globals.hpp revision 3646:9a86ddfc6c8f
1248619Sdes/* 2224638Sbrooks * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 357429Smarkm * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 457429Smarkm * 557429Smarkm * This code is free software; you can redistribute it and/or modify it 657429Smarkm * under the terms of the GNU General Public License version 2 only, as 757429Smarkm * published by the Free Software Foundation. 857429Smarkm * 960573Skris * This code is distributed in the hope that it will be useful, but WITHOUT 1065668Skris * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1165668Skris * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1265668Skris * version 2 for more details (a copy is included in the LICENSE file that 1365668Skris * accompanied this code). 1465668Skris * 1565668Skris * You should have received a copy of the GNU General Public License version 1665668Skris * 2 along with this work; if not, write to the Free Software Foundation, 1760573Skris * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1892555Sdes * 1960573Skris * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2065668Skris * or visit www.oracle.com if you need additional information or have any 2165668Skris * questions. 2265668Skris * 2365668Skris */ 2465668Skris 2565668Skris#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 2665668Skris#define SHARE_VM_RUNTIME_GLOBALS_HPP 2765668Skris 2865668Skris#include "utilities/debug.hpp" 2965668Skris 3065668Skris// use this for flags that are true per default in the tiered build 3165668Skris// but false in non-tiered builds, and vice versa 3265668Skris#ifdef TIERED 3365668Skris#define trueInTiered true 3465668Skris#define falseInTiered false 3565668Skris#else 3665668Skris#define trueInTiered false 3765668Skris#define falseInTiered true 3865668Skris#endif 3957429Smarkm 4057429Smarkm#ifdef TARGET_ARCH_x86 4157429Smarkm# include "globals_x86.hpp" 42162852Sdes#endif 43162852Sdes#ifdef TARGET_ARCH_sparc 44124208Sdes# include "globals_sparc.hpp" 45162852Sdes#endif 46162852Sdes#ifdef TARGET_ARCH_zero 47162852Sdes# include "globals_zero.hpp" 48162852Sdes#endif 49162852Sdes#ifdef TARGET_ARCH_arm 50124208Sdes# include "globals_arm.hpp" 51162852Sdes#endif 52162852Sdes#ifdef TARGET_ARCH_ppc 53162852Sdes# include "globals_ppc.hpp" 54162852Sdes#endif 55162852Sdes#ifdef TARGET_OS_FAMILY_linux 56162852Sdes# include "globals_linux.hpp" 57162852Sdes#endif 58162852Sdes#ifdef TARGET_OS_FAMILY_solaris 59162852Sdes# include "globals_solaris.hpp" 60162852Sdes#endif 61162852Sdes#ifdef TARGET_OS_FAMILY_windows 62162852Sdes# include "globals_windows.hpp" 6357429Smarkm#endif 6457429Smarkm#ifdef TARGET_OS_FAMILY_bsd 6557429Smarkm# include "globals_bsd.hpp" 6657429Smarkm#endif 6757429Smarkm#ifdef TARGET_OS_ARCH_linux_x86 6857429Smarkm# include "globals_linux_x86.hpp" 6960573Skris#endif 7060573Skris#ifdef TARGET_OS_ARCH_linux_sparc 7176259Sgreen# include "globals_linux_sparc.hpp" 7260573Skris#endif 7369587Sgreen#ifdef TARGET_OS_ARCH_linux_zero 74162852Sdes# include "globals_linux_zero.hpp" 7560573Skris#endif 7676259Sgreen#ifdef TARGET_OS_ARCH_solaris_x86 7776259Sgreen# include "globals_solaris_x86.hpp" 7876259Sgreen#endif 7992555Sdes#ifdef TARGET_OS_ARCH_solaris_sparc 8098675Sdes# include "globals_solaris_sparc.hpp" 81197679Sdes#endif 8260573Skris#ifdef TARGET_OS_ARCH_windows_x86 8360573Skris# include "globals_windows_x86.hpp" 8460573Skris#endif 8560573Skris#ifdef TARGET_OS_ARCH_linux_arm 8660573Skris# include "globals_linux_arm.hpp" 8760573Skris#endif 8860573Skris#ifdef TARGET_OS_ARCH_linux_ppc 89192595Sdes# include "globals_linux_ppc.hpp" 90192595Sdes#endif 91197679Sdes#ifdef TARGET_OS_ARCH_bsd_x86 92197679Sdes# include "globals_bsd_x86.hpp" 93197679Sdes#endif 94197679Sdes#ifdef TARGET_OS_ARCH_bsd_zero 95197679Sdes# include "globals_bsd_zero.hpp" 96197679Sdes#endif 9757429Smarkm#ifdef COMPILER1 98197679Sdes#ifdef TARGET_ARCH_x86 99197679Sdes# include "c1_globals_x86.hpp" 100197679Sdes#endif 101197679Sdes#ifdef TARGET_ARCH_sparc 102197679Sdes# include "c1_globals_sparc.hpp" 10357429Smarkm#endif 104197679Sdes#ifdef TARGET_ARCH_arm 105197679Sdes# include "c1_globals_arm.hpp" 106197679Sdes#endif 107197679Sdes#ifdef TARGET_ARCH_ppc 108197679Sdes# include "c1_globals_ppc.hpp" 109197679Sdes#endif 110197679Sdes#ifdef TARGET_OS_FAMILY_linux 111197679Sdes# include "c1_globals_linux.hpp" 112197679Sdes#endif 11357429Smarkm#ifdef TARGET_OS_FAMILY_solaris 114197679Sdes# include "c1_globals_solaris.hpp" 115197679Sdes#endif 11657429Smarkm#ifdef TARGET_OS_FAMILY_windows 117197679Sdes# include "c1_globals_windows.hpp" 118197679Sdes#endif 11957429Smarkm#ifdef TARGET_OS_FAMILY_bsd 120197679Sdes# include "c1_globals_bsd.hpp" 121197679Sdes#endif 12257429Smarkm#endif 123197679Sdes#ifdef COMPILER2 124197679Sdes#ifdef TARGET_ARCH_x86 12557429Smarkm# include "c2_globals_x86.hpp" 126197679Sdes#endif 127197679Sdes#ifdef TARGET_ARCH_sparc 12857429Smarkm# include "c2_globals_sparc.hpp" 129197679Sdes#endif 130197679Sdes#ifdef TARGET_ARCH_arm 13157429Smarkm# include "c2_globals_arm.hpp" 132197679Sdes#endif 133197679Sdes#ifdef TARGET_OS_FAMILY_linux 13457429Smarkm# include "c2_globals_linux.hpp" 135197679Sdes#endif 136197679Sdes#ifdef TARGET_OS_FAMILY_solaris 137197679Sdes# include "c2_globals_solaris.hpp" 13857429Smarkm#endif 139197679Sdes#ifdef TARGET_OS_FAMILY_windows 140197679Sdes# include "c2_globals_windows.hpp" 141197679Sdes#endif 142197679Sdes#ifdef TARGET_OS_FAMILY_bsd 143197679Sdes# include "c2_globals_bsd.hpp" 14457429Smarkm#endif 145197679Sdes#endif 146197679Sdes#ifdef SHARK 14757429Smarkm#ifdef TARGET_ARCH_zero 148197679Sdes# include "shark_globals_zero.hpp" 149197679Sdes#endif 150149749Sdes#endif 151197679Sdes 152197679Sdes#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 153149749Sdesdefine_pd_global(bool, BackgroundCompilation, false); 154197679Sdesdefine_pd_global(bool, UseTLAB, false); 155197679Sdesdefine_pd_global(bool, CICompileOSR, false); 156181111Sdesdefine_pd_global(bool, UseTypeProfile, false); 157197679Sdesdefine_pd_global(bool, UseOnStackReplacement, false); 158197679Sdesdefine_pd_global(bool, InlineIntrinsics, false); 159181111Sdesdefine_pd_global(bool, PreferInterpreterNativeStubs, true); 160197679Sdesdefine_pd_global(bool, ProfileInterpreter, false); 16160573Skrisdefine_pd_global(bool, ProfileTraps, false); 162197679Sdesdefine_pd_global(bool, TieredCompilation, false); 163197679Sdes 164124208Sdesdefine_pd_global(intx, CompileThreshold, 0); 165197679Sdesdefine_pd_global(intx, BackEdgeThreshold, 0); 166197679Sdes 167197679Sdesdefine_pd_global(intx, OnStackReplacePercentage, 0); 16898675Sdesdefine_pd_global(bool, ResizeTLAB, false); 169197679Sdesdefine_pd_global(intx, FreqInlineSize, 0); 170197679Sdesdefine_pd_global(intx, InlineSmallCode, 0); 17160573Skrisdefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 172197679Sdesdefine_pd_global(intx, InlineClassNatives, true); 173197679Sdesdefine_pd_global(intx, InlineUnsafeOps, true); 174197679Sdesdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 175192595Sdesdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 176197679Sdesdefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 177197679Sdesdefine_pd_global(intx, CodeCacheMinBlockLength, 1); 178197679Sdesdefine_pd_global(uintx,MetaspaceSize, ScaleForWordSize(4*M)); 179197679Sdesdefine_pd_global(bool, NeverActAsServerClassMachine, true); 180197679Sdesdefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 181197679Sdes#define CI_COMPILER_COUNT 0 182197679Sdes#else 183197679Sdes 184197679Sdes#ifdef COMPILER2 185197679Sdes#define CI_COMPILER_COUNT 2 186197679Sdes#else 187197679Sdes#define CI_COMPILER_COUNT 1 188197679Sdes#endif // COMPILER2 189197679Sdes 190197679Sdes#endif // no compilers 191197679Sdes 192197679Sdes// string type aliases used only in this file 193197679Sdestypedef const char* ccstr; 194197679Sdestypedef const char* ccstrlist; // represents string arguments which accumulate 195197679Sdes 196124208Sdesenum FlagValueOrigin { 197124208Sdes DEFAULT = 0, 198197679Sdes COMMAND_LINE = 1, 199224638Sbrooks ENVIRON_VAR = 2, 200224638Sbrooks CONFIG_FILE = 3, 201224638Sbrooks MANAGEMENT = 4, 202197679Sdes ERGONOMIC = 5, 203197679Sdes ATTACH_ON_DEMAND = 6, 204197679Sdes INTERNAL = 99 205197679Sdes}; 206221420Sdes 207197679Sdesstruct Flag { 208221420Sdes const char *type; 209221420Sdes const char *name; 210221420Sdes void* addr; 211221420Sdes 212221420Sdes NOT_PRODUCT(const char *doc;) 213197679Sdes 214197679Sdes const char *kind; 21557429Smarkm FlagValueOrigin origin; 21657429Smarkm 21757429Smarkm // points to all Flags static array 21857429Smarkm static Flag *flags; 21957429Smarkm 22057429Smarkm // number of flags 22157429Smarkm static size_t numFlags; 22269587Sgreen 223106121Sdes static Flag* find_flag(char* name, size_t length, bool allow_locked = false); 22469587Sgreen 22569587Sgreen bool is_bool() const { return strcmp(type, "bool") == 0; } 226197679Sdes bool get_bool() const { return *((bool*) addr); } 227197679Sdes void set_bool(bool value) { *((bool*) addr) = value; } 228197679Sdes 229197679Sdes bool is_intx() const { return strcmp(type, "intx") == 0; } 230197679Sdes intx get_intx() const { return *((intx*) addr); } 231137015Sdes void set_intx(intx value) { *((intx*) addr) = value; } 232197679Sdes 233137015Sdes bool is_uintx() const { return strcmp(type, "uintx") == 0; } 234197679Sdes uintx get_uintx() const { return *((uintx*) addr); } 235197679Sdes void set_uintx(uintx value) { *((uintx*) addr) = value; } 236197679Sdes 237197679Sdes bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 238197679Sdes uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 239197679Sdes void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 240197679Sdes 241197679Sdes bool is_double() const { return strcmp(type, "double") == 0; } 242197679Sdes double get_double() const { return *((double*) addr); } 24357429Smarkm void set_double(double value) { *((double*) addr) = value; } 24457429Smarkm 24557429Smarkm bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 246181111Sdes bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 247181111Sdes ccstr get_ccstr() const { return *((ccstr*) addr); } 248181111Sdes void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 249240075Sdes 250197679Sdes bool is_unlocker() const; 251181111Sdes bool is_unlocked() const; 252181111Sdes bool is_writeable() const; 253181111Sdes bool is_external() const; 254197679Sdes 255181111Sdes bool is_unlocker_ext() const; 256197679Sdes bool is_unlocked_ext() const; 257181111Sdes bool is_writeable_ext() const; 258181111Sdes bool is_external_ext() const; 259192595Sdes 260192595Sdes void get_locked_message(char*, int) const; 261192595Sdes void get_locked_message_ext(char*, int) const; 262197679Sdes 263192595Sdes void print_on(outputStream* st, bool withComments = false ); 264192595Sdes void print_as_flag(outputStream* st); 265192595Sdes}; 266197679Sdes 267197679Sdes// debug flags control various aspects of the VM and are global accessible 268197679Sdes 269197679Sdes// use FlagSetting to temporarily change some debug flag 270197679Sdes// e.g. FlagSetting fs(DebugThisAndThat, true); 271197679Sdes// restored to previous value upon leaving scope 272197679Sdesclass FlagSetting { 273192595Sdes bool val; 274192595Sdes bool* flag; 275192595Sdes public: 276192595Sdes FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 277192595Sdes ~FlagSetting() { *flag = val; } 278192595Sdes}; 279192595Sdes 280192595Sdes 281192595Sdesclass CounterSetting { 282248619Sdes intx* counter; 283192595Sdes public: 284192595Sdes CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 285197679Sdes ~CounterSetting() { (*counter)--; } 286197679Sdes}; 287192595Sdes 288197679Sdes 289197679Sdesclass IntFlagSetting { 290192595Sdes intx val; 291192595Sdes intx* flag; 29257429Smarkm public: 29357429Smarkm IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 29457429Smarkm ~IntFlagSetting() { *flag = val; } 29592555Sdes}; 29657429Smarkm 29757429Smarkm 29857429Smarkmclass DoubleFlagSetting { 29957429Smarkm double val; 30057429Smarkm double* flag; 301197679Sdes public: 30257429Smarkm DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 30357429Smarkm ~DoubleFlagSetting() { *flag = val; } 30457429Smarkm}; 305197679Sdes 306197679Sdes 30757429Smarkmclass CommandLineFlags { 30857429Smarkm public: 30957429Smarkm static bool boolAt(char* name, size_t len, bool* value); 310197679Sdes static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 311197679Sdes static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 31257429Smarkm static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 31357429Smarkm 31457429Smarkm static bool intxAt(char* name, size_t len, intx* value); 31557429Smarkm static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 31657429Smarkm static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 31757429Smarkm static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 31857429Smarkm 31957429Smarkm static bool uintxAt(char* name, size_t len, uintx* value); 32098675Sdes static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 32198675Sdes static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 32298675Sdes static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 32398675Sdes 32498675Sdes static bool uint64_tAt(char* name, size_t len, uint64_t* value); 32598675Sdes static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 32698675Sdes static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 32798675Sdes static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 32898675Sdes 32998675Sdes static bool doubleAt(char* name, size_t len, double* value); 33098675Sdes static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 33198675Sdes static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 332197679Sdes static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 33398675Sdes 334197679Sdes static bool ccstrAt(char* name, size_t len, ccstr* value); 33598675Sdes static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 33698675Sdes static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 33798675Sdes static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 33898675Sdes 33998675Sdes // Returns false if name is not a command line flag. 34098675Sdes static bool wasSetOnCmdline(const char* name, bool* value); 34198675Sdes static void printSetFlags(outputStream* out); 34298675Sdes 34398675Sdes static void printFlags(outputStream* out, bool withComments); 34498675Sdes 345197679Sdes static void verify() PRODUCT_RETURN; 34698675Sdes}; 347197679Sdes 34898675Sdes// use this for flags that are true by default in the debug version but 34998675Sdes// false in the optimized version, and vice versa 35098675Sdes#ifdef ASSERT 35198675Sdes#define trueInDebug true 35298675Sdes#define falseInDebug false 35398675Sdes#else 35498675Sdes#define trueInDebug false 35598675Sdes#define falseInDebug true 35698675Sdes#endif 35798675Sdes 358197679Sdes// use this for flags that are true per default in the product build 35998675Sdes// but false in development builds, and vice versa 360197679Sdes#ifdef PRODUCT 36198675Sdes#define trueInProduct true 36298675Sdes#define falseInProduct false 36398675Sdes#else 36498675Sdes#define trueInProduct false 36598675Sdes#define falseInProduct true 36698675Sdes#endif 36798675Sdes 36898675Sdes#ifdef JAVASE_EMBEDDED 36998675Sdes#define falseInEmbedded false 37098675Sdes#else 371197679Sdes#define falseInEmbedded true 37298675Sdes#endif 373197679Sdes 37498675Sdes// develop flags are settable / visible only during development and are constant in the PRODUCT version 37598675Sdes// product flags are always settable / visible 37698675Sdes// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 377162852Sdes 37898675Sdes// A flag must be declared with one of the following types: 37998675Sdes// bool, intx, uintx, ccstr. 38098675Sdes// The type "ccstr" is an alias for "const char*" and is used 38198675Sdes// only in this file, because the macrology requires single-token type names. 38298675Sdes 38398675Sdes// Note: Diagnostic options not meant for VM tuning or for product modes. 384197679Sdes// They are to be used for VM quality assurance or field diagnosis 38598675Sdes// of VM bugs. They are hidden so that users will not be encouraged to 386197679Sdes// try them as if they were VM ordinary execution options. However, they 38798675Sdes// are available in the product version of the VM. Under instruction 38898675Sdes// from support engineers, VM customers can turn them on to collect 38998675Sdes// diagnostic information about VM problems. To use a VM diagnostic 390162852Sdes// option, you must first specify +UnlockDiagnosticVMOptions. 39198675Sdes// (This master switch also affects the behavior of -Xprintflags.) 392124208Sdes// 39398675Sdes// experimental flags are in support of features that are not 394197679Sdes// part of the officially supported product, but are available 39598675Sdes// for experimenting with. They could, for example, be performance 39698675Sdes// features that may not have undergone full or rigorous QA, but which may 397124208Sdes// help performance in some cases and released for experimentation 398221420Sdes// by the community of users and developers. This flag also allows one to 399221420Sdes// be able to build a fully supported product that nonetheless also 400124208Sdes// ships with some unsupported, lightly tested, experimental features. 401124208Sdes// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 40298675Sdes// UnlockExperimentalVMOptions flag, which allows the control and 403197679Sdes// modification of the experimental flags. 404197679Sdes// 405181111Sdes// Nota bene: neither diagnostic nor experimental options should be used casually, 406181111Sdes// and they are not supported on production loads, except under explicit 407181111Sdes// direction from support engineers. 408181111Sdes// 409181111Sdes// manageable flags are writeable external product flags. 410181111Sdes// They are dynamically writeable through the JDK management interface 411181111Sdes// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 412181111Sdes// These flags are external exported interface (see CCC). The list of 41398675Sdes// manageable flags can be queried programmatically through the management 41498675Sdes// interface. 41598675Sdes// 416181111Sdes// A flag can be made as "manageable" only if 417181111Sdes// - the flag is defined in a CCC as an external exported interface. 41898675Sdes// - the VM implementation supports dynamic setting of the flag. 419124208Sdes// This implies that the VM must *always* query the flag variable 420124208Sdes// and not reuse state related to the flag state at any given time. 421197679Sdes// - you want the flag to be queried programmatically by the customers. 422197679Sdes// 423124208Sdes// product_rw flags are writeable internal product flags. 424124208Sdes// They are like "manageable" flags but for internal/private use. 425124208Sdes// The list of product_rw flags are internal/private flags which 426181111Sdes// may be changed/removed in a future release. It can be set 42798675Sdes// through the management interface to get/set value 42898675Sdes// when the name of flag is supplied. 