globals.hpp revision 4268:b5cb079ecaa4
1223637Sbz/* 2126258Smlaier * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3126258Smlaier * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4126258Smlaier * 5126258Smlaier * This code is free software; you can redistribute it and/or modify it 6126258Smlaier * under the terms of the GNU General Public License version 2 only, as 7126258Smlaier * published by the Free Software Foundation. 8126258Smlaier * 9126258Smlaier * This code is distributed in the hope that it will be useful, but WITHOUT 10126258Smlaier * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11126258Smlaier * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12126258Smlaier * version 2 for more details (a copy is included in the LICENSE file that 13126258Smlaier * accompanied this code). 14126258Smlaier * 15126258Smlaier * You should have received a copy of the GNU General Public License version 16126258Smlaier * 2 along with this work; if not, write to the Free Software Foundation, 17126258Smlaier * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18126258Smlaier * 19126258Smlaier * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20126258Smlaier * or visit www.oracle.com if you need additional information or have any 21126258Smlaier * questions. 22126258Smlaier * 23126258Smlaier */ 24126258Smlaier 25126258Smlaier#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26126258Smlaier#define SHARE_VM_RUNTIME_GLOBALS_HPP 27126258Smlaier 28126258Smlaier#include "utilities/debug.hpp" 29126258Smlaier 30126258Smlaier// use this for flags that are true per default in the tiered build 31126258Smlaier// but false in non-tiered builds, and vice versa 32126258Smlaier#ifdef TIERED 33127145Smlaier#define trueInTiered true 34126261Smlaier#define falseInTiered false 35126261Smlaier#else 36171168Smlaier#define trueInTiered false 37171168Smlaier#define falseInTiered true 38171168Smlaier#endif 39126261Smlaier 40126261Smlaier#ifdef TARGET_ARCH_x86 41126258Smlaier# include "globals_x86.hpp" 42126258Smlaier#endif 43126258Smlaier#ifdef TARGET_ARCH_sparc 44126258Smlaier# include "globals_sparc.hpp" 45126258Smlaier#endif 46127145Smlaier#ifdef TARGET_ARCH_zero 47126261Smlaier# include "globals_zero.hpp" 48223637Sbz#endif 49223637Sbz#ifdef TARGET_ARCH_arm 50126261Smlaier# include "globals_arm.hpp" 51126258Smlaier#endif 52126258Smlaier#ifdef TARGET_ARCH_ppc 53126258Smlaier# include "globals_ppc.hpp" 54126258Smlaier#endif 55127145Smlaier#ifdef TARGET_OS_FAMILY_linux 56126258Smlaier# include "globals_linux.hpp" 57126261Smlaier#endif 58126258Smlaier#ifdef TARGET_OS_FAMILY_solaris 59126258Smlaier# include "globals_solaris.hpp" 60223637Sbz#endif 61126258Smlaier#ifdef TARGET_OS_FAMILY_windows 62126258Smlaier# include "globals_windows.hpp" 63126258Smlaier#endif 64126258Smlaier#ifdef TARGET_OS_FAMILY_bsd 65126258Smlaier# include "globals_bsd.hpp" 66126258Smlaier#endif 67130613Smlaier#ifdef TARGET_OS_ARCH_linux_x86 68130613Smlaier# include "globals_linux_x86.hpp" 69130613Smlaier#endif 70130613Smlaier#ifdef TARGET_OS_ARCH_linux_sparc 71130613Smlaier# include "globals_linux_sparc.hpp" 72130613Smlaier#endif 73130613Smlaier#ifdef TARGET_OS_ARCH_linux_zero 74130613Smlaier# include "globals_linux_zero.hpp" 75130613Smlaier#endif 76130613Smlaier#ifdef TARGET_OS_ARCH_solaris_x86 77130613Smlaier# include "globals_solaris_x86.hpp" 78130613Smlaier#endif 79130613Smlaier#ifdef TARGET_OS_ARCH_solaris_sparc 80130613Smlaier# include "globals_solaris_sparc.hpp" 81130613Smlaier#endif 82130613Smlaier#ifdef TARGET_OS_ARCH_windows_x86 83130613Smlaier# include "globals_windows_x86.hpp" 84130613Smlaier#endif 85130613Smlaier#ifdef TARGET_OS_ARCH_linux_arm 86130613Smlaier# include "globals_linux_arm.hpp" 87130613Smlaier#endif 88130613Smlaier#ifdef TARGET_OS_ARCH_linux_ppc 89130613Smlaier# include "globals_linux_ppc.hpp" 90130613Smlaier#endif 91130613Smlaier#ifdef TARGET_OS_ARCH_bsd_x86 92223637Sbz# include "globals_bsd_x86.hpp" 93130613Smlaier#endif 94130613Smlaier#ifdef TARGET_OS_ARCH_bsd_zero 95130613Smlaier# include "globals_bsd_zero.hpp" 96130613Smlaier#endif 97223637Sbz#ifdef COMPILER1 98130613Smlaier#ifdef TARGET_ARCH_x86 99130613Smlaier# include "c1_globals_x86.hpp" 100130613Smlaier#endif 101130613Smlaier#ifdef TARGET_ARCH_sparc 102130613Smlaier# include "c1_globals_sparc.hpp" 103223637Sbz#endif 104130613Smlaier#ifdef TARGET_ARCH_arm 105130613Smlaier# include "c1_globals_arm.hpp" 106130613Smlaier#endif 107130613Smlaier#ifdef TARGET_ARCH_ppc 108223637Sbz# include "c1_globals_ppc.hpp" 109130613Smlaier#endif 110130613Smlaier#ifdef TARGET_OS_FAMILY_linux 111130613Smlaier# include "c1_globals_linux.hpp" 112130613Smlaier#endif 113130613Smlaier#ifdef TARGET_OS_FAMILY_solaris 114126258Smlaier# include "c1_globals_solaris.hpp" 115126258Smlaier#endif 116126258Smlaier#ifdef TARGET_OS_FAMILY_windows 117126258Smlaier# include "c1_globals_windows.hpp" 118126258Smlaier#endif 119126258Smlaier#ifdef TARGET_OS_FAMILY_bsd 120126258Smlaier# include "c1_globals_bsd.hpp" 121126258Smlaier#endif 122126258Smlaier#endif 123126258Smlaier#ifdef COMPILER2 124126258Smlaier#ifdef TARGET_ARCH_x86 125126258Smlaier# include "c2_globals_x86.hpp" 126126258Smlaier#endif 127126258Smlaier#ifdef TARGET_ARCH_sparc 128223637Sbz# include "c2_globals_sparc.hpp" 129126258Smlaier#endif 130126258Smlaier#ifdef TARGET_ARCH_arm 131126258Smlaier# include "c2_globals_arm.hpp" 132126258Smlaier#endif 133126258Smlaier#ifdef TARGET_OS_FAMILY_linux 134126258Smlaier# include "c2_globals_linux.hpp" 135223637Sbz#endif 136130613Smlaier#ifdef TARGET_OS_FAMILY_solaris 137130613Smlaier# include "c2_globals_solaris.hpp" 138126258Smlaier#endif 139126258Smlaier#ifdef TARGET_OS_FAMILY_windows 140126258Smlaier# include "c2_globals_windows.hpp" 141126258Smlaier#endif 142223637Sbz#ifdef TARGET_OS_FAMILY_bsd 143126258Smlaier# include "c2_globals_bsd.hpp" 144126258Smlaier#endif 145223637Sbz#endif 146223637Sbz#ifdef SHARK 147223637Sbz#ifdef TARGET_ARCH_zero 148126258Smlaier# include "shark_globals_zero.hpp" 149126258Smlaier#endif 150126258Smlaier#endif 151126258Smlaier 152126258Smlaier#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 153126258Smlaierdefine_pd_global(bool, BackgroundCompilation, false); 154126258Smlaierdefine_pd_global(bool, UseTLAB, false); 155126258Smlaierdefine_pd_global(bool, CICompileOSR, false); 156130613Smlaierdefine_pd_global(bool, UseTypeProfile, false); 157130613Smlaierdefine_pd_global(bool, UseOnStackReplacement, false); 158126258Smlaierdefine_pd_global(bool, InlineIntrinsics, false); 159126258Smlaierdefine_pd_global(bool, PreferInterpreterNativeStubs, true); 160126258Smlaierdefine_pd_global(bool, ProfileInterpreter, false); 161126258Smlaierdefine_pd_global(bool, ProfileTraps, false); 162126258Smlaierdefine_pd_global(bool, TieredCompilation, false); 163126258Smlaier 164130613Smlaierdefine_pd_global(intx, CompileThreshold, 0); 165126258Smlaierdefine_pd_global(intx, BackEdgeThreshold, 0); 166126258Smlaier 167130613Smlaierdefine_pd_global(intx, OnStackReplacePercentage, 0); 168126258Smlaierdefine_pd_global(bool, ResizeTLAB, false); 169223637Sbzdefine_pd_global(intx, FreqInlineSize, 0); 170223637Sbzdefine_pd_global(intx, InlineSmallCode, 0); 171223637Sbzdefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 172223637Sbzdefine_pd_global(intx, InlineClassNatives, true); 173223637Sbzdefine_pd_global(intx, InlineUnsafeOps, true); 174223637Sbzdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 175126258Smlaierdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 176223637Sbzdefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 177126258Smlaierdefine_pd_global(intx, CodeCacheMinBlockLength, 1); 178127145Smlaierdefine_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 179223637Sbzdefine_pd_global(bool, NeverActAsServerClassMachine, true); 180223637Sbzdefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 181223637Sbz#define CI_COMPILER_COUNT 0 182223637Sbz#else 183223637Sbz 184223637Sbz#ifdef COMPILER2 185223637Sbz#define CI_COMPILER_COUNT 2 186223637Sbz#else 187223637Sbz#define CI_COMPILER_COUNT 1 188223637Sbz#endif // COMPILER2 189223637Sbz 190126261Smlaier#endif // no compilers 191126258Smlaier 192126258Smlaier// string type aliases used only in this file 193223637Sbztypedef const char* ccstr; 194126258Smlaiertypedef const char* ccstrlist; // represents string arguments which accumulate 195126258Smlaier 196130613Smlaierenum FlagValueOrigin { 197126258Smlaier DEFAULT = 0, 198223637Sbz COMMAND_LINE = 1, 199126258Smlaier ENVIRON_VAR = 2, 200126258Smlaier CONFIG_FILE = 3, 201126258Smlaier MANAGEMENT = 4, 202126258Smlaier ERGONOMIC = 5, 203126258Smlaier ATTACH_ON_DEMAND = 6, 204126258Smlaier INTERNAL = 99 205126258Smlaier}; 206126258Smlaier 207126258Smlaierstruct Flag { 208145836Smlaier const char *type; 209126258Smlaier const char *name; 210126258Smlaier void* addr; 211126258Smlaier 212126258Smlaier NOT_PRODUCT(const char *doc;) 213126258Smlaier 214126258Smlaier const char *kind; 215126258Smlaier FlagValueOrigin origin; 216126258Smlaier 217130613Smlaier // points to all Flags static array 218126258Smlaier static Flag *flags; 219126258Smlaier 220126258Smlaier // number of flags 221126258Smlaier static size_t numFlags; 222126258Smlaier 223126258Smlaier static Flag* find_flag(char* name, size_t length, bool allow_locked = false); 224130613Smlaier 225145836Smlaier bool is_bool() const { return strcmp(type, "bool") == 0; } 226126258Smlaier bool get_bool() const { return *((bool*) addr); } 227126258Smlaier void set_bool(bool value) { *((bool*) addr) = value; } 228126258Smlaier 229126258Smlaier bool is_intx() const { return strcmp(type, "intx") == 0; } 230126258Smlaier intx get_intx() const { return *((intx*) addr); } 231126258Smlaier void set_intx(intx value) { *((intx*) addr) = value; } 232126258Smlaier 233126258Smlaier bool is_uintx() const { return strcmp(type, "uintx") == 0; } 234223637Sbz uintx get_uintx() const { return *((uintx*) addr); } 235126258Smlaier void set_uintx(uintx value) { *((uintx*) addr) = value; } 236126258Smlaier 237126258Smlaier bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 238126258Smlaier uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 239126258Smlaier void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 240130613Smlaier 241126258Smlaier bool is_double() const { return strcmp(type, "double") == 0; } 242126258Smlaier double get_double() const { return *((double*) addr); } 243126258Smlaier void set_double(double value) { *((double*) addr) = value; } 244126258Smlaier 245130613Smlaier bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 246126258Smlaier bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 247126258Smlaier ccstr get_ccstr() const { return *((ccstr*) addr); } 248126258Smlaier void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 249126258Smlaier 250126258Smlaier bool is_unlocker() const; 251126258Smlaier bool is_unlocked() const; 252126258Smlaier bool is_writeable() const; 253126258Smlaier bool is_external() const; 254126258Smlaier 255126258Smlaier bool is_unlocker_ext() const; 256126258Smlaier bool is_unlocked_ext() const; 257127145Smlaier bool is_writeable_ext() const; 258126258Smlaier bool is_external_ext() const; 259223637Sbz 260126258Smlaier void get_locked_message(char*, int) const; 261223637Sbz void get_locked_message_ext(char*, int) const; 262223637Sbz 263223637Sbz void print_on(outputStream* st, bool withComments = false ); 264126258Smlaier void print_as_flag(outputStream* st); 265126258Smlaier}; 266126258Smlaier 267126258Smlaier// debug flags control various aspects of the VM and are global accessible 268126258Smlaier 269126258Smlaier// use FlagSetting to temporarily change some debug flag 270126258Smlaier// e.g. FlagSetting fs(DebugThisAndThat, true); 271223637Sbz// restored to previous value upon leaving scope 272223637Sbzclass FlagSetting { 273223637Sbz bool val; 274223637Sbz bool* flag; 275223637Sbz public: 276223637Sbz FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 277223637Sbz ~FlagSetting() { *flag = val; } 278223637Sbz}; 279126258Smlaier 280126258Smlaier 281126258Smlaierclass CounterSetting { 282126258Smlaier intx* counter; 283126258Smlaier public: 284126258Smlaier CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 285126258Smlaier ~CounterSetting() { (*counter)--; } 286126258Smlaier}; 287126258Smlaier 288223637Sbz 289130613Smlaierclass IntFlagSetting { 290126258Smlaier intx val; 291126258Smlaier intx* flag; 292126258Smlaier public: 293126258Smlaier IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 294126258Smlaier ~IntFlagSetting() { *flag = val; } 295126258Smlaier}; 296126258Smlaier 297126258Smlaier 298126258Smlaierclass DoubleFlagSetting { 299126258Smlaier double val; 300126258Smlaier double* flag; 301126258Smlaier public: 302126258Smlaier DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 303126258Smlaier ~DoubleFlagSetting() { *flag = val; } 304126258Smlaier}; 305126258Smlaier 306126258Smlaier 307126258Smlaierclass CommandLineFlags { 308126258Smlaier public: 309126258Smlaier static bool boolAt(char* name, size_t len, bool* value); 310126258Smlaier static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 311126258Smlaier static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 312126258Smlaier static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 313126258Smlaier 314126258Smlaier static bool intxAt(char* name, size_t len, intx* value); 315126258Smlaier static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 316126258Smlaier static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 317126258Smlaier static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 318126258Smlaier 319126258Smlaier static bool uintxAt(char* name, size_t len, uintx* value); 320126258Smlaier static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 321223637Sbz static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 322145836Smlaier static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 323126258Smlaier 324223637Sbz static bool uint64_tAt(char* name, size_t len, uint64_t* value); 325223637Sbz static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 326130613Smlaier static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 327126258Smlaier static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 328126258Smlaier 329126258Smlaier static bool doubleAt(char* name, size_t len, double* value); 330126258Smlaier static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 331126258Smlaier static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 332126258Smlaier static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 333223637Sbz 334223637Sbz static bool ccstrAt(char* name, size_t len, ccstr* value); 335126258Smlaier static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 336126258Smlaier static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 337126258Smlaier static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 338126258Smlaier 339223637Sbz // Returns false if name is not a command line flag. 340126261Smlaier static bool wasSetOnCmdline(const char* name, bool* value); 341126258Smlaier static void printSetFlags(outputStream* out); 342126258Smlaier 343126258Smlaier static void printFlags(outputStream* out, bool withComments); 344126258Smlaier 345126258Smlaier static void verify() PRODUCT_RETURN; 346126258Smlaier}; 347126258Smlaier 348126258Smlaier// use this for flags that are true by default in the debug version but 349126258Smlaier// false in the optimized version, and vice versa 350126258Smlaier#ifdef ASSERT 351126258Smlaier#define trueInDebug true 352126258Smlaier#define falseInDebug false 353126258Smlaier#else 354126258Smlaier#define trueInDebug false 355126258Smlaier#define falseInDebug true 356223637Sbz#endif 357223637Sbz 358126258Smlaier// use this for flags that are true per default in the product build 359126258Smlaier// but false in development builds, and vice versa 360126258Smlaier#ifdef PRODUCT 361126258Smlaier#define trueInProduct true 362126258Smlaier#define falseInProduct false 363126258Smlaier#else 364126258Smlaier#define trueInProduct false 365126258Smlaier#define falseInProduct true 366126258Smlaier#endif 367126258Smlaier 368223637Sbz#ifdef JAVASE_EMBEDDED 369223637Sbz#define falseInEmbedded false 370126261Smlaier#else 371126258Smlaier#define falseInEmbedded true 372126258Smlaier#endif 373126258Smlaier 374126258Smlaier// develop flags are settable / visible only during development and are constant in the PRODUCT version 375126258Smlaier// product flags are always settable / visible 376126258Smlaier// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 377126258Smlaier 378126258Smlaier// A flag must be declared with one of the following types: 379126258Smlaier// bool, intx, uintx, ccstr. 380126258Smlaier// The type "ccstr" is an alias for "const char*" and is used 381126258Smlaier// only in this file, because the macrology requires single-token type names. 382126258Smlaier 383126258Smlaier// Note: Diagnostic options not meant for VM tuning or for product modes. 384126258Smlaier// They are to be used for VM quality assurance or field diagnosis 385126258Smlaier// of VM bugs. They are hidden so that users will not be encouraged to 386126258Smlaier// try them as if they were VM ordinary execution options. However, they 387126258Smlaier// are available in the product version of the VM. Under instruction 388126258Smlaier// from support engineers, VM customers can turn them on to collect 389130613Smlaier// diagnostic information about VM problems. To use a VM diagnostic 390126258Smlaier// option, you must first specify +UnlockDiagnosticVMOptions. 391126258Smlaier// (This master switch also affects the behavior of -Xprintflags.) 392126258Smlaier// 393126258Smlaier// experimental flags are in support of features that are not 394126258Smlaier// part of the officially supported product, but are available 395126258Smlaier// for experimenting with. They could, for example, be performance 396126258Smlaier// features that may not have undergone full or rigorous QA, but which may 397126258Smlaier// help performance in some cases and released for experimentation 398126258Smlaier// by the community of users and developers. This flag also allows one to 399126258Smlaier// be able to build a fully supported product that nonetheless also 400126258Smlaier// ships with some unsupported, lightly tested, experimental features. 401126258Smlaier// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 402223637Sbz// UnlockExperimentalVMOptions flag, which allows the control and 403126258Smlaier// modification of the experimental flags. 404223637Sbz// 405223637Sbz// Nota bene: neither diagnostic nor experimental options should be used casually, 406130613Smlaier// and they are not supported on production loads, except under explicit 407126258Smlaier// direction from support engineers. 408126258Smlaier// 409126258Smlaier// manageable flags are writeable external product flags. 410126258Smlaier// They are dynamically writeable through the JDK management interface 411126258Smlaier// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 412126258Smlaier// These flags are external exported interface (see CCC). The list of 413145836Smlaier// manageable flags can be queried programmatically through the management 414145836Smlaier// interface. 415145836Smlaier// 416145836Smlaier// A flag can be made as "manageable" only if 417145836Smlaier// - the flag is defined in a CCC as an external exported interface. 418145836Smlaier// - the VM implementation supports dynamic setting of the flag. 419145836Smlaier// This implies that the VM must *always* query the flag variable 420145836Smlaier// and not reuse state related to the flag state at any given time. 421145836Smlaier// - you want the flag to be queried programmatically by the customers. 422145836Smlaier// 423145836Smlaier// product_rw flags are writeable internal product flags. 424145836Smlaier// They are like "manageable" flags but for internal/private use. 425145836Smlaier// The list of product_rw flags are internal/private flags which 426145836Smlaier// may be changed/removed in a future release. It can be set 427145836Smlaier// through the management interface to get/set value 428145836Smlaier// when the name of flag is supplied. 