globals.hpp revision 2828:f9a80a035a4a
11558Srgrimes/* 21558Srgrimes * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 31558Srgrimes * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 41558Srgrimes * 51558Srgrimes * This code is free software; you can redistribute it and/or modify it 61558Srgrimes * under the terms of the GNU General Public License version 2 only, as 71558Srgrimes * published by the Free Software Foundation. 81558Srgrimes * 91558Srgrimes * This code is distributed in the hope that it will be useful, but WITHOUT 101558Srgrimes * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 111558Srgrimes * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 121558Srgrimes * version 2 for more details (a copy is included in the LICENSE file that 131558Srgrimes * accompanied this code). 141558Srgrimes * 151558Srgrimes * You should have received a copy of the GNU General Public License version 161558Srgrimes * 2 along with this work; if not, write to the Free Software Foundation, 171558Srgrimes * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 181558Srgrimes * 191558Srgrimes * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 201558Srgrimes * or visit www.oracle.com if you need additional information or have any 211558Srgrimes * questions. 221558Srgrimes * 231558Srgrimes */ 241558Srgrimes 251558Srgrimes#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 261558Srgrimes#define SHARE_VM_RUNTIME_GLOBALS_HPP 271558Srgrimes 281558Srgrimes#include "utilities/debug.hpp" 291558Srgrimes#ifdef TARGET_ARCH_x86 301558Srgrimes# include "globals_x86.hpp" 311558Srgrimes#endif 321558Srgrimes#ifdef TARGET_ARCH_sparc 331558Srgrimes# include "globals_sparc.hpp" 3437663Scharnier#endif 351558Srgrimes#ifdef TARGET_ARCH_zero 361558Srgrimes# include "globals_zero.hpp" 372999Swollman#endif 381558Srgrimes#ifdef TARGET_ARCH_arm 39105267Scharnier# include "globals_arm.hpp" 401558Srgrimes#endif 4137663Scharnier#ifdef TARGET_ARCH_ppc 42105267Scharnier# include "globals_ppc.hpp" 4337663Scharnier#endif 441558Srgrimes#ifdef TARGET_OS_FAMILY_linux 45105267Scharnier# include "globals_linux.hpp" 46105267Scharnier#endif 47105267Scharnier#ifdef TARGET_OS_FAMILY_solaris 481558Srgrimes# include "globals_solaris.hpp" 491558Srgrimes#endif 5074462Salfred#ifdef TARGET_OS_FAMILY_windows 511558Srgrimes# include "globals_windows.hpp" 521558Srgrimes#endif 5324330Sguido#ifdef TARGET_OS_FAMILY_bsd 5496622Siedowse# include "globals_bsd.hpp" 5596622Siedowse#endif 561558Srgrimes#ifdef TARGET_OS_ARCH_linux_x86 571558Srgrimes# include "globals_linux_x86.hpp" 58109363Smbr#endif 591558Srgrimes#ifdef TARGET_OS_ARCH_linux_sparc 6074462Salfred# include "globals_linux_sparc.hpp" 6174462Salfred#endif 621558Srgrimes#ifdef TARGET_OS_ARCH_linux_zero 639336Sdfr# include "globals_linux_zero.hpp" 6483653Speter#endif 6523681Speter#ifdef TARGET_OS_ARCH_solaris_x86 6677162Sru# include "globals_solaris_x86.hpp" 6777223Sru#endif 6823681Speter#ifdef TARGET_OS_ARCH_solaris_sparc 691558Srgrimes# include "globals_solaris_sparc.hpp" 701558Srgrimes#endif 711558Srgrimes#ifdef TARGET_OS_ARCH_windows_x86 721558Srgrimes# include "globals_windows_x86.hpp" 7337663Scharnier#endif 741558Srgrimes#ifdef TARGET_OS_ARCH_linux_arm 751558Srgrimes# include "globals_linux_arm.hpp" 76149433Spjd#endif 77103949Smike#ifdef TARGET_OS_ARCH_linux_ppc 781558Srgrimes# include "globals_linux_ppc.hpp" 791558Srgrimes#endif 801558Srgrimes#ifdef TARGET_OS_ARCH_bsd_x86 811558Srgrimes# include "globals_bsd_x86.hpp" 821558Srgrimes#endif 831558Srgrimes#ifdef TARGET_OS_ARCH_bsd_zero 841558Srgrimes# include "globals_bsd_zero.hpp" 851558Srgrimes#endif 861558Srgrimes#ifdef COMPILER1 871558Srgrimes#ifdef TARGET_ARCH_x86 881558Srgrimes# include "c1_globals_x86.hpp" 891558Srgrimes#endif 901558Srgrimes#ifdef TARGET_ARCH_sparc 911558Srgrimes# include "c1_globals_sparc.hpp" 921558Srgrimes#endif 931558Srgrimes#ifdef TARGET_ARCH_arm 941558Srgrimes# include "c1_globals_arm.hpp" 951558Srgrimes#endif 961558Srgrimes#ifdef TARGET_ARCH_ppc 971558Srgrimes# include "c1_globals_ppc.hpp" 981558Srgrimes#endif 991558Srgrimes#ifdef TARGET_OS_FAMILY_linux 1001558Srgrimes# include "c1_globals_linux.hpp" 1011558Srgrimes#endif 1021558Srgrimes#ifdef TARGET_OS_FAMILY_solaris 1031558Srgrimes# include "c1_globals_solaris.hpp" 1041558Srgrimes#endif 1051558Srgrimes#ifdef TARGET_OS_FAMILY_windows 1061558Srgrimes# include "c1_globals_windows.hpp" 1071558Srgrimes#endif 1081558Srgrimes#ifdef TARGET_OS_FAMILY_bsd 1099336Sdfr# include "c1_globals_bsd.hpp" 1101558Srgrimes#endif 1111558Srgrimes#endif 1121558Srgrimes#ifdef COMPILER2 1131558Srgrimes#ifdef TARGET_ARCH_x86 1141558Srgrimes# include "c2_globals_x86.hpp" 1151558Srgrimes#endif 1161558Srgrimes#ifdef TARGET_ARCH_sparc 1171558Srgrimes# include "c2_globals_sparc.hpp" 11827447Sdfr#endif 1191558Srgrimes#ifdef TARGET_ARCH_arm 1201558Srgrimes# include "c2_globals_arm.hpp" 1211558Srgrimes#endif 1221558Srgrimes#ifdef TARGET_OS_FAMILY_linux 1231558Srgrimes# include "c2_globals_linux.hpp" 12474462Salfred#endif 12575801Siedowse#ifdef TARGET_OS_FAMILY_solaris 12642144Sdfr# include "c2_globals_solaris.hpp" 1271558Srgrimes#endif 1281558Srgrimes#ifdef TARGET_OS_FAMILY_windows 1291558Srgrimes# include "c2_globals_windows.hpp" 13074462Salfred#endif 1311558Srgrimes#ifdef TARGET_OS_FAMILY_bsd 1321558Srgrimes# include "c2_globals_bsd.hpp" 1331558Srgrimes#endif 1341558Srgrimes#endif 1351558Srgrimes#ifdef SHARK 1361558Srgrimes#ifdef TARGET_ARCH_zero 1371558Srgrimes# include "shark_globals_zero.hpp" 1381558Srgrimes#endif 1391558Srgrimes#endif 1401558Srgrimes 1411558Srgrimes#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 1421558Srgrimesdefine_pd_global(bool, BackgroundCompilation, false); 14375641Siedowsedefine_pd_global(bool, UseTLAB, false); 1447401Swpauldefine_pd_global(bool, CICompileOSR, false); 1451558Srgrimesdefine_pd_global(bool, UseTypeProfile, false); 1461558Srgrimesdefine_pd_global(bool, UseOnStackReplacement, false); 1479336Sdfrdefine_pd_global(bool, InlineIntrinsics, false); 1481558Srgrimesdefine_pd_global(bool, PreferInterpreterNativeStubs, true); 1491558Srgrimesdefine_pd_global(bool, ProfileInterpreter, false); 1501558Srgrimesdefine_pd_global(bool, ProfileTraps, false); 1511558Srgrimesdefine_pd_global(bool, TieredCompilation, false); 1529336Sdfr 1539336Sdfrdefine_pd_global(intx, CompileThreshold, 0); 1549336Sdfrdefine_pd_global(intx, BackEdgeThreshold, 0); 1559336Sdfr 1569336Sdfrdefine_pd_global(intx, OnStackReplacePercentage, 0); 1579336Sdfrdefine_pd_global(bool, ResizeTLAB, false); 1581558Srgrimesdefine_pd_global(intx, FreqInlineSize, 0); 15992882Simpdefine_pd_global(intx, InlineSmallCode, 0); 16092882Simpdefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 16192882Simpdefine_pd_global(intx, InlineClassNatives, true); 16292882Simpdefine_pd_global(intx, InlineUnsafeOps, true); 16392882Simpdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 16492882Simpdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 16575801Siedowsedefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 16692882Simpdefine_pd_global(intx, CodeCacheMinBlockLength, 1); 16775635Siedowsedefine_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); 16892882Simpdefine_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); 16992882Simpdefine_pd_global(bool, NeverActAsServerClassMachine, true); 17092882Simpdefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 17192882Simp#define CI_COMPILER_COUNT 0 17292882Simp#else 17392882Simp 17492882Simp#ifdef COMPILER2 17592882Simp#define CI_COMPILER_COUNT 2 17692882Simp#else 17792882Simp#define CI_COMPILER_COUNT 1 17892882Simp#endif // COMPILER2 17992882Simp 18092882Simp#endif // no compilers 18192882Simp 18292882Simp 18392882Simp// string type aliases used only in this file 18492882Simptypedef const char* ccstr; 18592882Simptypedef const char* ccstrlist; // represents string arguments which accumulate 18692882Simp 18792882Simpenum FlagValueOrigin { 18892882Simp DEFAULT = 0, 18975754Siedowse COMMAND_LINE = 1, 19075801Siedowse ENVIRON_VAR = 2, 19192882Simp CONFIG_FILE = 3, 19292882Simp MANAGEMENT = 4, 19392882Simp ERGONOMIC = 5, 19492882Simp ATTACH_ON_DEMAND = 6, 195100117Salfred INTERNAL = 99 19675801Siedowse}; 19775801Siedowse 19875801Siedowsestruct Flag { 19992882Simp const char *type; 20092882Simp const char *name; 20192882Simp void* addr; 20292882Simp 203100117Salfred NOT_PRODUCT(const char *doc;) 20492882Simp 20592882Simp const char *kind; 20692882Simp FlagValueOrigin origin; 2071558Srgrimes 2081558Srgrimes // points to all Flags static array 2091558Srgrimes static Flag *flags; 2101558Srgrimes 2111558Srgrimes // number of flags 21272650Sgreen static size_t numFlags; 21391354Sdd 21472650Sgreen static Flag* find_flag(char* name, size_t length); 2151558Srgrimes 21672650Sgreen bool is_bool() const { return strcmp(type, "bool") == 0; } 21772650Sgreen bool get_bool() const { return *((bool*) addr); } 2181558Srgrimes void set_bool(bool value) { *((bool*) addr) = value; } 21925087Sdfr 2209336Sdfr bool is_intx() const { return strcmp(type, "intx") == 0; } 2219336Sdfr intx get_intx() const { return *((intx*) addr); } 222121767Speter void set_intx(intx value) { *((intx*) addr) = value; } 22375754Siedowse 22474462Salfred bool is_uintx() const { return strcmp(type, "uintx") == 0; } 2251558Srgrimes uintx get_uintx() const { return *((uintx*) addr); } 22674462Salfred void set_uintx(uintx value) { *((uintx*) addr) = value; } 22774462Salfred 228149433Spjd bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 22975801Siedowse uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 2301558Srgrimes void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 2311558Srgrimes 23283653Speter bool is_double() const { return strcmp(type, "double") == 0; } 2331558Srgrimes double get_double() const { return *((double*) addr); } 2341558Srgrimes void set_double(double value) { *((double*) addr) = value; } 2351558Srgrimes 23675801Siedowse bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 237100336Sjoerg bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 23874462Salfred ccstr get_ccstr() const { return *((ccstr*) addr); } 2391558Srgrimes void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 2401558Srgrimes 2411558Srgrimes bool is_unlocker() const; 24292882Simp bool is_unlocked() const; 2431558Srgrimes bool is_writeable() const; 2441558Srgrimes bool is_external() const; 2451558Srgrimes 2461558Srgrimes void print_on(outputStream* st, bool withComments = false ); 2471558Srgrimes void print_as_flag(outputStream* st); 2481558Srgrimes}; 2491558Srgrimes 2501558Srgrimes// debug flags control various aspects of the VM and are global accessible 2511558Srgrimes 2521558Srgrimes// use FlagSetting to temporarily change some debug flag 2531558Srgrimes// e.g. FlagSetting fs(DebugThisAndThat, true); 2541558Srgrimes// restored to previous value upon leaving scope 2551558Srgrimesclass FlagSetting { 2561558Srgrimes bool val; 2571558Srgrimes bool* flag; 2581558Srgrimes public: 2591558Srgrimes FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 26075754Siedowse ~FlagSetting() { *flag = val; } 261126572Sbms}; 262126572Sbms 263126572Sbms 26474462Salfredclass CounterSetting { 26574462Salfred intx* counter; 266149433Spjd public: 26774462Salfred CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 26874462Salfred ~CounterSetting() { (*counter)--; } 269109363Smbr}; 27074462Salfred 271126572Sbms 272126572Sbmsclass IntFlagSetting { 2731558Srgrimes intx val; 27475635Siedowse intx* flag; 275126643Smarkm public: 27675635Siedowse IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 27774462Salfred ~IntFlagSetting() { *flag = val; } 278150214Spjd}; 279149433Spjd 280149433Spjd 281149433Spjdclass DoubleFlagSetting { 282149433Spjd double val; 283149433Spjd double* flag; 28474462Salfred public: 28574462Salfred DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 28674462Salfred ~DoubleFlagSetting() { *flag = val; } 28774462Salfred}; 28874462Salfred 28974462Salfred 29083687Speterclass CommandLineFlags { 29183687Speter public: 29283687Speter static bool boolAt(char* name, size_t len, bool* value); 29383687Speter static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 2942999Swollman static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 2952999Swollman static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 296126572Sbms 2971558Srgrimes static bool intxAt(char* name, size_t len, intx* value); 29825087Sdfr static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 29925087Sdfr static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 30025087Sdfr static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 3019336Sdfr 3029336Sdfr static bool uintxAt(char* name, size_t len, uintx* value); 3039336Sdfr static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 3049336Sdfr static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 3059336Sdfr static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 3069336Sdfr 3078688Sphk static bool uint64_tAt(char* name, size_t len, uint64_t* value); 3088688Sphk static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 3098688Sphk static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 31031656Sguido static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 311121767Speter 31231656Sguido static bool doubleAt(char* name, size_t len, double* value); 313126572Sbms static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 314126572Sbms static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 315126572Sbms static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 316126572Sbms 317126572Sbms static bool ccstrAt(char* name, size_t len, ccstr* value); 318126572Sbms static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 319126572Sbms static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 3201558Srgrimes static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 32137663Scharnier 3221558Srgrimes // Returns false if name is not a command line flag. 3231558Srgrimes static bool wasSetOnCmdline(const char* name, bool* value); 3241558Srgrimes static void printSetFlags(); 3251558Srgrimes 3261558Srgrimes static void printFlags(bool withComments = false ); 3271558Srgrimes 3281558Srgrimes static void verify() PRODUCT_RETURN; 3291558Srgrimes}; 3301558Srgrimes 3311558Srgrimes// use this for flags that are true by default in the debug version but 3321558Srgrimes// false in the optimized version, and vice versa 3331558Srgrimes#ifdef ASSERT 3341558Srgrimes#define trueInDebug true 33537663Scharnier#define falseInDebug false 3361558Srgrimes#else 3371558Srgrimes#define trueInDebug false 33837663Scharnier#define falseInDebug true 3391558Srgrimes#endif 3401558Srgrimes 34137663Scharnier// use this for flags that are true per default in the product build 3421558Srgrimes// but false in development builds, and vice versa 3431558Srgrimes#ifdef PRODUCT 3441558Srgrimes#define trueInProduct true 3451558Srgrimes#define falseInProduct false 3461558Srgrimes#else 34775754Siedowse#define trueInProduct false 34874462Salfred#define falseInProduct true 349149433Spjd#endif 350149433Spjd 351149433Spjd// use this for flags that are true per default in the tiered build 35274462Salfred// but false in non-tiered builds, and vice versa 35374462Salfred#ifdef TIERED 35474462Salfred#define trueInTiered true 35574462Salfred#define falseInTiered false 35674791Salfred#else 35774791Salfred#define trueInTiered false 358109363Smbr#define falseInTiered true 359109363Smbr#endif 360109363Smbr 36174791Salfred#ifdef JAVASE_EMBEDDED 36274791Salfred#define falseInEmbedded false 36374462Salfred#else 36474462Salfred#define falseInEmbedded true 36574462Salfred#endif 36674462Salfred 36774462Salfred// develop flags are settable / visible only during development and are constant in the PRODUCT version 36874462Salfred// product flags are always settable / visible 36974462Salfred// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 37074462Salfred 371117684Srwatson// A flag must be declared with one of the following types: 37274462Salfred// bool, intx, uintx, ccstr. 37374462Salfred// The type "ccstr" is an alias for "const char*" and is used 37474462Salfred// only in this file, because the macrology requires single-token type names. 37574462Salfred 376117684Srwatson// Note: Diagnostic options not meant for VM tuning or for product modes. 377117684Srwatson// They are to be used for VM quality assurance or field diagnosis 37874462Salfred// of VM bugs. They are hidden so that users will not be encouraged to 37974462Salfred// try them as if they were VM ordinary execution options. However, they 38074462Salfred// are available in the product version of the VM. Under instruction 38174462Salfred// from support engineers, VM customers can turn them on to collect 38274791Salfred// diagnostic information about VM problems. To use a VM diagnostic 38374791Salfred// option, you must first specify +UnlockDiagnosticVMOptions. 38424759Sguido// (This master switch also affects the behavior of -Xprintflags.) 38583687Speter// 38683687Speter// experimental flags are in support of features that are not 38783687Speter// part of the officially supported product, but are available 38824759Sguido// for experimenting with. They could, for example, be performance 38924759Sguido// features that may not have undergone full or rigorous QA, but which may 39024759Sguido// help performance in some cases and released for experimentation 39124330Sguido// by the community of users and developers. This flag also allows one to 392126572Sbms// be able to build a fully supported product that nonetheless also 393126572Sbms// ships with some unsupported, lightly tested, experimental features. 394126572Sbms// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 395126572Sbms// UnlockExperimentalVMOptions flag, which allows the control and 396126572Sbms// modification of the experimental flags. 397126572Sbms// 398126572Sbms// Nota bene: neither diagnostic nor experimental options should be used casually, 399126572Sbms// and they are not supported on production loads, except under explicit 400126572Sbms// direction from support engineers. 401126572Sbms// 402126572Sbms// manageable flags are writeable external product flags. 40374462Salfred// They are dynamically writeable through the JDK management interface 404126572Sbms// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 405126572Sbms// These flags are external exported interface (see CCC). The list of 406126572Sbms// manageable flags can be queried programmatically through the management 407126572Sbms// interface. 408126572Sbms// 409126572Sbms// A flag can be made as "manageable" only if 410126572Sbms// - the flag is defined in a CCC as an external exported interface. 411126572Sbms// - the VM implementation supports dynamic setting of the flag. 41274462Salfred// This implies that the VM must *always* query the flag variable 41374462Salfred// and not reuse state related to the flag state at any given time. 41474462Salfred// - you want the flag to be queried programmatically by the customers. 41574462Salfred// 41674462Salfred// product_rw flags are writeable internal product flags. 41774462Salfred// They are like "manageable" flags but for internal/private use. 41874462Salfred// The list of product_rw flags are internal/private flags which 41974462Salfred// may be changed/removed in a future release. It can be set 42074462Salfred// through the management interface to get/set value 42174462Salfred// when the name of flag is supplied. 