globals.hpp revision 3534:1d7922586cf6
1/* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26#define SHARE_VM_RUNTIME_GLOBALS_HPP 27 28#include "utilities/debug.hpp" 29 30// use this for flags that are true per default in the tiered build 31// but false in non-tiered builds, and vice versa 32#ifdef TIERED 33#define trueInTiered true 34#define falseInTiered false 35#else 36#define trueInTiered false 37#define falseInTiered true 38#endif 39 40#ifdef TARGET_ARCH_x86 41# include "globals_x86.hpp" 42#endif 43#ifdef TARGET_ARCH_sparc 44# include "globals_sparc.hpp" 45#endif 46#ifdef TARGET_ARCH_zero 47# include "globals_zero.hpp" 48#endif 49#ifdef TARGET_ARCH_arm 50# include "globals_arm.hpp" 51#endif 52#ifdef TARGET_ARCH_ppc 53# include "globals_ppc.hpp" 54#endif 55#ifdef TARGET_OS_FAMILY_linux 56# include "globals_linux.hpp" 57#endif 58#ifdef TARGET_OS_FAMILY_solaris 59# include "globals_solaris.hpp" 60#endif 61#ifdef TARGET_OS_FAMILY_windows 62# include "globals_windows.hpp" 63#endif 64#ifdef TARGET_OS_FAMILY_bsd 65# include "globals_bsd.hpp" 66#endif 67#ifdef TARGET_OS_ARCH_linux_x86 68# include "globals_linux_x86.hpp" 69#endif 70#ifdef TARGET_OS_ARCH_linux_sparc 71# include "globals_linux_sparc.hpp" 72#endif 73#ifdef TARGET_OS_ARCH_linux_zero 74# include "globals_linux_zero.hpp" 75#endif 76#ifdef TARGET_OS_ARCH_solaris_x86 77# include "globals_solaris_x86.hpp" 78#endif 79#ifdef TARGET_OS_ARCH_solaris_sparc 80# include "globals_solaris_sparc.hpp" 81#endif 82#ifdef TARGET_OS_ARCH_windows_x86 83# include "globals_windows_x86.hpp" 84#endif 85#ifdef TARGET_OS_ARCH_linux_arm 86# include "globals_linux_arm.hpp" 87#endif 88#ifdef TARGET_OS_ARCH_linux_ppc 89# include "globals_linux_ppc.hpp" 90#endif 91#ifdef TARGET_OS_ARCH_bsd_x86 92# include "globals_bsd_x86.hpp" 93#endif 94#ifdef TARGET_OS_ARCH_bsd_zero 95# include "globals_bsd_zero.hpp" 96#endif 97#ifdef COMPILER1 98#ifdef TARGET_ARCH_x86 99# include "c1_globals_x86.hpp" 100#endif 101#ifdef TARGET_ARCH_sparc 102# include "c1_globals_sparc.hpp" 103#endif 104#ifdef TARGET_ARCH_arm 105# include "c1_globals_arm.hpp" 106#endif 107#ifdef TARGET_ARCH_ppc 108# include "c1_globals_ppc.hpp" 109#endif 110#ifdef TARGET_OS_FAMILY_linux 111# include "c1_globals_linux.hpp" 112#endif 113#ifdef TARGET_OS_FAMILY_solaris 114# include "c1_globals_solaris.hpp" 115#endif 116#ifdef TARGET_OS_FAMILY_windows 117# include "c1_globals_windows.hpp" 118#endif 119#ifdef TARGET_OS_FAMILY_bsd 120# include "c1_globals_bsd.hpp" 121#endif 122#endif 123#ifdef COMPILER2 124#ifdef TARGET_ARCH_x86 125# include "c2_globals_x86.hpp" 126#endif 127#ifdef TARGET_ARCH_sparc 128# include "c2_globals_sparc.hpp" 129#endif 130#ifdef TARGET_ARCH_arm 131# include "c2_globals_arm.hpp" 132#endif 133#ifdef TARGET_OS_FAMILY_linux 134# include "c2_globals_linux.hpp" 135#endif 136#ifdef TARGET_OS_FAMILY_solaris 137# include "c2_globals_solaris.hpp" 138#endif 139#ifdef TARGET_OS_FAMILY_windows 140# include "c2_globals_windows.hpp" 141#endif 142#ifdef TARGET_OS_FAMILY_bsd 143# include "c2_globals_bsd.hpp" 144#endif 145#endif 146#ifdef SHARK 147#ifdef TARGET_ARCH_zero 148# include "shark_globals_zero.hpp" 149#endif 150#endif 151 152#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 153define_pd_global(bool, BackgroundCompilation, false); 154define_pd_global(bool, UseTLAB, false); 155define_pd_global(bool, CICompileOSR, false); 156define_pd_global(bool, UseTypeProfile, false); 157define_pd_global(bool, UseOnStackReplacement, false); 158define_pd_global(bool, InlineIntrinsics, false); 159define_pd_global(bool, PreferInterpreterNativeStubs, true); 160define_pd_global(bool, ProfileInterpreter, false); 161define_pd_global(bool, ProfileTraps, false); 162define_pd_global(bool, TieredCompilation, false); 163 164define_pd_global(intx, CompileThreshold, 0); 165define_pd_global(intx, BackEdgeThreshold, 0); 166 167define_pd_global(intx, OnStackReplacePercentage, 0); 168define_pd_global(bool, ResizeTLAB, false); 169define_pd_global(intx, FreqInlineSize, 0); 170define_pd_global(intx, InlineSmallCode, 0); 171define_pd_global(intx, NewSizeThreadIncrease, 4*K); 172define_pd_global(intx, InlineClassNatives, true); 173define_pd_global(intx, InlineUnsafeOps, true); 174define_pd_global(intx, InitialCodeCacheSize, 160*K); 175define_pd_global(intx, ReservedCodeCacheSize, 32*M); 176define_pd_global(intx, CodeCacheExpansionSize, 32*K); 177define_pd_global(intx, CodeCacheMinBlockLength, 1); 178define_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); 179define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); 180define_pd_global(bool, NeverActAsServerClassMachine, true); 181define_pd_global(uint64_t,MaxRAM, 1ULL*G); 182#define CI_COMPILER_COUNT 0 183#else 184 185#ifdef COMPILER2 186#define CI_COMPILER_COUNT 2 187#else 188#define CI_COMPILER_COUNT 1 189#endif // COMPILER2 190 191#endif // no compilers 192 193// string type aliases used only in this file 194typedef const char* ccstr; 195typedef const char* ccstrlist; // represents string arguments which accumulate 196 197enum FlagValueOrigin { 198 DEFAULT = 0, 199 COMMAND_LINE = 1, 200 ENVIRON_VAR = 2, 201 CONFIG_FILE = 3, 202 MANAGEMENT = 4, 203 ERGONOMIC = 5, 204 ATTACH_ON_DEMAND = 6, 205 INTERNAL = 99 206}; 207 208struct Flag { 209 const char *type; 210 const char *name; 211 void* addr; 212 213 NOT_PRODUCT(const char *doc;) 214 215 const char *kind; 216 FlagValueOrigin origin; 217 218 // points to all Flags static array 219 static Flag *flags; 220 221 // number of flags 222 static size_t numFlags; 223 224 static Flag* find_flag(char* name, size_t length, bool allow_locked = false); 225 226 bool is_bool() const { return strcmp(type, "bool") == 0; } 227 bool get_bool() const { return *((bool*) addr); } 228 void set_bool(bool value) { *((bool*) addr) = value; } 229 230 bool is_intx() const { return strcmp(type, "intx") == 0; } 231 intx get_intx() const { return *((intx*) addr); } 232 void set_intx(intx value) { *((intx*) addr) = value; } 233 234 bool is_uintx() const { return strcmp(type, "uintx") == 0; } 235 uintx get_uintx() const { return *((uintx*) addr); } 236 void set_uintx(uintx value) { *((uintx*) addr) = value; } 237 238 bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 239 uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 240 void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 241 242 bool is_double() const { return strcmp(type, "double") == 0; } 243 double get_double() const { return *((double*) addr); } 244 void set_double(double value) { *((double*) addr) = value; } 245 246 bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 247 bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 248 ccstr get_ccstr() const { return *((ccstr*) addr); } 249 void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 250 251 bool is_unlocker() const; 252 bool is_unlocked() const; 253 bool is_writeable() const; 254 bool is_external() const; 255 256 bool is_unlocker_ext() const; 257 bool is_unlocked_ext() const; 258 bool is_writeable_ext() const; 259 bool is_external_ext() const; 260 261 void get_locked_message(char*, int) const; 262 void get_locked_message_ext(char*, int) const; 263 264 void print_on(outputStream* st, bool withComments = false ); 265 void print_as_flag(outputStream* st); 266}; 267 268// debug flags control various aspects of the VM and are global accessible 269 270// use FlagSetting to temporarily change some debug flag 271// e.g. FlagSetting fs(DebugThisAndThat, true); 272// restored to previous value upon leaving scope 273class FlagSetting { 274 bool val; 275 bool* flag; 276 public: 277 FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 278 ~FlagSetting() { *flag = val; } 279}; 280 281 282class CounterSetting { 283 intx* counter; 284 public: 285 CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 286 ~CounterSetting() { (*counter)--; } 287}; 288 289 290class IntFlagSetting { 291 intx val; 292 intx* flag; 293 public: 294 IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 295 ~IntFlagSetting() { *flag = val; } 296}; 297 298 299class DoubleFlagSetting { 300 double val; 301 double* flag; 302 public: 303 DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 304 ~DoubleFlagSetting() { *flag = val; } 305}; 306 307 308class CommandLineFlags { 309 public: 310 static bool boolAt(char* name, size_t len, bool* value); 311 static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 312 static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 313 static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 314 315 static bool intxAt(char* name, size_t len, intx* value); 316 static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 317 static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 318 static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 319 320 static bool uintxAt(char* name, size_t len, uintx* value); 321 static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 322 static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 323 static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 324 325 static bool uint64_tAt(char* name, size_t len, uint64_t* value); 326 static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 327 static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 328 static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 329 330 static bool doubleAt(char* name, size_t len, double* value); 331 static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 332 static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 333 static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 334 335 static bool ccstrAt(char* name, size_t len, ccstr* value); 336 static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 337 static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 338 static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 339 340 // Returns false if name is not a command line flag. 341 static bool wasSetOnCmdline(const char* name, bool* value); 342 static void printSetFlags(outputStream* out); 343 344 static void printFlags(outputStream* out, bool withComments); 345 346 static void verify() PRODUCT_RETURN; 347}; 348 349// use this for flags that are true by default in the debug version but 350// false in the optimized version, and vice versa 351#ifdef ASSERT 352#define trueInDebug true 353#define falseInDebug false 354#else 355#define trueInDebug false 356#define falseInDebug true 357#endif 358 359// use this for flags that are true per default in the product build 360// but false in development builds, and vice versa 361#ifdef PRODUCT 362#define trueInProduct true 363#define falseInProduct false 364#else 365#define trueInProduct false 366#define falseInProduct true 367#endif 368 369#ifdef JAVASE_EMBEDDED 370#define falseInEmbedded false 371#else 372#define falseInEmbedded true 373#endif 374 375// develop flags are settable / visible only during development and are constant in the PRODUCT version 376// product flags are always settable / visible 377// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 378 379// A flag must be declared with one of the following types: 380// bool, intx, uintx, ccstr. 381// The type "ccstr" is an alias for "const char*" and is used 382// only in this file, because the macrology requires single-token type names. 383 384// Note: Diagnostic options not meant for VM tuning or for product modes. 385// They are to be used for VM quality assurance or field diagnosis 386// of VM bugs. They are hidden so that users will not be encouraged to 387// try them as if they were VM ordinary execution options. However, they 388// are available in the product version of the VM. Under instruction 389// from support engineers, VM customers can turn them on to collect 390// diagnostic information about VM problems. To use a VM diagnostic 391// option, you must first specify +UnlockDiagnosticVMOptions. 392// (This master switch also affects the behavior of -Xprintflags.) 393// 394// experimental flags are in support of features that are not 395// part of the officially supported product, but are available 396// for experimenting with. They could, for example, be performance 397// features that may not have undergone full or rigorous QA, but which may 398// help performance in some cases and released for experimentation 399// by the community of users and developers. This flag also allows one to 400// be able to build a fully supported product that nonetheless also 401// ships with some unsupported, lightly tested, experimental features. 402// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 403// UnlockExperimentalVMOptions flag, which allows the control and 404// modification of the experimental flags. 405// 406// Nota bene: neither diagnostic nor experimental options should be used casually, 407// and they are not supported on production loads, except under explicit 408// direction from support engineers. 409// 410// manageable flags are writeable external product flags. 411// They are dynamically writeable through the JDK management interface 412// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 413// These flags are external exported interface (see CCC). The list of 414// manageable flags can be queried programmatically through the management 415// interface. 416// 417// A flag can be made as "manageable" only if 418// - the flag is defined in a CCC as an external exported interface. 419// - the VM implementation supports dynamic setting of the flag. 420// This implies that the VM must *always* query the flag variable 421// and not reuse state related to the flag state at any given time. 422// - you want the flag to be queried programmatically by the customers. 423// 424// product_rw flags are writeable internal product flags. 425// They are like "manageable" flags but for internal/private use. 426// The list of product_rw flags are internal/private flags which 427// may be changed/removed in a future release. It can be set 428// through the management interface to get/set value 429// when the name of flag is supplied. 430// 431// A flag can be made as "product_rw" only if 432// - the VM implementation supports dynamic setting of the flag. 433// This implies that the VM must *always* query the flag variable 434// and not reuse state related to the flag state at any given time. 435// 436// Note that when there is a need to support develop flags to be writeable, 437// it can be done in the same way as product_rw. 438 439#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 440 \ 441 lp64_product(bool, UseCompressedOops, false, \ 442 "Use 32-bit object references in 64-bit VM. " \ 443 "lp64_product means flag is always constant in 32 bit VM") \ 444 \ 445 notproduct(bool, CheckCompressedOops, true, \ 446 "generate checks in encoding/decoding code in debug VM") \ 447 \ 448 product_pd(uintx, HeapBaseMinAddress, \ 449 "OS specific low limit for heap base address") \ 450 \ 451 diagnostic(bool, PrintCompressedOopsMode, false, \ 452 "Print compressed oops base address and encoding mode") \ 453 \ 454 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 455 "Default object alignment in bytes, 8 is minimum") \ 456 \ 457 /* UseMembar is theoretically a temp flag used for memory barrier \ 458 * removal testing. It was supposed to be removed before FCS but has \ 459 * been re-added (see 6401008) */ \ 460 product_pd(bool, UseMembar, \ 461 "(Unstable) Issues membars on thread state transitions") \ 462 \ 463 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 464 * that don't support it. This will be replaced by processor detection \ 465 * logic. \ 466 */ \ 467 product(bool, UsePPCLWSYNC, true, \ 468 "Use lwsync instruction if true, else use slower sync") \ 469 \ 470 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 471 "Whether to clean the chunk pool asynchronously") \ 472 \ 473 /* Temporary: See 6948537 */ \ 474 experimental(bool, UseMemSetInBOT, true, \ 475 "(Unstable) uses memset in BOT updates in GC code") \ 476 \ 477 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 478 "Enable normal processing of flags relating to field diagnostics")\ 479 \ 480 experimental(bool, UnlockExperimentalVMOptions, false, \ 481 "Enable normal processing of flags relating to experimental features")\ 482 \ 483 product(bool, JavaMonitorsInStackTrace, true, \ 484 "Print info. about Java monitor locks when the stacks are dumped")\ 485 \ 486 product_pd(bool, UseLargePages, \ 487 "Use large page memory") \ 488 \ 489 product_pd(bool, UseLargePagesIndividualAllocation, \ 490 "Allocate large pages individually for better affinity") \ 491 \ 492 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 493 "Fail large pages individual allocation") \ 494 \ 495 develop(bool, TracePageSizes, false, \ 496 "Trace page size selection and usage.") \ 497 \ 498 product(bool, UseNUMA, false, \ 499 "Use NUMA if available") \ 500 \ 501 product(bool, UseNUMAInterleaving, false, \ 502 "Interleave memory across NUMA nodes if available") \ 503 \ 504 product(uintx, NUMAInterleaveGranularity, 2*M, \ 505 "Granularity to use for NUMA interleaving on Windows OS") \ 506 \ 507 product(bool, ForceNUMA, false, \ 508 "Force NUMA optimizations on single-node/UMA systems") \ 509 \ 510 product(intx, NUMAChunkResizeWeight, 20, \ 511 "Percentage (0-100) used to weight the current sample when " \ 512 "computing exponentially decaying average for " \ 513 "AdaptiveNUMAChunkSizing") \ 514 \ 515 product(intx, NUMASpaceResizeRate, 1*G, \ 516 "Do not reallocate more that this amount per collection") \ 517 \ 518 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 519 "Enable adaptive chunk sizing for NUMA") \ 520 \ 521 product(bool, NUMAStats, false, \ 522 "Print NUMA stats in detailed heap information") \ 523 \ 524 product(intx, NUMAPageScanRate, 256, \ 525 "Maximum number of pages to include in the page scan procedure") \ 526 \ 527 product_pd(bool, NeedsDeoptSuspend, \ 528 "True for register window machines (sparc/ia64)") \ 529 \ 530 product(intx, UseSSE, 99, \ 531 "Highest supported SSE instructions set on x86/x64") \ 532 \ 533 product(intx, UseAVX, 99, \ 534 "Highest supported AVX instructions set on x86/x64") \ 535 \ 536 product(intx, UseVIS, 99, \ 537 "Highest supported VIS instructions set on Sparc") \ 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, BailoutToInterpreterForThrows, false, \ 576 "Compiled methods which throws/catches exceptions will be " \ 577 "deopt and intp.") \ 578 \ 579 develop(bool, NoYieldsInMicrolock, false, \ 580 "Disable yields in