429145836Smlaier// 430145836Smlaier// A flag can be made as "product_rw" only if 431145836Smlaier// - the VM implementation supports dynamic setting of the flag. 432223637Sbz// This implies that the VM must *always* query the flag variable 433145836Smlaier// and not reuse state related to the flag state at any given time. 434145836Smlaier// 435145836Smlaier// Note that when there is a need to support develop flags to be writeable, 436145836Smlaier// it can be done in the same way as product_rw. 437145836Smlaier 438145836Smlaier#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 439145836Smlaier \ 440145836Smlaier lp64_product(bool, UseCompressedOops, false, \ 441126258Smlaier "Use 32-bit object references in 64-bit VM " \ 442126258Smlaier "lp64_product means flag is always constant in 32 bit VM") \ 443223637Sbz \ 444126261Smlaier lp64_product(bool, UseCompressedKlassPointers, false, \ 445126258Smlaier "Use 32-bit klass pointers in 64-bit VM " \ 446126258Smlaier "lp64_product means flag is always constant in 32 bit VM") \ 447126258Smlaier \ 448126258Smlaier notproduct(bool, CheckCompressedOops, true, \ 449126258Smlaier "generate checks in encoding/decoding code in debug VM") \ 450126258Smlaier \ 451126258Smlaier product_pd(uintx, HeapBaseMinAddress, \ 452126258Smlaier "OS specific low limit for heap base address") \ 453126258Smlaier \ 454126258Smlaier diagnostic(bool, PrintCompressedOopsMode, false, \ 455126258Smlaier "Print compressed oops base address and encoding mode") \ 456126258Smlaier \ 457126258Smlaier lp64_product(intx, ObjectAlignmentInBytes, 8, \ 458126258Smlaier "Default object alignment in bytes, 8 is minimum") \ 459126258Smlaier \ 460126258Smlaier /* UseMembar is theoretically a temp flag used for memory barrier \ 461126258Smlaier * removal testing. It was supposed to be removed before FCS but has \ 462126258Smlaier * been re-added (see 6401008) */ \ 463126258Smlaier product_pd(bool, UseMembar, \ 464126258Smlaier "(Unstable) Issues membars on thread state transitions") \ 465223637Sbz \ 466126258Smlaier /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 467126258Smlaier * that don't support it. This will be replaced by processor detection \ 468126258Smlaier * logic. \ 469126258Smlaier */ \ 470126258Smlaier product(bool, UsePPCLWSYNC, true, \ 471126258Smlaier "Use lwsync instruction if true, else use slower sync") \ 472126258Smlaier \ 473126258Smlaier develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 474126258Smlaier "Whether to clean the chunk pool asynchronously") \ 475126258Smlaier \ 476126258Smlaier /* Temporary: See 6948537 */ \ 477126258Smlaier experimental(bool, UseMemSetInBOT, true, \ 478126258Smlaier "(Unstable) uses memset in BOT updates in GC code") \ 479126258Smlaier \ 480130613Smlaier diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 481126258Smlaier "Enable normal processing of flags relating to field diagnostics")\ 482126258Smlaier \ 483126258Smlaier experimental(bool, UnlockExperimentalVMOptions, false, \ 484126258Smlaier "Enable normal processing of flags relating to experimental features")\ 485126258Smlaier \ 486171168Smlaier product(bool, JavaMonitorsInStackTrace, true, \ 487171168Smlaier "Print info. about Java monitor locks when the stacks are dumped")\ 488126258Smlaier \ 489126258Smlaier product_pd(bool, UseLargePages, \ 490126258Smlaier "Use large page memory") \ 491126258Smlaier \ 492126258Smlaier product_pd(bool, UseLargePagesIndividualAllocation, \ 493223637Sbz "Allocate large pages individually for better affinity") \ 494145836Smlaier \ 495126258Smlaier develop(bool, LargePagesIndividualAllocationInjectError, false, \ 496223637Sbz "Fail large pages individual allocation") \ 497223637Sbz \ 498171168Smlaier develop(bool, TracePageSizes, false, \ 499171168Smlaier "Trace page size selection and usage.") \ 500126258Smlaier \ 501126258Smlaier product(bool, UseNUMA, false, \ 502126258Smlaier "Use NUMA if available") \ 503126258Smlaier \ 504126258Smlaier product(bool, UseNUMAInterleaving, false, \ 505126258Smlaier "Interleave memory across NUMA nodes if available") \ 506223637Sbz \ 507223637Sbz product(uintx, NUMAInterleaveGranularity, 2*M, \ 508126258Smlaier "Granularity to use for NUMA interleaving on Windows OS") \ 509126258Smlaier \ 510126258Smlaier product(bool, ForceNUMA, false, \ 511126258Smlaier "Force NUMA optimizations on single-node/UMA systems") \ 512126258Smlaier \ 513126258Smlaier product(intx, NUMAChunkResizeWeight, 20, \ 514126258Smlaier "Percentage (0-100) used to weight the current sample when " \ 515223637Sbz "computing exponentially decaying average for " \ 516126261Smlaier "AdaptiveNUMAChunkSizing") \ 517126258Smlaier \ 518126258Smlaier product(intx, NUMASpaceResizeRate, 1*G, \ 519126258Smlaier "Do not reallocate more that this amount per collection") \ 520126258Smlaier \ 521126258Smlaier product(bool, UseAdaptiveNUMAChunkSizing, true, \ 522126258Smlaier "Enable adaptive chunk sizing for NUMA") \ 523126258Smlaier \ 524126258Smlaier product(bool, NUMAStats, false, \ 525126258Smlaier "Print NUMA stats in detailed heap information") \ 526126258Smlaier \ 527126258Smlaier product(intx, NUMAPageScanRate, 256, \ 528126258Smlaier "Maximum number of pages to include in the page scan procedure") \ 529126258Smlaier \ 530126258Smlaier product_pd(bool, NeedsDeoptSuspend, \ 531126258Smlaier "True for register window machines (sparc/ia64)") \ 532126258Smlaier \ 533126258Smlaier product(intx, UseSSE, 99, \ 534126258Smlaier "Highest supported SSE instructions set on x86/x64") \ 535126258Smlaier \ 536126258Smlaier product(bool, UseAES, false, \ 537126258Smlaier "Control whether AES instructions can be used on x86/x64") \ 538223637Sbz \ 539223637Sbz product(uintx, LargePageSizeInBytes, 0, \ 540126258Smlaier "Large page size (0 to let VM choose the page size") \ 541126258Smlaier \ 542126258Smlaier product(uintx, LargePageHeapSizeThreshold, 128*M, \ 543126258Smlaier "Use large pages if max heap is at least this big") \ 544126258Smlaier \ 545126258Smlaier product(bool, ForceTimeHighResolution, false, \ 546126258Smlaier "Using high time resolution(For Win32 only)") \ 547126258Smlaier \ 548126258Smlaier develop(bool, TraceItables, false, \ 549126258Smlaier "Trace initialization and use of itables") \ 550126258Smlaier \ 551126258Smlaier develop(bool, TracePcPatching, false, \ 552126258Smlaier "Trace usage of frame::patch_pc") \ 553223637Sbz \ 554126258Smlaier develop(bool, TraceJumps, false, \ 555126258Smlaier "Trace assembly jumps in thread ring buffer") \ 556126258Smlaier \ 557126258Smlaier develop(bool, TraceRelocator, false, \ 558126258Smlaier "Trace the bytecode relocator") \ 559126258Smlaier \ 560126258Smlaier develop(bool, TraceLongCompiles, false, \ 561126258Smlaier "Print out every time compilation is longer than " \ 562126258Smlaier "a given threashold") \ 563126258Smlaier \ 564126258Smlaier develop(bool, SafepointALot, false, \ 565126258Smlaier "Generates a lot of safepoints. Works with " \ 566223637Sbz "GuaranteedSafepointInterval") \ 567126261Smlaier \ 568126258Smlaier product_pd(bool, BackgroundCompilation, \ 569126258Smlaier "A thread requesting compilation is not blocked during " \ 570126258Smlaier "compilation") \ 571126258Smlaier \ 572126258Smlaier product(bool, PrintVMQWaitTime, false, \ 573126258Smlaier "Prints out the waiting time in VM operation queue") \ 574126258Smlaier \ 575126258Smlaier develop(bool, NoYieldsInMicrolock, false, \ 576126258Smlaier "Disable yields in microlock") \ 577126258Smlaier \ 578126258Smlaier develop(bool, TraceOopMapGeneration, false, \ 579126258Smlaier "Shows oopmap generation") \ 580126258Smlaier \ 581126258Smlaier product(bool, MethodFlushing, true, \ 582126258Smlaier "Reclamation of zombie and not-entrant methods") \ 583126258Smlaier \ 584126258Smlaier develop(bool, VerifyStack, false, \ 585126258Smlaier "Verify stack of each thread when it is entering a runtime call") \ 586126258Smlaier \ 587126258Smlaier diagnostic(bool, ForceUnreachable, false, \ 588130613Smlaier "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 589126258Smlaier \ 590126258Smlaier notproduct(bool, StressDerivedPointers, false, \ 591126258Smlaier "Force scavenge when a derived pointers is detected on stack " \ 592126258Smlaier "after rtm call") \ 593126258Smlaier \ 594126258Smlaier develop(bool, TraceDerivedPointers, false, \ 595126258Smlaier "Trace traversal of derived pointers on stack") \ 596130613Smlaier \ 597126258Smlaier notproduct(bool, TraceCodeBlobStacks, false, \ 598126258Smlaier "Trace stack-walk of codeblobs") \ 599126258Smlaier \ 600126258Smlaier product(bool, PrintJNIResolving, false, \ 601126258Smlaier "Used to implement -v:jni") \ 602126258Smlaier \ 603126258Smlaier notproduct(bool, PrintRewrites, false, \ 604126258Smlaier "Print methods that are being rewritten") \ 605126258Smlaier \ 606126258Smlaier product(bool, UseInlineCaches, true, \ 607126258Smlaier "Use Inline Caches for virtual calls ") \ 608126258Smlaier \ 609126258Smlaier develop(bool, InlineArrayCopy, true, \ 610223637Sbz "inline arraycopy native that is known to be part of " \ 611130613Smlaier "base library DLL") \ 612126258Smlaier \ 613126258Smlaier develop(bool, InlineObjectHash, true, \ 614126258Smlaier "inline Object::hashCode() native that is known to be part " \ 615126258Smlaier "of base library DLL") \ 616126258Smlaier \ 617126258Smlaier develop(bool, InlineNatives, true, \ 618223637Sbz "inline natives that are known to be part of base library DLL") \ 619126261Smlaier \ 620126258Smlaier develop(bool, InlineMathNatives, true, \ 621126258Smlaier "inline SinD, CosD, etc.") \ 622126258Smlaier \ 623126258Smlaier develop(bool, InlineClassNatives, true, \ 624126258Smlaier "inline Class.isInstance, etc") \ 625126258Smlaier \ 626126258Smlaier develop(bool, InlineThreadNatives, true, \ 627126258Smlaier "inline Thread.currentThread, etc") \ 628126258Smlaier \ 629126258Smlaier develop(bool, InlineUnsafeOps, true, \ 630126258Smlaier "inline memory ops (native methods) from sun.misc.Unsafe") \ 631223637Sbz \ 632126261Smlaier product(bool, CriticalJNINatives, true, \ 633126258Smlaier "check for critical JNI entry points") \ 634126258Smlaier \ 635126258Smlaier notproduct(bool, StressCriticalJNINatives, false, \ 636126258Smlaier "Exercise register saving code in critical natives") \ 637126258Smlaier \ 638126258Smlaier product(bool, UseSSE42Intrinsics, false, \ 639126258Smlaier "SSE4.2 versions of intrinsics") \ 640126258Smlaier \ 641126258Smlaier product(bool, UseAESIntrinsics, false, \ 642126258Smlaier "use intrinsics for AES versions of crypto") \ 643126258Smlaier \ 644126258Smlaier develop(bool, TraceCallFixup, false, \ 645126258Smlaier "traces all call fixups") \ 646126258Smlaier \ 647223637Sbz develop(bool, DeoptimizeALot, false, \ 648130613Smlaier "deoptimize at every exit from the runtime system") \ 649126258Smlaier \ 650126258Smlaier notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 651126258Smlaier "a comma separated list of bcis to deoptimize at") \ 652126258Smlaier \ 653126258Smlaier product(bool, DeoptimizeRandom, false, \ 654126258Smlaier "deoptimize random frames on random exit from the runtime system")\ 655126258Smlaier \ 656126258Smlaier notproduct(bool, ZombieALot, false, \ 657126258Smlaier "creates zombies (non-entrant) at exit from the runt. system") \ 658126258Smlaier \ 659126258Smlaier product(bool, UnlinkSymbolsALot, false, \ 660126258Smlaier "unlink unreferenced symbols from the symbol table at safepoints")\ 661126258Smlaier \ 662130613Smlaier notproduct(bool, WalkStackALot, false, \ 663127145Smlaier "trace stack (no print) at every exit from the runtime system") \ 664126261Smlaier \ 665126261Smlaier product(bool, Debugging, false, \ 666126258Smlaier "set when executing debug methods in debug.ccp " \ 667126261Smlaier "(to prevent triggering assertions)") \ 668126258Smlaier \ 669127145Smlaier notproduct(bool, StrictSafepointChecks, trueInDebug, \ 670223637Sbz "Enable strict checks that safepoints cannot happen for threads " \ 671126261Smlaier "that used No_Safepoint_Verifier") \ 672126261Smlaier \ 673126258Smlaier notproduct(bool, VerifyLastFrame, false, \ 674126261Smlaier "Verify oops on last frame on entry to VM") \ 675126258Smlaier \ 676126258Smlaier develop(bool, TraceHandleAllocation, false, \ 677126258Smlaier "Prints out warnings when suspicious many handles are allocated") \ 678126258Smlaier \ 679126258Smlaier product(bool, UseCompilerSafepoints, true, \ 680126258Smlaier "Stop at safepoints in compiled code") \ 681126258Smlaier \ 682126258Smlaier product(bool, UseSplitVerifier, true, \ 683126258Smlaier "use split verifier with StackMapTable attributes") \ 684126258Smlaier \ 685126258Smlaier product(bool, FailOverToOldVerifier, true, \ 686126258Smlaier "fail over to old verifier when split verifier fails") \ 687126258Smlaier \ 688126258Smlaier develop(bool, ShowSafepointMsgs, false, \ 689126258Smlaier "Show msg. about safepoint synch.") \ 690126258Smlaier \ 691126258Smlaier product(bool, SafepointTimeout, false, \ 692126258Smlaier "Time out and warn or fail after SafepointTimeoutDelay " \ 693126258Smlaier "milliseconds if failed to reach safepoint") \ 694223637Sbz \ 695145836Smlaier develop(bool, DieOnSafepointTimeout, false, \ 696126258Smlaier "Die upon failure to reach safepoint (see SafepointTimeout)") \ 697223637Sbz \ 698223637Sbz /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 699130613Smlaier /* typically, at most a few retries are needed */ \ 700126258Smlaier product(intx, SuspendRetryCount, 50, \ 701126258Smlaier "Maximum retry count for an external suspend request") \ 702126258Smlaier \ 703126258Smlaier product(intx, SuspendRetryDelay, 5, \ 704126258Smlaier "Milliseconds to delay per retry (* current_retry_count)") \ 705126258Smlaier \ 706126258Smlaier product(bool, AssertOnSuspendWaitFailure, false, \ 707126258Smlaier "Assert/Guarantee on external suspend wait failure") \ 708126258Smlaier \ 709126258Smlaier product(bool, TraceSuspendWaitFailures, false, \ 710126258Smlaier "Trace external suspend wait failures") \ 711126258Smlaier \ 712126258Smlaier product(bool, MaxFDLimit, true, \ 713130613Smlaier "Bump the number of file descriptors to max in solaris.") \ 714126258Smlaier \ 715126258Smlaier diagnostic(bool, LogEvents, true, \ 716127145Smlaier "Enable the various ring buffer event logs") \ 717126261Smlaier \ 718126261Smlaier diagnostic(intx, LogEventsBufferEntries, 10, \ 719126258Smlaier "Enable the various ring buffer event logs") \ 720126261Smlaier \ 721126258Smlaier product(bool, BytecodeVerificationRemote, true, \ 722127145Smlaier "Enables the Java bytecode verifier for remote classes") \ 723126261Smlaier \ 724126261Smlaier product(bool, BytecodeVerificationLocal, false, \ 725126261Smlaier "Enables the Java bytecode verifier for local classes") \ 726126258Smlaier \ 727126261Smlaier develop(bool, ForceFloatExceptions, trueInDebug, \ 728126258Smlaier "Force exceptions on FP stack under/overflow") \ 729126258Smlaier \ 730126258Smlaier develop(bool, VerifyStackAtCalls, false, \ 731126258Smlaier "Verify that the stack pointer is unchanged after calls") \ 732126258Smlaier \ 733126258Smlaier develop(bool, TraceJavaAssertions, false, \ 734126258Smlaier "Trace java language assertions") \ 735126258Smlaier \ 736126258Smlaier notproduct(bool, CheckAssertionStatusDirectives, false, \ 737126258Smlaier "temporary - see javaClasses.cpp") \ 738126258Smlaier \ 739126258Smlaier notproduct(bool, PrintMallocFree, false, \ 740126258Smlaier "Trace calls to C heap malloc/free allocation") \ 741126258Smlaier \ 742126258Smlaier product(bool, PrintOopAddress, false, \ 743126258Smlaier "Always print the location of the oop") \ 744126258Smlaier \ 745126258Smlaier notproduct(bool, VerifyCodeCacheOften, false, \ 746126258Smlaier "Verify compiled-code cache often") \ 747126258Smlaier \ 748126258Smlaier develop(bool, ZapDeadCompiledLocals, false, \ 749126258Smlaier "Zap dead locals in compiler frames") \ 750126258Smlaier \ 751126258Smlaier notproduct(bool, ZapDeadLocalsOld, false, \ 752126258Smlaier "Zap dead locals (old version, zaps all frames when " \ 753126258Smlaier "entering the VM") \ 754223637Sbz \ 755126258Smlaier notproduct(bool, CheckOopishValues, false, \ 756223637Sbz "Warn if value contains oop ( requires ZapDeadLocals)") \ 757223637Sbz \ 758130613Smlaier develop(bool, UseMallocOnly, false, \ 759126258Smlaier "use only malloc/free for allocation (no resource area/arena)") \ 760126258Smlaier \ 761126258Smlaier develop(bool, PrintMalloc, false, \ 762126258Smlaier "print all malloc/free calls") \ 763126258Smlaier \ 764126258Smlaier develop(bool, PrintMallocStatistics, false, \ 765223637Sbz "print malloc/free statistics") \ 766126261Smlaier \ 767126258Smlaier develop(bool, ZapResourceArea, trueInDebug, \ 768126258Smlaier "Zap freed resource/arena space with 0xABABABAB") \ 769126258Smlaier \ 770126258Smlaier notproduct(bool, ZapVMHandleArea, trueInDebug, \ 771126258Smlaier "Zap freed VM handle space with 0xBCBCBCBC") \ 772126258Smlaier \ 773223637Sbz develop(bool, ZapJNIHandleArea, trueInDebug, \ 774126261Smlaier "Zap freed JNI handle space with 0xFEFEFEFE") \ 775126258Smlaier \ 776126258Smlaier notproduct(bool, ZapStackSegments, trueInDebug, \ 777126258Smlaier "Zap allocated/freed Stack segments with 0xFADFADED") \ 778126258Smlaier \ 779126258Smlaier develop(bool, ZapUnusedHeapArea, trueInDebug, \ 780126258Smlaier "Zap unused heap space with 0xBAADBABE") \ 781126258Smlaier \ 782126258Smlaier develop(bool, TraceZapUnusedHeapArea, false, \ 783126258Smlaier "Trace zapping of unused heap space") \ 784126258Smlaier \ 785126258Smlaier develop(bool, CheckZapUnusedHeapArea, false, \ 786126258Smlaier "Check zapping of unused heap space") \ 787126258Smlaier \ 788126258Smlaier develop(bool, ZapFillerObjects, trueInDebug, \ 789126258Smlaier "Zap filler objects with 0xDEAFBABE") \ 790126258Smlaier \ 791126258Smlaier develop(bool, PrintVMMessages, true, \ 792126258Smlaier "Print vm messages on console") \ 793126258Smlaier \ 794130613Smlaier product(bool, PrintGCApplicationConcurrentTime, false, \ 795126258Smlaier "Print the time the application has been running") \ 796126258Smlaier \ 797126258Smlaier product(bool, PrintGCApplicationStoppedTime, false, \ 798126258Smlaier "Print the time the application has been stopped") \ 799126258Smlaier \ 800126258Smlaier diagnostic(bool, VerboseVerification, false, \ 801126258Smlaier "Display detailed verification details") \ 802126258Smlaier \ 803126258Smlaier notproduct(uintx, ErrorHandlerTest, 0, \ 804145836Smlaier "If > 0, provokes an error after VM initialization; the value" \ 805126258Smlaier "determines which error to provoke. See test_error_handler()" \ 806126258Smlaier "in debug.cpp.") \ 807126258Smlaier \ 808126258Smlaier develop(bool, Verbose, false, \ 809145836Smlaier "Prints additional debugging information from other modes") \ 810145836Smlaier \ 811126258Smlaier develop(bool, PrintMiscellaneous, false, \ 812126258Smlaier "Prints uncategorized debugging information (requires +Verbose)") \ 813126258Smlaier \ 814126258Smlaier develop(bool, WizardMode, false, \ 815145836Smlaier "Prints much more debugging information") \ 816126258Smlaier \ 817126258Smlaier product(bool, ShowMessageBoxOnError, false, \ 818126258Smlaier "Keep process alive on VM fatal error") \ 819126258Smlaier \ 820126258Smlaier product(bool, CreateMinidumpOnCrash, false, \ 821126258Smlaier "Create minidump on VM fatal error") \ 822126258Smlaier \ 823126258Smlaier product_pd(bool, UseOSErrorReporting, \ 824126258Smlaier "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 825126258Smlaier \ 826126258Smlaier product(bool, SuppressFatalErrorMessage, false, \ 827126258Smlaier "Do NO Fatal Error report [Avoid deadlock]") \ 828126258Smlaier \ 829126258Smlaier product(ccstrlist, OnError, "", \ 830126258Smlaier "Run user-defined commands on fatal error; see VMError.cpp " \ 831126258Smlaier "for examples") \ 832126258Smlaier \ 833126258Smlaier product(ccstrlist, OnOutOfMemoryError, "", \ 834126258Smlaier "Run user-defined commands on first java.lang.OutOfMemoryError") \ 835126258Smlaier \ 836126258Smlaier manageable(bool, HeapDumpBeforeFullGC, false, \ 837126258Smlaier "Dump heap to file before any major stop-world GC") \ 838126258Smlaier \ 839126258Smlaier manageable(bool, HeapDumpAfterFullGC, false, \ 840126258Smlaier "Dump heap to file after any major stop-world GC") \ 841126258Smlaier \ 842126258Smlaier manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 843127145Smlaier "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 844126261Smlaier \ 845126261Smlaier manageable(ccstr, HeapDumpPath, NULL, \ 846126261Smlaier "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 847126258Smlaier "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 848126261Smlaier "in the working directory)") \ 849126258Smlaier \ 850126258Smlaier develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 851127145Smlaier "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 852126261Smlaier "when the heap usage is larger than this") \ 853126261Smlaier \ 854126261Smlaier develop(uintx, HeapDumpSegmentSize, 1*G, \ 855126258Smlaier "Approximate segment size when generating a segmented heap dump") \ 856126261Smlaier \ 857126258Smlaier develop(bool, BreakAtWarning, false, \ 858126258Smlaier "Execute breakpoint upon encountering VM warning") \ 859126258Smlaier \ 860126258Smlaier develop(bool, TraceVMOperation, false, \ 861126258Smlaier "Trace vm operations") \ 862126258Smlaier \ 863126258Smlaier develop(bool, UseFakeTimers, false, \ 864126258Smlaier "Tells whether the VM should use system time or a fake timer") \ 865126258Smlaier \ 866126258Smlaier product(ccstr, NativeMemoryTracking, "off", \ 867126258Smlaier "Native memory tracking options") \ 868126258Smlaier \ 869127145Smlaier diagnostic(bool, PrintNMTStatistics, false, \ 870126261Smlaier "Print native memory tracking summary data if it is on") \ 871126261Smlaier \ 872126258Smlaier diagnostic(bool, LogCompilation, false, \ 873126261Smlaier "Log compilation activity in detail to hotspot.log or LogFile") \ 874126258Smlaier \ 875127145Smlaier product(bool, PrintCompilation, false, \ 876126261Smlaier "Print compilations") \ 877126261Smlaier \ 878126258Smlaier diagnostic(bool, TraceNMethodInstalls, false, \ 879126261Smlaier "Trace nmethod intallation") \ 880126258Smlaier \ 881126258Smlaier diagnostic(intx, ScavengeRootsInCode, 2, \ 882126258Smlaier "0: do not allow scavengable oops in the code cache; " \ 883126258Smlaier "1: allow scavenging from the code cache; " \ 884126258Smlaier "2: emit as many constants as the compiler can see") \ 885126258Smlaier \ 886126258Smlaier product(bool, AlwaysRestoreFPU, false, \ 887126258Smlaier "Restore the FPU control word after every JNI call (expensive)") \ 888223637Sbz \ 889223637Sbz diagnostic(bool, PrintCompilation2, false, \ 