globals.hpp revision 4244:a252e688abcf
126236Swpaul/* 226236Swpaul * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 326236Swpaul * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 426236Swpaul * 526236Swpaul * This code is free software; you can redistribute it and/or modify it 626236Swpaul * under the terms of the GNU General Public License version 2 only, as 726236Swpaul * published by the Free Software Foundation. 826236Swpaul * 926236Swpaul * This code is distributed in the hope that it will be useful, but WITHOUT 1026236Swpaul * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1126236Swpaul * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1226236Swpaul * version 2 for more details (a copy is included in the LICENSE file that 1326236Swpaul * accompanied this code). 1426236Swpaul * 1526236Swpaul * You should have received a copy of the GNU General Public License version 1626236Swpaul * 2 along with this work; if not, write to the Free Software Foundation, 1726236Swpaul * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1826236Swpaul * 1926236Swpaul * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2026236Swpaul * or visit www.oracle.com if you need additional information or have any 2126236Swpaul * questions. 2226236Swpaul * 2326236Swpaul */ 2426236Swpaul 2526236Swpaul#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 2626236Swpaul#define SHARE_VM_RUNTIME_GLOBALS_HPP 2726236Swpaul 2826236Swpaul#include "utilities/debug.hpp" 2926236Swpaul 3026236Swpaul// use this for flags that are true per default in the tiered build 3126236Swpaul// but false in non-tiered builds, and vice versa 3226236Swpaul#ifdef TIERED 33114601Sobrien#define trueInTiered true 34114601Sobrien#define falseInTiered false 3530378Scharnier#else 3626236Swpaul#define trueInTiered false 3726236Swpaul#define falseInTiered true 38228679Sdim#endif 3926236Swpaul 40129658Sstefanf#ifdef TARGET_ARCH_x86 4126236Swpaul# include "globals_x86.hpp" 4226236Swpaul#endif 4326236Swpaul#ifdef TARGET_ARCH_sparc 4426236Swpaul# include "globals_sparc.hpp" 4526236Swpaul#endif 4626236Swpaul#ifdef TARGET_ARCH_zero 4726236Swpaul# include "globals_zero.hpp" 4826236Swpaul#endif 4926236Swpaul#ifdef TARGET_ARCH_arm 5026236Swpaul# include "globals_arm.hpp" 5190298Sdes#endif 5290298Sdes#ifdef TARGET_ARCH_ppc 5326236Swpaul# include "globals_ppc.hpp" 5426236Swpaul#endif 5526236Swpaul#ifdef TARGET_OS_FAMILY_linux 5690297Sdes# include "globals_linux.hpp" 5726236Swpaul#endif 5879452Sbrian#ifdef TARGET_OS_FAMILY_solaris 5926236Swpaul# include "globals_solaris.hpp" 6026236Swpaul#endif 6126236Swpaul#ifdef TARGET_OS_FAMILY_windows 6226236Swpaul# include "globals_windows.hpp" 6326236Swpaul#endif 6426236Swpaul#ifdef TARGET_OS_FAMILY_bsd 6526236Swpaul# include "globals_bsd.hpp" 6626236Swpaul#endif 6726236Swpaul#ifdef TARGET_OS_ARCH_linux_x86 6826236Swpaul# include "globals_linux_x86.hpp" 6926236Swpaul#endif 7026236Swpaul#ifdef TARGET_OS_ARCH_linux_sparc 7126236Swpaul# include "globals_linux_sparc.hpp" 7226236Swpaul#endif 7326236Swpaul#ifdef TARGET_OS_ARCH_linux_zero 7426236Swpaul# include "globals_linux_zero.hpp" 7590298Sdes#endif 7690298Sdes#ifdef TARGET_OS_ARCH_solaris_x86 7790298Sdes# include "globals_solaris_x86.hpp" 7826236Swpaul#endif 7926236Swpaul#ifdef TARGET_OS_ARCH_solaris_sparc 8026236Swpaul# include "globals_solaris_sparc.hpp" 8126236Swpaul#endif 8226236Swpaul#ifdef TARGET_OS_ARCH_windows_x86 8326236Swpaul# include "globals_windows_x86.hpp" 8426236Swpaul#endif 8526236Swpaul#ifdef TARGET_OS_ARCH_linux_arm 8626236Swpaul# include "globals_linux_arm.hpp" 8726236Swpaul#endif 8826236Swpaul#ifdef TARGET_OS_ARCH_linux_ppc 8926236Swpaul# include "globals_linux_ppc.hpp" 9026236Swpaul#endif 9126236Swpaul#ifdef TARGET_OS_ARCH_bsd_x86 9226236Swpaul# include "globals_bsd_x86.hpp" 9326236Swpaul#endif 9426236Swpaul#ifdef TARGET_OS_ARCH_bsd_zero 9526236Swpaul# include "globals_bsd_zero.hpp" 9626236Swpaul#endif 9726236Swpaul#ifdef COMPILER1 9826236Swpaul#ifdef TARGET_ARCH_x86 9926236Swpaul# include "c1_globals_x86.hpp" 10090297Sdes#endif 10126236Swpaul#ifdef TARGET_ARCH_sparc 10226236Swpaul# include "c1_globals_sparc.hpp" 10326236Swpaul#endif 10426236Swpaul#ifdef TARGET_ARCH_arm 10526236Swpaul# include "c1_globals_arm.hpp" 10626236Swpaul#endif 10726236Swpaul#ifdef TARGET_ARCH_ppc 10826236Swpaul# include "c1_globals_ppc.hpp" 10926236Swpaul#endif 11026236Swpaul#ifdef TARGET_OS_FAMILY_linux 11126236Swpaul# include "c1_globals_linux.hpp" 11226236Swpaul#endif 11326236Swpaul#ifdef TARGET_OS_FAMILY_solaris 11426236Swpaul# include "c1_globals_solaris.hpp" 11526236Swpaul#endif 11626236Swpaul#ifdef TARGET_OS_FAMILY_windows 11726236Swpaul# include "c1_globals_windows.hpp" 11826236Swpaul#endif 11926236Swpaul#ifdef TARGET_OS_FAMILY_bsd 12026236Swpaul# include "c1_globals_bsd.hpp" 12126236Swpaul#endif 12226236Swpaul#endif 12326236Swpaul#ifdef COMPILER2 12426236Swpaul#ifdef TARGET_ARCH_x86 12526236Swpaul# include "c2_globals_x86.hpp" 12626236Swpaul#endif 12726236Swpaul#ifdef TARGET_ARCH_sparc 12826236Swpaul# include "c2_globals_sparc.hpp" 12926236Swpaul#endif 13026236Swpaul#ifdef TARGET_ARCH_arm 13126236Swpaul# include "c2_globals_arm.hpp" 13226236Swpaul#endif 13326236Swpaul#ifdef TARGET_OS_FAMILY_linux 134228680Sdim# include "c2_globals_linux.hpp" 13526236Swpaul#endif 13626236Swpaul#ifdef TARGET_OS_FAMILY_solaris 13726236Swpaul# include "c2_globals_solaris.hpp" 13826236Swpaul#endif 13926236Swpaul#ifdef TARGET_OS_FAMILY_windows 14026236Swpaul# include "c2_globals_windows.hpp" 14126236Swpaul#endif 14226236Swpaul#ifdef TARGET_OS_FAMILY_bsd 14326236Swpaul# include "c2_globals_bsd.hpp" 14426236Swpaul#endif 14526236Swpaul#endif 14626236Swpaul#ifdef SHARK 14726236Swpaul#ifdef TARGET_ARCH_zero 148# include "shark_globals_zero.hpp" 149#endif 150#endif 151 152#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 153define_pd_global(bool, BackgroundCompilation, false); 154define_pd_global(bool, UseTLAB, false); 155define_pd_global(bool, CICompileOSR, false); 156define_pd_global(bool, UseTypeProfile, false); 157define_pd_global(bool, UseOnStackReplacement, false); 158define_pd_global(bool, InlineIntrinsics, false); 159define_pd_global(bool, PreferInterpreterNativeStubs, true); 160define_pd_global(bool, ProfileInterpreter, false); 161define_pd_global(bool, ProfileTraps, false); 162define_pd_global(bool, TieredCompilation, false); 163 164define_pd_global(intx, CompileThreshold, 0); 165define_pd_global(intx, BackEdgeThreshold, 0); 166 167define_pd_global(intx, OnStackReplacePercentage, 0); 168define_pd_global(bool, ResizeTLAB, false); 169define_pd_global(intx, FreqInlineSize, 0); 170define_pd_global(intx, InlineSmallCode, 0); 171define_pd_global(intx, NewSizeThreadIncrease, 4*K); 172define_pd_global(intx, InlineClassNatives, true); 173define_pd_global(intx, InlineUnsafeOps, true); 174define_pd_global(intx, InitialCodeCacheSize, 160*K); 175define_pd_global(intx, ReservedCodeCacheSize, 32*M); 176define_pd_global(intx, CodeCacheExpansionSize, 32*K); 177define_pd_global(intx, CodeCacheMinBlockLength, 1); 178define_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 179define_pd_global(bool, NeverActAsServerClassMachine, true); 180define_pd_global(uint64_t,MaxRAM, 1ULL*G); 181#define CI_COMPILER_COUNT 0 182#else 183 184#ifdef COMPILER2 185#define CI_COMPILER_COUNT 2 186#else 187#define CI_COMPILER_COUNT 1 188#endif // COMPILER2 189 190#endif // no compilers 191 192// string type aliases used only in this file 193typedef const char* ccstr; 194typedef const char* ccstrlist; // represents string arguments which accumulate 195 196enum FlagValueOrigin { 197 DEFAULT = 0, 198 COMMAND_LINE = 1, 199 ENVIRON_VAR = 2, 200 CONFIG_FILE = 3, 201 MANAGEMENT = 4, 202 ERGONOMIC = 5, 203 ATTACH_ON_DEMAND = 6, 204 INTERNAL = 99 205}; 206 207struct Flag { 208 const char *type; 209 const char *name; 210 void* addr; 211 212 NOT_PRODUCT(const char *doc;) 213 214 const char *kind; 215 FlagValueOrigin origin; 216 217 // points to all Flags static array 218 static Flag *flags; 219 220 // number of flags 221 static size_t numFlags; 222 223 static Flag* find_flag(char* name, size_t length, bool allow_locked = false); 224 225 bool is_bool() const { return strcmp(type, "bool") == 0; } 226 bool get_bool() const { return *((bool*) addr); } 227 void set_bool(bool value) { *((bool*) addr) = value; } 228 229 bool is_intx() const { return strcmp(type, "intx") == 0; } 230 intx get_intx() const { return *((intx*) addr); } 231 void set_intx(intx value) { *((intx*) addr) = value; } 232 233 bool is_uintx() const { return strcmp(type, "uintx") == 0; } 234 uintx get_uintx() const { return *((uintx*) addr); } 235 void set_uintx(uintx value) { *((uintx*) addr) = value; } 236 237 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 238 uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 239 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 240 241 bool is_double() const { return strcmp(type, "double") == 0; } 242 double get_double() const { return *((double*) addr); } 243 void set_double(double value) { *((double*) addr) = value; } 244 245 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 246 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 247 ccstr get_ccstr() const { return *((ccstr*) addr); } 248 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 249 250 bool is_unlocker() const; 251 bool is_unlocked() const; 252 bool is_writeable() const; 253 bool is_external() const; 254 255 bool is_unlocker_ext() const; 256 bool is_unlocked_ext() const; 257 bool is_writeable_ext() const; 258 bool is_external_ext() const; 259 260 void get_locked_message(char*, int) const; 261 void get_locked_message_ext(char*, int) const; 262 263 void print_on(outputStream* st, bool withComments = false ); 264 void print_as_flag(outputStream* st); 265}; 266 267// debug flags control various aspects of the VM and are global accessible 268 269// use FlagSetting to temporarily change some debug flag 270// e.g. FlagSetting fs(DebugThisAndThat, true); 271// restored to previous value upon leaving scope 272class FlagSetting { 273 bool val; 274 bool* flag; 275 public: 276 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 277 ~FlagSetting() { *flag = val; } 278}; 279 280 281class CounterSetting { 282 intx* counter; 283 public: 284 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 285 ~CounterSetting() { (*counter)--; } 286}; 287 288 289class IntFlagSetting { 290 intx val; 291 intx* flag; 292 public: 293 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 294 ~IntFlagSetting() { *flag = val; } 295}; 296 297 298class DoubleFlagSetting { 299 double val; 300 double* flag; 301 public: 302 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 303 ~DoubleFlagSetting() { *flag = val; } 304}; 305 306 307class CommandLineFlags { 308 public: 309 static bool boolAt(char* name, size_t len, bool* value); 310 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 311 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 312 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 313 314 static bool intxAt(char* name, size_t len, intx* value); 315 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 316 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 317 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 318 319 static bool uintxAt(char* name, size_t len, uintx* value); 320 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 321 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 322 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 323 324 static bool uint64_tAt(char* name, size_t len, uint64_t* value); 325 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 326 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 327 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 328 329 static bool doubleAt(char* name, size_t len, double* value); 330 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 331 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 332 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 333 334 static bool ccstrAt(char* name, size_t len, ccstr* value); 335 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 336 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 337 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 338 339 // Returns false if name is not a command line flag. 340 static bool wasSetOnCmdline(const char* name, bool* value); 341 static void printSetFlags(outputStream* out); 342 343 static void printFlags(outputStream* out, bool withComments); 344 345 static void verify() PRODUCT_RETURN; 346}; 347 348// use this for flags that are true by default in the debug version but 349// false in the optimized version, and vice versa 350#ifdef ASSERT 351#define trueInDebug true 352#define falseInDebug false 353#else 354#define trueInDebug false 355#define falseInDebug true 356#endif 357 358// use this for flags that are true per default in the product build 359// but false in development builds, and vice versa 360#ifdef PRODUCT 361#define trueInProduct true 362#define falseInProduct false 363#else 364#define trueInProduct false 365#define falseInProduct true 366#endif 367 368#ifdef JAVASE_EMBEDDED 369#define falseInEmbedded false 370#else 371#define falseInEmbedded true 372#endif 373 374// develop flags are settable / visible only during development and are constant in the PRODUCT version 375// product flags are always settable / visible 376// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 377 378// A flag must be declared with one of the following types: 379// bool, intx, uintx, ccstr. 380// The type "ccstr" is an alias for "const char*" and is used 381// only in this file, because the macrology requires single-token type names. 382 383// Note: Diagnostic options not meant for VM tuning or for product modes. 384// They are to be used for VM quality assurance or field diagnosis 385// of VM bugs. They are hidden so that users will not be encouraged to 386// try them as if they were VM ordinary execution options. However, they 387// are available in the product version of the VM. Under instruction 388// from support engineers, VM customers can turn them on to collect 389// diagnostic information about VM problems. To use a VM diagnostic 390// option, you must first specify +UnlockDiagnosticVMOptions. 391// (This master switch also affects the behavior of -Xprintflags.) 392// 393// experimental flags are in support of features that are not 394// part of the officially supported product, but are available 395// for experimenting with. They could, for example, be performance 396// features that may not have undergone full or rigorous QA, but which may 397// help performance in some cases and released for experimentation 398// by the community of users and developers. This flag also allows one to 399// be able to build a fully supported product that nonetheless also 400// ships with some unsupported, lightly tested, experimental features. 401// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 402// UnlockExperimentalVMOptions flag, which allows the control and 403// modification of the experimental flags. 404// 405// Nota bene: neither diagnostic nor experimental options should be used casually, 406// and they are not supported on production loads, except under explicit 407// direction from support engineers. 408// 409// manageable flags are writeable external product flags. 410// They are dynamically writeable through the JDK management interface 411// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 412// These flags are external exported interface (see CCC). The list of 413// manageable flags can be queried programmatically through the management 414// interface. 415// 416// A flag can be made as "manageable" only if 417// - the flag is defined in a CCC as an external exported interface. 418// - the VM implementation supports dynamic setting of the flag. 419// This implies that the VM must *always* query the flag variable 420// and not reuse state related to the flag state at any given time. 421// - you want the flag to be queried programmatically by the customers. 422// 423// product_rw flags are writeable internal product flags. 424// They are like "manageable" flags but for internal/private use. 425// The list of product_rw flags are internal/private flags which 426// may be changed/removed in a future release. It can be set 427// through the management interface to get/set value 428// when the name of flag is supplied. 