globals.hpp revision 5503:bfd52054aeb8
1213496Scognet/* 2213496Scognet * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3238330Simp * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4213496Scognet * 5213496Scognet * This code is free software; you can redistribute it and/or modify it 6213496Scognet * under the terms of the GNU General Public License version 2 only, as 7238330Simp * published by the Free Software Foundation. 8213496Scognet * 9238330Simp * This code is distributed in the hope that it will be useful, but WITHOUT 10213496Scognet * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11238330Simp * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12213496Scognet * version 2 for more details (a copy is included in the LICENSE file that 13213496Scognet * accompanied this code). 14236989Simp * 15213496Scognet * You should have received a copy of the GNU General Public License version 16213496Scognet * 2 along with this work; if not, write to the Free Software Foundation, 17213496Scognet * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18213496Scognet * 19236989Simp * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20236989Simp * or visit www.oracle.com if you need additional information or have any 21213496Scognet * questions. 22213496Scognet * 23213496Scognet */ 24213496Scognet 25236989Simp#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26213496Scognet#define SHARE_VM_RUNTIME_GLOBALS_HPP 27213496Scognet 28236989Simp#include "utilities/debug.hpp" 29213496Scognet 30213496Scognet// use this for flags that are true per default in the tiered build 31213496Scognet// but false in non-tiered builds, and vice versa 32213496Scognet#ifdef TIERED 33213496Scognet#define trueInTiered true 34213496Scognet#define falseInTiered false 35213496Scognet#else 36213496Scognet#define trueInTiered false 37213496Scognet#define falseInTiered true 38213496Scognet#endif 39213496Scognet 40213496Scognet#ifdef TARGET_ARCH_x86 41213496Scognet# include "globals_x86.hpp" 42236989Simp#endif 43213496Scognet#ifdef TARGET_ARCH_sparc 44213496Scognet# include "globals_sparc.hpp" 45213496Scognet#endif 46213496Scognet#ifdef TARGET_ARCH_zero 47236989Simp# include "globals_zero.hpp" 48213496Scognet#endif 49213496Scognet#ifdef TARGET_ARCH_arm 50213496Scognet# include "globals_arm.hpp" 51213496Scognet#endif 52213496Scognet#ifdef TARGET_ARCH_ppc 53213496Scognet# include "globals_ppc.hpp" 54213496Scognet#endif 55213496Scognet#ifdef TARGET_OS_FAMILY_linux 56213496Scognet# include "globals_linux.hpp" 57213496Scognet#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(intx, CodeCacheMinimumUseSpace, 200*K); 179define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 180define_pd_global(bool, NeverActAsServerClassMachine, true); 181define_pd_global(uint64_t,MaxRAM, 1ULL*G); 182#define CI_COMPILER_COUNT 0 183#else 184 185#ifdef COMPILER2 186#define CI_COMPILER_COUNT 2 187#else 188#define CI_COMPILER_COUNT 1 189#endif // COMPILER2 190 191#endif // no compilers 192 193// string type aliases used only in this file 194typedef const char* ccstr; 195typedef const char* ccstrlist; // represents string arguments which accumulate 196 197struct Flag { 198 enum Flags { 199 // value origin 200 DEFAULT = 0, 201 COMMAND_LINE = 1, 202 ENVIRON_VAR = 2, 203 CONFIG_FILE = 3, 204 MANAGEMENT = 4, 205 ERGONOMIC = 5, 206 ATTACH_ON_DEMAND = 6, 207 INTERNAL = 7, 208 209 LAST_VALUE_ORIGIN = INTERNAL, 210 VALUE_ORIGIN_BITS = 4, 211 VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 212 213 // flag kind 214 KIND_PRODUCT = 1 << 4, 215 KIND_MANAGEABLE = 1 << 5, 216 KIND_DIAGNOSTIC = 1 << 6, 217 KIND_EXPERIMENTAL = 1 << 7, 218 KIND_NOT_PRODUCT = 1 << 8, 219 KIND_DEVELOP = 1 << 9, 220 KIND_PLATFORM_DEPENDENT = 1 << 10, 221 KIND_READ_WRITE = 1 << 11, 222 KIND_C1 = 1 << 12, 223 KIND_C2 = 1 << 13, 224 KIND_ARCH = 1 << 14, 225 KIND_SHARK = 1 << 15, 226 KIND_LP64_PRODUCT = 1 << 16, 227 KIND_COMMERCIAL = 1 << 17, 228 229 KIND_MASK = ~VALUE_ORIGIN_MASK 230 }; 231 232 const char* _type; 233 const char* _name; 234 void* _addr; 235 NOT_PRODUCT(const char* _doc;) 236 Flags _flags; 237 238 // points to all Flags static array 239 static Flag* flags; 240 241 // number of flags 242 static size_t numFlags; 243 244 static Flag* find_flag(const char* name, size_t length, bool allow_locked = false); 245 static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 246 247 void check_writable(); 248 249 bool is_bool() const; 250 bool get_bool() const; 251 void set_bool(bool value); 252 253 bool is_intx() const; 254 intx get_intx() const; 255 void set_intx(intx value); 256 257 bool is_uintx() const; 258 uintx get_uintx() const; 259 void set_uintx(uintx value); 260 261 bool is_uint64_t() const; 262 uint64_t get_uint64_t() const; 263 void set_uint64_t(uint64_t value); 264 265 bool is_double() const; 266 double get_double() const; 267 void set_double(double value); 268 269 bool is_ccstr() const; 270 bool ccstr_accumulates() const; 271 ccstr get_ccstr() const; 272 void set_ccstr(ccstr value); 273 274 Flags get_origin(); 275 void set_origin(Flags origin); 276 277 bool is_default(); 278 bool is_ergonomic(); 279 bool is_command_line(); 280 281 bool is_product() const; 282 bool is_manageable() const; 283 bool is_diagnostic() const; 284 bool is_experimental() const; 285 bool is_notproduct() const; 286 bool is_develop() const; 287 bool is_read_write() const; 288 bool is_commercial() const; 289 290 bool is_constant_in_binary() const; 291 292 bool is_unlocker() const; 293 bool is_unlocked() const; 294 bool is_writeable() const; 295 bool is_external() const; 296 297 bool is_unlocker_ext() const; 298 bool is_unlocked_ext() const; 299 bool is_writeable_ext() const; 300 bool is_external_ext() const; 301 302 void get_locked_message(char*, int) const; 303 void get_locked_message_ext(char*, int) const; 304 305 void print_on(outputStream* st, bool withComments = false ); 306 void print_kind(outputStream* st); 307 void print_as_flag(outputStream* st); 308}; 309 310// debug flags control various aspects of the VM and are global accessible 311 312// use FlagSetting to temporarily change some debug flag 313// e.g. FlagSetting fs(DebugThisAndThat, true); 314// restored to previous value upon leaving scope 315class FlagSetting { 316 bool val; 317 bool* flag; 318 public: 319 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 320 ~FlagSetting() { *flag = val; } 321}; 322 323 324class CounterSetting { 325 intx* counter; 326 public: 327 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 328 ~CounterSetting() { (*counter)--; } 329}; 330 331 332class UIntFlagSetting { 333 uintx val; 334 uintx* flag; 335 public: 336 UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 337 ~UIntFlagSetting() { *flag = val; } 338}; 339 340 341class DoubleFlagSetting { 342 double val; 343 double* flag; 344 public: 345 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 346 ~DoubleFlagSetting() { *flag = val; } 347}; 348 349 350class CommandLineFlags { 351 public: 352 static bool boolAt(char* name, size_t len, bool* value); 353 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 354 static bool boolAtPut(char* name, size_t len, bool* value, Flag::Flags origin); 355 static bool boolAtPut(char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 356 357 static bool intxAt(char* name, size_t len, intx* value); 358 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 359 static bool intxAtPut(char* name, size_t len, intx* value, Flag::Flags origin); 360 static bool intxAtPut(char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 361 362 static bool uintxAt(char* name, size_t len, uintx* value); 363 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 364 static bool uintxAtPut(char* name, size_t len, uintx* value, Flag::Flags origin); 365 static bool uintxAtPut(char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 366 367 static bool uint64_tAt(char* name, size_t len, uint64_t* value); 368 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 369 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, Flag::Flags origin); 370 static bool uint64_tAtPut(char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 371 372 static bool doubleAt(char* name, size_t len, double* value); 373 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 374 static bool doubleAtPut(char* name, size_t len, double* value, Flag::Flags origin); 375 static bool doubleAtPut(char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 376 377 static bool ccstrAt(char* name, size_t len, ccstr* value); 378 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 379 static bool ccstrAtPut(char* name, size_t len, ccstr* value, Flag::Flags origin); 380 static bool ccstrAtPut(char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 381 382 // Returns false if name is not a command line flag. 383 static bool wasSetOnCmdline(const char* name, bool* value); 384 static void printSetFlags(outputStream* out); 385 386 static void printFlags(outputStream* out, bool withComments); 387 388 static void verify() PRODUCT_RETURN; 389}; 390 391// use this for flags that are true by default in the debug version but 392// false in the optimized version, and vice versa 393#ifdef ASSERT 394#define trueInDebug true 395#define falseInDebug false 396#else 397#define trueInDebug false 398#define falseInDebug true 399#endif 400 401// use this for flags that are true per default in the product build 402// but false in development builds, and vice versa 403#ifdef PRODUCT 404#define trueInProduct true 405#define falseInProduct false 406#else 407#define trueInProduct false 408#define falseInProduct true 409#endif 410 411#ifdef JAVASE_EMBEDDED 412#define falseInEmbedded false 413#else 414#define falseInEmbedded true 415#endif 416 417// develop flags are settable / visible only during development and are constant in the PRODUCT version 418// product flags are always settable / visible 419// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 420 421// A flag must be declared with one of the following types: 422// bool, intx, uintx, ccstr. 423// The type "ccstr" is an alias for "const char*" and is used 424// only in this file, because the macrology requires single-token type names. 425 426// Note: Diagnostic options not meant for VM tuning or for product modes. 427// They are to be used for VM quality assurance or field diagnosis 428// of VM bugs. They are hidden so that users will not be encouraged to 429// try them as if they were VM ordinary execution options. However, they 430// are available in the product version of the VM. Under instruction 431// from support engineers, VM customers can turn them on to collect 432// diagnostic information about VM problems. To use a VM diagnostic 433// option, you must first specify +UnlockDiagnosticVMOptions. 434// (This master switch also affects the behavior of -Xprintflags.) 435// 436// experimental flags are in support of features that are not 437// part of the officially supported product, but are available 438// for experimenting with. They could, for example, be performance 439// features that may not have undergone full or rigorous QA, but which may 440// help performance in some cases and released for experimentation 441// by the community of users and developers. This flag also allows one to 442// be able to build a fully supported product that nonetheless also 443// ships with some unsupported, lightly tested, experimental features. 444// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 445// UnlockExperimentalVMOptions flag, which allows the control and 446// modification of the experimental flags. 447// 448// Nota bene: neither diagnostic nor experimental options should be used casually, 449// and they are not supported on production loads, except under explicit 450// direction from support engineers. 451// 452// manageable flags are writeable external product flags. 453// They are dynamically writeable through the JDK management interface 454// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 455// These flags are external exported interface (see CCC). The list of 456// manageable flags can be queried programmatically through the management 457// interface. 458// 459// A flag can be made as "manageable" only if 460// - the flag is defined in a CCC as an external exported interface. 461// - the VM implementation supports dynamic setting of the flag. 462// This implies that the VM must *always* query the flag variable 463// and not reuse state related to the flag state at any given time. 464// - you want the flag to be queried programmatically by the customers. 465// 466// product_rw flags are writeable internal product flags. 467// They are like "manageable" flags but for internal/private use. 468// The list of product_rw flags are internal/private flags which 469// may be changed/removed in a future release. It can be set 470// through the management interface to get/set value 471// when the name of flag is supplied. 472// 473// A flag can be made as "product_rw" only if 474// - the VM implementation supports dynamic setting of the flag. 475// This implies that the VM must *always* query the flag variable 476// and not reuse state related to the flag state at any given time. 477// 478// Note that when there is a need to support develop flags to be writeable, 479// it can be done in the same way as product_rw. 480 481#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 482 \ 483 lp64_product(bool, UseCompressedOops, false, \ 484 "Use 32-bit object references in 64-bit VM. " \ 485 "lp64_product means flag is always constant in 32 bit VM") \ 486 \ 487 lp64_product(bool, UseCompressedClassPointers, false, \ 488 "Use 32-bit class pointers in 64-bit VM. " \ 489 "lp64_product means flag is always constant in 32 bit VM") \ 490 \ 491 notproduct(bool, CheckCompressedOops, true, \ 492 "Generate checks in encoding/decoding code in debug VM") \ 493 \ 494 product_pd(uintx, HeapBaseMinAddress, \ 495 "OS specific low limit for heap base address") \ 496 \ 497 diagnostic(bool, PrintCompressedOopsMode, false, \ 498 "Print compressed oops base address and encoding mode") \ 499 \ 500 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 501 "Default object alignment in bytes, 8 is minimum") \ 502 \ 503 product(bool, AssumeMP, false, \ 504 "Instruct the VM to assume multiple processors are available") \ 505 \ 506 /* UseMembar is theoretically a temp flag used for memory barrier \ 507 * removal testing. It was supposed to be removed before FCS but has \ 508 * been re-added (see 6401008) */ \ 509 product_pd(bool, UseMembar, \ 510 "(Unstable) Issues membars on thread state transitions") \ 511 \ 512 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 513 * that don't support it. This will be replaced by processor detection \ 514 * logic. \ 515 */ \ 516 product(bool, UsePPCLWSYNC, true, \ 517 "Use lwsync instruction if true, else use slower sync") \ 518 \ 519 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 520 "Clean the chunk pool asynchronously") \ 521 \ 522 /* Temporary: See 6948537 */ \ 523 experimental(bool, UseMemSetInBOT, true, \ 524 "(Unstable) uses memset in BOT updates in GC code") \ 525 \ 526 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 527 "Enable normal processing of flags relating to field diagnostics")\ 528 \ 529 experimental(bool, UnlockExperimentalVMOptions, false, \ 530 "Enable normal processing of flags relating to experimental " \ 531 "features") \ 532 \ 533 product(bool, JavaMonitorsInStackTrace, true, \ 534 "Print information about Java monitor locks when the stacks are" \ 535 "dumped") \ 536 \ 537 product_pd(bool, UseLargePages, \ 538 "Use large page memory") \ 539 \ 540 product_pd(bool, UseLargePagesIndividualAllocation, \ 541 "Allocate large pages individually for better affinity") \ 542 \ 543 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 544 "Fail large pages individual allocation") \ 545 \ 546 product(bool, UseLargePagesInMetaspace, false, \ 547 "Use large page memory in metaspace. " \ 548 "Only used if UseLargePages is enabled.") \ 549 \ 550 develop(bool, TracePageSizes, false, \ 551 "Trace page size selection and usage") \ 552 \ 553 product(bool, UseNUMA, false, \ 554 "Use NUMA if available") \ 555 \ 556 product(bool, UseNUMAInterleaving, false, \ 557 "Interleave memory across NUMA nodes if available") \ 558 \ 559 product(uintx, NUMAInterleaveGranularity, 2*M, \ 560 "Granularity to use for NUMA interleaving on Windows OS") \ 561 \ 562 product(bool, ForceNUMA, false, \ 563 "Force NUMA optimizations on single-node/UMA systems") \ 564 \ 565 product(uintx, NUMAChunkResizeWeight, 20, \ 566 "Percentage (0-100) used to weigh the current sample when " \ 567 "computing exponentially decaying average for " \ 568 "AdaptiveNUMAChunkSizing") \ 569 \ 570 product(uintx, NUMASpaceResizeRate, 1*G, \ 571 "Do not reallocate more than this amount per collection") \ 572 \ 573 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 574 "Enable adaptive chunk sizing for NUMA") \ 575 \ 576 product(bool, NUMAStats, false, \ 577 "Print NUMA stats in detailed heap information") \ 578 \ 579 product(uintx, NUMAPageScanRate, 256, \ 580 "Maximum number of pages to include in the page scan procedure") \ 581 \ 582 product_pd(bool, NeedsDeoptSuspend, \ 583 "True for register window machines (sparc/ia64)") \ 584 \ 585 product(intx, UseSSE, 99, \ 586 "Highest supported SSE instructions set on x86/x64") \ 587 \ 588 product(bool, UseAES, false, \ 589 "Control whether AES instructions can be used on x86/x64") \ 590 \ 591 product(uintx, LargePageSizeInBytes, 0, \ 592 "Large page size (0 to let VM choose the page size)") \ 593 \ 594 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 595 "Use large pages if maximum heap is at least this big") \ 596 \ 597 product(bool, ForceTimeHighResolution, false, \ 598 "Using high time resolution (for Win32 only)") \ 599 \ 600 develop(bool, TraceItables, false, \ 601 "Trace initialization and use of itables") \ 602 \ 603 develop(bool, TracePcPatching, false, \ 