42274462Salfred// 42374462Salfred// A flag can be made as "product_rw" only if 42474462Salfred// - the VM implementation supports dynamic setting of the flag. 42574462Salfred// This implies that the VM must *always* query the flag variable 42674462Salfred// and not reuse state related to the flag state at any given time. 42774462Salfred// 42874462Salfred// Note that when there is a need to support develop flags to be writeable, 42974462Salfred// it can be done in the same way as product_rw. 43074462Salfred 431126572Sbms#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 432126572Sbms \ 433126572Sbms lp64_product(bool, UseCompressedOops, false, \ 434126572Sbms "Use 32-bit object references in 64-bit VM. " \ 435126572Sbms "lp64_product means flag is always constant in 32 bit VM") \ 436126572Sbms \ 437126572Sbms notproduct(bool, CheckCompressedOops, true, \ 438126572Sbms "generate checks in encoding/decoding code in debug VM") \ 43974462Salfred \ 440109363Smbr product_pd(uintx, HeapBaseMinAddress, \ 44174462Salfred "OS specific low limit for heap base address") \ 44274462Salfred \ 44374462Salfred diagnostic(bool, PrintCompressedOopsMode, false, \ 44474462Salfred "Print compressed oops base address and encoding mode") \ 44574462Salfred \ 44674462Salfred lp64_product(intx, ObjectAlignmentInBytes, 8, \ 44774462Salfred "Default object alignment in bytes, 8 is minimum") \ 44874462Salfred \ 44974462Salfred /* UseMembar is theoretically a temp flag used for memory barrier \ 45074462Salfred * removal testing. It was supposed to be removed before FCS but has \ 45174462Salfred * been re-added (see 6401008) */ \ 45274462Salfred product_pd(bool, UseMembar, \ 45374462Salfred "(Unstable) Issues membars on thread state transitions") \ 45474462Salfred \ 45574462Salfred /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 45674462Salfred * that don't support it. This will be replaced by processor detection \ 45774462Salfred * logic. \ 45874791Salfred */ \ 459126572Sbms product(bool, UsePPCLWSYNC, true, \ 460126572Sbms "Use lwsync instruction if true, else use slower sync") \ 461126572Sbms \ 462126572Sbms develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 463126572Sbms "Whether to clean the chunk pool asynchronously") \ 464126572Sbms \ 465126572Sbms /* Temporary: See 6948537 */ \ 466126572Sbms experimental(bool, UseMemSetInBOT, true, \ 467126572Sbms "(Unstable) uses memset in BOT updates in GC code") \ 46874462Salfred \ 46974462Salfred diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 47074462Salfred "Enable normal processing of flags relating to field diagnostics")\ 47174462Salfred \ 47274462Salfred experimental(bool, UnlockExperimentalVMOptions, false, \ 47374462Salfred "Enable normal processing of flags relating to experimental features")\ 47474462Salfred \ 47574462Salfred product(bool, JavaMonitorsInStackTrace, true, \ 47674462Salfred "Print info. about Java monitor locks when the stacks are dumped")\ 47774462Salfred \ 47874462Salfred product_pd(bool, UseLargePages, \ 47974462Salfred "Use large page memory") \ 48074462Salfred \ 48174462Salfred product_pd(bool, UseLargePagesIndividualAllocation, \ 48274462Salfred "Allocate large pages individually for better affinity") \ 48374462Salfred \ 48474462Salfred develop(bool, LargePagesIndividualAllocationInjectError, false, \ 48574462Salfred "Fail large pages individual allocation") \ 48674791Salfred \ 487126572Sbms develop(bool, TracePageSizes, false, \ 488126572Sbms "Trace page size selection and usage.") \ 489126572Sbms \ 490126572Sbms product(bool, UseNUMA, false, \ 491126572Sbms "Use NUMA if available") \ 492126572Sbms \ 493126572Sbms product(bool, UseNUMAInterleaving, false, \ 494126572Sbms "Interleave memory across NUMA nodes if available") \ 495126572Sbms \ 49674462Salfred product(uintx, NUMAInterleaveGranularity, 2*M, \ 497109363Smbr "Granularity to use for NUMA interleaving on Windows OS") \ 49874462Salfred \ 49974462Salfred product(bool, ForceNUMA, false, \ 50074462Salfred "Force NUMA optimizations on single-node/UMA systems") \ 50174462Salfred \ 50274462Salfred product(intx, NUMAChunkResizeWeight, 20, \ 50374462Salfred "Percentage (0-100) used to weight the current sample when " \ 50474462Salfred "computing exponentially decaying average for " \ 50574462Salfred "AdaptiveNUMAChunkSizing") \ 50674462Salfred \ 50774462Salfred product(intx, NUMASpaceResizeRate, 1*G, \ 50874462Salfred "Do not reallocate more that this amount per collection") \ 50974462Salfred \ 51074462Salfred product(bool, UseAdaptiveNUMAChunkSizing, true, \ 51174462Salfred "Enable adaptive chunk sizing for NUMA") \ 51274462Salfred \ 51374462Salfred product(bool, NUMAStats, false, \ 51474462Salfred "Print NUMA stats in detailed heap information") \ 51574462Salfred \ 51674462Salfred product(intx, NUMAPageScanRate, 256, \ 5171558Srgrimes "Maximum number of pages to include in the page scan procedure") \ 5181558Srgrimes \ 51975754Siedowse product_pd(bool, NeedsDeoptSuspend, \ 52075754Siedowse "True for register window machines (sparc/ia64)") \ 52175754Siedowse \ 52275754Siedowse product(intx, UseSSE, 99, \ 52375754Siedowse "Highest supported SSE instructions set on x86/x64") \ 52475754Siedowse \ 52575754Siedowse product(intx, UseVIS, 99, \ 52675754Siedowse "Highest supported VIS instructions set on Sparc") \ 52775754Siedowse \ 52875754Siedowse product(uintx, LargePageSizeInBytes, 0, \ 52975754Siedowse "Large page size (0 to let VM choose the page size") \ 53075754Siedowse \ 53175754Siedowse product(uintx, LargePageHeapSizeThreshold, 128*M, \ 53275754Siedowse "Use large pages if max heap is at least this big") \ 53375754Siedowse \ 53475754Siedowse product(bool, ForceTimeHighResolution, false, \ 53575754Siedowse "Using high time resolution(For Win32 only)") \ 53675754Siedowse \ 53775754Siedowse develop(bool, TraceItables, false, \ 53875754Siedowse "Trace initialization and use of itables") \ 5391558Srgrimes \ 5401558Srgrimes develop(bool, TracePcPatching, false, \ 54137663Scharnier "Trace usage of frame::patch_pc") \ 54237663Scharnier \ 54337663Scharnier develop(bool, TraceJumps, false, \ 54437663Scharnier "Trace assembly jumps in thread ring buffer") \ 545126572Sbms \ 546126572Sbms develop(bool, TraceRelocator, false, \ 54737663Scharnier "Trace the bytecode relocator") \ 54837663Scharnier \ 54937663Scharnier develop(bool, TraceLongCompiles, false, \ 5501558Srgrimes "Print out every time compilation is longer than " \ 5511558Srgrimes "a given threashold") \ 5521558Srgrimes \ 5531558Srgrimes develop(bool, SafepointALot, false, \ 5541558Srgrimes "Generates a lot of safepoints. Works with " \ 5551558Srgrimes "GuaranteedSafepointInterval") \ 5561558Srgrimes \ 5571558Srgrimes product_pd(bool, BackgroundCompilation, \ 5581558Srgrimes "A thread requesting compilation is not blocked during " \ 5591558Srgrimes "compilation") \ 5609336Sdfr \ 5611558Srgrimes product(bool, PrintVMQWaitTime, false, \ 5621558Srgrimes "Prints out the waiting time in VM operation queue") \ 56374462Salfred \ 56474462Salfred develop(bool, BailoutToInterpreterForThrows, false, \ 56574462Salfred "Compiled methods which throws/catches exceptions will be " \ 5669336Sdfr "deopt and intp.") \ 56723681Speter \ 56828911Sguido develop(bool, NoYieldsInMicrolock, false, \ 5699336Sdfr "Disable yields in microlock") \ 5701558Srgrimes \ 5719336Sdfr develop(bool, TraceOopMapGeneration, false, \ 5729336Sdfr "Shows oopmap generation") \ 57374462Salfred \ 57474462Salfred product(bool, MethodFlushing, true, \ 57574462Salfred "Reclamation of zombie and not-entrant methods") \ 57675635Siedowse \ 57774462Salfred develop(bool, VerifyStack, false, \ 57874462Salfred "Verify stack of each thread when it is entering a runtime call") \ 57975635Siedowse \ 58074462Salfred diagnostic(bool, ForceUnreachable, false, \ 58174462Salfred "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 58274462Salfred \ 58374462Salfred notproduct(bool, StressDerivedPointers, false, \ 58474462Salfred "Force scavenge when a derived pointers is detected on stack " \ 58574462Salfred "after rtm call") \ 58674462Salfred \ 58774462Salfred develop(bool, TraceDerivedPointers, false, \ 58874462Salfred "Trace traversal of derived pointers on stack") \ 5891558Srgrimes \ 5901558Srgrimes notproduct(bool, TraceCodeBlobStacks, false, \ 591121556Speter "Trace stack-walk of codeblobs") \ 59237663Scharnier \ 5931558Srgrimes product(bool, PrintJNIResolving, false, \ 5941558Srgrimes "Used to implement -v:jni") \ 5959336Sdfr \ 59631656Sguido notproduct(bool, PrintRewrites, false, \ 59731656Sguido "Print methods that are being rewritten") \ 59874462Salfred \ 5991558Srgrimes product(bool, UseInlineCaches, true, \ 6001558Srgrimes "Use Inline Caches for virtual calls ") \ 6011558Srgrimes \ 602121556Speter develop(bool, InlineArrayCopy, true, \ 60331656Sguido "inline arraycopy native that is known to be part of " \ 60474462Salfred "base library DLL") \ 6051558Srgrimes \ 6061558Srgrimes develop(bool, InlineObjectHash, true, \ 6071558Srgrimes "inline Object::hashCode() native that is known to be part " \ 6081558Srgrimes "of base library DLL") \ 6091558Srgrimes \ 6101558Srgrimes develop(bool, InlineObjectCopy, true, \ 6119336Sdfr "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 6129336Sdfr \ 6131558Srgrimes develop(bool, InlineNatives, true, \ 61451968Salfred "inline natives that are known to be part of base library DLL") \ 6151558Srgrimes \ 6169336Sdfr develop(bool, InlineMathNatives, true, \ 61774462Salfred "inline SinD, CosD, etc.") \ 6181558Srgrimes \ 6191558Srgrimes develop(bool, InlineClassNatives, true, \ 62031656Sguido "inline Class.isInstance, etc") \ 62137663Scharnier \ 62274462Salfred develop(bool, InlineAtomicLong, true, \ 6231558Srgrimes "inline sun.misc.AtomicLong") \ 62437663Scharnier \ 62528911Sguido develop(bool, InlineThreadNatives, true, \ 6261558Srgrimes "inline Thread.currentThread, etc") \ 6271558Srgrimes \ 6281558Srgrimes develop(bool, InlineReflectionGetCallerClass, true, \ 6299336Sdfr "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 6301558Srgrimes "of base library DLL") \ 6319336Sdfr \ 6329336Sdfr develop(bool, InlineUnsafeOps, true, \ 6331558Srgrimes "inline memory ops (native methods) from sun.misc.Unsafe") \ 63474462Salfred \ 63574462Salfred develop(bool, ConvertCmpD2CmpF, true, \ 63674462Salfred "Convert cmpD to cmpF when one input is constant in float range") \ 63728911Sguido \ 638121556Speter develop(bool, ConvertFloat2IntClipping, true, \ 63928911Sguido "Convert float2int clipping idiom to integer clipping") \ 64037663Scharnier \ 64128911Sguido develop(bool, SpecialStringCompareTo, true, \ 64228911Sguido "special version of string compareTo") \ 64328911Sguido \ 6449336Sdfr develop(bool, SpecialStringIndexOf, true, \ 6459336Sdfr "special version of string indexOf") \ 6469336Sdfr \ 6479336Sdfr develop(bool, SpecialStringEquals, true, \ 6489336Sdfr "special version of string equals") \ 6491558Srgrimes \ 65023681Speter develop(bool, SpecialArraysEquals, true, \ 6519336Sdfr "special version of Arrays.equals(char[],char[])") \ 6521558Srgrimes \ 65337663Scharnier product(bool, UseSSE42Intrinsics, false, \ 654121556Speter "SSE4.2 versions of intrinsics") \ 6551558Srgrimes \ 65637663Scharnier product(bool, UseCondCardMark, false, \ 6579336Sdfr "Check for already marked card before updating card table") \ 6581558Srgrimes \ 6591558Srgrimes develop(bool, TraceCallFixup, false, \ 660121556Speter "traces all call fixups") \ 661121556Speter \ 66237663Scharnier develop(bool, DeoptimizeALot, false, \ 66374462Salfred "deoptimize at every exit from the runtime system") \ 66474462Salfred \ 6651558Srgrimes notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 66674462Salfred "a comma separated list of bcis to deoptimize at") \ 6671558Srgrimes \ 66837663Scharnier product(bool, DeoptimizeRandom, false, \ 669121767Speter "deoptimize random frames on random exit from the runtime system")\ 67031656Sguido \ 67131656Sguido notproduct(bool, ZombieALot, false, \ 67274462Salfred "creates zombies (non-entrant) at exit from the runt. system") \ 67331656Sguido \ 6741558Srgrimes product(bool, UnlinkSymbolsALot, false, \ 67531656Sguido "unlink unreferenced symbols from the symbol table at safepoints")\ 67631656Sguido \ 67774462Salfred notproduct(bool, WalkStackALot, false, \ 67831656Sguido "trace stack (no print) at every exit from the runtime system") \ 67928911Sguido \ 680121556Speter product(bool, Debugging, false, \ 681121556Speter "set when executing debug methods in debug.ccp " \ 68237663Scharnier "(to prevent triggering assertions)") \ 6839336Sdfr \ 6841558Srgrimes notproduct(bool, StrictSafepointChecks, trueInDebug, \ 6851558Srgrimes "Enable strict checks that safepoints cannot happen for threads " \ 686121556Speter "that used No_Safepoint_Verifier") \ 68737663Scharnier \ 688121767Speter notproduct(bool, VerifyLastFrame, false, \ 68931656Sguido "Verify oops on last frame on entry to VM") \ 69031656Sguido \ 69174462Salfred develop(bool, TraceHandleAllocation, false, \ 6921558Srgrimes "Prints out warnings when suspicious many handles are allocated") \ 6931558Srgrimes \ 6949336Sdfr product(bool, UseCompilerSafepoints, true, \ 69531656Sguido "Stop at safepoints in compiled code") \ 69631656Sguido \ 69774462Salfred product(bool, UseSplitVerifier, true, \ 6981558Srgrimes "use split verifier with StackMapTable attributes") \ 6991558Srgrimes \ 7001558Srgrimes product(bool, FailOverToOldVerifier, true, \ 701121556Speter "fail over to old verifier when split verifier fails") \ 70231656Sguido \ 70374462Salfred develop(bool, ShowSafepointMsgs, false, \ 7041558Srgrimes "Show msg. about safepoint synch.") \ 7051558Srgrimes \ 7061558Srgrimes product(bool, SafepointTimeout, false, \ 70751968Salfred "Time out and warn or fail after SafepointTimeoutDelay " \ 70851968Salfred "milliseconds if failed to reach safepoint") \ 70951968Salfred \ 71074462Salfred develop(bool, DieOnSafepointTimeout, false, \ 71151968Salfred "Die upon failure to reach safepoint (see SafepointTimeout)") \ 712121556Speter \ 71337663Scharnier /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 71474462Salfred /* typically, at most a few retries are needed */ \ 71575635Siedowse product(intx, SuspendRetryCount, 50, \ 71675635Siedowse "Maximum retry count for an external suspend request") \ 717121767Speter \ 71831656Sguido product(intx, SuspendRetryDelay, 5, \ 71931656Sguido "Milliseconds to delay per retry (* current_retry_count)") \ 72074462Salfred \ 7211558Srgrimes product(bool, AssertOnSuspendWaitFailure, false, \ 7221558Srgrimes "Assert/Guarantee on external suspend wait failure") \ 7239336Sdfr \ 72431656Sguido product(bool, TraceSuspendWaitFailures, false, \ 72531656Sguido "Trace external suspend wait failures") \ 72674462Salfred \ 7271558Srgrimes product(bool, MaxFDLimit, true, \ 7281558Srgrimes "Bump the number of file descriptors to max in solaris.") \ 7291558Srgrimes \ 730121556Speter notproduct(bool, LogEvents, trueInDebug, \ 73137663Scharnier "Enable Event log") \ 73274462Salfred \ 73375635Siedowse product(bool, BytecodeVerificationRemote, true, \ 73475635Siedowse "Enables the Java bytecode verifier for remote classes") \ 735121767Speter \ 73631656Sguido product(bool, BytecodeVerificationLocal, false, \ 73731656Sguido "Enables the Java bytecode verifier for local classes") \ 73874462Salfred \ 7391558Srgrimes develop(bool, ForceFloatExceptions, trueInDebug, \ 7401558Srgrimes "Force exceptions on FP stack under/overflow") \ 741121556Speter \ 742121556Speter develop(bool, SoftMatchFailure, trueInProduct, \ 743121556Speter "If the DFA fails to match a node, print a message and bail out") \ 744100117Salfred \ 745121767Speter develop(bool, VerifyStackAtCalls, false, \ 74631656Sguido "Verify that the stack pointer is unchanged after calls") \ 74731656Sguido \ 74874462Salfred develop(bool, TraceJavaAssertions, false, \ 7491558Srgrimes "Trace java language assertions") \ 7501558Srgrimes \ 7511558Srgrimes notproduct(bool, CheckAssertionStatusDirectives, false, \ 7521558Srgrimes "temporary - see javaClasses.cpp") \ 7531558Srgrimes \ 7541558Srgrimes notproduct(bool, PrintMallocFree, false, \ 7551558Srgrimes "Trace calls to C heap malloc/free allocation") \ 7561558Srgrimes \ 7571558Srgrimes product(bool, PrintOopAddress, false, \ 7581558Srgrimes "Always print the location of the oop") \ 7591558Srgrimes \ 7601558Srgrimes notproduct(bool, VerifyCodeCacheOften, false, \ 7611558Srgrimes "Verify compiled-code cache often") \ 7621558Srgrimes \ 7631558Srgrimes develop(bool, ZapDeadCompiledLocals, false, \ 7641558Srgrimes "Zap dead locals in compiler frames") \ 7651558Srgrimes \ 7661558Srgrimes notproduct(bool, ZapDeadLocalsOld, false, \ 7671558Srgrimes "Zap dead locals (old version, zaps all frames when " \ 7689336Sdfr "entering the VM") \ 7691558Srgrimes \ 7701558Srgrimes notproduct(bool, CheckOopishValues, false, \ 7719336Sdfr "Warn if value contains oop ( requires ZapDeadLocals)") \ 7721558Srgrimes \ 7739336Sdfr develop(bool, UseMallocOnly, false, \ 7741558Srgrimes "use only malloc/free for allocation (no resource area/arena)") \ 77592806Sobrien \ 7769336Sdfr develop(bool, PrintMalloc, false, \ 7771558Srgrimes "print all malloc/free calls") \ 7781558Srgrimes \ 7791558Srgrimes develop(bool, PrintMallocStatistics, false, \ 7809336Sdfr "print malloc/free statistics") \ 7819336Sdfr \ 7829336Sdfr develop(bool, ZapResourceArea, trueInDebug, \ 7839336Sdfr "Zap freed resource/arena space with 0xABABABAB") \ 7849336Sdfr \ 7859336Sdfr notproduct(bool, ZapVMHandleArea, trueInDebug, \ 7869336Sdfr "Zap freed VM handle space with 0xBCBCBCBC") \ 7879336Sdfr \ 7889336Sdfr develop(bool, ZapJNIHandleArea, trueInDebug, \ 78983653Speter "Zap freed JNI handle space with 0xFEFEFEFE") \ 7909336Sdfr \ 7919336Sdfr notproduct(bool, ZapStackSegments, trueInDebug, \ 7929336Sdfr "Zap allocated/freed Stack segments with 0xFADFADED") \ 7939336Sdfr \ 7949336Sdfr develop(bool, ZapUnusedHeapArea, trueInDebug, \ 7959336Sdfr "Zap unused heap space with 0xBAADBABE") \ 7961558Srgrimes \ 7971558Srgrimes develop(bool, TraceZapUnusedHeapArea, false, \ 7981558Srgrimes "Trace zapping of unused heap space") \ 7991558Srgrimes \ 8001558Srgrimes develop(bool, CheckZapUnusedHeapArea, false, \ 8011558Srgrimes "Check zapping of unused heap space") \ 8021558Srgrimes \ 8031558Srgrimes develop(bool, ZapFillerObjects, trueInDebug, \ 8041558Srgrimes "Zap filler objects with 0xDEAFBABE") \ 8051558Srgrimes \ 8061558Srgrimes develop(bool, PrintVMMessages, true, \ 8071558Srgrimes "Print vm messages on console") \ 8081558Srgrimes \ 8091558Srgrimes product(bool, PrintGCApplicationConcurrentTime, false, \ 8101558Srgrimes "Print the time the application has been running") \ 8111558Srgrimes \ 8121558Srgrimes product(bool, PrintGCApplicationStoppedTime, false, \ 8131558Srgrimes "Print the time the application has been stopped") \ 8141558Srgrimes \ 8151558Srgrimes notproduct(uintx, ErrorHandlerTest, 0, \ 8161558Srgrimes "If > 0, provokes an error after VM initialization; the value" \ 8171558Srgrimes "determines which error to provoke. See test_error_handler()" \ 8181558Srgrimes "in debug.cpp.") \ 8191558Srgrimes \ 8201558Srgrimes develop(bool, Verbose, false, \ 8211558Srgrimes "Prints additional debugging information from other modes") \ 8221558Srgrimes \ 8231558Srgrimes develop(bool, PrintMiscellaneous, false, \ 8241558Srgrimes "Prints uncategorized debugging information (requires +Verbose)") \ 8251558Srgrimes \ 8261558Srgrimes develop(bool, WizardMode, false, \ 8271558Srgrimes "Prints much more debugging information") \ 8281558Srgrimes \ 829100117Salfred product(bool, ShowMessageBoxOnError, false, \ 8301558Srgrimes "Keep process alive on VM fatal error") \ 8311558Srgrimes \ 832100117Salfred product(bool, CreateMinidumpOnCrash, false, \ 8331558Srgrimes "Create minidump on VM fatal error") \ 8341558Srgrimes \ 8351558Srgrimes product_pd(bool, UseOSErrorReporting, \ 8369336Sdfr "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 8379336Sdfr \ 8381558Srgrimes product(bool, SuppressFatalErrorMessage, false, \ 8399336Sdfr "Do NO Fatal Error report [Avoid deadlock]") \ 8409336Sdfr \ 8419336Sdfr product(ccstrlist, OnError, "", \ 8421558Srgrimes "Run user-defined commands on fatal error; see VMError.cpp " \ 8431558Srgrimes "for examples") \ 8441558Srgrimes \ 845100117Salfred product(ccstrlist, OnOutOfMemoryError, "", \ 846100117Salfred "Run user-defined commands on first java.lang.OutOfMemoryError") \ 8471558Srgrimes \ 8481558Srgrimes manageable(bool, HeapDumpBeforeFullGC, false, \ 8491558Srgrimes "Dump heap to file before any major stop-world GC") \ 850100117Salfred \ 8511558Srgrimes manageable(bool, HeapDumpAfterFullGC, false, \ 8521558Srgrimes "Dump heap to file after any major stop-world GC") \ 8531558Srgrimes \ 8549336Sdfr manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 8551558Srgrimes "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 8561558Srgrimes \ 8571558Srgrimes manageable(ccstr, HeapDumpPath, NULL, \ 8581558Srgrimes "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 8599336Sdfr "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 8601558Srgrimes "in the working directory)") \ 8611558Srgrimes \ 8621558Srgrimes develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 8631558Srgrimes "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 8641558Srgrimes "when the heap usage is larger than this") \ 8651558Srgrimes \ 8661558Srgrimes develop(uintx, HeapDumpSegmentSize, 1*G, \ 8671558Srgrimes "Approximate segment size when generating a segmented heap dump") \ 868100117Salfred \ 8691558Srgrimes develop(bool, BreakAtWarning, false, \ 8701558Srgrimes "Execute breakpoint upon encountering VM warning") \ 8711558Srgrimes \ 8721558Srgrimes product_pd(bool, UseVectoredExceptions, \ 873100117Salfred "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 8741558Srgrimes \ 8751558Srgrimes develop(bool, TraceVMOperation, false, \ 8761558Srgrimes "Trace vm operations") \ 8771558Srgrimes \ 8781558Srgrimes develop(bool, UseFakeTimers, false, \ 8791558Srgrimes "Tells whether the VM should use system time or a fake timer") \ 8801558Srgrimes \ 8811558Srgrimes diagnostic(bool, LogCompilation, false, \ 8821558Srgrimes "Log compilation activity in detail to hotspot.log or LogFile") \ 883100117Salfred \ 8841558Srgrimes product(bool, PrintCompilation, false, \ 8851558Srgrimes "Print compilations") \ 8861558Srgrimes \ 8871558Srgrimes diagnostic(bool, TraceNMethodInstalls, false, \ 8881558Srgrimes "Trace nmethod intallation") \ 8891558Srgrimes \ 8901558Srgrimes diagnostic(intx, ScavengeRootsInCode, 1, \ 8911558Srgrimes "0: do not allow scavengable oops in the code cache; " \ 8921558Srgrimes "1: allow scavenging from the code cache; " \ 8931558Srgrimes "2: emit as many constants as the compiler can see") \ 894100117Salfred \ 895100117Salfred diagnostic(bool, TraceOSRBreakpoint, false, \ 896100117Salfred "Trace OSR Breakpoint ") \ 897100117Salfred \ 898100117Salfred diagnostic(bool, TraceCompileTriggered, false, \ 899100117Salfred "Trace compile triggered") \ 900100117Salfred \ 9011558Srgrimes diagnostic(bool, TraceTriggers, false, \ 9021558Srgrimes "Trace triggers") \ 9031558Srgrimes \ 9041558Srgrimes product(bool, AlwaysRestoreFPU, false, \ 9051558Srgrimes "Restore the FPU control word after every JNI call (expensive)") \ 9061558Srgrimes \ 9071558Srgrimes diagnostic(bool, PrintCompilation2, false, \ 90874462Salfred "Print additional statistics per compilation") \ 9098871Srgrimes \ 9101558Srgrimes diagnostic(bool, PrintAdapterHandlers, false, \ 9111558Srgrimes "Print code generated for i2c/c2i adapters") \ 9121558Srgrimes \ 9131558Srgrimes develop(bool, VerifyAdapterSharing, false, \ 9141558Srgrimes "Verify that the code for shared adapters is the equivalent") \ 9151558Srgrimes \ 9168871Srgrimes diagnostic(bool, PrintAssembly, false, \ 9171558Srgrimes "Print assembly code (using external disassembler.so)") \ 9181558Srgrimes \ 9191558Srgrimes diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 9201558Srgrimes "Options string passed to disassembler.so") \ 9211558Srgrimes \ 9221558Srgrimes diagnostic(bool, PrintNMethods, false, \ 9231558Srgrimes "Print assembly code for nmethods when generated") \ 9241558Srgrimes \ 9251558Srgrimes diagnostic(bool, PrintNativeNMethods, false, \ 9261558Srgrimes "Print assembly code for native nmethods when generated") \ 9271558Srgrimes \ 9281558Srgrimes develop(bool, PrintDebugInfo, false, \ 929100117Salfred "Print debug information for all nmethods when generated") \ 9301558Srgrimes \ 9311558Srgrimes develop(bool, PrintRelocations, false, \ 9321558Srgrimes "Print relocation information for all nmethods when generated") \ 9331558Srgrimes \ 9341558Srgrimes develop(bool, PrintDependencies, false, \ 935100117Salfred "Print dependency information for all nmethods when generated") \ 936100117Salfred \ 937100117Salfred develop(bool, PrintExceptionHandlers, false, \ 938100117Salfred "Print exception handler tables for all nmethods when generated") \ 939100117Salfred \ 940100117Salfred develop(bool, InterceptOSException, false, \ 941100117Salfred "Starts debugger when an implicit OS (e.g., NULL) " \ 942100117Salfred "exception happens") \ 943100117Salfred \ 944100117Salfred notproduct(bool, PrintCodeCache, false, \ 945100117Salfred "Print the compiled_code cache when exiting") \ 946100117Salfred \ 947100117Salfred develop(bool, PrintCodeCache2, false, \ 948100117Salfred "Print detailed info on the compiled_code cache when exiting") \ 949100117Salfred \ 950100117Salfred diagnostic(bool, PrintStubCode, false, \ 951100117Salfred "Print generated stub code") \ 952100117Salfred \ 95396622Siedowse product(bool, StackTraceInThrowable, true, \ 95496622Siedowse "Collect backtrace in throwable when exception happens") \ 9551558Srgrimes \ 9561558Srgrimes product(bool, OmitStackTraceInFastThrow, true, \ 9571558Srgrimes "Omit backtraces for some 'hot' exceptions in optimized code") \ 9581558Srgrimes \ 9591558Srgrimes product(bool, ProfilerPrintByteCodeStatistics, false, \ 9601558Srgrimes "Prints byte code statictics when dumping profiler output") \ 9611558Srgrimes \ 9621558Srgrimes product(bool, ProfilerRecordPC, false, \ 9631558Srgrimes "Collects tick for each 16 byte interval of compiled code") \ 9641558Srgrimes \ 9651558Srgrimes product(bool, ProfileVM, false, \ 9661558Srgrimes "Profiles ticks that fall within VM (either in the VM Thread " \ 9671558Srgrimes "or VM code called through stubs)") \ 96872650Sgreen \ 9691558Srgrimes product(bool, ProfileIntervals, false, \ 9701558Srgrimes "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 9711558Srgrimes \ 97251968Salfred notproduct(bool, ProfilerCheckIntervals, false, \ 97351968Salfred "Collect and print info on spacing of profiler ticks") \ 97451968Salfred \ 9751558Srgrimes develop(bool, PrintJVMWarnings, false, \ 9761558Srgrimes "Prints warnings for unimplemented JVM functions") \ 9771558Srgrimes \ 9781558Srgrimes product(bool, PrintWarnings, true, \ 9791558Srgrimes "Prints JVM warnings to output stream") \ 9801558Srgrimes \ 9811558Srgrimes notproduct(uintx, WarnOnStalledSpinLock, 0, \ 9821558Srgrimes "Prints warnings for stalled SpinLocks") \ 9831558Srgrimes \ 9841558Srgrimes develop(bool, InitializeJavaLangSystem, true, \ 9851558Srgrimes "Initialize java.lang.System - turn off for individual " \ 9861558Srgrimes "method debugging") \ 9871558Srgrimes \ 9881558Srgrimes develop(bool, InitializeJavaLangString, true, \ 9891558Srgrimes "Initialize java.lang.String - turn off for individual " \ 9901558Srgrimes "method debugging") \ 9911558Srgrimes \ 9921558Srgrimes develop(bool, InitializeJavaLangExceptionsErrors, true, \ 9931558Srgrimes "Initialize various error and exception classes - turn off for " \ 9941558Srgrimes "individual method debugging") \ 9951558Srgrimes \ 99696707Strhodes product(bool, RegisterFinalizersAtInit, true, \ 99796707Strhodes "Register finalizable objects at end of Object.