globals.hpp revision 4802:f2110083203d
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_bsd 65# include "globals_bsd.hpp" 66#endif 67#ifdef TARGET_OS_ARCH_linux_x86 68# include "globals_linux_x86.hpp" 69#endif 70#ifdef TARGET_OS_ARCH_linux_sparc 71# include "globals_linux_sparc.hpp" 72#endif 73#ifdef TARGET_OS_ARCH_linux_zero 74# include "globals_linux_zero.hpp" 75#endif 76#ifdef TARGET_OS_ARCH_solaris_x86 77# include "globals_solaris_x86.hpp" 78#endif 79#ifdef TARGET_OS_ARCH_solaris_sparc 80# include "globals_solaris_sparc.hpp" 81#endif 82#ifdef TARGET_OS_ARCH_windows_x86 83# include "globals_windows_x86.hpp" 84#endif 85#ifdef TARGET_OS_ARCH_linux_arm 86# include "globals_linux_arm.hpp" 87#endif 88#ifdef TARGET_OS_ARCH_linux_ppc 89# include "globals_linux_ppc.hpp" 90#endif 91#ifdef TARGET_OS_ARCH_bsd_x86 92# include "globals_bsd_x86.hpp" 93#endif 94#ifdef TARGET_OS_ARCH_bsd_zero 95# include "globals_bsd_zero.hpp" 96#endif 97#ifdef COMPILER1 98#ifdef TARGET_ARCH_x86 99# include "c1_globals_x86.hpp" 100#endif 101#ifdef TARGET_ARCH_sparc 102# include "c1_globals_sparc.hpp" 103#endif 104#ifdef TARGET_ARCH_arm 105# include "c1_globals_arm.hpp" 106#endif 107#ifdef TARGET_ARCH_ppc 108# include "c1_globals_ppc.hpp" 109#endif 110#ifdef TARGET_OS_FAMILY_linux 111# include "c1_globals_linux.hpp" 112#endif 113#ifdef TARGET_OS_FAMILY_solaris 114# include "c1_globals_solaris.hpp" 115#endif 116#ifdef TARGET_OS_FAMILY_windows 117# include "c1_globals_windows.hpp" 118#endif 119#ifdef TARGET_OS_FAMILY_bsd 120# include "c1_globals_bsd.hpp" 121#endif 122#endif 123#ifdef COMPILER2 124#ifdef TARGET_ARCH_x86 125# include "c2_globals_x86.hpp" 126#endif 127#ifdef TARGET_ARCH_sparc 128# include "c2_globals_sparc.hpp" 129#endif 130#ifdef TARGET_ARCH_arm 131# include "c2_globals_arm.hpp" 132#endif 133#ifdef TARGET_OS_FAMILY_linux 134# include "c2_globals_linux.hpp" 135#endif 136#ifdef TARGET_OS_FAMILY_solaris 137# include "c2_globals_solaris.hpp" 138#endif 139#ifdef TARGET_OS_FAMILY_windows 140# include "c2_globals_windows.hpp" 141#endif 142#ifdef TARGET_OS_FAMILY_bsd 143# include "c2_globals_bsd.hpp" 144#endif 145#endif 146#ifdef SHARK 147#ifdef TARGET_ARCH_zero 148# include "shark_globals_zero.hpp" 149#endif 150#endif 151 152#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 153define_pd_global(bool, BackgroundCompilation, false); 154define_pd_global(bool, UseTLAB, false); 155define_pd_global(bool, CICompileOSR, false); 156define_pd_global(bool, UseTypeProfile, false); 157define_pd_global(bool, UseOnStackReplacement, false); 158define_pd_global(bool, InlineIntrinsics, false); 159define_pd_global(bool, PreferInterpreterNativeStubs, true); 160define_pd_global(bool, ProfileInterpreter, false); 161define_pd_global(bool, ProfileTraps, false); 162define_pd_global(bool, TieredCompilation, false); 163 164define_pd_global(intx, CompileThreshold, 0); 165define_pd_global(intx, BackEdgeThreshold, 0); 166 167define_pd_global(intx, OnStackReplacePercentage, 0); 168define_pd_global(bool, ResizeTLAB, false); 169define_pd_global(intx, FreqInlineSize, 0); 170define_pd_global(intx, InlineSmallCode, 0); 171define_pd_global(intx, NewSizeThreadIncrease, 4*K); 172define_pd_global(intx, InlineClassNatives, true); 173define_pd_global(intx, InlineUnsafeOps, true); 174define_pd_global(intx, InitialCodeCacheSize, 160*K); 175define_pd_global(intx, ReservedCodeCacheSize, 32*M); 176define_pd_global(intx, CodeCacheExpansionSize, 32*K); 177define_pd_global(intx, CodeCacheMinBlockLength, 1); 178define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 179define_pd_global(bool, NeverActAsServerClassMachine, true); 180define_pd_global(uint64_t,MaxRAM, 1ULL*G); 181#define CI_COMPILER_COUNT 0 182#else 183 184#ifdef COMPILER2 185#define CI_COMPILER_COUNT 2 186#else 187#define CI_COMPILER_COUNT 1 188#endif // COMPILER2 189 190#endif // no compilers 191 192// string type aliases used only in this file 193typedef const char* ccstr; 194typedef const char* ccstrlist; // represents string arguments which accumulate 195 196enum FlagValueOrigin { 197 DEFAULT = 0, 198 COMMAND_LINE = 1, 199 ENVIRON_VAR = 2, 200 CONFIG_FILE = 3, 201 MANAGEMENT = 4, 202 ERGONOMIC = 5, 203 ATTACH_ON_DEMAND = 6, 204 INTERNAL = 99 205}; 206 207struct Flag { 208 const char *type; 209 const char *name; 210 void* addr; 211 212 NOT_PRODUCT(const char *doc;) 213 214 const char *kind; 215 FlagValueOrigin origin; 216 217 // points to all Flags static array 218 static Flag *flags; 219 220 // number of flags 221 static size_t numFlags; 222 223 static Flag* find_flag(char* name, size_t length, bool allow_locked = false); 224 225 bool is_bool() const { return strcmp(type, "bool") == 0; } 226 bool get_bool() const { return *((bool*) addr); } 227 void set_bool(bool value) { *((bool*) addr) = value; } 228 229 bool is_intx() const { return strcmp(type, "intx") == 0; } 230 intx get_intx() const { return *((intx*) addr); } 231 void set_intx(intx value) { *((intx*) addr) = value; } 232 233 bool is_uintx() const { return strcmp(type, "uintx") == 0; } 234 uintx get_uintx() const { return *((uintx*) addr); } 235 void set_uintx(uintx value) { *((uintx*) addr) = value; } 236 237 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 238 uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 239 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 240 241 bool is_double() const { return strcmp(type, "double") == 0; } 242 double get_double() const { return *((double*) addr); } 243 void set_double(double value) { *((double*) addr) = value; } 244 245 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 246 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 247 ccstr get_ccstr() const { return *((ccstr*) addr); } 248 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 249 250 bool is_unlocker() const; 251 bool is_unlocked() const; 252 bool is_writeable() const; 253 bool is_external() const; 254 255 bool is_unlocker_ext() const; 256 bool is_unlocked_ext() const; 257 bool is_writeable_ext() const; 258 bool is_external_ext() const; 259 260 void get_locked_message(char*, int) const; 261 void get_locked_message_ext(char*, int) const; 262 263 void print_on(outputStream* st, bool withComments = false ); 264 void print_as_flag(outputStream* st); 265}; 266 267// debug flags control various aspects of the VM and are global accessible 268 269// use FlagSetting to temporarily change some debug flag 270// e.g. FlagSetting fs(DebugThisAndThat, true); 271// restored to previous value upon leaving scope 272class FlagSetting { 273 bool val; 274 bool* flag; 275 public: 276 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 277 ~FlagSetting() { *flag = val; } 278}; 279 280 281class CounterSetting { 282 intx* counter; 283 public: 284 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 285 ~CounterSetting() { (*counter)--; } 286}; 287 288 289class UIntFlagSetting { 290 uintx val; 291 uintx* flag; 292 public: 293 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 294 ~UIntFlagSetting() { *flag = val; } 295}; 296 297 298class DoubleFlagSetting { 299 double val; 300 double* flag; 301 public: 302 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 303 ~DoubleFlagSetting() { *flag = val; } 304}; 305 306 307class CommandLineFlags { 308 public: 309 static bool boolAt(char* name, size_t len, bool* value); 310 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 311 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 312 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 313 314 static bool intxAt(char* name, size_t len, intx* value); 315 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 316 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 317 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 318 319 static bool uintxAt(char* name, size_t len, uintx* value); 320 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 321 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 322 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 323 324 static bool uint64_tAt(char* name, size_t len, uint64_t* value); 325 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 326 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 327 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 328 329 static bool doubleAt(char* name, size_t len, double* value); 330 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 331 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 332 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 333 334 static bool ccstrAt(char* name, size_t len, ccstr* value); 335 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 336 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 337 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 338 339 // Returns false if name is not a command line flag. 340 static bool wasSetOnCmdline(const char* name, bool* value); 341 static void printSetFlags(outputStream* out); 342 343 static void printFlags(outputStream* out, bool withComments); 344 345 static void verify() PRODUCT_RETURN; 346}; 347 348// use this for flags that are true by default in the debug version but 349// false in the optimized version, and vice versa 350#ifdef ASSERT 351#define trueInDebug true 352#define falseInDebug false 353#else 354#define trueInDebug false 355#define falseInDebug true 356#endif 357 358// use this for flags that are true per default in the product build 359// but false in development builds, and vice versa 360#ifdef PRODUCT 361#define trueInProduct true 362#define falseInProduct false 363#else 364#define trueInProduct false 365#define falseInProduct true 366#endif 367 368#ifdef JAVASE_EMBEDDED 369#define falseInEmbedded false 370#else 371#define falseInEmbedded true 372#endif 373 374// develop flags are settable / visible only during development and are constant in the PRODUCT version 375// product flags are always settable / visible 376// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 377 378// A flag must be declared with one of the following types: 379// bool, intx, uintx, ccstr. 380// The type "ccstr" is an alias for "const char*" and is used 381// only in this file, because the macrology requires single-token type names. 382 383// Note: Diagnostic options not meant for VM tuning or for product modes. 384// They are to be used for VM quality assurance or field diagnosis 385// of VM bugs. They are hidden so that users will not be encouraged to 386// try them as if they were VM ordinary execution options. However, they 387// are available in the product version of the VM. Under instruction 388// from support engineers, VM customers can turn them on to collect 389// diagnostic information about VM problems. To use a VM diagnostic 390// option, you must first specify +UnlockDiagnosticVMOptions. 391// (This master switch also affects the behavior of -Xprintflags.) 392// 393// experimental flags are in support of features that are not 394// part of the officially supported product, but are available 395// for experimenting with. They could, for example, be performance 396// features that may not have undergone full or rigorous QA, but which may 397// help performance in some cases and released for experimentation 398// by the community of users and developers. This flag also allows one to 399// be able to build a fully supported product that nonetheless also 400// ships with some unsupported, lightly tested, experimental features. 401// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 402// UnlockExperimentalVMOptions flag, which allows the control and 403// modification of the experimental flags. 404// 405// Nota bene: neither diagnostic nor experimental options should be used casually, 406// and they are not supported on production loads, except under explicit 407// direction from support engineers. 408// 409// manageable flags are writeable external product flags. 410// They are dynamically writeable through the JDK management interface 411// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 412// These flags are external exported interface (see CCC). The list of 413// manageable flags can be queried programmatically through the management 414// interface. 415// 416// A flag can be made as "manageable" only if 417// - the flag is defined in a CCC as an external exported interface. 418// - the VM implementation supports dynamic setting of the flag. 419// This implies that the VM must *always* query the flag variable 420// and not reuse state related to the flag state at any given time. 421// - you want the flag to be queried programmatically by the customers. 422// 423// product_rw flags are writeable internal product flags. 424// They are like "manageable" flags but for internal/private use. 425// The list of product_rw flags are internal/private flags which 426// may be changed/removed in a future release. It can be set 427// through the management interface to get/set value 428// when the name of flag is supplied. 429// 430// A flag can be made as "product_rw" only if 431// - the VM implementation supports dynamic setting of the flag. 432// This implies that the VM must *always* query the flag variable 433// and not reuse state related to the flag state at any given time. 434// 435// Note that when there is a need to support develop flags to be writeable, 436// it can be done in the same way as product_rw. 437 438#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 439 \ 440 lp64_product(bool, UseCompressedOops, false, \ 441 "Use 32-bit object references in 64-bit VM " \ 442 "lp64_product means flag is always constant in 32 bit VM") \ 443 \ 444 lp64_product(bool, UseCompressedKlassPointers, false, \ 445 "Use 32-bit klass pointers in 64-bit VM " \ 446 "lp64_product means flag is always constant in 32 bit VM") \ 447 \ 448 notproduct(bool, CheckCompressedOops, true, \ 449 "generate checks in encoding/decoding code in debug VM") \ 450 \ 451 product_pd(uintx, HeapBaseMinAddress, \ 452 "OS specific low limit for heap base address") \ 453 \ 454 diagnostic(bool, PrintCompressedOopsMode, false, \ 455 "Print compressed oops base address and encoding mode") \ 456 \ 457 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 458 "Default object alignment in bytes, 8 is minimum") \ 459 \ 460 product(bool, AssumeMP, false, \ 461 "Instruct the VM to assume multiple processors are available") \ 462 \ 463 /* UseMembar is theoretically a temp flag used for memory barrier \ 464 * removal testing. It was supposed to be removed before FCS but has \ 465 * been re-added (see 6401008) */ \ 466 product_pd(bool, UseMembar, \ 467 "(Unstable) Issues membars on thread state transitions") \ 468 \ 469 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 470 * that don't support it. This will be replaced by processor detection \ 471 * logic. \ 472 */ \ 473 product(bool, UsePPCLWSYNC, true, \ 474 "Use lwsync instruction if true, else use slower sync") \ 475 \ 476 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 477 "Whether to clean the chunk pool asynchronously") \ 478 \ 479 /* Temporary: See 6948537 */ \ 480 experimental(bool, UseMemSetInBOT, true, \ 481 "(Unstable) uses memset in BOT updates in GC code") \ 482 \ 483 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 484 "Enable normal processing of flags relating to field diagnostics")\ 485 \ 486 experimental(bool, UnlockExperimentalVMOptions, false, \ 487 "Enable normal processing of flags relating to experimental features")\ 488 \ 489 product(bool, JavaMonitorsInStackTrace, true, \ 490 "Print info. about Java monitor locks when the stacks are dumped")\ 491 \ 492 product_pd(bool, UseLargePages, \ 493 "Use large page memory") \ 494 \ 495 product_pd(bool, UseLargePagesIndividualAllocation, \ 496 "Allocate large pages individually for better affinity") \ 497 \ 498 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 499 "Fail large pages individual allocation") \ 500 \ 501 develop(bool, TracePageSizes, false, \ 502 "Trace page size selection and usage.") \ 503 \ 504 product(bool, UseNUMA, false, \ 505 "Use NUMA if available") \ 506 \ 507 product(bool, UseNUMAInterleaving, false, \ 508 "Interleave memory across NUMA nodes if available") \ 509 \ 510 product(uintx, NUMAInterleaveGranularity, 2*M, \ 511 "Granularity to use for NUMA interleaving on Windows OS") \ 512 \ 513 product(bool, ForceNUMA, false, \ 514 "Force NUMA optimizations on single-node/UMA systems") \ 515 \ 516 product(uintx, NUMAChunkResizeWeight, 20, \ 517 "Percentage (0-100) used to weigh the current sample when " \ 518 "computing exponentially decaying average for " \ 519 "AdaptiveNUMAChunkSizing") \ 520 \ 521 product(uintx, NUMASpaceResizeRate, 1*G, \ 522 "Do not reallocate more that this amount per collection") \ 523 \ 524 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 525 "Enable adaptive chunk sizing for NUMA") \ 526 \ 527 product(bool, NUMAStats, false, \ 528 "Print NUMA stats in detailed heap information") \ 529 \ 530 product(uintx, NUMAPageScanRate, 256, \ 531 "Maximum number of pages to include in the page scan procedure") \ 532 \ 533 product_pd(bool, NeedsDeoptSuspend, \ 534 "True for register window machines (sparc/ia64)") \ 535 \ 536 product(intx, UseSSE, 99, \ 537 "Highest supported SSE instructions set on x86/x64") \ 538 \ 539 product(bool, UseAES, false, \ 540 "Control whether AES instructions can be used on x86/x64") \ 541 \ 542 product(uintx, LargePageSizeInBytes, 0, \ 543 "Large page size (0 to let VM choose the page size") \ 544 \ 545 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 546 "Use large pages if max heap is at least this big") \ 547 \ 548 product(bool, ForceTimeHighResolution, false, \ 549 "Using high time resolution(For Win32 only)") \ 