globals.hpp revision 5963:b55e4bd0389e
1251881Speter/* 2251881Speter * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3251881Speter * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4251881Speter * 5251881Speter * This code is free software; you can redistribute it and/or modify it 6251881Speter * under the terms of the GNU General Public License version 2 only, as 7251881Speter * published by the Free Software Foundation. 8251881Speter * 9251881Speter * This code is distributed in the hope that it will be useful, but WITHOUT 10251881Speter * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11251881Speter * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12251881Speter * version 2 for more details (a copy is included in the LICENSE file that 13251881Speter * accompanied this code). 14251881Speter * 15251881Speter * You should have received a copy of the GNU General Public License version 16251881Speter * 2 along with this work; if not, write to the Free Software Foundation, 17251881Speter * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18251881Speter * 19251881Speter * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20251881Speter * or visit www.oracle.com if you need additional information or have any 21251881Speter * questions. 22251881Speter * 23251881Speter */ 24251881Speter 25251881Speter#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26251881Speter#define SHARE_VM_RUNTIME_GLOBALS_HPP 27251881Speter 28251881Speter#include "utilities/debug.hpp" 29251881Speter 30251881Speter// use this for flags that are true per default in the tiered build 31251881Speter// but false in non-tiered builds, and vice versa 32262253Speter#ifdef TIERED 33251881Speter#define trueInTiered true 34251881Speter#define falseInTiered false 35251881Speter#else 36251881Speter#define trueInTiered false 37251881Speter#define falseInTiered true 38251881Speter#endif 39251881Speter 40251881Speter#ifdef TARGET_ARCH_x86 41251881Speter# include "globals_x86.hpp" 42251881Speter#endif 43251881Speter#ifdef TARGET_ARCH_sparc 44251881Speter# include "globals_sparc.hpp" 45251881Speter#endif 46251881Speter#ifdef TARGET_ARCH_zero 47251881Speter# include "globals_zero.hpp" 48251881Speter#endif 49251881Speter#ifdef TARGET_ARCH_arm 50251881Speter# include "globals_arm.hpp" 51251881Speter#endif 52251881Speter#ifdef TARGET_ARCH_ppc 53251881Speter# include "globals_ppc.hpp" 54251881Speter#endif 55251881Speter#ifdef TARGET_OS_FAMILY_linux 56251881Speter# include "globals_linux.hpp" 57251881Speter#endif 58251881Speter#ifdef TARGET_OS_FAMILY_solaris 59251881Speter# include "globals_solaris.hpp" 60251881Speter#endif 61251881Speter#ifdef TARGET_OS_FAMILY_windows 62251881Speter# include "globals_windows.hpp" 63251881Speter#endif 64251881Speter#ifdef TARGET_OS_FAMILY_bsd 65251881Speter# include "globals_bsd.hpp" 66251881Speter#endif 67251881Speter#ifdef TARGET_OS_ARCH_linux_x86 68251881Speter# include "globals_linux_x86.hpp" 69251881Speter#endif 70251881Speter#ifdef TARGET_OS_ARCH_linux_sparc 71251881Speter# include "globals_linux_sparc.hpp" 72251881Speter#endif 73251881Speter#ifdef TARGET_OS_ARCH_linux_zero 74251881Speter# include "globals_linux_zero.hpp" 75251881Speter#endif 76251881Speter#ifdef TARGET_OS_ARCH_solaris_x86 77251881Speter# include "globals_solaris_x86.hpp" 78251881Speter#endif 79251881Speter#ifdef TARGET_OS_ARCH_solaris_sparc 80251881Speter# include "globals_solaris_sparc.hpp" 81251881Speter#endif 82251881Speter#ifdef TARGET_OS_ARCH_windows_x86 83251881Speter# include "globals_windows_x86.hpp" 84251881Speter#endif 85251881Speter#ifdef TARGET_OS_ARCH_linux_arm 86251881Speter# include "globals_linux_arm.hpp" 87251881Speter#endif 88251881Speter#ifdef TARGET_OS_ARCH_linux_ppc 89251881Speter# include "globals_linux_ppc.hpp" 90251881Speter#endif 91251881Speter#ifdef TARGET_OS_ARCH_bsd_x86 92251881Speter# include "globals_bsd_x86.hpp" 93251881Speter#endif 94251881Speter#ifdef TARGET_OS_ARCH_bsd_zero 95251881Speter# include "globals_bsd_zero.hpp" 96251881Speter#endif 97251881Speter#ifdef COMPILER1 98251881Speter#ifdef TARGET_ARCH_x86 99251881Speter# include "c1_globals_x86.hpp" 100251881Speter#endif 101251881Speter#ifdef TARGET_ARCH_sparc 102251881Speter# include "c1_globals_sparc.hpp" 103251881Speter#endif 104251881Speter#ifdef TARGET_ARCH_arm 105251881Speter# include "c1_globals_arm.hpp" 106251881Speter#endif 107251881Speter#ifdef TARGET_ARCH_ppc 108251881Speter# include "c1_globals_ppc.hpp" 109251881Speter#endif 110251881Speter#ifdef TARGET_OS_FAMILY_linux 111251881Speter# include "c1_globals_linux.hpp" 112251881Speter#endif 113251881Speter#ifdef TARGET_OS_FAMILY_solaris 114262253Speter# include "c1_globals_solaris.hpp" 115251881Speter#endif 116251881Speter#ifdef TARGET_OS_FAMILY_windows 117251881Speter# include "c1_globals_windows.hpp" 118251881Speter#endif 119251881Speter#ifdef TARGET_OS_FAMILY_bsd 120251881Speter# include "c1_globals_bsd.hpp" 121251881Speter#endif 122251881Speter#endif 123251881Speter#ifdef COMPILER2 124251881Speter#ifdef TARGET_ARCH_x86 125251881Speter# include "c2_globals_x86.hpp" 126251881Speter#endif 127251881Speter#ifdef TARGET_ARCH_sparc 128251881Speter# include "c2_globals_sparc.hpp" 129251881Speter#endif 130251881Speter#ifdef TARGET_ARCH_arm 131251881Speter# include "c2_globals_arm.hpp" 132251881Speter#endif 133251881Speter#ifdef TARGET_OS_FAMILY_linux 134251881Speter# include "c2_globals_linux.hpp" 135251881Speter#endif 136251881Speter#ifdef TARGET_OS_FAMILY_solaris 137251881Speter# include "c2_globals_solaris.hpp" 138251881Speter#endif 139251881Speter#ifdef TARGET_OS_FAMILY_windows 140251881Speter# include "c2_globals_windows.hpp" 141251881Speter#endif 142251881Speter#ifdef TARGET_OS_FAMILY_bsd 143251881Speter# include "c2_globals_bsd.hpp" 144251881Speter#endif 145251881Speter#endif 146251881Speter#ifdef SHARK 147251881Speter#ifdef TARGET_ARCH_zero 148251881Speter# include "shark_globals_zero.hpp" 149251881Speter#endif 150251881Speter#endif 151251881Speter 152251881Speter#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 153251881Speterdefine_pd_global(bool, BackgroundCompilation, false); 154251881Speterdefine_pd_global(bool, UseTLAB, false); 155251881Speterdefine_pd_global(bool, CICompileOSR, false); 156251881Speterdefine_pd_global(bool, UseTypeProfile, false); 157251881Speterdefine_pd_global(bool, UseOnStackReplacement, false); 158251881Speterdefine_pd_global(bool, InlineIntrinsics, false); 159251881Speterdefine_pd_global(bool, PreferInterpreterNativeStubs, true); 160251881Speterdefine_pd_global(bool, ProfileInterpreter, false); 161251881Speterdefine_pd_global(bool, ProfileTraps, false); 162251881Speterdefine_pd_global(bool, TieredCompilation, false); 163251881Speter 164251881Speterdefine_pd_global(intx, CompileThreshold, 0); 165251881Speterdefine_pd_global(intx, BackEdgeThreshold, 0); 166251881Speter 167251881Speterdefine_pd_global(intx, OnStackReplacePercentage, 0); 168251881Speterdefine_pd_global(bool, ResizeTLAB, false); 169251881Speterdefine_pd_global(intx, FreqInlineSize, 0); 170251881Speterdefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 171251881Speterdefine_pd_global(intx, InlineClassNatives, true); 172251881Speterdefine_pd_global(intx, InlineUnsafeOps, true); 173251881Speterdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 174251881Speterdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 175251881Speterdefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 176251881Speterdefine_pd_global(intx, CodeCacheMinBlockLength, 1); 177251881Speterdefine_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 178251881Speterdefine_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 179251881Speterdefine_pd_global(bool, NeverActAsServerClassMachine, true); 180251881Speterdefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 181251881Speter#define CI_COMPILER_COUNT 0 182251881Speter#else 183251881Speter 184251881Speter#ifdef COMPILER2 185251881Speter#define CI_COMPILER_COUNT 2 186251881Speter#else 187251881Speter#define CI_COMPILER_COUNT 1 188251881Speter#endif // COMPILER2 189251881Speter 190251881Speter#endif // no compilers 191251881Speter 192251881Speter// string type aliases used only in this file 193251881Spetertypedef const char* ccstr; 194251881Spetertypedef const char* ccstrlist; // represents string arguments which accumulate 195251881Speter 196251881Speterenum FlagValueOrigin { 197251881Speter DEFAULT = 0, 198251881Speter COMMAND_LINE = 1, 199251881Speter ENVIRON_VAR = 2, 200251881Speter CONFIG_FILE = 3, 201251881Speter MANAGEMENT = 4, 202251881Speter ERGONOMIC = 5, 203251881Speter ATTACH_ON_DEMAND = 6, 204251881Speter INTERNAL = 99 205251881Speter}; 206251881Speter 207251881Speterstruct Flag { 208251881Speter const char *type; 209251881Speter const char *name; 210251881Speter void* addr; 211251881Speter 212251881Speter NOT_PRODUCT(const char *doc;) 213251881Speter 214251881Speter const char *kind; 215251881Speter FlagValueOrigin origin; 216251881Speter 217251881Speter // points to all Flags static array 218251881Speter static Flag *flags; 219251881Speter 220251881Speter // number of flags 221251881Speter static size_t numFlags; 222251881Speter 223251881Speter static Flag* find_flag(const char* name, size_t length, bool allow_locked = false); 224251881Speter static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 225251881Speter 226251881Speter bool is_bool() const { return strcmp(type, "bool") == 0; } 227251881Speter bool get_bool() const { return *((bool*) addr); } 228251881Speter void set_bool(bool value) { *((bool*) addr) = value; } 229251881Speter 230251881Speter bool is_intx() const { return strcmp(type, "intx") == 0; } 231251881Speter intx get_intx() const { return *((intx*) addr); } 232251881Speter void set_intx(intx value) { *((intx*) addr) = value; } 233251881Speter 234251881Speter bool is_uintx() const { return strcmp(type, "uintx") == 0; } 235251881Speter uintx get_uintx() const { return *((uintx*) addr); } 236251881Speter void set_uintx(uintx value) { *((uintx*) addr) = value; } 237251881Speter 238251881Speter bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 239251881Speter uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 240251881Speter void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 241251881Speter 242251881Speter bool is_double() const { return strcmp(type, "double") == 0; } 243251881Speter double get_double() const { return *((double*) addr); } 244251881Speter void set_double(double value) { *((double*) addr) = value; } 245251881Speter 246251881Speter bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 247251881Speter bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 248251881Speter ccstr get_ccstr() const { return *((ccstr*) addr); } 249251881Speter void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 250251881Speter 251251881Speter bool is_unlocker() const; 252251881Speter bool is_unlocked() const; 253251881Speter bool is_writeable() const; 254251881Speter bool is_external() const; 255251881Speter 256251881Speter bool is_unlocker_ext() const; 257251881Speter bool is_unlocked_ext() const; 258251881Speter bool is_writeable_ext() const; 259251881Speter bool is_external_ext() const; 260251881Speter 261251881Speter void get_locked_message(char*, int) const; 262251881Speter void get_locked_message_ext(char*, int) const; 263251881Speter 264251881Speter void print_on(outputStream* st, bool withComments = false ); 265251881Speter void print_as_flag(outputStream* st); 266251881Speter}; 267251881Speter 268251881Speter// debug flags control various aspects of the VM and are global accessible 269251881Speter 270251881Speter// use FlagSetting to temporarily change some debug flag 271251881Speter// e.g. FlagSetting fs(DebugThisAndThat, true); 272251881Speter// restored to previous value upon leaving scope 273251881Speterclass FlagSetting { 274251881Speter bool val; 275251881Speter bool* flag; 276251881Speter public: 277251881Speter FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 278251881Speter ~FlagSetting() { *flag = val; } 279251881Speter}; 280251881Speter 281251881Speter 282251881Speterclass CounterSetting { 283251881Speter intx* counter; 284251881Speter public: 285251881Speter CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 286251881Speter ~CounterSetting() { (*counter)--; } 287251881Speter}; 288251881Speter 289251881Speter 290251881Speterclass UIntFlagSetting { 291251881Speter uintx val; 292251881Speter uintx* flag; 293251881Speter public: 294251881Speter UIntFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 295251881Speter ~UIntFlagSetting() { *flag = val; } 296251881Speter}; 297251881Speter 298251881Speter 299251881Speterclass DoubleFlagSetting { 300251881Speter double val; 301251881Speter 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 lp64_product(bool, UseCompressedKlassPointers, false, \ 446 "Use 32-bit klass pointers in 64-bit VM " \ 447 "lp64_product means flag is always constant in 32 bit VM") \ 448 \ 449 notproduct(bool, CheckCompressedOops, true, \ 450 "generate checks in encoding/decoding code in debug VM") \ 451 \ 452 product_pd(uintx, HeapBaseMinAddress, \ 453 "OS specific low limit for heap base address") \ 454 \ 455 diagnostic(bool, PrintCompressedOopsMode, false, \ 456 "Print compressed oops base address and encoding mode") \ 457 \ 458 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 459 "Default object alignment in bytes, 8 is minimum") \ 460 \ 461 product(bool, AssumeMP, false, \ 462 "Instruct the VM to assume multiple processors are available") \ 463 \ 464 /* UseMembar is theoretically a temp flag used for memory barrier \ 465 * removal testing. It was supposed to be removed before FCS but has \ 466 * been re-added (see 6401008) */ \ 467 product_pd(bool, UseMembar, \ 468 "(Unstable) Issues membars on thread state transitions") \ 469 \ 470 /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 471 * that don't support it. This will be replaced by processor detection \ 472 * logic. \ 473 */ \ 474 product(bool, UsePPCLWSYNC, true, \ 475 "Use lwsync instruction if true, else use slower sync") \ 476 \ 477 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 478 "Whether to clean the chunk pool asynchronously") \ 479 \ 480 /* Temporary: See 6948537 */ \ 481 experimental(bool, UseMemSetInBOT, true, \ 482 "(Unstable) uses memset in BOT updates in GC code") \ 483 \ 484 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 485 "Enable normal processing of flags relating to field diagnostics")\ 486 \ 487 experimental(bool, UnlockExperimentalVMOptions, false, \ 488 "Enable normal processing of flags relating to experimental features")\ 489 \ 490 product(bool, JavaMonitorsInStackTrace, true, \ 491 "Print info. about Java monitor locks when the stacks are dumped")\ 492 \ 493 product_pd(bool, UseLargePages, \ 494 "Use large page memory") \ 495 \ 496 product_pd(bool, UseLargePagesIndividualAllocation, \ 497 "Allocate large pages individually for better affinity") \ 498 \ 499 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 500 "Fail large pages individual allocation") \ 501 \ 502 develop(bool, TracePageSizes, false, \ 503 "Trace page size selection and usage.") \ 504 \ 505 product(bool, UseNUMA, false, \ 506 "Use NUMA if available") \ 507 \ 508 product(bool, UseNUMAInterleaving, false, \ 509 "Interleave memory across NUMA nodes if available") \ 510 \ 511 product(uintx, NUMAInterleaveGranularity, 2*M, \ 512 "Granularity to use for NUMA interleaving on Windows OS") \ 513 \ 514 product(bool, ForceNUMA, false, \ 515 "Force NUMA optimizations on single-node/UMA systems") \ 516 \ 517 product(uintx, NUMAChunkResizeWeight, 20, \ 518 "Percentage (0-100) used to weigh the current sample when " \ 519 "computing exponentially decaying average for " \ 520 "AdaptiveNUMAChunkSizing") \ 521 \ 522 product(uintx, NUMASpaceResizeRate, 1*G, \ 523 "Do not reallocate more that this amount per collection") \ 524 \ 525 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 526 "Enable adaptive chunk sizing for NUMA") \ 527 \ 528 product(bool, NUMAStats, false, \ 529 "Print NUMA stats in detailed heap information") \ 530 \ 531 product(uintx, NUMAPageScanRate, 256, \ 532 "Maximum number of pages to include in the page scan procedure") \ 533 \ 534 product_pd(bool, NeedsDeoptSuspend, \ 535 "True for register window machines (sparc/ia64)") \ 536 \ 537 product(intx, UseSSE, 99, \ 538 "Highest supported SSE instructions set on x86/x64") \ 539 \ 540 product(bool, UseAES, false, \ 541 "Control whether AES instructions can be used on x86/x64") \ 542 \ 543 product(uintx, LargePageSizeInBytes, 0, \ 544 "Large page size (0 to let VM choose the page size") \ 545 \ 546 product(uintx, LargePageHeapSizeThreshold, 128*M, \ 547 "Use large pages if max heap is at least this big") \ 548 \ 549 product(bool, ForceTimeHighResolution, false, \ 550 "Using high time resolution(For Win32 only)") \ 551 \ 552 develop(bool, TraceItables, false, \ 553 "Trace initialization and use of itables") \ 554 \ 555 develop(bool, TracePcPatching, false, \ 556 "Trace usage of frame::patch_pc") \ 557 \ 558 develop(bool, TraceJumps, false, \ 559 "Trace assembly jumps in thread ring buffer") \ 560 \ 561 develop(bool, TraceRelocator, false, \ 562 "Trace the bytecode relocator") \ 563 \ 564 develop(bool, TraceLongCompiles, false, \ 565 "Print out every time compilation is longer than " \ 566 "a given threashold") \ 567 \ 568 develop(bool, SafepointALot, false, \ 569 "Generates a lot of