<init> or " \ 99823681Speter "after allocation") \ 9991558Srgrimes \ 10001558Srgrimes develop(bool, RegisterReferences, true, \ 10011558Srgrimes "Tells whether the VM should register soft/weak/final/phantom " \ 10021558Srgrimes "references") \ 10031558Srgrimes \ 10041558Srgrimes develop(bool, IgnoreRewrites, false, \ 10059336Sdfr "Supress rewrites of bytecodes in the oopmap generator. " \ 100654093Ssemenu "This is unsafe!") \ 10071558Srgrimes \ 10081558Srgrimes develop(bool, PrintCodeCacheExtension, false, \ 100977435Sphk "Print extension of code cache") \ 101077577Sru \ 101154093Ssemenu develop(bool, UsePrivilegedStack, true, \ 101223681Speter "Enable the security JVM functions") \ 1013138680Sphk \ 10149336Sdfr develop(bool, IEEEPrecision, true, \ 10159336Sdfr "Enables IEEE precision (for INTEL only)") \ 10169336Sdfr \ 101777405Siedowse develop(bool, ProtectionDomainVerification, true, \ 101877405Siedowse "Verifies protection domain before resolution in system " \ 101977405Siedowse "dictionary") \ 102077405Siedowse \ 102174462Salfred product(bool, ClassUnloading, true, \ 10221558Srgrimes "Do unloading of classes") \ 10231558Srgrimes \ 10241558Srgrimes diagnostic(bool, LinkWellKnownClasses, false, \ 10251558Srgrimes "Resolve a well known class as soon as its name is seen") \ 10261558Srgrimes \ 10271558Srgrimes develop(bool, DisableStartThread, false, \ 10281558Srgrimes "Disable starting of additional Java threads " \ 10291558Srgrimes "(for debugging only)") \ 10301558Srgrimes \ 103137663Scharnier develop(bool, MemProfiling, false, \ 10321558Srgrimes "Write memory usage profiling to log file") \ 10331558Srgrimes \ 10341558Srgrimes notproduct(bool, PrintSystemDictionaryAtExit, false, \ 10351558Srgrimes "Prints the system dictionary at exit") \ 10361558Srgrimes \ 103737663Scharnier diagnostic(bool, UnsyncloadClass, false, \ 10381558Srgrimes "Unstable: VM calls loadClass unsynchronized. Custom " \ 10391558Srgrimes "class loader must call VM synchronized for findClass " \ 10401558Srgrimes "and defineClass.") \ 10411558Srgrimes \ 10421558Srgrimes product(bool, AlwaysLockClassLoader, false, \ 10431558Srgrimes "Require the VM to acquire the class loader lock before calling " \ 10441558Srgrimes "loadClass() even for class loaders registering " \ 10451558Srgrimes "as parallel capable") \ 10461558Srgrimes \ 10471558Srgrimes product(bool, AllowParallelDefineClass, false, \ 10481558Srgrimes "Allow parallel defineClass requests for class loaders " \ 10491558Srgrimes "registering as parallel capable") \ 10501558Srgrimes \ 10511558Srgrimes product(bool, MustCallLoadClassInternal, false, \ 10521558Srgrimes "Call loadClassInternal() rather than loadClass()") \ 10531558Srgrimes \ 10541558Srgrimes product_pd(bool, DontYieldALot, \ 10551558Srgrimes "Throw away obvious excess yield calls (for SOLARIS only)") \ 10561558Srgrimes \ 10571558Srgrimes product_pd(bool, ConvertSleepToYield, \ 10581558Srgrimes "Converts sleep(0) to thread yield " \ 10591558Srgrimes "(may be off for SOLARIS to improve GUI)") \ 10601558Srgrimes \ 10611558Srgrimes product(bool, ConvertYieldToSleep, false, \ 10621558Srgrimes "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 10631558Srgrimes "behavior (SOLARIS only)") \ 10641558Srgrimes \ 10651558Srgrimes product(bool, UseBoundThreads, true, \ 10661558Srgrimes "Bind user level threads to kernel threads (for SOLARIS only)") \ 10671558Srgrimes \ 10681558Srgrimes develop(bool, UseDetachedThreads, true, \ 106937663Scharnier "Use detached threads that are recycled upon termination " \ 10701558Srgrimes "(for SOLARIS only)") \ 10711558Srgrimes \ 10721558Srgrimes product(bool, UseLWPSynchronization, true, \ 10731558Srgrimes "Use LWP-based instead of libthread-based synchronization " \ 10741558Srgrimes "(SPARC only)") \ 10751558Srgrimes \ 10761558Srgrimes product(ccstr, SyncKnobs, NULL, \ 10771558Srgrimes "(Unstable) Various monitor synchronization tunables") \ 10781558Srgrimes \ 10791558Srgrimes product(intx, EmitSync, 0, \ 10801558Srgrimes "(Unsafe,Unstable) " \ 10811558Srgrimes " Controls emission of inline sync fast-path code") \ 108237663Scharnier \ 10831558Srgrimes product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 10841558Srgrimes \ 10851558Srgrimes product(intx, MonitorBound, 0, "Bound Monitor population") \ 10861558Srgrimes \ 10871558Srgrimes product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 10881558Srgrimes \ 10891558Srgrimes product(intx, Atomics, 0, \ 10901558Srgrimes "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 10911558Srgrimes \ 10921558Srgrimes product(intx, FenceInstruction, 0, \ 10931558Srgrimes "(Unsafe,Unstable) Experimental") \ 10941558Srgrimes \ 10951558Srgrimes product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 10961558Srgrimes \ 10971558Srgrimes product(intx, SyncVerbose, 0, "(Unstable)" ) \ 10981558Srgrimes \ 10991558Srgrimes product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 11001558Srgrimes \ 11011558Srgrimes product(intx, hashCode, 0, \ 11021558Srgrimes "(Unstable) select hashCode generation algorithm" ) \ 11031558Srgrimes \ 11041558Srgrimes product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 11051558Srgrimes "(Unstable, Linux-specific)" \ 11061558Srgrimes " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 11071558Srgrimes \ 11081558Srgrimes product(bool, FilterSpuriousWakeups, true, \ 110974462Salfred "Prevent spurious or premature wakeups from object.wait " \ 111074462Salfred "(Solaris only)") \ 111174462Salfred \ 11121558Srgrimes product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 111337663Scharnier product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 11141558Srgrimes product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 11151558Srgrimes \ 11161558Srgrimes develop(bool, UsePthreads, false, \ 11171558Srgrimes "Use pthread-based instead of libthread-based synchronization " \ 11181558Srgrimes "(SPARC only)") \ 11191558Srgrimes \ 11201558Srgrimes product(bool, AdjustConcurrency, false, \ 11211558Srgrimes "call thr_setconcurrency at thread create time to avoid " \ 11221558Srgrimes "LWP starvation on MP systems (For Solaris Only)") \ 11231558Srgrimes \ 11241558Srgrimes develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 11251558Srgrimes "Should the system attempt to update the compiler file when " \ 11261558Srgrimes "an error occurs?") \ 11271558Srgrimes \ 11281558Srgrimes product(bool, ReduceSignalUsage, false, \ 11291558Srgrimes "Reduce the use of OS signals in Java and/or the VM") \ 11301558Srgrimes \ 11311558Srgrimes notproduct(bool, ValidateMarkSweep, false, \ 11321558Srgrimes "Do extra validation during MarkSweep collection") \ 11331558Srgrimes \ 11341558Srgrimes notproduct(bool, RecordMarkSweepCompaction, false, \ 11351558Srgrimes "Enable GC-to-GC recording and querying of compaction during " \ 11361558Srgrimes "MarkSweep") \ 11371558Srgrimes \ 11381558Srgrimes develop_pd(bool, ShareVtableStubs, \ 11391558Srgrimes "Share vtable stubs (smaller code but worse branch prediction") \ 11401558Srgrimes \ 11411558Srgrimes develop(bool, LoadLineNumberTables, true, \ 11421558Srgrimes "Tells whether the class file parser loads line number tables") \ 11431558Srgrimes \ 11441558Srgrimes develop(bool, LoadLocalVariableTables, true, \ 11451558Srgrimes "Tells whether the class file parser loads local variable tables")\ 11461558Srgrimes \ 11471558Srgrimes develop(bool, LoadLocalVariableTypeTables, true, \ 114837003Sjoerg "Tells whether the class file parser loads local variable type tables")\ 114937663Scharnier \ 115037663Scharnier product(bool, AllowUserSignalHandlers, false, \ 115137004Sjoerg "Do not complain if the application installs signal handlers " \ 115237003Sjoerg "(Solaris & Linux only)") \ 115337663Scharnier \ 115437663Scharnier product(bool, UseSignalChaining, true, \ 115529317Sjlemon "Use signal-chaining to invoke signal handlers installed " \ 11561558Srgrimes "by the application (Solaris & Linux only)") \ 11577401Swpaul \ 115837663Scharnier product(bool, UseAltSigs, false, \ 115929317Sjlemon "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 11601558Srgrimes "internal signals (Solaris only)") \ 11611558Srgrimes \ 11621558Srgrimes product(bool, UseSpinning, false, \ 11631558Srgrimes "Use spinning in monitor inflation and before entry") \ 11641558Srgrimes \ 11651558Srgrimes product(bool, PreSpinYield, false, \ 11661558Srgrimes "Yield before inner spinning loop") \ 11671558Srgrimes \ 11681558Srgrimes product(bool, PostSpinYield, true, \ 11691558Srgrimes "Yield after inner spinning loop") \ 11701558Srgrimes \ 11711558Srgrimes product(bool, AllowJNIEnvProxy, false, \ 11721558Srgrimes "Allow JNIEnv proxies for jdbx") \ 11731558Srgrimes \ 11741558Srgrimes product(bool, JNIDetachReleasesMonitors, true, \ 117575641Siedowse "JNI DetachCurrentThread releases monitors owned by thread") \ 11761558Srgrimes \ 117737663Scharnier product(bool, RestoreMXCSROnJNICalls, false, \ 11781558Srgrimes "Restore MXCSR when returning from JNI calls") \ 11791558Srgrimes \ 11801558Srgrimes product(bool, CheckJNICalls, false, \ 11811558Srgrimes "Verify all arguments to JNI calls") \ 11821558Srgrimes \ 11831558Srgrimes product(bool, UseFastJNIAccessors, true, \ 118475801Siedowse "Use optimized versions of Get<Primitive>Field") \ 11851558Srgrimes \ 11861558Srgrimes product(bool, EagerXrunInit, false, \ 118729317Sjlemon "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 118874462Salfred " but not all -Xrun libraries may support the state of the VM at this time") \ 118974462Salfred \ 119029317Sjlemon product(bool, PreserveAllAnnotations, false, \ 119129317Sjlemon "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 119229317Sjlemon \ 119329317Sjlemon develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 119474462Salfred "Number of OutOfMemoryErrors preallocated with backtrace") \ 119529317Sjlemon \ 119629317Sjlemon product(bool, LazyBootClassLoader, true, \ 119729317Sjlemon "Enable/disable lazy opening of boot class path entries") \ 119829317Sjlemon \ 119929317Sjlemon diagnostic(bool, UseIncDec, true, \ 12001558Srgrimes "Use INC, DEC instructions on x86") \ 12011558Srgrimes \ 12021558Srgrimes product(bool, UseNewLongLShift, false, \ 12031558Srgrimes "Use optimized bitwise shift left") \ 12041558Srgrimes \ 12051558Srgrimes product(bool, UseStoreImmI16, true, \ 12061558Srgrimes "Use store immediate 16-bits value instruction on x86") \ 12071558Srgrimes \ 12081558Srgrimes product(bool, UseAddressNop, false, \ 120975635Siedowse "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 121075635Siedowse \ 121175635Siedowse product(bool, UseXmmLoadAndClearUpper, true, \ 121275635Siedowse "Load low part of XMM register and clear upper part") \ 121375635Siedowse \ 12141558Srgrimes product(bool, UseXmmRegToRegMoveAll, false, \ 12151558Srgrimes "Copy all XMM register bits when moving value between registers") \ 12161558Srgrimes \ 12171558Srgrimes product(bool, UseXmmI2D, false, \ 12181558Srgrimes "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 12191558Srgrimes \ 12209336Sdfr product(bool, UseXmmI2F, false, \ 12211558Srgrimes "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 12221558Srgrimes \ 12231558Srgrimes product(bool, UseXMMForArrayCopy, false, \ 12241558Srgrimes "Use SSE2 MOVQ instruction for Arraycopy") \ 12259336Sdfr \ 12261558Srgrimes product(bool, UseUnalignedLoadStores, false, \ 12271558Srgrimes "Use SSE2 MOVDQU instruction for Arraycopy") \ 12281558Srgrimes \ 12291558Srgrimes product(bool, UseCBCond, false, \ 12301558Srgrimes "Use compare and branch instruction on SPARC") \ 12311558Srgrimes \ 12321558Srgrimes product(intx, FieldsAllocationStyle, 1, \ 12331558Srgrimes "0 - type based with oops first, 1 - with oops last, " \ 12341558Srgrimes "2 - oops in super and sub classes are together") \ 12351558Srgrimes \ 12361558Srgrimes product(bool, CompactFields, true, \ 12371558Srgrimes "Allocate nonstatic fields in gaps between previous fields") \ 12381558Srgrimes \ 12391558Srgrimes notproduct(bool, PrintCompactFieldsSavings, false, \ 12401558Srgrimes "Print how many words were saved with CompactFields") \ 12411558Srgrimes \ 12421558Srgrimes product(bool, UseBiasedLocking, true, \ 12431558Srgrimes "Enable biased locking in JVM") \ 12441558Srgrimes \ 12451558Srgrimes product(intx, BiasedLockingStartupDelay, 4000, \ 12461558Srgrimes "Number of milliseconds to wait before enabling biased locking") \ 12471558Srgrimes \ 12481558Srgrimes diagnostic(bool, PrintBiasedLockingStatistics, false, \ 12491558Srgrimes "Print statistics of biased locking in JVM") \ 12501558Srgrimes \ 12511558Srgrimes product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 12521558Srgrimes "Threshold of number of revocations per type to try to " \ 12531558Srgrimes "rebias all objects in the heap of that type") \ 12541558Srgrimes \ 12551558Srgrimes product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 12561558Srgrimes "Threshold of number of revocations per type to permanently " \ 12571558Srgrimes "revoke biases of all objects in the heap of that type") \ 12581558Srgrimes \ 12591558Srgrimes product(intx, BiasedLockingDecayTime, 25000, \ 12601558Srgrimes "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 12611558Srgrimes "type after previous bulk rebias") \ 12621558Srgrimes \ 12631558Srgrimes develop(bool, JavaObjectsInPerm, false, \ 12641558Srgrimes "controls whether Classes and interned Strings are allocated" \ 126523681Speter "in perm. This purely intended to allow debugging issues" \ 12661558Srgrimes "in production.") \ 12671558Srgrimes \ 12681558Srgrimes /* tracing */ \ 12691558Srgrimes \ 12701558Srgrimes notproduct(bool, TraceRuntimeCalls, false, \ 12711558Srgrimes "Trace run-time calls") \ 12721558Srgrimes \ 12731558Srgrimes develop(bool, TraceJNICalls, false, \ 12741558Srgrimes "Trace JNI calls") \ 12751558Srgrimes \ 12761558Srgrimes notproduct(bool, TraceJVMCalls, false, \ 12771558Srgrimes "Trace JVM calls") \ 12781558Srgrimes \ 12791558Srgrimes product(ccstr, TraceJVMTI, NULL, \ 128023681Speter "Trace flags for JVMTI functions and events") \ 12811558Srgrimes \ 12821558Srgrimes /* This option can change an EMCP method into an obsolete method. */ \ 12831558Srgrimes /* This can affect tests that except specific methods to be EMCP. */ \ 12841558Srgrimes /* This option should be used with caution. */ \ 12851558Srgrimes product(bool, StressLdcRewrite, false, \ 12861558Srgrimes "Force ldc -> ldc_w rewrite during RedefineClasses") \ 12871558Srgrimes \ 12881558Srgrimes product(intx, TraceRedefineClasses, 0, \ 12891558Srgrimes "Trace level for JVMTI RedefineClasses") \ 12901558Srgrimes \ 12911558Srgrimes develop(bool, StressMethodComparator, false, \ 12921558Srgrimes "run the MethodComparator on all loaded methods") \ 12931558Srgrimes \ 1294100336Sjoerg /* change to false by default sometime after Mustang */ \ 1295100336Sjoerg product(bool, VerifyMergedCPBytecodes, true, \ 12961558Srgrimes "Verify bytecodes after RedefineClasses constant pool merging") \ 12971558Srgrimes \ 12981558Srgrimes develop(bool, TraceJNIHandleAllocation, false, \ 12991558Srgrimes "Trace allocation/deallocation of JNI handle blocks") \ 13001558Srgrimes \ 13011558Srgrimes develop(bool, TraceThreadEvents, false, \ 13021558Srgrimes "Trace all thread events") \ 13031558Srgrimes \ 13041558Srgrimes develop(bool, TraceBytecodes, false, \ 13051558Srgrimes "Trace bytecode execution") \ 13061558Srgrimes \ 13071558Srgrimes develop(bool, TraceClassInitialization, false, \ 13081558Srgrimes "Trace class initialization") \ 13091558Srgrimes \ 13101558Srgrimes develop(bool, TraceExceptions, false, \ 13111558Srgrimes "Trace exceptions") \ 13121558Srgrimes \ 13131558Srgrimes develop(bool, TraceICs, false, \ 13141558Srgrimes "Trace inline cache changes") \ 13151558Srgrimes \ 13161558Srgrimes notproduct(bool, TraceInvocationCounterOverflow, false, \ 13171558Srgrimes "Trace method invocation counter overflow") \ 13181558Srgrimes \ 13191558Srgrimes develop(bool, TraceInlineCacheClearing, false, \ 13201558Srgrimes "Trace clearing of inline caches in nmethods") \ 13211558Srgrimes \ 13221558Srgrimes develop(bool, TraceDependencies, false, \ 13231558Srgrimes "Trace dependencies") \ 13241558Srgrimes \ 13251558Srgrimes develop(bool, VerifyDependencies, trueInDebug, \ 13261558Srgrimes "Exercise and verify the compilation dependency mechanism") \ 13271558Srgrimes \ 13281558Srgrimes develop(bool, TraceNewOopMapGeneration, false, \ 13291558Srgrimes "Trace OopMapGeneration") \ 13301558Srgrimes \ 13311558Srgrimes develop(bool, TraceNewOopMapGenerationDetailed, false, \ 13321558Srgrimes "Trace OopMapGeneration: print detailed cell states") \ 13331558Srgrimes \ 13341558Srgrimes develop(bool, TimeOopMap, false, \ 13351558Srgrimes "Time calls to GenerateOopMap::compute_map() in sum") \ 133637663Scharnier \ 133737663Scharnier develop(bool, TimeOopMap2, false, \ 13381558Srgrimes "Time calls to GenerateOopMap::compute_map() individually") \ 13391558Srgrimes \ 13401558Srgrimes develop(bool, TraceMonitorMismatch, false, \ 13411558Srgrimes "Trace monitor matching failures during OopMapGeneration") \ 13421558Srgrimes \ 13431558Srgrimes develop(bool, TraceOopMapRewrites, false, \ 13441558Srgrimes "Trace rewritting of method oops during oop map generation") \ 13451558Srgrimes \ 13461558Srgrimes develop(bool, TraceSafepoint, false, \ 13471558Srgrimes "Trace safepoint operations") \ 13481558Srgrimes \ 13491558Srgrimes develop(bool, TraceICBuffer, false, \ 13501558Srgrimes "Trace usage of IC buffer") \ 13511558Srgrimes \ 13529336Sdfr develop(bool, TraceCompiledIC, false, \ 13531558Srgrimes "Trace changes of compiled IC") \ 13541558Srgrimes \ 13551558Srgrimes notproduct(bool, TraceZapDeadLocals, false, \ 13569336Sdfr "Trace zapping dead locals") \ 13571558Srgrimes \ 13581558Srgrimes develop(bool, TraceStartupTime, false, \ 13591558Srgrimes "Trace setup time") \ 13601558Srgrimes \ 13619336Sdfr product(ccstr, HPILibPath, NULL, \ 13621558Srgrimes "Specify alternate path to HPI library") \ 13631558Srgrimes \ 13641558Srgrimes develop(bool, TraceProtectionDomainVerification, false, \ 13651558Srgrimes "Trace protection domain verifcation") \ 13669336Sdfr \ 13671558Srgrimes develop(bool, TraceClearedExceptions, false, \ 13689336Sdfr "Prints when an exception is forcibly cleared") \ 13691558Srgrimes \ 13701558Srgrimes product(bool, TraceClassResolution, false, \ 13711558Srgrimes "Trace all constant pool resolutions (for debugging)") \ 13721558Srgrimes \ 13731558Srgrimes product(bool, TraceBiasedLocking, false, \ 13741558Srgrimes "Trace biased locking in JVM") \ 13751558Srgrimes \ 13761558Srgrimes product(bool, TraceMonitorInflation, false, \ 13771558Srgrimes "Trace monitor inflation in JVM") \ 137837663Scharnier \ 13791558Srgrimes /* assembler */ \ 13801558Srgrimes product(bool, Use486InstrsOnly, false, \ 13811558Srgrimes "Use 80486 Compliant instruction subset") \ 13829336Sdfr \ 13831558Srgrimes /* gc */ \ 13841558Srgrimes \ 13851558Srgrimes product(bool, UseSerialGC, false, \ 13861558Srgrimes "Use the serial garbage collector") \ 13871558Srgrimes \ 13881558Srgrimes product(bool, UseG1GC, false, \ 13891558Srgrimes "Use the Garbage-First garbage collector") \ 13901558Srgrimes \ 13911558Srgrimes product(bool, UseParallelGC, false, \ 13921558Srgrimes "Use the Parallel Scavenge garbage collector") \ 13939336Sdfr \ 13941558Srgrimes product(bool, UseParallelOldGC, false, \ 13951558Srgrimes "Use the Parallel Old garbage collector") \ 13961558Srgrimes \ 13979336Sdfr product(uintx, HeapMaximumCompactionInterval, 20, \ 13981558Srgrimes "How often should we maximally compact the heap (not allowing " \ 13991558Srgrimes "any dead space)") \ 14001558Srgrimes \ 14011558Srgrimes product(uintx, HeapFirstMaximumCompactionCount, 3, \ 14021558Srgrimes "The collection count for the first maximum compaction") \ 14031558Srgrimes \ 14041558Srgrimes product(bool, UseMaximumCompactionOnSystemGC, true, \ 14051558Srgrimes "In the Parallel Old garbage collector maximum compaction for " \ 14061558Srgrimes "a system GC") \ 14079336Sdfr \ 14081558Srgrimes product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 14091558Srgrimes "The mean used by the par compact dead wood" \ 14109336Sdfr "limiter (a number between 0-100).") \ 14111558Srgrimes \ 14121558Srgrimes product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 14131558Srgrimes "The standard deviation used by the par compact dead wood" \ 14141558Srgrimes "limiter (a number between 0-100).") \ 14151558Srgrimes \ 14161558Srgrimes product(uintx, ParallelGCThreads, 0, \ 14171558Srgrimes "Number of parallel threads parallel gc will use") \ 14181558Srgrimes \ 14191558Srgrimes develop(bool, ParallelOldGCSplitALot, false, \ 14201558Srgrimes "Provoke splitting (copying data from a young gen space to" \ 14211558Srgrimes "multiple destination spaces)") \ 14221558Srgrimes \ 14231558Srgrimes develop(uintx, ParallelOldGCSplitInterval, 3, \ 14241558Srgrimes "How often to provoke splitting a young gen space") \ 14251558Srgrimes \ 14261558Srgrimes develop(bool, TraceRegionTasksQueuing, false, \ 14271558Srgrimes "Trace the queuing of the region tasks") \ 14281558Srgrimes \ 14291558Srgrimes product(uintx, ConcGCThreads, 0, \ 14301558Srgrimes "Number of threads concurrent gc will use") \ 14319336Sdfr \ 14321558Srgrimes product(uintx, YoungPLABSize, 4096, \ 14339336Sdfr "Size of young gen promotion labs (in HeapWords)") \ 14341558Srgrimes \ 14351558Srgrimes product(uintx, OldPLABSize, 1024, \ 14361558Srgrimes "Size of old gen promotion labs (in HeapWords)") \ 14371558Srgrimes \ 14381558Srgrimes product(uintx, GCTaskTimeStampEntries, 200, \ 14391558Srgrimes "Number of time stamp entries per gc worker thread") \ 144074462Salfred \ 14411558Srgrimes product(bool, AlwaysTenure, false, \ 144274462Salfred "Always tenure objects in eden. (ParallelGC only)") \ 14431558Srgrimes \ 14441558Srgrimes product(bool, NeverTenure, false, \ 14451558Srgrimes "Never tenure objects in eden, May tenure on overflow " \ 14461558Srgrimes "(ParallelGC only)") \ 144774462Salfred \ 14481558Srgrimes product(bool, ScavengeBeforeFullGC, true, \ 144974462Salfred "Scavenge youngest generation before each full GC, " \ 14501558Srgrimes "used with UseParallelGC") \ 145174462Salfred \ 14521558Srgrimes develop(bool, ScavengeWithObjectsInToSpace, false, \ 14531558Srgrimes "Allow scavenges to occur when to_space contains objects.") \ 14541558Srgrimes \ 14551558Srgrimes product(bool, UseConcMarkSweepGC, false, \ 14561558Srgrimes "Use Concurrent Mark-Sweep GC in the old generation") \ 14571558Srgrimes \ 14581558Srgrimes product(bool, ExplicitGCInvokesConcurrent, false, \ 14591558Srgrimes "A System.gc() request invokes a concurrent collection;" \ 14601558Srgrimes " (effective only when UseConcMarkSweepGC)") \ 14611558Srgrimes \ 14629336Sdfr product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 14631558Srgrimes "A System.gc() request invokes a concurrent collection and " \ 146474462Salfred "also unloads classes during such a concurrent gc cycle " \ 14651558Srgrimes "(effective only when UseConcMarkSweepGC)") \ 14669336Sdfr \ 14671558Srgrimes product(bool, GCLockerInvokesConcurrent, false, \ 14681558Srgrimes "The exit of a JNI CS necessitating a scavenge also" \ 14691558Srgrimes " kicks off a bkgrd concurrent collection") \ 147074462Salfred \ 14711558Srgrimes product(uintx, GCLockerEdenExpansionPercent, 5, \ 14721558Srgrimes "How much the GC can expand the eden by while the GC locker " \ 14731558Srgrimes "is active (as a percentage)") \ 14749336Sdfr \ 14751558Srgrimes develop(bool, UseCMSAdaptiveFreeLists, true, \ 14761558Srgrimes "Use Adaptive Free Lists in the CMS generation") \ 14771558Srgrimes \ 14781558Srgrimes develop(bool, UseAsyncConcMarkSweepGC, true, \ 14791558Srgrimes "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 148074462Salfred \ 148174462Salfred develop(bool, RotateCMSCollectionTypes, false, \ 148275801Siedowse "Rotate the CMS collections among concurrent and STW") \ 148374462Salfred \ 148474462Salfred product(bool, UseCMSBestFit, true, \ 148574462Salfred "Use CMS best fit allocation strategy") \ 148674462Salfred \ 14879336Sdfr product(bool, UseCMSCollectionPassing, true, \ 148875801Siedowse "Use passing of collection from background to foreground") \ 14891558Srgrimes \ 149075801Siedowse product(bool, UseParNewGC, false, \ 149175801Siedowse "Use parallel threads in the new generation.") \ 149275801Siedowse \ 149375801Siedowse product(bool, ParallelGCVerbose, false, \ 149474462Salfred "Verbose output for parallel GC.") \ 149574462Salfred \ 149674462Salfred product(intx, ParallelGCBufferWastePct, 10, \ 149775801Siedowse "wasted fraction of parallel allocation buffer.") \ 149875801Siedowse \ 14991558Srgrimes diagnostic(bool, ParallelGCRetainPLAB, false, \ 15001558Srgrimes "Retain parallel allocation buffers across scavenges; " \ 15011558Srgrimes " -- disabled because this currently conflicts with " \ 15021558Srgrimes " parallel card scanning under certain conditions ") \ 15031558Srgrimes \ 15041558Srgrimes product(intx, TargetPLABWastePct, 10, \ 15051558Srgrimes "target wasted space in last buffer as pct of overall allocation")\ 15061558Srgrimes \ 15071558Srgrimes product(uintx, PLABWeight, 75, \ 15081558Srgrimes "Percentage (0-100) used to weight the current sample when" \ 15091558Srgrimes "computing exponentially decaying average for ResizePLAB.") \ 15101558Srgrimes \ 151174462Salfred product(bool, ResizePLAB, true, \ 15121558Srgrimes "Dynamically resize (survivor space) promotion labs") \ 15139336Sdfr \ 15141558Srgrimes product(bool, PrintPLAB, false, \ 15151558Srgrimes "Print (survivor space) promotion labs sizing decisions") \ 15161558Srgrimes \ 15171558Srgrimes product(intx, ParGCArrayScanChunk, 50, \ 15189336Sdfr "Scan a subset and push remainder, if array is bigger than this") \ 15191558Srgrimes \ 15201558Srgrimes product(bool, ParGCUseLocalOverflow, false, \ 15211558Srgrimes "Instead of a global overflow list, use local overflow stacks") \ 15221558Srgrimes \ 15231558Srgrimes product(bool, ParGCTrimOverflow, true, \ 15241558Srgrimes "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 15251558Srgrimes \ 15261558Srgrimes notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 15271558Srgrimes "Whether we should simulate work queue overflow in ParNew") \ 15281558Srgrimes \ 15291558Srgrimes notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 15301558Srgrimes "An `interval' counter that determines how frequently " \ 15311558Srgrimes "we simulate overflow; a smaller number increases frequency") \ 15321558Srgrimes \ 15331558Srgrimes product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 15341558Srgrimes "The desired number of objects to claim from the overflow list") \ 15351558Srgrimes \ 15361558Srgrimes diagnostic(intx, ParGCStridesPerThread, 2, \ 15371558Srgrimes "The number of strides per worker thread that we divide up the " \ 15381558Srgrimes "card table scanning work into") \ 15391558Srgrimes \ 15401558Srgrimes diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 15411558Srgrimes "The number of cards in each chunk of the parallel chunks used " \ 15421558Srgrimes "during card table scanning") \ 15431558Srgrimes \ 15441558Srgrimes product(uintx, CMSParPromoteBlocksToClaim, 16, \ 15451558Srgrimes "Number of blocks to attempt to claim when refilling CMS LAB for "\ 15461558Srgrimes "parallel GC.") \ 15471558Srgrimes \ 15481558Srgrimes product(uintx, OldPLABWeight, 50, \ 15491558Srgrimes "Percentage (0-100) used to weight the current sample when" \ 15501558Srgrimes "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 15511558Srgrimes \ 15521558Srgrimes product(bool, ResizeOldPLAB, true, \ 15531558Srgrimes "Dynamically resize (old gen) promotion labs") \ 155472650Sgreen \ 15551558Srgrimes product(bool, PrintOldPLAB, false, \ 15561558Srgrimes "Print (old gen) promotion labs sizing decisions") \ 15571558Srgrimes \ 15581558Srgrimes product(uintx, CMSOldPLABMin, 16, \ 15591558Srgrimes "Min size of CMS gen promotion lab caches per worker per blksize")\ 156051968Salfred \ 15611558Srgrimes product(uintx, CMSOldPLABMax, 1024, \ 15621558Srgrimes "Max size of CMS gen promotion lab caches per worker per blksize")\ 15631558Srgrimes \ 15641558Srgrimes product(uintx, CMSOldPLABNumRefills, 4, \ 15651558Srgrimes "Nominal number of refills of CMS gen promotion lab cache" \ 15661558Srgrimes " per worker per block size") \ 15671558Srgrimes \ 15681558Srgrimes product(bool, CMSOldPLABResizeQuicker, false, \ 156937663Scharnier "Whether to react on-the-fly during a scavenge to a sudden" \ 15701558Srgrimes " change in block demand rate") \ 157137663Scharnier \ 15721558Srgrimes product(uintx, CMSOldPLABToleranceFactor, 4, \ 15731558Srgrimes "The tolerance of the phase-change detector for on-the-fly" \ 157437663Scharnier " PLAB resizing during a scavenge") \ 15751558Srgrimes \ 15761558Srgrimes product(uintx, CMSOldPLABReactivityFactor, 2, \ 15771558Srgrimes "The gain in the feedback loop for on-the-fly PLAB resizing" \ 15781558Srgrimes " during a scavenge") \ 15791558Srgrimes \ 15801558Srgrimes product(uintx, CMSOldPLABReactivityCeiling, 10, \ 15811558Srgrimes "The clamping of the gain in the feedback loop for on-the-fly" \ 15821558Srgrimes " PLAB resizing during a scavenge") \ 15831558Srgrimes \ 15841558Srgrimes product(bool, AlwaysPreTouch, false, \ 15851558Srgrimes "It forces all freshly committed pages to be pre-touched.") \ 15861558Srgrimes \ 15871558Srgrimes product_pd(intx, CMSYoungGenPerWorker, \ 15881558Srgrimes "The maximum size of young gen chosen by default per GC worker " \ 15891558Srgrimes "thread available") \ 15901558Srgrimes \ 15911558Srgrimes product(bool, GCOverheadReporting, false, \ 15921558Srgrimes "Enables the GC overhead reporting facility") \ 15931558Srgrimes \ 15941558Srgrimes product(intx, GCOverheadReportingPeriodMS, 100, \ 15951558Srgrimes "Reporting period for conc GC overhead reporting, in ms ") \ 15961558Srgrimes \ 15971558Srgrimes product(bool, CMSIncrementalMode, false, \ 15981558Srgrimes "Whether CMS GC should operate in \"incremental\" mode") \ 15991558Srgrimes \ 16001558Srgrimes product(uintx, CMSIncrementalDutyCycle, 10, \ 160175801Siedowse "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 16021558Srgrimes "CMSIncrementalPacing is enabled, then this is just the initial" \ 160337663Scharnier "value") \ 16041558Srgrimes \ 16051558Srgrimes product(bool, CMSIncrementalPacing, true, \ 16061558Srgrimes "Whether the CMS incremental mode duty cycle should be " \ 16071558Srgrimes "automatically adjusted") \ 16081558Srgrimes \ 16091558Srgrimes product(uintx, CMSIncrementalDutyCycleMin, 0, \ 161074462Salfred "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 161174462Salfred "enabled (a percentage, 0-100)") \ 161274462Salfred \ 161374462Salfred product(uintx, CMSIncrementalSafetyFactor, 10, \ 161474462Salfred "Percentage (0-100) used to add conservatism when computing the " \ 16151558Srgrimes "duty cycle") \ 161637663Scharnier \ 16171558Srgrimes product(uintx, CMSIncrementalOffset, 0, \ 16181558Srgrimes "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 161937663Scharnier " is shifted to the right within the period between young GCs") \ 16201558Srgrimes \ 16211558Srgrimes product(uintx, CMSExpAvgFactor, 50, \ 16221558Srgrimes "Percentage (0-100) used to weight the current sample when" \ 16231558Srgrimes "computing exponential averages for CMS statistics.") \ 16241558Srgrimes \ 16251558Srgrimes product(uintx, CMS_FLSWeight, 75, \ 16261558Srgrimes "Percentage (0-100) used to weight the current sample when" \ 16271558Srgrimes "computing exponentially decating averages for CMS FLS statistics.") \ 162827447Sdfr \ 162927447Sdfr product(uintx, CMS_FLSPadding, 1, \ 163027447Sdfr "The multiple of deviation from mean to use for buffering" \ 163127447Sdfr "against volatility in free list demand.") \ 163227447Sdfr \ 163327447Sdfr product(uintx, FLSCoalescePolicy, 2, \ 163427447Sdfr "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1635100336Sjoerg \ 1636100336Sjoerg product(bool, FLSAlwaysCoalesceLarge, false, \ 16371558Srgrimes "CMS: Larger free blocks are always available for coalescing") \ 163837663Scharnier \ 16391558Srgrimes product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 16401558Srgrimes "CMS: the smaller the percentage the greater the coalition force")\ 16411558Srgrimes \ 16421558Srgrimes product(double, CMSSmallCoalSurplusPercent, 1.05, \ 16431558Srgrimes "CMS: the factor by which to inflate estimated demand of small" \ 16441558Srgrimes " block sizes to prevent coalescing with an adjoining block") \ 16451558Srgrimes \ 16461558Srgrimes product(double, CMSLargeCoalSurplusPercent, 0.95, \ 16471558Srgrimes "CMS: the factor by which to inflate estimated demand of large" \ 16481558Srgrimes " block sizes to prevent coalescing with an adjoining block") \ 16491558Srgrimes \ 16501558Srgrimes product(double, CMSSmallSplitSurplusPercent, 1.10, \ 16511558Srgrimes "CMS: the factor by which to inflate estimated demand of small" \ 16521558Srgrimes " block sizes to prevent splitting to supply demand for smaller" \ 16531558Srgrimes " blocks") \ 16541558Srgrimes \ 16551558Srgrimes product(double, CMSLargeSplitSurplusPercent, 1.00, \ 16561558Srgrimes "CMS: the factor by which to inflate estimated demand of large" \ 16571558Srgrimes " block sizes to prevent splitting to supply demand for smaller" \ 16581558Srgrimes " blocks") \ 16591558Srgrimes \ 16601558Srgrimes product(bool, CMSExtrapolateSweep, false, \ 16617401Swpaul "CMS: cushion for block demand during sweep") \ 16621558Srgrimes \ 16631558Srgrimes product(uintx, CMS_SweepWeight, 75, \ 16647401Swpaul "Percentage (0-100) used to weight the current sample when " \ 16651558Srgrimes "computing exponentially decaying average for inter-sweep " \ 16667401Swpaul "duration") \ 166775635Siedowse \ 166874462Salfred product(uintx, CMS_SweepPadding, 1, \ 166974462Salfred "The multiple of deviation from mean to use for buffering " \ 16701558Srgrimes "against volatility in inter-sweep duration.") \ 167174462Salfred \ 167274462Salfred product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 16731558Srgrimes "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 16741558Srgrimes "duration exceeds this threhold in milliseconds") \ 167574462Salfred \ 167674462Salfred develop(bool, CMSTraceIncrementalMode, false, \ 167774462Salfred "Trace CMS incremental mode") \ 167874462Salfred \ 167974462Salfred develop(bool, CMSTraceIncrementalPacing, false, \ 168075635Siedowse "Trace CMS incremental mode pacing computation") \ 168174462Salfred \ 168274462Salfred develop(bool, CMSTraceThreadState, false, \ 168374462Salfred "Trace the CMS thread state (enable the trace_state() method)") \ 168474462Salfred \ 168574462Salfred product(bool, CMSClassUnloadingEnabled, false, \ 168674462Salfred "Whether class unloading enabled when using CMS GC") \ 1687146187Sume \ 168874462Salfred product(uintx, CMSClassUnloadingMaxInterval, 0, \ 168974462Salfred "When CMS class unloading is enabled, the maximum CMS cycle count"\ 169074462Salfred " for which classes may not be unloaded") \ 169175641Siedowse \ 169274462Salfred product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 169375635Siedowse "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 169475635Siedowse \ 169575635Siedowse product(bool, UseCMSCompactAtFullCollection, true, \ 169675635Siedowse "Use mark sweep compact at full collections") \ 169775635Siedowse \ 169875635Siedowse product(uintx, CMSFullGCsBeforeCompaction, 0, \ 169975635Siedowse "Number of CMS full collection done before compaction if > 0") \ 170075635Siedowse \ 170175635Siedowse develop(intx, CMSDictionaryChoice, 0, \ 170275635Siedowse "Use BinaryTreeDictionary as default in the CMS generation") \ 170375635Siedowse \ 170475801Siedowse product(uintx, CMSIndexedFreeListReplenish, 4, \ 170575635Siedowse "Replenish an indexed free list with this number of chunks") \ 170675635Siedowse \ 170775635Siedowse product(bool, CMSReplenishIntermediate, true, \ 170875635Siedowse "Replenish all intermediate free-list caches") \ 170975635Siedowse \ 171075635Siedowse product(bool, CMSSplitIndexedFreeListBlocks, true, \ 171175635Siedowse "When satisfying batched demand, split blocks from the " \ 171275635Siedowse "IndexedFreeList whose size is a multiple of requested size") \ 171375635Siedowse \ 171474462Salfred product(bool, CMSLoopWarn, false, \ 17151558Srgrimes "Warn in case of excessive CMS looping") \ 171675635Siedowse \ 17171558Srgrimes develop(bool, CMSOverflowEarlyRestoration, false, \ 17181558Srgrimes "Whether preserved marks should be restored early") \ 17191558Srgrimes \ 17201558Srgrimes product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 17211558Srgrimes "Size of marking stack") \ 17221558Srgrimes \ 17231558Srgrimes product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 17241558Srgrimes "Max size of marking stack") \ 17251558Srgrimes \ 17261558Srgrimes notproduct(bool, CMSMarkStackOverflowALot, false, \ 17271558Srgrimes "Whether we should simulate frequent marking stack / work queue" \ 17281558Srgrimes " overflow") \ 17291558Srgrimes \ 17301558Srgrimes notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 17311558Srgrimes "An `interval' counter that determines how frequently" \ 17321558Srgrimes " we simulate overflow; a smaller number increases frequency") \ 17331558Srgrimes \ 173427447Sdfr product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 173527447Sdfr "(Temporary, subject to experimentation)" \ 17361558Srgrimes "Maximum number of abortable preclean iterations, if > 0") \ 17371558Srgrimes \ 17381558Srgrimes product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 17391558Srgrimes "(Temporary, subject to experimentation)" \ 17401558Srgrimes "Maximum time in abortable preclean in ms") \ 17411558Srgrimes \ 17421558Srgrimes product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 17431558Srgrimes "(Temporary, subject to experimentation)" \ 17441558Srgrimes "Nominal minimum work per abortable preclean iteration") \ 17451558Srgrimes \ 17461558Srgrimes manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 17471558Srgrimes "(Temporary, subject to experimentation)" \ 17481558Srgrimes " Time that we sleep between iterations when not given" \ 17491558Srgrimes " enough work per iteration") \ 17501558Srgrimes \ 17511558Srgrimes product(uintx, CMSRescanMultiple, 32, \ 17521558Srgrimes "Size (in cards) of CMS parallel rescan task") \ 17531558Srgrimes \ 17541558Srgrimes product(uintx, CMSConcMarkMultiple, 32, \ 17551558Srgrimes "Size (in cards) of CMS concurrent MT marking task") \ 17561558Srgrimes \ 17571558Srgrimes product(uintx, CMSRevisitStackSize, 1*M, \ 17581558Srgrimes "Size of CMS KlassKlass revisit stack") \ 17591558Srgrimes \ 17601558Srgrimes product(bool, CMSAbortSemantics, false, \ 17611558Srgrimes "Whether abort-on-overflow semantics is implemented") \ 17621558Srgrimes \ 17631558Srgrimes product(bool, CMSParallelRemarkEnabled, true, \ 17641558Srgrimes "Whether parallel remark enabled (only if ParNewGC)") \ 17659336Sdfr \ 17661558Srgrimes product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 17671558Srgrimes "Whether parallel remark of survivor space" \ 17681558Srgrimes " enabled (effective only if CMSParallelRemarkEnabled)") \ 17691558Srgrimes \ 17701558Srgrimes product(bool, CMSPLABRecordAlways, true, \ 17711558Srgrimes "Whether to always record survivor space PLAB bdries" \ 17721558Srgrimes " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 17731558Srgrimes \ 17741558Srgrimes product(bool, CMSConcurrentMTEnabled, true, \ 17751558Srgrimes "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 177637663Scharnier \ 17771558Srgrimes product(bool, CMSPermGenPrecleaningEnabled, true, \ 17781558Srgrimes "Whether concurrent precleaning enabled in perm gen" \ 17791558Srgrimes " (effective only when CMSPrecleaningEnabled is true)") \ 17801558Srgrimes \ 17811558Srgrimes product(bool, CMSPrecleaningEnabled, true, \ 17821558Srgrimes "Whether concurrent precleaning enabled") \ 17831558Srgrimes \ 17841558Srgrimes product(uintx, CMSPrecleanIter, 3, \ 17851558Srgrimes "Maximum number of precleaning iteration passes") \ 17861558Srgrimes \ 17871558Srgrimes product(uintx, CMSPrecleanNumerator, 2, \ 17881558Srgrimes "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 178972650Sgreen " ratio") \ 17901558Srgrimes \ 17911558Srgrimes product(uintx, CMSPrecleanDenominator, 3, \ 17921558Srgrimes "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 17931558Srgrimes " ratio") \ 179475841Siedowse \ 179574462Salfred product(bool, CMSPrecleanRefLists1, true, \ 179675801Siedowse "Preclean ref lists during (initial) preclean phase") \ 179774462Salfred \ 17981558Srgrimes product(bool, CMSPrecleanRefLists2, false, \ 17991558Srgrimes "Preclean ref lists during abortable preclean phase") \ 18001558Srgrimes \ 18011558Srgrimes product(bool, CMSPrecleanSurvivors1, false, \ 18021558Srgrimes "Preclean survivors during (initial) preclean phase") \ 18039336Sdfr \ 180454093Ssemenu product(bool, CMSPrecleanSurvivors2, true, \ 18051558Srgrimes "Preclean survivors during abortable preclean phase") \ 18061558Srgrimes \ 180775801Siedowse product(uintx, CMSPrecleanThreshold, 1000, \ 180875801Siedowse "Don't re-iterate if #dirty cards less than this") \ 18091558Srgrimes \ 181075801Siedowse product(bool, CMSCleanOnEnter, true, \ 181175801Siedowse "Clean-on-enter optimization for reducing number of dirty cards") \ 181275801Siedowse \ 181375801Siedowse product(uintx, CMSRemarkVerifyVariant, 1, \ 181475801Siedowse "Choose variant (1,2) of verification following remark") \ 181575641Siedowse \ 181674462Salfred product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 181775641Siedowse "If Eden used is below this value, don't try to schedule remark") \ 181875641Siedowse \ 18191558Srgrimes product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 18201558Srgrimes "The Eden