604 "Trace usage of frame::patch_pc") \ 605 \ 606 develop(bool, TraceJumps, false, \ 607 "Trace assembly jumps in thread ring buffer") \ 608 \ 609 develop(bool, TraceRelocator, false, \ 610 "Trace the bytecode relocator") \ 611 \ 612 develop(bool, TraceLongCompiles, false, \ 613 "Print out every time compilation is longer than " \ 614 "a given threshold") \ 615 \ 616 develop(bool, SafepointALot, false, \ 617 "Generate a lot of safepoints. This works with " \ 618 "GuaranteedSafepointInterval") \ 619 \ 620 product_pd(bool, BackgroundCompilation, \ 621 "A thread requesting compilation is not blocked during " \ 622 "compilation") \ 623 \ 624 product(bool, PrintVMQWaitTime, false, \ 625 "Print out the waiting time in VM operation queue") \ 626 \ 627 develop(bool, NoYieldsInMicrolock, false, \ 628 "Disable yields in microlock") \ 629 \ 630 develop(bool, TraceOopMapGeneration, false, \ 631 "Show OopMapGeneration") \ 632 \ 633 product(bool, MethodFlushing, true, \ 634 "Reclamation of zombie and not-entrant methods") \ 635 \ 636 develop(bool, VerifyStack, false, \ 637 "Verify stack of each thread when it is entering a runtime call") \ 638 \ 639 diagnostic(bool, ForceUnreachable, false, \ 640 "Make all non code cache addresses to be unreachable by " \ 641 "forcing use of 64bit literal fixups") \ 642 \ 643 notproduct(bool, StressDerivedPointers, false, \ 644 "Force scavenge when a derived pointer is detected on stack " \ 645 "after rtm call") \ 646 \ 647 develop(bool, TraceDerivedPointers, false, \ 648 "Trace traversal of derived pointers on stack") \ 649 \ 650 notproduct(bool, TraceCodeBlobStacks, false, \ 651 "Trace stack-walk of codeblobs") \ 652 \ 653 product(bool, PrintJNIResolving, false, \ 654 "Used to implement -v:jni") \ 655 \ 656 notproduct(bool, PrintRewrites, false, \ 657 "Print methods that are being rewritten") \ 658 \ 659 product(bool, UseInlineCaches, true, \ 660 "Use Inline Caches for virtual calls ") \ 661 \ 662 develop(bool, InlineArrayCopy, true, \ 663 "Inline arraycopy native that is known to be part of " \ 664 "base library DLL") \ 665 \ 666 develop(bool, InlineObjectHash, true, \ 667 "Inline Object::hashCode() native that is known to be part " \ 668 "of base library DLL") \ 669 \ 670 develop(bool, InlineNatives, true, \ 671 "Inline natives that are known to be part of base library DLL") \ 672 \ 673 develop(bool, InlineMathNatives, true, \ 674 "Inline SinD, CosD, etc.") \ 675 \ 676 develop(bool, InlineClassNatives, true, \ 677 "Inline Class.isInstance, etc") \ 678 \ 679 develop(bool, InlineThreadNatives, true, \ 680 "Inline Thread.currentThread, etc") \ 681 \ 682 develop(bool, InlineUnsafeOps, true, \ 683 "Inline memory ops (native methods) from sun.misc.Unsafe") \ 684 \ 685 product(bool, CriticalJNINatives, true, \ 686 "Check for critical JNI entry points") \ 687 \ 688 notproduct(bool, StressCriticalJNINatives, false, \ 689 "Exercise register saving code in critical natives") \ 690 \ 691 product(bool, UseSSE42Intrinsics, false, \ 692 "SSE4.2 versions of intrinsics") \ 693 \ 694 product(bool, UseAESIntrinsics, false, \ 695 "Use intrinsics for AES versions of crypto") \ 696 \ 697 product(bool, UseCRC32Intrinsics, false, \ 698 "use intrinsics for java.util.zip.CRC32") \ 699 \ 700 develop(bool, TraceCallFixup, false, \ 701 "Trace all call fixups") \ 702 \ 703 develop(bool, DeoptimizeALot, false, \ 704 "Deoptimize at every exit from the runtime system") \ 705 \ 706 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 707 "A comma separated list of bcis to deoptimize at") \ 708 \ 709 product(bool, DeoptimizeRandom, false, \ 710 "Deoptimize random frames on random exit from the runtime system")\ 711 \ 712 notproduct(bool, ZombieALot, false, \ 713 "Create zombies (non-entrant) at exit from the runtime system") \ 714 \ 715 product(bool, UnlinkSymbolsALot, false, \ 716 "Unlink unreferenced symbols from the symbol table at safepoints")\ 717 \ 718 notproduct(bool, WalkStackALot, false, \ 719 "Trace stack (no print) at every exit from the runtime system") \ 720 \ 721 product(bool, Debugging, false, \ 722 "Set when executing debug methods in debug.cpp " \ 723 "(to prevent triggering assertions)") \ 724 \ 725 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 726 "Enable strict checks that safepoints cannot happen for threads " \ 727 "that use No_Safepoint_Verifier") \ 728 \ 729 notproduct(bool, VerifyLastFrame, false, \ 730 "Verify oops on last frame on entry to VM") \ 731 \ 732 develop(bool, TraceHandleAllocation, false, \ 733 "Print out warnings when suspiciously many handles are allocated")\ 734 \ 735 product(bool, UseCompilerSafepoints, true, \ 736 "Stop at safepoints in compiled code") \ 737 \ 738 product(bool, FailOverToOldVerifier, true, \ 739 "Fail over to old verifier when split verifier fails") \ 740 \ 741 develop(bool, ShowSafepointMsgs, false, \ 742 "Show message about safepoint synchronization") \ 743 \ 744 product(bool, SafepointTimeout, false, \ 745 "Time out and warn or fail after SafepointTimeoutDelay " \ 746 "milliseconds if failed to reach safepoint") \ 747 \ 748 develop(bool, DieOnSafepointTimeout, false, \ 749 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 750 \ 751 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 752 /* typically, at most a few retries are needed */ \ 753 product(intx, SuspendRetryCount, 50, \ 754 "Maximum retry count for an external suspend request") \ 755 \ 756 product(intx, SuspendRetryDelay, 5, \ 757 "Milliseconds to delay per retry (* current_retry_count)") \ 758 \ 759 product(bool, AssertOnSuspendWaitFailure, false, \ 760 "Assert/Guarantee on external suspend wait failure") \ 761 \ 762 product(bool, TraceSuspendWaitFailures, false, \ 763 "Trace external suspend wait failures") \ 764 \ 765 product(bool, MaxFDLimit, true, \ 766 "Bump the number of file descriptors to maximum in Solaris") \ 767 \ 768 diagnostic(bool, LogEvents, true, \ 769 "Enable the various ring buffer event logs") \ 770 \ 771 diagnostic(uintx, LogEventsBufferEntries, 10, \ 772 "Number of ring buffer event logs") \ 773 \ 774 product(bool, BytecodeVerificationRemote, true, \ 775 "Enable the Java bytecode verifier for remote classes") \ 776 \ 777 product(bool, BytecodeVerificationLocal, false, \ 778 "Enable the Java bytecode verifier for local classes") \ 779 \ 780 develop(bool, ForceFloatExceptions, trueInDebug, \ 781 "Force exceptions on FP stack under/overflow") \ 782 \ 783 develop(bool, VerifyStackAtCalls, false, \ 784 "Verify that the stack pointer is unchanged after calls") \ 785 \ 786 develop(bool, TraceJavaAssertions, false, \ 787 "Trace java language assertions") \ 788 \ 789 notproduct(bool, CheckAssertionStatusDirectives, false, \ 790 "Temporary - see javaClasses.cpp") \ 791 \ 792 notproduct(bool, PrintMallocFree, false, \ 793 "Trace calls to C heap malloc/free allocation") \ 794 \ 795 product(bool, PrintOopAddress, false, \ 796 "Always print the location of the oop") \ 797 \ 798 notproduct(bool, VerifyCodeCacheOften, false, \ 799 "Verify compiled-code cache often") \ 800 \ 801 develop(bool, ZapDeadCompiledLocals, false, \ 802 "Zap dead locals in compiler frames") \ 803 \ 804 notproduct(bool, ZapDeadLocalsOld, false, \ 805 "Zap dead locals (old version, zaps all frames when " \ 806 "entering the VM") \ 807 \ 808 notproduct(bool, CheckOopishValues, false, \ 809 "Warn if value contains oop (requires ZapDeadLocals)") \ 810 \ 811 develop(bool, UseMallocOnly, false, \ 812 "Use only malloc/free for allocation (no resource area/arena)") \ 813 \ 814 develop(bool, PrintMalloc, false, \ 815 "Print all malloc/free calls") \ 816 \ 817 develop(bool, PrintMallocStatistics, false, \ 818 "Print malloc/free statistics") \ 819 \ 820 develop(bool, ZapResourceArea, trueInDebug, \ 821 "Zap freed resource/arena space with 0xABABABAB") \ 822 \ 823 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 824 "Zap freed VM handle space with 0xBCBCBCBC") \ 825 \ 826 develop(bool, ZapJNIHandleArea, trueInDebug, \ 827 "Zap freed JNI handle space with 0xFEFEFEFE") \ 828 \ 829 notproduct(bool, ZapStackSegments, trueInDebug, \ 830 "Zap allocated/freed stack segments with 0xFADFADED") \ 831 \ 832 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 833 "Zap unused heap space with 0xBAADBABE") \ 834 \ 835 develop(bool, TraceZapUnusedHeapArea, false, \ 836 "Trace zapping of unused heap space") \ 837 \ 838 develop(bool, CheckZapUnusedHeapArea, false, \ 839 "Check zapping of unused heap space") \ 840 \ 841 develop(bool, ZapFillerObjects, trueInDebug, \ 842 "Zap filler objects with 0xDEAFBABE") \ 843 \ 844 develop(bool, PrintVMMessages, true, \ 845 "Print VM messages on console") \ 846 \ 847 product(bool, PrintGCApplicationConcurrentTime, false, \ 848 "Print the time the application has been running") \ 849 \ 850 product(bool, PrintGCApplicationStoppedTime, false, \ 851 "Print the time the application has been stopped") \ 852 \ 853 diagnostic(bool, VerboseVerification, false, \ 854 "Display detailed verification details") \ 855 \ 856 notproduct(uintx, ErrorHandlerTest, 0, \ 857 "If > 0, provokes an error after VM initialization; the value " \ 858 "determines which error to provoke. See test_error_handler() " \ 859 "in debug.cpp.") \ 860 \ 861 develop(bool, Verbose, false, \ 862 "Print additional debugging information from other modes") \ 863 \ 864 develop(bool, PrintMiscellaneous, false, \ 865 "Print uncategorized debugging information (requires +Verbose)") \ 866 \ 867 develop(bool, WizardMode, false, \ 868 "Print much more debugging information") \ 869 \ 870 product(bool, ShowMessageBoxOnError, false, \ 871 "Keep process alive on VM fatal error") \ 872 \ 873 product(bool, CreateMinidumpOnCrash, false, \ 874 "Create minidump on VM fatal error") \ 875 \ 876 product_pd(bool, UseOSErrorReporting, \ 877 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 878 \ 879 product(bool, SuppressFatalErrorMessage, false, \ 880 "Report NO fatal error message (avoid deadlock)") \ 881 \ 882 product(ccstrlist, OnError, "", \ 883 "Run user-defined commands on fatal error; see VMError.cpp " \ 884 "for examples") \ 885 \ 886 product(ccstrlist, OnOutOfMemoryError, "", \ 887 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 888 \ 889 manageable(bool, HeapDumpBeforeFullGC, false, \ 890 "Dump heap to file before any major stop-the-world GC") \ 891 \ 892 manageable(bool, HeapDumpAfterFullGC, false, \ 893 "Dump heap to file after any major stop-the-world GC") \ 894 \ 895 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 896 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 897 \ 898 manageable(ccstr, HeapDumpPath, NULL, \ 899 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 900 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 901 "in the working directory)") \ 902 \ 903 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 904 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 905 "when the heap usage is larger than this") \ 906 \ 907 develop(uintx, HeapDumpSegmentSize, 1*G, \ 908 "Approximate segment size when generating a segmented heap dump") \ 909 \ 910 develop(bool, BreakAtWarning, false, \ 911 "Execute breakpoint upon encountering VM warning") \ 912 \ 913 develop(bool, TraceVMOperation, false, \ 914 "Trace VM operations") \ 915 \ 916 develop(bool, UseFakeTimers, false, \ 917 "Tell whether the VM should use system time or a fake timer") \ 918 \ 919 product(ccstr, NativeMemoryTracking, "off", \ 920 "Native memory tracking options") \ 921 \ 922 diagnostic(bool, PrintNMTStatistics, false, \ 923 "Print native memory tracking summary data if it is on") \ 924 \ 925 diagnostic(bool, AutoShutdownNMT, true, \ 926 "Automatically shutdown native memory tracking under stress " \ 927 "situations. When set to false, native memory tracking tries to " \ 928 "stay alive at the expense of JVM performance") \ 929 \ 930 diagnostic(bool, LogCompilation, false, \ 931 "Log compilation activity in detail to LogFile") \ 932 \ 933 product(bool, PrintCompilation, false, \ 934 "Print compilations") \ 935 \ 936 diagnostic(bool, TraceNMethodInstalls, false, \ 937 "Trace nmethod installation") \ 938 \ 939 diagnostic(intx, ScavengeRootsInCode, 2, \ 940 "0: do not allow scavengable oops in the code cache; " \ 941 "1: allow scavenging from the code cache; " \ 942 "2: emit as many constants as the compiler can see") \ 943 \ 944 product(bool, AlwaysRestoreFPU, false, \ 945 "Restore the FPU control word after every JNI call (expensive)") \ 946 \ 947 diagnostic(bool, PrintCompilation2, false, \ 948 "Print additional statistics per compilation") \ 949 \ 950 diagnostic(bool, PrintAdapterHandlers, false, \ 951 "Print code generated for i2c/c2i adapters") \ 952 \ 953 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 954 "Verify that i2c/c2i adapters are called properly") \ 955 \ 956 develop(bool, VerifyAdapterSharing, false, \ 957 "Verify that the code for shared adapters is the equivalent") \ 958 \ 959 diagnostic(bool, PrintAssembly, false, \ 960 "Print assembly code (using external disassembler.so)") \ 961 \ 962 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 963 "Print options string passed to disassembler.so") \ 964 \ 965 diagnostic(bool, PrintNMethods, false, \ 966 "Print assembly code for nmethods when generated") \ 967 \ 968 diagnostic(bool, PrintNativeNMethods, false, \ 969 "Print assembly code for native nmethods when generated") \ 970 \ 971 develop(bool, PrintDebugInfo, false, \ 972 "Print debug information for all nmethods when generated") \ 973 \ 974 develop(bool, PrintRelocations, false, \ 975 "Print relocation information for all nmethods when generated") \ 976 \ 977 develop(bool, PrintDependencies, false, \ 978 "Print dependency information for all nmethods when generated") \ 979 \ 980 develop(bool, PrintExceptionHandlers, false, \ 981 "Print exception handler tables for all nmethods when generated") \ 982 \ 983 develop(bool, StressCompiledExceptionHandlers, false, \ 984 "Exercise compiled exception handlers") \ 985 \ 986 develop(bool, InterceptOSException, false, \ 987 "Start debugger when an implicit OS (e.g. NULL) " \ 988 "exception happens") \ 989 \ 990 product(bool, PrintCodeCache, false, \ 991 "Print the code cache memory usage when exiting") \ 992 \ 993 develop(bool, PrintCodeCache2, false, \ 994 "Print detailed usage information on the code cache when exiting")\ 995 \ 996 product(bool, PrintCodeCacheOnCompilation, false, \ 997 "Print the code cache memory usage each time a method is " \ 998 "compiled") \ 999 \ 1000 diagnostic(bool, PrintStubCode, false, \ 1001 "Print generated stub code") \ 1002 \ 1003 product(bool, StackTraceInThrowable, true, \ 1004 "Collect backtrace in throwable when exception happens") \ 1005 \ 1006 product(bool, OmitStackTraceInFastThrow, true, \ 1007 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1008 \ 1009 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1010 "Print bytecode statistics when dumping profiler output") \ 1011 \ 1012 product(bool, ProfilerRecordPC, false, \ 1013 "Collect ticks for each 16 byte interval of compiled code") \ 1014 \ 1015 product(bool, ProfileVM, false, \ 1016 "Profile ticks that fall within VM (either in the VM Thread " \ 1017 "or VM code called through stubs)") \ 1018 \ 1019 product(bool, ProfileIntervals, false, \ 1020 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1021 \ 1022 notproduct(bool, ProfilerCheckIntervals, false, \ 1023 "Collect and print information on spacing of profiler ticks") \ 1024 \ 1025 develop(bool, PrintJVMWarnings, false, \ 1026 "Print warnings for unimplemented JVM functions") \ 1027 \ 1028 product(bool, PrintWarnings, true, \ 1029 "Print JVM warnings to output stream") \ 1030 \ 1031 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1032 "Print warnings for stalled SpinLocks") \ 1033 \ 1034 product(bool, RegisterFinalizersAtInit, true, \ 1035 "Register finalizable objects at end of Object.