safepoints. Works with " \ 570 "GuaranteedSafepointInterval") \ 571 \ 572 product_pd(bool, BackgroundCompilation, \ 573 "A thread requesting compilation is not blocked during " \ 574 "compilation") \ 575 \ 576 product(bool, PrintVMQWaitTime, false, \ 577 "Prints out the waiting time in VM operation queue") \ 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, InlineNatives, true, \ 622 "inline natives that are known to be part of base library DLL") \ 623 \ 624 develop(bool, InlineMathNatives, true, \ 625 "inline SinD, CosD, etc.") \ 626 \ 627 develop(bool, InlineClassNatives, true, \ 628 "inline Class.isInstance, etc") \ 629 \ 630 develop(bool, InlineThreadNatives, true, \ 631 "inline Thread.currentThread, etc") \ 632 \ 633 develop(bool, InlineUnsafeOps, true, \ 634 "inline memory ops (native methods) from sun.misc.Unsafe") \ 635 \ 636 product(bool, CriticalJNINatives, true, \ 637 "check for critical JNI entry points") \ 638 \ 639 notproduct(bool, StressCriticalJNINatives, false, \ 640 "Exercise register saving code in critical natives") \ 641 \ 642 product(bool, UseSSE42Intrinsics, false, \ 643 "SSE4.2 versions of intrinsics") \ 644 \ 645 product(bool, UseAESIntrinsics, false, \ 646 "use intrinsics for AES versions of crypto") \ 647 \ 648 product(bool, UseCRC32Intrinsics, false, \ 649 "use intrinsics for java.util.zip.CRC32") \ 650 \ 651 develop(bool, TraceCallFixup, false, \ 652 "traces all call fixups") \ 653 \ 654 develop(bool, DeoptimizeALot, false, \ 655 "deoptimize at every exit from the runtime system") \ 656 \ 657 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 658 "a comma separated list of bcis to deoptimize at") \ 659 \ 660 product(bool, DeoptimizeRandom, false, \ 661 "deoptimize random frames on random exit from the runtime system")\ 662 \ 663 notproduct(bool, ZombieALot, false, \ 664 "creates zombies (non-entrant) at exit from the runt. system") \ 665 \ 666 product(bool, UnlinkSymbolsALot, false, \ 667 "unlink unreferenced symbols from the symbol table at safepoints")\ 668 \ 669 notproduct(bool, WalkStackALot, false, \ 670 "trace stack (no print) at every exit from the runtime system") \ 671 \ 672 product(bool, Debugging, false, \ 673 "set when executing debug methods in debug.ccp " \ 674 "(to prevent triggering assertions)") \ 675 \ 676 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 677 "Enable strict checks that safepoints cannot happen for threads " \ 678 "that used No_Safepoint_Verifier") \ 679 \ 680 notproduct(bool, VerifyLastFrame, false, \ 681 "Verify oops on last frame on entry to VM") \ 682 \ 683 develop(bool, TraceHandleAllocation, false, \ 684 "Prints out warnings when suspicious many handles are allocated") \ 685 \ 686 product(bool, UseCompilerSafepoints, true, \ 687 "Stop at safepoints in compiled code") \ 688 \ 689 product(bool, FailOverToOldVerifier, true, \ 690 "fail over to old verifier when split verifier fails") \ 691 \ 692 develop(bool, ShowSafepointMsgs, false, \ 693 "Show msg. about safepoint synch.") \ 694 \ 695 product(bool, SafepointTimeout, false, \ 696 "Time out and warn or fail after SafepointTimeoutDelay " \ 697 "milliseconds if failed to reach safepoint") \ 698 \ 699 develop(bool, DieOnSafepointTimeout, false, \ 700 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 701 \ 702 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 703 /* typically, at most a few retries are needed */ \ 704 product(intx, SuspendRetryCount, 50, \ 705 "Maximum retry count for an external suspend request") \ 706 \ 707 product(intx, SuspendRetryDelay, 5, \ 708 "Milliseconds to delay per retry (* current_retry_count)") \ 709 \ 710 product(bool, AssertOnSuspendWaitFailure, false, \ 711 "Assert/Guarantee on external suspend wait failure") \ 712 \ 713 product(bool, TraceSuspendWaitFailures, false, \ 714 "Trace external suspend wait failures") \ 715 \ 716 product(bool, MaxFDLimit, true, \ 717 "Bump the number of file descriptors to max in solaris.") \ 718 \ 719 diagnostic(bool, LogEvents, true, \ 720 "Enable the various ring buffer event logs") \ 721 \ 722 diagnostic(uintx, LogEventsBufferEntries, 10, \ 723 "Enable the various ring buffer event logs") \ 724 \ 725 product(bool, BytecodeVerificationRemote, true, \ 726 "Enables the Java bytecode verifier for remote classes") \ 727 \ 728 product(bool, BytecodeVerificationLocal, false, \ 729 "Enables the Java bytecode verifier for local classes") \ 730 \ 731 develop(bool, ForceFloatExceptions, trueInDebug, \ 732 "Force exceptions on FP stack under/overflow") \ 733 \ 734 develop(bool, VerifyStackAtCalls, false, \ 735 "Verify that the stack pointer is unchanged after calls") \ 736 \ 737 develop(bool, TraceJavaAssertions, false, \ 738 "Trace java language assertions") \ 739 \ 740 notproduct(bool, CheckAssertionStatusDirectives, false, \ 741 "temporary - see javaClasses.cpp") \ 742 \ 743 notproduct(bool, PrintMallocFree, false, \ 744 "Trace calls to C heap malloc/free allocation") \ 745 \ 746 product(bool, PrintOopAddress, false, \ 747 "Always print the location of the oop") \ 748 \ 749 notproduct(bool, VerifyCodeCacheOften, false, \ 750 "Verify compiled-code cache often") \ 751 \ 752 develop(bool, ZapDeadCompiledLocals, false, \ 753 "Zap dead locals in compiler frames") \ 754 \ 755 notproduct(bool, ZapDeadLocalsOld, false, \ 756 "Zap dead locals (old version, zaps all frames when " \ 757 "entering the VM") \ 758 \ 759 notproduct(bool, CheckOopishValues, false, \ 760 "Warn if value contains oop ( requires ZapDeadLocals)") \ 761 \ 762 develop(bool, UseMallocOnly, false, \ 763 "use only malloc/free for allocation (no resource area/arena)") \ 764 \ 765 develop(bool, PrintMalloc, false, \ 766 "print all malloc/free calls") \ 767 \ 768 develop(bool, PrintMallocStatistics, false, \ 769 "print malloc/free statistics") \ 770 \ 771 develop(bool, ZapResourceArea, trueInDebug, \ 772 "Zap freed resource/arena space with 0xABABABAB") \ 773 \ 774 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 775 "Zap freed VM handle space with 0xBCBCBCBC") \ 776 \ 777 develop(bool, ZapJNIHandleArea, trueInDebug, \ 778 "Zap freed JNI handle space with 0xFEFEFEFE") \ 779 \ 780 notproduct(bool, ZapStackSegments, trueInDebug, \ 781 "Zap allocated/freed Stack segments with 0xFADFADED") \ 782 \ 783 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 784 "Zap unused heap space with 0xBAADBABE") \ 785 \ 786 develop(bool, TraceZapUnusedHeapArea, false, \ 787 "Trace zapping of unused heap space") \ 788 \ 789 develop(bool, CheckZapUnusedHeapArea, false, \ 790 "Check zapping of unused heap space") \ 791 \ 792 develop(bool, ZapFillerObjects, trueInDebug, \ 793 "Zap filler objects with 0xDEAFBABE") \ 794 \ 795 develop(bool, PrintVMMessages, true, \ 796 "Print vm messages on console") \ 797 \ 798 product(bool, PrintGCApplicationConcurrentTime, false, \ 799 "Print the time the application has been running") \ 800 \ 801 product(bool, PrintGCApplicationStoppedTime, false, \ 802 "Print the time the application has been stopped") \ 803 \ 804 diagnostic(bool, VerboseVerification, false, \ 805 "Display detailed verification details") \ 806 \ 807 notproduct(uintx, ErrorHandlerTest, 0, \ 808 "If > 0, provokes an error after VM initialization; the value" \ 809 "determines which error to provoke. See test_error_handler()" \ 810 "in debug.cpp.") \ 811 \ 812 develop(bool, Verbose, false, \ 813 "Prints additional debugging information from other modes") \ 814 \ 815 develop(bool, PrintMiscellaneous, false, \ 816 "Prints uncategorized debugging information (requires +Verbose)") \ 817 \ 818 develop(bool, WizardMode, false, \ 819 "Prints much more debugging information") \ 820 \ 821 product(bool, ShowMessageBoxOnError, false, \ 822 "Keep process alive on VM fatal error") \ 823 \ 824 product(bool, CreateMinidumpOnCrash, false, \ 825 "Create minidump on VM fatal error") \ 826 \ 827 product_pd(bool, UseOSErrorReporting, \ 828 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 829 \ 830 product(bool, SuppressFatalErrorMessage, false, \ 831 "Do NO Fatal Error report [Avoid deadlock]") \ 832 \ 833 product(ccstrlist, OnError, "", \ 834 "Run user-defined commands on fatal error; see VMError.cpp " \ 835 "for examples") \ 836 \ 837 product(ccstrlist, OnOutOfMemoryError, "", \ 838 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 839 \ 840 manageable(bool, HeapDumpBeforeFullGC, false, \ 841 "Dump heap to file before any major stop-world GC") \ 842 \ 843 manageable(bool, HeapDumpAfterFullGC, false, \ 844 "Dump heap to file after any major stop-world GC") \ 845 \ 846 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 847 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 848 \ 849 manageable(ccstr, HeapDumpPath, NULL, \ 850 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 851 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 852 "in the working directory)") \ 853 \ 854 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 855 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 856 "when the heap usage is larger than this") \ 857 \ 858 develop(uintx, HeapDumpSegmentSize, 1*G, \ 859 "Approximate segment size when generating a segmented heap dump") \ 860 \ 861 develop(bool, BreakAtWarning, false, \ 862 "Execute breakpoint upon encountering VM warning") \ 863 \ 864 develop(bool, TraceVMOperation, false, \ 865 "Trace vm operations") \ 866 \ 867 develop(bool, UseFakeTimers, false, \ 868 "Tells whether the VM should use system time or a fake timer") \ 869 \ 870 product(ccstr, NativeMemoryTracking, "off", \ 871 "Native memory tracking options") \ 872 \ 873 diagnostic(bool, PrintNMTStatistics, false, \ 874 "Print native memory tracking summary data if it is on") \ 875 \ 876 diagnostic(bool, AutoShutdownNMT, true, \ 877 "Automatically shutdown native memory tracking under stress " \ 878 "situation. When set to false, native memory tracking tries to " \ 879 "stay alive at the expense of JVM performance") \ 880 \ 881 diagnostic(bool, LogCompilation, false, \ 882 "Log compilation activity in detail to hotspot.log or LogFile") \ 883 \ 884 product(bool, PrintCompilation, false, \ 885 "Print compilations") \ 886 \ 887 diagnostic(bool, TraceNMethodInstalls, false, \ 888 "Trace nmethod intallation") \ 889 \ 890 diagnostic(intx, ScavengeRootsInCode, 2, \ 891 "0: do not allow scavengable oops in the code cache; " \ 892 "1: allow scavenging from the code cache; " \ 893 "2: emit as many constants as the compiler can see") \ 894 \ 895 product(bool, AlwaysRestoreFPU, false, \ 896 "Restore the FPU control word after every JNI call (expensive)") \ 897 \ 898 diagnostic(bool, PrintCompilation2, false, \ 899 "Print additional statistics per compilation") \ 900 \ 901 diagnostic(bool, PrintAdapterHandlers, false, \ 902 "Print code generated for i2c/c2i adapters") \ 903 \ 904 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 905 "Verify that i2c/c2i adapters are called properly") \ 906 \ 907 develop(bool, VerifyAdapterSharing, false, \ 908 "Verify that the code for shared adapters is the equivalent") \ 909 \ 910 diagnostic(bool, PrintAssembly, false, \ 911 "Print assembly code (using external disassembler.so)") \ 912 \ 913 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 914 "Options string passed to disassembler.so") \ 915 \ 916 diagnostic(bool, PrintNMethods, false, \ 917 "Print assembly code for nmethods when generated") \ 918 \ 919 diagnostic(bool, PrintNativeNMethods, false, \ 920 "Print assembly code for native nmethods when generated") \ 921 \ 922 develop(bool, PrintDebugInfo, false, \ 923 "Print debug information for all nmethods when generated") \ 924 \ 925 develop(bool, PrintRelocations, false, \ 926 "Print relocation information for all nmethods when generated") \ 927 \ 928 develop(bool, PrintDependencies, false, \ 929 "Print dependency information for all nmethods when generated") \ 930 \ 931 develop(bool, PrintExceptionHandlers, false, \ 932 "Print exception handler tables for all nmethods when generated") \ 933 \ 934 develop(bool, StressCompiledExceptionHandlers, false, \ 935 "Exercise compiled exception handlers") \ 936 \ 937 develop(bool, InterceptOSException, false, \ 938 "Starts debugger when an implicit OS (e.g., NULL) " \ 939 "exception happens") \ 940 \ 941 product(bool, PrintCodeCache, false, \ 942 "Print the code cache memory usage when exiting") \ 943 \ 944 develop(bool, PrintCodeCache2, false, \ 945 "Print detailed usage info on the code cache when exiting") \ 946 \ 947 product(bool, PrintCodeCacheOnCompilation, false, \ 948 "Print the code cache memory usage each time a method is compiled") \ 949 \ 950 diagnostic(bool, PrintStubCode, false, \ 951 "Print generated stub code") \ 952 \ 953 product(bool, StackTraceInThrowable, true, \ 954 "Collect backtrace in throwable when exception happens") \ 955 \ 956 product(bool, OmitStackTraceInFastThrow, true, \ 957 "Omit backtraces for some 'hot' exceptions in optimized code") \ 958 \ 959 product(bool, ProfilerPrintByteCodeStatistics, false, \ 960 "Prints byte code statictics when dumping profiler output") \ 961 \ 962 product(bool, ProfilerRecordPC, false, \ 963 "Collects tick for each 16 byte interval of compiled code") \ 964 \ 965 product(bool, ProfileVM, false, \ 966 "Profiles ticks that fall within VM (either in the VM Thread " \ 967 "or VM code called through stubs)") \ 968 \ 969 product(bool, ProfileIntervals, false, \ 970 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 971 \ 972 notproduct(bool, ProfilerCheckIntervals, false, \ 973 "Collect and print info on spacing of profiler ticks") \ 974 \ 975 develop(bool, PrintJVMWarnings, false, \ 976 "Prints warnings for unimplemented JVM functions") \ 977 \ 978 product(bool, PrintWarnings, true, \ 979 "Prints JVM warnings to output stream") \ 980 \ 981 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 982 "Prints warnings for stalled SpinLocks") \ 983 \ 984 product(bool, RegisterFinalizersAtInit, true, \ 985 "Register finalizable objects at end of Object.<init> or " \ 986 "after allocation") \ 987 \ 988 develop(bool, RegisterReferences, true, \ 989 "Tells whether the VM should register soft/weak/final/phantom " \ 990 "references") \ 991 \ 992 develop(bool, IgnoreRewrites, false, \ 993 "Supress rewrites of bytecodes in the oopmap generator. " \ 994 "This is unsafe!") \ 995 \ 996 develop(bool, PrintCodeCacheExtension, false, \ 997 "Print extension of code cache") \ 998 \ 999 develop(bool, UsePrivilegedStack, true, \ 1000 "Enable the security JVM functions") \ 1001 \ 1002 develop(bool, ProtectionDomainVerification, true, \ 1003 "Verifies protection domain before resolution in system " \ 1004 "dictionary") \ 1005 \ 1006 product(bool, ClassUnloading, true, \ 1007 "Do unloading of classes") \ 1008 \ 1009 develop(bool, DisableStartThread, false, \ 1010 "Disable starting of additional Java threads " \ 1011 "(for debugging only)") \ 1012 \ 1013 develop(bool, MemProfiling, false, \ 1014 "Write memory usage profiling to log file") \ 1015 \ 1016 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1017 "Prints the system dictionary at exit") \ 1018 \ 1019 experimental(intx, PredictedLoadedClassCount, 0, \ 1020 "Experimental: Tune loaded class cache starting size.") \ 1021 \ 1022 diagnostic(bool, UnsyncloadClass, false, \ 1023 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1024 "class loader must call VM synchronized for findClass " \ 1025 "and defineClass.") \ 1026 \ 1027 product(bool, AlwaysLockClassLoader, false, \ 1028 "Require the VM to acquire the class loader lock before calling " \ 1029 "loadClass() even for class loaders registering " \ 1030 "as parallel capable") \ 1031 \ 1032 product(bool, AllowParallelDefineClass, false, \ 1033 "Allow parallel defineClass requests for class loaders " \ 1034 "registering as parallel capable") \ 1035 \ 1036 product(bool, MustCallLoadClassInternal, false, \ 1037 "Call loadClassInternal() rather than loadClass()") \ 1038 \ 1039 product_pd(bool, DontYieldALot, \ 1040 "Throw away obvious excess yield calls (for SOLARIS only)") \ 1041 \ 1042 product_pd(bool, ConvertSleepToYield, \ 1043 "Converts sleep(0) to thread yield " \ 1044 "(may be off for SOLARIS to improve GUI)") \ 1045 \ 1046 product(bool, ConvertYieldToSleep, false, \ 1047 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 1048 "behavior (SOLARIS only)") \ 1049 \ 1050 product(bool, UseBoundThreads, true, \ 1051 "Bind user level threads to kernel threads (for SOLARIS only)") \ 1052 \ 1053 develop(bool, UseDetachedThreads, true, \ 1054 "Use detached threads that are recycled upon termination " \ 1055 "(for SOLARIS only)") \ 1056 \ 1057 product(bool, UseLWPSynchronization, true, \ 1058 "Use LWP-based instead of libthread-based synchronization " \ 1059 "(SPARC only)") \ 1060 \ 1061 product(ccstr, SyncKnobs, NULL, \ 1062 "(Unstable) Various monitor synchronization tunables") \ 1063 \ 1064 product(intx, EmitSync, 0, \ 1065 "(Unsafe,Unstable) " \ 1066 " Controls emission of inline sync fast-path code") \ 1067 \ 1068 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1069 \ 1070 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1071 \ 1072 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 1073 \ 1074 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 1075 \ 1076 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 1077 \ 1078 product(intx, hashCode, 5, \ 1079 "(Unstable) select hashCode generation algorithm" ) \ 1080 \ 1081 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1082 "(Unstable, Linux-specific)" \ 1083 