occupancy % at which to try and schedule remark pause") \ 18211558Srgrimes \ 18221558Srgrimes product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 182375641Siedowse "Start sampling Eden top at least before yg occupancy reaches" \ 182474462Salfred " 1/<ratio> of the size at which we plan to schedule remark") \ 182575801Siedowse \ 182675801Siedowse product(uintx, CMSSamplingGrain, 16*K, \ 182775801Siedowse "The minimum distance between eden samples for CMS (see above)") \ 18281558Srgrimes \ 18291558Srgrimes product(bool, CMSScavengeBeforeRemark, false, \ 183075801Siedowse "Attempt scavenge before the CMS remark step") \ 183174462Salfred \ 183274462Salfred develop(bool, CMSTraceSweeper, false, \ 183375801Siedowse "Trace some actions of the CMS sweeper") \ 183475801Siedowse \ 183575801Siedowse product(uintx, CMSWorkQueueDrainThreshold, 10, \ 183675801Siedowse "Don't drain below this size per parallel worker/thief") \ 183775801Siedowse \ 183875801Siedowse manageable(intx, CMSWaitDuration, 2000, \ 18391558Srgrimes "Time in milliseconds that CMS thread waits for young GC") \ 184075641Siedowse \ 184175801Siedowse product(bool, CMSYield, true, \ 184275801Siedowse "Yield between steps of concurrent mark & sweep") \ 184375801Siedowse \ 184475801Siedowse product(uintx, CMSBitMapYieldQuantum, 10*M, \ 184575641Siedowse "Bitmap operations should process at most this many bits" \ 18467401Swpaul "between yields") \ 18477401Swpaul \ 18487401Swpaul product(bool, CMSDumpAtPromotionFailure, false, \ 18491558Srgrimes "Dump useful information about the state of the CMS old " \ 185037663Scharnier " generation upon a promotion failure.") \ 18511558Srgrimes \ 18521558Srgrimes product(bool, CMSPrintChunksInDump, false, \ 18531558Srgrimes "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 18541558Srgrimes " more detailed information about the free chunks.") \ 18551558Srgrimes \ 18561558Srgrimes product(bool, CMSPrintObjectsInDump, false, \ 18571558Srgrimes "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 18581558Srgrimes " more detailed information about the allocated objects.") \ 18591558Srgrimes \ 18601558Srgrimes diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 186196707Strhodes "Verify that all refs across the FLS boundary " \ 18621558Srgrimes " are to valid objects") \ 18639336Sdfr \ 186474462Salfred diagnostic(bool, FLSVerifyLists, false, \ 18651558Srgrimes "Do lots of (expensive) FreeListSpace verification") \ 18661558Srgrimes \ 18671558Srgrimes diagnostic(bool, FLSVerifyIndexTable, false, \ 18681558Srgrimes "Do lots of (expensive) FLS index table verification") \ 1869100336Sjoerg \ 1870100336Sjoerg develop(bool, FLSVerifyDictionary, false, \ 18711558Srgrimes "Do lots of (expensive) FLS dictionary verification") \ 187275635Siedowse \ 187375635Siedowse develop(bool, VerifyBlockOffsetArray, false, \ 187475635Siedowse "Do (expensive!) block offset array verification") \ 18751558Srgrimes \ 187637663Scharnier diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 18771558Srgrimes "Maintain _unallocated_block in BlockOffsetArray" \ 18781558Srgrimes " (currently applicable only to CMS collector)") \ 18791558Srgrimes \ 1880100336Sjoerg develop(bool, TraceCMSState, false, \ 1881100336Sjoerg "Trace the state of the CMS collection") \ 1882100336Sjoerg \ 1883100336Sjoerg product(intx, RefDiscoveryPolicy, 0, \ 1884100336Sjoerg "Whether reference-based(0) or referent-based(1)") \ 1885100336Sjoerg \ 1886100336Sjoerg product(bool, ParallelRefProcEnabled, false, \ 1887100336Sjoerg "Enable parallel reference processing whenever possible") \ 18881558Srgrimes \ 18891558Srgrimes product(bool, ParallelRefProcBalancingEnabled, true, \ 18901558Srgrimes "Enable balancing of reference processing queues") \ 18911558Srgrimes \ 18921558Srgrimes product(intx, CMSTriggerRatio, 80, \ 18931558Srgrimes "Percentage of MinHeapFreeRatio in CMS generation that is " \ 18941558Srgrimes "allocated before a CMS collection cycle commences") \ 18951558Srgrimes \ 18961558Srgrimes product(intx, CMSTriggerPermRatio, 80, \ 189737663Scharnier "Percentage of MinHeapFreeRatio in the CMS perm generation that " \ 189837663Scharnier "is allocated before a CMS collection cycle commences, that " \ 18991558Srgrimes "also collects the perm generation") \ 19001558Srgrimes \ 19011558Srgrimes product(uintx, CMSBootstrapOccupancy, 50, \ 19021558Srgrimes "Percentage CMS generation occupancy at which to " \ 190375841Siedowse "initiate CMS collection for bootstrapping collection stats") \ 190475841Siedowse \ 190575841Siedowse product(intx, CMSInitiatingOccupancyFraction, -1, \ 190675841Siedowse "Percentage CMS generation occupancy to start a CMS collection " \ 190775841Siedowse "cycle. A negative value means that CMSTriggerRatio is used") \ 190875841Siedowse \ 190975841Siedowse product(uintx, InitiatingHeapOccupancyPercent, 45, \ 19101558Srgrimes "Percentage of the (entire) heap occupancy to start a " \ 191174462Salfred "concurrent GC cycle. It us used by GCs that trigger a " \ 191275641Siedowse "concurrent GC cycle based on the occupancy of the entire heap, " \ 191374462Salfred "not just one of the generations (e.g., G1). A value of 0 " \ 191475641Siedowse "denotes 'do constant GC cycles'.") \ 19151558Srgrimes \ 19161558Srgrimes product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 19171558Srgrimes "Percentage CMS perm generation occupancy to start a " \ 19181558Srgrimes "CMScollection cycle. A negative value means that " \ 19191558Srgrimes "CMSTriggerPermRatio is used") \ 19201558Srgrimes \ 19211558Srgrimes product(bool, UseCMSInitiatingOccupancyOnly, false, \ 19221558Srgrimes "Only use occupancy as a crierion for starting a CMS collection") \ 19231558Srgrimes \ 192475801Siedowse product(intx, CMSIsTooFullPercentage, 98, \ 192575801Siedowse "An absolute ceiling above which CMS will always consider the " \ 19261558Srgrimes "perm gen ripe for collection") \ 19271558Srgrimes \ 19281558Srgrimes develop(bool, CMSTestInFreeList, false, \ 19291558Srgrimes "Check if the coalesced range is already in the " \ 19301558Srgrimes "free lists as claimed") \ 19311558Srgrimes \ 19321558Srgrimes notproduct(bool, CMSVerifyReturnedBytes, false, \ 193375861Siedowse "Check that all the garbage collected was returned to the " \ 193474462Salfred "free lists.") \ 193575801Siedowse \ 193675861Siedowse notproduct(bool, ScavengeALot, false, \ 193774462Salfred "Force scavenge at every Nth exit from the runtime system " \ 193874462Salfred "(N=ScavengeALotInterval)") \ 193974462Salfred \ 19401558Srgrimes develop(bool, FullGCALot, false, \ 194175635Siedowse "Force full gc at every Nth exit from the runtime system " \ 194274462Salfred "(N=FullGCALotInterval)") \ 194374462Salfred \ 194474462Salfred notproduct(bool, GCALotAtAllSafepoints, false, \ 194574462Salfred "Enforce ScavengeALot/GCALot at all potential safepoints") \ 194674462Salfred \ 194774462Salfred product(bool, PrintPromotionFailure, false, \ 194875861Siedowse "Print additional diagnostic information following " \ 194975861Siedowse " promotion failure") \ 195075861Siedowse \ 195175861Siedowse notproduct(bool, PromotionFailureALot, false, \ 195275861Siedowse "Use promotion failure handling on every youngest generation " \ 195374462Salfred "collection") \ 195475801Siedowse \ 195575801Siedowse develop(uintx, PromotionFailureALotCount, 1000, \ 195675801Siedowse "Number of promotion failures occurring at ParGCAllocBuffer" \ 195775801Siedowse "refill attempts (ParNew) or promotion attempts " \ 195875801Siedowse "(other young collectors) ") \ 195975801Siedowse \ 196075801Siedowse develop(uintx, PromotionFailureALotInterval, 5, \ 196174462Salfred "Total collections between promotion failures alot") \ 196275861Siedowse \ 196375861Siedowse experimental(intx, WorkStealingSleepMillis, 1, \ 196475861Siedowse "Sleep time when sleep is used for yields") \ 196574462Salfred \ 196675801Siedowse experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 196775801Siedowse "Number of yields before a sleep is done during workstealing") \ 196875801Siedowse \ 196974462Salfred experimental(uintx, WorkStealingHardSpins, 4096, \ 197075801Siedowse "Number of iterations in a spin loop between checks on " \ 197174462Salfred "time out of hard spin") \ 197274462Salfred \ 197375801Siedowse experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 197474462Salfred "Ratio of hard spins to calls to yield") \ 197575801Siedowse \ 197675801Siedowse product(uintx, PreserveMarkStackSize, 1024, \ 197774462Salfred "Size for stack used in promotion failure handling") \ 197875861Siedowse \ 197975861Siedowse develop(uintx, ObjArrayMarkingStride, 512, \ 198075861Siedowse "Number of ObjArray elements to push onto the marking stack" \ 198175861Siedowse "before pushing a continuation entry") \ 198275861Siedowse \ 198375861Siedowse notproduct(bool, ExecuteInternalVMTests, false, \ 198475861Siedowse "Enable execution of internal VM tests.") \ 198575861Siedowse \ 198675861Siedowse product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 198775861Siedowse \ 198874462Salfred product_pd(bool, ResizeTLAB, \ 198925318Spst "Dynamically resize tlab size for threads") \ 199075801Siedowse \ 199175801Siedowse product(bool, ZeroTLAB, false, \ 199275801Siedowse "Zero out the newly created TLAB") \ 199375801Siedowse \ 199475801Siedowse product(bool, FastTLABRefill, true, \ 199575801Siedowse "Use fast TLAB refill code") \ 199675801Siedowse \ 199775801Siedowse product(bool, PrintTLAB, false, \ 199875801Siedowse "Print various TLAB related information") \ 199974462Salfred \ 200075801Siedowse product(bool, TLABStats, true, \ 200175801Siedowse "Print various TLAB related information") \ 200275801Siedowse \ 200375801Siedowse product(bool, UseBlockZeroing, false, \ 2004146187Sume "Use special cpu instructions for block zeroing") \ 200575801Siedowse \ 200675801Siedowse product(intx, BlockZeroingLowLimit, 2048, \ 200775801Siedowse "Minimum size in bytes when block zeroing will be used") \ 200875801Siedowse \ 200975801Siedowse product(bool, UseBlockCopy, false, \ 201075801Siedowse "Use special cpu instructions for block copy") \ 201175801Siedowse \ 201275801Siedowse product(intx, BlockCopyLowLimit, 2048, \ 201375801Siedowse "Minimum size in bytes when block copy will be used") \ 201475801Siedowse \ 201575801Siedowse product(bool, PrintRevisitStats, false, \ 201674462Salfred "Print revisit (klass and MDO) stack related information") \ 201774462Salfred \ 201875801Siedowse EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 201974462Salfred "Enable LowMemoryProtection")) \ 202075801Siedowse \ 202175801Siedowse product_pd(bool, NeverActAsServerClassMachine, \ 202275801Siedowse "Never act like a server-class machine") \ 202375801Siedowse \ 202474462Salfred product(bool, AlwaysActAsServerClassMachine, false, \ 202575801Siedowse "Always act like a server-class machine") \ 202675801Siedowse \ 202775801Siedowse product_pd(uint64_t, MaxRAM, \ 202874462Salfred "Real memory size (in bytes) used to set maximum heap size") \ 202975801Siedowse \ 203075801Siedowse product(uintx, ErgoHeapSizeLimit, 0, \ 203175801Siedowse "Maximum ergonomically set heap size (in bytes); zero means use " \ 203275801Siedowse "MaxRAM / MaxRAMFraction") \ 203375801Siedowse \ 203475801Siedowse product(uintx, MaxRAMFraction, 4, \ 203575801Siedowse "Maximum fraction (1/n) of real memory used for maximum heap " \ 203675801Siedowse "size") \ 203775801Siedowse \ 203875801Siedowse product(uintx, DefaultMaxRAMFraction, 4, \ 203975801Siedowse "Maximum fraction (1/n) of real memory used for maximum heap " \ 204075801Siedowse "size; deprecated: to be renamed to MaxRAMFraction") \ 204175801Siedowse \ 204275801Siedowse product(uintx, MinRAMFraction, 2, \ 204375801Siedowse "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 204474462Salfred "size on systems with small physical memory size") \ 204574462Salfred \ 204674462Salfred product(uintx, InitialRAMFraction, 64, \ 204774462Salfred "Fraction (1/n) of real memory used for initial heap size") \ 204874462Salfred \ 204974462Salfred product(bool, UseAutoGCSelectPolicy, false, \ 205074462Salfred "Use automatic collection selection policy") \ 205174462Salfred \ 205274462Salfred product(uintx, AutoGCSelectPauseMillis, 5000, \ 205374462Salfred "Automatic GC selection pause threshhold in ms") \ 205474462Salfred \ 20551558Srgrimes product(bool, UseAdaptiveSizePolicy, true, \ 20561558Srgrimes "Use adaptive generation sizing policies") \ 20571558Srgrimes \ 20581558Srgrimes product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 20591558Srgrimes "Use adaptive survivor sizing policies") \ 20601558Srgrimes \ 20611558Srgrimes product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 20621558Srgrimes "Use adaptive young-old sizing policies at minor collections") \ 20631558Srgrimes \ 20641558Srgrimes product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 20651558Srgrimes "Use adaptive young-old sizing policies at major collections") \ 20661558Srgrimes \ 20671558Srgrimes product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 20681558Srgrimes "Use statistics from System.GC for adaptive size policy") \ 20691558Srgrimes \ 20701558Srgrimes product(bool, UseAdaptiveGCBoundary, false, \ 20711558Srgrimes "Allow young-old boundary to move") \ 20721558Srgrimes \ 20731558Srgrimes develop(bool, TraceAdaptiveGCBoundary, false, \ 20741558Srgrimes "Trace young-old boundary moves") \ 20751558Srgrimes \ 20761558Srgrimes develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 20771558Srgrimes "Resize the virtual spaces of the young or old generations") \ 20781558Srgrimes \ 20791558Srgrimes product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 20801558Srgrimes "Policy for changeing generation size for throughput goals") \ 20811558Srgrimes \ 20821558Srgrimes product(uintx, AdaptiveSizePausePolicy, 0, \ 20831558Srgrimes "Policy for changing generation size for pause goals") \ 20841558Srgrimes \ 20851558Srgrimes develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 20861558Srgrimes "Adjust tenured generation to achive a minor pause goal") \ 20871558Srgrimes \ 208896622Siedowse develop(bool, PSAdjustYoungGenForMajorPause, false, \ 20891558Srgrimes "Adjust young generation to achive a major pause goal") \ 20901558Srgrimes \ 20911558Srgrimes product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 20921558Srgrimes "Number of steps where heuristics is used before data is used") \ 20931558Srgrimes \ 20941558Srgrimes develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 20951558Srgrimes "Number of collections before the adaptive sizing is started") \ 20961558Srgrimes \ 209796622Siedowse product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 20981558Srgrimes "Collecton interval for printing information; zero => never") \ 20991558Srgrimes \ 21001558Srgrimes product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 21011558Srgrimes "Use adaptive minimum footprint as a goal") \ 21021558Srgrimes \ 21031558Srgrimes product(uintx, AdaptiveSizePolicyWeight, 10, \ 21041558Srgrimes "Weight given to exponential resizing, between 0 and 100") \ 21051558Srgrimes \ 21061558Srgrimes product(uintx, AdaptiveTimeWeight, 25, \ 21071558Srgrimes "Weight given to time in adaptive policy, between 0 and 100") \ 210879117Sdd \ 210979117Sdd product(uintx, PausePadding, 1, \ 211079117Sdd "How much buffer to keep for pause time") \ 211179117Sdd \ 211296622Siedowse product(uintx, PromotedPadding, 3, \ 211396622Siedowse "How much buffer to keep for promotion failure") \ 211496622Siedowse \ 211596622Siedowse product(uintx, SurvivorPadding, 3, \ 211696622Siedowse "How much buffer to keep for survivor overflow") \ 21171558Srgrimes \ 211896622Siedowse product(uintx, AdaptivePermSizeWeight, 20, \ 211996622Siedowse "Weight for perm gen exponential resizing, between 0 and 100") \ 212096622Siedowse \ 21211558Srgrimes product(uintx, PermGenPadding, 3, \ 21221558Srgrimes "How much buffer to keep for perm gen sizing") \ 21231558Srgrimes \ 21241558Srgrimes product(uintx, ThresholdTolerance, 10, \ 21251558Srgrimes "Allowed collection cost difference between generations") \ 21261558Srgrimes \ 21271558Srgrimes product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 21281558Srgrimes "If collection costs are within margin, reduce both by full " \ 21291558Srgrimes "delta") \ 21301558Srgrimes \ 213172650Sgreen product(uintx, YoungGenerationSizeIncrement, 20, \ 21321558Srgrimes "Adaptive size percentage change in young generation") \ 21331558Srgrimes \ 21341558Srgrimes product(uintx, YoungGenerationSizeSupplement, 80, \ 21351558Srgrimes "Supplement to YoungedGenerationSizeIncrement used at startup") \ 21361558Srgrimes \ 21371558Srgrimes product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2138136051Sstefanf "Decay factor to YoungedGenerationSizeSupplement") \ 2139136051Sstefanf \ 21401558Srgrimes product(uintx, TenuredGenerationSizeIncrement, 20, \ 214191354Sdd "Adaptive size percentage change in tenured generation") \ 21421558Srgrimes \ 214337663Scharnier product(uintx, TenuredGenerationSizeSupplement, 80, \ 21441558Srgrimes "Supplement to TenuredGenerationSizeIncrement used at startup") \ 21451558Srgrimes \ 21461558Srgrimes product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 21471558Srgrimes "Decay factor to TenuredGenerationSizeIncrement") \ 21481558Srgrimes \ 21491558Srgrimes product(uintx, MaxGCPauseMillis, max_uintx, \ 21501558Srgrimes "Adaptive size policy maximum GC pause time goal in msec, " \ 21511558Srgrimes "or (G1 Only) the max. GC time per MMU time slice") \ 21521558Srgrimes \ 21531558Srgrimes product(uintx, GCPauseIntervalMillis, 0, \ 21541558Srgrimes "Time slice for MMU specification") \ 21551558Srgrimes \ 21561558Srgrimes product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 21571558Srgrimes "Adaptive size policy maximum GC minor pause time goal in msec") \ 21581558Srgrimes \ 21591558Srgrimes product(uintx, GCTimeRatio, 99, \ 21601558Srgrimes "Adaptive size policy application time to GC time ratio") \ 21611558Srgrimes \ 216237663Scharnier product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 21631558Srgrimes "Adaptive size scale down factor for shrinking") \ 21641558Srgrimes \ 21651558Srgrimes product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 21661558Srgrimes "Adaptive size decays the major cost for long major intervals") \ 21671558Srgrimes \ 216837663Scharnier product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 21691558Srgrimes "Time scale over which major costs decay") \ 2170136051Sstefanf \ 21711558Srgrimes product(uintx, MinSurvivorRatio, 3, \ 21721558Srgrimes "Minimum ratio of young generation/survivor space size") \ 21731558Srgrimes \ 21741558Srgrimes product(uintx, InitialSurvivorRatio, 8, \ 21751558Srgrimes "Initial ratio of eden/survivor space size") \ 21761558Srgrimes \ 21771558Srgrimes product(uintx, BaseFootPrintEstimate, 256*M, \ 21781558Srgrimes "Estimate of footprint other than Java Heap") \ 21791558Srgrimes \ 21801558Srgrimes product(bool, UseGCOverheadLimit, true, \ 21811558Srgrimes "Use policy to limit of proportion of time spent in GC " \ 21821558Srgrimes "before an OutOfMemory error is thrown") \ 21831558Srgrimes \ 21841558Srgrimes product(uintx, GCTimeLimit, 98, \ 21851558Srgrimes "Limit of proportion of time spent in GC before an OutOfMemory" \ 21861558Srgrimes "error is thrown (used with GCHeapFreeLimit)") \ 218737663Scharnier \ 21881558Srgrimes product(uintx, GCHeapFreeLimit, 2, \ 21891558Srgrimes "Minimum percentage of free space after a full GC before an " \ 21901558Srgrimes "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 21911558Srgrimes \ 21921558Srgrimes develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 21931558Srgrimes "Number of consecutive collections before gc time limit fires") \ 21941558Srgrimes \ 21951558Srgrimes product(bool, PrintAdaptiveSizePolicy, false, \ 21961558Srgrimes "Print information about AdaptiveSizePolicy") \ 219737663Scharnier \ 21981558Srgrimes product(intx, PrefetchCopyIntervalInBytes, -1, \ 21991558Srgrimes "How far ahead to prefetch destination area (<= 0 means off)") \ 22001558Srgrimes \ 22011558Srgrimes product(intx, PrefetchScanIntervalInBytes, -1, \ 22021558Srgrimes "How far ahead to prefetch scan area (<= 0 means off)") \ 22031558Srgrimes \ 220437663Scharnier product(intx, PrefetchFieldsAhead, -1, \ 22051558Srgrimes "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 22061558Srgrimes \ 22071558Srgrimes develop(bool, UsePrefetchQueue, true, \ 22081558Srgrimes "Use the prefetch queue during PS promotion") \ 22091558Srgrimes \ 22101558Srgrimes diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 22111558Srgrimes "Verify system before exiting") \ 22121558Srgrimes \ 22131558Srgrimes diagnostic(bool, VerifyBeforeGC, false, \ 22141558Srgrimes "Verify memory system before GC") \ 221523681Speter \ 22161558Srgrimes diagnostic(bool, VerifyAfterGC, false, \ 22171558Srgrimes "Verify memory system after GC") \ 22181558Srgrimes \ 22191558Srgrimes diagnostic(bool, VerifyDuringGC, false, \ 222053117Sbillf "Verify memory system during GC (between phases)") \ 222153117Sbillf \ 222253117Sbillf diagnostic(bool, GCParallelVerificationEnabled, true, \ 222353117Sbillf "Enable parallel memory system verification") \ 222453117Sbillf \ 222553117Sbillf diagnostic(bool, DeferInitialCardMark, false, \ 22261558Srgrimes "When +ReduceInitialCardMarks, explicitly defer any that " \ 22271558Srgrimes "may arise from new_pre_store_barrier") \ 22281558Srgrimes \ 222923681Speter diagnostic(bool, VerifyRememberedSets, false, \ 223023681Speter "Verify GC remembered sets") \ 223123681Speter \ 223223681Speter diagnostic(bool, VerifyObjectStartArray, true, \ 22331558Srgrimes "Verify GC object start array if verify before/after") \ 22341558Srgrimes \ 223537663Scharnier product(bool, DisableExplicitGC, false, \ 223637663Scharnier "Tells whether calling System.gc() does a full GC") \ 223723681Speter \ 223823681Speter notproduct(bool, CheckMemoryInitialization, false, \ 223923681Speter "Checks memory initialization") \ 224023681Speter \ 22411558Srgrimes product(bool, CollectGen0First, false, \ 22421558Srgrimes "Collect youngest generation before each full GC") \ 22431558Srgrimes \ 22441558Srgrimes diagnostic(bool, BindCMSThreadToCPU, false, \ 22451558Srgrimes "Bind CMS Thread to CPU