globals.hpp revision 3411:8b0a4867acf0
137Srgrimes/* 237Srgrimes * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 337Srgrimes * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4705Swollman * 5705Swollman * This code is free software; you can redistribute it and/or modify it 6705Swollman * under the terms of the GNU General Public License version 2 only, as 739139Sobrien * published by the Free Software Foundation. 846414Sghelmer * 980266Sdougb * This code is distributed in the hope that it will be useful, but WITHOUT 1080945Sdougb * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1180266Sdougb * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1239139Sobrien * version 2 for more details (a copy is included in the LICENSE file that 1339139Sobrien * accompanied this code). 1439139Sobrien * 1539139Sobrien * You should have received a copy of the GNU General Public License version 167685Sache * 2 along with this work; if not, write to the Free Software Foundation, 177685Sache * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1837Srgrimes * 1950472Speter * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20705Swollman * or visit www.oracle.com if you need additional information or have any 21705Swollman * questions. 227685Sache * 237685Sache */ 2422009Sphk 257685Sache#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 267685Sache#define SHARE_VM_RUNTIME_GLOBALS_HPP 2722009Sphk 287685Sache#include "utilities/debug.hpp" 297685Sache 307685Sache// use this for flags that are true per default in the tiered build 317685Sache// but false in non-tiered builds, and vice versa 3222009Sphk#ifdef TIERED 337685Sache#define trueInTiered true 347685Sache#define falseInTiered false 3522009Sphk#else 36215249Stuexen#define trueInTiered false 377685Sache#define falseInTiered true 387685Sache#endif 39215249Stuexen 407685Sache#ifdef TARGET_ARCH_x86 417685Sache# include "globals_x86.hpp" 427685Sache#endif 437685Sache#ifdef TARGET_ARCH_sparc 44215249Stuexen# include "globals_sparc.hpp" 457685Sache#endif 467685Sache#ifdef TARGET_ARCH_zero 477685Sache# include "globals_zero.hpp" 487685Sache#endif 497685Sache#ifdef TARGET_ARCH_arm 507685Sache# include "globals_arm.hpp" 51215249Stuexen#endif 527685Sache#ifdef TARGET_ARCH_ppc 537685Sache# include "globals_ppc.hpp" 54215249Stuexen#endif 557685Sache#ifdef TARGET_OS_FAMILY_linux 567685Sache# include "globals_linux.hpp" 57215249Stuexen#endif 587685Sache#ifdef TARGET_OS_FAMILY_solaris 597685Sache# include "globals_solaris.hpp" 60215249Stuexen#endif 61131994Scperciva#ifdef TARGET_OS_FAMILY_windows 62131994Scperciva# include "globals_windows.hpp" 637685Sache#endif 647685Sache#ifdef TARGET_OS_FAMILY_bsd 657685Sache# include "globals_bsd.hpp" 667685Sache#endif 677685Sache#ifdef TARGET_OS_ARCH_linux_x86 687685Sache# include "globals_linux_x86.hpp" 697685Sache#endif 707685Sache#ifdef TARGET_OS_ARCH_linux_sparc 717685Sache# include "globals_linux_sparc.hpp" 727685Sache#endif 737685Sache#ifdef TARGET_OS_ARCH_linux_zero 747685Sache# include "globals_linux_zero.hpp" 757685Sache#endif 767685Sache#ifdef TARGET_OS_ARCH_solaris_x86 777685Sache# include "globals_solaris_x86.hpp" 787685Sache#endif 797685Sache#ifdef TARGET_OS_ARCH_solaris_sparc 807685Sache# include "globals_solaris_sparc.hpp" 817685Sache#endif 827685Sache#ifdef TARGET_OS_ARCH_windows_x86 837685Sache# include "globals_windows_x86.hpp" 847685Sache#endif 857685Sache#ifdef TARGET_OS_ARCH_linux_arm 867685Sache# include "globals_linux_arm.hpp" 877685Sache#endif 887685Sache#ifdef TARGET_OS_ARCH_linux_ppc 897685Sache# include "globals_linux_ppc.hpp" 907685Sache#endif 917685Sache#ifdef TARGET_OS_ARCH_bsd_x86 927685Sache# include "globals_bsd_x86.hpp" 937685Sache#endif 947685Sache#ifdef TARGET_OS_ARCH_bsd_zero 957685Sache# include "globals_bsd_zero.hpp" 967685Sache#endif 977685Sache#ifdef COMPILER1 987685Sache#ifdef TARGET_ARCH_x86 997685Sache# include "c1_globals_x86.hpp" 1007685Sache#endif 101131994Scperciva#ifdef TARGET_ARCH_sparc 102131994Scperciva# include "c1_globals_sparc.hpp" 1037685Sache#endif 1047685Sache#ifdef TARGET_ARCH_arm 1057685Sache# include "c1_globals_arm.hpp" 1067685Sache#endif 1077685Sache#ifdef TARGET_ARCH_ppc 1087685Sache# include "c1_globals_ppc.hpp" 1097685Sache#endif 1107685Sache#ifdef TARGET_OS_FAMILY_linux 1117685Sache# include "c1_globals_linux.hpp" 1127685Sache#endif 1137685Sache#ifdef TARGET_OS_FAMILY_solaris 1147685Sache# include "c1_globals_solaris.hpp" 1157685Sache#endif 1167685Sache#ifdef TARGET_OS_FAMILY_windows 117169784Sgrog# include "c1_globals_windows.hpp" 118169784Sgrog#endif 1197685Sache#ifdef TARGET_OS_FAMILY_bsd 1207685Sache# include "c1_globals_bsd.hpp" 1217685Sache#endif 1227685Sache#endif 1237685Sache#ifdef COMPILER2 1247685Sache#ifdef TARGET_ARCH_x86 1257685Sache# include "c2_globals_x86.hpp" 1267685Sache#endif 1277685Sache#ifdef TARGET_ARCH_sparc 1287685Sache# include "c2_globals_sparc.hpp" 1297685Sache#endif 1307685Sache#ifdef TARGET_ARCH_arm 1317685Sache# include "c2_globals_arm.hpp" 1327685Sache#endif 1337685Sache#ifdef TARGET_OS_FAMILY_linux 1347685Sache# include "c2_globals_linux.hpp" 13513583Spst#endif 13613583Spst#ifdef TARGET_OS_FAMILY_solaris 13713583Spst# include "c2_globals_solaris.hpp" 13813583Spst#endif 1397685Sache#ifdef TARGET_OS_FAMILY_windows 1407685Sache# include "c2_globals_windows.hpp" 1417685Sache#endif 1427685Sache#ifdef TARGET_OS_FAMILY_bsd 1437685Sache# include "c2_globals_bsd.hpp" 1447685Sache#endif 1457685Sache#endif 1467685Sache#ifdef SHARK 1477685Sache#ifdef TARGET_ARCH_zero 1487685Sache# include "shark_globals_zero.hpp" 1497685Sache#endif 1507685Sache#endif 1517685Sache 1527685Sache#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 1537685Sachedefine_pd_global(bool, BackgroundCompilation, false); 1547685Sachedefine_pd_global(bool, UseTLAB, false); 1557685Sachedefine_pd_global(bool, CICompileOSR, false); 1567685Sachedefine_pd_global(bool, UseTypeProfile, false); 1577685Sachedefine_pd_global(bool, UseOnStackReplacement, false); 1587685Sachedefine_pd_global(bool, InlineIntrinsics, false); 1597685Sachedefine_pd_global(bool, PreferInterpreterNativeStubs, true); 1607685Sachedefine_pd_global(bool, ProfileInterpreter, false); 161215249Stuexendefine_pd_global(bool, ProfileTraps, false); 162131994Scpercivadefine_pd_global(bool, TieredCompilation, false); 163131994Scperciva 1647685Sachedefine_pd_global(intx, CompileThreshold, 0); 1657685Sachedefine_pd_global(intx, BackEdgeThreshold, 0); 1667685Sache 1677685Sachedefine_pd_global(intx, OnStackReplacePercentage, 0); 1687685Sachedefine_pd_global(bool, ResizeTLAB, false); 1697685Sachedefine_pd_global(intx, FreqInlineSize, 0); 1707685Sachedefine_pd_global(intx, InlineSmallCode, 0); 1717685Sachedefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 1727685Sachedefine_pd_global(intx, InlineClassNatives, true); 1737685Sachedefine_pd_global(intx, InlineUnsafeOps, true); 1747685Sachedefine_pd_global(intx, InitialCodeCacheSize, 160*K); 1757685Sachedefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 1767685Sachedefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 1777685Sachedefine_pd_global(intx, CodeCacheMinBlockLength, 1); 178131994Scpercivadefine_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); 179131994Scpercivadefine_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); 1807685Sachedefine_pd_global(bool, NeverActAsServerClassMachine, true); 1817685Sachedefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 1827685Sache#define CI_COMPILER_COUNT 0 1837685Sache#else 1847685Sache 1857685Sache#ifdef COMPILER2 1867685Sache#define CI_COMPILER_COUNT 2 1877685Sache#else 1887685Sache#define CI_COMPILER_COUNT 1 1897685Sache#endif // COMPILER2 1907685Sache 1917685Sache#endif // no compilers 1927685Sache 1937685Sache 1947685Sache// string type aliases used only in this file 1957685Sachetypedef const char* ccstr; 1967685Sachetypedef const char* ccstrlist; // represents string arguments which accumulate 1977685Sache 19880597Sdougbenum FlagValueOrigin { 19980597Sdougb DEFAULT = 0, 2007685Sache COMMAND_LINE = 1, 2017685Sache ENVIRON_VAR = 2, 2027685Sache CONFIG_FILE = 3, 2037685Sache MANAGEMENT = 4, 2047685Sache ERGONOMIC = 5, 2057685Sache ATTACH_ON_DEMAND = 6, 2067685Sache INTERNAL = 99 2077685Sache}; 2087685Sache 2097685Sachestruct Flag { 2107685Sache const char *type; 21139139Sobrien const char *name; 21239139Sobrien void* addr; 213131994Scperciva 2147685Sache NOT_PRODUCT(const char *doc;) 2157685Sache 2167685Sache const char *kind; 2177685Sache FlagValueOrigin origin; 2187685Sache 2197685Sache // points to all Flags static array 2207685Sache static Flag *flags; 2217685Sache 2227685Sache // number of flags 2237685Sache static size_t numFlags; 2247685Sache 2257685Sache static Flag* find_flag(char* name, size_t length, bool allow_locked = false); 2267685Sache 2277685Sache bool is_bool() const { return strcmp(type, "bool") == 0; } 2287685Sache bool get_bool() const { return *((bool*) addr); } 2297685Sache void set_bool(bool value) { *((bool*) addr) = value; } 2307685Sache 2317685Sache bool is_intx() const { return strcmp(type, "intx") == 0; } 2327685Sache intx get_intx() const { return *((intx*) addr); } 2337685Sache void set_intx(intx value) { *((intx*) addr) = value; } 2347685Sache 2357685Sache bool is_uintx() const { return strcmp(type, "uintx") == 0; } 2367685Sache uintx get_uintx() const { return *((uintx*) addr); } 2377685Sache void set_uintx(uintx value) { *((uintx*) addr) = value; } 2387685Sache 2397685Sache bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 2407685Sache uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 2417685Sache void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 2427685Sache 2437685Sache bool is_double() const { return strcmp(type, "double") == 0; } 2447685Sache double get_double() const { return *((double*) addr); } 2457685Sache void set_double(double value) { *((double*) addr) = value; } 2467685Sache 2477685Sache bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 2487685Sache bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 2497685Sache ccstr get_ccstr() const { return *((ccstr*) addr); } 2507685Sache void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 2517685Sache 2527685Sache bool is_unlocker() const; 2537685Sache bool is_unlocked() const; 2547685Sache bool is_writeable() const; 2557685Sache bool is_external() const; 2567685Sache 2577685Sache bool is_unlocker_ext() const; 2587685Sache bool is_unlocked_ext() const; 2597685Sache bool is_writeable_ext() const; 2607685Sache bool is_external_ext() const; 2617685Sache 2627685Sache void get_locked_message(char*, int) const; 2637685Sache void get_locked_message_ext(char*, int) const; 2647685Sache 2657685Sache void print_on(outputStream* st, bool withComments = false ); 2667685Sache void print_as_flag(outputStream* st); 2677685Sache}; 2687685Sache 26939139Sobrien// debug flags control various aspects of the VM and are global accessible 27039139Sobrien 27191141Scjc// use FlagSetting to temporarily change some debug flag 27291141Scjc// e.g. FlagSetting fs(DebugThisAndThat, true); 27391141Scjc// restored to previous value upon leaving scope 27491141Scjcclass FlagSetting { 2757685Sache bool val; 2767685Sache bool* flag; 2777685Sache public: 2787685Sache FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 2797685Sache ~FlagSetting() { *flag = val; } 2807685Sache}; 2817685Sache 2827685Sache 28391141Scjcclass CounterSetting { 28491141Scjc intx* counter; 285131994Scperciva public: 286131994Scperciva CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 2877685Sache ~CounterSetting() { (*counter)--; } 2887685Sache}; 28939139Sobrien 29039139Sobrien 29139139Sobrienclass IntFlagSetting { 29239139Sobrien intx val; 29391141Scjc intx* flag; 29491141Scjc public: 2957685Sache IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 2967685Sache ~IntFlagSetting() { *flag = val; } 2977685Sache}; 2987685Sache 29991141Scjc 30091141Scjcclass DoubleFlagSetting { 30191141Scjc double val; 30291141Scjc double* flag; 3037685Sache public: 3047685Sache DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 3057685Sache ~DoubleFlagSetting() { *flag = val; } 3067685Sache}; 30791141Scjc 30891141Scjc 3097685Sacheclass CommandLineFlags { 3107685Sache public: 3117685Sache static bool boolAt(char* name, size_t len, bool* value); 3127685Sache static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 3137685Sache static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 3147685Sache static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 31591141Scjc 31691141Scjc static bool intxAt(char* name, size_t len, intx* value); 3177685Sache static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 3187685Sache static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 31991141Scjc static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 32091141Scjc 3217685Sache static bool uintxAt(char* name, size_t len, uintx* value); 