<init> or " \ 1036 "after allocation") \ 1037 \ 1038 develop(bool, RegisterReferences, true, \ 1039 "Tell whether the VM should register soft/weak/final/phantom " \ 1040 "references") \ 1041 \ 1042 develop(bool, IgnoreRewrites, false, \ 1043 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1044 "This is unsafe!") \ 1045 \ 1046 develop(bool, PrintCodeCacheExtension, false, \ 1047 "Print extension of code cache") \ 1048 \ 1049 develop(bool, UsePrivilegedStack, true, \ 1050 "Enable the security JVM functions") \ 1051 \ 1052 develop(bool, ProtectionDomainVerification, true, \ 1053 "Verify protection domain before resolution in system dictionary")\ 1054 \ 1055 product(bool, ClassUnloading, true, \ 1056 "Do unloading of classes") \ 1057 \ 1058 develop(bool, DisableStartThread, false, \ 1059 "Disable starting of additional Java threads " \ 1060 "(for debugging only)") \ 1061 \ 1062 develop(bool, MemProfiling, false, \ 1063 "Write memory usage profiling to log file") \ 1064 \ 1065 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1066 "Print the system dictionary at exit") \ 1067 \ 1068 experimental(intx, PredictedLoadedClassCount, 0, \ 1069 "Experimental: Tune loaded class cache starting size") \ 1070 \ 1071 diagnostic(bool, UnsyncloadClass, false, \ 1072 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1073 "class loader must call VM synchronized for findClass " \ 1074 "and defineClass.") \ 1075 \ 1076 product(bool, AlwaysLockClassLoader, false, \ 1077 "Require the VM to acquire the class loader lock before calling " \ 1078 "loadClass() even for class loaders registering " \ 1079 "as parallel capable") \ 1080 \ 1081 product(bool, AllowParallelDefineClass, false, \ 1082 "Allow parallel defineClass requests for class loaders " \ 1083 "registering as parallel capable") \ 1084 \ 1085 product(bool, MustCallLoadClassInternal, false, \ 1086 "Call loadClassInternal() rather than loadClass()") \ 1087 \ 1088 product_pd(bool, DontYieldALot, \ 1089 "Throw away obvious excess yield calls (for Solaris only)") \ 1090 \ 1091 product_pd(bool, ConvertSleepToYield, \ 1092 "Convert sleep(0) to thread yield " \ 1093 "(may be off for Solaris to improve GUI)") \ 1094 \ 1095 product(bool, ConvertYieldToSleep, false, \ 1096 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1097 "behavior (Solaris only)") \ 1098 \ 1099 product(bool, UseBoundThreads, true, \ 1100 "Bind user level threads to kernel threads (for Solaris only)") \ 1101 \ 1102 develop(bool, UseDetachedThreads, true, \ 1103 "Use detached threads that are recycled upon termination " \ 1104 "(for Solaris only)") \ 1105 \ 1106 product(bool, UseLWPSynchronization, true, \ 1107 "Use LWP-based instead of libthread-based synchronization " \ 1108 "(SPARC only)") \ 1109 \ 1110 product(ccstr, SyncKnobs, NULL, \ 1111 "(Unstable) Various monitor synchronization tunables") \ 1112 \ 1113 product(intx, EmitSync, 0, \ 1114 "(Unsafe, Unstable) " \ 1115 "Control emission of inline sync fast-path code") \ 1116 \ 1117 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1118 \ 1119 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1120 \ 1121 product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \ 1122 \ 1123 product(intx, SyncVerbose, 0, "(Unstable)") \ 1124 \ 1125 product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1126 \ 1127 product(intx, hashCode, 5, \ 1128 "(Unstable) select hashCode generation algorithm") \ 1129 \ 1130 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1131 "(Unstable, Linux-specific) " \ 1132 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1133 \ 1134 product(bool, FilterSpuriousWakeups, true, \ 1135 "Prevent spurious or premature wakeups from object.wait " \ 1136 "(Solaris only)") \ 1137 \ 1138 product(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1139 \ 1140 product(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1141 \ 1142 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1143 \ 1144 develop(bool, UsePthreads, false, \ 1145 "Use pthread-based instead of libthread-based synchronization " \ 1146 "(SPARC only)") \ 1147 \ 1148 product(bool, AdjustConcurrency, false, \ 1149 "Call thr_setconcurrency at thread creation time to avoid " \ 1150 "LWP starvation on MP systems (for Solaris Only)") \ 1151 \ 1152 product(bool, ReduceSignalUsage, false, \ 1153 "Reduce the use of OS signals in Java and/or the VM") \ 1154 \ 1155 develop_pd(bool, ShareVtableStubs, \ 1156 "Share vtable stubs (smaller code but worse branch prediction") \ 1157 \ 1158 develop(bool, LoadLineNumberTables, true, \ 1159 "Tell whether the class file parser loads line number tables") \ 1160 \ 1161 develop(bool, LoadLocalVariableTables, true, \ 1162 "Tell whether the class file parser loads local variable tables") \ 1163 \ 1164 develop(bool, LoadLocalVariableTypeTables, true, \ 1165 "Tell whether the class file parser loads local variable type" \ 1166 "tables") \ 1167 \ 1168 product(bool, AllowUserSignalHandlers, false, \ 1169 "Do not complain if the application installs signal handlers " \ 1170 "(Solaris & Linux only)") \ 1171 \ 1172 product(bool, UseSignalChaining, true, \ 1173 "Use signal-chaining to invoke signal handlers installed " \ 1174 "by the application (Solaris & Linux only)") \ 1175 \ 1176 product(bool, UseAltSigs, false, \ 1177 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1178 "internal signals (Solaris only)") \ 1179 \ 1180 product(bool, AllowJNIEnvProxy, false, \ 1181 "Allow JNIEnv proxies for jdbx") \ 1182 \ 1183 product(bool, JNIDetachReleasesMonitors, true, \ 1184 "JNI DetachCurrentThread releases monitors owned by thread") \ 1185 \ 1186 product(bool, RestoreMXCSROnJNICalls, false, \ 1187 "Restore MXCSR when returning from JNI calls") \ 1188 \ 1189 product(bool, CheckJNICalls, false, \ 1190 "Verify all arguments to JNI calls") \ 1191 \ 1192 product(bool, UseFastJNIAccessors, true, \ 1193 "Use optimized versions of Get<Primitive>Field") \ 1194 \ 1195 product(bool, EagerXrunInit, false, \ 1196 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1197 "but not all -Xrun libraries may support the state of the VM " \ 1198 "at this time") \ 1199 \ 1200 product(bool, PreserveAllAnnotations, false, \ 1201 "Preserve RuntimeInvisibleAnnotations as well " \ 1202 "as RuntimeVisibleAnnotations") \ 1203 \ 1204 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1205 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1206 \ 1207 product(bool, LazyBootClassLoader, true, \ 1208 "Enable/disable lazy opening of boot class path entries") \ 1209 \ 1210 product(bool, UseXMMForArrayCopy, false, \ 1211 "Use SSE2 MOVQ instruction for Arraycopy") \ 1212 \ 1213 product(intx, FieldsAllocationStyle, 1, \ 1214 "0 - type based with oops first, 1 - with oops last, " \ 1215 "2 - oops in super and sub classes are together") \ 1216 \ 1217 product(bool, CompactFields, true, \ 1218 "Allocate nonstatic fields in gaps between previous fields") \ 1219 \ 1220 notproduct(bool, PrintFieldLayout, false, \ 1221 "Print field layout for each class") \ 1222 \ 1223 product(intx, ContendedPaddingWidth, 128, \ 1224 "How many bytes to pad the fields/classes marked @Contended with")\ 1225 \ 1226 product(bool, EnableContended, true, \ 1227 "Enable @Contended annotation support") \ 1228 \ 1229 product(bool, RestrictContended, true, \ 1230 "Restrict @Contended to trusted classes") \ 1231 \ 1232 product(bool, UseBiasedLocking, true, \ 1233 "Enable biased locking in JVM") \ 1234 \ 1235 product(intx, BiasedLockingStartupDelay, 4000, \ 1236 "Number of milliseconds to wait before enabling biased locking") \ 1237 \ 1238 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1239 "Print statistics of biased locking in JVM") \ 1240 \ 1241 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1242 "Threshold of number of revocations per type to try to " \ 1243 "rebias all objects in the heap of that type") \ 1244 \ 1245 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1246 "Threshold of number of revocations per type to permanently " \ 1247 "revoke biases of all objects in the heap of that type") \ 1248 \ 1249 product(intx, BiasedLockingDecayTime, 25000, \ 1250 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1251 "type after previous bulk rebias") \ 1252 \ 1253 /* tracing */ \ 1254 \ 1255 notproduct(bool, TraceRuntimeCalls, false, \ 1256 "Trace run-time calls") \ 1257 \ 1258 develop(bool, TraceJNICalls, false, \ 1259 "Trace JNI calls") \ 1260 \ 1261 notproduct(bool, TraceJVMCalls, false, \ 1262 "Trace JVM calls") \ 1263 \ 1264 product(ccstr, TraceJVMTI, NULL, \ 1265 "Trace flags for JVMTI functions and events") \ 1266 \ 1267 /* This option can change an EMCP method into an obsolete method. */ \ 1268 /* This can affect tests that except specific methods to be EMCP. */ \ 1269 /* This option should be used with caution. */ \ 1270 product(bool, StressLdcRewrite, false, \ 1271 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1272 \ 1273 product(intx, TraceRedefineClasses, 0, \ 1274 "Trace level for JVMTI RedefineClasses") \ 1275 \ 1276 develop(bool, StressMethodComparator, false, \ 1277 "Run the MethodComparator on all loaded methods") \ 1278 \ 1279 /* change to false by default sometime after Mustang */ \ 1280 product(bool, VerifyMergedCPBytecodes, true, \ 1281 "Verify bytecodes after RedefineClasses constant pool merging") \ 1282 \ 1283 develop(bool, TraceJNIHandleAllocation, false, \ 1284 "Trace allocation/deallocation of JNI handle blocks") \ 1285 \ 1286 develop(bool, TraceThreadEvents, false, \ 1287 "Trace all thread events") \ 1288 \ 1289 develop(bool, TraceBytecodes, false, \ 1290 "Trace bytecode execution") \ 1291 \ 1292 develop(bool, TraceClassInitialization, false, \ 1293 "Trace class initialization") \ 1294 \ 1295 develop(bool, TraceExceptions, false, \ 1296 "Trace exceptions") \ 1297 \ 1298 develop(bool, TraceICs, false, \ 1299 "Trace inline cache changes") \ 1300 \ 1301 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1302 "Trace method invocation counter overflow") \ 1303 \ 1304 develop(bool, TraceInlineCacheClearing, false, \ 1305 "Trace clearing of inline caches in nmethods") \ 1306 \ 1307 develop(bool, TraceDependencies, false, \ 1308 "Trace dependencies") \ 1309 \ 1310 develop(bool, VerifyDependencies, trueInDebug, \ 1311 "Exercise and verify the compilation dependency mechanism") \ 1312 \ 1313 develop(bool, TraceNewOopMapGeneration, false, \ 1314 "Trace OopMapGeneration") \ 1315 \ 1316 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1317 "Trace OopMapGeneration: print detailed cell states") \ 1318 \ 1319 develop(bool, TimeOopMap, false, \ 1320 "Time calls to GenerateOopMap::compute_map() in sum") \ 1321 \ 1322 develop(bool, TimeOopMap2, false, \ 1323 "Time calls to GenerateOopMap::compute_map() individually") \ 1324 \ 1325 develop(bool, TraceMonitorMismatch, false, \ 1326 "Trace monitor matching failures during OopMapGeneration") \ 1327 \ 1328 develop(bool, TraceOopMapRewrites, false, \ 1329 "Trace rewriting of method oops during oop map generation") \ 1330 \ 1331 develop(bool, TraceSafepoint, false, \ 1332 "Trace safepoint operations") \ 1333 \ 1334 develop(bool, TraceICBuffer, false, \ 1335 "Trace usage of IC buffer") \ 1336 \ 1337 develop(bool, TraceCompiledIC, false, \ 1338 "Trace changes of compiled IC") \ 1339 \ 1340 notproduct(bool, TraceZapDeadLocals, false, \ 1341 "Trace zapping dead locals") \ 1342 \ 1343 develop(bool, TraceStartupTime, false, \ 1344 "Trace setup time") \ 1345 \ 1346 develop(bool, TraceProtectionDomainVerification, false, \ 1347 "Trace protection domain verification") \ 1348 \ 1349 develop(bool, TraceClearedExceptions, false, \ 1350 "Print when an exception is forcibly cleared") \ 1351 \ 1352 product(bool, TraceClassResolution, false, \ 1353 "Trace all constant pool resolutions (for debugging)") \ 1354 \ 1355 product(bool, TraceBiasedLocking, false, \ 1356 "Trace biased locking in JVM") \ 1357 \ 1358 product(bool, TraceMonitorInflation, false, \ 1359 "Trace monitor inflation in JVM") \ 1360 \ 1361 /* gc */ \ 1362 \ 1363 product(bool, UseSerialGC, false, \ 1364 "Use the Serial garbage collector") \ 1365 \ 1366 product(bool, UseG1GC, false, \ 1367 "Use the Garbage-First garbage collector") \ 1368 \ 1369 product(bool, UseParallelGC, false, \ 1370 "Use the Parallel Scavenge garbage collector") \ 1371 \ 1372 product(bool, UseParallelOldGC, false, \ 1373 "Use the Parallel Old garbage collector") \ 1374 \ 1375 product(uintx, HeapMaximumCompactionInterval, 20, \ 1376 "How often should we maximally compact the heap (not allowing " \ 1377 "any dead space)") \ 1378 \ 1379 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1380 "The collection count for the first maximum compaction") \ 1381 \ 1382 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1383 "Use maximum compaction in the Parallel Old garbage collector " \ 1384 "for a system GC") \ 1385 \ 1386 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1387 "The mean used by the parallel compact dead wood " \ 1388 "limiter (a number between 0-100)") \ 1389 \ 1390 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1391 "The standard deviation used by the parallel compact dead wood " \ 1392 "limiter (a number between 0-100)") \ 1393 \ 1394 product(uintx, ParallelGCThreads, 0, \ 1395 "Number of parallel threads parallel gc will use") \ 1396 \ 1397 product(bool, UseDynamicNumberOfGCThreads, false, \ 1398 "Dynamically choose the number of parallel threads " \ 1399 "parallel gc will use") \ 1400 \ 1401 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1402 "Force dynamic selection of the number of " \ 1403 "parallel threads parallel gc will use to aid debugging") \ 1404 \ 1405 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1406 "Size of heap (bytes) per GC thread used in calculating the " \ 1407 "number of GC threads") \ 1408 \ 1409 product(bool, TraceDynamicGCThreads, false, \ 1410 "Trace the dynamic GC thread usage") \ 1411 \ 1412 develop(bool, ParallelOldGCSplitALot, false, \ 1413 "Provoke splitting (copying data from a young gen space to " \ 1414 "multiple destination spaces)") \ 1415 \ 1416 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1417 "How often to provoke splitting a young gen space") \ 1418 \ 1419 product(uintx, ConcGCThreads, 0, \ 1420 "Number of threads concurrent gc will use") \ 1421 \ 1422 product(uintx, YoungPLABSize, 4096, \ 1423 "Size of young gen promotion LAB's (in HeapWords)") \ 1424 \ 1425 product(uintx, OldPLABSize, 1024, \ 1426 "Size of old gen promotion LAB's (in HeapWords)") \ 1427 \ 1428 product(uintx, GCTaskTimeStampEntries, 200, \ 1429 "Number of time stamp entries per gc worker thread") \ 1430 \ 1431 product(bool, AlwaysTenure, false, \ 1432 "Always tenure objects in eden (ParallelGC only)") \ 1433 \ 1434 product(bool, NeverTenure, false, \ 1435 "Never tenure objects in eden, may tenure on overflow " \ 1436 "(ParallelGC only)") \ 1437 \ 1438 product(bool, ScavengeBeforeFullGC, true, \ 1439 "Scavenge youngest generation before each full GC, " \ 1440 "used with UseParallelGC") \ 1441 \ 1442 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1443 "Allow scavenges to occur when to-space contains objects") \ 1444 \ 1445 product(bool, UseConcMarkSweepGC, false, \ 1446 "Use Concurrent Mark-Sweep GC in the old generation") \ 1447 \ 1448 product(bool, ExplicitGCInvokesConcurrent, false, \ 1449 "A System.gc() request invokes a concurrent collection; " \ 1450 "(effective only when UseConcMarkSweepGC)") \ 1451 \ 1452 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1453 "A System.gc() request invokes a concurrent collection and " \ 1454 "also unloads classes during such a concurrent gc cycle " \ 1455 "(effective only when UseConcMarkSweepGC)") \ 1456 \ 1457 product(bool, GCLockerInvokesConcurrent, false, \ 1458 "The exit of a JNI critical section necessitating a scavenge, " \ 1459 "also kicks off a background concurrent collection") \ 1460 \ 1461 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1462 "How much the GC can expand the eden by while the GC locker " \ 1463 "is active (as a percentage)") \ 1464 \ 1465 diagnostic(intx, GCLockerRetryAllocationCount, 2, \ 1466 "Number of times to retry allocations when " \ 1467 "blocked by the GC locker") \ 1468 \ 1469 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1470 "Use adaptive free lists in the CMS generation") \ 1471 \ 1472 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1473 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1474 \ 1475 develop(bool, RotateCMSCollectionTypes, false, \ 1476 "Rotate the CMS collections among concurrent and STW") \ 1477 \ 1478 product(bool, UseCMSBestFit, true, \ 1479 "Use CMS best fit allocation strategy") \ 1480 \ 1481 product(bool, UseCMSCollectionPassing, true, \ 1482 "Use passing of collection from background to foreground") \ 1483 \ 1484 product(bool, UseParNewGC, false, \ 1485 "Use parallel threads in the new generation") \ 1486 \ 1487 product(bool, ParallelGCVerbose, false, \ 1488 "Verbose output for parallel gc") \ 1489 \ 1490 product(uintx, ParallelGCBufferWastePct, 10, \ 1491 "Wasted fraction of parallel allocation buffer") \ 1492 \ 1493 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1494 "Retain parallel allocation buffers across scavenges; " \ 1495 "it is disabled because this currently conflicts with " \ 1496 "parallel card scanning under certain conditions.") \ 1497 \ 1498 product(uintx, TargetPLABWastePct, 10, \ 1499 "Target wasted space in last buffer as percent of overall " \ 1500 "allocation") \ 1501 \ 1502 product(uintx, PLABWeight, 75, \ 1503 "Percentage (0-100) used to weigh the current sample when " \ 1504 "computing exponentially decaying average for ResizePLAB") \ 1505 \ 1506 product(bool, ResizePLAB, true, \ 1507 "Dynamically resize (survivor space) promotion LAB's") \ 1508 \ 1509 product(bool, PrintPLAB, false, \ 1510 "Print (survivor space) promotion LAB's sizing decisions") \ 1511 \ 1512 product(intx, ParGCArrayScanChunk, 50, \ 1513 "Scan a subset of object array and push remainder, if array is " \ 1514 "bigger than this") \ 1515 \ 1516 product(bool, ParGCUseLocalOverflow, false, \ 1517 "Instead of a global overflow list, use local overflow stacks") \ 1518 \ 1519 product(bool, ParGCTrimOverflow, true, \ 1520 "Eagerly trim the local overflow lists " \ 1521 "(when ParGCUseLocalOverflow)") \ 1522 \ 1523 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1524 "Simulate work queue overflow in ParNew") \ 1525 \ 1526 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1527 "An `interval' counter that determines how frequently " \ 1528 "we simulate overflow; a smaller number increases frequency") \ 1529 \ 1530 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1531 "The desired number of objects to claim from the overflow list") \ 1532 \ 1533 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1534 "The number of strides per worker thread that we divide up the " \ 1535 "card table scanning work into") \ 1536 \ 1537 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1538 "The number of cards in each chunk of the parallel chunks used " \ 1539 "during card table scanning") \ 1540 \ 1541 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1542 "Number of blocks to attempt to claim when refilling CMS LAB's " \ 1543 "for parallel GC") \ 1544 \ 1545 product(uintx, OldPLABWeight, 50, \ 1546 "Percentage (0-100) used to weight the current sample when " \ 1547 "computing exponentially decaying average for resizing " \ 1548 "CMSParPromoteBlocksToClaim") \ 1549 \ 1550 product(bool, ResizeOldPLAB, true, \ 1551 "Dynamically resize (old gen) promotion LAB's") \ 1552 \ 1553 product(bool, PrintOldPLAB, false, \ 1554 "Print (old gen) promotion LAB's sizing decisions") \ 1555 \ 1556 product(uintx, CMSOldPLABMin, 16, \ 1557 "Minimum size of CMS gen promotion LAB caches per worker " \ 1558 "per block size") \ 1559 \ 1560 product(uintx, CMSOldPLABMax, 1024, \ 1561 "Maximum size of CMS gen promotion LAB caches per worker " \ 1562 "per block size") \ 1563 \ 1564 product(uintx, CMSOldPLABNumRefills, 4, \ 1565 "Nominal number of refills of CMS gen promotion LAB cache " \ 1566 "per worker per block size") \ 1567 \ 1568 