429// 430// A flag can be made as "product_rw" only if 431// - the VM implementation supports dynamic setting of the flag. 432// This implies that the VM must *always* query the flag variable 433// and not reuse state related to the flag state at any given time. 434// 435// Note that when there is a need to support develop flags to be writeable, 436// it can be done in the same way as product_rw. 437 438#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 439 \ 440 lp64_product(bool, UseCompressedOops, false, \ 441 "Use 32-bit object references in 64-bit VM " \ 442 "lp64_product means flag is always constant in 32 bit VM") \ 443 \ 444 lp64_product(bool, UseCompressedKlassPointers, false, \ 445 "Use 32-bit klass pointers in 64-bit VM " \ 446 "lp64_product means flag is always constant in 32 bit VM") \ 447 \ 448 notproduct(bool, CheckCompressedOops, true, \ 449 "generate checks in encoding/decoding code in debug VM") \ 450 \ 451 product_pd(uintx, HeapBaseMinAddress, \ 452 "OS specific low limit for heap base address") \ 453 \ 454 diagnostic(bool, PrintCompressedOopsMode, false, \ 455 "Print compressed oops base address and encoding mode") \ 456 \ 457 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 458 "Default object alignment in bytes, 8 is minimum") \ 459 \ 460 /* UseMembar is theoretically a temp flag used for memory barrier \ 461 * removal testing. It was supposed to be removed before FCS but has \ 462 * been re-added (see 6401008) */ \ 463 product_pd(bool, UseMembar, \ 464 "(Unstable) Issues membars on thread state transitions") \ 465 \ 466 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 467 * that don't support it. This will be replaced by processor detection \ 468 * logic. \ 469 */ \ 470 product(bool, UsePPCLWSYNC, true, \ 471 "Use lwsync instruction if true, else use slower sync") \ 472 \ 473 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 474 "Whether to clean the chunk pool asynchronously") \ 475 \ 476 /* Temporary: See 6948537 */ \ 477 experimental(bool, UseMemSetInBOT, true, \ 478 "(Unstable) uses memset in BOT updates in GC code") \ 479 \ 480 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 481 "Enable normal processing of flags relating to field diagnostics")\ 482 \ 483 experimental(bool, UnlockExperimentalVMOptions, false, \ 484 "Enable normal processing of flags relating to experimental features")\ 485 \ 486 product(bool, JavaMonitorsInStackTrace, true, \ 487 "Print info. about Java monitor locks when the stacks are dumped")\ 488 \ 489 product_pd(bool, UseLargePages, \ 490 "Use large page memory") \ 491 \ 492 product_pd(bool, UseLargePagesIndividualAllocation, \ 493 "Allocate large pages individually for better affinity") \ 494 \ 495 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 496 "Fail large pages individual allocation") \ 497 \ 498 develop(bool, TracePageSizes, false, \ 499 "Trace page size selection and usage.") \ 500 \ 501 product(bool, UseNUMA, false, \ 502 "Use NUMA if available") \ 503 \ 504 product(bool, UseNUMAInterleaving, false, \ 505 "Interleave memory across NUMA nodes if available") \ 506 \ 507 product(uintx, NUMAInterleaveGranularity, 2*M, \ 508 "Granularity to use for NUMA interleaving on Windows OS") \ 509 \ 510 product(bool, ForceNUMA, false, \ 511 "Force NUMA optimizations on single-node/UMA systems") \ 512 \ 513 product(intx, NUMAChunkResizeWeight, 20, \ 514 "Percentage (0-100) used to weight the current sample when " \ 515 "computing exponentially decaying average for " \ 516 "AdaptiveNUMAChunkSizing") \ 517 \ 518 product(intx, NUMASpaceResizeRate, 1*G, \ 519 "Do not reallocate more that this amount per collection") \ 520 \ 521 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 522 "Enable adaptive chunk sizing for NUMA") \ 523 \ 524 product(bool, NUMAStats, false, \ 525 "Print NUMA stats in detailed heap information") \ 526 \ 527 product(intx, NUMAPageScanRate, 256, \ 528 "Maximum number of pages to include in the page scan procedure") \ 529 \ 530 product_pd(bool, NeedsDeoptSuspend, \ 531 "True for register window machines (sparc/ia64)") \ 532 \ 533 product(intx, UseSSE, 99, \ 534 "Highest supported SSE instructions set on x86/x64") \ 535 \ 536 product(bool, UseAES, false, \ 537 "Control whether AES instructions can be used on x86/x64") \ 538 \ 539 product(uintx, LargePageSizeInBytes, 0, \ 540 "Large page size (0 to let VM choose the page size") \ 541 \ 542 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 543 "Use large pages if max heap is at least this big") \ 544 \ 545 product(bool, ForceTimeHighResolution, false, \ 546 "Using high time resolution(For Win32 only)") \ 547 \ 548 develop(bool, TraceItables, false, \ 549 "Trace initialization and use of itables") \ 550 \ 551 develop(bool, TracePcPatching, false, \ 552 "Trace usage of frame::patch_pc") \ 553 \ 554 develop(bool, TraceJumps, false, \ 555 "Trace assembly jumps in thread ring buffer") \ 556 \ 557 develop(bool, TraceRelocator, false, \ 558 "Trace the bytecode relocator") \ 559 \ 560 develop(bool, TraceLongCompiles, false, \ 561 "Print out every time compilation is longer than " \ 562 "a given threashold") \ 563 \ 564 develop(bool, SafepointALot, false, \ 565 "Generates a lot of safepoints. Works with " \ 566 "GuaranteedSafepointInterval") \ 567 \ 568 product_pd(bool, BackgroundCompilation, \ 569 "A thread requesting compilation is not blocked during " \ 570 "compilation") \ 571 \ 572 product(bool, PrintVMQWaitTime, false, \ 573 "Prints out the waiting time in VM operation queue") \ 574 \ 575 develop(bool, NoYieldsInMicrolock, false, \ 576 "Disable yields in microlock") \ 577 \ 578 develop(bool, TraceOopMapGeneration, false, \ 579 "Shows oopmap generation") \ 580 \ 581 product(bool, MethodFlushing, true, \ 582 "Reclamation of zombie and not-entrant methods") \ 583 \ 584 develop(bool, VerifyStack, false, \ 585 "Verify stack of each thread when it is entering a runtime call") \ 586 \ 587 diagnostic(bool, ForceUnreachable, false, \ 588 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 589 \ 590 notproduct(bool, StressDerivedPointers, false, \ 591 "Force scavenge when a derived pointers is detected on stack " \ 592 "after rtm call") \ 593 \ 594 develop(bool, TraceDerivedPointers, false, \ 595 "Trace traversal of derived pointers on stack") \ 596 \ 597 notproduct(bool, TraceCodeBlobStacks, false, \ 598 "Trace stack-walk of codeblobs") \ 599 \ 600 product(bool, PrintJNIResolving, false, \ 601 "Used to implement -v:jni") \ 602 \ 603 notproduct(bool, PrintRewrites, false, \ 604 "Print methods that are being rewritten") \ 605 \ 606 product(bool, UseInlineCaches, true, \ 607 "Use Inline Caches for virtual calls ") \ 608 \ 609 develop(bool, InlineArrayCopy, true, \ 610 "inline arraycopy native that is known to be part of " \ 611 "base library DLL") \ 612 \ 613 develop(bool, InlineObjectHash, true, \ 614 "inline Object::hashCode() native that is known to be part " \ 615 "of base library DLL") \ 616 \ 617 develop(bool, InlineNatives, true, \ 618 "inline natives that are known to be part of base library DLL") \ 619 \ 620 develop(bool, InlineMathNatives, true, \ 621 "inline SinD, CosD, etc.") \ 622 \ 623 develop(bool, InlineClassNatives, true, \ 624 "inline Class.isInstance, etc") \ 625 \ 626 develop(bool, InlineThreadNatives, true, \ 627 "inline Thread.currentThread, etc") \ 628 \ 629 develop(bool, InlineUnsafeOps, true, \ 630 "inline memory ops (native methods) from sun.misc.Unsafe") \ 631 \ 632 product(bool, CriticalJNINatives, true, \ 633 "check for critical JNI entry points") \ 634 \ 635 notproduct(bool, StressCriticalJNINatives, false, \ 636 "Exercise register saving code in critical natives") \ 637 \ 638 product(bool, UseSSE42Intrinsics, false, \ 639 "SSE4.2 versions of intrinsics") \ 640 \ 641 product(bool, UseAESIntrinsics, false, \ 642 "use intrinsics for AES versions of crypto") \ 643 \ 644 develop(bool, TraceCallFixup, false, \ 645 "traces all call fixups") \ 646 \ 647 develop(bool, DeoptimizeALot, false, \ 648 "deoptimize at every exit from the runtime system") \ 649 \ 650 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 651 "a comma separated list of bcis to deoptimize at") \ 652 \ 653 product(bool, DeoptimizeRandom, false, \ 654 "deoptimize random frames on random exit from the runtime system")\ 655 \ 656 notproduct(bool, ZombieALot, false, \ 657 "creates zombies (non-entrant) at exit from the runt. system") \ 658 \ 659 product(bool, UnlinkSymbolsALot, false, \ 660 "unlink unreferenced symbols from the symbol table at safepoints")\ 661 \ 662 notproduct(bool, WalkStackALot, false, \ 663 "trace stack (no print) at every exit from the runtime system") \ 664 \ 665 product(bool, Debugging, false, \ 666 "set when executing debug methods in debug.ccp " \ 667 "(to prevent triggering assertions)") \ 668 \ 669 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 670 "Enable strict checks that safepoints cannot happen for threads " \ 671 "that used No_Safepoint_Verifier") \ 672 \ 673 notproduct(bool, VerifyLastFrame, false, \ 674 "Verify oops on last frame on entry to VM") \ 675 \ 676 develop(bool, TraceHandleAllocation, false, \ 677 "Prints out warnings when suspicious many handles are allocated") \ 678 \ 679 product(bool, UseCompilerSafepoints, true, \ 680 "Stop at safepoints in compiled code") \ 681 \ 682 product(bool, UseSplitVerifier, true, \ 683 "use split verifier with StackMapTable attributes") \ 684 \ 685 product(bool, FailOverToOldVerifier, true, \ 686 "fail over to old verifier when split verifier fails") \ 687 \ 688 develop(bool, ShowSafepointMsgs, false, \ 689 "Show msg. about safepoint synch.") \ 690 \ 691 product(bool, SafepointTimeout, false, \ 692 "Time out and warn or fail after SafepointTimeoutDelay " \ 693 "milliseconds if failed to reach safepoint") \ 694 \ 695 develop(bool, DieOnSafepointTimeout, false, \ 696 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 697 \ 698 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 699 /* typically, at most a few retries are needed */ \ 700 product(intx, SuspendRetryCount, 50, \ 701 "Maximum retry count for an external suspend request") \ 702 \ 703 product(intx, SuspendRetryDelay, 5, \ 704 "Milliseconds to delay per retry (* current_retry_count)") \ 705 \ 706 product(bool, AssertOnSuspendWaitFailure, false, \ 707 "Assert/Guarantee on external suspend wait failure") \ 708 \ 709 product(bool, TraceSuspendWaitFailures, false, \ 710 "Trace external suspend wait failures") \ 711 \ 712 product(bool, MaxFDLimit, true, \ 713 "Bump the number of file descriptors to max in solaris.") \ 714 \ 715 diagnostic(bool, LogEvents, true, \ 716 "Enable the various ring buffer event logs") \ 717 \ 718 diagnostic(intx, LogEventsBufferEntries, 10, \ 719 "Enable the various ring buffer event logs") \ 720 \ 721 product(bool, BytecodeVerificationRemote, true, \ 722 "Enables the Java bytecode verifier for remote classes") \ 723 \ 724 product(bool, BytecodeVerificationLocal, false, \ 725 "Enables the Java bytecode verifier for local classes") \ 726 \ 727 develop(bool, ForceFloatExceptions, trueInDebug, \ 728 "Force exceptions on FP stack under/overflow") \ 729 \ 730 develop(bool, VerifyStackAtCalls, false, \ 731 "Verify that the stack pointer is unchanged after calls") \ 732 \ 733 develop(bool, TraceJavaAssertions, false, \ 734 "Trace java language assertions") \ 735 \ 736 notproduct(bool, CheckAssertionStatusDirectives, false, \ 737 "temporary - see javaClasses.cpp") \ 738 \ 739 notproduct(bool, PrintMallocFree, false, \ 740 "Trace calls to C heap malloc/free allocation") \ 741 \ 742 product(bool, PrintOopAddress, false, \ 743 "Always print the location of the oop") \ 744 \ 745 notproduct(bool, VerifyCodeCacheOften, false, \ 746 "Verify compiled-code cache often") \ 747 \ 748 develop(bool, ZapDeadCompiledLocals, false, \ 749 "Zap dead locals in compiler frames") \ 750 \ 751 notproduct(bool, ZapDeadLocalsOld, false, \ 752 "Zap dead locals (old version, zaps all frames when " \ 753 "entering the VM") \ 754 \ 755 notproduct(bool, CheckOopishValues, false, \ 756 "Warn if value contains oop ( requires ZapDeadLocals)") \ 757 \ 758 develop(bool, UseMallocOnly, false, \ 759 "use only malloc/free for allocation (no resource area/arena)") \ 760 \ 761 develop(bool, PrintMalloc, false, \ 762 "print all malloc/free calls") \ 763 \ 764 develop(bool, PrintMallocStatistics, false, \ 765 "print malloc/free statistics") \ 766 \ 767 develop(bool, ZapResourceArea, trueInDebug, \ 768 "Zap freed resource/arena space with 0xABABABAB") \ 769 \ 770 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 771 "Zap freed VM handle space with 0xBCBCBCBC") \ 772 \ 773 develop(bool, ZapJNIHandleArea, trueInDebug, \ 774 "Zap freed JNI handle space with 0xFEFEFEFE") \ 775 \ 776 notproduct(bool, ZapStackSegments, trueInDebug, \ 777 "Zap allocated/freed Stack segments with 0xFADFADED") \ 778 \ 779 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 780 "Zap unused heap space with 0xBAADBABE") \ 781 \ 782 develop(bool, TraceZapUnusedHeapArea, false, \ 783 "Trace zapping of unused heap space") \ 784 \ 785 develop(bool, CheckZapUnusedHeapArea, false, \ 786 "Check zapping of unused heap space") \ 787 \ 788 develop(bool, ZapFillerObjects, trueInDebug, \ 789 "Zap filler objects with 0xDEAFBABE") \ 790 \ 791 develop(bool, PrintVMMessages, true, \ 792 "Print vm messages on console") \ 793 \ 794 product(bool, PrintGCApplicationConcurrentTime, false, \ 795 "Print the time the application has been running") \ 796 \ 797 product(bool, PrintGCApplicationStoppedTime, false, \ 798 "Print the time the application has been stopped") \ 799 \ 800 diagnostic(bool, VerboseVerification, false, \ 801 "Display detailed verification details") \ 802 \ 803 notproduct(uintx, ErrorHandlerTest, 0, \ 804 "If > 0, provokes an error after VM initialization; the value" \ 805 "determines which error to provoke. See test_error_handler()" \ 806 "in debug.cpp.") \ 807 \ 808 develop(bool, Verbose, false, \ 809 "Prints additional debugging information from other modes") \ 810 \ 811 develop(bool, PrintMiscellaneous, false, \ 812 "Prints uncategorized debugging information (requires +Verbose)") \ 813 \ 814 develop(bool, WizardMode, false, \ 815 "Prints much more debugging information") \ 816 \ 817 product(bool, ShowMessageBoxOnError, false, \ 818 "Keep process alive on VM fatal error") \ 819 \ 820 product(bool, CreateMinidumpOnCrash, false, \ 821 "Create minidump on VM fatal error") \ 822 \ 823 product_pd(bool, UseOSErrorReporting, \ 824 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 825 \ 826 product(bool, SuppressFatalErrorMessage, false, \ 827 "Do NO Fatal Error report [Avoid deadlock]") \ 828 \ 829 product(ccstrlist, OnError, "", \ 830 "Run user-defined commands on fatal error; see VMError.cpp " \ 831 "for examples") \ 832 \ 833 product(ccstrlist, OnOutOfMemoryError, "", \ 834 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 835 \ 836 manageable(bool, HeapDumpBeforeFullGC, false, \ 837 "Dump heap to file before any major stop-world GC") \ 838 \ 839 manageable(bool, HeapDumpAfterFullGC, false, \ 840 "Dump heap to file after any major stop-world GC") \ 841 \ 842 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 843 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 844 \ 845 manageable(ccstr, HeapDumpPath, NULL, \ 846 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 847 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 848 "in the working directory)") \ 849 \ 850 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 851 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 852 "when the heap usage is larger than this") \ 853 \ 854 develop(uintx, HeapDumpSegmentSize, 1*G, \ 855 "Approximate segment size when generating a segmented heap dump") \ 856 \ 857 develop(bool, BreakAtWarning, false, \ 858 "Execute breakpoint upon encountering VM warning") \ 859 \ 860 develop(bool, TraceVMOperation, false, \ 861 "Trace vm operations") \ 862 \ 863 develop(bool, UseFakeTimers, false, \ 864 "Tells whether the VM should use system time or a fake timer") \ 865 \ 866 product(ccstr, NativeMemoryTracking, "off", \ 867 "Native memory tracking options") \ 868 \ 869 diagnostic(bool, PrintNMTStatistics, false, \ 870 "Print native memory tracking summary data if it is on") \ 871 \ 872 diagnostic(bool, LogCompilation, false, \ 873 "Log compilation activity in detail to hotspot.log or LogFile") \ 874 \ 875 product(bool, PrintCompilation, false, \ 876 "Print compilations") \ 877 \ 878 diagnostic(bool, TraceNMethodInstalls, false, \ 879 "Trace nmethod intallation") \ 880 \ 881 diagnostic(intx, ScavengeRootsInCode, 2, \ 882 "0: do not allow scavengable oops in the code cache; " \ 883 "1: allow scavenging from the code cache; " \ 884 "2: emit as many constants as the compiler can see") \ 885 \ 886 product(bool, AlwaysRestoreFPU, false, \ 887 "Restore the FPU control word after every JNI call (expensive)") \ 888 \ 889 diagnostic(bool, PrintCompilation2, false, \ 890 "Print additional statistics per compilation") \ 891 \ 892 diagnostic(bool, PrintAdapterHandlers, false, \ 893 "Print code generated for i2c/c2i adapters") \ 894 \ 895 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 896 "Verify that i2c/c2i adapters are called properly") \ 897 \ 898 develop(bool, VerifyAdapterSharing, false, \ 899 "Verify that the code for shared adapters is the equivalent") \ 900 \ 901 diagnostic(bool, PrintAssembly, false, \ 902 "Print assembly code (using external disassembler.so)") \ 903 \ 904 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 905 "Options string passed to disassembler.so") \ 906 \ 907 diagnostic(bool, PrintNMethods, false, \ 908 "Print assembly code for nmethods when generated") \ 909 \ 910 diagnostic(bool, PrintNativeNMethods, false, \ 911 "Print assembly code for native nmethods when generated") \ 912 \ 913 develop(bool, PrintDebugInfo, false, \ 914 "Print debug information for all nmethods when generated") \ 915 \ 916 develop(bool, PrintRelocations, false, \ 917 "Print relocation information for all nmethods when generated") \ 918 \ 919 develop(bool, PrintDependencies, false, \ 920 "Print dependency information for all nmethods when generated") \ 921 \ 922 develop(bool, PrintExceptionHandlers, false, \ 923 "Print exception handler tables for all nmethods when generated") \ 924 \ 925 develop(bool, StressCompiledExceptionHandlers, false, \ 926 "Exercise compiled exception handlers") \ 927 \ 928 develop(bool, InterceptOSException, false, \ 929 "Starts debugger when an implicit OS (e.g., NULL) " \ 930 "exception happens") \ 931 \ 932 product(bool, PrintCodeCache, false, \ 933 "Print the code cache memory usage when exiting") \ 934 \ 935 develop(bool, PrintCodeCache2, false, \ 936 "Print detailed usage info on the code cache when exiting") \ 937 \ 938 product(bool, PrintCodeCacheOnCompilation, false, \ 939 "Print the code cache memory usage each time a method is compiled") \ 940 \ 941 diagnostic(bool, PrintStubCode, false, \ 942 "Print generated stub code") \ 943 \ 944 product(bool, StackTraceInThrowable, true, \ 945 "Collect backtrace in throwable when exception happens") \ 946 \ 947 product(bool, OmitStackTraceInFastThrow, true, \ 948 "Omit backtraces for some 'hot' exceptions in optimized code") \ 949 \ 950 product(bool, ProfilerPrintByteCodeStatistics, false, \ 951 "Prints byte code statictics when dumping profiler output") \ 952 \ 953 product(bool, ProfilerRecordPC, false, \ 954 "Collects tick for each 16 byte interval of compiled code") \ 955 \ 956 product(bool, ProfileVM, false, \ 957 "Profiles ticks that fall within VM (either in the VM Thread " \ 958 "or VM code called through stubs)") \ 959 \ 960 product(bool, ProfileIntervals, false, \ 961 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 962 \ 963 notproduct(bool, ProfilerCheckIntervals, false, \ 964 "Collect and print info on spacing of profiler ticks") \ 965 \ 966 develop(bool, PrintJVMWarnings, false, \ 967 "Prints warnings for unimplemented JVM functions") \ 968 \ 969 product(bool, PrintWarnings, true, \ 970 "Prints JVM warnings to output stream") \ 971 \ 972 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 973 "Prints warnings for stalled SpinLocks") \ 974 \ 975 product(bool, RegisterFinalizersAtInit, true, \ 976 "Register finalizable objects at end of Object.