3227685Sache static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 3237685Sache static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 3247685Sache static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 3257685Sache 3267685Sache static bool uint64_tAt(char* name, size_t len, uint64_t* value); 3277685Sache static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 3287685Sache static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 32991141Scjc static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 33091141Scjc 33191141Scjc static bool doubleAt(char* name, size_t len, double* value); 33291141Scjc static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 33391141Scjc static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 33491141Scjc static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 33591141Scjc 33691141Scjc static bool ccstrAt(char* name, size_t len, ccstr* value); 3377685Sache static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 3387685Sache static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 3397685Sache static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 3407685Sache 3417685Sache // Returns false if name is not a command line flag. 3427685Sache static bool wasSetOnCmdline(const char* name, bool* value); 34391141Scjc static void printSetFlags(outputStream* out); 34491141Scjc 3457685Sache static void printFlags(outputStream* out, bool withComments); 3467685Sache 34791141Scjc static void verify() PRODUCT_RETURN; 34891141Scjc}; 3497685Sache 3507685Sache// use this for flags that are true by default in the debug version but 3517685Sache// false in the optimized version, and vice versa 3527685Sache#ifdef ASSERT 3537685Sache#define trueInDebug true 3547685Sache#define falseInDebug false 3557685Sache#else 3567685Sache#define trueInDebug false 35791141Scjc#define falseInDebug true 35891141Scjc#endif 35939139Sobrien 3607685Sache// use this for flags that are true per default in the product build 361215249Stuexen// but false in development builds, and vice versa 36291141Scjc#ifdef PRODUCT 36391141Scjc#define trueInProduct true 36491141Scjc#define falseInProduct false 36591141Scjc#else 3667685Sache#define trueInProduct false 3677685Sache#define falseInProduct true 36891141Scjc#endif 36991141Scjc 3707685Sache#ifdef JAVASE_EMBEDDED 3717685Sache#define falseInEmbedded false 3727685Sache#else 3737685Sache#define falseInEmbedded true 3747685Sache#endif 3757685Sache 37691141Scjc// develop flags are settable / visible only during development and are constant in the PRODUCT version 37791141Scjc// product flags are always settable / visible 3787685Sache// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 3797685Sache 38091141Scjc// A flag must be declared with one of the following types: 38191141Scjc// bool, intx, uintx, ccstr. 38291141Scjc// The type "ccstr" is an alias for "const char*" and is used 38391141Scjc// only in this file, because the macrology requires single-token type names. 3847685Sache 385131994Scperciva// Note: Diagnostic options not meant for VM tuning or for product modes. 38691141Scjc// They are to be used for VM quality assurance or field diagnosis 38791141Scjc// of VM bugs. They are hidden so that users will not be encouraged to 38891141Scjc// try them as if they were VM ordinary execution options. However, they 38991141Scjc// are available in the product version of the VM. Under instruction 39091141Scjc// from support engineers, VM customers can turn them on to collect 39191141Scjc// diagnostic information about VM problems. To use a VM diagnostic 39291141Scjc// option, you must first specify +UnlockDiagnosticVMOptions. 39391141Scjc// (This master switch also affects the behavior of -Xprintflags.) 39491141Scjc// 39591141Scjc// experimental flags are in support of features that are not 3967685Sache// part of the officially supported product, but are available 3977685Sache// for experimenting with. They could, for example, be performance 39891141Scjc// features that may not have undergone full or rigorous QA, but which may 39991141Scjc// help performance in some cases and released for experimentation 4007685Sache// by the community of users and developers. This flag also allows one to 4017685Sache// be able to build a fully supported product that nonetheless also 4027685Sache// ships with some unsupported, lightly tested, experimental features. 403705Swollman// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 4047685Sache// UnlockExperimentalVMOptions flag, which allows the control and 4057685Sache// modification of the experimental flags. 40691141Scjc// 40791141Scjc// Nota bene: neither diagnostic nor experimental options should be used casually, 40891141Scjc// and they are not supported on production loads, except under explicit 40991141Scjc// direction from support engineers. 41091141Scjc// 41191141Scjc// manageable flags are writeable external product flags. 41291141Scjc// They are dynamically writeable through the JDK management interface 41391141Scjc// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 41491141Scjc// These flags are external exported interface (see CCC). The list of 41591141Scjc// manageable flags can be queried programmatically through the management 41691141Scjc// interface. 41791141Scjc// 41891141Scjc// A flag can be made as "manageable" only if 41991141Scjc// - the flag is defined in a CCC as an external exported interface. 42091141Scjc// - the VM implementation supports dynamic setting of the flag. 42191141Scjc// This implies that the VM must *always* query the flag variable 422131994Scperciva// and not reuse state related to the flag state at any given time. 423131994Scperciva// - you want the flag to be queried programmatically by the customers. 42439139Sobrien// 42539139Sobrien// product_rw flags are writeable internal product flags. 42639139Sobrien// They are like "manageable" flags but for internal/private use. 42739139Sobrien// The list of product_rw flags are internal/private flags which 4287685Sache// may be changed/removed in a future release. It can be set 4297685Sache// through the management interface to get/set value 4307685Sache// when the name of flag is supplied. 4317685Sache// 43291141Scjc// A flag can be made as "product_rw" only if 43391141Scjc// - the VM implementation supports dynamic setting of the flag. 4347685Sache// This implies that the VM must *always* query the flag variable 435705Swollman// and not reuse state related to the flag state at any given time. 4367685Sache// 4377685Sache// Note that when there is a need to support develop flags to be writeable, 4387685Sache// it can be done in the same way as product_rw. 4397685Sache 440131994Scperciva#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 441131994Scperciva \ 4427685Sache lp64_product(bool, UseCompressedOops, false, \ 4437685Sache "Use 32-bit object references in 64-bit VM. " \ 4447685Sache "lp64_product means flag is always constant in 32 bit VM") \ 4457685Sache \ 44691141Scjc notproduct(bool, CheckCompressedOops, true, \ 44791141Scjc "generate checks in encoding/decoding code in debug VM") \ 448169784Sgrog \ 449169784Sgrog product_pd(uintx, HeapBaseMinAddress, \ 45091141Scjc "OS specific low limit for heap base address") \ 45191141Scjc \ 45291141Scjc diagnostic(bool, PrintCompressedOopsMode, false, \ 45391141Scjc "Print compressed oops base address and encoding mode") \ 45491141Scjc \ 45591141Scjc lp64_product(intx, ObjectAlignmentInBytes, 8, \ 456169784Sgrog "Default object alignment in bytes, 8 is minimum") \ 457169784Sgrog \ 45839139Sobrien /* UseMembar is theoretically a temp flag used for memory barrier \ 45939139Sobrien * removal testing. It was supposed to be removed before FCS but has \ 46091141Scjc * been re-added (see 6401008) */ \ 46191141Scjc product_pd(bool, UseMembar, \ 46239139Sobrien "(Unstable) Issues membars on thread state transitions") \ 46339139Sobrien \ 4647685Sache /* Temp PPC Flag to allow disabling the use of lwsync on ppc platforms \ 4657685Sache * that don't support it. This will be replaced by processor detection \ 46691141Scjc * logic. \ 46791141Scjc */ \ 46839139Sobrien product(bool, UsePPCLWSYNC, true, \ 46939139Sobrien "Use lwsync instruction if true, else use slower sync") \ 47039139Sobrien \ 47139139Sobrien develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 472169590Sgrog "Whether to clean the chunk pool asynchronously") \ 47339139Sobrien \ 47439139Sobrien /* Temporary: See 6948537 */ \ 47539139Sobrien experimental(bool, UseMemSetInBOT, true, \ 47639139Sobrien "(Unstable) uses memset in BOT updates in GC code") \ 47739139Sobrien \ 47839139Sobrien diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 47939139Sobrien "Enable normal processing of flags relating to field diagnostics")\ 48039139Sobrien \ 48139139Sobrien experimental(bool, UnlockExperimentalVMOptions, false, \ 48239139Sobrien "Enable normal processing of flags relating to experimental features")\ 48339139Sobrien \ 48439139Sobrien product(bool, JavaMonitorsInStackTrace, true, \ 48539139Sobrien "Print info. about Java monitor locks when the stacks are dumped")\ 48639139Sobrien \ 48739139Sobrien product_pd(bool, UseLargePages, \ 48839139Sobrien "Use large page memory") \ 489169784Sgrog \ 490169784Sgrog product_pd(bool, UseLargePagesIndividualAllocation, \ 491169784Sgrog "Allocate large pages individually for better affinity") \ 492169784Sgrog \ 493169784Sgrog develop(bool, LargePagesIndividualAllocationInjectError, false, \ 494169784Sgrog "Fail large pages individual allocation") \ 495169784Sgrog \ 496169784Sgrog develop(bool, TracePageSizes, false, \ 497169784Sgrog "Trace page size selection and usage.") \ 49839139Sobrien \ 49939139Sobrien product(bool, UseNUMA, false, \ 50039139Sobrien "Use NUMA if available") \ 50139139Sobrien \ 50239139Sobrien product(bool, UseNUMAInterleaving, false, \ 50339139Sobrien "Interleave memory across NUMA nodes if available") \ 504169784Sgrog \ 505169784Sgrog product(uintx, NUMAInterleaveGranularity, 2*M, \ 506169784Sgrog "Granularity to use for NUMA interleaving on Windows OS") \ 507169784Sgrog \ 508169784Sgrog product(bool, ForceNUMA, false, \ 509169784Sgrog "Force NUMA optimizations on single-node/UMA systems") \ 510169784Sgrog \ 511169784Sgrog product(intx, NUMAChunkResizeWeight, 20, \ 512169784Sgrog "Percentage (0-100) used to weight the current sample when " \ 513169784Sgrog "computing exponentially decaying average for " \ 51439139Sobrien "AdaptiveNUMAChunkSizing") \ 51539139Sobrien \ 51639139Sobrien product(intx, NUMASpaceResizeRate, 1*G, \ 51739139Sobrien "Do not reallocate more that this amount per collection") \ 51839139Sobrien \ 51991141Scjc product(bool, UseAdaptiveNUMAChunkSizing, true, \ 52039139Sobrien "Enable adaptive chunk sizing for NUMA") \ 52139139Sobrien \ 52239139Sobrien product(bool, NUMAStats, false, \ 52339139Sobrien "Print NUMA stats in detailed heap information") \ 52439139Sobrien \ 52539139Sobrien product(intx, NUMAPageScanRate, 256, \ 52639139Sobrien "Maximum number of pages to include in the page scan procedure") \ 52739139Sobrien \ 52839139Sobrien product_pd(bool, NeedsDeoptSuspend, \ 52939139Sobrien "True for register window machines (sparc/ia64)") \ 53039139Sobrien \ 53139139Sobrien product(intx, UseSSE, 99, \ 53239139Sobrien "Highest supported SSE instructions set on x86/x64") \ 53339139Sobrien \ 534169784Sgrog product(intx, UseAVX, 99, \ 535169784Sgrog "Highest supported AVX instructions set on x86/x64") \ 536169784Sgrog \ 537169784Sgrog product(intx, UseVIS, 99, \ 538169784Sgrog "Highest supported VIS instructions set on Sparc") \ 539169784Sgrog \ 54039139Sobrien product(uintx, LargePageSizeInBytes, 0, \ 54139139Sobrien "Large page size (0 to let VM choose the page size") \ 542169784Sgrog \ 543169784Sgrog product(uintx, LargePageHeapSizeThreshold, 128*M, \ 544169784Sgrog "Use large pages if max heap is at least this big") \ 545169784Sgrog \ 546169784Sgrog product(bool, ForceTimeHighResolution, false, \ 547169784Sgrog "Using high time resolution(For Win32 only)") \ 5487685Sache \ 5497685Sache develop(bool, TraceItables, false, \ 5507685Sache "Trace initialization and use of itables") \ 5517685Sache \ 5527685Sache develop(bool, TracePcPatching, false, \ 5537685Sache "Trace usage of frame::patch_pc") \ 5547685Sache \ 5557685Sache develop(bool, TraceJumps, false, \ 5567685Sache "Trace assembly jumps in thread ring buffer") \ 5577685Sache \ 55839139Sobrien develop(bool, TraceRelocator, false, \ 55939139Sobrien "Trace the bytecode relocator") \ 56039139Sobrien \ 56139139Sobrien develop(bool, TraceLongCompiles, false, \ 56239139Sobrien "Print out every time compilation is longer than " \ 56339139Sobrien "a given threashold") \ 56439139Sobrien \ 565131994Scperciva develop(bool, SafepointALot, false, \ 56639139Sobrien "Generates a lot of safepoints. Works with " \ 56739139Sobrien "GuaranteedSafepointInterval") \ 568131994Scperciva \ 