890223637Sbz "Print additional statistics per compilation") \ 891223637Sbz \ 892223637Sbz diagnostic(bool, PrintAdapterHandlers, false, \ 893126258Smlaier "Print code generated for i2c/c2i adapters") \ 894126258Smlaier \ 895126258Smlaier diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 896126258Smlaier "Verify that i2c/c2i adapters are called properly") \ 897126258Smlaier \ 898126258Smlaier develop(bool, VerifyAdapterSharing, false, \ 899126258Smlaier "Verify that the code for shared adapters is the equivalent") \ 900145836Smlaier \ 901126258Smlaier diagnostic(bool, PrintAssembly, false, \ 902126258Smlaier "Print assembly code (using external disassembler.so)") \ 903126258Smlaier \ 904126258Smlaier diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 905126258Smlaier "Options string passed to disassembler.so") \ 906126258Smlaier \ 907171168Smlaier diagnostic(bool, PrintNMethods, false, \ 908226801Sglebius "Print assembly code for nmethods when generated") \ 909126261Smlaier \ 910126258Smlaier diagnostic(bool, PrintNativeNMethods, false, \ 911126258Smlaier "Print assembly code for native nmethods when generated") \ 912126258Smlaier \ 913126258Smlaier develop(bool, PrintDebugInfo, false, \ 914126258Smlaier "Print debug information for all nmethods when generated") \ 915126258Smlaier \ 916126258Smlaier develop(bool, PrintRelocations, false, \ 917126258Smlaier "Print relocation information for all nmethods when generated") \ 918126258Smlaier \ 919126258Smlaier develop(bool, PrintDependencies, false, \ 920126258Smlaier "Print dependency information for all nmethods when generated") \ 921126258Smlaier \ 922126258Smlaier develop(bool, PrintExceptionHandlers, false, \ 923126258Smlaier "Print exception handler tables for all nmethods when generated") \ 924126258Smlaier \ 925145836Smlaier develop(bool, StressCompiledExceptionHandlers, false, \ 926126258Smlaier "Exercise compiled exception handlers") \ 927126258Smlaier \ 928126258Smlaier develop(bool, InterceptOSException, false, \ 929223637Sbz "Starts debugger when an implicit OS (e.g., NULL) " \ 930238600Sglebius "exception happens") \ 931223637Sbz \ 932238600Sglebius product(bool, PrintCodeCache, false, \ 933223637Sbz "Print the code cache memory usage when exiting") \ 934145836Smlaier \ 935223637Sbz develop(bool, PrintCodeCache2, false, \ 936223637Sbz "Print detailed usage info on the code cache when exiting") \ 937126258Smlaier \ 938126258Smlaier product(bool, PrintCodeCacheOnCompilation, false, \ 939126258Smlaier "Print the code cache memory usage each time a method is compiled") \ 940126258Smlaier \ 941126258Smlaier diagnostic(bool, PrintStubCode, false, \ 942145836Smlaier "Print generated stub code") \ 943126258Smlaier \ 944126258Smlaier product(bool, StackTraceInThrowable, true, \ 945126258Smlaier "Collect backtrace in throwable when exception happens") \ 946126258Smlaier \ 947126258Smlaier product(bool, OmitStackTraceInFastThrow, true, \ 948126258Smlaier "Omit backtraces for some 'hot' exceptions in optimized code") \ 949126258Smlaier \ 950126258Smlaier product(bool, ProfilerPrintByteCodeStatistics, false, \ 951126258Smlaier "Prints byte code statictics when dumping profiler output") \ 952126258Smlaier \ 953126258Smlaier product(bool, ProfilerRecordPC, false, \ 954126258Smlaier "Collects tick for each 16 byte interval of compiled code") \ 955126258Smlaier \ 956126258Smlaier product(bool, ProfileVM, false, \ 957126258Smlaier "Profiles ticks that fall within VM (either in the VM Thread " \ 958126258Smlaier "or VM code called through stubs)") \ 959126258Smlaier \ 960126258Smlaier product(bool, ProfileIntervals, false, \ 961126258Smlaier "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 962126258Smlaier \ 963126258Smlaier notproduct(bool, ProfilerCheckIntervals, false, \ 964223637Sbz "Collect and print info on spacing of profiler ticks") \ 965223637Sbz \ 966223637Sbz develop(bool, PrintJVMWarnings, false, \ 967223637Sbz "Prints warnings for unimplemented JVM functions") \ 968223637Sbz \ 969223637Sbz product(bool, PrintWarnings, true, \ 970223637Sbz "Prints JVM warnings to output stream") \ 971223637Sbz \ 972126258Smlaier notproduct(uintx, WarnOnStalledSpinLock, 0, \ 973126258Smlaier "Prints warnings for stalled SpinLocks") \ 974126258Smlaier \ 975126258Smlaier product(bool, RegisterFinalizersAtInit, true, \ 976126258Smlaier "Register finalizable objects at end of Object.<init> or " \ 977126258Smlaier "after allocation") \ 978126258Smlaier \ 979126258Smlaier develop(bool, RegisterReferences, true, \ 980126258Smlaier "Tells whether the VM should register soft/weak/final/phantom " \ 981126258Smlaier "references") \ 982126258Smlaier \ 983126258Smlaier develop(bool, IgnoreRewrites, false, \ 984126258Smlaier "Supress rewrites of bytecodes in the oopmap generator. " \ 985126258Smlaier "This is unsafe!") \ 986126258Smlaier \ 987126258Smlaier develop(bool, PrintCodeCacheExtension, false, \ 988126258Smlaier "Print extension of code cache") \ 989126258Smlaier \ 990126258Smlaier develop(bool, UsePrivilegedStack, true, \ 991126258Smlaier "Enable the security JVM functions") \ 992126258Smlaier \ 993126258Smlaier develop(bool, ProtectionDomainVerification, true, \ 994145836Smlaier "Verifies protection domain before resolution in system " \ 995145836Smlaier "dictionary") \ 996145836Smlaier \ 997145836Smlaier product(bool, ClassUnloading, true, \ 998145836Smlaier "Do unloading of classes") \ 999145836Smlaier \ 1000145836Smlaier develop(bool, DisableStartThread, false, \ 1001145836Smlaier "Disable starting of additional Java threads " \ 1002145836Smlaier "(for debugging only)") \ 1003145836Smlaier \ 1004145836Smlaier develop(bool, MemProfiling, false, \ 1005145836Smlaier "Write memory usage profiling to log file") \ 1006145836Smlaier \ 1007145836Smlaier notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1008145836Smlaier "Prints the system dictionary at exit") \ 1009145836Smlaier \ 1010145836Smlaier experimental(intx, PredictedLoadedClassCount, 0, \ 1011145836Smlaier "Experimental: Tune loaded class cache starting size.") \ 1012145836Smlaier \ 1013145836Smlaier diagnostic(bool, UnsyncloadClass, false, \ 1014145836Smlaier "Unstable: VM calls loadClass unsynchronized. Custom " \ 1015145836Smlaier "class loader must call VM synchronized for findClass " \ 1016145836Smlaier "and defineClass.") \ 1017126258Smlaier \ 1018126258Smlaier product(bool, AlwaysLockClassLoader, false, \ 1019126258Smlaier "Require the VM to acquire the class loader lock before calling " \ 1020126258Smlaier "loadClass() even for class loaders registering " \ 1021126258Smlaier "as parallel capable") \ 1022126258Smlaier \ 1023126258Smlaier product(bool, AllowParallelDefineClass, false, \ 1024126258Smlaier "Allow parallel defineClass requests for class loaders " \ 1025126258Smlaier "registering as parallel capable") \ 1026126258Smlaier \ 1027126258Smlaier product(bool, MustCallLoadClassInternal, false, \ 1028126258Smlaier "Call loadClassInternal() rather than loadClass()") \ 1029126258Smlaier \ 1030126258Smlaier product_pd(bool, DontYieldALot, \ 1031126258Smlaier "Throw away obvious excess yield calls (for SOLARIS only)") \ 1032126258Smlaier \ 1033126258Smlaier product_pd(bool, ConvertSleepToYield, \ 1034126258Smlaier "Converts sleep(0) to thread yield " \ 1035126258Smlaier "(may be off for SOLARIS to improve GUI)") \ 1036130613Smlaier \ 1037126258Smlaier product(bool, ConvertYieldToSleep, false, \ 1038130613Smlaier "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 1039130613Smlaier "behavior (SOLARIS only)") \ 1040126258Smlaier \ 1041126258Smlaier product(bool, UseBoundThreads, true, \ 1042126258Smlaier "Bind user level threads to kernel threads (for SOLARIS only)") \ 1043126258Smlaier \ 1044126258Smlaier develop(bool, UseDetachedThreads, true, \ 1045126258Smlaier "Use detached threads that are recycled upon termination " \ 1046126258Smlaier "(for SOLARIS only)") \ 1047126258Smlaier \ 1048126258Smlaier product(bool, UseLWPSynchronization, true, \ 1049126258Smlaier "Use LWP-based instead of libthread-based synchronization " \ 1050126258Smlaier "(SPARC only)") \ 1051126258Smlaier \ 1052223637Sbz product(ccstr, SyncKnobs, NULL, \ 1053223637Sbz "(Unstable) Various monitor synchronization tunables") \ 1054223637Sbz \ 1055223637Sbz product(intx, EmitSync, 0, \ 1056223637Sbz "(Unsafe,Unstable) " \ 1057223637Sbz " Controls emission of inline sync fast-path code") \ 1058223637Sbz \ 1059223637Sbz product(intx, MonitorBound, 0, "Bound Monitor population") \ 1060126258Smlaier \ 1061126258Smlaier product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1062126258Smlaier \ 1063126258Smlaier product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 1064126258Smlaier \ 1065126258Smlaier product(intx, SyncVerbose, 0, "(Unstable)" ) \ 1066130613Smlaier \ 1067126258Smlaier product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 1068126258Smlaier \ 1069126258Smlaier product(intx, hashCode, 5, \ 1070126258Smlaier "(Unstable) select hashCode generation algorithm" ) \ 1071126258Smlaier \ 1072223637Sbz product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1073126261Smlaier "(Unstable, Linux-specific)" \ 1074126258Smlaier " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 1075223637Sbz \ 1076126261Smlaier product(bool, FilterSpuriousWakeups, true, \ 1077126258Smlaier "Prevent spurious or premature wakeups from object.wait " \ 1078126258Smlaier "(Solaris only)") \ 1079126258Smlaier \ 1080126258Smlaier product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1081126258Smlaier product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1082126258Smlaier product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1083126258Smlaier \ 1084126258Smlaier develop(bool, UsePthreads, false, \ 1085126258Smlaier "Use pthread-based instead of libthread-based synchronization " \ 1086126258Smlaier "(SPARC only)") \ 1087126258Smlaier \ 1088126258Smlaier product(bool, AdjustConcurrency, false, \ 1089145836Smlaier "call thr_setconcurrency at thread create time to avoid " \ 1090145836Smlaier "LWP starvation on MP systems (For Solaris Only)") \ 1091126258Smlaier \ 1092126258Smlaier product(bool, ReduceSignalUsage, false, \ 1093126258Smlaier "Reduce the use of OS signals in Java and/or the VM") \ 1094126258Smlaier \ 1095126258Smlaier develop_pd(bool, ShareVtableStubs, \ 1096145836Smlaier "Share vtable stubs (smaller code but worse branch prediction") \ 1097126258Smlaier \ 1098126258Smlaier develop(bool, LoadLineNumberTables, true, \ 1099126258Smlaier "Tells whether the class file parser loads line number tables") \ 1100126258Smlaier \ 1101126258Smlaier develop(bool, LoadLocalVariableTables, true, \ 1102126258Smlaier "Tells whether the class file parser loads local variable tables")\ 1103126258Smlaier \ 1104126258Smlaier develop(bool, LoadLocalVariableTypeTables, true, \ 1105126258Smlaier "Tells whether the class file parser loads local variable type tables")\ 1106126258Smlaier \ 1107126258Smlaier product(bool, AllowUserSignalHandlers, false, \ 1108126258Smlaier "Do not complain if the application installs signal handlers " \ 1109126258Smlaier "(Solaris & Linux only)") \ 1110223637Sbz \ 1111223637Sbz product(bool, UseSignalChaining, true, \ 1112223637Sbz "Use signal-chaining to invoke signal handlers installed " \ 1113223637Sbz "by the application (Solaris & Linux only)") \ 1114223637Sbz \ 1115126258Smlaier product(bool, UseAltSigs, false, \ 1116126258Smlaier "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1117126258Smlaier "internal signals (Solaris only)") \ 1118126258Smlaier \ 1119126258Smlaier product(bool, AllowJNIEnvProxy, false, \ 1120145836Smlaier "Allow JNIEnv proxies for jdbx") \ 1121126258Smlaier \ 1122126258Smlaier product(bool, JNIDetachReleasesMonitors, true, \ 1123126258Smlaier "JNI DetachCurrentThread releases monitors owned by thread") \ 1124171168Smlaier \ 1125226801Sglebius product(bool, RestoreMXCSROnJNICalls, false, \ 1126126261Smlaier "Restore MXCSR when returning from JNI calls") \ 1127126258Smlaier \ 1128126258Smlaier product(bool, CheckJNICalls, false, \ 1129223637Sbz "Verify all arguments to JNI calls") \ 1130126258Smlaier \ 1131223637Sbz product(bool, UseFastJNIAccessors, true, \ 1132223637Sbz "Use optimized versions of Get<Primitive>Field") \ 1133223637Sbz \ 1134126258Smlaier product(bool, EagerXrunInit, false, \ 1135223637Sbz "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1136126258Smlaier " but not all -Xrun libraries may support the state of the VM at this time") \ 1137223637Sbz \ 1138223637Sbz product(bool, PreserveAllAnnotations, false, \ 1139223637Sbz "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1140126258Smlaier \ 1141126258Smlaier develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1142126258Smlaier "Number of OutOfMemoryErrors preallocated with backtrace") \ 1143126258Smlaier \ 1144126258Smlaier product(bool, LazyBootClassLoader, true, \ 1145126258Smlaier "Enable/disable lazy opening of boot class path entries") \ 1146126258Smlaier \ 1147126258Smlaier product(bool, UseXMMForArrayCopy, false, \ 1148126258Smlaier "Use SSE2 MOVQ instruction for Arraycopy") \ 1149126258Smlaier \ 1150223637Sbz product(intx, FieldsAllocationStyle, 1, \ 1151223637Sbz "0 - type based with oops first, 1 - with oops last, " \ 1152223637Sbz "2 - oops in super and sub classes are together") \ 1153223637Sbz \ 1154223637Sbz product(bool, CompactFields, true, \ 1155126258Smlaier "Allocate nonstatic fields in gaps between previous fields") \ 1156126258Smlaier \ 1157126258Smlaier notproduct(bool, PrintCompactFieldsSavings, false, \ 1158126258Smlaier "Print how many words were saved with CompactFields") \ 1159145836Smlaier \ 1160126258Smlaier notproduct(bool, PrintFieldLayout, false, \ 1161126258Smlaier "Print field layout for each class") \ 1162126258Smlaier \ 1163171168Smlaier product(intx, ContendedPaddingWidth, 128, \ 1164226801Sglebius "How many bytes to pad the fields/classes marked @Contended with")\ 1165126261Smlaier \ 1166126258Smlaier product(bool, EnableContended, true, \ 1167126258Smlaier "Enable @Contended annotation support") \ 1168145836Smlaier \ 1169126258Smlaier product(bool, RestrictContended, true, \ 1170145836Smlaier "Restrict @Contended to trusted classes") \ 1171145836Smlaier \ 1172145836Smlaier product(bool, UseBiasedLocking, true, \ 1173126258Smlaier "Enable biased locking in JVM") \ 1174145836Smlaier \ 1175126258Smlaier product(intx, BiasedLockingStartupDelay, 4000, \ 1176145836Smlaier "Number of milliseconds to wait before enabling biased locking") \ 1177145836Smlaier \ 1178145836Smlaier diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1179126258Smlaier "Print statistics of biased locking in JVM") \ 1180126258Smlaier \ 1181126258Smlaier product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1182126258Smlaier "Threshold of number of revocations per type to try to " \ 1183126258Smlaier "rebias all objects in the heap of that type") \ 1184126258Smlaier \ 1185126258Smlaier product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1186126258Smlaier "Threshold of number of revocations per type to permanently " \ 1187126258Smlaier "revoke biases of all objects in the heap of that type") \ 1188126258Smlaier \ 1189126258Smlaier product(intx, BiasedLockingDecayTime, 25000, \ 1190126258Smlaier "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1191126258Smlaier "type after previous bulk rebias") \ 1192126258Smlaier \ 1193126258Smlaier /* tracing */ \ 1194126258Smlaier \ 1195126258Smlaier notproduct(bool, TraceRuntimeCalls, false, \ 1196126258Smlaier "Trace run-time calls") \ 1197126258Smlaier \ 1198126258Smlaier develop(bool, TraceJNICalls, false, \ 1199145836Smlaier "Trace JNI calls") \ 1200126258Smlaier \ 1201126258Smlaier notproduct(bool, TraceJVMCalls, false, \ 1202126258Smlaier "Trace JVM calls") \ 1203126258Smlaier \ 1204126258Smlaier product(ccstr, TraceJVMTI, NULL, \ 1205126258Smlaier "Trace flags for JVMTI functions and events") \ 1206126258Smlaier \ 1207126258Smlaier /* This option can change an EMCP method into an obsolete method. */ \ 1208130613Smlaier /* This can affect tests that except specific methods to be EMCP. */ \ 1209126258Smlaier /* This option should be used with caution. */ \ 1210126258Smlaier product(bool, StressLdcRewrite, false, \ 1211126258Smlaier "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1212126258Smlaier \ 1213126258Smlaier product(intx, TraceRedefineClasses, 0, \ 1214126258Smlaier "Trace level for JVMTI RedefineClasses") \ 1215126258Smlaier \ 1216126258Smlaier develop(bool, StressMethodComparator, false, \ 1217130613Smlaier "run the MethodComparator on all loaded methods") \ 1218126258Smlaier \ 1219126258Smlaier /* change to false by default sometime after Mustang */ \ 1220126258Smlaier product(bool, VerifyMergedCPBytecodes, true, \ 1221126258Smlaier "Verify bytecodes after RedefineClasses constant pool merging") \ 1222126258Smlaier \ 1223126258Smlaier develop(bool, TraceJNIHandleAllocation, false, \ 1224126258Smlaier "Trace allocation/deallocation of JNI handle blocks") \ 1225126258Smlaier \ 1226126258Smlaier develop(bool, TraceThreadEvents, false, \ 1227223637Sbz "Trace all thread events") \ 1228126258Smlaier \ 1229126258Smlaier develop(bool, TraceBytecodes, false, \ 1230126258Smlaier "Trace bytecode execution") \ 1231126258Smlaier \ 1232126258Smlaier develop(bool, TraceClassInitialization, false, \ 1233126258Smlaier "Trace class initialization") \ 1234126258Smlaier \ 1235126258Smlaier develop(bool, TraceExceptions, false, \ 1236126258Smlaier "Trace exceptions") \ 1237126258Smlaier \ 1238126258Smlaier develop(bool, TraceICs, false, \ 1239223637Sbz "Trace inline cache changes") \ 1240223637Sbz \ 1241223637Sbz notproduct(bool, TraceInvocationCounterOverflow, false, \ 1242223637Sbz "Trace method invocation counter overflow") \ 1243223637Sbz \ 1244223637Sbz develop(bool, TraceInlineCacheClearing, false, \ 1245223637Sbz "Trace clearing of inline caches in nmethods") \ 1246223637Sbz \ 1247223637Sbz develop(bool, TraceDependencies, false, \ 1248223637Sbz "Trace dependencies") \ 1249126258Smlaier \ 1250126258Smlaier develop(bool, VerifyDependencies, trueInDebug, \ 1251126258Smlaier "Exercise and verify the compilation dependency mechanism") \ 1252223637Sbz \ 1253126261Smlaier develop(bool, TraceNewOopMapGeneration, false, \ 1254126258Smlaier "Trace OopMapGeneration") \ 1255126258Smlaier \ 1256126258Smlaier develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1257126258Smlaier "Trace OopMapGeneration: print detailed cell states") \ 1258126258Smlaier \ 1259126258Smlaier develop(bool, TimeOopMap, false, \ 1260126258Smlaier "Time calls to GenerateOopMap::compute_map() in sum") \ 1261126258Smlaier \ 1262126258Smlaier develop(bool, TimeOopMap2, false, \ 1263126258Smlaier "Time calls to GenerateOopMap::compute_map() individually") \ 1264126258Smlaier \ 1265130613Smlaier develop(bool, TraceMonitorMismatch, false, \ 1266130613Smlaier "Trace monitor matching failures during OopMapGeneration") \ 1267130613Smlaier \ 1268130613Smlaier develop(bool, TraceOopMapRewrites, false, \ 1269223637Sbz "Trace rewritting of method oops during oop map generation") \ 1270223637Sbz \ 1271223637Sbz develop(bool, TraceSafepoint, false, \ 1272130613Smlaier "Trace safepoint operations") \ 1273223637Sbz \ 1274130613Smlaier develop(bool, TraceICBuffer, false, \ 1275130613Smlaier "Trace usage of IC buffer") \ 1276130613Smlaier \ 1277223637Sbz develop(bool, TraceCompiledIC, false, \ 1278223637Sbz "Trace changes of compiled IC") \ 1279223637Sbz \ 1280130613Smlaier notproduct(bool, TraceZapDeadLocals, false, \ 1281223637Sbz "Trace zapping dead locals") \ 1282145836Smlaier \ 1283130613Smlaier develop(bool, TraceStartupTime, false, \ 1284130613Smlaier "Trace setup time") \ 1285223637Sbz \ 1286223637Sbz develop(bool, TraceProtectionDomainVerification, false, \ 1287223637Sbz "Trace protection domain verifcation") \ 1288130613Smlaier \ 1289223637Sbz develop(bool, TraceClearedExceptions, false, \ 1290130613Smlaier "Prints when an exception is forcibly cleared") \ 1291130613Smlaier \ 1292130613Smlaier product(bool, TraceClassResolution, false, \ 1293223637Sbz "Trace all constant pool resolutions (for debugging)") \ 1294223637Sbz \ 1295223637Sbz product(bool, TraceBiasedLocking, false, \ 1296130613Smlaier "Trace biased locking in JVM") \ 1297223637Sbz \ 1298130613Smlaier product(bool, TraceMonitorInflation, false, \ 1299130613Smlaier "Trace monitor inflation in JVM") \ 1300126258Smlaier \ 1301126258Smlaier /* gc */ \ 1302126258Smlaier \ 1303126258Smlaier product(bool, UseSerialGC, false, \ 1304126258Smlaier "Use the serial garbage collector") \ 1305126258Smlaier \ 1306126258Smlaier product(bool, UseG1GC, false, \ 1307126258Smlaier "Use the Garbage-First garbage collector") \ 1308126258Smlaier \ 1309223637Sbz product(bool, UseParallelGC, false, \ 1310126258Smlaier "Use the Parallel Scavenge garbage collector") \ 1311223637Sbz \ 1312223637Sbz product(bool, UseParallelOldGC, false, \ 1313145836Smlaier "Use the Parallel Old garbage collector") \ 1314145836Smlaier \ 1315126258Smlaier product(uintx, HeapMaximumCompactionInterval, 20, \ 1316126258Smlaier "How often should we maximally compact the heap (not allowing " \ 1317126258Smlaier "any dead space)") \ 1318126258Smlaier \ 1319126258Smlaier product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1320126258Smlaier "The collection count for the first maximum compaction") \ 1321126258Smlaier \ 1322130613Smlaier product(bool, UseMaximumCompactionOnSystemGC, true, \ 1323130613Smlaier "In the Parallel