429226046Sdes// 430226046Sdes// A flag can be made as "product_rw" only if 43157429Smarkm// - the VM implementation supports dynamic setting of the flag. 43257429Smarkm// This implies that the VM must *always* query the flag variable 43357429Smarkm// and not reuse state related to the flag state at any given time. 43457429Smarkm// 43557429Smarkm// Note that when there is a need to support develop flags to be writeable, 436197679Sdes// it can be done in the same way as product_rw. 437197679Sdes 43857429Smarkm#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 43998937Sdes \ 440126274Sdes lp64_product(bool, UseCompressedOops, false, \ 44198937Sdes "Use 32-bit object references in 64-bit VM " \ 442226046Sdes "lp64_product means flag is always constant in 32 bit VM") \ 44398937Sdes \ 444226046Sdes lp64_product(bool, UseCompressedKlassPointers, false, \ 44557429Smarkm "Use 32-bit klass pointers in 64-bit VM " \ 44657429Smarkm "lp64_product means flag is always constant in 32 bit VM") \ 44757429Smarkm \ 44857429Smarkm notproduct(bool, CheckCompressedOops, true, \ 44957429Smarkm "generate checks in encoding/decoding code in debug VM") \ 45092555Sdes \ 45157429Smarkm product_pd(uintx, HeapBaseMinAddress, \ 45257429Smarkm "OS specific low limit for heap base address") \ 453197679Sdes \ 45457429Smarkm diagnostic(bool, PrintCompressedOopsMode, false, \ 455197679Sdes "Print compressed oops base address and encoding mode") \ 456197679Sdes \ 45757429Smarkm lp64_product(intx, ObjectAlignmentInBytes, 8, \ 45857429Smarkm "Default object alignment in bytes, 8 is minimum") \ 45957429Smarkm \ 46057429Smarkm /* UseMembar is theoretically a temp flag used for memory barrier \ 46157429Smarkm * removal testing. It was supposed to be removed before FCS but has \ 46292555Sdes * been re-added (see 6401008) */ \ 46357429Smarkm product_pd(bool, UseMembar, \ 464197679Sdes "(Unstable) Issues membars on thread state transitions") \ 46557429Smarkm \ 46657429Smarkm /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 46757429Smarkm * that don't support it. This will be replaced by processor detection \ 46857429Smarkm * logic. \ 46957429Smarkm */ \ 47092555Sdes product(bool, UsePPCLWSYNC, true, \ 47157429Smarkm "Use lwsync instruction if true, else use slower sync") \ 472197679Sdes \ 47357429Smarkm develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 47457429Smarkm "Whether to clean the chunk pool asynchronously") \ 47557429Smarkm \ 47657429Smarkm /* Temporary: See 6948537 */ \ 47757429Smarkm experimental(bool, UseMemSetInBOT, true, \ 47892555Sdes "(Unstable) uses memset in BOT updates in GC code") \ 47957429Smarkm \ 480197679Sdes diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 48157429Smarkm "Enable normal processing of flags relating to field diagnostics")\ 482197679Sdes \ 483197679Sdes experimental(bool, UnlockExperimentalVMOptions, false, \ 484197679Sdes "Enable normal processing of flags relating to experimental features")\ 485197679Sdes \ 48657429Smarkm product(bool, JavaMonitorsInStackTrace, true, \ 487197679Sdes "Print info. about Java monitor locks when the stacks are dumped")\ 488197679Sdes \ 48957429Smarkm product_pd(bool, UseLargePages, \ 490197679Sdes "Use large page memory") \ 491197679Sdes \ 492197679Sdes product_pd(bool, UseLargePagesIndividualAllocation, \ 493197679Sdes "Allocate large pages individually for better affinity") \ 494197679Sdes \ 495197679Sdes develop(bool, LargePagesIndividualAllocationInjectError, false, \ 49657429Smarkm "Fail large pages individual allocation") \ 49757429Smarkm \ 498197679Sdes develop(bool, TracePageSizes, false, \ 499197679Sdes "Trace page size selection and usage.") \ 50057429Smarkm \ 50157429Smarkm product(bool, UseNUMA, false, \ 50257429Smarkm "Use NUMA if available") \ 50357429Smarkm \ 50457429Smarkm product(bool, UseNUMAInterleaving, false, \ 50576259Sgreen "Interleave memory across NUMA nodes if available") \ 50657429Smarkm \ 507197679Sdes product(uintx, NUMAInterleaveGranularity, 2*M, \ 50857429Smarkm "Granularity to use for NUMA interleaving on Windows OS") \ 50957429Smarkm \ 51057429Smarkm product(bool, ForceNUMA, false, \ 51157429Smarkm "Force NUMA optimizations on single-node/UMA systems") \ 51276259Sgreen \ 51392555Sdes product(intx, NUMAChunkResizeWeight, 20, \ 51457429Smarkm "Percentage (0-100) used to weight the current sample when " \ 515197679Sdes "computing exponentially decaying average for " \ 51657429Smarkm "AdaptiveNUMAChunkSizing") \ 51757429Smarkm \ 51857429Smarkm product(intx, NUMASpaceResizeRate, 1*G, \ 51957429Smarkm "Do not reallocate more that this amount per collection") \ 52057429Smarkm \ 52157429Smarkm product(bool, UseAdaptiveNUMAChunkSizing, true, \ 52257429Smarkm "Enable adaptive chunk sizing for NUMA") \ 52392555Sdes \ 52492555Sdes product(bool, NUMAStats, false, \ 52576259Sgreen "Print NUMA stats in detailed heap information") \ 526197679Sdes \ 52776259Sgreen product(intx, NUMAPageScanRate, 256, \ 528197679Sdes "Maximum number of pages to include in the page scan procedure") \ 529197679Sdes \ 53076259Sgreen product_pd(bool, NeedsDeoptSuspend, \ 53176259Sgreen "True for register window machines (sparc/ia64)") \ 53276259Sgreen \ 53357429Smarkm product(intx, UseSSE, 99, \ 53457429Smarkm "Highest supported SSE instructions set on x86/x64") \ 535197679Sdes \ 53657429Smarkm product(uintx, LargePageSizeInBytes, 0, \ 537197679Sdes "Large page size (0 to let VM choose the page size") \ 53876259Sgreen \ 53976259Sgreen product(uintx, LargePageHeapSizeThreshold, 128*M, \ 54076259Sgreen "Use large pages if max heap is at least this big") \ 54157429Smarkm \ 54257429Smarkm product(bool, ForceTimeHighResolution, false, \ 54357429Smarkm "Using high time resolution(For Win32 only)") \ 54457429Smarkm \ 54557429Smarkm develop(bool, TraceItables, false, \ 54657429Smarkm "Trace initialization and use of itables") \ 54757429Smarkm \ 54898675Sdes develop(bool, TracePcPatching, false, \ 54957429Smarkm "Trace usage of frame::patch_pc") \ 550221420Sdes \ 55157429Smarkm develop(bool, TraceJumps, false, \ 55269587Sgreen "Trace assembly jumps in thread ring buffer") \ 553106121Sdes \ 55469587Sgreen develop(bool, TraceRelocator, false, \ 55569587Sgreen "Trace the bytecode relocator") \ 55660573Skris \ 55769587Sgreen develop(bool, TraceLongCompiles, false, \ 55898675Sdes "Print out every time compilation is longer than " \ 55998675Sdes "a given threashold") \ 560197679Sdes \ 561197679Sdes develop(bool, SafepointALot, false, \ 562197679Sdes "Generates a lot of safepoints. Works with " \ 563197679Sdes "GuaranteedSafepointInterval") \ 564197679Sdes \ 565197679Sdes product_pd(bool, BackgroundCompilation, \ 56657429Smarkm "A thread requesting compilation is not blocked during " \ 56757429Smarkm "compilation") \ 56898675Sdes \ 56998675Sdes product(bool, PrintVMQWaitTime, false, \ 57098675Sdes "Prints out the waiting time in VM operation queue") \ 57198675Sdes \ 572197679Sdes develop(bool, NoYieldsInMicrolock, false, \ 573197679Sdes "Disable yields in microlock") \ 574197679Sdes \ 57598675Sdes develop(bool, TraceOopMapGeneration, false, \ 57698675Sdes "Shows oopmap generation") \ 57792555Sdes \ 57857429Smarkm product(bool, MethodFlushing, true, \ 57992555Sdes "Reclamation of zombie and not-entrant methods") \ 58057429Smarkm \ 58192555Sdes develop(bool, VerifyStack, false, \ 58292555Sdes "Verify stack of each thread when it is entering a runtime call") \ 58357429Smarkm \ 58492555Sdes diagnostic(bool, ForceUnreachable, false, \ 58592555Sdes "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 58692555Sdes \ 58792555Sdes notproduct(bool, StressDerivedPointers, false, \ 588197679Sdes "Force scavenge when a derived pointers is detected on stack " \ 589197679Sdes "after rtm call") \ 59057429Smarkm \ 59157429Smarkm develop(bool, TraceDerivedPointers, false, \ 59292555Sdes "Trace traversal of derived pointers on stack") \ 59360573Skris \ 59457429Smarkm notproduct(bool, TraceCodeBlobStacks, false, \ 59557429Smarkm "Trace stack-walk of codeblobs") \ 59657429Smarkm \ 597106121Sdes product(bool, PrintJNIResolving, false, \ 598197679Sdes "Used to implement -v:jni") \ 59957429Smarkm \ 600162852Sdes notproduct(bool, PrintRewrites, false, \ 60157429Smarkm "Print methods that are being rewritten") \ 60276259Sgreen \ 60357429Smarkm product(bool, UseInlineCaches, true, \ 604197679Sdes "Use Inline Caches for virtual calls ") \ 60557429Smarkm \ 606162852Sdes develop(bool, InlineArrayCopy, true, \ 60757429Smarkm "inline arraycopy native that is known to be part of " \ 608197679Sdes "base library DLL") \ 609197679Sdes \ 610197679Sdes develop(bool, InlineObjectHash, true, \ 611197679Sdes "inline Object::hashCode() native that is known to be part " \ 612197679Sdes "of base library DLL") \ 613197679Sdes \ 61492555Sdes develop(bool, InlineNatives, true, \ 61557429Smarkm "inline natives that are known to be part of base library DLL") \ 616197679Sdes \ 61757429Smarkm develop(bool, InlineMathNatives, true, \ 618162852Sdes "inline SinD, CosD, etc.") \ 61960573Skris \ 62060573Skris develop(bool, InlineClassNatives, true, \ 62160573Skris "inline Class.isInstance, etc") \ 622197679Sdes \ 62360573Skris develop(bool, InlineThreadNatives, true, \ 624162852Sdes "inline Thread.currentThread, etc") \ 62560573Skris \ 62692555Sdes develop(bool, InlineUnsafeOps, true, \ 62760573Skris "inline memory ops (native methods) from sun.misc.Unsafe") \ 628197679Sdes \ 62960573Skris product(bool, CriticalJNINatives, true, \ 630162852Sdes "check for critical JNI entry points") \ 63157429Smarkm \ 63257429Smarkm notproduct(bool, StressCriticalJNINatives, false, \ 63357429Smarkm "Exercise register saving code in critical natives") \ 634197679Sdes \ 63557429Smarkm product(bool, UseSSE42Intrinsics, false, \ 636162852Sdes "SSE4.2 versions of intrinsics") \ 63760573Skris \ 63860573Skris develop(bool, TraceCallFixup, false, \ 63960573Skris "traces all call fixups") \ 640197679Sdes \ 64160573Skris develop(bool, DeoptimizeALot, false, \ 64257429Smarkm "deoptimize at every exit from the runtime system") \ 643221420Sdes \ 644221420Sdes notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 645221420Sdes "a comma separated list of bcis to deoptimize at") \ 646221420Sdes \ 647221420Sdes product(bool, DeoptimizeRandom, false, \ 648221420Sdes "deoptimize random frames on random exit from the runtime system")\ 649221420Sdes \ 650221420Sdes notproduct(bool, ZombieALot, false, \ 65157429Smarkm "creates zombies (non-entrant) at exit from the runt. system") \ 65257429Smarkm \ 65357429Smarkm product(bool, UnlinkSymbolsALot, false, \ 65457429Smarkm "unlink unreferenced symbols from the symbol table at safepoints")\ 65557429Smarkm \ 65692555Sdes notproduct(bool, WalkStackALot, false, \ 65776259Sgreen "trace stack (no print) at every exit from the runtime system") \ 65857429Smarkm \ 65992555Sdes product(bool, Debugging, false, \ 66057429Smarkm "set when executing debug methods in debug.ccp " \ 66176259Sgreen "(to prevent triggering assertions)") \ 662137015Sdes \ 66357429Smarkm notproduct(bool, StrictSafepointChecks, trueInDebug, \ 66457429Smarkm "Enable strict checks that safepoints cannot happen for threads " \ 66557429Smarkm "that used No_Safepoint_Verifier") \ 66657429Smarkm \ 66757429Smarkm notproduct(bool, VerifyLastFrame, false, \ 668197679Sdes "Verify oops on last frame on entry to VM") \ 669197679Sdes \ 67057429Smarkm develop(bool, TraceHandleAllocation, false, \ 671197679Sdes "Prints out warnings when suspicious many handles are allocated") \ 67257429Smarkm \ 673197679Sdes product(bool, UseCompilerSafepoints, true, \ 674197679Sdes "Stop at safepoints in compiled code") \ 675197679Sdes \ 676197679Sdes product(bool, UseSplitVerifier, true, \ 677197679Sdes "use split verifier with StackMapTable attributes") \ 678197679Sdes \ 679197679Sdes product(bool, FailOverToOldVerifier, true, \ 680197679Sdes "fail over to old verifier when split verifier fails") \ 68157429Smarkm \ 68257429Smarkm develop(bool, ShowSafepointMsgs, false, \ 683197679Sdes "Show msg. about safepoint synch.") \ 68457429Smarkm \ 68560573Skris product(bool, SafepointTimeout, false, \ 68657429Smarkm "Time out and warn or fail after SafepointTimeoutDelay " \ 687197679Sdes "milliseconds if failed to reach safepoint") \ 688197679Sdes \ 68957429Smarkm develop(bool, DieOnSafepointTimeout, false, \ 69057429Smarkm "Die upon failure to reach safepoint (see SafepointTimeout)") \ 691137015Sdes \ 692137015Sdes /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 693137015Sdes /* typically, at most a few retries are needed */ \ 69457429Smarkm product(intx, SuspendRetryCount, 50, \ 69557429Smarkm "Maximum retry count for an external suspend request") \ 696197679Sdes \ 69757429Smarkm product(intx, SuspendRetryDelay, 5, \ 69857429Smarkm "Milliseconds to delay per retry (* current_retry_count)") \ 699197679Sdes \ 700197679Sdes product(bool, AssertOnSuspendWaitFailure, false, \ 701162852Sdes "Assert/Guarantee on external suspend wait failure") \ 702197679Sdes \ 70357429Smarkm product(bool, TraceSuspendWaitFailures, false, \ 70457429Smarkm "Trace external suspend wait failures") \ 70557429Smarkm \ 706197679Sdes product(bool, MaxFDLimit, true, \ 70757429Smarkm "Bump the number of file descriptors to max in solaris.") \ 70857429Smarkm \ 70957429Smarkm diagnostic(bool, LogEvents, true, \ 710162852Sdes "Enable the various ring buffer event logs") \ 711197679Sdes \ 712197679Sdes diagnostic(intx, LogEventsBufferEntries, 10, \ 713197679Sdes "Enable the various ring buffer event logs") \ 714197679Sdes \ 715197679Sdes product(bool, BytecodeVerificationRemote, true, \ 716248619Sdes "Enables the Java bytecode verifier for remote classes") \ 71757429Smarkm \ 71857429Smarkm product(bool, BytecodeVerificationLocal, false, \ 71957429Smarkm "Enables the Java bytecode verifier for local classes") \ 720197679Sdes \ 72157429Smarkm develop(bool, ForceFloatExceptions, trueInDebug, \ 722197679Sdes "Force exceptions on FP stack under/overflow") \ 723197679Sdes \ 724197679Sdes develop(bool, VerifyStackAtCalls, false, \ 725197679Sdes "Verify that the stack pointer is unchanged after calls") \ 72657429Smarkm \ 72757429Smarkm develop(bool, TraceJavaAssertions, false, \ 728157016Sdes "Trace java language assertions") \ 72957429Smarkm \ 73057429Smarkm notproduct(bool, CheckAssertionStatusDirectives, false, \ 73157429Smarkm "temporary - see javaClasses.cpp") \ 73257429Smarkm \ 73357429Smarkm notproduct(bool, PrintMallocFree, false, \ 73498675Sdes "Trace calls to C heap malloc/free allocation") \ 73576259Sgreen \ 73676259Sgreen product(bool, PrintOopAddress, false, \ 73776259Sgreen "Always print the location of the oop") \ 73876259Sgreen \ 73976259Sgreen notproduct(bool, VerifyCodeCacheOften, false, \ 74076259Sgreen "Verify compiled-code cache often") \ 741124208Sdes \ 742137015Sdes develop(bool, ZapDeadCompiledLocals, false, \ 74376259Sgreen "Zap dead locals in compiler frames") \ 744113908Sdes \ 74576259Sgreen notproduct(bool, ZapDeadLocalsOld, false, \ 74692555Sdes "Zap dead locals (old version, zaps all frames when " \ 747197679Sdes "entering the VM") \ 748137015Sdes \ 749197679Sdes notproduct(bool, CheckOopishValues, false, \ 750197679Sdes "Warn if value contains oop ( requires ZapDeadLocals)") \ 75192555Sdes \ 752197679Sdes develop(bool, UseMallocOnly, false, \ 753137015Sdes "use only malloc/free for allocation (no resource area/arena)") \ 754197679Sdes \ 755197679Sdes develop(bool, PrintMalloc, false, \ 75692555Sdes "print all malloc/free calls") \ 757197679Sdes \ 758113908Sdes develop(bool, PrintMallocStatistics, false, \ 75992555Sdes "print malloc/free statistics") \ 760197679Sdes \ 761197679Sdes develop(bool, ZapResourceArea, trueInDebug, \ 762197679Sdes "Zap freed resource/arena space with 0xABABABAB") \ 763181111Sdes \ 764248619Sdes notproduct(bool, ZapVMHandleArea, trueInDebug, \ 765248619Sdes "Zap freed VM handle space with 0xBCBCBCBC") \ 766248619Sdes \ 76776259Sgreen develop(bool, ZapJNIHandleArea, trueInDebug, \ 76876259Sgreen "Zap freed JNI handle space with 0xFEFEFEFE") \ 76976259Sgreen \ 77076259Sgreen notproduct(bool, ZapStackSegments, trueInDebug, \ 77176259Sgreen "Zap allocated/freed Stack segments with 0xFADFADED") \ 77276259Sgreen \ 773197679Sdes develop(bool, ZapUnusedHeapArea, trueInDebug, \ 77476259Sgreen "Zap unused heap space with 0xBAADBABE") \ 775197679Sdes \ 776197679Sdes develop(bool, TraceZapUnusedHeapArea, false, \ 77776259Sgreen "Trace zapping of unused heap space") \ 778197679Sdes \ 779197679Sdes develop(bool, CheckZapUnusedHeapArea, false, \ 780197679Sdes "Check zapping of unused heap space") \ 781248619Sdes \ 78276259Sgreen develop(bool, ZapFillerObjects, trueInDebug, \ 78376259Sgreen "Zap filler objects with 0xDEAFBABE") \ 78492555Sdes \ 785248619Sdes develop(bool, PrintVMMessages, true, \ 78698675Sdes "Print vm messages on console") \ 78798675Sdes \ 788181111Sdes product(bool, PrintGCApplicationConcurrentTime, false, \ 789181111Sdes "Print the time the application has been running") \ 790149749Sdes \ 791197679Sdes product(bool, PrintGCApplicationStoppedTime, false, \ 792197679Sdes "Print the time the application has been stopped") \ 79376259Sgreen \ 79476259Sgreen diagnostic(bool, VerboseVerification, false, \ 79576259Sgreen "Display detailed verification details") \ 79676259Sgreen \ 79776259Sgreen notproduct(uintx, ErrorHandlerTest, 0, \ 79876259Sgreen "If > 0, provokes an error after VM initialization; the value" \ 79976259Sgreen "determines which error to provoke. See test_error_handler()" \ 800124208Sdes "in debug.cpp.") \ 801124208Sdes \ 802124208Sdes develop(bool, Verbose, false, \ 803124208Sdes "Prints additional debugging information from other modes") \ 804124208Sdes \ 805124208Sdes develop(bool, PrintMiscellaneous, false, \ 806124208Sdes "Prints uncategorized debugging information (requires +Verbose)") \ 807124208Sdes \ 808197679Sdes develop(bool, WizardMode, false, \ 809197679Sdes "Prints much more debugging information") \ 810197679Sdes \ 81176259Sgreen product(bool, ShowMessageBoxOnError, false, \ 81276259Sgreen "Keep process alive on VM fatal error") \ 81357429Smarkm \ 814149749Sdes product(bool, CreateMinidumpOnCrash, false, \ 815162852Sdes "Create minidump on VM fatal error") \ 816149749Sdes \ 817149749Sdes product_pd(bool, UseOSErrorReporting, \ 818149749Sdes "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 819149749Sdes \ 820149749Sdes product(bool, SuppressFatalErrorMessage, false, \ 821149749Sdes "Do NO Fatal Error report [Avoid deadlock]") \ 822149749Sdes \ 823149749Sdes product(ccstrlist, OnError, "", \ 824149749Sdes "Run user-defined commands on fatal error; see VMError.cpp " \ 825149749Sdes "for examples") \ 826149749Sdes \ 827149749Sdes product(ccstrlist, OnOutOfMemoryError, "", \ 828197679Sdes "Run user-defined commands on first java.lang.OutOfMemoryError") \ 829149749Sdes \ 830162852Sdes manageable(bool, HeapDumpBeforeFullGC, false, \ 831197679Sdes "Dump heap to file before any major stop-world GC") \ 832162852Sdes \ 833197679Sdes manageable(bool, HeapDumpAfterFullGC, false, \ 834149749Sdes "Dump heap to file after any major stop-world GC") \ 835149749Sdes \ 836149749Sdes manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 837149749Sdes "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 838149749Sdes \ 839149749Sdes manageable(ccstr, HeapDumpPath, NULL, \ 840149749Sdes "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 841149749Sdes "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 842149749Sdes "in the working directory)") \ 843149749Sdes \ 844149749Sdes develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 845149749Sdes "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 84660573Skris "when the heap usage is larger than this") \ 84760573Skris \ 84892555Sdes