<init> or " \ 977 "after allocation") \ 978 \ 979 develop(bool, RegisterReferences, true, \ 980 "Tells whether the VM should register soft/weak/final/phantom " \ 981 "references") \ 982 \ 983 develop(bool, IgnoreRewrites, false, \ 984 "Supress rewrites of bytecodes in the oopmap generator. " \ 985 "This is unsafe!") \ 986 \ 987 develop(bool, PrintCodeCacheExtension, false, \ 988 "Print extension of code cache") \ 989 \ 990 develop(bool, UsePrivilegedStack, true, \ 991 "Enable the security JVM functions") \ 992 \ 993 develop(bool, ProtectionDomainVerification, true, \ 994 "Verifies protection domain before resolution in system " \ 995 "dictionary") \ 996 \ 997 product(bool, ClassUnloading, true, \ 998 "Do unloading of classes") \ 999 \ 1000 develop(bool, DisableStartThread, false, \ 1001 "Disable starting of additional Java threads " \ 1002 "(for debugging only)") \ 1003 \ 1004 develop(bool, MemProfiling, false, \ 1005 "Write memory usage profiling to log file") \ 1006 \ 1007 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1008 "Prints the system dictionary at exit") \ 1009 \ 1010 experimental(intx, PredictedLoadedClassCount, 0, \ 1011 "Experimental: Tune loaded class cache starting size.") \ 1012 \ 1013 diagnostic(bool, UnsyncloadClass, false, \ 1014 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1015 "class loader must call VM synchronized for findClass " \ 1016 "and defineClass.") \ 1017 \ 1018 product(bool, AlwaysLockClassLoader, false, \ 1019 "Require the VM to acquire the class loader lock before calling " \ 1020 "loadClass() even for class loaders registering " \ 1021 "as parallel capable") \ 1022 \ 1023 product(bool, AllowParallelDefineClass, false, \ 1024 "Allow parallel defineClass requests for class loaders " \ 1025 "registering as parallel capable") \ 1026 \ 1027 product(bool, MustCallLoadClassInternal, false, \ 1028 "Call loadClassInternal() rather than loadClass()") \ 1029 \ 1030 product_pd(bool, DontYieldALot, \ 1031 "Throw away obvious excess yield calls (for SOLARIS only)") \ 1032 \ 1033 product_pd(bool, ConvertSleepToYield, \ 1034 "Converts sleep(0) to thread yield " \ 1035 "(may be off for SOLARIS to improve GUI)") \ 1036 \ 1037 product(bool, ConvertYieldToSleep, false, \ 1038 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 1039 "behavior (SOLARIS only)") \ 1040 \ 1041 product(bool, UseBoundThreads, true, \ 1042 "Bind user level threads to kernel threads (for SOLARIS only)") \ 1043 \ 1044 develop(bool, UseDetachedThreads, true, \ 1045 "Use detached threads that are recycled upon termination " \ 1046 "(for SOLARIS only)") \ 1047 \ 1048 product(bool, UseLWPSynchronization, true, \ 1049 "Use LWP-based instead of libthread-based synchronization " \ 1050 "(SPARC only)") \ 1051 \ 1052 product(ccstr, SyncKnobs, NULL, \ 1053 "(Unstable) Various monitor synchronization tunables") \ 1054 \ 1055 product(intx, EmitSync, 0, \ 1056 "(Unsafe,Unstable) " \ 1057 " Controls emission of inline sync fast-path code") \ 1058 \ 1059 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1060 \ 1061 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1062 \ 1063 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 1064 \ 1065 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 1066 \ 1067 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 1068 \ 1069 product(intx, hashCode, 5, \ 1070 "(Unstable) select hashCode generation algorithm" ) \ 1071 \ 1072 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1073 "(Unstable, Linux-specific)" \ 1074 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 1075 \ 1076 product(bool, FilterSpuriousWakeups, true, \ 1077 "Prevent spurious or premature wakeups from object.wait " \ 1078 "(Solaris only)") \ 1079 \ 1080 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1081 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1082 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1083 \ 1084 develop(bool, UsePthreads, false, \ 1085 "Use pthread-based instead of libthread-based synchronization " \ 1086 "(SPARC only)") \ 1087 \ 1088 product(bool, AdjustConcurrency, false, \ 1089 "call thr_setconcurrency at thread create time to avoid " \ 1090 "LWP starvation on MP systems (For Solaris Only)") \ 1091 \ 1092 product(bool, ReduceSignalUsage, false, \ 1093 "Reduce the use of OS signals in Java and/or the VM") \ 1094 \ 1095 develop_pd(bool, ShareVtableStubs, \ 1096 "Share vtable stubs (smaller code but worse branch prediction") \ 1097 \ 1098 develop(bool, LoadLineNumberTables, true, \ 1099 "Tells whether the class file parser loads line number tables") \ 1100 \ 1101 develop(bool, LoadLocalVariableTables, true, \ 1102 "Tells whether the class file parser loads local variable tables")\ 1103 \ 1104 develop(bool, LoadLocalVariableTypeTables, true, \ 1105 "Tells whether the class file parser loads local variable type tables")\ 1106 \ 1107 product(bool, AllowUserSignalHandlers, false, \ 1108 "Do not complain if the application installs signal handlers " \ 1109 "(Solaris & Linux only)") \ 1110 \ 1111 product(bool, UseSignalChaining, true, \ 1112 "Use signal-chaining to invoke signal handlers installed " \ 1113 "by the application (Solaris & Linux only)") \ 1114 \ 1115 product(bool, UseAltSigs, false, \ 1116 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1117 "internal signals (Solaris only)") \ 1118 \ 1119 product(bool, AllowJNIEnvProxy, false, \ 1120 "Allow JNIEnv proxies for jdbx") \ 1121 \ 1122 product(bool, JNIDetachReleasesMonitors, true, \ 1123 "JNI DetachCurrentThread releases monitors owned by thread") \ 1124 \ 1125 product(bool, RestoreMXCSROnJNICalls, false, \ 1126 "Restore MXCSR when returning from JNI calls") \ 1127 \ 1128 product(bool, CheckJNICalls, false, \ 1129 "Verify all arguments to JNI calls") \ 1130 \ 1131 product(bool, UseFastJNIAccessors, true, \ 1132 "Use optimized versions of Get<Primitive>Field") \ 1133 \ 1134 product(bool, EagerXrunInit, false, \ 1135 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1136 " but not all -Xrun libraries may support the state of the VM at this time") \ 1137 \ 1138 product(bool, PreserveAllAnnotations, false, \ 1139 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1140 \ 1141 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1142 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1143 \ 1144 product(bool, LazyBootClassLoader, true, \ 1145 "Enable/disable lazy opening of boot class path entries") \ 1146 \ 1147 product(bool, UseXMMForArrayCopy, false, \ 1148 "Use SSE2 MOVQ instruction for Arraycopy") \ 1149 \ 1150 product(intx, FieldsAllocationStyle, 1, \ 1151 "0 - type based with oops first, 1 - with oops last, " \ 1152 "2 - oops in super and sub classes are together") \ 1153 \ 1154 product(bool, CompactFields, true, \ 1155 "Allocate nonstatic fields in gaps between previous fields") \ 1156 \ 1157 notproduct(bool, PrintCompactFieldsSavings, false, \ 1158 "Print how many words were saved with CompactFields") \ 1159 \ 1160 notproduct(bool, PrintFieldLayout, false, \ 1161 "Print field layout for each class") \ 1162 \ 1163 product(intx, ContendedPaddingWidth, 128, \ 1164 "How many bytes to pad the fields/classes marked @Contended with")\ 1165 \ 1166 product(bool, EnableContended, true, \ 1167 "Enable @Contended annotation support") \ 1168 \ 1169 product(bool, RestrictContended, true, \ 1170 "Restrict @Contended to trusted classes") \ 1171 \ 1172 product(bool, UseBiasedLocking, true, \ 1173 "Enable biased locking in JVM") \ 1174 \ 1175 product(intx, BiasedLockingStartupDelay, 4000, \ 1176 "Number of milliseconds to wait before enabling biased locking") \ 1177 \ 1178 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1179 "Print statistics of biased locking in JVM") \ 1180 \ 1181 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1182 "Threshold of number of revocations per type to try to " \ 1183 "rebias all objects in the heap of that type") \ 1184 \ 1185 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1186 "Threshold of number of revocations per type to permanently " \ 1187 "revoke biases of all objects in the heap of that type") \ 1188 \ 1189 product(intx, BiasedLockingDecayTime, 25000, \ 1190 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1191 "type after previous bulk rebias") \ 1192 \ 1193 /* tracing */ \ 1194 \ 1195 notproduct(bool, TraceRuntimeCalls, false, \ 1196 "Trace run-time calls") \ 1197 \ 1198 develop(bool, TraceJNICalls, false, \ 1199 "Trace JNI calls") \ 1200 \ 1201 notproduct(bool, TraceJVMCalls, false, \ 1202 "Trace JVM calls") \ 1203 \ 1204 product(ccstr, TraceJVMTI, NULL, \ 1205 "Trace flags for JVMTI functions and events") \ 1206 \ 1207 /* This option can change an EMCP method into an obsolete method. */ \ 1208 /* This can affect tests that except specific methods to be EMCP. */ \ 1209 /* This option should be used with caution. */ \ 1210 product(bool, StressLdcRewrite, false, \ 1211 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1212 \ 1213 product(intx, TraceRedefineClasses, 0, \ 1214 "Trace level for JVMTI RedefineClasses") \ 1215 \ 1216 develop(bool, StressMethodComparator, false, \ 1217 "run the MethodComparator on all loaded methods") \ 1218 \ 1219 /* change to false by default sometime after Mustang */ \ 1220 product(bool, VerifyMergedCPBytecodes, true, \ 1221 "Verify bytecodes after RedefineClasses constant pool merging") \ 1222 \ 1223 develop(bool, TraceJNIHandleAllocation, false, \ 1224 "Trace allocation/deallocation of JNI handle blocks") \ 1225 \ 1226 develop(bool, TraceThreadEvents, false, \ 1227 "Trace all thread events") \ 1228 \ 1229 develop(bool, TraceBytecodes, false, \ 1230 "Trace bytecode execution") \ 1231 \ 1232 develop(bool, TraceClassInitialization, false, \ 1233 "Trace class initialization") \ 1234 \ 1235 develop(bool, TraceExceptions, false, \ 1236 "Trace exceptions") \ 1237 \ 1238 develop(bool, TraceICs, false, \ 1239 "Trace inline cache changes") \ 1240 \ 1241 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1242 "Trace method invocation counter overflow") \ 1243 \ 1244 develop(bool, TraceInlineCacheClearing, false, \ 1245 "Trace clearing of inline caches in nmethods") \ 1246 \ 1247 develop(bool, TraceDependencies, false, \ 1248 "Trace dependencies") \ 1249 \ 1250 develop(bool, VerifyDependencies, trueInDebug, \ 1251 "Exercise and verify the compilation dependency mechanism") \ 1252 \ 1253 develop(bool, TraceNewOopMapGeneration, false, \ 1254 "Trace OopMapGeneration") \ 1255 \ 1256 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1257 "Trace OopMapGeneration: print detailed cell states") \ 1258 \ 1259 develop(bool, TimeOopMap, false, \ 1260 "Time calls to GenerateOopMap::compute_map() in sum") \ 1261 \ 1262 develop(bool, TimeOopMap2, false, \ 1263 "Time calls to GenerateOopMap::compute_map() individually") \ 1264 \ 1265 develop(bool, TraceMonitorMismatch, false, \ 1266 "Trace monitor matching failures during OopMapGeneration") \ 1267 \ 1268 develop(bool, TraceOopMapRewrites, false, \ 1269 "Trace rewritting of method oops during oop map generation") \ 1270 \ 1271 develop(bool, TraceSafepoint, false, \ 1272 "Trace safepoint operations") \ 1273 \ 1274 develop(bool, TraceICBuffer, false, \ 1275 "Trace usage of IC buffer") \ 1276 \ 1277 develop(bool, TraceCompiledIC, false, \ 1278 "Trace changes of compiled IC") \ 1279 \ 1280 notproduct(bool, TraceZapDeadLocals, false, \ 1281 "Trace zapping dead locals") \ 1282 \ 1283 develop(bool, TraceStartupTime, false, \ 1284 "Trace setup time") \ 1285 \ 1286 develop(bool, TraceProtectionDomainVerification, false, \ 1287 "Trace protection domain verifcation") \ 1288 \ 1289 develop(bool, TraceClearedExceptions, false, \ 1290 "Prints when an exception is forcibly cleared") \ 1291 \ 1292 product(bool, TraceClassResolution, false, \ 1293 "Trace all constant pool resolutions (for debugging)") \ 1294 \ 1295 product(bool, TraceBiasedLocking, false, \ 1296 "Trace biased locking in JVM") \ 1297 \ 1298 product(bool, TraceMonitorInflation, false, \ 1299 "Trace monitor inflation in JVM") \ 1300 \ 1301 /* gc */ \ 1302 \ 1303 product(bool, UseSerialGC, false, \ 1304 "Use the serial garbage collector") \ 1305 \ 1306 product(bool, UseG1GC, false, \ 1307 "Use the Garbage-First garbage collector") \ 1308 \ 1309 product(bool, UseParallelGC, false, \ 1310 "Use the Parallel Scavenge garbage collector") \ 1311 \ 1312 product(bool, UseParallelOldGC, false, \ 1313 "Use the Parallel Old garbage collector") \ 1314 \ 1315 product(uintx, HeapMaximumCompactionInterval, 20, \ 1316 "How often should we maximally compact the heap (not allowing " \ 1317 "any dead space)") \ 1318 \ 1319 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1320 "The collection count for the first maximum compaction") \ 1321 \ 1322 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1323 "In the Parallel Old garbage collector maximum compaction for " \ 1324 "a system GC") \ 1325 \ 1326 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1327 "The mean used by the par compact dead wood" \ 1328 "limiter (a number between 0-100).") \ 1329 \ 1330 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1331 "The standard deviation used by the par compact dead wood" \ 1332 "limiter (a number between 0-100).") \ 1333 \ 1334 product(uintx, ParallelGCThreads, 0, \ 1335 "Number of parallel threads parallel gc will use") \ 1336 \ 1337 product(bool, UseDynamicNumberOfGCThreads, false, \ 1338 "Dynamically choose the number of parallel threads " \ 1339 "parallel gc will use") \ 1340 \ 1341 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1342 "Force dynamic selection of the number of" \ 1343 "parallel threads parallel gc will use to aid debugging") \ 1344 \ 1345 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1346 "Size of heap (bytes) per GC thread used in calculating the " \ 1347 "number of GC threads") \ 1348 \ 1349 product(bool, TraceDynamicGCThreads, false, \ 1350 "Trace the dynamic GC thread usage") \ 1351 \ 1352 develop(bool, ParallelOldGCSplitALot, false, \ 1353 "Provoke splitting (copying data from a young gen space to" \ 1354 "multiple destination spaces)") \ 1355 \ 1356 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1357 "How often to provoke splitting a young gen space") \ 1358 \ 1359 product(uintx, ConcGCThreads, 0, \ 1360 "Number of threads concurrent gc will use") \ 1361 \ 1362 product(uintx, YoungPLABSize, 4096, \ 1363 "Size of young gen promotion labs (in HeapWords)") \ 1364 \ 1365 product(uintx, OldPLABSize, 1024, \ 1366 "Size of old gen promotion labs (in HeapWords)") \ 1367 \ 1368 product(uintx, GCTaskTimeStampEntries, 200, \ 1369 "Number of time stamp entries per gc worker thread") \ 1370 \ 1371 product(bool, AlwaysTenure, false, \ 1372 "Always tenure objects in eden. (ParallelGC only)") \ 1373 \ 1374 product(bool, NeverTenure, false, \ 1375 "Never tenure objects in eden, May tenure on overflow " \ 1376 "(ParallelGC only)") \ 1377 \ 1378 product(bool, ScavengeBeforeFullGC, true, \ 1379 "Scavenge youngest generation before each full GC, " \ 1380 "used with UseParallelGC") \ 1381 \ 1382 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1383 "Allow scavenges to occur when to_space contains objects.") \ 1384 \ 1385 product(bool, UseConcMarkSweepGC, false, \ 1386 "Use Concurrent Mark-Sweep GC in the old generation") \ 1387 \ 1388 product(bool, ExplicitGCInvokesConcurrent, false, \ 1389 "A System.gc() request invokes a concurrent collection;" \ 1390 " (effective only when UseConcMarkSweepGC)") \ 1391 \ 1392 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1393 "A System.gc() request invokes a concurrent collection and " \ 1394 "also unloads classes during such a concurrent gc cycle " \ 1395 "(effective only when UseConcMarkSweepGC)") \ 1396 \ 1397 product(bool, GCLockerInvokesConcurrent, false, \ 1398 "The exit of a JNI CS necessitating a scavenge also" \ 1399 " kicks off a bkgrd concurrent collection") \ 1400 \ 1401 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1402 "How much the GC can expand the eden by while the GC locker " \ 1403 "is active (as a percentage)") \ 1404 \ 1405 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1406 "Use Adaptive Free Lists in the CMS generation") \ 1407 \ 1408 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1409 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1410 \ 1411 develop(bool, RotateCMSCollectionTypes, false, \ 1412 "Rotate the CMS collections among concurrent and STW") \ 1413 \ 1414 product(bool, UseCMSBestFit, true, \ 1415 "Use CMS best fit allocation strategy") \ 1416 \ 1417 product(bool, UseCMSCollectionPassing, true, \ 1418 "Use passing of collection from background