ 2289 "Print heap layout in response to SIGBREAK") \ 2290 \ 2291 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2292 "Print a class histogram before any major stop-world GC") \ 2293 \ 2294 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2295 "Print a class histogram after any major stop-world GC") \ 2296 \ 2297 manageable(bool, PrintClassHistogram, false, \ 2298 "Print a histogram of class instances") \ 2299 \ 2300 develop(bool, TraceWorkGang, false, \ 2301 "Trace activities of work gangs") \ 2302 \ 2303 product(bool, TraceParallelOldGCTasks, false, \ 2304 "Trace multithreaded GC activity") \ 2305 \ 2306 develop(bool, TraceBlockOffsetTable, false, \ 2307 "Print BlockOffsetTable maps") \ 2308 \ 2309 develop(bool, TraceCardTableModRefBS, false, \ 2310 "Print CardTableModRefBS maps") \ 2311 \ 2312 develop(bool, TraceGCTaskManager, false, \ 2313 "Trace actions of the GC task manager") \ 2314 \ 2315 develop(bool, TraceGCTaskQueue, false, \ 2316 "Trace actions of the GC task queues") \ 2317 \ 2318 diagnostic(bool, TraceGCTaskThread, false, \ 2319 "Trace actions of the GC task threads") \ 2320 \ 2321 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2322 "Print the time taken by each parallel old gc phase." \ 2323 "PrintGCDetails must also be enabled.") \ 2324 \ 2325 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2326 "Trace parallel old gc marking phase") \ 2327 \ 2328 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2329 "Trace parallel old gc summary phase") \ 2330 \ 2331 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2332 "Trace parallel old gc compaction phase") \ 2333 \ 2334 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2335 "Trace parallel old gc dense prefix computation") \ 2336 \ 2337 develop(bool, IgnoreLibthreadGPFault, false, \ 2338 "Suppress workaround for libthread GP fault") \ 2339 \ 2340 product(bool, PrintJNIGCStalls, false, \ 2341 "Print diagnostic message when GC is stalled" \ 2342 "by JNI critical section") \ 2343 \ 2344 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2345 "The percentage of the used heap that the instances of a class " \ 2346 "must occupy for the class to generate a trace event.") \ 2347 \ 2348 /* GC log rotation setting */ \ 2349 \ 2350 product(bool, UseGCLogFileRotation, false, \ 2351 "Prevent large gclog file for long running app. " \ 2352 "Requires -Xloggc:<filename>") \ 2353 \ 2354 product(uintx, NumberOfGCLogFiles, 0, \ 2355 "Number of gclog files in rotation, " \ 2356 "Default: 0, no rotation") \ 2357 \ 2358 product(uintx, GCLogFileSize, 0, \ 2359 "GC log file size, Default: 0 bytes, no rotation " \ 2360 "Only valid with UseGCLogFileRotation") \ 2361 \ 2362 /* JVMTI heap profiling */ \ 2363 \ 2364 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2365 "Trace JVMTI object tagging calls") \ 2366 \ 2367 diagnostic(bool, VerifyBeforeIteration, false, \ 2368 "Verify memory system before JVMTI iteration") \ 2369 \ 2370 /* compiler interface */ \ 2371 \ 2372 develop(bool, CIPrintCompilerName, false, \ 2373 "when CIPrint is active, print the name of the active compiler") \ 2374 \ 2375 develop(bool, CIPrintCompileQueue, false, \ 2376 "display the contents of the compile queue whenever a " \ 2377 "compilation is enqueued") \ 2378 \ 2379 develop(bool, CIPrintRequests, false, \ 2380 "display every request for compilation") \ 2381 \ 2382 product(bool, CITime, false, \ 2383 "collect timing information for compilation") \ 2384 \ 2385 develop(bool, CITimeEach, false, \ 2386 "display timing information after each successful compilation") \ 2387 \ 2388 develop(bool, CICountOSR, false, \ 2389 "use a separate counter when assigning ids to osr compilations") \ 2390 \ 2391 develop(bool, CICompileNatives, true, \ 2392 "compile native methods if supported by the compiler") \ 2393 \ 2394 develop_pd(bool, CICompileOSR, \ 2395 "compile on stack replacement methods if supported by the " \ 2396 "compiler") \ 2397 \ 2398 develop(bool, CIPrintMethodCodes, false, \ 2399 "print method bytecodes of the compiled code") \ 2400 \ 2401 develop(bool, CIPrintTypeFlow, false, \ 2402 "print the results of ciTypeFlow analysis") \ 2403 \ 2404 develop(bool, CITraceTypeFlow, false, \ 2405 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2406 \ 2407 develop(intx, OSROnlyBCI, -1, \ 2408 "OSR only at this bci. Negative values mean exclude that bci") \ 2409 \ 2410 /* compiler */ \ 2411 \ 2412 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2413 "Number of compiler threads to run") \ 2414 \ 2415 product(intx, CompilationPolicyChoice, 0, \ 2416 "which compilation policy (0/1)") \ 2417 \ 2418 develop(bool, UseStackBanging, true, \ 2419 "use stack banging for stack overflow checks (required for " \ 2420 "proper StackOverflow handling; disable only to measure cost " \ 2421 "of stackbanging)") \ 2422 \ 2423 develop(bool, UseStrictFP, true, \ 2424 "use strict fp if modifier strictfp is set") \ 2425 \ 2426 develop(bool, GenerateSynchronizationCode, true, \ 2427 "generate locking/unlocking code for synchronized methods and " \ 2428 "monitors") \ 2429 \ 2430 develop(bool, GenerateCompilerNullChecks, true, \ 2431 "Generate explicit null checks for loads/stores/calls") \ 2432 \ 2433 develop(bool, GenerateRangeChecks, true, \ 2434 "Generate range checks for array accesses") \ 2435 \ 2436 develop_pd(bool, ImplicitNullChecks, \ 2437 "generate code for implicit null checks") \ 2438 \ 2439 product(bool, PrintSafepointStatistics, false, \ 2440 "print statistics about safepoint synchronization") \ 2441 \ 2442 product(intx, PrintSafepointStatisticsCount, 300, \ 2443 "total number of safepoint statistics collected " \ 2444 "before printing them out") \ 2445 \ 2446 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2447 "print safepoint statistics only when safepoint takes" \ 2448 " more than PrintSafepointSatisticsTimeout in millis") \ 2449 \ 2450 product(bool, TraceSafepointCleanupTime, false, \ 2451 "print the break down of clean up tasks performed during" \ 2452 " safepoint") \ 2453 \ 2454 product(bool, Inline, true, \ 2455 "enable inlining") \ 2456 \ 2457 product(bool, ClipInlining, true, \ 2458 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2459 \ 2460 develop(bool, UseCHA, true, \ 2461 "enable CHA") \ 2462 \ 2463 product(bool, UseTypeProfile, true, \ 2464 "Check interpreter profile for historically monomorphic calls") \ 2465 \ 2466 notproduct(bool, TimeCompiler, false, \ 2467 "time the compiler") \ 2468 \ 2469 diagnostic(bool, PrintInlining, false, \ 2470 "prints inlining optimizations") \ 2471 \ 2472 product(bool, UsePopCountInstruction, false, \ 2473 "Use population count instruction") \ 2474 \ 2475 develop(bool, EagerInitialization, false, \ 2476 "Eagerly initialize classes if possible") \ 2477 \ 2478 develop(bool, TraceMethodReplacement, false, \ 2479 "Print when methods are replaced do to recompilation") \ 2480 \ 2481 develop(bool, PrintMethodFlushing, false, \ 2482 "print the nmethods being flushed") \ 2483 \ 2484 develop(bool, UseRelocIndex, false, \ 2485 "use an index to speed random access to relocations") \ 2486 \ 2487 develop(bool, StressCodeBuffers, false, \ 2488 "Exercise code buffer expansion and other rare state changes") \ 2489 \ 2490 