develop(uintx, HeapDumpSegmentSize, 1*G, \ 849124208Sdes "Approximate segment size when generating a segmented heap dump") \ 85060573Skris \ 85192555Sdes develop(bool, BreakAtWarning, false, \ 852248619Sdes "Execute breakpoint upon encountering VM warning") \ 853248619Sdes \ 854137015Sdes product_pd(bool, UseVectoredExceptions, \ 85560573Skris "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 85660573Skris \ 85760573Skris develop(bool, TraceVMOperation, false, \ 85860573Skris "Trace vm operations") \ 85960573Skris \ 860197679Sdes develop(bool, UseFakeTimers, false, \ 861197679Sdes "Tells whether the VM should use system time or a fake timer") \ 862197679Sdes \ 863197679Sdes product(ccstr, NativeMemoryTracking, "off", \ 864248619Sdes "Native memory tracking options") \ 865248619Sdes \ 866248619Sdes diagnostic(bool, PrintNMTStatistics, false, \ 86760573Skris "Print native memory tracking summary data if it is on") \ 86892555Sdes \ 869248619Sdes diagnostic(bool, LogCompilation, false, \ 87060573Skris "Log compilation activity in detail to hotspot.log or LogFile") \ 871197679Sdes \ 87292555Sdes product(bool, PrintCompilation, false, \ 87360573Skris "Print compilations") \ 87460573Skris \ 87560573Skris diagnostic(bool, TraceNMethodInstalls, false, \ 876197679Sdes "Trace nmethod intallation") \ 87760573Skris \ 87860573Skris diagnostic(intx, ScavengeRootsInCode, 2, \ 87960573Skris "0: do not allow scavengable oops in the code cache; " \ 880197679Sdes "1: allow scavenging from the code cache; " \ 88160573Skris "2: emit as many constants as the compiler can see") \ 882197679Sdes \ 883197679Sdes product(bool, AlwaysRestoreFPU, false, \ 884197679Sdes "Restore the FPU control word after every JNI call (expensive)") \ 885197679Sdes \ 886197679Sdes diagnostic(bool, PrintCompilation2, false, \ 887197679Sdes "Print additional statistics per compilation") \ 888197679Sdes \ 889197679Sdes diagnostic(bool, PrintAdapterHandlers, false, \ 890197679Sdes "Print code generated for i2c/c2i adapters") \ 89160573Skris \ 892197679Sdes diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 89360573Skris "Verify that i2c/c2i adapters are called properly") \ 89460573Skris \ 89560573Skris develop(bool, VerifyAdapterSharing, false, \ 896197679Sdes "Verify that the code for shared adapters is the equivalent") \ 89760573Skris \ 89860573Skris diagnostic(bool, PrintAssembly, false, \ 89960573Skris "Print assembly code (using external disassembler.so)") \ 90060573Skris \ 90160573Skris diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 902248619Sdes "Options string passed to disassembler.so") \ 90360573Skris \ 90460573Skris diagnostic(bool, PrintNMethods, false, \ 90560573Skris "Print assembly code for nmethods when generated") \ 906197679Sdes \ 90792555Sdes diagnostic(bool, PrintNativeNMethods, false, \ 908197679Sdes "Print assembly code for native nmethods when generated") \ 909197679Sdes \ 910197679Sdes develop(bool, PrintDebugInfo, false, \ 911197679Sdes "Print debug information for all nmethods when generated") \ 91298675Sdes \ 913197679Sdes develop(bool, PrintRelocations, false, \ 91492555Sdes "Print relocation information for all nmethods when generated") \ 915197679Sdes \ 91692555Sdes develop(bool, PrintDependencies, false, \ 917197679Sdes "Print dependency information for all nmethods when generated") \ 918197679Sdes \ 91960573Skris develop(bool, PrintExceptionHandlers, false, \ 92060573Skris "Print exception handler tables for all nmethods when generated") \ 92160573Skris \ 922137015Sdes develop(bool, InterceptOSException, false, \ 923137015Sdes "Starts debugger when an implicit OS (e.g., NULL) " \ 924137015Sdes "exception happens") \ 92560573Skris \ 92660573Skris notproduct(bool, PrintCodeCache, false, \ 92760573Skris "Print the compiled_code cache when exiting") \ 92860573Skris \ 92960573Skris develop(bool, PrintCodeCache2, false, \ 930248619Sdes "Print detailed info on the compiled_code cache when exiting") \ 931248619Sdes \ 932248619Sdes diagnostic(bool, PrintStubCode, false, \ 93360573Skris "Print generated stub code") \ 934248619Sdes \ 93592555Sdes product(bool, StackTraceInThrowable, true, \ 936248619Sdes "Collect backtrace in throwable when exception happens") \ 937248619Sdes \ 93860573Skris product(bool, OmitStackTraceInFastThrow, true, \ 93960573Skris "Omit backtraces for some 'hot' exceptions in optimized code") \ 940248619Sdes \ 941197679Sdes product(bool, ProfilerPrintByteCodeStatistics, false, \ 942248619Sdes "Prints byte code statictics when dumping profiler output") \ 943197679Sdes \ 94460573Skris product(bool, ProfilerRecordPC, false, \ 94560573Skris "Collects tick for each 16 byte interval of compiled code") \ 946248619Sdes \ 947197679Sdes product(bool, ProfileVM, false, \ 948197679Sdes "Profiles ticks that fall within VM (either in the VM Thread " \ 949248619Sdes "or VM code called through stubs)") \ 95060573Skris \ 951248619Sdes product(bool, ProfileIntervals, false, \ 952248619Sdes "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 953248619Sdes \ 954248619Sdes notproduct(bool, ProfilerCheckIntervals, false, \ 955248619Sdes "Collect and print info on spacing of profiler ticks") \ 956248619Sdes \ 957248619Sdes develop(bool, PrintJVMWarnings, false, \ 958248619Sdes "Prints warnings for unimplemented JVM functions") \ 959197679Sdes \ 960248619Sdes product(bool, PrintWarnings, true, \ 96160573Skris "Prints JVM warnings to output stream") \ 96260573Skris \ 963197679Sdes notproduct(uintx, WarnOnStalledSpinLock, 0, \ 96460573Skris "Prints warnings for stalled SpinLocks") \ 96560573Skris \ 966197679Sdes develop(bool, InitializeJavaLangSystem, true, \ 967124208Sdes "Initialize java.lang.System - turn off for individual " \ 968197679Sdes "method debugging") \ 969124208Sdes \ 970124208Sdes develop(bool, InitializeJavaLangString, true, \ 971248619Sdes "Initialize java.lang.String - turn off for individual " \ 972248619Sdes "method debugging") \ 973197679Sdes \ 97460573Skris develop(bool, InitializeJavaLangExceptionsErrors, true, \ 97576259Sgreen "Initialize various error and exception classes - turn off for " \ 97676259Sgreen "individual method debugging") \ 977197679Sdes \ 978149749Sdes product(bool, RegisterFinalizersAtInit, true, \ 97960573Skris "Register finalizable objects at end of Object.<init> or " \ 98060573Skris "after allocation") \ 981124208Sdes \ 982124208Sdes develop(bool, RegisterReferences, true, \ 983124208Sdes "Tells whether the VM should register soft/weak/final/phantom " \ 984124208Sdes "references") \ 985124208Sdes \ 986124208Sdes develop(bool, IgnoreRewrites, false, \ 987197679Sdes "Supress rewrites of bytecodes in the oopmap generator. " \ 988124208Sdes "This is unsafe!") \ 989124208Sdes \ 990124208Sdes develop(bool, PrintCodeCacheExtension, false, \ 991197679Sdes "Print extension of code cache") \ 992240075Sdes \ 993240075Sdes develop(bool, UsePrivilegedStack, true, \ 994240075Sdes "Enable the security JVM functions") \ 995240075Sdes \ 996124208Sdes develop(bool, ProtectionDomainVerification, true, \ 997124208Sdes "Verifies protection domain before resolution in system " \ 998124208Sdes "dictionary") \ 999197679Sdes \ 1000197679Sdes product(bool, ClassUnloading, true, \ 1001197679Sdes "Do unloading of classes") \ 1002197679Sdes \ 1003124208Sdes diagnostic(bool, LinkWellKnownClasses, false, \ 1004124208Sdes "Resolve a well known class as soon as its name is seen") \ 1005124208Sdes \ 1006124208Sdes develop(bool, DisableStartThread, false, \ 1007124208Sdes "Disable starting of additional Java threads " \ 1008124208Sdes "(for debugging only)") \ 1009197679Sdes \ 1010124208Sdes develop(bool, MemProfiling, false, \ 1011124208Sdes "Write memory usage profiling to log file") \ 1012124208Sdes \ 1013124208Sdes notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1014124208Sdes "Prints the system dictionary at exit") \ 1015197679Sdes \ 1016197679Sdes experimental(intx, PredictedLoadedClassCount, 0, \ 1017124208Sdes "Experimental: Tune loaded class cache starting size.") \ 1018124208Sdes \ 1019197679Sdes diagnostic(bool, UnsyncloadClass, false, \ 1020197679Sdes "Unstable: VM calls loadClass unsynchronized. Custom " \ 1021124208Sdes "class loader must call VM synchronized for findClass " \ 1022197679Sdes "and defineClass.") \ 1023124208Sdes \ 1024124208Sdes product(bool, AlwaysLockClassLoader, false, \ 1025124208Sdes "Require the VM to acquire the class loader lock before calling " \ 1026124208Sdes "loadClass() even for class loaders registering " \ 1027124208Sdes "as parallel capable") \ 1028124208Sdes \ 102960573Skris product(bool, AllowParallelDefineClass, false, \ 103092555Sdes "Allow parallel defineClass requests for class loaders " \ 103160573Skris "registering as parallel capable") \ 103292555Sdes \ 103360573Skris product(bool, MustCallLoadClassInternal, false, \ 103460573Skris "Call loadClassInternal() rather than loadClass()") \ 103560573Skris \ 103660573Skris product_pd(bool, DontYieldALot, \ 103760573Skris "Throw away obvious excess yield calls (for SOLARIS only)") \ 103860573Skris \ 103960573Skris product_pd(bool, ConvertSleepToYield, \ 104057429Smarkm "Converts sleep(0) to thread yield " \ 104157429Smarkm "(may be off for SOLARIS to improve GUI)") \ 104257429Smarkm \ 104357429Smarkm product(bool, ConvertYieldToSleep, false, \ 104457429Smarkm "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 104557429Smarkm "behavior (SOLARIS only)") \ 104692555Sdes \ 104757429Smarkm product(bool, UseBoundThreads, true, \ 1048197679Sdes "Bind user level threads to kernel threads (for SOLARIS only)") \ 104976259Sgreen \ 105057429Smarkm develop(bool, UseDetachedThreads, true, \ 1051181111Sdes "Use detached threads that are recycled upon termination " \ 1052181111Sdes "(for SOLARIS only)") \ 105360573Skris \ 105457429Smarkm product(bool, UseLWPSynchronization, true, \ 1055197679Sdes "Use LWP-based instead of libthread-based synchronization " \ 1056197679Sdes "(SPARC only)") \ 105776259Sgreen \ 105857429Smarkm product(ccstr, SyncKnobs, NULL, \ 105957429Smarkm "(Unstable) Various monitor synchronization tunables") \ 106057429Smarkm \ 106157429Smarkm product(intx, EmitSync, 0, \ 106257429Smarkm "(Unsafe,Unstable) " \ 106357429Smarkm " Controls emission of inline sync fast-path code") \ 106492555Sdes \ 106592555Sdes product(intx, MonitorBound, 0, "Bound Monitor population") \ 106660573Skris \ 106757429Smarkm product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 106857429Smarkm \ 106960573Skris product(intx, Atomics, 0, \ 107092555Sdes "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 107157429Smarkm \ 107276259Sgreen product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 107376259Sgreen \ 107457429Smarkm product(intx, SyncVerbose, 0, "(Unstable)" ) \ 107576259Sgreen \ 107657429Smarkm product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 107757429Smarkm \ 107857429Smarkm product(intx, hashCode, 0, \ 107957429Smarkm "(Unstable) select hashCode generation algorithm" ) \ 1080197679Sdes \ 1081197679Sdes product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1082197679Sdes "(Unstable, Linux-specific)" \ 108357429Smarkm " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 1084197679Sdes \ 1085197679Sdes product(bool, FilterSpuriousWakeups, true, \ 1086181111Sdes "Prevent spurious or premature wakeups from object.wait " \ 1087181111Sdes "(Solaris only)") \ 108857429Smarkm \ 1089181111Sdes product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1090197679Sdes product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1091181111Sdes product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1092181111Sdes \ 1093181111Sdes develop(bool, UsePthreads, false, \ 1094197679Sdes "Use pthread-based instead of libthread-based synchronization " \ 1095197679Sdes "(SPARC only)") \ 1096181111Sdes \ 1097197679Sdes product(bool, AdjustConcurrency, false, \ 1098181111Sdes "call thr_setconcurrency at thread create time to avoid " \ 1099181111Sdes "LWP starvation on MP systems (For Solaris Only)") \ 1100197679Sdes \ 1101181111Sdes product(bool, ReduceSignalUsage, false, \ 1102181111Sdes "Reduce the use of OS signals in Java and/or the VM") \ 1103181111Sdes \ 1104181111Sdes notproduct(bool, ValidateMarkSweep, false, \ 1105181111Sdes "Do extra validation during MarkSweep collection") \ 1106181111Sdes \ 1107181111Sdes notproduct(bool, RecordMarkSweepCompaction, false, \ 1108181111Sdes "Enable GC-to-GC recording and querying of compaction during " \ 1109181111Sdes "MarkSweep") \ 1110181111Sdes \ 1111181111Sdes develop_pd(bool, ShareVtableStubs, \ 1112181111Sdes "Share vtable stubs (smaller code but worse branch prediction") \ 111357429Smarkm \ 1114197679Sdes develop(bool, LoadLineNumberTables, true, \ 1115197679Sdes "Tells whether the class file parser loads line number tables") \ 1116197679Sdes \ 1117197679Sdes develop(bool, LoadLocalVariableTables, true, \ 1118197679Sdes "Tells whether the class file parser loads local variable tables")\ 111957429Smarkm \ 1120124208Sdes develop(bool, LoadLocalVariableTypeTables, true, \ 1121126274Sdes "Tells whether the class file parser loads local variable type tables")\ 112257429Smarkm \ 112357429Smarkm product(bool, AllowUserSignalHandlers, false, \ 112457429Smarkm "Do not complain if the application installs signal handlers " \ 112557429Smarkm "(Solaris & Linux only)") \ 112657429Smarkm \ 112757429Smarkm product(bool, UseSignalChaining, true, \ 112857429Smarkm "Use signal-chaining to invoke signal handlers installed " \ 112957429Smarkm "by the application (Solaris & Linux only)") \ 113057429Smarkm \ 113192555Sdes product(bool, UseAltSigs, false, \ 113292555Sdes "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 113392555Sdes "internal signals (Solaris only)") \ 113492555Sdes \ 113592555Sdes product(bool, AllowJNIEnvProxy, false, \ 113692555Sdes "Allow JNIEnv proxies for jdbx") \ 113757429Smarkm \ 113857429Smarkm product(bool, JNIDetachReleasesMonitors, true, \ 113957429Smarkm "JNI DetachCurrentThread releases monitors owned by thread") \ 114057429Smarkm \ 114157429Smarkm product(bool, RestoreMXCSROnJNICalls, false, \ 114257429Smarkm "Restore MXCSR when returning from JNI calls") \ 114392555Sdes \ 114457429Smarkm product(bool, CheckJNICalls, false, \ 114557429Smarkm "Verify all arguments to JNI calls") \ 114657429Smarkm \ 114792555Sdes product(bool, UseFastJNIAccessors, true, \ 114857429Smarkm "Use optimized versions of Get<Primitive>Field") \ 114957429Smarkm \ 115060573Skris product(bool, EagerXrunInit, false, \ 115157429Smarkm "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 115257429Smarkm " but not all -Xrun libraries may support the state of the VM at this time") \ 115357429Smarkm \ 115457429Smarkm product(bool, PreserveAllAnnotations, false, \ 115557429Smarkm "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 115657429Smarkm \ 115757429Smarkm develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 115857429Smarkm "Number of OutOfMemoryErrors preallocated with backtrace") \ 115957429Smarkm \ 116057429Smarkm product(bool, LazyBootClassLoader, true, \ 116157429Smarkm "Enable/disable lazy opening of boot class path entries") \ 116292555Sdes \ 116392555Sdes product(bool, UseXMMForArrayCopy, false, \ 116457429Smarkm "Use SSE2 MOVQ instruction for Arraycopy") \ 116576259Sgreen \ 116692555Sdes product(intx, FieldsAllocationStyle, 1, \ 116776259Sgreen "0 - type based with oops first, 1 - with oops last, " \ 116857429Smarkm "2 - oops in super and sub classes are together") \ 116957429Smarkm \ 1170197679Sdes product(bool, CompactFields, true, \ 117157429Smarkm "Allocate nonstatic fields in gaps between previous fields") \ 117257429Smarkm \ 1173197679Sdes notproduct(bool, PrintCompactFieldsSavings, false, \ 1174162852Sdes "Print how many words were saved with CompactFields") \ 117557429Smarkm \ 1176113908Sdes product(bool, UseBiasedLocking, true, \ 117757429Smarkm "Enable biased locking in JVM") \ 117857429Smarkm \ 117957429Smarkm product(intx, BiasedLockingStartupDelay, 4000, \ 1180197679Sdes "Number of milliseconds to wait before enabling biased locking") \ 118157429Smarkm \ 118257429Smarkm diagnostic(bool, PrintBiasedLockingStatistics, false, \ 118357429Smarkm "Print statistics of biased locking in JVM") \ 118457429Smarkm \ 118557429Smarkm product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1186197679Sdes "Threshold of number of revocations per type to try to " \ 118757429Smarkm "rebias all objects in the heap of that type") \ 118892555Sdes \ 118992555Sdes product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 119092555Sdes "Threshold of number of revocations per type to permanently " \ 119192555Sdes "revoke biases of all objects in the heap of that type") \ 119292555Sdes \ 1193197679Sdes product(intx, BiasedLockingDecayTime, 25000, \ 1194197679Sdes "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1195197679Sdes "type after previous bulk rebias") \ 1196162852Sdes \ 1197162852Sdes /* tracing */ \ 1198162852Sdes \ 1199162852Sdes notproduct(bool, TraceRuntimeCalls, false, \ 1200162852Sdes "Trace run-time calls") \ 1201162852Sdes \ 1202162852Sdes develop(bool, TraceJNICalls, false, \ 1203162852Sdes "Trace JNI calls") \ 120492555Sdes \ 120592555Sdes notproduct(bool, TraceJVMCalls, false, \ 1206197679Sdes "Trace JVM calls") \ 1207197679Sdes \ 1208197679Sdes product(ccstr, TraceJVMTI, NULL, \ 1209248619Sdes "Trace flags for JVMTI functions and events") \ 121092555Sdes \ 1211197679Sdes /* This option can change an EMCP method into an obsolete method. */ \ 121257429Smarkm /* This can affect tests that except specific methods to be EMCP. */ \ 121357429Smarkm /* This option should be used with caution. */ \ 121457429Smarkm product(bool, StressLdcRewrite, false, \ 1215197679Sdes "Force ldc -> ldc_w rewrite during RedefineClasses") \ 121657429Smarkm \ 121757429Smarkm product(intx, TraceRedefineClasses, 0, \ 121857429Smarkm "Trace level for JVMTI RedefineClasses") \ 1219197679Sdes \ 1220197679Sdes develop(bool, StressMethodComparator, false, \ 122157429Smarkm "run the MethodComparator on all loaded methods") \ 122257429Smarkm \ 1223197679Sdes /* change to false by default sometime after Mustang */ \ 122457429Smarkm product(bool, VerifyMergedCPBytecodes, true, \ 122557429Smarkm "Verify bytecodes after RedefineClasses constant pool merging") \ 1226197679Sdes \ 122792555Sdes develop(bool, TraceJNIHandleAllocation, false, \ 1228197679Sdes "Trace allocation/deallocation of JNI handle blocks") \ 122957429Smarkm \ 1230197679Sdes develop(bool, TraceThreadEvents, false, \ 1231162852Sdes "Trace all thread events") \ 123257429Smarkm \ 123357429Smarkm develop(bool, TraceBytecodes, false, \ 1234197679Sdes "Trace bytecode execution") \ 123557429Smarkm \ 1236197679Sdes develop(bool, TraceClassInitialization, false, \ 1237197679Sdes "Trace class initialization") \ 1238197679Sdes \ 1239197679Sdes develop(bool, TraceExceptions, false, \ 1240197679Sdes "Trace exceptions") \ 1241197679Sdes \ 1242197679Sdes develop(bool, TraceICs, false, \ 1243197679Sdes "Trace inline cache changes") \ 124457429Smarkm \ 1245197679Sdes notproduct(bool, TraceInvocationCounterOverflow, false, \ 1246197679Sdes "Trace method invocation counter overflow") \ 1247197679Sdes \ 1248146998Sdes develop(bool, TraceInlineCacheClearing, false, \ 1249146998Sdes "Trace clearing of inline caches in nmethods") \ 125092555Sdes \ 125160573Skris develop(bool, TraceDependencies, false, \ 125257429Smarkm "Trace dependencies") \ 125392555Sdes \ 125492555Sdes develop(bool, VerifyDependencies, trueInDebug, \ 