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 1084 \ 1085 product(bool, FilterSpuriousWakeups, true, \ 1086 "Prevent spurious or premature wakeups from object.wait " \ 1087 "(Solaris only)") \ 1088 \ 1089 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1090 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1091 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1092 \ 1093 develop(bool, UsePthreads, false, \ 1094 "Use pthread-based instead of libthread-based synchronization " \ 1095 "(SPARC only)") \ 1096 \ 1097 product(bool, AdjustConcurrency, false, \ 1098 "call thr_setconcurrency at thread create time to avoid " \ 1099 "LWP starvation on MP systems (For Solaris Only)") \ 1100 \ 1101 product(bool, ReduceSignalUsage, false, \ 1102 "Reduce the use of OS signals in Java and/or the VM") \ 1103 \ 1104 develop_pd(bool, ShareVtableStubs, \ 1105 "Share vtable stubs (smaller code but worse branch prediction") \ 1106 \ 1107 develop(bool, LoadLineNumberTables, true, \ 1108 "Tells whether the class file parser loads line number tables") \ 1109 \ 1110 develop(bool, LoadLocalVariableTables, true, \ 1111 "Tells whether the class file parser loads local variable tables")\ 1112 \ 1113 develop(bool, LoadLocalVariableTypeTables, true, \ 1114 "Tells whether the class file parser loads local variable type tables")\ 1115 \ 1116 product(bool, AllowUserSignalHandlers, false, \ 1117 "Do not complain if the application installs signal handlers " \ 1118 "(Solaris & Linux only)") \ 1119 \ 1120 product(bool, UseSignalChaining, true, \ 1121 "Use signal-chaining to invoke signal handlers installed " \ 1122 "by the application (Solaris & Linux only)") \ 1123 \ 1124 product(bool, UseAltSigs, false, \ 1125 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1126 "internal signals (Solaris only)") \ 1127 \ 1128 product(bool, AllowJNIEnvProxy, false, \ 1129 "Allow JNIEnv proxies for jdbx") \ 1130 \ 1131 product(bool, JNIDetachReleasesMonitors, true, \ 1132 "JNI DetachCurrentThread releases monitors owned by thread") \ 1133 \ 1134 product(bool, RestoreMXCSROnJNICalls, false, \ 1135 "Restore MXCSR when returning from JNI calls") \ 1136 \ 1137 product(bool, CheckJNICalls, false, \ 1138 "Verify all arguments to JNI calls") \ 1139 \ 1140 product(bool, UseFastJNIAccessors, true, \ 1141 "Use optimized versions of Get<Primitive>Field") \ 1142 \ 1143 product(bool, EagerXrunInit, false, \ 1144 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1145 " but not all -Xrun libraries may support the state of the VM at this time") \ 1146 \ 1147 product(bool, PreserveAllAnnotations, false, \ 1148 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1149 \ 1150 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1151 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1152 \ 1153 product(bool, LazyBootClassLoader, true, \ 1154 "Enable/disable lazy opening of boot class path entries") \ 1155 \ 1156 product(bool, UseXMMForArrayCopy, false, \ 1157 "Use SSE2 MOVQ instruction for Arraycopy") \ 1158 \ 1159 product(intx, FieldsAllocationStyle, 1, \ 1160 "0 - type based with oops first, 1 - with oops last, " \ 1161 "2 - oops in super and sub classes are together") \ 1162 \ 1163 product(bool, CompactFields, true, \ 1164 "Allocate nonstatic fields in gaps between previous fields") \ 1165 \ 1166 notproduct(bool, PrintFieldLayout, false, \ 1167 "Print field layout for each class") \ 1168 \ 1169 product(intx, ContendedPaddingWidth, 128, \ 1170 "How many bytes to pad the fields/classes marked @Contended with")\ 1171 \ 1172 product(bool, EnableContended, true, \ 1173 "Enable @Contended annotation support") \ 1174 \ 1175 product(bool, RestrictContended, true, \ 1176 "Restrict @Contended to trusted classes") \ 1177 \ 1178 product(bool, UseBiasedLocking, true, \ 1179 "Enable biased locking in JVM") \ 1180 \ 1181 product(intx, BiasedLockingStartupDelay, 4000, \ 1182 "Number of milliseconds to wait before enabling biased locking") \ 1183 \ 1184 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1185 "Print statistics of biased locking in JVM") \ 1186 \ 1187 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1188 "Threshold of number of revocations per type to try to " \ 1189 "rebias all objects in the heap of that type") \ 1190 \ 1191 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1192 "Threshold of number of revocations per type to permanently " \ 1193 "revoke biases of all objects in the heap of that type") \ 1194 \ 1195 product(intx, BiasedLockingDecayTime, 25000, \ 1196 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1197 "type after previous bulk rebias") \ 1198 \ 1199 /* tracing */ \ 1200 \ 1201 notproduct(bool, TraceRuntimeCalls, false, \ 1202 "Trace run-time calls") \ 1203 \ 1204 develop(bool, TraceJNICalls, false, \ 1205 "Trace JNI calls") \ 1206 \ 1207 notproduct(bool, TraceJVMCalls, false, \ 1208 "Trace JVM calls") \ 1209 \ 1210 product(ccstr, TraceJVMTI, NULL, \ 1211 "Trace flags for JVMTI functions and events") \ 1212 \ 1213 /* This option can change an EMCP method into an obsolete method. */ \ 1214 /* This can affect tests that except specific methods to be EMCP. */ \ 1215 /* This option should be used with caution. */ \ 1216 product(bool, StressLdcRewrite, false, \ 1217 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1218 \ 1219 product(intx, TraceRedefineClasses, 0, \ 1220 "Trace level for JVMTI RedefineClasses") \ 1221 \ 1222 develop(bool, StressMethodComparator, false, \ 1223 "run the MethodComparator on all loaded methods") \ 1224 \ 1225 /* change to false by default sometime after Mustang */ \ 1226 product(bool, VerifyMergedCPBytecodes, true, \ 1227 "Verify bytecodes after RedefineClasses constant pool merging") \ 1228 \ 1229 develop(bool, TraceJNIHandleAllocation, false, \ 1230 "Trace allocation/deallocation of JNI handle blocks") \ 1231 \ 1232 develop(bool, TraceThreadEvents, false, \ 1233 "Trace all thread events") \ 1234 \ 1235 develop(bool, TraceBytecodes, false, \ 1236 "Trace bytecode execution") \ 1237 \ 1238 develop(bool, TraceClassInitialization, false, \ 1239 "Trace class initialization") \ 1240 \ 1241 develop(bool, TraceExceptions, false, \ 1242 "Trace exceptions") \ 1243 \ 1244 develop(bool, TraceICs, false, \ 1245 "Trace inline cache changes") \ 1246 \ 1247 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1248 "Trace method invocation counter overflow") \ 1249 \ 1250 develop(bool, TraceInlineCacheClearing, false, \ 1251 "Trace clearing of inline caches in nmethods") \ 1252 \ 1253 develop(bool, TraceDependencies, false, \ 1254 "Trace dependencies") \ 1255 \ 1256 develop(bool, VerifyDependencies, trueInDebug, \ 1257 "Exercise and verify the compilation dependency mechanism") \ 1258 \ 1259 develop(bool, TraceNewOopMapGeneration, false, \ 1260 "Trace OopMapGeneration") \ 1261 \ 1262 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1263 "Trace OopMapGeneration: print detailed cell states") \ 1264 \ 1265 develop(bool, TimeOopMap, false, \ 1266 "Time calls to GenerateOopMap::compute_map() in sum") \ 1267 \ 1268 develop(bool, TimeOopMap2, false, \ 1269 "Time calls to GenerateOopMap::compute_map() individually") \ 1270 \ 1271 develop(bool, TraceMonitorMismatch, false, \ 1272 "Trace monitor matching failures during OopMapGeneration") \ 1273 \ 1274 develop(bool, TraceOopMapRewrites, false, \ 1275 "Trace rewritting of method oops during oop map generation") \ 1276 \ 1277 develop(bool, TraceSafepoint, false, \ 1278 "Trace safepoint operations") \ 1279 \ 1280 develop(bool, TraceICBuffer, false, \ 1281 "Trace usage of IC buffer") \ 1282 \ 1283 develop(bool, TraceCompiledIC, false, \ 1284 "Trace changes of compiled IC") \ 1285 \ 1286 notproduct(bool, TraceZapDeadLocals, false, \ 1287 "Trace zapping dead locals") \ 1288 \ 1289 develop(bool, TraceStartupTime, false, \ 1290 "Trace setup time") \ 1291 \ 1292 develop(bool, TraceProtectionDomainVerification, false, \ 1293 "Trace protection domain verifcation") \ 1294 \ 1295 develop(bool, TraceClearedExceptions, false, \ 1296 "Prints when an exception is forcibly cleared") \ 1297 \ 1298 product(bool, TraceClassResolution, false, \ 1299 "Trace all constant pool resolutions (for debugging)") \ 1300 \ 1301 product(bool, TraceBiasedLocking, false, \ 1302 "Trace biased locking in JVM") \ 1303 \ 1304 product(bool, TraceMonitorInflation, false, \ 1305 "Trace monitor inflation in JVM") \ 1306 \ 1307 /* gc */ \ 1308 \ 1309 product(bool, UseSerialGC, false, \ 1310 "Use the serial garbage collector") \ 1311 \ 1312 product(bool, UseG1GC, false, \ 1313 "Use the Garbage-First garbage collector") \ 1314 \ 1315 product(bool, UseParallelGC, false, \ 1316 "Use the Parallel Scavenge garbage collector") \ 1317 \ 1318 product(bool, UseParallelOldGC, false, \ 1319 "Use the Parallel Old garbage collector") \ 1320 \ 1321 product(uintx, HeapMaximumCompactionInterval, 20, \ 1322 "How often should we maximally compact the heap (not allowing " \ 1323 "any dead space)") \ 1324 \ 1325 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1326 "The collection count for the first maximum compaction") \ 1327 \ 1328 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1329 "In the Parallel Old garbage collector maximum compaction for " \ 1330 "a system GC") \ 1331 \ 1332 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1333 "The mean used by the par compact dead wood" \ 1334 "limiter (a number between 0-100).") \ 1335 \ 1336 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1337 "The standard deviation used by the par compact dead wood" \ 1338 "limiter (a number between 0-100).") \ 1339 \ 1340 product(uintx, ParallelGCThreads, 0, \ 1341 "Number of parallel threads parallel gc will use") \ 1342 \ 1343 product(bool, UseDynamicNumberOfGCThreads, false, \ 1344 "Dynamically choose the number of parallel threads " \ 1345 "parallel gc will use") \ 1346 \ 1347 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1348 "Force dynamic selection of the number of" \ 1349 "parallel threads parallel gc will use to aid debugging") \ 1350 \ 1351 product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1352 "Size of heap (bytes) per GC thread used in calculating the " \ 1353 "number of GC threads") \ 1354 \ 1355 product(bool, TraceDynamicGCThreads, false, \ 1356 "Trace the dynamic GC thread usage") \ 1357 \ 1358 develop(bool, ParallelOldGCSplitALot, false, \ 1359 "Provoke splitting (copying data from a young gen space to" \ 1360 "multiple destination spaces)") \ 1361 \ 1362 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1363 "How often to provoke splitting a young gen space") \ 1364 \ 1365 product(uintx, ConcGCThreads, 0, \ 1366 "Number of threads concurrent gc will use") \ 1367 \ 1368 product(uintx, YoungPLABSize, 4096, \ 1369 "Size of young gen promotion labs (in HeapWords)") \ 1370 \ 1371 product(uintx, OldPLABSize, 1024, \ 1372 "Size of old gen promotion labs (in HeapWords)") \ 1373 \ 1374 product(uintx, GCTaskTimeStampEntries, 200, \ 1375 "Number of time stamp entries per gc worker thread") \ 1376 \ 1377 product(bool, AlwaysTenure, false, \ 1378 "Always tenure objects in eden. (ParallelGC only)") \ 1379 \ 1380 product(bool, NeverTenure, false, \ 1381 "Never tenure objects in eden, May tenure on overflow " \ 1382 "(ParallelGC only)") \ 1383 \ 1384 product(bool, ScavengeBeforeFullGC, true, \ 1385 "Scavenge youngest generation before each full GC, " \ 1386 "used with UseParallelGC") \ 1387 \ 1388 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1389 "Allow scavenges to occur when to_space contains objects.") \ 1390 \ 1391 product(bool, UseConcMarkSweepGC, false, \ 1392 "Use Concurrent Mark-Sweep GC in the old generation") \ 1393 \ 1394 product(bool, ExplicitGCInvokesConcurrent, false, \ 1395 "A System.gc() request invokes a concurrent collection;" \ 1396 " (effective only when UseConcMarkSweepGC)") \ 1397 \ 1398 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1399 "A System.gc() request invokes a concurrent collection and " \ 1400 "also unloads classes during such a concurrent gc cycle " \ 1401 "(effective only when UseConcMarkSweepGC)") \ 1402 \ 1403 product(bool, GCLockerInvokesConcurrent, false, \ 1404 "The exit of a JNI CS necessitating a scavenge also" \ 1405 " kicks off a bkgrd concurrent collection") \ 1406 \ 1407 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1408 "How much the GC can expand the eden by while the GC locker " \ 1409 "is active (as a percentage)") \ 1410 \ 1411 diagnostic(intx, GCLockerRetryAllocationCount, 2, \ 1412 "Number of times to retry allocations when" \ 1413 " blocked by the GC locker") \ 1414 \ 1415 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1416 "Use Adaptive Free Lists in the CMS generation") \ 1417 \ 1418 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1419 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1420 \ 1421 develop(bool, RotateCMSCollectionTypes, false, \ 1422 "Rotate the CMS collections among concurrent and STW") \ 1423 \ 1424 product(bool, UseCMSBestFit, true, \ 1425 "Use CMS best fit allocation strategy") \ 1426 \ 1427 product(bool, UseCMSCollectionPassing, true, \ 1428 "Use passing of collection from background to foreground") \ 1429 \ 1430 product(bool, UseParNewGC, false, \ 1431 "Use parallel threads in the new generation.") \ 1432 \ 1433 product(bool, ParallelGCVerbose, false, \ 1434 "Verbose output for parallel GC.") \ 1435 \ 1436 product(uintx, ParallelGCBufferWastePct, 10, \ 1437 "Wasted fraction of parallel allocation buffer.") \ 1438 \ 1439 diagnostic(bool, ParallelGCRetainPLAB, false, \ 1440 "Retain parallel allocation buffers across scavenges; " \ 1441 " -- disabled because this currently conflicts with " \ 1442 " parallel card scanning under certain conditions ") \ 1443 \ 1444 product(uintx, TargetPLABWastePct, 10, \ 1445 "Target wasted space in last buffer as percent of overall " \ 1446 "allocation") \ 1447 \ 1448 product(uintx, PLABWeight, 75, \ 1449 "Percentage (0-100) used to weight the current sample when" \ 1450 "computing exponentially decaying average for ResizePLAB.") \ 1451 \ 1452 product(bool, ResizePLAB, true, \ 1453 "Dynamically resize (survivor space) promotion labs") \ 1454 \ 1455 product(bool, PrintPLAB, false, \ 1456 "Print (survivor space) promotion labs sizing decisions") \ 1457 \ 1458 product(intx, ParGCArrayScanChunk, 50, \ 1459 "Scan a subset and push remainder, if array is bigger than this") \ 1460 \ 1461 product(bool, ParGCUseLocalOverflow, false, \ 1462 "Instead of a global overflow list, use local overflow stacks") \ 1463 \ 1464 product(bool, ParGCTrimOverflow, true, \ 1465 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1466 \ 1467 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1468 "Whether we should simulate work queue overflow in ParNew") \ 1469 \ 1470 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1471 "An `interval' counter that determines how frequently " \ 1472 "we simulate overflow; a smaller number increases frequency") \ 1473 \ 1474 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1475 "The desired number of objects to claim from the overflow list") \ 1476 \ 1477 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1478 "The number of strides per worker thread that we divide up the " \ 1479 "card table scanning work into") \ 1480 \ 1481 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1482 "The number of cards in each chunk of the parallel chunks used " \ 1483 "during card table scanning") \ 1484 \ 1485 product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1486 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1487 "parallel GC.") \ 1488 \ 1489 product(uintx, OldPLABWeight, 50, \ 1490 "Percentage (0-100) used to weight the current sample when" \ 1491 "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 1492 \ 1493 product(bool, ResizeOldPLAB, true, \ 1494 "Dynamically resize (old gen) promotion labs") \ 1495 \ 1496 product(bool, PrintOldPLAB, false, \ 1497 "Print (old gen) promotion labs sizing decisions") \ 1498 \ 1499 product(uintx, CMSOldPLABMin, 16, \ 1500 "Min size of CMS gen promotion lab caches per worker per blksize")\ 1501 \ 1502 product(uintx, CMSOldPLABMax, 1024, \ 1503 "Max size of CMS gen promotion lab caches per worker per blksize")\ 1504 \ 1505 product(uintx, CMSOldPLABNumRefills, 4, \ 1506 "Nominal number of refills of CMS gen promotion lab cache" \ 1507 " per worker per block size") \ 1508 \ 1509 product(bool, CMSOldPLABResizeQuicker, false, \ 1510 "Whether to react on-the-fly during a scavenge to a sudden" \ 1511 " change in block demand rate") \ 1512 \ 1513 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1514 "The tolerance of the phase-change detector for on-the-fly" \ 1515 " PLAB resizing during a scavenge") \ 1516 \ 1517 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1518 "The gain in the feedback loop for on-the-fly PLAB resizing" \ 1519 " during a scavenge") \ 1520 \ 1521 product(bool, AlwaysPreTouch, false, \ 1522 "It forces all freshly committed pages to be pre-touched.") \ 1523 \ 1524 product_pd(uintx, CMSYoungGenPerWorker, \ 1525 "The maximum size of young gen chosen by default per GC worker " \ 1526 "thread available") \ 1527 \ 1528 product(bool, CMSIncrementalMode, false, \ 1529 "Whether CMS GC should operate in \"incremental\" mode") \ 1530 \ 1531 product(uintx, CMSIncrementalDutyCycle, 10, \ 1532 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1533 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1534 "value") \ 1535 \ 1536 