microlock") \ 581 \ 582 develop(bool, TraceOopMapGeneration, false, \ 583 "Shows oopmap generation") \ 584 \ 585 product(bool, MethodFlushing, true, \ 586 "Reclamation of zombie and not-entrant methods") \ 587 \ 588 develop(bool, VerifyStack, false, \ 589 "Verify stack of each thread when it is entering a runtime call") \ 590 \ 591 diagnostic(bool, ForceUnreachable, false, \ 592 "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 593 \ 594 notproduct(bool, StressDerivedPointers, false, \ 595 "Force scavenge when a derived pointers is detected on stack " \ 596 "after rtm call") \ 597 \ 598 develop(bool, TraceDerivedPointers, false, \ 599 "Trace traversal of derived pointers on stack") \ 600 \ 601 notproduct(bool, TraceCodeBlobStacks, false, \ 602 "Trace stack-walk of codeblobs") \ 603 \ 604 product(bool, PrintJNIResolving, false, \ 605 "Used to implement -v:jni") \ 606 \ 607 notproduct(bool, PrintRewrites, false, \ 608 "Print methods that are being rewritten") \ 609 \ 610 product(bool, UseInlineCaches, true, \ 611 "Use Inline Caches for virtual calls ") \ 612 \ 613 develop(bool, InlineArrayCopy, true, \ 614 "inline arraycopy native that is known to be part of " \ 615 "base library DLL") \ 616 \ 617 develop(bool, InlineObjectHash, true, \ 618 "inline Object::hashCode() native that is known to be part " \ 619 "of base library DLL") \ 620 \ 621 develop(bool, InlineObjectCopy, true, \ 622 "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 623 \ 624 develop(bool, InlineNatives, true, \ 625 "inline natives that are known to be part of base library DLL") \ 626 \ 627 develop(bool, InlineMathNatives, true, \ 628 "inline SinD, CosD, etc.") \ 629 \ 630 develop(bool, InlineClassNatives, true, \ 631 "inline Class.isInstance, etc") \ 632 \ 633 develop(bool, InlineThreadNatives, true, \ 634 "inline Thread.currentThread, etc") \ 635 \ 636 develop(bool, InlineReflectionGetCallerClass, true, \ 637 "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 638 "of base library DLL") \ 639 \ 640 develop(bool, InlineUnsafeOps, true, \ 641 "inline memory ops (native methods) from sun.misc.Unsafe") \ 642 \ 643 develop(bool, ConvertCmpD2CmpF, true, \ 644 "Convert cmpD to cmpF when one input is constant in float range") \ 645 \ 646 develop(bool, ConvertFloat2IntClipping, true, \ 647 "Convert float2int clipping idiom to integer clipping") \ 648 \ 649 develop(bool, SpecialStringCompareTo, true, \ 650 "special version of string compareTo") \ 651 \ 652 develop(bool, SpecialStringIndexOf, true, \ 653 "special version of string indexOf") \ 654 \ 655 develop(bool, SpecialStringEquals, true, \ 656 "special version of string equals") \ 657 \ 658 develop(bool, SpecialArraysEquals, true, \ 659 "special version of Arrays.equals(char[],char[])") \ 660 \ 661 product(bool, CriticalJNINatives, true, \ 662 "check for critical JNI entry points") \ 663 \ 664 notproduct(bool, StressCriticalJNINatives, false, \ 665 "Exercise register saving code in critical natives") \ 666 \ 667 product(bool, UseSSE42Intrinsics, false, \ 668 "SSE4.2 versions of intrinsics") \ 669 \ 670 product(bool, UseCondCardMark, false, \ 671 "Check for already marked card before updating card table") \ 672 \ 673 develop(bool, TraceCallFixup, false, \ 674 "traces all call fixups") \ 675 \ 676 develop(bool, DeoptimizeALot, false, \ 677 "deoptimize at every exit from the runtime system") \ 678 \ 679 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 680 "a comma separated list of bcis to deoptimize at") \ 681 \ 682 product(bool, DeoptimizeRandom, false, \ 683 "deoptimize random frames on random exit from the runtime system")\ 684 \ 685 notproduct(bool, ZombieALot, false, \ 686 "creates zombies (non-entrant) at exit from the runt. system") \ 687 \ 688 product(bool, UnlinkSymbolsALot, false, \ 689 "unlink unreferenced symbols from the symbol table at safepoints")\ 690 \ 691 notproduct(bool, WalkStackALot, false, \ 692 "trace stack (no print) at every exit from the runtime system") \ 693 \ 694 product(bool, Debugging, false, \ 695 "set when executing debug methods in debug.ccp " \ 696 "(to prevent triggering assertions)") \ 697 \ 698 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 699 "Enable strict checks that safepoints cannot happen for threads " \ 700 "that used No_Safepoint_Verifier") \ 701 \ 702 notproduct(bool, VerifyLastFrame, false, \ 703 "Verify oops on last frame on entry to VM") \ 704 \ 705 develop(bool, TraceHandleAllocation, false, \ 706 "Prints out warnings when suspicious many handles are allocated") \ 707 \ 708 product(bool, UseCompilerSafepoints, true, \ 709 "Stop at safepoints in compiled code") \ 710 \ 711 product(bool, UseSplitVerifier, true, \ 712 "use split verifier with StackMapTable attributes") \ 713 \ 714 product(bool, FailOverToOldVerifier, true, \ 715 "fail over to old verifier when split verifier fails") \ 716 \ 717 develop(bool, ShowSafepointMsgs, false, \ 718 "Show msg. about safepoint synch.") \ 719 \ 720 product(bool, SafepointTimeout, false, \ 721 "Time out and warn or fail after SafepointTimeoutDelay " \ 722 "milliseconds if failed to reach safepoint") \ 723 \ 724 develop(bool, DieOnSafepointTimeout, false, \ 725 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 726 \ 727 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 728 /* typically, at most a few retries are needed */ \ 729 product(intx, SuspendRetryCount, 50, \ 730 "Maximum retry count for an external suspend request") \ 731 \ 732 product(intx, SuspendRetryDelay, 5, \ 733 "Milliseconds to delay per retry (* current_retry_count)") \ 734 \ 735 product(bool, AssertOnSuspendWaitFailure, false, \ 736 "Assert/Guarantee on external suspend wait failure") \ 737 \ 738 product(bool, TraceSuspendWaitFailures, false, \ 739 "Trace external suspend wait failures") \ 740 \ 741 product(bool, MaxFDLimit, true, \ 742 "Bump the number of file descriptors to max in solaris.") \ 743 \ 744 diagnostic(bool, LogEvents, true, \ 745 "Enable the various ring buffer event logs") \ 746 \ 747 diagnostic(intx, LogEventsBufferEntries, 10, \ 748 "Enable the various ring buffer event logs") \ 749 \ 750 product(bool, BytecodeVerificationRemote, true, \ 751 "Enables the Java bytecode verifier for remote classes") \ 752 \ 753 product(bool, BytecodeVerificationLocal, false, \ 754 "Enables the Java bytecode verifier for local classes") \ 755 \ 756 develop(bool, ForceFloatExceptions, trueInDebug, \ 757 "Force exceptions on FP stack under/overflow") \ 758 \ 759 develop(bool, SoftMatchFailure, trueInProduct, \ 760 "If the DFA fails to match a node, print a message and bail out") \ 761 \ 762 develop(bool, VerifyStackAtCalls, false, \ 763 "Verify that the stack pointer is unchanged after calls") \ 764 \ 765 develop(bool, TraceJavaAssertions, false, \ 766 "Trace java language assertions") \ 767 \ 768 notproduct(bool, CheckAssertionStatusDirectives, false, \ 769 "temporary - see javaClasses.cpp") \ 770 \ 771 notproduct(bool, PrintMallocFree, false, \ 772 "Trace calls to C heap malloc/free allocation") \ 773 \ 774 product(bool, PrintOopAddress, false, \ 775 "Always print the location of the oop") \ 776 \ 777 notproduct(bool, VerifyCodeCacheOften, false, \ 778 "Verify compiled-code cache often") \ 779 \ 780 develop(bool, ZapDeadCompiledLocals, false, \ 781 "Zap dead locals in compiler frames") \ 782 \ 783 notproduct(bool, ZapDeadLocalsOld, false, \ 784 "Zap dead locals (old version, zaps all frames when " \ 785 "entering the VM") \ 786 \ 787 notproduct(bool, CheckOopishValues, false, \ 788 "Warn if value contains oop ( requires ZapDeadLocals)") \ 789 \ 790 develop(bool, UseMallocOnly, false, \ 791 "use only malloc/free for allocation (no resource area/arena)") \ 792 \ 793 develop(bool, PrintMalloc, false, \ 794 "print all malloc/free calls") \ 795 \ 796 develop(bool, PrintMallocStatistics, false, \ 797 "print malloc/free statistics") \ 798 \ 799 develop(bool, ZapResourceArea, trueInDebug, \ 800 "Zap freed resource/arena space with 0xABABABAB") \ 801 \ 802 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 803 "Zap freed VM handle space with 0xBCBCBCBC") \ 804 \ 805 develop(bool, ZapJNIHandleArea, trueInDebug, \ 806 "Zap freed JNI handle space with 0xFEFEFEFE") \ 807 \ 808 notproduct(bool, ZapStackSegments, trueInDebug, \ 809 "Zap allocated/freed Stack segments with 0xFADFADED") \ 810 \ 811 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 812 "Zap unused heap space with 0xBAADBABE") \ 813 \ 814 develop(bool, TraceZapUnusedHeapArea, false, \ 815 "Trace zapping of unused heap space") \ 816 \ 817 develop(bool, CheckZapUnusedHeapArea, false, \ 818 "Check zapping of unused heap space") \ 819 \ 820 develop(bool, ZapFillerObjects, trueInDebug, \ 821 "Zap filler objects with 0xDEAFBABE") \ 822 \ 823 develop(bool, PrintVMMessages, true, \ 824 "Print vm messages on console") \ 825 \ 826 product(bool, PrintGCApplicationConcurrentTime, false, \ 827 "Print the time the application has been running") \ 828 \ 829 product(bool, PrintGCApplicationStoppedTime, false, \ 830 "Print the time the application has been stopped") \ 831 \ 832 notproduct(uintx, ErrorHandlerTest, 0, \ 833 "If > 0, provokes an error after VM initialization; the value" \ 834 "determines which error to provoke. See test_error_handler()" \ 835 "in debug.cpp.") \ 836 \ 837 develop(bool, Verbose, false, \ 838 "Prints additional debugging information from other modes") \ 839 \ 840 develop(bool, PrintMiscellaneous, false, \ 841 "Prints uncategorized debugging information (requires +Verbose)") \ 842 \ 843 develop(bool, WizardMode, false, \ 844 "Prints much more debugging information") \ 845 \ 846 product(bool, ShowMessageBoxOnError, false, \ 847 "Keep process alive on VM fatal error") \ 848 \ 849 product(bool, CreateMinidumpOnCrash, false, \ 850 "Create minidump on VM fatal error") \ 851 \ 852 product_pd(bool, UseOSErrorReporting, \ 853 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 854 \ 855 product(bool, SuppressFatalErrorMessage, false, \ 856 "Do NO Fatal Error report [Avoid deadlock]") \ 857 \ 858 product(ccstrlist, OnError, "", \ 859 "Run user-defined commands on fatal error; see VMError.cpp " \ 860 "for examples") \ 861 \ 862 product(ccstrlist, OnOutOfMemoryError, "", \ 863 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 864 \ 865 manageable(bool, HeapDumpBeforeFullGC, false, \ 866 "Dump heap to file before any major stop-world GC") \ 867 \ 868 manageable(bool, HeapDumpAfterFullGC, false, \ 869 "Dump heap to file after any major stop-world GC") \ 870 \ 871 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 872 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 873 \ 874 manageable(ccstr, HeapDumpPath, NULL, \ 875 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 876 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 877 "in the working directory)") \ 878 \ 879 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 880 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 881 "when the heap usage is larger than this") \ 882 \ 883 develop(uintx, HeapDumpSegmentSize, 1*G, \ 884 "Approximate segment size when generating a segmented heap dump") \ 885 \ 886 develop(bool, BreakAtWarning, false, \ 887 "Execute breakpoint upon encountering VM warning") \ 888 \ 889 product_pd(bool, UseVectoredExceptions, \ 890 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 891 \ 892 develop(bool, TraceVMOperation, false, \ 893 "Trace vm operations") \ 894 \ 895 develop(bool, UseFakeTimers, false, \ 896 "Tells whether the VM should use system time or a fake timer") \ 897 \ 898 product(ccstr, NativeMemoryTracking, "off", \ 899 "Native memory tracking options") \ 900 \ 901 diagnostic(bool, LogCompilation, false, \ 902 "Log compilation activity in detail to hotspot.log or LogFile") \ 903 \ 904 product(bool, PrintCompilation, false, \ 905 "Print compilations") \ 906 \ 907 diagnostic(bool, TraceNMethodInstalls, false, \ 908 "Trace nmethod intallation") \ 909 \ 910 diagnostic(intx, ScavengeRootsInCode, 2, \ 911 "0: do not allow scavengable oops in the code cache; " \ 912 "1: allow scavenging from the code cache; " \ 913 "2: emit as many constants as the compiler can see") \ 914 \ 915 diagnostic(bool, TraceOSRBreakpoint, false, \ 916 "Trace OSR Breakpoint ") \ 917 \ 918 diagnostic(bool, TraceCompileTriggered, false, \ 919 "Trace compile triggered") \ 920 \ 921 diagnostic(bool, TraceTriggers, false, \ 922 "Trace triggers") \ 923 \ 924 product(bool, AlwaysRestoreFPU, false, \ 925 "Restore the FPU control word after every JNI call (expensive)") \ 926 \ 927 diagnostic(bool, PrintCompilation2, false, \ 928 "Print additional statistics per compilation") \ 929 \ 930 diagnostic(bool, PrintAdapterHandlers, false, \ 931 "Print code generated for i2c/c2i adapters") \ 932 \ 933 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 934 "Verify that i2c/c2i adapters are called properly") \ 935 \ 936 develop(bool, VerifyAdapterSharing, false, \ 937 "Verify that the code for shared adapters is the equivalent") \ 938 \ 939 diagnostic(bool, PrintAssembly, false, \ 940 "Print assembly code (using external disassembler.so)") \ 941 \ 942 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 943 "Options string passed to disassembler.so") \ 944 \ 945 diagnostic(bool, PrintNMethods, false, \ 946 "Print assembly code for nmethods when generated") \ 947 \ 948 diagnostic(bool, PrintNativeNMethods, false, \ 949 "Print assembly code for native nmethods when generated") \ 950 \ 951 develop(bool, PrintDebugInfo, false, \ 952 "Print debug information for all nmethods when generated") \ 953 \ 954 develop(bool, PrintRelocations, false, \ 955 "Print relocation information for all nmethods when generated") \ 956 \ 957 develop(bool, PrintDependencies, false, \ 958 "Print dependency information for all nmethods when generated") \ 959 \ 960 develop(bool, PrintExceptionHandlers, false, \ 961 "Print exception handler tables for all nmethods when generated") \ 962 \ 963 develop(bool, InterceptOSException, false, \ 964 "Starts debugger when an implicit OS (e.g., NULL) " \ 965 "exception happens") \ 966 \ 967 notproduct(bool, PrintCodeCache, false, \ 968 "Print the compiled_code cache when exiting") \ 969 \ 970 develop(bool, PrintCodeCache2, false, \ 971 "Print detailed info on the compiled_code cache when exiting") \ 972 \ 973 diagnostic(bool, PrintStubCode, false, \ 974 "Print generated stub code") \ 975 \ 976 product(bool, StackTraceInThrowable, true, \ 977 "Collect backtrace in throwable when exception happens") \ 978 \ 979 product(bool, OmitStackTraceInFastThrow, true, \ 980 "Omit backtraces for some 'hot' exceptions in optimized code") \ 981 \ 982 product(bool, ProfilerPrintByteCodeStatistics, false, \ 983 "Prints byte code statictics when dumping profiler output") \ 984 \ 985 product(bool, ProfilerRecordPC, false, \ 986 "Collects tick for each 16 byte interval of compiled code") \ 987 \ 988 product(bool, ProfileVM, false, \ 989 "Profiles ticks that fall within VM (either in the VM Thread " \ 990 "or VM code called through stubs)") \ 991 \ 992 product(bool, ProfileIntervals, false, \ 993 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 994 \ 995 notproduct(bool, ProfilerCheckIntervals, false, \ 996 "Collect and print info on spacing of profiler ticks") \ 997 \ 998 develop(bool, PrintJVMWarnings, false, \ 999 "Prints warnings for unimplemented JVM functions") \ 1000 \ 1001 product(bool, PrintWarnings, true, \ 1002 "Prints JVM warnings to output stream") \ 1003 \ 1004 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1005 "Prints warnings for stalled SpinLocks") \ 1006 \ 1007 develop(bool, InitializeJavaLangSystem, true, \ 1008 "Initialize java.lang.System - turn off for individual " \ 1009 "method debugging") \ 1010 \ 1011 develop(bool, InitializeJavaLangString, true, \ 1012 "Initialize java.lang.String - turn off for individual " \ 1013 "method debugging") \ 1014 \ 1015 develop(bool, InitializeJavaLangExceptionsErrors, true, \ 1016 "Initialize various error and exception classes - turn off for " \ 1017 "individual method debugging") \ 1018 \ 1019 product(bool, RegisterFinalizersAtInit, true, \ 1020 "Register finalizable objects at end of Object.