to foreground") \ 1419 \ 1420 product(bool, UseParNewGC, false, \ 1421 "Use parallel threads in the new generation.") \ 1422 \ 1423 product(bool, ParallelGCVerbose, false, \ 1424 "Verbose output for parallel GC.") \ 1425 \ 1426 product(intx, ParallelGCBufferWastePct, 10, \ 1427 "wasted fraction of parallel allocation buffer.") \ 1428 \ 1429 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1430 "Retain parallel allocation buffers across scavenges; " \ 1431 " -- disabled because this currently conflicts with " \ 1432 " parallel card scanning under certain conditions ") \ 1433 \ 1434 product(intx, TargetPLABWastePct, 10, \ 1435 "target wasted space in last buffer as pct of overall allocation")\ 1436 \ 1437 product(uintx, PLABWeight, 75, \ 1438 "Percentage (0-100) used to weight the current sample when" \ 1439 "computing exponentially decaying average for ResizePLAB.") \ 1440 \ 1441 product(bool, ResizePLAB, true, \ 1442 "Dynamically resize (survivor space) promotion labs") \ 1443 \ 1444 product(bool, PrintPLAB, false, \ 1445 "Print (survivor space) promotion labs sizing decisions") \ 1446 \ 1447 product(intx, ParGCArrayScanChunk, 50, \ 1448 "Scan a subset and push remainder, if array is bigger than this") \ 1449 \ 1450 product(bool, ParGCUseLocalOverflow, false, \ 1451 "Instead of a global overflow list, use local overflow stacks") \ 1452 \ 1453 product(bool, ParGCTrimOverflow, true, \ 1454 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1455 \ 1456 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1457 "Whether we should simulate work queue overflow in ParNew") \ 1458 \ 1459 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1460 "An `interval' counter that determines how frequently " \ 1461 "we simulate overflow; a smaller number increases frequency") \ 1462 \ 1463 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1464 "The desired number of objects to claim from the overflow list") \ 1465 \ 1466 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1467 "The number of strides per worker thread that we divide up the " \ 1468 "card table scanning work into") \ 1469 \ 1470 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1471 "The number of cards in each chunk of the parallel chunks used " \ 1472 "during card table scanning") \ 1473 \ 1474 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1475 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1476 "parallel GC.") \ 1477 \ 1478 product(uintx, OldPLABWeight, 50, \ 1479 "Percentage (0-100) used to weight the current sample when" \ 1480 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 1481 \ 1482 product(bool, ResizeOldPLAB, true, \ 1483 "Dynamically resize (old gen) promotion labs") \ 1484 \ 1485 product(bool, PrintOldPLAB, false, \ 1486 "Print (old gen) promotion labs sizing decisions") \ 1487 \ 1488 product(uintx, CMSOldPLABMin, 16, \ 1489 "Min size of CMS gen promotion lab caches per worker per blksize")\ 1490 \ 1491 product(uintx, CMSOldPLABMax, 1024, \ 1492 "Max size of CMS gen promotion lab caches per worker per blksize")\ 1493 \ 1494 product(uintx, CMSOldPLABNumRefills, 4, \ 1495 "Nominal number of refills of CMS gen promotion lab cache" \ 1496 " per worker per block size") \ 1497 \ 1498 product(bool, CMSOldPLABResizeQuicker, false, \ 1499 "Whether to react on-the-fly during a scavenge to a sudden" \ 1500 " change in block demand rate") \ 1501 \ 1502 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1503 "The tolerance of the phase-change detector for on-the-fly" \ 1504 " PLAB resizing during a scavenge") \ 1505 \ 1506 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1507 "The gain in the feedback loop for on-the-fly PLAB resizing" \ 1508 " during a scavenge") \ 1509 \ 1510 product(bool, AlwaysPreTouch, false, \ 1511 "It forces all freshly committed pages to be pre-touched.") \ 1512 \ 1513 product_pd(intx, CMSYoungGenPerWorker, \ 1514 "The maximum size of young gen chosen by default per GC worker " \ 1515 "thread available") \ 1516 \ 1517 product(bool, CMSIncrementalMode, false, \ 1518 "Whether CMS GC should operate in \"incremental\" mode") \ 1519 \ 1520 product(uintx, CMSIncrementalDutyCycle, 10, \ 1521 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1522 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1523 "value") \ 1524 \ 1525 product(bool, CMSIncrementalPacing, true, \ 1526 "Whether the CMS incremental mode duty cycle should be " \ 1527 "automatically adjusted") \ 1528 \ 1529 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1530 "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1531 "enabled (a percentage, 0-100)") \ 1532 \ 1533 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1534 "Percentage (0-100) used to add conservatism when computing the " \ 1535 "duty cycle") \ 1536 \ 1537 product(uintx, CMSIncrementalOffset, 0, \ 1538 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1539 " is shifted to the right within the period between young GCs") \ 1540 \ 1541 product(uintx, CMSExpAvgFactor, 50, \ 1542 "Percentage (0-100) used to weight the current sample when" \ 1543 "computing exponential averages for CMS statistics.") \ 1544 \ 1545 product(uintx, CMS_FLSWeight, 75, \ 1546 "Percentage (0-100) used to weight the current sample when" \ 1547 "computing exponentially decating averages for CMS FLS statistics.") \ 1548 \ 1549 product(uintx, CMS_FLSPadding, 1, \ 1550 "The multiple of deviation from mean to use for buffering" \ 1551 "against volatility in free list demand.") \ 1552 \ 1553 product(uintx, FLSCoalescePolicy, 2, \ 1554 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1555 \ 1556 product(bool, FLSAlwaysCoalesceLarge, false, \ 1557 "CMS: Larger free blocks are always available for coalescing") \ 1558 \ 1559 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1560 "CMS: the smaller the percentage the greater the coalition force")\ 1561 \ 1562 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1563 "CMS: the factor by which to inflate estimated demand of small" \ 1564 " block sizes to prevent coalescing with an adjoining block") \ 1565 \ 1566 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1567 "CMS: the factor by which to inflate estimated demand of large" \ 1568 " block sizes to prevent coalescing with an adjoining block") \ 1569 \ 1570 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1571 "CMS: the factor by which to inflate estimated demand of small" \ 1572 " block sizes to prevent splitting to supply demand for smaller" \ 1573 " blocks") \ 1574 \ 1575 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1576 "CMS: the factor by which to inflate estimated demand of large" \ 1577 " block sizes to prevent splitting to supply demand for smaller" \ 1578 " blocks") \ 1579 \ 1580 product(bool, CMSExtrapolateSweep, false, \ 1581 "CMS: cushion for block demand during sweep") \ 1582 \ 1583 product(uintx, CMS_SweepWeight, 75, \ 1584 "Percentage (0-100) used to weight the current sample when " \ 1585 "computing exponentially decaying average for inter-sweep " \ 1586 "duration") \ 1587 \ 1588 product(uintx, CMS_SweepPadding, 1, \ 1589 "The multiple of deviation from mean to use for buffering " \ 1590 "against volatility in inter-sweep duration.") \ 1591 \ 1592 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1593 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1594 "duration exceeds this threhold in milliseconds") \ 1595 \ 1596 develop(bool, CMSTraceIncrementalMode, false, \ 1597 "Trace CMS incremental mode") \ 1598 \ 1599 develop(bool, CMSTraceIncrementalPacing, false, \ 1600 "Trace CMS incremental mode pacing computation") \ 1601 \ 1602 develop(bool, CMSTraceThreadState, false, \ 1603 "Trace the CMS thread state (enable the trace_state() method)") \ 1604 \ 1605 product(bool, CMSClassUnloadingEnabled, true, \ 1606 "Whether class unloading enabled when using CMS GC") \ 1607 \ 1608 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1609 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1610 " for which classes may not be unloaded") \ 1611 \ 1612 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1613 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1614 \ 1615 product(bool, UseCMSCompactAtFullCollection, true, \ 1616 "Use mark sweep compact at full collections") \ 1617 \ 1618 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1619 "Number of CMS full collection done before compaction if > 0") \ 1620 \ 1621 develop(intx, CMSDictionaryChoice, 0, \ 1622 "Use BinaryTreeDictionary as default in the CMS generation") \ 1623 \ 1624 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1625 "Replenish an indexed free list with this number of chunks") \ 1626 \ 1627 product(bool, CMSReplenishIntermediate, true, \ 1628 "Replenish all intermediate free-list caches") \ 1629 \ 1630 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1631 "When satisfying batched demand, split blocks from the " \ 1632 "IndexedFreeList whose size is a multiple of requested size") \ 1633 \ 1634 product(bool, CMSLoopWarn, false, \ 1635 "Warn in case of excessive CMS looping") \ 1636 \ 1637 develop(bool, CMSOverflowEarlyRestoration, false, \ 1638 "Whether preserved marks should be restored early") \ 1639 \ 1640 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1641 "Size of marking stack") \ 1642 \ 1643 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1644 "Max size of marking stack") \ 1645 \ 1646 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1647 "Whether we should simulate frequent marking stack / work queue" \ 1648 " overflow") \ 1649 \ 1650 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1651 "An `interval' counter that determines how frequently" \ 1652 " we simulate overflow; a smaller number increases frequency") \ 1653 \ 1654 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1655 "(Temporary, subject to experimentation)" \ 1656 "Maximum number of abortable preclean iterations, if > 0") \ 1657 \ 1658 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1659 "(Temporary, subject to experimentation)" \ 1660 "Maximum time in abortable preclean in ms") \ 1661 \ 1662 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1663 "(Temporary, subject to experimentation)" \ 1664 "Nominal minimum work per abortable preclean iteration") \ 1665 \ 1666 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1667 "(Temporary, subject to experimentation)" \ 1668 " Time that we sleep between iterations when not given" \ 1669 " enough work per iteration") \ 1670 \ 1671 product(uintx, CMSRescanMultiple, 32, \ 1672 "Size (in cards) of CMS parallel rescan task") \ 1673 \ 1674 product(uintx, CMSConcMarkMultiple, 32, \ 1675 "Size (in cards) of CMS concurrent MT marking task") \ 1676 \ 1677 product(bool, CMSAbortSemantics, false, \ 1678 "Whether abort-on-overflow semantics is implemented") \ 1679 \ 1680 product(bool, CMSParallelRemarkEnabled, true, \ 1681 "Whether parallel remark enabled (only if ParNewGC)") \ 1682 \ 1683 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1684 "Whether parallel remark of survivor space" \ 1685 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1686 \ 1687 product(bool, CMSPLABRecordAlways, true, \ 1688 "Whether to always record survivor space PLAB bdries" \ 1689 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1690 \ 1691 product(bool, CMSConcurrentMTEnabled, true, \ 1692 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1693 \ 1694 product(bool, CMSPrecleaningEnabled, true, \ 1695 "Whether concurrent precleaning enabled") \ 1696 \ 1697 product(uintx, CMSPrecleanIter, 3, \ 1698 "Maximum number of precleaning iteration passes") \ 1699 \ 1700 product(uintx, CMSPrecleanNumerator, 2, \ 1701 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1702 " ratio") \ 1703 \ 1704 product(uintx, CMSPrecleanDenominator, 3, \ 1705 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1706 " ratio") \ 1707 \ 1708 product(bool, CMSPrecleanRefLists1, true, \ 1709 "Preclean ref lists during (initial) preclean phase") \ 1710 \ 1711 product(bool, CMSPrecleanRefLists2, false, \ 1712 "Preclean ref lists during abortable preclean phase") \ 1713 \ 1714 product(bool, CMSPrecleanSurvivors1, false, \ 1715 "Preclean survivors during (initial) preclean phase") \ 1716 \ 1717 product(bool, CMSPrecleanSurvivors2, true, \ 1718 "Preclean survivors during abortable preclean phase") \ 1719 \ 1720 product(uintx, CMSPrecleanThreshold, 1000, \ 1721 "Don't re-iterate if #dirty cards less than this") \ 1722 \ 1723 product(bool, CMSCleanOnEnter, true, \ 1724 "Clean-on-enter optimization for reducing number of dirty cards") \ 1725 \ 1726 product(uintx, CMSRemarkVerifyVariant, 1, \ 1727 "Choose variant (1,2) of verification following remark") \ 1728 \ 1729 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1730 "If Eden used is below this value, don't try to schedule remark") \ 1731 \ 1732 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1733 "The Eden occupancy % at which to try and schedule remark pause") \ 1734 \ 1735 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1736 "Start sampling Eden top at least before yg occupancy reaches" \ 1737 " 1/<ratio> of the size at which we plan to schedule remark") \ 1738 \ 1739 product(uintx, CMSSamplingGrain, 16*K, \ 1740 "The minimum distance between eden samples for CMS (see above)") \ 1741 \ 1742 product(bool, CMSScavengeBeforeRemark, false, \ 1743 "Attempt scavenge before the CMS remark step") \ 1744 \ 1745 develop(bool, CMSTraceSweeper, false, \ 1746 "Trace some actions of the CMS sweeper") \ 1747 \ 1748 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1749 "Don't drain below this size per parallel worker/thief") \ 1750 \ 1751 manageable(intx, CMSWaitDuration, 2000, \ 1752 "Time in milliseconds that CMS thread waits for young GC") \ 1753 \ 1754 develop(uintx, CMSCheckInterval, 1000, \ 1755 "Interval in milliseconds that CMS thread checks if it " \ 1756 "should start a collection cycle") \ 1757 \ 1758 product(bool, CMSYield, true, \ 1759 "Yield between steps of concurrent mark & sweep") \ 1760 \ 1761 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1762 "Bitmap operations should process at most this many bits" \ 1763 "between yields") \ 1764 \ 1765 product(bool, CMSDumpAtPromotionFailure, false, \ 1766 "Dump useful information about the state of the CMS old " \ 1767 " generation upon a promotion failure.") \ 1768 \ 1769 product(bool, CMSPrintChunksInDump, false, \ 1770 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1771 " more detailed information about the free chunks.") \ 1772 \ 1773 product(bool, CMSPrintObjectsInDump, false, \ 1774 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1775 " more detailed information about the allocated objects.") \ 1776 \ 1777 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1778 "Verify that all refs across the FLS boundary " \ 1779 " are to valid objects") \ 1780 \ 1781 diagnostic(bool, FLSVerifyLists, false, \ 1782 "Do lots of (expensive) FreeListSpace verification") \ 1783 \ 1784 diagnostic(bool, FLSVerifyIndexTable, false, \ 1785 "Do lots of (expensive) FLS index table verification") \ 1786 \ 1787 develop(bool, FLSVerifyDictionary, false, \ 1788 "Do lots of (expensive) FLS dictionary verification") \ 1789 \ 1790 develop(bool, VerifyBlockOffsetArray, false, \ 1791 "Do (expensive!) block offset array verification") \ 1792 \ 1793 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1794 "Maintain _unallocated_block in BlockOffsetArray" \ 1795 " (currently applicable only to CMS collector)") \ 1796 \ 1797 develop(bool, TraceCMSState, false, \ 1798 "Trace the state of the CMS collection") \ 1799 \ 1800 product(intx, RefDiscoveryPolicy, 0, \ 1801 "Whether reference-based(0) or referent-based(1)") \ 1802 \ 1803 product(bool, ParallelRefProcEnabled, false, \ 1804 "Enable parallel reference processing whenever possible") \ 1805 \ 1806 product(bool, ParallelRefProcBalancingEnabled, true, \ 1807 "Enable balancing of reference processing queues") \ 1808 \ 1809 product(uintx, CMSTriggerRatio, 80, \ 1810 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1811 "allocated before a CMS collection cycle commences") \ 1812 \ 1813 product(uintx, CMSBootstrapOccupancy, 50, \ 1814 "Percentage CMS generation occupancy at which to " \ 1815 "initiate CMS collection for bootstrapping collection stats") \ 1816 \ 1817 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1818 "Percentage CMS generation occupancy to start a CMS collection " \ 1819 "cycle. A negative value means that CMSTriggerRatio is used") \ 1820 \ 1821 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1822 "Percentage of the (entire) heap occupancy to start a " \ 1823 "concurrent GC cycle. It is used by GCs that trigger a " \ 1824 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1825 "not just one of the generations (e.g., G1). A value of 0 " \ 1826 "denotes 'do constant GC cycles'.") \ 1827 \ 1828 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1829 "Only use occupancy as a crierion for starting a CMS collection") \ 1830 \ 1831 product(intx, CMSIsTooFullPercentage, 98, \ 1832 "An absolute ceiling above which CMS will always consider the " \ 1833 "unloading of classes when class unloading is enabled") \ 1834 \ 1835 develop(bool, CMSTestInFreeList, false, \ 1836 "Check if the coalesced range is already in the " \ 1837 "free lists as claimed") \ 1838 \ 1839 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1840 "Check that all the garbage collected was returned to the " \ 1841 "free lists.") \ 1842 \ 1843 notproduct(bool, ScavengeALot, false, \ 1844 "Force scavenge at every Nth exit from the runtime system " \ 1845 "(N=ScavengeALotInterval)") \ 1846 \ 1847 develop(bool, FullGCALot, false, \ 1848 "Force full gc at every Nth exit from the runtime system " \ 1849 "(N=FullGCALotInterval)") \ 