product(bool, CMSIncrementalPacing, true, \ 1537 "Whether the CMS incremental mode duty cycle should be " \ 1538 "automatically adjusted") \ 1539 \ 1540 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1541 "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1542 "enabled (a percentage, 0-100)") \ 1543 \ 1544 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1545 "Percentage (0-100) used to add conservatism when computing the " \ 1546 "duty cycle") \ 1547 \ 1548 product(uintx, CMSIncrementalOffset, 0, \ 1549 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1550 " is shifted to the right within the period between young GCs") \ 1551 \ 1552 product(uintx, CMSExpAvgFactor, 50, \ 1553 "Percentage (0-100) used to weight the current sample when" \ 1554 "computing exponential averages for CMS statistics.") \ 1555 \ 1556 product(uintx, CMS_FLSWeight, 75, \ 1557 "Percentage (0-100) used to weight the current sample when" \ 1558 "computing exponentially decating averages for CMS FLS statistics.") \ 1559 \ 1560 product(uintx, CMS_FLSPadding, 1, \ 1561 "The multiple of deviation from mean to use for buffering" \ 1562 "against volatility in free list demand.") \ 1563 \ 1564 product(uintx, FLSCoalescePolicy, 2, \ 1565 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1566 \ 1567 product(bool, FLSAlwaysCoalesceLarge, false, \ 1568 "CMS: Larger free blocks are always available for coalescing") \ 1569 \ 1570 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1571 "CMS: the smaller the percentage the greater the coalition force")\ 1572 \ 1573 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1574 "CMS: the factor by which to inflate estimated demand of small" \ 1575 " block sizes to prevent coalescing with an adjoining block") \ 1576 \ 1577 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1578 "CMS: the factor by which to inflate estimated demand of large" \ 1579 " block sizes to prevent coalescing with an adjoining block") \ 1580 \ 1581 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1582 "CMS: the factor by which to inflate estimated demand of small" \ 1583 " block sizes to prevent splitting to supply demand for smaller" \ 1584 " blocks") \ 1585 \ 1586 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1587 "CMS: the factor by which to inflate estimated demand of large" \ 1588 " block sizes to prevent splitting to supply demand for smaller" \ 1589 " blocks") \ 1590 \ 1591 product(bool, CMSExtrapolateSweep, false, \ 1592 "CMS: cushion for block demand during sweep") \ 1593 \ 1594 product(uintx, CMS_SweepWeight, 75, \ 1595 "Percentage (0-100) used to weight the current sample when " \ 1596 "computing exponentially decaying average for inter-sweep " \ 1597 "duration") \ 1598 \ 1599 product(uintx, CMS_SweepPadding, 1, \ 1600 "The multiple of deviation from mean to use for buffering " \ 1601 "against volatility in inter-sweep duration.") \ 1602 \ 1603 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1604 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1605 "duration exceeds this threhold in milliseconds") \ 1606 \ 1607 develop(bool, CMSTraceIncrementalMode, false, \ 1608 "Trace CMS incremental mode") \ 1609 \ 1610 develop(bool, CMSTraceIncrementalPacing, false, \ 1611 "Trace CMS incremental mode pacing computation") \ 1612 \ 1613 develop(bool, CMSTraceThreadState, false, \ 1614 "Trace the CMS thread state (enable the trace_state() method)") \ 1615 \ 1616 product(bool, CMSClassUnloadingEnabled, true, \ 1617 "Whether class unloading enabled when using CMS GC") \ 1618 \ 1619 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1620 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1621 " for which classes may not be unloaded") \ 1622 \ 1623 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1624 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1625 \ 1626 product(bool, UseCMSCompactAtFullCollection, true, \ 1627 "Use mark sweep compact at full collections") \ 1628 \ 1629 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1630 "Number of CMS full collection done before compaction if > 0") \ 1631 \ 1632 develop(intx, CMSDictionaryChoice, 0, \ 1633 "Use BinaryTreeDictionary as default in the CMS generation") \ 1634 \ 1635 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1636 "Replenish an indexed free list with this number of chunks") \ 1637 \ 1638 product(bool, CMSReplenishIntermediate, true, \ 1639 "Replenish all intermediate free-list caches") \ 1640 \ 1641 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1642 "When satisfying batched demand, split blocks from the " \ 1643 "IndexedFreeList whose size is a multiple of requested size") \ 1644 \ 1645 product(bool, CMSLoopWarn, false, \ 1646 "Warn in case of excessive CMS looping") \ 1647 \ 1648 develop(bool, CMSOverflowEarlyRestoration, false, \ 1649 "Whether preserved marks should be restored early") \ 1650 \ 1651 product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1652 "Size of marking stack") \ 1653 \ 1654 product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1655 "Max size of marking stack") \ 1656 \ 1657 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1658 "Whether we should simulate frequent marking stack / work queue" \ 1659 " overflow") \ 1660 \ 1661 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1662 "An `interval' counter that determines how frequently" \ 1663 " we simulate overflow; a smaller number increases frequency") \ 1664 \ 1665 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1666 "(Temporary, subject to experimentation)" \ 1667 "Maximum number of abortable preclean iterations, if > 0") \ 1668 \ 1669 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1670 "(Temporary, subject to experimentation)" \ 1671 "Maximum time in abortable preclean in ms") \ 1672 \ 1673 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1674 "(Temporary, subject to experimentation)" \ 1675 "Nominal minimum work per abortable preclean iteration") \ 1676 \ 1677 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1678 "(Temporary, subject to experimentation)" \ 1679 " Time that we sleep between iterations when not given" \ 1680 " enough work per iteration") \ 1681 \ 1682 product(uintx, CMSRescanMultiple, 32, \ 1683 "Size (in cards) of CMS parallel rescan task") \ 1684 \ 1685 product(uintx, CMSConcMarkMultiple, 32, \ 1686 "Size (in cards) of CMS concurrent MT marking task") \ 1687 \ 1688 product(bool, CMSAbortSemantics, false, \ 1689 "Whether abort-on-overflow semantics is implemented") \ 1690 \ 1691 product(bool, CMSParallelInitialMarkEnabled, true, \ 1692 "Use the parallel initial mark.") \ 1693 \ 1694 product(bool, CMSParallelRemarkEnabled, true, \ 1695 "Whether parallel remark enabled (only if ParNewGC)") \ 1696 \ 1697 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1698 "Whether parallel remark of survivor space" \ 1699 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1700 \ 1701 product(bool, CMSPLABRecordAlways, true, \ 1702 "Whether to always record survivor space PLAB bdries" \ 1703 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1704 \ 1705 product(bool, CMSEdenChunksRecordAlways, true, \ 1706 "Whether to always record eden chunks used for " \ 1707 "the parallel initial mark or remark of eden" ) \ 1708 \ 1709 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1710 "Print the eden and the survivor chunks used for the parallel " \ 1711 "initial mark or remark of the eden/survivor spaces") \ 1712 \ 1713 product(bool, CMSConcurrentMTEnabled, true, \ 1714 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1715 \ 1716 product(bool, CMSPrecleaningEnabled, true, \ 1717 "Whether concurrent precleaning enabled") \ 1718 \ 1719 product(uintx, CMSPrecleanIter, 3, \ 1720 "Maximum number of precleaning iteration passes") \ 1721 \ 1722 product(uintx, CMSPrecleanNumerator, 2, \ 1723 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1724 " ratio") \ 1725 \ 1726 product(uintx, CMSPrecleanDenominator, 3, \ 1727 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1728 " ratio") \ 1729 \ 1730 product(bool, CMSPrecleanRefLists1, true, \ 1731 "Preclean ref lists during (initial) preclean phase") \ 1732 \ 1733 product(bool, CMSPrecleanRefLists2, false, \ 1734 "Preclean ref lists during abortable preclean phase") \ 1735 \ 1736 product(bool, CMSPrecleanSurvivors1, false, \ 1737 "Preclean survivors during (initial) preclean phase") \ 1738 \ 1739 product(bool, CMSPrecleanSurvivors2, true, \ 1740 "Preclean survivors during abortable preclean phase") \ 1741 \ 1742 product(uintx, CMSPrecleanThreshold, 1000, \ 1743 "Don't re-iterate if #dirty cards less than this") \ 1744 \ 1745 product(bool, CMSCleanOnEnter, true, \ 1746 "Clean-on-enter optimization for reducing number of dirty cards") \ 1747 \ 1748 product(uintx, CMSRemarkVerifyVariant, 1, \ 1749 "Choose variant (1,2) of verification following remark") \ 1750 \ 1751 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1752 "If Eden used is below this value, don't try to schedule remark") \ 1753 \ 1754 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1755 "The Eden occupancy % at which to try and schedule remark pause") \ 1756 \ 1757 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1758 "Start sampling Eden top at least before yg occupancy reaches" \ 1759 " 1/<ratio> of the size at which we plan to schedule remark") \ 1760 \ 1761 product(uintx, CMSSamplingGrain, 16*K, \ 1762 "The minimum distance between eden samples for CMS (see above)") \ 1763 \ 1764 product(bool, CMSScavengeBeforeRemark, false, \ 1765 "Attempt scavenge before the CMS remark step") \ 1766 \ 1767 develop(bool, CMSTraceSweeper, false, \ 1768 "Trace some actions of the CMS sweeper") \ 1769 \ 1770 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1771 "Don't drain below this size per parallel worker/thief") \ 1772 \ 1773 manageable(intx, CMSWaitDuration, 2000, \ 1774 "Time in milliseconds that CMS thread waits for young GC") \ 1775 \ 1776 develop(uintx, CMSCheckInterval, 1000, \ 1777 "Interval in milliseconds that CMS thread checks if it " \ 1778 "should start a collection cycle") \ 1779 \ 1780 product(bool, CMSYield, true, \ 1781 "Yield between steps of concurrent mark & sweep") \ 1782 \ 1783 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1784 "Bitmap operations should process at most this many bits" \ 1785 "between yields") \ 1786 \ 1787 product(bool, CMSDumpAtPromotionFailure, false, \ 1788 "Dump useful information about the state of the CMS old " \ 1789 " generation upon a promotion failure.") \ 1790 \ 1791 product(bool, CMSPrintChunksInDump, false, \ 1792 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1793 " more detailed information about the free chunks.") \ 1794 \ 1795 product(bool, CMSPrintObjectsInDump, false, \ 1796 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1797 " more detailed information about the allocated objects.") \ 1798 \ 1799 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1800 "Verify that all refs across the FLS boundary " \ 1801 " are to valid objects") \ 1802 \ 1803 diagnostic(bool, FLSVerifyLists, false, \ 1804 "Do lots of (expensive) FreeListSpace verification") \ 1805 \ 1806 diagnostic(bool, FLSVerifyIndexTable, false, \ 1807 "Do lots of (expensive) FLS index table verification") \ 1808 \ 1809 develop(bool, FLSVerifyDictionary, false, \ 1810 "Do lots of (expensive) FLS dictionary verification") \ 1811 \ 1812 develop(bool, VerifyBlockOffsetArray, false, \ 1813 "Do (expensive!) block offset array verification") \ 1814 \ 1815 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1816 "Maintain _unallocated_block in BlockOffsetArray" \ 1817 " (currently applicable only to CMS collector)") \ 1818 \ 1819 develop(bool, TraceCMSState, false, \ 1820 "Trace the state of the CMS collection") \ 1821 \ 1822 product(intx, RefDiscoveryPolicy, 0, \ 1823 "Whether reference-based(0) or referent-based(1)") \ 1824 \ 1825 product(bool, ParallelRefProcEnabled, false, \ 1826 "Enable parallel reference processing whenever possible") \ 1827 \ 1828 product(bool, ParallelRefProcBalancingEnabled, true, \ 1829 "Enable balancing of reference processing queues") \ 1830 \ 1831 product(uintx, CMSTriggerRatio, 80, \ 1832 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1833 "allocated before a CMS collection cycle commences") \ 1834 \ 1835 product(uintx, CMSBootstrapOccupancy, 50, \ 1836 "Percentage CMS generation occupancy at which to " \ 1837 "initiate CMS collection for bootstrapping collection stats") \ 1838 \ 1839 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1840 "Percentage CMS generation occupancy to start a CMS collection " \ 1841 "cycle. A negative value means that CMSTriggerRatio is used") \ 1842 \ 1843 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1844 "Percentage of the (entire) heap occupancy to start a " \ 1845 "concurrent GC cycle. It is used by GCs that trigger a " \ 1846 "concurrent GC cycle based on the occupancy of the entire heap, " \ 1847 "not just one of the generations (e.g., G1). A value of 0 " \ 1848 "denotes 'do constant GC cycles'.") \ 1849 \ 1850 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1851 "Only use occupancy as a crierion for starting a CMS collection") \ 1852 \ 1853 product(uintx, CMSIsTooFullPercentage, 98, \ 1854 "An absolute ceiling above which CMS will always consider the " \ 1855 "unloading of classes when class unloading is enabled") \ 1856 \ 1857 develop(bool, CMSTestInFreeList, false, \ 1858 "Check if the coalesced range is already in the " \ 1859 "free lists as claimed") \ 1860 \ 1861 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1862 "Check that all the garbage collected was returned to the " \ 1863 "free lists.") \ 1864 \ 1865 notproduct(bool, ScavengeALot, false, \ 1866 "Force scavenge at every Nth exit from the runtime system " \ 1867 "(N=ScavengeALotInterval)") \ 1868 \ 1869 develop(bool, FullGCALot, false, \ 1870 "Force full gc at every Nth exit from the runtime system " \ 1871 "(N=FullGCALotInterval)") \ 1872 \ 1873 notproduct(bool, GCALotAtAllSafepoints, false, \ 1874 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1875 \ 1876 product(bool, PrintPromotionFailure, false, \ 1877 "Print additional diagnostic information following " \ 1878 " promotion failure") \ 1879 \ 1880 notproduct(bool, PromotionFailureALot, false, \ 1881 "Use promotion failure handling on every youngest generation " \ 1882 "collection") \ 1883 \ 1884 develop(uintx, PromotionFailureALotCount, 1000, \ 1885 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1886 "refill attempts (ParNew) or promotion attempts " \ 1887 "(other young collectors) ") \ 1888 \ 1889 develop(uintx, PromotionFailureALotInterval, 5, \ 1890 "Total collections between promotion failures alot") \ 1891 \ 1892 experimental(uintx, WorkStealingSleepMillis, 1, \ 1893 "Sleep time when sleep is used for yields") \ 1894 \ 1895 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1896 "Number of yields before a sleep is done during workstealing") \ 1897 \ 1898 experimental(uintx, WorkStealingHardSpins, 4096, \ 1899 "Number of iterations in a spin loop between checks on " \ 1900 "time out of hard spin") \ 1901 \ 1902 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1903 "Ratio of hard spins to calls to yield") \ 1904 \ 1905 develop(uintx, ObjArrayMarkingStride, 512, \ 1906 "Number of ObjArray elements to push onto the marking stack" \ 1907 "before pushing a continuation entry") \ 1908 \ 1909 develop(bool, MetadataAllocationFailALot, false, \ 1910 "Fail metadata allocations at intervals controlled by " \ 1911 "MetadataAllocationFailALotInterval") \ 1912 \ 1913 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1914 "metadata allocation failure alot interval") \ 1915 \ 1916 develop(bool, MetaDataDeallocateALot, false, \ 1917 "Deallocation bunches of metadata at intervals controlled by " \ 1918 "MetaDataAllocateALotInterval") \ 1919 \ 1920 develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1921 "Metadata deallocation alot interval") \ 1922 \ 1923 develop(bool, TraceMetadataChunkAllocation, false, \ 1924 "Trace chunk metadata allocations") \ 1925 \ 1926 product(bool, TraceMetadataHumongousAllocation, false, \ 1927 "Trace humongous metadata allocations") \ 1928 \ 1929 develop(bool, TraceMetavirtualspaceAllocation, false, \ 1930 "Trace virtual space metadata allocations") \ 1931 \ 1932 notproduct(bool, ExecuteInternalVMTests, false, \ 1933 "Enable execution of internal VM tests.") \ 1934 \ 1935 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1936 \ 1937 product_pd(bool, ResizeTLAB, \ 1938 "Dynamically resize tlab size for threads") \ 1939 \ 1940 product(bool, ZeroTLAB, false, \ 1941 "Zero out the newly created TLAB") \ 1942 \ 1943 product(bool, FastTLABRefill, true, \ 1944 "Use fast TLAB refill code") \ 1945 \ 1946 product(bool, PrintTLAB, false, \ 1947 "Print various TLAB related information") \ 1948 \ 1949 product(bool, TLABStats, true, \ 1950 "Print various TLAB related information") \ 1951 \ 1952 EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1953 "Enable LowMemoryProtection")) \ 1954 \ 1955 product_pd(bool, NeverActAsServerClassMachine, \ 1956 "Never act like a server-class machine") \ 1957 \ 1958 product(bool, AlwaysActAsServerClassMachine, false, \ 1959 "Always act like a server-class machine") \ 1960 \ 1961 product_pd(uint64_t, MaxRAM, \ 1962 "Real memory size (in bytes) used to set maximum heap size") \ 1963 \ 1964 product(uintx, ErgoHeapSizeLimit, 0, \ 1965 "Maximum