product(bool, CMSOldPLABResizeQuicker, false, \ 1569 "React on-the-fly during a scavenge to a sudden " \ 1570 "change in block demand rate") \ 1571 \ 1572 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1573 "The tolerance of the phase-change detector for on-the-fly " \ 1574 "PLAB resizing during a scavenge") \ 1575 \ 1576 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1577 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1578 "during a scavenge") \ 1579 \ 1580 product(bool, AlwaysPreTouch, false, \ 1581 "Force all freshly committed pages to be pre-touched") \ 1582 \ 1583 product_pd(uintx, CMSYoungGenPerWorker, \ 1584 "The maximum size of young gen chosen by default per GC worker " \ 1585 "thread available") \ 1586 \ 1587 product(bool, CMSIncrementalMode, false, \ 1588 "Whether CMS GC should operate in \"incremental\" mode") \ 1589 \ 1590 product(uintx, CMSIncrementalDutyCycle, 10, \ 1591 "Percentage (0-100) of CMS incremental mode duty cycle. If " \ 1592 "CMSIncrementalPacing is enabled, then this is just the initial " \ 1593 "value.") \ 1594 \ 1595 product(bool, CMSIncrementalPacing, true, \ 1596 "Whether the CMS incremental mode duty cycle should be " \ 1597 "automatically adjusted") \ 1598 \ 1599 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1600 "Minimum percentage (0-100) of the CMS incremental duty cycle " \ 1601 "used when CMSIncrementalPacing is enabled") \ 1602 \ 1603 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1604 "Percentage (0-100) used to add conservatism when computing the " \ 1605 "duty cycle") \ 1606 \ 1607 product(uintx, CMSIncrementalOffset, 0, \ 1608 "Percentage (0-100) by which the CMS incremental mode duty cycle "\ 1609 "is shifted to the right within the period between young GCs") \ 1610 \ 1611 product(uintx, CMSExpAvgFactor, 50, \ 1612 "Percentage (0-100) used to weigh the current sample when " \ 1613 "computing exponential averages for CMS statistics") \ 1614 \ 1615 product(uintx, CMS_FLSWeight, 75, \ 1616 "Percentage (0-100) used to weigh the current sample when " \ 1617 "computing exponentially decaying averages for CMS FLS " \ 1618 "statistics") \ 1619 \ 1620 product(uintx, CMS_FLSPadding, 1, \ 1621 "The multiple of deviation from mean to use for buffering " \ 1622 "against volatility in free list demand") \ 1623 \ 1624 product(uintx, FLSCoalescePolicy, 2, \ 1625 "CMS: aggressiveness level for coalescing, increasing " \ 1626 "from 0 to 4") \ 1627 \ 1628 product(bool, FLSAlwaysCoalesceLarge, false, \ 1629 "CMS: larger free blocks are always available for coalescing") \ 1630 \ 1631 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1632 "CMS: the smaller the percentage the greater the coalescing " \ 1633 "force") \ 1634 \ 1635 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1636 "CMS: the factor by which to inflate estimated demand of small " \ 1637 "block sizes to prevent coalescing with an adjoining block") \ 1638 \ 1639 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1640 "CMS: the factor by which to inflate estimated demand of large " \ 1641 "block sizes to prevent coalescing with an adjoining block") \ 1642 \ 1643 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1644 "CMS: the factor by which to inflate estimated demand of small " \ 1645 "block sizes to prevent splitting to supply demand for smaller " \ 1646 "blocks") \ 1647 \ 1648 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1649 "CMS: the factor by which to inflate estimated demand of large " \ 1650 "block sizes to prevent splitting to supply demand for smaller " \ 1651 "blocks") \ 1652 \ 1653 product(bool, CMSExtrapolateSweep, false, \ 1654 "CMS: cushion for block demand during sweep") \ 1655 \ 1656 product(uintx, CMS_SweepWeight, 75, \ 1657 "Percentage (0-100) used to weight the current sample when " \ 1658 "computing exponentially decaying average for inter-sweep " \ 1659 "duration") \ 1660 \ 1661 product(uintx, CMS_SweepPadding, 1, \ 1662 "The multiple of deviation from mean to use for buffering " \ 1663 "against volatility in inter-sweep duration") \ 1664 \ 1665 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1666 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1667 "duration exceeds this threshold in milliseconds") \ 1668 \ 1669 develop(bool, CMSTraceIncrementalMode, false, \ 1670 "Trace CMS incremental mode") \ 1671 \ 1672 develop(bool, CMSTraceIncrementalPacing, false, \ 1673 "Trace CMS incremental mode pacing computation") \ 1674 \ 1675 develop(bool, CMSTraceThreadState, false, \ 1676 "Trace the CMS thread state (enable the trace_state() method)") \ 1677 \ 1678 product(bool, CMSClassUnloadingEnabled, true, \ 1679 "Whether class unloading enabled when using CMS GC") \ 1680 \ 1681 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1682 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1683 "count for which classes may not be unloaded") \ 1684 \ 1685 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1686 "Compact when asked to collect CMS gen with " \ 1687 "clear_all_soft_refs()") \ 1688 \ 1689 product(bool, UseCMSCompactAtFullCollection, true, \ 1690 "Use Mark-Sweep-Compact algorithm at full collections") \ 1691 \ 1692 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1693 "Number of CMS full collection done before compaction if > 0") \ 1694 \ 1695 develop(intx, CMSDictionaryChoice, 0, \ 1696 "Use BinaryTreeDictionary as default in the CMS generation") \ 1697 \ 1698 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1699 "Replenish an indexed free list with this number of chunks") \ 1700 \ 1701 product(bool, CMSReplenishIntermediate, true, \ 1702 "Replenish all intermediate free-list caches") \ 1703 \ 1704 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1705 "When satisfying batched demand, split blocks from the " \ 1706 "IndexedFreeList whose size is a multiple of requested size") \ 1707 \ 1708 product(bool, CMSLoopWarn, false, \ 1709 "Warn in case of excessive CMS looping") \ 1710 \ 1711 develop(bool, CMSOverflowEarlyRestoration, false, \ 1712 "Restore preserved marks early") \ 1713 \ 1714 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1715 "Size of marking stack") \ 1716 \ 1717 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1718 "Maximum size of marking stack") \ 1719 \ 1720 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1721 "Simulate frequent marking stack / work queue overflow") \ 1722 \ 1723 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1724 "An \"interval\" counter that determines how frequently " \ 1725 "to simulate overflow; a smaller number increases frequency") \ 1726 \ 1727 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1728 "(Temporary, subject to experimentation) " \ 1729 "Maximum number of abortable preclean iterations, if > 0") \ 1730 \ 1731 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1732 "(Temporary, subject to experimentation) " \ 1733 "Maximum time in abortable preclean (in milliseconds)") \ 1734 \ 1735 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1736 "(Temporary, subject to experimentation) " \ 1737 "Nominal minimum work per abortable preclean iteration") \ 1738 \ 1739 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1740 "(Temporary, subject to experimentation) " \ 1741 "Time that we sleep between iterations when not given " \ 1742 "enough work per iteration") \ 1743 \ 1744 product(uintx, CMSRescanMultiple, 32, \ 1745 "Size (in cards) of CMS parallel rescan task") \ 1746 \ 1747 product(uintx, CMSConcMarkMultiple, 32, \ 1748 "Size (in cards) of CMS concurrent MT marking task") \ 1749 \ 1750 product(bool, CMSAbortSemantics, false, \ 1751 "Whether abort-on-overflow semantics is implemented") \ 1752 \ 1753 product(bool, CMSParallelInitialMarkEnabled, true, \ 1754 "Use the parallel initial mark.") \ 1755 \ 1756 product(bool, CMSParallelRemarkEnabled, true, \ 1757 "Whether parallel remark enabled (only if ParNewGC)") \ 1758 \ 1759 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1760 "Whether parallel remark of survivor space " \ 1761 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1762 \ 1763 product(bool, CMSPLABRecordAlways, true, \ 1764 "Always record survivor space PLAB boundaries (effective only " \ 1765 "if CMSParallelSurvivorRemarkEnabled)") \ 1766 \ 1767 product(bool, CMSEdenChunksRecordAlways, true, \ 1768 "Always record eden chunks used for the parallel initial mark " \ 1769 "or remark of eden") \ 1770 \ 1771 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1772 "Print the eden and the survivor chunks used for the parallel " \ 1773 "initial mark or remark of the eden/survivor spaces") \ 1774 \ 1775 product(bool, CMSConcurrentMTEnabled, true, \ 1776 "Whether multi-threaded concurrent work enabled " \ 1777 "(effective only if ParNewGC)") \ 1778 \ 1779 product(bool, CMSPrecleaningEnabled, true, \ 1780 "Whether concurrent precleaning enabled") \ 1781 \ 1782 product(uintx, CMSPrecleanIter, 3, \ 1783 "Maximum number of precleaning iteration passes") \ 1784 \ 1785 product(uintx, CMSPrecleanNumerator, 2, \ 1786 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1787 "ratio") \ 1788 \ 1789 product(uintx, CMSPrecleanDenominator, 3, \ 1790 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1791 "ratio") \ 1792 \ 1793 product(bool, CMSPrecleanRefLists1, true, \ 1794 "Preclean ref lists during (initial) preclean phase") \ 1795 \ 1796 product(bool, CMSPrecleanRefLists2, false, \ 1797 "Preclean ref lists during abortable preclean phase") \ 1798 \ 1799 product(bool, CMSPrecleanSurvivors1, false, \ 1800 "Preclean survivors during (initial) preclean phase") \ 1801 \ 1802 product(bool, CMSPrecleanSurvivors2, true, \ 1803 "Preclean survivors during abortable preclean phase") \ 1804 \ 1805 product(uintx, CMSPrecleanThreshold, 1000, \ 1806 "Do not iterate again if number of dirty cards is less than this")\ 1807 \ 1808 product(bool, CMSCleanOnEnter, true, \ 1809 "Clean-on-enter optimization for reducing number of dirty cards") \ 1810 \ 1811 product(uintx, CMSRemarkVerifyVariant, 1, \ 1812 "Choose variant (1,2) of verification following remark") \ 1813 \ 1814 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1815 "If Eden size is below this, do not try to schedule remark") \ 1816 \ 1817 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1818 "The Eden occupancy percentage (0-100) at which " \ 1819 "to try and schedule remark pause") \ 1820 \ 1821 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1822 "Start sampling eden top at least before young gen " \ 1823 "occupancy reaches 1/<ratio> of the size at which " \ 1824 "we plan to schedule remark") \ 1825 \ 1826 product(uintx, CMSSamplingGrain, 16*K, \ 1827 "The minimum distance between eden samples for CMS (see above)") \ 1828 \ 1829 product(bool, CMSScavengeBeforeRemark, false, \ 1830 "Attempt scavenge before the CMS remark step") \ 1831 \ 1832 develop(bool, CMSTraceSweeper, false, \ 1833 "Trace some actions of the CMS sweeper") \ 1834 \ 1835 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1836 "Don't drain below this size per parallel worker/thief") \ 1837 \ 1838 manageable(intx, CMSWaitDuration, 2000, \ 1839 "Time in milliseconds that CMS thread waits for young GC") \ 1840 \ 1841 develop(uintx, CMSCheckInterval, 1000, \ 1842 "Interval in milliseconds that CMS thread checks if it " \ 1843 "should start a collection cycle") \ 1844 \ 1845 product(bool, CMSYield, true, \ 1846 "Yield between steps of CMS") \ 1847 \ 1848 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1849 "Bitmap operations should process at most this many bits " \ 1850 "between yields") \ 1851 \ 1852 product(bool, CMSDumpAtPromotionFailure, false, \ 1853 "Dump useful information about the state of the CMS old " \ 1854 "generation upon a promotion failure") \ 1855 \ 1856 product(bool, CMSPrintChunksInDump, false, \ 1857 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1858 "more detailed information about the free chunks") \ 1859 \ 1860 product(bool, CMSPrintObjectsInDump, false, \ 1861 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1862 "more detailed information about the allocated objects") \ 1863 \ 1864 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1865 "Verify that all references across the FLS boundary " \ 1866 "are to valid objects") \ 1867 \ 1868 diagnostic(bool, FLSVerifyLists, false, \ 1869 "Do lots of (expensive) FreeListSpace verification") \ 1870 \ 1871 diagnostic(bool, FLSVerifyIndexTable, false, \ 1872 "Do lots of (expensive) FLS index table verification") \ 1873 \ 1874 develop(bool, FLSVerifyDictionary, false, \ 1875 "Do lots of (expensive) FLS dictionary verification") \ 1876 \ 1877 develop(bool, VerifyBlockOffsetArray, false, \ 1878 "Do (expensive) block offset array verification") \ 1879 \ 1880 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1881 "Maintain _unallocated_block in BlockOffsetArray " \ 1882 "(currently applicable only to CMS collector)") \ 1883 \ 1884 develop(bool, TraceCMSState, false, \ 1885 "Trace the state of the CMS collection") \ 1886 \ 1887 product(intx, RefDiscoveryPolicy, 0, \ 1888 "Select type of reference discovery policy: " \ 1889 "reference-based(0) or referent-based(1)") \ 1890 \ 1891 product(bool, ParallelRefProcEnabled, false, \ 1892 "Enable parallel reference processing whenever possible") \ 1893 \ 1894 product(bool, ParallelRefProcBalancingEnabled, true, \ 1895 "Enable balancing of reference processing queues") \ 1896 \ 1897 product(uintx, CMSTriggerRatio, 80, \ 1898 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1899 "allocated before a CMS collection cycle commences") \ 1900 \ 1901 product(uintx, CMSBootstrapOccupancy, 50, \ 1902 "Percentage CMS generation occupancy at which to " \ 1903 "initiate CMS collection for bootstrapping collection stats") \ 1904 \ 1905 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1906 "Percentage CMS generation occupancy to start a CMS collection " \ 1907 "cycle. A negative value means that CMSTriggerRatio is used") \ 1908 \ 1909 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1910 "Percentage of the (entire) heap occupancy to start a " \ 1911 "concurrent GC cycle. It is used by GCs that trigger a " \ 1912 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1913 "not just one of the generations (e.g., G1). A value of 0 " \ 1914 "denotes 'do constant GC cycles'.") \ 1915 \ 1916 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1917 "Only use occupancy as a criterion for starting a CMS collection")\ 1918 \ 1919 product(uintx, CMSIsTooFullPercentage, 98, \ 1920 "An absolute ceiling above which CMS will always consider the " \ 1921 "unloading of classes when class unloading is enabled") \ 1922 \ 1923 develop(bool, CMSTestInFreeList, false, \ 1924 "Check if the coalesced range is already in the " \ 1925 "free lists as claimed") \ 1926 \ 1927 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1928 "Check that all the garbage collected was returned to the " \ 1929 "free lists") \ 1930 \ 1931 notproduct(bool, ScavengeALot, false, \ 1932 "Force scavenge at every Nth exit from the runtime system " \ 1933 "(N=ScavengeALotInterval)") \ 1934 \ 1935 develop(bool, FullGCALot, false, \ 1936 "Force full gc at every Nth exit from the runtime system " \ 1937 "(N=FullGCALotInterval)") \ 1938 \ 1939 notproduct(bool, GCALotAtAllSafepoints, false, \ 1940 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1941 \ 1942 product(bool, PrintPromotionFailure, false, \ 1943 "Print additional diagnostic information following " \ 1944 "promotion failure") \ 1945 \ 1946 notproduct(bool, PromotionFailureALot, false, \ 1947 "Use promotion failure handling on every youngest generation " \ 1948 "collection") \ 1949 \ 1950 develop(uintx, PromotionFailureALotCount, 1000, \ 1951 "Number of promotion failures occurring at ParGCAllocBuffer " \ 1952 "refill attempts (ParNew) or promotion attempts " \ 1953 "(other young collectors)") \ 1954 \ 1955 develop(uintx, PromotionFailureALotInterval, 5, \ 1956 "Total collections between promotion failures alot") \ 1957 \ 1958 experimental(uintx, WorkStealingSleepMillis, 1, \ 1959 "Sleep time when sleep is used for yields") \ 1960 \ 1961 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1962 "Number of yields before a sleep is done during workstealing") \ 1963 \ 1964 experimental(uintx, WorkStealingHardSpins, 4096, \ 1965 "Number of iterations in a spin loop between checks on " \ 1966 "time out of hard spin") \ 1967 \ 1968 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1969 "Ratio of hard spins to calls to yield") \ 1970 \ 1971 develop(uintx, ObjArrayMarkingStride, 512, \ 1972 "Number of object array elements to push onto the marking stack " \ 1973 "before pushing a continuation entry") \ 1974 \ 1975 develop(bool, MetadataAllocationFailALot, false, \ 1976 "Fail metadata allocations at intervals controlled by " \ 1977 "MetadataAllocationFailALotInterval") \ 1978 \ 1979 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1980 "Metadata allocation failure a lot interval") \ 1981 \ 1982 develop(bool, MetaDataDeallocateALot, false, \ 1983 "Deallocation bunches of metadata at intervals controlled by " \ 1984 "MetaDataAllocateALotInterval") \ 1985 \ 1986 develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1987 "Metadata deallocation alot interval") \ 1988 \ 1989 develop(bool, TraceMetadataChunkAllocation, false, \ 1990 "Trace chunk metadata allocations") \ 1991 \ 1992 product(bool, TraceMetadataHumongousAllocation, false, \ 1993 "Trace humongous metadata allocations") \ 1994 \ 1995 develop(bool, TraceMetavirtualspaceAllocation, false, \ 1996 "Trace virtual space metadata allocations") \ 1997 \ 1998 notproduct(bool, ExecuteInternalVMTests, false, \ 1999 "Enable execution of internal VM tests") \ 2000 \ 2001 notproduct(bool, VerboseInternalVMTests, false, \ 2002 "Turn on logging for internal VM tests.") \ 2003 \ 2004 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2005 \ 2006 product_pd(bool, ResizeTLAB, \ 2007 "Dynamically resize TLAB size for threads") \ 2008 \ 2009 