<init> or " \ 1021 "after allocation") \ 1022 \ 1023 develop(bool, RegisterReferences, true, \ 1024 "Tells whether the VM should register soft/weak/final/phantom " \ 1025 "references") \ 1026 \ 1027 develop(bool, IgnoreRewrites, false, \ 1028 "Supress rewrites of bytecodes in the oopmap generator. " \ 1029 "This is unsafe!") \ 1030 \ 1031 develop(bool, PrintCodeCacheExtension, false, \ 1032 "Print extension of code cache") \ 1033 \ 1034 develop(bool, UsePrivilegedStack, true, \ 1035 "Enable the security JVM functions") \ 1036 \ 1037 develop(bool, IEEEPrecision, true, \ 1038 "Enables IEEE precision (for INTEL only)") \ 1039 \ 1040 develop(bool, ProtectionDomainVerification, true, \ 1041 "Verifies protection domain before resolution in system " \ 1042 "dictionary") \ 1043 \ 1044 product(bool, ClassUnloading, true, \ 1045 "Do unloading of classes") \ 1046 \ 1047 diagnostic(bool, LinkWellKnownClasses, false, \ 1048 "Resolve a well known class as soon as its name is seen") \ 1049 \ 1050 develop(bool, DisableStartThread, false, \ 1051 "Disable starting of additional Java threads " \ 1052 "(for debugging only)") \ 1053 \ 1054 develop(bool, MemProfiling, false, \ 1055 "Write memory usage profiling to log file") \ 1056 \ 1057 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1058 "Prints the system dictionary at exit") \ 1059 \ 1060 experimental(intx, PredictedLoadedClassCount, 0, \ 1061 "Experimental: Tune loaded class cache starting size.") \ 1062 \ 1063 diagnostic(bool, UnsyncloadClass, false, \ 1064 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1065 "class loader must call VM synchronized for findClass " \ 1066 "and defineClass.") \ 1067 \ 1068 product(bool, AlwaysLockClassLoader, false, \ 1069 "Require the VM to acquire the class loader lock before calling " \ 1070 "loadClass() even for class loaders registering " \ 1071 "as parallel capable") \ 1072 \ 1073 product(bool, AllowParallelDefineClass, false, \ 1074 "Allow parallel defineClass requests for class loaders " \ 1075 "registering as parallel capable") \ 1076 \ 1077 product(bool, MustCallLoadClassInternal, false, \ 1078 "Call loadClassInternal() rather than loadClass()") \ 1079 \ 1080 product_pd(bool, DontYieldALot, \ 1081 "Throw away obvious excess yield calls (for SOLARIS only)") \ 1082 \ 1083 product_pd(bool, ConvertSleepToYield, \ 1084 "Converts sleep(0) to thread yield " \ 1085 "(may be off for SOLARIS to improve GUI)") \ 1086 \ 1087 product(bool, ConvertYieldToSleep, false, \ 1088 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 1089 "behavior (SOLARIS only)") \ 1090 \ 1091 product(bool, UseBoundThreads, true, \ 1092 "Bind user level threads to kernel threads (for SOLARIS only)") \ 1093 \ 1094 develop(bool, UseDetachedThreads, true, \ 1095 "Use detached threads that are recycled upon termination " \ 1096 "(for SOLARIS only)") \ 1097 \ 1098 product(bool, UseLWPSynchronization, true, \ 1099 "Use LWP-based instead of libthread-based synchronization " \ 1100 "(SPARC only)") \ 1101 \ 1102 product(ccstr, SyncKnobs, NULL, \ 1103 "(Unstable) Various monitor synchronization tunables") \ 1104 \ 1105 product(intx, EmitSync, 0, \ 1106 "(Unsafe,Unstable) " \ 1107 " Controls emission of inline sync fast-path code") \ 1108 \ 1109 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 1110 \ 1111 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1112 \ 1113 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1114 \ 1115 product(intx, Atomics, 0, \ 1116 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 1117 \ 1118 product(intx, FenceInstruction, 0, \ 1119 "(Unsafe,Unstable) Experimental") \ 1120 \ 1121 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 1122 \ 1123 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 1124 \ 1125 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 1126 \ 1127 product(intx, hashCode, 0, \ 1128 "(Unstable) select hashCode generation algorithm" ) \ 1129 \ 1130 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1131 "(Unstable, Linux-specific)" \ 1132 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 1133 \ 1134 product(bool, FilterSpuriousWakeups, true, \ 1135 "Prevent spurious or premature wakeups from object.wait " \ 1136 "(Solaris only)") \ 1137 \ 1138 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1139 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1140 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1141 \ 1142 develop(bool, UsePthreads, false, \ 1143 "Use pthread-based instead of libthread-based synchronization " \ 1144 "(SPARC only)") \ 1145 \ 1146 product(bool, AdjustConcurrency, false, \ 1147 "call thr_setconcurrency at thread create time to avoid " \ 1148 "LWP starvation on MP systems (For Solaris Only)") \ 1149 \ 1150 develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 1151 "Should the system attempt to update the compiler file when " \ 1152 "an error occurs?") \ 1153 \ 1154 product(bool, ReduceSignalUsage, false, \ 1155 "Reduce the use of OS signals in Java and/or the VM") \ 1156 \ 1157 notproduct(bool, ValidateMarkSweep, false, \ 1158 "Do extra validation during MarkSweep collection") \ 1159 \ 1160 notproduct(bool, RecordMarkSweepCompaction, false, \ 1161 "Enable GC-to-GC recording and querying of compaction during " \ 1162 "MarkSweep") \ 1163 \ 1164 develop_pd(bool, ShareVtableStubs, \ 1165 "Share vtable stubs (smaller code but worse branch prediction") \ 1166 \ 1167 develop(bool, LoadLineNumberTables, true, \ 1168 "Tells whether the class file parser loads line number tables") \ 1169 \ 1170 develop(bool, LoadLocalVariableTables, true, \ 1171 "Tells whether the class file parser loads local variable tables")\ 1172 \ 1173 develop(bool, LoadLocalVariableTypeTables, true, \ 1174 "Tells whether the class file parser loads local variable type tables")\ 1175 \ 1176 product(bool, AllowUserSignalHandlers, false, \ 1177 "Do not complain if the application installs signal handlers " \ 1178 "(Solaris & Linux only)") \ 1179 \ 1180 product(bool, UseSignalChaining, true, \ 1181 "Use signal-chaining to invoke signal handlers installed " \ 1182 "by the application (Solaris & Linux only)") \ 1183 \ 1184 product(bool, UseAltSigs, false, \ 1185 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1186 "internal signals (Solaris only)") \ 1187 \ 1188 product(bool, UseSpinning, false, \ 1189 "Use spinning in monitor inflation and before entry") \ 1190 \ 1191 product(bool, PreSpinYield, false, \ 1192 "Yield before inner spinning loop") \ 1193 \ 1194 product(bool, PostSpinYield, true, \ 1195 "Yield after inner spinning loop") \ 1196 \ 1197 product(bool, AllowJNIEnvProxy, false, \ 1198 "Allow JNIEnv proxies for jdbx") \ 1199 \ 1200 product(bool, JNIDetachReleasesMonitors, true, \ 1201 "JNI DetachCurrentThread releases monitors owned by thread") \ 1202 \ 1203 product(bool, RestoreMXCSROnJNICalls, false, \ 1204 "Restore MXCSR when returning from JNI calls") \ 1205 \ 1206 product(bool, CheckJNICalls, false, \ 1207 "Verify all arguments to JNI calls") \ 1208 \ 1209 product(bool, UseFastJNIAccessors, true, \ 1210 "Use optimized versions of Get<Primitive>Field") \ 1211 \ 1212 product(bool, EagerXrunInit, false, \ 1213 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1214 " but not all -Xrun libraries may support the state of the VM at this time") \ 1215 \ 1216 product(bool, PreserveAllAnnotations, false, \ 1217 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1218 \ 1219 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1220 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1221 \ 1222 product(bool, LazyBootClassLoader, true, \ 1223 "Enable/disable lazy opening of boot class path entries") \ 1224 \ 1225 diagnostic(bool, UseIncDec, true, \ 1226 "Use INC, DEC instructions on x86") \ 1227 \ 1228 product(bool, UseNewLongLShift, false, \ 1229 "Use optimized bitwise shift left") \ 1230 \ 1231 product(bool, UseStoreImmI16, true, \ 1232 "Use store immediate 16-bits value instruction on x86") \ 1233 \ 1234 product(bool, UseAddressNop, false, \ 1235 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 1236 \ 1237 product(bool, UseXmmLoadAndClearUpper, true, \ 1238 "Load low part of XMM register and clear upper part") \ 1239 \ 1240 product(bool, UseXmmRegToRegMoveAll, false, \ 1241 "Copy all XMM register bits when moving value between registers") \ 1242 \ 1243 product(bool, UseXmmI2D, false, \ 1244 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 1245 \ 1246 product(bool, UseXmmI2F, false, \ 1247 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 1248 \ 1249 product(bool, UseXMMForArrayCopy, false, \ 1250 "Use SSE2 MOVQ instruction for Arraycopy") \ 1251 \ 1252 product(bool, UseUnalignedLoadStores, false, \ 1253 "Use SSE2 MOVDQU instruction for Arraycopy") \ 1254 \ 1255 product(bool, UseCBCond, false, \ 1256 "Use compare and branch instruction on SPARC") \ 1257 \ 1258 product(intx, FieldsAllocationStyle, 1, \ 1259 "0 - type based with oops first, 1 - with oops last, " \ 1260 "2 - oops in super and sub classes are together") \ 1261 \ 1262 product(bool, CompactFields, true, \ 1263 "Allocate nonstatic fields in gaps between previous fields") \ 1264 \ 1265 notproduct(bool, PrintCompactFieldsSavings, false, \ 1266 "Print how many words were saved with CompactFields") \ 1267 \ 1268 product(bool, UseBiasedLocking, true, \ 1269 "Enable biased locking in JVM") \ 1270 \ 1271 product(intx, BiasedLockingStartupDelay, 4000, \ 1272 "Number of milliseconds to wait before enabling biased locking") \ 1273 \ 1274 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1275 "Print statistics of biased locking in JVM") \ 1276 \ 1277 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1278 "Threshold of number of revocations per type to try to " \ 1279 "rebias all objects in the heap of that type") \ 1280 \ 1281 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1282 "Threshold of number of revocations per type to permanently " \ 1283 "revoke biases of all objects in the heap of that type") \ 1284 \ 1285 product(intx, BiasedLockingDecayTime, 25000, \ 1286 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1287 "type after previous bulk rebias") \ 1288 \ 1289 develop(bool, JavaObjectsInPerm, false, \ 1290 "controls whether Classes and interned Strings are allocated" \ 1291 "in perm. This purely intended to allow debugging issues" \ 1292 "in production.") \ 1293 \ 1294 /* tracing */ \ 1295 \ 1296 notproduct(bool, TraceRuntimeCalls, false, \ 1297 "Trace run-time calls") \ 1298 \ 1299 develop(bool, TraceJNICalls, false, \ 1300 "Trace JNI calls") \ 1301 \ 1302 notproduct(bool, TraceJVMCalls, false, \ 1303 "Trace JVM calls") \ 1304 \ 1305 product(ccstr, TraceJVMTI, NULL, \ 1306 "Trace flags for JVMTI functions and events") \ 1307 \ 1308 /* This option can change an EMCP method into an obsolete method. */ \ 1309 /* This can affect tests that except specific methods to be EMCP. */ \ 1310 /* This option should be used with caution. */ \ 1311 product(bool, StressLdcRewrite, false, \ 1312 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1313 \ 1314 product(intx, TraceRedefineClasses, 0, \ 1315 "Trace level for JVMTI RedefineClasses") \ 1316 \ 1317 develop(bool, StressMethodComparator, false, \ 1318 "run the MethodComparator on all loaded methods") \ 1319 \ 1320 /* change to false by default sometime after Mustang */ \ 1321 product(bool, VerifyMergedCPBytecodes, true, \ 1322 "Verify bytecodes after RedefineClasses constant pool merging") \ 1323 \ 1324 develop(bool, TraceJNIHandleAllocation, false, \ 1325 "Trace allocation/deallocation of JNI handle blocks") \ 1326 \ 1327 develop(bool, TraceThreadEvents, false, \ 1328 "Trace all thread events") \ 1329 \ 1330 develop(bool, TraceBytecodes, false, \ 1331 "Trace bytecode execution") \ 1332 \ 1333 develop(bool, TraceClassInitialization, false, \ 1334 "Trace class initialization") \ 1335 \ 1336 develop(bool, TraceExceptions, false, \ 1337 "Trace exceptions") \ 1338 \ 1339 develop(bool, TraceICs, false, \ 1340 "Trace inline cache changes") \ 1341 \ 1342 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1343 "Trace method invocation counter overflow") \ 1344 \ 1345 develop(bool, TraceInlineCacheClearing, false, \ 1346 "Trace clearing of inline caches in nmethods") \ 1347 \ 1348 develop(bool, TraceDependencies, false, \ 1349 "Trace dependencies") \ 1350 \ 1351 develop(bool, VerifyDependencies, trueInDebug, \ 1352 "Exercise and verify the compilation dependency mechanism") \ 1353 \ 1354 develop(bool, TraceNewOopMapGeneration, false, \ 1355 "Trace OopMapGeneration") \ 1356 \ 1357 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1358 "Trace OopMapGeneration: print detailed cell states") \ 1359 \ 1360 develop(bool, TimeOopMap, false, \ 1361 "Time calls to GenerateOopMap::compute_map() in sum") \ 1362 \ 1363 develop(bool, TimeOopMap2, false, \ 1364 "Time calls to GenerateOopMap::compute_map() individually") \ 1365 \ 1366 develop(bool, TraceMonitorMismatch, false, \ 1367 "Trace monitor matching failures during OopMapGeneration") \ 1368 \ 1369 develop(bool, TraceOopMapRewrites, false, \ 1370 "Trace rewritting of method oops during oop map generation") \ 1371 \ 1372 develop(bool, TraceSafepoint, false, \ 1373 "Trace safepoint operations") \ 1374 \ 1375 develop(bool, TraceICBuffer, false, \ 1376 "Trace usage of IC buffer") \ 1377 \ 1378 develop(bool, TraceCompiledIC, false, \ 1379 "Trace changes of compiled IC") \ 1380 \ 1381 notproduct(bool, TraceZapDeadLocals, false, \ 1382 "Trace zapping dead locals") \ 1383 \ 1384 develop(bool, TraceStartupTime, false, \ 1385 "Trace setup time") \ 1386 \ 1387 product(ccstr, HPILibPath, NULL, \ 1388 "Specify alternate path to HPI library") \ 1389 \ 1390 develop(bool, TraceProtectionDomainVerification, false, \ 1391 "Trace protection domain verifcation") \ 1392 \ 1393 develop(bool, TraceClearedExceptions, false, \ 1394 "Prints when an exception is forcibly cleared") \ 1395 \ 1396 product(bool, TraceClassResolution, false, \ 1397 "Trace all constant pool resolutions (for debugging)") \ 1398 \ 1399 product(bool, TraceBiasedLocking, false, \ 1400 "Trace biased locking in JVM") \ 1401 \ 1402 product(bool, TraceMonitorInflation, false, \ 1403 "Trace monitor inflation in JVM") \ 1404 \ 1405 /* assembler */ \ 1406 product(bool, Use486InstrsOnly, false, \ 1407 "Use 80486 Compliant instruction subset") \ 1408 \ 1409 /* gc */ \ 1410 \ 1411 product(bool, UseSerialGC, false, \ 1412 "Use the serial garbage collector") \ 1413 \ 1414 product(bool, UseG1GC, false, \ 1415 "Use the Garbage-First garbage collector") \ 1416 \ 1417 product(bool, UseParallelGC, false, \ 1418 "Use the Parallel Scavenge garbage collector") \ 1419 \ 1420 product(bool, UseParallelOldGC, false, \ 1421 "Use the Parallel Old garbage collector") \ 1422 \ 1423 product(uintx, HeapMaximumCompactionInterval, 20, \ 1424 "How often should we maximally compact the heap (not allowing " \ 1425 "any dead space)") \ 1426 \ 1427 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1428 "The collection count for the first maximum compaction") \ 1429 \ 1430 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1431 "In the Parallel Old garbage collector maximum compaction for " \ 1432 "a system GC") \ 1433 \ 1434 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1435 "The mean used by the par compact dead wood" \ 1436 "limiter (a number between 0-100).") \ 1437 \ 1438 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1439 "The standard deviation used by the par compact dead wood" \ 1440 "limiter (a number between 0-100).") \ 1441 \ 1442 product(uintx, ParallelGCThreads, 0, \ 1443 "Number of parallel threads parallel gc will use") \ 1444 \ 1445 product(bool, UseDynamicNumberOfGCThreads, false, \ 1446 "Dynamically choose the number of parallel threads " \ 1447 "parallel gc will use") \ 1448 \ 1449 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1450 "Force dynamic selection of the number of" \ 1451 "parallel threads parallel gc will use to aid debugging") \ 1452 \ 1453 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1454 "Size of heap (bytes) per GC thread used in calculating the " \ 1455 "number of GC threads") \ 1456 \ 1457 product(bool, TraceDynamicGCThreads, false, \ 1458 "Trace the dynamic GC thread usage") \ 1459 \ 1460 develop(bool, ParallelOldGCSplitALot, false, \ 1461 "Provoke splitting (copying data from a young gen space to" \ 1462 "multiple destination spaces)") \ 1463 \ 1464 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1465 "How often to provoke splitting a young gen space") \ 1466 \ 1467 develop(bool, TraceRegionTasksQueuing, false, \ 1468 "Trace the queuing of the region tasks") \ 1469 \ 1470 product(uintx, ConcGCThreads, 0, \ 1471 "Number of threads concurrent gc will use") \ 1472 \ 1473 product(uintx, YoungPLABSize, 4096, \ 1474 "Size of young gen promotion labs (in HeapWords)") \ 1475 \ 1476 product(uintx, OldPLABSize, 1024, \ 1477 "Size of old gen promotion labs (in HeapWords)") \ 1478 \ 1479 product(uintx, GCTaskTimeStampEntries, 200, \ 1480 "Number of time stamp entries per gc worker thread") \ 1481 \ 1482 product(bool, AlwaysTenure, false, \ 1483 "Always tenure objects in eden. (ParallelGC only)") \ 1484 \ 1485 product(bool, NeverTenure, false, \ 1486 "Never tenure objects in eden, May tenure on overflow " \ 1487 "(ParallelGC only)") \ 1488 \ 1489 product(bool, ScavengeBeforeFullGC, true, \ 1490 "Scavenge youngest generation before each full GC, " \ 1491 "used with UseParallelGC") \ 1492 \ 1493 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1494 "Allow scavenges to occur when to_space contains objects.") \ 1495 \ 1496 product(bool, UseConcMarkSweepGC, false, \ 1497 "Use Concurrent Mark-Sweep GC in the old generation") \ 1498 \ 1499 product(bool, ExplicitGCInvokesConcurrent, false, \ 1500 "A System.gc() request invokes a concurrent collection;" \ 1501 " (effective only when UseConcMarkSweepGC)") \ 1502 \ 1503 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1504 "A System.gc() request invokes a concurrent collection and " \ 1505 "also unloads classes during such a concurrent gc cycle " \ 1506 "(effective only when UseConcMarkSweepGC)") \ 1507 \ 1508 product(bool, GCLockerInvokesConcurrent, false, \ 1509 "The exit of a JNI CS necessitating a scavenge also" \ 1510 " kicks off a bkgrd concurrent collection") \ 1511 \ 1512 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1513 "How much the GC can expand the eden by while the GC locker " \ 1514 "is active (as a percentage)") \ 1515 \ 1516 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1517 "Use Adaptive Free Lists in the CMS generation") \ 1518 \ 1519 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1520 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1521 \ 1522 develop(bool, RotateCMSCollectionTypes, false, \ 1523 "Rotate the CMS collections among concurrent and STW") \ 1524 \ 1525 product(bool, UseCMSBestFit, true, \ 1526 "Use CMS best fit allocation strategy") \ 1527 \ 1528 product(bool, UseCMSCollectionPassing, true, \ 1529 "Use passing of collection from background to foreground") \ 1530 \ 1531 product(bool, UseParNewGC, false, \ 1532 "Use parallel threads in the new generation.") \ 1533 \ 1534 product(bool, ParallelGCVerbose, false, \ 1535 "Verbose output for parallel GC.") \ 1536 \ 1537 product(intx, ParallelGCBufferWastePct, 10, \ 1538 "wasted fraction of parallel allocation buffer.") \ 1539 \ 1540 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1541 "Retain parallel allocation buffers across scavenges; " \ 1542 " -- disabled because this currently conflicts with " \ 1543 " parallel card scanning under certain conditions ") \ 1544 \ 1545 product(intx, TargetPLABWastePct, 10, \ 1546 "target wasted space in last buffer as pct of overall allocation")\ 1547 \ 1548 product(uintx, PLABWeight, 75, \ 1549 "Percentage (0-100) used to weight the current sample when" \ 1550 "computing exponentially decaying average for ResizePLAB.") \ 1551 \ 1552 product(bool, ResizePLAB, true, \ 1553 "Dynamically resize (survivor space) promotion labs") \ 1554 \ 1555 product(bool, PrintPLAB, false, \ 1556 "Print (survivor space) promotion labs sizing decisions") \ 1557 \ 1558 product(intx, ParGCArrayScanChunk, 50, \ 1559 "Scan a subset and push remainder, if array is bigger than this") \ 1560 \ 1561 product(bool, ParGCUseLocalOverflow, false, \ 1562 "Instead of a global overflow list, use local overflow stacks") \ 1563 \ 1564 product(bool, ParGCTrimOverflow, true, \ 1565 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1566 \ 1567 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1568 "Whether we should simulate work queue overflow in ParNew") \ 1569 \ 1570 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1571 "An `interval' counter that determines how frequently " \ 1572 "we simulate