Old garbage collector maximum compaction for " \ 1324126258Smlaier "a system GC") \ 1325126258Smlaier \ 1326126258Smlaier product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1327126258Smlaier "The mean used by the par compact dead wood" \ 1328126258Smlaier "limiter (a number between 0-100).") \ 1329126258Smlaier \ 1330126258Smlaier product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1331126258Smlaier "The standard deviation used by the par compact dead wood" \ 1332126258Smlaier "limiter (a number between 0-100).") \ 1333126258Smlaier \ 1334126258Smlaier product(uintx, ParallelGCThreads, 0, \ 1335126258Smlaier "Number of parallel threads parallel gc will use") \ 1336126258Smlaier \ 1337126258Smlaier product(bool, UseDynamicNumberOfGCThreads, false, \ 1338126258Smlaier "Dynamically choose the number of parallel threads " \ 1339126258Smlaier "parallel gc will use") \ 1340126258Smlaier \ 1341126258Smlaier diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1342126258Smlaier "Force dynamic selection of the number of" \ 1343126258Smlaier "parallel threads parallel gc will use to aid debugging") \ 1344126258Smlaier \ 1345126258Smlaier product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1346126258Smlaier "Size of heap (bytes) per GC thread used in calculating the " \ 1347223637Sbz "number of GC threads") \ 1348145836Smlaier \ 1349126258Smlaier product(bool, TraceDynamicGCThreads, false, \ 1350223637Sbz "Trace the dynamic GC thread usage") \ 1351126258Smlaier \ 1352126258Smlaier develop(bool, ParallelOldGCSplitALot, false, \ 1353126258Smlaier "Provoke splitting (copying data from a young gen space to" \ 1354223637Sbz "multiple destination spaces)") \ 1355126261Smlaier \ 1356130613Smlaier develop(uintx, ParallelOldGCSplitInterval, 3, \ 1357130613Smlaier "How often to provoke splitting a young gen space") \ 1358126258Smlaier \ 1359126258Smlaier product(uintx, ConcGCThreads, 0, \ 1360126258Smlaier "Number of threads concurrent gc will use") \ 1361126258Smlaier \ 1362223637Sbz product(uintx, YoungPLABSize, 4096, \ 1363223637Sbz "Size of young gen promotion labs (in HeapWords)") \ 1364126258Smlaier \ 1365126258Smlaier product(uintx, OldPLABSize, 1024, \ 1366126258Smlaier "Size of old gen promotion labs (in HeapWords)") \ 1367126258Smlaier \ 1368126258Smlaier product(uintx, GCTaskTimeStampEntries, 200, \ 1369126258Smlaier "Number of time stamp entries per gc worker thread") \ 1370126258Smlaier \ 1371126258Smlaier product(bool, AlwaysTenure, false, \ 1372126258Smlaier "Always tenure objects in eden. (ParallelGC only)") \ 1373126258Smlaier \ 1374126258Smlaier product(bool, NeverTenure, false, \ 1375126258Smlaier "Never tenure objects in eden, May tenure on overflow " \ 1376126258Smlaier "(ParallelGC only)") \ 1377126258Smlaier \ 1378126258Smlaier product(bool, ScavengeBeforeFullGC, true, \ 1379126258Smlaier "Scavenge youngest generation before each full GC, " \ 1380126258Smlaier "used with UseParallelGC") \ 1381126258Smlaier \ 1382126258Smlaier develop(bool, ScavengeWithObjectsInToSpace, false, \ 1383126258Smlaier "Allow scavenges to occur when to_space contains objects.") \ 1384126258Smlaier \ 1385126258Smlaier product(bool, UseConcMarkSweepGC, false, \ 1386126258Smlaier "Use Concurrent Mark-Sweep GC in the old generation") \ 1387126258Smlaier \ 1388126258Smlaier product(bool, ExplicitGCInvokesConcurrent, false, \ 1389223637Sbz "A System.gc() request invokes a concurrent collection;" \ 1390223637Sbz " (effective only when UseConcMarkSweepGC)") \ 1391126258Smlaier \ 1392126258Smlaier product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1393126258Smlaier "A System.gc() request invokes a concurrent collection and " \ 1394126258Smlaier "also unloads classes during such a concurrent gc cycle " \ 1395126258Smlaier "(effective only when UseConcMarkSweepGC)") \ 1396126258Smlaier \ 1397126258Smlaier product(bool, GCLockerInvokesConcurrent, false, \ 1398126258Smlaier "The exit of a JNI CS necessitating a scavenge also" \ 1399126258Smlaier " kicks off a bkgrd concurrent collection") \ 1400126258Smlaier \ 1401126258Smlaier product(uintx, GCLockerEdenExpansionPercent, 5, \ 1402126258Smlaier "How much the GC can expand the eden by while the GC locker " \ 1403126258Smlaier "is active (as a percentage)") \ 1404126258Smlaier \ 1405126258Smlaier develop(bool, UseCMSAdaptiveFreeLists, true, \ 1406126258Smlaier "Use Adaptive Free Lists in the CMS generation") \ 1407126258Smlaier \ 1408126258Smlaier develop(bool, UseAsyncConcMarkSweepGC, true, \ 1409126258Smlaier "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1410126258Smlaier \ 1411126258Smlaier develop(bool, RotateCMSCollectionTypes, false, \ 1412126258Smlaier "Rotate the CMS collections among concurrent and STW") \ 1413126258Smlaier \ 1414126258Smlaier product(bool, UseCMSBestFit, true, \ 1415126258Smlaier "Use CMS best fit allocation strategy") \ 1416126258Smlaier \ 1417126258Smlaier product(bool, UseCMSCollectionPassing, true, \ 1418126258Smlaier "Use passing of collection from background to foreground") \ 1419126258Smlaier \ 1420126258Smlaier product(bool, UseParNewGC, false, \ 1421126258Smlaier "Use parallel threads in the new generation.") \ 1422126258Smlaier \ 1423126258Smlaier product(bool, ParallelGCVerbose, false, \ 1424126258Smlaier "Verbose output for parallel GC.") \ 1425126258Smlaier \ 1426126258Smlaier product(intx, ParallelGCBufferWastePct, 10, \ 1427126258Smlaier "wasted fraction of parallel allocation buffer.") \ 1428126258Smlaier \ 1429223637Sbz diagnostic(bool, ParallelGCRetainPLAB, false, \ 1430126258Smlaier "Retain parallel allocation buffers across scavenges; " \ 1431223637Sbz " -- disabled because this currently conflicts with " \ 1432126258Smlaier " parallel card scanning under certain conditions ") \ 1433126258Smlaier \ 1434223637Sbz product(intx, TargetPLABWastePct, 10, \ 1435126261Smlaier "target wasted space in last buffer as pct of overall allocation")\ 1436130613Smlaier \ 1437130613Smlaier product(uintx, PLABWeight, 75, \ 1438126258Smlaier "Percentage (0-100) used to weight the current sample when" \ 1439126258Smlaier "computing exponentially decaying average for ResizePLAB.") \ 1440126258Smlaier \ 1441126258Smlaier product(bool, ResizePLAB, true, \ 1442126258Smlaier "Dynamically resize (survivor space) promotion labs") \ 1443126258Smlaier \ 1444126258Smlaier product(bool, PrintPLAB, false, \ 1445126258Smlaier "Print (survivor space) promotion labs sizing decisions") \ 1446126258Smlaier \ 1447126258Smlaier product(intx, ParGCArrayScanChunk, 50, \ 1448126258Smlaier "Scan a subset and push remainder, if array is bigger than this") \ 1449126258Smlaier \ 1450126258Smlaier product(bool, ParGCUseLocalOverflow, false, \ 1451126258Smlaier "Instead of a global overflow list, use local overflow stacks") \ 1452126258Smlaier \ 1453126258Smlaier product(bool, ParGCTrimOverflow, true, \ 1454126258Smlaier "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1455126258Smlaier \ 1456126258Smlaier notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1457126258Smlaier "Whether we should simulate work queue overflow in ParNew") \ 1458126258Smlaier \ 1459126258Smlaier notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1460126258Smlaier "An `interval' counter that determines how frequently " \ 1461126258Smlaier "we simulate overflow; a smaller number increases frequency") \ 1462126258Smlaier \ 1463126258Smlaier product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1464126258Smlaier "The desired number of objects to claim from the overflow list") \ 1465126258Smlaier \ 1466126258Smlaier diagnostic(uintx, ParGCStridesPerThread, 2, \ 1467126258Smlaier "The number of strides per worker thread that we divide up the " \ 1468126258Smlaier "card table scanning work into") \ 1469126258Smlaier \ 1470126258Smlaier diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1471223637Sbz "The number of cards in each chunk of the parallel chunks used " \ 1472145836Smlaier "during card table scanning") \ 1473145836Smlaier \ 1474126258Smlaier product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1475126258Smlaier "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1476126258Smlaier "parallel GC.") \ 1477126258Smlaier \ 1478126258Smlaier product(uintx, OldPLABWeight, 50, \ 1479126258Smlaier "Percentage (0-100) used to weight the current sample when" \ 1480126258Smlaier "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 1481126258Smlaier \ 1482126258Smlaier product(bool, ResizeOldPLAB, true, \ 1483126258Smlaier "Dynamically resize (old gen) promotion labs") \ 1484126258Smlaier \ 1485126258Smlaier product(bool, PrintOldPLAB, false, \ 1486223637Sbz "Print (old gen) promotion labs sizing decisions") \ 1487126261Smlaier \ 1488126258Smlaier product(uintx, CMSOldPLABMin, 16, \ 1489126258Smlaier "Min size of CMS gen promotion lab caches per worker per blksize")\ 1490126258Smlaier \ 1491126258Smlaier product(uintx, CMSOldPLABMax, 1024, \ 1492126258Smlaier "Max size of CMS gen promotion lab caches per worker per blksize")\ 1493126258Smlaier \ 1494126258Smlaier product(uintx, CMSOldPLABNumRefills, 4, \ 1495126258Smlaier "Nominal number of refills of CMS gen promotion lab cache" \ 1496126258Smlaier " per worker per block size") \ 1497126258Smlaier \ 1498126258Smlaier product(bool, CMSOldPLABResizeQuicker, false, \ 1499126258Smlaier "Whether to react on-the-fly during a scavenge to a sudden" \ 1500126258Smlaier " change in block demand rate") \ 1501126258Smlaier \ 1502126258Smlaier product(uintx, CMSOldPLABToleranceFactor, 4, \ 1503223637Sbz "The tolerance of the phase-change detector for on-the-fly" \ 1504145836Smlaier " PLAB resizing during a scavenge") \ 1505126258Smlaier \ 1506223637Sbz product(uintx, CMSOldPLABReactivityFactor, 2, \ 1507223637Sbz "The gain in the feedback loop for on-the-fly PLAB resizing" \ 1508145836Smlaier " during a scavenge") \ 1509145836Smlaier \ 1510126258Smlaier product(bool, AlwaysPreTouch, false, \ 1511126258Smlaier "It forces all freshly committed pages to be pre-touched.") \ 1512126258Smlaier \ 1513126258Smlaier product_pd(intx, CMSYoungGenPerWorker, \ 1514126258Smlaier "The maximum size of young gen chosen by default per GC worker " \ 1515126258Smlaier "thread available") \ 1516126258Smlaier \ 1517126258Smlaier product(bool, CMSIncrementalMode, false, \ 1518126258Smlaier "Whether CMS GC should operate in \"incremental\" mode") \ 1519126258Smlaier \ 1520126258Smlaier product(uintx, CMSIncrementalDutyCycle, 10, \ 1521126258Smlaier "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1522126258Smlaier "CMSIncrementalPacing is enabled, then this is just the initial" \ 1523126258Smlaier "value") \ 1524126258Smlaier \ 1525126258Smlaier product(bool, CMSIncrementalPacing, true, \ 1526126258Smlaier "Whether the CMS incremental mode duty cycle should be " \ 1527223637Sbz "automatically adjusted") \ 1528223637Sbz \ 1529126261Smlaier product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1530126261Smlaier "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1531126258Smlaier "enabled (a percentage, 0-100)") \ 1532126258Smlaier \ 1533126258Smlaier product(uintx, CMSIncrementalSafetyFactor, 10, \ 1534126258Smlaier "Percentage (0-100) used to add conservatism when computing the " \ 1535126258Smlaier "duty cycle") \ 1536126258Smlaier \ 1537126258Smlaier product(uintx, CMSIncrementalOffset, 0, \ 1538126258Smlaier "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1539126258Smlaier " is shifted to the right within the period between young GCs") \ 1540126258Smlaier \ 1541126258Smlaier product(uintx, CMSExpAvgFactor, 50, \ 1542126258Smlaier "Percentage (0-100) used to weight the current sample when" \ 1543126258Smlaier "computing exponential averages for CMS statistics.") \ 1544126258Smlaier \ 1545126258Smlaier product(uintx, CMS_FLSWeight, 75, \ 1546126258Smlaier "Percentage (0-100) used to weight the current sample when" \ 1547126258Smlaier "computing exponentially decating averages for CMS FLS statistics.") \ 1548126258Smlaier \ 1549126258Smlaier product(uintx, CMS_FLSPadding, 1, \ 1550126258Smlaier "The multiple of deviation from mean to use for buffering" \ 1551126258Smlaier "against volatility in free list demand.") \ 1552126258Smlaier \ 1553223637Sbz product(uintx, FLSCoalescePolicy, 2, \ 1554145836Smlaier "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1555126258Smlaier \ 1556223637Sbz product(bool, FLSAlwaysCoalesceLarge, false, \ 1557223637Sbz "CMS: Larger free blocks are always available for coalescing") \ 1558126258Smlaier \ 1559126258Smlaier product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1560223637Sbz "CMS: the smaller the percentage the greater the coalition force")\ 1561126261Smlaier \ 1562130613Smlaier product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1563126258Smlaier "CMS: the factor by which to inflate estimated demand of small" \ 1564126258Smlaier " block sizes to prevent coalescing with an adjoining block") \ 1565126258Smlaier \ 1566126258Smlaier product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1567126258Smlaier "CMS: the factor by which to inflate estimated demand of large" \ 1568126258Smlaier " block sizes to prevent coalescing with an adjoining block") \ 1569126258Smlaier \ 1570126258Smlaier product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1571126258Smlaier "CMS: the factor by which to inflate estimated demand of small" \ 1572126258Smlaier " block sizes to prevent splitting to supply demand for smaller" \ 1573126258Smlaier " blocks") \ 1574126258Smlaier \ 1575126258Smlaier product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1576126258Smlaier "CMS: the factor by which to inflate estimated demand of large" \ 1577126258Smlaier " block sizes to prevent splitting to supply demand for smaller" \ 1578126258Smlaier " blocks") \ 1579126258Smlaier \ 1580126258Smlaier product(bool, CMSExtrapolateSweep, false, \ 1581126258Smlaier "CMS: cushion for block demand during sweep") \ 1582126258Smlaier \ 1583126258Smlaier product(uintx, CMS_SweepWeight, 75, \ 1584126258Smlaier "Percentage (0-100) used to weight the current sample when " \ 1585126258Smlaier "computing exponentially decaying average for inter-sweep " \ 1586126258Smlaier "duration") \ 1587126258Smlaier \ 1588223637Sbz product(uintx, CMS_SweepPadding, 1, \ 1589126258Smlaier "The multiple of deviation from mean to use for buffering " \ 1590223637Sbz "against volatility in inter-sweep duration.") \ 1591126258Smlaier \ 1592126258Smlaier product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1593126258Smlaier "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1594126258Smlaier "duration exceeds this threhold in milliseconds") \ 1595126258Smlaier \ 1596126258Smlaier develop(bool, CMSTraceIncrementalMode, false, \ 1597223637Sbz "Trace CMS incremental mode") \ 1598126261Smlaier \ 1599130613Smlaier develop(bool, CMSTraceIncrementalPacing, false, \ 1600130613Smlaier "Trace CMS incremental mode pacing computation") \ 1601126258Smlaier \ 1602126258Smlaier develop(bool, CMSTraceThreadState, false, \ 1603126258Smlaier "Trace the CMS thread state (enable the trace_state() method)") \ 1604126258Smlaier \ 1605126258Smlaier product(bool, CMSClassUnloadingEnabled, true, \ 1606126258Smlaier "Whether class unloading enabled when using CMS GC") \ 1607126258Smlaier \ 1608126258Smlaier product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1609126258Smlaier "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1610126258Smlaier " for which classes may not be unloaded") \ 1611126258Smlaier \ 1612126258Smlaier product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1613126258Smlaier "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1614126258Smlaier \ 1615126258Smlaier product(bool, UseCMSCompactAtFullCollection, true, \ 1616126258Smlaier "Use mark sweep compact at full collections") \ 1617126258Smlaier \ 1618126258Smlaier product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1619126258Smlaier "Number of CMS full collection done before compaction if > 0") \ 1620126258Smlaier \ 1621126258Smlaier develop(intx, CMSDictionaryChoice, 0, \ 1622126258Smlaier "Use BinaryTreeDictionary as default in the CMS generation") \ 1623126258Smlaier \ 1624126258Smlaier product(uintx, CMSIndexedFreeListReplenish, 4, \ 1625126258Smlaier "Replenish an indexed free list with this number of chunks") \ 1626126258Smlaier \ 1627126258Smlaier product(bool, CMSReplenishIntermediate, true, \ 1628126258Smlaier "Replenish all intermediate free-list caches") \ 1629126258Smlaier \ 1630126258Smlaier product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1631126258Smlaier "When satisfying batched demand, split blocks from the " \ 1632126258Smlaier "IndexedFreeList whose size is a multiple of requested size") \ 1633126258Smlaier \ 1634126258Smlaier product(bool, CMSLoopWarn, false, \ 1635126258Smlaier "Warn in case of excessive CMS looping") \ 1636126258Smlaier \ 1637126258Smlaier develop(bool, CMSOverflowEarlyRestoration, false, \ 1638126258Smlaier "Whether preserved marks should be restored early") \ 1639126258Smlaier \ 1640126258Smlaier product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1641126258Smlaier "Size of marking stack") \ 1642126258Smlaier \ 1643126258Smlaier product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1644223637Sbz "Max size of marking stack") \ 1645145836Smlaier \ 1646126258Smlaier notproduct(bool, CMSMarkStackOverflowALot, false, \ 1647126258Smlaier "Whether we should simulate frequent marking stack / work queue" \ 1648126258Smlaier " overflow") \ 1649126258Smlaier \ 1650126258Smlaier notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1651126258Smlaier "An `interval' counter that determines how frequently" \ 1652126258Smlaier " we simulate overflow; a smaller number increases frequency") \ 1653126258Smlaier \ 1654126258Smlaier product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1655126258Smlaier "(Temporary, subject to experimentation)" \ 1656126258Smlaier "Maximum number of abortable preclean iterations, if > 0") \ 1657126258Smlaier \ 1658126258Smlaier product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1659126258Smlaier "(Temporary, subject to experimentation)" \ 1660126258Smlaier "Maximum time in abortable preclean in ms") \ 1661126258Smlaier \ 1662126258Smlaier product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1663126258Smlaier "(Temporary, subject to experimentation)" \ 1664126258Smlaier "Nominal minimum work per abortable preclean iteration") \ 1665126258Smlaier \ 1666126258Smlaier manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1667126258Smlaier "(Temporary, subject to experimentation)" \ 1668126258Smlaier " Time that we sleep between iterations when not given" \ 1669126258Smlaier " enough work per iteration") \ 1670126258Smlaier \ 1671126258Smlaier product(uintx, CMSRescanMultiple, 32, \ 1672126258Smlaier "Size (in cards) of CMS parallel rescan task") \ 1673126258Smlaier \ 1674126258Smlaier product(uintx, CMSConcMarkMultiple, 32, \ 1675126258Smlaier "Size (in cards) of CMS concurrent MT marking task") \ 1676126258Smlaier \ 1677126258Smlaier product(bool, CMSAbortSemantics, false, \ 1678126258Smlaier "Whether abort-on-overflow semantics is implemented") \ 1679126258Smlaier \ 1680126258Smlaier product(bool, CMSParallelRemarkEnabled, true, \ 1681223637Sbz "Whether parallel remark enabled (only if ParNewGC)") \ 1682126258Smlaier \ 1683126258Smlaier product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1684130613Smlaier "Whether parallel remark of survivor space" \ 1685130613Smlaier " enabled (effective only if CMSParallelRemarkEnabled)") \ 1686126258Smlaier \ 1687145836Smlaier product(bool, CMSPLABRecordAlways, true, \ 1688126258Smlaier "Whether to always record survivor space PLAB bdries" \ 1689126258Smlaier " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1690126258Smlaier \ 1691126258Smlaier product(bool, CMSConcurrentMTEnabled, true, \ 1692126258Smlaier "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1693126258Smlaier \ 1694223637Sbz product(bool, CMSPrecleaningEnabled, true, \ 1695223637Sbz "Whether concurrent precleaning enabled") \ 1696126258Smlaier \ 1697126258Smlaier product(uintx, CMSPrecleanIter, 3, \ 1698126258Smlaier "Maximum number of precleaning iteration passes") \ 1699126258Smlaier \ 1700126258Smlaier product(uintx, CMSPrecleanNumerator, 2, \ 1701126258Smlaier "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1702126258Smlaier " ratio") \ 1703126258Smlaier \ 1704126258Smlaier product(uintx, CMSPrecleanDenominator, 3, \ 1705126258Smlaier "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1706126258Smlaier " ratio") \ 1707126258Smlaier \ 1708126258Smlaier product(bool, CMSPrecleanRefLists1, true, \ 1709126258Smlaier "Preclean ref lists during (initial) preclean phase") \ 1710126258Smlaier \ 1711223637Sbz product(bool, CMSPrecleanRefLists2, false, \ 1712223637Sbz "Preclean ref lists during abortable preclean phase") \ 1713126258Smlaier \ 1714126258Smlaier product(bool, CMSPrecleanSurvivors1, false, \ 1715126258Smlaier "Preclean survivors during (initial) preclean phase") \ 1716126258Smlaier \ 1717126258Smlaier product(bool, CMSPrecleanSurvivors2, true, \ 1718126258Smlaier "Preclean survivors during abortable preclean phase") \ 1719126258Smlaier \ 1720126258Smlaier product(uintx, CMSPrecleanThreshold, 1000, \ 1721126258Smlaier "Don't re-iterate if #dirty cards less than this") \ 1722223637Sbz \ 1723126258Smlaier product(bool, CMSCleanOnEnter, true, \ 1724126258Smlaier "Clean-on-enter optimization