550 \ 551 develop(bool, TraceItables, false, \ 552 "Trace initialization and use of itables") \ 553 \ 554 develop(bool, TracePcPatching, false, \ 555 "Trace usage of frame::patch_pc") \ 556 \ 557 develop(bool, TraceJumps, false, \ 558 "Trace assembly jumps in thread ring buffer") \ 559 \ 560 develop(bool, TraceRelocator, false, \ 561 "Trace the bytecode relocator") \ 562 \ 563 develop(bool, TraceLongCompiles, false, \ 564 "Print out every time compilation is longer than " \ 565 "a given threashold") \ 566 \ 567 develop(bool, SafepointALot, false, \ 568 "Generates a lot of safepoints. Works with " \ 569 "GuaranteedSafepointInterval") \ 570 \ 571 product_pd(bool, BackgroundCompilation, \ 572 "A thread requesting compilation is not blocked during " \ 573 "compilation") \ 574 \ 575 product(bool, PrintVMQWaitTime, false, \ 576 "Prints out the waiting time in VM operation queue") \ 577 \ 578 develop(bool, NoYieldsInMicrolock, false, \ 579 "Disable yields in microlock") \ 580 \ 581 develop(bool, TraceOopMapGeneration, false, \ 582 "Shows oopmap generation") \ 583 \ 584 product(bool, MethodFlushing, true, \ 585 "Reclamation of zombie and not-entrant methods") \ 586 \ 587 develop(bool, VerifyStack, false, \ 588 "Verify stack of each thread when it is entering a runtime call") \ 589 \ 590 diagnostic(bool, ForceUnreachable, false, \ 591 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 592 \ 593 notproduct(bool, StressDerivedPointers, false, \ 594 "Force scavenge when a derived pointers is detected on stack " \ 595 "after rtm call") \ 596 \ 597 develop(bool, TraceDerivedPointers, false, \ 598 "Trace traversal of derived pointers on stack") \ 599 \ 600 notproduct(bool, TraceCodeBlobStacks, false, \ 601 "Trace stack-walk of codeblobs") \ 602 \ 603 product(bool, PrintJNIResolving, false, \ 604 "Used to implement -v:jni") \ 605 \ 606 notproduct(bool, PrintRewrites, false, \ 607 "Print methods that are being rewritten") \ 608 \ 609 product(bool, UseInlineCaches, true, \ 610 "Use Inline Caches for virtual calls ") \ 611 \ 612 develop(bool, InlineArrayCopy, true, \ 613 "inline arraycopy native that is known to be part of " \ 614 "base library DLL") \ 615 \ 616 develop(bool, InlineObjectHash, true, \ 617 "inline Object::hashCode() native that is known to be part " \ 618 "of base library DLL") \ 619 \ 620 develop(bool, InlineNatives, true, \ 621 "inline natives that are known to be part of base library DLL") \ 622 \ 623 develop(bool, InlineMathNatives, true, \ 624 "inline SinD, CosD, etc.") \ 625 \ 626 develop(bool, InlineClassNatives, true, \ 627 "inline Class.isInstance, etc") \ 628 \ 629 develop(bool, InlineThreadNatives, true, \ 630 "inline Thread.currentThread, etc") \ 631 \ 632 develop(bool, InlineUnsafeOps, true, \ 633 "inline memory ops (native methods) from sun.misc.Unsafe") \ 634 \ 635 product(bool, CriticalJNINatives, true, \ 636 "check for critical JNI entry points") \ 637 \ 638 notproduct(bool, StressCriticalJNINatives, false, \ 639 "Exercise register saving code in critical natives") \ 640 \ 641 product(bool, UseSSE42Intrinsics, false, \ 642 "SSE4.2 versions of intrinsics") \ 643 \ 644 product(bool, UseAESIntrinsics, false, \ 645 "use intrinsics for AES versions of crypto") \ 646 \ 647 develop(bool, TraceCallFixup, false, \ 648 "traces all call fixups") \ 649 \ 650 develop(bool, DeoptimizeALot, false, \ 651 "deoptimize at every exit from the runtime system") \ 652 \ 653 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 654 "a comma separated list of bcis to deoptimize at") \ 655 \ 656 product(bool, DeoptimizeRandom, false, \ 657 "deoptimize random frames on random exit from the runtime system")\ 658 \ 659 notproduct(bool, ZombieALot, false, \ 660 "creates zombies (non-entrant) at exit from the runt. system") \ 661 \ 662 product(bool, UnlinkSymbolsALot, false, \ 663 "unlink unreferenced symbols from the symbol table at safepoints")\ 664 \ 665 notproduct(bool, WalkStackALot, false, \ 666 "trace stack (no print) at every exit from the runtime system") \ 667 \ 668 product(bool, Debugging, false, \ 669 "set when executing debug methods in debug.ccp " \ 670 "(to prevent triggering assertions)") \ 671 \ 672 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 673 "Enable strict checks that safepoints cannot happen for threads " \ 674 "that used No_Safepoint_Verifier") \ 675 \ 676 notproduct(bool, VerifyLastFrame, false, \ 677 "Verify oops on last frame on entry to VM") \ 678 \ 679 develop(bool, TraceHandleAllocation, false, \ 680 "Prints out warnings when suspicious many handles are allocated") \ 681 \ 682 product(bool, UseCompilerSafepoints, true, \ 683 "Stop at safepoints in compiled code") \ 684 \ 685 product(bool, FailOverToOldVerifier, true, \ 686 "fail over to old verifier when split verifier fails") \ 687 \ 688 develop(bool, ShowSafepointMsgs, false, \ 689 "Show msg. about safepoint synch.") \ 690 \ 691 product(bool, SafepointTimeout, false, \ 692 "Time out and warn or fail after SafepointTimeoutDelay " \ 693 "milliseconds if failed to reach safepoint") \ 694 \ 695 develop(bool, DieOnSafepointTimeout, false, \ 696 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 697 \ 698 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 699 /* typically, at most a few retries are needed */ \ 700 product(intx, SuspendRetryCount, 50, \ 701 "Maximum retry count for an external suspend request") \ 702 \ 703 product(intx, SuspendRetryDelay, 5, \ 704 "Milliseconds to delay per retry (* current_retry_count)") \ 705 \ 706 product(bool, AssertOnSuspendWaitFailure, false, \ 707 "Assert/Guarantee on external suspend wait failure") \ 708 \ 709 product(bool, TraceSuspendWaitFailures, false, \ 710 "Trace external suspend wait failures") \ 711 \ 712 product(bool, MaxFDLimit, true, \ 713 "Bump the number of file descriptors to max in solaris.") \ 714 \ 715 diagnostic(bool, LogEvents, true, \ 716 "Enable the various ring buffer event logs") \ 717 \ 718 diagnostic(uintx, LogEventsBufferEntries, 10, \ 719 "Enable the various ring buffer event logs") \ 720 \ 721 product(bool, BytecodeVerificationRemote, true, \ 722 "Enables the Java bytecode verifier for remote classes") \ 723 \ 724 product(bool, BytecodeVerificationLocal, false, \ 725 "Enables the Java bytecode verifier for local classes") \ 726 \ 727 develop(bool, ForceFloatExceptions, trueInDebug, \ 728 "Force exceptions on FP stack under/overflow") \ 729 \ 730 develop(bool, VerifyStackAtCalls, false, \ 731 "Verify that the stack pointer is unchanged after calls") \ 732 \ 733 develop(bool, TraceJavaAssertions, false, \ 734 "Trace java language assertions") \ 735 \ 736 notproduct(bool, CheckAssertionStatusDirectives, false, \ 737 "temporary - see javaClasses.cpp") \ 738 \ 739 notproduct(bool, PrintMallocFree, false, \ 740 "Trace calls to C heap malloc/free allocation") \ 741 \ 742 product(bool, PrintOopAddress, false, \ 743 "Always print the location of the oop") \ 744 \ 745 notproduct(bool, VerifyCodeCacheOften, false, \ 746 "Verify compiled-code cache often") \ 747 \ 748 develop(bool, ZapDeadCompiledLocals, false, \ 749 "Zap dead locals in compiler frames") \ 750 \ 751 notproduct(bool, ZapDeadLocalsOld, false, \ 752 "Zap dead locals (old version, zaps all frames when " \ 753 "entering the VM") \ 754 \ 755 notproduct(bool, CheckOopishValues, false, \ 756 "Warn if value contains oop ( requires ZapDeadLocals)") \ 757 \ 758 develop(bool, UseMallocOnly, false, \ 759 "use only malloc/free for allocation (no resource area/arena)") \ 760 \ 761 develop(bool, PrintMalloc, false, \ 762 "print all malloc/free calls") \ 763 \ 764 develop(bool, PrintMallocStatistics, false, \ 765 "print malloc/free statistics") \ 766 \ 767 develop(bool, ZapResourceArea, trueInDebug, \ 768 "Zap freed resource/arena space with 0xABABABAB") \ 769 \ 770 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 771 "Zap freed VM handle space with 0xBCBCBCBC") \ 772 \ 773 develop(bool, ZapJNIHandleArea, trueInDebug, \ 774 "Zap freed JNI handle space with 0xFEFEFEFE") \ 775 \ 776 notproduct(bool, ZapStackSegments, trueInDebug, \ 777 "Zap allocated/freed Stack segments with 0xFADFADED") \ 778 \ 779 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 780 "Zap unused heap space with 0xBAADBABE") \ 781 \ 782 develop(bool, TraceZapUnusedHeapArea, false, \ 783 "Trace zapping of unused heap space") \ 784 \ 785 develop(bool, CheckZapUnusedHeapArea, false, \ 786 "Check zapping of unused heap space") \ 787 \ 788 develop(bool, ZapFillerObjects, trueInDebug, \ 789 "Zap filler objects with 0xDEAFBABE") \ 790 \ 791 develop(bool, PrintVMMessages, true, \ 792 "Print vm messages on console") \ 793 \ 794 product(bool, PrintGCApplicationConcurrentTime, false, \ 795 "Print the time the application has been running") \ 796 \ 797 product(bool, PrintGCApplicationStoppedTime, false, \ 798 "Print the time the application has been stopped") \ 799 \ 800 diagnostic(bool, VerboseVerification, false, \ 801 "Display detailed verification details") \ 802 \ 803 notproduct(uintx, ErrorHandlerTest, 0, \ 804 "If > 0, provokes an error after VM initialization; the value" \ 805 "determines which error to provoke. See test_error_handler()" \ 806 "in debug.cpp.") \ 807 \ 808 develop(bool, Verbose, false, \ 809 "Prints additional debugging information from other modes") \ 810 \ 811 develop(bool, PrintMiscellaneous, false, \ 812 "Prints uncategorized debugging information (requires +Verbose)") \ 813 \ 814 develop(bool, WizardMode, false, \ 815 "Prints much more debugging information") \ 816 \ 817 product(bool, ShowMessageBoxOnError, false, \ 818 "Keep process alive on VM fatal error") \ 819 \ 820 product(bool, CreateMinidumpOnCrash, false, \ 821 "Create minidump on VM fatal error") \ 822 \ 823 product_pd(bool, UseOSErrorReporting, \ 824 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 825 \ 826 product(bool, SuppressFatalErrorMessage, false, \ 827 "Do NO Fatal Error report [Avoid deadlock]") \ 828 \ 829 product(ccstrlist, OnError, "", \ 830 "Run user-defined commands on fatal error; see VMError.cpp " \ 831 "for examples") \ 832 \ 833 product(ccstrlist, OnOutOfMemoryError, "", \ 834 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 835 \ 836 manageable(bool, HeapDumpBeforeFullGC, false, \ 837 "Dump heap to file before any major stop-world GC") \ 838 \ 839 manageable(bool, HeapDumpAfterFullGC, false, \ 840 "Dump heap to file after any major stop-world GC") \ 841 \ 842 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 843 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 844 \ 845 manageable(ccstr, HeapDumpPath, NULL, \ 846 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 847 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 848 "in the working directory)") \ 849 \ 850 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 851 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 852 "when the heap usage is larger than this") \ 853 \ 854 develop(uintx, HeapDumpSegmentSize, 1*G, \ 855 "Approximate segment size when generating a segmented heap dump") \ 856 \ 857 develop(bool, BreakAtWarning, false, \ 858 "Execute breakpoint upon encountering VM warning") \ 859 \ 860 develop(bool, TraceVMOperation, false, \ 861 "Trace vm operations") \ 862 \ 863 develop(bool, UseFakeTimers, false, \ 864 "Tells whether the VM should use system time or a fake timer") \ 865 \ 866 product(ccstr, NativeMemoryTracking, "off", \ 867 "Native memory tracking options") \ 868 \ 869 diagnostic(bool, PrintNMTStatistics, false, \ 870 "Print native memory tracking summary data if it is on") \ 871 \ 872 diagnostic(bool, AutoShutdownNMT, true, \ 873 "Automatically shutdown native memory tracking under stress " \ 874 "situation. When set to false, native memory tracking tries to " \ 875 "stay alive at the expense of JVM performance") \ 876 \ 877 diagnostic(bool, LogCompilation, false, \ 878 "Log compilation activity in detail to hotspot.log or LogFile") \ 879 \ 880 product(bool, PrintCompilation, false, \ 881 "Print compilations") \ 882 \ 883 diagnostic(bool, TraceNMethodInstalls, false, \ 884 "Trace nmethod intallation") \ 885 \ 886 diagnostic(intx, ScavengeRootsInCode, 2, \ 887 "0: do not allow scavengable oops in the code cache; " \ 888 "1: allow scavenging from the code cache; " \ 889 "2: emit as many constants as the compiler can see") \ 890 \ 891 product(bool, AlwaysRestoreFPU, false, \ 892 "Restore the FPU control word after every JNI call (expensive)") \ 893 \ 894 diagnostic(bool, PrintCompilation2, false, \ 895 "Print additional statistics per compilation") \ 896 \ 897 diagnostic(bool, PrintAdapterHandlers, false, \ 898 "Print code generated for i2c/c2i adapters") \ 899 \ 900 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 901 "Verify that i2c/c2i adapters are called properly") \ 902 \ 903 develop(bool, VerifyAdapterSharing, false, \ 904 "Verify that the code for shared adapters is the equivalent") \ 905 \ 906 diagnostic(bool, PrintAssembly, false, \ 907 "Print assembly code (using external disassembler.so)") \ 908 \ 909 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 910 "Options string passed to disassembler.so") \ 911 \ 912 diagnostic(bool, PrintNMethods, false, \ 913 "Print assembly code for nmethods when generated") \ 914 \ 915 diagnostic(bool, PrintNativeNMethods, false, \ 916 "Print assembly code for native nmethods when generated") \ 917 \ 918 develop(bool, PrintDebugInfo, false, \ 919 "Print debug information for all nmethods when generated") \ 920 \ 921 develop(bool, PrintRelocations, false, \ 922 "Print relocation information for all nmethods when generated") \ 923 \ 924 develop(bool, PrintDependencies, false, \ 925 "Print dependency information for all nmethods when generated") \ 926 \ 927 develop(bool, PrintExceptionHandlers, false, \ 928 "Print exception handler tables for all nmethods when generated") \ 929 \ 930 develop(bool, StressCompiledExceptionHandlers, false, \ 931 "Exercise compiled exception handlers") \ 932 \ 933 develop(bool, InterceptOSException, false, \ 934 "Starts debugger when an implicit OS (e.g., NULL) " \ 935 "exception happens") \ 936 \ 937 product(bool, PrintCodeCache, false, \ 938 "Print the code cache memory usage when exiting") \ 939 \ 940 develop(bool, PrintCodeCache2, false, \ 941 "Print detailed usage info on the code cache when exiting") \ 942 \ 943 product(bool, PrintCodeCacheOnCompilation, false, \ 944 "Print the code cache memory usage each time a method is compiled") \ 945 \ 946 diagnostic(bool, PrintStubCode, false, \ 947 "Print generated stub code") \ 948 \ 949 product(bool, StackTraceInThrowable, true, \ 950 "Collect backtrace in throwable when exception happens") \ 951 \ 952 product(bool, OmitStackTraceInFastThrow, true, \ 953 "Omit backtraces for some 'hot' exceptions in optimized code") \ 954 \ 955 product(bool, ProfilerPrintByteCodeStatistics, false, \ 956 "Prints byte code statictics when dumping profiler output") \ 957 \ 958 product(bool, ProfilerRecordPC, false, \ 959 "Collects tick for each 16 byte interval of compiled code") \ 960 \ 961 product(bool, ProfileVM, false, \ 962 "Profiles ticks that fall within VM (either in the VM Thread " \ 963 "or VM code called through stubs)") \ 964 \ 965 product(bool, ProfileIntervals, false, \ 966 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 967 \ 968 notproduct(bool, ProfilerCheckIntervals, false, \ 969 "Collect and print info on spacing of profiler ticks") \ 970 \ 971 develop(bool, PrintJVMWarnings, false, \ 972 "Prints warnings for unimplemented JVM functions") \ 973 \ 974 product(bool, PrintWarnings, true, \ 975 "Prints JVM warnings to output stream") \ 976 \ 977 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 978 "Prints warnings for stalled SpinLocks") \ 979 \ 980 product(bool, RegisterFinalizersAtInit, true, \ 981 "Register finalizable objects at end of Object.