569131994Scperciva product_pd(bool, BackgroundCompilation, \ 57039139Sobrien "A thread requesting compilation is not blocked during " \ 57139139Sobrien "compilation") \ 57239139Sobrien \ 57339139Sobrien product(bool, PrintVMQWaitTime, false, \ 57439139Sobrien "Prints out the waiting time in VM operation queue") \ 57539139Sobrien \ 57639139Sobrien develop(bool, BailoutToInterpreterForThrows, false, \ 57739139Sobrien "Compiled methods which throws/catches exceptions will be " \ 57839139Sobrien "deopt and intp.") \ 57939139Sobrien \ 58039139Sobrien develop(bool, NoYieldsInMicrolock, false, \ 58139139Sobrien "Disable yields in microlock") \ 58239139Sobrien \ 58339139Sobrien develop(bool, TraceOopMapGeneration, false, \ 58439139Sobrien "Shows oopmap generation") \ 58539139Sobrien \ 58639139Sobrien product(bool, MethodFlushing, true, \ 58739139Sobrien "Reclamation of zombie and not-entrant methods") \ 58839139Sobrien \ 58939139Sobrien develop(bool, VerifyStack, false, \ 59039139Sobrien "Verify stack of each thread when it is entering a runtime call") \ 59139139Sobrien \ 59239139Sobrien diagnostic(bool, ForceUnreachable, false, \ 59339139Sobrien "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \ 594131994Scperciva \ 595131994Scperciva notproduct(bool, StressDerivedPointers, false, \ 59639139Sobrien "Force scavenge when a derived pointers is detected on stack " \ 59739139Sobrien "after rtm call") \ 59839139Sobrien \ 59939139Sobrien develop(bool, TraceDerivedPointers, false, \ 60039139Sobrien "Trace traversal of derived pointers on stack") \ 60139139Sobrien \ 60239139Sobrien notproduct(bool, TraceCodeBlobStacks, false, \ 60339139Sobrien "Trace stack-walk of codeblobs") \ 60439139Sobrien \ 60539139Sobrien product(bool, PrintJNIResolving, false, \ 6067685Sache "Used to implement -v:jni") \ 6077685Sache \ 60839139Sobrien notproduct(bool, PrintRewrites, false, \ 60939139Sobrien "Print methods that are being rewritten") \ 61039139Sobrien \ 61139139Sobrien product(bool, UseInlineCaches, true, \ 61239139Sobrien "Use Inline Caches for virtual calls ") \ 61339139Sobrien \ 6147685Sache develop(bool, InlineArrayCopy, true, \ 6157685Sache "inline arraycopy native that is known to be part of " \ 61691141Scjc "base library DLL") \ 6177685Sache \ 6187685Sache develop(bool, InlineObjectHash, true, \ 6197685Sache "inline Object::hashCode() native that is known to be part " \ 6207685Sache "of base library DLL") \ 6217685Sache \ 6227685Sache develop(bool, InlineObjectCopy, true, \ 6237685Sache "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 6247685Sache \ 6257685Sache develop(bool, InlineNatives, true, \ 6267685Sache "inline natives that are known to be part of base library DLL") \ 6277685Sache \ 62891141Scjc develop(bool, InlineMathNatives, true, \ 62991141Scjc "inline SinD, CosD, etc.") \ 6307685Sache \ 6317685Sache develop(bool, InlineClassNatives, true, \ 6327685Sache "inline Class.isInstance, etc") \ 6337685Sache \ 6347685Sache develop(bool, InlineThreadNatives, true, \ 63534344Ssteve "inline Thread.currentThread, etc") \ 6367685Sache \ 6377685Sache develop(bool, InlineReflectionGetCallerClass, true, \ 6387685Sache "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 6397685Sache "of base library DLL") \ 6407685Sache \ 6417685Sache develop(bool, InlineUnsafeOps, true, \ 6427685Sache "inline memory ops (native methods) from sun.misc.Unsafe") \ 6437685Sache \ 6447685Sache develop(bool, ConvertCmpD2CmpF, true, \ 6457685Sache "Convert cmpD to cmpF when one input is constant in float range") \ 6467685Sache \ 6477685Sache develop(bool, ConvertFloat2IntClipping, true, \ 64891141Scjc "Convert float2int clipping idiom to integer clipping") \ 64991141Scjc \ 6507685Sache develop(bool, SpecialStringCompareTo, true, \ 6517685Sache "special version of string compareTo") \ 6527685Sache \ 6537685Sache develop(bool, SpecialStringIndexOf, true, \ 6547685Sache "special version of string indexOf") \ 6557685Sache \ 6567685Sache develop(bool, SpecialStringEquals, true, \ 6577685Sache "special version of string equals") \ 6587685Sache \ 6597685Sache develop(bool, SpecialArraysEquals, true, \ 6607685Sache "special version of Arrays.equals(char[],char[])") \ 6617685Sache \ 6627685Sache product(bool, CriticalJNINatives, true, \ 6637685Sache "check for critical JNI entry points") \ 6647685Sache \ 6657685Sache notproduct(bool, StressCriticalJNINatives, false, \ 6667685Sache "Exercise register saving code in critical natives") \ 6677685Sache \ 6687685Sache product(bool, UseSSE42Intrinsics, false, \ 6697685Sache "SSE4.2 versions of intrinsics") \ 6707685Sache \ 6717685Sache product(bool, UseCondCardMark, false, \ 6727685Sache "Check for already marked card before updating card table") \ 6737685Sache \ 6747685Sache develop(bool, TraceCallFixup, false, \ 6757685Sache "traces all call fixups") \ 6767685Sache \ 6777685Sache develop(bool, DeoptimizeALot, false, \ 6787685Sache "deoptimize at every exit from the runtime system") \ 6797685Sache \ 6807685Sache notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 6817685Sache "a comma separated list of bcis to deoptimize at") \ 6827685Sache \ 6837685Sache product(bool, DeoptimizeRandom, false, \ 6847685Sache "deoptimize random frames on random exit from the runtime system")\ 6857685Sache \ 6867685Sache notproduct(bool, ZombieALot, false, \ 6877685Sache "creates zombies (non-entrant) at exit from the runt. system") \ 6887685Sache \ 6897685Sache product(bool, UnlinkSymbolsALot, false, \ 6907685Sache "unlink unreferenced symbols from the symbol table at safepoints")\ 6917685Sache \ 6927685Sache notproduct(bool, WalkStackALot, false, \ 6937685Sache "trace stack (no print) at every exit from the runtime system") \ 6947685Sache \ 6957685Sache product(bool, Debugging, false, \ 6967685Sache "set when executing debug methods in debug.ccp " \ 6977685Sache "(to prevent triggering assertions)") \ 6987685Sache \ 6997685Sache notproduct(bool, StrictSafepointChecks, trueInDebug, \ 7007685Sache "Enable strict checks that safepoints cannot happen for threads " \ 7017685Sache "that used No_Safepoint_Verifier") \ 7027685Sache \ 7037685Sache notproduct(bool, VerifyLastFrame, false, \ 7047685Sache "Verify oops on last frame on entry to VM") \ 7057685Sache \ 7067685Sache develop(bool, TraceHandleAllocation, false, \ 7077685Sache "Prints out warnings when suspicious many handles are allocated") \ 7087685Sache \ 7097685Sache product(bool, UseCompilerSafepoints, true, \ 7107685Sache "Stop at safepoints in compiled code") \ 7117685Sache \ 7127685Sache product(bool, UseSplitVerifier, true, \ 7137685Sache "use split verifier with StackMapTable attributes") \ 7147685Sache \ 7157685Sache product(bool, FailOverToOldVerifier, true, \ 7167685Sache "fail over to old verifier when split verifier fails") \ 7177685Sache \ 7187685Sache develop(bool, ShowSafepointMsgs, false, \ 7197685Sache "Show msg. about safepoint synch.") \ 7207685Sache \ 7217685Sache product(bool, SafepointTimeout, false, \ 7227685Sache "Time out and warn or fail after SafepointTimeoutDelay " \ 7237685Sache "milliseconds if failed to reach safepoint") \ 7247685Sache \ 7257685Sache develop(bool, DieOnSafepointTimeout, false, \ 7267685Sache "Die upon failure to reach safepoint (see SafepointTimeout)") \ 7277685Sache \ 7287685Sache /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 7297685Sache /* typically, at most a few retries are needed */ \ 7307685Sache product(intx, SuspendRetryCount, 50, \ 7317685Sache "Maximum retry count for an external suspend request") \ 7327685Sache \ 7337685Sache product(intx, SuspendRetryDelay, 5, \ 7347685Sache "Milliseconds to delay per retry (* current_retry_count)") \ 7357685Sache \ 7367685Sache product(bool, AssertOnSuspendWaitFailure, false, \ 7377685Sache "Assert/Guarantee on external suspend wait failure") \ 7387685Sache \ 7397685Sache product(bool, TraceSuspendWaitFailures, false, \ 7407685Sache "Trace external suspend wait failures") \ 7417685Sache \ 7427685Sache product(bool, MaxFDLimit, true, \ 7437685Sache "Bump the number of file descriptors to max in solaris.") \ 7447685Sache \ 7457685Sache diagnostic(bool, LogEvents, true, \ 7467685Sache "Enable the various ring buffer event logs") \ 7477685Sache \ 7487685Sache diagnostic(intx, LogEventsBufferEntries, 10, \ 7497685Sache "Enable the various ring buffer event logs") \ 750215249Stuexen \ 7517685Sache product(bool, BytecodeVerificationRemote, true, \ 7527685Sache "Enables the Java bytecode verifier for remote classes") \ 7537685Sache \ 7547685Sache product(bool, BytecodeVerificationLocal, false, \ 7557685Sache "Enables the Java bytecode verifier for local classes") \ 7567685Sache \ 7577685Sache develop(bool, ForceFloatExceptions, trueInDebug, \ 7587685Sache "Force exceptions on FP stack under/overflow") \ 7597685Sache \ 7607685Sache develop(bool, SoftMatchFailure, trueInProduct, \ 7617685Sache "If the DFA fails to match a node, print a message and bail out") \ 76239139Sobrien \ 76339139Sobrien develop(bool, VerifyStackAtCalls, false, \ 7647685Sache "Verify that the stack pointer is unchanged after calls") \ 7657685Sache \ 7667685Sache develop(bool, TraceJavaAssertions, false, \ 7677685Sache "Trace java language assertions") \ 7687685Sache \ 7697685Sache notproduct(bool, CheckAssertionStatusDirectives, false, \ 7707685Sache "temporary - see javaClasses.cpp") \ 7717685Sache \ 7727685Sache notproduct(bool, PrintMallocFree, false, \ 7737685Sache "Trace calls to C heap malloc/free allocation") \ 7747685Sache \ 7757685Sache product(bool, PrintOopAddress, false, \ 7767685Sache "Always print the location of the oop") \ 7777685Sache \ 7787685Sache notproduct(bool, VerifyCodeCacheOften, false, \ 7797685Sache "Verify compiled-code cache often") \ 7807685Sache \ 7817685Sache develop(bool, ZapDeadCompiledLocals, false, \ 7827685Sache "Zap dead locals in compiler frames") \ 7837685Sache \ 7847685Sache notproduct(bool, ZapDeadLocalsOld, false, \ 7857685Sache "Zap dead locals (old version, zaps all frames when " \ 7867685Sache "entering the VM") \ 7877685Sache \ 7887685Sache notproduct(bool, CheckOopishValues, false, \ 7897685Sache "Warn if value contains oop ( requires ZapDeadLocals)") \ 7907685Sache \ 7917685Sache develop(bool, UseMallocOnly, false, \ 7927685Sache "use only malloc/free for allocation (no resource area/arena)") \ 7937685Sache \ 79439139Sobrien develop(bool, PrintMalloc, false, \ 79539139Sobrien "print all malloc/free calls") \ 79639139Sobrien \ 79739139Sobrien develop(bool, PrintMallocStatistics, false, \ 79839139Sobrien "print malloc/free statistics") \ 799169590Sgrog \ 800169590Sgrog develop(bool, ZapResourceArea, trueInDebug, \ 80139139Sobrien "Zap freed resource/arena space with 0xABABABAB") \ 80239139Sobrien \ 80339139Sobrien notproduct(bool, ZapVMHandleArea, trueInDebug, \ 80439139Sobrien "Zap freed VM handle space with 0xBCBCBCBC") \ 80539139Sobrien \ 80639139Sobrien develop(bool, ZapJNIHandleArea, trueInDebug, \ 80739139Sobrien "Zap freed JNI handle space with 0xFEFEFEFE") \ 80839139Sobrien \ 80939139Sobrien notproduct(bool, ZapStackSegments, trueInDebug, \ 81039139Sobrien "Zap allocated/freed Stack segments with 0xFADFADED") \ 81139139Sobrien \ 81239139Sobrien develop(bool, ZapUnusedHeapArea, trueInDebug, \ 81339139Sobrien "Zap unused heap space with 0xBAADBABE") \ 81439139Sobrien \ 81539139Sobrien develop(bool, TraceZapUnusedHeapArea, false, \ 81639139Sobrien "Trace zapping of unused heap space") \ 81739139Sobrien \ 81839139Sobrien develop(bool, CheckZapUnusedHeapArea, false, \ 81939139Sobrien "Check zapping of unused heap space") \ 82039139Sobrien \ 82139139Sobrien develop(bool, ZapFillerObjects, trueInDebug, \ 82239139Sobrien "Zap filler objects with 0xDEAFBABE") \ 82339139Sobrien \ 82439139Sobrien develop(bool, PrintVMMessages, true, \ 82539139Sobrien "Print vm messages on console") \ 82639139Sobrien \ 82739139Sobrien product(bool, PrintGCApplicationConcurrentTime, false, \ 82839139Sobrien "Print the time the application has been running") \ 82939139Sobrien \ 83039139Sobrien product(bool, PrintGCApplicationStoppedTime, false, \ 83139139Sobrien "Print the time the application has been stopped") \ 83239139Sobrien \ 83339139Sobrien notproduct(uintx, ErrorHandlerTest, 0, \ 83439139Sobrien "If > 0, provokes an error after VM initialization; the value" \ 83539139Sobrien "determines which error to provoke. See test_error_handler()" \ 83639139Sobrien "in debug.cpp.") \ 83739139Sobrien \ 83839139Sobrien develop(bool, Verbose, false, \ 83939139Sobrien "Prints additional debugging information from other modes") \ 84039139Sobrien \ 84139139Sobrien develop(bool, PrintMiscellaneous, false, \ 84239139Sobrien "Prints uncategorized debugging information (requires +Verbose)") \ 84339139Sobrien \ 84439139Sobrien develop(bool, WizardMode, false, \ 84539139Sobrien "Prints much more debugging information") \ 84639139Sobrien \ 84739139Sobrien product(bool, ShowMessageBoxOnError, false, \ 