1850 \ 1851 notproduct(bool, GCALotAtAllSafepoints, false, \ 1852 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1853 \ 1854 product(bool, PrintPromotionFailure, false, \ 1855 "Print additional diagnostic information following " \ 1856 " promotion failure") \ 1857 \ 1858 notproduct(bool, PromotionFailureALot, false, \ 1859 "Use promotion failure handling on every youngest generation " \ 1860 "collection") \ 1861 \ 1862 develop(uintx, PromotionFailureALotCount, 1000, \ 1863 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1864 "refill attempts (ParNew) or promotion attempts " \ 1865 "(other young collectors) ") \ 1866 \ 1867 develop(uintx, PromotionFailureALotInterval, 5, \ 1868 "Total collections between promotion failures alot") \ 1869 \ 1870 experimental(intx, WorkStealingSleepMillis, 1, \ 1871 "Sleep time when sleep is used for yields") \ 1872 \ 1873 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1874 "Number of yields before a sleep is done during workstealing") \ 1875 \ 1876 experimental(uintx, WorkStealingHardSpins, 4096, \ 1877 "Number of iterations in a spin loop between checks on " \ 1878 "time out of hard spin") \ 1879 \ 1880 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1881 "Ratio of hard spins to calls to yield") \ 1882 \ 1883 develop(uintx, ObjArrayMarkingStride, 512, \ 1884 "Number of ObjArray elements to push onto the marking stack" \ 1885 "before pushing a continuation entry") \ 1886 \ 1887 develop(bool, MetadataAllocationFailALot, false, \ 1888 "Fail metadata allocations at intervals controlled by " \ 1889 "MetadataAllocationFailALotInterval") \ 1890 \ 1891 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1892 "metadata allocation failure alot interval") \ 1893 \ 1894 develop(bool, MetaDataDeallocateALot, false, \ 1895 "Deallocation bunches of metadata at intervals controlled by " \ 1896 "MetaDataAllocateALotInterval") \ 1897 \ 1898 develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1899 "Metadata deallocation alot interval") \ 1900 \ 1901 develop(bool, TraceMetadataChunkAllocation, false, \ 1902 "Trace chunk metadata allocations") \ 1903 \ 1904 product(bool, TraceMetadataHumongousAllocation, false, \ 1905 "Trace humongous metadata allocations") \ 1906 \ 1907 develop(bool, TraceMetavirtualspaceAllocation, false, \ 1908 "Trace virtual space metadata allocations") \ 1909 \ 1910 notproduct(bool, ExecuteInternalVMTests, false, \ 1911 "Enable execution of internal VM tests.") \ 1912 \ 1913 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1914 \ 1915 product_pd(bool, ResizeTLAB, \ 1916 "Dynamically resize tlab size for threads") \ 1917 \ 1918 product(bool, ZeroTLAB, false, \ 1919 "Zero out the newly created TLAB") \ 1920 \ 1921 product(bool, FastTLABRefill, true, \ 1922 "Use fast TLAB refill code") \ 1923 \ 1924 product(bool, PrintTLAB, false, \ 1925 "Print various TLAB related information") \ 1926 \ 1927 product(bool, TLABStats, true, \ 1928 "Print various TLAB related information") \ 1929 \ 1930 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1931 "Enable LowMemoryProtection")) \ 1932 \ 1933 product_pd(bool, NeverActAsServerClassMachine, \ 1934 "Never act like a server-class machine") \ 1935 \ 1936 product(bool, AlwaysActAsServerClassMachine, false, \ 1937 "Always act like a server-class machine") \ 1938 \ 1939 product_pd(uint64_t, MaxRAM, \ 1940 "Real memory size (in bytes) used to set maximum heap size") \ 1941 \ 1942 product(uintx, ErgoHeapSizeLimit, 0, \ 1943 "Maximum ergonomically set heap size (in bytes); zero means use " \ 1944 "MaxRAM / MaxRAMFraction") \ 1945 \ 1946 product(uintx, MaxRAMFraction, 4, \ 1947 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1948 "size") \ 1949 \ 1950 product(uintx, DefaultMaxRAMFraction, 4, \ 1951 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1952 "size; deprecated: to be renamed to MaxRAMFraction") \ 1953 \ 1954 product(uintx, MinRAMFraction, 2, \ 1955 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 1956 "size on systems with small physical memory size") \ 1957 \ 1958 product(uintx, InitialRAMFraction, 64, \ 1959 "Fraction (1/n) of real memory used for initial heap size") \ 1960 \ 1961 product(bool, UseAutoGCSelectPolicy, false, \ 1962 "Use automatic collection selection policy") \ 1963 \ 1964 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1965 "Automatic GC selection pause threshhold in ms") \ 1966 \ 1967 product(bool, UseAdaptiveSizePolicy, true, \ 1968 "Use adaptive generation sizing policies") \ 1969 \ 1970 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1971 "Use adaptive survivor sizing policies") \ 1972 \ 1973 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1974 "Use adaptive young-old sizing policies at minor collections") \ 1975 \ 1976 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1977 "Use adaptive young-old sizing policies at major collections") \ 1978 \ 1979 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1980 "Use statistics from System.GC for adaptive size policy") \ 1981 \ 1982 product(bool, UseAdaptiveGCBoundary, false, \ 1983 "Allow young-old boundary to move") \ 1984 \ 1985 develop(bool, TraceAdaptiveGCBoundary, false, \ 1986 "Trace young-old boundary moves") \ 1987 \ 1988 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1989 "Resize the virtual spaces of the young or old generations") \ 1990 \ 1991 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1992 "Policy for changeing generation size for throughput goals") \ 1993 \ 1994 product(uintx, AdaptiveSizePausePolicy, 0, \ 1995 "Policy for changing generation size for pause goals") \ 1996 \ 1997 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1998 "Adjust tenured generation to achive a minor pause goal") \ 1999 \ 2000 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2001 "Adjust young generation to achive a major pause goal") \ 2002 \ 2003 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2004 "Number of steps where heuristics is used before data is used") \ 2005 \ 2006 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2007 "Number of collections before the adaptive sizing is started") \ 2008 \ 2009 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2010 "Collecton interval for printing information; zero => never") \ 2011 \ 2012 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2013 "Use adaptive minimum footprint as a goal") \ 2014 \ 2015 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2016 "Weight given to exponential resizing, between 0 and 100") \ 2017 \ 2018 product(uintx, AdaptiveTimeWeight, 25, \ 2019 "Weight given to time in adaptive policy, between 0 and 100") \ 2020 \ 2021 product(uintx, PausePadding, 1, \ 2022 "How much buffer to keep for pause time") \ 2023 \ 2024 product(uintx, PromotedPadding, 3, \ 2025 "How much buffer to keep for promotion failure") \ 2026 \ 2027 product(uintx, SurvivorPadding, 3, \ 2028 "How much buffer to keep for survivor overflow") \ 2029 \ 2030 product(uintx, ThresholdTolerance, 10, \ 2031 "Allowed collection cost difference between generations") \ 2032 \ 2033 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2034 "If collection costs are within margin, reduce both by full " \ 2035 "delta") \ 2036 \ 2037 product(uintx, YoungGenerationSizeIncrement, 20, \ 2038 "Adaptive size percentage change in young generation") \ 2039 \ 2040 product(uintx, YoungGenerationSizeSupplement, 80, \ 2041 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2042 \ 2043 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2044 "Decay factor to YoungedGenerationSizeSupplement") \ 2045 \ 2046 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2047 "Adaptive size percentage change in tenured generation") \ 2048 \ 2049 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2050 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2051 \ 2052 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2053 "Decay factor to TenuredGenerationSizeIncrement") \ 2054 \ 2055 product(uintx, MaxGCPauseMillis, max_uintx, \ 2056 "Adaptive size policy maximum GC pause time goal in msec, " \ 2057 "or (G1 Only) the max. GC time per MMU time slice") \ 2058 \ 2059 product(uintx, GCPauseIntervalMillis, 0, \ 2060 "Time slice for MMU specification") \ 2061 \ 2062 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2063 "Adaptive size policy maximum GC minor pause time goal in msec") \ 2064 \ 2065 product(uintx, GCTimeRatio, 99, \ 2066 "Adaptive size policy application time to GC time ratio") \ 2067 \ 2068 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2069 "Adaptive size scale down factor for shrinking") \ 2070 \ 2071 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2072 "Adaptive size decays the major cost for long major intervals") \ 2073 \ 2074 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2075 "Time scale over which major costs decay") \ 2076 \ 2077 product(uintx, MinSurvivorRatio, 3, \ 2078 "Minimum ratio of young generation/survivor space size") \ 2079 \ 2080 product(uintx, InitialSurvivorRatio, 8, \ 2081 "Initial ratio of eden/survivor space size") \ 2082 \ 2083 product(uintx, BaseFootPrintEstimate, 256*M, \ 2084 "Estimate of footprint other than Java Heap") \ 2085 \ 2086 product(bool, UseGCOverheadLimit, true, \ 2087 "Use policy to limit of proportion of time spent in GC " \ 2088 "before an OutOfMemory error is thrown") \ 2089 \ 2090 product(uintx, GCTimeLimit, 98, \ 2091 "Limit of proportion of time spent in GC before an OutOfMemory" \ 2092 "error is thrown (used with GCHeapFreeLimit)") \ 2093 \ 2094 product(uintx, GCHeapFreeLimit, 2, \ 2095 "Minimum percentage of free space after a full GC before an " \ 2096 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2097 \ 2098 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2099 "Number of consecutive collections before gc time limit fires") \ 2100 \ 2101 product(bool, PrintAdaptiveSizePolicy, false, \ 2102 "Print information about AdaptiveSizePolicy") \ 2103 \ 2104 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2105 "How far ahead to prefetch destination area (<= 0 means off)") \ 2106 \ 2107 product(intx, PrefetchScanIntervalInBytes, -1, \ 2108 "How far ahead to prefetch scan area (<= 0 means off)") \ 2109 \ 2110 product(intx, PrefetchFieldsAhead, -1, \ 2111 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2112 \ 2113 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2114 "Verify system before exiting") \ 2115 \ 2116 diagnostic(bool, VerifyBeforeGC, false, \ 2117 "Verify memory system before GC") \ 2118 \ 2119 diagnostic(bool, VerifyAfterGC, false, \ 2120 "Verify memory system after GC") \ 2121 \ 2122 diagnostic(bool, VerifyDuringGC, false, \ 2123 "Verify memory system during GC (between phases)") \ 2124 \ 2125 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2126 "Enable parallel memory system verification") \ 2127 \ 2128 diagnostic(bool, DeferInitialCardMark, false, \ 2129 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2130 "may arise from new_pre_store_barrier") \ 2131 \ 2132 diagnostic(bool, VerifyRememberedSets, false, \ 2133 "Verify GC remembered sets") \ 2134 \ 2135 diagnostic(bool, VerifyObjectStartArray, true, \ 2136 "Verify GC object start array if verify before/after") \ 2137 \ 2138 product(bool, DisableExplicitGC, false, \ 2139 "Tells whether calling System.gc() does a full GC") \ 2140 \ 2141 notproduct(bool, CheckMemoryInitialization, false, \ 2142 "Checks memory initialization") \ 2143 \ 2144 product(bool, CollectGen0First, false, \ 2145 "Collect youngest generation before each full GC") \ 2146 \ 2147 diagnostic(bool, BindCMSThreadToCPU, false, \ 2148 "Bind CMS Thread to CPU if possible") \ 2149 \ 2150 diagnostic(uintx, CPUForCMSThread, 0, \ 2151 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2152 \ 2153 product(bool, BindGCTaskThreadsToCPUs, false, \ 2154 "Bind GCTaskThreads to CPUs if possible") \ 2155 \ 2156 product(bool, UseGCTaskAffinity, false, \ 2157 "Use worker affinity when asking for GCTasks") \ 2158 \ 2159 product(uintx, ProcessDistributionStride, 4, \ 2160 "Stride through processors when distributing processes") \ 2161 \ 2162 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2163 "number of times the coordinator GC thread will sleep while " \ 2164 "yielding before giving up and resuming GC") \ 2165 \ 2166 product(uintx, CMSYieldSleepCount, 0, \ 2167 "number of times a GC thread (minus the coordinator) " \ 2168 "will sleep while yielding before giving up and resuming GC") \ 2169 \ 2170 /* gc tracing */ \ 2171 manageable(bool, PrintGC, false, \ 2172 "Print message at garbage collect") \ 2173 \ 2174 manageable(bool, PrintGCDetails, false, \ 2175 "Print more details at garbage collect") \ 2176 \ 2177 manageable(bool, PrintGCDateStamps, false, \ 2178 "Print date stamps at garbage collect") \ 2179 \ 2180 manageable(bool, PrintGCTimeStamps, false, \ 2181 "Print timestamps at garbage collect") \ 2182 \ 2183 product(bool, PrintGCTaskTimeStamps, false, \ 2184 "Print timestamps for individual gc worker thread tasks") \ 2185 \ 2186 develop(intx, ConcGCYieldTimeout, 0, \ 2187 "If non-zero, assert that GC threads yield within this # of ms.") \ 2188 \ 2189 notproduct(bool, TraceMarkSweep, false, \ 2190 "Trace mark sweep") \ 2191 \ 2192 product(bool, PrintReferenceGC, false, \ 2193 "Print times spent handling reference objects during GC " \ 2194 " (enabled only when PrintGCDetails)") \ 2195 \ 2196 develop(bool, TraceReferenceGC, false, \ 2197 "Trace handling of soft/weak/final/phantom references") \ 2198 \ 2199 develop(bool, TraceFinalizerRegistration, false, \ 2200 "Trace registration of final references") \ 2201 \ 2202 notproduct(bool, TraceScavenge, false, \ 2203 "Trace scavenge") \ 2204 \ 2205 product_rw(bool, TraceClassLoading, false, \ 2206 "Trace all classes loaded") \ 2207 \ 2208 product(bool, TraceClassLoadingPreorder, false, \ 2209 "Trace all classes loaded in order referenced (not loaded)") \ 2210 \ 2211 product_rw(bool, TraceClassUnloading, false, \ 2212 "Trace unloading of classes") \ 2213 \ 2214 product_rw(bool, TraceLoaderConstraints, false, \ 2215 "Trace loader constraints") \ 2216 \ 2217 develop(bool, TraceClassLoaderData, false, \ 2218 "Trace class loader loader_data lifetime") \ 2219 \ 2220 product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2221 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2222 "Initial size of the boot class loader data metaspace") \ 2223 \ 2224 product(bool, TraceGen0Time, false, \ 2225 "Trace accumulated time for Gen 0 collection") \ 2226 \ 2227 product(bool, TraceGen1Time, false, \ 2228 "Trace accumulated time for Gen 1 collection") \ 2229 \ 2230 product(bool, PrintTenuringDistribution, false, \ 2231 "Print tenuring age information") \ 2232 \ 2233 product_rw(bool, PrintHeapAtGC, false, \ 2234 "Print heap layout before and after each GC") \ 2235 \ 2236 product_rw(bool, PrintHeapAtGCExtended, false, \ 2237 "Prints extended information about the layout of the heap " \ 2238 "when -XX:+PrintHeapAtGC is set") \ 2239 \ 2240 product(bool, PrintHeapAtSIGBREAK, true, \ 2241 "Print heap layout in response to SIGBREAK") \ 2242 \ 2243 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2244 "Print a class histogram before any major stop-world GC") \ 2245 \ 2246 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2247 "Print a class histogram after any major stop-world GC") \ 2248 \ 2249 manageable(bool, PrintClassHistogram, false, \ 2250 "Print a histogram of class instances") \ 2251 \ 2252 develop(bool, TraceWorkGang, false, \ 2253 "Trace activities of work gangs") \ 2254 \ 2255 product(bool, TraceParallelOldGCTasks, false, \ 2256 "Trace multithreaded GC activity") \ 2257 \ 2258 develop(bool, TraceBlockOffsetTable, false, \ 2259 "Print BlockOffsetTable maps") \ 2260 \ 2261 develop(bool, TraceCardTableModRefBS, false, \ 2262 "Print CardTableModRefBS maps") \ 2263 \ 2264 develop(bool, TraceGCTaskManager, false, \ 2265 "Trace actions of the GC task manager") \ 2266 \ 2267 develop(bool, TraceGCTaskQueue, false, \ 2268 "Trace actions of the GC task queues") \ 2269 \ 2270 diagnostic(bool, TraceGCTaskThread, false, \ 2271 "Trace actions of the GC task threads") \ 2272 \ 2273 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2274 "Print the time taken by each parallel old gc phase." \ 2275 "PrintGCDetails must also be enabled.") \ 2276 \ 2277 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2278 "Trace parallel old gc marking phase") \ 2279 \ 2280 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2281 "Trace parallel old gc summary phase") \ 2282 \ 2283 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2284 "Trace parallel old gc compaction phase") \ 2285 \ 2286 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2287 "Trace parallel old gc dense prefix computation") \ 2288 \ 2289 develop(bool, IgnoreLibthreadGPFault, false, \ 2290 "Suppress workaround for libthread GP fault") \ 2291 \ 2292 product(bool, PrintJNIGCStalls, false, \ 2293 "Print diagnostic message when GC is stalled" \ 2294 "by JNI critical section") \ 2295 \ 2296 /* GC log rotation setting */ \ 2297 \ 2298 product(bool, UseGCLogFileRotation, false, \ 2299 "Prevent large gclog file for long running app. " \ 2300 "Requires -Xloggc:<filename>") \ 2301 \ 2302 product(uintx, NumberOfGCLogFiles, 0, \ 2303 "Number of gclog files in rotation, " \ 2304 "Default: 0, no rotation") \ 2305 \ 2306 product(uintx, GCLogFileSize, 0, \ 2307 "GC log file size, Default: 0 bytes, no rotation " \ 2308 "Only valid with UseGCLogFileRotation") \ 2309 \ 2310 /* JVMTI heap profiling */ \ 2311 \ 2312 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2313 "Trace JVMTI object tagging calls") \ 2314 \ 2315 diagnostic(bool, VerifyBeforeIteration, false, \ 2316 "Verify memory system before JVMTI iteration") \ 2317 \ 2318 /* compiler interface */ \ 2319 \ 2320 develop(bool, CIPrintCompilerName, false, \ 2321 "when CIPrint is active, print the name of the active compiler") \ 2322 \ 2323 develop(bool, CIPrintCompileQueue, false, \ 2324 "display the contents of the compile queue whenever a " \ 2325 "compilation is enqueued") \ 2326 \ 2327 develop(bool, CIPrintRequests, false, \ 2328 "display every request for compilation") \ 2329 \ 2330 product(bool, CITime, false, \ 2331 "collect timing information for compilation") \ 2332 \ 2333 develop(bool, CITimeEach, false, \ 2334 "display timing information after each successful compilation") \ 2335 \ 2336 develop(bool, CICountOSR, false, \ 2337 "use a separate counter when assigning ids to osr compilations") \ 2338 \ 2339 develop(bool, CICompileNatives, true, \ 2340 "compile native methods if supported by the compiler") \ 2341 \ 2342 develop_pd(bool, CICompileOSR, \ 2343 "compile on stack replacement methods if supported by the " \ 2344 "compiler") \ 2345 \ 2346 develop(bool, CIPrintMethodCodes, false, \ 2347 "print method bytecodes of the compiled code") \ 2348 \ 2349 develop(bool, CIPrintTypeFlow, false, \ 2350 "print the results of ciTypeFlow analysis") \ 2351 \ 2352 develop(bool, CITraceTypeFlow, false, \ 2353 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2354 \ 2355 develop(intx, OSROnlyBCI, -1, \ 2356 "OSR only at this bci. Negative values mean exclude that bci") \ 2357 \ 2358 /* compiler */ \ 2359 \ 2360 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2361 "Number of compiler threads to run") \ 2362 \ 2363 product(intx, CompilationPolicyChoice, 0, \ 2364 "which compilation policy (0/1)") \ 2365 \ 2366 develop(bool, UseStackBanging, true, \ 2367 "use stack banging for stack overflow checks (required for " \ 2368 "proper StackOverflow handling; disable only to measure cost " \ 2369 "of stackbanging)") \ 2370 \ 2371 develop(bool, UseStrictFP, true, \ 2372 "use strict fp if modifier strictfp is set") \ 2373 \ 2374 develop(bool, GenerateSynchronizationCode, true, \ 2375 "generate locking/unlocking code for synchronized methods and " \ 2376 "monitors") \ 2377 \ 2378 develop(bool, GenerateCompilerNullChecks, true, \ 2379 "Generate explicit null checks for loads/stores/calls") \ 2380 \ 2381 develop(bool, GenerateRangeChecks, true, \ 2382 "Generate range checks for array accesses") \ 2383 \ 2384 develop_pd(bool, ImplicitNullChecks, \ 2385 "generate code for implicit null checks") \ 2386 \ 2387 product(bool, PrintSafepointStatistics, false, \ 2388 "print statistics about safepoint synchronization") \ 2389 \ 2390 product(intx, PrintSafepointStatisticsCount, 300, \ 2391 "total number of safepoint statistics collected " \ 2392 "before printing them out") \ 2393 \ 2394 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2395 "print safepoint statistics only when safepoint takes" \ 2396 " more than PrintSafepointSatisticsTimeout in millis") \ 2397 \ 2398 product(bool, TraceSafepointCleanupTime, false, \ 2399 "print the break down of clean up tasks performed during" \ 2400 " safepoint") \ 2401 \ 2402 product(bool, Inline, true, \ 2403 "enable inlining") \ 2404 \ 2405 product(bool, ClipInlining, true, \ 2406 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2407 \ 2408 develop(bool, UseCHA, true, \ 2409 "enable CHA") \ 2410 \ 2411 product(bool, UseTypeProfile, true, \ 2412 "Check interpreter profile for historically monomorphic calls") \ 2413 \ 2414 notproduct(bool, TimeCompiler, false, \ 2415 "time the compiler") \ 2416 \ 2417 diagnostic(bool, PrintInlining, false, \ 2418 "prints inlining optimizations") \ 2419 \ 2420 product(bool, UsePopCountInstruction, false, \ 2421 "Use population count instruction") \ 2422 \ 2423 develop(bool, EagerInitialization, false, \ 2424 "Eagerly initialize classes if possible") \ 2425 \ 2426 develop(bool, TraceMethodReplacement, false, \ 2427 "Print when methods are replaced do to recompilation") \ 2428 \ 2429 develop(bool, PrintMethodFlushing, false, \ 2430 "print the nmethods being flushed") \ 2431 \ 2432 develop(bool, UseRelocIndex, false, \ 2433 "use an index to speed random access to relocations") \ 2434 \ 2435 develop(bool, StressCodeBuffers, false, \ 2436 "Exercise code buffer expansion and other rare state changes") \ 2437 \ 2438 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2439 "Generate extra debugging info for non-safepoints in nmethods") \ 2440 \ 2441 product(bool, PrintVMOptions, false, \ 2442 "Print flags that appeared on the command line") \ 2443 \ 2444 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2445 "Ignore unrecognized VM options") \ 2446 \ 2447 product(bool, PrintCommandLineFlags, false, \ 2448 "Print flags specified on command line or set by ergonomics") \ 2449 \ 2450 product(bool, PrintFlagsInitial, false, \ 2451 "Print all VM flags before argument processing and exit VM") \ 2452 \ 2453 product(bool, PrintFlagsFinal, false, \ 2454 "Print all VM flags after argument and ergonomic processing") \ 2455 \ 2456 notproduct(bool, PrintFlagsWithComments, false, \ 2457 "Print all VM flags with default values and descriptions and exit")\ 2458 \ 2459 diagnostic(bool, SerializeVMOutput, true, \ 2460 "Use a mutex to serialize output to tty and hotspot.log") \ 2461 \ 2462 diagnostic(bool, DisplayVMOutput, true, \ 2463 "Display all VM output on the tty, independently of LogVMOutput") \ 2464 \ 2465 diagnostic(bool, LogVMOutput, trueInDebug, \ 2466 "Save VM output to hotspot.log, or to LogFile") \ 2467 \ 2468 diagnostic(ccstr, LogFile, NULL, \ 2469 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2470 \ 2471 product(ccstr, ErrorFile, NULL, \ 2472 "If an error occurs, save the error data to this file " \ 2473 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2474 \ 2475 product(bool, DisplayVMOutputToStderr, false, \ 2476 "If DisplayVMOutput is true, display all VM output to stderr") \ 2477 \ 2478 product(bool, DisplayVMOutputToStdout, false, \ 2479 "If DisplayVMOutput is true, display all VM output to stdout") \ 2480 \ 2481 product(bool, UseHeavyMonitors, false, \ 2482 "use heavyweight instead of lightweight Java monitors") \ 2483 \ 2484 product(bool, PrintStringTableStatistics, false, \ 2485 "print statistics about the StringTable and SymbolTable") \ 2486 \ 2487 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2488 "print histogram of the symbol table") \ 2489 \ 2490 notproduct(bool, ExitVMOnVerifyError, false, \ 2491 "standard exit from VM if bytecode verify error " \ 2492 "(only in debug mode)") \ 2493 \ 2494 notproduct(ccstr, AbortVMOnException, NULL, \ 2495 "Call fatal if this exception is thrown. Example: " \ 2496 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2497 \ 2498 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2499 "Call fatal if the exception pointed by AbortVMOnException " \ 2500 "has this message.") \ 2501 \ 2502 develop(bool, DebugVtables, false, \ 2503 "add debugging code to vtable dispatch") \ 2504 \ 2505 develop(bool, PrintVtables, false, \ 2506 "print vtables when printing klass") \ 2507 \ 2508 notproduct(bool, PrintVtableStats, false, \ 2509 "print vtables stats at end of run") \ 2510 \ 2511 develop(bool, TraceCreateZombies, false, \ 2512 "trace creation of zombie nmethods") \ 2513 \ 2514 notproduct(bool, IgnoreLockingAssertions, false, \ 2515 "disable locking assertions (for speed)") \ 2516 \ 2517 product(bool, RangeCheckElimination, true, \ 2518 "Split loop iterations to eliminate range checks") \ 2519 \ 2520 develop_pd(bool, UncommonNullCast, \ 2521 "track occurrences of null in casts; adjust compiler tactics") \ 2522 \ 2523 develop(bool, TypeProfileCasts, true, \ 2524 "treat casts like calls for purposes of type profiling") \ 2525 \ 2526 develop(bool, DelayCompilationDuringStartup, true, \ 2527 "Delay invoking the compiler until main application class is " \ 2528 "loaded") \ 2529 \ 2530 develop(bool, CompileTheWorld, false, \ 2531 "Compile all methods in all classes in bootstrap class path " \ 2532 "(stress test)") \ 2533 \ 2534 develop(bool, CompileTheWorldPreloadClasses, true, \ 2535 "Preload all classes used by a class before start loading") \ 2536 \ 2537 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2538 "Force a safepoint every n compiles so sweeper can keep up") \ 2539 \ 2540 develop(bool, FillDelaySlots, true, \ 2541 "Fill delay slots (on SPARC only)") \ 2542 \ 2543 develop(bool, TimeLivenessAnalysis, false, \ 2544 "Time computation of bytecode liveness analysis") \ 2545 \ 2546 develop(bool, TraceLivenessGen, false, \ 2547 "Trace the generation of liveness analysis information") \ 2548 \ 2549 notproduct(bool, TraceLivenessQuery, false, \ 2550 "Trace queries of liveness analysis information") \ 2551 \ 2552 notproduct(bool, CollectIndexSetStatistics, false, \ 2553 "Collect information about IndexSets") \ 2554 \ 2555 develop(bool, UseLoopSafepoints, true, \ 2556 "Generate Safepoint nodes in every loop") \ 2557 \ 2558 develop(intx, FastAllocateSizeLimit, 128*K, \ 2559 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2560 "Inline allocations larger than this in doublewords must go slow")\ 2561 \ 2562 product(bool, AggressiveOpts, false, \ 2563 "Enable aggressive optimizations - see arguments.cpp") \ 2564 \ 2565 product(bool, UseStringCache, false, \ 2566 "Enable String cache capabilities on String.java") \ 2567 \ 2568 /* statistics */ \ 2569 develop(bool, CountCompiledCalls, false, \ 2570 "counts method invocations") \ 2571 \ 2572 notproduct(bool, CountRuntimeCalls, false, \ 2573 "counts VM runtime calls") \ 2574 \ 2575 develop(bool, CountJNICalls, false, \ 2576 "counts jni method invocations") \ 2577 \ 2578 notproduct(bool, CountJVMCalls, false, \ 2579 "counts jvm method invocations") \ 2580 \ 2581 notproduct(bool, CountRemovableExceptions, false, \ 2582 "count exceptions that could be replaced by branches due to " \ 2583 "inlining") \ 2584 \ 2585 notproduct(bool, ICMissHistogram, false, \ 2586 "produce histogram of IC misses") \ 2587 \ 2588 notproduct(bool, PrintClassStatistics, false, \ 2589 "prints class statistics at end of run") \ 2590 \ 2591 notproduct(bool, PrintMethodStatistics, false, \ 2592 "prints method statistics at end of run") \ 2593 \ 2594 /* interpreter */ \ 2595 develop(bool, ClearInterpreterLocals, false, \ 2596 "Always clear local variables of interpreter activations upon " \ 2597 "entry") \ 2598 \ 2599 product_pd(bool, RewriteBytecodes, \ 2600 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2601 \ 2602 product_pd(bool, RewriteFrequentPairs, \ 2603 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2604 \ 2605 diagnostic(bool, PrintInterpreter, false, \ 2606 "Prints the generated interpreter code") \ 2607 \ 2608 product(bool, UseInterpreter, true, \ 2609 "Use interpreter for non-compiled methods") \ 2610 \ 2611 develop(bool, UseFastSignatureHandlers, true, \ 2612 "Use fast signature handlers for native calls") \ 2613 \ 2614 product(bool, UseLoopCounter, true, \ 2615 "Increment invocation counter on backward branch") \ 2616 \ 2617 product(bool, UseFastEmptyMethods, true, \ 2618 "Use fast method entry code for empty methods") \ 2619 \ 2620 product(bool, UseFastAccessorMethods, true, \ 2621 "Use fast method entry code for accessor methods") \ 2622 \ 2623 product_pd(bool, UseOnStackReplacement, \ 2624 "Use on stack replacement, calls runtime if invoc. counter " \ 2625 "overflows in loop") \ 2626 \ 2627 notproduct(bool, TraceOnStackReplacement, false, \ 2628 "Trace on stack replacement") \ 2629 \ 2630 product_pd(bool, PreferInterpreterNativeStubs, \ 2631 "Use always interpreter stubs for native methods invoked via " \ 2632 "interpreter") \ 2633 \ 2634 develop(bool, CountBytecodes, false, \ 2635 "Count number of bytecodes executed") \ 2636 \ 2637 develop(bool, PrintBytecodeHistogram, false, \ 2638 "Print histogram of the executed bytecodes") \ 2639 \ 2640 develop(bool, PrintBytecodePairHistogram, false, \ 2641 "Print histogram of the executed bytecode pairs") \ 2642 \ 2643 diagnostic(bool, PrintSignatureHandlers, false, \ 2644 "Print code generated for native method signature handlers") \ 2645 \ 2646 develop(bool, VerifyOops, false, \ 2647 "Do plausibility checks for oops") \ 2648 \ 2649 develop(bool, CheckUnhandledOops, false, \ 2650 "Check for unhandled oops in VM code") \ 2651 \ 2652 develop(bool, VerifyJNIFields, trueInDebug, \ 2653 "Verify jfieldIDs for instance fields") \ 2654 \ 2655 notproduct(bool, VerifyJNIEnvThread, false, \ 2656 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2657 "from JNI") \ 2658 \ 2659 develop(bool, VerifyFPU, false, \ 2660 "Verify FPU state (check for NaN's, etc.)") \ 2661 \ 2662 develop(bool, VerifyThread, false, \ 2663 "Watch the thread register for corruption (SPARC only)") \ 2664 \ 2665 develop(bool, VerifyActivationFrameSize, false, \ 2666 "Verify that activation frame didn't become smaller than its " \ 2667 "minimal size") \ 2668 \ 2669 develop(bool, TraceFrequencyInlining, false, \ 2670 "Trace frequency based inlining") \ 2671 \ 2672 develop_pd(bool, InlineIntrinsics, \ 2673 "Inline intrinsics that can be statically resolved") \ 2674 \ 2675 product_pd(bool, ProfileInterpreter, \ 2676 "Profile at the bytecode level during interpretation") \ 2677 \ 2678 develop_pd(bool, ProfileTraps, \ 2679 "Profile deoptimization traps at the bytecode level") \ 2680 \ 2681 product(intx, ProfileMaturityPercentage, 20, \ 2682 "number of method invocations/branches (expressed as % of " \ 2683 "CompileThreshold) before using the method's profile") \ 2684 \ 2685 develop(bool, PrintMethodData, false, \ 2686 "Print the results of +ProfileInterpreter at end of run") \ 2687 \ 2688 develop(bool, VerifyDataPointer, trueInDebug, \ 2689 "Verify the method data pointer during interpreter profiling") \ 2690 \ 2691 develop(bool, VerifyCompiledCode, false, \ 2692 "Include miscellaneous runtime verifications in nmethod code; " \ 2693 "default off because it disturbs nmethod size heuristics") \ 2694 \ 2695 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2696 "Manually make GC thread crash then dump java stack trace; " \ 2697 "Test only") \ 2698 \ 2699 /* compilation */ \ 2700 product(bool, UseCompiler, true, \ 2701 "use compilation") \ 2702 \ 2703 develop(bool, TraceCompilationPolicy, false, \ 2704 "Trace compilation policy") \ 2705 \ 2706 develop(bool, TimeCompilationPolicy, false, \ 2707 "Time the compilation policy") \ 2708 \ 2709 product(bool, UseCounterDecay, true, \ 2710 "adjust recompilation counters") \ 2711 \ 2712 develop(intx, CounterHalfLifeTime, 30, \ 2713 "half-life time of invocation counters (in secs)") \ 2714 \ 2715 develop(intx, CounterDecayMinIntervalLength, 500, \ 2716 "Min. ms. between invocation of CounterDecay") \ 2717 \ 2718 product(bool, AlwaysCompileLoopMethods, false, \ 2719 "when using recompilation, never interpret methods " \ 2720 "containing loops") \ 2721 \ 2722 product(bool, DontCompileHugeMethods, true, \ 2723 "don't compile methods > HugeMethodLimit") \ 2724 \ 2725 /* Bytecode escape analysis estimation. */ \ 2726 product(bool, EstimateArgEscape, true, \ 2727 "Analyze bytecodes to estimate escape state of arguments") \ 2728 \ 2729 product(intx, BCEATraceLevel, 0, \ 2730 "How much tracing to do of bytecode escape analysis estimates") \ 2731 \ 2732 product(intx, MaxBCEAEstimateLevel, 5, \ 2733 "Maximum number of nested calls that are analyzed by BC EA.") \ 2734 \ 2735 product(intx, MaxBCEAEstimateSize, 150, \ 2736 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2737 \ 2738 product(intx, AllocatePrefetchStyle, 1, \ 2739 "0 = no prefetch, " \ 2740 "1 = prefetch instructions for each allocation, " \ 2741 "2 = use TLAB watermark to gate allocation prefetch, " \ 2742 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2743 \ 2744 product(intx, AllocatePrefetchDistance, -1, \ 2745 "Distance to prefetch ahead of allocation pointer") \ 2746 \ 2747 product(intx, AllocatePrefetchLines, 3, \ 2748 "Number of lines to prefetch ahead of array allocation pointer") \ 2749 \ 2750 product(intx, AllocateInstancePrefetchLines, 1, \ 2751 "Number of lines to prefetch ahead of instance allocation pointer") \ 2752 \ 2753 product(intx, AllocatePrefetchStepSize, 16, \ 2754 "Step size in bytes of sequential prefetch instructions") \ 2755 \ 2756 product(intx, AllocatePrefetchInstr, 0, \ 2757 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2758 \ 2759 /* deoptimization */ \ 2760 develop(bool, TraceDeoptimization, false, \ 2761 "Trace deoptimization") \ 2762 \ 2763 develop(bool, DebugDeoptimization, false, \ 2764 "Tracing various information while debugging deoptimization") \ 2765 \ 2766 product(intx, SelfDestructTimer, 0, \ 2767 "Will cause VM to terminate after a given time (in minutes) " \ 2768 "(0 means off)") \ 2769 \ 2770 product(intx, MaxJavaStackTraceDepth, 1024, \ 2771 "Max. no. of lines in the stack trace for Java exceptions " \ 2772 "(0 means all)") \ 2773 \ 2774 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2775 "Guarantee a safepoint (at least) every so many milliseconds " \ 2776 "(0 means none)")) \ 2777 \ 2778 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2779 "Guarantee a safepoint (at least) every so many milliseconds " \ 2780 "(0 means none)")) \ 2781 \ 2782 product(intx, SafepointTimeoutDelay, 10000, \ 2783 "Delay in milliseconds for option SafepointTimeout") \ 2784 \ 2785 product(intx, NmethodSweepFraction, 16, \ 2786 "Number of invocations of sweeper to cover all nmethods") \ 2787 \ 2788 product(intx, NmethodSweepCheckInterval, 5, \ 2789 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2790 \ 2791 notproduct(bool, LogSweeper, false, \ 2792 "Keep a ring buffer of sweeper activity") \ 2793 \ 2794 notproduct(intx, SweeperLogEntries, 1024, \ 2795 "Number of records in the ring buffer of sweeper activity") \ 2796 \ 2797 notproduct(intx, MemProfilingInterval, 