overflow; a smaller number increases frequency") \ 1573 \ 1574 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1575 "The desired number of objects to claim from the overflow list") \ 1576 \ 1577 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1578 "The number of strides per worker thread that we divide up the " \ 1579 "card table scanning work into") \ 1580 \ 1581 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1582 "The number of cards in each chunk of the parallel chunks used " \ 1583 "during card table scanning") \ 1584 \ 1585 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1586 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1587 "parallel GC.") \ 1588 \ 1589 product(uintx, OldPLABWeight, 50, \ 1590 "Percentage (0-100) used to weight the current sample when" \ 1591 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 1592 \ 1593 product(bool, ResizeOldPLAB, true, \ 1594 "Dynamically resize (old gen) promotion labs") \ 1595 \ 1596 product(bool, PrintOldPLAB, false, \ 1597 "Print (old gen) promotion labs sizing decisions") \ 1598 \ 1599 product(uintx, CMSOldPLABMin, 16, \ 1600 "Min size of CMS gen promotion lab caches per worker per blksize")\ 1601 \ 1602 product(uintx, CMSOldPLABMax, 1024, \ 1603 "Max size of CMS gen promotion lab caches per worker per blksize")\ 1604 \ 1605 product(uintx, CMSOldPLABNumRefills, 4, \ 1606 "Nominal number of refills of CMS gen promotion lab cache" \ 1607 " per worker per block size") \ 1608 \ 1609 product(bool, CMSOldPLABResizeQuicker, false, \ 1610 "Whether to react on-the-fly during a scavenge to a sudden" \ 1611 " change in block demand rate") \ 1612 \ 1613 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1614 "The tolerance of the phase-change detector for on-the-fly" \ 1615 " PLAB resizing during a scavenge") \ 1616 \ 1617 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1618 "The gain in the feedback loop for on-the-fly PLAB resizing" \ 1619 " during a scavenge") \ 1620 \ 1621 product(uintx, CMSOldPLABReactivityCeiling, 10, \ 1622 "The clamping of the gain in the feedback loop for on-the-fly" \ 1623 " PLAB resizing during a scavenge") \ 1624 \ 1625 product(bool, AlwaysPreTouch, false, \ 1626 "It forces all freshly committed pages to be pre-touched.") \ 1627 \ 1628 product_pd(intx, CMSYoungGenPerWorker, \ 1629 "The maximum size of young gen chosen by default per GC worker " \ 1630 "thread available") \ 1631 \ 1632 product(bool, GCOverheadReporting, false, \ 1633 "Enables the GC overhead reporting facility") \ 1634 \ 1635 product(intx, GCOverheadReportingPeriodMS, 100, \ 1636 "Reporting period for conc GC overhead reporting, in ms ") \ 1637 \ 1638 product(bool, CMSIncrementalMode, false, \ 1639 "Whether CMS GC should operate in \"incremental\" mode") \ 1640 \ 1641 product(uintx, CMSIncrementalDutyCycle, 10, \ 1642 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1643 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1644 "value") \ 1645 \ 1646 product(bool, CMSIncrementalPacing, true, \ 1647 "Whether the CMS incremental mode duty cycle should be " \ 1648 "automatically adjusted") \ 1649 \ 1650 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1651 "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1652 "enabled (a percentage, 0-100)") \ 1653 \ 1654 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1655 "Percentage (0-100) used to add conservatism when computing the " \ 1656 "duty cycle") \ 1657 \ 1658 product(uintx, CMSIncrementalOffset, 0, \ 1659 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1660 " is shifted to the right within the period between young GCs") \ 1661 \ 1662 product(uintx, CMSExpAvgFactor, 50, \ 1663 "Percentage (0-100) used to weight the current sample when" \ 1664 "computing exponential averages for CMS statistics.") \ 1665 \ 1666 product(uintx, CMS_FLSWeight, 75, \ 1667 "Percentage (0-100) used to weight the current sample when" \ 1668 "computing exponentially decating averages for CMS FLS statistics.") \ 1669 \ 1670 product(uintx, CMS_FLSPadding, 1, \ 1671 "The multiple of deviation from mean to use for buffering" \ 1672 "against volatility in free list demand.") \ 1673 \ 1674 product(uintx, FLSCoalescePolicy, 2, \ 1675 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1676 \ 1677 product(bool, FLSAlwaysCoalesceLarge, false, \ 1678 "CMS: Larger free blocks are always available for coalescing") \ 1679 \ 1680 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1681 "CMS: the smaller the percentage the greater the coalition force")\ 1682 \ 1683 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1684 "CMS: the factor by which to inflate estimated demand of small" \ 1685 " block sizes to prevent coalescing with an adjoining block") \ 1686 \ 1687 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1688 "CMS: the factor by which to inflate estimated demand of large" \ 1689 " block sizes to prevent coalescing with an adjoining block") \ 1690 \ 1691 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1692 "CMS: the factor by which to inflate estimated demand of small" \ 1693 " block sizes to prevent splitting to supply demand for smaller" \ 1694 " blocks") \ 1695 \ 1696 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1697 "CMS: the factor by which to inflate estimated demand of large" \ 1698 " block sizes to prevent splitting to supply demand for smaller" \ 1699 " blocks") \ 1700 \ 1701 product(bool, CMSExtrapolateSweep, false, \ 1702 "CMS: cushion for block demand during sweep") \ 1703 \ 1704 product(uintx, CMS_SweepWeight, 75, \ 1705 "Percentage (0-100) used to weight the current sample when " \ 1706 "computing exponentially decaying average for inter-sweep " \ 1707 "duration") \ 1708 \ 1709 product(uintx, CMS_SweepPadding, 1, \ 1710 "The multiple of deviation from mean to use for buffering " \ 1711 "against volatility in inter-sweep duration.") \ 1712 \ 1713 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1714 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1715 "duration exceeds this threhold in milliseconds") \ 1716 \ 1717 develop(bool, CMSTraceIncrementalMode, false, \ 1718 "Trace CMS incremental mode") \ 1719 \ 1720 develop(bool, CMSTraceIncrementalPacing, false, \ 1721 "Trace CMS incremental mode pacing computation") \ 1722 \ 1723 develop(bool, CMSTraceThreadState, false, \ 1724 "Trace the CMS thread state (enable the trace_state() method)") \ 1725 \ 1726 product(bool, CMSClassUnloadingEnabled, false, \ 1727 "Whether class unloading enabled when using CMS GC") \ 1728 \ 1729 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1730 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1731 " for which classes may not be unloaded") \ 1732 \ 1733 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1734 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1735 \ 1736 product(bool, UseCMSCompactAtFullCollection, true, \ 1737 "Use mark sweep compact at full collections") \ 1738 \ 1739 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1740 "Number of CMS full collection done before compaction if > 0") \ 1741 \ 1742 develop(intx, CMSDictionaryChoice, 0, \ 1743 "Use BinaryTreeDictionary as default in the CMS generation") \ 1744 \ 1745 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1746 "Replenish an indexed free list with this number of chunks") \ 1747 \ 1748 product(bool, CMSReplenishIntermediate, true, \ 1749 "Replenish all intermediate free-list caches") \ 1750 \ 1751 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1752 "When satisfying batched demand, split blocks from the " \ 1753 "IndexedFreeList whose size is a multiple of requested size") \ 1754 \ 1755 product(bool, CMSLoopWarn, false, \ 1756 "Warn in case of excessive CMS looping") \ 1757 \ 1758 develop(bool, CMSOverflowEarlyRestoration, false, \ 1759 "Whether preserved marks should be restored early") \ 1760 \ 1761 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1762 "Size of marking stack") \ 1763 \ 1764 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1765 "Max size of marking stack") \ 1766 \ 1767 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1768 "Whether we should simulate frequent marking stack / work queue" \ 1769 " overflow") \ 1770 \ 1771 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1772 "An `interval' counter that determines how frequently" \ 1773 " we simulate overflow; a smaller number increases frequency") \ 1774 \ 1775 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1776 "(Temporary, subject to experimentation)" \ 1777 "Maximum number of abortable preclean iterations, if > 0") \ 1778 \ 1779 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1780 "(Temporary, subject to experimentation)" \ 1781 "Maximum time in abortable preclean in ms") \ 1782 \ 1783 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1784 "(Temporary, subject to experimentation)" \ 1785 "Nominal minimum work per abortable preclean iteration") \ 1786 \ 1787 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1788 "(Temporary, subject to experimentation)" \ 1789 " Time that we sleep between iterations when not given" \ 1790 " enough work per iteration") \ 1791 \ 1792 product(uintx, CMSRescanMultiple, 32, \ 1793 "Size (in cards) of CMS parallel rescan task") \ 1794 \ 1795 product(uintx, CMSConcMarkMultiple, 32, \ 1796 "Size (in cards) of CMS concurrent MT marking task") \ 1797 \ 1798 product(uintx, CMSRevisitStackSize, 1*M, \ 1799 "Size of CMS KlassKlass revisit stack") \ 1800 \ 1801 product(bool, CMSAbortSemantics, false, \ 1802 "Whether abort-on-overflow semantics is implemented") \ 1803 \ 1804 product(bool, CMSParallelRemarkEnabled, true, \ 1805 "Whether parallel remark enabled (only if ParNewGC)") \ 1806 \ 1807 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1808 "Whether parallel remark of survivor space" \ 1809 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1810 \ 1811 product(bool, CMSPLABRecordAlways, true, \ 1812 "Whether to always record survivor space PLAB bdries" \ 1813 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1814 \ 1815 product(bool, CMSConcurrentMTEnabled, true, \ 1816 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1817 \ 1818 product(bool, CMSPermGenPrecleaningEnabled, true, \ 1819 "Whether concurrent precleaning enabled in perm gen" \ 1820 " (effective only when CMSPrecleaningEnabled is true)") \ 1821 \ 1822 product(bool, CMSPrecleaningEnabled, true, \ 1823 "Whether concurrent precleaning enabled") \ 1824 \ 1825 product(uintx, CMSPrecleanIter, 3, \ 1826 "Maximum number of precleaning iteration passes") \ 1827 \ 1828 product(uintx, CMSPrecleanNumerator, 2, \ 1829 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1830 " ratio") \ 1831 \ 1832 product(uintx, CMSPrecleanDenominator, 3, \ 1833 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1834 " ratio") \ 1835 \ 1836 product(bool, CMSPrecleanRefLists1, true, \ 1837 "Preclean ref lists during (initial) preclean phase") \ 1838 \ 1839 product(bool, CMSPrecleanRefLists2, false, \ 1840 "Preclean ref lists during abortable preclean phase") \ 1841 \ 1842 product(bool, CMSPrecleanSurvivors1, false, \ 1843 "Preclean survivors during (initial) preclean phase") \ 1844 \ 1845 product(bool, CMSPrecleanSurvivors2, true, \ 1846 "Preclean survivors during abortable preclean phase") \ 1847 \ 1848 product(uintx, CMSPrecleanThreshold, 1000, \ 1849 "Don't re-iterate if #dirty cards less than this") \ 1850 \ 1851 product(bool, CMSCleanOnEnter, true, \ 1852 "Clean-on-enter optimization for reducing number of dirty cards") \ 1853 \ 1854 product(uintx, CMSRemarkVerifyVariant, 1, \ 1855 "Choose variant (1,2) of verification following remark") \ 1856 \ 1857 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1858 "If Eden used is below this value, don't try to schedule remark") \ 1859 \ 1860 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1861 "The Eden occupancy % at which to try and schedule remark pause") \ 1862 \ 1863 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1864 "Start sampling Eden top at least before yg occupancy reaches" \ 1865 " 1/<ratio> of the size at which we plan to schedule remark") \ 1866 \ 1867 product(uintx, CMSSamplingGrain, 16*K, \ 1868 "The minimum distance between eden samples for CMS (see above)") \ 1869 \ 1870 product(bool, CMSScavengeBeforeRemark, false, \ 1871 "Attempt scavenge before the CMS remark step") \ 1872 \ 1873 develop(bool, CMSTraceSweeper, false, \ 1874 "Trace some actions of the CMS sweeper") \ 1875 \ 1876 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1877 "Don't drain below this size per parallel worker/thief") \ 1878 \ 1879 manageable(intx, CMSWaitDuration, 2000, \ 1880 "Time in milliseconds that CMS thread waits for young GC") \ 1881 \ 1882 product(bool, CMSYield, true, \ 1883 "Yield between steps of concurrent mark & sweep") \ 1884 \ 1885 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1886 "Bitmap operations should process at most this many bits" \ 1887 "between yields") \ 1888 \ 1889 product(bool, CMSDumpAtPromotionFailure, false, \ 1890 "Dump useful information about the state of the CMS old " \ 1891 " generation upon a promotion failure.") \ 1892 \ 1893 product(bool, CMSPrintChunksInDump, false, \ 1894 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1895 " more detailed information about the free chunks.") \ 1896 \ 1897 product(bool, CMSPrintObjectsInDump, false, \ 1898 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1899 " more detailed information about the allocated objects.") \ 1900 \ 1901 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1902 "Verify that all refs across the FLS boundary " \ 1903 " are to valid objects") \ 1904 \ 1905 diagnostic(bool, FLSVerifyLists, false, \ 1906 "Do lots of (expensive) FreeListSpace verification") \ 1907 \ 1908 diagnostic(bool, FLSVerifyIndexTable, false, \ 1909 "Do lots of (expensive) FLS index table verification") \ 1910 \ 1911 develop(bool, FLSVerifyDictionary, false, \ 1912 "Do lots of (expensive) FLS dictionary verification") \ 1913 \ 1914 develop(bool, VerifyBlockOffsetArray, false, \ 1915 "Do (expensive!) block offset array verification") \ 1916 \ 1917 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1918 "Maintain _unallocated_block in BlockOffsetArray" \ 1919 " (currently applicable only to CMS collector)") \ 1920 \ 1921 develop(bool, TraceCMSState, false, \ 1922 "Trace the state of the CMS collection") \ 1923 \ 1924 product(intx, RefDiscoveryPolicy, 0, \ 1925 "Whether reference-based(0) or referent-based(1)") \ 1926 \ 1927 product(bool, ParallelRefProcEnabled, false, \ 1928 "Enable parallel reference processing whenever possible") \ 1929 \ 1930 product(bool, ParallelRefProcBalancingEnabled, true, \ 1931 "Enable balancing of reference processing queues") \ 1932 \ 1933 product(intx, CMSTriggerRatio, 80, \ 1934 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1935 "allocated before a CMS collection cycle commences") \ 1936 \ 1937 product(intx, CMSTriggerPermRatio, 80, \ 1938 "Percentage of MinHeapFreeRatio in the CMS perm generation that " \ 1939 "is allocated before a CMS collection cycle commences, that " \ 1940 "also collects the perm generation") \ 1941 \ 1942 product(uintx, CMSBootstrapOccupancy, 50, \ 1943 "Percentage CMS generation occupancy at which to " \ 1944 "initiate CMS collection for bootstrapping collection stats") \ 1945 \ 1946 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1947 "Percentage CMS generation occupancy to start a CMS collection " \ 1948 "cycle. A negative value means that CMSTriggerRatio is used") \ 1949 \ 1950 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1951 "Percentage of the (entire) heap occupancy to start a " \ 1952 "concurrent GC cycle. It us used by GCs that trigger a " \ 1953 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1954 "not just one of the generations (e.g., G1). A value of 0 " \ 1955 "denotes 'do constant GC cycles'.") \ 1956 \ 1957 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 1958 "Percentage CMS perm generation occupancy to start a " \ 1959 "CMScollection cycle. A negative value means that " \ 1960 "CMSTriggerPermRatio is used") \ 1961 \ 1962 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1963 "Only use occupancy as a crierion for starting a CMS collection") \ 1964 \ 1965 product(intx, CMSIsTooFullPercentage, 98, \ 1966 "An absolute ceiling above which CMS will always consider the " \ 1967 "perm gen ripe for collection") \ 1968 \ 1969 develop(bool, CMSTestInFreeList, false, \ 1970 "Check if the coalesced range is already in the " \ 1971 "free lists as claimed") \ 1972 \ 1973 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1974 "Check that all the garbage collected was returned to the " \ 1975 "free lists.") \ 1976 \ 1977 notproduct(bool, ScavengeALot, false, \ 1978 "Force scavenge at every Nth exit from the runtime system " \ 1979 "(N=ScavengeALotInterval)") \ 1980 \ 1981 develop(bool, FullGCALot, false, \ 1982 "Force full gc at every Nth exit from the runtime system " \ 1983 "(N=FullGCALotInterval)") \ 1984 \ 1985 notproduct(bool, GCALotAtAllSafepoints, false, \ 1986 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1987 \ 1988 product(bool, PrintPromotionFailure, false, \ 1989 "Print additional diagnostic information following " \ 1990 " promotion failure") \ 1991 \ 1992 notproduct(bool, PromotionFailureALot, false, \ 1993 "Use promotion failure handling on every youngest generation " \ 1994 "collection") \ 1995 \ 1996 develop(uintx, PromotionFailureALotCount, 1000, \ 1997 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1998 "refill attempts (ParNew) or promotion attempts " \ 1999 "(other young collectors) ") \ 2000 \ 2001 develop(uintx, PromotionFailureALotInterval, 5, \ 2002 "Total collections between promotion failures alot") \ 2003 \ 2004 experimental(intx, WorkStealingSleepMillis, 1, \ 2005 "Sleep time when sleep is used for yields") \ 2006 \ 2007 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2008 "Number of yields before a sleep is done during workstealing") \ 2009 \ 2010 experimental(uintx, WorkStealingHardSpins, 4096, \ 2011 "Number of iterations in a spin loop between checks on " \ 2012 "time out of hard spin") \ 2013 \ 2014 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2015 "Ratio of hard spins to calls to yield") \ 2016 \ 2017 product(uintx, PreserveMarkStackSize, 1024, \ 2018 "Size for stack used in promotion failure handling") \ 2019 \ 2020 develop(uintx, ObjArrayMarkingStride, 512, \ 