84839139Sobrien "Keep process alive on VM fatal error") \ 84939139Sobrien \ 85039139Sobrien product(bool, CreateMinidumpOnCrash, false, \ 85139139Sobrien "Create minidump on VM fatal error") \ 85239139Sobrien \ 85339139Sobrien product_pd(bool, UseOSErrorReporting, \ 85439139Sobrien "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 85539139Sobrien \ 85639139Sobrien product(bool, SuppressFatalErrorMessage, false, \ 85739139Sobrien "Do NO Fatal Error report [Avoid deadlock]") \ 85839139Sobrien \ 85939139Sobrien product(ccstrlist, OnError, "", \ 86039139Sobrien "Run user-defined commands on fatal error; see VMError.cpp " \ 86139139Sobrien "for examples") \ 86239139Sobrien \ 86339139Sobrien product(ccstrlist, OnOutOfMemoryError, "", \ 86439139Sobrien "Run user-defined commands on first java.lang.OutOfMemoryError") \ 86539139Sobrien \ 86639139Sobrien manageable(bool, HeapDumpBeforeFullGC, false, \ 86739139Sobrien "Dump heap to file before any major stop-world GC") \ 86839139Sobrien \ 86939139Sobrien manageable(bool, HeapDumpAfterFullGC, false, \ 87039139Sobrien "Dump heap to file after any major stop-world GC") \ 87139139Sobrien \ 87239139Sobrien manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 87339139Sobrien "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 87439139Sobrien \ 87539139Sobrien manageable(ccstr, HeapDumpPath, NULL, \ 87639139Sobrien "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 87739139Sobrien "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 87839139Sobrien "in the working directory)") \ 87939139Sobrien \ 88039139Sobrien develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 88139139Sobrien "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 88239139Sobrien "when the heap usage is larger than this") \ 88339139Sobrien \ 88439139Sobrien develop(uintx, HeapDumpSegmentSize, 1*G, \ 88539139Sobrien "Approximate segment size when generating a segmented heap dump") \ 88639139Sobrien \ 88739139Sobrien develop(bool, BreakAtWarning, false, \ 88839139Sobrien "Execute breakpoint upon encountering VM warning") \ 88939139Sobrien \ 89039139Sobrien product_pd(bool, UseVectoredExceptions, \ 89139139Sobrien "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 89239139Sobrien \ 89339139Sobrien develop(bool, TraceVMOperation, false, \ 89439139Sobrien "Trace vm operations") \ 89539139Sobrien \ 89637Srgrimes develop(bool, UseFakeTimers, false, \ 8971088Swollman "Tells whether the VM should use system time or a fake timer") \ 89837Srgrimes \ 8997685Sache diagnostic(bool, LogCompilation, false, \ 9007685Sache "Log compilation activity in detail to hotspot.log or LogFile") \ 90168690Sben \ 9027685Sache product(bool, PrintCompilation, false, \ 9037685Sache "Print compilations") \ 9047685Sache \ 9057685Sache diagnostic(bool, TraceNMethodInstalls, false, \ 9067685Sache "Trace nmethod intallation") \ 9077685Sache \ 9087685Sache diagnostic(intx, ScavengeRootsInCode, 2, \ 9097685Sache "0: do not allow scavengable oops in the code cache; " \ 9107685Sache "1: allow scavenging from the code cache; " \ 9117685Sache "2: emit as many constants as the compiler can see") \ 9127685Sache \ 9137685Sache diagnostic(bool, TraceOSRBreakpoint, false, \ 9147685Sache "Trace OSR Breakpoint ") \ 91539139Sobrien \ 9167685Sache diagnostic(bool, TraceCompileTriggered, false, \ 9177685Sache "Trace compile triggered") \ 91837Srgrimes \ 9197685Sache diagnostic(bool, TraceTriggers, false, \ 9207685Sache "Trace triggers") \ 92139139Sobrien \ 92239139Sobrien product(bool, AlwaysRestoreFPU, false, \ 9237685Sache "Restore the FPU control word after every JNI call (expensive)") \ 9247685Sache \ 9257685Sache diagnostic(bool, PrintCompilation2, false, \ 9267685Sache "Print additional statistics per compilation") \ 9277685Sache \ 9287685Sache diagnostic(bool, PrintAdapterHandlers, false, \ 9297685Sache "Print code generated for i2c/c2i adapters") \ 9307685Sache \ 9317685Sache develop(bool, VerifyAdapterSharing, false, \ 9327685Sache "Verify that the code for shared adapters is the equivalent") \ 9337685Sache \ 93437Srgrimes diagnostic(bool, PrintAssembly, false, \ 9357685Sache "Print assembly code (using external disassembler.so)") \ 9367685Sache \ 9377685Sache diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 938131994Scperciva "Options string passed to disassembler.so") \ 9397685Sache \ 9407685Sache diagnostic(bool, PrintNMethods, false, \ 94139139Sobrien "Print assembly code for nmethods when generated") \ 94239139Sobrien \ 94339139Sobrien diagnostic(bool, PrintNativeNMethods, false, \ 94439139Sobrien "Print assembly code for native nmethods when generated") \ 94539139Sobrien \ 94639139Sobrien develop(bool, PrintDebugInfo, false, \ 94739139Sobrien "Print debug information for all nmethods when generated") \ 94839139Sobrien \ 9497685Sache develop(bool, PrintRelocations, false, \ 9507685Sache "Print relocation information for all nmethods when generated") \ 9517685Sache \ 9527685Sache develop(bool, PrintDependencies, false, \ 95339139Sobrien "Print dependency information for all nmethods when generated") \ 95439139Sobrien \ 95539139Sobrien develop(bool, PrintExceptionHandlers, false, \ 95639139Sobrien "Print exception handler tables for all nmethods when generated") \ 95739139Sobrien \ 95839139Sobrien develop(bool, InterceptOSException, false, \ 9597685Sache "Starts debugger when an implicit OS (e.g., NULL) " \ 9607685Sache "exception happens") \ 9617685Sache \ 9627685Sache notproduct(bool, PrintCodeCache, false, \ 9637685Sache "Print the compiled_code cache when exiting") \ 9647685Sache \ 9657685Sache develop(bool, PrintCodeCache2, false, \ 9667685Sache "Print detailed info on the compiled_code cache when exiting") \ 96739139Sobrien \ 96839139Sobrien diagnostic(bool, PrintStubCode, false, \ 96939139Sobrien "Print generated stub code") \ 97039139Sobrien \ 97139139Sobrien product(bool, StackTraceInThrowable, true, \ 97239139Sobrien "Collect backtrace in throwable when exception happens") \ 97339139Sobrien \ 97439139Sobrien product(bool, OmitStackTraceInFastThrow, true, \ 97539139Sobrien "Omit backtraces for some 'hot' exceptions in optimized code") \ 97639139Sobrien \ 9777685Sache product(bool, ProfilerPrintByteCodeStatistics, false, \ 9787685Sache "Prints byte code statictics when dumping profiler output") \ 9797685Sache \ 9807685Sache product(bool, ProfilerRecordPC, false, \ 9817685Sache "Collects tick for each 16 byte interval of compiled code") \ 9827685Sache \ 98339139Sobrien product(bool, ProfileVM, false, \ 98439139Sobrien "Profiles ticks that fall within VM (either in the VM Thread " \ 985131994Scperciva "or VM code called through stubs)") \ 986131994Scperciva \ 9877685Sache product(bool, ProfileIntervals, false, \ 9887685Sache "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 9897685Sache \ 9907685Sache notproduct(bool, ProfilerCheckIntervals, false, \ 99191141Scjc "Collect and print info on spacing of profiler ticks") \ 99291141Scjc \ 99391141Scjc develop(bool, PrintJVMWarnings, false, \ 99491141Scjc "Prints warnings for unimplemented JVM functions") \ 99539139Sobrien \ 99639139Sobrien product(bool, PrintWarnings, true, \ 99739139Sobrien "Prints JVM warnings to output stream") \ 99839139Sobrien \ 9997685Sache notproduct(uintx, WarnOnStalledSpinLock, 0, \ 10007685Sache "Prints warnings for stalled SpinLocks") \ 10017685Sache \ 10027685Sache develop(bool, InitializeJavaLangSystem, true, \ 10037685Sache "Initialize java.lang.System - turn off for individual " \ 10047685Sache "method debugging") \ 10057685Sache \ 10067685Sache develop(bool, InitializeJavaLangString, true, \ 100739139Sobrien "Initialize java.lang.String - turn off for individual " \ 100839139Sobrien "method debugging") \ 10097685Sache \ 10107685Sache develop(bool, InitializeJavaLangExceptionsErrors, true, \ 10117685Sache "Initialize various error and exception classes - turn off for " \ 10127685Sache "individual method debugging") \ 10137685Sache \ 10147685Sache product(bool, RegisterFinalizersAtInit, true, \ 10157685Sache "Register finalizable objects at end of Object.<init> or " \ 10167685Sache "after allocation") \ 10177685Sache \ 10187685Sache develop(bool, RegisterReferences, true, \ 10197685Sache "Tells whether the VM should register soft/weak/final/phantom " \ 10207685Sache "references") \ 10217685Sache \ 10227685Sache develop(bool, IgnoreRewrites, false, \ 10237685Sache "Supress rewrites of bytecodes in the oopmap generator. " \ 10247685Sache "This is unsafe!") \ 102539139Sobrien \ 102639139Sobrien develop(bool, PrintCodeCacheExtension, false, \ 10277685Sache "Print extension of code cache") \ 10287685Sache \ 10297685Sache develop(bool, UsePrivilegedStack, true, \ 10307685Sache "Enable the security JVM functions") \ 103139139Sobrien \ 1032169784Sgrog develop(bool, IEEEPrecision, true, \ 103339139Sobrien "Enables IEEE precision (for INTEL only)") \ 103439139Sobrien \ 103539139Sobrien develop(bool, ProtectionDomainVerification, true, \ 103639139Sobrien "Verifies protection domain before resolution in system " \ 103739139Sobrien "dictionary") \ 103839139Sobrien \ 10397685Sache product(bool, ClassUnloading, true, \ 10407685Sache "Do unloading of classes") \ 10417685Sache \ 10427685Sache diagnostic(bool, LinkWellKnownClasses, false, \ 104339139Sobrien "Resolve a well known class as soon as its name is seen") \ 104439139Sobrien \ 104539139Sobrien develop(bool, DisableStartThread, false, \ 104639139Sobrien "Disable starting of additional Java threads " \ 104739139Sobrien "(for debugging only)") \ 104839139Sobrien \ 104939139Sobrien develop(bool, MemProfiling, false, \ 105039139Sobrien "Write memory usage profiling to log file") \ 105139139Sobrien \ 105239139Sobrien notproduct(bool, PrintSystemDictionaryAtExit, false, \ 105339139Sobrien "Prints the system dictionary at exit") \ 105439139Sobrien \ 105539139Sobrien experimental(intx, PredictedLoadedClassCount, 0, \ 105639139Sobrien "Experimental: Tune loaded class cache starting size.") \ 105739139Sobrien \ 105839139Sobrien diagnostic(bool, UnsyncloadClass, false, \ 105939139Sobrien "Unstable: VM calls loadClass unsynchronized. Custom " \ 106039139Sobrien "class loader must call VM synchronized for findClass " \ 106139139Sobrien "and defineClass.") \ 106239139Sobrien \ 106339139Sobrien product(bool, AlwaysLockClassLoader, false, \ 106439139Sobrien "Require the VM to acquire the class loader lock before calling " \ 106539139Sobrien "loadClass() even for class loaders registering " \ 106639139Sobrien "as parallel capable") \ 106739139Sobrien \ 106839139Sobrien product(bool, AllowParallelDefineClass, false, \ 1069108664Sschweikh "Allow parallel defineClass requests for class loaders " \ 1070108664Sschweikh "registering as parallel capable") \ 1071108664Sschweikh \ 107291141Scjc product(bool, MustCallLoadClassInternal, false, \ 107339139Sobrien "Call loadClassInternal() rather than loadClass()") \ 107439139Sobrien \ 107539139Sobrien product_pd(bool, DontYieldALot, \ 107639139Sobrien "Throw away obvious excess yield calls (for SOLARIS only)") \ 107739139Sobrien \ 107839139Sobrien product_pd(bool, ConvertSleepToYield, \ 107939139Sobrien "Converts sleep(0) to thread yield " \ 108039139Sobrien "(may be off for SOLARIS to improve GUI)") \ 108139139Sobrien \ 108239139Sobrien product(bool, ConvertYieldToSleep, false, \ 108339139Sobrien "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 108439139Sobrien "behavior (SOLARIS only)") \ 108539139Sobrien \ 108639139Sobrien product(bool, UseBoundThreads, true, \ 108739139Sobrien "Bind user level threads to kernel threads (for SOLARIS only)") \ 108839139Sobrien \ 108939139Sobrien develop(bool, UseDetachedThreads, true, \ 109039139Sobrien "Use detached threads that are recycled upon termination " \ 109139139Sobrien "(for SOLARIS only)") \ 109239139Sobrien \ 109339139Sobrien product(bool, UseLWPSynchronization, true, \ 109439139Sobrien "Use LWP-based instead of libthread-based synchronization " \ 109539139Sobrien "(SPARC only)") \ 109639139Sobrien \ 109739139Sobrien product(ccstr, SyncKnobs, NULL, \ 109839139Sobrien "(Unstable) Various monitor synchronization tunables") \ 109939139Sobrien \ 11007685Sache product(intx, EmitSync, 0, \ 11017685Sache "(Unsafe,Unstable) " \ 1102169784Sgrog " Controls emission of inline sync fast-path code") \ 1103169784Sgrog \ 1104169784Sgrog product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 1105169784Sgrog \ 1106169784Sgrog product(intx, MonitorBound, 0, "Bound Monitor population") \ 1107169784Sgrog \ 1108169784Sgrog product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1109169784Sgrog \ 1110169784Sgrog product(intx, Atomics, 0, \ 1111169784Sgrog "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 1112131732Scperciva \ 1113131732Scperciva product(intx, FenceInstruction, 0, \ 11147685Sache "(Unsafe,Unstable) Experimental") \ 11157685Sache \ 111691141Scjc