ergonomically set heap size (in bytes); zero means use " \ 1966 "MaxRAM / MaxRAMFraction") \ 1967 \ 1968 product(uintx, MaxRAMFraction, 4, \ 1969 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1970 "size") \ 1971 \ 1972 product(uintx, DefaultMaxRAMFraction, 4, \ 1973 "Maximum fraction (1/n) of real memory used for maximum heap " \ 1974 "size; deprecated: to be renamed to MaxRAMFraction") \ 1975 \ 1976 product(uintx, MinRAMFraction, 2, \ 1977 "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 1978 "size on systems with small physical memory size") \ 1979 \ 1980 product(uintx, InitialRAMFraction, 64, \ 1981 "Fraction (1/n) of real memory used for initial heap size") \ 1982 \ 1983 develop(uintx, MaxVirtMemFraction, 2, \ 1984 "Maximum fraction (1/n) of virtual memory used for ergonomically" \ 1985 "determining maximum heap size") \ 1986 \ 1987 product(bool, UseAutoGCSelectPolicy, false, \ 1988 "Use automatic collection selection policy") \ 1989 \ 1990 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1991 "Automatic GC selection pause threshhold in ms") \ 1992 \ 1993 product(bool, UseAdaptiveSizePolicy, true, \ 1994 "Use adaptive generation sizing policies") \ 1995 \ 1996 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1997 "Use adaptive survivor sizing policies") \ 1998 \ 1999 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2000 "Use adaptive young-old sizing policies at minor collections") \ 2001 \ 2002 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2003 "Use adaptive young-old sizing policies at major collections") \ 2004 \ 2005 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2006 "Use statistics from System.GC for adaptive size policy") \ 2007 \ 2008 product(bool, UseAdaptiveGCBoundary, false, \ 2009 "Allow young-old boundary to move") \ 2010 \ 2011 develop(bool, TraceAdaptiveGCBoundary, false, \ 2012 "Trace young-old boundary moves") \ 2013 \ 2014 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2015 "Resize the virtual spaces of the young or old generations") \ 2016 \ 2017 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2018 "Policy for changeing generation size for throughput goals") \ 2019 \ 2020 product(uintx, AdaptiveSizePausePolicy, 0, \ 2021 "Policy for changing generation size for pause goals") \ 2022 \ 2023 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2024 "Adjust tenured generation to achive a minor pause goal") \ 2025 \ 2026 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2027 "Adjust young generation to achive a major pause goal") \ 2028 \ 2029 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2030 "Number of steps where heuristics is used before data is used") \ 2031 \ 2032 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2033 "Number of collections before the adaptive sizing is started") \ 2034 \ 2035 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2036 "Collection interval for printing information; zero means never") \ 2037 \ 2038 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2039 "Use adaptive minimum footprint as a goal") \ 2040 \ 2041 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2042 "Weight given to exponential resizing, between 0 and 100") \ 2043 \ 2044 product(uintx, AdaptiveTimeWeight, 25, \ 2045 "Weight given to time in adaptive policy, between 0 and 100") \ 2046 \ 2047 product(uintx, PausePadding, 1, \ 2048 "How much buffer to keep for pause time") \ 2049 \ 2050 product(uintx, PromotedPadding, 3, \ 2051 "How much buffer to keep for promotion failure") \ 2052 \ 2053 product(uintx, SurvivorPadding, 3, \ 2054 "How much buffer to keep for survivor overflow") \ 2055 \ 2056 product(uintx, ThresholdTolerance, 10, \ 2057 "Allowed collection cost difference between generations") \ 2058 \ 2059 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2060 "If collection costs are within margin, reduce both by full " \ 2061 "delta") \ 2062 \ 2063 product(uintx, YoungGenerationSizeIncrement, 20, \ 2064 "Adaptive size percentage change in young generation") \ 2065 \ 2066 product(uintx, YoungGenerationSizeSupplement, 80, \ 2067 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2068 \ 2069 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2070 "Decay factor to YoungedGenerationSizeSupplement") \ 2071 \ 2072 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2073 "Adaptive size percentage change in tenured generation") \ 2074 \ 2075 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2076 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2077 \ 2078 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2079 "Decay factor to TenuredGenerationSizeIncrement") \ 2080 \ 2081 product(uintx, MaxGCPauseMillis, max_uintx, \ 2082 "Adaptive size policy maximum GC pause time goal in msec, " \ 2083 "or (G1 Only) the max. GC time per MMU time slice") \ 2084 \ 2085 product(uintx, GCPauseIntervalMillis, 0, \ 2086 "Time slice for MMU specification") \ 2087 \ 2088 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2089 "Adaptive size policy maximum GC minor pause time goal in msec") \ 2090 \ 2091 product(uintx, GCTimeRatio, 99, \ 2092 "Adaptive size policy application time to GC time ratio") \ 2093 \ 2094 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2095 "Adaptive size scale down factor for shrinking") \ 2096 \ 2097 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2098 "Adaptive size decays the major cost for long major intervals") \ 2099 \ 2100 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2101 "Time scale over which major costs decay") \ 2102 \ 2103 product(uintx, MinSurvivorRatio, 3, \ 2104 "Minimum ratio of young generation/survivor space size") \ 2105 \ 2106 product(uintx, InitialSurvivorRatio, 8, \ 2107 "Initial ratio of eden/survivor space size") \ 2108 \ 2109 product(uintx, BaseFootPrintEstimate, 256*M, \ 2110 "Estimate of footprint other than Java Heap") \ 2111 \ 2112 product(bool, UseGCOverheadLimit, true, \ 2113 "Use policy to limit of proportion of time spent in GC " \ 2114 "before an OutOfMemory error is thrown") \ 2115 \ 2116 product(uintx, GCTimeLimit, 98, \ 2117 "Limit of proportion of time spent in GC before an OutOfMemory" \ 2118 "error is thrown (used with GCHeapFreeLimit)") \ 2119 \ 2120 product(uintx, GCHeapFreeLimit, 2, \ 2121 "Minimum percentage of free space after a full GC before an " \ 2122 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2123 \ 2124 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2125 "Number of consecutive collections before gc time limit fires") \ 2126 \ 2127 product(bool, PrintAdaptiveSizePolicy, false, \ 2128 "Print information about AdaptiveSizePolicy") \ 2129 \ 2130 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2131 "How far ahead to prefetch destination area (<= 0 means off)") \ 2132 \ 2133 product(intx, PrefetchScanIntervalInBytes, -1, \ 2134 "How far ahead to prefetch scan area (<= 0 means off)") \ 2135 \ 2136 product(intx, PrefetchFieldsAhead, -1, \ 2137 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2138 \ 2139 diagnostic(bool, VerifySilently, false, \ 2140 "Don't print print the verification progress") \ 2141 \ 2142 diagnostic(bool, VerifyDuringStartup, false, \ 2143 "Verify memory system before executing any Java code " \ 2144 "during VM initialization") \ 2145 \ 2146 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2147 "Verify system before exiting") \ 2148 \ 2149 diagnostic(bool, VerifyBeforeGC, false, \ 2150 "Verify memory system before GC") \ 2151 \ 2152 diagnostic(bool, VerifyAfterGC, false, \ 2153 "Verify memory system after GC") \ 2154 \ 2155 diagnostic(bool, VerifyDuringGC, false, \ 2156 "Verify memory system during GC (between phases)") \ 2157 \ 2158 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2159 "Enable parallel memory system verification") \ 2160 \ 2161 diagnostic(bool, DeferInitialCardMark, false, \ 2162 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2163 "may arise from new_pre_store_barrier") \ 2164 \ 2165 diagnostic(bool, VerifyRememberedSets, false, \ 2166 "Verify GC remembered sets") \ 2167 \ 2168 diagnostic(bool, VerifyObjectStartArray, true, \ 2169 "Verify GC object start array if verify before/after") \ 2170 \ 2171 product(bool, DisableExplicitGC, false, \ 2172 "Tells whether calling System.gc() does a full GC") \ 2173 \ 2174 notproduct(bool, CheckMemoryInitialization, false, \ 2175 "Checks memory initialization") \ 2176 \ 2177 product(bool, CollectGen0First, false, \ 2178 "Collect youngest generation before each full GC") \ 2179 \ 2180 diagnostic(bool, BindCMSThreadToCPU, false, \ 2181 "Bind CMS Thread to CPU if possible") \ 2182 \ 2183 diagnostic(uintx, CPUForCMSThread, 0, \ 2184 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2185 \ 2186 product(bool, BindGCTaskThreadsToCPUs, false, \ 2187 "Bind GCTaskThreads to CPUs if possible") \ 2188 \ 2189 product(bool, UseGCTaskAffinity, false, \ 2190 "Use worker affinity when asking for GCTasks") \ 2191 \ 2192 product(uintx, ProcessDistributionStride, 4, \ 2193 "Stride through processors when distributing processes") \ 2194 \ 2195 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2196 "number of times the coordinator GC thread will sleep while " \ 2197 "yielding before giving up and resuming GC") \ 2198 \ 2199 product(uintx, CMSYieldSleepCount, 0, \ 2200 "number of times a GC thread (minus the coordinator) " \ 2201 "will sleep while yielding before giving up and resuming GC") \ 2202 \ 2203 /* gc tracing */ \ 2204 manageable(bool, PrintGC, false, \ 2205 "Print message at garbage collect") \ 2206 \ 2207 manageable(bool, PrintGCDetails, false, \ 2208 "Print more details at garbage collect") \ 2209 \ 2210 manageable(bool, PrintGCDateStamps, false, \ 2211 "Print date stamps at garbage collect") \ 2212 \ 2213 manageable(bool, PrintGCTimeStamps, false, \ 2214 "Print timestamps at garbage collect") \ 2215 \ 2216 product(bool, PrintGCTaskTimeStamps, false, \ 2217 "Print timestamps for individual gc worker thread tasks") \ 2218 \ 2219 develop(intx, ConcGCYieldTimeout, 0, \ 2220 "If non-zero, assert that GC threads yield within this # of ms.") \ 2221 \ 2222 notproduct(bool, TraceMarkSweep, false, \ 2223 "Trace mark sweep") \ 2224 \ 2225 product(bool, PrintReferenceGC, false, \ 2226 "Print times spent handling reference objects during GC " \ 2227 " (enabled only when PrintGCDetails)") \ 2228 \ 2229 develop(bool, TraceReferenceGC, false, \ 2230 "Trace handling of soft/weak/final/phantom references") \ 2231 \ 2232 develop(bool, TraceFinalizerRegistration, false, \ 2233 "Trace registration of final references") \ 2234 \ 2235 notproduct(bool, TraceScavenge, false, \ 2236 "Trace scavenge") \ 2237 \ 2238 product_rw(bool, TraceClassLoading, false, \ 2239 "Trace all classes loaded") \ 2240 \ 2241 product(bool, TraceClassLoadingPreorder, false, \ 2242 "Trace all classes loaded in order referenced (not loaded)") \ 2243 \ 2244 product_rw(bool, TraceClassUnloading, false, \ 2245 "Trace unloading of classes") \ 2246 \ 2247 product_rw(bool, TraceLoaderConstraints, false, \ 2248 "Trace loader constraints") \ 2249 \ 2250 develop(bool, TraceClassLoaderData, false, \ 2251 "Trace class loader loader_data lifetime") \ 2252 \ 2253 product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2254 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2255 "Initial size of the boot class loader data metaspace") \ 2256 \ 2257 product(bool, TraceGen0Time, false, \ 2258 "Trace accumulated time for Gen 0 collection") \ 2259 \ 2260 product(bool, TraceGen1Time, false, \ 2261 "Trace accumulated time for Gen 1 collection") \ 2262 \ 2263 product(bool, PrintTenuringDistribution, false, \ 2264 "Print tenuring age information") \ 2265 \ 2266 product_rw(bool, PrintHeapAtGC, false, \ 2267 "Print heap layout before and after each GC") \ 2268 \ 2269 product_rw(bool, PrintHeapAtGCExtended, false, \ 2270 "Prints extended information about the layout of the heap " \ 2271 "when -XX:+PrintHeapAtGC is set") \ 2272 \ 2273 product(bool, PrintHeapAtSIGBREAK, true, \ 2274 "Print heap layout in response to SIGBREAK") \ 2275 \ 2276 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2277 "Print a class histogram before any major stop-world GC") \ 2278 \ 2279 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2280 "Print a class histogram after any major stop-world GC") \ 2281 \ 2282 manageable(bool, PrintClassHistogram, false, \ 2283 "Print a histogram of class instances") \ 2284 \ 2285 develop(bool, TraceWorkGang, false, \ 2286 "Trace activities of work gangs") \ 2287 \ 2288 product(bool, TraceParallelOldGCTasks, false, \ 2289 "Trace multithreaded GC activity") \ 2290 \ 2291 develop(bool, TraceBlockOffsetTable, false, \ 2292 "Print BlockOffsetTable maps") \ 2293 \ 2294 develop(bool, TraceCardTableModRefBS, false, \ 2295 "Print CardTableModRefBS maps") \ 2296 \ 2297 develop(bool, TraceGCTaskManager, false, \ 2298 "Trace actions of the GC task manager") \ 2299 \ 2300 develop(bool, TraceGCTaskQueue, false, \ 2301 "Trace actions of the GC task queues") \ 2302 \ 2303 diagnostic(bool, TraceGCTaskThread, false, \ 2304 "Trace actions of the GC task threads") \ 2305 \ 2306 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2307 "Print the time taken by each parallel old gc phase." \ 2308 "PrintGCDetails must also be enabled.") \ 2309 \ 2310 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2311 "Trace parallel old gc marking phase") \ 2312 \ 2313 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2314 "Trace parallel old gc summary phase") \ 2315 \ 2316 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2317 "Trace parallel old gc compaction phase") \ 2318 \ 2319 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2320 "Trace parallel old gc dense prefix computation") \ 2321 \ 2322 develop(bool, IgnoreLibthreadGPFault, false, \ 2323 "Suppress workaround for libthread GP fault") \ 2324 \ 2325 product(bool, PrintJNIGCStalls, false, \ 2326 "Print diagnostic message when GC is stalled" \ 2327 "by JNI critical section") \ 2328 \ 2329 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2330 "The percentage of the used heap that the instances of a class " \ 2331 "must occupy for the class to generate a trace event.") \ 2332 \ 2333 /* GC log rotation setting */ \ 2334 \ 2335 product(bool, UseGCLogFileRotation, false, \ 2336 "Prevent large gclog file for long running app. " \ 2337 "Requires -Xloggc:<filename>") \ 2338 \ 2339 product(uintx, NumberOfGCLogFiles, 0, \ 2340 "Number of gclog files in rotation, " \ 2341 "Default: 0, no rotation") \ 2342 \ 2343 product(uintx, GCLogFileSize, 0, \ 2344 "GC log file size, Default: 0 bytes, no rotation " \ 2345 "Only valid with UseGCLogFileRotation") \ 2346 \ 2347 /* JVMTI heap profiling */ \ 2348 \ 2349 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2350 "Trace JVMTI object tagging calls") \ 2351 \ 2352 diagnostic(bool, VerifyBeforeIteration, false, \ 2353 "Verify memory system before JVMTI iteration") \ 2354 \ 2355 /* compiler interface */ \ 2356 \ 2357 develop(bool, CIPrintCompilerName, false, \ 2358 "when CIPrint is active, print the name of the active compiler") \ 2359 \ 2360 develop(bool, CIPrintCompileQueue, false, \ 2361 "display the contents of the compile queue whenever a " \ 2362 "compilation is enqueued") \ 2363 \ 2364 develop(bool, CIPrintRequests, false, \ 2365 "display every request for compilation") \ 2366 \ 2367 product(bool, CITime, false, \ 2368 "collect timing information for compilation") \ 2369 \ 2370 develop(bool, CITimeEach, false, \ 2371 "display timing information after each successful compilation") \ 2372 \ 2373 develop(bool, CICountOSR, false, \ 2374 "use a separate counter when assigning ids to osr compilations") \ 2375 \ 2376 develop(bool, CICompileNatives, true, \ 2377 "compile native methods if supported by the compiler") \ 2378 \ 2379 develop_pd(bool, CICompileOSR, \ 2380 "compile on stack replacement methods if supported by the " \ 2381 "compiler") \ 2382 \ 2383 develop(bool, CIPrintMethodCodes, false, \ 2384 "print method bytecodes of the compiled code") \ 2385 \ 2386 develop(bool, CIPrintTypeFlow, false, \ 2387 "print the results of ciTypeFlow analysis") \ 2388 \ 2389 develop(bool, CITraceTypeFlow, false, \ 2390 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2391 \ 2392 develop(intx, OSROnlyBCI, -1, \ 2393 "OSR only at this bci. Negative values mean exclude that bci") \ 2394 \ 2395 /* compiler */ \ 2396 \ 2397 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2398 "Number of compiler threads to run") \ 2399 \ 2400 product(intx, CompilationPolicyChoice, 0, \ 2401 "which compilation policy (0/1)") \ 2402 \ 2403 develop(bool, UseStackBanging, true, \ 2404 "use stack banging for stack overflow checks (required for " \ 2405 "proper StackOverflow handling; disable only to measure cost " \ 2406 "of stackbanging)") \ 2407 \ 2408 develop(bool, UseStrictFP, true, \ 2409 "use strict fp if modifier strictfp is set") \ 2410 \ 2411 develop(bool, GenerateSynchronizationCode, true, \ 2412 "generate locking/unlocking code for synchronized methods and " \ 2413 "monitors") \ 2414 \ 2415 develop(bool, GenerateCompilerNullChecks, true, \ 2416 "Generate explicit null checks for loads/stores/calls") \ 2417 \ 2418 develop(bool, GenerateRangeChecks, true, \ 2419 "Generate range checks for array accesses") \ 2420 \ 2421 develop_pd(bool, ImplicitNullChecks, \ 2422 "generate code for implicit null checks") \ 2423 \ 2424 product(bool, PrintSafepointStatistics, false, \ 2425 "print statistics about