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2491 "Generate extra debugging info for non-safepoints in nmethods") \ 2492 \ 2493 product(bool, PrintVMOptions, false, \ 2494 "Print flags that appeared on the command line") \ 2495 \ 2496 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2497 "Ignore unrecognized VM options") \ 2498 \ 2499 product(bool, PrintCommandLineFlags, false, \ 2500 "Print flags specified on command line or set by ergonomics") \ 2501 \ 2502 product(bool, PrintFlagsInitial, false, \ 2503 "Print all VM flags before argument processing and exit VM") \ 2504 \ 2505 product(bool, PrintFlagsFinal, false, \ 2506 "Print all VM flags after argument and ergonomic processing") \ 2507 \ 2508 notproduct(bool, PrintFlagsWithComments, false, \ 2509 "Print all VM flags with default values and descriptions and exit")\ 2510 \ 2511 diagnostic(bool, SerializeVMOutput, true, \ 2512 "Use a mutex to serialize output to tty and hotspot.log") \ 2513 \ 2514 diagnostic(bool, DisplayVMOutput, true, \ 2515 "Display all VM output on the tty, independently of LogVMOutput") \ 2516 \ 2517 diagnostic(bool, LogVMOutput, trueInDebug, \ 2518 "Save VM output to hotspot.log, or to LogFile") \ 2519 \ 2520 diagnostic(ccstr, LogFile, NULL, \ 2521 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2522 \ 2523 product(ccstr, ErrorFile, NULL, \ 2524 "If an error occurs, save the error data to this file " \ 2525 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2526 \ 2527 product(bool, DisplayVMOutputToStderr, false, \ 2528 "If DisplayVMOutput is true, display all VM output to stderr") \ 2529 \ 2530 product(bool, DisplayVMOutputToStdout, false, \ 2531 "If DisplayVMOutput is true, display all VM output to stdout") \ 2532 \ 2533 product(bool, UseHeavyMonitors, false, \ 2534 "use heavyweight instead of lightweight Java monitors") \ 2535 \ 2536 product(bool, PrintStringTableStatistics, false, \ 2537 "print statistics about the StringTable and SymbolTable") \ 2538 \ 2539 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2540 "print histogram of the symbol table") \ 2541 \ 2542 notproduct(bool, ExitVMOnVerifyError, false, \ 2543 "standard exit from VM if bytecode verify error " \ 2544 "(only in debug mode)") \ 2545 \ 2546 notproduct(ccstr, AbortVMOnException, NULL, \ 2547 "Call fatal if this exception is thrown. Example: " \ 2548 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2549 \ 2550 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2551 "Call fatal if the exception pointed by AbortVMOnException " \ 2552 "has this message.") \ 2553 \ 2554 develop(bool, DebugVtables, false, \ 2555 "add debugging code to vtable dispatch") \ 2556 \ 2557 develop(bool, PrintVtables, false, \ 2558 "print vtables when printing klass") \ 2559 \ 2560 notproduct(bool, PrintVtableStats, false, \ 2561 "print vtables stats at end of run") \ 2562 \ 2563 develop(bool, TraceCreateZombies, false, \ 2564 "trace creation of zombie nmethods") \ 2565 \ 2566 notproduct(bool, IgnoreLockingAssertions, false, \ 2567 "disable locking assertions (for speed)") \ 2568 \ 2569 product(bool, RangeCheckElimination, true, \ 2570 "Eliminate range checks") \ 2571 \ 2572 develop_pd(bool, UncommonNullCast, \ 2573 "track occurrences of null in casts; adjust compiler tactics") \ 2574 \ 2575 develop(bool, TypeProfileCasts, true, \ 2576 "treat casts like calls for purposes of type profiling") \ 2577 \ 2578 develop(bool, DelayCompilationDuringStartup, true, \ 2579 "Delay invoking the compiler until main application class is " \ 2580 "loaded") \ 2581 \ 2582 develop(bool, CompileTheWorld, false, \ 2583 "Compile all methods in all classes in bootstrap class path " \ 2584 "(stress test)") \ 2585 \ 2586 develop(bool, CompileTheWorldPreloadClasses, true, \ 2587 "Preload all classes used by a class before start loading") \ 2588 \ 2589 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2590 "Force a safepoint every n compiles so sweeper can keep up") \ 2591 \ 2592 develop(bool, FillDelaySlots, true, \ 2593 "Fill delay slots (on SPARC only)") \ 2594 \ 2595 develop(bool, TimeLivenessAnalysis, false, \ 2596 "Time computation of bytecode liveness analysis") \ 2597 \ 2598 develop(bool, TraceLivenessGen, false, \ 2599 "Trace the generation of liveness analysis information") \ 2600 \ 2601 notproduct(bool, TraceLivenessQuery, false, \ 2602 "Trace queries of liveness analysis information") \ 2603 \ 2604 notproduct(bool, CollectIndexSetStatistics, false, \ 2605 "Collect information about IndexSets") \ 2606 \ 2607 develop(bool, UseLoopSafepoints, true, \ 2608 "Generate Safepoint nodes in every loop") \ 2609 \ 2610 develop(intx, FastAllocateSizeLimit, 128*K, \ 2611 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2612 "Inline allocations larger than this in doublewords must go slow")\ 2613 \ 2614 product(bool, AggressiveOpts, false, \ 2615 "Enable aggressive optimizations - see arguments.cpp") \ 2616 \ 2617 /* statistics */ \ 2618 develop(bool, CountCompiledCalls, false, \ 2619 "counts method invocations") \ 2620 \ 2621 notproduct(bool, CountRuntimeCalls, false, \ 2622 "counts VM runtime calls") \ 2623 \ 2624 develop(bool, CountJNICalls, false, \ 2625 "counts jni method invocations") \ 2626 \ 2627 notproduct(bool, CountJVMCalls, false, \ 2628 "counts jvm method invocations") \ 2629 \ 2630 notproduct(bool, CountRemovableExceptions, false, \ 2631 "count exceptions that could be replaced by branches due to " \ 2632 "inlining") \ 2633 \ 2634 notproduct(bool, ICMissHistogram, false, \ 2635 "produce histogram of IC misses") \ 2636 \ 2637 notproduct(bool, PrintClassStatistics, false, \ 2638 "prints class statistics at end of run") \ 2639 \ 2640 notproduct(bool, PrintMethodStatistics, false, \ 2641 "prints method statistics at end of run") \ 2642 \ 2643 /* interpreter */ \ 2644 develop(bool, ClearInterpreterLocals, false, \ 2645 "Always clear local variables of interpreter activations upon " \ 2646 "entry") \ 2647 \ 2648 product_pd(bool, RewriteBytecodes, \ 2649 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2650 \ 2651 product_pd(bool, RewriteFrequentPairs, \ 2652 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2653 \ 2654 diagnostic(bool, PrintInterpreter, false, \ 2655 "Prints the generated interpreter code") \ 2656 \ 2657 product(bool, UseInterpreter, true, \ 2658 "Use interpreter for non-compiled methods") \ 2659 \ 2660 develop(bool, UseFastSignatureHandlers, true, \ 2661 "Use fast signature handlers for native calls") \ 2662 \ 2663 product(bool, UseLoopCounter, true, \ 2664 "Increment invocation counter on backward branch") \ 2665 \ 2666 product(bool, UseFastEmptyMethods, true, \ 2667 "Use fast method entry code for empty methods") \ 2668 \ 2669 product(bool, UseFastAccessorMethods, true, \ 2670 "Use fast method entry code for accessor methods") \ 2671 \ 2672 product_pd(bool, UseOnStackReplacement, \ 2673 "Use on stack replacement, calls runtime if invoc. counter " \ 2674 "overflows in loop") \ 2675 \ 2676 notproduct(bool, TraceOnStackReplacement, false, \ 2677 "Trace on stack replacement") \ 2678 \ 2679 product_pd(bool, PreferInterpreterNativeStubs, \ 2680 "Use always interpreter stubs for native methods invoked via " \ 2681 "interpreter") \ 2682 \ 2683 develop(bool, CountBytecodes, false, \ 