125560573Skris "Exercise and verify the compilation dependency mechanism") \ 125676259Sgreen \ 1257248619Sdes develop(bool, TraceNewOopMapGeneration, false, \ 1258248619Sdes "Trace OopMapGeneration") \ 125960573Skris \ 126060573Skris develop(bool, TraceNewOopMapGenerationDetailed, false, \ 126160573Skris "Trace OopMapGeneration: print detailed cell states") \ 126257429Smarkm \ 1263197679Sdes develop(bool, TimeOopMap, false, \ 1264192595Sdes "Time calls to GenerateOopMap::compute_map() in sum") \ 1265192595Sdes \ 1266197679Sdes develop(bool, TimeOopMap2, false, \ 1267197679Sdes "Time calls to GenerateOopMap::compute_map() individually") \ 1268197679Sdes \ 1269197679Sdes develop(bool, TraceMonitorMismatch, false, \ 1270248619Sdes "Trace monitor matching failures during OopMapGeneration") \ 1271248619Sdes \ 1272248619Sdes develop(bool, TraceOopMapRewrites, false, \ 127357429Smarkm "Trace rewritting of method oops during oop map generation") \ 127460573Skris \ 127592555Sdes develop(bool, TraceSafepoint, false, \ 1276248619Sdes "Trace safepoint operations") \ 127760573Skris \ 1278248619Sdes develop(bool, TraceICBuffer, false, \ 1279248619Sdes "Trace usage of IC buffer") \ 1280248619Sdes \ 1281248619Sdes develop(bool, TraceCompiledIC, false, \ 1282248619Sdes "Trace changes of compiled IC") \ 1283248619Sdes \ 1284248619Sdes notproduct(bool, TraceZapDeadLocals, false, \ 1285248619Sdes "Trace zapping dead locals") \ 1286248619Sdes \ 1287248619Sdes develop(bool, TraceStartupTime, false, \ 1288248619Sdes "Trace setup time") \ 1289248619Sdes \ 1290248619Sdes develop(bool, TraceProtectionDomainVerification, false, \ 1291248619Sdes "Trace protection domain verifcation") \ 1292248619Sdes \ 129360573Skris develop(bool, TraceClearedExceptions, false, \ 129460573Skris "Prints when an exception is forcibly cleared") \ 129560573Skris \ 129660573Skris product(bool, TraceClassResolution, false, \ 1297197679Sdes "Trace all constant pool resolutions (for debugging)") \ 129860573Skris \ 1299197679Sdes product(bool, TraceBiasedLocking, false, \ 1300197679Sdes "Trace biased locking in JVM") \ 130160573Skris \ 1302197679Sdes product(bool, TraceMonitorInflation, false, \ 1303248619Sdes "Trace monitor inflation in JVM") \ 1304197679Sdes \ 1305240075Sdes /* gc */ \ 1306197679Sdes \ 1307197679Sdes product(bool, UseSerialGC, false, \ 1308197679Sdes "Use the serial garbage collector") \ 1309124208Sdes \ 1310197679Sdes product(bool, UseG1GC, false, \ 1311124208Sdes "Use the Garbage-First garbage collector") \ 1312197679Sdes \ 1313197679Sdes product(bool, UseParallelGC, false, \ 1314192595Sdes "Use the Parallel Scavenge garbage collector") \ 1315192595Sdes \ 131660573Skris product(bool, UseParallelOldGC, false, \ 1317197679Sdes "Use the Parallel Old garbage collector") \ 131860573Skris \ 1319248619Sdes product(uintx, HeapMaximumCompactionInterval, 20, \ 1320248619Sdes "How often should we maximally compact the heap (not allowing " \ 1321248619Sdes "any dead space)") \ 1322248619Sdes \ 1323248619Sdes product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1324248619Sdes "The collection count for the first maximum compaction") \ 1325248619Sdes \ 1326248619Sdes product(bool, UseMaximumCompactionOnSystemGC, true, \ 1327248619Sdes "In the Parallel Old garbage collector maximum compaction for " \ 1328248619Sdes "a system GC") \ 1329248619Sdes \ 1330248619Sdes product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1331248619Sdes "The mean used by the par compact dead wood" \ 1332192595Sdes "limiter (a number between 0-100).") \ 1333192595Sdes \ 133460573Skris product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1335197679Sdes "The standard deviation used by the par compact dead wood" \ 1336192595Sdes "limiter (a number between 0-100).") \ 1337192595Sdes \ 1338192595Sdes product(uintx, ParallelGCThreads, 0, \ 133960573Skris "Number of parallel threads parallel gc will use") \ 134060573Skris \ 1341248619Sdes product(bool, UseDynamicNumberOfGCThreads, false, \ 1342248619Sdes "Dynamically choose the number of parallel threads " \ 1343248619Sdes "parallel gc will use") \ 1344248619Sdes \ 1345248619Sdes diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 134660573Skris "Force dynamic selection of the number of" \ 1347248619Sdes "parallel threads parallel gc will use to aid debugging") \ 134860573Skris \ 134960573Skris product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 135060573Skris "Size of heap (bytes) per GC thread used in calculating the " \ 1351197679Sdes "number of GC threads") \ 135260573Skris \ 1353248619Sdes product(bool, TraceDynamicGCThreads, false, \ 1354248619Sdes "Trace the dynamic GC thread usage") \ 1355248619Sdes \ 1356248619Sdes develop(bool, ParallelOldGCSplitALot, false, \ 1357248619Sdes "Provoke splitting (copying data from a young gen space to" \ 1358197679Sdes "multiple destination spaces)") \ 1359248619Sdes \ 1360248619Sdes develop(uintx, ParallelOldGCSplitInterval, 3, \ 136160573Skris "How often to provoke splitting a young gen space") \ 136260573Skris \ 136360573Skris product(uintx, ConcGCThreads, 0, \ 136460573Skris "Number of threads concurrent gc will use") \ 136560573Skris \ 1366248619Sdes product(uintx, YoungPLABSize, 4096, \ 1367248619Sdes "Size of young gen promotion labs (in HeapWords)") \ 1368248619Sdes \ 1369248619Sdes product(uintx, OldPLABSize, 1024, \ 1370215116Sdes "Size of old gen promotion labs (in HeapWords)") \ 1371197679Sdes \ 1372192595Sdes product(uintx, GCTaskTimeStampEntries, 200, \ 1373192595Sdes "Number of time stamp entries per gc worker thread") \ 1374192595Sdes \ 1375197679Sdes product(bool, AlwaysTenure, false, \ 1376192595Sdes "Always tenure objects in eden. (ParallelGC only)") \ 1377192595Sdes \ 1378192595Sdes product(bool, NeverTenure, false, \ 1379192595Sdes "Never tenure objects in eden, May tenure on overflow " \ 1380197679Sdes "(ParallelGC only)") \ 1381197679Sdes \ 138260573Skris product(bool, ScavengeBeforeFullGC, true, \ 1383192595Sdes "Scavenge youngest generation before each full GC, " \ 138492555Sdes "used with UseParallelGC") \ 1385197679Sdes \ 1386197679Sdes develop(bool, ScavengeWithObjectsInToSpace, false, \ 1387124208Sdes "Allow scavenges to occur when to_space contains objects.") \ 1388197679Sdes \ 1389124208Sdes product(bool, UseConcMarkSweepGC, false, \ 1390124208Sdes "Use Concurrent Mark-Sweep GC in the old generation") \ 1391197679Sdes \ 1392197679Sdes product(bool, ExplicitGCInvokesConcurrent, false, \ 139360573Skris "A System.gc() request invokes a concurrent collection;" \ 139460573Skris " (effective only when UseConcMarkSweepGC)") \ 1395197679Sdes \ 139692555Sdes product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 139760573Skris "A System.gc() request invokes a concurrent collection and " \ 139860573Skris "also unloads classes during such a concurrent gc cycle " \ 139960573Skris "(effective only when UseConcMarkSweepGC)") \ 140060573Skris \ 140160573Skris product(bool, GCLockerInvokesConcurrent, false, \ 1402197679Sdes "The exit of a JNI CS necessitating a scavenge also" \ 1403197679Sdes " kicks off a bkgrd concurrent collection") \ 140460573Skris \ 1405197679Sdes product(uintx, GCLockerEdenExpansionPercent, 5, \ 1406197679Sdes "How much the GC can expand the eden by while the GC locker " \ 140760573Skris "is active (as a percentage)") \ 1408197679Sdes \ 1409197679Sdes develop(bool, UseCMSAdaptiveFreeLists, true, \ 1410197679Sdes "Use Adaptive Free Lists in the CMS generation") \ 1411197679Sdes \ 1412197679Sdes develop(bool, UseAsyncConcMarkSweepGC, true, \ 1413197679Sdes "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1414197679Sdes \ 1415106121Sdes develop(bool, RotateCMSCollectionTypes, false, \ 1416197679Sdes "Rotate the CMS collections among concurrent and STW") \ 141760573Skris \ 141860573Skris product(bool, UseCMSBestFit, true, \ 141960573Skris "Use CMS best fit allocation strategy") \ 142060573Skris \ 142160573Skris product(bool, UseCMSCollectionPassing, true, \ 1422197679Sdes "Use passing of collection from background to foreground") \ 1423146998Sdes \ 1424146998Sdes product(bool, UseParNewGC, false, \ 142576259Sgreen "Use parallel threads in the new generation.") \ 142676259Sgreen \ 1427197679Sdes product(bool, ParallelGCVerbose, false, \ 1428197679Sdes "Verbose output for parallel GC.") \ 1429149749Sdes \ 143060573Skris product(intx, ParallelGCBufferWastePct, 10, \ 143176259Sgreen "wasted fraction of parallel allocation buffer.") \ 1432197679Sdes \ 143360573Skris diagnostic(bool, ParallelGCRetainPLAB, false, \ 143492555Sdes "Retain parallel allocation buffers across scavenges; " \ 1435197679Sdes " -- disabled because this currently conflicts with " \ 143692555Sdes " parallel card scanning under certain conditions ") \ 143757429Smarkm \ 143857429Smarkm product(intx, TargetPLABWastePct, 10, \ 143960573Skris "target wasted space in last buffer as pct of overall allocation")\ 144092555Sdes \ 144160573Skris product(uintx, PLABWeight, 75, \ 144299060Sdes "Percentage (0-100) used to weight the current sample when" \ 144392555Sdes "computing exponentially decaying average for ResizePLAB.") \ 144460573Skris \ 144592555Sdes product(bool, ResizePLAB, true, \ 144660573Skris "Dynamically resize (survivor space) promotion labs") \ 144792555Sdes \ 144892555Sdes product(bool, PrintPLAB, false, \ 1449181111Sdes "Print (survivor space) promotion labs sizing decisions") \ 1450197679Sdes \ 145160573Skris product(intx, ParGCArrayScanChunk, 50, \ 1452181111Sdes "Scan a subset and push remainder, if array is bigger than this") \ 145392555Sdes \ 145460573Skris product(bool, ParGCUseLocalOverflow, false, \ 1455181111Sdes "Instead of a global overflow list, use local overflow stacks") \ 145660573Skris \ 145760573Skris product(bool, ParGCTrimOverflow, true, \ 145860573Skris "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 145960573Skris \ 146060573Skris notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 146160573Skris "Whether we should simulate work queue overflow in ParNew") \ 146260573Skris \ 146360573Skris notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 146460573Skris "An `interval' counter that determines how frequently " \ 146560573Skris "we simulate overflow; a smaller number increases frequency") \ 146660573Skris \ 146760573Skris product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1468249475Sdes "The desired number of objects to claim from the overflow list") \ 1469249475Sdes \ 1470249475Sdes diagnostic(uintx, ParGCStridesPerThread, 2, \ 1471249475Sdes "The number of strides per worker thread that we divide up the " \ 1472249475Sdes "card table scanning work into") \ 147399060Sdes \ 147460573Skris diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1475126274Sdes "The number of cards in each chunk of the parallel chunks used " \ 147660573Skris "during card table scanning") \ 147792555Sdes \ 147892555Sdes product(uintx, CMSParPromoteBlocksToClaim, 16, \ 147999060Sdes "Number of blocks to attempt to claim when refilling CMS LAB for "\ 148099060Sdes "parallel GC.") \ 148192555Sdes \ 148260573Skris product(uintx, OldPLABWeight, 50, \ 148360573Skris "Percentage (0-100) used to weight the current sample when" \ 148476259Sgreen "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 148560573Skris \ 148692555Sdes product(bool, ResizeOldPLAB, true, \ 148792555Sdes "Dynamically resize (old gen) promotion labs") \ 148860573Skris \ 148960573Skris product(bool, PrintOldPLAB, false, \ 149060573Skris "Print (old gen) promotion labs sizing decisions") \ 149160573Skris \ 149260573Skris product(uintx, CMSOldPLABMin, 16, \ 149360573Skris "Min size of CMS gen promotion lab caches per worker per blksize")\ 149460573Skris \ 149560573Skris product(uintx, CMSOldPLABMax, 1024, \ 149660573Skris "Max size of CMS gen promotion lab caches per worker per blksize")\ 1497249475Sdes \ 149899060Sdes product(uintx, CMSOldPLABNumRefills, 4, \ 1499126274Sdes "Nominal number of refills of CMS gen promotion lab cache" \ 150060573Skris " per worker per block size") \ 150160573Skris \ 150292555Sdes product(bool, CMSOldPLABResizeQuicker, false, \ 150360573Skris "Whether to react on-the-fly during a scavenge to a sudden" \ 150460573Skris " change in block demand rate") \ 150576259Sgreen \ 150660573Skris product(uintx, CMSOldPLABToleranceFactor, 4, \ 150760573Skris "The tolerance of the phase-change detector for on-the-fly" \ 150860573Skris " PLAB resizing during a scavenge") \ 150960573Skris \ 151057429Smarkm product(uintx, CMSOldPLABReactivityFactor, 2, \ 151157429Smarkm "The gain in the feedback loop for on-the-fly PLAB resizing" \ 151257429Smarkm " during a scavenge") \ 151357429Smarkm \ 151457429Smarkm product(bool, AlwaysPreTouch, false, \ 151557429Smarkm "It forces all freshly committed pages to be pre-touched.") \ 151676259Sgreen \ 151757429Smarkm product_pd(intx, CMSYoungGenPerWorker, \ 1518197679Sdes "The maximum size of young gen chosen by default per GC worker " \ 1519197679Sdes "thread available") \ 1520197679Sdes \ 1521192595Sdes product(bool, CMSIncrementalMode, false, \ 1522197679Sdes "Whether CMS GC should operate in \"incremental\" mode") \ 1523192595Sdes \ 1524192595Sdes product(uintx, CMSIncrementalDutyCycle, 10, \ 1525197679Sdes "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 152657429Smarkm "CMSIncrementalPacing is enabled, then this is just the initial" \ 152757429Smarkm "value") \ 152857429Smarkm \ 152957429Smarkm product(bool, CMSIncrementalPacing, true, \ 153076259Sgreen "Whether the CMS incremental mode duty cycle should be " \ 153192555Sdes "automatically adjusted") \ 153257429Smarkm \ 153357429Smarkm product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1534106121Sdes "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1535197679Sdes "enabled (a percentage, 0-100)") \ 153676259Sgreen \ 153757429Smarkm product(uintx, CMSIncrementalSafetyFactor, 10, \ 153857429Smarkm "Percentage (0-100) used to add conservatism when computing the " \ 153957429Smarkm "duty cycle") \ 154057429Smarkm \ 154176259Sgreen product(uintx, CMSIncrementalOffset, 0, \ 154292555Sdes "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 154357429Smarkm " is shifted to the right within the period between young GCs") \ 1544197679Sdes \ 154557429Smarkm product(uintx, CMSExpAvgFactor, 50, \ 154657429Smarkm "Percentage (0-100) used to weight the current sample when" \ 1547197679Sdes "computing exponential averages for CMS statistics.") \ 1548197679Sdes \ 1549197679Sdes product(uintx, CMS_FLSWeight, 75, \ 1550197679Sdes "Percentage (0-100) used to weight the current sample when" \ 1551197679Sdes "computing exponentially decating averages for CMS FLS statistics.") \ 1552197679Sdes \ 1553197679Sdes product(uintx, CMS_FLSPadding, 1, \ 1554197679Sdes "The multiple of deviation from mean to use for buffering" \ 155557429Smarkm "against volatility in free list demand.") \ 155657429Smarkm \ 155757429Smarkm product(uintx, FLSCoalescePolicy, 2, \ 155857429Smarkm "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 155957429Smarkm \ 156057429Smarkm product(bool, FLSAlwaysCoalesceLarge, false, \ 156192555Sdes "CMS: Larger free blocks are always available for coalescing") \ 156257429Smarkm \ 1563197679Sdes product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 156457429Smarkm "CMS: the smaller the percentage the greater the coalition force")\ 156557429Smarkm \ 156660573Skris product(double, CMSSmallCoalSurplusPercent, 1.05, \ 156792555Sdes "CMS: the factor by which to inflate estimated demand of small" \ 156860573Skris " block sizes to prevent coalescing with an adjoining block") \ 1569197679Sdes \ 157060573Skris product(double, CMSLargeCoalSurplusPercent, 0.95, \ 157160573Skris "CMS: the factor by which to inflate estimated demand of large" \ 1572221420Sdes " block sizes to prevent coalescing with an adjoining block") \ 1573221420Sdes \ 1574221420Sdes product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1575221420Sdes "CMS: the factor by which to inflate estimated demand of small" \ 1576221420Sdes " block sizes to prevent splitting to supply demand for smaller" \ 1577221420Sdes " blocks") \ 1578221420Sdes \ 1579221420Sdes product(double, CMSLargeSplitSurplusPercent, 1.00, \ 158092555Sdes "CMS: the factor by which to inflate estimated demand of large" \ 1581149749Sdes " block sizes to prevent splitting to supply demand for smaller" \ 158260573Skris " blocks") \ 1583197679Sdes \ 1584106121Sdes product(bool, CMSExtrapolateSweep, false, \ 158560573Skris "CMS: cushion for block demand during sweep") \ 158660573Skris \ 1587197679Sdes product(uintx, CMS_SweepWeight, 75, \ 158860573Skris "Percentage (0-100) used to weight the current sample when " \ 158960573Skris "computing exponentially decaying average for inter-sweep " \ 159060573Skris "duration") \ 159160573Skris \ 159260573Skris product(uintx, CMS_SweepPadding, 1, \ 1593197679Sdes "The multiple of deviation from mean to use for buffering " \ 159460573Skris "against volatility in inter-sweep duration.") \ 159560573Skris \ 159657429Smarkm product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 159757429Smarkm "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 159857429Smarkm "duration exceeds this threhold in milliseconds") \ 159957429Smarkm \ 160057429Smarkm develop(bool, CMSTraceIncrementalMode, false, \ 160157429Smarkm "Trace CMS incremental mode") \ 160257429Smarkm \ 160392555Sdes develop(bool, CMSTraceIncrementalPacing, false, \ 160476259Sgreen "Trace CMS incremental mode pacing computation") \ 160557429Smarkm \ 1606197679Sdes develop(bool, CMSTraceThreadState, false, \ 160757429Smarkm "Trace the CMS thread state (enable the trace_state() method)") \ 160857429Smarkm \ 1609181111Sdes product(bool, CMSClassUnloadingEnabled, false, \ 1610181111Sdes "Whether class unloading enabled when using CMS GC") \ 1611181111Sdes \ 1612197679Sdes product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1613181111Sdes "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1614181111Sdes " for which classes may not be unloaded") \ 1615221420Sdes \ 1616221420Sdes product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1617221420Sdes "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1618221420Sdes \ 1619221420Sdes product(bool, UseCMSCompactAtFullCollection, true, \ 1620221420Sdes "Use mark sweep compact at full collections") \ 1621221420Sdes \ 162257429Smarkm product(uintx, CMSFullGCsBeforeCompaction, 0, \ 162357429Smarkm "Number of CMS full collection done before compaction if > 0") \ 162457429Smarkm \ 162557429Smarkm develop(intx, CMSDictionaryChoice, 0, \ 162657429Smarkm "Use BinaryTreeDictionary as default in the CMS generation") \ 162757429Smarkm \ 162857429Smarkm product(uintx, CMSIndexedFreeListReplenish, 4, \ 162957429Smarkm "Replenish an indexed free list with this number of chunks") \ 163057429Smarkm \ 163157429Smarkm product(bool, CMSReplenishIntermediate, true, \ 163257429Smarkm "Replenish all intermediate free-list caches") \ 163357429Smarkm \ 163457429Smarkm product(bool, CMSSplitIndexedFreeListBlocks, true, \ 163557429Smarkm "When satisfying batched demand, split blocks from the " \ 163657429Smarkm "IndexedFreeList whose size is a multiple of requested size") \ 163776259Sgreen \ 163876259Sgreen product(bool, CMSLoopWarn, false, \ 163976259Sgreen "Warn in case of excessive CMS looping") \ 164057429Smarkm \ 164157429Smarkm develop(bool, CMSOverflowEarlyRestoration, false, \ 164257429Smarkm "Whether preserved marks should be restored