2021 "Number of ObjArray elements to push onto the marking stack" \ 2022 "before pushing a continuation entry") \ 2023 \ 2024 notproduct(bool, ExecuteInternalVMTests, false, \ 2025 "Enable execution of internal VM tests.") \ 2026 \ 2027 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2028 \ 2029 product_pd(bool, ResizeTLAB, \ 2030 "Dynamically resize tlab size for threads") \ 2031 \ 2032 product(bool, ZeroTLAB, false, \ 2033 "Zero out the newly created TLAB") \ 2034 \ 2035 product(bool, FastTLABRefill, true, \ 2036 "Use fast TLAB refill code") \ 2037 \ 2038 product(bool, PrintTLAB, false, \ 2039 "Print various TLAB related information") \ 2040 \ 2041 product(bool, TLABStats, true, \ 2042 "Print various TLAB related information") \ 2043 \ 2044 product(bool, UseBlockZeroing, false, \ 2045 "Use special cpu instructions for block zeroing") \ 2046 \ 2047 product(intx, BlockZeroingLowLimit, 2048, \ 2048 "Minimum size in bytes when block zeroing will be used") \ 2049 \ 2050 product(bool, UseBlockCopy, false, \ 2051 "Use special cpu instructions for block copy") \ 2052 \ 2053 product(intx, BlockCopyLowLimit, 2048, \ 2054 "Minimum size in bytes when block copy will be used") \ 2055 \ 2056 product(bool, PrintRevisitStats, false, \ 2057 "Print revisit (klass and MDO) stack related information") \ 2058 \ 2059 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 2060 "Enable LowMemoryProtection")) \ 2061 \ 2062 product_pd(bool, NeverActAsServerClassMachine, \ 2063 "Never act like a server-class machine") \ 2064 \ 2065 product(bool, AlwaysActAsServerClassMachine, false, \ 2066 "Always act like a server-class machine") \ 2067 \ 2068 product_pd(uint64_t, MaxRAM, \ 2069 "Real memory size (in bytes) used to set maximum heap size") \ 2070 \ 2071 product(uintx, ErgoHeapSizeLimit, 0, \ 2072 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2073 "MaxRAM / MaxRAMFraction") \ 2074 \ 2075 product(uintx, MaxRAMFraction, 4, \ 2076 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2077 "size") \ 2078 \ 2079 product(uintx, DefaultMaxRAMFraction, 4, \ 2080 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2081 "size; deprecated: to be renamed to MaxRAMFraction") \ 2082 \ 2083 product(uintx, MinRAMFraction, 2, \ 2084 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 2085 "size on systems with small physical memory size") \ 2086 \ 2087 product(uintx, InitialRAMFraction, 64, \ 2088 "Fraction (1/n) of real memory used for initial heap size") \ 2089 \ 2090 product(bool, UseAutoGCSelectPolicy, false, \ 2091 "Use automatic collection selection policy") \ 2092 \ 2093 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2094 "Automatic GC selection pause threshhold in ms") \ 2095 \ 2096 product(bool, UseAdaptiveSizePolicy, true, \ 2097 "Use adaptive generation sizing policies") \ 2098 \ 2099 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2100 "Use adaptive survivor sizing policies") \ 2101 \ 2102 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2103 "Use adaptive young-old sizing policies at minor collections") \ 2104 \ 2105 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2106 "Use adaptive young-old sizing policies at major collections") \ 2107 \ 2108 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2109 "Use statistics from System.GC for adaptive size policy") \ 2110 \ 2111 product(bool, UseAdaptiveGCBoundary, false, \ 2112 "Allow young-old boundary to move") \ 2113 \ 2114 develop(bool, TraceAdaptiveGCBoundary, false, \ 2115 "Trace young-old boundary moves") \ 2116 \ 2117 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2118 "Resize the virtual spaces of the young or old generations") \ 2119 \ 2120 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2121 "Policy for changeing generation size for throughput goals") \ 2122 \ 2123 product(uintx, AdaptiveSizePausePolicy, 0, \ 2124 "Policy for changing generation size for pause goals") \ 2125 \ 2126 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2127 "Adjust tenured generation to achive a minor pause goal") \ 2128 \ 2129 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2130 "Adjust young generation to achive a major pause goal") \ 2131 \ 2132 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2133 "Number of steps where heuristics is used before data is used") \ 2134 \ 2135 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2136 "Number of collections before the adaptive sizing is started") \ 2137 \ 2138 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2139 "Collecton interval for printing information; zero => never") \ 2140 \ 2141 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2142 "Use adaptive minimum footprint as a goal") \ 2143 \ 2144 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2145 "Weight given to exponential resizing, between 0 and 100") \ 2146 \ 2147 product(uintx, AdaptiveTimeWeight, 25, \ 2148 "Weight given to time in adaptive policy, between 0 and 100") \ 2149 \ 2150 product(uintx, PausePadding, 1, \ 2151 "How much buffer to keep for pause time") \ 2152 \ 2153 product(uintx, PromotedPadding, 3, \ 2154 "How much buffer to keep for promotion failure") \ 2155 \ 2156 product(uintx, SurvivorPadding, 3, \ 2157 "How much buffer to keep for survivor overflow") \ 2158 \ 2159 product(uintx, AdaptivePermSizeWeight, 20, \ 2160 "Weight for perm gen exponential resizing, between 0 and 100") \ 2161 \ 2162 product(uintx, PermGenPadding, 3, \ 2163 "How much buffer to keep for perm gen sizing") \ 2164 \ 2165 product(uintx, ThresholdTolerance, 10, \ 2166 "Allowed collection cost difference between generations") \ 2167 \ 2168 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2169 "If collection costs are within margin, reduce both by full " \ 2170 "delta") \ 2171 \ 2172 product(uintx, YoungGenerationSizeIncrement, 20, \ 2173 "Adaptive size percentage change in young generation") \ 2174 \ 2175 product(uintx, YoungGenerationSizeSupplement, 80, \ 2176 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2177 \ 2178 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2179 "Decay factor to YoungedGenerationSizeSupplement") \ 2180 \ 2181 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2182 "Adaptive size percentage change in tenured generation") \ 2183 \ 2184 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2185 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2186 \ 2187 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2188 "Decay factor to TenuredGenerationSizeIncrement") \ 2189 \ 2190 product(uintx, MaxGCPauseMillis, max_uintx, \ 2191 "Adaptive size policy maximum GC pause time goal in msec, " \ 2192 "or (G1 Only) the max. GC time per MMU time slice") \ 2193 \ 2194 product(uintx, GCPauseIntervalMillis, 0, \ 2195 "Time slice for MMU specification") \ 2196 \ 2197 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2198 "Adaptive size policy maximum GC minor pause time goal in msec") \ 2199 \ 2200 product(uintx, GCTimeRatio, 99, \ 2201 "Adaptive size policy application time to GC time ratio") \ 2202 \ 2203 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2204 "Adaptive size scale down factor for shrinking") \ 2205 \ 2206 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2207 "Adaptive size decays the major cost for long major intervals") \ 2208 \ 2209 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2210 "Time scale over which major costs decay") \ 2211 \ 2212 product(uintx, MinSurvivorRatio, 3, \ 2213 "Minimum ratio of young generation/survivor space size") \ 2214 \ 2215 product(uintx, InitialSurvivorRatio, 8, \ 2216 "Initial ratio of eden/survivor space size") \ 2217 \ 2218 product(uintx, BaseFootPrintEstimate, 256*M, \ 2219 "Estimate of footprint other than Java Heap") \ 2220 \ 2221 product(bool, UseGCOverheadLimit, true, \ 2222 "Use policy to limit of proportion of time spent in GC " \ 2223 "before an OutOfMemory error is thrown") \ 2224 \ 2225 product(uintx, GCTimeLimit, 98, \ 2226 "Limit of proportion of time spent in GC before an OutOfMemory" \ 2227 "error is thrown (used with GCHeapFreeLimit)") \ 2228 \ 2229 product(uintx, GCHeapFreeLimit, 2, \ 2230 "Minimum percentage of free space after a full GC before an " \ 2231 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2232 \ 2233 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2234 "Number of consecutive collections before gc time limit fires") \ 2235 \ 2236 product(bool, PrintAdaptiveSizePolicy, false, \ 2237 "Print information about AdaptiveSizePolicy") \ 2238 \ 2239 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2240 "How far ahead to prefetch destination area (<= 0 means off)") \ 2241 \ 2242 product(intx, PrefetchScanIntervalInBytes, -1, \ 2243 "How far ahead to prefetch scan area (<= 0 means off)") \ 2244 \ 2245 product(intx, PrefetchFieldsAhead, -1, \ 2246 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2247 \ 2248 develop(bool, UsePrefetchQueue, true, \ 2249 "Use the prefetch queue during PS promotion") \ 2250 \ 2251 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2252 "Verify system before exiting") \ 2253 \ 2254 diagnostic(bool, VerifyBeforeGC, false, \ 2255 "Verify memory system before GC") \ 2256 \ 2257 diagnostic(bool, VerifyAfterGC, false, \ 2258 "Verify memory system after GC") \ 2259 \ 2260 diagnostic(bool, VerifyDuringGC, false, \ 2261 "Verify memory system during GC (between phases)") \ 2262 \ 2263 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2264 "Enable parallel memory system verification") \ 2265 \ 2266 diagnostic(bool, DeferInitialCardMark, false, \ 2267 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2268 "may arise from new_pre_store_barrier") \ 2269 \ 2270 diagnostic(bool, VerifyRememberedSets, false, \ 2271 "Verify GC remembered sets") \ 2272 \ 2273 diagnostic(bool, VerifyObjectStartArray, true, \ 2274 "Verify GC object start array if verify before/after") \ 2275 \ 2276 product(bool, DisableExplicitGC, false, \ 2277 "Tells whether calling System.gc() does a full GC") \ 2278 \ 2279 notproduct(bool, CheckMemoryInitialization, false, \ 2280 "Checks memory initialization") \ 2281 \ 2282 product(bool, CollectGen0First, false, \ 2283 "Collect youngest generation before each full GC") \ 2284 \ 2285 diagnostic(bool, BindCMSThreadToCPU, false, \ 2286 "Bind CMS Thread to CPU if possible") \ 2287 \ 2288 diagnostic(uintx, CPUForCMSThread, 0, \ 2289 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2290 \ 2291 product(bool, BindGCTaskThreadsToCPUs, false, \ 2292 "Bind GCTaskThreads to CPUs if possible") \ 2293 \ 2294 product(bool, UseGCTaskAffinity, false, \ 2295 "Use worker affinity when asking for GCTasks") \ 2296 \ 2297 product(uintx, ProcessDistributionStride, 4, \ 2298 "Stride through processors when distributing processes") \ 2299 \ 2300 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2301 "number of times the coordinator GC thread will sleep while " \ 2302 "yielding before giving up and resuming GC") \ 2303 \ 2304 product(uintx, CMSYieldSleepCount, 0, \ 2305 "number of times a GC thread (minus the coordinator) " \ 2306 "will sleep while yielding before giving up and resuming GC") \ 2307 \ 2308 /* gc tracing */ \ 2309 manageable(bool, PrintGC, false, \ 2310 "Print message at garbage collect") \ 2311 \ 2312 manageable(bool, PrintGCDetails, false, \ 2313 "Print more details at garbage collect") \ 2314 \ 2315 manageable(bool, PrintGCDateStamps, false, \ 2316 "Print date stamps at garbage collect") \ 2317 \ 2318 manageable(bool, PrintGCTimeStamps, false, \ 2319 "Print timestamps at garbage collect") \ 2320 \ 2321 product(bool, PrintGCTaskTimeStamps, false, \ 2322 "Print timestamps for individual gc worker thread tasks") \ 2323 \ 2324 develop(intx, ConcGCYieldTimeout, 0, \ 2325 "If non-zero, assert that GC threads yield within this # of ms.") \ 2326 \ 2327 notproduct(bool, TraceMarkSweep, false, \ 2328 "Trace mark sweep") \ 2329 \ 2330 product(bool, PrintReferenceGC, false, \ 2331 "Print times spent handling reference objects during GC " \ 2332 " (enabled only when PrintGCDetails)") \ 2333 \ 2334 develop(bool, TraceReferenceGC, false, \ 2335 "Trace handling of soft/weak/final/phantom references") \ 2336 \ 2337 develop(bool, TraceFinalizerRegistration, false, \ 2338 "Trace registration of final references") \ 2339 \ 2340 notproduct(bool, TraceScavenge, false, \ 2341 "Trace scavenge") \ 2342 \ 2343 product_rw(bool, TraceClassLoading, false, \ 2344 "Trace all classes loaded") \ 2345 \ 2346 product(bool, TraceClassLoadingPreorder, false, \ 2347 "Trace all classes loaded in order referenced (not loaded)") \ 2348 \ 2349 product_rw(bool, TraceClassUnloading, false, \ 2350 "Trace unloading of classes") \ 2351 \ 2352 product_rw(bool, TraceLoaderConstraints, false, \ 2353 "Trace loader constraints") \ 2354 \ 2355 product(bool, TraceGen0Time, false, \ 2356 "Trace accumulated time for Gen 0 collection") \ 2357 \ 2358 product(bool, TraceGen1Time, false, \ 2359 "Trace accumulated time for Gen 1 collection") \ 2360 \ 2361 product(bool, PrintTenuringDistribution, false, \ 2362 "Print tenuring age information") \ 2363 \ 2364 product_rw(bool, PrintHeapAtGC, false, \ 2365 "Print heap layout before and after each GC") \ 2366 \ 2367 product_rw(bool, PrintHeapAtGCExtended, false, \ 2368 "Prints extended information about the layout of the heap " \ 2369 "when -XX:+PrintHeapAtGC is set") \ 2370 \ 2371 product(bool, PrintHeapAtSIGBREAK, true, \ 2372 "Print heap layout in response to SIGBREAK") \ 2373 \ 2374 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2375 "Print a class histogram before any major stop-world GC") \ 2376 \ 2377 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2378 "Print a class histogram after any major stop-world GC") \ 2379 \ 2380 manageable(bool, PrintClassHistogram, false, \ 2381 "Print a histogram of class instances") \ 2382 \ 2383 develop(bool, TraceWorkGang, false, \ 2384 "Trace activities of work gangs") \ 2385 \ 2386 product(bool, TraceParallelOldGCTasks, false, \ 2387 "Trace multithreaded GC activity") \ 2388 \ 2389 develop(bool, TraceBlockOffsetTable, false, \ 2390 "Print BlockOffsetTable maps") \ 2391 \ 2392 develop(bool, TraceCardTableModRefBS, false, \ 2393 "Print CardTableModRefBS maps") \ 2394 \ 2395 develop(bool, TraceGCTaskManager, false, \ 2396 "Trace actions of the GC task manager") \ 2397 \ 2398 develop(bool, TraceGCTaskQueue, false, \ 2399 "Trace actions of the GC task queues") \ 2400 \ 2401 diagnostic(bool, TraceGCTaskThread, false, \ 2402 "Trace actions of the GC task threads") \ 2403 \ 2404 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2405 "Print the time taken by each parallel old gc phase." \ 2406 "PrintGCDetails must also be enabled.") \ 2407 \ 2408 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2409 "Trace parallel old gc marking phase") \ 2410 \ 2411 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2412 "Trace parallel old gc summary phase") \ 2413 \ 2414 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2415 "Trace parallel old gc compaction phase") \ 2416 \ 2417 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2418 "Trace parallel old gc dense prefix computation") \ 2419 \ 2420 develop(bool, IgnoreLibthreadGPFault, false, \ 2421 "Suppress workaround for libthread GP fault") \ 2422 \ 2423 product(bool, PrintJNIGCStalls, false, \ 2424 "Print diagnostic message when GC is stalled" \ 2425 "by JNI critical section") \ 2426 \ 2427 /* GC log rotation setting */ \ 2428 \ 2429 product(bool, UseGCLogFileRotation, false, \ 2430 "Prevent large gclog file for long running app. " \ 2431 "Requires -Xloggc:<filename>") \ 2432 \ 2433 product(uintx, NumberOfGCLogFiles, 0, \ 2434 "Number of gclog files in rotation, " \ 2435 "Default: 0, no rotation") \ 2436 \ 2437 product(uintx, GCLogFileSize, 0, \ 2438 "GC log file size, Default: 0 bytes, no rotation " \ 2439 "Only valid with UseGCLogFileRotation") \ 2440 \ 2441 /* JVMTI heap profiling */ \ 2442 \ 2443 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2444 "Trace JVMTI object tagging calls") \ 2445 \ 2446 diagnostic(bool, VerifyBeforeIteration, false, \ 2447 "Verify memory system before JVMTI iteration") \ 2448 \ 2449 /* compiler interface */ \ 2450 \ 2451 develop(bool, CIPrintCompilerName, false, \ 2452 "when CIPrint is active, print the name of the active compiler") \ 2453 \ 2454 develop(bool, CIPrintCompileQueue, false, \ 2455 "display the contents of the compile queue whenever a " \ 2456 "compilation is enqueued") \ 2457 \ 2458 develop(bool, CIPrintRequests, false, \ 2459 "display every request for compilation") \ 2460 \ 2461 product(bool, CITime, false, \ 2462 "collect timing information for compilation") \ 2463 \ 2464 develop(bool, CITimeEach, false, \ 2465 "display timing information after each successful compilation") \ 2466 \ 2467 develop(bool, CICountOSR, true, \ 2468 "use a separate counter when assigning ids to osr compilations") \ 2469 \ 2470 develop(bool, CICompileNatives, true, \ 2471 "compile native methods if supported by the compiler") \ 2472 \ 2473 develop_pd(bool, CICompileOSR, \ 2474 "compile on stack replacement methods if supported by the " \ 2475 "compiler") \ 2476 \ 2477 develop(bool, CIPrintMethodCodes, false, \ 2478 "print method bytecodes of the compiled code") \ 2479 \ 2480 develop(bool, CIPrintTypeFlow, false, \ 2481 "print the results of ciTypeFlow analysis") \ 2482 \ 2483 develop(bool, CITraceTypeFlow, false, \ 2484 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2485 \ 2486 develop(intx, CICloneLoopTestLimit, 100, \ 2487 "size limit for blocks heuristically cloned in ciTypeFlow") \ 2488 \ 2489 develop(intx, OSROnlyBCI, -1, \ 2490 "OSR only at this bci. Negative values mean exclude that bci") \ 2491 \ 2492 /* temp diagnostics */ \ 2493 \ 2494 diagnostic(bool, TraceRedundantCompiles, false, \ 2495 "Have compile broker print when a request already in the queue is"\ 2496 " requested again") \ 2497 \ 2498 diagnostic(bool, InitialCompileFast, false, \ 2499 "Initial compile at CompLevel_fast_compile") \ 2500 \ 2501 diagnostic(bool, InitialCompileReallyFast, false, \ 2502 "Initial compile at CompLevel_really_fast_compile (no profile)") \ 2503 \ 2504 diagnostic(bool, FullProfileOnReInterpret, true, \ 2505 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 2506 \ 2507 /* compiler */ \ 2508 \ 2509 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2510 "Number of compiler threads to run") \ 2511 \ 2512 product(intx, CompilationPolicyChoice, 0, \ 2513 "which compilation policy (0/1)") \ 2514 \ 