2684 "Count number of bytecodes executed") \ 2685 \ 2686 develop(bool, PrintBytecodeHistogram, false, \ 2687 "Print histogram of the executed bytecodes") \ 2688 \ 2689 develop(bool, PrintBytecodePairHistogram, false, \ 2690 "Print histogram of the executed bytecode pairs") \ 2691 \ 2692 diagnostic(bool, PrintSignatureHandlers, false, \ 2693 "Print code generated for native method signature handlers") \ 2694 \ 2695 develop(bool, VerifyOops, false, \ 2696 "Do plausibility checks for oops") \ 2697 \ 2698 develop(bool, CheckUnhandledOops, false, \ 2699 "Check for unhandled oops in VM code") \ 2700 \ 2701 develop(bool, VerifyJNIFields, trueInDebug, \ 2702 "Verify jfieldIDs for instance fields") \ 2703 \ 2704 notproduct(bool, VerifyJNIEnvThread, false, \ 2705 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2706 "from JNI") \ 2707 \ 2708 develop(bool, VerifyFPU, false, \ 2709 "Verify FPU state (check for NaN's, etc.)") \ 2710 \ 2711 develop(bool, VerifyThread, false, \ 2712 "Watch the thread register for corruption (SPARC only)") \ 2713 \ 2714 develop(bool, VerifyActivationFrameSize, false, \ 2715 "Verify that activation frame didn't become smaller than its " \ 2716 "minimal size") \ 2717 \ 2718 develop(bool, TraceFrequencyInlining, false, \ 2719 "Trace frequency based inlining") \ 2720 \ 2721 develop_pd(bool, InlineIntrinsics, \ 2722 "Inline intrinsics that can be statically resolved") \ 2723 \ 2724 product_pd(bool, ProfileInterpreter, \ 2725 "Profile at the bytecode level during interpretation") \ 2726 \ 2727 develop_pd(bool, ProfileTraps, \ 2728 "Profile deoptimization traps at the bytecode level") \ 2729 \ 2730 product(intx, ProfileMaturityPercentage, 20, \ 2731 "number of method invocations/branches (expressed as % of " \ 2732 "CompileThreshold) before using the method's profile") \ 2733 \ 2734 develop(bool, PrintMethodData, false, \ 2735 "Print the results of +ProfileInterpreter at end of run") \ 2736 \ 2737 develop(bool, VerifyDataPointer, trueInDebug, \ 2738 "Verify the method data pointer during interpreter profiling") \ 2739 \ 2740 develop(bool, VerifyCompiledCode, false, \ 2741 "Include miscellaneous runtime verifications in nmethod code; " \ 2742 "default off because it disturbs nmethod size heuristics") \ 2743 \ 2744 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2745 "Manually make GC thread crash then dump java stack trace; " \ 2746 "Test only") \ 2747 \ 2748 /* compilation */ \ 2749 product(bool, UseCompiler, true, \ 2750 "use compilation") \ 2751 \ 2752 develop(bool, TraceCompilationPolicy, false, \ 2753 "Trace compilation policy") \ 2754 \ 2755 develop(bool, TimeCompilationPolicy, false, \ 2756 "Time the compilation policy") \ 2757 \ 2758 product(bool, UseCounterDecay, true, \ 2759 "adjust recompilation counters") \ 2760 \ 2761 develop(intx, CounterHalfLifeTime, 30, \ 2762 "half-life time of invocation counters (in secs)") \ 2763 \ 2764 develop(intx, CounterDecayMinIntervalLength, 500, \ 2765 "Min. ms. between invocation of CounterDecay") \ 2766 \ 2767 product(bool, AlwaysCompileLoopMethods, false, \ 2768 "when using recompilation, never interpret methods " \ 2769 "containing loops") \ 2770 \ 2771 product(bool, DontCompileHugeMethods, true, \ 2772 "don't compile methods > HugeMethodLimit") \ 2773 \ 2774 /* Bytecode escape analysis estimation. */ \ 2775 product(bool, EstimateArgEscape, true, \ 2776 "Analyze bytecodes to estimate escape state of arguments") \ 2777 \ 2778 product(intx, BCEATraceLevel, 0, \ 2779 "How much tracing to do of bytecode escape analysis estimates") \ 2780 \ 2781 product(intx, MaxBCEAEstimateLevel, 5, \ 2782 "Maximum number of nested calls that are analyzed by BC EA.") \ 2783 \ 2784 product(intx, MaxBCEAEstimateSize, 150, \ 2785 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2786 \ 2787 product(intx, AllocatePrefetchStyle, 1, \ 2788 "0 = no prefetch, " \ 2789 "1 = prefetch instructions for each allocation, " \ 2790 "2 = use TLAB watermark to gate allocation prefetch, " \ 2791 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2792 \ 2793 product(intx, AllocatePrefetchDistance, -1, \ 2794 "Distance to prefetch ahead of allocation pointer") \ 2795 \ 2796 product(intx, AllocatePrefetchLines, 3, \ 2797 "Number of lines to prefetch ahead of array allocation pointer") \ 2798 \ 2799 product(intx, AllocateInstancePrefetchLines, 1, \ 2800 "Number of lines to prefetch ahead of instance allocation pointer") \ 2801 \ 2802 product(intx, AllocatePrefetchStepSize, 16, \ 2803 "Step size in bytes of sequential prefetch instructions") \ 2804 \ 2805 product(intx, AllocatePrefetchInstr, 0, \ 2806 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2807 \ 2808 /* deoptimization */ \ 2809 develop(bool, TraceDeoptimization, false, \ 2810 "Trace deoptimization") \ 2811 \ 2812 develop(bool, DebugDeoptimization, false, \ 2813 "Tracing various information while debugging deoptimization") \ 2814 \ 2815 product(intx, SelfDestructTimer, 0, \ 2816 "Will cause VM to terminate after a given time (in minutes) " \ 2817 "(0 means off)") \ 2818 \ 2819 product(intx, MaxJavaStackTraceDepth, 1024, \ 2820 "Max. no. of lines in the stack trace for Java exceptions " \ 2821 "(0 means all)") \ 2822 \ 2823 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2824 "Guarantee a safepoint (at least) every so many milliseconds " \ 2825 "(0 means none)")) \ 2826 \ 2827 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2828 "Guarantee a safepoint (at least) every so many milliseconds " \ 2829 "(0 means none)")) \ 2830 \ 2831 product(intx, SafepointTimeoutDelay, 10000, \ 2832 "Delay in milliseconds for option SafepointTimeout") \ 2833 \ 2834 product(intx, NmethodSweepFraction, 16, \ 2835 "Number of invocations of sweeper to cover all nmethods") \ 2836 \ 2837 product(intx, NmethodSweepCheckInterval, 5, \ 2838 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2839 \ 2840 notproduct(bool, LogSweeper, false, \ 2841 "Keep a ring buffer of sweeper activity") \ 2842 \ 2843 notproduct(intx, SweeperLogEntries, 1024, \ 2844 "Number of records in the ring buffer of sweeper activity") \ 2845 \ 2846 notproduct(intx, MemProfilingInterval, 500, \ 2847 "Time between each invocation of the MemProfiler") \ 2848 \ 2849 develop(intx, MallocCatchPtr, -1, \ 2850 "Hit breakpoint when mallocing/freeing this pointer") \ 2851 \ 2852 notproduct(intx, AssertRepeat, 1, \ 2853 "number of times to evaluate expression in assert " \ 2854 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2855 \ 2856 notproduct(ccstrlist, SuppressErrorAt, "", \ 2857 "List of assertions (file:line) to muzzle") \ 2858 \ 2859 notproduct(uintx, HandleAllocationLimit, 1024, \ 2860 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2861 "is used") \ 2862 \ 2863 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2864 "Threshold for total handle allocation when " \ 2865 "+TraceHandleAllocation is used") \ 2866 \ 2867 develop(intx, StackPrintLimit, 100, \ 2868 "number of stack frames to print in VM-level stack dump") \ 2869 \ 2870 notproduct(intx, MaxElementPrintSize, 256, \ 2871 "maximum number of elements to print") \ 2872 \ 2873 notproduct(intx, MaxSubklassPrintSize, 4, \ 2874 "maximum number of subklasses to print when printing klass") \ 2875 \ 2876 