for reducing number of dirty cards") \ 1725126258Smlaier \ 1726126258Smlaier product(uintx, CMSRemarkVerifyVariant, 1, \ 1727126258Smlaier "Choose variant (1,2) of verification following remark") \ 1728126258Smlaier \ 1729223637Sbz product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1730126261Smlaier "If Eden used is below this value, don't try to schedule remark") \ 1731126258Smlaier \ 1732126258Smlaier product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1733126258Smlaier "The Eden occupancy % at which to try and schedule remark pause") \ 1734126258Smlaier \ 1735145836Smlaier product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1736126258Smlaier "Start sampling Eden top at least before yg occupancy reaches" \ 1737126258Smlaier " 1/<ratio> of the size at which we plan to schedule remark") \ 1738126258Smlaier \ 1739126258Smlaier product(uintx, CMSSamplingGrain, 16*K, \ 1740126258Smlaier "The minimum distance between eden samples for CMS (see above)") \ 1741126258Smlaier \ 1742126258Smlaier product(bool, CMSScavengeBeforeRemark, false, \ 1743126258Smlaier "Attempt scavenge before the CMS remark step") \ 1744126258Smlaier \ 1745126258Smlaier develop(bool, CMSTraceSweeper, false, \ 1746126258Smlaier "Trace some actions of the CMS sweeper") \ 1747126258Smlaier \ 1748126258Smlaier product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1749126258Smlaier "Don't drain below this size per parallel worker/thief") \ 1750126258Smlaier \ 1751126258Smlaier manageable(intx, CMSWaitDuration, 2000, \ 1752126258Smlaier "Time in milliseconds that CMS thread waits for young GC") \ 1753126258Smlaier \ 1754126258Smlaier product(bool, CMSYield, true, \ 1755126258Smlaier "Yield between steps of concurrent mark & sweep") \ 1756126258Smlaier \ 1757126258Smlaier product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1758126258Smlaier "Bitmap operations should process at most this many bits" \ 1759126258Smlaier "between yields") \ 1760126258Smlaier \ 1761126258Smlaier product(bool, CMSDumpAtPromotionFailure, false, \ 1762126258Smlaier "Dump useful information about the state of the CMS old " \ 1763126258Smlaier " generation upon a promotion failure.") \ 1764126258Smlaier \ 1765126258Smlaier product(bool, CMSPrintChunksInDump, false, \ 1766126258Smlaier "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1767126258Smlaier " more detailed information about the free chunks.") \ 1768126258Smlaier \ 1769126258Smlaier product(bool, CMSPrintObjectsInDump, false, \ 1770126258Smlaier "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1771126258Smlaier " more detailed information about the allocated objects.") \ 1772130613Smlaier \ 1773130613Smlaier diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1774130613Smlaier "Verify that all refs across the FLS boundary " \ 1775130613Smlaier " are to valid objects") \ 1776130613Smlaier \ 1777130613Smlaier diagnostic(bool, FLSVerifyLists, false, \ 1778130613Smlaier "Do lots of (expensive) FreeListSpace verification") \ 1779223637Sbz \ 1780145836Smlaier diagnostic(bool, FLSVerifyIndexTable, false, \ 1781130613Smlaier "Do lots of (expensive) FLS index table verification") \ 1782130613Smlaier \ 1783130613Smlaier develop(bool, FLSVerifyDictionary, false, \ 1784130613Smlaier "Do lots of (expensive) FLS dictionary verification") \ 1785130613Smlaier \ 1786130613Smlaier develop(bool, VerifyBlockOffsetArray, false, \ 1787130613Smlaier "Do (expensive!) block offset array verification") \ 1788130613Smlaier \ 1789130613Smlaier diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1790130613Smlaier "Maintain _unallocated_block in BlockOffsetArray" \ 1791130613Smlaier " (currently applicable only to CMS collector)") \ 1792130613Smlaier \ 1793130613Smlaier develop(bool, TraceCMSState, false, \ 1794130613Smlaier "Trace the state of the CMS collection") \ 1795130613Smlaier \ 1796130613Smlaier product(intx, RefDiscoveryPolicy, 0, \ 1797130613Smlaier "Whether reference-based(0) or referent-based(1)") \ 1798130613Smlaier \ 1799130613Smlaier product(bool, ParallelRefProcEnabled, false, \ 1800130613Smlaier "Enable parallel reference processing whenever possible") \ 1801130613Smlaier \ 1802130613Smlaier product(bool, ParallelRefProcBalancingEnabled, true, \ 1803126258Smlaier "Enable balancing of reference processing queues") \ 1804126258Smlaier \ 1805126258Smlaier product(intx, CMSTriggerRatio, 80, \ 1806145836Smlaier "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1807126258Smlaier "allocated before a CMS collection cycle commences") \ 1808126258Smlaier \ 1809223637Sbz product(uintx, CMSBootstrapOccupancy, 50, \ 1810145836Smlaier "Percentage CMS generation occupancy at which to " \ 1811126258Smlaier "initiate CMS collection for bootstrapping collection stats") \ 1812223637Sbz \ 1813145836Smlaier product(intx, CMSInitiatingOccupancyFraction, -1, \ 1814126258Smlaier "Percentage CMS generation occupancy to start a CMS collection " \ 1815126258Smlaier "cycle. A negative value means that CMSTriggerRatio is used") \ 1816126258Smlaier \ 1817126258Smlaier product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1818126258Smlaier "Percentage of the (entire) heap occupancy to start a " \ 1819126258Smlaier "concurrent GC cycle. It us used by GCs that trigger a " \ 1820126258Smlaier "concurrent GC cycle based on the occupancy of the entire heap, " \ 1821126258Smlaier "not just one of the generations (e.g., G1). A value of 0 " \ 1822126258Smlaier "denotes 'do constant GC cycles'.") \ 1823126258Smlaier \ 1824126258Smlaier product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1825126258Smlaier "Only use occupancy as a crierion for starting a CMS collection") \ 1826126258Smlaier \ 1827126258Smlaier product(intx, CMSIsTooFullPercentage, 98, \ 1828126258Smlaier "An absolute ceiling above which CMS will always consider the " \ 1829126258Smlaier "unloading of classes when class unloading is enabled") \ 1830126258Smlaier \ 1831126258Smlaier develop(bool, CMSTestInFreeList, false, \ 1832145836Smlaier "Check if the coalesced range is already in the " \ 1833145836Smlaier "free lists as claimed") \ 1834126258Smlaier \ 1835145836Smlaier notproduct(bool, CMSVerifyReturnedBytes, false, \ 1836126258Smlaier "Check that all the garbage collected was returned to the " \ 1837126258Smlaier "free lists.") \ 1838126258Smlaier \ 1839126258Smlaier notproduct(bool, ScavengeALot, false, \ 1840126258Smlaier "Force scavenge at every Nth exit from the runtime system " \ 1841126258Smlaier "(N=ScavengeALotInterval)") \ 1842126258Smlaier \ 1843126258Smlaier develop(bool, FullGCALot, false, \ 1844126258Smlaier "Force full gc at every Nth exit from the runtime system " \ 1845126258Smlaier "(N=FullGCALotInterval)") \ 1846126258Smlaier \ 1847126258Smlaier notproduct(bool, GCALotAtAllSafepoints, false, \ 1848126258Smlaier "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1849126258Smlaier \ 1850126258Smlaier product(bool, PrintPromotionFailure, false, \ 1851126258Smlaier "Print additional diagnostic information following " \ 1852126258Smlaier " promotion failure") \ 1853126258Smlaier \ 1854126258Smlaier notproduct(bool, PromotionFailureALot, false, \ 1855126258Smlaier "Use promotion failure handling on every youngest generation " \ 1856126258Smlaier "collection") \ 1857126258Smlaier \ 1858126258Smlaier develop(uintx, PromotionFailureALotCount, 1000, \ 1859126258Smlaier "Number of promotion failures occurring at ParGCAllocBuffer" \ 1860126258Smlaier "refill attempts (ParNew) or promotion attempts " \ 1861126258Smlaier "(other young collectors) ") \ 1862126258Smlaier \ 1863126258Smlaier develop(uintx, PromotionFailureALotInterval, 5, \ 1864126258Smlaier "Total collections between promotion failures alot") \ 1865126258Smlaier \ 1866126258Smlaier experimental(intx, WorkStealingSleepMillis, 1, \ 1867126258Smlaier "Sleep time when sleep is used for yields") \ 1868126258Smlaier \ 1869126258Smlaier experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 1870126258Smlaier "Number of yields before a sleep is done during workstealing") \ 1871126258Smlaier \ 1872126258Smlaier experimental(uintx, WorkStealingHardSpins, 4096, \ 1873126258Smlaier "Number of iterations in a spin loop between checks on " \ 1874126258Smlaier "time out of hard spin") \ 1875126258Smlaier \ 1876126258Smlaier experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1877126258Smlaier "Ratio of hard spins to calls to yield") \ 1878126258Smlaier \ 1879126258Smlaier develop(uintx, ObjArrayMarkingStride, 512, \ 1880126258Smlaier "Number of ObjArray elements to push onto the marking stack" \ 1881126258Smlaier "before pushing a continuation entry") \ 1882126258Smlaier \ 1883126258Smlaier develop(bool, MetadataAllocationFailALot, false, \ 1884126258Smlaier "Fail metadata allocations at intervals controlled by " \ 1885126258Smlaier "MetadataAllocationFailALotInterval") \ 1886126258Smlaier \ 1887126258Smlaier develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1888126258Smlaier "metadata allocation failure alot interval") \ 1889126258Smlaier \ 1890126258Smlaier develop(bool, MetaDataDeallocateALot, false, \ 1891126258Smlaier "Deallocation bunches of metadata at intervals controlled by " \ 1892126258Smlaier "MetaDataAllocateALotInterval") \ 1893126258Smlaier \ 1894126258Smlaier develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1895126258Smlaier "Metadata deallocation alot interval") \ 1896126258Smlaier \ 1897126258Smlaier develop(bool, TraceMetadataChunkAllocation, false, \ 1898126258Smlaier "Trace chunk metadata allocations") \ 1899126258Smlaier \ 1900126258Smlaier product(bool, TraceMetadataHumongousAllocation, false, \ 1901126258Smlaier "Trace humongous metadata allocations") \ 1902126258Smlaier \ 1903126258Smlaier develop(bool, TraceMetavirtualspaceAllocation, false, \ 1904126258Smlaier "Trace virtual space metadata allocations") \ 1905126258Smlaier \ 1906126258Smlaier notproduct(bool, ExecuteInternalVMTests, false, \ 1907126258Smlaier "Enable execution of internal VM tests.") \ 1908126258Smlaier \ 1909130613Smlaier product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1910126258Smlaier \ 1911126258Smlaier product_pd(bool, ResizeTLAB, \ 1912126258Smlaier "Dynamically resize tlab size for threads") \ 1913126258Smlaier \ 1914126258Smlaier product(bool, ZeroTLAB, false, \ 1915130613Smlaier "Zero out the newly created TLAB") \ 1916130613Smlaier \ 1917126258Smlaier product(bool, FastTLABRefill, true, \ 1918126258Smlaier "Use fast TLAB refill code") \ 1919126258Smlaier \ 1920126258Smlaier product(bool, PrintTLAB, false, \ 1921126258Smlaier "Print various TLAB related information") \ 1922145836Smlaier \ 1923145836Smlaier product(bool, TLABStats, true, \ 1924126258Smlaier "Print various TLAB related information") \ 1925126258Smlaier \ 1926126258Smlaier EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1927126258Smlaier "Enable LowMemoryProtection")) \ 1928126258Smlaier \ 1929145836Smlaier product_pd(bool, NeverActAsServerClassMachine, \ 1930145836Smlaier "Never act like a server-class machine") \ 1931145836Smlaier \ 1932145836Smlaier product(bool, AlwaysActAsServerClassMachine, false, \ 1933126258Smlaier "Always act like a server-class machine") \ 1934145836Smlaier \ 1935145836Smlaier product_pd(uint64_t, MaxRAM, \ 1936145836Smlaier "Real memory size (in bytes) used to set maximum heap size") \ 1937145836Smlaier \ 1938145836Smlaier product(uintx, ErgoHeapSizeLimit, 0, \ 1939145836Smlaier "Maximum ergonomically set heap size (in bytes); zero means use " \ 1940145836Smlaier "MaxRAM / MaxRAMFraction") \ 1941145836Smlaier \ 1942145836Smlaier product(uintx, MaxRAMFraction, 4, \ 1943145836Smlaier "Maximum fraction (1/n) of real memory used for maximum heap " \ 1944145836Smlaier "size") \ 1945145836Smlaier \ 1946145836Smlaier product(uintx, DefaultMaxRAMFraction, 4, \ 1947145836Smlaier "Maximum fraction (1/n) of real memory used for maximum heap " \ 1948145836Smlaier "size; deprecated: to be renamed to MaxRAMFraction") \ 1949145836Smlaier \ 1950145836Smlaier product(uintx, MinRAMFraction, 2, \ 1951145836Smlaier "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 1952145836Smlaier "size on systems with small physical memory size") \ 1953145836Smlaier \ 1954145836Smlaier product(uintx, InitialRAMFraction, 64, \ 1955145836Smlaier "Fraction (1/n) of real memory used for initial heap size") \ 1956145836Smlaier \ 1957145836Smlaier product(bool, UseAutoGCSelectPolicy, false, \ 1958145836Smlaier "Use automatic collection selection policy") \ 1959126258Smlaier \ 1960126258Smlaier product(uintx, AutoGCSelectPauseMillis, 5000, \ 1961126258Smlaier "Automatic GC selection pause threshhold in ms") \ 1962126258Smlaier \ 1963126258Smlaier product(bool, UseAdaptiveSizePolicy, true, \ 1964126258Smlaier "Use adaptive generation sizing policies") \ 1965145836Smlaier \ 1966145836Smlaier product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1967126258Smlaier "Use adaptive survivor sizing policies") \ 1968126258Smlaier \ 1969126258Smlaier product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1970126258Smlaier "Use adaptive young-old sizing policies at minor collections") \ 1971126258Smlaier \ 1972126258Smlaier product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1973126258Smlaier "Use adaptive young-old sizing policies at major collections") \ 1974126258Smlaier \ 1975126258Smlaier product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1976126258Smlaier "Use statistics from System.GC for adaptive size policy") \ 1977145836Smlaier \ 1978126258Smlaier product(bool, UseAdaptiveGCBoundary, false, \ 1979126258Smlaier "Allow young-old boundary to move") \ 1980126258Smlaier \ 1981126258Smlaier develop(bool, TraceAdaptiveGCBoundary, false, \ 1982126258Smlaier "Trace young-old boundary moves") \ 1983126258Smlaier \ 1984126258Smlaier develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1985126258Smlaier "Resize the virtual spaces of the young or old generations") \ 1986126258Smlaier \ 1987126258Smlaier product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1988126258Smlaier "Policy for changeing generation size for throughput goals") \ 1989126258Smlaier \ 1990126258Smlaier product(uintx, AdaptiveSizePausePolicy, 0, \ 1991126258Smlaier "Policy for changing generation size for pause goals") \ 1992126258Smlaier \ 1993126258Smlaier develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1994126258Smlaier "Adjust tenured generation to achive a minor pause goal") \ 1995126258Smlaier \ 1996126258Smlaier develop(bool, PSAdjustYoungGenForMajorPause, false, \ 1997126258Smlaier "Adjust young generation to achive a major pause goal") \ 1998126258Smlaier \ 1999126258Smlaier product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2000126258Smlaier "Number of steps where heuristics is used before data is used") \ 2001126258Smlaier \ 2002126258Smlaier develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2003126258Smlaier "Number of collections before the adaptive sizing is started") \ 2004126258Smlaier \ 2005145836Smlaier product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2006126258Smlaier "Collecton interval for printing information; zero => never") \ 2007145836Smlaier \ 2008145836Smlaier product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2009126258Smlaier "Use adaptive minimum footprint as a goal") \ 2010145836Smlaier \ 2011126258Smlaier product(uintx, AdaptiveSizePolicyWeight, 10, \ 2012126258Smlaier "Weight given to exponential resizing, between 0 and 100") \ 2013126258Smlaier \ 2014126258Smlaier product(uintx, AdaptiveTimeWeight, 25, \ 2015126258Smlaier "Weight given to time in adaptive policy, between 0 and 100") \ 2016126258Smlaier \ 2017126258Smlaier product(uintx, PausePadding, 1, \ 2018126258Smlaier "How much buffer to keep for pause time") \ 2019126258Smlaier \ 2020126258Smlaier product(uintx, PromotedPadding, 3, \ 2021126258Smlaier "How much buffer to keep for promotion failure") \ 2022126258Smlaier \ 2023126258Smlaier product(uintx, SurvivorPadding, 3, \ 2024126258Smlaier "How much buffer to keep for survivor overflow") \ 2025126258Smlaier \ 2026126258Smlaier product(uintx, ThresholdTolerance, 10, \ 2027126258Smlaier "Allowed collection cost difference between generations") \ 2028126258Smlaier \ 2029126258Smlaier product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2030126258Smlaier "If collection costs are within margin, reduce both by full " \ 2031126258Smlaier "delta") \ 2032126258Smlaier \ 2033126258Smlaier product(uintx, YoungGenerationSizeIncrement, 20, \ 2034126258Smlaier "Adaptive size percentage change in young generation") \ 2035126258Smlaier \ 2036126258Smlaier product(uintx, YoungGenerationSizeSupplement, 80, \ 2037126258Smlaier "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2038126258Smlaier \ 2039126258Smlaier product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2040126258Smlaier "Decay factor to YoungedGenerationSizeSupplement") \ 2041126258Smlaier \ 2042126258Smlaier product(uintx, TenuredGenerationSizeIncrement, 20, \ 2043126258Smlaier "Adaptive size percentage change in tenured generation") \ 2044126258Smlaier \ 2045126258Smlaier product(uintx, TenuredGenerationSizeSupplement, 80, \ 2046126258Smlaier "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2047126258Smlaier \ 2048126258Smlaier product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2049126258Smlaier "Decay factor to TenuredGenerationSizeIncrement") \ 2050126258Smlaier \ 2051126258Smlaier product(uintx, MaxGCPauseMillis, max_uintx, \ 2052126258Smlaier "Adaptive size policy maximum GC pause time goal in msec, " \ 2053126258Smlaier "or (G1 Only) the max. GC time per MMU time slice") \ 2054126258Smlaier \ 2055126258Smlaier product(uintx, GCPauseIntervalMillis, 0, \ 2056126258Smlaier "Time slice for MMU specification") \ 2057126258Smlaier \ 2058126258Smlaier product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2059126258Smlaier "Adaptive size policy maximum GC minor pause time goal in msec") \ 2060126258Smlaier \ 2061126258Smlaier product(uintx, GCTimeRatio, 99, \ 2062126258Smlaier "Adaptive size policy application time to GC time ratio") \ 2063126258Smlaier \ 2064126258Smlaier product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2065126258Smlaier "Adaptive size scale down factor for shrinking") \ 2066126258Smlaier \ 2067126258Smlaier product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2068126258Smlaier "Adaptive size decays the major cost for long major intervals") \ 2069126258Smlaier \ 2070126258Smlaier product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2071126258Smlaier "Time scale over which major costs decay") \ 2072126258Smlaier \ 2073223637Sbz product(uintx, MinSurvivorRatio, 3, \ 2074223637Sbz "Minimum ratio of young generation/survivor space size") \ 2075126258Smlaier \ 2076126258Smlaier product(uintx, InitialSurvivorRatio, 8, \ 2077126258Smlaier "Initial ratio of eden/survivor space size") \ 2078126258Smlaier \ 2079223637Sbz product(uintx, BaseFootPrintEstimate, 256*M, \ 2080238600Sglebius "Estimate of footprint other than Java Heap") \ 2081223637Sbz \ 2082238600Sglebius product(bool, UseGCOverheadLimit, true, \ 2083223637Sbz "Use policy to limit of proportion of time spent in GC " \ 2084223637Sbz "before an OutOfMemory error is thrown") \ 2085223637Sbz \ 2086223637Sbz product(uintx, GCTimeLimit, 98, \ 2087126258Smlaier "Limit of proportion of time spent in GC before an OutOfMemory" \ 2088126258Smlaier "error is thrown (used with GCHeapFreeLimit)") \ 2089126258Smlaier \ 2090126258Smlaier product(uintx, GCHeapFreeLimit, 2, \ 2091126258Smlaier "Minimum percentage of free space after a full GC before an " \ 2092145836Smlaier "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2093126258Smlaier \ 2094126258Smlaier develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2095126258Smlaier "Number of consecutive collections before gc time limit fires") \ 2096126258Smlaier \ 2097126258Smlaier product(bool, PrintAdaptiveSizePolicy, false, \ 2098126258Smlaier "Print information about AdaptiveSizePolicy") \ 2099126258Smlaier \ 2100126258Smlaier product(intx, PrefetchCopyIntervalInBytes, -1, \ 2101126258Smlaier "How far ahead to prefetch destination area (<= 0 means off)") \ 2102126258Smlaier \ 2103126258Smlaier product(intx, PrefetchScanIntervalInBytes, -1, \ 2104126258Smlaier "How far ahead to prefetch scan area (<= 0 means off)") \ 2105126258Smlaier \ 2106126258Smlaier product(intx, PrefetchFieldsAhead, -1, \ 2107126258Smlaier "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2108126258Smlaier \ 2109126258Smlaier diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2110126258Smlaier "Verify system before exiting") \ 2111126258Smlaier \ 2112126258Smlaier diagnostic(bool, VerifyBeforeGC, false, \ 2113126258Smlaier "Verify memory system before GC") \ 2114126258Smlaier \ 2115126258Smlaier diagnostic(bool, VerifyAfterGC, false, \ 2116126258Smlaier "Verify memory system after GC") \ 2117126258Smlaier \ 2118126258Smlaier diagnostic(bool, VerifyDuringGC, false, \ 2119126258Smlaier "Verify memory system during GC (between phases)") \ 2120126258Smlaier \ 2121126258Smlaier diagnostic(bool, GCParallelVerificationEnabled, true, \ 2122126258Smlaier "Enable parallel memory system verification") \ 2123126258Smlaier \ 2124126258Smlaier diagnostic(bool, DeferInitialCardMark, false, \ 2125126258Smlaier "When +ReduceInitialCardMarks, explicitly defer any that " \ 2126126258Smlaier "may arise from new_pre_store_barrier") \ 2127126258Smlaier \ 2128126258Smlaier