<init> or " \ 982 "after allocation") \ 983 \ 984 develop(bool, RegisterReferences, true, \ 985 "Tells whether the VM should register soft/weak/final/phantom " \ 986 "references") \ 987 \ 988 develop(bool, IgnoreRewrites, false, \ 989 "Supress rewrites of bytecodes in the oopmap generator. " \ 990 "This is unsafe!") \ 991 \ 992 develop(bool, PrintCodeCacheExtension, false, \ 993 "Print extension of code cache") \ 994 \ 995 develop(bool, UsePrivilegedStack, true, \ 996 "Enable the security JVM functions") \ 997 \ 998 develop(bool, ProtectionDomainVerification, true, \ 999 "Verifies protection domain before resolution in system " \ 1000 "dictionary") \ 1001 \ 1002 product(bool, ClassUnloading, true, \ 1003 "Do unloading of classes") \ 1004 \ 1005 develop(bool, DisableStartThread, false, \ 1006 "Disable starting of additional Java threads " \ 1007 "(for debugging only)") \ 1008 \ 1009 develop(bool, MemProfiling, false, \ 1010 "Write memory usage profiling to log file") \ 1011 \ 1012 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1013 "Prints the system dictionary at exit") \ 1014 \ 1015 experimental(intx, PredictedLoadedClassCount, 0, \ 1016 "Experimental: Tune loaded class cache starting size.") \ 1017 \ 1018 diagnostic(bool, UnsyncloadClass, false, \ 1019 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1020 "class loader must call VM synchronized for findClass " \ 1021 "and defineClass.") \ 1022 \ 1023 product(bool, AlwaysLockClassLoader, false, \ 1024 "Require the VM to acquire the class loader lock before calling " \ 1025 "loadClass() even for class loaders registering " \ 1026 "as parallel capable") \ 1027 \ 1028 product(bool, AllowParallelDefineClass, false, \ 1029 "Allow parallel defineClass requests for class loaders " \ 1030 "registering as parallel capable") \ 1031 \ 1032 product(bool, MustCallLoadClassInternal, false, \ 1033 "Call loadClassInternal() rather than loadClass()") \ 1034 \ 1035 product_pd(bool, DontYieldALot, \ 1036 "Throw away obvious excess yield calls (for SOLARIS only)") \ 1037 \ 1038 product_pd(bool, ConvertSleepToYield, \ 1039 "Converts sleep(0) to thread yield " \ 1040 "(may be off for SOLARIS to improve GUI)") \ 1041 \ 1042 product(bool, ConvertYieldToSleep, false, \ 1043 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 1044 "behavior (SOLARIS only)") \ 1045 \ 1046 product(bool, UseBoundThreads, true, \ 1047 "Bind user level threads to kernel threads (for SOLARIS only)") \ 1048 \ 1049 develop(bool, UseDetachedThreads, true, \ 1050 "Use detached threads that are recycled upon termination " \ 1051 "(for SOLARIS only)") \ 1052 \ 1053 product(bool, UseLWPSynchronization, true, \ 1054 "Use LWP-based instead of libthread-based synchronization " \ 1055 "(SPARC only)") \ 1056 \ 1057 product(ccstr, SyncKnobs, NULL, \ 1058 "(Unstable) Various monitor synchronization tunables") \ 1059 \ 1060 product(intx, EmitSync, 0, \ 1061 "(Unsafe,Unstable) " \ 1062 " Controls emission of inline sync fast-path code") \ 1063 \ 1064 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1065 \ 1066 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1067 \ 1068 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 1069 \ 1070 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 1071 \ 1072 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 1073 \ 1074 product(intx, hashCode, 5, \ 1075 "(Unstable) select hashCode generation algorithm" ) \ 1076 \ 1077 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1078 "(Unstable, Linux-specific)" \ 1079 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 1080 \ 1081 product(bool, FilterSpuriousWakeups, true, \ 1082 "Prevent spurious or premature wakeups from object.wait " \ 1083 "(Solaris only)") \ 1084 \ 1085 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1086 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1087 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1088 \ 1089 develop(bool, UsePthreads, false, \ 1090 "Use pthread-based instead of libthread-based synchronization " \ 1091 "(SPARC only)") \ 1092 \ 1093 product(bool, AdjustConcurrency, false, \ 1094 "call thr_setconcurrency at thread create time to avoid " \ 1095 "LWP starvation on MP systems (For Solaris Only)") \ 1096 \ 1097 product(bool, ReduceSignalUsage, false, \ 1098 "Reduce the use of OS signals in Java and/or the VM") \ 1099 \ 1100 develop_pd(bool, ShareVtableStubs, \ 1101 "Share vtable stubs (smaller code but worse branch prediction") \ 1102 \ 1103 develop(bool, LoadLineNumberTables, true, \ 1104 "Tells whether the class file parser loads line number tables") \ 1105 \ 1106 develop(bool, LoadLocalVariableTables, true, \ 1107 "Tells whether the class file parser loads local variable tables")\ 1108 \ 1109 develop(bool, LoadLocalVariableTypeTables, true, \ 1110 "Tells whether the class file parser loads local variable type tables")\ 1111 \ 1112 product(bool, AllowUserSignalHandlers, false, \ 1113 "Do not complain if the application installs signal handlers " \ 1114 "(Solaris & Linux only)") \ 1115 \ 1116 product(bool, UseSignalChaining, true, \ 1117 "Use signal-chaining to invoke signal handlers installed " \ 1118 "by the application (Solaris & Linux only)") \ 1119 \ 1120 product(bool, UseAltSigs, false, \ 1121 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1122 "internal signals (Solaris only)") \ 1123 \ 1124 product(bool, AllowJNIEnvProxy, false, \ 1125 "Allow JNIEnv proxies for jdbx") \ 1126 \ 1127 product(bool, JNIDetachReleasesMonitors, true, \ 1128 "JNI DetachCurrentThread releases monitors owned by thread") \ 1129 \ 1130 product(bool, RestoreMXCSROnJNICalls, false, \ 1131 "Restore MXCSR when returning from JNI calls") \ 1132 \ 1133 product(bool, CheckJNICalls, false, \ 1134 "Verify all arguments to JNI calls") \ 1135 \ 1136 product(bool, UseFastJNIAccessors, true, \ 1137 "Use optimized versions of Get<Primitive>Field") \ 1138 \ 1139 product(bool, EagerXrunInit, false, \ 1140 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1141 " but not all -Xrun libraries may support the state of the VM at this time") \ 1142 \ 1143 product(bool, PreserveAllAnnotations, false, \ 1144 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1145 \ 1146 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1147 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1148 \ 1149 product(bool, LazyBootClassLoader, true, \ 1150 "Enable/disable lazy opening of boot class path entries") \ 1151 \ 1152 product(bool, UseXMMForArrayCopy, false, \ 1153 "Use SSE2 MOVQ instruction for Arraycopy") \ 1154 \ 1155 product(intx, FieldsAllocationStyle, 1, \ 1156 "0 - type based with oops first, 1 - with oops last, " \ 1157 "2 - oops in super and sub classes are together") \ 1158 \ 1159 product(bool, CompactFields, true, \ 1160 "Allocate nonstatic fields in gaps between previous fields") \ 1161 \ 1162 notproduct(bool, PrintFieldLayout, false, \ 1163 "Print field layout for each class") \ 1164 \ 1165 product(intx, ContendedPaddingWidth, 128, \ 1166 "How many bytes to pad the fields/classes marked @Contended with")\ 1167 \ 1168 product(bool, EnableContended, true, \ 1169 "Enable @Contended annotation support") \ 1170 \ 1171 product(bool, RestrictContended, true, \ 1172 "Restrict @Contended to trusted classes") \ 1173 \ 1174 product(bool, UseBiasedLocking, true, \ 1175 "Enable biased locking in JVM") \ 1176 \ 1177 product(intx, BiasedLockingStartupDelay, 4000, \ 1178 "Number of milliseconds to wait before enabling biased locking") \ 1179 \ 1180 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1181 "Print statistics of biased locking in JVM") \ 1182 \ 1183 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1184 "Threshold of number of revocations per type to try to " \ 1185 "rebias all objects in the heap of that type") \ 1186 \ 1187 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1188 "Threshold of number of revocations per type to permanently " \ 1189 "revoke biases of all objects in the heap of that type") \ 1190 \ 1191 product(intx, BiasedLockingDecayTime, 25000, \ 1192 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1193 "type after previous bulk rebias") \ 1194 \ 1195 /* tracing */ \ 1196 \ 1197 notproduct(bool, TraceRuntimeCalls, false, \ 1198 "Trace run-time calls") \ 1199 \ 1200 develop(bool, TraceJNICalls, false, \ 1201 "Trace JNI calls") \ 1202 \ 1203 notproduct(bool, TraceJVMCalls, false, \ 1204 "Trace JVM calls") \ 1205 \ 1206 product(ccstr, TraceJVMTI, NULL, \ 1207 "Trace flags for JVMTI functions and events") \ 1208 \ 1209 /* This option can change an EMCP method into an obsolete method. */ \ 1210 /* This can affect tests that except specific methods to be EMCP. */ \ 1211 /* This option should be used with caution. */ \ 1212 product(bool, StressLdcRewrite, false, \ 1213 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1214 \ 1215 product(intx, TraceRedefineClasses, 0, \ 1216 "Trace level for JVMTI RedefineClasses") \ 1217 \ 1218 develop(bool, StressMethodComparator, false, \ 1219 "run the MethodComparator on all loaded methods") \ 1220 \ 1221 /* change to false by default sometime after Mustang */ \ 1222 product(bool, VerifyMergedCPBytecodes, true, \ 1223 "Verify bytecodes after RedefineClasses constant pool merging") \ 1224 \ 1225 develop(bool, TraceJNIHandleAllocation, false, \ 1226 "Trace allocation/deallocation of JNI handle blocks") \ 1227 \ 1228 develop(bool, TraceThreadEvents, false, \ 1229 "Trace all thread events") \ 1230 \ 1231 develop(bool, TraceBytecodes, false, \ 1232 "Trace bytecode execution") \ 1233 \ 1234 develop(bool, TraceClassInitialization, false, \ 1235 "Trace class initialization") \ 1236 \ 1237 develop(bool, TraceExceptions, false, \ 1238 "Trace exceptions") \ 1239 \ 1240 develop(bool, TraceICs, false, \ 1241 "Trace inline cache changes") \ 1242 \ 1243 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1244 "Trace method invocation counter overflow") \ 1245 \ 1246 develop(bool, TraceInlineCacheClearing, false, \ 1247 "Trace clearing of inline caches in nmethods") \ 1248 \ 1249 develop(bool, TraceDependencies, false, \ 1250 "Trace dependencies") \ 1251 \ 1252 develop(bool, VerifyDependencies, trueInDebug, \ 1253 "Exercise and verify the compilation dependency mechanism") \ 1254 \ 1255 develop(bool, TraceNewOopMapGeneration, false, \ 1256 "Trace OopMapGeneration") \ 1257 \ 1258 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1259 "Trace OopMapGeneration: print detailed cell states") \ 1260 \ 1261 develop(bool, TimeOopMap, false, \ 1262 "Time calls to GenerateOopMap::compute_map() in sum") \ 1263 \ 1264 develop(bool, TimeOopMap2, false, \ 1265 "Time calls to GenerateOopMap::compute_map() individually") \ 1266 \ 1267 develop(bool, TraceMonitorMismatch, false, \ 1268 "Trace monitor matching failures during OopMapGeneration") \ 1269 \ 1270 develop(bool, TraceOopMapRewrites, false, \ 1271 "Trace rewritting of method oops during oop map generation") \ 1272 \ 1273 develop(bool, TraceSafepoint, false, \ 1274 "Trace safepoint operations") \ 1275 \ 1276 develop(bool, TraceICBuffer, false, \ 1277 "Trace usage of IC buffer") \ 1278 \ 1279 develop(bool, TraceCompiledIC, false, \ 1280 "Trace changes of compiled IC") \ 1281 \ 1282 notproduct(bool, TraceZapDeadLocals, false, \ 1283 "Trace zapping dead locals") \ 1284 \ 1285 develop(bool, TraceStartupTime, false, \ 1286 "Trace setup time") \ 1287 \ 1288 develop(bool, TraceProtectionDomainVerification, false, \ 1289 "Trace protection domain verifcation") \ 1290 \ 1291 develop(bool, TraceClearedExceptions, false, \ 1292 "Prints when an exception is forcibly cleared") \ 1293 \ 1294 product(bool, TraceClassResolution, false, \ 1295 "Trace all constant pool resolutions (for debugging)") \ 1296 \ 1297 product(bool, TraceBiasedLocking, false, \ 1298 "Trace biased locking in JVM") \ 1299 \ 1300 product(bool, TraceMonitorInflation, false, \ 1301 "Trace monitor inflation in JVM") \ 1302 \ 1303 /* gc */ \ 1304 \ 1305 product(bool, UseSerialGC, false, \ 1306 "Use the serial garbage collector") \ 1307 \ 1308 product(bool, UseG1GC, false, \ 1309 "Use the Garbage-First garbage collector") \ 1310 \ 1311 product(bool, UseParallelGC, false, \ 1312 "Use the Parallel Scavenge garbage collector") \ 1313 \ 1314 product(bool, UseParallelOldGC, false, \ 1315 "Use the Parallel Old garbage collector") \ 1316 \ 1317 product(uintx, HeapMaximumCompactionInterval, 20, \ 1318 "How often should we maximally compact the heap (not allowing " \ 1319 "any dead space)") \ 1320 \ 1321 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1322 "The collection count for the first maximum compaction") \ 1323 \ 1324 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1325 "In the Parallel Old garbage collector maximum compaction for " \ 1326 "a system GC") \ 1327 \ 1328 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1329 "The mean used by the par compact dead wood" \ 1330 "limiter (a number between 0-100).") \ 1331 \ 1332 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1333 "The standard deviation used by the par compact dead wood" \ 1334 "limiter (a number between 0-100).") \ 1335 \ 1336 product(uintx, ParallelGCThreads, 0, \ 1337 "Number of parallel threads parallel gc will use") \ 1338 \ 1339 product(bool, UseDynamicNumberOfGCThreads, false, \ 1340 "Dynamically choose the number of parallel threads " \ 1341 "parallel gc will use") \ 1342 \ 1343 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1344 "Force dynamic selection of the number of" \ 1345 "parallel threads parallel gc will use to aid debugging") \ 1346 \ 1347 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1348 "Size of heap (bytes) per GC thread used in calculating the " \ 1349 "number of GC threads") \ 1350 \ 1351 product(bool, TraceDynamicGCThreads, false, \ 1352 "Trace the dynamic GC thread usage") \ 1353 \ 1354 develop(bool, ParallelOldGCSplitALot, false, \ 1355 "Provoke splitting (copying data from a young gen space to" \ 1356 "multiple destination spaces)") \ 1357 \ 1358 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1359 "How often to provoke splitting a young gen space") \ 1360 \ 1361 product(uintx, ConcGCThreads, 0, \ 1362 "Number of threads concurrent gc will use") \ 1363 \ 1364 product(uintx, YoungPLABSize, 4096, \ 1365 "Size of young gen promotion labs (in HeapWords)") \ 1366 \ 1367 product(uintx, OldPLABSize, 1024, \ 1368 "Size of old gen promotion labs (in HeapWords)") \ 1369 \ 1370 product(uintx, GCTaskTimeStampEntries, 200, \ 1371 "Number of time stamp entries per gc worker thread") \ 1372 \ 1373 product(bool, AlwaysTenure, false, \ 1374 "Always tenure objects in eden. (ParallelGC only)") \ 1375 \ 1376 product(bool, NeverTenure, false, \ 1377 "Never tenure objects in eden, May tenure on overflow " \ 1378 "(ParallelGC only)") \ 1379 \ 1380 product(bool, ScavengeBeforeFullGC, true, \ 1381 "Scavenge youngest generation before each full GC, " \ 1382 "used with UseParallelGC") \ 1383 \ 1384 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1385 "Allow scavenges to occur when to_space contains objects.") \ 1386 \ 1387 product(bool, UseConcMarkSweepGC, false, \ 1388 "Use Concurrent Mark-Sweep GC in the old generation") \ 1389 \ 1390 product(bool, ExplicitGCInvokesConcurrent, false, \ 1391 "A System.gc() request invokes a concurrent collection;" \ 1392 " (effective only when UseConcMarkSweepGC)") \ 1393 \ 1394 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1395 "A System.gc() request invokes a concurrent collection and " \ 1396 "also unloads classes during such a concurrent gc cycle " \ 1397 "(effective only when UseConcMarkSweepGC)") \ 1398 \ 1399 product(bool, GCLockerInvokesConcurrent, false, \ 1400 "The exit of a JNI CS necessitating a scavenge also" \ 1401 " kicks off a bkgrd concurrent collection") \ 1402 \ 1403 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1404 "How much the GC can expand the eden by while the GC locker " \ 1405 "is active (as a percentage)") \ 1406 \ 1407 diagnostic(intx, GCLockerRetryAllocationCount, 2, \ 1408 "Number of times to retry allocations when" \ 1409 " blocked by the GC locker") \ 1410 \ 1411 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1412 "Use Adaptive Free Lists in the CMS generation") \ 1413 \ 1414 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1415 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1416 \ 1417 develop(bool, RotateCMSCollectionTypes, false, \ 1418 "Rotate the CMS collections among concurrent and STW") \ 1419 \ 1420 product(bool, UseCMSBestFit, true, \ 1421 "Use CMS best fit allocation strategy") \ 1422 \ 1423 product(bool, UseCMSCollectionPassing, true, \ 1424 "Use passing of collection from background to foreground") \ 1425 \ 1426 product(bool, UseParNewGC, false, \ 1427 "Use parallel threads in the new generation.") \ 1428 \ 1429 product(bool, ParallelGCVerbose, false, \ 1430 "Verbose output for parallel GC.") \ 1431 \ 1432 product(uintx, ParallelGCBufferWastePct, 10, \ 1433 "Wasted fraction of parallel allocation buffer.") \ 1434 \ 1435 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1436 "Retain parallel allocation buffers across scavenges; " \ 1437 " -- disabled because this currently conflicts with " \ 1438 " parallel card scanning under certain conditions ") \ 1439 \ 1440 product(uintx, TargetPLABWastePct, 10, \ 1441 "Target wasted space in last buffer as percent of overall " \ 1442 "allocation") \ 1443 \ 1444 product(uintx, PLABWeight, 75, \ 1445 "Percentage (0-100) used to weight the current sample when" \ 1446 "computing exponentially decaying average for ResizePLAB.") \ 1447 \ 1448 product(bool, ResizePLAB, true, \ 1449 "Dynamically resize (survivor space) promotion labs") \ 1450 \ 1451 product(bool, PrintPLAB, false, \ 1452 "Print (survivor space) promotion labs sizing decisions") \ 1453 \ 1454 product(intx, ParGCArrayScanChunk, 50, \ 1455 "Scan a subset and push remainder, if array is bigger than this") \ 1456 \ 1457 product(bool, ParGCUseLocalOverflow, false, \ 1458 "Instead of a global overflow list, use local overflow stacks") \ 1459 \ 1460 product(bool, ParGCTrimOverflow, true, \ 1461 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1462 \ 1463 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1464 "Whether we should simulate work queue overflow in ParNew") \ 1465 \ 1466 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1467 "An `interval' counter that determines how frequently " \ 1468 "we simulate overflow; a smaller number increases frequency") \ 1469 \ 1470 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1471 "The desired number of objects to claim from the overflow list") \ 1472 \ 1473 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1474 "The number of strides per worker thread that we divide up the " \ 1475 "card table scanning work into") \ 1476 \ 1477 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1478 "The number of cards in each chunk of the parallel chunks used " \ 1479 "during card table scanning") \ 1480 \ 1481 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1482 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1483 "parallel GC.") \ 1484 \ 1485 product(uintx, OldPLABWeight, 50, \ 1486 "Percentage (0-100) used to weight the current sample when" \ 1487 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 1488 \ 1489 product(bool, ResizeOldPLAB, true, \ 1490 "Dynamically resize (old gen) promotion labs") \ 1491 \ 1492 product(bool, PrintOldPLAB, false, \ 1493 "Print (old gen) promotion