if possible") \ 22461558Srgrimes \ 22471558Srgrimes diagnostic(uintx, CPUForCMSThread, 0, \ 224875635Siedowse "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 224975635Siedowse \ 22501558Srgrimes product(bool, BindGCTaskThreadsToCPUs, false, \ 22511558Srgrimes "Bind GCTaskThreads to CPUs if possible") \ 22521558Srgrimes \ 22531558Srgrimes product(bool, UseGCTaskAffinity, false, \ 22541558Srgrimes "Use worker affinity when asking for GCTasks") \ 22551558Srgrimes \ 22561558Srgrimes product(uintx, ProcessDistributionStride, 4, \ 22571558Srgrimes "Stride through processors when distributing processes") \ 22581558Srgrimes \ 22591558Srgrimes product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 22601558Srgrimes "number of times the coordinator GC thread will sleep while " \ 22611558Srgrimes "yielding before giving up and resuming GC") \ 22621558Srgrimes \ 22631558Srgrimes product(uintx, CMSYieldSleepCount, 0, \ 22641558Srgrimes "number of times a GC thread (minus the coordinator) " \ 22651558Srgrimes "will sleep while yielding before giving up and resuming GC") \ 22661558Srgrimes \ 22671558Srgrimes /* gc tracing */ \ 22681558Srgrimes manageable(bool, PrintGC, false, \ 22691558Srgrimes "Print message at garbage collect") \ 22701558Srgrimes \ 22711558Srgrimes manageable(bool, PrintGCDetails, false, \ 227237663Scharnier "Print more details at garbage collect") \ 22731558Srgrimes \ 22741558Srgrimes manageable(bool, PrintGCDateStamps, false, \ 22751558Srgrimes "Print date stamps at garbage collect") \ 22761558Srgrimes \ 22771558Srgrimes manageable(bool, PrintGCTimeStamps, false, \ 22781558Srgrimes "Print timestamps at garbage collect") \ 22791558Srgrimes \ 22801558Srgrimes product(bool, PrintGCTaskTimeStamps, false, \ 22811558Srgrimes "Print timestamps for individual gc worker thread tasks") \ 22821558Srgrimes \ 22831558Srgrimes develop(intx, ConcGCYieldTimeout, 0, \ 22841558Srgrimes "If non-zero, assert that GC threads yield within this # of ms.") \ 22851558Srgrimes \ 22861558Srgrimes notproduct(bool, TraceMarkSweep, false, \ 22871558Srgrimes "Trace mark sweep") \ 22881558Srgrimes \ 22891558Srgrimes product(bool, PrintReferenceGC, false, \ 22901558Srgrimes "Print times spent handling reference objects during GC " \ 22911558Srgrimes " (enabled only when PrintGCDetails)") \ 22921558Srgrimes \ 22931558Srgrimes develop(bool, TraceReferenceGC, false, \ 22941558Srgrimes "Trace handling of soft/weak/final/phantom references") \ 22951558Srgrimes \ 22961558Srgrimes develop(bool, TraceFinalizerRegistration, false, \ 22971558Srgrimes "Trace registration of final references") \ 22981558Srgrimes \ 22991558Srgrimes notproduct(bool, TraceScavenge, false, \ 230037663Scharnier "Trace scavenge") \ 230137663Scharnier \ 23021558Srgrimes product_rw(bool, TraceClassLoading, false, \ 23031558Srgrimes "Trace all classes loaded") \ 23041558Srgrimes \ 23051558Srgrimes product(bool, TraceClassLoadingPreorder, false, \ 23061558Srgrimes "Trace all classes loaded in order referenced (not loaded)") \ 23071558Srgrimes \ 23081558Srgrimes product_rw(bool, TraceClassUnloading, false, \ 230937663Scharnier "Trace unloading of classes") \ 23101558Srgrimes \ 23111558Srgrimes product_rw(bool, TraceLoaderConstraints, false, \ 23121558Srgrimes "Trace loader constraints") \ 23131558Srgrimes \ 23141558Srgrimes product(bool, TraceGen0Time, false, \ 23151558Srgrimes "Trace accumulated time for Gen 0 collection") \ 23161558Srgrimes \ 23171558Srgrimes product(bool, TraceGen1Time, false, \ 23181558Srgrimes "Trace accumulated time for Gen 1 collection") \ 23191558Srgrimes \ 23201558Srgrimes product(bool, PrintTenuringDistribution, false, \ 23211558Srgrimes "Print tenuring age information") \ 23221558Srgrimes \ 23231558Srgrimes product_rw(bool, PrintHeapAtGC, false, \ 232474462Salfred "Print heap layout before and after each GC") \ 232574462Salfred \ 23261558Srgrimes product_rw(bool, PrintHeapAtGCExtended, false, \ 23271558Srgrimes "Prints extended information about the layout of the heap " \ 23281558Srgrimes "when -XX:+PrintHeapAtGC is set") \ 23291558Srgrimes \ 23301558Srgrimes product(bool, PrintHeapAtSIGBREAK, true, \ 23311558Srgrimes "Print heap layout in response to SIGBREAK") \ 23321558Srgrimes \ 23331558Srgrimes manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 23341558Srgrimes "Print a class histogram before any major stop-world GC") \ 23351558Srgrimes \ 23361558Srgrimes manageable(bool, PrintClassHistogramAfterFullGC, false, \ 23371558Srgrimes "Print a class histogram after any major stop-world GC") \ 23381558Srgrimes \ 23391558Srgrimes manageable(bool, PrintClassHistogram, false, \ 23401558Srgrimes "Print a histogram of class instances") \ 23411558Srgrimes \ 23421558Srgrimes develop(bool, TraceWorkGang, false, \ 23431558Srgrimes "Trace activities of work gangs") \ 23441558Srgrimes \ 23451558Srgrimes product(bool, TraceParallelOldGCTasks, false, \ 23461558Srgrimes "Trace multithreaded GC activity") \ 23471558Srgrimes \ 23481558Srgrimes develop(bool, TraceBlockOffsetTable, false, \ 23491558Srgrimes "Print BlockOffsetTable maps") \ 23501558Srgrimes \ 23511558Srgrimes develop(bool, TraceCardTableModRefBS, false, \ 23521558Srgrimes "Print CardTableModRefBS maps") \ 23531558Srgrimes \ 23541558Srgrimes develop(bool, TraceGCTaskManager, false, \ 235583653Speter "Trace actions of the GC task manager") \ 235683653Speter \ 23571558Srgrimes develop(bool, TraceGCTaskQueue, false, \ 23581558Srgrimes "Trace actions of the GC task queues") \ 23591558Srgrimes \ 236075801Siedowse develop(bool, TraceGCTaskThread, false, \ 236175801Siedowse "Trace actions of the GC task threads") \ 23621558Srgrimes \ 236375801Siedowse product(bool, PrintParallelOldGCPhaseTimes, false, \ 236475801Siedowse "Print the time taken by each parallel old gc phase." \ 236575801Siedowse "PrintGCDetails must also be enabled.") \ 236675801Siedowse \ 236775801Siedowse develop(bool, TraceParallelOldGCMarkingPhase, false, \ 236875801Siedowse "Trace parallel old gc marking phase") \ 236975801Siedowse \ 237075801Siedowse develop(bool, TraceParallelOldGCSummaryPhase, false, \ 23711558Srgrimes "Trace parallel old gc summary phase") \ 237245927Salex \ 23731558Srgrimes develop(bool, TraceParallelOldGCCompactionPhase, false, \ 23741558Srgrimes "Trace parallel old gc compaction phase") \ 23751558Srgrimes \ 23761558Srgrimes develop(bool, TraceParallelOldGCDensePrefix, false, \ 23771558Srgrimes "Trace parallel old gc dense prefix computation") \ 23781558Srgrimes \ 23791558Srgrimes develop(bool, IgnoreLibthreadGPFault, false, \ 23801558Srgrimes "Suppress workaround for libthread GP fault") \ 23811558Srgrimes \ 23821558Srgrimes product(bool, PrintJNIGCStalls, false, \ 23831558Srgrimes "Print diagnostic message when GC is stalled" \ 23841558Srgrimes "by JNI critical section") \ 23851558Srgrimes \ 23861558Srgrimes /* GC log rotation setting */ \ 23871558Srgrimes \ 23881558Srgrimes product(bool, UseGCLogFileRotation, false, \ 23891558Srgrimes "Prevent large gclog file for long running app. " \ 23901558Srgrimes "Requires -Xloggc:<filename>") \ 23911558Srgrimes \ 23921558Srgrimes product(uintx, NumberOfGCLogFiles, 0, \ 23939336Sdfr "Number of gclog files in rotation, " \ 23941558Srgrimes "Default: 0, no rotation") \ 23951558Srgrimes \ 23961558Srgrimes product(uintx, GCLogFileSize, 0, \ 23971558Srgrimes "GC log file size, Default: 0 bytes, no rotation " \ 23981558Srgrimes "Only valid with UseGCLogFileRotation") \ 23999336Sdfr \ 24001558Srgrimes /* JVMTI heap profiling */ \ 24011558Srgrimes \ 24021558Srgrimes diagnostic(bool, TraceJVMTIObjectTagging, false, \ 24039336Sdfr "Trace JVMTI object tagging calls") \ 240475801Siedowse \ 240575801Siedowse diagnostic(bool, VerifyBeforeIteration, false, \ 240675801Siedowse "Verify memory system before JVMTI iteration") \ 240775801Siedowse \ 240875801Siedowse /* compiler interface */ \ 240975801Siedowse \ 241074462Salfred develop(bool, CIPrintCompilerName, false, \ 241175801Siedowse "when CIPrint is active, print the name of the active compiler") \ 241275801Siedowse \ 241374462Salfred develop(bool, CIPrintCompileQueue, false, \ 241475801Siedowse "display the contents of the compile queue whenever a " \ 241575801Siedowse "compilation is enqueued") \ 2416103949Smike \ 241775801Siedowse develop(bool, CIPrintRequests, false, \ 241874462Salfred "display every request for compilation") \ 241975801Siedowse \ 2420103949Smike product(bool, CITime, false, \ 242175801Siedowse "collect timing information for compilation") \ 242275801Siedowse \ 242374462Salfred develop(bool, CITimeEach, false, \ 242475801Siedowse "display timing information after each successful compilation") \ 242574462Salfred \ 242674462Salfred develop(bool, CICountOSR, true, \ 242775801Siedowse "use a separate counter when assigning ids to osr compilations") \ 242875801Siedowse \ 242975801Siedowse develop(bool, CICompileNatives, true, \ 243075801Siedowse "compile native methods if supported by the compiler") \ 243175801Siedowse \ 243275801Siedowse develop_pd(bool, CICompileOSR, \ 243374462Salfred "compile on stack replacement methods if supported by the " \ 243475801Siedowse "compiler") \ 243575801Siedowse \ 243674462Salfred develop(bool, CIPrintMethodCodes, false, \ 243775801Siedowse "print method bytecodes of the compiled code") \ 243875801Siedowse \ 243975801Siedowse develop(bool, CIPrintTypeFlow, false, \ 244075801Siedowse "print the results of ciTypeFlow analysis") \ 244175801Siedowse \ 244275801Siedowse develop(bool, CITraceTypeFlow, false, \ 244375801Siedowse "detailed per-bytecode tracing of ciTypeFlow analysis") \ 244475801Siedowse \ 244575801Siedowse develop(intx, CICloneLoopTestLimit, 100, \ 244675801Siedowse "size limit for blocks heuristically cloned in ciTypeFlow") \ 244774462Salfred \ 244875801Siedowse develop(intx, OSROnlyBCI, -1, \ 244975801Siedowse "OSR only at this bci. Negative values mean exclude that bci") \ 245075801Siedowse \ 245175801Siedowse /* temp diagnostics */ \ 245274462Salfred \ 245374462Salfred diagnostic(bool, TraceRedundantCompiles, false, \ 245475801Siedowse "Have compile broker print when a request already in the queue is"\ 245575801Siedowse " requested again") \ 245675801Siedowse \ 245775801Siedowse diagnostic(bool, InitialCompileFast, false, \ 245875801Siedowse "Initial compile at CompLevel_fast_compile") \ 245975801Siedowse \ 246075801Siedowse diagnostic(bool, InitialCompileReallyFast, false, \ 246174462Salfred "Initial compile at CompLevel_really_fast_compile (no profile)") \ 246275801Siedowse \ 246375801Siedowse diagnostic(bool, FullProfileOnReInterpret, true, \ 246474462Salfred "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 246575801Siedowse \ 246675801Siedowse /* compiler */ \ 246775801Siedowse \ 246875801Siedowse product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 246975801Siedowse "Number of compiler threads to run") \ 247075801Siedowse \ 247174462Salfred product(intx, CompilationPolicyChoice, 0, \ 247275801Siedowse "which compilation policy (0/1)") \ 247375801Siedowse \ 247475801Siedowse develop(bool, UseStackBanging, true, \ 247574462Salfred "use stack banging for stack overflow checks (required for " \ 247674462Salfred "proper StackOverflow handling; disable only to measure cost " \ 247774462Salfred "of stackbanging)") \ 247875801Siedowse \ 247975801Siedowse develop(bool, Use24BitFPMode, true, \ 248075801Siedowse "Set 24-bit FPU mode on a per-compile basis ") \ 248174462Salfred \ 248275801Siedowse develop(bool, Use24BitFP, true, \ 248375801Siedowse "use FP instructions that produce 24-bit precise results") \ 248475801Siedowse \ 248575801Siedowse develop(bool, UseStrictFP, true, \ 248674462Salfred "use strict fp if modifier strictfp is set") \ 248775801Siedowse \ 248875801Siedowse develop(bool, GenerateSynchronizationCode, true, \ 248975801Siedowse "generate locking/unlocking code for synchronized methods and " \ 249075801Siedowse "monitors") \ 249174462Salfred \ 249274462Salfred develop(bool, GenerateCompilerNullChecks, true, \ 249375801Siedowse "Generate explicit null checks for loads/stores/calls") \ 249475801Siedowse \ 249575801Siedowse develop(bool, GenerateRangeChecks, true, \ 249675801Siedowse "Generate range checks for array accesses") \ 249775801Siedowse \ 249875801Siedowse develop_pd(bool, ImplicitNullChecks, \ 249975801Siedowse "generate code for implicit null checks") \ 250075801Siedowse \ 250174462Salfred product(bool, PrintSafepointStatistics, false, \ 250274462Salfred "print statistics about safepoint synchronization") \ 250375801Siedowse \ 250474462Salfred product(intx, PrintSafepointStatisticsCount, 300, \ 250575801Siedowse "total number of safepoint statistics collected " \ 250675801Siedowse "before printing them out") \ 250774462Salfred \ 250874462Salfred product(intx, PrintSafepointStatisticsTimeout, -1, \ 250975801Siedowse "print safepoint statistics only when safepoint takes" \ 251075801Siedowse " more than PrintSafepointSatisticsTimeout in millis") \ 251174462Salfred \ 251274462Salfred product(bool, TraceSafepointCleanupTime, false, \ 251375801Siedowse "print the break down of clean up tasks performed during" \ 251475801Siedowse " safepoint") \ 251574462Salfred \ 251674462Salfred develop(bool, InlineAccessors, true, \ 251775801Siedowse "inline accessor methods (get/set)") \ 251875801Siedowse \ 251975801Siedowse product(bool, Inline, true, \ 252074462Salfred "enable inlining") \ 252174462Salfred \ 252275754Siedowse product(bool, ClipInlining, true, \ 252375754Siedowse "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 252475754Siedowse \ 252575754Siedowse develop(bool, UseCHA, true, \ 252675754Siedowse "enable CHA") \ 252775754Siedowse \ 252874462Salfred product(bool, UseTypeProfile, true, \ 252974462Salfred "Check interpreter profile for historically monomorphic calls") \ 253074462Salfred \ 2531149433Spjd product(intx, TypeProfileMajorReceiverPercent, 90, \ 253274792Salfred "% of major receiver type to all profiled receivers") \ 253374792Salfred \ 253474462Salfred notproduct(bool, TimeCompiler, false, \ 253574462Salfred "time the compiler") \ 2536 \ 2537 notproduct(bool, TimeCompiler2, false, \ 2538 "detailed time the compiler (requires +TimeCompiler)") \ 2539 \ 2540 diagnostic(bool, PrintInlining, false, \ 2541 "prints inlining optimizations") \ 2542 \ 2543 diagnostic(bool, PrintIntrinsics, false, \ 2544 "prints attempted and successful inlining of intrinsics") \ 2545 \ 2546 product(bool, UseCountLeadingZerosInstruction, false, \ 2547 "Use count leading zeros instruction") \ 2548 \ 2549 product(bool, UsePopCountInstruction, false, \ 2550 "Use population count instruction") \ 2551 \ 2552 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2553 "do not expand intrinsics whose (internal) names appear here") \ 2554 \ 2555 develop(bool, StressReflectiveCode, false, \ 2556 "Use inexact types at allocations, etc., to test reflection") \ 2557 \ 2558 develop(bool, EagerInitialization, false, \ 2559 "Eagerly initialize classes if possible") \ 2560 \ 2561 develop(bool, TraceMethodReplacement, false, \ 2562 "Print when methods are replaced do to recompilation") \ 2563 \ 2564 develop(bool, PrintMethodFlushing, false, \ 2565 "print the nmethods being flushed") \ 2566 \ 2567 notproduct(bool, LogMultipleMutexLocking, false, \ 2568 "log locking and unlocking of mutexes (only if multiple locks " \ 2569 "are held)") \ 2570 \ 2571 develop(bool, UseRelocIndex, false, \ 2572 "use an index to speed random access to relocations") \ 2573 \ 2574 develop(bool, StressCodeBuffers, false, \ 2575 "Exercise code buffer expansion and other rare state changes") \ 2576 \ 2577 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2578 "Generate extra debugging info for non-safepoints in nmethods") \ 2579 \ 2580 diagnostic(bool, DebugInlinedCalls, true, \ 2581 "If false, restricts profiled locations to the root method only") \ 2582 \ 2583 product(bool, PrintVMOptions, false, \ 2584 "Print flags that appeared on the command line") \ 2585 \ 2586 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2587 "Ignore unrecognized VM options") \ 2588 \ 2589 product(bool, PrintCommandLineFlags, false, \ 2590 "Print flags specified on command line or set by ergonomics") \ 2591 \ 2592 product(bool, PrintFlagsInitial, false, \ 2593 "Print all VM flags before argument processing and exit VM") \ 2594 \ 2595 product(bool, PrintFlagsFinal, false, \ 2596 "Print all VM flags after argument and ergonomic processing") \ 2597 \ 2598 notproduct(bool, PrintFlagsWithComments, false, \ 2599 "Print all VM flags with default values and descriptions and exit")\ 2600 \ 2601 diagnostic(bool, SerializeVMOutput, true, \ 2602 "Use a mutex to serialize output to tty and hotspot.log") \ 2603 \ 2604 diagnostic(bool, DisplayVMOutput, true, \ 2605 "Display all VM output on the tty, independently of LogVMOutput") \ 2606 \ 2607 diagnostic(bool, LogVMOutput, trueInDebug, \ 2608 "Save VM output to hotspot.log, or to LogFile") \ 2609 \ 2610 diagnostic(ccstr, LogFile, NULL, \ 2611 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2612 \ 2613 product(ccstr, ErrorFile, NULL, \ 2614 "If an error occurs, save the error data to this file " \ 2615 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2616 \ 2617 product(bool, DisplayVMOutputToStderr, false, \ 2618 "If DisplayVMOutput is true, display all VM output to stderr") \ 2619 \ 2620 product(bool, DisplayVMOutputToStdout, false, \ 2621 "If DisplayVMOutput is true, display all VM output to stdout") \ 2622 \ 2623 product(bool, UseHeavyMonitors, false, \ 2624 "use heavyweight instead of lightweight Java monitors") \ 2625 \ 2626 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2627 "print histogram of the symbol table") \ 2628 \ 2629 notproduct(bool, ExitVMOnVerifyError, false, \ 2630 "standard exit from VM if bytecode verify error " \ 2631 "(only in debug mode)") \ 2632 \ 2633 notproduct(ccstr, AbortVMOnException, NULL, \ 2634 "Call fatal if this exception is thrown. Example: " \ 2635 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2636 \ 2637 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2638 "Call fatal if the exception pointed by AbortVMOnException " \ 2639 "has this message.") \ 2640 \ 2641 develop(bool, DebugVtables, false, \ 2642 "add debugging code to vtable dispatch") \ 2643 \ 2644 develop(bool, PrintVtables, false, \ 2645 "print vtables when printing klass") \ 2646 \ 2647 notproduct(bool, PrintVtableStats, false, \ 2648 "print vtables stats at end of run") \ 2649 \ 2650 develop(bool, TraceCreateZombies, false, \ 2651 "trace creation of zombie nmethods") \ 2652 \ 2653 notproduct(bool, IgnoreLockingAssertions, false, \ 2654 "disable locking assertions (for speed)") \ 2655 \ 2656 notproduct(bool, VerifyLoopOptimizations, false, \ 2657 "verify major loop optimizations") \ 2658 \ 2659 product(bool, RangeCheckElimination, true, \ 2660 "Split loop iterations to eliminate range checks") \ 2661 \ 2662 develop_pd(bool, UncommonNullCast, \ 2663 "track occurrences of null in casts; adjust compiler tactics") \ 2664 \ 2665 develop(bool, TypeProfileCasts, true, \ 2666 "treat casts like calls for purposes of type profiling") \ 2667 \ 2668 develop(bool, MonomorphicArrayCheck, true, \ 2669 "Uncommon-trap array store checks that require full type check") \ 2670 \ 2671 diagnostic(bool, ProfileDynamicTypes, true, \ 2672 "do extra type profiling and use it more aggressively") \ 2673 \ 2674 develop(bool, DelayCompilationDuringStartup, true, \ 2675 "Delay invoking the compiler until main application class is " \ 2676 "loaded") \ 2677 \ 2678 develop(bool, CompileTheWorld, false, \ 2679 "Compile all methods in all classes in bootstrap class path " \ 2680 "(stress test)") \ 2681 \ 2682 develop(bool, CompileTheWorldPreloadClasses, true, \ 2683 "Preload all classes used by a class before start loading") \ 2684 \ 2685 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2686 "Force a safepoint every n compiles so sweeper can keep up") \ 2687 \ 2688 develop(bool, TraceIterativeGVN, false, \ 2689 "Print progress during Iterative Global Value Numbering") \ 2690 \ 2691 develop(bool, FillDelaySlots, true, \ 2692 "Fill delay slots (on SPARC only)") \ 2693 \ 2694 develop(bool, VerifyIterativeGVN, false, \ 2695 "Verify Def-Use modifications during sparse Iterative Global " \ 2696 "Value Numbering") \ 2697 \ 2698 notproduct(bool, TracePhaseCCP, false, \ 2699 "Print progress during Conditional Constant Propagation") \ 2700 \ 2701 develop(bool, TimeLivenessAnalysis, false, \ 2702 "Time computation of bytecode liveness analysis") \ 2703 \ 2704 develop(bool, TraceLivenessGen, false, \ 2705 "Trace the generation of liveness analysis information") \ 2706 \ 2707 notproduct(bool, TraceLivenessQuery, false, \ 2708 "Trace queries of liveness analysis information") \ 2709 \ 2710 notproduct(bool, CollectIndexSetStatistics, false, \ 2711 "Collect information about IndexSets") \ 2712 \ 2713 develop(bool, PrintDominators, false, \ 2714 "Print out dominator trees for GVN") \ 2715 \ 2716 develop(bool, UseLoopSafepoints, true, \ 2717 "Generate Safepoint nodes in every loop") \ 2718 \ 2719 notproduct(bool, TraceCISCSpill, false, \ 2720 "Trace allocators use of cisc spillable instructions") \ 2721 \ 2722 notproduct(bool, TraceSpilling, false, \ 2723 "Trace spilling") \ 2724 \ 2725 product(bool, SplitIfBlocks, true, \ 2726 "Clone compares and control flow through merge points to fold " \ 2727 "some branches") \ 2728 \ 2729 develop(intx, FastAllocateSizeLimit, 128*K, \ 2730 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2731 "Inline allocations larger than this in doublewords must go slow")\ 2732 \ 2733 product(bool, AggressiveOpts, false, \ 2734 "Enable aggressive optimizations - see arguments.cpp") \ 2735 \ 2736 product(bool, UseStringCache, false, \ 2737 "Enable String cache capabilities on String.java") \ 2738 \ 2739 /* statistics */ \ 2740 develop(bool, CountCompiledCalls, false, \ 2741 "counts method invocations") \ 2742 \ 2743 notproduct(bool, CountRuntimeCalls, false, \ 2744 "counts VM runtime calls") \ 2745 \ 2746 develop(bool, CountJNICalls, false, \ 2747 "counts jni method invocations") \ 2748 \ 2749 notproduct(bool, CountJVMCalls, false, \ 2750 "counts jvm method invocations") \ 2751 \ 2752 notproduct(bool, CountRemovableExceptions, false, \ 2753 "count exceptions that could be replaced by branches due to " \ 2754 "inlining") \ 2755 \ 2756 notproduct(bool, ICMissHistogram, false, \ 2757 "produce histogram of IC misses") \ 2758 \ 2759 notproduct(bool, PrintClassStatistics, false, \ 2760 "prints class statistics at end of run") \ 2761 \ 2762 notproduct(bool, PrintMethodStatistics, false, \ 2763 "prints method statistics at end of run") \ 2764 \ 2765 /* interpreter */ \ 2766 develop(bool, ClearInterpreterLocals, false, \ 2767 "Always clear local variables of interpreter activations upon " \ 2768 "entry") \ 2769 \ 2770 product_pd(bool, RewriteBytecodes, \ 2771 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2772 \ 2773 product_pd(bool, RewriteFrequentPairs, \ 2774 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2775 \ 2776 diagnostic(bool, PrintInterpreter, false, \ 2777 "Prints the generated interpreter code") \ 2778 \ 2779 product(bool, UseInterpreter, true, \ 2780 "Use interpreter for non-compiled methods") \ 2781 \ 2782 develop(bool, UseFastSignatureHandlers, true, \ 2783 "Use fast signature handlers for native calls") \ 2784 \ 2785 develop(bool, UseV8InstrsOnly, false, \ 2786 "Use SPARC-V8 Compliant instruction subset") \ 2787 \ 2788 product(bool, UseNiagaraInstrs, false, \ 2789 "Use Niagara-efficient instruction subset") \ 2790 \ 2791 develop(bool, UseCASForSwap, false, \ 2792 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2793 \ 2794 product(bool, UseLoopCounter, true, \ 2795 "Increment invocation counter on backward branch") \ 2796 \ 2797 product(bool, UseFastEmptyMethods, true, \ 2798 "Use fast method entry code for empty methods") \ 2799 \ 2800 product(bool, UseFastAccessorMethods, true, \ 2801 "Use fast method entry code for accessor methods") \ 2802 \ 2803 product_pd(bool, UseOnStackReplacement, \ 2804 "Use on stack replacement, calls runtime if invoc. counter " \ 2805 "overflows in loop") \ 2806 \ 2807 notproduct(bool, TraceOnStackReplacement, false, \ 2808 "Trace on stack replacement") \ 2809 \ 2810 develop(bool, PoisonOSREntry, true, \ 2811 "Detect abnormal calls to OSR code") \ 2812 \ 2813 product_pd(bool, PreferInterpreterNativeStubs, \ 2814 "Use always interpreter stubs for native methods invoked via " \ 2815 "interpreter") \ 2816 \ 2817 develop(bool, CountBytecodes, false, \ 2818 "Count number of bytecodes executed") \ 2819 \ 2820 develop(bool, PrintBytecodeHistogram, false, \ 2821 "Print histogram of the executed bytecodes") \ 2822 \ 2823 develop(bool, PrintBytecodePairHistogram, false, \ 2824 "Print histogram of the executed bytecode pairs") \ 2825 \ 2826 diagnostic(bool, PrintSignatureHandlers, false, \ 2827 "Print code generated for native method signature handlers") \ 2828 \ 2829 develop(bool, VerifyOops, false, \ 2830 "Do plausibility checks for oops") \ 2831 \ 2832 develop(bool, CheckUnhandledOops, false, \ 2833 "Check for unhandled oops in VM code") \ 2834 \ 2835 develop(bool, VerifyJNIFields, trueInDebug, \ 2836 "Verify jfieldIDs for instance fields") \ 2837 \ 2838 notproduct(bool, VerifyJNIEnvThread, false, \ 2839 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2840 "from JNI") \ 2841 \ 2842 develop(bool, VerifyFPU, false, \ 2843 "Verify FPU state (check for NaN's, etc.)") \ 2844 \ 2845 develop(bool, VerifyThread, false, \ 2846 "Watch the thread register for corruption (SPARC only)") \ 2847 \ 2848 develop(bool, VerifyActivationFrameSize, false, \ 2849 "Verify that activation frame didn't become smaller than its " \ 2850 "minimal size") \ 2851 \ 2852 develop(bool, TraceFrequencyInlining, false, \ 2853 "Trace frequency based inlining") \ 2854 \ 2855 notproduct(bool, TraceTypeProfile, false, \ 2856 "Trace type profile") \ 2857 \ 2858 develop_pd(bool, InlineIntrinsics, \ 2859 "Inline intrinsics that can be statically resolved") \ 2860 \ 2861 product_pd(bool, ProfileInterpreter, \ 2862 "Profile at the bytecode level during interpretation") \ 2863 \ 2864 develop_pd(bool, ProfileTraps, \ 2865 "Profile deoptimization traps at the bytecode level") \ 2866 \ 2867 product(intx, ProfileMaturityPercentage, 20, \ 2868 "number of method invocations/branches (expressed as % of " \ 2869 "CompileThreshold) before using the method's profile") \ 2870 \ 2871 develop(bool, PrintMethodData, false, \ 2872 "Print the results of +ProfileInterpreter at end of run") \ 2873 \ 2874 develop(bool, VerifyDataPointer, trueInDebug, \ 2875 "Verify the method data pointer during interpreter profiling") \ 2876 \ 2877 develop(bool, VerifyCompiledCode, false, \ 2878 "Include miscellaneous runtime verifications in nmethod code; " \ 2879 "default off because it disturbs nmethod size heuristics") \ 2880 \ 2881 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2882 "Manually make GC thread crash then dump java stack trace; " \ 2883 "Test only") \ 2884 \ 2885 /* compilation */ \ 2886 product(bool, UseCompiler, true, \ 2887 "use compilation") \ 2888 \ 2889 develop(bool, TraceCompilationPolicy, false, \ 2890 "Trace compilation policy") \ 2891 \ 2892 develop(bool, TimeCompilationPolicy, false, \ 2893 "Time the compilation policy") \ 2894 \ 2895 product(bool, UseCounterDecay, true, \ 2896 "adjust recompilation counters") \ 2897 \ 2898 develop(intx, CounterHalfLifeTime, 30, \ 2899 "half-life time of invocation counters (in secs)") \ 2900 \ 2901 develop(intx, CounterDecayMinIntervalLength, 500, \ 2902 "Min. ms. between invocation of CounterDecay") \ 2903 \ 2904 product(bool, AlwaysCompileLoopMethods, false, \ 2905 "when using recompilation, never interpret methods " \ 2906 "containing loops") \ 2907 \ 2908 product(bool, DontCompileHugeMethods, true, \ 2909 "don't compile methods > HugeMethodLimit") \ 2910 \ 2911 /* Bytecode escape analysis estimation. */ \ 2912 product(bool, EstimateArgEscape, true, \ 2913 "Analyze bytecodes to estimate escape state of arguments") \ 2914 \ 2915 product(intx, BCEATraceLevel, 0, \ 2916 "How much tracing to do of bytecode escape analysis estimates") \ 2917 \ 2918 product(intx, MaxBCEAEstimateLevel, 5, \ 2919 "Maximum number of nested calls that are analyzed by BC EA.") \ 2920 \ 2921 product(intx, MaxBCEAEstimateSize, 150, \ 2922 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2923 \ 2924 product(intx, AllocatePrefetchStyle, 1, \ 2925 "0 = no prefetch, " \ 2926 "1 = prefetch instructions for each allocation, " \ 2927 "2 = use TLAB watermark to gate allocation prefetch, " \ 2928 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2929 \ 2930 product(intx, AllocatePrefetchDistance, -1, \ 2931 "Distance to prefetch ahead of allocation pointer") \ 2932 \ 2933 product(intx, AllocatePrefetchLines, 3, \ 2934 "Number of lines to prefetch ahead of array allocation pointer") \ 2935 \ 2936 product(intx, AllocateInstancePrefetchLines, 1, \ 2937 "Number of lines to prefetch ahead of instance allocation pointer") \ 2938 \ 2939 product(intx, AllocatePrefetchStepSize, 16, \ 2940 "Step size in bytes of sequential prefetch instructions") \ 2941 \ 2942 product(intx, AllocatePrefetchInstr, 0, \ 2943 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2944 \ 2945 product(intx, ReadPrefetchInstr, 0, \ 2946 "Prefetch instruction to prefetch ahead") \ 2947 \ 2948 product(uintx, ArraycopySrcPrefetchDistance, 0, \ 2949 "Distance to prefetch source array in arracopy") \ 2950 \ 2951 product(uintx, ArraycopyDstPrefetchDistance, 0, \ 2952 "Distance to prefetch destination array in arracopy") \ 2953 \ 2954 /* deoptimization */ \ 2955 develop(bool, TraceDeoptimization, false, \ 2956 "Trace deoptimization") \ 2957 \ 2958 develop(bool, DebugDeoptimization, false, \ 2959 "Tracing various information while debugging deoptimization") \ 2960 \ 2961 product(intx, SelfDestructTimer, 0, \ 2962 "Will cause VM to terminate after a given time (in minutes) " \ 2963 "(0 means off)") \ 2964 \ 2965 product(intx, MaxJavaStackTraceDepth, 1024, \ 2966 "Max. no. of lines in the stack trace for Java exceptions " \ 2967 "(0 means all)") \ 2968 \ 2969 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2970 "Guarantee a safepoint (at least) every so many milliseconds " \ 2971 "(0 means none)")) \ 2972 \ 2973 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2974 "Guarantee a safepoint (at least) every so many milliseconds " \ 2975 "(0 means none)")) \ 2976 \ 2977 product(intx, SafepointTimeoutDelay, 10000, \ 2978 "Delay in milliseconds for option SafepointTimeout") \ 2979 \ 2980 product(intx, NmethodSweepFraction, 4, \ 2981 "Number of invocations of sweeper to cover all nmethods") \ 2982 \ 2983 product(intx, NmethodSweepCheckInterval, 5, \ 2984 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2985 \ 2986 notproduct(bool, LogSweeper, false, \ 2987 "Keep a ring buffer of sweeper activity") \ 2988 \ 2989 notproduct(intx, SweeperLogEntries, 1024, \ 2990 "Number of records in the ring buffer of sweeper activity") \ 2991 \ 2992 notproduct(intx, MemProfilingInterval, 500, \ 2993 "Time between each invocation of the MemProfiler") \ 2994 \ 2995 develop(intx, MallocCatchPtr, -1, \ 2996 "Hit breakpoint when mallocing/freeing this pointer") \ 2997 \ 2998 notproduct(intx, AssertRepeat, 1, \ 2999 "number of times to evaluate expression in assert " \ 3000 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 3001 \ 3002 notproduct(ccstrlist, SuppressErrorAt, "", \ 3003 "List of assertions (file:line) to muzzle") \ 3004 \ 3005 notproduct(uintx, HandleAllocationLimit, 1024, \ 3006 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3007 "is used") \ 3008 \ 3009 develop(uintx, TotalHandleAllocationLimit, 1024, \ 3010 "Threshold for total handle allocation when " \ 3011 "+TraceHandleAllocation is used") \ 3012 \ 3013 develop(intx, StackPrintLimit, 100, \ 3014 "number of stack frames to print in VM-level stack dump") \ 3015 \ 3016 notproduct(intx, MaxElementPrintSize, 256, \ 3017 "maximum number of elements to print") \ 3018 \ 3019 notproduct(intx, MaxSubklassPrintSize, 4, \ 3020 "maximum number of subklasses to print when printing klass") \ 3021 \ 3022 product(intx, MaxInlineLevel, 9, \ 3023 "maximum number of nested calls that are inlined") \ 3024 \ 3025 product(intx, MaxRecursiveInlineLevel, 1, \ 3026 "maximum number of nested recursive calls that are inlined") \ 3027 \ 3028 product_pd(intx, InlineSmallCode, \ 3029 "Only inline already compiled methods if their code size is " \ 3030 "less than this") \ 3031 \ 3032 product(intx, MaxInlineSize, 35, \ 3033 "maximum bytecode size of a method to be inlined") \ 3034 \ 3035 product_pd(intx, FreqInlineSize, \ 3036 "maximum bytecode size of a frequent method to be inlined") \ 3037 \ 3038 product(intx, MaxTrivialSize, 6, \ 3039 "maximum bytecode size of a trivial method to be inlined") \ 3040 \ 3041 product(intx, MinInliningThreshold, 250, \ 3042 "min. invocation count a method needs to have to be inlined") \ 3043 \ 3044 develop(intx, AlignEntryCode, 4, \ 3045 "aligns entry code to specified value (in bytes)") \ 3046 \ 3047 develop(intx, MethodHistogramCutoff, 100, \ 3048 "cutoff value for method invoc. histogram (+CountCalls)") \ 3049 \ 3050 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3051 "# of interpreted methods to show in profile") \ 3052 \ 3053 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3054 "# of compiled methods to show in profile") \ 3055 \ 3056 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3057 "# of stub methods to show in profile") \ 3058 \ 3059 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3060 "# of runtime stub nodes to show in profile") \ 3061 \ 3062 product(intx, ProfileIntervalsTicks, 100, \ 3063 "# of ticks between printing of interval profile " \ 3064 "(+ProfileIntervals)") \ 3065 \ 3066 notproduct(intx, ScavengeALotInterval, 1, \ 3067 "Interval between which scavenge will occur with +ScavengeALot") \ 3068 \ 3069 notproduct(intx, FullGCALotInterval, 1, \ 3070 "Interval between which full gc will occur with +FullGCALot") \ 3071 \ 3072 notproduct(intx, FullGCALotStart, 0, \ 3073 "For which invocation to start FullGCAlot") \ 3074 \ 3075 notproduct(intx, FullGCALotDummies, 32*K, \ 3076 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3077 "to move") \ 3078 \ 3079 develop(intx, DontYieldALotInterval, 10, \ 3080 "Interval between which yields will be dropped (milliseconds)") \ 3081 \ 3082 develop(intx, MinSleepInterval, 1, \ 3083 "Minimum sleep() interval (milliseconds) when " \ 3084 "ConvertSleepToYield is off (used for SOLARIS)") \ 3085 \ 3086 product(intx, EventLogLength, 2000, \ 3087 "maximum nof events in event log") \ 3088 \ 3089 develop(intx, ProfilerPCTickThreshold, 15, \ 3090 "Number of ticks in a PC buckets to be a hotspot") \ 3091 \ 3092 notproduct(intx, DeoptimizeALotInterval, 5, \ 3093 "Number of exits until DeoptimizeALot kicks in") \ 3094 \ 3095 notproduct(intx, ZombieALotInterval, 5, \ 3096 "Number of exits until ZombieALot kicks in") \ 3097 \ 3098 develop(bool, StressNonEntrant, false, \ 3099 "Mark nmethods non-entrant at registration") \ 3100 \ 3101 diagnostic(intx, MallocVerifyInterval, 0, \ 3102 "if non-zero, verify C heap after every N calls to " \ 3103 "malloc/realloc/free") \ 3104 \ 3105 diagnostic(intx, MallocVerifyStart, 0, \ 3106 "if non-zero, start verifying C heap after Nth call to " \ 3107 "malloc/realloc/free") \ 3108 \ 3109 product(intx, TypeProfileWidth, 2, \ 3110 "number of receiver types to record in call/cast profile") \ 3111 \ 3112 develop(intx, BciProfileWidth, 2, \ 3113 "number of return bci's to record in ret profile") \ 3114 \ 3115 product(intx, PerMethodRecompilationCutoff, 400, \ 3116 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3117 \ 3118 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3119 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3120 \ 3121 product(intx, PerMethodTrapLimit, 100, \ 3122 "Limit on traps (of one kind) in a method (includes inlines)") \ 3123 \ 3124 product(intx, PerBytecodeTrapLimit, 4, \ 3125 "Limit on traps (of one kind) at a particular BCI") \ 3126 \ 3127 develop(intx, FreqCountInvocations, 1, \ 3128 "Scaling factor for branch frequencies (deprecated)") \ 3129 \ 3130 develop(intx, InlineFrequencyRatio, 20, \ 3131 "Ratio of call site execution to caller method invocation") \ 3132 \ 3133 develop_pd(intx, InlineFrequencyCount, \ 3134 "Count of call site execution necessary to trigger frequent " \ 3135 "inlining") \ 3136 \ 3137 develop(intx, InlineThrowCount, 50, \ 3138 "Force inlining of interpreted methods that throw this often") \ 3139 \ 3140 develop(intx, InlineThrowMaxSize, 200, \ 3141 "Force inlining of throwing methods smaller than this") \ 3142 \ 3143 product(intx, AliasLevel, 3, \ 3144 "0 for no aliasing, 1 for oop/field/static/array split, " \ 3145 "2 for class split, 3 for unique instances") \ 3146 \ 3147 develop(bool, VerifyAliases, false, \ 3148 "perform extra checks on the results of alias analysis") \ 3149 \ 3150 develop(intx, ProfilerNodeSize, 1024, \ 3151 "Size in K to allocate for the Profile Nodes of each thread") \ 3152 \ 3153 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 3154 "Number of times to spin wait on a v8 atomic operation lock") \ 3155 \ 3156 product(intx, ReadSpinIterations, 100, \ 3157 "Number of read attempts before a yield (spin inner loop)") \ 3158 \ 3159 product_pd(intx, PreInflateSpin, \ 3160 "Number of times to spin wait before inflation") \ 3161 \ 3162 product(intx, PreBlockSpin, 10, \ 3163 "Number of times to spin in an inflated lock before going to " \ 3164 "an OS lock") \ 3165 \ 3166 /* gc parameters */ \ 3167 product(uintx, InitialHeapSize, 0, \ 3168 "Initial heap size (in bytes); zero means OldSize + NewSize") \ 3169 \ 3170 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 3171 "Maximum heap size (in bytes)") \ 3172 \ 3173 product(uintx, OldSize, ScaleForWordSize(4*M), \ 3174 "Initial tenured generation size (in bytes)") \ 3175 \ 3176 product(uintx, NewSize, ScaleForWordSize(1*M), \ 3177 "Initial new generation size (in bytes)") \ 3178 \ 3179 product(uintx, MaxNewSize, max_uintx, \ 3180 "Maximum new generation size (in bytes), max_uintx means set " \ 3181 "ergonomically") \ 3182 \ 3183 product(uintx, PretenureSizeThreshold, 0, \ 3184 "Maximum size in bytes of objects allocated in DefNew " \ 3185 "generation; zero means no maximum") \ 3186 \ 3187 product(uintx, TLABSize, 0, \ 3188 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3189 \ 3190 product(uintx, MinTLABSize, 2*K, \ 3191 "Minimum allowed TLAB size (in bytes)") \ 3192 \ 3193 product(uintx, TLABAllocationWeight, 35, \ 3194 "Allocation averaging weight") \ 3195 \ 3196 product(uintx, TLABWasteTargetPercent, 1, \ 3197 "Percentage of Eden that can be wasted") \ 3198 \ 3199 product(uintx, TLABRefillWasteFraction, 64, \ 3200 "Max TLAB waste at a refill (internal fragmentation)") \ 3201 \ 3202 product(uintx, TLABWasteIncrement, 4, \ 3203 "Increment allowed waste at slow allocation") \ 3204 \ 3205 product(intx, SurvivorRatio, 8, \ 3206 "Ratio of eden/survivor space size") \ 3207 \ 3208 product(intx, NewRatio, 2, \ 3209 "Ratio of new/old generation sizes") \ 3210 \ 3211 product_pd(uintx, NewSizeThreadIncrease, \ 3212 "Additional size added to desired new generation size per " \ 3213 "non-daemon thread (in bytes)") \ 3214 \ 3215 product_pd(uintx, PermSize, \ 3216 "Initial size of permanent generation (in bytes)") \ 3217 \ 3218 product_pd(uintx, MaxPermSize, \ 3219 "Maximum size of permanent generation (in bytes)") \ 3220 \ 3221 product(uintx, MinHeapFreeRatio, 40, \ 3222 "Min percentage of heap free after GC to avoid expansion") \ 3223 \ 3224 product(uintx, MaxHeapFreeRatio, 70, \ 3225 "Max percentage of heap free after GC to avoid shrinking") \ 3226 \ 3227 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3228 "Number of milliseconds per MB of free space in the heap") \ 3229 \ 3230 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3231 "Min change in heap space due to GC (in bytes)") \ 3232 \ 3233 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 3234 "Min expansion of permanent heap (in bytes)") \ 3235 \ 3236 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 3237 "Max expansion of permanent heap without full GC (in bytes)") \ 3238 \ 3239 product(intx, QueuedAllocationWarningCount, 0, \ 3240 "Number of times an allocation that queues behind a GC " \ 3241 "will retry before printing a warning") \ 3242 \ 3243 diagnostic(uintx, VerifyGCStartAt, 0, \ 3244 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3245 \ 3246 diagnostic(intx, VerifyGCLevel, 0, \ 3247 "Generation level at which to start +VerifyBefore/AfterGC") \ 3248 \ 3249 develop(uintx, ExitAfterGCNum, 0, \ 3250 "If non-zero, exit after this GC.") \ 3251 \ 3252 product(intx, MaxTenuringThreshold, 15, \ 3253 "Maximum value for tenuring threshold") \ 3254 \ 3255 product(intx, InitialTenuringThreshold, 7, \ 3256 "Initial value for tenuring threshold") \ 3257 \ 3258 product(intx, TargetSurvivorRatio, 50, \ 3259 "Desired percentage of survivor space used after scavenge") \ 3260 \ 3261 product(uintx, MarkSweepDeadRatio, 5, \ 3262 "Percentage (0-100) of the old gen allowed as dead wood." \ 3263 "Serial mark sweep treats this as both the min and max value." \ 3264 "CMS uses this value only if it falls back to mark sweep." \ 3265 "Par compact uses a variable scale based on the density of the" \ 3266 "generation and treats this as the max value when the heap is" \ 3267 "either completely full or completely empty. Par compact also" \ 3268 "has a smaller default value; see arguments.cpp.") \ 3269 \ 3270 product(uintx, PermMarkSweepDeadRatio, 20, \ 3271 "Percentage (0-100) of the perm gen allowed as dead wood." \ 3272 "See MarkSweepDeadRatio for collector-specific comments.") \ 3273 \ 3274 product(intx, MarkSweepAlwaysCompactCount, 4, \ 3275 "How often should we fully compact the heap (ignoring the dead " \ 3276 "space parameters)") \ 3277 \ 3278 product(intx, PrintCMSStatistics, 0, \ 3279 "Statistics for CMS") \ 3280 \ 3281 product(bool, PrintCMSInitiationStatistics, false, \ 3282 "Statistics for initiating a CMS collection") \ 3283 \ 3284 product(intx, PrintFLSStatistics, 0, \ 3285 "Statistics for CMS' FreeListSpace") \ 3286 \ 3287 product(intx, PrintFLSCensus, 0, \ 3288 "Census for CMS' FreeListSpace") \ 3289 \ 3290 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3291 "Delay in ms between expansion and allocation") \ 3292 \ 3293 product(intx, DeferThrSuspendLoopCount, 4000, \ 3294 "(Unstable) Number of times to iterate in safepoint loop " \ 3295 " before blocking VM threads ") \ 3296 \ 3297 product(intx, DeferPollingPageLoopCount, -1, \ 3298 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3299 "before changing safepoint polling page to RO ") \ 3300 \ 3301 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3302 \ 3303 product(bool, PSChunkLargeArrays, true, \ 3304 "true: process large arrays in chunks") \ 3305 \ 3306 product(uintx, GCDrainStackTargetSize, 64, \ 3307 "how many entries we'll try to leave on the stack during " \ 3308 "parallel GC") \ 3309 \ 3310 /* stack parameters */ \ 3311 product_pd(intx, StackYellowPages, \ 3312 "Number of yellow zone (recoverable overflows) pages") \ 3313 \ 3314 product_pd(intx, StackRedPages, \ 3315 "Number of red zone (unrecoverable overflows) pages") \ 3316 \ 3317 product_pd(intx, StackShadowPages, \ 3318 "Number of shadow zone (for overflow checking) pages" \ 3319 " this should exceed the depth of the VM and native call stack") \ 3320 \ 3321 product_pd(intx, ThreadStackSize, \ 3322 "Thread Stack Size (in Kbytes)") \ 3323 \ 3324 product_pd(intx, VMThreadStackSize, \ 3325 "Non-Java Thread Stack Size (in Kbytes)") \ 3326 \ 3327 product_pd(intx, CompilerThreadStackSize, \ 3328 "Compiler Thread Stack Size (in Kbytes)") \ 3329 \ 3330 develop_pd(uintx, JVMInvokeMethodSlack, \ 3331 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3332 \ 3333 product(uintx, ThreadSafetyMargin, 50*M, \ 3334 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3335 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3336 "disable this feature") \ 3337 \ 3338 /* code cache parameters */ \ 3339 develop(uintx, CodeCacheSegmentSize, 64, \ 3340 "Code cache segment size (in bytes) - smallest unit of " \ 3341 "allocation") \ 3342 \ 3343 develop_pd(intx, CodeEntryAlignment, \ 3344 "Code entry alignment for generated code (in bytes)") \ 3345 \ 3346 product_pd(intx, OptoLoopAlignment, \ 3347 "Align inner loops to zero relative to this modulus") \ 3348 \ 3349 product_pd(uintx, InitialCodeCacheSize, \ 3350 "Initial code cache size (in bytes)") \ 