diagnostic(bool, VerifyRememberedSets, false, \ 2129126258Smlaier "Verify GC remembered sets") \ 2130126258Smlaier \ 2131126258Smlaier diagnostic(bool, VerifyObjectStartArray, true, \ 2132126258Smlaier "Verify GC object start array if verify before/after") \ 2133126258Smlaier \ 2134126261Smlaier product(bool, DisableExplicitGC, false, \ 2135126261Smlaier "Tells whether calling System.gc() does a full GC") \ 2136126261Smlaier \ 2137126261Smlaier notproduct(bool, CheckMemoryInitialization, false, \ 2138126261Smlaier "Checks memory initialization") \ 2139126261Smlaier \ 2140126261Smlaier product(bool, CollectGen0First, false, \ 2141126261Smlaier "Collect youngest generation before each full GC") \ 2142126261Smlaier \ 2143126261Smlaier diagnostic(bool, BindCMSThreadToCPU, false, \ 2144126258Smlaier "Bind CMS Thread to CPU if possible") \ 2145126258Smlaier \ 2146126258Smlaier diagnostic(uintx, CPUForCMSThread, 0, \ 2147126258Smlaier "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2148126261Smlaier \ 2149126258Smlaier product(bool, BindGCTaskThreadsToCPUs, false, \ 2150126258Smlaier "Bind GCTaskThreads to CPUs if possible") \ 2151126258Smlaier \ 2152126258Smlaier product(bool, UseGCTaskAffinity, false, \ 2153126258Smlaier "Use worker affinity when asking for GCTasks") \ 2154126258Smlaier \ 2155223637Sbz product(uintx, ProcessDistributionStride, 4, \ 2156223637Sbz "Stride through processors when distributing processes") \ 2157223637Sbz \ 2158126258Smlaier product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2159223637Sbz "number of times the coordinator GC thread will sleep while " \ 2160126258Smlaier "yielding before giving up and resuming GC") \ 2161126258Smlaier \ 2162126258Smlaier product(uintx, CMSYieldSleepCount, 0, \ 2163126258Smlaier "number of times a GC thread (minus the coordinator) " \ 2164126258Smlaier "will sleep while yielding before giving up and resuming GC") \ 2165126258Smlaier \ 2166126258Smlaier /* gc tracing */ \ 2167126258Smlaier manageable(bool, PrintGC, false, \ 2168126258Smlaier "Print message at garbage collect") \ 2169145836Smlaier \ 2170126258Smlaier manageable(bool, PrintGCDetails, false, \ 2171126258Smlaier "Print more details at garbage collect") \ 2172126258Smlaier \ 2173126258Smlaier manageable(bool, PrintGCDateStamps, false, \ 2174126258Smlaier "Print date stamps at garbage collect") \ 2175126258Smlaier \ 2176130613Smlaier manageable(bool, PrintGCTimeStamps, false, \ 2177130613Smlaier "Print timestamps at garbage collect") \ 2178126258Smlaier \ 2179126258Smlaier product(bool, PrintGCTaskTimeStamps, false, \ 2180126258Smlaier "Print timestamps for individual gc worker thread tasks") \ 2181126258Smlaier \ 2182126258Smlaier develop(intx, ConcGCYieldTimeout, 0, \ 2183126258Smlaier "If non-zero, assert that GC threads yield within this # of ms.") \ 2184126258Smlaier \ 2185126258Smlaier notproduct(bool, TraceMarkSweep, false, \ 2186126258Smlaier "Trace mark sweep") \ 2187126258Smlaier \ 2188126258Smlaier product(bool, PrintReferenceGC, false, \ 2189130613Smlaier "Print times spent handling reference objects during GC " \ 2190126258Smlaier " (enabled only when PrintGCDetails)") \ 2191126258Smlaier \ 2192145836Smlaier develop(bool, TraceReferenceGC, false, \ 2193126258Smlaier "Trace handling of soft/weak/final/phantom references") \ 2194223637Sbz \ 2195223637Sbz develop(bool, TraceFinalizerRegistration, false, \ 2196223637Sbz "Trace registration of final references") \ 2197223637Sbz \ 2198126258Smlaier notproduct(bool, TraceScavenge, false, \ 2199126258Smlaier "Trace scavenge") \ 2200223637Sbz \ 2201126258Smlaier product_rw(bool, TraceClassLoading, false, \ 2202126258Smlaier "Trace all classes loaded") \ 2203126258Smlaier \ 2204145836Smlaier product(bool, TraceClassLoadingPreorder, false, \ 2205145836Smlaier "Trace all classes loaded in order referenced (not loaded)") \ 2206126258Smlaier \ 2207223637Sbz product_rw(bool, TraceClassUnloading, false, \ 2208223637Sbz "Trace unloading of classes") \ 2209223637Sbz \ 2210223637Sbz product_rw(bool, TraceLoaderConstraints, false, \ 2211126258Smlaier "Trace loader constraints") \ 2212126258Smlaier \ 2213223637Sbz develop(bool, TraceClassLoaderData, false, \ 2214126258Smlaier "Trace class loader loader_data lifetime") \ 2215126258Smlaier \ 2216126258Smlaier product(uintx, InitialBootClassLoaderMetaspaceSize, \ 2217145836Smlaier NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2218126258Smlaier "Initial size of the boot class loader data metaspace") \ 2219126258Smlaier \ 2220126258Smlaier product(bool, TraceGen0Time, false, \ 2221126258Smlaier "Trace accumulated time for Gen 0 collection") \ 2222126258Smlaier \ 2223126258Smlaier product(bool, TraceGen1Time, false, \ 2224126258Smlaier "Trace accumulated time for Gen 1 collection") \ 2225126258Smlaier \ 2226126258Smlaier product(bool, PrintTenuringDistribution, false, \ 2227126258Smlaier "Print tenuring age information") \ 2228126258Smlaier \ 2229126258Smlaier product_rw(bool, PrintHeapAtGC, false, \ 2230126258Smlaier "Print heap layout before and after each GC") \ 2231126258Smlaier \ 2232126258Smlaier product_rw(bool, PrintHeapAtGCExtended, false, \ 2233126258Smlaier "Prints extended information about the layout of the heap " \ 2234126258Smlaier "when -XX:+PrintHeapAtGC is set") \ 2235126258Smlaier \ 2236126258Smlaier product(bool, PrintHeapAtSIGBREAK, true, \ 2237126258Smlaier "Print heap layout in response to SIGBREAK") \ 2238126258Smlaier \ 2239145836Smlaier manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2240126258Smlaier "Print a class histogram before any major stop-world GC") \ 2241223637Sbz \ 2242223637Sbz manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2243223637Sbz "Print a class histogram after any major stop-world GC") \ 2244223637Sbz \ 2245126258Smlaier manageable(bool, PrintClassHistogram, false, \ 2246126258Smlaier "Print a histogram of class instances") \ 2247223637Sbz \ 2248126258Smlaier develop(bool, TraceWorkGang, false, \ 2249126258Smlaier "Trace activities of work gangs") \ 2250126258Smlaier \ 2251145836Smlaier product(bool, TraceParallelOldGCTasks, false, \ 2252145836Smlaier "Trace multithreaded GC activity") \ 2253126258Smlaier \ 2254223637Sbz develop(bool, TraceBlockOffsetTable, false, \ 2255223637Sbz "Print BlockOffsetTable maps") \ 2256223637Sbz \ 2257223637Sbz develop(bool, TraceCardTableModRefBS, false, \ 2258126258Smlaier "Print CardTableModRefBS maps") \ 2259126258Smlaier \ 2260223637Sbz develop(bool, TraceGCTaskManager, false, \ 2261126258Smlaier "Trace actions of the GC task manager") \ 2262126258Smlaier \ 2263126258Smlaier develop(bool, TraceGCTaskQueue, false, \ 2264145836Smlaier "Trace actions of the GC task queues") \ 2265145836Smlaier \ 2266145836Smlaier diagnostic(bool, TraceGCTaskThread, false, \ 2267126258Smlaier "Trace actions of the GC task threads") \ 2268126258Smlaier \ 2269126258Smlaier product(bool, PrintParallelOldGCPhaseTimes, false, \ 2270126258Smlaier "Print the time taken by each parallel old gc phase." \ 2271126258Smlaier "PrintGCDetails must also be enabled.") \ 2272126258Smlaier \ 2273126258Smlaier develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2274126258Smlaier "Trace parallel old gc marking phase") \ 2275223637Sbz \ 2276223637Sbz develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2277223637Sbz "Trace parallel old gc summary phase") \ 2278223637Sbz \ 2279223637Sbz develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2280223637Sbz "Trace parallel old gc compaction phase") \ 2281223637Sbz \ 2282223637Sbz develop(bool, TraceParallelOldGCDensePrefix, false, \ 2283223637Sbz "Trace parallel old gc dense prefix computation") \ 2284223637Sbz \ 2285223637Sbz develop(bool, IgnoreLibthreadGPFault, false, \ 2286223637Sbz "Suppress workaround for libthread GP fault") \ 2287223637Sbz \ 2288126258Smlaier product(bool, PrintJNIGCStalls, false, \ 2289126258Smlaier "Print diagnostic message when GC is stalled" \ 2290126258Smlaier "by JNI critical section") \ 2291126258Smlaier \ 2292223637Sbz /* GC log rotation setting */ \ 2293126258Smlaier \ 2294126258Smlaier product(bool, UseGCLogFileRotation, false, \ 2295126258Smlaier "Prevent large gclog file for long running app. " \ 2296126258Smlaier "Requires -Xloggc:<filename>") \ 2297126258Smlaier \ 2298126258Smlaier product(uintx, NumberOfGCLogFiles, 0, \ 2299126258Smlaier "Number of gclog files in rotation, " \ 2300145836Smlaier "Default: 0, no rotation") \ 2301171168Smlaier \ 2302126258Smlaier product(uintx, GCLogFileSize, 0, \ 2303126258Smlaier "GC log file size, Default: 0 bytes, no rotation " \ 2304223637Sbz "Only valid with UseGCLogFileRotation") \ 2305126258Smlaier \ 2306126258Smlaier /* JVMTI heap profiling */ \ 2307126258Smlaier \ 2308126258Smlaier diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2309126258Smlaier "Trace JVMTI object tagging calls") \ 2310126258Smlaier \ 2311223637Sbz diagnostic(bool, VerifyBeforeIteration, false, \ 2312126258Smlaier "Verify memory system before JVMTI iteration") \ 2313126258Smlaier \ 2314126258Smlaier /* compiler interface */ \ 2315126258Smlaier \ 2316126258Smlaier develop(bool, CIPrintCompilerName, false, \ 2317126258Smlaier "when CIPrint is active, print the name of the active compiler") \ 2318126258Smlaier \ 2319126258Smlaier develop(bool, CIPrintCompileQueue, false, \ 2320126258Smlaier "display the contents of the compile queue whenever a " \ 2321126258Smlaier "compilation is enqueued") \ 2322126258Smlaier \ 2323126258Smlaier develop(bool, CIPrintRequests, false, \ 2324130613Smlaier "display every request for compilation") \ 2325126258Smlaier \ 2326126258Smlaier product(bool, CITime, false, \ 2327126258Smlaier "collect timing information for compilation") \ 2328126258Smlaier \ 2329126258Smlaier develop(bool, CITimeEach, false, \ 2330126258Smlaier "display timing information after each successful compilation") \ 2331126258Smlaier \ 2332126258Smlaier develop(bool, CICountOSR, false, \ 2333126258Smlaier "use a separate counter when assigning ids to osr compilations") \ 2334126258Smlaier \ 2335126258Smlaier develop(bool, CICompileNatives, true, \ 2336126258Smlaier "compile native methods if supported by the compiler") \ 2337126258Smlaier \ 2338126258Smlaier develop_pd(bool, CICompileOSR, \ 2339126258Smlaier "compile on stack replacement methods if supported by the " \ 2340126258Smlaier "compiler") \ 2341223637Sbz \ 2342145836Smlaier develop(bool, CIPrintMethodCodes, false, \ 2343145836Smlaier "print method bytecodes of the compiled code") \ 2344223637Sbz \ 2345223637Sbz develop(bool, CIPrintTypeFlow, false, \ 2346223637Sbz "print the results of ciTypeFlow analysis") \ 2347223637Sbz \ 2348126258Smlaier develop(bool, CITraceTypeFlow, false, \ 2349126258Smlaier "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2350126258Smlaier \ 2351223637Sbz develop(intx, OSROnlyBCI, -1, \ 2352145836Smlaier "OSR only at this bci. Negative values mean exclude that bci") \ 2353223637Sbz \ 2354223637Sbz /* compiler */ \ 2355223637Sbz \ 2356223637Sbz product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2357223637Sbz "Number of compiler threads to run") \ 2358145836Smlaier \ 2359145836Smlaier product(intx, CompilationPolicyChoice, 0, \ 2360145836Smlaier "which compilation policy (0/1)") \ 2361223637Sbz \ 2362126258Smlaier develop(bool, UseStackBanging, true, \ 2363126258Smlaier "use stack banging for stack overflow checks (required for " \ 2364126258Smlaier "proper StackOverflow handling; disable only to measure cost " \ 2365126258Smlaier "of stackbanging)") \ 2366126258Smlaier \ 2367126258Smlaier develop(bool, UseStrictFP, true, \ 2368126258Smlaier "use strict fp if modifier strictfp is set") \ 2369126258Smlaier \ 2370126258Smlaier develop(bool, GenerateSynchronizationCode, true, \ 2371126258Smlaier "generate locking/unlocking code for synchronized methods and " \ 2372126258Smlaier "monitors") \ 2373126258Smlaier \ 2374126258Smlaier develop(bool, GenerateCompilerNullChecks, true, \ 2375126258Smlaier "Generate explicit null checks for loads/stores/calls") \ 2376223637Sbz \ 2377223637Sbz develop(bool, GenerateRangeChecks, true, \ 2378126258Smlaier "Generate range checks for array accesses") \ 2379223637Sbz \ 2380223637Sbz develop_pd(bool, ImplicitNullChecks, \ 2381223637Sbz "generate code for implicit null checks") \ 2382223637Sbz \ 2383126258Smlaier product(bool, PrintSafepointStatistics, false, \ 2384223637Sbz "print statistics about safepoint synchronization") \ 2385126258Smlaier \ 2386223637Sbz product(intx, PrintSafepointStatisticsCount, 300, \ 2387223637Sbz "total number of safepoint statistics collected " \ 2388223637Sbz "before printing them out") \ 2389126258Smlaier \ 2390223637Sbz product(intx, PrintSafepointStatisticsTimeout, -1, \ 2391126258Smlaier "print safepoint statistics only when safepoint takes" \ 2392126258Smlaier " more than PrintSafepointSatisticsTimeout in millis") \ 2393126258Smlaier \ 2394126258Smlaier product(bool, TraceSafepointCleanupTime, false, \ 2395126258Smlaier "print the break down of clean up tasks performed during" \ 2396126258Smlaier " safepoint") \ 2397126258Smlaier \ 2398126258Smlaier product(bool, Inline, true, \ 2399126258Smlaier "enable inlining") \ 2400126258Smlaier \ 2401126258Smlaier product(bool, ClipInlining, true, \ 2402126258Smlaier "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2403126258Smlaier \ 2404126258Smlaier develop(bool, UseCHA, true, \ 2405126258Smlaier "enable CHA") \ 2406126258Smlaier \ 2407126258Smlaier product(bool, UseTypeProfile, true, \ 2408126258Smlaier "Check interpreter profile for historically monomorphic calls") \ 2409126258Smlaier \ 2410223637Sbz notproduct(bool, TimeCompiler, false, \ 2411126258Smlaier "time the compiler") \ 2412126258Smlaier \ 2413126258Smlaier diagnostic(bool, PrintInlining, false, \ 2414126258Smlaier "prints inlining optimizations") \ 2415223637Sbz \ 2416145836Smlaier product(bool, UsePopCountInstruction, false, \ 2417223637Sbz "Use population count instruction") \ 2418223637Sbz \ 2419223637Sbz develop(bool, EagerInitialization, false, \ 2420223637Sbz "Eagerly initialize classes if possible") \ 2421223637Sbz \ 2422223637Sbz develop(bool, TraceMethodReplacement, false, \ 2423223637Sbz "Print when methods are replaced do to recompilation") \ 2424145836Smlaier \ 2425145836Smlaier develop(bool, PrintMethodFlushing, false, \ 2426145836Smlaier "print the nmethods being flushed") \ 2427145836Smlaier \ 2428145836Smlaier develop(bool, UseRelocIndex, false, \ 2429223637Sbz "use an index to speed random access to relocations") \ 2430126258Smlaier \ 2431126258Smlaier develop(bool, StressCodeBuffers, false, \ 2432126258Smlaier "Exercise code buffer expansion and other rare state changes") \ 2433126258Smlaier \ 2434126258Smlaier diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2435223637Sbz "Generate extra debugging info for non-safepoints in nmethods") \ 2436126258Smlaier \ 2437126258Smlaier product(bool, PrintVMOptions, false, \ 2438126258Smlaier "Print flags that appeared on the command line") \ 2439126258Smlaier \ 2440126258Smlaier product(bool, IgnoreUnrecognizedVMOptions, false, \ 2441223637Sbz "Ignore unrecognized VM options") \ 2442223637Sbz \ 2443223637Sbz product(bool, PrintCommandLineFlags, false, \ 2444126258Smlaier "Print flags specified on command line or set by ergonomics") \ 2445223637Sbz \ 2446126258Smlaier product(bool, PrintFlagsInitial, false, \ 2447126258Smlaier "Print all VM flags before argument processing and exit VM") \ 2448126258Smlaier \ 2449126258Smlaier product(bool, PrintFlagsFinal, false, \ 2450126258Smlaier "Print all VM flags after argument and ergonomic processing") \ 2451126258Smlaier \ 2452126258Smlaier notproduct(bool, PrintFlagsWithComments, false, \ 2453126258Smlaier "Print all VM flags with default values and descriptions and exit")\ 2454126258Smlaier \ 2455126258Smlaier diagnostic(bool, SerializeVMOutput, true, \ 2456126258Smlaier "Use a mutex to serialize output to tty and hotspot.log") \ 2457126258Smlaier \ 2458126258Smlaier diagnostic(bool, DisplayVMOutput, true, \ 2459126258Smlaier "Display all VM output on the tty, independently of LogVMOutput") \ 2460126258Smlaier \ 2461126258Smlaier diagnostic(bool, LogVMOutput, trueInDebug, \ 2462130613Smlaier "Save VM output to hotspot.log, or to LogFile") \ 2463130613Smlaier \ 2464130613Smlaier diagnostic(ccstr, LogFile, NULL, \ 2465126258Smlaier "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2466130613Smlaier \ 2467145836Smlaier product(ccstr, ErrorFile, NULL, \ 2468126258Smlaier "If an error occurs, save the error data to this file " \ 2469127145Smlaier "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2470126261Smlaier \ 2471126261Smlaier product(bool, DisplayVMOutputToStderr, false, \ 2472126258Smlaier "If DisplayVMOutput is true, display all VM output to stderr") \ 2473126261Smlaier \ 2474130613Smlaier product(bool, DisplayVMOutputToStdout, false, \ 2475145836Smlaier "If DisplayVMOutput is true, display all VM output to stdout") \ 2476145836Smlaier \ 2477126258Smlaier product(bool, UseHeavyMonitors, false, \ 2478127145Smlaier "use heavyweight instead of lightweight Java monitors") \ 2479126261Smlaier \ 2480126261Smlaier product(bool, PrintStringTableStatistics, false, \ 2481126258Smlaier "print statistics about the StringTable and SymbolTable") \ 2482126261Smlaier \ 2483130613Smlaier notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2484145836Smlaier "print histogram of the symbol table") \ 2485126258Smlaier \ 2486130613Smlaier notproduct(bool, ExitVMOnVerifyError, false, \ 2487126258Smlaier "standard exit from VM if bytecode verify error " \ 2488126258Smlaier "(only in debug mode)") \ 2489130613Smlaier \ 2490130613Smlaier notproduct(ccstr, AbortVMOnException, NULL, \ 2491130613Smlaier "Call fatal if this exception is thrown. Example: " \ 2492130613Smlaier "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2493130613Smlaier \ 2494130613Smlaier notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2495130613Smlaier "Call fatal if the exception pointed by AbortVMOnException " \ 2496130613Smlaier "has this message.") \ 2497130613Smlaier \ 2498130613Smlaier develop(bool, DebugVtables, false, \ 2499130613Smlaier "add debugging code to vtable dispatch") \ 2500130613Smlaier \ 2501130613Smlaier develop(bool, PrintVtables, false, \ 2502130613Smlaier "print vtables when printing klass") \ 2503130613Smlaier \ 2504130613Smlaier notproduct(bool, PrintVtableStats, false, \ 2505130613Smlaier "print vtables stats at end of run") \ 2506130613Smlaier \ 2507130613Smlaier develop(bool, TraceCreateZombies, false, \ 2508130613Smlaier "trace creation of zombie nmethods") \ 2509130613Smlaier \ 2510130613Smlaier notproduct(bool, IgnoreLockingAssertions, false, \ 2511130613Smlaier "disable locking assertions (for speed)") \ 2512130613Smlaier \ 2513130613Smlaier product(bool, RangeCheckElimination, true, \ 2514130613Smlaier "Split loop iterations to eliminate range checks") \ 2515130613Smlaier \ 2516130613Smlaier develop_pd(bool, UncommonNullCast, \ 2517 "track occurrences of null in casts; adjust compiler tactics") \ 2518 \ 2519 develop(bool, TypeProfileCasts, true, \ 2520 "treat casts like calls for purposes of type profiling") \ 2521 \ 2522 develop(bool, DelayCompilationDuringStartup, true, \ 2523 "Delay invoking the compiler until main application class is " \ 2524 "loaded") \ 2525 \ 2526 develop(bool, CompileTheWorld, false, \ 2527 "Compile all methods in all classes in bootstrap class path " \ 2528 "(stress test)") \ 2529 \ 2530 develop(bool, CompileTheWorldPreloadClasses, true, \ 2531 "Preload all classes used by a class before start loading") \ 2532 \ 2533 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2534 "Force a safepoint every n compiles so sweeper can keep up") \ 2535 \ 2536 develop(bool, FillDelaySlots, true, \ 2537 "Fill delay slots (on SPARC only)") \ 2538 \ 2539 develop(bool, TimeLivenessAnalysis, false, \ 2540 "Time computation of bytecode liveness analysis") \ 2541 \ 2542 develop(bool, TraceLivenessGen, false, \ 2543 "Trace the generation of liveness analysis information") \ 2544 \ 2545 notproduct(bool, TraceLivenessQuery, false, \ 2546 "Trace queries of liveness analysis information") \ 2547 \ 2548 notproduct(bool, CollectIndexSetStatistics, false, \ 2549 "Collect information about IndexSets") \ 2550 \ 2551 develop(bool, UseLoopSafepoints, true, \ 2552 "Generate Safepoint nodes in every loop") \ 2553 \ 2554 develop(intx, FastAllocateSizeLimit, 128*K, \ 2555 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2556 "Inline allocations larger than this in doublewords must go slow")\ 2557 \ 2558 product(bool, AggressiveOpts, false, \ 2559 "Enable aggressive optimizations - see arguments.cpp") \ 2560 \ 2561 product(bool, UseStringCache, false, \ 2562 "Enable String cache capabilities on String.java") \ 2563 \ 2564 /* statistics */ \ 2565 develop(bool, CountCompiledCalls, false, \ 2566 "counts method invocations") \ 2567 \ 2568 notproduct(bool, CountRuntimeCalls, false, \ 2569 "counts VM runtime calls") \ 2570 \ 2571 develop(bool, CountJNICalls, false, \ 2572 "counts jni method invocations") \ 2573 \ 2574 notproduct(bool, CountJVMCalls, false, \ 2575 "counts jvm method invocations") \ 2576 \ 2577 notproduct(bool, CountRemovableExceptions, false, \ 2578 "count exceptions that could be replaced by branches due to " \ 2579 "inlining") \ 2580 \ 2581 notproduct(bool, ICMissHistogram, false, \ 2582 "produce histogram of IC misses") \ 2583 \ 2584 notproduct(bool, PrintClassStatistics, false, \ 2585 "prints class statistics at end of run") \ 