early") \ 164357429Smarkm \ 164460573Skris product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 164560573Skris "Size of marking stack") \ 164660573Skris \ 164760573Skris product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 164860573Skris "Max size of marking stack") \ 164960573Skris \ 165060573Skris notproduct(bool, CMSMarkStackOverflowALot, false, \ 165160573Skris "Whether we should simulate frequent marking stack / work queue" \ 165260573Skris " overflow") \ 165357429Smarkm \ 165457429Smarkm notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 165557429Smarkm "An `interval' counter that determines how frequently" \ 165657429Smarkm " we simulate overflow; a smaller number increases frequency") \ 165757429Smarkm \ 165857429Smarkm product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 165957429Smarkm "(Temporary, subject to experimentation)" \ 166057429Smarkm "Maximum number of abortable preclean iterations, if > 0") \ 166157429Smarkm \ 166257429Smarkm product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 166357429Smarkm "(Temporary, subject to experimentation)" \ 166457429Smarkm "Maximum time in abortable preclean in ms") \ 166557429Smarkm \ 166657429Smarkm product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 166757429Smarkm "(Temporary, subject to experimentation)" \ 166857429Smarkm "Nominal minimum work per abortable preclean iteration") \ 166957429Smarkm \ 1670106121Sdes manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 167157429Smarkm "(Temporary, subject to experimentation)" \ 167257429Smarkm " Time that we sleep between iterations when not given" \ 167357429Smarkm " enough work per iteration") \ 167457429Smarkm \ 167557429Smarkm product(uintx, CMSRescanMultiple, 32, \ 167657429Smarkm "Size (in cards) of CMS parallel rescan task") \ 167757429Smarkm \ 167857429Smarkm product(uintx, CMSConcMarkMultiple, 32, \ 167957429Smarkm "Size (in cards) of CMS concurrent MT marking task") \ 168057429Smarkm \ 168157429Smarkm product(bool, CMSAbortSemantics, false, \ 168257429Smarkm "Whether abort-on-overflow semantics is implemented") \ 1683113908Sdes \ 1684124208Sdes product(bool, CMSParallelRemarkEnabled, true, \ 1685113908Sdes "Whether parallel remark enabled (only if ParNewGC)") \ 168657429Smarkm \ 168760573Skris product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 168860573Skris "Whether parallel remark of survivor space" \ 168960573Skris " enabled (effective only if CMSParallelRemarkEnabled)") \ 169060573Skris \ 169160573Skris product(bool, CMSPLABRecordAlways, true, \ 169260573Skris "Whether to always record survivor space PLAB bdries" \ 169360573Skris " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 169492555Sdes \ 169560573Skris product(bool, CMSConcurrentMTEnabled, true, \ 169657429Smarkm "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 169757429Smarkm \ 169857429Smarkm product(bool, CMSPrecleaningEnabled, true, \ 169957429Smarkm "Whether concurrent precleaning enabled") \ 170092555Sdes \ 170157429Smarkm product(uintx, CMSPrecleanIter, 3, \ 170257429Smarkm "Maximum number of precleaning iteration passes") \ 170357429Smarkm \ 1704126274Sdes product(uintx, CMSPrecleanNumerator, 2, \ 170557429Smarkm "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 170657429Smarkm " ratio") \ 170757429Smarkm \ 170857429Smarkm product(uintx, CMSPrecleanDenominator, 3, \ 170957429Smarkm "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 171092555Sdes " ratio") \ 171157429Smarkm \ 1712197679Sdes product(bool, CMSPrecleanRefLists1, true, \ 1713197679Sdes "Preclean ref lists during (initial) preclean phase") \ 1714106121Sdes \ 171557429Smarkm product(bool, CMSPrecleanRefLists2, false, \ 1716197679Sdes "Preclean ref lists during abortable preclean phase") \ 1717197679Sdes \ 1718197679Sdes product(bool, CMSPrecleanSurvivors1, false, \ 1719181111Sdes "Preclean survivors during (initial) preclean phase") \ 1720181111Sdes \ 1721181111Sdes product(bool, CMSPrecleanSurvivors2, true, \ 172257429Smarkm "Preclean survivors during abortable preclean phase") \ 1723181111Sdes \ 172457429Smarkm product(uintx, CMSPrecleanThreshold, 1000, \ 1725197679Sdes "Don't re-iterate if #dirty cards less than this") \ 1726181111Sdes \ 1727197679Sdes product(bool, CMSCleanOnEnter, true, \ 172857429Smarkm "Clean-on-enter optimization for reducing number of dirty cards") \ 172957429Smarkm \ 173057429Smarkm product(uintx, CMSRemarkVerifyVariant, 1, \ 173157429Smarkm "Choose variant (1,2) of verification following remark") \ 173257429Smarkm \ 173357429Smarkm product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 173457429Smarkm "If Eden used is below this value, don't try to schedule remark") \ 173557429Smarkm \ 173657429Smarkm product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 173792555Sdes "The Eden occupancy % at which to try and schedule remark pause") \ 173857429Smarkm \ 173976259Sgreen product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1740181111Sdes "Start sampling Eden top at least before yg occupancy reaches" \ 1741181111Sdes " 1/<ratio> of the size at which we plan to schedule remark") \ 174276259Sgreen \ 1743197679Sdes product(uintx, CMSSamplingGrain, 16*K, \ 1744197679Sdes "The minimum distance between eden samples for CMS (see above)") \ 174557429Smarkm \ 174657429Smarkm product(bool, CMSScavengeBeforeRemark, false, \ 1747197679Sdes "Attempt scavenge before the CMS remark step") \ 1748197679Sdes \ 1749197679Sdes develop(bool, CMSTraceSweeper, false, \ 1750181111Sdes "Trace some actions of the CMS sweeper") \ 1751197679Sdes \ 1752197679Sdes product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1753181111Sdes "Don't drain below this size per parallel worker/thief") \ 1754181111Sdes \ 1755181111Sdes manageable(intx, CMSWaitDuration, 2000, \ 1756197679Sdes "Time in milliseconds that CMS thread waits for young GC") \ 1757181111Sdes \ 1758181111Sdes product(bool, CMSYield, true, \ 1759181111Sdes "Yield between steps of concurrent mark & sweep") \ 1760197679Sdes \ 1761197679Sdes product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1762181111Sdes "Bitmap operations should process at most this many bits" \ 1763197679Sdes "between yields") \ 1764181111Sdes \ 1765181111Sdes product(bool, CMSDumpAtPromotionFailure, false, \ 1766197679Sdes "Dump useful information about the state of the CMS old " \ 1767181111Sdes " generation upon a promotion failure.") \ 1768181111Sdes \ 1769181111Sdes product(bool, CMSPrintChunksInDump, false, \ 1770181111Sdes "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1771181111Sdes " more detailed information about the free chunks.") \ 1772181111Sdes \ 1773181111Sdes product(bool, CMSPrintObjectsInDump, false, \ 1774181111Sdes "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1775181111Sdes " more detailed information about the allocated objects.") \ 1776181111Sdes \ 1777181111Sdes diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1778181111Sdes "Verify that all refs across the FLS boundary " \ 177957429Smarkm " are to valid objects") \ 178057429Smarkm \ 178176259Sgreen diagnostic(bool, FLSVerifyLists, false, \ 178257429Smarkm "Do lots of (expensive) FreeListSpace verification") \ 178357429Smarkm \ 178457429Smarkm diagnostic(bool, FLSVerifyIndexTable, false, \ 178557429Smarkm "Do lots of (expensive) FLS index table verification") \ 178657429Smarkm \ 178792555Sdes develop(bool, FLSVerifyDictionary, false, \ 178857429Smarkm "Do lots of (expensive) FLS dictionary verification") \ 1789197679Sdes \ 179057429Smarkm develop(bool, VerifyBlockOffsetArray, false, \ 179157429Smarkm "Do (expensive!) block offset array verification") \ 179257429Smarkm \ 179357429Smarkm diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 179457429Smarkm "Maintain _unallocated_block in BlockOffsetArray" \ 179592555Sdes " (currently applicable only to CMS collector)") \ 179657429Smarkm \ 1797197679Sdes develop(bool, TraceCMSState, false, \ 1798197679Sdes "Trace the state of the CMS collection") \ 179957429Smarkm \ 1800197679Sdes product(intx, RefDiscoveryPolicy, 0, \ 180157429Smarkm "Whether reference-based(0) or referent-based(1)") \ 180257429Smarkm \ 1803113908Sdes product(bool, ParallelRefProcEnabled, false, \ 1804221420Sdes "Enable parallel reference processing whenever possible") \ 1805113908Sdes \ 1806226046Sdes product(bool, ParallelRefProcBalancingEnabled, true, \ 1807226046Sdes "Enable balancing of reference processing queues") \ 1808113908Sdes \ 1809226046Sdes product(intx, CMSTriggerRatio, 80, \ 1810226046Sdes "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1811226046Sdes "allocated before a CMS collection cycle commences") \ 1812226046Sdes \ 1813226046Sdes product(uintx, CMSBootstrapOccupancy, 50, \ 1814226046Sdes "Percentage CMS generation occupancy at which to " \ 1815226046Sdes "initiate CMS collection for bootstrapping collection stats") \ 1816226046Sdes \ 1817226046Sdes product(intx, CMSInitiatingOccupancyFraction, -1, \ 1818226046Sdes "Percentage CMS generation occupancy to start a CMS collection " \ 1819226046Sdes "cycle. A negative value means that CMSTriggerRatio is used") \ 1820226046Sdes \ 1821226046Sdes product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1822226046Sdes "Percentage of the (entire) heap occupancy to start a " \ 1823226046Sdes "concurrent GC cycle. It us used by GCs that trigger a " \ 1824226046Sdes "concurrent GC cycle based on the occupancy of the entire heap, " \ 1825226046Sdes "not just one of the generations (e.g., G1). A value of 0 " \ 1826226046Sdes "denotes 'do constant GC cycles'.") \ 1827226046Sdes \ 1828226046Sdes product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1829226046Sdes "Only use occupancy as a crierion for starting a CMS collection") \ 1830113908Sdes \ 1831113908Sdes product(intx, CMSIsTooFullPercentage, 98, \ 183257429Smarkm "An absolute ceiling above which CMS will always consider the " \ 183357429Smarkm "perm gen ripe for collection") \ 183457429Smarkm \ 1835221420Sdes develop(bool, CMSTestInFreeList, false, \ 183657429Smarkm "Check if the coalesced range is already in the " \ 1837197679Sdes "free lists as claimed") \ 183876259Sgreen \ 1839197679Sdes notproduct(bool, CMSVerifyReturnedBytes, false, \ 184076259Sgreen "Check that all the garbage collected was returned to the " \ 184157429Smarkm "free lists.") \ 1842197679Sdes \ 184357429Smarkm notproduct(bool, ScavengeALot, false, \ 184457429Smarkm "Force scavenge at every Nth exit from the runtime system " \ 184557429Smarkm "(N=ScavengeALotInterval)") \ 1846116791Sdes \ 1847197679Sdes develop(bool, FullGCALot, false, \ 1848221420Sdes "Force full gc at every Nth exit from the runtime system " \ 184957429Smarkm "(N=FullGCALotInterval)") \ 185057429Smarkm \ 185157429Smarkm notproduct(bool, GCALotAtAllSafepoints, false, \ 185257429Smarkm "Enforce ScavengeALot/GCALot at all potential safepoints") \ 185357429Smarkm \ 185492555Sdes product(bool, PrintPromotionFailure, false, \ 185557429Smarkm "Print additional diagnostic information following " \ 1856197679Sdes " promotion failure") \ 185757429Smarkm \ 185857429Smarkm notproduct(bool, PromotionFailureALot, false, \ 1859137015Sdes "Use promotion failure handling on every youngest generation " \ 1860124208Sdes "collection") \ 186157429Smarkm \ 1862197679Sdes develop(uintx, PromotionFailureALotCount, 1000, \ 1863124208Sdes "Number of promotion failures occurring at ParGCAllocBuffer" \ 1864197679Sdes "refill attempts (ParNew) or promotion attempts " \ 186557429Smarkm "(other young collectors) ") \ 186657429Smarkm \ 186757429Smarkm develop(uintx, PromotionFailureALotInterval, 5, \ 1868124208Sdes "Total collections between promotion failures alot") \ 186957429Smarkm \ 187057429Smarkm experimental(intx, WorkStealingSleepMillis, 1, \ 1871197679Sdes "Sleep time when sleep is used for yields") \ 187292555Sdes \ 1873197679Sdes experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 187457429Smarkm "Number of yields before a sleep is done during workstealing") \ 187557429Smarkm \ 187676259Sgreen experimental(uintx, WorkStealingHardSpins, 4096, \ 1877197679Sdes "Number of iterations in a spin loop between checks on " \ 1878197679Sdes "time out of hard spin") \ 1879197679Sdes \ 1880197679Sdes experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 1881197679Sdes "Ratio of hard spins to calls to yield") \ 1882197679Sdes \ 1883197679Sdes develop(uintx, ObjArrayMarkingStride, 512, \ 1884197679Sdes "Number of ObjArray elements to push onto the marking stack" \ 1885197679Sdes "before pushing a continuation entry") \ 1886197679Sdes \ 1887197679Sdes develop(bool, MetadataAllocationFailALot, false, \ 1888197679Sdes "Fail metadata allocations at intervals controlled by " \ 1889197679Sdes "MetadataAllocationFailALotInterval") \ 1890197679Sdes \ 1891197679Sdes develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 1892197679Sdes "metadata allocation failure alot interval") \ 1893197679Sdes \ 1894197679Sdes develop(bool, MetaDataDeallocateALot, false, \ 189592555Sdes "Deallocation bunches of metadata at intervals controlled by " \ 189692555Sdes "MetaDataAllocateALotInterval") \ 189792555Sdes \ 189892555Sdes develop(uintx, MetaDataDeallocateALotInterval, 100, \ 1899197679Sdes "Metadata deallocation alot interval") \ 190092555Sdes \ 190192555Sdes develop(bool, TraceMetadataChunkAllocation, false, \ 190276259Sgreen "Trace humongous metadata allocations") \ 190376259Sgreen \ 190476259Sgreen product(bool, TraceMetadataHumongousAllocation, false, \ 190576259Sgreen "Trace humongous metadata allocations") \ 190676259Sgreen \ 190776259Sgreen develop(bool, TraceMetavirtualspaceAllocation, false, \ 190876259Sgreen "Trace humongous metadata allocations") \ 190976259Sgreen \ 191076259Sgreen notproduct(bool, ExecuteInternalVMTests, false, \ 191176259Sgreen "Enable execution of internal VM tests.") \ 191276259Sgreen \ 191376259Sgreen product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 191476259Sgreen \ 191576259Sgreen product_pd(bool, ResizeTLAB, \ 1916137015Sdes "Dynamically resize tlab size for threads") \ 191776259Sgreen \ 191876259Sgreen product(bool, ZeroTLAB, false, \ 191976259Sgreen "Zero out the newly created TLAB") \ 192076259Sgreen \ 192192555Sdes product(bool, FastTLABRefill, true, \ 192276259Sgreen "Use fast TLAB refill code") \ 1923137015Sdes \ 1924162852Sdes product(bool, PrintTLAB, false, \ 1925137015Sdes "Print various TLAB related information") \ 192676259Sgreen \ 192776259Sgreen product(bool, TLABStats, true, \ 1928124208Sdes "Print various TLAB related information") \ 1929224638Sbrooks \ 1930224638Sbrooks EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 1931224638Sbrooks "Enable LowMemoryProtection")) \ 1932224638Sbrooks \ 1933224638Sbrooks product_pd(bool, NeverActAsServerClassMachine, \ 1934224638Sbrooks "Never act like a server-class machine") \ 1935224638Sbrooks \ 1936224638Sbrooks product(bool, AlwaysActAsServerClassMachine, false, \ 1937137015Sdes "Always act like a server-class machine") \ 1938124208Sdes \ 1939124208Sdes product_pd(uint64_t, MaxRAM, \ 1940124208Sdes "Real memory size (in bytes) used to set maximum heap size") \ 1941124208Sdes \ 1942124208Sdes product(uintx, ErgoHeapSizeLimit, 0, \ 1943224638Sbrooks "Maximum ergonomically set heap size (in bytes); zero means use " \ 1944224638Sbrooks "MaxRAM / MaxRAMFraction") \ 1945224638Sbrooks \ 1946224638Sbrooks product(uintx, MaxRAMFraction, 4, \ 1947224638Sbrooks "Maximum fraction (1/n) of real memory used for maximum heap " \ 1948224638Sbrooks "size") \ 1949124208Sdes \ 1950197679Sdes product(uintx, DefaultMaxRAMFraction, 4, \ 1951197679Sdes "Maximum fraction (1/n) of real memory used for maximum heap " \ 1952197679Sdes "size; deprecated: to be renamed to MaxRAMFraction") \ 1953197679Sdes \ 1954197679Sdes product(uintx, MinRAMFraction, 2, \ 1955197679Sdes "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 1956124208Sdes "size on systems with small physical memory size") \ 1957124208Sdes \ 1958124208Sdes product(uintx, InitialRAMFraction, 64, \ 1959124208Sdes "Fraction (1/n) of real memory used for initial heap size") \ 1960124208Sdes \ 1961197679Sdes product(bool, UseAutoGCSelectPolicy, false, \ 1962124208Sdes "Use automatic collection selection policy") \ 1963149749Sdes \ 1964149749Sdes product(uintx, AutoGCSelectPauseMillis, 5000, \ 1965149749Sdes "Automatic GC selection pause threshhold in ms") \ 1966149749Sdes \ 1967197679Sdes product(bool, UseAdaptiveSizePolicy, true, \ 1968149749Sdes "Use adaptive generation sizing policies") \ 1969149749Sdes \ 1970149749Sdes product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1971149749Sdes "Use adaptive survivor sizing policies") \ 1972149749Sdes \ 1973197679Sdes product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1974149749Sdes "Use adaptive young-old sizing policies at minor collections") \ 1975197679Sdes \ 1976197679Sdes product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1977197679Sdes "Use adaptive young-old sizing policies at major collections") \ 1978197679Sdes \ 1979197679Sdes product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1980197679Sdes "Use statistics from System.GC for adaptive size policy") \ 1981197679Sdes \ 1982197679Sdes product(bool, UseAdaptiveGCBoundary, false, \ 1983197679Sdes "Allow young-old boundary to move") \ 1984197679Sdes \ 1985197679Sdes develop(bool, TraceAdaptiveGCBoundary, false, \ 1986197679Sdes "Trace young-old boundary moves") \ 1987197679Sdes \ 1988197679Sdes develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1989197679Sdes "Resize the virtual spaces of the young or old generations") \ 1990197679Sdes \ 1991197679Sdes product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1992197679Sdes "Policy for changeing generation size for throughput goals") \ 1993197679Sdes \ 1994197679Sdes product(uintx, AdaptiveSizePausePolicy, 0, \ 1995197679Sdes "Policy for changing generation size for pause goals") \ 1996197679Sdes \ 1997197679Sdes develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1998197679Sdes "Adjust tenured generation to achive a minor pause goal") \ 1999197679Sdes \ 2000197679Sdes develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2001197679Sdes "Adjust young generation to achive a major pause goal") \ 2002197679Sdes \ 2003197679Sdes product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2004197679Sdes "Number of steps where heuristics is used before data is used") \ 2005197679Sdes \ 2006197679Sdes develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2007197679Sdes "Number of collections before the adaptive sizing is started") \ 2008197679Sdes \ 2009197679Sdes product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2010197679Sdes "Collecton interval for printing information; zero => never") \ 2011197679Sdes \ 2012197679Sdes product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2013197679Sdes "Use adaptive minimum footprint as a goal") \ 2014197679Sdes \ 2015197679Sdes product(uintx, AdaptiveSizePolicyWeight, 10, \ 2016197679Sdes "Weight given to exponential resizing, between 0 and 100") \ 2017197679Sdes \ 2018197679Sdes product(uintx, AdaptiveTimeWeight, 25, \ 2019197679Sdes "Weight given to time in adaptive policy, between 0 and 100") \ 2020197679Sdes \ 2021197679Sdes product(uintx, PausePadding, 1, \ 2022197679Sdes "How much buffer to keep for pause time") \ 2023197679Sdes \ 2024197679Sdes product(uintx, PromotedPadding, 3, \ 2025197679Sdes "How much buffer to keep for promotion failure") \ 2026197679Sdes \ 2027197679Sdes product(uintx, SurvivorPadding, 3, \ 2028197679Sdes "How much buffer to keep for survivor overflow") \ 2029197679Sdes \ 2030197679Sdes product(uintx, ThresholdTolerance, 10, \ 2031197679Sdes "Allowed collection cost difference between generations") \ 2032197679Sdes \ 2033197679Sdes product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2034197679Sdes "If collection costs are within margin, reduce both by full " \ 2035197679Sdes "delta") \ 2036197679Sdes \ 2037197679Sdes product(uintx, YoungGenerationSizeIncrement, 20, \ 2038197679Sdes "Adaptive size percentage change in young generation") \ 2039197679Sdes \ 2040224638Sbrooks product(uintx, YoungGenerationSizeSupplement, 80, \ 2041224638Sbrooks "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2042224638Sbrooks \ 2043224638Sbrooks product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2044224638Sbrooks "Decay factor to YoungedGenerationSizeSupplement") \ 2045224638Sbrooks \ 2046224638Sbrooks product(uintx, TenuredGenerationSizeIncrement, 20, \ 2047224638Sbrooks "Adaptive size percentage change in tenured generation") \ 2048 \ 2049 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2050 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2051 \ 2052 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2053 "Decay factor to TenuredGenerationSizeIncrement") \ 2054 \ 2055 product(uintx, MaxGCPauseMillis, max_uintx, \ 2056 "Adaptive size policy maximum GC pause time goal in msec, " \ 2057 "or (G1 Only) the max. GC time per MMU time slice") \ 2058 \ 2059 product(uintx, GCPauseIntervalMillis, 0, \ 2060 "Time slice for MMU specification") \ 2061 \ 2062 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2063 "Adaptive size policy maximum GC minor pause time goal in msec") \ 2064 \ 2065 product(uintx, GCTimeRatio, 99, \ 2066 "Adaptive size policy application time to GC time ratio") \ 2067 \ 2068 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2069 "Adaptive size scale down factor for shrinking") \ 2070 \ 2071 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2072 "Adaptive size decays the major cost for long major intervals") \ 2073 \ 2074 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2075 "Time scale over which major costs decay") \ 2076 \ 2077 product(uintx, MinSurvivorRatio, 3, \ 2078 "Minimum ratio of young generation/survivor space size") \ 2079 \ 2080 product(uintx, InitialSurvivorRatio, 8, \ 2081 "Initial ratio of eden/survivor space size") \ 2082 \ 2083 product(uintx, BaseFootPrintEstimate, 256*M, \ 2084 "Estimate of footprint other than Java Heap") \ 2085 \ 2086 product(bool, UseGCOverheadLimit, true, \ 2087 "Use policy to limit of proportion of time spent in GC " \ 2088 "before an OutOfMemory error is thrown") \ 2089 \ 2090 product(uintx, GCTimeLimit, 98, \ 2091 "Limit of proportion of time spent in GC before an OutOfMemory" \ 2092 "error is thrown (used with GCHeapFreeLimit)") \ 2093 \ 2094 product(uintx, GCHeapFreeLimit, 2, \ 2095 "Minimum percentage of free space after a full GC before an " \ 2096 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2097 \ 2098 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2099 "Number of consecutive collections before gc time limit fires") \ 2100 \ 2101 product(bool, PrintAdaptiveSizePolicy, false, \ 2102 "Print information about AdaptiveSizePolicy") \ 2103 \ 2104 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2105 "How far ahead to prefetch destination area (<= 0 means off)") \ 2106 \ 2107 product(intx, PrefetchScanIntervalInBytes, -1, \ 2108 "How far ahead to prefetch scan area (<= 0 means off)") \ 2109 \ 2110 product(intx, PrefetchFieldsAhead, -1, \ 2111 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2112 \ 2113 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2114 "Verify system before exiting") \ 2115 \ 2116 diagnostic(bool, VerifyBeforeGC, false, \ 2117 "Verify memory system before GC") \ 2118 \ 2119 diagnostic(bool, VerifyAfterGC, false, \ 2120 "Verify memory system after GC") \ 2121 \ 2122 diagnostic(bool, VerifyDuringGC, false, \ 2123 "Verify memory system during GC (between phases)") \ 2124 \ 2125 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2126 "Enable parallel memory system verification") \ 2127 \ 2128 diagnostic(bool, DeferInitialCardMark, false, \ 2129 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2130 "may arise from new_pre_store_barrier") \ 2131 \ 2132 diagnostic(bool, VerifyRememberedSets, false, \ 2133 "Verify GC remembered sets") \ 2134 \ 2135 diagnostic(bool, VerifyObjectStartArray, true, \ 2136 "Verify GC object start array if verify before/after") \ 2137 \ 2138 product(bool, DisableExplicitGC, false, \ 2139 "Tells whether calling System.gc() does a full GC") \ 2140 \ 2141 notproduct(bool, CheckMemoryInitialization, false, \ 2142 "Checks memory initialization") \ 2143 \ 2144 product(bool, CollectGen0First, false, \ 2145 "Collect youngest generation before each full GC") \ 2146 \ 2147 diagnostic(bool, BindCMSThreadToCPU, false, \ 2148 "Bind CMS Thread to CPU if possible") \ 2149 \ 2150 diagnostic(uintx, CPUForCMSThread, 0, \ 2151 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2152 \ 2153 product(bool, BindGCTaskThreadsToCPUs, false, \ 2154 "Bind GCTaskThreads to CPUs if possible") \ 2155 \ 2156 product(bool, UseGCTaskAffinity, false, \ 2157 "Use worker affinity when asking for GCTasks") \ 2158 \ 2159 product(uintx, ProcessDistributionStride, 4, \ 2160 "Stride through processors when distributing processes") \ 2161 \ 2162 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2163 "number of times the coordinator GC thread will sleep while " \ 2164 "yielding before giving up and resuming GC") \ 2165 \ 2166 product(uintx, CMSYieldSleepCount, 0, \ 2167 "number of times a GC thread (minus the coordinator) " \ 2168 "will sleep while yielding before giving up and resuming GC") \ 2169 \ 2170 /* gc tracing */ \ 2171 manageable(bool, PrintGC, false, \ 2172 "Print message at garbage collect") \ 2173 \ 2174 manageable(bool, PrintGCDetails, false, \ 2175 "Print more details at garbage collect") \ 2176 \ 2177 manageable(bool, PrintGCDateStamps, false, \ 2178 "Print date stamps at garbage collect") \ 2179 \ 2180 manageable(bool, PrintGCTimeStamps, false, \ 2181 "Print timestamps at garbage collect") \ 2182 \ 2183 product(bool, PrintGCTaskTimeStamps, false, \ 2184 "Print timestamps for individual gc worker thread tasks") \ 2185 \ 2186 develop(intx, ConcGCYieldTimeout, 0, \ 2187 "If non-zero, assert that GC threads yield within this # of ms.") \ 2188 \ 2189 notproduct(bool, TraceMarkSweep, false, \ 2190 "Trace mark sweep") \ 2191 \ 2192 product(bool, PrintReferenceGC, false, \ 2193 "Print times spent handling reference objects during GC " \ 2194 " (enabled only when PrintGCDetails)") \ 2195 \ 2196 develop(bool, TraceReferenceGC, false, \ 2197 "Trace handling of soft/weak/final/phantom references") \ 2198 \ 2199 develop(bool, TraceFinalizerRegistration, false, \ 2200 "Trace registration of final references") \ 2201 \ 2202 notproduct(bool, TraceScavenge, false, \ 2203 "Trace scavenge") \ 2204 \ 2205 product_rw(bool, TraceClassLoading, false, \ 2206 "Trace all classes loaded") \ 2207 \ 2208 product(bool, TraceClassLoadingPreorder, false, \ 2209 "Trace all classes loaded in order referenced (not loaded)") \ 2210 \ 2211 product_rw(bool, TraceClassUnloading, false, \ 2212 "Trace unloading of classes") \ 2213 \ 2214 product_rw(bool, TraceLoaderConstraints, false, \ 2215 "Trace loader constraints") \ 2216 \ 2217 develop(bool, TraceClassLoaderData, false, \ 2218 "Trace class loader loader_data lifetime") \ 2219 \ 2220 product(uintx, InitialBootClassLoaderMetaspaceSize, 3*M, \ 2221 "Initial size of the boot class loader data metaspace") \ 2222 \ 2223 product(bool, TraceGen0Time, false, \ 2224 "Trace accumulated time for Gen 0 collection") \ 2225 \ 2226 product(bool, TraceGen1Time, false, \ 2227 "Trace accumulated time for Gen 1 collection") \ 2228 \ 2229 product(bool, PrintTenuringDistribution, false, \ 2230 "Print tenuring age information") \ 2231 \ 2232 product_rw(bool, PrintHeapAtGC, false, \ 2233 "Print heap layout before and after each GC") \ 2234 \ 2235 product_rw(bool, PrintHeapAtGCExtended, false, \ 2236 "Prints extended information about the layout of the heap " \ 2237 "when -XX:+PrintHeapAtGC is set") \ 2238 \ 2239 product(bool, PrintHeapAtSIGBREAK, true, \ 2240 "Print heap layout in response to SIGBREAK") \ 2241 \ 2242 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2243 "Print a class histogram before any major stop-world GC") \ 2244 \ 2245 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2246 "Print a class histogram after any major stop-world GC") \ 2247 \ 2248 manageable(bool, PrintClassHistogram, false, \ 2249 "Print a histogram of class instances") \ 2250 \ 2251 develop(bool, TraceWorkGang, false, \ 2252 "Trace activities of work gangs") \ 2253 \ 2254 product(bool, TraceParallelOldGCTasks, false, \ 2255 "Trace multithreaded GC activity") \ 2256 \ 2257 develop(bool, TraceBlockOffsetTable, false, \ 2258 "Print BlockOffsetTable maps") \ 2259 \ 2260 develop(bool, TraceCardTableModRefBS, false, \ 2261 "Print CardTableModRefBS maps") \ 2262 \ 2263 develop(bool, TraceGCTaskManager, false, \ 2264 "Trace actions of the GC task manager") \ 2265 \ 2266 develop(bool, TraceGCTaskQueue, false, \ 2267 "Trace actions of the GC task queues") \ 2268 \ 2269 diagnostic(bool, TraceGCTaskThread, false, \ 2270 "Trace actions of the GC task threads") \ 2271 \ 2272 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2273 "Print the time taken by each parallel old gc phase." \ 2274 "PrintGCDetails must also be enabled.") \ 2275 \ 2276 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2277 "Trace parallel old gc marking phase") \ 2278 \ 2279 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2280 "Trace parallel old gc summary phase") \ 2281 \ 2282 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2283 "Trace parallel old gc compaction phase") \ 2284 \ 2285 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2286 "Trace parallel old gc dense prefix computation") \ 2287 \ 2288 develop(bool, IgnoreLibthreadGPFault, false, \ 2289 "Suppress workaround for libthread GP fault") \ 2290 \ 2291 product(bool, PrintJNIGCStalls, false, \ 2292 "Print diagnostic message when GC is stalled" \ 2293 "by JNI critical section") \ 2294 \ 2295 /* GC log rotation setting */ \ 2296 \ 2297 product(bool, UseGCLogFileRotation, false, \ 2298 "Prevent large gclog file for long running app. " \ 2299 "Requires -Xloggc:<filename>") \ 2300 \ 2301 product(uintx, NumberOfGCLogFiles, 0, \ 2302 "Number of gclog files in rotation, " \ 2303 "Default: 0, no rotation") \ 2304 \ 2305 product(uintx, GCLogFileSize, 0, \ 2306 "GC log file size, Default: 0 bytes, no rotation " \ 2307 "Only valid with UseGCLogFileRotation") \ 2308 \ 2309 /* JVMTI heap profiling */ \ 2310 \ 2311 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2312 "Trace JVMTI object tagging calls") \ 2313 \ 2314 diagnostic(bool, VerifyBeforeIteration, false, \ 2315 "Verify memory system before JVMTI iteration") \ 2316 \ 2317 /* compiler interface */ \ 2318 \ 2319 develop(bool, CIPrintCompilerName, false, \ 2320 "when CIPrint is active, print the name of the active compiler") \ 2321 \ 2322 develop(bool, CIPrintCompileQueue, false, \ 2323 "display the contents of the compile queue whenever a " \ 2324 "compilation is enqueued") \ 2325 \ 2326 develop(bool, CIPrintRequests, false, \ 2327 "display every request for compilation") \ 2328 \ 2329 product(bool, CITime, false, \ 2330 "collect timing information for compilation") \ 2331 \ 2332 develop(bool, CITimeEach, false, \ 2333 "display timing information after each successful compilation") \ 2334 \ 2335 develop(bool, CICountOSR, true, \ 2336 "use a separate counter when assigning ids to osr compilations") \ 2337 \ 2338 develop(bool, CICompileNatives, true, \ 2339 "compile native methods if supported by the compiler") \ 2340 \ 2341 develop_pd(bool, CICompileOSR, \ 2342 "compile on stack replacement methods if supported by the " \ 2343 "compiler") \ 2344 \ 2345 develop(bool, CIPrintMethodCodes, false, \ 2346 "print method bytecodes of the compiled code") \ 2347 \ 2348 develop(bool, CIPrintTypeFlow, false, \ 2349 "print the results of ciTypeFlow analysis") \ 2350 \ 2351 develop(bool, CITraceTypeFlow, false, \ 2352 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2353 \ 2354 develop(intx, OSROnlyBCI, -1, \ 2355 "OSR only at this bci. Negative values mean exclude that bci") \ 2356 \ 2357 /* compiler */ \ 2358 \ 2359 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2360 "Number of compiler threads to run") \ 2361 \ 2362 product(intx, CompilationPolicyChoice, 0, \ 2363 "which compilation policy (0/1)") \ 2364 \ 2365 develop(bool, UseStackBanging, true, \ 2366 "use stack banging for stack overflow checks (required for " \ 2367 "proper StackOverflow handling; disable only to measure cost " \ 2368 "of stackbanging)") \ 2369 \ 2370 develop(bool, UseStrictFP, true, \ 2371 "use strict fp if modifier strictfp is set") \ 2372 \ 2373 develop(bool, GenerateSynchronizationCode, true, \ 2374 "generate locking/unlocking code for synchronized methods and " \ 2375 "monitors") \ 2376 \ 2377 develop(bool, GenerateCompilerNullChecks, true, \ 2378 "Generate explicit null checks for loads/stores/calls") \ 2379 \ 2380 develop(bool, GenerateRangeChecks, true, \ 2381 "Generate range checks for array accesses") \ 2382 \ 2383 develop_pd(bool, ImplicitNullChecks, \ 2384 "generate code for implicit null checks") \ 2385 \ 2386 product(bool, PrintSafepointStatistics, false, \ 2387 "print statistics about safepoint synchronization") \ 2388 \ 2389 product(intx, PrintSafepointStatisticsCount, 300, \ 2390 "total number of safepoint statistics collected " \ 2391 "before printing them out") \ 2392 \ 2393 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2394 "print safepoint statistics only when safepoint takes" \ 2395 " more than PrintSafepointSatisticsTimeout in millis") \ 2396 \ 2397 product(bool, TraceSafepointCleanupTime, false, \ 2398 "print the break down of clean up tasks performed during" \ 2399 " safepoint") \ 2400 \ 2401 product(bool, Inline, true, \ 2402 "enable inlining") \ 2403 \ 2404 product(bool, ClipInlining, true, \ 2405 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2406 \ 2407 develop(bool, UseCHA, true, \ 2408 "enable CHA") \ 2409 \ 2410 product(bool, UseTypeProfile, true, \ 2411 "Check interpreter profile for historically monomorphic calls") \ 2412 \ 2413 notproduct(bool, TimeCompiler, false, \ 2414 "time the compiler") \ 2415 \ 2416 diagnostic(bool, PrintInlining, false, \ 2417 "prints inlining optimizations") \ 2418 \ 2419 product(bool, UsePopCountInstruction, false, \ 2420 "Use population count instruction") \ 2421 \ 2422 develop(bool, EagerInitialization, false, \ 2423 "Eagerly initialize classes if possible") \ 2424 \ 2425 develop(bool, TraceMethodReplacement, false, \ 2426 "Print when methods are replaced do to recompilation") \ 2427 \ 2428 develop(bool, PrintMethodFlushing, false, \ 2429 "print the nmethods being flushed") \ 2430 \ 2431 develop(bool, UseRelocIndex, false, \ 2432 "use an index to speed random access to relocations") \ 2433 \ 2434 develop(bool, StressCodeBuffers, false, \ 2435 "Exercise code buffer expansion and other rare state changes") \ 2436 \ 2437 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2438 "Generate extra debugging info for non-safepoints in nmethods") \ 2439 \ 2440 product(bool, PrintVMOptions, false, \ 2441 "Print flags that appeared on the command line") \ 2442 \ 2443 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2444 "Ignore unrecognized VM options") \ 2445 \ 2446 product(bool, PrintCommandLineFlags, false, \ 2447 "Print flags specified on command line or set by ergonomics") \ 2448 \ 2449 product(bool, PrintFlagsInitial, false, \ 2450 "Print all VM flags before argument processing and exit VM") \ 2451 \ 2452 product(bool, PrintFlagsFinal, false, \ 2453 "Print all VM flags after argument and ergonomic processing") \ 2454 \ 2455 notproduct(bool, PrintFlagsWithComments, false, \ 2456 "Print all VM flags with default values and descriptions and exit")\ 2457 \ 2458 diagnostic(bool, SerializeVMOutput, true, \ 2459 "Use a mutex to serialize output to tty and hotspot.log") \ 2460 \ 2461 diagnostic(bool, DisplayVMOutput, true, \ 2462 "Display all VM output on the tty, independently of LogVMOutput") \ 2463 \ 2464 diagnostic(bool, LogVMOutput, trueInDebug, \ 2465 "Save VM output to hotspot.log, or to LogFile") \ 2466 \ 2467 diagnostic(ccstr, LogFile, NULL, \ 2468 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2469 \ 2470 product(ccstr, ErrorFile, NULL, \ 2471 "If an error occurs, save the error data to this file " \ 2472 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2473 \ 2474 product(bool, DisplayVMOutputToStderr, false, \ 2475 "If DisplayVMOutput is true, display all VM output to stderr") \ 2476 \ 2477 product(bool, DisplayVMOutputToStdout, false, \ 2478 "If DisplayVMOutput is true, display all VM output to stdout") \ 2479 \ 2480 product(bool, UseHeavyMonitors, false, \ 2481 "use heavyweight instead of lightweight Java monitors") \ 2482 \ 2483 product(bool, PrintStringTableStatistics, false, \ 2484 "print statistics about the StringTable and SymbolTable") \ 2485 \ 2486 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2487 "print histogram of the symbol table") \ 2488 \ 2489 notproduct(bool, ExitVMOnVerifyError, false, \ 2490 "standard exit from VM if bytecode verify error " \ 2491 "(only in debug mode)") \ 2492 \ 2493 notproduct(ccstr, AbortVMOnException, NULL, \ 2494 "Call fatal if this exception is thrown. Example: " \ 2495 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2496 \ 2497 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2498 "Call fatal if the exception pointed by AbortVMOnException " \ 2499 "has this message.") \ 2500 \ 2501 develop(bool, DebugVtables, false, \ 2502 "add debugging code to vtable dispatch") \ 2503 \ 2504 develop(bool, PrintVtables, false, \ 2505 "print vtables when printing klass") \ 2506 \ 2507 notproduct(bool, PrintVtableStats, false, \ 2508 "print vtables stats at end of run") \ 2509 \ 2510 develop(bool, TraceCreateZombies, false, \ 2511 "trace creation of zombie nmethods") \ 2512 \ 2513 notproduct(bool, IgnoreLockingAssertions, false, \ 2514 "disable locking assertions (for speed)") \ 2515 \ 2516 product(bool, RangeCheckElimination, true, \ 2517 "Split loop iterations to eliminate range checks") \ 2518 \ 2519 develop_pd(bool, UncommonNullCast, \ 2520 "track occurrences of null in casts; adjust compiler tactics") \ 2521 \ 2522 develop(bool, TypeProfileCasts, true, \ 2523 "treat casts like calls for purposes of type profiling") \ 2524 \ 2525 develop(bool, DelayCompilationDuringStartup, true, \ 2526 "Delay invoking the compiler until main application class is " \ 2527 "loaded") \ 2528 \ 2529 develop(bool, CompileTheWorld, false, \ 2530 "Compile all methods in all classes in bootstrap class path " \ 2531 "(stress test)") \ 2532 \ 2533 develop(bool, CompileTheWorldPreloadClasses, true, \ 2534 "Preload all classes used by a class before start loading") \ 2535 \ 2536 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2537 "Force a safepoint every n compiles so sweeper can keep up") \ 2538 \ 2539 develop(bool, FillDelaySlots, true, \ 2540 "Fill delay slots (on SPARC only)") \ 2541 \ 2542 develop(bool, TimeLivenessAnalysis, false, \ 