product(intx, MaxInlineLevel, 9, \ 2877 "maximum number of nested calls that are inlined") \ 2878 \ 2879 product(intx, MaxRecursiveInlineLevel, 1, \ 2880 "maximum number of nested recursive calls that are inlined") \ 2881 \ 2882 product_pd(intx, InlineSmallCode, \ 2883 "Only inline already compiled methods if their code size is " \ 2884 "less than this") \ 2885 \ 2886 product(intx, MaxInlineSize, 35, \ 2887 "maximum bytecode size of a method to be inlined") \ 2888 \ 2889 product_pd(intx, FreqInlineSize, \ 2890 "maximum bytecode size of a frequent method to be inlined") \ 2891 \ 2892 product(intx, MaxTrivialSize, 6, \ 2893 "maximum bytecode size of a trivial method to be inlined") \ 2894 \ 2895 product(intx, MinInliningThreshold, 250, \ 2896 "min. invocation count a method needs to have to be inlined") \ 2897 \ 2898 develop(intx, MethodHistogramCutoff, 100, \ 2899 "cutoff value for method invoc. histogram (+CountCalls)") \ 2900 \ 2901 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2902 "# of interpreted methods to show in profile") \ 2903 \ 2904 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2905 "# of compiled methods to show in profile") \ 2906 \ 2907 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2908 "# of stub methods to show in profile") \ 2909 \ 2910 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2911 "# of runtime stub nodes to show in profile") \ 2912 \ 2913 product(intx, ProfileIntervalsTicks, 100, \ 2914 "# of ticks between printing of interval profile " \ 2915 "(+ProfileIntervals)") \ 2916 \ 2917 notproduct(intx, ScavengeALotInterval, 1, \ 2918 "Interval between which scavenge will occur with +ScavengeALot") \ 2919 \ 2920 notproduct(intx, FullGCALotInterval, 1, \ 2921 "Interval between which full gc will occur with +FullGCALot") \ 2922 \ 2923 notproduct(intx, FullGCALotStart, 0, \ 2924 "For which invocation to start FullGCAlot") \ 2925 \ 2926 notproduct(intx, FullGCALotDummies, 32*K, \ 2927 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2928 "to move") \ 2929 \ 2930 develop(intx, DontYieldALotInterval, 10, \ 2931 "Interval between which yields will be dropped (milliseconds)") \ 2932 \ 2933 develop(intx, MinSleepInterval, 1, \ 2934 "Minimum sleep() interval (milliseconds) when " \ 2935 "ConvertSleepToYield is off (used for SOLARIS)") \ 2936 \ 2937 develop(intx, ProfilerPCTickThreshold, 15, \ 2938 "Number of ticks in a PC buckets to be a hotspot") \ 2939 \ 2940 notproduct(intx, DeoptimizeALotInterval, 5, \ 2941 "Number of exits until DeoptimizeALot kicks in") \ 2942 \ 2943 notproduct(intx, ZombieALotInterval, 5, \ 2944 "Number of exits until ZombieALot kicks in") \ 2945 \ 2946 develop(bool, StressNonEntrant, false, \ 2947 "Mark nmethods non-entrant at registration") \ 2948 \ 2949 diagnostic(intx, MallocVerifyInterval, 0, \ 2950 "if non-zero, verify C heap after every N calls to " \ 2951 "malloc/realloc/free") \ 2952 \ 2953 diagnostic(intx, MallocVerifyStart, 0, \ 2954 "if non-zero, start verifying C heap after Nth call to " \ 2955 "malloc/realloc/free") \ 2956 \ 2957 diagnostic(uintx, MallocMaxTestWords, 0, \ 2958 "if non-zero, max # of Words that malloc/realloc can allocate " \ 2959 "(for testing only)") \ 2960 \ 2961 product(intx, TypeProfileWidth, 2, \ 2962 "number of receiver types to record in call/cast profile") \ 2963 \ 2964 develop(intx, BciProfileWidth, 2, \ 2965 "number of return bci's to record in ret profile") \ 2966 \ 2967 product(intx, PerMethodRecompilationCutoff, 400, \ 2968 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2969 \ 2970 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2971 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2972 \ 2973 product(intx, PerMethodTrapLimit, 100, \ 2974 "Limit on traps (of one kind) in a method (includes inlines)") \ 2975 \ 2976 product(intx, PerBytecodeTrapLimit, 4, \ 2977 "Limit on traps (of one kind) at a particular BCI") \ 2978 \ 2979 develop(intx, InlineFrequencyRatio, 20, \ 2980 "Ratio of call site execution to caller method invocation") \ 2981 \ 2982 develop_pd(intx, InlineFrequencyCount, \ 2983 "Count of call site execution necessary to trigger frequent " \ 2984 "inlining") \ 2985 \ 2986 develop(intx, InlineThrowCount, 50, \ 2987 "Force inlining of interpreted methods that throw this often") \ 2988 \ 2989 develop(intx, InlineThrowMaxSize, 200, \ 2990 "Force inlining of throwing methods smaller than this") \ 2991 \ 2992 develop(intx, ProfilerNodeSize, 1024, \ 2993 "Size in K to allocate for the Profile Nodes of each thread") \ 2994 \ 2995 product_pd(intx, PreInflateSpin, \ 2996 "Number of times to spin wait before inflation") \ 2997 \ 2998 /* gc parameters */ \ 2999 product(uintx, InitialHeapSize, 0, \ 3000 "Initial heap size (in bytes); zero means use ergonomics") \ 3001 \ 3002 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 3003 "Maximum heap size (in bytes)") \ 3004 \ 3005 product(uintx, OldSize, ScaleForWordSize(4*M), \ 3006 "Initial tenured generation size (in bytes)") \ 3007 \ 3008 product(uintx, NewSize, ScaleForWordSize(1*M), \ 3009 "Initial new generation size (in bytes)") \ 3010 \ 3011 product(uintx, MaxNewSize, max_uintx, \ 3012 "Maximum new generation size (in bytes), max_uintx means set " \ 3013 "ergonomically") \ 3014 \ 3015 product(uintx, PretenureSizeThreshold, 0, \ 3016 "Maximum size in bytes of objects allocated in DefNew " \ 3017 "generation; zero means no maximum") \ 3018 \ 3019 product(uintx, TLABSize, 0, \ 3020 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3021 \ 3022 product(uintx, MinTLABSize, 2*K, \ 3023 "Minimum allowed TLAB size (in bytes)") \ 3024 \ 3025 product(uintx, TLABAllocationWeight, 35, \ 3026 "Allocation averaging weight") \ 3027 \ 3028 product(uintx, TLABWasteTargetPercent, 1, \ 3029 "Percentage of Eden that can be wasted") \ 3030 \ 3031 product(uintx, TLABRefillWasteFraction, 64, \ 3032 "Max TLAB waste at a refill (internal fragmentation)") \ 3033 \ 3034 product(uintx, TLABWasteIncrement, 4, \ 3035 "Increment allowed waste at slow allocation") \ 3036 \ 3037 product(uintx, SurvivorRatio, 8, \ 3038 "Ratio of eden/survivor space size") \ 3039 \ 3040 product(uintx, NewRatio, 2, \ 3041 "Ratio of new/old generation sizes") \ 3042 \ 3043 product_pd(uintx, NewSizeThreadIncrease, \ 3044 "Additional size added to desired new generation size per " \ 3045 "non-daemon thread (in bytes)") \ 3046 \ 3047 product_pd(uintx, MetaspaceSize, \ 3048 "Initial size of Metaspaces (in bytes)") \ 3049 \ 3050 product(uintx, MaxMetaspaceSize, max_uintx, \ 3051 "Maximum size of Metaspaces (in bytes)") \ 3052 \ 3053 product(uintx, ClassMetaspaceSize, 2*M, \ 3054 "Maximum size of InstanceKlass area in Metaspace used for " \ 3055 "UseCompressedKlassPointers") \ 3056 \ 3057 product(uintx, MinHeapFreeRatio, 40, \ 3058 "Min percentage of heap free after GC to avoid expansion") \ 3059 \ 3060 product(uintx, MaxHeapFreeRatio, 70, \ 3061 "Max percentage of heap free after GC to avoid shrinking") \ 3062 \ 3063 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3064 "Number of milliseconds per MB of free space in the heap") \ 3065 \ 3066 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3067 "Min change in heap space due to GC (in bytes)") \ 3068 \ 3069 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3070 "Min expansion of Metaspace (in bytes)") \ 3071 \ 3072 product(uintx, MinMetaspaceFreeRatio, 40, \ 3073 "Min percentage of Metaspace free after GC to avoid expansion") \ 3074 \ 3075 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3076 "Max percentage of Metaspace free after GC to avoid shrinking") \ 3077 \ 3078 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3079 "Max expansion of Metaspace without full GC (in bytes)") \ 3080 \ 3081 product(uintx, QueuedAllocationWarningCount, 0, \ 3082 "Number of times an allocation that queues behind a GC " \ 3083 "will retry before printing a warning") \ 3084 \ 3085 diagnostic(uintx, VerifyGCStartAt, 0, \ 3086 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3087 \ 3088 diagnostic(intx, VerifyGCLevel, 0, \ 3089 "Generation level at which to start +VerifyBefore/AfterGC") \ 3090 \ 3091 product(uintx, MaxTenuringThreshold, 15, \ 3092 "Maximum value for tenuring threshold") \ 3093 \ 3094 product(uintx, InitialTenuringThreshold, 7, \ 3095 "Initial value for tenuring threshold") \ 3096 \ 3097 product(uintx, TargetSurvivorRatio, 50, \ 3098 "Desired percentage of survivor space used after scavenge") \ 3099 \ 3100 product(uintx, MarkSweepDeadRatio, 5, \ 3101 "Percentage (0-100) of the old gen allowed as dead wood." \ 3102 "Serial mark sweep treats this as both the min and max value." \ 3103 "CMS uses this value only if it falls back to mark sweep." \ 3104 "Par compact uses a variable scale based on the density of the" \ 3105 "generation and treats this as the max value when the heap is" \ 3106 "either completely full or completely empty. Par compact also" \ 3107 "has a smaller default value; see arguments.cpp.") \ 3108 \ 3109 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3110 "How often should we fully compact the heap (ignoring the dead " \ 3111 "space parameters)") \ 3112 \ 3113 product(intx, PrintCMSStatistics, 0, \ 3114 "Statistics for CMS") \ 3115 \ 3116 product(bool, PrintCMSInitiationStatistics, false, \ 3117 "Statistics for initiating a CMS collection") \ 3118 \ 3119 product(intx, PrintFLSStatistics, 0, \ 3120 "Statistics for CMS' FreeListSpace") \ 3121 \ 3122 product(intx, PrintFLSCensus, 0, \ 3123 "Census for CMS' FreeListSpace") \ 3124 \ 3125 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3126 "Delay in ms between expansion and allocation") \ 3127 \ 3128 develop(uintx, GCWorkerDelayMillis, 0, \ 3129 "Delay in ms in scheduling GC workers") \ 3130 \ 3131 product(intx, DeferThrSuspendLoopCount, 4000, \ 3132 "(Unstable) Number of times to iterate in safepoint loop " \ 3133 " before blocking VM threads ") \ 3134 \ 3135 product(intx, DeferPollingPageLoopCount, -1, \ 3136 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3137 "before changing safepoint polling page to RO ") \ 3138 \ 3139 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3140 \ 3141 product(bool, PSChunkLargeArrays, true, \ 3142 "true: process large arrays in chunks") \ 3143 \ 3144 product(uintx, GCDrainStackTargetSize, 64, \ 3145 "how many entries we'll try to leave on the stack during " \ 3146 "parallel GC") \ 3147 \ 3148 /* stack parameters */ \ 3149 product_pd(intx, StackYellowPages, \ 3150 "Number of yellow zone (recoverable overflows) pages") \ 3151 \ 3152 product_pd(intx, StackRedPages, \ 3153 "Number of red zone (unrecoverable overflows) pages") \ 3154 \ 3155 product_pd(intx, StackShadowPages, \ 3156 "Number of shadow zone (for overflow checking) pages" \ 3157 " this should exceed the depth of the VM and native call stack") \ 3158 \ 3159 product_pd(intx, ThreadStackSize, \ 3160 "Thread Stack Size (in Kbytes)") \ 3161 \ 3162 product_pd(intx, VMThreadStackSize, \ 3163 "Non-Java Thread Stack Size (in Kbytes)") \ 3164 \ 3165 product_pd(intx, CompilerThreadStackSize, \ 3166 "Compiler Thread Stack Size (in Kbytes)") \ 3167 \ 3168 develop_pd(uintx, JVMInvokeMethodSlack, \ 3169 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3170 \ 3171 product(uintx, ThreadSafetyMargin, 50*M, \ 3172 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3173 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3174 "disable this feature") \ 3175 \ 3176 /* code cache parameters */ \ 3177 /* ppc64 has large code-entry alignment. */ \ 3178 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64), \ 3179 "Code cache segment size (in bytes) - smallest unit of " \ 3180 "allocation") \ 3181 \ 3182 develop_pd(intx, CodeEntryAlignment, \ 3183 "Code entry alignment for generated code (in bytes)") \ 3184 \ 3185 product_pd(intx, OptoLoopAlignment, \ 3186 "Align inner loops to zero relative to this modulus") \ 3187 \ 3188 product_pd(uintx, InitialCodeCacheSize, \ 3189 "Initial code cache size (in bytes)") \ 3190 \ 3191 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3192 "Minimum code cache size (in bytes) required to start VM.") \ 3193 \ 3194 product_pd(uintx, ReservedCodeCacheSize, \ 3195 "Reserved code cache size (in bytes) - maximum code cache size") \ 3196 \ 3197 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3198 "When less than X space left, we stop compiling.") \ 3199 \ 3200 product_pd(uintx, CodeCacheExpansionSize, \ 3201 "Code cache expansion size (in bytes)") \ 3202 \ 3203 develop_pd(uintx, CodeCacheMinBlockLength, \ 3204 "Minimum number of segments in a code cache block.") \ 3205 \ 3206 notproduct(bool, ExitOnFullCodeCache, false, \ 3207 "Exit the VM if we fill the code cache.") \ 3208 \ 3209 product(bool, UseCodeCacheFlushing, true, \ 3210 "Attempt to clean the code cache before shutting off compiler") \ 3211 \ 3212 product(intx, MinCodeCacheFlushingInterval, 30, \ 3213 "Min number of seconds between code cache cleaning sessions") \ 3214 \ 3215 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3216 "When less than X space left, start code cache cleaning") \ 3217 \ 3218 product(uintx, CodeCacheFlushingFraction, 2, \ 3219 "Fraction of the code cache that is flushed when full") \ 3220 \ 3221 /* interpreter debugging */ \ 3222 develop(intx, BinarySwitchThreshold, 5, \ 3223 "Minimal number of lookupswitch entries for rewriting to binary " \ 3224 "switch") \ 3225 \ 3226 develop(intx, StopInterpreterAt, 0, \ 3227 "Stops interpreter execution at specified bytecode number") \ 3228 \ 3229 develop(intx, TraceBytecodesAt, 0, \ 3230 "Traces bytecodes starting with specified bytecode number") \ 3231 \ 3232 /* compiler interface */ \ 3233 develop(intx, CIStart, 0, \ 3234 "the id of the first compilation to permit") \ 3235 \ 3236 develop(intx, CIStop, -1, \ 3237 "the id of the last compilation to permit") \ 3238 \ 3239 develop(intx, CIStartOSR, 0, \ 3240 "the id of the first osr compilation to permit " \ 3241 "(CICountOSR must be on)") \ 3242 \ 3243 develop(intx, CIStopOSR, -1, \ 3244 "the id of the last osr compilation to permit " \ 3245 "(CICountOSR must be on)") \ 3246 \ 3247 develop(intx, CIBreakAtOSR, -1, \ 3248 "id of osr compilation to break at") \ 3249 \ 3250 develop(intx, CIBreakAt, -1, \ 3251 "id of compilation to break at") \ 3252 \ 3253 product(ccstrlist, CompileOnly, "", \ 3254 "List of methods (pkg/class.name) to restrict compilation to") \ 3255 \ 3256 product(ccstr, CompileCommandFile, NULL, \ 3257 "Read compiler commands from this file [.hotspot_compiler]") \ 