500, \ 2798 "Time between each invocation of the MemProfiler") \ 2799 \ 2800 develop(intx, MallocCatchPtr, -1, \ 2801 "Hit breakpoint when mallocing/freeing this pointer") \ 2802 \ 2803 notproduct(intx, AssertRepeat, 1, \ 2804 "number of times to evaluate expression in assert " \ 2805 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2806 \ 2807 notproduct(ccstrlist, SuppressErrorAt, "", \ 2808 "List of assertions (file:line) to muzzle") \ 2809 \ 2810 notproduct(uintx, HandleAllocationLimit, 1024, \ 2811 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2812 "is used") \ 2813 \ 2814 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2815 "Threshold for total handle allocation when " \ 2816 "+TraceHandleAllocation is used") \ 2817 \ 2818 develop(intx, StackPrintLimit, 100, \ 2819 "number of stack frames to print in VM-level stack dump") \ 2820 \ 2821 notproduct(intx, MaxElementPrintSize, 256, \ 2822 "maximum number of elements to print") \ 2823 \ 2824 notproduct(intx, MaxSubklassPrintSize, 4, \ 2825 "maximum number of subklasses to print when printing klass") \ 2826 \ 2827 product(intx, MaxInlineLevel, 9, \ 2828 "maximum number of nested calls that are inlined") \ 2829 \ 2830 product(intx, MaxRecursiveInlineLevel, 1, \ 2831 "maximum number of nested recursive calls that are inlined") \ 2832 \ 2833 product_pd(intx, InlineSmallCode, \ 2834 "Only inline already compiled methods if their code size is " \ 2835 "less than this") \ 2836 \ 2837 product(intx, MaxInlineSize, 35, \ 2838 "maximum bytecode size of a method to be inlined") \ 2839 \ 2840 product_pd(intx, FreqInlineSize, \ 2841 "maximum bytecode size of a frequent method to be inlined") \ 2842 \ 2843 product(intx, MaxTrivialSize, 6, \ 2844 "maximum bytecode size of a trivial method to be inlined") \ 2845 \ 2846 product(intx, MinInliningThreshold, 250, \ 2847 "min. invocation count a method needs to have to be inlined") \ 2848 \ 2849 develop(intx, MethodHistogramCutoff, 100, \ 2850 "cutoff value for method invoc. histogram (+CountCalls)") \ 2851 \ 2852 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2853 "# of interpreted methods to show in profile") \ 2854 \ 2855 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2856 "# of compiled methods to show in profile") \ 2857 \ 2858 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2859 "# of stub methods to show in profile") \ 2860 \ 2861 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2862 "# of runtime stub nodes to show in profile") \ 2863 \ 2864 product(intx, ProfileIntervalsTicks, 100, \ 2865 "# of ticks between printing of interval profile " \ 2866 "(+ProfileIntervals)") \ 2867 \ 2868 notproduct(intx, ScavengeALotInterval, 1, \ 2869 "Interval between which scavenge will occur with +ScavengeALot") \ 2870 \ 2871 notproduct(intx, FullGCALotInterval, 1, \ 2872 "Interval between which full gc will occur with +FullGCALot") \ 2873 \ 2874 notproduct(intx, FullGCALotStart, 0, \ 2875 "For which invocation to start FullGCAlot") \ 2876 \ 2877 notproduct(intx, FullGCALotDummies, 32*K, \ 2878 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2879 "to move") \ 2880 \ 2881 develop(intx, DontYieldALotInterval, 10, \ 2882 "Interval between which yields will be dropped (milliseconds)") \ 2883 \ 2884 develop(intx, MinSleepInterval, 1, \ 2885 "Minimum sleep() interval (milliseconds) when " \ 2886 "ConvertSleepToYield is off (used for SOLARIS)") \ 2887 \ 2888 develop(intx, ProfilerPCTickThreshold, 15, \ 2889 "Number of ticks in a PC buckets to be a hotspot") \ 2890 \ 2891 notproduct(intx, DeoptimizeALotInterval, 5, \ 2892 "Number of exits until DeoptimizeALot kicks in") \ 2893 \ 2894 notproduct(intx, ZombieALotInterval, 5, \ 2895 "Number of exits until ZombieALot kicks in") \ 2896 \ 2897 develop(bool, StressNonEntrant, false, \ 2898 "Mark nmethods non-entrant at registration") \ 2899 \ 2900 diagnostic(intx, MallocVerifyInterval, 0, \ 2901 "if non-zero, verify C heap after every N calls to " \ 2902 "malloc/realloc/free") \ 2903 \ 2904 diagnostic(intx, MallocVerifyStart, 0, \ 2905 "if non-zero, start verifying C heap after Nth call to " \ 2906 "malloc/realloc/free") \ 2907 \ 2908 product(intx, TypeProfileWidth, 2, \ 2909 "number of receiver types to record in call/cast profile") \ 2910 \ 2911 develop(intx, BciProfileWidth, 2, \ 2912 "number of return bci's to record in ret profile") \ 2913 \ 2914 product(intx, PerMethodRecompilationCutoff, 400, \ 2915 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2916 \ 2917 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2918 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2919 \ 2920 product(intx, PerMethodTrapLimit, 100, \ 2921 "Limit on traps (of one kind) in a method (includes inlines)") \ 2922 \ 2923 product(intx, PerBytecodeTrapLimit, 4, \ 2924 "Limit on traps (of one kind) at a particular BCI") \ 2925 \ 2926 develop(intx, InlineFrequencyRatio, 20, \ 2927 "Ratio of call site execution to caller method invocation") \ 2928 \ 2929 develop_pd(intx, InlineFrequencyCount, \ 2930 "Count of call site execution necessary to trigger frequent " \ 2931 "inlining") \ 2932 \ 2933 develop(intx, InlineThrowCount, 50, \ 2934 "Force inlining of interpreted methods that throw this often") \ 2935 \ 2936 develop(intx, InlineThrowMaxSize, 200, \ 2937 "Force inlining of throwing methods smaller than this") \ 2938 \ 2939 develop(intx, ProfilerNodeSize, 1024, \ 2940 "Size in K to allocate for the Profile Nodes of each thread") \ 2941 \ 2942 product_pd(intx, PreInflateSpin, \ 2943 "Number of times to spin wait before inflation") \ 2944 \ 2945 /* gc parameters */ \ 2946 product(uintx, InitialHeapSize, 0, \ 2947 "Initial heap size (in bytes); zero means OldSize + NewSize") \ 2948 \ 2949 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 2950 "Maximum heap size (in bytes)") \ 2951 \ 2952 product(uintx, OldSize, ScaleForWordSize(4*M), \ 2953 "Initial tenured generation size (in bytes)") \ 2954 \ 2955 product(uintx, NewSize, ScaleForWordSize(1*M), \ 2956 "Initial new generation size (in bytes)") \ 2957 \ 2958 product(uintx, MaxNewSize, max_uintx, \ 2959 "Maximum new generation size (in bytes), max_uintx means set " \ 2960 "ergonomically") \ 2961 \ 2962 product(uintx, PretenureSizeThreshold, 0, \ 2963 "Maximum size in bytes of objects allocated in DefNew " \ 2964 "generation; zero means no maximum") \ 2965 \ 2966 product(uintx, TLABSize, 0, \ 2967 "Starting TLAB size (in bytes); zero means set ergonomically") \ 2968 \ 2969 product(uintx, MinTLABSize, 2*K, \ 2970 "Minimum allowed TLAB size (in bytes)") \ 2971 \ 2972 product(uintx, TLABAllocationWeight, 35, \ 2973 "Allocation averaging weight") \ 2974 \ 2975 product(uintx, TLABWasteTargetPercent, 1, \ 2976 "Percentage of Eden that can be wasted") \ 2977 \ 2978 product(uintx, TLABRefillWasteFraction, 64, \ 2979 "Max TLAB waste at a refill (internal fragmentation)") \ 2980 \ 2981 product(uintx, TLABWasteIncrement, 4, \ 2982 "Increment allowed waste at slow allocation") \ 2983 \ 2984 product(uintx, SurvivorRatio, 8, \ 2985 "Ratio of eden/survivor space size") \ 2986 \ 2987 product(uintx, NewRatio, 2, \ 2988 "Ratio of new/old generation sizes") \ 2989 \ 2990 product_pd(uintx, NewSizeThreadIncrease, \ 2991 "Additional size added to desired new generation size per " \ 2992 "non-daemon thread (in bytes)") \ 2993 \ 2994 product_pd(uintx, MetaspaceSize, \ 2995 "Initial size of Metaspaces (in bytes)") \ 2996 \ 2997 product(uintx, MaxMetaspaceSize, max_uintx, \ 2998 "Maximum size of Metaspaces (in bytes)") \ 2999 \ 3000 product(uintx, ClassMetaspaceSize, 2*M, \ 3001 "Maximum size of InstanceKlass area in Metaspace used for " \ 3002 "UseCompressedKlassPointers") \ 3003 \ 3004 product(uintx, MinHeapFreeRatio, 40, \ 3005 "Min percentage of heap free after GC to avoid expansion") \ 3006 \ 3007 product(uintx, MaxHeapFreeRatio, 70, \ 3008 "Max percentage of heap free after GC to avoid shrinking") \ 3009 \ 3010 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3011 "Number of milliseconds per MB of free space in the heap") \ 3012 \ 3013 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3014 "Min change in heap space due to GC (in bytes)") \ 3015 \ 3016 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3017 "Min expansion of Metaspace (in bytes)") \ 3018 \ 3019 product(uintx, MinMetaspaceFreeRatio, 40, \ 3020 "Min percentage of Metaspace free after GC to avoid expansion") \ 3021 \ 3022 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3023 "Max percentage of Metaspace free after GC to avoid shrinking") \ 3024 \ 3025 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3026 "Max expansion of Metaspace without full GC (in bytes)") \ 3027 \ 3028 product(intx, QueuedAllocationWarningCount, 0, \ 3029 "Number of times an allocation that queues behind a GC " \ 3030 "will retry before printing a warning") \ 3031 \ 3032 diagnostic(uintx, VerifyGCStartAt, 0, \ 3033 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3034 \ 3035 diagnostic(intx, VerifyGCLevel, 0, \ 3036 "Generation level at which to start +VerifyBefore/AfterGC") \ 3037 \ 3038 product(uintx, MaxTenuringThreshold, 15, \ 3039 "Maximum value for tenuring threshold") \ 3040 \ 3041 product(uintx, InitialTenuringThreshold, 7, \ 3042 "Initial value for tenuring threshold") \ 3043 \ 3044 product(uintx, TargetSurvivorRatio, 50, \ 3045 "Desired percentage of survivor space used after scavenge") \ 3046 \ 3047 product(uintx, MarkSweepDeadRatio, 5, \ 3048 "Percentage (0-100) of the old gen allowed as dead wood." \ 3049 "Serial mark sweep treats this as both the min and max value." \ 3050 "CMS uses this value only if it falls back to mark sweep." \ 3051 "Par compact uses a variable scale based on the density of the" \ 3052 "generation and treats this as the max value when the heap is" \ 3053 "either completely full or completely empty. Par compact also" \ 3054 "has a smaller default value; see arguments.cpp.") \ 3055 \ 3056 product(intx, MarkSweepAlwaysCompactCount, 4, \ 3057 "How often should we fully compact the heap (ignoring the dead " \ 3058 "space parameters)") \ 3059 \ 3060 product(intx, PrintCMSStatistics, 0, \ 3061 "Statistics for CMS") \ 3062 \ 3063 product(bool, PrintCMSInitiationStatistics, false, \ 3064 "Statistics for initiating a CMS collection") \ 3065 \ 3066 product(intx, PrintFLSStatistics, 0, \ 3067 "Statistics for CMS' FreeListSpace") \ 3068 \ 3069 product(intx, PrintFLSCensus, 0, \ 3070 "Census for CMS' FreeListSpace") \ 3071 \ 3072 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3073 "Delay in ms between expansion and allocation") \ 3074 \ 3075 develop(uintx, GCWorkerDelayMillis, 0, \ 3076 "Delay in ms in scheduling GC workers") \ 3077 \ 3078 product(intx, DeferThrSuspendLoopCount, 4000, \ 3079 "(Unstable) Number of times to iterate in safepoint loop " \ 3080 " before blocking VM threads ") \ 3081 \ 3082 product(intx, DeferPollingPageLoopCount, -1, \ 3083 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3084 "before changing safepoint polling page to RO ") \ 3085 \ 3086 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3087 \ 3088 product(bool, PSChunkLargeArrays, true, \ 3089 "true: process large arrays in chunks") \ 3090 \ 3091 product(uintx, GCDrainStackTargetSize, 64, \ 3092 "how many entries we'll try to leave on the stack during " \ 3093 "parallel GC") \ 3094 \ 3095 /* stack parameters */ \ 3096 product_pd(intx, StackYellowPages, \ 3097 "Number of yellow zone (recoverable overflows) pages") \ 3098 \ 3099 product_pd(intx, StackRedPages, \ 3100 "Number of red zone (unrecoverable overflows) pages") \ 3101 \ 3102 product_pd(intx, StackShadowPages, \ 3103 "Number of shadow zone (for overflow checking) pages" \ 3104 " this should exceed the depth of the VM and native call stack") \ 3105 \ 3106 product_pd(intx, ThreadStackSize, \ 3107 "Thread Stack Size (in Kbytes)") \ 3108 \ 3109 product_pd(intx, VMThreadStackSize, \ 3110 "Non-Java Thread Stack Size (in Kbytes)") \ 3111 \ 3112 product_pd(intx, CompilerThreadStackSize, \ 3113 "Compiler Thread Stack Size (in Kbytes)") \ 3114 \ 3115 develop_pd(uintx, JVMInvokeMethodSlack, \ 3116 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3117 \ 3118 product(uintx, ThreadSafetyMargin, 50*M, \ 3119 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3120 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3121 "disable this feature") \ 3122 \ 3123 /* code cache parameters */ \ 3124 develop(uintx, CodeCacheSegmentSize, 64, \ 3125 "Code cache segment size (in bytes) - smallest unit of " \ 3126 "allocation") \ 3127 \ 3128 develop_pd(intx, CodeEntryAlignment, \ 3129 "Code entry alignment for generated code (in bytes)") \ 3130 \ 3131 product_pd(intx, OptoLoopAlignment, \ 3132 "Align inner loops to zero relative to this modulus") \ 3133 \ 3134 product_pd(uintx, InitialCodeCacheSize, \ 3135 "Initial code cache size (in bytes)") \ 3136 \ 3137 product_pd(uintx, ReservedCodeCacheSize, \ 3138 "Reserved code cache size (in bytes) - maximum code cache size") \ 3139 \ 3140 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3141 "When less than X space left, we stop compiling.") \ 3142 \ 3143 product_pd(uintx, CodeCacheExpansionSize, \ 3144 "Code cache expansion size (in bytes)") \ 3145 \ 3146 develop_pd(uintx, CodeCacheMinBlockLength, \ 3147 "Minimum number of segments in a code cache block.") \ 3148 \ 3149 notproduct(bool, ExitOnFullCodeCache, false, \ 3150 "Exit the VM if we fill the code cache.") \ 3151 \ 3152 product(bool, UseCodeCacheFlushing, true, \ 3153 "Attempt to clean the code cache before shutting off compiler") \ 3154 \ 3155 product(intx, MinCodeCacheFlushingInterval, 30, \ 3156 "Min number of seconds between code cache cleaning sessions") \ 3157 \ 3158 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3159 "When less than X space left, start code cache cleaning") \ 3160 \ 3161 /* interpreter debugging */ \ 3162 develop(intx, BinarySwitchThreshold, 5, \ 3163 "Minimal number of lookupswitch entries for rewriting to binary " \ 3164 "switch") \ 3165 \ 3166 develop(intx, StopInterpreterAt, 0, \ 3167 "Stops interpreter execution at specified bytecode number") \ 3168 \ 3169 develop(intx, TraceBytecodesAt, 0, \ 3170 "Traces bytecodes starting with specified bytecode number") \ 3171 \ 3172 /* compiler interface */ \ 3173 develop(intx, CIStart, 0, \ 3174 "the id of the first compilation to permit") \ 3175 \ 3176 develop(intx, CIStop, -1, \ 3177 "the id of the last compilation to permit") \ 3178 \ 3179 develop(intx, CIStartOSR, 0, \ 3180 "the id of the first osr compilation to permit " \ 3181 "(CICountOSR must be on)") \ 3182 \ 3183 develop(intx, CIStopOSR, -1, \ 3184 "the id of the last osr compilation to permit " \ 3185 "(CICountOSR must be on)") \ 3186 \ 3187 develop(intx, CIBreakAtOSR, -1, \ 3188 "id of osr compilation to break at") \ 3189 \ 3190 develop(intx, CIBreakAt, -1, \ 3191 "id of compilation to break at") \ 3192 \ 3193 product(ccstrlist, CompileOnly, "", \ 3194 "List of methods (pkg/class.name) to restrict compilation to") \ 3195 \ 3196 product(ccstr, CompileCommandFile, NULL, \ 3197 "Read compiler commands from this file [.hotspot_compiler]") \ 3198 \ 3199 product(ccstrlist, CompileCommand, "", \ 3200 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3201 \ 3202 develop(bool, ReplayCompiles, false, \ 3203 "Enable replay of compilations from ReplayDataFile") \ 3204 \ 3205 develop(ccstr, ReplayDataFile, "replay.txt", \ 3206 "file containing compilation replay information") \ 3207 \ 3208 develop(intx, ReplaySuppressInitializers, 2, \ 3209 "Controls handling of class initialization during replay" \ 3210 "0 - don't do anything special" \ 3211 "1 - treat all class initializers as empty" \ 3212 "2 - treat class initializers for application classes as empty" \ 3213 "3 - allow all class initializers to run during bootstrap but" \ 3214 " pretend they are empty after starting replay") \ 3215 \ 3216 develop(bool, ReplayIgnoreInitErrors, false, \ 3217 "Ignore exceptions thrown during initialization for replay") \ 3218 \ 3219 develop(bool, DumpReplayDataOnError, true, \ 3220 "record replay data for crashing compiler threads") \ 3221 \ 3222 product(bool, CICompilerCountPerCPU, false, \ 3223 "1 compiler thread for log(N CPUs)") \ 3224 \ 3225 develop(intx, CIFireOOMAt, -1, \ 3226 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3227 "(non-negative value throws OOM after this many CI accesses " \ 3228 "in each compile)") \ 3229 \ 3230 notproduct(bool, CIObjectFactoryVerify, false, \ 3231 "enable potentially expensive verification in ciObjectFactory") \ 3232 \ 3233 /* Priorities */ \ 3234 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3235 \ 3236 product(intx, ThreadPriorityPolicy, 0, \ 3237 "0 : Normal. "\ 3238 " VM chooses priorities that are appropriate for normal "\ 3239 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3240 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3241 " map to lower native priority values. On Windows applications"\ 3242 " are allowed to use higher native priorities. However, with "\ 3243 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3244 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3245 " interfere with system threads. On Linux thread priorities "\ 3246 " are ignored because the OS does not support static priority "\ 3247 " in SCHED_OTHER scheduling class which is the only choice for"\ 3248 " non-root, non-realtime applications. "\ 3249 "1 : Aggressive. "\ 3250 " Java thread priorities map over to the entire range of "\ 3251 " native thread priorities. Higher Java thread priorities map "\ 3252 " to higher native thread priorities. This policy should be "\ 3253 " used with care, as sometimes it can cause performance "\ 3254 " degradation in the application and/or the entire system. On "\ 3255 " Linux this