product(bool, ZeroTLAB, false, \ 2010 "Zero out the newly created TLAB") \ 2011 \ 2012 product(bool, FastTLABRefill, true, \ 2013 "Use fast TLAB refill code") \ 2014 \ 2015 product(bool, PrintTLAB, false, \ 2016 "Print various TLAB related information") \ 2017 \ 2018 product(bool, TLABStats, true, \ 2019 "Provide more detailed and expensive TLAB statistics " \ 2020 "(with PrintTLAB)") \ 2021 \ 2022 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 2023 "Enable LowMemoryProtection")) \ 2024 \ 2025 product_pd(bool, NeverActAsServerClassMachine, \ 2026 "Never act like a server-class machine") \ 2027 \ 2028 product(bool, AlwaysActAsServerClassMachine, false, \ 2029 "Always act like a server-class machine") \ 2030 \ 2031 product_pd(uint64_t, MaxRAM, \ 2032 "Real memory size (in bytes) used to set maximum heap size") \ 2033 \ 2034 product(uintx, ErgoHeapSizeLimit, 0, \ 2035 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2036 "MaxRAM / MaxRAMFraction") \ 2037 \ 2038 product(uintx, MaxRAMFraction, 4, \ 2039 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2040 "size") \ 2041 \ 2042 product(uintx, DefaultMaxRAMFraction, 4, \ 2043 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2044 "size; deprecated: to be renamed to MaxRAMFraction") \ 2045 \ 2046 product(uintx, MinRAMFraction, 2, \ 2047 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 2048 "size on systems with small physical memory size") \ 2049 \ 2050 product(uintx, InitialRAMFraction, 64, \ 2051 "Fraction (1/n) of real memory used for initial heap size") \ 2052 \ 2053 develop(uintx, MaxVirtMemFraction, 2, \ 2054 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2055 "determining maximum heap size") \ 2056 \ 2057 product(bool, UseAutoGCSelectPolicy, false, \ 2058 "Use automatic collection selection policy") \ 2059 \ 2060 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2061 "Automatic GC selection pause threshold in milliseconds") \ 2062 \ 2063 product(bool, UseAdaptiveSizePolicy, true, \ 2064 "Use adaptive generation sizing policies") \ 2065 \ 2066 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2067 "Use adaptive survivor sizing policies") \ 2068 \ 2069 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2070 "Use adaptive young-old sizing policies at minor collections") \ 2071 \ 2072 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2073 "Use adaptive young-old sizing policies at major collections") \ 2074 \ 2075 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2076 "Include statistics from System.gc() for adaptive size policy") \ 2077 \ 2078 product(bool, UseAdaptiveGCBoundary, false, \ 2079 "Allow young-old boundary to move") \ 2080 \ 2081 develop(bool, TraceAdaptiveGCBoundary, false, \ 2082 "Trace young-old boundary moves") \ 2083 \ 2084 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2085 "Resize the virtual spaces of the young or old generations") \ 2086 \ 2087 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2088 "Policy for changing generation size for throughput goals") \ 2089 \ 2090 product(uintx, AdaptiveSizePausePolicy, 0, \ 2091 "Policy for changing generation size for pause goals") \ 2092 \ 2093 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2094 "Adjust tenured generation to achieve a minor pause goal") \ 2095 \ 2096 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2097 "Adjust young generation to achieve a major pause goal") \ 2098 \ 2099 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2100 "Number of steps where heuristics is used before data is used") \ 2101 \ 2102 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2103 "Number of collections before the adaptive sizing is started") \ 2104 \ 2105 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2106 "Collection interval for printing information; zero means never") \ 2107 \ 2108 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2109 "Use adaptive minimum footprint as a goal") \ 2110 \ 2111 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2112 "Weight given to exponential resizing, between 0 and 100") \ 2113 \ 2114 product(uintx, AdaptiveTimeWeight, 25, \ 2115 "Weight given to time in adaptive policy, between 0 and 100") \ 2116 \ 2117 product(uintx, PausePadding, 1, \ 2118 "How much buffer to keep for pause time") \ 2119 \ 2120 product(uintx, PromotedPadding, 3, \ 2121 "How much buffer to keep for promotion failure") \ 2122 \ 2123 product(uintx, SurvivorPadding, 3, \ 2124 "How much buffer to keep for survivor overflow") \ 2125 \ 2126 product(uintx, ThresholdTolerance, 10, \ 2127 "Allowed collection cost difference between generations") \ 2128 \ 2129 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2130 "If collection costs are within margin, reduce both by full " \ 2131 "delta") \ 2132 \ 2133 product(uintx, YoungGenerationSizeIncrement, 20, \ 2134 "Adaptive size percentage change in young generation") \ 2135 \ 2136 product(uintx, YoungGenerationSizeSupplement, 80, \ 2137 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2138 \ 2139 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2140 "Decay factor to YoungedGenerationSizeSupplement") \ 2141 \ 2142 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2143 "Adaptive size percentage change in tenured generation") \ 2144 \ 2145 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2146 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2147 \ 2148 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2149 "Decay factor to TenuredGenerationSizeIncrement") \ 2150 \ 2151 product(uintx, MaxGCPauseMillis, max_uintx, \ 2152 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2153 "or (G1 Only) the maximum GC time per MMU time slice") \ 2154 \ 2155 product(uintx, GCPauseIntervalMillis, 0, \ 2156 "Time slice for MMU specification") \ 2157 \ 2158 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2159 "Adaptive size policy maximum GC minor pause time goal " \ 2160 "in millisecond") \ 2161 \ 2162 product(uintx, GCTimeRatio, 99, \ 2163 "Adaptive size policy application time to GC time ratio") \ 2164 \ 2165 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2166 "Adaptive size scale down factor for shrinking") \ 2167 \ 2168 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2169 "Adaptive size decays the major cost for long major intervals") \ 2170 \ 2171 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2172 "Time scale over which major costs decay") \ 2173 \ 2174 product(uintx, MinSurvivorRatio, 3, \ 2175 "Minimum ratio of young generation/survivor space size") \ 2176 \ 2177 product(uintx, InitialSurvivorRatio, 8, \ 2178 "Initial ratio of young generation/survivor space size") \ 2179 \ 2180 product(uintx, BaseFootPrintEstimate, 256*M, \ 2181 "Estimate of footprint other than Java Heap") \ 2182 \ 2183 product(bool, UseGCOverheadLimit, true, \ 2184 "Use policy to limit of proportion of time spent in GC " \ 2185 "before an OutOfMemory error is thrown") \ 2186 \ 2187 product(uintx, GCTimeLimit, 98, \ 2188 "Limit of the proportion of time spent in GC before " \ 2189 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2190 \ 2191 product(uintx, GCHeapFreeLimit, 2, \ 2192 "Minimum percentage of free space after a full GC before an " \ 2193 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2194 \ 2195 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2196 "Number of consecutive collections before gc time limit fires") \ 2197 \ 2198 product(bool, PrintAdaptiveSizePolicy, false, \ 2199 "Print information about AdaptiveSizePolicy") \ 2200 \ 2201 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2202 "How far ahead to prefetch destination area (<= 0 means off)") \ 2203 \ 2204 product(intx, PrefetchScanIntervalInBytes, -1, \ 2205 "How far ahead to prefetch scan area (<= 0 means off)") \ 2206 \ 2207 product(intx, PrefetchFieldsAhead, -1, \ 2208 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2209 \ 2210 diagnostic(bool, VerifySilently, false, \ 2211 "Do not print the verification progress") \ 2212 \ 2213 diagnostic(bool, VerifyDuringStartup, false, \ 2214 "Verify memory system before executing any Java code " \ 2215 "during VM initialization") \ 2216 \ 2217 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2218 "Verify system before exiting") \ 2219 \ 2220 diagnostic(bool, VerifyBeforeGC, false, \ 2221 "Verify memory system before GC") \ 2222 \ 2223 diagnostic(bool, VerifyAfterGC, false, \ 2224 "Verify memory system after GC") \ 2225 \ 2226 diagnostic(bool, VerifyDuringGC, false, \ 2227 "Verify memory system during GC (between phases)") \ 2228 \ 2229 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2230 "Enable parallel memory system verification") \ 2231 \ 2232 diagnostic(bool, DeferInitialCardMark, false, \ 2233 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2234 "may arise from new_pre_store_barrier") \ 2235 \ 2236 diagnostic(bool, VerifyRememberedSets, false, \ 2237 "Verify GC remembered sets") \ 2238 \ 2239 diagnostic(bool, VerifyObjectStartArray, true, \ 2240 "Verify GC object start array if verify before/after") \ 2241 \ 2242 product(bool, DisableExplicitGC, false, \ 2243 "Ignore calls to System.gc()") \ 2244 \ 2245 notproduct(bool, CheckMemoryInitialization, false, \ 2246 "Check memory initialization") \ 2247 \ 2248 product(bool, CollectGen0First, false, \ 2249 "Collect youngest generation before each full GC") \ 2250 \ 2251 diagnostic(bool, BindCMSThreadToCPU, false, \ 2252 "Bind CMS Thread to CPU if possible") \ 2253 \ 2254 diagnostic(uintx, CPUForCMSThread, 0, \ 2255 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2256 \ 2257 product(bool, BindGCTaskThreadsToCPUs, false, \ 2258 "Bind GCTaskThreads to CPUs if possible") \ 2259 \ 2260 product(bool, UseGCTaskAffinity, false, \ 2261 "Use worker affinity when asking for GCTasks") \ 2262 \ 2263 product(uintx, ProcessDistributionStride, 4, \ 2264 "Stride through processors when distributing processes") \ 2265 \ 2266 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2267 "Number of times the coordinator GC thread will sleep while " \ 2268 "yielding before giving up and resuming GC") \ 2269 \ 2270 product(uintx, CMSYieldSleepCount, 0, \ 2271 "Number of times a GC thread (minus the coordinator) " \ 2272 "will sleep while yielding before giving up and resuming GC") \ 2273 \ 2274 /* gc tracing */ \ 2275 manageable(bool, PrintGC, false, \ 2276 "Print message at garbage collection") \ 2277 \ 2278 manageable(bool, PrintGCDetails, false, \ 2279 "Print more details at garbage collection") \ 2280 \ 2281 manageable(bool, PrintGCDateStamps, false, \ 2282 "Print date stamps at garbage collection") \ 2283 \ 2284 manageable(bool, PrintGCTimeStamps, false, \ 2285 "Print timestamps at garbage collection") \ 2286 \ 2287 product(bool, PrintGCTaskTimeStamps, false, \ 2288 "Print timestamps for individual gc worker thread tasks") \ 2289 \ 2290 develop(intx, ConcGCYieldTimeout, 0, \ 2291 "If non-zero, assert that GC threads yield within this " \ 2292 "number of milliseconds") \ 2293 \ 2294 notproduct(bool, TraceMarkSweep, false, \ 2295 "Trace mark sweep") \ 2296 \ 2297 product(bool, PrintReferenceGC, false, \ 2298 "Print times spent handling reference objects during GC " \ 2299 "(enabled only when PrintGCDetails)") \ 2300 \ 2301 develop(bool, TraceReferenceGC, false, \ 2302 "Trace handling of soft/weak/final/phantom references") \ 2303 \ 2304 develop(bool, TraceFinalizerRegistration, false, \ 2305 "Trace registration of final references") \ 2306 \ 2307 notproduct(bool, TraceScavenge, false, \ 2308 "Trace scavenge") \ 2309 \ 2310 product_rw(bool, TraceClassLoading, false, \ 2311 "Trace all classes loaded") \ 2312 \ 2313 product(bool, TraceClassLoadingPreorder, false, \ 2314 "Trace all classes loaded in order referenced (not loaded)") \ 2315 \ 2316 product_rw(bool, TraceClassUnloading, false, \ 2317 "Trace unloading of classes") \ 2318 \ 2319 product_rw(bool, TraceLoaderConstraints, false, \ 2320 "Trace loader constraints") \ 2321 \ 2322 develop(bool, TraceClassLoaderData, false, \ 2323 "Trace class loader loader_data lifetime") \ 2324 \ 2325 product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2326 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2327 "Initial size of the boot class loader data metaspace") \ 2328 \ 2329 product(bool, TraceGen0Time, false, \ 2330 "Trace accumulated time for Gen 0 collection") \ 2331 \ 2332 product(bool, TraceGen1Time, false, \ 2333 "Trace accumulated time for Gen 1 collection") \ 2334 \ 2335 product(bool, PrintTenuringDistribution, false, \ 2336 "Print tenuring age information") \ 2337 \ 2338 product_rw(bool, PrintHeapAtGC, false, \ 2339 "Print heap layout before and after each GC") \ 2340 \ 2341 product_rw(bool, PrintHeapAtGCExtended, false, \ 2342 "Print extended information about the layout of the heap " \ 2343 "when -XX:+PrintHeapAtGC is set") \ 2344 \ 2345 product(bool, PrintHeapAtSIGBREAK, true, \ 2346 "Print heap layout in response to SIGBREAK") \ 2347 \ 2348 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2349 "Print a class histogram before any major stop-world GC") \ 2350 \ 2351 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2352 "Print a class histogram after any major stop-world GC") \ 2353 \ 2354 manageable(bool, PrintClassHistogram, false, \ 2355 "Print a histogram of class instances") \ 2356 \ 2357 develop(bool, TraceWorkGang, false, \ 2358 "Trace activities of work gangs") \ 2359 \ 2360 product(bool, TraceParallelOldGCTasks, false, \ 2361 "Trace multithreaded GC activity") \ 2362 \ 2363 develop(bool, TraceBlockOffsetTable, false, \ 2364 "Print BlockOffsetTable maps") \ 2365 \ 2366 develop(bool, TraceCardTableModRefBS, false, \ 2367 "Print CardTableModRefBS maps") \ 2368 \ 2369 develop(bool, TraceGCTaskManager, false, \ 2370 "Trace actions of the GC task manager") \ 2371 \ 2372 develop(bool, TraceGCTaskQueue, false, \ 2373 "Trace actions of the GC task queues") \ 2374 \ 2375 diagnostic(bool, TraceGCTaskThread, false, \ 2376 "Trace actions of the GC task threads") \ 2377 \ 2378 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2379 "Print the time taken by each phase in ParallelOldGC " \ 2380 "(PrintGCDetails must also be enabled)") \ 2381 \ 2382 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2383 "Trace marking phase in ParallelOldGC") \ 2384 \ 2385 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2386 "Trace summary phase in ParallelOldGC") \ 2387 \ 2388 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2389 "Trace compaction phase in ParallelOldGC") \ 2390 \ 2391 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2392 "Trace dense prefix computation for ParallelOldGC") \ 2393 \ 2394 develop(bool, IgnoreLibthreadGPFault, false, \ 2395 "Suppress workaround for libthread GP fault") \ 2396 \ 2397 product(bool, PrintJNIGCStalls, false, \ 2398 "Print diagnostic message when GC is stalled " \ 2399 "by JNI critical section") \ 2400 \ 2401 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2402 "The percentage of the used heap that the instances of a class " \ 2403 "must occupy for the class to generate a trace event") \ 2404 \ 2405 /* GC log rotation setting */ \ 2406 \ 2407 product(bool, UseGCLogFileRotation, false, \ 2408 "Rotate gclog files (for long running applications). It requires "\ 2409 "-Xloggc:<filename>") \ 2410 \ 2411 product(uintx, NumberOfGCLogFiles, 0, \ 2412 "Number of gclog files in rotation " \ 2413 "(default: 0, no rotation)") \ 2414 \ 2415 product(uintx, GCLogFileSize, 0, \ 2416 "GC log file size (default: 0 bytes, no rotation). " \ 2417 "It requires UseGCLogFileRotation") \ 2418 \ 2419 /* JVMTI heap profiling */ \ 2420 \ 2421 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2422 "Trace JVMTI object tagging calls") \ 2423 \ 2424 diagnostic(bool, VerifyBeforeIteration, false, \ 2425 "Verify memory system before JVMTI iteration") \ 2426 \ 2427 /* compiler interface */ \ 2428 \ 2429 develop(bool, CIPrintCompilerName, false, \ 2430 "when CIPrint is active, print the name of the active compiler") \ 2431 \ 2432 develop(bool, CIPrintCompileQueue, false, \ 2433 "display the contents of the compile queue whenever a " \ 2434 "compilation is enqueued") \ 2435 \ 2436 develop(bool, CIPrintRequests, false, \ 2437 "display every request for compilation") \ 2438 \ 2439 product(bool, CITime, false, \ 2440 "collect timing information for compilation") \ 2441 \ 2442 develop(bool, CITimeEach, false, \ 2443 "display timing information after each successful compilation") \ 2444 \ 2445 develop(bool, CICountOSR, false, \ 2446 "use a separate counter when assigning ids to osr compilations") \ 2447 \ 2448 develop(bool, CICompileNatives, true, \ 2449 "compile native methods if supported by the compiler") \ 2450 \ 2451 develop_pd(bool, CICompileOSR, \ 2452 "compile on stack replacement methods if supported by the " \ 2453 "compiler") \ 2454 \ 2455 develop(bool, CIPrintMethodCodes, false, \ 2456 "print method bytecodes of the compiled code") \ 2457 \ 2458 develop(bool, CIPrintTypeFlow, false, \ 2459 "print the results of ciTypeFlow analysis") \ 2460 \ 2461 develop(bool, CITraceTypeFlow, false, \ 2462 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2463 \ 2464 develop(intx, OSROnlyBCI, -1, \ 2465 "OSR only at this bci. Negative values mean exclude that bci") \ 2466 \ 2467 /* compiler */ \ 2468 \ 2469 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2470 "Number of compiler threads to run") \ 2471 \ 2472 product(intx, CompilationPolicyChoice, 0, \ 2473 "which compilation policy (0/1)") \ 2474 \ 2475 develop(bool, UseStackBanging, true, \ 2476 "use stack banging for stack overflow checks (required for " \ 2477 "proper StackOverflow handling; disable only to measure cost " \ 2478 "of stackbanging)") \ 2479 \ 2480 develop(bool, UseStrictFP, true, \ 2481 "use strict fp if modifier strictfp is set") \ 2482 \ 2483 develop(bool, GenerateSynchronizationCode, true, \ 2484 "generate locking/unlocking code for synchronized methods and " \ 2485 "monitors") \ 2486 \ 2487 develop(bool, GenerateCompilerNullChecks, true, \ 