labs sizing decisions") \ 1494 \ 1495 product(uintx, CMSOldPLABMin, 16, \ 1496 "Min size of CMS gen promotion lab caches per worker per blksize")\ 1497 \ 1498 product(uintx, CMSOldPLABMax, 1024, \ 1499 "Max size of CMS gen promotion lab caches per worker per blksize")\ 1500 \ 1501 product(uintx, CMSOldPLABNumRefills, 4, \ 1502 "Nominal number of refills of CMS gen promotion lab cache" \ 1503 " per worker per block size") \ 1504 \ 1505 product(bool, CMSOldPLABResizeQuicker, false, \ 1506 "Whether to react on-the-fly during a scavenge to a sudden" \ 1507 " change in block demand rate") \ 1508 \ 1509 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1510 "The tolerance of the phase-change detector for on-the-fly" \ 1511 " PLAB resizing during a scavenge") \ 1512 \ 1513 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1514 "The gain in the feedback loop for on-the-fly PLAB resizing" \ 1515 " during a scavenge") \ 1516 \ 1517 product(bool, AlwaysPreTouch, false, \ 1518 "It forces all freshly committed pages to be pre-touched.") \ 1519 \ 1520 product_pd(uintx, CMSYoungGenPerWorker, \ 1521 "The maximum size of young gen chosen by default per GC worker " \ 1522 "thread available") \ 1523 \ 1524 product(bool, CMSIncrementalMode, false, \ 1525 "Whether CMS GC should operate in \"incremental\" mode") \ 1526 \ 1527 product(uintx, CMSIncrementalDutyCycle, 10, \ 1528 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1529 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1530 "value") \ 1531 \ 1532 product(bool, CMSIncrementalPacing, true, \ 1533 "Whether the CMS incremental mode duty cycle should be " \ 1534 "automatically adjusted") \ 1535 \ 1536 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1537 "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1538 "enabled (a percentage, 0-100)") \ 1539 \ 1540 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1541 "Percentage (0-100) used to add conservatism when computing the " \ 1542 "duty cycle") \ 1543 \ 1544 product(uintx, CMSIncrementalOffset, 0, \ 1545 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1546 " is shifted to the right within the period between young GCs") \ 1547 \ 1548 product(uintx, CMSExpAvgFactor, 50, \ 1549 "Percentage (0-100) used to weight the current sample when" \ 1550 "computing exponential averages for CMS statistics.") \ 1551 \ 1552 product(uintx, CMS_FLSWeight, 75, \ 1553 "Percentage (0-100) used to weight the current sample when" \ 1554 "computing exponentially decating averages for CMS FLS statistics.") \ 1555 \ 1556 product(uintx, CMS_FLSPadding, 1, \ 1557 "The multiple of deviation from mean to use for buffering" \ 1558 "against volatility in free list demand.") \ 1559 \ 1560 product(uintx, FLSCoalescePolicy, 2, \ 1561 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1562 \ 1563 product(bool, FLSAlwaysCoalesceLarge, false, \ 1564 "CMS: Larger free blocks are always available for coalescing") \ 1565 \ 1566 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1567 "CMS: the smaller the percentage the greater the coalition force")\ 1568 \ 1569 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1570 "CMS: the factor by which to inflate estimated demand of small" \ 1571 " block sizes to prevent coalescing with an adjoining block") \ 1572 \ 1573 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1574 "CMS: the factor by which to inflate estimated demand of large" \ 1575 " block sizes to prevent coalescing with an adjoining block") \ 1576 \ 1577 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1578 "CMS: the factor by which to inflate estimated demand of small" \ 1579 " block sizes to prevent splitting to supply demand for smaller" \ 1580 " blocks") \ 1581 \ 1582 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1583 "CMS: the factor by which to inflate estimated demand of large" \ 1584 " block sizes to prevent splitting to supply demand for smaller" \ 1585 " blocks") \ 1586 \ 1587 product(bool, CMSExtrapolateSweep, false, \ 1588 "CMS: cushion for block demand during sweep") \ 1589 \ 1590 product(uintx, CMS_SweepWeight, 75, \ 1591 "Percentage (0-100) used to weight the current sample when " \ 1592 "computing exponentially decaying average for inter-sweep " \ 1593 "duration") \ 1594 \ 1595 product(uintx, CMS_SweepPadding, 1, \ 1596 "The multiple of deviation from mean to use for buffering " \ 1597 "against volatility in inter-sweep duration.") \ 1598 \ 1599 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1600 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1601 "duration exceeds this threhold in milliseconds") \ 1602 \ 1603 develop(bool, CMSTraceIncrementalMode, false, \ 1604 "Trace CMS incremental mode") \ 1605 \ 1606 develop(bool, CMSTraceIncrementalPacing, false, \ 1607 "Trace CMS incremental mode pacing computation") \ 1608 \ 1609 develop(bool, CMSTraceThreadState, false, \ 1610 "Trace the CMS thread state (enable the trace_state() method)") \ 1611 \ 1612 product(bool, CMSClassUnloadingEnabled, true, \ 1613 "Whether class unloading enabled when using CMS GC") \ 1614 \ 1615 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1616 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1617 " for which classes may not be unloaded") \ 1618 \ 1619 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1620 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1621 \ 1622 product(bool, UseCMSCompactAtFullCollection, true, \ 1623 "Use mark sweep compact at full collections") \ 1624 \ 1625 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1626 "Number of CMS full collection done before compaction if > 0") \ 1627 \ 1628 develop(intx, CMSDictionaryChoice, 0, \ 1629 "Use BinaryTreeDictionary as default in the CMS generation") \ 1630 \ 1631 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1632 "Replenish an indexed free list with this number of chunks") \ 1633 \ 1634 product(bool, CMSReplenishIntermediate, true, \ 1635 "Replenish all intermediate free-list caches") \ 1636 \ 1637 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1638 "When satisfying batched demand, split blocks from the " \ 1639 "IndexedFreeList whose size is a multiple of requested size") \ 1640 \ 1641 product(bool, CMSLoopWarn, false, \ 1642 "Warn in case of excessive CMS looping") \ 1643 \ 1644 develop(bool, CMSOverflowEarlyRestoration, false, \ 1645 "Whether preserved marks should be restored early") \ 1646 \ 1647 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1648 "Size of marking stack") \ 1649 \ 1650 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1651 "Max size of marking stack") \ 1652 \ 1653 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1654 "Whether we should simulate frequent marking stack / work queue" \ 1655 " overflow") \ 1656 \ 1657 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1658 "An `interval' counter that determines how frequently" \ 1659 " we simulate overflow; a smaller number increases frequency") \ 1660 \ 1661 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1662 "(Temporary, subject to experimentation)" \ 1663 "Maximum number of abortable preclean iterations, if > 0") \ 1664 \ 1665 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1666 "(Temporary, subject to experimentation)" \ 1667 "Maximum time in abortable preclean in ms") \ 1668 \ 1669 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1670 "(Temporary, subject to experimentation)" \ 1671 "Nominal minimum work per abortable preclean iteration") \ 1672 \ 1673 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1674 "(Temporary, subject to experimentation)" \ 1675 " Time that we sleep between iterations when not given" \ 1676 " enough work per iteration") \ 1677 \ 1678 product(uintx, CMSRescanMultiple, 32, \ 1679 "Size (in cards) of CMS parallel rescan task") \ 1680 \ 1681 product(uintx, CMSConcMarkMultiple, 32, \ 1682 "Size (in cards) of CMS concurrent MT marking task") \ 1683 \ 1684 product(bool, CMSAbortSemantics, false, \ 1685 "Whether abort-on-overflow semantics is implemented") \ 1686 \ 1687 product(bool, CMSParallelRemarkEnabled, true, \ 1688 "Whether parallel remark enabled (only if ParNewGC)") \ 1689 \ 1690 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1691 "Whether parallel remark of survivor space" \ 1692 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1693 \ 1694 product(bool, CMSPLABRecordAlways, true, \ 1695 "Whether to always record survivor space PLAB bdries" \ 1696 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1697 \ 1698 product(bool, CMSConcurrentMTEnabled, true, \ 1699 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1700 \ 1701 product(bool, CMSPrecleaningEnabled, true, \ 1702 "Whether concurrent precleaning enabled") \ 1703 \ 1704 product(uintx, CMSPrecleanIter, 3, \ 1705 "Maximum number of precleaning iteration passes") \ 1706 \ 1707 product(uintx, CMSPrecleanNumerator, 2, \ 1708 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1709 " ratio") \ 1710 \ 1711 product(uintx, CMSPrecleanDenominator, 3, \ 1712 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1713 " ratio") \ 1714 \ 1715 product(bool, CMSPrecleanRefLists1, true, \ 1716 "Preclean ref lists during (initial) preclean phase") \ 1717 \ 1718 product(bool, CMSPrecleanRefLists2, false, \ 1719 "Preclean ref lists during abortable preclean phase") \ 1720 \ 1721 product(bool, CMSPrecleanSurvivors1, false, \ 1722 "Preclean survivors during (initial) preclean phase") \ 1723 \ 1724 product(bool, CMSPrecleanSurvivors2, true, \ 1725 "Preclean survivors during abortable preclean phase") \ 1726 \ 1727 product(uintx, CMSPrecleanThreshold, 1000, \ 1728 "Don't re-iterate if #dirty cards less than this") \ 1729 \ 1730 product(bool, CMSCleanOnEnter, true, \ 1731 "Clean-on-enter optimization for reducing number of dirty cards") \ 1732 \ 1733 product(uintx, CMSRemarkVerifyVariant, 1, \ 1734 "Choose variant (1,2) of verification following remark") \ 1735 \ 1736 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1737 "If Eden used is below this value, don't try to schedule remark") \ 1738 \ 1739 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1740 "The Eden occupancy % at which to try and schedule remark pause") \ 1741 \ 1742 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1743 "Start sampling Eden top at least before yg occupancy reaches" \ 1744 " 1/<ratio> of the size at which we plan to schedule remark") \ 1745 \ 1746 product(uintx, CMSSamplingGrain, 16*K, \ 1747 "The minimum distance between eden samples for CMS (see above)") \ 1748 \ 1749 product(bool, CMSScavengeBeforeRemark, false, \ 1750 "Attempt scavenge before the CMS remark step") \ 1751 \ 1752 develop(bool, CMSTraceSweeper, false, \ 1753 "Trace some actions of the CMS sweeper") \ 1754 \ 1755 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1756 "Don't drain below this size per parallel worker/thief") \ 1757 \ 1758 manageable(intx, CMSWaitDuration, 2000, \ 1759 "Time in milliseconds that CMS thread waits for young GC") \ 1760 \ 1761 develop(uintx, CMSCheckInterval, 1000, \ 1762 "Interval in milliseconds that CMS thread checks if it " \ 1763 "should start a collection cycle") \ 1764 \ 1765 product(bool, CMSYield, true, \ 1766 "Yield between steps of concurrent mark & sweep") \ 1767 \ 1768 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1769 "Bitmap operations should process at most this many bits" \ 1770 "between yields") \ 1771 \ 1772 product(bool, CMSDumpAtPromotionFailure, false, \ 1773 "Dump useful information about the state of the CMS old " \ 1774 " generation upon a promotion failure.") \ 1775 \ 1776 product(bool, CMSPrintChunksInDump, false, \ 1777 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1778 " more detailed information about the free chunks.") \ 1779 \ 1780 product(bool, CMSPrintObjectsInDump, false, \ 1781 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1782 " more detailed information about the allocated objects.") \ 1783 \ 1784 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1785 "Verify that all refs across the FLS boundary " \ 1786 " are to valid objects") \ 1787 \ 1788 diagnostic(bool, FLSVerifyLists, false, \ 1789 "Do lots of (expensive) FreeListSpace verification") \ 1790 \ 1791 diagnostic(bool, FLSVerifyIndexTable, false, \ 1792 "Do lots of (expensive) FLS index table verification") \ 1793 \ 1794 develop(bool, FLSVerifyDictionary, false, \ 1795 "Do lots of (expensive) FLS dictionary verification") \ 1796 \ 1797 develop(bool, VerifyBlockOffsetArray, false, \ 1798 "Do (expensive!) block offset array verification") \ 1799 \ 1800 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1801 "Maintain _unallocated_block in BlockOffsetArray" \ 1802 " (currently applicable only to CMS collector)") \ 1803 \ 1804 develop(bool, TraceCMSState, false, \ 1805 "Trace the state of the CMS collection") \ 1806 \ 1807 product(intx, RefDiscoveryPolicy, 0, \ 1808 "Whether reference-based(0) or referent-based(1)") \ 1809 \ 1810 product(bool, ParallelRefProcEnabled, false, \ 1811 "Enable parallel reference processing whenever possible") \ 1812 \ 1813 product(bool, ParallelRefProcBalancingEnabled, true, \ 1814 "Enable balancing of reference processing queues") \ 1815 \ 1816 product(uintx, CMSTriggerRatio, 80, \ 1817 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1818 "allocated before a CMS collection cycle commences") \ 1819 \ 1820 product(uintx, CMSBootstrapOccupancy, 50, \ 1821 "Percentage CMS generation occupancy at which to " \ 1822 "initiate CMS collection for bootstrapping collection stats") \ 1823 \ 1824 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1825 "Percentage CMS generation occupancy to start a CMS collection " \ 1826 "cycle. A negative value means that CMSTriggerRatio is used") \ 1827 \ 1828 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1829 "Percentage of the (entire) heap occupancy to start a " \ 1830 "concurrent GC cycle. It is used by GCs that trigger a " \ 1831 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1832 "not just one of the generations (e.g., G1). A value of 0 " \ 1833 "denotes 'do constant GC cycles'.") \ 1834 \ 1835 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1836 "Only use occupancy as a crierion for starting a CMS collection") \ 1837 \ 1838 product(uintx, CMSIsTooFullPercentage, 98, \ 1839 "An absolute ceiling above which CMS will always consider the " \ 1840 "unloading of classes when class unloading is enabled") \ 1841 \ 1842 develop(bool, CMSTestInFreeList, false, \ 1843 "Check if the coalesced range is already in the " \ 1844 "free lists as claimed") \ 1845 \ 1846 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1847 "Check that all the garbage collected was returned to the " \ 1848 "free lists.") \ 1849 \ 1850 notproduct(bool, ScavengeALot, false, \ 1851 "Force scavenge at every Nth exit from the runtime system " \ 1852 "(N=ScavengeALotInterval)") \ 1853 \ 1854 develop(bool, FullGCALot, false, \ 1855 "Force full gc at every Nth exit from the runtime system " \ 1856 "(N=FullGCALotInterval)") \ 1857 \ 1858 notproduct(bool, GCALotAtAllSafepoints, false, \ 1859 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1860 \ 1861 product(bool, PrintPromotionFailure, false, \ 1862 "Print additional diagnostic information following " \ 1863 " promotion failure") \ 1864 \ 1865 notproduct(bool, PromotionFailureALot, false, \ 1866 "Use promotion failure handling on every youngest generation " \ 1867 "collection") \ 1868 \ 1869 develop(uintx, PromotionFailureALotCount, 1000, \ 1870 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1871 "refill attempts (ParNew) or promotion attempts " \ 1872 "(other young collectors) ") \ 1873 \ 1874 develop(uintx, PromotionFailureALotInterval, 5, \ 1875 "Total collections between promotion failures alot") \ 1876 \ 1877 experimental(uintx, WorkStealingSleepMillis, 1, \ 1878 "Sleep time when sleep is used for yields") \ 1879 \ 1880 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1881 "Number of yields before a sleep is done during workstealing") \ 1882 \ 1883 experimental(uintx, WorkStealingHardSpins, 4096, \ 1884 "Number of iterations in a spin loop between checks on " \ 1885 "time out of hard spin") \ 1886 \ 1887 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1888 "Ratio of hard spins to calls to yield") \ 1889 \ 1890 develop(uintx, ObjArrayMarkingStride, 512, \ 1891 "Number of ObjArray elements to push onto the marking stack" \ 1892 "before pushing a continuation entry") \ 1893 \ 1894 develop(bool, MetadataAllocationFailALot, false, \ 1895 "Fail metadata allocations at intervals controlled by " \ 1896 "MetadataAllocationFailALotInterval") \ 1897 \ 1898 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1899 "metadata allocation failure alot interval") \ 1900 \ 1901 develop(bool, MetaDataDeallocateALot, false, \ 1902 "Deallocation bunches of metadata at intervals controlled by " \ 1903 "MetaDataAllocateALotInterval") \ 1904 \ 1905 develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1906 "Metadata deallocation alot interval") \ 1907 \ 1908 develop(bool, TraceMetadataChunkAllocation, false, \ 1909 "Trace chunk metadata allocations") \ 1910 \ 1911 product(bool, TraceMetadataHumongousAllocation, false, \ 1912 "Trace humongous metadata allocations") \ 1913 \ 1914 develop(bool, TraceMetavirtualspaceAllocation, false, \ 1915 "Trace virtual space metadata allocations") \ 1916 \ 1917 notproduct(bool, ExecuteInternalVMTests, false, \ 1918 "Enable execution of internal VM tests.") \ 1919 \ 1920 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1921 \ 1922 product_pd(bool, ResizeTLAB, \ 1923 "Dynamically resize tlab size for threads") \ 1924 \ 1925 product(bool, ZeroTLAB, false, \ 1926 "Zero out the newly created TLAB") \ 1927 \ 1928 product(bool, FastTLABRefill, true, \ 1929 "Use fast TLAB refill code") \ 1930 \ 1931 product(bool, PrintTLAB, false, \ 1932 "Print various TLAB related information") \ 1933 \ 1934 product(bool, TLABStats, true, \ 1935 "Print various TLAB related information") \ 1936 \ 1937 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1938 "Enable LowMemoryProtection")) \ 1939 \ 1940 product_pd(bool, NeverActAsServerClassMachine, \ 1941 "Never act like a server-class machine") \ 1942 \ 1943 product(bool, AlwaysActAsServerClassMachine, false, \ 1944 "Always act like a server-class machine") \ 1945 \ 1946 product_pd(uint64_t, MaxRAM, \ 1947 "Real memory size (in bytes) used to set maximum heap size") \ 1948 \ 1949 product(uintx, ErgoHeapSizeLimit, 0, \ 1950 "Maximum ergonomically set heap size (in bytes); zero means use " \ 1951 "MaxRAM / MaxRAMFraction") \ 1952 \ 1953 product(uintx, MaxRAMFraction, 4, \ 1954 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1955 "size") \ 1956 \ 1957 product(uintx, DefaultMaxRAMFraction, 4, \ 1958 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1959 "size; deprecated: to be renamed to MaxRAMFraction") \ 1960 \ 1961 product(uintx, MinRAMFraction, 2, \ 1962 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 1963 "size on systems with small physical memory size") \ 1964 \ 1965 product(uintx, InitialRAMFraction, 64, \ 1966 "Fraction (1/n) of real memory used for initial heap size") \ 1967 \ 1968 develop(uintx, MaxVirtMemFraction, 2, \ 1969 "Maximum fraction (1/n) of virtual memory used for ergonomically" \ 1970 "determining maximum heap size") \ 1971 \ 1972 product(bool, UseAutoGCSelectPolicy, false, \ 1973 "Use automatic collection selection policy") \ 1974 \ 1975 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1976 "Automatic GC selection pause threshhold in ms") \ 1977 \ 1978 product(bool, UseAdaptiveSizePolicy, true, \ 1979 "Use adaptive generation sizing policies") \ 1980 \ 1981 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1982 "Use adaptive survivor sizing policies") \ 1983 \ 1984 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1985 "Use adaptive young-old sizing policies at minor collections") \ 1986 \ 1987 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1988 "Use adaptive young-old sizing policies at major collections") \ 1989 \ 1990 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1991 "Use statistics from System.GC for adaptive size policy") \ 1992 \ 1993 product(bool, UseAdaptiveGCBoundary, false, \ 1994 "Allow young-old boundary to move") \ 1995 \ 1996 develop(bool, TraceAdaptiveGCBoundary, false, \ 1997 "Trace young-old boundary moves") \ 1998 \ 1999 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2000 "Resize the virtual spaces of the young or old generations") \ 2001 \ 2002 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2003 "Policy for changeing generation size for throughput goals") \ 2004 \ 2005 product(uintx, AdaptiveSizePausePolicy, 0, \ 2006 "Policy for changing generation size for pause goals") \ 2007 \ 2008 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2009 "Adjust tenured generation to achive a minor pause goal") \ 2010 \ 2011 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2012 "Adjust young generation to achive a major pause goal") \ 2013 \ 2014 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2015 "Number of steps where heuristics is used before data is used") \ 2016 \ 2017 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2018 "Number of collections before the adaptive sizing is started") \ 2019 \ 2020 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2021 "Collection interval for printing information; zero means never") \ 2022 \ 2023 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2024 "Use adaptive minimum footprint as a goal") \ 2025 \ 2026 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2027 "Weight given to exponential resizing, between 0 and 100") \ 2028 \ 2029 product(uintx, AdaptiveTimeWeight, 25, \ 2030 "Weight given to time in adaptive policy, between 0 and 100") \ 2031 \ 2032 product(uintx, PausePadding, 1, \ 2033 "How much buffer to keep for pause time") \ 2034 \ 2035 product(uintx, PromotedPadding, 3, \ 2036 "How much buffer to keep for promotion failure") \ 2037 \ 2038 product(uintx, SurvivorPadding, 3, \ 2039 "How much buffer to keep for survivor overflow") \ 2040 \ 2041 product(uintx, ThresholdTolerance, 10, \ 2042 "Allowed collection cost difference between generations") \ 2043 \ 2044 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2045 "If collection costs are within margin, reduce both by full " \ 2046 "delta") \ 2047 \ 2048 product(uintx, YoungGenerationSizeIncrement, 20, \ 2049 "Adaptive size percentage change in young generation") \ 2050 \ 2051 product(uintx, YoungGenerationSizeSupplement, 80, \ 2052 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2053 \ 2054 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2055 "Decay factor to YoungedGenerationSizeSupplement") \ 2056 \ 2057 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2058 "Adaptive size percentage change in tenured generation") \ 2059 \ 2060 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2061 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2062 \ 2063 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2064 "Decay factor to TenuredGenerationSizeIncrement") \ 2065 \ 2066 product(uintx, MaxGCPauseMillis, max_uintx, \ 2067 "Adaptive size policy maximum GC pause time goal in msec, " \ 2068 "or (G1 Only) the max. GC time per MMU time slice") \ 2069 \ 2070 product(uintx, GCPauseIntervalMillis, 0, \ 2071 "Time slice for MMU specification") \ 2072 \ 2073 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2074 "Adaptive size policy maximum GC minor pause time goal in msec") \ 2075 \ 2076 product(uintx, GCTimeRatio, 99, \ 2077 "Adaptive size policy application time to GC time ratio") \ 2078 \ 2079 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2080 "Adaptive size scale down factor for shrinking") \ 2081 \ 2082 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2083 "Adaptive size decays the major cost for long major intervals") \ 2084 \ 2085 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2086 "Time scale over which major costs decay") \ 2087 \ 2088 product(uintx, MinSurvivorRatio, 3, \ 2089 "Minimum ratio of young generation/survivor space size") \ 2090 \ 2091 product(uintx, InitialSurvivorRatio, 8, \ 2092 "Initial ratio of eden/survivor space size") \ 2093 \ 2094 product(uintx, BaseFootPrintEstimate, 256*M, \ 2095 "Estimate of footprint other than Java Heap") \ 2096 \ 2097 product(bool, UseGCOverheadLimit, true, \ 2098 "Use policy to limit of proportion of time spent in GC " \ 2099 "before an OutOfMemory error is thrown") \ 2100 \ 2101 product(uintx, GCTimeLimit, 98, \ 2102 "Limit of proportion of time spent in GC before an OutOfMemory" \ 2103 "error is thrown (used with GCHeapFreeLimit)") \ 2104 \ 2105 product(uintx, GCHeapFreeLimit, 2, \ 2106 "Minimum percentage of free space after a full GC before an " \ 2107 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2108 \ 2109 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2110 "Number of consecutive collections before gc time limit fires") \ 2111 \ 2112 product(bool, PrintAdaptiveSizePolicy, false, \ 2113 "Print information about AdaptiveSizePolicy") \ 2114 \ 2115 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2116 "How far ahead to prefetch destination area (<= 0 means off)") \ 2117 \ 2118 product(intx, PrefetchScanIntervalInBytes, -1, \ 2119 "How far ahead to prefetch scan area (<= 0 means off)") \ 2120 \ 2121 product(intx, PrefetchFieldsAhead, -1, \ 2122 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2123 \ 2124 diagnostic(bool, VerifySilently, false, \ 2125 "Don't print print the verification progress") \ 2126 \ 2127 diagnostic(bool, VerifyDuringStartup, false, \ 2128 "Verify memory system before executing any Java code " \ 2129 "during VM initialization") \ 2130 \ 2131 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2132 "Verify system before exiting") \ 2133 \ 2134 diagnostic(bool, VerifyBeforeGC, false, \ 2135 "Verify memory system before GC") \ 2136 \ 2137 diagnostic(bool, VerifyAfterGC, false, \ 2138 "Verify memory system after GC") \ 2139 \ 2140 diagnostic(bool, VerifyDuringGC, false, \ 2141 "Verify memory system during GC (between phases)") \ 2142 \ 2143 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2144 "Enable parallel memory system verification") \ 2145 \ 2146 diagnostic(bool, DeferInitialCardMark, false, \ 2147 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2148 "may arise from new_pre_store_barrier") \ 2149 \ 2150 diagnostic(bool, VerifyRememberedSets, false, \ 2151 "Verify GC remembered sets") \ 2152 \ 2153 diagnostic(bool, VerifyObjectStartArray, true, \ 2154 "Verify GC object start array if verify before/after") \ 2155 \ 2156 product(bool, DisableExplicitGC, false, \ 2157 "Tells whether calling System.gc() does a full GC") \ 2158 \ 2159 notproduct(bool, CheckMemoryInitialization, false, \ 2160 "Checks memory initialization") \ 2161 \ 2162 product(bool, CollectGen0First, false, \ 2163 "Collect youngest generation before each full GC") \ 2164 \ 2165 diagnostic(bool, BindCMSThreadToCPU, false, \ 2166 "Bind CMS Thread to CPU if possible") \ 2167 \ 2168 diagnostic(uintx, CPUForCMSThread, 0, \ 2169 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2170 \ 2171 product(bool, BindGCTaskThreadsToCPUs, false, \ 2172 "Bind GCTaskThreads to CPUs if possible") \ 2173 \ 2174 product(bool, UseGCTaskAffinity, false, \ 2175 "Use worker affinity when asking for GCTasks") \ 2176 \ 2177 product(uintx, ProcessDistributionStride, 4, \ 2178 "Stride through processors when distributing processes") \ 2179 \ 2180 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2181 "number of times the coordinator GC thread will sleep while " \ 2182 "yielding before giving up and resuming GC") \ 2183 \ 2184 product(uintx, CMSYieldSleepCount, 0, \ 2185 "number of times a GC thread (minus the coordinator) " \ 2186 "will sleep while yielding before giving up and resuming GC") \ 2187 \ 2188 /* gc tracing */ \ 2189 manageable(bool, PrintGC, false, \ 2190 "Print message at garbage collect") \ 2191 \ 2192 manageable(bool, PrintGCDetails, false, \ 2193 "Print more details at garbage collect") \ 2194 \ 2195 manageable(bool, PrintGCDateStamps, false, \ 2196 "Print date stamps at garbage collect") \ 2197 \ 2198 manageable(bool, PrintGCTimeStamps, false, \ 2199 "Print timestamps at garbage collect") \ 2200 \ 2201 product(bool, PrintGCTaskTimeStamps, false, \ 2202 "Print timestamps for individual gc worker thread tasks") \ 2203 \ 2204 develop(intx, ConcGCYieldTimeout, 0, \ 2205 "If non-zero, assert that GC threads yield within this # of ms.") \ 2206 \ 2207 notproduct(bool, TraceMarkSweep, false, \ 2208 "Trace mark sweep") \ 2209 \ 2210 product(bool, PrintReferenceGC, false, \ 2211 "Print times spent handling reference objects during GC " \ 2212 " (enabled only when PrintGCDetails)") \ 2213 \ 2214 develop(bool, TraceReferenceGC, false, \ 2215 "Trace handling of soft/weak/final/phantom references") \ 2216 \ 2217 develop(bool, TraceFinalizerRegistration, false, \ 2218 "Trace registration of final references") \ 2219 \ 2220 notproduct(bool, TraceScavenge, false, \ 2221 "Trace scavenge") \ 2222 \ 2223 product_rw(bool, TraceClassLoading, false, \ 2224 "Trace all classes loaded") \ 2225 \ 2226 product(bool, TraceClassLoadingPreorder, false, \ 2227 "Trace all classes loaded in order referenced (not loaded)") \ 2228 \ 2229 product_rw(bool, TraceClassUnloading, false, \ 2230 "Trace unloading of classes") \ 2231 \ 2232 product_rw(bool, TraceLoaderConstraints, false, \ 2233 "Trace loader constraints") \ 2234 \ 2235 develop(bool, TraceClassLoaderData, false, \ 2236 "Trace class loader loader_data lifetime") \ 2237 \ 2238 product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2239 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2240 "Initial size of the boot class loader data metaspace") \ 2241 \ 2242 product(bool, TraceGen0Time, false, \ 2243 "Trace accumulated time for Gen 0 collection") \ 2244 \ 2245 product(bool, TraceGen1Time, false, \ 2246 "Trace accumulated time for Gen 1 collection") \ 2247 \ 2248 product(bool, PrintTenuringDistribution, false, \ 2249 "Print tenuring age information") \ 2250 \ 2251 product_rw(bool, PrintHeapAtGC, false, \ 2252 "Print heap layout before and after each GC") \ 2253 \ 2254 product_rw(bool, PrintHeapAtGCExtended, false, \ 2255 "Prints extended information about the layout of the heap " \ 2256 "when -XX:+PrintHeapAtGC is set") \ 2257 \ 2258 product(bool, PrintHeapAtSIGBREAK, true, \ 2259 "Print heap layout in response to SIGBREAK") \ 2260 \ 2261 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2262 "Print a class histogram before any major stop-world GC") \ 2263 \ 2264 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2265 "Print a class histogram after any major stop-world GC") \ 2266 \ 2267 manageable(bool, PrintClassHistogram, false, \ 2268 "Print a histogram of class instances") \ 2269 \ 2270 develop(bool, TraceWorkGang, false, \ 2271 "Trace activities of work gangs") \ 2272 \ 2273 product(bool, TraceParallelOldGCTasks, false, \ 2274 "Trace multithreaded GC activity") \ 2275 \ 2276 develop(bool, TraceBlockOffsetTable, false, \ 2277 "Print BlockOffsetTable maps") \ 2278 \ 2279 develop(bool, TraceCardTableModRefBS, false, \ 2280 "Print CardTableModRefBS maps") \ 2281 \ 2282 develop(bool, TraceGCTaskManager, false, \ 2283 "Trace actions of the GC task manager") \ 2284 \ 2285 develop(bool, TraceGCTaskQueue, false, \ 2286 "Trace actions of the GC task queues") \ 2287 \ 2288 diagnostic(bool, TraceGCTaskThread, false, \ 2289 "Trace actions of the GC task threads") \ 2290 \ 2291 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2292 "Print the time taken by each parallel old gc phase." \ 2293 "PrintGCDetails must also be enabled.") \ 2294 \ 2295 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2296 "Trace parallel old gc marking phase") \ 2297 \ 2298 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2299 "Trace parallel old gc summary phase") \ 2300 \ 2301 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2302 "Trace parallel old gc compaction phase") \ 2303 \ 2304 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2305 "Trace parallel old gc dense prefix computation") \ 2306 \ 2307 develop(bool, IgnoreLibthreadGPFault, false, \ 2308 "Suppress workaround for libthread GP fault") \ 2309 \ 2310 product(bool, PrintJNIGCStalls, false, \ 2311 "Print diagnostic message when GC is stalled" \ 2312 "by JNI critical section") \ 2313 \ 2314 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2315 "The percentage of the used heap that the instances of a class " \ 2316 "must occupy for the class to generate a trace event.") \ 2317 \ 2318 /* GC log rotation setting */ \ 2319 \ 2320 product(bool, UseGCLogFileRotation, false, \ 2321 "Prevent large gclog file for long running app. " \ 2322 "Requires -Xloggc:<filename>") \ 2323 \ 2324 product(uintx, NumberOfGCLogFiles, 0, \ 2325 "Number of gclog files in rotation, " \ 2326 "Default: 0, no rotation") \ 2327 \ 2328 product(uintx, GCLogFileSize, 0, \ 2329 "GC log file size, Default: 0 bytes, no rotation " \ 2330 "Only valid with UseGCLogFileRotation") \ 2331 \ 2332 /* JVMTI heap profiling */ \ 2333 \ 2334 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2335 "Trace JVMTI object tagging calls") \ 2336 \ 2337 diagnostic(bool, VerifyBeforeIteration, false, \ 2338 "Verify memory system before JVMTI iteration") \ 2339 \ 2340 /* compiler interface */ \ 2341 \ 2342 develop(bool, CIPrintCompilerName, false, \ 2343 "when CIPrint is active, print the name of the active compiler") \ 2344 \ 2345 develop(bool, CIPrintCompileQueue, false, \ 2346 "display the contents of the compile queue whenever a " \ 2347 "compilation is enqueued") \ 2348 \ 2349 develop(bool, CIPrintRequests, false, \ 2350 "display every request for compilation") \ 2351 \ 2352 product(bool, CITime, false, \ 2353 "collect timing information for compilation") \ 2354 \ 2355 develop(bool, CITimeEach, false, \ 2356 "display timing information after each successful compilation") \ 2357 \ 2358 develop(bool, CICountOSR, false, \ 2359 "use a separate counter when assigning ids to osr compilations") \ 2360 \ 2361 develop(bool, CICompileNatives, true, \ 2362 "compile native methods if supported by the compiler") \ 2363 \ 2364 develop_pd(bool, CICompileOSR, \ 2365 "compile on stack replacement methods if supported by the " \ 2366 "compiler") \ 2367 \ 2368 develop(bool, CIPrintMethodCodes, false, \ 2369 "print method bytecodes of the compiled code") \ 2370 \ 2371 develop(bool, CIPrintTypeFlow, false, \ 2372 "print the results of ciTypeFlow analysis") \ 2373 \ 2374 develop(bool, CITraceTypeFlow, false, \ 2375 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2376 \ 2377 develop(intx, OSROnlyBCI, -1, \ 2378 "OSR only at this bci. Negative values mean exclude that bci") \ 2379 \ 2380 /* compiler */ \ 2381 \ 2382 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2383 "Number of compiler threads to run") \ 2384 \ 2385 product(intx, CompilationPolicyChoice, 0, \ 2386 "which compilation policy (0/1)") \ 2387 \ 2388 develop(bool, UseStackBanging, true, \ 2389 "use stack banging for stack overflow checks (required for " \ 2390 "proper StackOverflow handling; disable only to measure cost " \ 2391 "of