2586 \ 2587 notproduct(bool, PrintMethodStatistics, false, \ 2588 "prints method statistics at end of run") \ 2589 \ 2590 /* interpreter */ \ 2591 develop(bool, ClearInterpreterLocals, false, \ 2592 "Always clear local variables of interpreter activations upon " \ 2593 "entry") \ 2594 \ 2595 product_pd(bool, RewriteBytecodes, \ 2596 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2597 \ 2598 product_pd(bool, RewriteFrequentPairs, \ 2599 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2600 \ 2601 diagnostic(bool, PrintInterpreter, false, \ 2602 "Prints the generated interpreter code") \ 2603 \ 2604 product(bool, UseInterpreter, true, \ 2605 "Use interpreter for non-compiled methods") \ 2606 \ 2607 develop(bool, UseFastSignatureHandlers, true, \ 2608 "Use fast signature handlers for native calls") \ 2609 \ 2610 product(bool, UseLoopCounter, true, \ 2611 "Increment invocation counter on backward branch") \ 2612 \ 2613 product(bool, UseFastEmptyMethods, true, \ 2614 "Use fast method entry code for empty methods") \ 2615 \ 2616 product(bool, UseFastAccessorMethods, true, \ 2617 "Use fast method entry code for accessor methods") \ 2618 \ 2619 product_pd(bool, UseOnStackReplacement, \ 2620 "Use on stack replacement, calls runtime if invoc. counter " \ 2621 "overflows in loop") \ 2622 \ 2623 notproduct(bool, TraceOnStackReplacement, false, \ 2624 "Trace on stack replacement") \ 2625 \ 2626 product_pd(bool, PreferInterpreterNativeStubs, \ 2627 "Use always interpreter stubs for native methods invoked via " \ 2628 "interpreter") \ 2629 \ 2630 develop(bool, CountBytecodes, false, \ 2631 "Count number of bytecodes executed") \ 2632 \ 2633 develop(bool, PrintBytecodeHistogram, false, \ 2634 "Print histogram of the executed bytecodes") \ 2635 \ 2636 develop(bool, PrintBytecodePairHistogram, false, \ 2637 "Print histogram of the executed bytecode pairs") \ 2638 \ 2639 diagnostic(bool, PrintSignatureHandlers, false, \ 2640 "Print code generated for native method signature handlers") \ 2641 \ 2642 develop(bool, VerifyOops, false, \ 2643 "Do plausibility checks for oops") \ 2644 \ 2645 develop(bool, CheckUnhandledOops, false, \ 2646 "Check for unhandled oops in VM code") \ 2647 \ 2648 develop(bool, VerifyJNIFields, trueInDebug, \ 2649 "Verify jfieldIDs for instance fields") \ 2650 \ 2651 notproduct(bool, VerifyJNIEnvThread, false, \ 2652 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2653 "from JNI") \ 2654 \ 2655 develop(bool, VerifyFPU, false, \ 2656 "Verify FPU state (check for NaN's, etc.)") \ 2657 \ 2658 develop(bool, VerifyThread, false, \ 2659 "Watch the thread register for corruption (SPARC only)") \ 2660 \ 2661 develop(bool, VerifyActivationFrameSize, false, \ 2662 "Verify that activation frame didn't become smaller than its " \ 2663 "minimal size") \ 2664 \ 2665 develop(bool, TraceFrequencyInlining, false, \ 2666 "Trace frequency based inlining") \ 2667 \ 2668 develop_pd(bool, InlineIntrinsics, \ 2669 "Inline intrinsics that can be statically resolved") \ 2670 \ 2671 product_pd(bool, ProfileInterpreter, \ 2672 "Profile at the bytecode level during interpretation") \ 2673 \ 2674 develop_pd(bool, ProfileTraps, \ 2675 "Profile deoptimization traps at the bytecode level") \ 2676 \ 2677 product(intx, ProfileMaturityPercentage, 20, \ 2678 "number of method invocations/branches (expressed as % of " \ 2679 "CompileThreshold) before using the method's profile") \ 2680 \ 2681 develop(bool, PrintMethodData, false, \ 2682 "Print the results of +ProfileInterpreter at end of run") \ 2683 \ 2684 develop(bool, VerifyDataPointer, trueInDebug, \ 2685 "Verify the method data pointer during interpreter profiling") \ 2686 \ 2687 develop(bool, VerifyCompiledCode, false, \ 2688 "Include miscellaneous runtime verifications in nmethod code; " \ 2689 "default off because it disturbs nmethod size heuristics") \ 2690 \ 2691 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2692 "Manually make GC thread crash then dump java stack trace; " \ 2693 "Test only") \ 2694 \ 2695 /* compilation */ \ 2696 product(bool, UseCompiler, true, \ 2697 "use compilation") \ 2698 \ 2699 develop(bool, TraceCompilationPolicy, false, \ 2700 "Trace compilation policy") \ 2701 \ 2702 develop(bool, TimeCompilationPolicy, false, \ 2703 "Time the compilation policy") \ 2704 \ 2705 product(bool, UseCounterDecay, true, \ 2706 "adjust recompilation counters") \ 2707 \ 2708 develop(intx, CounterHalfLifeTime, 30, \ 2709 "half-life time of invocation counters (in secs)") \ 2710 \ 2711 develop(intx, CounterDecayMinIntervalLength, 500, \ 2712 "Min. ms. between invocation of CounterDecay") \ 2713 \ 2714 product(bool, AlwaysCompileLoopMethods, false, \ 2715 "when using recompilation, never interpret methods " \ 2716 "containing loops") \ 2717 \ 2718 product(bool, DontCompileHugeMethods, true, \ 2719 "don't compile methods > HugeMethodLimit") \ 2720 \ 2721 /* Bytecode escape analysis estimation. */ \ 2722 product(bool, EstimateArgEscape, true, \ 2723 "Analyze bytecodes to estimate escape state of arguments") \ 2724 \ 2725 product(intx, BCEATraceLevel, 0, \ 2726 "How much tracing to do of bytecode escape analysis estimates") \ 2727 \ 2728 product(intx, MaxBCEAEstimateLevel, 5, \ 2729 "Maximum number of nested calls that are analyzed by BC EA.") \ 2730 \ 2731 product(intx, MaxBCEAEstimateSize, 150, \ 2732 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2733 \ 2734 product(intx, AllocatePrefetchStyle, 1, \ 2735 "0 = no prefetch, " \ 2736 "1 = prefetch instructions for each allocation, " \ 2737 "2 = use TLAB watermark to gate allocation prefetch, " \ 2738 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2739 \ 2740 product(intx, AllocatePrefetchDistance, -1, \ 2741 "Distance to prefetch ahead of allocation pointer") \ 2742 \ 2743 product(intx, AllocatePrefetchLines, 3, \ 2744 "Number of lines to prefetch ahead of array allocation pointer") \ 2745 \ 2746 product(intx, AllocateInstancePrefetchLines, 1, \ 2747 "Number of lines to prefetch ahead of instance allocation pointer") \ 2748 \ 2749 product(intx, AllocatePrefetchStepSize, 16, \ 2750 "Step size in bytes of sequential prefetch instructions") \ 2751 \ 2752 product(intx, AllocatePrefetchInstr, 0, \ 2753 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2754 \ 2755 /* deoptimization */ \ 2756 develop(bool, TraceDeoptimization, false, \ 2757 "Trace deoptimization") \ 2758 \ 2759 develop(bool, DebugDeoptimization, false, \ 2760 "Tracing various information while debugging deoptimization") \ 2761 \ 2762 product(intx, SelfDestructTimer, 0, \ 2763 "Will cause VM to terminate after a given time (in minutes) " \ 2764 "(0 means off)") \ 2765 \ 2766 product(intx, MaxJavaStackTraceDepth, 1024, \ 2767 "Max. no. of lines in the stack trace for Java exceptions " \ 2768 "(0 means all)") \ 2769 \ 2770 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2771 "Guarantee a safepoint (at least) every so many milliseconds " \ 2772 "(0 means none)")) \ 2773 \ 2774 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2775 "Guarantee a safepoint (at least) every so many milliseconds " \ 2776 "(0 means none)")) \ 2777 \ 2778 product(intx, SafepointTimeoutDelay, 10000, \ 2779 "Delay in milliseconds for option SafepointTimeout") \ 2780 \ 2781 product(intx, NmethodSweepFraction, 16, \ 2782 "Number of invocations of sweeper to cover all nmethods") \ 2783 \ 2784 product(intx, NmethodSweepCheckInterval, 5, \ 2785 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2786 \ 2787 notproduct(bool, LogSweeper, false, \ 2788 "Keep a ring buffer of sweeper activity") \ 2789 \ 2790 notproduct(intx, SweeperLogEntries, 1024, \ 2791 "Number of records in the ring buffer of sweeper activity") \ 2792 \ 2793 notproduct(intx, MemProfilingInterval, 500, \ 2794 "Time between each invocation of the MemProfiler") \ 2795 \ 2796 develop(intx, MallocCatchPtr, -1, \ 2797 "Hit breakpoint when mallocing/freeing this pointer") \ 2798 \ 2799 notproduct(intx, AssertRepeat, 1, \ 2800 "number of times to evaluate expression in assert " \ 2801 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2802 \ 2803 notproduct(ccstrlist, SuppressErrorAt, "", \ 2804 "List of assertions (file:line) to muzzle") \ 2805 \ 2806 notproduct(uintx, HandleAllocationLimit, 1024, \ 2807 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2808 "is used") \ 2809 \ 2810 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2811 "Threshold for total handle allocation when " \ 2812 "+TraceHandleAllocation is used") \ 2813 \ 2814 develop(intx, StackPrintLimit, 100, \ 2815 "number of stack frames to print in VM-level stack dump") \ 2816 \ 2817 notproduct(intx, MaxElementPrintSize, 256, \ 2818 "maximum number of elements to print") \ 2819 \ 2820 notproduct(intx, MaxSubklassPrintSize, 4, \ 2821 "maximum number of subklasses to print when printing klass") \ 2822 \ 2823 product(intx, MaxInlineLevel, 9, \ 2824 "maximum number of nested calls that are inlined") \ 2825 \ 2826 product(intx, MaxRecursiveInlineLevel, 1, \ 2827 "maximum number of nested recursive calls that are inlined") \ 2828 \ 2829 product_pd(intx, InlineSmallCode, \ 2830 "Only inline already compiled methods if their code size is " \ 2831 "less than this") \ 2832 \ 2833 product(intx, MaxInlineSize, 35, \ 2834 "maximum bytecode size of a method to be inlined") \ 2835 \ 2836 product_pd(intx, FreqInlineSize, \ 2837 "maximum bytecode size of a frequent method to be inlined") \ 2838 \ 2839 product(intx, MaxTrivialSize, 6, \ 2840 "maximum bytecode size of a trivial method to be inlined") \ 2841 \ 2842 product(intx, MinInliningThreshold, 250, \ 2843 "min. invocation count a method needs to have to be inlined") \ 2844 \ 2845 develop(intx, MethodHistogramCutoff, 100, \ 2846 "cutoff value for method invoc. histogram (+CountCalls)") \ 2847 \ 2848 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2849 "# of interpreted methods to show in profile") \ 2850 \ 2851 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2852 "# of compiled methods to show in profile") \ 2853 \ 2854 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2855 "# of stub methods to show in profile") \ 2856 \ 2857 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2858 "# of runtime stub nodes to show in profile") \ 2859 \ 2860 product(intx, ProfileIntervalsTicks, 100, \ 2861 "# of ticks between printing of interval profile " \ 2862 "(+ProfileIntervals)") \ 2863 \ 2864 notproduct(intx, ScavengeALotInterval, 1, \ 2865 "Interval between which scavenge will occur with +ScavengeALot") \ 2866 \ 2867 notproduct(intx, FullGCALotInterval, 1, \ 2868 "Interval between which full gc will occur with +FullGCALot") \ 2869 \ 2870 notproduct(intx, FullGCALotStart, 0, \ 2871 "For which invocation to start FullGCAlot") \ 2872 \ 2873 notproduct(intx, FullGCALotDummies, 32*K, \ 2874 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2875 "to move") \ 2876 \ 2877 develop(intx, DontYieldALotInterval, 10, \ 2878 "Interval between which yields will be dropped (milliseconds)") \ 2879 \ 2880 develop(intx, MinSleepInterval, 1, \ 2881 "Minimum sleep() interval (milliseconds) when " \ 2882 "ConvertSleepToYield is off (used for SOLARIS)") \ 2883 \ 2884 develop(intx, ProfilerPCTickThreshold, 15, \ 2885 "Number of ticks in a PC buckets to be a hotspot") \ 2886 \ 2887 notproduct(intx, DeoptimizeALotInterval, 5, \ 2888 "Number of exits until DeoptimizeALot kicks in") \ 2889 \ 2890 notproduct(intx, ZombieALotInterval, 5, \ 2891 "Number of exits until ZombieALot kicks in") \ 2892 \ 2893 develop(bool, StressNonEntrant, false, \ 2894 "Mark nmethods non-entrant at registration") \ 2895 \ 2896 diagnostic(intx, MallocVerifyInterval, 0, \ 2897 "if non-zero, verify C heap after every N calls to " \ 2898 "malloc/realloc/free") \ 2899 \ 2900 diagnostic(intx, MallocVerifyStart, 0, \ 2901 "if non-zero, start verifying C heap after Nth call to " \ 2902 "malloc/realloc/free") \ 2903 \ 2904 product(intx, TypeProfileWidth, 2, \ 2905 "number of receiver types to record in call/cast profile") \ 2906 \ 2907 develop(intx, BciProfileWidth, 2, \ 2908 "number of return bci's to record in ret profile") \ 2909 \ 2910 product(intx, PerMethodRecompilationCutoff, 400, \ 2911 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2912 \ 2913 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2914 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2915 \ 2916 product(intx, PerMethodTrapLimit, 100, \ 2917 "Limit on traps (of one kind) in a method (includes inlines)") \ 2918 \ 2919 product(intx, PerBytecodeTrapLimit, 4, \ 2920 "Limit on traps (of one kind) at a particular BCI") \ 2921 \ 2922 develop(intx, InlineFrequencyRatio, 20, \ 2923 "Ratio of call site execution to caller method invocation") \ 2924 \ 2925 develop_pd(intx, InlineFrequencyCount, \ 2926 "Count of call site execution necessary to trigger frequent " \ 2927 "inlining") \ 2928 \ 2929 develop(intx, InlineThrowCount, 50, \ 2930 "Force inlining of interpreted methods that throw this often") \ 2931 \ 2932 develop(intx, InlineThrowMaxSize, 200, \ 2933 "Force inlining of throwing methods smaller than this") \ 2934 \ 2935 develop(intx, ProfilerNodeSize, 1024, \ 2936 "Size in K to allocate for the Profile Nodes of each thread") \ 2937 \ 2938 product_pd(intx, PreInflateSpin, \ 2939 "Number of times to spin wait before inflation") \ 2940 \ 2941 /* gc parameters */ \ 2942 product(uintx, InitialHeapSize, 0, \ 2943 "Initial heap size (in bytes); zero means OldSize + NewSize") \ 2944 \ 2945 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 2946 "Maximum heap size (in bytes)") \ 2947 \ 2948 product(uintx, OldSize, ScaleForWordSize(4*M), \ 2949 "Initial tenured generation size (in bytes)") \ 2950 \ 2951 product(uintx, NewSize, ScaleForWordSize(1*M), \ 2952 "Initial new generation size (in bytes)") \ 2953 \ 2954 product(uintx, MaxNewSize, max_uintx, \ 2955 "Maximum new generation size (in bytes), max_uintx means set " \ 2956 "ergonomically") \ 2957 \ 2958 product(uintx, PretenureSizeThreshold, 0, \ 2959 "Maximum size in bytes of objects allocated in DefNew " \ 2960 "generation; zero means no maximum") \ 2961 \ 2962 product(uintx, TLABSize, 0, \ 2963 "Starting TLAB size (in bytes); zero means set ergonomically") \ 2964 \ 2965 product(uintx, MinTLABSize, 2*K, \ 2966 "Minimum allowed TLAB size (in bytes)") \ 2967 \ 2968 product(uintx, TLABAllocationWeight, 35, \ 2969 "Allocation averaging weight") \ 2970 \ 2971 product(uintx, TLABWasteTargetPercent, 1, \ 2972 "Percentage of Eden that can be wasted") \ 2973 \ 2974 product(uintx, TLABRefillWasteFraction, 64, \ 2975 "Max TLAB waste at a refill (internal fragmentation)") \ 2976 \ 2977 product(uintx, TLABWasteIncrement, 4, \ 2978 "Increment allowed waste at slow allocation") \ 2979 \ 2980 product(intx, SurvivorRatio, 8, \ 2981 "Ratio of eden/survivor space size") \ 2982 \ 2983 product(intx, NewRatio, 2, \ 2984 "Ratio of new/old generation sizes") \ 2985 \ 2986 product_pd(uintx, NewSizeThreadIncrease, \ 2987 "Additional size added to desired new generation size per " \ 2988 "non-daemon thread (in bytes)") \ 2989 \ 2990 product_pd(uintx, MetaspaceSize, \ 2991 "Initial size of Metaspaces (in bytes)") \ 2992 \ 2993 product(uintx, MaxMetaspaceSize, max_uintx, \ 2994 "Maximum size of Metaspaces (in bytes)") \ 2995 \ 2996 product(uintx, ClassMetaspaceSize, 2*M, \ 2997 "Maximum size of InstanceKlass area in Metaspace used for " \ 2998 "UseCompressedKlassPointers") \ 2999 \ 3000 product(uintx, MinHeapFreeRatio, 40, \ 3001 "Min percentage of heap free after GC to avoid expansion") \ 3002 \ 3003 product(uintx, MaxHeapFreeRatio, 70, \ 3004 "Max percentage of heap free after GC to avoid shrinking") \ 3005 \ 3006 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3007 "Number of milliseconds per MB of free space in the heap") \ 3008 \ 3009 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3010 "Min change in heap space due to GC (in bytes)") \ 3011 \ 3012 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3013 "Min expansion of permanent heap (in bytes)") \ 3014 \ 3015 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3016 "Max expansion of permanent heap without full GC (in bytes)") \ 3017 \ 3018 product(intx, QueuedAllocationWarningCount, 0, \ 3019 "Number of times an allocation that queues behind a GC " \ 3020 "will retry before printing a warning") \ 3021 \ 3022 diagnostic(uintx, VerifyGCStartAt, 0, \ 3023 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3024 \ 3025 diagnostic(intx, VerifyGCLevel, 0, \ 3026 "Generation level at which to start +VerifyBefore/AfterGC") \ 3027 \ 3028 product(uintx, MaxTenuringThreshold, 15, \ 3029 "Maximum value for tenuring threshold") \ 3030 \ 3031 product(uintx, InitialTenuringThreshold, 7, \ 3032 "Initial value for tenuring threshold") \ 3033 \ 3034 product(intx, TargetSurvivorRatio, 50, \ 3035 "Desired percentage of survivor space used after scavenge") \ 3036 \ 3037 product(uintx, MarkSweepDeadRatio, 5, \ 3038 "Percentage (0-100) of the old gen allowed as dead wood." \ 3039 "Serial mark sweep treats this as both the min and max value." \ 3040 "CMS uses this value only if it falls back to mark sweep." \ 3041 "Par compact uses a variable scale based on the density of the" \ 3042 "generation and treats this as the max value when the heap is" \ 3043 "either completely full or completely empty. Par compact also" \ 3044 "has a smaller default value; see arguments.cpp.") \ 3045 \ 3046 product(intx, MarkSweepAlwaysCompactCount, 4, \ 3047 "How often should we fully compact the heap (ignoring the dead " \ 3048 "space parameters)") \ 3049 \ 3050 product(intx, PrintCMSStatistics, 0, \ 3051 "Statistics for CMS") \ 3052 \ 3053 product(bool, PrintCMSInitiationStatistics, false, \ 3054 "Statistics for initiating a CMS collection") \ 3055 \ 3056 product(intx, PrintFLSStatistics, 0, \ 3057 "Statistics for CMS' FreeListSpace") \ 3058 \ 3059 product(intx, PrintFLSCensus, 0, \ 3060 "Census for CMS' FreeListSpace") \ 3061 \ 3062 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3063 "Delay in ms between expansion and allocation") \ 3064 \ 3065 develop(uintx, GCWorkerDelayMillis, 0, \ 3066 "Delay in ms in scheduling GC workers") \ 3067 \ 3068 product(intx, DeferThrSuspendLoopCount, 4000, \ 3069 "(Unstable) Number of times to iterate in safepoint loop " \ 3070 " before blocking VM threads ") \ 3071 \ 3072 product(intx, DeferPollingPageLoopCount, -1, \ 3073 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3074 "before changing safepoint polling page to RO ") \ 3075 \ 3076 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3077 \ 3078 product(bool, PSChunkLargeArrays, true, \ 3079 "true: process large arrays in chunks") \ 3080 \ 3081 product(uintx, GCDrainStackTargetSize, 64, \ 3082 "how many entries we'll try to leave on the stack during " \ 3083 "parallel GC") \ 3084 \ 3085 /* stack parameters */ \ 3086 product_pd(intx, StackYellowPages, \ 3087 "Number of yellow zone (recoverable overflows) pages") \ 3088 \ 3089 product_pd(intx, StackRedPages, \ 3090 "Number of red zone (unrecoverable overflows) pages") \ 3091 \ 3092 product_pd(intx, StackShadowPages, \ 3093 "Number of shadow zone (for overflow checking) pages" \ 3094 " this should exceed the depth of the VM and native call stack") \ 3095 \ 3096 product_pd(intx, ThreadStackSize, \ 3097 "Thread Stack Size (in Kbytes)") \ 3098 \ 3099 product_pd(intx, VMThreadStackSize, \ 3100 "Non-Java Thread Stack Size (in Kbytes)") \ 3101 \ 3102 product_pd(intx, CompilerThreadStackSize, \ 3103 "Compiler Thread Stack Size (in Kbytes)") \ 3104 \ 3105 develop_pd(uintx, JVMInvokeMethodSlack, \ 3106 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3107 \ 3108 product(uintx, ThreadSafetyMargin, 50*M, \ 3109 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3110 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3111 "disable this feature") \ 3112 \ 3113 /* code cache parameters */ \ 3114 develop(uintx, CodeCacheSegmentSize, 64, \ 3115 "Code cache segment size (in bytes) - smallest unit of " \ 3116 "allocation") \ 3117 \ 3118 develop_pd(intx, CodeEntryAlignment, \ 3119 "Code entry alignment for generated code (in bytes)") \ 3120 \ 3121 product_pd(intx, OptoLoopAlignment, \ 3122 "Align inner loops to zero relative to this modulus") \ 3123 \ 3124 product_pd(uintx, InitialCodeCacheSize, \ 3125 "Initial code cache size (in bytes)") \ 3126 \ 3127 product_pd(uintx, ReservedCodeCacheSize, \ 3128 "Reserved code cache size (in bytes) - maximum code cache size") \ 3129 \ 3130 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3131 "When less than X space left, we stop compiling.") \ 3132 \ 3133 product_pd(uintx, CodeCacheExpansionSize, \ 3134 "Code cache expansion size (in bytes)") \ 3135 \ 3136 develop_pd(uintx, CodeCacheMinBlockLength, \ 3137 "Minimum number of segments in a code cache block.") \ 3138 \ 3139 notproduct(bool, ExitOnFullCodeCache, false, \ 3140 "Exit the VM if we fill the code cache.") \ 3141 \ 3142 product(bool, UseCodeCacheFlushing, true, \ 3143 "Attempt to clean the code cache before shutting off compiler") \ 3144 \ 3145 product(intx, MinCodeCacheFlushingInterval, 30, \ 3146 "Min number of seconds between code cache cleaning sessions") \ 3147 \ 3148 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3149 "When less than X space left, start code cache cleaning") \ 3150 \ 3151 /* interpreter debugging */ \ 3152 develop(intx, BinarySwitchThreshold, 5, \ 3153 "Minimal number of lookupswitch entries for rewriting to binary " \ 3154 "switch") \ 3155 \ 3156 develop(intx, StopInterpreterAt, 0, \ 3157 "Stops interpreter execution at specified bytecode