2488 "Generate explicit null checks for loads/stores/calls") \ 2489 \ 2490 develop(bool, GenerateRangeChecks, true, \ 2491 "Generate range checks for array accesses") \ 2492 \ 2493 develop_pd(bool, ImplicitNullChecks, \ 2494 "Generate code for implicit null checks") \ 2495 \ 2496 product(bool, PrintSafepointStatistics, false, \ 2497 "Print statistics about safepoint synchronization") \ 2498 \ 2499 product(intx, PrintSafepointStatisticsCount, 300, \ 2500 "Total number of safepoint statistics collected " \ 2501 "before printing them out") \ 2502 \ 2503 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2504 "Print safepoint statistics only when safepoint takes " \ 2505 "more than PrintSafepointSatisticsTimeout in millis") \ 2506 \ 2507 product(bool, TraceSafepointCleanupTime, false, \ 2508 "Print the break down of clean up tasks performed during " \ 2509 "safepoint") \ 2510 \ 2511 product(bool, Inline, true, \ 2512 "Enable inlining") \ 2513 \ 2514 product(bool, ClipInlining, true, \ 2515 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2516 \ 2517 develop(bool, UseCHA, true, \ 2518 "Enable CHA") \ 2519 \ 2520 product(bool, UseTypeProfile, true, \ 2521 "Check interpreter profile for historically monomorphic calls") \ 2522 \ 2523 notproduct(bool, TimeCompiler, false, \ 2524 "Time the compiler") \ 2525 \ 2526 diagnostic(bool, PrintInlining, false, \ 2527 "Print inlining optimizations") \ 2528 \ 2529 product(bool, UsePopCountInstruction, false, \ 2530 "Use population count instruction") \ 2531 \ 2532 develop(bool, EagerInitialization, false, \ 2533 "Eagerly initialize classes if possible") \ 2534 \ 2535 develop(bool, TraceMethodReplacement, false, \ 2536 "Print when methods are replaced do to recompilation") \ 2537 \ 2538 develop(bool, PrintMethodFlushing, false, \ 2539 "Print the nmethods being flushed") \ 2540 \ 2541 develop(bool, UseRelocIndex, false, \ 2542 "Use an index to speed random access to relocations") \ 2543 \ 2544 develop(bool, StressCodeBuffers, false, \ 2545 "Exercise code buffer expansion and other rare state changes") \ 2546 \ 2547 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2548 "Generate extra debugging information for non-safepoints in " \ 2549 "nmethods") \ 2550 \ 2551 product(bool, PrintVMOptions, false, \ 2552 "Print flags that appeared on the command line") \ 2553 \ 2554 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2555 "Ignore unrecognized VM options") \ 2556 \ 2557 product(bool, PrintCommandLineFlags, false, \ 2558 "Print flags specified on command line or set by ergonomics") \ 2559 \ 2560 product(bool, PrintFlagsInitial, false, \ 2561 "Print all VM flags before argument processing and exit VM") \ 2562 \ 2563 product(bool, PrintFlagsFinal, false, \ 2564 "Print all VM flags after argument and ergonomic processing") \ 2565 \ 2566 notproduct(bool, PrintFlagsWithComments, false, \ 2567 "Print all VM flags with default values and descriptions and " \ 2568 "exit") \ 2569 \ 2570 diagnostic(bool, SerializeVMOutput, true, \ 2571 "Use a mutex to serialize output to tty and LogFile") \ 2572 \ 2573 diagnostic(bool, DisplayVMOutput, true, \ 2574 "Display all VM output on the tty, independently of LogVMOutput") \ 2575 \ 2576 diagnostic(bool, LogVMOutput, false, \ 2577 "Save VM output to LogFile") \ 2578 \ 2579 diagnostic(ccstr, LogFile, NULL, \ 2580 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2581 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2582 \ 2583 product(ccstr, ErrorFile, NULL, \ 2584 "If an error occurs, save the error data to this file " \ 2585 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2586 \ 2587 product(bool, DisplayVMOutputToStderr, false, \ 2588 "If DisplayVMOutput is true, display all VM output to stderr") \ 2589 \ 2590 product(bool, DisplayVMOutputToStdout, false, \ 2591 "If DisplayVMOutput is true, display all VM output to stdout") \ 2592 \ 2593 product(bool, UseHeavyMonitors, false, \ 2594 "use heavyweight instead of lightweight Java monitors") \ 2595 \ 2596 product(bool, PrintStringTableStatistics, false, \ 2597 "print statistics about the StringTable and SymbolTable") \ 2598 \ 2599 diagnostic(bool, VerifyStringTableAtExit, false, \ 2600 "verify StringTable contents at exit") \ 2601 \ 2602 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2603 "print histogram of the symbol table") \ 2604 \ 2605 notproduct(bool, ExitVMOnVerifyError, false, \ 2606 "standard exit from VM if bytecode verify error " \ 2607 "(only in debug mode)") \ 2608 \ 2609 notproduct(ccstr, AbortVMOnException, NULL, \ 2610 "Call fatal if this exception is thrown. Example: " \ 2611 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2612 \ 2613 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2614 "Call fatal if the exception pointed by AbortVMOnException " \ 2615 "has this message") \ 2616 \ 2617 develop(bool, DebugVtables, false, \ 2618 "add debugging code to vtable dispatch") \ 2619 \ 2620 develop(bool, PrintVtables, false, \ 2621 "print vtables when printing klass") \ 2622 \ 2623 notproduct(bool, PrintVtableStats, false, \ 2624 "print vtables stats at end of run") \ 2625 \ 2626 develop(bool, TraceCreateZombies, false, \ 2627 "trace creation of zombie nmethods") \ 2628 \ 2629 notproduct(bool, IgnoreLockingAssertions, false, \ 2630 "disable locking assertions (for speed)") \ 2631 \ 2632 product(bool, RangeCheckElimination, true, \ 2633 "Eliminate range checks") \ 2634 \ 2635 develop_pd(bool, UncommonNullCast, \ 2636 "track occurrences of null in casts; adjust compiler tactics") \ 2637 \ 2638 develop(bool, TypeProfileCasts, true, \ 2639 "treat casts like calls for purposes of type profiling") \ 2640 \ 2641 develop(bool, DelayCompilationDuringStartup, true, \ 2642 "Delay invoking the compiler until main application class is " \ 2643 "loaded") \ 2644 \ 2645 develop(bool, CompileTheWorld, false, \ 2646 "Compile all methods in all classes in bootstrap class path " \ 2647 "(stress test)") \ 2648 \ 2649 develop(bool, CompileTheWorldPreloadClasses, true, \ 2650 "Preload all classes used by a class before start loading") \ 2651 \ 2652 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2653 "Force a safepoint every n compiles so sweeper can keep up") \ 2654 \ 2655 develop(bool, FillDelaySlots, true, \ 2656 "Fill delay slots (on SPARC only)") \ 2657 \ 2658 develop(bool, TimeLivenessAnalysis, false, \ 2659 "Time computation of bytecode liveness analysis") \ 2660 \ 2661 develop(bool, TraceLivenessGen, false, \ 2662 "Trace the generation of liveness analysis information") \ 2663 \ 2664 notproduct(bool, TraceLivenessQuery, false, \ 2665 "Trace queries of liveness analysis information") \ 2666 \ 2667 notproduct(bool, CollectIndexSetStatistics, false, \ 2668 "Collect information about IndexSets") \ 2669 \ 2670 develop(bool, UseLoopSafepoints, true, \ 2671 "Generate Safepoint nodes in every loop") \ 2672 \ 2673 develop(intx, FastAllocateSizeLimit, 128*K, \ 2674 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2675 "Inline allocations larger than this in doublewords must go slow")\ 2676 \ 2677 product(bool, AggressiveOpts, false, \ 2678 "Enable aggressive optimizations - see arguments.cpp") \ 2679 \ 2680 /* statistics */ \ 2681 develop(bool, CountCompiledCalls, false, \ 2682 "Count method invocations") \ 2683 \ 2684 notproduct(bool, CountRuntimeCalls, false, \ 2685 "Count VM runtime calls") \ 2686 \ 2687 develop(bool, CountJNICalls, false, \ 2688 "Count jni method invocations") \ 2689 \ 2690 notproduct(bool, CountJVMCalls, false, \ 2691 "Count jvm method invocations") \ 2692 \ 2693 notproduct(bool, CountRemovableExceptions, false, \ 2694 "Count exceptions that could be replaced by branches due to " \ 2695 "inlining") \ 2696 \ 2697 notproduct(bool, ICMissHistogram, false, \ 2698 "Produce histogram of IC misses") \ 2699 \ 2700 notproduct(bool, PrintClassStatistics, false, \ 2701 "Print class statistics at end of run") \ 2702 \ 2703 notproduct(bool, PrintMethodStatistics, false, \ 2704 "Print method statistics at end of run") \ 2705 \ 2706 /* interpreter */ \ 2707 develop(bool, ClearInterpreterLocals, false, \ 2708 "Always clear local variables of interpreter activations upon " \ 2709 "entry") \ 2710 \ 2711 product_pd(bool, RewriteBytecodes, \ 2712 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2713 \ 2714 product_pd(bool, RewriteFrequentPairs, \ 2715 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2716 \ 2717 diagnostic(bool, PrintInterpreter, false, \ 2718 "Print the generated interpreter code") \ 2719 \ 2720 product(bool, UseInterpreter, true, \ 2721 "Use interpreter for non-compiled methods") \ 2722 \ 2723 develop(bool, UseFastSignatureHandlers, true, \ 2724 "Use fast signature handlers for native calls") \ 2725 \ 2726 product(bool, UseLoopCounter, true, \ 2727 "Increment invocation counter on backward branch") \ 2728 \ 2729 product(bool, UseFastEmptyMethods, true, \ 2730 "Use fast method entry code for empty methods") \ 2731 \ 2732 product(bool, UseFastAccessorMethods, true, \ 2733 "Use fast method entry code for accessor methods") \ 2734 \ 2735 product_pd(bool, UseOnStackReplacement, \ 2736 "Use on stack replacement, calls runtime if invoc. counter " \ 2737 "overflows in loop") \ 2738 \ 2739 notproduct(bool, TraceOnStackReplacement, false, \ 2740 "Trace on stack replacement") \ 2741 \ 2742 product_pd(bool, PreferInterpreterNativeStubs, \ 2743 "Use always interpreter stubs for native methods invoked via " \ 2744 "interpreter") \ 2745 \ 2746 develop(bool, CountBytecodes, false, \ 2747 "Count number of bytecodes executed") \ 2748 \ 2749 develop(bool, PrintBytecodeHistogram, false, \ 2750 "Print histogram of the executed bytecodes") \ 2751 \ 2752 develop(bool, PrintBytecodePairHistogram, false, \ 2753 "Print histogram of the executed bytecode pairs") \ 2754 \ 2755 diagnostic(bool, PrintSignatureHandlers, false, \ 2756 "Print code generated for native method signature handlers") \ 2757 \ 2758 develop(bool, VerifyOops, false, \ 2759 "Do plausibility checks for oops") \ 2760 \ 2761 develop(bool, CheckUnhandledOops, false, \ 2762 "Check for unhandled oops in VM code") \ 2763 \ 2764 develop(bool, VerifyJNIFields, trueInDebug, \ 2765 "Verify jfieldIDs for instance fields") \ 2766 \ 2767 notproduct(bool, VerifyJNIEnvThread, false, \ 2768 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2769 "from JNI") \ 2770 \ 2771 develop(bool, VerifyFPU, false, \ 2772 "Verify FPU state (check for NaN's, etc.)") \ 2773 \ 2774 develop(bool, VerifyThread, false, \ 2775 "Watch the thread register for corruption (SPARC only)") \ 2776 \ 2777 develop(bool, VerifyActivationFrameSize, false, \ 2778 "Verify that activation frame didn't become smaller than its " \ 2779 "minimal size") \ 2780 \ 2781 develop(bool, TraceFrequencyInlining, false, \ 2782 "Trace frequency based inlining") \ 2783 \ 2784 develop_pd(bool, InlineIntrinsics, \ 2785 "Inline intrinsics that can be statically resolved") \ 2786 \ 2787 product_pd(bool, ProfileInterpreter, \ 2788 "Profile at the bytecode level during interpretation") \ 2789 \ 2790 develop_pd(bool, ProfileTraps, \ 2791 "Profile deoptimization traps at the bytecode level") \ 2792 \ 2793 product(intx, ProfileMaturityPercentage, 20, \ 2794 "number of method invocations/branches (expressed as % of " \ 2795 "CompileThreshold) before using the method's profile") \ 2796 \ 2797 develop(bool, PrintMethodData, false, \ 2798 "Print the results of +ProfileInterpreter at end of run") \ 2799 \ 2800 develop(bool, VerifyDataPointer, trueInDebug, \ 2801 "Verify the method data pointer during interpreter profiling") \ 2802 \ 2803 develop(bool, VerifyCompiledCode, false, \ 2804 "Include miscellaneous runtime verifications in nmethod code; " \ 2805 "default off because it disturbs nmethod size heuristics") \ 2806 \ 2807 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2808 "Manually make GC thread crash then dump java stack trace; " \ 2809 "Test only") \ 2810 \ 2811 /* compilation */ \ 2812 product(bool, UseCompiler, true, \ 2813 "Use Just-In-Time compilation") \ 2814 \ 2815 develop(bool, TraceCompilationPolicy, false, \ 2816 "Trace compilation policy") \ 2817 \ 2818 develop(bool, TimeCompilationPolicy, false, \ 2819 "Time the compilation policy") \ 2820 \ 2821 product(bool, UseCounterDecay, true, \ 2822 "Adjust recompilation counters") \ 2823 \ 2824 develop(intx, CounterHalfLifeTime, 30, \ 2825 "Half-life time of invocation counters (in seconds)") \ 2826 \ 2827 develop(intx, CounterDecayMinIntervalLength, 500, \ 2828 "The minimum interval (in milliseconds) between invocation of " \ 2829 "CounterDecay") \ 2830 \ 2831 product(bool, AlwaysCompileLoopMethods, false, \ 2832 "When using recompilation, never interpret methods " \ 2833 "containing loops") \ 2834 \ 2835 product(bool, DontCompileHugeMethods, true, \ 2836 "Do not compile methods > HugeMethodLimit") \ 2837 \ 2838 /* Bytecode escape analysis estimation. */ \ 2839 product(bool, EstimateArgEscape, true, \ 2840 "Analyze bytecodes to estimate escape state of arguments") \ 2841 \ 2842 product(intx, BCEATraceLevel, 0, \ 2843 "How much tracing to do of bytecode escape analysis estimates") \ 2844 \ 2845 product(intx, MaxBCEAEstimateLevel, 5, \ 2846 "Maximum number of nested calls that are analyzed by BC EA") \ 2847 \ 2848 product(intx, MaxBCEAEstimateSize, 150, \ 2849 "Maximum bytecode size of a method to be analyzed by BC EA") \ 2850 \ 2851 product(intx, AllocatePrefetchStyle, 1, \ 2852 "0 = no prefetch, " \ 2853 "1 = prefetch instructions for each allocation, " \ 2854 "2 = use TLAB watermark to gate allocation prefetch, " \ 2855 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2856 \ 2857 product(intx, AllocatePrefetchDistance, -1, \ 2858 "Distance to prefetch ahead of allocation pointer") \ 2859 \ 2860 product(intx, AllocatePrefetchLines, 3, \ 2861 "Number of lines to prefetch ahead of array allocation pointer") \ 2862 \ 2863 product(intx, AllocateInstancePrefetchLines, 1, \ 2864 "Number of lines to prefetch ahead of instance allocation " \ 2865 "pointer") \ 2866 \ 2867 product(intx, AllocatePrefetchStepSize, 16, \ 2868 "Step size in bytes of sequential prefetch instructions") \ 2869 \ 2870 product(intx, AllocatePrefetchInstr, 0, \ 2871 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2872 \ 2873 /* deoptimization */ \ 2874 develop(bool, TraceDeoptimization, false, \ 2875 "Trace deoptimization") \ 2876 \ 2877 develop(bool, DebugDeoptimization, false, \ 2878 "Tracing various information while debugging deoptimization") \ 2879 \ 2880 product(intx, SelfDestructTimer, 0, \ 2881 "Will cause VM to terminate after a given time (in minutes) " \ 2882 "(0 means off)") \ 2883 \ 2884 product(intx, MaxJavaStackTraceDepth, 1024, \ 2885 "The maximum number of lines in the stack trace for Java " \ 2886 "exceptions (0 means all)") \ 2887 \ 2888 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2889 "Guarantee a safepoint (at least) every so many milliseconds " \ 2890 "(0 means none)")) \ 2891 \ 2892 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2893 "Guarantee a safepoint (at least) every so many milliseconds " \ 2894 "(0 means none)")) \ 2895 \ 2896 product(intx, SafepointTimeoutDelay, 10000, \ 2897 "Delay in milliseconds for option SafepointTimeout") \ 2898 \ 2899 product(intx, NmethodSweepFraction, 16, \ 2900 "Number of invocations of sweeper to cover all nmethods") \ 2901 \ 2902 product(intx, NmethodSweepCheckInterval, 5, \ 2903 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2904 \ 2905 product(intx, NmethodSweepActivity, 10, \ 2906 "Removes cold nmethods from code cache if > 0. Higher values " \ 2907 "result in more aggressive sweeping") \ 2908 \ 2909 notproduct(bool, LogSweeper, false, \ 2910 "Keep a ring buffer of sweeper activity") \ 2911 \ 2912 notproduct(intx, SweeperLogEntries, 1024, \ 2913 "Number of records in the ring buffer of sweeper activity") \ 2914 \ 2915 notproduct(intx, MemProfilingInterval, 500, \ 2916 "Time between each invocation of the MemProfiler") \ 2917 \ 2918 develop(intx, MallocCatchPtr, -1, \ 2919 "Hit breakpoint when mallocing/freeing this pointer") \ 2920 \ 2921 notproduct(intx, AssertRepeat, 1, \ 2922 "number of times to evaluate expression in assert " \ 2923 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2924 \ 2925 notproduct(ccstrlist, SuppressErrorAt, "", \ 2926 "List of assertions (file:line) to muzzle") \ 2927 \ 2928 notproduct(uintx, HandleAllocationLimit, 1024, \ 2929 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2930 "is used") \ 2931 \ 2932 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2933 "Threshold for total handle allocation when " \ 2934 "+TraceHandleAllocation is used") \ 2935 \ 2936 develop(intx, StackPrintLimit, 100, \ 2937 "number of stack frames to print in VM-level stack dump") \ 2938 \ 2939 notproduct(intx, MaxElementPrintSize, 256, \ 2940 "maximum number of elements to print") \ 2941 \ 2942 notproduct(intx, MaxSubklassPrintSize, 4, \ 2943 "maximum number of subklasses to print when printing klass") \ 2944 \ 2945 product(intx, MaxInlineLevel, 9, \ 2946 "maximum number of nested calls that are inlined") \ 2947 \ 2948 product(intx, MaxRecursiveInlineLevel, 1, \ 2949 "maximum number of nested recursive calls that are inlined") \ 2950 \ 2951 product_pd(intx, InlineSmallCode, \ 2952 "Only inline already compiled methods if their code size is " \ 2953 "less than this") \ 2954 \ 2955 product(intx, MaxInlineSize, 35, \ 2956 "The maximum bytecode size of a method to be inlined") \ 2957 \ 2958 product_pd(intx, FreqInlineSize, \ 2959 "The maximum bytecode size of a frequent method to be inlined") \ 2960 \ 2961 product(intx, MaxTrivialSize, 6, \ 2962 "The maximum bytecode size of a trivial method to be inlined") \ 2963 \ 2964 product(intx, MinInliningThreshold, 250, \ 2965 "The minimum invocation count a method needs to have to be " \ 2966 "inlined") \ 2967 \ 2968 develop(intx, MethodHistogramCutoff, 100, \ 2969 "The cutoff value for method invocation histogram (+CountCalls)") \ 2970 \ 2971 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2972 "Number of interpreted methods to show in profile") \ 2973 \ 2974 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2975 "Number of compiled methods to show in profile") \ 2976 \ 2977 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2978 "Number of stub methods to show in profile") \ 2979 \ 2980 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2981 "Number of runtime stub nodes to show in profile") \ 2982 \ 2983 product(intx, ProfileIntervalsTicks, 100, \ 2984 "Number of ticks between printing of interval profile " \ 2985 "(+ProfileIntervals)") \ 2986 \ 2987 notproduct(intx, ScavengeALotInterval, 1, \ 2988 "Interval between which scavenge will occur with +ScavengeALot") \ 2989 \ 2990 notproduct(intx, FullGCALotInterval, 1, \ 2991 "Interval between which full gc will occur with +FullGCALot") \ 2992 \ 2993 notproduct(intx, FullGCALotStart, 0, \ 2994 "For which invocation to start FullGCAlot") \ 2995 \ 2996 notproduct(intx, FullGCALotDummies, 32*K, \ 2997 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2998 "to move") \ 2999 \ 3000 develop(intx, DontYieldALotInterval, 10, \ 3001 "Interval between which yields will be dropped (milliseconds)") \ 3002 \ 3003 develop(intx, MinSleepInterval, 1, \ 3004 "Minimum sleep() interval (milliseconds) when " \ 3005 "ConvertSleepToYield is off (used for Solaris)") \ 3006 \ 3007 develop(intx, ProfilerPCTickThreshold, 15, \ 3008 "Number of ticks in a PC buckets to be a hotspot") \ 3009 \ 3010 notproduct(intx, DeoptimizeALotInterval, 5, \ 3011 "Number of exits until DeoptimizeALot kicks in") \ 3012 \ 3013 notproduct(intx, ZombieALotInterval, 5, \ 3014 "Number of exits until ZombieALot kicks in") \ 3015 \ 3016 develop(bool, StressNonEntrant, false, \ 3017 "Mark nmethods non-entrant at registration") \ 3018 \ 3019 diagnostic(intx, MallocVerifyInterval, 0, \ 3020 "If non-zero, verify C heap after every N calls to " \ 3021 "malloc/realloc/free") \ 3022 \ 3023 diagnostic(intx, MallocVerifyStart, 0, \ 3024 "If non-zero, start verifying C heap after Nth call to " \ 3025 "malloc/realloc/free") \ 3026 \ 3027 diagnostic(uintx, MallocMaxTestWords, 0, \ 3028 "If non-zero, maximum number of words that malloc/realloc can " \ 3029 "allocate (for testing only)") \ 3030 \ 3031 product(intx, TypeProfileWidth, 2, \ 3032 "Number of receiver types to record in call/cast profile") \ 3033 \ 3034 develop(intx, BciProfileWidth, 2, \ 3035 "Number of return bci's to record in ret profile") \ 3036 \ 3037 product(intx, PerMethodRecompilationCutoff, 400, \ 3038 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3039 \ 3040 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3041 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3042 \ 3043 product(intx, PerMethodTrapLimit, 100, \ 3044 "Limit on traps (of one kind) in a method (includes inlines)") \ 3045 \ 3046 product(intx, PerBytecodeTrapLimit, 4, \ 3047 "Limit on traps (of one kind) at a particular BCI") \ 3048 \ 3049 develop(intx, InlineFrequencyRatio, 20, \ 3050 "Ratio of call site execution to caller method invocation") \ 3051 \ 3052 develop_pd(intx, InlineFrequencyCount, \ 3053 "Count of call site execution necessary to trigger frequent " \ 3054 "inlining") \ 3055 \ 3056 develop(intx, InlineThrowCount, 50, \ 3057 "Force inlining of interpreted methods that throw this often") \ 3058 \ 3059 develop(intx, InlineThrowMaxSize, 200, \ 3060 "Force inlining of throwing methods smaller than this") \ 3061 \ 3062 develop(intx, ProfilerNodeSize, 1024, \ 3063 "Size in K to allocate for the Profile Nodes of each thread") \ 3064 \ 3065 product_pd(intx, PreInflateSpin, \ 3066 "Number of times to spin wait before inflation") \ 3067 \ 3068 /* gc parameters */ \ 3069 product(uintx, InitialHeapSize, 0, \ 3070 "Initial heap size (in bytes); zero means use ergonomics") \ 3071 \ 3072 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 3073 "Maximum heap size (in bytes)") \ 3074 \ 3075 product(uintx, OldSize, ScaleForWordSize(4*M), \ 3076 "Initial tenured generation size (in bytes)") \ 3077 \ 3078 product(uintx, NewSize, ScaleForWordSize(1*M), \ 3079 "Initial new generation size (in bytes)") \ 3080 \ 3081 product(uintx, MaxNewSize, max_uintx, \ 3082 "Maximum new generation size (in bytes), max_uintx means set " \ 3083 "ergonomically") \ 3084 \ 3085 product(uintx, PretenureSizeThreshold, 0, \ 3086 "Maximum size in bytes of objects allocated in DefNew " \ 3087 "generation; zero means no maximum") \ 3088 \ 3089 product(uintx, TLABSize, 0, \ 3090 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3091 \ 3092 product(uintx, MinTLABSize, 2*K, \ 3093 "Minimum allowed TLAB size (in bytes)") \ 3094 \ 3095 product(uintx, TLABAllocationWeight, 35, \ 3096 "Allocation averaging weight") \ 3097 \ 3098 product(uintx, TLABWasteTargetPercent, 1, \ 3099 "Percentage of Eden that can be wasted") \ 3100 \ 3101 product(uintx, TLABRefillWasteFraction, 64, \ 3102 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3103 \ 3104 product(uintx, TLABWasteIncrement, 4, \ 3105 "Increment allowed waste at slow allocation") \ 3106 \ 3107 product(uintx, SurvivorRatio, 8, \ 3108 "Ratio of eden/survivor space size") \ 3109 \ 3110 product(uintx, NewRatio, 2, \ 3111 "Ratio of old/new generation sizes") \ 3112 \ 3113 product_pd(uintx, NewSizeThreadIncrease, \ 3114 "Additional size added to desired new generation size per " \ 3115 "non-daemon thread (in bytes)") \ 3116 \ 3117 product_pd(uintx, MetaspaceSize, \ 3118 "Initial size of Metaspaces (in bytes)") \ 3119 \ 3120 product(uintx, MaxMetaspaceSize, max_uintx, \ 3121 "Maximum size of Metaspaces (in bytes)") \ 3122 \ 3123 product(uintx, CompressedClassSpaceSize, 1*G, \ 3124 "Maximum size of class area in Metaspace when compressed " \ 3125 "class pointers are used") \ 3126 \ 3127 product(uintx, MinHeapFreeRatio, 40, \ 3128 "The minimum percentage of heap free after GC to avoid expansion."\ 3129 " For most GCs this applies to the old generation. In G1 it" \ 3130 " applies to the whole heap. Not supported by ParallelGC.") \ 3131 \ 3132 product(uintx, MaxHeapFreeRatio, 70, \ 3133 "The maximum percentage of heap free after GC to avoid shrinking."\ 3134 " For most GCs this applies to the old generation. In G1 it" \ 3135 " applies to the whole heap. Not supported by ParallelGC.") \ 3136 \ 3137 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3138 "Number of milliseconds per MB of free space in the heap") \ 3139 \ 3140 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3141 "The minimum change in heap space due to GC (in bytes)") \ 3142 \ 3143 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3144 "The minimum expansion of Metaspace (in bytes)") \ 3145 \ 3146 product(uintx, MinMetaspaceFreeRatio, 40, \ 3147 "The minimum percentage of Metaspace free after GC to avoid " \ 3148 "expansion") \ 3149 \ 3150 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3151 "The maximum percentage of Metaspace free after GC to avoid " \ 3152 "shrinking") \ 3153 \ 3154 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3155 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3156 \ 3157 product(uintx, QueuedAllocationWarningCount, 0, \ 3158 "Number of times an allocation that queues behind a GC " \ 3159 "will retry before printing a warning") \ 3160 \ 3161 diagnostic(uintx, VerifyGCStartAt, 0, \ 3162 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3163 \ 3164 diagnostic(intx, VerifyGCLevel, 0, \ 3165 "Generation level at which to start +VerifyBefore/AfterGC") \ 3166 \ 3167 product(uintx, MaxTenuringThreshold, 15, \ 3168 "Maximum value for tenuring threshold") \ 3169 \ 3170 product(uintx, InitialTenuringThreshold, 7, \ 3171 "Initial value for tenuring threshold") \ 3172 \ 3173 product(uintx, TargetSurvivorRatio, 50, \ 3174 "Desired percentage of survivor space used after scavenge") \ 3175 \ 3176 product(uintx, MarkSweepDeadRatio, 5, \ 3177 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3178 "Serial mark sweep treats this as both the minimum and maximum " \ 3179 "value. " \ 3180 "CMS uses this value only if it falls back to mark sweep. " \ 3181 "Par compact uses a variable scale based on the density of the " \ 3182 "generation and treats this as the maximum value when the heap " \ 3183 "is either completely full or completely empty. Par compact " \ 3184 "also has a smaller default value; see arguments.cpp.") \ 3185 \ 3186 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3187 "How often should we fully compact the heap (ignoring the dead " \ 3188 "space parameters)") \ 3189 \ 3190 product(intx, PrintCMSStatistics, 0, \ 3191 "Statistics for CMS") \ 3192 \ 3193 product(bool, PrintCMSInitiationStatistics, false, \ 3194 "Statistics for initiating a CMS collection") \ 3195 \ 3196 product(intx, PrintFLSStatistics, 0, \ 3197 "Statistics for CMS' FreeListSpace") \ 3198 \ 3199 product(intx, PrintFLSCensus, 0, \ 3200 "Census for CMS' FreeListSpace") \ 3201 \ 3202 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3203 "Delay between expansion and allocation (in milliseconds)") \ 3204 \ 3205 develop(uintx, GCWorkerDelayMillis, 0, \ 3206 "Delay in scheduling GC workers (in milliseconds)") \ 3207 \ 3208 product(intx, DeferThrSuspendLoopCount, 4000, \ 3209 "(Unstable) Number of times to iterate in safepoint loop " \ 3210 "before blocking VM threads ") \ 3211 \ 3212 product(intx, DeferPollingPageLoopCount, -1, \ 3213 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3214 "before changing safepoint polling page to RO ") \ 3215 \ 3216 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3217 \ 3218 product(bool, PSChunkLargeArrays, true, \ 3219 "Process large arrays in chunks") \ 3220 \ 3221 product(uintx, GCDrainStackTargetSize, 64, \ 3222 "Number of entries we will try to leave on the stack " \ 3223 "during parallel gc") \ 3224 \ 3225 /* stack parameters */ \ 3226 product_pd(intx, StackYellowPages, \ 3227 "Number of yellow zone (recoverable overflows) pages") \ 3228 \ 3229 product_pd(intx, StackRedPages, \ 3230 "Number of red zone (unrecoverable overflows) pages") \ 3231 \ 3232 product_pd(intx, StackShadowPages, \ 3233 "Number of shadow zone (for overflow checking) pages " \ 3234 "this should exceed the depth of the VM and native call stack") \ 3235 \ 3236 product_pd(intx, ThreadStackSize, \ 3237 "Thread Stack Size (in Kbytes)") \ 3238 \ 3239 product_pd(intx, VMThreadStackSize, \ 3240 "Non-Java Thread Stack Size (in Kbytes)") \ 3241 \ 3242 product_pd(intx, CompilerThreadStackSize, \ 3243 "Compiler Thread Stack Size (in Kbytes)") \ 3244 \ 3245 develop_pd(uintx, JVMInvokeMethodSlack, \ 3246 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3247 \ 3248 product(uintx, ThreadSafetyMargin, 50*M, \ 3249 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3250 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3251 "disable this feature") \ 3252 \ 3253 /* code cache parameters */ \ 3254 develop(uintx, CodeCacheSegmentSize, 64, \ 3255 "Code cache segment size (in bytes) - smallest unit of " \ 3256 "allocation") \ 3257 \ 3258 develop_pd(intx, CodeEntryAlignment, \ 3259 "Code entry alignment for generated code (in bytes)") \ 3260 \ 3261 product_pd(intx, OptoLoopAlignment, \ 3262 "Align inner loops to zero relative to this modulus") \ 3263 \ 3264 product_pd(uintx, InitialCodeCacheSize, \ 3265 "Initial code cache size (in bytes)") \ 3266 \ 3267 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3268 "Minimum code cache size (in bytes) required to start VM.") \ 3269 \ 3270 product_pd(uintx, ReservedCodeCacheSize, \ 3271 "Reserved code cache size (in bytes) - maximum code cache size") \ 3272 \ 3273 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3274 "When less than X space left, we stop compiling") \ 3275 \ 3276 product_pd(uintx, CodeCacheExpansionSize, \ 3277 "Code cache expansion size (in bytes)") \ 3278 \ 3279 develop_pd(uintx, CodeCacheMinBlockLength, \ 3280 "Minimum number of segments in a code cache block") \ 3281 \ 3282 notproduct(bool, ExitOnFullCodeCache, false, \ 3283 "Exit the VM if we fill the code cache") \ 3284 \ 3285 product(bool, UseCodeCacheFlushing, true, \ 3286 "Attempt to clean the code cache before shutting off compiler") \ 3287 \ 3288 /* interpreter debugging */ \ 3289 develop(intx, BinarySwitchThreshold, 5, \ 3290 "Minimal number of lookupswitch entries for rewriting to binary " \ 3291 "switch") \ 3292 \ 3293 develop(intx, StopInterpreterAt, 0, \ 3294 "Stop interpreter execution at specified bytecode number") \ 3295 \ 3296 develop(intx, TraceBytecodesAt, 0, \ 3297 "Trace bytecodes starting with specified bytecode number") \ 3298 \ 3299 /* compiler interface */ \ 3300 develop(intx, CIStart, 0, \ 3301 "The id of the first compilation to permit") \ 3302 \ 3303 develop(intx, CIStop, -1, \ 3304 "The id of the last compilation to permit") \ 3305 \ 3306 develop(intx, CIStartOSR, 0, \ 3307 "The id of the first osr compilation to permit " \ 3308 "(CICountOSR must be on)") \ 3309 \ 3310 develop(intx, CIStopOSR, -1, \ 3311 "The id of the last osr compilation to permit " \ 3312 "(CICountOSR must be on)") \ 3313 \ 3314 develop(intx, CIBreakAtOSR, -1, \ 3315 "The id of osr compilation to break at") \ 3316 \ 3317 develop(intx, CIBreakAt, -1, \ 3318 "The id of compilation to break at") \ 3319 \ 3320 product(ccstrlist, CompileOnly, "", \ 3321 "List of methods (pkg/class.name) to restrict compilation to") \ 3322 \ 3323 product(ccstr, CompileCommandFile, NULL, \ 3324 "Read compiler commands from this file [.hotspot_compiler]") \ 3325 \ 3326 product(ccstrlist, CompileCommand, "", \ 3327 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3328 \ 3329 develop(bool, ReplayCompiles, false, \ 3330 "Enable replay of compilations from ReplayDataFile") \ 3331 \ 3332 product(ccstr, ReplayDataFile, NULL, \ 3333 "File containing compilation replay information" \ 3334 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3335 \ 3336 develop(intx, ReplaySuppressInitializers, 2, \ 3337 "Control handling of class initialization during replay: " \ 3338 "0 - don't do anything special; " \ 3339 "1 - treat all class initializers as empty; " \ 3340 "2 - treat class initializers for application classes as empty; " \ 3341 "3 - allow all class initializers to run during bootstrap but " \ 3342 " pretend they are empty after starting replay") \ 3343 \ 3344 develop(bool, ReplayIgnoreInitErrors, false, \ 3345 "Ignore exceptions thrown during initialization for replay") \ 3346 \ 3347 product(bool, DumpReplayDataOnError, true, \ 3348 "Record replay data for crashing compiler threads") \ 3349 \ 3350 product(bool, CICompilerCountPerCPU, false, \ 3351 "1 compiler thread for log(N CPUs)") \ 3352 \ 3353 develop(intx, CIFireOOMAt, -1, \ 3354 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3355 "(non-negative value throws OOM after this many CI accesses " \ 3356 "in each compile)") \ 3357 notproduct(intx, CICrashAt, -1, \ 3358 "id of compilation to trigger assert in compiler thread for " \ 3359 "the purpose of testing, e.g. generation of replay data") \ 3360 notproduct(bool, CIObjectFactoryVerify, false, \ 3361 "enable potentially expensive verification in ciObjectFactory") \ 3362 \ 3363 /* Priorities */ \ 3364 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3365 \ 3366 product(intx, ThreadPriorityPolicy, 0, \ 3367 "0 : Normal. "\ 3368 " VM chooses priorities that are appropriate for normal "\ 3369 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3370 " to normal native priority. Java priorities below " \ 3371 " NORM_PRIORITY map to lower native priority values. On "\ 3372 " Windows applications are allowed to use higher native "\ 3373 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3374 " not use the highest possible native priority, "\ 3375 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3376 " system threads. On Linux thread priorities are ignored "\ 3377 " because the OS does not support static priority in "\ 3378 " SCHED_OTHER scheduling class which is the only choice for "\ 3379 " non-root, non-realtime applications. "\ 3380 "1 : Aggressive. "\ 3381 " Java thread priorities map over to the entire range of "\ 3382 " native thread priorities. Higher Java thread priorities map "\ 3383 " to higher native thread priorities. This policy should be "\ 3384 " used with care, as sometimes it can cause performance "\ 3385 " degradation in the application and/or the entire system. On "\ 3386 " Linux this policy requires root privilege.") \ 3387 \ 3388 product(bool, ThreadPriorityVerbose, false, \ 3389 "Print priority changes") \ 3390 \ 3391 product(intx, DefaultThreadPriority, -1, \ 3392 "The native priority at which threads run if not elsewhere " \ 3393 "specified (-1 means no change)") \ 3394 \ 3395 product(intx, CompilerThreadPriority, -1, \ 3396 "The native priority at which compiler threads should run " \ 3397 "(-1 means no change)") \ 3398 \ 3399 product(intx, VMThreadPriority, -1, \ 3400 "The native priority at which the VM thread should run " \ 3401 "(-1 means no change)") \ 3402 \ 3403 product(bool, CompilerThreadHintNoPreempt, true, \ 3404 "(Solaris only) Give compiler threads an extra quanta") \ 3405 \ 3406 product(bool, VMThreadHintNoPreempt, false, \ 3407 "(Solaris only) Give VM thread an extra quanta") \ 3408 \ 3409 product(intx, JavaPriority1_To_OSPriority, -1, \ 3410 "Map Java priorities to OS priorities") \ 3411 \ 3412 product(intx, JavaPriority2_To_OSPriority, -1, \ 3413 "Map Java priorities to OS priorities") \ 3414 \ 3415 product(intx, JavaPriority3_To_OSPriority, -1, \ 3416 "Map Java priorities to OS priorities") \ 3417 \ 3418 product(intx, JavaPriority4_To_OSPriority, -1, \ 3419 "Map Java priorities to OS priorities") \ 3420 \ 3421 product(intx, JavaPriority5_To_OSPriority, -1, \ 3422 "Map Java priorities to OS priorities") \ 3423 \ 3424 product(intx, JavaPriority6_To_OSPriority, -1, \ 3425 "Map Java priorities to OS priorities") \ 3426 \ 3427 product(intx, JavaPriority7_To_OSPriority, -1, \ 3428 "Map Java priorities to OS priorities") \ 3429 \ 3430 product(intx, JavaPriority8_To_OSPriority, -1, \ 