stackbanging)") \ 2392 \ 2393 develop(bool, UseStrictFP, true, \ 2394 "use strict fp if modifier strictfp is set") \ 2395 \ 2396 develop(bool, GenerateSynchronizationCode, true, \ 2397 "generate locking/unlocking code for synchronized methods and " \ 2398 "monitors") \ 2399 \ 2400 develop(bool, GenerateCompilerNullChecks, true, \ 2401 "Generate explicit null checks for loads/stores/calls") \ 2402 \ 2403 develop(bool, GenerateRangeChecks, true, \ 2404 "Generate range checks for array accesses") \ 2405 \ 2406 develop_pd(bool, ImplicitNullChecks, \ 2407 "generate code for implicit null checks") \ 2408 \ 2409 product(bool, PrintSafepointStatistics, false, \ 2410 "print statistics about safepoint synchronization") \ 2411 \ 2412 product(intx, PrintSafepointStatisticsCount, 300, \ 2413 "total number of safepoint statistics collected " \ 2414 "before printing them out") \ 2415 \ 2416 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2417 "print safepoint statistics only when safepoint takes" \ 2418 " more than PrintSafepointSatisticsTimeout in millis") \ 2419 \ 2420 product(bool, TraceSafepointCleanupTime, false, \ 2421 "print the break down of clean up tasks performed during" \ 2422 " safepoint") \ 2423 \ 2424 product(bool, Inline, true, \ 2425 "enable inlining") \ 2426 \ 2427 product(bool, ClipInlining, true, \ 2428 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2429 \ 2430 develop(bool, UseCHA, true, \ 2431 "enable CHA") \ 2432 \ 2433 product(bool, UseTypeProfile, true, \ 2434 "Check interpreter profile for historically monomorphic calls") \ 2435 \ 2436 notproduct(bool, TimeCompiler, false, \ 2437 "time the compiler") \ 2438 \ 2439 diagnostic(bool, PrintInlining, false, \ 2440 "prints inlining optimizations") \ 2441 \ 2442 product(bool, UsePopCountInstruction, false, \ 2443 "Use population count instruction") \ 2444 \ 2445 develop(bool, EagerInitialization, false, \ 2446 "Eagerly initialize classes if possible") \ 2447 \ 2448 develop(bool, TraceMethodReplacement, false, \ 2449 "Print when methods are replaced do to recompilation") \ 2450 \ 2451 develop(bool, PrintMethodFlushing, false, \ 2452 "print the nmethods being flushed") \ 2453 \ 2454 develop(bool, UseRelocIndex, false, \ 2455 "use an index to speed random access to relocations") \ 2456 \ 2457 develop(bool, StressCodeBuffers, false, \ 2458 "Exercise code buffer expansion and other rare state changes") \ 2459 \ 2460 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2461 "Generate extra debugging info for non-safepoints in nmethods") \ 2462 \ 2463 product(bool, PrintVMOptions, false, \ 2464 "Print flags that appeared on the command line") \ 2465 \ 2466 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2467 "Ignore unrecognized VM options") \ 2468 \ 2469 product(bool, PrintCommandLineFlags, false, \ 2470 "Print flags specified on command line or set by ergonomics") \ 2471 \ 2472 product(bool, PrintFlagsInitial, false, \ 2473 "Print all VM flags before argument processing and exit VM") \ 2474 \ 2475 product(bool, PrintFlagsFinal, false, \ 2476 "Print all VM flags after argument and ergonomic processing") \ 2477 \ 2478 notproduct(bool, PrintFlagsWithComments, false, \ 2479 "Print all VM flags with default values and descriptions and exit")\ 2480 \ 2481 diagnostic(bool, SerializeVMOutput, true, \ 2482 "Use a mutex to serialize output to tty and hotspot.log") \ 2483 \ 2484 diagnostic(bool, DisplayVMOutput, true, \ 2485 "Display all VM output on the tty, independently of LogVMOutput") \ 2486 \ 2487 diagnostic(bool, LogVMOutput, trueInDebug, \ 2488 "Save VM output to hotspot.log, or to LogFile") \ 2489 \ 2490 diagnostic(ccstr, LogFile, NULL, \ 2491 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2492 \ 2493 product(ccstr, ErrorFile, NULL, \ 2494 "If an error occurs, save the error data to this file " \ 2495 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2496 \ 2497 product(bool, DisplayVMOutputToStderr, false, \ 2498 "If DisplayVMOutput is true, display all VM output to stderr") \ 2499 \ 2500 product(bool, DisplayVMOutputToStdout, false, \ 2501 "If DisplayVMOutput is true, display all VM output to stdout") \ 2502 \ 2503 product(bool, UseHeavyMonitors, false, \ 2504 "use heavyweight instead of lightweight Java monitors") \ 2505 \ 2506 product(bool, PrintStringTableStatistics, false, \ 2507 "print statistics about the StringTable and SymbolTable") \ 2508 \ 2509 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2510 "print histogram of the symbol table") \ 2511 \ 2512 notproduct(bool, ExitVMOnVerifyError, false, \ 2513 "standard exit from VM if bytecode verify error " \ 2514 "(only in debug mode)") \ 2515 \ 2516 notproduct(ccstr, AbortVMOnException, NULL, \ 2517 "Call fatal if this exception is thrown. Example: " \ 2518 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2519 \ 2520 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2521 "Call fatal if the exception pointed by AbortVMOnException " \ 2522 "has this message.") \ 2523 \ 2524 develop(bool, DebugVtables, false, \ 2525 "add debugging code to vtable dispatch") \ 2526 \ 2527 develop(bool, PrintVtables, false, \ 2528 "print vtables when printing klass") \ 2529 \ 2530 notproduct(bool, PrintVtableStats, false, \ 2531 "print vtables stats at end of run") \ 2532 \ 2533 develop(bool, TraceCreateZombies, false, \ 2534 "trace creation of zombie nmethods") \ 2535 \ 2536 notproduct(bool, IgnoreLockingAssertions, false, \ 2537 "disable locking assertions (for speed)") \ 2538 \ 2539 product(bool, RangeCheckElimination, true, \ 2540 "Eliminate range checks") \ 2541 \ 2542 develop_pd(bool, UncommonNullCast, \ 2543 "track occurrences of null in casts; adjust compiler tactics") \ 2544 \ 2545 develop(bool, TypeProfileCasts, true, \ 2546 "treat casts like calls for purposes of type profiling") \ 2547 \ 2548 develop(bool, DelayCompilationDuringStartup, true, \ 2549 "Delay invoking the compiler until main application class is " \ 2550 "loaded") \ 2551 \ 2552 develop(bool, CompileTheWorld, false, \ 2553 "Compile all methods in all classes in bootstrap class path " \ 2554 "(stress test)") \ 2555 \ 2556 develop(bool, CompileTheWorldPreloadClasses, true, \ 2557 "Preload all classes used by a class before start loading") \ 2558 \ 2559 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2560 "Force a safepoint every n compiles so sweeper can keep up") \ 2561 \ 2562 develop(bool, FillDelaySlots, true, \ 2563 "Fill delay slots (on SPARC only)") \ 2564 \ 2565 develop(bool, TimeLivenessAnalysis, false, \ 2566 "Time computation of bytecode liveness analysis") \ 2567 \ 2568 develop(bool, TraceLivenessGen, false, \ 2569 "Trace the generation of liveness analysis information") \ 2570 \ 2571 notproduct(bool, TraceLivenessQuery, false, \ 2572 "Trace queries of liveness analysis information") \ 2573 \ 2574 notproduct(bool, CollectIndexSetStatistics, false, \ 2575 "Collect information about IndexSets") \ 2576 \ 2577 develop(bool, UseLoopSafepoints, true, \ 2578 "Generate Safepoint nodes in every loop") \ 2579 \ 2580 develop(intx, FastAllocateSizeLimit, 128*K, \ 2581 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2582 "Inline allocations larger than this in doublewords must go slow")\ 2583 \ 2584 product(bool, AggressiveOpts, false, \ 2585 "Enable aggressive optimizations - see arguments.cpp") \ 2586 \ 2587 product(bool, UseStringCache, false, \ 2588 "Enable String cache capabilities on String.java") \ 2589 \ 2590 /* statistics */ \ 2591 develop(bool, CountCompiledCalls, false, \ 2592 "counts method invocations") \ 2593 \ 2594 notproduct(bool, CountRuntimeCalls, false, \ 2595 "counts VM runtime calls") \ 2596 \ 2597 develop(bool, CountJNICalls, false, \ 2598 "counts jni method invocations") \ 2599 \ 2600 notproduct(bool, CountJVMCalls, false, \ 2601 "counts jvm method invocations") \ 2602 \ 2603 notproduct(bool, CountRemovableExceptions, false, \ 2604 "count exceptions that could be replaced by branches due to " \ 2605 "inlining") \ 2606 \ 2607 notproduct(bool, ICMissHistogram, false, \ 2608 "produce histogram of IC misses") \ 2609 \ 2610 notproduct(bool, PrintClassStatistics, false, \ 2611 "prints class statistics at end of run") \ 2612 \ 2613 notproduct(bool, PrintMethodStatistics, false, \ 2614 "prints method statistics at end of run") \ 2615 \ 2616 /* interpreter */ \ 2617 develop(bool, ClearInterpreterLocals, false, \ 2618 "Always clear local variables of interpreter activations upon " \ 2619 "entry") \ 2620 \ 2621 product_pd(bool, RewriteBytecodes, \ 2622 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2623 \ 2624 product_pd(bool, RewriteFrequentPairs, \ 2625 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2626 \ 2627 diagnostic(bool, PrintInterpreter, false, \ 2628 "Prints the generated interpreter code") \ 2629 \ 2630 product(bool, UseInterpreter, true, \ 2631 "Use interpreter for non-compiled methods") \ 2632 \ 2633 develop(bool, UseFastSignatureHandlers, true, \ 2634 "Use fast signature handlers for native calls") \ 2635 \ 2636 product(bool, UseLoopCounter, true, \ 2637 "Increment invocation counter on backward branch") \ 2638 \ 2639 product(bool, UseFastEmptyMethods, true, \ 2640 "Use fast method entry code for empty methods") \ 2641 \ 2642 product(bool, UseFastAccessorMethods, true, \ 2643 "Use fast method entry code for accessor methods") \ 2644 \ 2645 product_pd(bool, UseOnStackReplacement, \ 2646 "Use on stack replacement, calls runtime if invoc. counter " \ 2647 "overflows in loop") \ 2648 \ 2649 notproduct(bool, TraceOnStackReplacement, false, \ 2650 "Trace on stack replacement") \ 2651 \ 2652 product_pd(bool, PreferInterpreterNativeStubs, \ 2653 "Use always interpreter stubs for native methods invoked via " \ 2654 "interpreter") \ 2655 \ 2656 develop(bool, CountBytecodes, false, \ 2657 "Count number of bytecodes executed") \ 2658 \ 2659 develop(bool, PrintBytecodeHistogram, false, \ 2660 "Print histogram of the executed bytecodes") \ 2661 \ 2662 develop(bool, PrintBytecodePairHistogram, false, \ 2663 "Print histogram of the executed bytecode pairs") \ 2664 \ 2665 diagnostic(bool, PrintSignatureHandlers, false, \ 2666 "Print code generated for native method signature handlers") \ 2667 \ 2668 develop(bool, VerifyOops, false, \ 2669 "Do plausibility checks for oops") \ 2670 \ 2671 develop(bool, CheckUnhandledOops, false, \ 2672 "Check for unhandled oops in VM code") \ 2673 \ 2674 develop(bool, VerifyJNIFields, trueInDebug, \ 2675 "Verify jfieldIDs for instance fields") \ 2676 \ 2677 notproduct(bool, VerifyJNIEnvThread, false, \ 2678 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2679 "from JNI") \ 2680 \ 2681 develop(bool, VerifyFPU, false, \ 2682 "Verify FPU state (check for NaN's, etc.)") \ 2683 \ 2684 develop(bool, VerifyThread, false, \ 2685 "Watch the thread register for corruption (SPARC only)") \ 2686 \ 2687 develop(bool, VerifyActivationFrameSize, false, \ 2688 "Verify that activation frame didn't become smaller than its " \ 2689 "minimal size") \ 2690 \ 2691 develop(bool, TraceFrequencyInlining, false, \ 2692 "Trace frequency based inlining") \ 2693 \ 2694 develop_pd(bool, InlineIntrinsics, \ 2695 "Inline intrinsics that can be statically resolved") \ 2696 \ 2697 product_pd(bool, ProfileInterpreter, \ 2698 "Profile at the bytecode level during interpretation") \ 2699 \ 2700 develop_pd(bool, ProfileTraps, \ 2701 "Profile deoptimization traps at the bytecode level") \ 2702 \ 2703 product(intx, ProfileMaturityPercentage, 20, \ 2704 "number of method invocations/branches (expressed as % of " \ 2705 "CompileThreshold) before using the method's profile") \ 2706 \ 2707 develop(bool, PrintMethodData, false, \ 2708 "Print the results of +ProfileInterpreter at end of run") \ 2709 \ 2710 develop(bool, VerifyDataPointer, trueInDebug, \ 2711 "Verify the method data pointer during interpreter profiling") \ 2712 \ 2713 develop(bool, VerifyCompiledCode, false, \ 2714 "Include miscellaneous runtime verifications in nmethod code; " \ 2715 "default off because it disturbs nmethod size heuristics") \ 2716 \ 2717 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2718 "Manually make GC thread crash then dump java stack trace; " \ 2719 "Test only") \ 2720 \ 2721 /* compilation */ \ 2722 product(bool, UseCompiler, true, \ 2723 "use compilation") \ 2724 \ 2725 develop(bool, TraceCompilationPolicy, false, \ 2726 "Trace compilation policy") \ 2727 \ 2728 develop(bool, TimeCompilationPolicy, false, \ 2729 "Time the compilation policy") \ 2730 \ 2731 product(bool, UseCounterDecay, true, \ 2732 "adjust recompilation counters") \ 2733 \ 2734 develop(intx, CounterHalfLifeTime, 30, \ 2735 "half-life time of invocation counters (in secs)") \ 2736 \ 2737 develop(intx, CounterDecayMinIntervalLength, 500, \ 2738 "Min. ms. between invocation of CounterDecay") \ 2739 \ 2740 product(bool, AlwaysCompileLoopMethods, false, \ 2741 "when using recompilation, never interpret methods " \ 2742 "containing loops") \ 2743 \ 2744 product(bool, DontCompileHugeMethods, true, \ 2745 "don't compile methods > HugeMethodLimit") \ 2746 \ 2747 /* Bytecode escape analysis estimation. */ \ 2748 product(bool, EstimateArgEscape, true, \ 2749 "Analyze bytecodes to estimate escape state of arguments") \ 2750 \ 2751 product(intx, BCEATraceLevel, 0, \ 2752 "How much tracing to do of bytecode escape analysis estimates") \ 2753 \ 2754 product(intx, MaxBCEAEstimateLevel, 5, \ 2755 "Maximum number of nested calls that are analyzed by BC EA.") \ 2756 \ 2757 product(intx, MaxBCEAEstimateSize, 150, \ 2758 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2759 \ 2760 product(intx, AllocatePrefetchStyle, 1, \ 2761 "0 = no prefetch, " \ 2762 "1 = prefetch instructions for each allocation, " \ 2763 "2 = use TLAB watermark to gate allocation prefetch, " \ 2764 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2765 \ 2766 product(intx, AllocatePrefetchDistance, -1, \ 2767 "Distance to prefetch ahead of allocation pointer") \ 2768 \ 2769 product(intx, AllocatePrefetchLines, 3, \ 2770 "Number of lines to prefetch ahead of array allocation pointer") \ 2771 \ 2772 product(intx, AllocateInstancePrefetchLines, 1, \ 2773 "Number of lines to prefetch ahead of instance allocation pointer") \ 2774 \ 2775 product(intx, AllocatePrefetchStepSize, 16, \ 2776 "Step size in bytes of sequential prefetch instructions") \ 2777 \ 2778 product(intx, AllocatePrefetchInstr, 0, \ 2779 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2780 \ 2781 /* deoptimization */ \ 2782 develop(bool, TraceDeoptimization, false, \ 2783 "Trace deoptimization") \ 2784 \ 2785 develop(bool, DebugDeoptimization, false, \ 2786 "Tracing various information while debugging deoptimization") \ 2787 \ 2788 product(intx, SelfDestructTimer, 0, \ 2789 "Will cause VM to terminate after a given time (in minutes) " \ 2790 "(0 means off)") \ 2791 \ 2792 product(intx, MaxJavaStackTraceDepth, 1024, \ 2793 "Max. no. of lines in the stack trace for Java exceptions " \ 2794 "(0 means all)") \ 2795 \ 2796 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2797 "Guarantee a safepoint (at least) every so many milliseconds " \ 2798 "(0 means none)")) \ 2799 \ 2800 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2801 "Guarantee a safepoint (at least) every so many milliseconds " \ 2802 "(0 means none)")) \ 2803 \ 2804 product(intx, SafepointTimeoutDelay, 10000, \ 2805 "Delay in milliseconds for option SafepointTimeout") \ 2806 \ 2807 product(intx, NmethodSweepFraction, 16, \ 2808 "Number of invocations of sweeper to cover all nmethods") \ 2809 \ 2810 product(intx, NmethodSweepCheckInterval, 5, \ 2811 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2812 \ 2813 notproduct(bool, LogSweeper, false, \ 2814 "Keep a ring buffer of sweeper activity") \ 2815 \ 2816 notproduct(intx, SweeperLogEntries, 1024, \ 2817 "Number of records in the ring buffer of sweeper activity") \ 2818 \ 2819 notproduct(intx, MemProfilingInterval, 500, \ 2820 "Time between each invocation of the MemProfiler") \ 2821 \ 2822 develop(intx, MallocCatchPtr, -1, \ 2823 "Hit breakpoint when mallocing/freeing this pointer") \ 2824 \ 2825 notproduct(intx, AssertRepeat, 1, \ 2826 "number of times to evaluate expression in assert " \ 2827 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2828 \ 2829 notproduct(ccstrlist, SuppressErrorAt, "", \ 2830 "List of assertions (file:line) to muzzle") \ 2831 \ 2832 notproduct(uintx, HandleAllocationLimit, 1024, \ 2833 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2834 "is used") \ 2835 \ 2836 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2837 "Threshold for total handle allocation when " \ 2838 "+TraceHandleAllocation is used") \ 2839 \ 2840 develop(intx, StackPrintLimit, 100, \ 2841 "number of stack frames to print in VM-level stack dump") \ 2842 \ 2843 notproduct(intx, MaxElementPrintSize, 256, \ 2844 "maximum number of elements to print") \ 2845 \ 2846 notproduct(intx, MaxSubklassPrintSize, 4, \ 2847 "maximum number of subklasses to print when printing klass") \ 2848 \ 2849 product(intx, MaxInlineLevel, 9, \ 2850 "maximum number of nested calls that are inlined") \ 2851 \ 2852 product(intx, MaxRecursiveInlineLevel, 1, \ 2853 "maximum number of nested recursive calls that are inlined") \ 2854 \ 2855 product_pd(intx, InlineSmallCode, \ 2856 "Only inline already compiled methods if their code size is " \ 2857 "less than this") \ 2858 \ 2859 product(intx, MaxInlineSize, 35, \ 2860 "maximum bytecode size of a method to be inlined") \ 2861 \ 2862 product_pd(intx, FreqInlineSize, \ 2863 "maximum bytecode size of a frequent method to be inlined") \ 2864 \ 2865 product(intx, MaxTrivialSize, 