policy requires root privilege.") \ 3256 \ 3257 product(bool, ThreadPriorityVerbose, false, \ 3258 "Print priority changes") \ 3259 \ 3260 product(intx, DefaultThreadPriority, -1, \ 3261 "The native priority at which threads run if not elsewhere " \ 3262 "specified (-1 means no change)") \ 3263 \ 3264 product(intx, CompilerThreadPriority, -1, \ 3265 "The native priority at which compiler threads should run " \ 3266 "(-1 means no change)") \ 3267 \ 3268 product(intx, VMThreadPriority, -1, \ 3269 "The native priority at which the VM thread should run " \ 3270 "(-1 means no change)") \ 3271 \ 3272 product(bool, CompilerThreadHintNoPreempt, true, \ 3273 "(Solaris only) Give compiler threads an extra quanta") \ 3274 \ 3275 product(bool, VMThreadHintNoPreempt, false, \ 3276 "(Solaris only) Give VM thread an extra quanta") \ 3277 \ 3278 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3279 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3280 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3281 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3282 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3283 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3284 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3285 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3286 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3287 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3288 \ 3289 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3290 "Java thread priority 10 maps to critical scheduling priority") \ 3291 \ 3292 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3293 "Compiler thread(s) run at critical scheduling priority") \ 3294 \ 3295 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3296 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3297 \ 3298 /* compiler debugging */ \ 3299 notproduct(intx, CompileTheWorldStartAt, 1, \ 3300 "First class to consider when using +CompileTheWorld") \ 3301 \ 3302 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3303 "Last class to consider when using +CompileTheWorld") \ 3304 \ 3305 develop(intx, NewCodeParameter, 0, \ 3306 "Testing Only: Create a dedicated integer parameter before " \ 3307 "putback") \ 3308 \ 3309 /* new oopmap storage allocation */ \ 3310 develop(intx, MinOopMapAllocation, 8, \ 3311 "Minimum number of OopMap entries in an OopMapSet") \ 3312 \ 3313 /* Background Compilation */ \ 3314 develop(intx, LongCompileThreshold, 50, \ 3315 "Used with +TraceLongCompiles") \ 3316 \ 3317 product(intx, StarvationMonitorInterval, 200, \ 3318 "Pause between each check in ms") \ 3319 \ 3320 /* recompilation */ \ 3321 product_pd(intx, CompileThreshold, \ 3322 "number of interpreted method invocations before (re-)compiling") \ 3323 \ 3324 product_pd(intx, BackEdgeThreshold, \ 3325 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3326 \ 3327 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3328 "Interpreter (tier 0) invocation notification frequency.") \ 3329 \ 3330 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3331 "C1 without MDO (tier 2) invocation notification frequency.") \ 3332 \ 3333 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3334 "C1 with MDO profiling (tier 3) invocation notification " \ 3335 "frequency.") \ 3336 \ 3337 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3338 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3339 \ 3340 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3341 "Interpreter (tier 0) invocation notification frequency.") \ 3342 \ 3343 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3344 "C1 without MDO (tier 2) invocation notification frequency.") \ 3345 \ 3346 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3347 "C1 with MDO profiling (tier 3) invocation notification " \ 3348 "frequency.") \ 3349 \ 3350 product(intx, Tier2CompileThreshold, 0, \ 3351 "threshold at which tier 2 compilation is invoked") \ 3352 \ 3353 product(intx, Tier2BackEdgeThreshold, 0, \ 3354 "Back edge threshold at which tier 2 compilation is invoked") \ 3355 \ 3356 product(intx, Tier3InvocationThreshold, 200, \ 3357 "Compile if number of method invocations crosses this " \ 3358 "threshold") \ 3359 \ 3360 product(intx, Tier3MinInvocationThreshold, 100, \ 3361 "Minimum invocation to compile at tier 3") \ 3362 \ 3363 product(intx, Tier3CompileThreshold, 2000, \ 3364 "Threshold at which tier 3 compilation is invoked (invocation " \ 3365 "minimum must be satisfied.") \ 3366 \ 3367 product(intx, Tier3BackEdgeThreshold, 60000, \ 3368 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3369 \ 3370 product(intx, Tier4InvocationThreshold, 5000, \ 3371 "Compile if number of method invocations crosses this " \ 3372 "threshold") \ 3373 \ 3374 product(intx, Tier4MinInvocationThreshold, 600, \ 3375 "Minimum invocation to compile at tier 4") \ 3376 \ 3377 product(intx, Tier4CompileThreshold, 15000, \ 3378 "Threshold at which tier 4 compilation is invoked (invocation " \ 3379 "minimum must be satisfied.") \ 3380 \ 3381 product(intx, Tier4BackEdgeThreshold, 40000, \ 3382 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3383 \ 3384 product(intx, Tier3DelayOn, 5, \ 3385 "If C2 queue size grows over this amount per compiler thread " \ 3386 "stop compiling at tier 3 and start compiling at tier 2") \ 3387 \ 3388 product(intx, Tier3DelayOff, 2, \ 3389 "If C2 queue size is less than this amount per compiler thread " \ 3390 "allow methods compiled at tier 2 transition to tier 3") \ 3391 \ 3392 product(intx, Tier3LoadFeedback, 5, \ 3393 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3394 "reaches this amount per compiler thread") \ 3395 \ 3396 product(intx, Tier4LoadFeedback, 3, \ 3397 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3398 "reaches this amount per compiler thread") \ 3399 \ 3400 product(intx, TieredCompileTaskTimeout, 50, \ 3401 "Kill compile task if method was not used within " \ 3402 "given timeout in milliseconds") \ 3403 \ 3404 product(intx, TieredStopAtLevel, 4, \ 3405 "Stop at given compilation level") \ 3406 \ 3407 product(intx, Tier0ProfilingStartPercentage, 200, \ 3408 "Start profiling in interpreter if the counters exceed tier 3" \ 3409 "thresholds by the specified percentage") \ 3410 \ 3411 product(intx, TieredRateUpdateMinTime, 1, \ 3412 "Minimum rate sampling interval (in milliseconds)") \ 3413 \ 3414 product(intx, TieredRateUpdateMaxTime, 25, \ 3415 "Maximum rate sampling interval (in milliseconds)") \ 3416 \ 3417 product_pd(bool, TieredCompilation, \ 3418 "Enable tiered compilation") \ 3419 \ 3420 product(bool, PrintTieredEvents, false, \ 3421 "Print tiered events notifications") \ 3422 \ 3423 product_pd(intx, OnStackReplacePercentage, \ 3424 "NON_TIERED number of method invocations/branches (expressed as %"\ 3425 "of CompileThreshold) before (re-)compiling OSR code") \ 3426 \ 3427 product(intx, InterpreterProfilePercentage, 33, \ 3428 "NON_TIERED number of method invocations/branches (expressed as %"\ 3429 "of CompileThreshold) before profiling in the interpreter") \ 3430 \ 3431 develop(intx, MaxRecompilationSearchLength, 10, \ 3432 "max. # frames to inspect searching for recompilee") \ 3433 \ 3434 develop(intx, MaxInterpretedSearchLength, 3, \ 3435 "max. # interp. frames to skip when searching for recompilee") \ 3436 \ 3437 develop(intx, DesiredMethodLimit, 8000, \ 3438 "desired max. method size (in bytecodes) after inlining") \ 3439 \ 3440 develop(intx, HugeMethodLimit, 8000, \ 3441 "don't compile methods larger than this if " \ 3442 "+DontCompileHugeMethods") \ 3443 \ 3444 /* New JDK 1.4 reflection implementation */ \ 3445 \ 3446 develop(bool, UseNewReflection, true, \ 3447 "Temporary flag for transition to reflection based on dynamic " \ 3448 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3449 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3450 "changes were needed") \ 3451 \ 3452 develop(bool, VerifyReflectionBytecodes, false, \ 3453 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3454 "in situations like that described in 4486457 or for " \ 3455 "constructors generated for serialization, so can not be enabled "\ 3456 "in product.") \ 3457 \ 3458 product(bool, ReflectionWrapResolutionErrors, true, \ 3459 "Temporary flag for transition to AbstractMethodError wrapped " \ 3460 "in InvocationTargetException. See 6531596") \ 3461 \ 3462 \ 3463 develop(intx, FastSuperclassLimit, 8, \ 3464 "Depth of hardwired instanceof accelerator array") \ 3465 \ 3466 /* Properties for Java libraries */ \ 3467 \ 3468 product(uintx, MaxDirectMemorySize, 0, \ 3469 "Maximum total size of NIO direct-buffer allocations") \ 3470 \ 3471 /* temporary developer defined flags */ \ 3472 \ 3473 diagnostic(bool, UseNewCode, false, \ 3474 "Testing Only: Use the new version while testing") \ 3475 \ 3476 diagnostic(bool, UseNewCode2, false, \ 3477 "Testing Only: Use the new version while testing") \ 3478 \ 3479 diagnostic(bool, UseNewCode3, false, \ 3480 "Testing Only: Use the new version while testing") \ 3481 \ 3482 /* flags for performance data collection */ \ 3483 \ 3484 product(bool, UsePerfData, falseInEmbedded, \ 3485 "Flag to disable jvmstat instrumentation for performance testing" \ 3486 "and problem isolation purposes.") \ 3487 \ 3488 product(bool, PerfDataSaveToFile, false, \ 3489 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3490 \ 3491 product(ccstr, PerfDataSaveFile, NULL, \ 3492 "Save PerfData memory to the specified absolute pathname," \ 3493 "%p in the file name if present will be replaced by pid") \ 3494 \ 3495 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3496 "Data sampling interval in milliseconds") \ 3497 \ 3498 develop(bool, PerfTraceDataCreation, false, \ 3499 "Trace creation of Performance Data Entries") \ 3500 \ 3501 develop(bool, PerfTraceMemOps, false, \ 3502 "Trace PerfMemory create/attach/detach calls") \ 3503 \ 3504 product(bool, PerfDisableSharedMem, false, \ 3505 "Store performance data in standard memory") \ 3506 \ 3507 product(intx, PerfDataMemorySize, 32*K, \ 3508 "Size of performance data memory region. Will be rounded " \ 3509 "up to a multiple of the native os page size.") \ 3510 \ 3511 product(intx, PerfMaxStringConstLength, 1024, \ 3512 "Maximum PerfStringConstant string length before truncation") \ 3513 \ 3514 product(bool, PerfAllowAtExitRegistration, false, \ 3515 "Allow registration of atexit() methods") \ 3516 \ 3517 product(bool, PerfBypassFileSystemCheck, false, \ 3518 "Bypass Win32 file system criteria checks (Windows Only)") \ 3519 \ 3520 product(intx, UnguardOnExecutionViolation, 0, \ 3521 "Unguard page and retry on no-execute fault (Win32 only)" \ 3522 "0=off, 1=conservative, 2=aggressive") \ 3523 \ 3524 /* Serviceability Support */ \ 3525 \ 3526 product(bool, ManagementServer, false, \ 3527 "Create JMX Management Server") \ 3528 \ 3529 product(bool, DisableAttachMechanism, false, \ 3530 "Disable mechanism that allows tools to attach to this VM") \ 3531 \ 3532 product(bool, StartAttachListener, false, \ 3533 "Always start Attach Listener at VM startup") \ 3534 \ 3535 manageable(bool, PrintConcurrentLocks, false, \ 3536 "Print java.util.concurrent locks in thread dump") \ 3537 \ 3538 product(bool, TransmitErrorReport, false, \ 3539 "Enable error report transmission on erroneous termination") \ 3540 \ 3541 product(ccstr, ErrorReportServer, NULL, \ 3542 "Override built-in error report server address") \ 3543 \ 3544 /* Shared spaces */ \ 3545 \ 3546 product(bool, UseSharedSpaces, true, \ 3547 "Use shared spaces for metadata") \ 3548 \ 3549 product(bool, RequireSharedSpaces, false, \ 3550 "Require shared spaces for metadata") \ 3551 \ 3552 product(bool, DumpSharedSpaces, false, \ 3553 "Special mode: JVM reads a class list, loads classes, builds " \ 3554 "shared spaces, and dumps the shared spaces to a file to be " \ 3555 "used in future JVM runs.") \ 3556 \ 3557 product(bool, PrintSharedSpaces, false, \ 3558 "Print usage of shared spaces") \ 3559 \ 3560 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3561 "Size of read-write space for metadata (in bytes)") \ 3562 \ 3563 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3564 "Size of read-only space for metadata (in bytes)") \ 3565 \ 3566 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3567 "Size of the shared miscellaneous data area (in bytes)") \ 3568 \ 3569 product(uintx, SharedMiscCodeSize, 120*K, \ 3570 "Size of the shared miscellaneous code area (in bytes)") \ 3571 \ 3572 product(uintx, SharedDummyBlockSize, 0, \ 3573 "Size of dummy block used to shift heap addresses (in bytes)") \ 3574 \ 3575 diagnostic(bool, EnableInvokeDynamic, true, \ 3576 "support JSR 292 (method handles, invokedynamic, " \ 3577 "anonymous classes") \ 3578 \ 3579 diagnostic(bool, PrintMethodHandleStubs, false, \ 3580 "Print generated stub code for method handles") \ 3581 \ 3582 develop(bool, TraceMethodHandles, false, \ 3583 "trace internal method handle operations") \ 3584 \ 3585 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3586 "perform extra checks when constructing method handles") \ 3587 \ 3588 diagnostic(bool, ShowHiddenFrames, false, \ 3589 "show method handle implementation frames (usually hidden)") \ 3590 \ 3591 experimental(bool, TrustFinalNonStaticFields, false, \ 3592 "trust final non-static declarations for constant folding") \ 3593 \ 3594 develop(bool, TraceInvokeDynamic, false, \ 3595 "trace internal invoke dynamic operations") \ 3596 \ 3597 diagnostic(bool, PauseAtStartup, false, \ 3598 "Causes the VM to pause at startup time and wait for the pause " \ 3599 "file to be removed (default: ./vm.paused.<pid>)") \ 3600 \ 3601 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3602 "The file to create and for whose removal to await when pausing " \ 3603 "at startup. (default: ./vm.paused.<pid>)") \ 3604 \ 3605 diagnostic(bool, PauseAtExit, false, \ 3606 "Pause and wait for keypress on exit if a debugger is attached") \ 3607 \ 3608 product(bool, ExtendedDTraceProbes, false, \ 3609 "Enable performance-impacting dtrace probes") \ 3610 \ 3611 product(bool, DTraceMethodProbes, false, \ 3612 "Enable dtrace probes for method-entry and method-exit") \ 3613 \ 3614 product(bool, DTraceAllocProbes, false, \ 3615 "Enable dtrace probes for object allocation") \ 3616 \ 3617 product(bool, DTraceMonitorProbes, false, \ 3618 "Enable dtrace probes for monitor events") \ 3619 \ 3620 product(bool, RelaxAccessControlCheck, false, \ 3621 "Relax the access control checks in the verifier") \ 3622 \ 3623 diagnostic(bool, PrintDTraceDOF, false, \ 3624 "Print the DTrace DOF passed to the system for JSDT probes") \ 3625 \ 3626 product(uintx, StringTableSize, defaultStringTableSize, \ 3627 "Number of buckets in the interned String table") \ 3628 \ 3629 develop(bool, TraceDefaultMethods, false, \ 3630 "Trace the default method processing steps") \ 3631 \ 3632 develop(bool, ParseAllGenericSignatures, false, \ 3633 "Parse all generic signatures while classloading") \ 3634 \ 3635 develop(bool, VerifyGenericSignatures, false, \ 3636 "Abort VM on erroneous or inconsistent generic signatures") \ 3637 \ 3638 product(bool, UseVMInterruptibleIO, false, \ 3639 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3640 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3641 " of this flag is true for JDK 6 and earlier") \ 3642 \ 3643 diagnostic(bool, WhiteBoxAPI, false, \ 3644 "Enable internal testing APIs") \ 3645 \ 3646 product(bool, PrintGCCause, true, \ 3647 "Include GC cause in GC logging") 3648 3649/* 3650 * Macros for factoring of globals 3651 */ 3652 3653// Interface macros 3654#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3655#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3656#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3657#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3658#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3659#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3660#ifdef PRODUCT 3661#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3662#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3663#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3664#else 3665#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3666#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3667#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3668#endif 3669// Special LP64 flags, product only needed for now. 3670#ifdef _LP64 3671#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3672#else 3673#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3674#endif // _LP64 3675 3676// Implementation macros 3677#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3678#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3679#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3680#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3681#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3682#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3683#ifdef PRODUCT 3684#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3685#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3686#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3687#else 3688#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3689#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3690#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3691#endif 3692#ifdef _LP64 3693#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3694#else 3695#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3696#endif // _LP64 3697 3698RUNTIME_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) 3699 3700RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3701 3702ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3703 3704// Extensions 3705 3706#include "runtime/globals_ext.hpp" 3707 3708#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3709