2515 develop(bool, UseStackBanging, true, \ 2516 "use stack banging for stack overflow checks (required for " \ 2517 "proper StackOverflow handling; disable only to measure cost " \ 2518 "of stackbanging)") \ 2519 \ 2520 develop(bool, Use24BitFPMode, true, \ 2521 "Set 24-bit FPU mode on a per-compile basis ") \ 2522 \ 2523 develop(bool, Use24BitFP, true, \ 2524 "use FP instructions that produce 24-bit precise results") \ 2525 \ 2526 develop(bool, UseStrictFP, true, \ 2527 "use strict fp if modifier strictfp is set") \ 2528 \ 2529 develop(bool, GenerateSynchronizationCode, true, \ 2530 "generate locking/unlocking code for synchronized methods and " \ 2531 "monitors") \ 2532 \ 2533 develop(bool, GenerateCompilerNullChecks, true, \ 2534 "Generate explicit null checks for loads/stores/calls") \ 2535 \ 2536 develop(bool, GenerateRangeChecks, true, \ 2537 "Generate range checks for array accesses") \ 2538 \ 2539 develop_pd(bool, ImplicitNullChecks, \ 2540 "generate code for implicit null checks") \ 2541 \ 2542 product(bool, PrintSafepointStatistics, false, \ 2543 "print statistics about safepoint synchronization") \ 2544 \ 2545 product(intx, PrintSafepointStatisticsCount, 300, \ 2546 "total number of safepoint statistics collected " \ 2547 "before printing them out") \ 2548 \ 2549 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2550 "print safepoint statistics only when safepoint takes" \ 2551 " more than PrintSafepointSatisticsTimeout in millis") \ 2552 \ 2553 product(bool, TraceSafepointCleanupTime, false, \ 2554 "print the break down of clean up tasks performed during" \ 2555 " safepoint") \ 2556 \ 2557 develop(bool, InlineAccessors, true, \ 2558 "inline accessor methods (get/set)") \ 2559 \ 2560 product(bool, Inline, true, \ 2561 "enable inlining") \ 2562 \ 2563 product(bool, ClipInlining, true, \ 2564 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2565 \ 2566 develop(bool, UseCHA, true, \ 2567 "enable CHA") \ 2568 \ 2569 product(bool, UseTypeProfile, true, \ 2570 "Check interpreter profile for historically monomorphic calls") \ 2571 \ 2572 product(intx, TypeProfileMajorReceiverPercent, 90, \ 2573 "% of major receiver type to all profiled receivers") \ 2574 \ 2575 notproduct(bool, TimeCompiler, false, \ 2576 "time the compiler") \ 2577 \ 2578 notproduct(bool, TimeCompiler2, false, \ 2579 "detailed time the compiler (requires +TimeCompiler)") \ 2580 \ 2581 diagnostic(bool, PrintInlining, false, \ 2582 "prints inlining optimizations") \ 2583 \ 2584 diagnostic(bool, PrintIntrinsics, false, \ 2585 "prints attempted and successful inlining of intrinsics") \ 2586 \ 2587 product(bool, UseCountLeadingZerosInstruction, false, \ 2588 "Use count leading zeros instruction") \ 2589 \ 2590 product(bool, UsePopCountInstruction, false, \ 2591 "Use population count instruction") \ 2592 \ 2593 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2594 "do not expand intrinsics whose (internal) names appear here") \ 2595 \ 2596 develop(bool, StressReflectiveCode, false, \ 2597 "Use inexact types at allocations, etc., to test reflection") \ 2598 \ 2599 develop(bool, EagerInitialization, false, \ 2600 "Eagerly initialize classes if possible") \ 2601 \ 2602 develop(bool, TraceMethodReplacement, false, \ 2603 "Print when methods are replaced do to recompilation") \ 2604 \ 2605 develop(bool, PrintMethodFlushing, false, \ 2606 "print the nmethods being flushed") \ 2607 \ 2608 notproduct(bool, LogMultipleMutexLocking, false, \ 2609 "log locking and unlocking of mutexes (only if multiple locks " \ 2610 "are held)") \ 2611 \ 2612 develop(bool, UseRelocIndex, false, \ 2613 "use an index to speed random access to relocations") \ 2614 \ 2615 develop(bool, StressCodeBuffers, false, \ 2616 "Exercise code buffer expansion and other rare state changes") \ 2617 \ 2618 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2619 "Generate extra debugging info for non-safepoints in nmethods") \ 2620 \ 2621 diagnostic(bool, DebugInlinedCalls, true, \ 2622 "If false, restricts profiled locations to the root method only") \ 2623 \ 2624 product(bool, PrintVMOptions, false, \ 2625 "Print flags that appeared on the command line") \ 2626 \ 2627 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2628 "Ignore unrecognized VM options") \ 2629 \ 2630 product(bool, PrintCommandLineFlags, false, \ 2631 "Print flags specified on command line or set by ergonomics") \ 2632 \ 2633 product(bool, PrintFlagsInitial, false, \ 2634 "Print all VM flags before argument processing and exit VM") \ 2635 \ 2636 product(bool, PrintFlagsFinal, false, \ 2637 "Print all VM flags after argument and ergonomic processing") \ 2638 \ 2639 notproduct(bool, PrintFlagsWithComments, false, \ 2640 "Print all VM flags with default values and descriptions and exit")\ 2641 \ 2642 diagnostic(bool, SerializeVMOutput, true, \ 2643 "Use a mutex to serialize output to tty and hotspot.log") \ 2644 \ 2645 diagnostic(bool, DisplayVMOutput, true, \ 2646 "Display all VM output on the tty, independently of LogVMOutput") \ 2647 \ 2648 diagnostic(bool, LogVMOutput, trueInDebug, \ 2649 "Save VM output to hotspot.log, or to LogFile") \ 2650 \ 2651 diagnostic(ccstr, LogFile, NULL, \ 2652 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2653 \ 2654 product(ccstr, ErrorFile, NULL, \ 2655 "If an error occurs, save the error data to this file " \ 2656 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2657 \ 2658 product(bool, DisplayVMOutputToStderr, false, \ 2659 "If DisplayVMOutput is true, display all VM output to stderr") \ 2660 \ 2661 product(bool, DisplayVMOutputToStdout, false, \ 2662 "If DisplayVMOutput is true, display all VM output to stdout") \ 2663 \ 2664 product(bool, UseHeavyMonitors, false, \ 2665 "use heavyweight instead of lightweight Java monitors") \ 2666 \ 2667 product(bool, PrintStringTableStatistics, false, \ 2668 "print statistics about the StringTable and SymbolTable") \ 2669 \ 2670 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2671 "print histogram of the symbol table") \ 2672 \ 2673 notproduct(bool, ExitVMOnVerifyError, false, \ 2674 "standard exit from VM if bytecode verify error " \ 2675 "(only in debug mode)") \ 2676 \ 2677 notproduct(ccstr, AbortVMOnException, NULL, \ 2678 "Call fatal if this exception is thrown. Example: " \ 2679 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2680 \ 2681 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2682 "Call fatal if the exception pointed by AbortVMOnException " \ 2683 "has this message.") \ 2684 \ 2685 develop(bool, DebugVtables, false, \ 2686 "add debugging code to vtable dispatch") \ 2687 \ 2688 develop(bool, PrintVtables, false, \ 2689 "print vtables when printing klass") \ 2690 \ 2691 notproduct(bool, PrintVtableStats, false, \ 2692 "print vtables stats at end of run") \ 2693 \ 2694 develop(bool, TraceCreateZombies, false, \ 2695 "trace creation of zombie nmethods") \ 2696 \ 2697 notproduct(bool, IgnoreLockingAssertions, false, \ 2698 "disable locking assertions (for speed)") \ 2699 \ 2700 notproduct(bool, VerifyLoopOptimizations, false, \ 2701 "verify major loop optimizations") \ 2702 \ 2703 product(bool, RangeCheckElimination, true, \ 2704 "Split loop iterations to eliminate range checks") \ 2705 \ 2706 develop_pd(bool, UncommonNullCast, \ 2707 "track occurrences of null in casts; adjust compiler tactics") \ 2708 \ 2709 develop(bool, TypeProfileCasts, true, \ 2710 "treat casts like calls for purposes of type profiling") \ 2711 \ 2712 develop(bool, MonomorphicArrayCheck, true, \ 2713 "Uncommon-trap array store checks that require full type check") \ 2714 \ 2715 diagnostic(bool, ProfileDynamicTypes, true, \ 2716 "do extra type profiling and use it more aggressively") \ 2717 \ 2718 develop(bool, DelayCompilationDuringStartup, true, \ 2719 "Delay invoking the compiler until main application class is " \ 2720 "loaded") \ 2721 \ 2722 develop(bool, CompileTheWorld, false, \ 2723 "Compile all methods in all classes in bootstrap class path " \ 2724 "(stress test)") \ 2725 \ 2726 develop(bool, CompileTheWorldPreloadClasses, true, \ 2727 "Preload all classes used by a class before start loading") \ 2728 \ 2729 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2730 "Force a safepoint every n compiles so sweeper can keep up") \ 2731 \ 2732 develop(bool, TraceIterativeGVN, false, \ 2733 "Print progress during Iterative Global Value Numbering") \ 2734 \ 2735 develop(bool, FillDelaySlots, true, \ 2736 "Fill delay slots (on SPARC only)") \ 2737 \ 2738 develop(bool, VerifyIterativeGVN, false, \ 2739 "Verify Def-Use modifications during sparse Iterative Global " \ 2740 "Value Numbering") \ 2741 \ 2742 notproduct(bool, TracePhaseCCP, false, \ 2743 "Print progress during Conditional Constant Propagation") \ 2744 \ 2745 develop(bool, TimeLivenessAnalysis, false, \ 2746 "Time computation of bytecode liveness analysis") \ 2747 \ 2748 develop(bool, TraceLivenessGen, false, \ 2749 "Trace the generation of liveness analysis information") \ 2750 \ 2751 notproduct(bool, TraceLivenessQuery, false, \ 2752 "Trace queries of liveness analysis information") \ 2753 \ 2754 notproduct(bool, CollectIndexSetStatistics, false, \ 2755 "Collect information about IndexSets") \ 2756 \ 2757 develop(bool, PrintDominators, false, \ 2758 "Print out dominator trees for GVN") \ 2759 \ 2760 develop(bool, UseLoopSafepoints, true, \ 2761 "Generate Safepoint nodes in every loop") \ 2762 \ 2763 notproduct(bool, TraceCISCSpill, false, \ 2764 "Trace allocators use of cisc spillable instructions") \ 2765 \ 2766 notproduct(bool, TraceSpilling, false, \ 2767 "Trace spilling") \ 2768 \ 2769 product(bool, SplitIfBlocks, true, \ 2770 "Clone compares and control flow through merge points to fold " \ 2771 "some branches") \ 2772 \ 2773 develop(intx, FastAllocateSizeLimit, 128*K, \ 2774 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2775 "Inline allocations larger than this in doublewords must go slow")\ 2776 \ 2777 product(bool, AggressiveOpts, false, \ 2778 "Enable aggressive optimizations - see arguments.cpp") \ 2779 \ 2780 product(bool, UseStringCache, false, \ 2781 "Enable String cache capabilities on String.java") \ 2782 \ 2783 /* statistics */ \ 2784 develop(bool, CountCompiledCalls, false, \ 2785 "counts method invocations") \ 2786 \ 2787 notproduct(bool, CountRuntimeCalls, false, \ 2788 "counts VM runtime calls") \ 2789 \ 2790 develop(bool, CountJNICalls, false, \ 2791 "counts jni method invocations") \ 2792 \ 2793 notproduct(bool, CountJVMCalls, false, \ 2794 "counts jvm method invocations") \ 2795 \ 2796 notproduct(bool, CountRemovableExceptions, false, \ 2797 "count exceptions that could be replaced by branches due to " \ 2798 "inlining") \ 2799 \ 2800 notproduct(bool, ICMissHistogram, false, \ 2801 "produce histogram of IC misses") \ 2802 \ 2803 notproduct(bool, PrintClassStatistics, false, \ 2804 "prints class statistics at end of run") \ 2805 \ 2806 notproduct(bool, PrintMethodStatistics, false, \ 2807 "prints method statistics at end of run") \ 2808 \ 2809 /* interpreter */ \ 2810 develop(bool, ClearInterpreterLocals, false, \ 2811 "Always clear local variables of interpreter activations upon " \ 2812 "entry") \ 2813 \ 2814 product_pd(bool, RewriteBytecodes, \ 2815 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2816 \ 2817 product_pd(bool, RewriteFrequentPairs, \ 2818 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2819 \ 2820 diagnostic(bool, PrintInterpreter, false, \ 2821 "Prints the generated interpreter code") \ 2822 \ 2823 product(bool, UseInterpreter, true, \ 2824 "Use interpreter for non-compiled methods") \ 2825 \ 2826 develop(bool, UseFastSignatureHandlers, true, \ 2827 "Use fast signature handlers for native calls") \ 2828 \ 2829 develop(bool, UseV8InstrsOnly, false, \ 2830 "Use SPARC-V8 Compliant instruction subset") \ 2831 \ 2832 product(bool, UseNiagaraInstrs, false, \ 2833 "Use Niagara-efficient instruction subset") \ 2834 \ 2835 develop(bool, UseCASForSwap, false, \ 2836 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2837 \ 2838 product(bool, UseLoopCounter, true, \ 2839 "Increment invocation counter on backward branch") \ 2840 \ 2841 product(bool, UseFastEmptyMethods, true, \ 2842 "Use fast method entry code for empty methods") \ 2843 \ 2844 product(bool, UseFastAccessorMethods, true, \ 2845 "Use fast method entry code for accessor methods") \ 2846 \ 2847 product_pd(bool, UseOnStackReplacement, \ 2848 "Use on stack replacement, calls runtime if invoc. counter " \ 2849 "overflows in loop") \ 2850 \ 2851 notproduct(bool, TraceOnStackReplacement, false, \ 2852 "Trace on stack replacement") \ 2853 \ 2854 develop(bool, PoisonOSREntry, true, \ 2855 "Detect abnormal calls to OSR code") \ 2856 \ 2857 product_pd(bool, PreferInterpreterNativeStubs, \ 2858 "Use always interpreter stubs for native methods invoked via " \ 2859 "interpreter") \ 2860 \ 2861 develop(bool, CountBytecodes, false, \ 2862 "Count number of bytecodes executed") \ 2863 \ 2864 develop(bool, PrintBytecodeHistogram, false, \ 2865 "Print histogram of the executed bytecodes") \ 2866 \ 2867 develop(bool, PrintBytecodePairHistogram, false, \ 2868 "Print histogram of the executed bytecode pairs") \ 2869 \ 2870 diagnostic(bool, PrintSignatureHandlers, false, \ 2871 "Print code generated for native method signature handlers") \ 2872 \ 2873 develop(bool, VerifyOops, false, \ 2874 "Do plausibility checks for oops") \ 2875 \ 2876 develop(bool, CheckUnhandledOops, false, \ 2877 "Check for unhandled oops in VM code") \ 2878 \ 2879 develop(bool, VerifyJNIFields, trueInDebug, \ 2880 "Verify jfieldIDs for instance fields") \ 2881 \ 2882 notproduct(bool, VerifyJNIEnvThread, false, \ 2883 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2884 "from JNI") \ 2885 \ 2886 develop(bool, VerifyFPU, false, \ 2887 "Verify FPU state (check for NaN's, etc.)") \ 2888 \ 2889 develop(bool, VerifyThread, false, \ 2890 "Watch the thread register for corruption (SPARC only)") \ 2891 \ 2892 develop(bool, VerifyActivationFrameSize, false, \ 2893 "Verify that activation frame didn't become smaller than its " \ 2894 "minimal size") \ 2895 \ 2896 develop(bool, TraceFrequencyInlining, false, \ 2897 "Trace frequency based inlining") \ 2898 \ 2899 notproduct(bool, TraceTypeProfile, false, \ 2900 "Trace type profile") \ 2901 \ 2902 develop_pd(bool, InlineIntrinsics, \ 2903 "Inline intrinsics that can be statically resolved") \ 2904 \ 2905 product_pd(bool, ProfileInterpreter, \ 2906 "Profile at the bytecode level during interpretation") \ 2907 \ 2908 develop_pd(bool, ProfileTraps, \ 2909 "Profile deoptimization traps at the bytecode level") \ 2910 \ 2911 product(intx, ProfileMaturityPercentage, 20, \ 2912 "number of method invocations/branches (expressed as % of " \ 2913 "CompileThreshold) before using the method's profile") \ 2914 \ 2915 develop(bool, PrintMethodData, false, \ 2916 "Print the results of +ProfileInterpreter at end of run") \ 2917 \ 2918 develop(bool, VerifyDataPointer, trueInDebug, \ 2919 "Verify the method data pointer during interpreter profiling") \ 2920 \ 2921 develop(bool, VerifyCompiledCode, false, \ 2922 "Include miscellaneous runtime verifications in nmethod code; " \ 2923 "default off because it disturbs nmethod size heuristics") \ 2924 \ 2925 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2926 "Manually make GC thread crash then dump java stack trace; " \ 2927 "Test only") \ 2928 \ 2929 /* compilation */ \ 2930 product(bool, UseCompiler, true, \ 2931 "use compilation") \ 2932 \ 2933 develop(bool, TraceCompilationPolicy, false, \ 2934 "Trace compilation policy") \ 2935 \ 2936 develop(bool, TimeCompilationPolicy, false, \ 2937 "Time the compilation policy") \ 2938 \ 2939 product(bool, UseCounterDecay, true, \ 2940 "adjust recompilation counters") \ 2941 \ 2942 develop(intx, CounterHalfLifeTime, 30, \ 2943 "half-life time of invocation counters (in secs)") \ 2944 \ 2945 develop(intx, CounterDecayMinIntervalLength, 500, \ 2946 "Min. ms. between invocation of CounterDecay") \ 2947 \ 2948 product(bool, AlwaysCompileLoopMethods, false, \ 2949 "when using recompilation, never interpret methods " \ 2950 "containing loops") \ 2951 \ 2952 product(bool, DontCompileHugeMethods, true, \ 2953 "don't compile methods > HugeMethodLimit") \ 2954 \ 2955 /* Bytecode escape analysis estimation. */ \ 2956 product(bool, EstimateArgEscape, true, \ 2957 "Analyze bytecodes to estimate escape state of arguments") \ 2958 \ 2959 product(intx, BCEATraceLevel, 0, \ 2960 "How much tracing to do of bytecode escape analysis estimates") \ 2961 \ 2962 product(intx, MaxBCEAEstimateLevel, 5, \ 2963 "Maximum number of nested calls that are analyzed by BC EA.") \ 2964 \ 2965 product(intx, MaxBCEAEstimateSize, 150, \ 2966 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2967 \ 2968 product(intx, AllocatePrefetchStyle, 1, \ 2969 "0 = no prefetch, " \ 2970 "1 = prefetch instructions for each allocation, " \ 2971 "2 = use TLAB watermark to gate allocation prefetch, " \ 2972 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2973 \ 2974 product(intx, AllocatePrefetchDistance, -1, \ 2975 "Distance to prefetch ahead of allocation pointer") \ 2976 \ 2977 product(intx, AllocatePrefetchLines, 3, \ 2978 "Number of lines to prefetch ahead of array allocation pointer") \ 2979 \ 2980 product(intx, AllocateInstancePrefetchLines, 1, \ 2981 "Number of lines to prefetch ahead of instance allocation pointer") \ 2982 \ 2983 product(intx, AllocatePrefetchStepSize, 16, \ 2984 "Step size in bytes of sequential prefetch instructions") \ 2985 \ 2986 product(intx, AllocatePrefetchInstr, 0, \ 2987 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2988 \ 2989 product(intx, ReadPrefetchInstr, 0, \ 2990 "Prefetch instruction to prefetch ahead") \ 2991 \ 2992 product(uintx, ArraycopySrcPrefetchDistance, 0, \ 2993 "Distance to prefetch source array in arracopy") \ 2994 \ 2995 product(uintx, ArraycopyDstPrefetchDistance, 0, \ 2996 "Distance to prefetch destination array in arracopy") \ 2997 \ 2998 /* deoptimization */ \ 2999 develop(bool, TraceDeoptimization, false, \ 3000 "Trace deoptimization") \ 3001 \ 3002 develop(bool, DebugDeoptimization, false, \ 3003 "Tracing various information while debugging deoptimization") \ 3004 \ 3005 product(intx, SelfDestructTimer, 0, \ 3006 "Will cause VM to terminate after a given time (in minutes) " \ 3007 "(0 means off)") \ 3008 \ 3009 product(intx, MaxJavaStackTraceDepth, 1024, \ 3010 "Max. no. of lines in the