2543 "Time computation of bytecode liveness analysis") \ 2544 \ 2545 develop(bool, TraceLivenessGen, false, \ 2546 "Trace the generation of liveness analysis information") \ 2547 \ 2548 notproduct(bool, TraceLivenessQuery, false, \ 2549 "Trace queries of liveness analysis information") \ 2550 \ 2551 notproduct(bool, CollectIndexSetStatistics, false, \ 2552 "Collect information about IndexSets") \ 2553 \ 2554 develop(bool, UseLoopSafepoints, true, \ 2555 "Generate Safepoint nodes in every loop") \ 2556 \ 2557 develop(intx, FastAllocateSizeLimit, 128*K, \ 2558 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2559 "Inline allocations larger than this in doublewords must go slow")\ 2560 \ 2561 product(bool, AggressiveOpts, false, \ 2562 "Enable aggressive optimizations - see arguments.cpp") \ 2563 \ 2564 product(bool, UseStringCache, false, \ 2565 "Enable String cache capabilities on String.java") \ 2566 \ 2567 /* statistics */ \ 2568 develop(bool, CountCompiledCalls, false, \ 2569 "counts method invocations") \ 2570 \ 2571 notproduct(bool, CountRuntimeCalls, false, \ 2572 "counts VM runtime calls") \ 2573 \ 2574 develop(bool, CountJNICalls, false, \ 2575 "counts jni method invocations") \ 2576 \ 2577 notproduct(bool, CountJVMCalls, false, \ 2578 "counts jvm method invocations") \ 2579 \ 2580 notproduct(bool, CountRemovableExceptions, false, \ 2581 "count exceptions that could be replaced by branches due to " \ 2582 "inlining") \ 2583 \ 2584 notproduct(bool, ICMissHistogram, false, \ 2585 "produce histogram of IC misses") \ 2586 \ 2587 notproduct(bool, PrintClassStatistics, false, \ 2588 "prints class statistics at end of run") \ 2589 \ 2590 notproduct(bool, PrintMethodStatistics, false, \ 2591 "prints method statistics at end of run") \ 2592 \ 2593 /* interpreter */ \ 2594 develop(bool, ClearInterpreterLocals, false, \ 2595 "Always clear local variables of interpreter activations upon " \ 2596 "entry") \ 2597 \ 2598 product_pd(bool, RewriteBytecodes, \ 2599 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2600 \ 2601 product_pd(bool, RewriteFrequentPairs, \ 2602 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2603 \ 2604 diagnostic(bool, PrintInterpreter, false, \ 2605 "Prints the generated interpreter code") \ 2606 \ 2607 product(bool, UseInterpreter, true, \ 2608 "Use interpreter for non-compiled methods") \ 2609 \ 2610 develop(bool, UseFastSignatureHandlers, true, \ 2611 "Use fast signature handlers for native calls") \ 2612 \ 2613 product(bool, UseLoopCounter, true, \ 2614 "Increment invocation counter on backward branch") \ 2615 \ 2616 product(bool, UseFastEmptyMethods, true, \ 2617 "Use fast method entry code for empty methods") \ 2618 \ 2619 product(bool, UseFastAccessorMethods, true, \ 2620 "Use fast method entry code for accessor methods") \ 2621 \ 2622 product_pd(bool, UseOnStackReplacement, \ 2623 "Use on stack replacement, calls runtime if invoc. counter " \ 2624 "overflows in loop") \ 2625 \ 2626 notproduct(bool, TraceOnStackReplacement, false, \ 2627 "Trace on stack replacement") \ 2628 \ 2629 product_pd(bool, PreferInterpreterNativeStubs, \ 2630 "Use always interpreter stubs for native methods invoked via " \ 2631 "interpreter") \ 2632 \ 2633 develop(bool, CountBytecodes, false, \ 2634 "Count number of bytecodes executed") \ 2635 \ 2636 develop(bool, PrintBytecodeHistogram, false, \ 2637 "Print histogram of the executed bytecodes") \ 2638 \ 2639 develop(bool, PrintBytecodePairHistogram, false, \ 2640 "Print histogram of the executed bytecode pairs") \ 2641 \ 2642 diagnostic(bool, PrintSignatureHandlers, false, \ 2643 "Print code generated for native method signature handlers") \ 2644 \ 2645 develop(bool, VerifyOops, false, \ 2646 "Do plausibility checks for oops") \ 2647 \ 2648 develop(bool, CheckUnhandledOops, false, \ 2649 "Check for unhandled oops in VM code") \ 2650 \ 2651 develop(bool, VerifyJNIFields, trueInDebug, \ 2652 "Verify jfieldIDs for instance fields") \ 2653 \ 2654 notproduct(bool, VerifyJNIEnvThread, false, \ 2655 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2656 "from JNI") \ 2657 \ 2658 develop(bool, VerifyFPU, false, \ 2659 "Verify FPU state (check for NaN's, etc.)") \ 2660 \ 2661 develop(bool, VerifyThread, false, \ 2662 "Watch the thread register for corruption (SPARC only)") \ 2663 \ 2664 develop(bool, VerifyActivationFrameSize, false, \ 2665 "Verify that activation frame didn't become smaller than its " \ 2666 "minimal size") \ 2667 \ 2668 develop(bool, TraceFrequencyInlining, false, \ 2669 "Trace frequency based inlining") \ 2670 \ 2671 develop_pd(bool, InlineIntrinsics, \ 2672 "Inline intrinsics that can be statically resolved") \ 2673 \ 2674 product_pd(bool, ProfileInterpreter, \ 2675 "Profile at the bytecode level during interpretation") \ 2676 \ 2677 develop_pd(bool, ProfileTraps, \ 2678 "Profile deoptimization traps at the bytecode level") \ 2679 \ 2680 product(intx, ProfileMaturityPercentage, 20, \ 2681 "number of method invocations/branches (expressed as % of " \ 2682 "CompileThreshold) before using the method's profile") \ 2683 \ 2684 develop(bool, PrintMethodData, false, \ 2685 "Print the results of +ProfileInterpreter at end of run") \ 2686 \ 2687 develop(bool, VerifyDataPointer, trueInDebug, \ 2688 "Verify the method data pointer during interpreter profiling") \ 2689 \ 2690 develop(bool, VerifyCompiledCode, false, \ 2691 "Include miscellaneous runtime verifications in nmethod code; " \ 2692 "default off because it disturbs nmethod size heuristics") \ 2693 \ 2694 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2695 "Manually make GC thread crash then dump java stack trace; " \ 2696 "Test only") \ 2697 \ 2698 /* compilation */ \ 2699 product(bool, UseCompiler, true, \ 2700 "use compilation") \ 2701 \ 2702 develop(bool, TraceCompilationPolicy, false, \ 2703 "Trace compilation policy") \ 2704 \ 2705 develop(bool, TimeCompilationPolicy, false, \ 2706 "Time the compilation policy") \ 2707 \ 2708 product(bool, UseCounterDecay, true, \ 2709 "adjust recompilation counters") \ 2710 \ 2711 develop(intx, CounterHalfLifeTime, 30, \ 2712 "half-life time of invocation counters (in secs)") \ 2713 \ 2714 develop(intx, CounterDecayMinIntervalLength, 500, \ 2715 "Min. ms. between invocation of CounterDecay") \ 2716 \ 2717 product(bool, AlwaysCompileLoopMethods, false, \ 2718 "when using recompilation, never interpret methods " \ 2719 "containing loops") \ 2720 \ 2721 product(bool, DontCompileHugeMethods, true, \ 2722 "don't compile methods > HugeMethodLimit") \ 2723 \ 2724 /* Bytecode escape analysis estimation. */ \ 2725 product(bool, EstimateArgEscape, true, \ 2726 "Analyze bytecodes to estimate escape state of arguments") \ 2727 \ 2728 product(intx, BCEATraceLevel, 0, \ 2729 "How much tracing to do of bytecode escape analysis estimates") \ 2730 \ 2731 product(intx, MaxBCEAEstimateLevel, 5, \ 2732 "Maximum number of nested calls that are analyzed by BC EA.") \ 2733 \ 2734 product(intx, MaxBCEAEstimateSize, 150, \ 2735 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2736 \ 2737 product(intx, AllocatePrefetchStyle, 1, \ 2738 "0 = no prefetch, " \ 2739 "1 = prefetch instructions for each allocation, " \ 2740 "2 = use TLAB watermark to gate allocation prefetch, " \ 2741 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2742 \ 2743 product(intx, AllocatePrefetchDistance, -1, \ 2744 "Distance to prefetch ahead of allocation pointer") \ 2745 \ 2746 product(intx, AllocatePrefetchLines, 3, \ 2747 "Number of lines to prefetch ahead of array allocation pointer") \ 2748 \ 2749 product(intx, AllocateInstancePrefetchLines, 1, \ 2750 "Number of lines to prefetch ahead of instance allocation pointer") \ 2751 \ 2752 product(intx, AllocatePrefetchStepSize, 16, \ 2753 "Step size in bytes of sequential prefetch instructions") \ 2754 \ 2755 product(intx, AllocatePrefetchInstr, 0, \ 2756 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2757 \ 2758 /* deoptimization */ \ 2759 develop(bool, TraceDeoptimization, false, \ 2760 "Trace deoptimization") \ 2761 \ 2762 develop(bool, DebugDeoptimization, false, \ 2763 "Tracing various information while debugging deoptimization") \ 2764 \ 2765 product(intx, SelfDestructTimer, 0, \ 2766 "Will cause VM to terminate after a given time (in minutes) " \ 2767 "(0 means off)") \ 2768 \ 2769 product(intx, MaxJavaStackTraceDepth, 1024, \ 2770 "Max. no. of lines in the stack trace for Java exceptions " \ 2771 "(0 means all)") \ 2772 \ 2773 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2774 "Guarantee a safepoint (at least) every so many milliseconds " \ 2775 "(0 means none)")) \ 2776 \ 2777 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2778 "Guarantee a safepoint (at least) every so many milliseconds " \ 2779 "(0 means none)")) \ 2780 \ 2781 product(intx, SafepointTimeoutDelay, 10000, \ 2782 "Delay in milliseconds for option SafepointTimeout") \ 2783 \ 2784 product(intx, NmethodSweepFraction, 16, \ 2785 "Number of invocations of sweeper to cover all nmethods") \ 2786 \ 2787 product(intx, NmethodSweepCheckInterval, 5, \ 2788 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2789 \ 2790 notproduct(bool, LogSweeper, false, \ 2791 "Keep a ring buffer of sweeper activity") \ 2792 \ 2793 notproduct(intx, SweeperLogEntries, 1024, \ 2794 "Number of records in the ring buffer of sweeper activity") \ 2795 \ 2796 notproduct(intx, MemProfilingInterval, 500, \ 2797 "Time between each invocation of the MemProfiler") \ 2798 \ 2799 develop(intx, MallocCatchPtr, -1, \ 2800 "Hit breakpoint when mallocing/freeing this pointer") \ 2801 \ 2802 notproduct(intx, AssertRepeat, 1, \ 2803 "number of times to evaluate expression in assert " \ 2804 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2805 \ 2806 notproduct(ccstrlist, SuppressErrorAt, "", \ 2807 "List of assertions (file:line) to muzzle") \ 2808 \ 2809 notproduct(uintx, HandleAllocationLimit, 1024, \ 2810 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2811 "is used") \ 2812 \ 2813 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2814 "Threshold for total handle allocation when " \ 2815 "+TraceHandleAllocation is used") \ 2816 \ 2817 develop(intx, StackPrintLimit, 100, \ 2818 "number of stack frames to print in VM-level stack dump") \ 2819 \ 2820 notproduct(intx, MaxElementPrintSize, 256, \ 2821 "maximum number of elements to print") \ 2822 \ 2823 notproduct(intx, MaxSubklassPrintSize, 4, \ 2824 "maximum number of subklasses to print when printing klass") \ 2825 \ 2826 product(intx, MaxInlineLevel, 9, \ 2827 "maximum number of nested calls that are inlined") \ 2828 \ 2829 product(intx, MaxRecursiveInlineLevel, 1, \ 2830 "maximum number of nested recursive calls that are inlined") \ 2831 \ 2832 product_pd(intx, InlineSmallCode, \ 2833 "Only inline already compiled methods if their code size is " \ 2834 "less than this") \ 2835 \ 2836 product(intx, MaxInlineSize, 35, \ 2837 "maximum bytecode size of a method to be inlined") \ 2838 \ 2839 product_pd(intx, FreqInlineSize, \ 2840 "maximum bytecode size of a frequent method to be inlined") \ 2841 \ 2842 product(intx, MaxTrivialSize, 6, \ 2843 "maximum bytecode size of a trivial method to be inlined") \ 2844 \ 2845 product(intx, MinInliningThreshold, 250, \ 2846 "min. invocation count a method needs to have to be inlined") \ 2847 \ 2848 develop(intx, MethodHistogramCutoff, 100, \ 2849 "cutoff value for method invoc. histogram (+CountCalls)") \ 2850 \ 2851 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2852 "# of interpreted methods to show in profile") \ 2853 \ 2854 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2855 "# of compiled methods to show in profile") \ 2856 \ 2857 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2858 "# of stub methods to show in profile") \ 2859 \ 2860 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2861 "# of runtime stub nodes to show in profile") \ 2862 \ 2863 product(intx, ProfileIntervalsTicks, 100, \ 2864 "# of ticks between printing of interval profile " \ 2865 "(+ProfileIntervals)") \ 2866 \ 2867 notproduct(intx, ScavengeALotInterval, 1, \ 2868 "Interval between which scavenge will occur with +ScavengeALot") \ 2869 \ 2870 notproduct(intx, FullGCALotInterval, 1, \ 2871 "Interval between which full gc will occur with +FullGCALot") \ 2872 \ 2873 notproduct(intx, FullGCALotStart, 0, \ 2874 "For which invocation to start FullGCAlot") \ 2875 \ 2876 notproduct(intx, FullGCALotDummies, 32*K, \ 2877 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2878 "to move") \ 2879 \ 2880 develop(intx, DontYieldALotInterval, 10, \ 2881 "Interval between which yields will be dropped (milliseconds)") \ 2882 \ 2883 develop(intx, MinSleepInterval, 1, \ 2884 "Minimum sleep() interval (milliseconds) when " \ 2885 "ConvertSleepToYield is off (used for SOLARIS)") \ 2886 \ 2887 develop(intx, ProfilerPCTickThreshold, 15, \ 2888 "Number of ticks in a PC buckets to be a hotspot") \ 2889 \ 2890 notproduct(intx, DeoptimizeALotInterval, 5, \ 2891 "Number of exits until DeoptimizeALot kicks in") \ 2892 \ 2893 notproduct(intx, ZombieALotInterval, 5, \ 2894 "Number of exits until ZombieALot kicks in") \ 2895 \ 2896 develop(bool, StressNonEntrant, false, \ 2897 "Mark nmethods non-entrant at registration") \ 2898 \ 2899 diagnostic(intx, MallocVerifyInterval, 0, \ 2900 "if non-zero, verify C heap after every N calls to " \ 2901 "malloc/realloc/free") \ 2902 \ 2903 diagnostic(intx, MallocVerifyStart, 0, \ 2904 "if non-zero, start verifying C heap after Nth call to " \ 2905 "malloc/realloc/free") \ 2906 \ 2907 product(intx, TypeProfileWidth, 2, \ 2908 "number of receiver types to record in call/cast profile") \ 2909 \ 2910 develop(intx, BciProfileWidth, 2, \ 2911 "number of return bci's to record in ret profile") \ 2912 \ 2913 product(intx, PerMethodRecompilationCutoff, 400, \ 2914 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2915 \ 2916 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2917 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2918 \ 2919 product(intx, PerMethodTrapLimit, 100, \ 2920 "Limit on traps (of one kind) in a method (includes inlines)") \ 2921 \ 2922 product(intx, PerBytecodeTrapLimit, 4, \ 2923 "Limit on traps (of one kind) at a particular BCI") \ 2924 \ 2925 develop(intx, InlineFrequencyRatio, 20, \ 2926 "Ratio of call site execution to caller method invocation") \ 2927 \ 2928 develop_pd(intx, InlineFrequencyCount, \ 2929 "Count of call site execution necessary to trigger frequent " \ 2930 "inlining") \ 2931 \ 2932 develop(intx, InlineThrowCount, 50, \ 2933 "Force inlining of interpreted methods that throw this often") \ 2934 \ 2935 develop(intx, InlineThrowMaxSize, 200, \ 2936 "Force inlining of throwing methods smaller than this") \ 2937 \ 2938 develop(intx, ProfilerNodeSize, 1024, \ 2939 "Size in K to allocate for the Profile Nodes of each thread") \ 2940 \ 2941 product_pd(intx, PreInflateSpin, \ 2942 "Number of times to spin wait before inflation") \ 2943 \ 2944 /* gc parameters */ \ 2945 product(uintx, InitialHeapSize, 0, \ 2946 "Initial heap size (in bytes); zero means OldSize + NewSize") \ 2947 \ 2948 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 2949 "Maximum heap size (in bytes)") \ 2950 \ 2951 product(uintx, OldSize, ScaleForWordSize(4*M), \ 2952 "Initial tenured generation size (in bytes)") \ 2953 \ 2954 product(uintx, NewSize, ScaleForWordSize(1*M), \ 2955 "Initial new generation size (in bytes)") \ 2956 \ 2957 product(uintx, MaxNewSize, max_uintx, \ 2958 "Maximum new generation size (in bytes), max_uintx means set " \ 2959 "ergonomically") \ 2960 \ 2961 product(uintx, PretenureSizeThreshold, 0, \ 2962 "Maximum size in bytes of objects allocated in DefNew " \ 2963 "generation; zero means no maximum") \ 2964 \ 2965 product(uintx, TLABSize, 0, \ 2966 "Starting TLAB size (in bytes); zero means set ergonomically") \ 2967 \ 2968 product(uintx, MinTLABSize, 2*K, \ 2969 "Minimum allowed TLAB size (in bytes)") \ 2970 \ 2971 product(uintx, TLABAllocationWeight, 35, \ 2972 "Allocation averaging weight") \ 2973 \ 2974 product(uintx, TLABWasteTargetPercent, 1, \ 2975 "Percentage of Eden that can be wasted") \ 2976 \ 2977 product(uintx, TLABRefillWasteFraction, 64, \ 2978 "Max TLAB waste at a refill (internal fragmentation)") \ 2979 \ 2980 product(uintx, TLABWasteIncrement, 4, \ 2981 "Increment allowed waste at slow allocation") \ 2982 \ 2983 product(intx, SurvivorRatio, 8, \ 2984 "Ratio of eden/survivor space size") \ 2985 \ 2986 product(intx, NewRatio, 2, \ 2987 "Ratio of new/old generation sizes") \ 2988 \ 2989 product_pd(uintx, NewSizeThreadIncrease, \ 2990 "Additional size added to desired new generation size per " \ 2991 "non-daemon thread (in bytes)") \ 2992 \ 2993 product_pd(uintx, MetaspaceSize, \ 2994 "Initial size of Metaspaces (in bytes)") \ 2995 \ 2996 product(uintx, MaxMetaspaceSize, max_uintx, \ 2997 "Maximum size of Metaspaces (in bytes)") \ 2998 \ 2999 product(uintx, ClassMetaspaceSize, 2*M, \ 3000 "Maximum size of InstanceKlass area in Metaspace used for " \ 3001 "UseCompressedKlassPointers") \ 3002 \ 3003 product(uintx, MinHeapFreeRatio, 40, \ 3004 "Min percentage of heap free after GC to avoid expansion") \ 3005 \ 3006 product(uintx, MaxHeapFreeRatio, 70, \ 3007 "Max percentage of heap free after GC to avoid shrinking") \ 3008 \ 3009 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3010 "Number of milliseconds per MB of free space in the heap") \ 3011 \ 3012 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3013 "Min change in heap space due to GC (in bytes)") \ 3014 \ 3015 product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3016 "Min expansion of permanent heap (in bytes)") \ 3017 \ 3018 product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3019 "Max expansion of permanent heap without full GC (in bytes)") \ 3020 \ 3021 product(intx, QueuedAllocationWarningCount, 0, \ 3022 "Number of times an allocation that queues behind a GC " \ 3023 "will retry before printing a warning") \ 3024 \ 3025 diagnostic(uintx, VerifyGCStartAt, 0, \ 3026 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3027 \ 3028 diagnostic(intx, VerifyGCLevel, 0, \ 3029 "Generation level at which to start +VerifyBefore/AfterGC") \ 3030 \ 3031 product(intx, MaxTenuringThreshold, 15, \ 3032 "Maximum value for tenuring threshold") \ 3033 \ 3034 product(intx, InitialTenuringThreshold, 7, \ 3035 "Initial value for tenuring threshold") \ 3036 \ 3037 product(intx, TargetSurvivorRatio, 50, \ 3038 "Desired percentage of survivor space used after scavenge") \ 3039 \ 3040 product(uintx, MarkSweepDeadRatio, 5, \ 3041 "Percentage (0-100) of the old gen allowed as dead wood." \ 3042 "Serial mark sweep treats this as both the min and max value." \ 3043 "CMS uses this value only if it falls back to mark sweep." \ 3044 "Par compact uses a variable scale based on the density of the" \ 3045 "generation and treats this as the max value when the heap is" \ 3046 "either completely full or completely empty. Par compact also" \ 3047 "has a smaller default value; see arguments.cpp.") \ 3048 \ 3049 product(intx, MarkSweepAlwaysCompactCount, 4, \ 3050 "How often should we fully compact the heap (ignoring the dead " \ 3051 "space parameters)") \ 3052 \ 3053 product(intx, PrintCMSStatistics, 0, \ 3054 "Statistics for CMS") \ 3055 \ 3056 product(bool, PrintCMSInitiationStatistics, false, \ 3057 "Statistics for initiating a CMS collection") \ 3058 \ 3059 product(intx, PrintFLSStatistics, 0, \ 3060 "Statistics for CMS' FreeListSpace") \ 3061 \ 3062 