safepoint synchronization") \ 2426 \ 2427 product(intx, PrintSafepointStatisticsCount, 300, \ 2428 "total number of safepoint statistics collected " \ 2429 "before printing them out") \ 2430 \ 2431 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2432 "print safepoint statistics only when safepoint takes" \ 2433 " more than PrintSafepointSatisticsTimeout in millis") \ 2434 \ 2435 product(bool, TraceSafepointCleanupTime, false, \ 2436 "print the break down of clean up tasks performed during" \ 2437 " safepoint") \ 2438 \ 2439 product(bool, Inline, true, \ 2440 "enable inlining") \ 2441 \ 2442 product(bool, ClipInlining, true, \ 2443 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2444 \ 2445 develop(bool, UseCHA, true, \ 2446 "enable CHA") \ 2447 \ 2448 product(bool, UseTypeProfile, true, \ 2449 "Check interpreter profile for historically monomorphic calls") \ 2450 \ 2451 notproduct(bool, TimeCompiler, false, \ 2452 "time the compiler") \ 2453 \ 2454 diagnostic(bool, PrintInlining, false, \ 2455 "prints inlining optimizations") \ 2456 \ 2457 product(bool, UsePopCountInstruction, false, \ 2458 "Use population count instruction") \ 2459 \ 2460 develop(bool, EagerInitialization, false, \ 2461 "Eagerly initialize classes if possible") \ 2462 \ 2463 develop(bool, TraceMethodReplacement, false, \ 2464 "Print when methods are replaced do to recompilation") \ 2465 \ 2466 develop(bool, PrintMethodFlushing, false, \ 2467 "print the nmethods being flushed") \ 2468 \ 2469 develop(bool, UseRelocIndex, false, \ 2470 "use an index to speed random access to relocations") \ 2471 \ 2472 develop(bool, StressCodeBuffers, false, \ 2473 "Exercise code buffer expansion and other rare state changes") \ 2474 \ 2475 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2476 "Generate extra debugging info for non-safepoints in nmethods") \ 2477 \ 2478 product(bool, PrintVMOptions, false, \ 2479 "Print flags that appeared on the command line") \ 2480 \ 2481 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2482 "Ignore unrecognized VM options") \ 2483 \ 2484 product(bool, PrintCommandLineFlags, false, \ 2485 "Print flags specified on command line or set by ergonomics") \ 2486 \ 2487 product(bool, PrintFlagsInitial, false, \ 2488 "Print all VM flags before argument processing and exit VM") \ 2489 \ 2490 product(bool, PrintFlagsFinal, false, \ 2491 "Print all VM flags after argument and ergonomic processing") \ 2492 \ 2493 notproduct(bool, PrintFlagsWithComments, false, \ 2494 "Print all VM flags with default values and descriptions and exit")\ 2495 \ 2496 diagnostic(bool, SerializeVMOutput, true, \ 2497 "Use a mutex to serialize output to tty and hotspot.log") \ 2498 \ 2499 diagnostic(bool, DisplayVMOutput, true, \ 2500 "Display all VM output on the tty, independently of LogVMOutput") \ 2501 \ 2502 diagnostic(bool, LogVMOutput, trueInDebug, \ 2503 "Save VM output to hotspot.log, or to LogFile") \ 2504 \ 2505 diagnostic(ccstr, LogFile, NULL, \ 2506 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2507 \ 2508 product(ccstr, ErrorFile, NULL, \ 2509 "If an error occurs, save the error data to this file " \ 2510 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2511 \ 2512 product(bool, DisplayVMOutputToStderr, false, \ 2513 "If DisplayVMOutput is true, display all VM output to stderr") \ 2514 \ 2515 product(bool, DisplayVMOutputToStdout, false, \ 2516 "If DisplayVMOutput is true, display all VM output to stdout") \ 2517 \ 2518 product(bool, UseHeavyMonitors, false, \ 2519 "use heavyweight instead of lightweight Java monitors") \ 2520 \ 2521 product(bool, PrintStringTableStatistics, false, \ 2522 "print statistics about the StringTable and SymbolTable") \ 2523 \ 2524 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2525 "print histogram of the symbol table") \ 2526 \ 2527 notproduct(bool, ExitVMOnVerifyError, false, \ 2528 "standard exit from VM if bytecode verify error " \ 2529 "(only in debug mode)") \ 2530 \ 2531 notproduct(ccstr, AbortVMOnException, NULL, \ 2532 "Call fatal if this exception is thrown. Example: " \ 2533 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2534 \ 2535 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2536 "Call fatal if the exception pointed by AbortVMOnException " \ 2537 "has this message.") \ 2538 \ 2539 develop(bool, DebugVtables, false, \ 2540 "add debugging code to vtable dispatch") \ 2541 \ 2542 develop(bool, PrintVtables, false, \ 2543 "print vtables when printing klass") \ 2544 \ 2545 notproduct(bool, PrintVtableStats, false, \ 2546 "print vtables stats at end of run") \ 2547 \ 2548 develop(bool, TraceCreateZombies, false, \ 2549 "trace creation of zombie nmethods") \ 2550 \ 2551 notproduct(bool, IgnoreLockingAssertions, false, \ 2552 "disable locking assertions (for speed)") \ 2553 \ 2554 product(bool, RangeCheckElimination, true, \ 2555 "Eliminate range checks") \ 2556 \ 2557 develop_pd(bool, UncommonNullCast, \ 2558 "track occurrences of null in casts; adjust compiler tactics") \ 2559 \ 2560 develop(bool, TypeProfileCasts, true, \ 2561 "treat casts like calls for purposes of type profiling") \ 2562 \ 2563 develop(bool, DelayCompilationDuringStartup, true, \ 2564 "Delay invoking the compiler until main application class is " \ 2565 "loaded") \ 2566 \ 2567 develop(bool, CompileTheWorld, false, \ 2568 "Compile all methods in all classes in bootstrap class path " \ 2569 "(stress test)") \ 2570 \ 2571 develop(bool, CompileTheWorldPreloadClasses, true, \ 2572 "Preload all classes used by a class before start loading") \ 2573 \ 2574 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2575 "Force a safepoint every n compiles so sweeper can keep up") \ 2576 \ 2577 develop(bool, FillDelaySlots, true, \ 2578 "Fill delay slots (on SPARC only)") \ 2579 \ 2580 develop(bool, TimeLivenessAnalysis, false, \ 2581 "Time computation of bytecode liveness analysis") \ 2582 \ 2583 develop(bool, TraceLivenessGen, false, \ 2584 "Trace the generation of liveness analysis information") \ 2585 \ 2586 notproduct(bool, TraceLivenessQuery, false, \ 2587 "Trace queries of liveness analysis information") \ 2588 \ 2589 notproduct(bool, CollectIndexSetStatistics, false, \ 2590 "Collect information about IndexSets") \ 2591 \ 2592 develop(bool, UseLoopSafepoints, true, \ 2593 "Generate Safepoint nodes in every loop") \ 2594 \ 2595 develop(intx, FastAllocateSizeLimit, 128*K, \ 2596 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2597 "Inline allocations larger than this in doublewords must go slow")\ 2598 \ 2599 product(bool, AggressiveOpts, false, \ 2600 "Enable aggressive optimizations - see arguments.cpp") \ 2601 \ 2602 /* statistics */ \ 2603 develop(bool, CountCompiledCalls, false, \ 2604 "counts method invocations") \ 2605 \ 2606 notproduct(bool, CountRuntimeCalls, false, \ 2607 "counts VM runtime calls") \ 2608 \ 2609 develop(bool, CountJNICalls, false, \ 2610 "counts jni method invocations") \ 2611 \ 2612 notproduct(bool, CountJVMCalls, false, \ 2613 "counts jvm method invocations") \ 2614 \ 2615 notproduct(bool, CountRemovableExceptions, false, \ 2616 "count exceptions that could be replaced by branches due to " \ 2617 "inlining") \ 2618 \ 2619 notproduct(bool, ICMissHistogram, false, \ 2620 "produce histogram of IC misses") \ 2621 \ 2622 notproduct(bool, PrintClassStatistics, false, \ 2623 "prints class statistics at end of run") \ 2624 \ 2625 notproduct(bool, PrintMethodStatistics, false, \ 2626 "prints method statistics at end of run") \ 2627 \ 2628 /* interpreter */ \ 2629 develop(bool, ClearInterpreterLocals, false, \ 2630 "Always clear local variables of interpreter activations upon " \ 2631 "entry") \ 2632 \ 2633 product_pd(bool, RewriteBytecodes, \ 2634 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2635 \ 2636 product_pd(bool, RewriteFrequentPairs, \ 2637 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2638 \ 2639 diagnostic(bool, PrintInterpreter, false, \ 2640 "Prints the generated interpreter code") \ 2641 \ 2642 product(bool, UseInterpreter, true, \ 2643 "Use interpreter for non-compiled methods") \ 2644 \ 2645 develop(bool, UseFastSignatureHandlers, true, \ 2646 "Use fast signature handlers for native calls") \ 2647 \ 2648 product(bool, UseLoopCounter, true, \ 2649 "Increment invocation counter on backward branch") \ 2650 \ 2651 product(bool, UseFastEmptyMethods, true, \ 2652 "Use fast method entry code for empty methods") \ 2653 \ 2654 product(bool, UseFastAccessorMethods, true, \ 2655 "Use fast method entry code for accessor methods") \ 2656 \ 2657 product_pd(bool, UseOnStackReplacement, \ 2658 "Use on stack replacement, calls runtime if invoc. counter " \ 2659 "overflows in loop") \ 2660 \ 2661 notproduct(bool, TraceOnStackReplacement, false, \ 2662 "Trace on stack replacement") \ 2663 \ 2664 product_pd(bool, PreferInterpreterNativeStubs, \ 2665 "Use always interpreter stubs for native methods invoked via " \ 2666 "interpreter") \ 2667 \ 2668 develop(bool, CountBytecodes, false, \ 2669 "Count number of bytecodes executed") \ 2670 \ 2671 develop(bool, PrintBytecodeHistogram, false, \ 2672 "Print histogram of the executed bytecodes") \ 2673 \ 2674 develop(bool, PrintBytecodePairHistogram, false, \ 2675 "Print histogram of the executed bytecode pairs") \ 2676 \ 2677 diagnostic(bool, PrintSignatureHandlers, false, \ 2678 "Print code generated for native method signature handlers") \ 2679 \ 2680 develop(bool, VerifyOops, false, \ 2681 "Do plausibility checks for oops") \ 2682 \ 2683 develop(bool, CheckUnhandledOops, false, \ 2684 "Check for unhandled oops in VM code") \ 2685 \ 2686 develop(bool, VerifyJNIFields, trueInDebug, \ 2687 "Verify jfieldIDs for instance fields") \ 2688 \ 2689 notproduct(bool, VerifyJNIEnvThread, false, \ 2690 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2691 "from JNI") \ 2692 \ 2693 develop(bool, VerifyFPU, false, \ 2694 "Verify FPU state (check for NaN's, etc.)") \ 2695 \ 2696 develop(bool, VerifyThread, false, \ 2697 "Watch the thread register for corruption (SPARC only)") \ 2698 \ 2699 develop(bool, VerifyActivationFrameSize, false, \ 2700 "Verify that activation frame didn't become smaller than its " \ 2701 "minimal size") \ 2702 \ 2703 develop(bool, TraceFrequencyInlining, false, \ 2704 "Trace frequency based inlining") \ 2705 \ 2706 develop_pd(bool, InlineIntrinsics, \ 2707 "Inline intrinsics that can be statically resolved") \ 2708 \ 2709 product_pd(bool, ProfileInterpreter, \ 2710 "Profile at the bytecode level during interpretation") \ 2711 \ 2712 develop_pd(bool, ProfileTraps, \ 2713 "Profile deoptimization traps at the bytecode level") \ 2714 \ 2715 product(intx, ProfileMaturityPercentage, 20, \ 2716 "number of method invocations/branches (expressed as % of " \ 2717 "CompileThreshold) before using the method's profile") \ 2718 \ 2719 develop(bool, PrintMethodData, false, \ 2720 "Print the results of +ProfileInterpreter at end of run") \ 2721 \ 2722 develop(bool, VerifyDataPointer, trueInDebug, \ 2723 "Verify the method data pointer during interpreter profiling") \ 2724 \ 2725 develop(bool, VerifyCompiledCode, false, \ 2726 "Include miscellaneous runtime verifications in nmethod code; " \ 2727 "default off because it disturbs nmethod size heuristics") \ 2728 \ 2729 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2730 "Manually make GC thread crash then dump java stack trace; " \ 2731 "Test only") \ 2732 \ 2733 /* compilation */ \ 2734 product(bool, UseCompiler, true, \ 2735 "use compilation") \ 2736 \ 2737 develop(bool, TraceCompilationPolicy, false, \ 2738 "Trace compilation policy") \ 2739 \ 2740 develop(bool, TimeCompilationPolicy, false, \ 2741 "Time the compilation policy") \ 2742 \ 2743 product(bool, UseCounterDecay, true, \ 2744 "adjust recompilation counters") \ 2745 \ 2746 develop(intx, CounterHalfLifeTime, 30, \ 2747 "half-life time of invocation counters (in secs)") \ 2748 \ 2749 develop(intx, CounterDecayMinIntervalLength, 500, \ 2750 "Min. ms. between invocation of CounterDecay") \ 2751 \ 2752 product(bool, AlwaysCompileLoopMethods, false, \ 2753 "when using recompilation, never interpret methods " \ 2754 "containing loops") \ 2755 \ 2756 product(bool, DontCompileHugeMethods, true, \ 2757 "don't compile methods > HugeMethodLimit") \ 2758 \ 2759 /* Bytecode escape analysis estimation. */ \ 2760 product(bool, EstimateArgEscape, true, \ 2761 "Analyze bytecodes to estimate escape state of arguments") \ 2762 \ 2763 product(intx, BCEATraceLevel, 0, \ 2764 "How much tracing to do of bytecode escape analysis estimates") \ 2765 \ 2766 product(intx, MaxBCEAEstimateLevel, 5, \ 2767 "Maximum number of nested calls that are analyzed by BC EA.") \ 2768 \ 2769 product(intx, MaxBCEAEstimateSize, 150, \ 2770 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2771 \ 2772 product(intx, AllocatePrefetchStyle, 1, \ 2773 "0 = no prefetch, " \ 2774 "1 = prefetch instructions for each allocation, " \ 2775 "2 = use TLAB watermark to gate allocation prefetch, " \ 2776 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2777 \ 2778 product(intx, AllocatePrefetchDistance, -1, \ 2779 "Distance to prefetch ahead of allocation pointer") \ 2780 \ 2781 product(intx, AllocatePrefetchLines, 3, \ 2782 "Number of lines to prefetch ahead of array allocation pointer") \ 2783 \ 2784 product(intx, AllocateInstancePrefetchLines, 1, \ 2785 "Number of lines to prefetch ahead of instance allocation pointer") \ 2786 \ 2787 product(intx, AllocatePrefetchStepSize, 16, \ 2788 "Step size in bytes of sequential prefetch instructions") \ 2789 \ 2790 product(intx, AllocatePrefetchInstr, 0, \ 2791 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2792 \ 2793 /* deoptimization */ \ 2794 develop(bool, TraceDeoptimization, false, \ 2795 "Trace deoptimization") \ 2796 \ 2797 develop(bool, DebugDeoptimization, false, \ 2798 "Tracing various information while debugging deoptimization") \ 2799 \ 2800 product(intx, SelfDestructTimer, 0, \ 2801 "Will cause VM to terminate after a given time (in minutes) " \ 2802 "(0 means off)") \ 2803 \ 2804 product(intx, MaxJavaStackTraceDepth, 1024, \ 2805 "Max. no. of lines in the stack trace for Java exceptions " \ 2806 "(0 means all)") \ 2807 \ 2808 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2809 "Guarantee a safepoint (at least) every so many milliseconds " \ 2810 "(0 means none)")) \ 2811 \ 2812 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2813 "Guarantee a safepoint (at least) every so many milliseconds " \ 2814 "(0 means none)")) \ 2815 \ 2816 product(intx, SafepointTimeoutDelay, 10000, \ 2817 "Delay in milliseconds for option SafepointTimeout") \ 2818 \ 2819 product(intx, NmethodSweepFraction, 16, \ 2820 "Number of invocations of sweeper to cover all nmethods") \ 2821 \ 2822 product(intx, NmethodSweepCheckInterval, 5, \ 2823 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2824 \ 2825 notproduct(bool, LogSweeper, false, \ 2826 "Keep a ring buffer of sweeper activity") \ 2827 \ 2828 notproduct(intx, SweeperLogEntries, 1024, \ 2829 "Number of records in the ring buffer of sweeper activity") \ 2830 \ 2831 notproduct(intx, MemProfilingInterval, 500, \ 2832 "Time between each invocation of the MemProfiler") \ 2833 \ 2834 develop(intx, MallocCatchPtr, -1, \ 2835 "Hit breakpoint when mallocing/freeing this pointer") \ 2836 \ 2837 notproduct(intx, AssertRepeat, 1, \ 2838 "number of times to evaluate expression in assert " \ 2839 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2840 \ 2841 notproduct(ccstrlist, SuppressErrorAt, "", \ 2842 "List of assertions (file:line) to muzzle") \ 2843 \ 2844 notproduct(uintx, HandleAllocationLimit, 1024, \ 2845 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2846 "is used") \ 2847 \ 2848 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2849 "Threshold for total handle allocation when " \ 2850 "+TraceHandleAllocation is used") \ 2851 \ 2852 develop(intx, StackPrintLimit, 100, \ 2853 "number of stack frames to print in VM-level stack dump") \ 2854 \ 2855 notproduct(intx, MaxElementPrintSize, 256, \ 2856 "maximum number of elements to print") \ 2857 \ 2858 notproduct(intx, MaxSubklassPrintSize, 4, \ 2859 "maximum number of subklasses to print when printing klass") \ 2860 \ 2861 product(intx, MaxInlineLevel, 9, \ 2862 "maximum number of nested calls that are inlined") \ 2863 \ 2864 product(intx, MaxRecursiveInlineLevel, 1, \ 2865 "maximum number of nested recursive calls that are inlined") \ 2866 \ 2867 product_pd(intx, InlineSmallCode, \ 2868 "Only inline already compiled methods if their code size is " \ 2869 "less than this") \ 2870 \ 2871 product(intx, MaxInlineSize, 35, \ 2872 "maximum bytecode size of a method to be inlined") \ 2873 \ 2874 product_pd(intx, FreqInlineSize, \ 2875 "maximum bytecode size of a frequent method to be inlined") \ 2876 \ 2877 product(intx, MaxTrivialSize, 6, \ 2878 "maximum bytecode size of a trivial method to be inlined") \ 2879 \ 2880 product(intx, MinInliningThreshold, 250, \ 2881 "min. invocation count a method needs to have to be inlined") \ 2882 \ 2883 develop(intx, MethodHistogramCutoff, 100, \ 2884 "cutoff value for method invoc. histogram (+CountCalls)") \ 2885 \ 2886 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2887 "# of interpreted methods to show in profile") \ 2888 \ 2889 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2890 "# of compiled methods to show in profile") \ 2891 \ 2892 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2893 "# of stub