stack trace for Java exceptions " \ 3011 "(0 means all)") \ 3012 \ 3013 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3014 "Guarantee a safepoint (at least) every so many milliseconds " \ 3015 "(0 means none)")) \ 3016 \ 3017 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3018 "Guarantee a safepoint (at least) every so many milliseconds " \ 3019 "(0 means none)")) \ 3020 \ 3021 product(intx, SafepointTimeoutDelay, 10000, \ 3022 "Delay in milliseconds for option SafepointTimeout") \ 3023 \ 3024 product(intx, NmethodSweepFraction, 16, \ 3025 "Number of invocations of sweeper to cover all nmethods") \ 3026 \ 3027 product(intx, NmethodSweepCheckInterval, 5, \ 3028 "Compilers wake up every n seconds to possibly sweep nmethods") \ 3029 \ 3030 notproduct(bool, LogSweeper, false, \ 3031 "Keep a ring buffer of sweeper activity") \ 3032 \ 3033 notproduct(intx, SweeperLogEntries, 1024, \ 3034 "Number of records in the ring buffer of sweeper activity") \ 3035 \ 3036 notproduct(intx, MemProfilingInterval, 500, \ 3037 "Time between each invocation of the MemProfiler") \ 3038 \ 3039 develop(intx, MallocCatchPtr, -1, \ 3040 "Hit breakpoint when mallocing/freeing this pointer") \ 3041 \ 3042 notproduct(intx, AssertRepeat, 1, \ 3043 "number of times to evaluate expression in assert " \ 3044 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 3045 \ 3046 notproduct(ccstrlist, SuppressErrorAt, "", \ 3047 "List of assertions (file:line) to muzzle") \ 3048 \ 3049 notproduct(uintx, HandleAllocationLimit, 1024, \ 3050 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3051 "is used") \ 3052 \ 3053 develop(uintx, TotalHandleAllocationLimit, 1024, \ 3054 "Threshold for total handle allocation when " \ 3055 "+TraceHandleAllocation is used") \ 3056 \ 3057 develop(intx, StackPrintLimit, 100, \ 3058 "number of stack frames to print in VM-level stack dump") \ 3059 \ 3060 notproduct(intx, MaxElementPrintSize, 256, \ 3061 "maximum number of elements to print") \ 3062 \ 3063 notproduct(intx, MaxSubklassPrintSize, 4, \ 3064 "maximum number of subklasses to print when printing klass") \ 3065 \ 3066 product(intx, MaxInlineLevel, 9, \ 3067 "maximum number of nested calls that are inlined") \ 3068 \ 3069 product(intx, MaxRecursiveInlineLevel, 1, \ 3070 "maximum number of nested recursive calls that are inlined") \ 3071 \ 3072 product_pd(intx, InlineSmallCode, \ 3073 "Only inline already compiled methods if their code size is " \ 3074 "less than this") \ 3075 \ 3076 product(intx, MaxInlineSize, 35, \ 3077 "maximum bytecode size of a method to be inlined") \ 3078 \ 3079 product_pd(intx, FreqInlineSize, \ 3080 "maximum bytecode size of a frequent method to be inlined") \ 3081 \ 3082 product(intx, MaxTrivialSize, 6, \ 3083 "maximum bytecode size of a trivial method to be inlined") \ 3084 \ 3085 product(intx, MinInliningThreshold, 250, \ 3086 "min. invocation count a method needs to have to be inlined") \ 3087 \ 3088 develop(intx, AlignEntryCode, 4, \ 3089 "aligns entry code to specified value (in bytes)") \ 3090 \ 3091 develop(intx, MethodHistogramCutoff, 100, \ 3092 "cutoff value for method invoc. histogram (+CountCalls)") \ 3093 \ 3094 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3095 "# of interpreted methods to show in profile") \ 3096 \ 3097 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3098 "# of compiled methods to show in profile") \ 3099 \ 3100 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3101 "# of stub methods to show in profile") \ 3102 \ 3103 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3104 "# of runtime stub nodes to show in profile") \ 3105 \ 3106 product(intx, ProfileIntervalsTicks, 100, \ 3107 "# of ticks between printing of interval profile " \ 3108 "(+ProfileIntervals)") \ 3109 \ 3110 notproduct(intx, ScavengeALotInterval, 1, \ 3111 "Interval between which scavenge will occur with +ScavengeALot") \ 3112 \ 3113 notproduct(intx, FullGCALotInterval, 1, \ 3114 "Interval between which full gc will occur with +FullGCALot") \ 3115 \ 3116 notproduct(intx, FullGCALotStart, 0, \ 3117 "For which invocation to start FullGCAlot") \ 3118 \ 3119 notproduct(intx, FullGCALotDummies, 32*K, \ 3120 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3121 "to move") \ 3122 \ 3123 develop(intx, DontYieldALotInterval, 10, \ 3124 "Interval between which yields will be dropped (milliseconds)") \ 3125 \ 3126 develop(intx, MinSleepInterval, 1, \ 3127 "Minimum sleep() interval (milliseconds) when " \ 3128 "ConvertSleepToYield is off (used for SOLARIS)") \ 3129 \ 3130 product(intx, EventLogLength, 2000, \ 3131 "maximum nof events in event log") \ 3132 \ 3133 develop(intx, ProfilerPCTickThreshold, 15, \ 3134 "Number of ticks in a PC buckets to be a hotspot") \ 3135 \ 3136 notproduct(intx, DeoptimizeALotInterval, 5, \ 3137 "Number of exits until DeoptimizeALot kicks in") \ 3138 \ 3139 notproduct(intx, ZombieALotInterval, 5, \ 3140 "Number of exits until ZombieALot kicks in") \ 3141 \ 3142 develop(bool, StressNonEntrant, false, \ 3143 "Mark nmethods non-entrant at registration") \ 3144 \ 3145 diagnostic(intx, MallocVerifyInterval, 0, \ 3146 "if non-zero, verify C heap after every N calls to " \ 3147 "malloc/realloc/free") \ 3148 \ 3149 diagnostic(intx, MallocVerifyStart, 0, \ 3150 "if non-zero, start verifying C heap after Nth call to " \ 3151 "malloc/realloc/free") \ 3152 \ 3153 product(intx, TypeProfileWidth, 2, \ 3154 "number of receiver types to record in call/cast profile") \ 3155 \ 3156 develop(intx, BciProfileWidth, 2, \ 3157 "number of return bci's to record in ret profile") \ 3158 \ 3159 product(intx, PerMethodRecompilationCutoff, 400, \ 3160 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3161 \ 3162 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3163 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3164 \ 3165 product(intx, PerMethodTrapLimit, 100, \ 3166 "Limit on traps (of one kind) in a method (includes inlines)") \ 3167 \ 3168 product(intx, PerBytecodeTrapLimit, 4, \ 3169 "Limit on traps (of one kind) at a particular BCI") \ 3170 \ 3171 develop(intx, FreqCountInvocations, 1, \ 3172 "Scaling factor for branch frequencies (deprecated)") \ 3173 \ 3174 develop(intx, InlineFrequencyRatio, 20, \ 3175 "Ratio of call site execution to caller method invocation") \ 3176 \ 3177 develop_pd(intx, InlineFrequencyCount, \ 3178 "Count of call site execution necessary to trigger frequent " \ 3179 "inlining") \ 3180 \ 3181 develop(intx, InlineThrowCount, 50, \ 3182 "Force inlining of interpreted methods that throw this often") \ 3183 \ 3184 develop(intx, InlineThrowMaxSize, 200, \ 3185 "Force inlining of throwing methods smaller than this") \ 3186 \ 3187 product(intx, AliasLevel, 3, \ 3188 "0 for no aliasing, 1 for oop/field/static/array split, " \ 3189 "2 for class split, 3 for unique instances") \ 3190 \ 3191 develop(bool, VerifyAliases, false, \ 3192 "perform extra checks on the results of alias analysis") \ 3193 \ 3194 develop(intx, ProfilerNodeSize, 1024, \ 3195 "Size in K to allocate for the Profile Nodes of each thread") \ 3196 \ 3197 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 3198 "Number of times to spin wait on a v8 atomic operation lock") \ 3199 \ 3200 product(intx, ReadSpinIterations, 100, \ 3201 "Number of read attempts before a yield (spin inner loop)") \ 3202 \ 3203 product_pd(intx, PreInflateSpin, \ 3204 "Number of times to spin wait before inflation") \ 3205 \ 3206 product(intx, PreBlockSpin, 10, \ 3207 "Number of times to spin in an inflated lock before going to " \ 3208 "an OS lock") \ 3209 \ 3210 /* gc parameters */ \ 3211 product(uintx, InitialHeapSize, 0, \ 3212 "Initial heap size (in bytes); zero means OldSize + NewSize") \ 3213 \ 3214 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 3215 "Maximum heap size (in bytes)") \ 3216 \ 3217 product(uintx, OldSize, ScaleForWordSize(4*M), \ 3218 "Initial tenured generation size (in bytes)") \ 3219 \ 3220 product(uintx, NewSize, ScaleForWordSize(1*M), \ 3221 "Initial new generation size (in bytes)") \ 3222 \ 3223 product(uintx, MaxNewSize, max_uintx, \ 3224 "Maximum new generation size (in bytes), max_uintx means set " \ 3225 "ergonomically") \ 3226 \ 3227 product(uintx, PretenureSizeThreshold, 0, \ 3228 "Maximum size in bytes of objects allocated in DefNew " \ 3229 "generation; zero means no maximum") \ 3230 \ 3231 product(uintx, TLABSize, 0, \ 3232 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3233 \ 3234 product(uintx, MinTLABSize, 2*K, \ 3235 "Minimum allowed TLAB size (in bytes)") \ 3236 \ 3237 product(uintx, TLABAllocationWeight, 35, \ 3238 "Allocation averaging weight") \ 3239 \ 3240 product(uintx, TLABWasteTargetPercent, 1, \ 3241 "Percentage of Eden that can be wasted") \ 3242 \ 3243 product(uintx, TLABRefillWasteFraction, 64, \ 3244 "Max TLAB waste at a refill (internal fragmentation)") \ 3245 \ 3246 product(uintx, TLABWasteIncrement, 4, \ 3247 "Increment allowed waste at slow allocation") \ 3248 \ 3249 product(intx, SurvivorRatio, 8, \ 3250 "Ratio of eden/survivor space size") \ 3251 \ 3252 product(intx, NewRatio, 2, \ 3253 "Ratio of new/old generation sizes") \ 3254 \ 3255 product_pd(uintx, NewSizeThreadIncrease, \ 3256 "Additional size added to desired new generation size per " \ 3257 "non-daemon thread (in bytes)") \ 3258 \ 3259 product_pd(uintx, PermSize, \ 3260 "Initial size of permanent generation (in bytes)") \ 3261 \ 3262 product_pd(uintx, MaxPermSize, \ 3263 "Maximum size of permanent generation (in bytes)") \ 3264 \ 3265 product(uintx, MinHeapFreeRatio, 40, \ 3266 "Min percentage of heap free after GC to avoid expansion") \ 3267 \ 3268 product(uintx, MaxHeapFreeRatio, 70, \ 3269 "Max percentage of heap free after GC to avoid shrinking") \ 3270 \ 3271 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3272 "Number of milliseconds per MB of free space in the heap") \ 3273 \ 3274 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3275 "Min change in heap space due to GC (in bytes)") \ 3276 \ 3277 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 3278 "Min expansion of permanent heap (in bytes)") \ 3279 \ 3280 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 3281 "Max expansion of permanent heap without full GC (in bytes)") \ 3282 \ 3283 product(intx, QueuedAllocationWarningCount, 0, \ 3284 "Number of times an allocation that queues behind a GC " \ 3285 "will retry before printing a warning") \ 3286 \ 3287 diagnostic(uintx, VerifyGCStartAt, 0, \ 3288 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3289 \ 3290 diagnostic(intx, VerifyGCLevel, 0, \ 3291 "Generation level at which to start +VerifyBefore/AfterGC") \ 3292 \ 3293 product(intx, MaxTenuringThreshold, 15, \ 3294 "Maximum value for tenuring threshold") \ 3295 \ 3296 product(intx, InitialTenuringThreshold, 7, \ 3297 "Initial value for tenuring threshold") \ 3298 \ 3299 product(intx, TargetSurvivorRatio, 50, \ 3300 "Desired percentage of survivor space used after scavenge") \ 3301 \ 3302 product(uintx, MarkSweepDeadRatio, 5, \ 3303 "Percentage (0-100) of the old gen allowed as dead wood." \ 3304 "Serial mark sweep treats this as both the min and max value." \ 3305 "CMS uses this value only if it falls back to mark sweep." \ 3306 "Par compact uses a variable scale based on the density of the" \ 3307 "generation and treats this as the max value when the heap is" \ 3308 "either completely full or completely empty. Par compact also" \ 3309 "has a smaller default value; see arguments.cpp.") \ 3310 \ 3311 product(uintx, PermMarkSweepDeadRatio, 20, \ 3312 "Percentage (0-100) of the perm gen allowed as dead wood." \ 3313 "See MarkSweepDeadRatio for collector-specific comments.") \ 3314 \ 3315 product(intx, MarkSweepAlwaysCompactCount, 4, \ 3316 "How often should we fully compact the heap (ignoring the dead " \ 3317 "space parameters)") \ 3318 \ 3319 product(intx, PrintCMSStatistics, 0, \ 3320 "Statistics for CMS") \ 3321 \ 3322 product(bool, PrintCMSInitiationStatistics, false, \ 3323 "Statistics for initiating a CMS collection") \ 3324 \ 3325 product(intx, PrintFLSStatistics, 0, \ 3326 "Statistics for CMS' FreeListSpace") \ 3327 \ 3328 product(intx, PrintFLSCensus, 0, \ 3329 "Census for CMS' FreeListSpace") \ 3330 \ 3331 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3332 "Delay in ms between expansion and allocation") \ 3333 \ 3334 product(intx, DeferThrSuspendLoopCount, 4000, \ 3335 "(Unstable) Number of times to iterate in safepoint loop " \ 3336 " before blocking VM threads ") \ 3337 \ 3338 product(intx, DeferPollingPageLoopCount, -1, \ 3339 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3340 "before changing safepoint polling page to RO ") \ 3341 \ 3342 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3343 \ 3344 product(bool, PSChunkLargeArrays, true, \ 3345 "true: process large arrays in chunks") \ 3346 \ 3347 product(uintx, GCDrainStackTargetSize, 64, \ 3348 "how many entries we'll try to leave on the stack during " \ 3349 "parallel GC") \ 3350 \ 3351 /* stack parameters */ \ 3352 product_pd(intx, StackYellowPages, \ 3353 "Number of yellow zone (recoverable overflows) pages") \ 3354 \ 3355 product_pd(intx, StackRedPages, \ 3356 "Number of red zone (unrecoverable overflows) pages") \ 3357 \ 3358 product_pd(intx, StackShadowPages, \ 3359 "Number of shadow zone (for overflow checking) pages" \ 3360 " this should exceed the depth of the VM and native call stack") \ 3361 \ 3362 product_pd(intx, ThreadStackSize, \ 3363 "Thread Stack Size (in Kbytes)") \ 3364 \ 3365 product_pd(intx, VMThreadStackSize, \ 3366 "Non-Java Thread Stack Size (in Kbytes)") \ 3367 \ 3368 product_pd(intx, CompilerThreadStackSize, \ 3369 "Compiler Thread Stack Size (in Kbytes)") \ 3370 \ 3371 develop_pd(uintx, JVMInvokeMethodSlack, \ 3372 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3373 \ 3374 product(uintx, ThreadSafetyMargin, 50*M, \ 3375 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3376 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3377 "disable this feature") \ 3378 \ 3379 /* code cache parameters */ \ 3380 develop(uintx, CodeCacheSegmentSize, 64, \ 3381 "Code cache segment size (in bytes) - smallest unit of " \ 3382 "allocation") \ 3383 \ 3384 develop_pd(intx, CodeEntryAlignment, \ 3385 "Code entry alignment for generated code (in bytes)") \ 3386 \ 3387 product_pd(intx, OptoLoopAlignment, \ 3388 "Align inner loops to zero relative to this modulus") \ 3389 \ 3390 product_pd(uintx, InitialCodeCacheSize, \ 3391 "Initial code cache size (in bytes)") \ 3392 \ 3393 product_pd(uintx, ReservedCodeCacheSize, \ 3394 "Reserved code cache size (in bytes) - maximum code cache size") \ 3395 \ 3396 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3397 "When less than X space left, we stop compiling.") \ 3398 \ 3399 product_pd(uintx, CodeCacheExpansionSize, \ 3400 "Code cache expansion size (in bytes)") \ 3401 \ 3402 develop_pd(uintx, CodeCacheMinBlockLength, \ 3403 "Minimum number of segments in a code cache block.") \ 3404 \ 3405 notproduct(bool, ExitOnFullCodeCache, false, \ 3406 "Exit the VM if we fill the code cache.") \ 3407 \ 3408 product(bool, UseCodeCacheFlushing, true, \ 3409 "Attempt to clean the code cache before shutting off compiler") \ 3410 \ 3411 product(intx, MinCodeCacheFlushingInterval, 30, \ 3412 "Min number of seconds between code cache cleaning sessions") \ 3413 \ 3414 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3415 "When less than X space left, start code cache cleaning") \ 3416 \ 3417 /* interpreter debugging */ \ 3418 develop(intx, BinarySwitchThreshold, 5, \ 3419 "Minimal number of lookupswitch entries for rewriting to binary " \ 3420 "switch") \ 3421 \ 3422 develop(intx, StopInterpreterAt, 0, \ 3423 "Stops interpreter execution at specified bytecode number") \ 3424 \ 3425 develop(intx, TraceBytecodesAt, 0, \ 3426 "Traces bytecodes starting with specified bytecode number") \ 3427 \ 3428 /* compiler interface */ \ 3429 develop(intx, CIStart, 0, \ 3430 "the id of the first compilation to permit") \ 3431 \ 3432 develop(intx, CIStop, -1, \ 3433 "the id of the last compilation to permit") \ 3434 \ 3435 develop(intx, CIStartOSR, 0, \ 3436 "the id of the first osr compilation to permit " \ 3437 "(CICountOSR must be on)") \ 3438 \ 3439 develop(intx, CIStopOSR, -1, \ 3440 "the id of the last osr compilation to permit " \ 3441 "(CICountOSR must be on)") \ 3442 \ 3443 develop(intx, CIBreakAtOSR, -1, \ 3444 "id of osr compilation to break at") \ 3445 \ 3446 develop(intx, CIBreakAt, -1, \ 3447 "id of compilation to break at") \ 3448 \ 3449 product(ccstrlist, CompileOnly, "", \ 3450 "List of methods (pkg/class.name) to restrict compilation to") \ 3451 \ 3452 product(ccstr, CompileCommandFile, NULL, \ 3453 "Read compiler commands from this file [.hotspot_compiler]") \ 3454 \ 3455 product(ccstrlist, CompileCommand, "", \ 3456 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3457 \ 3458 product(bool, CICompilerCountPerCPU, false, \ 3459 "1 compiler thread for log(N CPUs)") \ 3460 \ 3461 develop(intx, CIFireOOMAt, -1, \ 3462 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3463 "(non-negative value throws OOM after this many CI accesses " \ 3464 "in each compile)") \ 3465 \ 3466 develop(intx, CIFireOOMAtDelay, -1, \ 3467 "Wait for this many CI accesses to occur in all compiles before " \ 3468 "beginning to throw OutOfMemoryErrors in each compile") \ 3469 \ 3470 notproduct(bool, CIObjectFactoryVerify, false, \ 3471 "enable potentially expensive verification in ciObjectFactory") \ 3472 \ 3473 /* Priorities */ \ 3474 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3475 \ 3476 product(intx, ThreadPriorityPolicy, 0, \ 3477 "0 : Normal. "\ 3478 " VM chooses priorities that are appropriate for normal "\ 3479 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3480 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3481 " map to lower native priority values. On Windows applications"\ 3482 " are allowed to use higher native priorities. However, with "\ 3483 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3484 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3485 " interfere with system threads. On Linux thread priorities "\ 3486 " are ignored because the OS does not support static priority "\ 3487 " in SCHED_OTHER scheduling class which is the only choice for"\ 3488 " non-root, non-realtime applications. "\ 3489 "1 : Aggressive. "\ 3490 " Java thread priorities map over to the entire range of "\ 3491 " native thread