3351 \ 3352 product_pd(uintx, ReservedCodeCacheSize, \ 3353 "Reserved code cache size (in bytes) - maximum code cache size") \ 3354 \ 3355 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3356 "When less than X space left, we stop compiling.") \ 3357 \ 3358 product_pd(uintx, CodeCacheExpansionSize, \ 3359 "Code cache expansion size (in bytes)") \ 3360 \ 3361 develop_pd(uintx, CodeCacheMinBlockLength, \ 3362 "Minimum number of segments in a code cache block.") \ 3363 \ 3364 notproduct(bool, ExitOnFullCodeCache, false, \ 3365 "Exit the VM if we fill the code cache.") \ 3366 \ 3367 product(bool, UseCodeCacheFlushing, true, \ 3368 "Attempt to clean the code cache before shutting off compiler") \ 3369 \ 3370 product(intx, MinCodeCacheFlushingInterval, 30, \ 3371 "Min number of seconds between code cache cleaning sessions") \ 3372 \ 3373 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3374 "When less than X space left, start code cache cleaning") \ 3375 \ 3376 /* interpreter debugging */ \ 3377 develop(intx, BinarySwitchThreshold, 5, \ 3378 "Minimal number of lookupswitch entries for rewriting to binary " \ 3379 "switch") \ 3380 \ 3381 develop(intx, StopInterpreterAt, 0, \ 3382 "Stops interpreter execution at specified bytecode number") \ 3383 \ 3384 develop(intx, TraceBytecodesAt, 0, \ 3385 "Traces bytecodes starting with specified bytecode number") \ 3386 \ 3387 /* compiler interface */ \ 3388 develop(intx, CIStart, 0, \ 3389 "the id of the first compilation to permit") \ 3390 \ 3391 develop(intx, CIStop, -1, \ 3392 "the id of the last compilation to permit") \ 3393 \ 3394 develop(intx, CIStartOSR, 0, \ 3395 "the id of the first osr compilation to permit " \ 3396 "(CICountOSR must be on)") \ 3397 \ 3398 develop(intx, CIStopOSR, -1, \ 3399 "the id of the last osr compilation to permit " \ 3400 "(CICountOSR must be on)") \ 3401 \ 3402 develop(intx, CIBreakAtOSR, -1, \ 3403 "id of osr compilation to break at") \ 3404 \ 3405 develop(intx, CIBreakAt, -1, \ 3406 "id of compilation to break at") \ 3407 \ 3408 product(ccstrlist, CompileOnly, "", \ 3409 "List of methods (pkg/class.name) to restrict compilation to") \ 3410 \ 3411 product(ccstr, CompileCommandFile, NULL, \ 3412 "Read compiler commands from this file [.hotspot_compiler]") \ 3413 \ 3414 product(ccstrlist, CompileCommand, "", \ 3415 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3416 \ 3417 product(bool, CICompilerCountPerCPU, false, \ 3418 "1 compiler thread for log(N CPUs)") \ 3419 \ 3420 develop(intx, CIFireOOMAt, -1, \ 3421 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3422 "(non-negative value throws OOM after this many CI accesses " \ 3423 "in each compile)") \ 3424 \ 3425 develop(intx, CIFireOOMAtDelay, -1, \ 3426 "Wait for this many CI accesses to occur in all compiles before " \ 3427 "beginning to throw OutOfMemoryErrors in each compile") \ 3428 \ 3429 notproduct(bool, CIObjectFactoryVerify, false, \ 3430 "enable potentially expensive verification in ciObjectFactory") \ 3431 \ 3432 /* Priorities */ \ 3433 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3434 \ 3435 product(intx, ThreadPriorityPolicy, 0, \ 3436 "0 : Normal. "\ 3437 " VM chooses priorities that are appropriate for normal "\ 3438 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3439 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3440 " map to lower native priority values. On Windows applications"\ 3441 " are allowed to use higher native priorities. However, with "\ 3442 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3443 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3444 " interfere with system threads. On Linux thread priorities "\ 3445 " are ignored because the OS does not support static priority "\ 3446 " in SCHED_OTHER scheduling class which is the only choice for"\ 3447 " non-root, non-realtime applications. "\ 3448 "1 : Aggressive. "\ 3449 " Java thread priorities map over to the entire range of "\ 3450 " native thread priorities. Higher Java thread priorities map "\ 3451 " to higher native thread priorities. This policy should be "\ 3452 " used with care, as sometimes it can cause performance "\ 3453 " degradation in the application and/or the entire system. On "\ 3454 " Linux this policy requires root privilege.") \ 3455 \ 3456 product(bool, ThreadPriorityVerbose, false, \ 3457 "print priority changes") \ 3458 \ 3459 product(intx, DefaultThreadPriority, -1, \ 3460 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ 3461 \ 3462 product(intx, CompilerThreadPriority, -1, \ 3463 "what priority should compiler threads run at (-1 means no change)") \ 3464 \ 3465 product(intx, VMThreadPriority, -1, \ 3466 "what priority should VM threads run at (-1 means no change)") \ 3467 \ 3468 product(bool, CompilerThreadHintNoPreempt, true, \ 3469 "(Solaris only) Give compiler threads an extra quanta") \ 3470 \ 3471 product(bool, VMThreadHintNoPreempt, false, \ 3472 "(Solaris only) Give VM thread an extra quanta") \ 3473 \ 3474 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3475 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3476 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3477 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3478 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3479 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3480 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3481 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3482 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3483 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3484 \ 3485 /* compiler debugging */ \ 3486 notproduct(intx, CompileTheWorldStartAt, 1, \ 3487 "First class to consider when using +CompileTheWorld") \ 3488 \ 3489 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3490 "Last class to consider when using +CompileTheWorld") \ 3491 \ 3492 develop(intx, NewCodeParameter, 0, \ 3493 "Testing Only: Create a dedicated integer parameter before " \ 3494 "putback") \ 3495 \ 3496 /* new oopmap storage allocation */ \ 3497 develop(intx, MinOopMapAllocation, 8, \ 3498 "Minimum number of OopMap entries in an OopMapSet") \ 3499 \ 3500 /* Background Compilation */ \ 3501 develop(intx, LongCompileThreshold, 50, \ 3502 "Used with +TraceLongCompiles") \ 3503 \ 3504 product(intx, StarvationMonitorInterval, 200, \ 3505 "Pause between each check in ms") \ 3506 \ 3507 /* recompilation */ \ 3508 product_pd(intx, CompileThreshold, \ 3509 "number of interpreted method invocations before (re-)compiling") \ 3510 \ 3511 product_pd(intx, BackEdgeThreshold, \ 3512 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3513 \ 3514 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3515 "Interpreter (tier 0) invocation notification frequency.") \ 3516 \ 3517 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3518 "C1 without MDO (tier 2) invocation notification frequency.") \ 3519 \ 3520 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3521 "C1 with MDO profiling (tier 3) invocation notification " \ 3522 "frequency.") \ 3523 \ 3524 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3525 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3526 \ 3527 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3528 "Interpreter (tier 0) invocation notification frequency.") \ 3529 \ 3530 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3531 "C1 without MDO (tier 2) invocation notification frequency.") \ 3532 \ 3533 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3534 "C1 with MDO profiling (tier 3) invocation notification " \ 3535 "frequency.") \ 3536 \ 3537 product(intx, Tier2CompileThreshold, 0, \ 3538 "threshold at which tier 2 compilation is invoked") \ 3539 \ 3540 product(intx, Tier2BackEdgeThreshold, 0, \ 3541 "Back edge threshold at which tier 2 compilation is invoked") \ 3542 \ 3543 product(intx, Tier3InvocationThreshold, 200, \ 3544 "Compile if number of method invocations crosses this " \ 3545 "threshold") \ 3546 \ 3547 product(intx, Tier3MinInvocationThreshold, 100, \ 3548 "Minimum invocation to compile at tier 3") \ 3549 \ 3550 product(intx, Tier3CompileThreshold, 2000, \ 3551 "Threshold at which tier 3 compilation is invoked (invocation " \ 3552 "minimum must be satisfied.") \ 3553 \ 3554 product(intx, Tier3BackEdgeThreshold, 7000, \ 3555 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3556 \ 3557 product(intx, Tier4InvocationThreshold, 5000, \ 3558 "Compile if number of method invocations crosses this " \ 3559 "threshold") \ 3560 \ 3561 product(intx, Tier4MinInvocationThreshold, 600, \ 3562 "Minimum invocation to compile at tier 4") \ 3563 \ 3564 product(intx, Tier4CompileThreshold, 15000, \ 3565 "Threshold at which tier 4 compilation is invoked (invocation " \ 3566 "minimum must be satisfied.") \ 3567 \ 3568 product(intx, Tier4BackEdgeThreshold, 40000, \ 3569 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3570 \ 3571 product(intx, Tier3DelayOn, 5, \ 3572 "If C2 queue size grows over this amount per compiler thread " \ 3573 "stop compiling at tier 3 and start compiling at tier 2") \ 3574 \ 3575 product(intx, Tier3DelayOff, 2, \ 3576 "If C2 queue size is less than this amount per compiler thread " \ 3577 "allow methods compiled at tier 2 transition to tier 3") \ 3578 \ 3579 product(intx, Tier3LoadFeedback, 5, \ 3580 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3581 "reaches this amount per compiler thread") \ 3582 \ 3583 product(intx, Tier4LoadFeedback, 3, \ 3584 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3585 "reaches this amount per compiler thread") \ 3586 \ 3587 product(intx, TieredCompileTaskTimeout, 50, \ 3588 "Kill compile task if method was not used within " \ 3589 "given timeout in milliseconds") \ 3590 \ 3591 product(intx, TieredStopAtLevel, 4, \ 3592 "Stop at given compilation level") \ 3593 \ 3594 product(intx, Tier0ProfilingStartPercentage, 200, \ 3595 "Start profiling in interpreter if the counters exceed tier 3" \ 3596 "thresholds by the specified percentage") \ 3597 \ 3598 product(intx, TieredRateUpdateMinTime, 1, \ 3599 "Minimum rate sampling interval (in milliseconds)") \ 3600 \ 3601 product(intx, TieredRateUpdateMaxTime, 25, \ 3602 "Maximum rate sampling interval (in milliseconds)") \ 3603 \ 3604 product_pd(bool, TieredCompilation, \ 3605 "Enable tiered compilation") \ 3606 \ 3607 product(bool, PrintTieredEvents, false, \ 3608 "Print tiered events notifications") \ 3609 \ 3610 product(bool, StressTieredRuntime, false, \ 3611 "Alternate client and server compiler on compile requests") \ 3612 \ 3613 product_pd(intx, OnStackReplacePercentage, \ 3614 "NON_TIERED number of method invocations/branches (expressed as %"\ 3615 "of CompileThreshold) before (re-)compiling OSR code") \ 3616 \ 3617 product(intx, InterpreterProfilePercentage, 33, \ 3618 "NON_TIERED number of method invocations/branches (expressed as %"\ 3619 "of CompileThreshold) before profiling in the interpreter") \ 3620 \ 3621 develop(intx, MaxRecompilationSearchLength, 10, \ 3622 "max. # frames to inspect searching for recompilee") \ 3623 \ 3624 develop(intx, MaxInterpretedSearchLength, 3, \ 3625 "max. # interp. frames to skip when searching for recompilee") \ 3626 \ 3627 develop(intx, DesiredMethodLimit, 8000, \ 3628 "desired max. method size (in bytecodes) after inlining") \ 3629 \ 3630 develop(intx, HugeMethodLimit, 8000, \ 3631 "don't compile methods larger than this if " \ 3632 "+DontCompileHugeMethods") \ 3633 \ 3634 /* New JDK 1.4 reflection implementation */ \ 3635 \ 3636 develop(bool, UseNewReflection, true, \ 3637 "Temporary flag for transition to reflection based on dynamic " \ 3638 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3639 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3640 "changes were needed") \ 3641 \ 3642 develop(bool, VerifyReflectionBytecodes, false, \ 3643 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3644 "in situations like that described in 4486457 or for " \ 3645 "constructors generated for serialization, so can not be enabled "\ 3646 "in product.") \ 3647 \ 3648 product(bool, ReflectionWrapResolutionErrors, true, \ 3649 "Temporary flag for transition to AbstractMethodError wrapped " \ 3650 "in InvocationTargetException. See 6531596") \ 3651 \ 3652 \ 3653 develop(intx, FastSuperclassLimit, 8, \ 3654 "Depth of hardwired instanceof accelerator array") \ 3655 \ 3656 /* Properties for Java libraries */ \ 3657 \ 3658 product(intx, MaxDirectMemorySize, -1, \ 3659 "Maximum total size of NIO direct-buffer allocations") \ 3660 \ 3661 /* temporary developer defined flags */ \ 3662 \ 3663 diagnostic(bool, UseNewCode, false, \ 3664 "Testing Only: Use the new version while testing") \ 3665 \ 3666 diagnostic(bool, UseNewCode2, false, \ 3667 "Testing Only: Use the new version while testing") \ 3668 \ 3669 diagnostic(bool, UseNewCode3, false, \ 3670 "Testing Only: Use the new version while testing") \ 3671 \ 3672 /* flags for performance data collection */ \ 3673 \ 3674 product(bool, UsePerfData, falseInEmbedded, \ 3675 "Flag to disable jvmstat instrumentation for performance testing" \ 3676 "and problem isolation purposes.") \ 3677 \ 3678 product(bool, PerfDataSaveToFile, false, \ 3679 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3680 \ 3681 product(ccstr, PerfDataSaveFile, NULL, \ 3682 "Save PerfData memory to the specified absolute pathname," \ 3683 "%p in the file name if present will be replaced by pid") \ 3684 \ 3685 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3686 "Data sampling interval in milliseconds") \ 3687 \ 3688 develop(bool, PerfTraceDataCreation, false, \ 3689 "Trace creation of Performance Data Entries") \ 3690 \ 3691 develop(bool, PerfTraceMemOps, false, \ 3692 "Trace PerfMemory create/attach/detach calls") \ 3693 \ 3694 product(bool, PerfDisableSharedMem, false, \ 3695 "Store performance data in standard memory") \ 3696 \ 3697 product(intx, PerfDataMemorySize, 32*K, \ 3698 "Size of performance data memory region. Will be rounded " \ 3699 "up to a multiple of the native os page size.") \ 3700 \ 3701 product(intx, PerfMaxStringConstLength, 1024, \ 3702 "Maximum PerfStringConstant string length before truncation") \ 3703 \ 3704 product(bool, PerfAllowAtExitRegistration, false, \ 3705 "Allow registration of atexit() methods") \ 3706 \ 3707 product(bool, PerfBypassFileSystemCheck, false, \ 3708 "Bypass Win32 file system criteria checks (Windows Only)") \ 3709 \ 3710 product(intx, UnguardOnExecutionViolation, 0, \ 3711 "Unguard page and retry on no-execute fault (Win32 only)" \ 3712 "0=off, 1=conservative, 2=aggressive") \ 3713 \ 3714 /* Serviceability Support */ \ 3715 \ 3716 product(bool, ManagementServer, false, \ 3717 "Create JMX Management Server") \ 3718 \ 3719 product(bool, DisableAttachMechanism, false, \ 3720 "Disable mechanism that allows tools to attach to this VM") \ 3721 \ 3722 product(bool, StartAttachListener, false, \ 3723 "Always start Attach Listener at VM startup") \ 3724 \ 3725 manageable(bool, PrintConcurrentLocks, false, \ 3726 "Print java.util.concurrent locks in thread dump") \ 3727 \ 3728 product(bool, TransmitErrorReport, false, \ 3729 "Enable error report transmission on erroneous termination") \ 3730 \ 3731 product(ccstr, ErrorReportServer, NULL, \ 3732 "Override built-in error report server address") \ 3733 \ 3734 /* Shared spaces */ \ 3735 \ 3736 product(bool, UseSharedSpaces, true, \ 3737 "Use shared spaces in the permanent generation") \ 3738 \ 3739 product(bool, RequireSharedSpaces, false, \ 3740 "Require shared spaces in the permanent generation") \ 3741 \ 3742 product(bool, DumpSharedSpaces, false, \ 3743 "Special mode: JVM reads a class list, loads classes, builds " \ 3744 "shared spaces, and dumps the shared spaces to a file to be " \ 3745 "used in future JVM runs.") \ 3746 \ 3747 product(bool, PrintSharedSpaces, false, \ 3748 "Print usage of shared spaces") \ 3749 \ 3750 product(uintx, SharedDummyBlockSize, 512*M, \ 3751 "Size of dummy block used to shift heap addresses (in bytes)") \ 3752 \ 3753 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(13*M), \ 3754 "Size of read-write space in permanent generation (in bytes)") \ 3755 \ 3756 product(uintx, SharedReadOnlySize, 10*M, \ 3757 "Size of read-only space in permanent generation (in bytes)") \ 3758 \ 3759 product(uintx, SharedMiscDataSize, NOT_LP64(4*M) LP64_ONLY(5*M), \ 3760 "Size of the shared data area adjacent to the heap (in bytes)") \ 3761 \ 3762 product(uintx, SharedMiscCodeSize, 4*M, \ 3763 "Size of the shared code area adjacent to the heap (in bytes)") \ 3764 \ 3765 diagnostic(bool, SharedOptimizeColdStart, true, \ 3766 "At dump time, order shared objects to achieve better " \ 3767 "cold startup time.") \ 3768 \ 3769 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3770 "Reordering policy for SharedOptimizeColdStart " \ 3771 "0=favor classload-time locality, 1=balanced, " \ 3772 "2=favor runtime locality") \ 3773 \ 3774 diagnostic(bool, SharedSkipVerify, false, \ 3775 "Skip assert() and verify() which page-in unwanted shared " \ 3776 "objects. ") \ 3777 \ 3778 diagnostic(bool, EnableInvokeDynamic, true, \ 3779 "support JSR 292 (method handles, invokedynamic, " \ 3780 "anonymous classes") \ 3781 \ 3782 product(bool, AnonymousClasses, false, \ 3783 "support sun.misc.Unsafe.defineAnonymousClass (deprecated)") \ 3784 \ 3785 experimental(bool, EnableMethodHandles, false, \ 3786 "support method handles (deprecated)") \ 3787 \ 3788 diagnostic(intx, MethodHandlePushLimit, 3, \ 3789 "number of additional stack slots a method handle may push") \ 3790 \ 3791 diagnostic(bool, PrintMethodHandleStubs, false, \ 3792 "Print generated stub code for method handles") \ 3793 \ 3794 develop(bool, TraceMethodHandles, false, \ 3795 "trace internal method handle operations") \ 3796 \ 3797 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3798 "perform extra checks when constructing method handles") \ 3799 \ 3800 diagnostic(bool, OptimizeMethodHandles, true, \ 3801 "when constructing method handles, try to improve them") \ 3802 \ 3803 develop(bool, StressMethodHandleWalk, false, \ 3804 "Process all method handles with MethodHandleWalk") \ 3805 \ 3806 diagnostic(bool, UseRicochetFrames, true, \ 3807 "use ricochet stack frames for method handle combination, " \ 3808 "if the platform supports them") \ 3809 \ 3810 experimental(bool, TrustFinalNonStaticFields, false, \ 3811 "trust final non-static declarations for constant folding") \ 3812 \ 3813 experimental(bool, AllowInvokeGeneric, false, \ 3814 "accept MethodHandle.invoke and MethodHandle.invokeGeneric " \ 3815 "as equivalent methods") \ 3816 \ 3817 develop(bool, TraceInvokeDynamic, false, \ 3818 "trace internal invoke dynamic operations") \ 3819 \ 3820 diagnostic(bool, PauseAtStartup, false, \ 3821 "Causes the VM to pause at startup time and wait for the pause " \ 3822 "file to be removed (default: ./vm.paused.<pid>)") \ 3823 \ 3824 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3825 "The file to create and for whose removal to await when pausing " \ 3826 "at startup. (default: ./vm.paused.<pid>)") \ 3827 \ 3828 diagnostic(bool, PauseAtExit, false, \ 3829 "Pause and wait for keypress on exit if a debugger is attached") \ 3830 \ 3831 product(bool, ExtendedDTraceProbes, false, \ 3832 "Enable performance-impacting dtrace probes") \ 3833 \ 3834 product(bool, DTraceMethodProbes, false, \ 3835 "Enable dtrace probes for method-entry and method-exit") \ 3836 \ 3837 product(bool, DTraceAllocProbes, false, \ 3838 "Enable dtrace probes for object allocation") \ 3839 \ 3840 product(bool, DTraceMonitorProbes, false, \ 3841 "Enable dtrace probes for monitor events") \ 3842 \ 3843 product(bool, RelaxAccessControlCheck, false, \ 3844 "Relax the access control checks in the verifier") \ 3845 \ 3846 diagnostic(bool, PrintDTraceDOF, false, \ 3847 "Print the DTrace DOF passed to the system for JSDT probes") \ 3848 \ 3849 product(uintx, StringTableSize, 1009, \ 3850 "Number of buckets in the interned String table") \ 3851 \ 3852 product(bool, UseVMInterruptibleIO, false, \ 3853 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3854 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3855 " of this flag is true for JDK 6 and earliers") 3856 3857/* 3858 * Macros for factoring of globals 3859 */ 3860 3861// Interface macros 3862#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3863#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3864#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3865#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3866#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3867#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3868#ifdef PRODUCT 3869#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3870#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3871#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3872#else 3873#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3874#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3875#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3876#endif 3877// Special LP64 flags, product only needed for now. 3878#ifdef _LP64 3879#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3880#else 3881#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3882#endif // _LP64 3883 3884// Implementation macros 3885#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3886#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3887#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3888#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3889#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3890#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3891#ifdef PRODUCT 3892#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3893#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3894#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3895#else 3896#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3897#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3898#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3899#endif 3900#ifdef _LP64 3901#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3902#else 3903#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3904#endif // _LP64 3905 3906RUNTIME_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) 3907 3908RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3909 3910#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3911