3258 \ 3259 product(ccstrlist, CompileCommand, "", \ 3260 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3261 \ 3262 develop(bool, ReplayCompiles, false, \ 3263 "Enable replay of compilations from ReplayDataFile") \ 3264 \ 3265 product(ccstr, ReplayDataFile, NULL, \ 3266 "File containing compilation replay information" \ 3267 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3268 \ 3269 develop(intx, ReplaySuppressInitializers, 2, \ 3270 "Controls handling of class initialization during replay" \ 3271 "0 - don't do anything special" \ 3272 "1 - treat all class initializers as empty" \ 3273 "2 - treat class initializers for application classes as empty" \ 3274 "3 - allow all class initializers to run during bootstrap but" \ 3275 " pretend they are empty after starting replay") \ 3276 \ 3277 develop(bool, ReplayIgnoreInitErrors, false, \ 3278 "Ignore exceptions thrown during initialization for replay") \ 3279 \ 3280 product(bool, DumpReplayDataOnError, true, \ 3281 "Record replay data for crashing compiler threads") \ 3282 \ 3283 product(bool, CICompilerCountPerCPU, false, \ 3284 "1 compiler thread for log(N CPUs)") \ 3285 \ 3286 develop(intx, CIFireOOMAt, -1, \ 3287 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3288 "(non-negative value throws OOM after this many CI accesses " \ 3289 "in each compile)") \ 3290 notproduct(intx, CICrashAt, -1, \ 3291 "id of compilation to trigger assert in compiler thread for " \ 3292 "the purpose of testing, e.g. generation of replay data") \ 3293 notproduct(bool, CIObjectFactoryVerify, false, \ 3294 "enable potentially expensive verification in ciObjectFactory") \ 3295 \ 3296 /* Priorities */ \ 3297 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3298 \ 3299 product(intx, ThreadPriorityPolicy, 0, \ 3300 "0 : Normal. "\ 3301 " VM chooses priorities that are appropriate for normal "\ 3302 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3303 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3304 " map to lower native priority values. On Windows applications"\ 3305 " are allowed to use higher native priorities. However, with "\ 3306 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3307 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3308 " interfere with system threads. On Linux thread priorities "\ 3309 " are ignored because the OS does not support static priority "\ 3310 " in SCHED_OTHER scheduling class which is the only choice for"\ 3311 " non-root, non-realtime applications. "\ 3312 "1 : Aggressive. "\ 3313 " Java thread priorities map over to the entire range of "\ 3314 " native thread priorities. Higher Java thread priorities map "\ 3315 " to higher native thread priorities. This policy should be "\ 3316 " used with care, as sometimes it can cause performance "\ 3317 " degradation in the application and/or the entire system. On "\ 3318 " Linux this policy requires root privilege.") \ 3319 \ 3320 product(bool, ThreadPriorityVerbose, false, \ 3321 "Print priority changes") \ 3322 \ 3323 product(intx, DefaultThreadPriority, -1, \ 3324 "The native priority at which threads run if not elsewhere " \ 3325 "specified (-1 means no change)") \ 3326 \ 3327 product(intx, CompilerThreadPriority, -1, \ 3328 "The native priority at which compiler threads should run " \ 3329 "(-1 means no change)") \ 3330 \ 3331 product(intx, VMThreadPriority, -1, \ 3332 "The native priority at which the VM thread should run " \ 3333 "(-1 means no change)") \ 3334 \ 3335 product(bool, CompilerThreadHintNoPreempt, true, \ 3336 "(Solaris only) Give compiler threads an extra quanta") \ 3337 \ 3338 product(bool, VMThreadHintNoPreempt, false, \ 3339 "(Solaris only) Give VM thread an extra quanta") \ 3340 \ 3341 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3342 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3343 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3344 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3345 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3346 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3347 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3348 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3349 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3350 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3351 \ 3352 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3353 "Java thread priority 10 maps to critical scheduling priority") \ 3354 \ 3355 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3356 "Compiler thread(s) run at critical scheduling priority") \ 3357 \ 3358 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3359 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3360 \ 3361 /* compiler debugging */ \ 3362 notproduct(intx, CompileTheWorldStartAt, 1, \ 3363 "First class to consider when using +CompileTheWorld") \ 3364 \ 3365 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3366 "Last class to consider when using +CompileTheWorld") \ 3367 \ 3368 develop(intx, NewCodeParameter, 0, \ 3369 "Testing Only: Create a dedicated integer parameter before " \ 3370 "putback") \ 3371 \ 3372 /* new oopmap storage allocation */ \ 3373 develop(intx, MinOopMapAllocation, 8, \ 3374 "Minimum number of OopMap entries in an OopMapSet") \ 3375 \ 3376 /* Background Compilation */ \ 3377 develop(intx, LongCompileThreshold, 50, \ 3378 "Used with +TraceLongCompiles") \ 3379 \ 3380 product(intx, StarvationMonitorInterval, 200, \ 3381 "Pause between each check in ms") \ 3382 \ 3383 /* recompilation */ \ 3384 product_pd(intx, CompileThreshold, \ 3385 "number of interpreted method invocations before (re-)compiling") \ 3386 \ 3387 product_pd(intx, BackEdgeThreshold, \ 3388 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3389 \ 3390 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3391 "Interpreter (tier 0) invocation notification frequency.") \ 3392 \ 3393 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3394 "C1 without MDO (tier 2) invocation notification frequency.") \ 3395 \ 3396 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3397 "C1 with MDO profiling (tier 3) invocation notification " \ 3398 "frequency.") \ 3399 \ 3400 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3401 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3402 \ 3403 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3404 "Interpreter (tier 0) invocation notification frequency.") \ 3405 \ 3406 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3407 "C1 without MDO (tier 2) invocation notification frequency.") \ 3408 \ 3409 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3410 "C1 with MDO profiling (tier 3) invocation notification " \ 3411 "frequency.") \ 3412 \ 3413 product(intx, Tier2CompileThreshold, 0, \ 3414 "threshold at which tier 2 compilation is invoked") \ 3415 \ 3416 product(intx, Tier2BackEdgeThreshold, 0, \ 3417 "Back edge threshold at which tier 2 compilation is invoked") \ 3418 \ 3419 product(intx, Tier3InvocationThreshold, 200, \ 3420 "Compile if number of method invocations crosses this " \ 3421 "threshold") \ 3422 \ 3423 product(intx, Tier3MinInvocationThreshold, 100, \ 3424 "Minimum invocation to compile at tier 3") \ 3425 \ 3426 product(intx, Tier3CompileThreshold, 2000, \ 