methods to show in profile") \ 2894 \ 2895 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2896 "# of runtime stub nodes to show in profile") \ 2897 \ 2898 product(intx, ProfileIntervalsTicks, 100, \ 2899 "# of ticks between printing of interval profile " \ 2900 "(+ProfileIntervals)") \ 2901 \ 2902 notproduct(intx, ScavengeALotInterval, 1, \ 2903 "Interval between which scavenge will occur with +ScavengeALot") \ 2904 \ 2905 notproduct(intx, FullGCALotInterval, 1, \ 2906 "Interval between which full gc will occur with +FullGCALot") \ 2907 \ 2908 notproduct(intx, FullGCALotStart, 0, \ 2909 "For which invocation to start FullGCAlot") \ 2910 \ 2911 notproduct(intx, FullGCALotDummies, 32*K, \ 2912 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2913 "to move") \ 2914 \ 2915 develop(intx, DontYieldALotInterval, 10, \ 2916 "Interval between which yields will be dropped (milliseconds)") \ 2917 \ 2918 develop(intx, MinSleepInterval, 1, \ 2919 "Minimum sleep() interval (milliseconds) when " \ 2920 "ConvertSleepToYield is off (used for SOLARIS)") \ 2921 \ 2922 develop(intx, ProfilerPCTickThreshold, 15, \ 2923 "Number of ticks in a PC buckets to be a hotspot") \ 2924 \ 2925 notproduct(intx, DeoptimizeALotInterval, 5, \ 2926 "Number of exits until DeoptimizeALot kicks in") \ 2927 \ 2928 notproduct(intx, ZombieALotInterval, 5, \ 2929 "Number of exits until ZombieALot kicks in") \ 2930 \ 2931 develop(bool, StressNonEntrant, false, \ 2932 "Mark nmethods non-entrant at registration") \ 2933 \ 2934 diagnostic(intx, MallocVerifyInterval, 0, \ 2935 "if non-zero, verify C heap after every N calls to " \ 2936 "malloc/realloc/free") \ 2937 \ 2938 diagnostic(intx, MallocVerifyStart, 0, \ 2939 "if non-zero, start verifying C heap after Nth call to " \ 2940 "malloc/realloc/free") \ 2941 \ 2942 diagnostic(uintx, MallocMaxTestWords, 0, \ 2943 "if non-zero, max # of Words that malloc/realloc can allocate " \ 2944 "(for testing only)") \ 2945 \ 2946 product(intx, TypeProfileWidth, 2, \ 2947 "number of receiver types to record in call/cast profile") \ 2948 \ 2949 develop(intx, BciProfileWidth, 2, \ 2950 "number of return bci's to record in ret profile") \ 2951 \ 2952 product(intx, PerMethodRecompilationCutoff, 400, \ 2953 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2954 \ 2955 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2956 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2957 \ 2958 product(intx, PerMethodTrapLimit, 100, \ 2959 "Limit on traps (of one kind) in a method (includes inlines)") \ 2960 \ 2961 product(intx, PerBytecodeTrapLimit, 4, \ 2962 "Limit on traps (of one kind) at a particular BCI") \ 2963 \ 2964 develop(intx, InlineFrequencyRatio, 20, \ 2965 "Ratio of call site execution to caller method invocation") \ 2966 \ 2967 develop_pd(intx, InlineFrequencyCount, \ 2968 "Count of call site execution necessary to trigger frequent " \ 2969 "inlining") \ 2970 \ 2971 develop(intx, InlineThrowCount, 50, \ 2972 "Force inlining of interpreted methods that throw this often") \ 2973 \ 2974 develop(intx, InlineThrowMaxSize, 200, \ 2975 "Force inlining of throwing methods smaller than this") \ 2976 \ 2977 develop(intx, ProfilerNodeSize, 1024, \ 2978 "Size in K to allocate for the Profile Nodes of each thread") \ 2979 \ 2980 product_pd(intx, PreInflateSpin, \ 2981 "Number of times to spin wait before inflation") \ 2982 \ 2983 /* gc parameters */ \ 2984 product(uintx, InitialHeapSize, 0, \ 2985 "Initial heap size (in bytes); zero means use ergonomics") \ 2986 \ 2987 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 2988 "Maximum heap size (in bytes)") \ 2989 \ 2990 product(uintx, OldSize, ScaleForWordSize(4*M), \ 2991 "Initial tenured generation size (in bytes)") \ 2992 \ 2993 product(uintx, NewSize, ScaleForWordSize(1*M), \ 2994 "Initial new generation size (in bytes)") \ 2995 \ 2996 product(uintx, MaxNewSize, max_uintx, \ 2997 "Maximum new generation size (in bytes), max_uintx means set " \ 2998 "ergonomically") \ 2999 \ 3000 product(uintx, PretenureSizeThreshold, 0, \ 3001 "Maximum size in bytes of objects allocated in DefNew " \ 3002 "generation; zero means no maximum") \ 3003 \ 3004 product(uintx, TLABSize, 0, \ 3005 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3006 \ 3007 product(uintx, MinTLABSize, 2*K, \ 3008 "Minimum allowed TLAB size (in bytes)") \ 3009 \ 3010 product(uintx, TLABAllocationWeight, 35, \ 3011 "Allocation averaging weight") \ 3012 \ 3013 product(uintx, TLABWasteTargetPercent, 1, \ 3014 "Percentage of Eden that can be wasted") \ 3015 \ 3016 product(uintx, TLABRefillWasteFraction, 64, \ 3017 "Max TLAB waste at a refill (internal fragmentation)") \ 3018 \ 3019 product(uintx, TLABWasteIncrement, 4, \ 3020 "Increment allowed waste at slow allocation") \ 3021 \ 3022 product(uintx, SurvivorRatio, 8, \ 3023 "Ratio of eden/survivor space size") \ 3024 \ 3025 product(uintx, NewRatio, 2, \ 3026 "Ratio of new/old generation sizes") \ 3027 \ 3028 product_pd(uintx, NewSizeThreadIncrease, \ 3029 "Additional size added to desired new generation size per " \ 3030 "non-daemon thread (in bytes)") \ 3031 \ 3032 product_pd(uintx, MetaspaceSize, \ 3033 "Initial size of Metaspaces (in bytes)") \ 3034 \ 3035 product(uintx, MaxMetaspaceSize, max_uintx, \ 3036 "Maximum size of Metaspaces (in bytes)") \ 3037 \ 3038 product(uintx, ClassMetaspaceSize, 2*M, \ 3039 "Maximum size of InstanceKlass area in Metaspace used for " \ 3040 "UseCompressedKlassPointers") \ 3041 \ 3042 product(uintx, MinHeapFreeRatio, 40, \ 3043 "Min percentage of heap free after GC to avoid expansion") \ 3044 \ 3045 product(uintx, MaxHeapFreeRatio, 70, \ 3046 "Max percentage of heap free after GC to avoid shrinking") \ 3047 \ 3048 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3049 "Number of milliseconds per MB of free space in the heap") \ 3050 \ 3051 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3052 "Min change in heap space due to GC (in bytes)") \ 3053 \ 3054 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3055 "Min expansion of Metaspace (in bytes)") \ 3056 \ 3057 product(uintx, MinMetaspaceFreeRatio, 40, \ 3058 "Min percentage of Metaspace free after GC to avoid expansion") \ 3059 \ 3060 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3061 "Max percentage of Metaspace free after GC to avoid shrinking") \ 3062 \ 3063 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3064 "Max expansion of Metaspace without full GC (in bytes)") \ 3065 \ 3066 product(uintx, QueuedAllocationWarningCount, 0, \ 3067 "Number of times an allocation that queues behind a GC " \ 3068 "will retry before printing a warning") \ 3069 \ 3070 diagnostic(uintx, VerifyGCStartAt, 0, \ 3071 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3072 \ 3073 diagnostic(intx, VerifyGCLevel, 0, \ 3074 "Generation level at which to start +VerifyBefore/AfterGC") \ 3075 \ 3076 product(uintx, MaxTenuringThreshold, 15, \ 3077 "Maximum value for tenuring threshold") \ 3078 \ 3079 product(uintx, InitialTenuringThreshold, 7, \ 3080 "Initial value for tenuring threshold") \ 3081 \ 3082 product(uintx, TargetSurvivorRatio, 50, \ 3083 "Desired percentage of survivor space used after scavenge") \ 3084 \ 3085 product(uintx, MarkSweepDeadRatio, 5, \ 3086 "Percentage (0-100) of the old gen allowed as dead wood." \ 3087 "Serial mark sweep treats this as both the min and max value." \ 3088 "CMS uses this value only if it falls back to mark sweep." \ 3089 "Par compact uses a variable scale based on the density of the" \ 3090 "generation and treats this as the max value when the heap is" \ 3091 "either completely full or completely empty. Par compact also" \ 3092 "has a smaller default value; see arguments.cpp.") \ 3093 \ 3094 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3095 "How often should we fully compact the heap (ignoring the dead " \ 3096 "space parameters)") \ 3097 \ 3098 product(intx, PrintCMSStatistics, 0, \ 3099 "Statistics for CMS") \ 3100 \ 3101 product(bool, PrintCMSInitiationStatistics, false, \ 3102 "Statistics for initiating a CMS collection") \ 3103 \ 3104 product(intx, PrintFLSStatistics, 0, \ 3105 "Statistics for CMS' FreeListSpace") \ 3106 \ 3107 product(intx, PrintFLSCensus, 0, \ 3108 "Census for CMS' FreeListSpace") \ 3109 \ 3110 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3111 "Delay in ms between expansion and allocation") \ 3112 \ 3113 develop(uintx, GCWorkerDelayMillis, 0, \ 3114 "Delay in ms in scheduling GC workers") \ 3115 \ 3116 product(intx, DeferThrSuspendLoopCount, 4000, \ 3117 "(Unstable) Number of times to iterate in safepoint loop " \ 3118 " before blocking VM threads ") \ 3119 \ 3120 product(intx, DeferPollingPageLoopCount, -1, \ 3121 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3122 "before changing safepoint polling page to RO ") \ 3123 \ 3124 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3125 \ 3126 product(bool, PSChunkLargeArrays, true, \ 3127 "true: process large arrays in chunks") \ 3128 \ 3129 product(uintx, GCDrainStackTargetSize, 64, \ 3130 "how many entries we'll try to leave on the stack during " \ 3131 "parallel GC") \ 3132 \ 3133 /* stack parameters */ \ 3134 product_pd(intx, StackYellowPages, \ 3135 "Number of yellow zone (recoverable overflows) pages") \ 3136 \ 3137 product_pd(intx, StackRedPages, \ 3138 "Number of red zone (unrecoverable overflows) pages") \ 3139 \ 3140 product_pd(intx, StackShadowPages, \ 3141 "Number of shadow zone (for overflow checking) pages" \ 3142 " this should exceed the depth of the VM and native call stack") \ 3143 \ 3144 product_pd(intx, ThreadStackSize, \ 3145 "Thread Stack Size (in Kbytes)") \ 3146 \ 3147 product_pd(intx, VMThreadStackSize, \ 3148 "Non-Java Thread Stack Size (in Kbytes)") \ 3149 \ 3150 product_pd(intx, CompilerThreadStackSize, \ 3151 "Compiler Thread Stack Size (in Kbytes)") \ 3152 \ 3153 develop_pd(uintx, JVMInvokeMethodSlack, \ 3154 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3155 \ 3156 product(uintx, ThreadSafetyMargin, 50*M, \ 3157 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3158 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3159 "disable this feature") \ 3160 \ 3161 /* code cache parameters */ \ 3162 /* ppc64 has large code-entry alignment. */ \ 3163 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64), \ 3164 "Code cache segment size (in bytes) - smallest unit of " \ 3165 "allocation") \ 3166 \ 3167 develop_pd(intx, CodeEntryAlignment, \ 3168 "Code entry alignment for generated code (in bytes)") \ 3169 \ 3170 product_pd(intx, OptoLoopAlignment, \ 3171 "Align inner loops to zero relative to this modulus") \ 3172 \ 3173 product_pd(uintx, InitialCodeCacheSize, \ 3174 "Initial code cache size (in bytes)") \ 3175 \ 3176 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3177 "Minimum code cache size (in bytes) required to start VM.") \ 3178 \ 3179 product_pd(uintx, ReservedCodeCacheSize, \ 3180 "Reserved code cache size (in bytes) - maximum code cache size") \ 3181 \ 3182 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3183 "When less than X space left, we stop compiling.") \ 3184 \ 3185 product_pd(uintx, CodeCacheExpansionSize, \ 3186 "Code cache expansion size (in bytes)") \ 3187 \ 3188 develop_pd(uintx, CodeCacheMinBlockLength, \ 3189 "Minimum number of segments in a code cache block.") \ 3190 \ 3191 notproduct(bool, ExitOnFullCodeCache, false, \ 3192 "Exit the VM if we fill the code cache.") \ 3193 \ 3194 product(bool, UseCodeCacheFlushing, true, \ 3195 "Attempt to clean the code cache before shutting off compiler") \ 3196 \ 3197 product(intx, MinCodeCacheFlushingInterval, 30, \ 3198 "Min number of seconds between code cache cleaning sessions") \ 3199 \ 3200 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3201 "When less than X space left, start code cache cleaning") \ 3202 \ 3203 product(uintx, CodeCacheFlushingFraction, 2, \ 3204 "Fraction of the code cache that is flushed when full") \ 3205 \ 3206 /* interpreter debugging */ \ 3207 develop(intx, BinarySwitchThreshold, 5, \ 3208 "Minimal number of lookupswitch entries for rewriting to binary " \ 3209 "switch") \ 3210 \ 3211 develop(intx, StopInterpreterAt, 0, \ 3212 "Stops interpreter execution at specified bytecode number") \ 3213 \ 3214 develop(intx, TraceBytecodesAt, 0, \ 3215 "Traces bytecodes starting with specified bytecode number") \ 3216 \ 3217 /* compiler interface */ \ 3218 develop(intx, CIStart, 0, \ 3219 "the id of the first compilation to permit") \ 3220 \ 3221 develop(intx, CIStop, -1, \ 3222 "the id of the last compilation to permit") \ 3223 \ 3224 develop(intx, CIStartOSR, 0, \ 3225 "the id of the first osr compilation to permit " \ 3226 "(CICountOSR must be on)") \ 3227 \ 3228 develop(intx, CIStopOSR, -1, \ 3229 "the id of the last osr compilation to permit " \ 3230 "(CICountOSR must be on)") \ 3231 \ 3232 develop(intx, CIBreakAtOSR, -1, \ 3233 "id of osr compilation to break at") \ 3234 \ 3235 develop(intx, CIBreakAt, -1, \ 3236 "id of compilation to break at") \ 3237 \ 3238 product(ccstrlist, CompileOnly, "", \ 3239 "List of methods (pkg/class.name) to restrict compilation to") \ 3240 \ 3241 product(ccstr, CompileCommandFile, NULL, \ 3242 "Read compiler commands from this file [.hotspot_compiler]") \ 3243 \ 3244 product(ccstrlist, CompileCommand, "", \ 3245 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3246 \ 3247 develop(bool, ReplayCompiles, false, \ 3248 "Enable replay of compilations from ReplayDataFile") \ 3249 \ 3250 product(ccstr, ReplayDataFile, NULL, \ 3251 "File containing compilation replay information" \ 3252 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3253 \ 3254 develop(intx, ReplaySuppressInitializers, 2, \ 3255 "Controls handling of class initialization during replay" \ 3256 "0 - don't do anything special" \ 3257 "1 - treat all class initializers as empty" \ 3258 "2 - treat class initializers for application classes as empty" \ 3259 "3 - allow all class initializers to run during bootstrap but" \ 3260 " pretend they are empty after starting replay") \ 3261 \ 3262 develop(bool, ReplayIgnoreInitErrors, false, \ 3263 "Ignore exceptions thrown during initialization for replay") \ 3264 \ 3265 product(bool, DumpReplayDataOnError, true, \ 3266 "Record replay data for crashing compiler threads") \ 3267 \ 3268 product(bool, CICompilerCountPerCPU, false, \ 3269 "1 compiler thread for log(N CPUs)") \ 3270 \ 3271 develop(intx, CIFireOOMAt, -1, \ 3272 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3273 "(non-negative value throws OOM after this many CI accesses " \ 3274 "in each compile)") \ 3275 notproduct(intx, CICrashAt, -1, \ 3276 "id of compilation to trigger assert in compiler thread for " \ 3277 "the purpose of testing, e.g. generation of replay data") \ 3278 notproduct(bool, CIObjectFactoryVerify, false, \ 3279 "enable potentially expensive verification in ciObjectFactory") \ 3280 \ 3281 /* Priorities */ \ 3282 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3283 \ 3284 product(intx, ThreadPriorityPolicy, 0, \ 3285 "0 : Normal. "\ 3286 " VM chooses priorities that are appropriate for normal "\ 3287 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3288 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3289 " map to lower native priority values. On Windows applications"\ 3290 " are allowed to use higher native priorities. However, with "\ 3291 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3292 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3293 " interfere with system threads. On Linux thread priorities "\ 3294 " are ignored because the OS does not support static priority "\ 3295 " in SCHED_OTHER scheduling class which is the only choice for"\ 3296 " non-root, non-realtime applications. "\ 3297 "1 : Aggressive. "\ 3298 " Java thread priorities map over to the entire range of "\ 3299 " native thread priorities. Higher Java thread priorities map "\ 3300 " to higher native thread priorities. This policy should be "\ 3301 " used with care, as sometimes it can cause performance "\ 3302 " degradation in the application and/or the entire system. On "\ 3303 " Linux this policy requires root privilege.") \ 3304 \ 3305 product(bool, ThreadPriorityVerbose, false, \ 3306 "Print priority changes") \ 3307 \ 3308 product(intx, DefaultThreadPriority, -1, \ 3309 "The native priority at which threads run if not elsewhere " \ 3310 "specified (-1 means no change)") \ 3311 \ 3312 product(intx, CompilerThreadPriority, -1, \ 3313 "The native priority at which compiler threads should run " \ 3314 "(-1 means no change)") \ 3315 \ 3316 product(intx, VMThreadPriority, -1, \ 3317 "The native priority at which the VM thread should run " \ 3318 "(-1 means no change)") \ 3319 \ 3320 product(bool, CompilerThreadHintNoPreempt, true, \ 3321 "(Solaris only) Give compiler threads an extra quanta") \ 3322 \ 3323 product(bool, VMThreadHintNoPreempt, false, \ 3324 "(Solaris only) Give VM thread an extra quanta") \ 3325 \ 3326 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3327 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3328 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3329 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3330 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3331 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3332 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3333 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3334 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3335 