product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 11177685Sache \ 11187685Sache product(intx, SyncVerbose, 0, "(Unstable)" ) \ 11197685Sache \ 11207685Sache product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 11217685Sache \ 11227685Sache product(intx, hashCode, 0, \ 11237685Sache "(Unstable) select hashCode generation algorithm" ) \ 1124169784Sgrog \ 1125169784Sgrog product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 1126169784Sgrog "(Unstable, Linux-specific)" \ 1127169784Sgrog " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 112880266Sdougb \ 112980266Sdougb product(bool, FilterSpuriousWakeups, true, \ 1130169784Sgrog "Prevent spurious or premature wakeups from object.wait " \ 1131169784Sgrog "(Solaris only)") \ 1132169784Sgrog \ 1133169784Sgrog product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 1134169784Sgrog product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 1135169784Sgrog product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 1136169784Sgrog \ 1137169784Sgrog develop(bool, UsePthreads, false, \ 1138169784Sgrog "Use pthread-based instead of libthread-based synchronization " \ 1139169784Sgrog "(SPARC only)") \ 1140169784Sgrog \ 1141169784Sgrog product(bool, AdjustConcurrency, false, \ 1142169784Sgrog "call thr_setconcurrency at thread create time to avoid " \ 1143169784Sgrog "LWP starvation on MP systems (For Solaris Only)") \ 1144169784Sgrog \ 1145169784Sgrog develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 1146169784Sgrog "Should the system attempt to update the compiler file when " \ 1147169784Sgrog "an error occurs?") \ 1148169784Sgrog \ 1149169784Sgrog product(bool, ReduceSignalUsage, false, \ 1150169784Sgrog "Reduce the use of OS signals in Java and/or the VM") \ 1151169784Sgrog \ 1152169784Sgrog notproduct(bool, ValidateMarkSweep, false, \ 1153169784Sgrog "Do extra validation during MarkSweep collection") \ 1154169784Sgrog \ 1155169784Sgrog notproduct(bool, RecordMarkSweepCompaction, false, \ 1156169784Sgrog "Enable GC-to-GC recording and querying of compaction during " \ 1157169784Sgrog "MarkSweep") \ 1158169784Sgrog \ 1159169784Sgrog develop_pd(bool, ShareVtableStubs, \ 1160169784Sgrog "Share vtable stubs (smaller code but worse branch prediction") \ 1161169784Sgrog \ 1162131994Scperciva develop(bool, LoadLineNumberTables, true, \ 1163131994Scperciva "Tells whether the class file parser loads line number tables") \ 1164169784Sgrog \ 1165169784Sgrog develop(bool, LoadLocalVariableTables, true, \ 1166169784Sgrog "Tells whether the class file parser loads local variable tables")\ 1167169784Sgrog \ 11687685Sache develop(bool, LoadLocalVariableTypeTables, true, \ 11697685Sache "Tells whether the class file parser loads local variable type tables")\ 1170169784Sgrog \ 1171169784Sgrog product(bool, AllowUserSignalHandlers, false, \ 1172131994Scperciva "Do not complain if the application installs signal handlers " \ 1173131994Scperciva "(Solaris & Linux only)") \ 1174169784Sgrog \ 1175169784Sgrog product(bool, UseSignalChaining, true, \ 1176169784Sgrog "Use signal-chaining to invoke signal handlers installed " \ 1177169784Sgrog "by the application (Solaris & Linux only)") \ 1178169784Sgrog \ 1179169784Sgrog product(bool, UseAltSigs, false, \ 1180169784Sgrog "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1181169784Sgrog "internal signals (Solaris only)") \ 1182169784Sgrog \ 1183169784Sgrog product(bool, UseSpinning, false, \ 1184169784Sgrog "Use spinning in monitor inflation and before entry") \ 1185169784Sgrog \ 1186169784Sgrog product(bool, PreSpinYield, false, \ 1187169784Sgrog "Yield before inner spinning loop") \ 1188169784Sgrog \ 1189169784Sgrog product(bool, PostSpinYield, true, \ 1190169784Sgrog "Yield after inner spinning loop") \ 1191169784Sgrog \ 1192169784Sgrog product(bool, AllowJNIEnvProxy, false, \ 1193169784Sgrog "Allow JNIEnv proxies for jdbx") \ 1194169784Sgrog \ 1195169784Sgrog product(bool, JNIDetachReleasesMonitors, true, \ 1196169784Sgrog "JNI DetachCurrentThread releases monitors owned by thread") \ 1197169784Sgrog \ 1198169784Sgrog product(bool, RestoreMXCSROnJNICalls, false, \ 1199169784Sgrog "Restore MXCSR when returning from JNI calls") \ 1200169784Sgrog \ 1201169784Sgrog product(bool, CheckJNICalls, false, \ 1202169784Sgrog "Verify all arguments to JNI calls") \ 1203169784Sgrog \ 1204169784Sgrog product(bool, UseFastJNIAccessors, true, \ 1205169784Sgrog "Use optimized versions of Get<Primitive>Field") \ 1206169784Sgrog \ 1207169784Sgrog product(bool, EagerXrunInit, false, \ 1208131994Scperciva "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1209131994Scperciva " but not all -Xrun libraries may support the state of the VM at this time") \ 1210169784Sgrog \ 1211169784Sgrog product(bool, PreserveAllAnnotations, false, \ 1212169784Sgrog "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1213169784Sgrog \ 1214169784Sgrog develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1215169784Sgrog "Number of OutOfMemoryErrors preallocated with backtrace") \ 1216169784Sgrog \ 1217169784Sgrog product(bool, LazyBootClassLoader, true, \ 1218169784Sgrog "Enable/disable lazy opening of boot class path entries") \ 1219169784Sgrog \ 1220169784Sgrog diagnostic(bool, UseIncDec, true, \ 1221169784Sgrog "Use INC, DEC instructions on x86") \ 1222169784Sgrog \ 1223169784Sgrog product(bool, UseNewLongLShift, false, \ 1224169784Sgrog "Use optimized bitwise shift left") \ 1225169784Sgrog \ 1226169784Sgrog product(bool, UseStoreImmI16, true, \ 1227169784Sgrog "Use store immediate 16-bits value instruction on x86") \ 1228169784Sgrog \ 1229169784Sgrog product(bool, UseAddressNop, false, \ 123091141Scjc "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 123191141Scjc \ 12327685Sache product(bool, UseXmmLoadAndClearUpper, true, \ 12337685Sache "Load low part of XMM register and clear upper part") \ 12347685Sache \ 12357685Sache product(bool, UseXmmRegToRegMoveAll, false, \ 1236169784Sgrog "Copy all XMM register bits when moving value between registers") \ 1237169784Sgrog \ 1238169784Sgrog product(bool, UseXmmI2D, false, \ 1239169784Sgrog "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 1240169784Sgrog \ 1241169784Sgrog product(bool, UseXmmI2F, false, \ 1242169784Sgrog "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 1243169784Sgrog \ 1244169784Sgrog product(bool, UseXMMForArrayCopy, false, \ 1245169784Sgrog "Use SSE2 MOVQ instruction for Arraycopy") \ 1246169784Sgrog \ 1247169784Sgrog product(bool, UseUnalignedLoadStores, false, \ 1248169784Sgrog "Use SSE2 MOVDQU instruction for Arraycopy") \ 1249169784Sgrog \ 125065465Ssheldonh product(bool, UseCBCond, false, \ 125165465Ssheldonh "Use compare and branch instruction on SPARC") \ 1252169784Sgrog \ 1253169784Sgrog product(intx, FieldsAllocationStyle, 1, \ 1254169784Sgrog "0 - type based with oops first, 1 - with oops last, " \ 1255169784Sgrog "2 - oops in super and sub classes are together") \ 1256208060Sdougb \ 1257208060Sdougb product(bool, CompactFields, true, \ 1258169784Sgrog "Allocate nonstatic fields in gaps between previous fields") \ 1259169784Sgrog \ 1260169784Sgrog notproduct(bool, PrintCompactFieldsSavings, false, \ 1261169784Sgrog "Print how many words were saved with CompactFields") \ 1262169784Sgrog \ 1263169784Sgrog product(bool, UseBiasedLocking, true, \ 1264169784Sgrog "Enable biased locking in JVM") \ 1265169784Sgrog \ 1266169784Sgrog product(intx, BiasedLockingStartupDelay, 4000, \ 1267169784Sgrog "Number of milliseconds to wait before enabling biased locking") \ 1268208060Sdougb \ 1269208060Sdougb diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1270169784Sgrog "Print statistics of biased locking in JVM") \ 1271169784Sgrog \ 1272169784Sgrog product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1273169784Sgrog "Threshold of number of revocations per type to try to " \ 1274169784Sgrog "rebias all objects in the heap of that type") \ 1275169784Sgrog \ 1276169784Sgrog product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1277169784Sgrog "Threshold of number of revocations per type to permanently " \ 1278169784Sgrog "revoke biases of all objects in the heap of that type") \ 1279169784Sgrog \ 1280169784Sgrog product(intx, BiasedLockingDecayTime, 25000, \ 1281169784Sgrog "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1282169784Sgrog "type after previous bulk rebias") \ 1283169784Sgrog \ 1284169784Sgrog develop(bool, JavaObjectsInPerm, false, \ 1285169784Sgrog "controls whether Classes and interned Strings are allocated" \ 1286169784Sgrog "in perm. This purely intended to allow debugging issues" \ 1287169784Sgrog "in production.") \ 1288169784Sgrog \ 1289169784Sgrog /* tracing */ \ 1290169784Sgrog \ 1291169784Sgrog notproduct(bool, TraceRuntimeCalls, false, \ 1292169784Sgrog "Trace run-time calls") \ 1293169784Sgrog \ 1294169784Sgrog develop(bool, TraceJNICalls, false, \ 1295169784Sgrog "Trace JNI calls") \ 1296169784Sgrog \ 1297169784Sgrog notproduct(bool, TraceJVMCalls, false, \ 1298169784Sgrog "Trace JVM calls") \ 1299169784Sgrog \ 1300169784Sgrog product(ccstr, TraceJVMTI, NULL, \ 1301169784Sgrog "Trace flags for JVMTI functions and events") \ 1302169784Sgrog \ 1303169784Sgrog /* This option can change an EMCP method into an obsolete method. */ \ 1304169784Sgrog /* This can affect tests that except specific methods to be EMCP. */ \ 1305169784Sgrog /* This option should be used with caution. */ \ 1306169784Sgrog product(bool, StressLdcRewrite, false, \ 1307169784Sgrog "Force ldc -> ldc_w rewrite during RedefineClasses") \ 13087685Sache \ 13097685Sache product(intx, TraceRedefineClasses, 0, \ 1310169784Sgrog "Trace level for JVMTI RedefineClasses") \ 1311169784Sgrog \ 1312169784Sgrog develop(bool, StressMethodComparator, false, \ 1313169784Sgrog "run the MethodComparator on all loaded methods") \ 1314169784Sgrog \ 1315169784Sgrog /* change to false by default sometime after Mustang */ \ 13167685Sache product(bool, VerifyMergedCPBytecodes, true, \ 13177685Sache "Verify bytecodes after RedefineClasses constant pool merging") \ 1318169784Sgrog \ 1319169784Sgrog develop(bool, TraceJNIHandleAllocation, false, \ 1320169784Sgrog "Trace allocation/deallocation of JNI handle blocks") \ 1321169784Sgrog \ 1322169784Sgrog develop(bool, TraceThreadEvents, false, \ 1323169784Sgrog "Trace all thread events") \ 1324208060Sdougb \ 1325208060Sdougb develop(bool, TraceBytecodes, false, \ 1326169784Sgrog "Trace bytecode execution") \ 1327169784Sgrog \ 1328169784Sgrog develop(bool, TraceClassInitialization, false, \ 1329169784Sgrog "Trace class initialization") \ 13307685Sache \ 13317685Sache develop(bool, TraceExceptions, false, \ 13327685Sache "Trace exceptions") \ 13337685Sache \ 13347685Sache develop(bool, TraceICs, false, \ 13357685Sache "Trace inline cache changes") \ 13367685Sache \ 13377685Sache notproduct(bool, TraceInvocationCounterOverflow, false, \ 13387685Sache "Trace method invocation counter overflow") \ 13397685Sache \ 13407685Sache develop(bool, TraceInlineCacheClearing, false, \ 13417685Sache "Trace clearing of inline caches in nmethods") \ 13427685Sache \ 13437685Sache develop(bool, TraceDependencies, false, \ 13447685Sache "Trace dependencies") \ 13457685Sache \ 1346131994Scperciva develop(bool, VerifyDependencies, trueInDebug, \ 1347131994Scperciva "Exercise and verify the compilation dependency mechanism") \ 1348131994Scperciva \ 1349131994Scperciva develop(bool, TraceNewOopMapGeneration, false, \ 13507685Sache "Trace OopMapGeneration") \ 135129928Smarkm \ 135229928Smarkm develop(bool, TraceNewOopMapGenerationDetailed, false, \ 13537685Sache "Trace OopMapGeneration: print detailed cell states") \ 135491141Scjc \ 135591141Scjc develop(bool, TimeOopMap, false, \ 13567685Sache "Time calls to GenerateOopMap::compute_map() in sum") \ 13577685Sache \ 13587685Sache develop(bool, TimeOopMap2, false, \ 13597685Sache "Time calls to GenerateOopMap::compute_map() individually") \ 13607685Sache \ 13617685Sache develop(bool, TraceMonitorMismatch, false, \ 13627685Sache "Trace monitor matching failures during OopMapGeneration") \ 13637685Sache \ 1364131994Scperciva develop(bool, TraceOopMapRewrites, false, \ 13659882Sache "Trace rewritting of method oops during oop map generation") \ 1366131994Scperciva \ 13679882Sache develop(bool, TraceSafepoint, false, \ 1368131994Scperciva "Trace safepoint operations") \ 13697685Sache \ 13707685Sache develop(bool, TraceICBuffer, false, \ 13717685Sache "Trace usage of IC buffer") \ 13727685Sache \ 1373131994Scperciva develop(bool, TraceCompiledIC, false, \ 13747685Sache "Trace changes of compiled IC") \ 13757685Sache \ 13767685Sache notproduct(bool, TraceZapDeadLocals, false, \ 13777685Sache "Trace zapping dead locals") \ 1378131994Scperciva \ 13797685Sache develop(bool, TraceStartupTime, false, \ 13807685Sache "Trace setup time") \ 13817685Sache \ 13827685Sache product(ccstr, HPILibPath, NULL, \ 13837685Sache "Specify alternate path to HPI library") \ 13847685Sache \ 13857685Sache develop(bool, TraceProtectionDomainVerification, false, \ 13867685Sache "Trace protection domain verifcation") \ 13877685Sache \ 13887685Sache develop(bool, TraceClearedExceptions, false, \ 13897685Sache "Prints when an exception is forcibly cleared") \ 1390705Swollman \ 13917685Sache product(bool, TraceClassResolution, false, \ 13927685Sache "Trace all constant pool resolutions (for debugging)") \ 13937685Sache \ 13947685Sache product(bool, TraceBiasedLocking, false, \ 13957685Sache "Trace biased locking in JVM") \ 13967685Sache \ 13977685Sache product(bool, TraceMonitorInflation, false, \ 13987685Sache "Trace monitor inflation in JVM") \ 13997685Sache \ 14007685Sache /* assembler */ \ 14017685Sache product(bool, Use486InstrsOnly, false, \ 14027685Sache "Use 80486 Compliant instruction subset") \ 14037685Sache \ 14047685Sache /* gc */ \ 14057685Sache \ 14067685Sache product(bool, UseSerialGC, false, \ 14077685Sache "Use the serial garbage collector") \ 14087685Sache \ 1409169784Sgrog product(bool, UseG1GC, false, \ 1410169784Sgrog "Use the Garbage-First garbage collector") \ 14117685Sache \ 14127685Sache product(bool, UseParallelGC, false, \ 141391141Scjc "Use the Parallel Scavenge garbage collector") \ 141491141Scjc \ 14157685Sache product(bool, UseParallelOldGC, false, \ 14167685Sache "Use the Parallel Old garbage collector") \ 1417169784Sgrog \ 1418169784Sgrog product(uintx, HeapMaximumCompactionInterval, 20, \ 1419169784Sgrog "How often should we maximally compact the heap (not allowing " \ 1420169784Sgrog "any dead space)") \ 1421169784Sgrog \ 1422169784Sgrog product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1423169784Sgrog "The collection count for the first maximum compaction") \ 1424169784Sgrog \ 1425208060Sdougb product(bool, UseMaximumCompactionOnSystemGC, true, \ 1426169784Sgrog "In the Parallel Old garbage collector maximum compaction for " \ 1427169784Sgrog "a system GC") \ 1428169784Sgrog \ 1429169784Sgrog product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1430169784Sgrog "The mean used by the par compact dead wood" \ 1431169784Sgrog "limiter (a number between 0-100).") \ 1432169784Sgrog \ 1433169784Sgrog product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1434169784Sgrog "The standard deviation used by the par compact dead wood" \ 1435169784Sgrog "limiter (a number between 0-100).") \ 1436169784Sgrog \ 1437169784Sgrog product(uintx, ParallelGCThreads, 0, \ 1438169784Sgrog "Number of parallel threads parallel gc will use") \ 1439131994Scperciva \ 144080266Sdougb product(bool, UseDynamicNumberOfGCThreads, false, \ 144180266Sdougb "Dynamically choose the number of parallel threads " \ 1442169784Sgrog "parallel gc will use") \ 1443169784Sgrog \ 1444169784Sgrog diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1445169784Sgrog "Force dynamic selection of the number of" \ 14467685Sache "parallel threads parallel gc will use to aid debugging") \ 14477685Sache \ 1448169784Sgrog product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1449169784Sgrog "Size of heap (bytes) per GC thread used in calculating the " \ 1450131994Scperciva "number of GC threads") \ 1451169784Sgrog \ 1452169784Sgrog product(bool, TraceDynamicGCThreads, false, \ 1453169784Sgrog "Trace the dynamic GC thread usage") \ 1454169784Sgrog \ 1455169784Sgrog develop(bool, ParallelOldGCSplitALot, false, \ 1456169784Sgrog "Provoke splitting (copying data from a young gen space to" \ 1457208060Sdougb "multiple destination spaces)") \ 1458169784Sgrog \ 1459169784Sgrog develop(uintx, ParallelOldGCSplitInterval, 3, \ 1460169784Sgrog "How often to provoke splitting a young gen space") \ 1461169784Sgrog \ 1462169784Sgrog develop(bool, TraceRegionTasksQueuing, false, \ 1463169784Sgrog "Trace the queuing of the region tasks") \ 1464208060Sdougb \ 1465131994Scperciva product(uintx, ConcGCThreads, 0, \ 1466131994Scperciva "Number of threads concurrent gc will use") \ 146780266Sdougb \ 1468131994Scperciva product(uintx, YoungPLABSize, 4096, \ 146980266Sdougb "Size of young gen promotion labs (in HeapWords)") \ 1470169784Sgrog \ 1471169784Sgrog product(uintx, OldPLABSize, 1024, \ 1472131994Scperciva "Size of old gen promotion labs (in HeapWords)") \ 147380266Sdougb \ 1474131994Scperciva product(uintx, GCTaskTimeStampEntries, 200, \ 147580266Sdougb "Number of time stamp entries per gc worker thread") \ 1476131994Scperciva \ 147780266Sdougb product(bool, AlwaysTenure, false, \ 1478131994Scperciva "Always tenure objects in eden. (ParallelGC only)") \ 1479131994Scperciva \ 14807685Sache product(bool, NeverTenure, false, \ 14817685Sache "Never tenure objects in eden, May tenure on overflow " \ 14827685Sache "(ParallelGC only)") \ 14837685Sache \ 14847685Sache product(bool, ScavengeBeforeFullGC, true, \ 14857685Sache "Scavenge youngest generation before each full GC, " \ 14867685Sache "used with UseParallelGC") \ 1487131994Scperciva \ 14887685Sache develop(bool, ScavengeWithObjectsInToSpace, false, \ 14897685Sache "Allow scavenges to occur when to_space contains objects.") \ 1490120910Sbms \ 1491120910Sbms product(bool, UseConcMarkSweepGC, false, \ 1492169784Sgrog "Use Concurrent Mark-Sweep GC in the old generation") \ 1493169784Sgrog \ 1494169784Sgrog product(bool, ExplicitGCInvokesConcurrent, false, \ 1495169784Sgrog "A System.gc() request invokes a concurrent collection;" \ 1496169784Sgrog " (effective only when UseConcMarkSweepGC)") \ 1497169784Sgrog \ 1498705Swollman product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 14997685Sache "A System.gc() request invokes a concurrent collection and " \ 1500705Swollman "also unloads classes during such a concurrent gc cycle " \ 15017685Sache "(effective only when UseConcMarkSweepGC)") \ 15027685Sache \ 15037685Sache product(bool, GCLockerInvokesConcurrent, false, \ 15047685Sache "The exit of a JNI CS necessitating a scavenge also" \ 15057685Sache " kicks off a bkgrd concurrent collection") \ 15067685Sache \ 15077685Sache product(uintx, GCLockerEdenExpansionPercent, 5, \ 15087685Sache "How much the GC can expand the eden by while the GC locker " \ 15097685Sache "is active (as a percentage)") \ 15107685Sache \ 15117685Sache develop(bool, UseCMSAdaptiveFreeLists, true, \ 15127685Sache "Use Adaptive Free Lists in the CMS generation") \ 151391141Scjc \ 151491141Scjc develop(bool, UseAsyncConcMarkSweepGC, true, \ 151591141Scjc "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 151691141Scjc \ 15177685Sache develop(bool, RotateCMSCollectionTypes, false, \ 15187685Sache "Rotate the CMS collections among concurrent and STW") \ 15197685Sache \ 15207685Sache product(bool, UseCMSBestFit, true, \ 15217685Sache "Use CMS best fit allocation strategy") \ 15227685Sache \ 1523108008Seric product(bool, UseCMSCollectionPassing, true, \ 1524108008Seric "Use passing of collection from background to foreground") \ 152580662Sdougb \ 152680662Sdougb product(bool, UseParNewGC, false, \ 15277685Sache "Use parallel threads in the new generation.") \ 15287685Sache \ 1529131994Scperciva product(bool, ParallelGCVerbose, false, \ 153091141Scjc "Verbose output for parallel GC.") \ 153191141Scjc \ 1532215249Stuexen product(intx, ParallelGCBufferWastePct, 10, \ 1533215249Stuexen "wasted fraction of parallel allocation buffer.") \ 1534215249Stuexen \ 153517771Sasami diagnostic(bool, ParallelGCRetainPLAB, false, \ 1536197728Srpaulo "Retain parallel allocation buffers across scavenges; " \ 1537197728Srpaulo " -- disabled because this currently conflicts with " \ 15387685Sache " parallel card scanning under certain conditions ") \ 15397685Sache \ 154091141Scjc product(intx, TargetPLABWastePct, 10, \ 154191141Scjc "target wasted space in last buffer as pct of overall allocation")\ 15427685Sache \ 15437685Sache product(uintx, PLABWeight, 75, \ 154466668Ssheldonh "Percentage (0-100) used to weight the current sample when" \ 154566668Ssheldonh "computing exponentially decaying average for ResizePLAB.") \ 154691141Scjc \ 154791141Scjc product(bool, ResizePLAB, true, \ 15487685Sache "Dynamically resize (survivor space) promotion labs") \ 15497685Sache \ 15507685Sache product(bool, PrintPLAB, false, \ 15517685Sache "Print (survivor space) promotion labs sizing decisions") \ 155291141Scjc \ 155391141Scjc product(intx, ParGCArrayScanChunk, 50, \ 155491141Scjc "Scan a subset and push remainder, if array is bigger than this") \ 155591141Scjc \ 155691141Scjc product(bool, ParGCUseLocalOverflow, false, \ 155791141Scjc "Instead of a global overflow list, use local overflow stacks") \ 155891141Scjc \ 155991141Scjc product(bool, ParGCTrimOverflow, true, \ 156091141Scjc "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 156191141Scjc \ 156291141Scjc notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 156391141Scjc "Whether we should simulate work queue overflow in ParNew") \ 15647685Sache \ 15657685Sache notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 156691141Scjc "An `interval' counter that determines how frequently " \ 156791141Scjc "we simulate overflow; a smaller number increases frequency") \ 156891141Scjc \ 156991141Scjc product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 15707685Sache "The desired number of objects to claim from the overflow list") \ 15717685Sache \ 15727685Sache diagnostic(uintx, ParGCStridesPerThread, 2, \ 15737685Sache "The number of strides per worker thread that we divide up the " \ 15747685Sache "card table scanning work into") \ 15757685Sache \ 15767685Sache diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 15777685Sache "The number of cards in each chunk of the parallel chunks used " \ 15787685Sache "during card table scanning") \ 15797685Sache \ 15807685Sache product(uintx, CMSParPromoteBlocksToClaim, 16, \ 15817685Sache "Number of blocks to attempt to claim when refilling CMS LAB for "\ 158291141Scjc "parallel GC.") \ 158391141Scjc \ 15847685Sache product(uintx, OldPLABWeight, 50, \ 15857685Sache "Percentage (0-100) used to weight the current sample when" \ 15867685Sache "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 15877685Sache \ 15887685Sache product(bool, ResizeOldPLAB, true, \ 15897685Sache "Dynamically resize (old gen) promotion labs") \ 15907685Sache \ 15917685Sache product(bool, PrintOldPLAB, false, \ 159291141Scjc "Print (old gen) promotion labs sizing decisions") \ 159391141Scjc \ 159491141Scjc product(uintx, CMSOldPLABMin, 16, \ 159591141Scjc "Min size of CMS gen promotion lab caches per worker per blksize")\ 159691141Scjc \ 159791141Scjc product(uintx, CMSOldPLABMax, 1024, \ 159891141Scjc "Max size of CMS gen promotion lab caches per worker per blksize")\ 159991141Scjc \ 16007685Sache product(uintx, CMSOldPLABNumRefills, 4, \ 16017685Sache "Nominal number of refills of CMS gen promotion lab cache" \ 160291141Scjc " per worker per block size") \ 160391141Scjc \ 16047685Sache product(bool, CMSOldPLABResizeQuicker, false, \ 16057685Sache "Whether to react on-the-fly during a scavenge to a sudden" \ 160691141Scjc " change in block demand rate") \ 160791141Scjc \ 160891141Scjc product(uintx, CMSOldPLABToleranceFactor, 4, \ 160991141Scjc "The tolerance of the phase-change detector for on-the-fly" \ 161091141Scjc " PLAB resizing during a scavenge") \ 161191141Scjc \ 161291141Scjc product(uintx, CMSOldPLABReactivityFactor, 2, \ 161391141Scjc "The gain in the feedback loop for on-the-fly PLAB resizing" \ 161491141Scjc " during a scavenge") \ 161591141Scjc \ 161691141Scjc product(uintx, CMSOldPLABReactivityCeiling, 10, \ 161791141Scjc "The clamping of the gain in the feedback loop for on-the-fly" \ 161891141Scjc " PLAB resizing during a scavenge") \ 161991141Scjc \ 16207685Sache product(bool, AlwaysPreTouch, false, \ 16217685Sache "It forces all freshly committed pages to be pre-touched.") \ 162291141Scjc \ 162391141Scjc product_pd(intx, CMSYoungGenPerWorker, \ 16247685Sache "The maximum size of young gen chosen by default per GC worker " \ 16257685Sache "thread available") \ 162691141Scjc \ 162791141Scjc product(bool, GCOverheadReporting, false, \ 162891141Scjc "Enables the GC overhead reporting facility") \ 162991141Scjc \ 16307685Sache product(intx, GCOverheadReportingPeriodMS, 100, \ 16317685Sache "Reporting period for conc GC overhead reporting, in ms ") \ 163291141Scjc \ 163391141Scjc product(bool, CMSIncrementalMode, false, \ 163491141Scjc "Whether CMS GC should operate in \"incremental\" mode") \ 163591141Scjc \ 163691141Scjc product(uintx, CMSIncrementalDutyCycle, 10, \ 163791141Scjc "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 163891141Scjc "CMSIncrementalPacing is enabled, then this is just the initial" \ 163991141Scjc "value") \ 164091141Scjc \ 164191141Scjc product(bool, CMSIncrementalPacing, true, \ 164291141Scjc "Whether the CMS incremental mode duty cycle should be " \ 164391141Scjc "automatically adjusted") \ 164491141Scjc \ 