priorities. Higher Java thread priorities map "\ 3492 " to higher native thread priorities. This policy should be "\ 3493 " used with care, as sometimes it can cause performance "\ 3494 " degradation in the application and/or the entire system. On "\ 3495 " Linux this policy requires root privilege.") \ 3496 \ 3497 product(bool, ThreadPriorityVerbose, false, \ 3498 "Print priority changes") \ 3499 \ 3500 product(intx, DefaultThreadPriority, -1, \ 3501 "The native priority at which threads run if not elsewhere " \ 3502 "specified (-1 means no change)") \ 3503 \ 3504 product(intx, CompilerThreadPriority, -1, \ 3505 "The native priority at which compiler threads should run " \ 3506 "(-1 means no change)") \ 3507 \ 3508 product(intx, VMThreadPriority, -1, \ 3509 "The native priority at which the VM thread should run " \ 3510 "(-1 means no change)") \ 3511 \ 3512 product(bool, CompilerThreadHintNoPreempt, true, \ 3513 "(Solaris only) Give compiler threads an extra quanta") \ 3514 \ 3515 product(bool, VMThreadHintNoPreempt, false, \ 3516 "(Solaris only) Give VM thread an extra quanta") \ 3517 \ 3518 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3519 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3520 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3521 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3522 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3523 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3524 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3525 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3526 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3527 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3528 \ 3529 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3530 "Java thread priority 10 maps to critical scheduling priority") \ 3531 \ 3532 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3533 "Compiler thread(s) run at critical scheduling priority") \ 3534 \ 3535 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3536 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3537 \ 3538 /* compiler debugging */ \ 3539 notproduct(intx, CompileTheWorldStartAt, 1, \ 3540 "First class to consider when using +CompileTheWorld") \ 3541 \ 3542 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3543 "Last class to consider when using +CompileTheWorld") \ 3544 \ 3545 develop(intx, NewCodeParameter, 0, \ 3546 "Testing Only: Create a dedicated integer parameter before " \ 3547 "putback") \ 3548 \ 3549 /* new oopmap storage allocation */ \ 3550 develop(intx, MinOopMapAllocation, 8, \ 3551 "Minimum number of OopMap entries in an OopMapSet") \ 3552 \ 3553 /* Background Compilation */ \ 3554 develop(intx, LongCompileThreshold, 50, \ 3555 "Used with +TraceLongCompiles") \ 3556 \ 3557 product(intx, StarvationMonitorInterval, 200, \ 3558 "Pause between each check in ms") \ 3559 \ 3560 /* recompilation */ \ 3561 product_pd(intx, CompileThreshold, \ 3562 "number of interpreted method invocations before (re-)compiling") \ 3563 \ 3564 product_pd(intx, BackEdgeThreshold, \ 3565 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3566 \ 3567 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3568 "Interpreter (tier 0) invocation notification frequency.") \ 3569 \ 3570 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3571 "C1 without MDO (tier 2) invocation notification frequency.") \ 3572 \ 3573 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3574 "C1 with MDO profiling (tier 3) invocation notification " \ 3575 "frequency.") \ 3576 \ 3577 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3578 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3579 \ 3580 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3581 "Interpreter (tier 0) invocation notification frequency.") \ 3582 \ 3583 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3584 "C1 without MDO (tier 2) invocation notification frequency.") \ 3585 \ 3586 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3587 "C1 with MDO profiling (tier 3) invocation notification " \ 3588 "frequency.") \ 3589 \ 3590 product(intx, Tier2CompileThreshold, 0, \ 3591 "threshold at which tier 2 compilation is invoked") \ 3592 \ 3593 product(intx, Tier2BackEdgeThreshold, 0, \ 3594 "Back edge threshold at which tier 2 compilation is invoked") \ 3595 \ 3596 product(intx, Tier3InvocationThreshold, 200, \ 3597 "Compile if number of method invocations crosses this " \ 3598 "threshold") \ 3599 \ 3600 product(intx, Tier3MinInvocationThreshold, 100, \ 3601 "Minimum invocation to compile at tier 3") \ 3602 \ 3603 product(intx, Tier3CompileThreshold, 2000, \ 3604 "Threshold at which tier 3 compilation is invoked (invocation " \ 3605 "minimum must be satisfied.") \ 3606 \ 3607 product(intx, Tier3BackEdgeThreshold, 60000, \ 3608 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3609 \ 3610 product(intx, Tier4InvocationThreshold, 5000, \ 3611 "Compile if number of method invocations crosses this " \ 3612 "threshold") \ 3613 \ 3614 product(intx, Tier4MinInvocationThreshold, 600, \ 3615 "Minimum invocation to compile at tier 4") \ 3616 \ 3617 product(intx, Tier4CompileThreshold, 15000, \ 3618 "Threshold at which tier 4 compilation is invoked (invocation " \ 3619 "minimum must be satisfied.") \ 3620 \ 3621 product(intx, Tier4BackEdgeThreshold, 40000, \ 3622 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3623 \ 3624 product(intx, Tier3DelayOn, 5, \ 3625 "If C2 queue size grows over this amount per compiler thread " \ 3626 "stop compiling at tier 3 and start compiling at tier 2") \ 3627 \ 3628 product(intx, Tier3DelayOff, 2, \ 3629 "If C2 queue size is less than this amount per compiler thread " \ 3630 "allow methods compiled at tier 2 transition to tier 3") \ 3631 \ 3632 product(intx, Tier3LoadFeedback, 5, \ 3633 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3634 "reaches this amount per compiler thread") \ 3635 \ 3636 product(intx, Tier4LoadFeedback, 3, \ 3637 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3638 "reaches this amount per compiler thread") \ 3639 \ 3640 product(intx, TieredCompileTaskTimeout, 50, \ 3641 "Kill compile task if method was not used within " \ 3642 "given timeout in milliseconds") \ 3643 \ 3644 product(intx, TieredStopAtLevel, 4, \ 3645 "Stop at given compilation level") \ 3646 \ 3647 product(intx, Tier0ProfilingStartPercentage, 200, \ 3648 "Start profiling in interpreter if the counters exceed tier 3" \ 3649 "thresholds by the specified percentage") \ 3650 \ 3651 product(intx, TieredRateUpdateMinTime, 1, \ 3652 "Minimum rate sampling interval (in milliseconds)") \ 3653 \ 3654 product(intx, TieredRateUpdateMaxTime, 25, \ 3655 "Maximum rate sampling interval (in milliseconds)") \ 3656 \ 3657 product_pd(bool, TieredCompilation, \ 3658 "Enable tiered compilation") \ 3659 \ 3660 product(bool, PrintTieredEvents, false, \ 3661 "Print tiered events notifications") \ 3662 \ 3663 product(bool, StressTieredRuntime, false, \ 3664 "Alternate client and server compiler on compile requests") \ 3665 \ 3666 product_pd(intx, OnStackReplacePercentage, \ 3667 "NON_TIERED number of method invocations/branches (expressed as %"\ 3668 "of CompileThreshold) before (re-)compiling OSR code") \ 3669 \ 3670 product(intx, InterpreterProfilePercentage, 33, \ 3671 "NON_TIERED number of method invocations/branches (expressed as %"\ 3672 "of CompileThreshold) before profiling in the interpreter") \ 3673 \ 3674 develop(intx, MaxRecompilationSearchLength, 10, \ 3675 "max. # frames to inspect searching for recompilee") \ 3676 \ 3677 develop(intx, MaxInterpretedSearchLength, 3, \ 3678 "max. # interp. frames to skip when searching for recompilee") \ 3679 \ 3680 develop(intx, DesiredMethodLimit, 8000, \ 3681 "desired max. method size (in bytecodes) after inlining") \ 3682 \ 3683 develop(intx, HugeMethodLimit, 8000, \ 3684 "don't compile methods larger than this if " \ 3685 "+DontCompileHugeMethods") \ 3686 \ 3687 /* New JDK 1.4 reflection implementation */ \ 3688 \ 3689 develop(bool, UseNewReflection, true, \ 3690 "Temporary flag for transition to reflection based on dynamic " \ 3691 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3692 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3693 "changes were needed") \ 3694 \ 3695 develop(bool, VerifyReflectionBytecodes, false, \ 3696 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3697 "in situations like that described in 4486457 or for " \ 3698 "constructors generated for serialization, so can not be enabled "\ 3699 "in product.") \ 3700 \ 3701 product(bool, ReflectionWrapResolutionErrors, true, \ 3702 "Temporary flag for transition to AbstractMethodError wrapped " \ 3703 "in InvocationTargetException. See 6531596") \ 3704 \ 3705 \ 3706 develop(intx, FastSuperclassLimit, 8, \ 3707 "Depth of hardwired instanceof accelerator array") \ 3708 \ 3709 /* Properties for Java libraries */ \ 3710 \ 3711 product(uintx, MaxDirectMemorySize, 0, \ 3712 "Maximum total size of NIO direct-buffer allocations") \ 3713 \ 3714 /* temporary developer defined flags */ \ 3715 \ 3716 diagnostic(bool, UseNewCode, false, \ 3717 "Testing Only: Use the new version while testing") \ 3718 \ 3719 diagnostic(bool, UseNewCode2, false, \ 3720 "Testing Only: Use the new version while testing") \ 3721 \ 3722 diagnostic(bool, UseNewCode3, false, \ 3723 "Testing Only: Use the new version while testing") \ 3724 \ 3725 /* flags for performance data collection */ \ 3726 \ 3727 product(bool, UsePerfData, falseInEmbedded, \ 3728 "Flag to disable jvmstat instrumentation for performance testing" \ 3729 "and problem isolation purposes.") \ 3730 \ 3731 product(bool, PerfDataSaveToFile, false, \ 3732 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3733 \ 3734 product(ccstr, PerfDataSaveFile, NULL, \ 3735 "Save PerfData memory to the specified absolute pathname," \ 3736 "%p in the file name if present will be replaced by pid") \ 3737 \ 3738 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3739 "Data sampling interval in milliseconds") \ 3740 \ 3741 develop(bool, PerfTraceDataCreation, false, \ 3742 "Trace creation of Performance Data Entries") \ 3743 \ 3744 develop(bool, PerfTraceMemOps, false, \ 3745 "Trace PerfMemory create/attach/detach calls") \ 3746 \ 3747 product(bool, PerfDisableSharedMem, false, \ 3748 "Store performance data in standard memory") \ 3749 \ 3750 product(intx, PerfDataMemorySize, 32*K, \ 3751 "Size of performance data memory region. Will be rounded " \ 3752 "up to a multiple of the native os page size.") \ 3753 \ 3754 product(intx, PerfMaxStringConstLength, 1024, \ 3755 "Maximum PerfStringConstant string length before truncation") \ 3756 \ 3757 product(bool, PerfAllowAtExitRegistration, false, \ 3758 "Allow registration of atexit() methods") \ 3759 \ 3760 product(bool, PerfBypassFileSystemCheck, false, \ 3761 "Bypass Win32 file system criteria checks (Windows Only)") \ 3762 \ 3763 product(intx, UnguardOnExecutionViolation, 0, \ 3764 "Unguard page and retry on no-execute fault (Win32 only)" \ 3765 "0=off, 1=conservative, 2=aggressive") \ 3766 \ 3767 /* Serviceability Support */ \ 3768 \ 3769 product(bool, ManagementServer, false, \ 3770 "Create JMX Management Server") \ 3771 \ 3772 product(bool, DisableAttachMechanism, false, \ 3773 "Disable mechanism that allows tools to attach to this VM") \ 3774 \ 3775 product(bool, StartAttachListener, false, \ 3776 "Always start Attach Listener at VM startup") \ 3777 \ 3778 manageable(bool, PrintConcurrentLocks, false, \ 3779 "Print java.util.concurrent locks in thread dump") \ 3780 \ 3781 product(bool, TransmitErrorReport, false, \ 3782 "Enable error report transmission on erroneous termination") \ 3783 \ 3784 product(ccstr, ErrorReportServer, NULL, \ 3785 "Override built-in error report server address") \ 3786 \ 3787 /* Shared spaces */ \ 3788 \ 3789 product(bool, UseSharedSpaces, true, \ 3790 "Use shared spaces in the permanent generation") \ 3791 \ 3792 product(bool, RequireSharedSpaces, false, \ 3793 "Require shared spaces in the permanent generation") \ 3794 \ 3795 product(bool, DumpSharedSpaces, false, \ 3796 "Special mode: JVM reads a class list, loads classes, builds " \ 3797 "shared spaces, and dumps the shared spaces to a file to be " \ 3798 "used in future JVM runs.") \ 3799 \ 3800 product(bool, PrintSharedSpaces, false, \ 3801 "Print usage of shared spaces") \ 3802 \ 3803 product(uintx, SharedDummyBlockSize, 512*M, \ 3804 "Size of dummy block used to shift heap addresses (in bytes)") \ 3805 \ 3806 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(13*M), \ 3807 "Size of read-write space in permanent generation (in bytes)") \ 3808 \ 3809 product(uintx, SharedReadOnlySize, 10*M, \ 3810 "Size of read-only space in permanent generation (in bytes)") \ 3811 \ 3812 product(uintx, SharedMiscDataSize, NOT_LP64(4*M) LP64_ONLY(5*M) NOT_PRODUCT(+1*M), \ 3813 "Size of the shared data area adjacent to the heap (in bytes)") \ 3814 \ 3815 product(uintx, SharedMiscCodeSize, 4*M, \ 3816 "Size of the shared code area adjacent to the heap (in bytes)") \ 3817 \ 3818 diagnostic(bool, SharedOptimizeColdStart, true, \ 3819 "At dump time, order shared objects to achieve better " \ 3820 "cold startup time.") \ 3821 \ 3822 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3823 "Reordering policy for SharedOptimizeColdStart " \ 3824 "0=favor classload-time locality, 1=balanced, " \ 3825 "2=favor runtime locality") \ 3826 \ 3827 diagnostic(bool, SharedSkipVerify, false, \ 3828 "Skip assert() and verify() which page-in unwanted shared " \ 3829 "objects. ") \ 3830 \ 3831 diagnostic(bool, EnableInvokeDynamic, true, \ 3832 "support JSR 292 (method handles, invokedynamic, " \ 3833 "anonymous classes") \ 3834 \ 3835 product(bool, AnonymousClasses, false, \ 3836 "support sun.misc.Unsafe.defineAnonymousClass (deprecated)") \ 3837 \ 3838 diagnostic(bool, PrintMethodHandleStubs, false, \ 3839 "Print generated stub code for method handles") \ 3840 \ 3841 develop(bool, TraceMethodHandles, false, \ 3842 "trace internal method handle operations") \ 3843 \ 3844 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3845 "perform extra checks when constructing method handles") \ 3846 \ 3847 diagnostic(bool, ShowHiddenFrames, false, \ 3848 "show method handle implementation frames (usually hidden)") \ 3849 \ 3850 experimental(bool, TrustFinalNonStaticFields, false, \ 3851 "trust final non-static declarations for constant folding") \ 3852 \ 3853 develop(bool, TraceInvokeDynamic, false, \ 3854 "trace internal invoke dynamic operations") \ 3855 \ 3856 diagnostic(bool, PauseAtStartup, false, \ 3857 "Causes the VM to pause at startup time and wait for the pause " \ 3858 "file to be removed (default: ./vm.paused.<pid>)") \ 3859 \ 3860 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3861 "The file to create and for whose removal to await when pausing " \ 3862 "at startup. (default: ./vm.paused.<pid>)") \ 3863 \ 3864 diagnostic(bool, PauseAtExit, false, \ 3865 "Pause and wait for keypress on exit if a debugger is attached") \ 3866 \ 3867 product(bool, ExtendedDTraceProbes, false, \ 3868 "Enable performance-impacting dtrace probes") \ 3869 \ 3870 product(bool, DTraceMethodProbes, false, \ 3871 "Enable dtrace probes for method-entry and method-exit") \ 3872 \ 3873 product(bool, DTraceAllocProbes, false, \ 3874 "Enable dtrace probes for object allocation") \ 3875 \ 3876 product(bool, DTraceMonitorProbes, false, \ 3877 "Enable dtrace probes for monitor events") \ 3878 \ 3879 product(bool, RelaxAccessControlCheck, false, \ 3880 "Relax the access control checks in the verifier") \ 3881 \ 3882 diagnostic(bool, PrintDTraceDOF, false, \ 3883 "Print the DTrace DOF passed to the system for JSDT probes") \ 3884 \ 3885 product(uintx, StringTableSize, 1009, \ 3886 "Number of buckets in the interned String table") \ 3887 \ 3888 product(bool, UseVMInterruptibleIO, false, \ 3889 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3890 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3891 " of this flag is true for JDK 6 and earlier") \ 3892 \ 3893 diagnostic(bool, WhiteBoxAPI, false, \ 3894 "Enable internal testing APIs") \ 3895 \ 3896 product(bool, PrintGCCause, true, \ 3897 "Include GC cause in GC logging") 3898 3899/* 3900 * Macros for factoring of globals 3901 */ 3902 3903// Interface macros 3904#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3905#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3906#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3907#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3908#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3909#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3910#ifdef PRODUCT 3911#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3912#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3913#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3914#else 3915#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3916#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3917#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3918#endif 3919// Special LP64 flags, product only needed for now. 3920#ifdef _LP64 3921#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3922#else 3923#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3924#endif // _LP64 3925 3926// Implementation macros 3927#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3928#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3929#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3930#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3931#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3932#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3933#ifdef PRODUCT 3934#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3935#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3936#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3937#else 3938#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3939#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3940#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3941#endif 3942#ifdef _LP64 3943#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3944#else 3945#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3946#endif // _LP64 3947 3948RUNTIME_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) 3949 3950RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3951 3952// Extensions 3953 3954#include "runtime/globals_ext.hpp" 3955 3956#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3957