3427 "Threshold at which tier 3 compilation is invoked (invocation " \ 3428 "minimum must be satisfied.") \ 3429 \ 3430 product(intx, Tier3BackEdgeThreshold, 60000, \ 3431 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3432 \ 3433 product(intx, Tier4InvocationThreshold, 5000, \ 3434 "Compile if number of method invocations crosses this " \ 3435 "threshold") \ 3436 \ 3437 product(intx, Tier4MinInvocationThreshold, 600, \ 3438 "Minimum invocation to compile at tier 4") \ 3439 \ 3440 product(intx, Tier4CompileThreshold, 15000, \ 3441 "Threshold at which tier 4 compilation is invoked (invocation " \ 3442 "minimum must be satisfied.") \ 3443 \ 3444 product(intx, Tier4BackEdgeThreshold, 40000, \ 3445 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3446 \ 3447 product(intx, Tier3DelayOn, 5, \ 3448 "If C2 queue size grows over this amount per compiler thread " \ 3449 "stop compiling at tier 3 and start compiling at tier 2") \ 3450 \ 3451 product(intx, Tier3DelayOff, 2, \ 3452 "If C2 queue size is less than this amount per compiler thread " \ 3453 "allow methods compiled at tier 2 transition to tier 3") \ 3454 \ 3455 product(intx, Tier3LoadFeedback, 5, \ 3456 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3457 "reaches this amount per compiler thread") \ 3458 \ 3459 product(intx, Tier4LoadFeedback, 3, \ 3460 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3461 "reaches this amount per compiler thread") \ 3462 \ 3463 product(intx, TieredCompileTaskTimeout, 50, \ 3464 "Kill compile task if method was not used within " \ 3465 "given timeout in milliseconds") \ 3466 \ 3467 product(intx, TieredStopAtLevel, 4, \ 3468 "Stop at given compilation level") \ 3469 \ 3470 product(intx, Tier0ProfilingStartPercentage, 200, \ 3471 "Start profiling in interpreter if the counters exceed tier 3" \ 3472 "thresholds by the specified percentage") \ 3473 \ 3474 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3475 "Increase the compile threshold for C1 compilation if the code" \ 3476 "cache is filled by the specified percentage.") \ 3477 \ 3478 product(intx, TieredRateUpdateMinTime, 1, \ 3479 "Minimum rate sampling interval (in milliseconds)") \ 3480 \ 3481 product(intx, TieredRateUpdateMaxTime, 25, \ 3482 "Maximum rate sampling interval (in milliseconds)") \ 3483 \ 3484 product_pd(bool, TieredCompilation, \ 3485 "Enable tiered compilation") \ 3486 \ 3487 product(bool, PrintTieredEvents, false, \ 3488 "Print tiered events notifications") \ 3489 \ 3490 product_pd(intx, OnStackReplacePercentage, \ 3491 "NON_TIERED number of method invocations/branches (expressed as %"\ 3492 "of CompileThreshold) before (re-)compiling OSR code") \ 3493 \ 3494 product(intx, InterpreterProfilePercentage, 33, \ 3495 "NON_TIERED number of method invocations/branches (expressed as %"\ 3496 "of CompileThreshold) before profiling in the interpreter") \ 3497 \ 3498 develop(intx, MaxRecompilationSearchLength, 10, \ 3499 "max. # frames to inspect searching for recompilee") \ 3500 \ 3501 develop(intx, MaxInterpretedSearchLength, 3, \ 3502 "max. # interp. frames to skip when searching for recompilee") \ 3503 \ 3504 develop(intx, DesiredMethodLimit, 8000, \ 3505 "desired max. method size (in bytecodes) after inlining") \ 3506 \ 3507 develop(intx, HugeMethodLimit, 8000, \ 3508 "don't compile methods larger than this if " \ 3509 "+DontCompileHugeMethods") \ 3510 \ 3511 /* New JDK 1.4 reflection implementation */ \ 3512 \ 3513 develop(bool, UseNewReflection, true, \ 3514 "Temporary flag for transition to reflection based on dynamic " \ 3515 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3516 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3517 "changes were needed") \ 3518 \ 3519 develop(bool, VerifyReflectionBytecodes, false, \ 3520 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3521 "in situations like that described in 4486457 or for " \ 3522 "constructors generated for serialization, so can not be enabled "\ 3523 "in product.") \ 3524 \ 3525 product(bool, ReflectionWrapResolutionErrors, true, \ 3526 "Temporary flag for transition to AbstractMethodError wrapped " \ 3527 "in InvocationTargetException. See 6531596") \ 3528 \ 3529 \ 3530 develop(intx, FastSuperclassLimit, 8, \ 3531 "Depth of hardwired instanceof accelerator array") \ 3532 \ 3533 /* Properties for Java libraries */ \ 3534 \ 3535 product(uintx, MaxDirectMemorySize, 0, \ 3536 "Maximum total size of NIO direct-buffer allocations") \ 3537 \ 3538 /* temporary developer defined flags */ \ 3539 \ 3540 diagnostic(bool, UseNewCode, false, \ 3541 "Testing Only: Use the new version while testing") \ 3542 \ 3543 diagnostic(bool, UseNewCode2, false, \ 3544 "Testing Only: Use the new version while testing") \ 3545 \ 3546 diagnostic(bool, UseNewCode3, false, \ 3547 "Testing Only: Use the new version while testing") \ 3548 \ 3549 /* flags for performance data collection */ \ 3550 \ 3551 product(bool, UsePerfData, falseInEmbedded, \ 3552 "Flag to disable jvmstat instrumentation for performance testing" \ 3553 "and problem isolation purposes.") \ 3554 \ 3555 product(bool, PerfDataSaveToFile, false, \ 3556 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3557 \ 3558 product(ccstr, PerfDataSaveFile, NULL, \ 3559 "Save PerfData memory to the specified absolute pathname," \ 3560 "%p in the file name if present will be replaced by pid") \ 3561 \ 3562 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3563 "Data sampling interval in milliseconds") \ 3564 \ 3565 develop(bool, PerfTraceDataCreation, false, \ 3566 "Trace creation of Performance Data Entries") \ 3567 \ 3568 develop(bool, PerfTraceMemOps, false, \ 3569 "Trace PerfMemory create/attach/detach calls") \ 3570 \ 3571 product(bool, PerfDisableSharedMem, false, \ 3572 "Store performance data in standard memory") \ 3573 \ 3574 product(intx, PerfDataMemorySize, 32*K, \ 3575 "Size of performance data memory region. Will be rounded " \ 3576 "up to a multiple of the native os page size.") \ 3577 \ 3578 product(intx, PerfMaxStringConstLength, 1024, \ 3579 "Maximum PerfStringConstant string length before truncation") \ 3580 \ 3581 product(bool, PerfAllowAtExitRegistration, false, \ 3582 "Allow registration of atexit() methods") \ 3583 \ 3584 product(bool, PerfBypassFileSystemCheck, false, \ 3585 "Bypass Win32 file system criteria checks (Windows Only)") \ 3586 \ 3587 product(intx, UnguardOnExecutionViolation, 0, \ 3588 "Unguard page and retry on no-execute fault (Win32 only)" \ 3589 "0=off, 1=conservative, 2=aggressive") \ 3590 \ 3591 /* Serviceability Support */ \ 3592 \ 3593 product(bool, ManagementServer, false, \ 3594 "Create JMX Management Server") \ 3595 \ 3596 product(bool, DisableAttachMechanism, false, \ 3597 "Disable mechanism that allows tools to attach to this VM") \ 3598 \ 3599 product(bool, StartAttachListener, false, \ 3600 "Always start Attach Listener at VM startup") \ 3601 \ 3602 manageable(bool, PrintConcurrentLocks, false, \ 3603 "Print java.util.concurrent locks in thread dump") \ 3604 \ 3605 product(bool, TransmitErrorReport, false, \ 3606 "Enable error report transmission on erroneous termination") \ 3607 \ 3608 product(ccstr, ErrorReportServer, NULL, \ 3609 "Override built-in error report server address") \ 3610 \ 