3431 "Map Java priorities to OS priorities") \ 3432 \ 3433 product(intx, JavaPriority9_To_OSPriority, -1, \ 3434 "Map Java priorities to OS priorities") \ 3435 \ 3436 product(intx, JavaPriority10_To_OSPriority,-1, \ 3437 "Map Java priorities to OS priorities") \ 3438 \ 3439 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3440 "Java thread priority 10 maps to critical scheduling priority") \ 3441 \ 3442 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3443 "Compiler thread(s) run at critical scheduling priority") \ 3444 \ 3445 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3446 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3447 \ 3448 /* compiler debugging */ \ 3449 notproduct(intx, CompileTheWorldStartAt, 1, \ 3450 "First class to consider when using +CompileTheWorld") \ 3451 \ 3452 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3453 "Last class to consider when using +CompileTheWorld") \ 3454 \ 3455 develop(intx, NewCodeParameter, 0, \ 3456 "Testing Only: Create a dedicated integer parameter before " \ 3457 "putback") \ 3458 \ 3459 /* new oopmap storage allocation */ \ 3460 develop(intx, MinOopMapAllocation, 8, \ 3461 "Minimum number of OopMap entries in an OopMapSet") \ 3462 \ 3463 /* Background Compilation */ \ 3464 develop(intx, LongCompileThreshold, 50, \ 3465 "Used with +TraceLongCompiles") \ 3466 \ 3467 product(intx, StarvationMonitorInterval, 200, \ 3468 "Pause between each check (in milliseconds)") \ 3469 \ 3470 /* recompilation */ \ 3471 product_pd(intx, CompileThreshold, \ 3472 "number of interpreted method invocations before (re-)compiling") \ 3473 \ 3474 product_pd(intx, BackEdgeThreshold, \ 3475 "Interpreter Back edge threshold at which an OSR compilation is " \ 3476 "invoked") \ 3477 \ 3478 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3479 "Interpreter (tier 0) invocation notification frequency") \ 3480 \ 3481 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3482 "C1 without MDO (tier 2) invocation notification frequency") \ 3483 \ 3484 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3485 "C1 with MDO profiling (tier 3) invocation notification " \ 3486 "frequency") \ 3487 \ 3488 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3489 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3490 \ 3491 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3492 "Interpreter (tier 0) invocation notification frequency") \ 3493 \ 3494 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3495 "C1 without MDO (tier 2) invocation notification frequency") \ 3496 \ 3497 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3498 "C1 with MDO profiling (tier 3) invocation notification " \ 3499 "frequency") \ 3500 \ 3501 product(intx, Tier2CompileThreshold, 0, \ 3502 "threshold at which tier 2 compilation is invoked") \ 3503 \ 3504 product(intx, Tier2BackEdgeThreshold, 0, \ 3505 "Back edge threshold at which tier 2 compilation is invoked") \ 3506 \ 3507 product(intx, Tier3InvocationThreshold, 200, \ 3508 "Compile if number of method invocations crosses this " \ 3509 "threshold") \ 3510 \ 3511 product(intx, Tier3MinInvocationThreshold, 100, \ 3512 "Minimum invocation to compile at tier 3") \ 3513 \ 3514 product(intx, Tier3CompileThreshold, 2000, \ 3515 "Threshold at which tier 3 compilation is invoked (invocation " \ 3516 "minimum must be satisfied") \ 3517 \ 3518 product(intx, Tier3BackEdgeThreshold, 60000, \ 3519 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3520 \ 3521 product(intx, Tier4InvocationThreshold, 5000, \ 3522 "Compile if number of method invocations crosses this " \ 3523 "threshold") \ 3524 \ 3525 product(intx, Tier4MinInvocationThreshold, 600, \ 3526 "Minimum invocation to compile at tier 4") \ 3527 \ 3528 product(intx, Tier4CompileThreshold, 15000, \ 3529 "Threshold at which tier 4 compilation is invoked (invocation " \ 3530 "minimum must be satisfied") \ 3531 \ 3532 product(intx, Tier4BackEdgeThreshold, 40000, \ 3533 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3534 \ 3535 product(intx, Tier3DelayOn, 5, \ 3536 "If C2 queue size grows over this amount per compiler thread " \ 3537 "stop compiling at tier 3 and start compiling at tier 2") \ 3538 \ 3539 product(intx, Tier3DelayOff, 2, \ 3540 "If C2 queue size is less than this amount per compiler thread " \ 3541 "allow methods compiled at tier 2 transition to tier 3") \ 3542 \ 3543 product(intx, Tier3LoadFeedback, 5, \ 3544 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3545 "reaches this amount per compiler thread") \ 3546 \ 3547 product(intx, Tier4LoadFeedback, 3, \ 3548 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3549 "reaches this amount per compiler thread") \ 3550 \ 3551 product(intx, TieredCompileTaskTimeout, 50, \ 3552 "Kill compile task if method was not used within " \ 3553 "given timeout in milliseconds") \ 3554 \ 3555 product(intx, TieredStopAtLevel, 4, \ 3556 "Stop at given compilation level") \ 3557 \ 3558 product(intx, Tier0ProfilingStartPercentage, 200, \ 3559 "Start profiling in interpreter if the counters exceed tier 3 " \ 3560 "thresholds by the specified percentage") \ 3561 \ 3562 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3563 "Increase the compile threshold for C1 compilation if the code " \ 3564 "cache is filled by the specified percentage") \ 3565 \ 3566 product(intx, TieredRateUpdateMinTime, 1, \ 3567 "Minimum rate sampling interval (in milliseconds)") \ 3568 \ 3569 product(intx, TieredRateUpdateMaxTime, 25, \ 3570 "Maximum rate sampling interval (in milliseconds)") \ 3571 \ 3572 product_pd(bool, TieredCompilation, \ 3573 "Enable tiered compilation") \ 3574 \ 3575 product(bool, PrintTieredEvents, false, \ 3576 "Print tiered events notifications") \ 3577 \ 3578 product_pd(intx, OnStackReplacePercentage, \ 3579 "NON_TIERED number of method invocations/branches (expressed as " \ 3580 "% of CompileThreshold) before (re-)compiling OSR code") \ 3581 \ 3582 product(intx, InterpreterProfilePercentage, 33, \ 3583 "NON_TIERED number of method invocations/branches (expressed as " \ 3584 "% of CompileThreshold) before profiling in the interpreter") \ 3585 \ 3586 develop(intx, MaxRecompilationSearchLength, 10, \ 3587 "The maximum number of frames to inspect when searching for " \ 3588 "recompilee") \ 3589 \ 3590 develop(intx, MaxInterpretedSearchLength, 3, \ 3591 "The maximum number of interpreted frames to skip when searching "\ 3592 "for recompilee") \ 3593 \ 3594 develop(intx, DesiredMethodLimit, 8000, \ 3595 "The desired maximum method size (in bytecodes) after inlining") \ 3596 \ 3597 develop(intx, HugeMethodLimit, 8000, \ 3598 "Don't compile methods larger than this if " \ 3599 "+DontCompileHugeMethods") \ 3600 \ 3601 /* New JDK 1.4 reflection implementation */ \ 3602 \ 3603 develop(bool, UseNewReflection, true, \ 3604 "Temporary flag for transition to reflection based on dynamic " \ 3605 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3606 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3607 "changes were needed") \ 3608 \ 3609 develop(bool, VerifyReflectionBytecodes, false, \ 3610 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3611 "in situations like that described in 4486457 or for " \ 3612 "constructors generated for serialization, so can not be enabled "\ 3613 "in product.") \ 3614 \ 3615 product(bool, ReflectionWrapResolutionErrors, true, \ 3616 "Temporary flag for transition to AbstractMethodError wrapped " \ 3617 "in InvocationTargetException. See 6531596") \ 3618 \ 3619 develop(bool, VerifyLambdaBytecodes, false, \ 3620 "Force verification of jdk 8 lambda metafactory bytecodes") \ 3621 \ 3622 develop(intx, FastSuperclassLimit, 8, \ 3623 "Depth of hardwired instanceof accelerator array") \ 3624 \ 3625 /* Properties for Java libraries */ \ 3626 \ 3627 product(uintx, MaxDirectMemorySize, 0, \ 3628 "Maximum total size of NIO direct-buffer allocations") \ 3629 \ 3630 /* temporary developer defined flags */ \ 3631 \ 3632 diagnostic(bool, UseNewCode, false, \ 3633 "Testing Only: Use the new version while testing") \ 3634 \ 3635 diagnostic(bool, UseNewCode2, false, \ 3636 "Testing Only: Use the new version while testing") \ 3637 \ 3638 diagnostic(bool, UseNewCode3, false, \ 3639 "Testing Only: Use the new version while testing") \ 3640 \ 3641 /* flags for performance data collection */ \ 3642 \ 3643 product(bool, UsePerfData, falseInEmbedded, \ 3644 "Flag to disable jvmstat instrumentation for performance testing "\ 3645 "and problem isolation purposes") \ 3646 \ 3647 product(bool, PerfDataSaveToFile, false, \ 3648 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3649 \ 3650 product(ccstr, PerfDataSaveFile, NULL, \ 3651 "Save PerfData memory to the specified absolute pathname. " \ 3652 "The string %p in the file name (if present) " \ 3653 "will be replaced by pid") \ 3654 \ 3655 product(intx, PerfDataSamplingInterval, 50, \ 3656 "Data sampling interval (in milliseconds)") \ 3657 \ 3658 develop(bool, PerfTraceDataCreation, false, \ 3659 "Trace creation of Performance Data Entries") \ 3660 \ 3661 develop(bool, PerfTraceMemOps, false, \ 3662 "Trace PerfMemory create/attach/detach calls") \ 3663 \ 3664 product(bool, PerfDisableSharedMem, false, \ 3665 "Store performance data in standard memory") \ 3666 \ 3667 product(intx, PerfDataMemorySize, 32*K, \ 3668 "Size of performance data memory region. Will be rounded " \ 3669 "up to a multiple of the native os page size.") \ 3670 \ 3671 product(intx, PerfMaxStringConstLength, 1024, \ 3672 "Maximum PerfStringConstant string length before truncation") \ 3673 \ 3674 product(bool, PerfAllowAtExitRegistration, false, \ 3675 "Allow registration of atexit() methods") \ 3676 \ 3677 product(bool, PerfBypassFileSystemCheck, false, \ 3678 "Bypass Win32 file system criteria checks (Windows Only)") \ 3679 \ 3680 product(intx, UnguardOnExecutionViolation, 0, \ 3681 "Unguard page and retry on no-execute fault (Win32 only) " \ 3682 "0=off, 1=conservative, 2=aggressive") \ 3683 \ 3684 /* Serviceability Support */ \ 3685 \ 3686 product(bool, ManagementServer, false, \ 3687 "Create JMX Management Server") \ 3688 \ 3689 product(bool, DisableAttachMechanism, false, \ 3690 "Disable mechanism that allows tools to attach to this VM") \ 3691 \ 3692 product(bool, StartAttachListener, false, \ 3693 "Always start Attach Listener at VM startup") \ 3694 \ 3695 manageable(bool, PrintConcurrentLocks, false, \ 3696 "Print java.util.concurrent locks in thread dump") \ 3697 \ 3698 product(bool, TransmitErrorReport, false, \ 3699 "Enable error report transmission on erroneous termination") \ 3700 \ 3701 product(ccstr, ErrorReportServer, NULL, \ 3702 "Override built-in error report server address") \ 3703 \ 3704 /* Shared spaces */ \ 3705 \ 3706 product(bool, UseSharedSpaces, true, \ 3707 "Use shared spaces for metadata") \ 3708 \ 3709 product(bool, RequireSharedSpaces, false, \ 3710 "Require shared spaces for metadata") \ 3711 \ 3712 product(bool, DumpSharedSpaces, false, \ 3713 "Special mode: JVM reads a class list, loads classes, builds " \ 3714 "shared spaces, and dumps the shared spaces to a file to be " \ 3715 "used in future JVM runs") \ 3716 \ 3717 product(bool, PrintSharedSpaces, false, \ 3718 "Print usage of shared spaces") \ 3719 \ 3720 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3721 "Size of read-write space for metadata (in bytes)") \ 3722 \ 3723 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3724 "Size of read-only space for metadata (in bytes)") \ 3725 \ 3726 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3727 "Size of the shared miscellaneous data area (in bytes)") \ 3728 \ 3729 product(uintx, SharedMiscCodeSize, 120*K, \ 3730 "Size of the shared miscellaneous code area (in bytes)") \ 3731 \ 3732 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 3733 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3734 "Address to allocate shared memory region for class data") \ 3735 \ 3736 diagnostic(bool, EnableInvokeDynamic, true, \ 3737 "support JSR 292 (method handles, invokedynamic, " \ 3738 "anonymous classes") \ 3739 \ 3740 diagnostic(bool, PrintMethodHandleStubs, false, \ 3741 "Print generated stub code for method handles") \ 3742 \ 3743 develop(bool, TraceMethodHandles, false, \ 3744 "trace internal method handle operations") \ 3745 \ 3746 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3747 "perform extra checks when constructing method handles") \ 3748 \ 3749 diagnostic(bool, ShowHiddenFrames, false, \ 3750 "show method handle implementation frames (usually hidden)") \ 3751 \ 3752 experimental(bool, TrustFinalNonStaticFields, false, \ 3753 "trust final non-static declarations for constant folding") \ 3754 \ 3755 experimental(bool, FoldStableValues, false, \ 3756 "Private flag to control optimizations for stable variables") \ 3757 \ 3758 develop(bool, TraceInvokeDynamic, false, \ 3759 "trace internal invoke dynamic operations") \ 3760 \ 3761 diagnostic(bool, PauseAtStartup, false, \ 3762 "Causes the VM to pause at startup time and wait for the pause " \ 3763 "file to be removed (default: ./vm.paused.<pid>)") \ 3764 \ 3765 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3766 "The file to create and for whose removal to await when pausing " \ 3767 "at startup. (default: ./vm.paused.<pid>)") \ 3768 \ 3769 diagnostic(bool, PauseAtExit, false, \ 3770 "Pause and wait for keypress on exit if a debugger is attached") \ 3771 \ 3772 product(bool, ExtendedDTraceProbes, false, \ 3773 "Enable performance-impacting dtrace probes") \ 3774 \ 3775 product(bool, DTraceMethodProbes, false, \ 3776 "Enable dtrace probes for method-entry and method-exit") \ 3777 \ 3778 product(bool, DTraceAllocProbes, false, \ 3779 "Enable dtrace probes for object allocation") \ 3780 \ 3781 product(bool, DTraceMonitorProbes, false, \ 3782 "Enable dtrace probes for monitor events") \ 3783 \ 3784 product(bool, RelaxAccessControlCheck, false, \ 3785 "Relax the access control checks in the verifier") \ 3786 \ 3787 diagnostic(bool, PrintDTraceDOF, false, \ 3788 "Print the DTrace DOF passed to the system for JSDT probes") \ 3789 \ 3790 product(uintx, StringTableSize, defaultStringTableSize, \ 3791 "Number of buckets in the interned String table") \ 3792 \ 3793 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 3794 "Number of buckets in the JVM internal Symbol table") \ 3795 \ 3796 develop(bool, TraceDefaultMethods, false, \ 3797 "Trace the default method processing steps") \ 3798 \ 3799 develop(bool, VerifyGenericSignatures, false, \ 3800 "Abort VM on erroneous or inconsistent generic signatures") \ 3801 \ 3802 product(bool, UseVMInterruptibleIO, false, \ 3803 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3804 "EINTR for I/O operations results in OS_INTRPT. The default " \ 3805 "value of this flag is true for JDK 6 and earlier") \ 3806 \ 3807 diagnostic(bool, WhiteBoxAPI, false, \ 3808 "Enable internal testing APIs") \ 3809 \ 3810 product(bool, PrintGCCause, true, \ 3811 "Include GC cause in GC logging") \ 3812 \ 3813 product(bool , AllowNonVirtualCalls, false, \ 3814 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 3815 \ 3816 diagnostic(ccstr, SharedArchiveFile, NULL, \ 3817 "Override the default location of the CDS archive file") \ 3818 \ 3819 experimental(uintx, ArrayAllocatorMallocLimit, \ 3820 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \ 3821 "Allocation less than this value will be allocated " \ 3822 "using malloc. Larger allocations will use mmap.") \ 3823 \ 3824 product(bool, EnableTracing, false, \ 3825 "Enable event-based tracing") \ 3826 \ 3827 product(bool, UseLockedTracing, false, \ 3828 "Use locked-tracing when doing event-based tracing") 3829 3830 3831/* 3832 * Macros for factoring of globals 3833 */ 3834 3835// Interface macros 3836#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3837#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3838#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3839#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3840#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3841#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3842#ifdef PRODUCT 3843#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value; 3844#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name; 3845#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name; 3846#else 3847#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3848#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3849#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3850#endif 3851// Special LP64 flags, product only needed for now. 3852#ifdef _LP64 3853#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3854#else 3855#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3856#endif // _LP64 3857 3858// Implementation macros 3859#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3860#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3861#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3862#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3863#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3864#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3865#ifdef PRODUCT 3866#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value; 3867#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name; 3868#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value; 3869#else 3870#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3871#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3872#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3873#endif 3874#ifdef _LP64 3875#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3876#else 3877#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3878#endif // _LP64 3879 3880RUNTIME_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) 3881 3882RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3883 3884ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3885 3886// Extensions 3887 3888#include "runtime/globals_ext.hpp" 3889 3890#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3891