6, \ 2866 "maximum bytecode size of a trivial method to be inlined") \ 2867 \ 2868 product(intx, MinInliningThreshold, 250, \ 2869 "min. invocation count a method needs to have to be inlined") \ 2870 \ 2871 develop(intx, MethodHistogramCutoff, 100, \ 2872 "cutoff value for method invoc. histogram (+CountCalls)") \ 2873 \ 2874 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2875 "# of interpreted methods to show in profile") \ 2876 \ 2877 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2878 "# of compiled methods to show in profile") \ 2879 \ 2880 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2881 "# of stub methods to show in profile") \ 2882 \ 2883 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2884 "# of runtime stub nodes to show in profile") \ 2885 \ 2886 product(intx, ProfileIntervalsTicks, 100, \ 2887 "# of ticks between printing of interval profile " \ 2888 "(+ProfileIntervals)") \ 2889 \ 2890 notproduct(intx, ScavengeALotInterval, 1, \ 2891 "Interval between which scavenge will occur with +ScavengeALot") \ 2892 \ 2893 notproduct(intx, FullGCALotInterval, 1, \ 2894 "Interval between which full gc will occur with +FullGCALot") \ 2895 \ 2896 notproduct(intx, FullGCALotStart, 0, \ 2897 "For which invocation to start FullGCAlot") \ 2898 \ 2899 notproduct(intx, FullGCALotDummies, 32*K, \ 2900 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2901 "to move") \ 2902 \ 2903 develop(intx, DontYieldALotInterval, 10, \ 2904 "Interval between which yields will be dropped (milliseconds)") \ 2905 \ 2906 develop(intx, MinSleepInterval, 1, \ 2907 "Minimum sleep() interval (milliseconds) when " \ 2908 "ConvertSleepToYield is off (used for SOLARIS)") \ 2909 \ 2910 develop(intx, ProfilerPCTickThreshold, 15, \ 2911 "Number of ticks in a PC buckets to be a hotspot") \ 2912 \ 2913 notproduct(intx, DeoptimizeALotInterval, 5, \ 2914 "Number of exits until DeoptimizeALot kicks in") \ 2915 \ 2916 notproduct(intx, ZombieALotInterval, 5, \ 2917 "Number of exits until ZombieALot kicks in") \ 2918 \ 2919 develop(bool, StressNonEntrant, false, \ 2920 "Mark nmethods non-entrant at registration") \ 2921 \ 2922 diagnostic(intx, MallocVerifyInterval, 0, \ 2923 "if non-zero, verify C heap after every N calls to " \ 2924 "malloc/realloc/free") \ 2925 \ 2926 diagnostic(intx, MallocVerifyStart, 0, \ 2927 "if non-zero, start verifying C heap after Nth call to " \ 2928 "malloc/realloc/free") \ 2929 \ 2930 diagnostic(uintx, MallocMaxTestWords, 0, \ 2931 "if non-zero, max # of Words that malloc/realloc can allocate " \ 2932 "(for testing only)") \ 2933 \ 2934 product(intx, TypeProfileWidth, 2, \ 2935 "number of receiver types to record in call/cast profile") \ 2936 \ 2937 develop(intx, BciProfileWidth, 2, \ 2938 "number of return bci's to record in ret profile") \ 2939 \ 2940 product(intx, PerMethodRecompilationCutoff, 400, \ 2941 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2942 \ 2943 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2944 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2945 \ 2946 product(intx, PerMethodTrapLimit, 100, \ 2947 "Limit on traps (of one kind) in a method (includes inlines)") \ 2948 \ 2949 product(intx, PerBytecodeTrapLimit, 4, \ 2950 "Limit on traps (of one kind) at a particular BCI") \ 2951 \ 2952 develop(intx, InlineFrequencyRatio, 20, \ 2953 "Ratio of call site execution to caller method invocation") \ 2954 \ 2955 develop_pd(intx, InlineFrequencyCount, \ 2956 "Count of call site execution necessary to trigger frequent " \ 2957 "inlining") \ 2958 \ 2959 develop(intx, InlineThrowCount, 50, \ 2960 "Force inlining of interpreted methods that throw this often") \ 2961 \ 2962 develop(intx, InlineThrowMaxSize, 200, \ 2963 "Force inlining of throwing methods smaller than this") \ 2964 \ 2965 develop(intx, ProfilerNodeSize, 1024, \ 2966 "Size in K to allocate for the Profile Nodes of each thread") \ 2967 \ 2968 product_pd(intx, PreInflateSpin, \ 2969 "Number of times to spin wait before inflation") \ 2970 \ 2971 /* gc parameters */ \ 2972 product(uintx, InitialHeapSize, 0, \ 2973 "Initial heap size (in bytes); zero means use ergonomics") \ 2974 \ 2975 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 2976 "Maximum heap size (in bytes)") \ 2977 \ 2978 product(uintx, OldSize, ScaleForWordSize(4*M), \ 2979 "Initial tenured generation size (in bytes)") \ 2980 \ 2981 product(uintx, NewSize, ScaleForWordSize(1*M), \ 2982 "Initial new generation size (in bytes)") \ 2983 \ 2984 product(uintx, MaxNewSize, max_uintx, \ 2985 "Maximum new generation size (in bytes), max_uintx means set " \ 2986 "ergonomically") \ 2987 \ 2988 product(uintx, PretenureSizeThreshold, 0, \ 2989 "Maximum size in bytes of objects allocated in DefNew " \ 2990 "generation; zero means no maximum") \ 2991 \ 2992 product(uintx, TLABSize, 0, \ 2993 "Starting TLAB size (in bytes); zero means set ergonomically") \ 2994 \ 2995 product(uintx, MinTLABSize, 2*K, \ 2996 "Minimum allowed TLAB size (in bytes)") \ 2997 \ 2998 product(uintx, TLABAllocationWeight, 35, \ 2999 "Allocation averaging weight") \ 3000 \ 3001 product(uintx, TLABWasteTargetPercent, 1, \ 3002 "Percentage of Eden that can be wasted") \ 3003 \ 3004 product(uintx, TLABRefillWasteFraction, 64, \ 3005 "Max TLAB waste at a refill (internal fragmentation)") \ 3006 \ 3007 product(uintx, TLABWasteIncrement, 4, \ 3008 "Increment allowed waste at slow allocation") \ 3009 \ 3010 product(uintx, SurvivorRatio, 8, \ 3011 "Ratio of eden/survivor space size") \ 3012 \ 3013 product(uintx, NewRatio, 2, \ 3014 "Ratio of new/old generation sizes") \ 3015 \ 3016 product_pd(uintx, NewSizeThreadIncrease, \ 3017 "Additional size added to desired new generation size per " \ 3018 "non-daemon thread (in bytes)") \ 3019 \ 3020 product_pd(uintx, MetaspaceSize, \ 3021 "Initial size of Metaspaces (in bytes)") \ 3022 \ 3023 product(uintx, MaxMetaspaceSize, max_uintx, \ 3024 "Maximum size of Metaspaces (in bytes)") \ 3025 \ 3026 product(uintx, ClassMetaspaceSize, 2*M, \ 3027 "Maximum size of InstanceKlass area in Metaspace used for " \ 3028 "UseCompressedKlassPointers") \ 3029 \ 3030 product(uintx, MinHeapFreeRatio, 40, \ 3031 "Min percentage of heap free after GC to avoid expansion") \ 3032 \ 3033 product(uintx, MaxHeapFreeRatio, 70, \ 3034 "Max percentage of heap free after GC to avoid shrinking") \ 3035 \ 3036 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3037 "Number of milliseconds per MB of free space in the heap") \ 3038 \ 3039 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3040 "Min change in heap space due to GC (in bytes)") \ 3041 \ 3042 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3043 "Min expansion of Metaspace (in bytes)") \ 3044 \ 3045 product(uintx, MinMetaspaceFreeRatio, 40, \ 3046 "Min percentage of Metaspace free after GC to avoid expansion") \ 3047 \ 3048 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3049 "Max percentage of Metaspace free after GC to avoid shrinking") \ 3050 \ 3051 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3052 "Max expansion of Metaspace without full GC (in bytes)") \ 3053 \ 3054 product(uintx, QueuedAllocationWarningCount, 0, \ 3055 "Number of times an allocation that queues behind a GC " \ 3056 "will retry before printing a warning") \ 3057 \ 3058 diagnostic(uintx, VerifyGCStartAt, 0, \ 3059 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3060 \ 3061 diagnostic(intx, VerifyGCLevel, 0, \ 3062 "Generation level at which to start +VerifyBefore/AfterGC") \ 3063 \ 3064 product(uintx, MaxTenuringThreshold, 15, \ 3065 "Maximum value for tenuring threshold") \ 3066 \ 3067 product(uintx, InitialTenuringThreshold, 7, \ 3068 "Initial value for tenuring threshold") \ 3069 \ 3070 product(uintx, TargetSurvivorRatio, 50, \ 3071 "Desired percentage of survivor space used after scavenge") \ 3072 \ 3073 product(uintx, MarkSweepDeadRatio, 5, \ 3074 "Percentage (0-100) of the old gen allowed as dead wood." \ 3075 "Serial mark sweep treats this as both the min and max value." \ 3076 "CMS uses this value only if it falls back to mark sweep." \ 3077 "Par compact uses a variable scale based on the density of the" \ 3078 "generation and treats this as the max value when the heap is" \ 3079 "either completely full or completely empty. Par compact also" \ 3080 "has a smaller default value; see arguments.cpp.") \ 3081 \ 3082 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3083 "How often should we fully compact the heap (ignoring the dead " \ 3084 "space parameters)") \ 3085 \ 3086 product(intx, PrintCMSStatistics, 0, \ 3087 "Statistics for CMS") \ 3088 \ 3089 product(bool, PrintCMSInitiationStatistics, false, \ 3090 "Statistics for initiating a CMS collection") \ 3091 \ 3092 product(intx, PrintFLSStatistics, 0, \ 3093 "Statistics for CMS' FreeListSpace") \ 3094 \ 3095 product(intx, PrintFLSCensus, 0, \ 3096 "Census for CMS' FreeListSpace") \ 3097 \ 3098 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3099 "Delay in ms between expansion and allocation") \ 3100 \ 3101 develop(uintx, GCWorkerDelayMillis, 0, \ 3102 "Delay in ms in scheduling GC workers") \ 3103 \ 3104 product(intx, DeferThrSuspendLoopCount, 4000, \ 3105 "(Unstable) Number of times to iterate in safepoint loop " \ 3106 " before blocking VM threads ") \ 3107 \ 3108 product(intx, DeferPollingPageLoopCount, -1, \ 3109 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3110 "before changing safepoint polling page to RO ") \ 3111 \ 3112 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3113 \ 3114 product(bool, PSChunkLargeArrays, true, \ 3115 "true: process large arrays in chunks") \ 3116 \ 3117 product(uintx, GCDrainStackTargetSize, 64, \ 3118 "how many entries we'll try to leave on the stack during " \ 3119 "parallel GC") \ 3120 \ 3121 /* stack parameters */ \ 3122 product_pd(intx, StackYellowPages, \ 3123 "Number of yellow zone (recoverable overflows) pages") \ 3124 \ 3125 product_pd(intx, StackRedPages, \ 3126 "Number of red zone (unrecoverable overflows) pages") \ 3127 \ 3128 product_pd(intx, StackShadowPages, \ 3129 "Number of shadow zone (for overflow checking) pages" \ 3130 " this should exceed the depth of the VM and native call stack") \ 3131 \ 3132 product_pd(intx, ThreadStackSize, \ 3133 "Thread Stack Size (in Kbytes)") \ 3134 \ 3135 product_pd(intx, VMThreadStackSize, \ 3136 "Non-Java Thread Stack Size (in Kbytes)") \ 3137 \ 3138 product_pd(intx, CompilerThreadStackSize, \ 3139 "Compiler Thread Stack Size (in Kbytes)") \ 3140 \ 3141 develop_pd(uintx, JVMInvokeMethodSlack, \ 3142 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3143 \ 3144 product(uintx, ThreadSafetyMargin, 50*M, \ 3145 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3146 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3147 "disable this feature") \ 3148 \ 3149 /* code cache parameters */ \ 3150 develop(uintx, CodeCacheSegmentSize, 64, \ 3151 "Code cache segment size (in bytes) - smallest unit of " \ 3152 "allocation") \ 3153 \ 3154 develop_pd(intx, CodeEntryAlignment, \ 3155 "Code entry alignment for generated code (in bytes)") \ 3156 \ 3157 product_pd(intx, OptoLoopAlignment, \ 3158 "Align inner loops to zero relative to this modulus") \ 3159 \ 3160 product_pd(uintx, InitialCodeCacheSize, \ 3161 "Initial code cache size (in bytes)") \ 3162 \ 3163 product_pd(uintx, ReservedCodeCacheSize, \ 3164 "Reserved code cache size (in bytes) - maximum code cache size") \ 3165 \ 3166 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3167 "When less than X space left, we stop compiling.") \ 3168 \ 3169 product_pd(uintx, CodeCacheExpansionSize, \ 3170 "Code cache expansion size (in bytes)") \ 3171 \ 3172 develop_pd(uintx, CodeCacheMinBlockLength, \ 3173 "Minimum number of segments in a code cache block.") \ 3174 \ 3175 notproduct(bool, ExitOnFullCodeCache, false, \ 3176 "Exit the VM if we fill the code cache.") \ 3177 \ 3178 product(bool, UseCodeCacheFlushing, true, \ 3179 "Attempt to clean the code cache before shutting off compiler") \ 3180 \ 3181 product(intx, MinCodeCacheFlushingInterval, 30, \ 3182 "Min number of seconds between code cache cleaning sessions") \ 3183 \ 3184 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3185 "When less than X space left, start code cache cleaning") \ 3186 \ 3187 product(uintx, CodeCacheFlushingFraction, 2, \ 3188 "Fraction of the code cache that is flushed when full") \ 3189 \ 3190 /* interpreter debugging */ \ 3191 develop(intx, BinarySwitchThreshold, 5, \ 3192 "Minimal number of lookupswitch entries for rewriting to binary " \ 3193 "switch") \ 3194 \ 3195 develop(intx, StopInterpreterAt, 0, \ 3196 "Stops interpreter execution at specified bytecode number") \ 3197 \ 3198 develop(intx, TraceBytecodesAt, 0, \ 3199 "Traces bytecodes starting with specified bytecode number") \ 3200 \ 3201 /* compiler interface */ \ 3202 develop(intx, CIStart, 0, \ 3203 "the id of the first compilation to permit") \ 3204 \ 3205 develop(intx, CIStop, -1, \ 3206 "the id of the last compilation to permit") \ 3207 \ 3208 develop(intx, CIStartOSR, 0, \ 3209 "the id of the first osr compilation to permit " \ 3210 "(CICountOSR must be on)") \ 3211 \ 3212 develop(intx, CIStopOSR, -1, \ 3213 "the id of the last osr compilation to permit " \ 3214 "(CICountOSR must be on)") \ 3215 \ 3216 develop(intx, CIBreakAtOSR, -1, \ 3217 "id of osr compilation to break at") \ 3218 \ 3219 develop(intx, CIBreakAt, -1, \ 3220 "id of compilation to break at") \ 3221 \ 3222 product(ccstrlist, CompileOnly, "", \ 3223 "List of methods (pkg/class.name) to restrict compilation to") \ 3224 \ 3225 product(ccstr, CompileCommandFile, NULL, \ 3226 "Read compiler commands from this file [.hotspot_compiler]") \ 3227 \ 3228 product(ccstrlist, CompileCommand, "", \ 3229 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3230 \ 3231 develop(bool, ReplayCompiles, false, \ 3232 "Enable replay of compilations from ReplayDataFile") \ 3233 \ 3234 product(ccstr, ReplayDataFile, NULL, \ 3235 "File containing compilation replay information" \ 3236 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3237 \ 3238 develop(intx, ReplaySuppressInitializers, 2, \ 3239 "Controls handling of class initialization during replay" \ 3240 "0 - don't do anything special" \ 3241 "1 - treat all class initializers as empty" \ 3242 "2 - treat class initializers for application classes as empty" \ 3243 "3 - allow all class initializers to run during bootstrap but" \ 3244 " pretend they are empty after starting replay") \ 3245 \ 3246 develop(bool, ReplayIgnoreInitErrors, false, \ 3247 "Ignore exceptions thrown during initialization for replay") \ 3248 \ 3249 product(bool, DumpReplayDataOnError, true, \ 3250 "Record replay data for crashing compiler threads") \ 3251 \ 3252 product(bool, CICompilerCountPerCPU, false, \ 3253 "1 compiler thread for log(N CPUs)") \ 3254 \ 3255 develop(intx, CIFireOOMAt, -1, \ 3256 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3257 "(non-negative value throws OOM after this many CI accesses " \ 3258 "in each compile)") \ 3259 notproduct(intx, CICrashAt, -1, \ 3260 "id of compilation to trigger assert in compiler thread for " \ 3261 "the purpose of testing, e.g. generation of replay data") \ 3262 notproduct(bool, CIObjectFactoryVerify, false, \ 3263 "enable potentially expensive verification in ciObjectFactory") \ 3264 \ 3265 /* Priorities */ \ 3266 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3267 \ 3268 product(intx, ThreadPriorityPolicy, 0, \ 3269 "0 : Normal. "\ 3270 " VM chooses priorities that are appropriate for normal "\ 3271 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3272 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3273 " map to lower native priority values. On Windows applications"\ 3274 " are allowed to use higher native priorities. However, with "\ 3275 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3276 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3277 " interfere with system threads. On Linux thread priorities "\ 3278 " are ignored because the OS does not support static priority "\ 3279 " in SCHED_OTHER scheduling class which is the only choice for"\ 3280 " non-root, non-realtime applications. "\ 3281 "1 : Aggressive. "\ 3282 " Java thread priorities map over to the entire range of "\ 3283 " native thread priorities. Higher Java thread priorities map "\ 3284 " to higher native thread priorities. This policy should be "\ 3285 " used with care, as sometimes it can cause performance "\ 3286 " degradation in the application and/or the entire system. On "\ 3287 " Linux this policy requires root privilege.") \ 3288 \ 3289 product(bool, ThreadPriorityVerbose, false, \ 3290 "Print priority changes") \ 3291 \ 3292 product(intx, DefaultThreadPriority, -1, \ 3293 "The native priority at which threads run if not elsewhere " \ 3294 "specified (-1 means no change)") \ 3295 \ 3296 product(intx, CompilerThreadPriority, -1, \ 3297 "The native priority at which compiler threads should run " \ 3298 "(-1 means no change)") \ 3299 \ 3300 product(intx, VMThreadPriority, -1, \ 3301 "The native priority at which the VM thread should run " \ 3302 "(-1 means no change)") \ 3303 \ 3304 product(bool, CompilerThreadHintNoPreempt, true, \ 3305 "(Solaris only) Give compiler threads an extra quanta") \ 3306 \ 3307 product(bool, VMThreadHintNoPreempt, false, \ 3308 "(Solaris only) Give VM thread an extra quanta") \ 3309 \ 3310 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3311 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3312 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3313 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3314 