product(intx, PrintFLSCensus, 0, \ 3063 "Census for CMS' FreeListSpace") \ 3064 \ 3065 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3066 "Delay in ms between expansion and allocation") \ 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 product(bool, CICompilerCountPerCPU, false, \ 3193 "1 compiler thread for log(N CPUs)") \ 3194 \ 3195 develop(intx, CIFireOOMAt, -1, \ 3196 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3197 "(non-negative value throws OOM after this many CI accesses " \ 3198 "in each compile)") \ 3199 \ 3200 notproduct(bool, CIObjectFactoryVerify, false, \ 3201 "enable potentially expensive verification in ciObjectFactory") \ 3202 \ 3203 /* Priorities */ \ 3204 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3205 \ 3206 product(intx, ThreadPriorityPolicy, 0, \ 3207 "0 : Normal. "\ 3208 " VM chooses priorities that are appropriate for normal "\ 3209 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3210 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3211 " map to lower native priority values. On Windows applications"\ 3212 " are allowed to use higher native priorities. However, with "\ 3213 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3214 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3215 " interfere with system threads. On Linux thread priorities "\ 3216 " are ignored because the OS does not support static priority "\ 3217 " in SCHED_OTHER scheduling class which is the only choice for"\ 3218 " non-root, non-realtime applications. "\ 3219 "1 : Aggressive. "\ 3220 " Java thread priorities map over to the entire range of "\ 3221 " native thread priorities. Higher Java thread priorities map "\ 3222 " to higher native thread priorities. This policy should be "\ 3223 " used with care, as sometimes it can cause performance "\ 3224 " degradation in the application and/or the entire system. On "\ 3225 " Linux this policy requires root privilege.") \ 3226 \ 3227 product(bool, ThreadPriorityVerbose, false, \ 3228 "Print priority changes") \ 3229 \ 3230 product(intx, DefaultThreadPriority, -1, \ 3231 "The native priority at which threads run if not elsewhere " \ 3232 "specified (-1 means no change)") \ 3233 \ 3234 product(intx, CompilerThreadPriority, -1, \ 3235 "The native priority at which compiler threads should run " \ 3236 "(-1 means no change)") \ 3237 \ 3238 product(intx, VMThreadPriority, -1, \ 3239 "The native priority at which the VM thread should run " \ 3240 "(-1 means no change)") \ 3241 \ 3242 product(bool, CompilerThreadHintNoPreempt, true, \ 3243 "(Solaris only) Give compiler threads an extra quanta") \ 3244 \ 3245 product(bool, VMThreadHintNoPreempt, false, \ 3246 "(Solaris only) Give VM thread an extra quanta") \ 3247 \ 3248 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3249 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3250 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3251 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3252 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3253 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3254 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3255 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3256 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3257 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3258 \ 3259 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3260 "Java thread priority 10 maps to critical scheduling priority") \ 3261 \ 3262 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3263 "Compiler thread(s) run at critical scheduling priority") \ 3264 \ 3265 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3266 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3267 \ 3268 /* compiler debugging */ \ 3269 notproduct(intx, CompileTheWorldStartAt, 1, \ 3270 "First class to consider when using +CompileTheWorld") \ 3271 \ 3272 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3273 "Last class to consider when using +CompileTheWorld") \ 3274 \ 3275 develop(intx, NewCodeParameter, 0, \ 3276 "Testing Only: Create a dedicated integer parameter before " \ 3277 "putback") \ 3278 \ 3279 /* new oopmap storage allocation */ \ 3280 develop(intx, MinOopMapAllocation, 8, \ 3281 "Minimum number of OopMap entries in an OopMapSet") \ 3282 \ 3283 /* Background Compilation */ \ 3284 develop(intx, LongCompileThreshold, 50, \ 3285 "Used with +TraceLongCompiles") \ 3286 \ 3287 product(intx, StarvationMonitorInterval, 200, \ 3288 "Pause between each check in ms") \ 3289 \ 3290 /* recompilation */ \ 3291 product_pd(intx, CompileThreshold, \ 3292 "number of interpreted method invocations before (re-)compiling") \ 3293 \ 3294 product_pd(intx, BackEdgeThreshold, \ 3295 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3296 \ 3297 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3298 "Interpreter (tier 0) invocation notification frequency.") \ 3299 \ 3300 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3301 "C1 without MDO (tier 2) invocation notification frequency.") \ 3302 \ 3303 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3304 "C1 with MDO profiling (tier 3) invocation notification " \ 3305 "frequency.") \ 3306 \ 3307 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3308 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3309 \ 3310 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3311 "Interpreter (tier 0) invocation notification frequency.") \ 3312 \ 3313 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3314 "C1 without MDO (tier 2) invocation notification frequency.") \ 3315 \ 3316 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3317 "C1 with MDO profiling (tier 3) invocation notification " \ 3318 "frequency.") \ 3319 \ 3320 product(intx, Tier2CompileThreshold, 0, \ 3321 "threshold at which tier 2 compilation is invoked") \ 3322 \ 3323 product(intx, Tier2BackEdgeThreshold, 0, \ 3324 "Back edge threshold at which tier 2 compilation is invoked") \ 3325 \ 3326 product(intx, Tier3InvocationThreshold, 200, \ 3327 "Compile if number of method invocations crosses this " \ 3328 "threshold") \ 3329 \ 3330 product(intx, Tier3MinInvocationThreshold, 100, \ 3331 "Minimum invocation to compile at tier 3") \ 3332 \ 3333 product(intx, Tier3CompileThreshold, 2000, \ 3334 "Threshold at which tier 3 compilation is invoked (invocation " \ 3335 "minimum must be satisfied.") \ 3336 \ 3337 product(intx, Tier3BackEdgeThreshold, 60000, \ 3338 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3339 \ 3340 product(intx, Tier4InvocationThreshold, 5000, \ 3341 "Compile if number of method invocations crosses this " \ 3342 "threshold") \ 3343 \ 3344 product(intx, Tier4MinInvocationThreshold, 600, \ 3345 "Minimum invocation to compile at tier 4") \ 3346 \ 3347 product(intx, Tier4CompileThreshold, 15000, \ 3348 "Threshold at which tier 4 compilation is invoked (invocation " \ 3349 "minimum must be satisfied.") \ 3350 \ 3351 product(intx, Tier4BackEdgeThreshold, 40000, \ 3352 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3353 \ 3354 product(intx, Tier3DelayOn, 5, \ 3355 "If C2 queue size grows over this amount per compiler thread " \ 3356 "stop compiling at tier 3 and start compiling at tier 2") \ 3357 \ 3358 product(intx, Tier3DelayOff, 2, \ 3359 "If C2 queue size is less than this amount per compiler thread " \ 3360 "allow methods compiled at tier 2 transition to tier 3") \ 3361 \ 3362 product(intx, Tier3LoadFeedback, 5, \ 3363 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3364 "reaches this amount per compiler thread") \ 3365 \ 3366 product(intx, Tier4LoadFeedback, 3, \ 3367 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3368 "reaches this amount per compiler thread") \ 3369 \ 3370 product(intx, TieredCompileTaskTimeout, 50, \ 3371 "Kill compile task if method was not used within " \ 3372 "given timeout in milliseconds") \ 3373 \ 3374 product(intx, TieredStopAtLevel, 4, \ 3375 "Stop at given compilation level") \ 3376 \ 3377 product(intx, Tier0ProfilingStartPercentage, 200, \ 3378 "Start profiling in interpreter if the counters exceed tier 3" \ 3379 "thresholds by the specified percentage") \ 3380 \ 3381 product(intx, TieredRateUpdateMinTime, 1, \ 3382 "Minimum rate sampling interval (in milliseconds)") \ 3383 \ 3384 product(intx, TieredRateUpdateMaxTime, 25, \ 3385 "Maximum rate sampling interval (in milliseconds)") \ 3386 \ 3387 product_pd(bool, TieredCompilation, \ 3388 "Enable tiered compilation") \ 3389 \ 3390 product(bool, PrintTieredEvents, false, \ 3391 "Print tiered events notifications") \ 3392 \ 3393 product_pd(intx, OnStackReplacePercentage, \ 3394 "NON_TIERED number of method invocations/branches (expressed as %"\ 3395 "of CompileThreshold) before (re-)compiling OSR code") \ 3396 \ 3397 product(intx, InterpreterProfilePercentage, 33, \ 3398 "NON_TIERED number of method invocations/branches (expressed as %"\ 3399 "of CompileThreshold) before profiling in the interpreter") \ 3400 \ 3401 develop(intx, MaxRecompilationSearchLength, 10, \ 3402 "max. # frames to inspect searching for recompilee") \ 3403 \ 3404 develop(intx, MaxInterpretedSearchLength, 3, \ 3405 "max. # interp. frames to skip when searching for recompilee") \ 3406 \ 3407 develop(intx, DesiredMethodLimit, 8000, \ 3408 "desired max. method size (in bytecodes) after inlining") \ 3409 \ 3410 develop(intx, HugeMethodLimit, 8000, \ 3411 "don't compile methods larger than this if " \ 3412 "+DontCompileHugeMethods") \ 3413 \ 3414 /* New JDK 1.4 reflection implementation */ \ 3415 \ 3416 develop(bool, UseNewReflection, true, \ 3417 "Temporary flag for transition to reflection based on dynamic " \ 3418 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3419 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3420 "changes were needed") \ 3421 \ 3422 develop(bool, VerifyReflectionBytecodes, false, \ 3423 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3424 "in situations like that described in 4486457 or for " \ 3425 "constructors generated for serialization, so can not be enabled "\ 3426 "in product.") \ 3427 \ 3428 product(bool, ReflectionWrapResolutionErrors, true, \ 3429 "Temporary flag for transition to AbstractMethodError wrapped " \ 3430 "in InvocationTargetException. See 6531596") \ 3431 \ 3432 \ 3433 develop(intx, FastSuperclassLimit, 8, \ 3434 "Depth of hardwired instanceof accelerator array") \ 3435 \ 3436 /* Properties for Java libraries */ \ 3437 \ 3438 product(uintx, MaxDirectMemorySize, 0, \ 3439 "Maximum total size of NIO direct-buffer allocations") \ 3440 \ 3441 /* temporary developer defined flags */ \ 3442 \ 3443 diagnostic(bool, UseNewCode, false, \ 3444 "Testing Only: Use the new version while testing") \ 3445 \ 3446 diagnostic(bool, UseNewCode2, false, \ 3447 "Testing Only: Use the new version while testing") \ 3448 \ 3449 diagnostic(bool, UseNewCode3, false, \ 3450 "Testing Only: Use the new version while testing") \ 3451 \ 3452 /* flags for performance data collection */ \ 3453 \ 3454 product(bool, UsePerfData, falseInEmbedded, \ 3455 "Flag to disable jvmstat instrumentation for performance testing" \ 3456 "and problem isolation purposes.") \ 3457 \ 3458 product(bool, PerfDataSaveToFile, false, \ 3459 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3460 \ 3461 product(ccstr, PerfDataSaveFile, NULL, \ 3462 "Save PerfData memory to the specified absolute pathname," \ 3463 "%p in the file name if present will be replaced by pid") \ 3464 \ 3465 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3466 "Data sampling interval in milliseconds") \ 3467 \ 3468 develop(bool, PerfTraceDataCreation, false, \ 3469 "Trace creation of Performance Data Entries") \ 3470 \ 3471 develop(bool, PerfTraceMemOps, false, \ 3472 "Trace PerfMemory create/attach/detach calls") \ 3473 \ 3474 product(bool, PerfDisableSharedMem, false, \ 3475 "Store performance data in standard memory") \ 3476 \ 3477 product(intx, PerfDataMemorySize, 32*K, \ 3478 "Size of performance data memory region. Will be rounded " \ 3479 "up to a multiple of the native os page size.") \ 3480 \ 3481 product(intx, PerfMaxStringConstLength, 1024, \ 3482 "Maximum PerfStringConstant string length before truncation") \ 3483 \ 3484 product(bool, PerfAllowAtExitRegistration, false, \ 3485 "Allow registration of atexit() methods") \ 3486 \ 3487 product(bool, PerfBypassFileSystemCheck, false, \ 3488 "Bypass Win32 file system criteria checks (Windows Only)") \ 3489 \ 3490 product(intx, UnguardOnExecutionViolation, 0, \ 3491 "Unguard page and retry on no-execute fault (Win32 only)" \ 3492 "0=off, 1=conservative, 2=aggressive") \ 3493 \ 3494 /* Serviceability Support */ \ 3495 \ 3496 product(bool, ManagementServer, false, \ 3497 "Create JMX Management Server") \ 3498 \ 3499 product(bool, DisableAttachMechanism, false, \ 3500 "Disable mechanism that allows tools to attach to this VM") \ 3501 \ 3502 product(bool, StartAttachListener, false, \ 3503 "Always start Attach Listener at VM startup") \ 3504 \ 3505 manageable(bool, PrintConcurrentLocks, false, \ 3506 "Print java.util.concurrent locks in thread dump") \ 3507 \ 3508 product(bool, TransmitErrorReport, false, \ 3509 "Enable error report transmission on erroneous termination") \ 3510 \ 3511 product(ccstr, ErrorReportServer, NULL, \ 3512 "Override built-in error report server address") \ 3513 \ 3514 /* Shared spaces */ \ 3515 \ 3516 product(bool, UseSharedSpaces, true, \ 3517 "Use shared spaces in the permanent generation") \ 3518 \ 3519 product(bool, RequireSharedSpaces, false, \ 3520 "Require shared spaces in the permanent generation") \ 3521 \ 3522 product(bool, DumpSharedSpaces, false, \ 3523 "Special mode: JVM reads a class list, loads classes, builds " \ 3524 "shared spaces, and dumps the shared spaces to a file to be " \ 3525 "used in future JVM runs.") \ 3526 \ 3527 product(bool, PrintSharedSpaces, false, \ 3528 "Print usage of shared spaces") \ 3529 \ 3530 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3531 "Size of read-write space in permanent generation (in bytes)") \ 3532 \ 3533 product(uintx, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3534 "Size of read-only space in permanent generation (in bytes)") \ 3535 \ 3536 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3537 "Size of the shared data area adjacent to the heap (in bytes)") \ 3538 \ 3539 product(uintx, SharedMiscCodeSize, 120*K, \ 3540 "Size of the shared code area adjacent to the heap (in bytes)") \ 3541 \ 3542 product(uintx, SharedDummyBlockSize, 0, \ 3543 "Size of dummy block used to shift heap addresses (in bytes)") \ 3544 \ 3545 diagnostic(bool, SharedSkipVerify, false, \ 3546 "Skip assert() and verify() which page-in unwanted shared " \ 3547 "objects. ") \ 3548 \ 3549 diagnostic(bool, EnableInvokeDynamic, true, \ 3550 "support JSR 292 (method handles, invokedynamic, " \ 3551 "anonymous classes") \ 3552 \ 3553 diagnostic(bool, PrintMethodHandleStubs, false, \ 3554 "Print generated stub code for method handles") \ 3555 \ 3556 develop(bool, TraceMethodHandles, false, \ 3557 "trace internal method handle operations") \ 3558 \ 3559 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3560 "perform extra checks when constructing method handles") \ 3561 \ 3562 diagnostic(bool, ShowHiddenFrames, false, \ 3563 "show method handle implementation frames (usually hidden)") \ 3564 \ 3565 experimental(bool, TrustFinalNonStaticFields, false, \ 3566 "trust final non-static declarations for constant folding") \ 3567 \ 3568 develop(bool, TraceInvokeDynamic, false, \ 3569 "trace internal invoke dynamic operations") \ 3570 \ 3571 diagnostic(bool, PauseAtStartup, false, \ 3572 "Causes the VM to pause at startup time and wait for the pause " \ 3573 "file to be removed (default: ./vm.paused.<pid>)") \ 3574 \ 3575 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3576 "The file to create and for whose removal to await when pausing " \ 3577 "at startup. (default: ./vm.paused.<pid>)") \ 3578 \ 3579 diagnostic(bool, PauseAtExit, false, \ 3580 "Pause and wait for keypress on exit if a debugger is attached") \ 3581 \ 3582 product(bool, ExtendedDTraceProbes, false, \ 3583 "Enable performance-impacting dtrace probes") \ 3584 \ 3585 product(bool, DTraceMethodProbes, false, \ 3586 "Enable dtrace probes for method-entry and method-exit") \ 3587 \ 3588 product(bool, DTraceAllocProbes, false, \ 3589 "Enable dtrace probes for object allocation") \ 3590 \ 3591 product(bool, DTraceMonitorProbes, false, \ 3592 "Enable dtrace probes for monitor events") \ 3593 \ 3594 product(bool, RelaxAccessControlCheck, false, \ 3595 "Relax the access control checks in the verifier") \ 3596 \ 3597 diagnostic(bool, PrintDTraceDOF, false, \ 3598 "Print the DTrace DOF passed to the system for JSDT probes") \ 3599 \ 3600 product(uintx, StringTableSize, 1009, \ 3601 "Number of buckets in the interned String table") \ 3602 \ 3603 product(bool, UseVMInterruptibleIO, false, \ 3604 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3605 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3606 " of this flag is true for JDK 6 and earlier") \ 3607 \ 3608 diagnostic(bool, WhiteBoxAPI, false, \ 3609 "Enable internal testing APIs") \ 3610 \ 3611 product(bool, PrintGCCause, true, \ 3612 "Include GC cause in GC logging") 3613 3614/* 3615 * Macros for factoring of globals 3616 */ 3617 3618// Interface macros 3619#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3620#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3621#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3622#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3623#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3624#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3625#ifdef PRODUCT 3626#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3627#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3628#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3629#else 3630#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3631#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3632#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3633#endif 3634// Special LP64 flags, product only needed for now. 3635#ifdef _LP64 3636#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3637#else 3638#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3639#endif // _LP64 3640 3641// Implementation macros 3642#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3643#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3644#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3645#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3646#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3647#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3648#ifdef PRODUCT 3649#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3650#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3651#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3652#else 3653#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3654#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3655#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3656#endif 3657#ifdef _LP64 3658#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3659#else 3660#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3661#endif // _LP64 3662 3663RUNTIME_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) 3664 3665RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3666 3667ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG) 3668 3669// Extensions 3670 3671#include "runtime/globals_ext.hpp" 3672 3673#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3674