164591141Scjc product(uintx, CMSIncrementalDutyCycleMin, 0, \ 164691141Scjc "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 164791141Scjc "enabled (a percentage, 0-100)") \ 164891141Scjc \ 164991141Scjc product(uintx, CMSIncrementalSafetyFactor, 10, \ 165091141Scjc "Percentage (0-100) used to add conservatism when computing the " \ 165191141Scjc "duty cycle") \ 165291141Scjc \ 165391141Scjc product(uintx, CMSIncrementalOffset, 0, \ 165491141Scjc "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 165591141Scjc " is shifted to the right within the period between young GCs") \ 165691141Scjc \ 165791141Scjc product(uintx, CMSExpAvgFactor, 50, \ 16587685Sache "Percentage (0-100) used to weight the current sample when" \ 16597685Sache "computing exponential averages for CMS statistics.") \ 16607685Sache \ 16617685Sache product(uintx, CMS_FLSWeight, 75, \ 16627685Sache "Percentage (0-100) used to weight the current sample when" \ 16637685Sache "computing exponentially decating averages for CMS FLS statistics.") \ 16647685Sache \ 16657685Sache product(uintx, CMS_FLSPadding, 1, \ 16667685Sache "The multiple of deviation from mean to use for buffering" \ 16677685Sache "against volatility in free list demand.") \ 166891141Scjc \ 166991141Scjc product(uintx, FLSCoalescePolicy, 2, \ 167091141Scjc "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 167191141Scjc \ 167291141Scjc product(bool, FLSAlwaysCoalesceLarge, false, \ 167391141Scjc "CMS: Larger free blocks are always available for coalescing") \ 167491141Scjc \ 167591141Scjc product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 167691141Scjc "CMS: the smaller the percentage the greater the coalition force")\ 167791141Scjc \ 16787685Sache product(double, CMSSmallCoalSurplusPercent, 1.05, \ 16797685Sache "CMS: the factor by which to inflate estimated demand of small" \ 16807685Sache " block sizes to prevent coalescing with an adjoining block") \ 16817685Sache \ 168291141Scjc product(double, CMSLargeCoalSurplusPercent, 0.95, \ 168391141Scjc "CMS: the factor by which to inflate estimated demand of large" \ 16847685Sache " block sizes to prevent coalescing with an adjoining block") \ 16857685Sache \ 168691141Scjc product(double, CMSSmallSplitSurplusPercent, 1.10, \ 168791141Scjc "CMS: the factor by which to inflate estimated demand of small" \ 168891141Scjc " block sizes to prevent splitting to supply demand for smaller" \ 168991141Scjc " blocks") \ 169091141Scjc \ 169191141Scjc product(double, CMSLargeSplitSurplusPercent, 1.00, \ 169291141Scjc "CMS: the factor by which to inflate estimated demand of large" \ 169391141Scjc " block sizes to prevent splitting to supply demand for smaller" \ 169491141Scjc " blocks") \ 169591141Scjc \ 16967685Sache product(bool, CMSExtrapolateSweep, false, \ 16977685Sache "CMS: cushion for block demand during sweep") \ 169891141Scjc \ 169991141Scjc product(uintx, CMS_SweepWeight, 75, \ 170091141Scjc "Percentage (0-100) used to weight the current sample when " \ 170191141Scjc "computing exponentially decaying average for inter-sweep " \ 170291141Scjc "duration") \ 170391141Scjc \ 170491141Scjc product(uintx, CMS_SweepPadding, 1, \ 170591141Scjc "The multiple of deviation from mean to use for buffering " \ 17067685Sache "against volatility in inter-sweep duration.") \ 17077685Sache \ 170891141Scjc product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 170991141Scjc "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 17107685Sache "duration exceeds this threhold in milliseconds") \ 17117685Sache \ 171291141Scjc develop(bool, CMSTraceIncrementalMode, false, \ 171391141Scjc "Trace CMS incremental mode") \ 171491141Scjc \ 171591141Scjc develop(bool, CMSTraceIncrementalPacing, false, \ 17167685Sache "Trace CMS incremental mode pacing computation") \ 17177685Sache \ 171891141Scjc develop(bool, CMSTraceThreadState, false, \ 171991141Scjc "Trace the CMS thread state (enable the trace_state() method)") \ 172091141Scjc \ 172191141Scjc product(bool, CMSClassUnloadingEnabled, false, \ 17227685Sache "Whether class unloading enabled when using CMS GC") \ 172391141Scjc \ 17247685Sache product(uintx, CMSClassUnloadingMaxInterval, 0, \ 17257685Sache "When CMS class unloading is enabled, the maximum CMS cycle count"\ 17267685Sache " for which classes may not be unloaded") \ 17277685Sache \ 17287685Sache product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 17297685Sache "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 173091141Scjc \ 173191141Scjc product(bool, UseCMSCompactAtFullCollection, true, \ 173291141Scjc "Use mark sweep compact at full collections") \ 173391141Scjc \ 173491141Scjc product(uintx, CMSFullGCsBeforeCompaction, 0, \ 173591141Scjc "Number of CMS full collection done before compaction if > 0") \ 173691141Scjc \ 173791141Scjc develop(intx, CMSDictionaryChoice, 0, \ 173891141Scjc "Use BinaryTreeDictionary as default in the CMS generation") \ 173991141Scjc \ 174091141Scjc product(uintx, CMSIndexedFreeListReplenish, 4, \ 174191141Scjc "Replenish an indexed free list with this number of chunks") \ 174291141Scjc \ 174391141Scjc product(bool, CMSReplenishIntermediate, true, \ 174491141Scjc "Replenish all intermediate free-list caches") \ 174591141Scjc \ 17467685Sache product(bool, CMSSplitIndexedFreeListBlocks, true, \ 17477685Sache "When satisfying batched demand, split blocks from the " \ 17487685Sache "IndexedFreeList whose size is a multiple of requested size") \ 17497685Sache \ 17507685Sache product(bool, CMSLoopWarn, false, \ 17517685Sache "Warn in case of excessive CMS looping") \ 17527685Sache \ 17537685Sache develop(bool, CMSOverflowEarlyRestoration, false, \ 175491141Scjc "Whether preserved marks should be restored early") \ 175591141Scjc \ 17567685Sache product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 17577685Sache "Size of marking stack") \ 175891141Scjc \ 175991141Scjc product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 176091141Scjc "Max size of marking stack") \ 176191141Scjc \ 176291141Scjc notproduct(bool, CMSMarkStackOverflowALot, false, \ 176391141Scjc "Whether we should simulate frequent marking stack / work queue" \ 176491141Scjc " overflow") \ 176591141Scjc \ 17667685Sache notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 17677685Sache "An `interval' counter that determines how frequently" \ 1768131994Scperciva " we simulate overflow; a smaller number increases frequency") \ 1769131994Scperciva \ 1770131994Scperciva product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1771131994Scperciva "(Temporary, subject to experimentation)" \ 1772131994Scperciva "Maximum number of abortable preclean iterations, if > 0") \ 1773131994Scperciva \ 1774131994Scperciva product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1775131994Scperciva "(Temporary, subject to experimentation)" \ 1776131994Scperciva "Maximum time in abortable preclean in ms") \ 1777131994Scperciva \ 1778131994Scperciva product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1779131994Scperciva "(Temporary, subject to experimentation)" \ 17807685Sache "Nominal minimum work per abortable preclean iteration") \ 17817685Sache \ 1782131994Scperciva manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1783131994Scperciva "(Temporary, subject to experimentation)" \ 1784131994Scperciva " Time that we sleep between iterations when not given" \ 1785131994Scperciva " enough work per iteration") \ 1786131994Scperciva \ 1787131994Scperciva product(uintx, CMSRescanMultiple, 32, \ 17887685Sache "Size (in cards) of CMS parallel rescan task") \ 17897685Sache \ 17907685Sache product(uintx, CMSConcMarkMultiple, 32, \ 17917685Sache "Size (in cards) of CMS concurrent MT marking task") \ 1792131994Scperciva \ 1793131994Scperciva product(uintx, CMSRevisitStackSize, 1*M, \ 1794131994Scperciva "Size of CMS KlassKlass revisit stack") \ 1795131994Scperciva \ 17967685Sache product(bool, CMSAbortSemantics, false, \ 17977685Sache "Whether abort-on-overflow semantics is implemented") \ 17987685Sache \ 17997685Sache product(bool, CMSParallelRemarkEnabled, true, \ 18007685Sache "Whether parallel remark enabled (only if ParNewGC)") \ 18017685Sache \ 18027685Sache product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 18037685Sache "Whether parallel remark of survivor space" \ 1804131994Scperciva " enabled (effective only if CMSParallelRemarkEnabled)") \ 1805131994Scperciva \ 18067685Sache product(bool, CMSPLABRecordAlways, true, \ 18077685Sache "Whether to always record survivor space PLAB bdries" \ 18087685Sache " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 18097685Sache \ 18107685Sache product(bool, CMSConcurrentMTEnabled, true, \ 18117685Sache "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 18127685Sache \ 18137685Sache product(bool, CMSPermGenPrecleaningEnabled, true, \ 18147685Sache "Whether concurrent precleaning enabled in perm gen" \ 18157685Sache " (effective only when CMSPrecleaningEnabled is true)") \ 18167685Sache \ 18177685Sache product(bool, CMSPrecleaningEnabled, true, \ 1818131994Scperciva "Whether concurrent precleaning enabled") \ 1819131994Scperciva \ 1820131994Scperciva product(uintx, CMSPrecleanIter, 3, \ 1821131994Scperciva "Maximum number of precleaning iteration passes") \ 1822131994Scperciva \ 1823131994Scperciva product(uintx, CMSPrecleanNumerator, 2, \ 18247685Sache "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 18257685Sache " ratio") \ 18267685Sache \ 18277685Sache product(uintx, CMSPrecleanDenominator, 3, \ 18287685Sache "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 18297685Sache " ratio") \ 18307685Sache \ 18317685Sache product(bool, CMSPrecleanRefLists1, true, \ 18327685Sache "Preclean ref lists during (initial) preclean phase") \ 18337685Sache \ 18347685Sache product(bool, CMSPrecleanRefLists2, false, \ 18357685Sache "Preclean ref lists during abortable preclean phase") \ 18367685Sache \ 18377685Sache product(bool, CMSPrecleanSurvivors1, false, \ 18387685Sache "Preclean survivors during (initial) preclean phase") \ 18397685Sache \ 18407685Sache product(bool, CMSPrecleanSurvivors2, true, \ 18417685Sache "Preclean survivors during abortable preclean phase") \ 18427685Sache \ 18437685Sache product(uintx, CMSPrecleanThreshold, 1000, \ 18447685Sache "Don't re-iterate if #dirty cards less than this") \ 18457685Sache \ 18467685Sache product(bool, CMSCleanOnEnter, true, \ 18477685Sache "Clean-on-enter optimization for reducing number of dirty cards") \ 18487685Sache \ 18497685Sache product(uintx, CMSRemarkVerifyVariant, 1, \ 18507685Sache "Choose variant (1,2) of verification following remark") \ 18517685Sache \ 1852131994Scperciva product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1853131994Scperciva "If Eden used is below this value, don't try to schedule remark") \ 1854131994Scperciva \ 1855131994Scperciva product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1856131994Scperciva "The Eden occupancy % at which to try and schedule remark pause") \ 1857131994Scperciva \ 1858131994Scperciva product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1859131994Scperciva "Start sampling Eden top at least before yg occupancy reaches" \ 1860131994Scperciva " 1/<ratio> of the size at which we plan to schedule remark") \ 1861131994Scperciva \ 1862131994Scperciva product(uintx, CMSSamplingGrain, 16*K, \ 1863131994Scperciva "The minimum distance between eden samples for CMS (see above)") \ 1864131994Scperciva \ 1865131994Scperciva product(bool, CMSScavengeBeforeRemark, false, \ 1866131994Scperciva "Attempt scavenge before the CMS remark step") \ 1867131994Scperciva \ 18687685Sache develop(bool, CMSTraceSweeper, false, \ 18697685Sache "Trace some actions of the CMS sweeper") \ 18707685Sache \ 18717685Sache product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1872131994Scperciva "Don't drain below this size per parallel worker/thief") \ 1873131994Scperciva \ 1874131994Scperciva manageable(intx, CMSWaitDuration, 2000, \ 1875131994Scperciva "Time in milliseconds that CMS thread waits for young GC") \ 18767685Sache \ 18777685Sache product(bool, CMSYield, true, \ 1878131994Scperciva "Yield between steps of concurrent mark & sweep") \ 1879131994Scperciva \ 1880131994Scperciva product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1881131994Scperciva "Bitmap operations should process at most this many bits" \ 1882131994Scperciva "between yields") \ 1883131994Scperciva \ 18847685Sache product(bool, CMSDumpAtPromotionFailure, false, \ 18857685Sache "Dump useful information about the state of the CMS old " \ 1886131994Scperciva " generation upon a promotion failure.") \ 1887131994Scperciva \ 1888131994Scperciva product(bool, CMSPrintChunksInDump, false, \ 1889131994Scperciva "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1890131994Scperciva " more detailed information about the free chunks.") \ 1891131994Scperciva \ 