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3315 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3316 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3317 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3318 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3319 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3320 \ 3321 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3322 "Java thread priority 10 maps to critical scheduling priority") \ 3323 \ 3324 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3325 "Compiler thread(s) run at critical scheduling priority") \ 3326 \ 3327 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3328 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3329 \ 3330 /* compiler debugging */ \ 3331 notproduct(intx, CompileTheWorldStartAt, 1, \ 3332 "First class to consider when using +CompileTheWorld") \ 3333 \ 3334 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3335 "Last class to consider when using +CompileTheWorld") \ 3336 \ 3337 develop(intx, NewCodeParameter, 0, \ 3338 "Testing Only: Create a dedicated integer parameter before " \ 3339 "putback") \ 3340 \ 3341 /* new oopmap storage allocation */ \ 3342 develop(intx, MinOopMapAllocation, 8, \ 3343 "Minimum number of OopMap entries in an OopMapSet") \ 3344 \ 3345 /* Background Compilation */ \ 3346 develop(intx, LongCompileThreshold, 50, \ 3347 "Used with +TraceLongCompiles") \ 3348 \ 3349 product(intx, StarvationMonitorInterval, 200, \ 3350 "Pause between each check in ms") \ 3351 \ 3352 /* recompilation */ \ 3353 product_pd(intx, CompileThreshold, \ 3354 "number of interpreted method invocations before (re-)compiling") \ 3355 \ 3356 product_pd(intx, BackEdgeThreshold, \ 3357 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3358 \ 3359 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3360 "Interpreter (tier 0) invocation notification frequency.") \ 3361 \ 3362 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3363 "C1 without MDO (tier 2) invocation notification frequency.") \ 3364 \ 3365 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3366 "C1 with MDO profiling (tier 3) invocation notification " \ 3367 "frequency.") \ 3368 \ 3369 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3370 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3371 \ 3372 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3373 "Interpreter (tier 0) invocation notification frequency.") \ 3374 \ 3375 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3376 "C1 without MDO (tier 2) invocation notification frequency.") \ 3377 \ 3378 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3379 "C1 with MDO profiling (tier 3) invocation notification " \ 3380 "frequency.") \ 3381 \ 3382 product(intx, Tier2CompileThreshold, 0, \ 3383 "threshold at which tier 2 compilation is invoked") \ 3384 \ 3385 product(intx, Tier2BackEdgeThreshold, 0, \ 3386 "Back edge threshold at which tier 2 compilation is invoked") \ 3387 \ 3388 product(intx, Tier3InvocationThreshold, 200, \ 3389 "Compile if number of method invocations crosses this " \ 3390 "threshold") \ 3391 \ 3392 product(intx, Tier3MinInvocationThreshold, 100, \ 3393 "Minimum invocation to compile at tier 3") \ 3394 \ 3395 product(intx, Tier3CompileThreshold, 2000, \ 3396 "Threshold at which tier 3 compilation is invoked (invocation " \ 3397 "minimum must be satisfied.") \ 3398 \ 3399 product(intx, Tier3BackEdgeThreshold, 60000, \ 3400 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3401 \ 3402 product(intx, Tier4InvocationThreshold, 5000, \ 3403 "Compile if number of method invocations crosses this " \ 3404 "threshold") \ 3405 \ 3406 product(intx, Tier4MinInvocationThreshold, 600, \ 3407 "Minimum invocation to compile at tier 4") \ 3408 \ 3409 product(intx, Tier4CompileThreshold, 15000, \ 3410 "Threshold at which tier 4 compilation is invoked (invocation " \ 3411 "minimum must be satisfied.") \ 3412 \ 3413 product(intx, Tier4BackEdgeThreshold, 40000, \ 3414 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3415 \ 3416 product(intx, Tier3DelayOn, 5, \ 3417 "If C2 queue size grows over this amount per compiler thread " \ 3418 "stop compiling at tier 3 and start compiling at tier 2") \ 3419 \ 3420 product(intx, Tier3DelayOff, 2, \ 3421 "If C2 queue size is less than this amount per compiler thread " \ 3422 "allow methods compiled at tier 2 transition to tier 3") \ 3423 \ 3424 product(intx, Tier3LoadFeedback, 5, \ 3425 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3426 "reaches this amount per compiler thread") \ 3427 \ 3428 product(intx, Tier4LoadFeedback, 3, \ 3429 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3430 "reaches this amount per compiler thread") \ 3431 \ 3432 product(intx, TieredCompileTaskTimeout, 50, \ 3433 "Kill compile task if method was not used within " \ 3434 "given timeout in milliseconds") \ 3435 \ 3436 product(intx, TieredStopAtLevel, 4, \ 3437 "Stop at given compilation level") \ 3438 \ 3439 product(intx, Tier0ProfilingStartPercentage, 200, \ 3440 "Start profiling in interpreter if the counters exceed tier 3" \ 3441 "thresholds by the specified percentage") \ 3442 \ 3443 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3444 "Increase the compile threshold for C1 compilation if the code" \ 3445 "cache is filled by the specified percentage.") \ 3446 \ 3447 product(intx, TieredRateUpdateMinTime, 1, \ 3448 "Minimum rate sampling interval (in milliseconds)") \ 3449 \ 3450 product(intx, TieredRateUpdateMaxTime, 25, \ 3451 "Maximum rate sampling interval (in milliseconds)") \ 3452 \ 3453 product_pd(bool, TieredCompilation, \ 3454 "Enable tiered compilation") \ 3455 \ 3456 product(bool, PrintTieredEvents, false, \ 3457 "Print tiered events notifications") \ 3458 \ 3459 product_pd(intx, OnStackReplacePercentage, \ 3460 "NON_TIERED number of method invocations/branches (expressed as %"\ 3461 "of CompileThreshold) before (re-)compiling OSR code") \ 3462 \ 3463 product(intx, InterpreterProfilePercentage, 33, \ 3464 "NON_TIERED number of method invocations/branches (expressed as %"\ 3465 "of CompileThreshold) before profiling in the interpreter") \ 3466 \ 3467 develop(intx, MaxRecompilationSearchLength, 10, \ 3468 "max. # frames to inspect searching for recompilee") \ 3469 \ 3470 develop(intx, MaxInterpretedSearchLength, 3, \ 3471 "max. # interp. frames to skip when searching for recompilee") \ 3472 \ 3473 develop(intx, DesiredMethodLimit, 8000, \ 3474 "desired max. method size (in bytecodes) after inlining") \ 3475 \ 3476 develop(intx, HugeMethodLimit, 8000, \ 3477 "don't compile methods larger than this if " \ 3478 "+DontCompileHugeMethods") \ 3479 \ 3480 /* New JDK 1.4 reflection implementation */ \ 3481 \ 3482 develop(bool, UseNewReflection, true, \ 3483 "Temporary flag for transition to reflection based on dynamic " \ 3484 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3485 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3486 "changes were needed") \ 3487 \ 3488 develop(bool, VerifyReflectionBytecodes, false, \ 3489 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3490 "in situations like that described in 4486457 or for " \ 3491 "constructors generated for serialization, so can not be enabled "\ 3492 "in product.") \ 3493 \ 3494 product(bool, ReflectionWrapResolutionErrors, true, \ 3495 "Temporary flag for transition to AbstractMethodError wrapped " \ 3496 "in InvocationTargetException. See 6531596") \ 3497 \ 3498 \ 3499 develop(intx, FastSuperclassLimit, 8, \ 3500 "Depth of hardwired instanceof accelerator array") \ 3501 \ 3502 /* Properties for Java libraries */ \ 3503 \ 3504 product(uintx, MaxDirectMemorySize, 0, \ 3505 "Maximum total size of NIO direct-buffer allocations") \ 3506 \ 3507 /* temporary developer defined flags */ \ 3508 \ 3509 diagnostic(bool, UseNewCode, false, \ 3510 "Testing Only: Use the new version while testing") \ 3511 \ 3512 diagnostic(bool, UseNewCode2, false, \ 3513 "Testing Only: Use the new version while testing") \ 3514 \ 3515 diagnostic(bool, UseNewCode3, false, \ 3516 "Testing Only: Use the new version while testing") \ 3517 \ 3518 /* flags for performance data collection */ \ 3519 \ 3520 product(bool, UsePerfData, falseInEmbedded, \ 3521 "Flag to disable jvmstat instrumentation for performance testing" \ 3522 "and problem isolation purposes.") \ 3523 \ 3524 product(bool, PerfDataSaveToFile, false, \ 3525 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3526 \ 3527 product(ccstr, PerfDataSaveFile, NULL, \ 3528 "Save PerfData memory to the specified absolute pathname," \ 3529 "%p in the file name if present will be replaced by pid") \ 3530 \ 3531 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3532 "Data sampling interval in milliseconds") \ 3533 \ 3534 develop(bool, PerfTraceDataCreation, false, \ 3535 "Trace creation of Performance Data Entries") \ 3536 \ 3537 develop(bool, PerfTraceMemOps, false, \ 3538 "Trace PerfMemory create/attach/detach calls") \ 3539 \ 3540 product(bool, PerfDisableSharedMem, false, \ 3541 "Store performance data in standard memory") \ 3542 \ 3543 product(intx, PerfDataMemorySize, 32*K, \ 3544 "Size of performance data memory region. Will be rounded " \ 3545 "up to a multiple of the native os page size.") \ 3546 \ 3547 product(intx, PerfMaxStringConstLength, 1024, \ 3548 "Maximum PerfStringConstant string length before truncation") \ 3549 \ 3550 product(bool, PerfAllowAtExitRegistration, false, \ 3551 "Allow registration of atexit() methods") \ 3552 \ 3553 product(bool, PerfBypassFileSystemCheck, false, \ 3554 "Bypass Win32 file system criteria checks (Windows Only)") \ 3555 \ 3556 product(intx, UnguardOnExecutionViolation, 0, \ 3557 "Unguard page and retry on no-execute fault (Win32 only)" \ 3558 "0=off, 1=conservative, 2=aggressive") \ 3559 \ 3560 /* Serviceability Support */ \ 3561 \ 3562 product(bool, ManagementServer, false, \ 3563 "Create JMX Management Server") \ 3564 \ 3565 product(bool, DisableAttachMechanism, false, \ 3566 "Disable mechanism that allows tools to attach to this VM") \ 3567 \ 3568 product(bool, StartAttachListener, false, \ 3569 "Always start Attach Listener at VM startup") \ 3570 \ 3571 manageable(bool, PrintConcurrentLocks, false, \ 3572 "Print java.util.concurrent locks in thread dump") \ 3573 \ 3574 product(bool, TransmitErrorReport, false, \ 3575 "Enable error report transmission on erroneous termination") \ 3576 \ 3577 product(ccstr, ErrorReportServer, NULL, \ 3578 "Override built-in error report server address") \ 3579 \ 3580 /* Shared spaces */ \ 3581 \ 3582 product(bool, UseSharedSpaces, true, \ 3583 "Use shared spaces for metadata") \ 3584 \ 3585 product(bool, RequireSharedSpaces, false, \ 3586 "Require shared spaces for metadata") \ 3587 \ 3588 product(bool, DumpSharedSpaces, false, \ 3589 "Special mode: JVM reads a class list, loads classes, builds " \ 3590 "shared spaces, and dumps the shared spaces to a file to be " \ 3591 "used in future JVM runs.") \ 3592 \ 3593 product(bool, PrintSharedSpaces, false, \ 3594 "Print usage of shared spaces") \ 3595 \ 3596 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3597 "Size of read-write space for metadata (in bytes)") \ 3598 \ 3599 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3600 "Size of read-only space for metadata (in bytes)") \ 3601 \ 3602 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3603 "Size of the shared miscellaneous data area (in bytes)") \ 3604 \ 3605 product(uintx, SharedMiscCodeSize, 120*K, \ 3606 "Size of the shared miscellaneous code area (in bytes)") \ 3607 \ 3608 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 3609 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3610 "Address to allocate shared memory region for class data") \ 3611 \ 3612 diagnostic(bool, EnableInvokeDynamic, true, \ 3613 "support JSR 292 (method handles, invokedynamic, " \ 3614 "anonymous classes") \ 3615 \ 3616 diagnostic(bool, PrintMethodHandleStubs, false, \ 3617 "Print generated stub code for method handles") \ 3618 \ 3619 develop(bool, TraceMethodHandles, false, \ 3620 "trace internal method handle operations") \ 3621 \ 3622 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3623 "perform extra checks when constructing method handles") \ 3624 \ 3625 diagnostic(bool, ShowHiddenFrames, false, \ 3626 "show method handle implementation frames (usually hidden)") \ 3627 \ 3628 experimental(bool, TrustFinalNonStaticFields, false, \ 3629 "trust final non-static declarations for constant folding") \ 3630 \ 3631 develop(bool, TraceInvokeDynamic, false, \ 3632 "trace internal invoke dynamic operations") \ 3633 \ 3634 diagnostic(bool, PauseAtStartup, false, \ 3635 "Causes the VM to pause at startup time and wait for the pause " \ 3636 "file to be removed (default: ./vm.paused.<pid>)") \ 3637 \ 3638 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3639 "The file to create and for whose removal to await when pausing " \ 3640 "at startup. (default: ./vm.paused.<pid>)") \ 3641 \ 3642 diagnostic(bool, PauseAtExit, false, \ 3643 "Pause and wait for keypress on exit if a debugger is attached") \ 3644 \ 3645 product(bool, ExtendedDTraceProbes, false, \ 3646 "Enable performance-impacting dtrace probes") \ 3647 \ 3648 product(bool, DTraceMethodProbes, false, \ 3649 "Enable dtrace probes for method-entry and method-exit") \ 3650 \ 3651 product(bool, DTraceAllocProbes, false, \ 3652 "Enable dtrace probes for object allocation") \ 3653 \ 3654 product(bool, DTraceMonitorProbes, false, \ 3655 "Enable dtrace probes for monitor events") \ 3656 \ 3657 product(bool, RelaxAccessControlCheck, false, \ 3658 "Relax the access control checks in the verifier") \ 3659 \ 3660 diagnostic(bool, PrintDTraceDOF, false, \ 3661 "Print the DTrace DOF passed to the system for JSDT probes") \ 3662 \ 3663 product(uintx, StringTableSize, defaultStringTableSize, \ 3664 "Number of buckets in the interned String table") \ 3665 \ 3666 develop(bool, TraceDefaultMethods, false, \ 3667 "Trace the default method processing steps") \ 3668 \ 3669 develop(bool, ParseAllGenericSignatures, false, \ 3670 "Parse all generic signatures while classloading") \ 3671 \ 3672 develop(bool, VerifyGenericSignatures, false, \ 3673 "Abort VM on erroneous or inconsistent generic signatures") \ 3674 \ 3675 product(bool, UseVMInterruptibleIO, false, \ 3676 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3677 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3678 " of this flag is true for JDK 6 and earlier") \ 3679 \ 3680 diagnostic(bool, WhiteBoxAPI, false, \ 3681 "Enable internal testing APIs") \ 3682 \ 3683 product(bool, PrintGCCause, true, \ 3684 "Include GC cause in GC logging") \ 3685 \ 3686 product(bool , AllowNonVirtualCalls, false, \ 3687 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 3688 \ 3689 diagnostic(ccstr, SharedArchiveFile, NULL, \ 3690 "Override the default location of the CDS archive file") \ 3691 \ 3692 experimental(uintx, ArrayAllocatorMallocLimit, \ 3693 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \ 3694 "Allocation less than this value will be allocated " \ 3695 "using malloc. Larger allocations will use mmap.") \ 3696 \ 3697 product(bool, EnableTracing, false, \ 3698 "Enable event-based tracing") \ 3699 product(bool, UseLockedTracing, false, \ 3700 "Use locked-tracing when doing event-based tracing") 3701 3702 3703/* 3704 * Macros for factoring of globals 3705 */ 3706 3707// Interface macros 3708#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3709#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3710#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3711#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3712#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3713#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3714#ifdef PRODUCT 3715#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3716#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3717#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3718#else 3719#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3720#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3721#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3722#endif 3723// Special LP64 flags, product only needed for now. 3724#ifdef _LP64 3725#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3726#else 3727#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3728#endif // _LP64 3729 3730// Implementation macros 3731#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3732#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3733#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3734#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3735#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3736#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3737#ifdef PRODUCT 3738#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3739#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3740#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3741#else 3742#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3743#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3744#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3745#endif 3746#ifdef _LP64 3747#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3748#else 3749#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3750#endif // _LP64 3751 3752RUNTIME_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) 3753 3754RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3755 3756ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3757 3758// Extensions 3759 3760#include "runtime/globals_ext.hpp" 3761 3762#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3763