3611 /* Shared spaces */ \ 3612 \ 3613 product(bool, UseSharedSpaces, true, \ 3614 "Use shared spaces for metadata") \ 3615 \ 3616 product(bool, RequireSharedSpaces, false, \ 3617 "Require shared spaces for metadata") \ 3618 \ 3619 product(bool, DumpSharedSpaces, false, \ 3620 "Special mode: JVM reads a class list, loads classes, builds " \ 3621 "shared spaces, and dumps the shared spaces to a file to be " \ 3622 "used in future JVM runs.") \ 3623 \ 3624 product(bool, PrintSharedSpaces, false, \ 3625 "Print usage of shared spaces") \ 3626 \ 3627 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3628 "Size of read-write space for metadata (in bytes)") \ 3629 \ 3630 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3631 "Size of read-only space for metadata (in bytes)") \ 3632 \ 3633 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3634 "Size of the shared miscellaneous data area (in bytes)") \ 3635 \ 3636 product(uintx, SharedMiscCodeSize, 120*K, \ 3637 "Size of the shared miscellaneous code area (in bytes)") \ 3638 \ 3639 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 3640 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3641 "Address to allocate shared memory region for class data") \ 3642 \ 3643 diagnostic(bool, EnableInvokeDynamic, true, \ 3644 "support JSR 292 (method handles, invokedynamic, " \ 3645 "anonymous classes") \ 3646 \ 3647 diagnostic(bool, PrintMethodHandleStubs, false, \ 3648 "Print generated stub code for method handles") \ 3649 \ 3650 develop(bool, TraceMethodHandles, false, \ 3651 "trace internal method handle operations") \ 3652 \ 3653 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3654 "perform extra checks when constructing method handles") \ 3655 \ 3656 diagnostic(bool, ShowHiddenFrames, false, \ 3657 "show method handle implementation frames (usually hidden)") \ 3658 \ 3659 experimental(bool, TrustFinalNonStaticFields, false, \ 3660 "trust final non-static declarations for constant folding") \ 3661 \ 3662 develop(bool, TraceInvokeDynamic, false, \ 3663 "trace internal invoke dynamic operations") \ 3664 \ 3665 diagnostic(bool, PauseAtStartup, false, \ 3666 "Causes the VM to pause at startup time and wait for the pause " \ 3667 "file to be removed (default: ./vm.paused.<pid>)") \ 3668 \ 3669 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3670 "The file to create and for whose removal to await when pausing " \ 3671 "at startup. (default: ./vm.paused.<pid>)") \ 3672 \ 3673 diagnostic(bool, PauseAtExit, false, \ 3674 "Pause and wait for keypress on exit if a debugger is attached") \ 3675 \ 3676 product(bool, ExtendedDTraceProbes, false, \ 3677 "Enable performance-impacting dtrace probes") \ 3678 \ 3679 product(bool, DTraceMethodProbes, false, \ 3680 "Enable dtrace probes for method-entry and method-exit") \ 3681 \ 3682 product(bool, DTraceAllocProbes, false, \ 3683 "Enable dtrace probes for object allocation") \ 3684 \ 3685 product(bool, DTraceMonitorProbes, false, \ 3686 "Enable dtrace probes for monitor events") \ 3687 \ 3688 product(bool, RelaxAccessControlCheck, false, \ 3689 "Relax the access control checks in the verifier") \ 3690 \ 3691 diagnostic(bool, PrintDTraceDOF, false, \ 3692 "Print the DTrace DOF passed to the system for JSDT probes") \ 3693 \ 3694 product(uintx, StringTableSize, defaultStringTableSize, \ 3695 "Number of buckets in the interned String table") \ 3696 \ 3697 develop(bool, TraceDefaultMethods, false, \ 3698 "Trace the default method processing steps") \ 3699 \ 3700 develop(bool, ParseAllGenericSignatures, false, \ 3701 "Parse all generic signatures while classloading") \ 3702 \ 3703 develop(bool, VerifyGenericSignatures, false, \ 3704 "Abort VM on erroneous or inconsistent generic signatures") \ 3705 \ 3706 product(bool, ParseGenericDefaults, false, \ 3707 "Parse generic signatures for default method handling") \ 3708 \ 3709 product(bool, UseVMInterruptibleIO, false, \ 3710 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3711 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3712 " of this flag is true for JDK 6 and earlier") \ 3713 \ 3714 diagnostic(bool, WhiteBoxAPI, false, \ 3715 "Enable internal testing APIs") \ 3716 \ 3717 product(bool, PrintGCCause, true, \ 3718 "Include GC cause in GC logging") \ 3719 \ 3720 product(bool , AllowNonVirtualCalls, false, \ 3721 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 3722 \ 3723 diagnostic(ccstr, SharedArchiveFile, NULL, \ 3724 "Override the default location of the CDS archive file") \ 3725 \ 3726 experimental(uintx, ArrayAllocatorMallocLimit, \ 3727 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \ 3728 "Allocation less than this value will be allocated " \ 3729 "using malloc. Larger allocations will use mmap.") \ 3730 \ 3731 product(bool, EnableTracing, false, \ 3732 "Enable event-based tracing") \ 3733 product(bool, UseLockedTracing, false, \ 3734 "Use locked-tracing when doing event-based tracing") 3735 3736 3737/* 3738 * Macros for factoring of globals 3739 */ 3740 3741// Interface macros 3742#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3743#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3744#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3745#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3746#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3747#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3748#ifdef PRODUCT 3749#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3750#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3751#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3752#else 3753#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3754#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3755#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3756#endif 3757// Special LP64 flags, product only needed for now. 3758#ifdef _LP64 3759#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3760#else 3761#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3762#endif // _LP64 3763 3764// Implementation macros 3765#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3766#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3767#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3768#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3769#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3770#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3771#ifdef PRODUCT 3772#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3773#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3774#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3775#else 3776#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3777#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3778#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3779#endif 3780#ifdef _LP64 3781#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3782#else 3783#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3784#endif // _LP64 3785 3786RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG) 3787 3788RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3789 3790ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3791 3792// Extensions 3793 3794#include "runtime/globals_ext.hpp" 3795 3796#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3797