number") \ 3158 \ 3159 develop(intx, TraceBytecodesAt, 0, \ 3160 "Traces bytecodes starting with specified bytecode number") \ 3161 \ 3162 /* compiler interface */ \ 3163 develop(intx, CIStart, 0, \ 3164 "the id of the first compilation to permit") \ 3165 \ 3166 develop(intx, CIStop, -1, \ 3167 "the id of the last compilation to permit") \ 3168 \ 3169 develop(intx, CIStartOSR, 0, \ 3170 "the id of the first osr compilation to permit " \ 3171 "(CICountOSR must be on)") \ 3172 \ 3173 develop(intx, CIStopOSR, -1, \ 3174 "the id of the last osr compilation to permit " \ 3175 "(CICountOSR must be on)") \ 3176 \ 3177 develop(intx, CIBreakAtOSR, -1, \ 3178 "id of osr compilation to break at") \ 3179 \ 3180 develop(intx, CIBreakAt, -1, \ 3181 "id of compilation to break at") \ 3182 \ 3183 product(ccstrlist, CompileOnly, "", \ 3184 "List of methods (pkg/class.name) to restrict compilation to") \ 3185 \ 3186 product(ccstr, CompileCommandFile, NULL, \ 3187 "Read compiler commands from this file [.hotspot_compiler]") \ 3188 \ 3189 product(ccstrlist, CompileCommand, "", \ 3190 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3191 \ 3192 develop(bool, ReplayCompiles, false, \ 3193 "Enable replay of compilations from ReplayDataFile") \ 3194 \ 3195 develop(ccstr, ReplayDataFile, "replay.txt", \ 3196 "file containing compilation replay information") \ 3197 \ 3198 develop(intx, ReplaySuppressInitializers, 2, \ 3199 "Controls handling of class initialization during replay" \ 3200 "0 - don't do anything special" \ 3201 "1 - treat all class initializers as empty" \ 3202 "2 - treat class initializers for application classes as empty" \ 3203 "3 - allow all class initializers to run during bootstrap but" \ 3204 " pretend they are empty after starting replay") \ 3205 \ 3206 develop(bool, ReplayIgnoreInitErrors, false, \ 3207 "Ignore exceptions thrown during initialization for replay") \ 3208 \ 3209 develop(bool, DumpReplayDataOnError, true, \ 3210 "record replay data for crashing compiler threads") \ 3211 \ 3212 product(bool, CICompilerCountPerCPU, false, \ 3213 "1 compiler thread for log(N CPUs)") \ 3214 \ 3215 develop(intx, CIFireOOMAt, -1, \ 3216 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3217 "(non-negative value throws OOM after this many CI accesses " \ 3218 "in each compile)") \ 3219 \ 3220 notproduct(bool, CIObjectFactoryVerify, false, \ 3221 "enable potentially expensive verification in ciObjectFactory") \ 3222 \ 3223 /* Priorities */ \ 3224 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3225 \ 3226 product(intx, ThreadPriorityPolicy, 0, \ 3227 "0 : Normal. "\ 3228 " VM chooses priorities that are appropriate for normal "\ 3229 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3230 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3231 " map to lower native priority values. On Windows applications"\ 3232 " are allowed to use higher native priorities. However, with "\ 3233 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3234 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3235 " interfere with system threads. On Linux thread priorities "\ 3236 " are ignored because the OS does not support static priority "\ 3237 " in SCHED_OTHER scheduling class which is the only choice for"\ 3238 " non-root, non-realtime applications. "\ 3239 "1 : Aggressive. "\ 3240 " Java thread priorities map over to the entire range of "\ 3241 " native thread priorities. Higher Java thread priorities map "\ 3242 " to higher native thread priorities. This policy should be "\ 3243 " used with care, as sometimes it can cause performance "\ 3244 " degradation in the application and/or the entire system. On "\ 3245 " Linux this policy requires root privilege.") \ 3246 \ 3247 product(bool, ThreadPriorityVerbose, false, \ 3248 "Print priority changes") \ 3249 \ 3250 product(intx, DefaultThreadPriority, -1, \ 3251 "The native priority at which threads run if not elsewhere " \ 3252 "specified (-1 means no change)") \ 3253 \ 3254 product(intx, CompilerThreadPriority, -1, \ 3255 "The native priority at which compiler threads should run " \ 3256 "(-1 means no change)") \ 3257 \ 3258 product(intx, VMThreadPriority, -1, \ 3259 "The native priority at which the VM thread should run " \ 3260 "(-1 means no change)") \ 3261 \ 3262 product(bool, CompilerThreadHintNoPreempt, true, \ 3263 "(Solaris only) Give compiler threads an extra quanta") \ 3264 \ 3265 product(bool, VMThreadHintNoPreempt, false, \ 3266 "(Solaris only) Give VM thread an extra quanta") \ 3267 \ 3268 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3269 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3270 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3271 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3272 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3273 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3274 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3275 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3276 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3277 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3278 \ 3279 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3280 "Java thread priority 10 maps to critical scheduling priority") \ 3281 \ 3282 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3283 "Compiler thread(s) run at critical scheduling priority") \ 3284 \ 3285 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3286 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3287 \ 3288 /* compiler debugging */ \ 3289 notproduct(intx, CompileTheWorldStartAt, 1, \ 3290 "First class to consider when using +CompileTheWorld") \ 3291 \ 3292 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3293 "Last class to consider when using +CompileTheWorld") \ 3294 \ 3295 develop(intx, NewCodeParameter, 0, \ 3296 "Testing Only: Create a dedicated integer parameter before " \ 3297 "putback") \ 3298 \ 3299 /* new oopmap storage allocation */ \ 3300 develop(intx, MinOopMapAllocation, 8, \ 3301 "Minimum number of OopMap entries in an OopMapSet") \ 3302 \ 3303 /* Background Compilation */ \ 3304 develop(intx, LongCompileThreshold, 50, \ 3305 "Used with +TraceLongCompiles") \ 3306 \ 3307 product(intx, StarvationMonitorInterval, 200, \ 3308 "Pause between each check in ms") \ 3309 \ 3310 /* recompilation */ \ 3311 product_pd(intx, CompileThreshold, \ 3312 "number of interpreted method invocations before (re-)compiling") \ 3313 \ 3314 product_pd(intx, BackEdgeThreshold, \ 3315 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3316 \ 3317 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3318 "Interpreter (tier 0) invocation notification frequency.") \ 3319 \ 3320 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3321 "C1 without MDO (tier 2) invocation notification frequency.") \ 3322 \ 3323 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3324 "C1 with MDO profiling (tier 3) invocation notification " \ 3325 "frequency.") \ 3326 \ 3327 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3328 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3329 \ 3330 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3331 "Interpreter (tier 0) invocation notification frequency.") \ 3332 \ 3333 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3334 "C1 without MDO (tier 2) invocation notification frequency.") \ 3335 \ 3336 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3337 "C1 with MDO profiling (tier 3) invocation notification " \ 3338 "frequency.") \ 3339 \ 3340 product(intx, Tier2CompileThreshold, 0, \ 3341 "threshold at which tier 2 compilation is invoked") \ 3342 \ 3343 product(intx, Tier2BackEdgeThreshold, 0, \ 3344 "Back edge threshold at which tier 2 compilation is invoked") \ 3345 \ 3346 product(intx, Tier3InvocationThreshold, 200, \ 3347 "Compile if number of method invocations crosses this " \ 3348 "threshold") \ 3349 \ 3350 product(intx, Tier3MinInvocationThreshold, 100, \ 3351 "Minimum invocation to compile at tier 3") \ 3352 \ 3353 product(intx, Tier3CompileThreshold, 2000, \ 3354 "Threshold at which tier 3 compilation is invoked (invocation " \ 3355 "minimum must be satisfied.") \ 3356 \ 3357 product(intx, Tier3BackEdgeThreshold, 60000, \ 3358 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3359 \ 3360 product(intx, Tier4InvocationThreshold, 5000, \ 3361 "Compile if number of method invocations crosses this " \ 3362 "threshold") \ 3363 \ 3364 product(intx, Tier4MinInvocationThreshold, 600, \ 3365 "Minimum invocation to compile at tier 4") \ 3366 \ 3367 product(intx, Tier4CompileThreshold, 15000, \ 3368 "Threshold at which tier 4 compilation is invoked (invocation " \ 3369 "minimum must be satisfied.") \ 3370 \ 3371 product(intx, Tier4BackEdgeThreshold, 40000, \ 3372 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3373 \ 3374 product(intx, Tier3DelayOn, 5, \ 3375 "If C2 queue size grows over this amount per compiler thread " \ 3376 "stop compiling at tier 3 and start compiling at tier 2") \ 3377 \ 3378 product(intx, Tier3DelayOff, 2, \ 3379 "If C2 queue size is less than this amount per compiler thread " \ 3380 "allow methods compiled at tier 2 transition to tier 3") \ 3381 \ 3382 product(intx, Tier3LoadFeedback, 5, \ 3383 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3384 "reaches this amount per compiler thread") \ 3385 \ 3386 product(intx, Tier4LoadFeedback, 3, \ 3387 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3388 "reaches this amount per compiler thread") \ 3389 \ 3390 product(intx, TieredCompileTaskTimeout, 50, \ 3391 "Kill compile task if method was not used within " \ 3392 "given timeout in milliseconds") \ 3393 \ 3394 product(intx, TieredStopAtLevel, 4, \ 3395 "Stop at given compilation level") \ 3396 \ 3397 product(intx, Tier0ProfilingStartPercentage, 200, \ 3398 "Start profiling in interpreter if the counters exceed tier 3" \ 3399 "thresholds by the specified percentage") \ 3400 \ 3401 product(intx, TieredRateUpdateMinTime, 1, \ 3402 "Minimum rate sampling interval (in milliseconds)") \ 3403 \ 3404 product(intx, TieredRateUpdateMaxTime, 25, \ 3405 "Maximum rate sampling interval (in milliseconds)") \ 3406 \ 3407 product_pd(bool, TieredCompilation, \ 3408 "Enable tiered compilation") \ 3409 \ 3410 product(bool, PrintTieredEvents, false, \ 3411 "Print tiered events notifications") \ 3412 \ 3413 product_pd(intx, OnStackReplacePercentage, \ 3414 "NON_TIERED number of method invocations/branches (expressed as %"\ 3415 "of CompileThreshold) before (re-)compiling OSR code") \ 3416 \ 3417 product(intx, InterpreterProfilePercentage, 33, \ 3418 "NON_TIERED number of method invocations/branches (expressed as %"\ 3419 "of CompileThreshold) before profiling in the interpreter") \ 3420 \ 3421 develop(intx, MaxRecompilationSearchLength, 10, \ 3422 "max. # frames to inspect searching for recompilee") \ 3423 \ 3424 develop(intx, MaxInterpretedSearchLength, 3, \ 3425 "max. # interp. frames to skip when searching for recompilee") \ 3426 \ 3427 develop(intx, DesiredMethodLimit, 8000, \ 3428 "desired max. method size (in bytecodes) after inlining") \ 3429 \ 3430 develop(intx, HugeMethodLimit, 8000, \ 3431 "don't compile methods larger than this if " \ 3432 "+DontCompileHugeMethods") \ 3433 \ 3434 /* New JDK 1.4 reflection implementation */ \ 3435 \ 3436 develop(bool, UseNewReflection, true, \ 3437 "Temporary flag for transition to reflection based on dynamic " \ 3438 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3439 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3440 "changes were needed") \ 3441 \ 3442 develop(bool, VerifyReflectionBytecodes, false, \ 3443 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3444 "in situations like that described in 4486457 or for " \ 3445 "constructors generated for serialization, so can not be enabled "\ 3446 "in product.") \ 3447 \ 3448 product(bool, ReflectionWrapResolutionErrors, true, \ 3449 "Temporary flag for transition to AbstractMethodError wrapped " \ 3450 "in InvocationTargetException. See 6531596") \ 3451 \ 3452 \ 3453 develop(intx, FastSuperclassLimit, 8, \ 3454 "Depth of hardwired instanceof accelerator array") \ 3455 \ 3456 /* Properties for Java libraries */ \ 3457 \ 3458 product(uintx, MaxDirectMemorySize, 0, \ 3459 "Maximum total size of NIO direct-buffer allocations") \ 3460 \ 3461 /* temporary developer defined flags */ \ 3462 \ 3463 diagnostic(bool, UseNewCode, false, \ 3464 "Testing Only: Use the new version while testing") \ 3465 \ 3466 diagnostic(bool, UseNewCode2, false, \ 3467 "Testing Only: Use the new version while testing") \ 3468 \ 3469 diagnostic(bool, UseNewCode3, false, \ 3470 "Testing Only: Use the new version while testing") \ 3471 \ 3472 /* flags for performance data collection */ \ 3473 \ 3474 product(bool, UsePerfData, falseInEmbedded, \ 3475 "Flag to disable jvmstat instrumentation for performance testing" \ 3476 "and problem isolation purposes.") \ 3477 \ 3478 product(bool, PerfDataSaveToFile, false, \ 3479 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3480 \ 3481 product(ccstr, PerfDataSaveFile, NULL, \ 3482 "Save PerfData memory to the specified absolute pathname," \ 3483 "%p in the file name if present will be replaced by pid") \ 3484 \ 3485 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3486 "Data sampling interval in milliseconds") \ 3487 \ 3488 develop(bool, PerfTraceDataCreation, false, \ 3489 "Trace creation of Performance Data Entries") \ 3490 \ 3491 develop(bool, PerfTraceMemOps, false, \ 3492 "Trace PerfMemory create/attach/detach calls") \ 3493 \ 3494 product(bool, PerfDisableSharedMem, false, \ 3495 "Store performance data in standard memory") \ 3496 \ 3497 product(intx, PerfDataMemorySize, 32*K, \ 3498 "Size of performance data memory region. Will be rounded " \ 3499 "up to a multiple of the native os page size.") \ 3500 \ 3501 product(intx, PerfMaxStringConstLength, 1024, \ 3502 "Maximum PerfStringConstant string length before truncation") \ 3503 \ 3504 product(bool, PerfAllowAtExitRegistration, false, \ 3505 "Allow registration of atexit() methods") \ 3506 \ 3507 product(bool, PerfBypassFileSystemCheck, false, \ 3508 "Bypass Win32 file system criteria checks (Windows Only)") \ 3509 \ 3510 product(intx, UnguardOnExecutionViolation, 0, \ 3511 "Unguard page and retry on no-execute fault (Win32 only)" \ 3512 "0=off, 1=conservative, 2=aggressive") \ 3513 \ 3514 /* Serviceability Support */ \ 3515 \ 3516 product(bool, ManagementServer, false, \ 3517 "Create JMX Management Server") \ 3518 \ 3519 product(bool, DisableAttachMechanism, false, \ 3520 "Disable mechanism that allows tools to attach to this VM") \ 3521 \ 3522 product(bool, StartAttachListener, false, \ 3523 "Always start Attach Listener at VM startup") \ 3524 \ 3525 manageable(bool, PrintConcurrentLocks, false, \ 3526 "Print java.util.concurrent locks in thread dump") \ 3527 \ 3528 product(bool, TransmitErrorReport, false, \ 3529 "Enable error report transmission on erroneous termination") \ 3530 \ 3531 product(ccstr, ErrorReportServer, NULL, \ 3532 "Override built-in error report server address") \ 3533 \ 3534 /* Shared spaces */ \ 3535 \ 3536 product(bool, UseSharedSpaces, true, \ 3537 "Use shared spaces for metadata") \ 3538 \ 3539 product(bool, RequireSharedSpaces, false, \ 3540 "Require shared spaces for metadata") \ 3541 \ 3542 product(bool, DumpSharedSpaces, false, \ 3543 "Special mode: JVM reads a class list, loads classes, builds " \ 3544 "shared spaces, and dumps the shared spaces to a file to be " \ 3545 "used in future JVM runs.") \ 3546 \ 3547 product(bool, PrintSharedSpaces, false, \ 3548 "Print usage of shared spaces") \ 3549 \ 3550 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3551 "Size of read-write space for metadata (in bytes)") \ 3552 \ 3553 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3554 "Size of read-only space for metadata (in bytes)") \ 3555 \ 3556 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3557 "Size of the shared miscellaneous data area (in bytes)") \ 3558 \ 3559 product(uintx, SharedMiscCodeSize, 120*K, \ 3560 "Size of the shared miscellaneous code area (in bytes)") \ 3561 \ 3562 product(uintx, SharedDummyBlockSize, 0, \ 3563 "Size of dummy block used to shift heap addresses (in bytes)") \ 3564 \ 3565 diagnostic(bool, EnableInvokeDynamic, true, \ 3566 "support JSR 292 (method handles, invokedynamic, " \ 3567 "anonymous classes") \ 3568 \ 3569 diagnostic(bool, PrintMethodHandleStubs, false, \ 3570 "Print generated stub code for method handles") \ 3571 \ 3572 develop(bool, TraceMethodHandles, false, \ 3573 "trace internal method handle operations") \ 3574 \ 3575 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3576 "perform extra checks when constructing method handles") \ 3577 \ 3578 diagnostic(bool, ShowHiddenFrames, false, \ 3579 "show method handle implementation frames (usually hidden)") \ 3580 \ 3581 experimental(bool, TrustFinalNonStaticFields, false, \ 3582 "trust final non-static declarations for constant folding") \ 3583 \ 3584 develop(bool, TraceInvokeDynamic, false, \ 3585 "trace internal invoke dynamic operations") \ 3586 \ 3587 diagnostic(bool, PauseAtStartup, false, \ 3588 "Causes the VM to pause at startup time and wait for the pause " \ 3589 "file to be removed (default: ./vm.paused.<pid>)") \ 3590 \ 3591 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3592 "The file to create and for whose removal to await when pausing " \ 3593 "at startup. (default: ./vm.paused.<pid>)") \ 3594 \ 3595 diagnostic(bool, PauseAtExit, false, \ 3596 "Pause and wait for keypress on exit if a debugger is attached") \ 3597 \ 3598 product(bool, ExtendedDTraceProbes, false, \ 3599 "Enable performance-impacting dtrace probes") \ 3600 \ 3601 product(bool, DTraceMethodProbes, false, \ 3602 "Enable dtrace probes for method-entry and method-exit") \ 3603 \ 3604 product(bool, DTraceAllocProbes, false, \ 3605 "Enable dtrace probes for object allocation") \ 3606 \ 3607 product(bool, DTraceMonitorProbes, false, \ 3608 "Enable dtrace probes for monitor events") \ 3609 \ 3610 product(bool, RelaxAccessControlCheck, false, \ 3611 "Relax the access control checks in the verifier") \ 3612 \ 3613 diagnostic(bool, PrintDTraceDOF, false, \ 3614 "Print the DTrace DOF passed to the system for JSDT probes") \ 3615 \ 3616 product(uintx, StringTableSize, defaultStringTableSize, \ 3617 "Number of buckets in the interned String table") \ 3618 \ 3619 develop(bool, TraceDefaultMethods, false, \ 3620 "Trace the default method processing steps") \ 3621 \ 3622 develop(bool, ParseAllGenericSignatures, false, \ 3623 "Parse all generic signatures while classloading") \ 3624 \ 3625 develop(bool, VerifyGenericSignatures, false, \ 3626 "Abort VM on erroneous or inconsistent generic signatures") \ 3627 \ 3628 product(bool, UseVMInterruptibleIO, false, \ 3629 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3630 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3631 " of this flag is true for JDK 6 and earlier") \ 3632 \ 3633 diagnostic(bool, WhiteBoxAPI, false, \ 3634 "Enable internal testing APIs") \ 3635 \ 3636 product(bool, PrintGCCause, true, \ 3637 "Include GC cause in GC logging") \ 3638 \ 3639 product(bool, AllowNonVirtualCalls, false, \ 3640 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") 3641 3642/* 3643 * Macros for factoring of globals 3644 */ 3645 3646// Interface macros 3647#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3648#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3649#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3650#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3651#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3652#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3653#ifdef PRODUCT 3654#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3655#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3656#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3657#else 3658#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3659#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3660#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3661#endif 3662// Special LP64 flags, product only needed for now. 3663#ifdef _LP64 3664#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3665#else 3666#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3667#endif // _LP64 3668 3669// Implementation macros 3670#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3671#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3672#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3673#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3674#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3675#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3676#ifdef PRODUCT 3677#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3678#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3679#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3680#else 3681#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3682#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3683#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3684#endif 3685#ifdef _LP64 3686#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3687#else 3688#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3689#endif // _LP64 3690 3691RUNTIME_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) 3692 3693RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3694 3695ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3696 3697// Extensions 3698 3699#include "runtime/globals_ext.hpp" 3700 3701#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3702