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3336 \ 3337 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3338 "Java thread priority 10 maps to critical scheduling priority") \ 3339 \ 3340 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3341 "Compiler thread(s) run at critical scheduling priority") \ 3342 \ 3343 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3344 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3345 \ 3346 /* compiler debugging */ \ 3347 notproduct(intx, CompileTheWorldStartAt, 1, \ 3348 "First class to consider when using +CompileTheWorld") \ 3349 \ 3350 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3351 "Last class to consider when using +CompileTheWorld") \ 3352 \ 3353 develop(intx, NewCodeParameter, 0, \ 3354 "Testing Only: Create a dedicated integer parameter before " \ 3355 "putback") \ 3356 \ 3357 /* new oopmap storage allocation */ \ 3358 develop(intx, MinOopMapAllocation, 8, \ 3359 "Minimum number of OopMap entries in an OopMapSet") \ 3360 \ 3361 /* Background Compilation */ \ 3362 develop(intx, LongCompileThreshold, 50, \ 3363 "Used with +TraceLongCompiles") \ 3364 \ 3365 product(intx, StarvationMonitorInterval, 200, \ 3366 "Pause between each check in ms") \ 3367 \ 3368 /* recompilation */ \ 3369 product_pd(intx, CompileThreshold, \ 3370 "number of interpreted method invocations before (re-)compiling") \ 3371 \ 3372 product_pd(intx, BackEdgeThreshold, \ 3373 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3374 \ 3375 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3376 "Interpreter (tier 0) invocation notification frequency.") \ 3377 \ 3378 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3379 "C1 without MDO (tier 2) invocation notification frequency.") \ 3380 \ 3381 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3382 "C1 with MDO profiling (tier 3) invocation notification " \ 3383 "frequency.") \ 3384 \ 3385 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3386 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3387 \ 3388 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3389 "Interpreter (tier 0) invocation notification frequency.") \ 3390 \ 3391 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3392 "C1 without MDO (tier 2) invocation notification frequency.") \ 3393 \ 3394 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3395 "C1 with MDO profiling (tier 3) invocation notification " \ 3396 "frequency.") \ 3397 \ 3398 product(intx, Tier2CompileThreshold, 0, \ 3399 "threshold at which tier 2 compilation is invoked") \ 3400 \ 3401 product(intx, Tier2BackEdgeThreshold, 0, \ 3402 "Back edge threshold at which tier 2 compilation is invoked") \ 3403 \ 3404 product(intx, Tier3InvocationThreshold, 200, \ 3405 "Compile if number of method invocations crosses this " \ 3406 "threshold") \ 3407 \ 3408 product(intx, Tier3MinInvocationThreshold, 100, \ 3409 "Minimum invocation to compile at tier 3") \ 3410 \ 3411 product(intx, Tier3CompileThreshold, 2000, \ 3412 "Threshold at which tier 3 compilation is invoked (invocation " \ 3413 "minimum must be satisfied.") \ 3414 \ 3415 product(intx, Tier3BackEdgeThreshold, 60000, \ 3416 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3417 \ 3418 product(intx, Tier4InvocationThreshold, 5000, \ 3419 "Compile if number of method invocations crosses this " \ 3420 "threshold") \ 3421 \ 3422 product(intx, Tier4MinInvocationThreshold, 600, \ 3423 "Minimum invocation to compile at tier 4") \ 3424 \ 3425 product(intx, Tier4CompileThreshold, 15000, \ 3426 "Threshold at which tier 4 compilation is invoked (invocation " \ 3427 "minimum must be satisfied.") \ 3428 \ 3429 product(intx, Tier4BackEdgeThreshold, 40000, \ 3430 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3431 \ 3432 product(intx, Tier3DelayOn, 5, \ 3433 "If C2 queue size grows over this amount per compiler thread " \ 3434 "stop compiling at tier 3 and start compiling at tier 2") \ 3435 \ 3436 product(intx, Tier3DelayOff, 2, \ 3437 "If C2 queue size is less than this amount per compiler thread " \ 3438 "allow methods compiled at tier 2 transition to tier 3") \ 3439 \ 3440 product(intx, Tier3LoadFeedback, 5, \ 3441 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3442 "reaches this amount per compiler thread") \ 3443 \ 3444 product(intx, Tier4LoadFeedback, 3, \ 3445 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3446 "reaches this amount per compiler thread") \ 3447 \ 3448 product(intx, TieredCompileTaskTimeout, 50, \ 3449 "Kill compile task if method was not used within " \ 3450 "given timeout in milliseconds") \ 3451 \ 3452 product(intx, TieredStopAtLevel, 4, \ 3453 "Stop at given compilation level") \ 3454 \ 3455 product(intx, Tier0ProfilingStartPercentage, 200, \ 3456 "Start profiling in interpreter if the counters exceed tier 3" \ 3457 "thresholds by the specified percentage") \ 3458 \ 3459 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3460 "Increase the compile threshold for C1 compilation if the code" \ 3461 "cache is filled by the specified percentage.") \ 3462 \ 3463 product(intx, TieredRateUpdateMinTime, 1, \ 3464 "Minimum rate sampling interval (in milliseconds)") \ 3465 \ 3466 product(intx, TieredRateUpdateMaxTime, 25, \ 3467 "Maximum rate sampling interval (in milliseconds)") \ 3468 \ 3469 product_pd(bool, TieredCompilation, \ 3470 "Enable tiered compilation") \ 3471 \ 3472 product(bool, PrintTieredEvents, false, \ 3473 "Print tiered events notifications") \ 3474 \ 3475 product_pd(intx, OnStackReplacePercentage, \ 3476 "NON_TIERED number of method invocations/branches (expressed as %"\ 3477 "of CompileThreshold) before (re-)compiling OSR code") \ 3478 \ 3479 product(intx, InterpreterProfilePercentage, 33, \ 3480 "NON_TIERED number of method invocations/branches (expressed as %"\ 3481 "of CompileThreshold) before profiling in the interpreter") \ 3482 \ 3483 develop(intx, MaxRecompilationSearchLength, 10, \ 3484 "max. # frames to inspect searching for recompilee") \ 3485 \ 3486 develop(intx, MaxInterpretedSearchLength, 3, \ 3487 "max. # interp. frames to skip when searching for recompilee") \ 3488 \ 3489 develop(intx, DesiredMethodLimit, 8000, \ 3490 "desired max. method size (in bytecodes) after inlining") \ 3491 \ 3492 develop(intx, HugeMethodLimit, 8000, \ 3493 "don't compile methods larger than this if " \ 3494 "+DontCompileHugeMethods") \ 3495 \ 3496 /* New JDK 1.4 reflection implementation */ \ 3497 \ 3498 develop(bool, UseNewReflection, true, \ 3499 "Temporary flag for transition to reflection based on dynamic " \ 3500 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3501 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3502 "changes were needed") \ 3503 \ 3504 develop(bool, VerifyReflectionBytecodes, false, \ 3505 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3506 "in situations like that described in 4486457 or for " \ 3507 "constructors generated for serialization, so can not be enabled "\ 3508 "in product.") \ 3509 \ 3510 product(bool, ReflectionWrapResolutionErrors, true, \ 3511 "Temporary flag for transition to AbstractMethodError wrapped " \ 3512 "in InvocationTargetException. See 6531596") \ 3513 \ 3514 \ 3515 develop(intx, FastSuperclassLimit, 8, \ 3516 "Depth of hardwired instanceof accelerator array") \ 3517 \ 3518 /* Properties for Java libraries */ \ 3519 \ 3520 product(uintx, MaxDirectMemorySize, 0, \ 3521 "Maximum total size of NIO direct-buffer allocations") \ 3522 \ 3523 /* temporary developer defined flags */ \ 3524 \ 3525 diagnostic(bool, UseNewCode, false, \ 3526 "Testing Only: Use the new version while testing") \ 3527 \ 3528 diagnostic(bool, UseNewCode2, false, \ 3529 "Testing Only: Use the new version while testing") \ 3530 \ 3531 diagnostic(bool, UseNewCode3, false, \ 3532 "Testing Only: Use the new version while testing") \ 3533 \ 3534 /* flags for performance data collection */ \ 3535 \ 3536 product(bool, UsePerfData, falseInEmbedded, \ 3537 "Flag to disable jvmstat instrumentation for performance testing" \ 3538 "and problem isolation purposes.") \ 3539 \ 3540 product(bool, PerfDataSaveToFile, false, \ 3541 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3542 \ 3543 product(ccstr, PerfDataSaveFile, NULL, \ 3544 "Save PerfData memory to the specified absolute pathname," \ 3545 "%p in the file name if present will be replaced by pid") \ 3546 \ 3547 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3548 "Data sampling interval in milliseconds") \ 3549 \ 3550 develop(bool, PerfTraceDataCreation, false, \ 3551 "Trace creation of Performance Data Entries") \ 3552 \ 3553 develop(bool, PerfTraceMemOps, false, \ 3554 "Trace PerfMemory create/attach/detach calls") \ 3555 \ 3556 product(bool, PerfDisableSharedMem, false, \ 3557 "Store performance data in standard memory") \ 3558 \ 3559 product(intx, PerfDataMemorySize, 32*K, \ 3560 "Size of performance data memory region. Will be rounded " \ 3561 "up to a multiple of the native os page size.") \ 3562 \ 3563 product(intx, PerfMaxStringConstLength, 1024, \ 3564 "Maximum PerfStringConstant string length before truncation") \ 3565 \ 3566 product(bool, PerfAllowAtExitRegistration, false, \ 3567 "Allow registration of atexit() methods") \ 3568 \ 3569 product(bool, PerfBypassFileSystemCheck, false, \ 3570 "Bypass Win32 file system criteria checks (Windows Only)") \ 3571 \ 3572 product(intx, UnguardOnExecutionViolation, 0, \ 3573 "Unguard page and retry on no-execute fault (Win32 only)" \ 3574 "0=off, 1=conservative, 2=aggressive") \ 3575 \ 3576 /* Serviceability Support */ \ 3577 \ 3578 product(bool, ManagementServer, false, \ 3579 "Create JMX Management Server") \ 3580 \ 3581 product(bool, DisableAttachMechanism, false, \ 3582 "Disable mechanism that allows tools to attach to this VM") \ 3583 \ 3584 product(bool, StartAttachListener, false, \ 3585 "Always start Attach Listener at VM startup") \ 3586 \ 3587 manageable(bool, PrintConcurrentLocks, false, \ 3588 "Print java.util.concurrent locks in thread dump") \ 3589 \ 3590 product(bool, TransmitErrorReport, false, \ 3591 "Enable error report transmission on erroneous termination") \ 3592 \ 3593 product(ccstr, ErrorReportServer, NULL, \ 3594 "Override built-in error report server address") \ 3595 \ 3596 /* Shared spaces */ \ 3597 \ 3598 product(bool, UseSharedSpaces, true, \ 3599 "Use shared spaces for metadata") \ 3600 \ 3601 product(bool, RequireSharedSpaces, false, \ 3602 "Require shared spaces for metadata") \ 3603 \ 3604 product(bool, DumpSharedSpaces, false, \ 3605 "Special mode: JVM reads a class list, loads classes, builds " \ 3606 "shared spaces, and dumps the shared spaces to a file to be " \ 3607 "used in future JVM runs.") \ 3608 \ 3609 product(bool, PrintSharedSpaces, false, \ 3610 "Print usage of shared spaces") \ 3611 \ 3612 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3613 "Size of read-write space for metadata (in bytes)") \ 3614 \ 3615 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3616 "Size of read-only space for metadata (in bytes)") \ 3617 \ 3618 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3619 "Size of the shared miscellaneous data area (in bytes)") \ 3620 \ 3621 product(uintx, SharedMiscCodeSize, 120*K, \ 3622 "Size of the shared miscellaneous code area (in bytes)") \ 3623 \ 3624 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 3625 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3626 "Address to allocate shared memory region for class data") \ 3627 \ 3628 diagnostic(bool, EnableInvokeDynamic, true, \ 3629 "support JSR 292 (method handles, invokedynamic, " \ 3630 "anonymous classes") \ 3631 \ 3632 diagnostic(bool, PrintMethodHandleStubs, false, \ 3633 "Print generated stub code for method handles") \ 3634 \ 3635 develop(bool, TraceMethodHandles, false, \ 3636 "trace internal method handle operations") \ 3637 \ 3638 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3639 "perform extra checks when constructing method handles") \ 3640 \ 3641 diagnostic(bool, ShowHiddenFrames, false, \ 3642 "show method handle implementation frames (usually hidden)") \ 3643 \ 3644 experimental(bool, TrustFinalNonStaticFields, false, \ 3645 "trust final non-static declarations for constant folding") \ 3646 \ 3647 develop(bool, TraceInvokeDynamic, false, \ 3648 "trace internal invoke dynamic operations") \ 3649 \ 3650 diagnostic(bool, PauseAtStartup, false, \ 3651 "Causes the VM to pause at startup time and wait for the pause " \ 3652 "file to be removed (default: ./vm.paused.<pid>)") \ 3653 \ 3654 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3655 "The file to create and for whose removal to await when pausing " \ 3656 "at startup. (default: ./vm.paused.<pid>)") \ 3657 \ 3658 diagnostic(bool, PauseAtExit, false, \ 3659 "Pause and wait for keypress on exit if a debugger is attached") \ 3660 \ 3661 product(bool, ExtendedDTraceProbes, false, \ 3662 "Enable performance-impacting dtrace probes") \ 3663 \ 3664 product(bool, DTraceMethodProbes, false, \ 3665 "Enable dtrace probes for method-entry and method-exit") \ 3666 \ 3667 product(bool, DTraceAllocProbes, false, \ 3668 "Enable dtrace probes for object allocation") \ 3669 \ 3670 product(bool, DTraceMonitorProbes, false, \ 3671 "Enable dtrace probes for monitor events") \ 3672 \ 3673 product(bool, RelaxAccessControlCheck, false, \ 3674 "Relax the access control checks in the verifier") \ 3675 \ 3676 diagnostic(bool, PrintDTraceDOF, false, \ 3677 "Print the DTrace DOF passed to the system for JSDT probes") \ 3678 \ 3679 product(uintx, StringTableSize, defaultStringTableSize, \ 3680 "Number of buckets in the interned String table") \ 3681 \ 3682 develop(bool, TraceDefaultMethods, false, \ 3683 "Trace the default method processing steps") \ 3684 \ 3685 develop(bool, ParseAllGenericSignatures, false, \ 3686 "Parse all generic signatures while classloading") \ 3687 \ 3688 develop(bool, VerifyGenericSignatures, false, \ 3689 "Abort VM on erroneous or inconsistent generic signatures") \ 3690 \ 3691 product(bool, ParseGenericDefaults, false, \ 3692 "Parse generic signatures for default method handling") \ 3693 \ 3694 product(bool, UseVMInterruptibleIO, false, \ 3695 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3696 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3697 " of this flag is true for JDK 6 and earlier") \ 3698 \ 3699 diagnostic(bool, WhiteBoxAPI, false, \ 3700 "Enable internal testing APIs") \ 3701 \ 3702 product(bool, PrintGCCause, true, \ 3703 "Include GC cause in GC logging") \ 3704 \ 3705 product(bool , AllowNonVirtualCalls, false, \ 3706 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 3707 \ 3708 diagnostic(ccstr, SharedArchiveFile, NULL, \ 3709 "Override the default location of the CDS archive file") \ 3710 \ 3711 experimental(uintx, ArrayAllocatorMallocLimit, \ 3712 SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \ 3713 "Allocation less than this value will be allocated " \ 3714 "using malloc. Larger allocations will use mmap.") \ 3715 \ 3716 product(bool, EnableTracing, false, \ 3717 "Enable event-based tracing") \ 3718 product(bool, UseLockedTracing, false, \ 3719 "Use locked-tracing when doing event-based tracing") 3720 3721 3722/* 3723 * Macros for factoring of globals 3724 */ 3725 3726// Interface macros 3727#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3728#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3729#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3730#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3731#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3732#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3733#ifdef PRODUCT 3734#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3735#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3736#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3737#else 3738#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3739#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3740#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3741#endif 3742// Special LP64 flags, product only needed for now. 3743#ifdef _LP64 3744#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3745#else 3746#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3747#endif // _LP64 3748 3749// Implementation macros 3750#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3751#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3752#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3753#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3754#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3755#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3756#ifdef PRODUCT 3757#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3758#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3759#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3760#else 3761#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3762#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3763#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3764#endif 3765#ifdef _LP64 3766#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3767#else 3768#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3769#endif // _LP64 3770 3771RUNTIME_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) 3772 3773RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3774 3775ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3776 3777// Extensions 3778 3779#include "runtime/globals_ext.hpp" 3780 3781#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3782