1892131994Scperciva product(bool, CMSPrintObjectsInDump, false, \ 1893131994Scperciva "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1894131994Scperciva " more detailed information about the allocated objects.") \ 1895131994Scperciva \ 1896131994Scperciva diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1897131994Scperciva "Verify that all refs across the FLS boundary " \ 1898131994Scperciva " are to valid objects") \ 1899131994Scperciva \ 19007685Sache diagnostic(bool, FLSVerifyLists, false, \ 19017685Sache "Do lots of (expensive) FreeListSpace verification") \ 1902131994Scperciva \ 1903131994Scperciva diagnostic(bool, FLSVerifyIndexTable, false, \ 1904131994Scperciva "Do lots of (expensive) FLS index table verification") \ 1905131994Scperciva \ 19067685Sache develop(bool, FLSVerifyDictionary, false, \ 1907131994Scperciva "Do lots of (expensive) FLS dictionary verification") \ 1908131994Scperciva \ 19097685Sache develop(bool, VerifyBlockOffsetArray, false, \ 1910131994Scperciva "Do (expensive!) block offset array verification") \ 1911131994Scperciva \ 1912131994Scperciva diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1913131994Scperciva "Maintain _unallocated_block in BlockOffsetArray" \ 19147685Sache " (currently applicable only to CMS collector)") \ 19157685Sache \ 1916131994Scperciva develop(bool, TraceCMSState, false, \ 1917131994Scperciva "Trace the state of the CMS collection") \ 1918131994Scperciva \ 19197685Sache product(intx, RefDiscoveryPolicy, 0, \ 19207685Sache "Whether reference-based(0) or referent-based(1)") \ 19217685Sache \ 19227685Sache product(bool, ParallelRefProcEnabled, false, \ 19237685Sache "Enable parallel reference processing whenever possible") \ 19247685Sache \ 1925131994Scperciva product(bool, ParallelRefProcBalancingEnabled, true, \ 1926131994Scperciva "Enable balancing of reference processing queues") \ 19277685Sache \ 19287685Sache product(intx, CMSTriggerRatio, 80, \ 19297685Sache "Percentage of MinHeapFreeRatio in CMS generation that is " \ 19307685Sache "allocated before a CMS collection cycle commences") \ 19317685Sache \ 19327685Sache product(intx, CMSTriggerPermRatio, 80, \ 19337685Sache "Percentage of MinHeapFreeRatio in the CMS perm generation that " \ 19347685Sache "is allocated before a CMS collection cycle commences, that " \ 19357685Sache "also collects the perm generation") \ 19367685Sache \ 1937131994Scperciva product(uintx, CMSBootstrapOccupancy, 50, \ 1938131994Scperciva "Percentage CMS generation occupancy at which to " \ 19397685Sache "initiate CMS collection for bootstrapping collection stats") \ 19407685Sache \ 19417685Sache product(intx, CMSInitiatingOccupancyFraction, -1, \ 19427685Sache "Percentage CMS generation occupancy to start a CMS collection " \ 19437685Sache "cycle. A negative value means that CMSTriggerRatio is used") \ 19447685Sache \ 19457685Sache product(uintx, InitiatingHeapOccupancyPercent, 45, \ 19467685Sache "Percentage of the (entire) heap occupancy to start a " \ 19477685Sache "concurrent GC cycle. It us used by GCs that trigger a " \ 19487685Sache "concurrent GC cycle based on the occupancy of the entire heap, " \ 19497685Sache "not just one of the generations (e.g., G1). A value of 0 " \ 19507685Sache "denotes 'do constant GC cycles'.") \ 19517685Sache \ 19527685Sache product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 19537685Sache "Percentage CMS perm generation occupancy to start a " \ 19547685Sache "CMScollection cycle. A negative value means that " \ 1955131994Scperciva "CMSTriggerPermRatio is used") \ 1956131994Scperciva \ 1957131994Scperciva product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1958131994Scperciva "Only use occupancy as a crierion for starting a CMS collection") \ 1959131994Scperciva \ 1960131994Scperciva product(intx, CMSIsTooFullPercentage, 98, \ 19617685Sache "An absolute ceiling above which CMS will always consider the " \ 19627685Sache "perm gen ripe for collection") \ 19637685Sache \ 19647685Sache develop(bool, CMSTestInFreeList, false, \ 19657685Sache "Check if the coalesced range is already in the " \ 19667685Sache "free lists as claimed") \ 196748384Sjkh \ 196848384Sjkh notproduct(bool, CMSVerifyReturnedBytes, false, \ 196948384Sjkh "Check that all the garbage collected was returned to the " \ 197048384Sjkh "free lists.") \ 197148384Sjkh \ 197248384Sjkh notproduct(bool, ScavengeALot, false, \ 19737685Sache "Force scavenge at every Nth exit from the runtime system " \ 19747685Sache "(N=ScavengeALotInterval)") \ 19757685Sache \ 19767685Sache develop(bool, FullGCALot, false, \ 19777685Sache "Force full gc at every Nth exit from the runtime system " \ 19787685Sache "(N=FullGCALotInterval)") \ 19797685Sache \ 19807685Sache notproduct(bool, GCALotAtAllSafepoints, false, \ 19817685Sache "Enforce ScavengeALot/GCALot at all potential safepoints") \ 19827685Sache \ 19837685Sache product(bool, PrintPromotionFailure, false, \ 19847685Sache "Print additional diagnostic information following " \ 19857685Sache " promotion failure") \ 19867685Sache \ 19877685Sache notproduct(bool, PromotionFailureALot, false, \ 19887685Sache "Use promotion failure handling on every youngest generation " \ 19897685Sache "collection") \ 19907685Sache \ 19917685Sache develop(uintx, PromotionFailureALotCount, 1000, \ 19927685Sache "Number of promotion failures occurring at ParGCAllocBuffer" \ 19937685Sache "refill attempts (ParNew) or promotion attempts " \ 19947685Sache "(other young collectors) ") \ 19957685Sache \ 19967685Sache develop(uintx, PromotionFailureALotInterval, 5, \ 19977685Sache "Total collections between promotion failures alot") \ 19987685Sache \ 19997685Sache experimental(intx, WorkStealingSleepMillis, 1, \ 20007685Sache "Sleep time when sleep is used for yields") \ 20017685Sache \ 20027685Sache experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2003108661Sschweikh "Number of yields before a sleep is done during workstealing") \ 2004108661Sschweikh \ 2005108661Sschweikh experimental(uintx, WorkStealingHardSpins, 4096, \ 2006108661Sschweikh "Number of iterations in a spin loop between checks on " \ 200733734Sjulian "time out of hard spin") \ 200848384Sjkh \ 200948388Sjkh experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 201048388Sjkh "Ratio of hard spins to calls to yield") \ 20117685Sache \ 20127685Sache product(uintx, PreserveMarkStackSize, 1024, \ 20137685Sache "Size for stack used in promotion failure handling") \ 20147685Sache \ 20157685Sache develop(uintx, ObjArrayMarkingStride, 512, \ 20167685Sache "Number of ObjArray elements to push onto the marking stack" \ 20177685Sache "before pushing a continuation entry") \ 20187685Sache \ 20197685Sache notproduct(bool, ExecuteInternalVMTests, false, \ 20207685Sache "Enable execution of internal VM tests.") \ 20217685Sache \ 20227685Sache product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 20237685Sache \ 20247685Sache product_pd(bool, ResizeTLAB, \ 20257685Sache "Dynamically resize tlab size for threads") \ 20267685Sache \ 20277685Sache product(bool, ZeroTLAB, false, \ 20287685Sache "Zero out the newly created TLAB") \ 20297685Sache \ 20307685Sache product(bool, FastTLABRefill, true, \ 20317685Sache "Use fast TLAB refill code") \ 20327685Sache \ 20337685Sache product(bool, PrintTLAB, false, \ 20347685Sache "Print various TLAB related information") \ 20357685Sache \ 20367685Sache product(bool, TLABStats, true, \ 20377685Sache "Print various TLAB related information") \ 20387685Sache \ 20397685Sache product(bool, UseBlockZeroing, false, \ 20407685Sache "Use special cpu instructions for block zeroing") \ 20417685Sache \ 20427685Sache product(intx, BlockZeroingLowLimit, 2048, \ 20437685Sache "Minimum size in bytes when block zeroing will be used") \ 20447685Sache \ 20457685Sache product(bool, UseBlockCopy, false, \ 20467685Sache "Use special cpu instructions for block copy") \ 20477685Sache \ 20487685Sache product(intx, BlockCopyLowLimit, 2048, \ 20497685Sache "Minimum size in bytes when block copy will be used") \ 20507685Sache \ 20517685Sache product(bool, PrintRevisitStats, false, \ 20527685Sache "Print revisit (klass and MDO) stack related information") \ 2053131994Scperciva \ 20547685Sache EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \ 2055131994Scperciva "Enable LowMemoryProtection")) \ 20567685Sache \ 20577685Sache product_pd(bool, NeverActAsServerClassMachine, \ 20587685Sache "Never act like a server-class machine") \ 2059131994Scperciva \ 20607685Sache product(bool, AlwaysActAsServerClassMachine, false, \ 20617685Sache "Always act like a server-class machine") \ 20627685Sache \ 20637685Sache product_pd(uint64_t, MaxRAM, \ 20647685Sache "Real memory size (in bytes) used to set maximum heap size") \ 20657685Sache \ 20667685Sache product(uintx, ErgoHeapSizeLimit, 0, \ 20677685Sache "Maximum ergonomically set heap size (in bytes); zero means use " \ 2068131994Scperciva "MaxRAM / MaxRAMFraction") \ 20697685Sache \ 20707685Sache product(uintx, MaxRAMFraction, 4, \ 20717685Sache "Maximum fraction (1/n) of real memory used for maximum heap " \ 20727685Sache "size") \ 20737685Sache \ 20747685Sache product(uintx, DefaultMaxRAMFraction, 4, \ 20757685Sache "Maximum fraction (1/n) of real memory used for maximum heap " \ 20767685Sache "size; deprecated: to be renamed to MaxRAMFraction") \ 20777685Sache \ 20787685Sache product(uintx, MinRAMFraction, 2, \ 20797685Sache "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 20807685Sache "size on systems with small physical memory size") \ 20817685Sache \ 20827685Sache product(uintx, InitialRAMFraction, 64, \ 20837685Sache "Fraction (1/n) of real memory used for initial heap size") \ 20847685Sache \ 20857685Sache product(bool, UseAutoGCSelectPolicy, false, \ 20867685Sache "Use automatic collection selection policy") \ 20877685Sache \ 20887685Sache product(uintx, AutoGCSelectPauseMillis, 5000, \ 20897685Sache "Automatic GC selection pause threshhold in ms") \ 20907685Sache \ 20917685Sache product(bool, UseAdaptiveSizePolicy, true, \ 20927685Sache "Use adaptive generation sizing policies") \ 20937685Sache \ 20947685Sache product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 20957685Sache "Use adaptive survivor sizing policies") \ 20967685Sache \ 20977685Sache product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 20987685Sache "Use adaptive young-old sizing policies at minor collections") \ 20997685Sache \ 21007685Sache product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 21017685Sache "Use adaptive young-old sizing policies at major collections") \ 21027685Sache \ 21037685Sache product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 21047685Sache "Use statistics from System.GC for adaptive size policy") \ 21057685Sache \ 21067685Sache product(bool, UseAdaptiveGCBoundary, false, \ 21077685Sache "Allow young-old boundary to move") \ 21087685Sache \ 21097685Sache develop(bool, TraceAdaptiveGCBoundary, false, \ 21107685Sache "Trace young-old boundary moves") \ 21117685Sache \ 21127685Sache develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 21137685Sache "Resize the virtual spaces of the young or old generations") \ 21147685Sache \ 21157685Sache product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 21167685Sache "Policy for changeing generation size for throughput goals") \ 21177685Sache \ 21187685Sache product(uintx, AdaptiveSizePausePolicy, 0, \ 21197685Sache "Policy for changing generation size for pause goals") \ 21207685Sache \ 21217685Sache develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 21227685Sache "Adjust tenured generation to achive a minor pause goal") \ 21237685Sache \ 21247685Sache develop(bool, PSAdjustYoungGenForMajorPause, false, \ 21257685Sache "Adjust young generation to achive a major pause goal") \ 21267685Sache \ 21277685Sache product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 21287685Sache "Number of steps where heuristics is used before data is used") \ 21297685Sache \ 213091141Scjc develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 213191141Scjc "Number of collections before the adaptive sizing is started") \ 21327685Sache \ 21337685Sache product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2134215249Stuexen "Collecton interval for printing information; zero => never") \ 2135131994Scperciva \ 2136131994Scperciva product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 21377685Sache "Use adaptive minimum footprint as a goal") \ 213829928Smarkm \ 213929928Smarkm product(uintx, AdaptiveSizePolicyWeight, 10, \ 21407685Sache "Weight given to exponential resizing, between 0 and 100") \ 21417685Sache \ 21427685Sache product(uintx, AdaptiveTimeWeight, 25, \ 21437685Sache "Weight given to time in adaptive policy, between 0 and 100") \ 21447685Sache \ 214591141Scjc product(uintx, PausePadding, 1, \ 214691141Scjc "How much buffer to keep for pause time") \ 214729928Smarkm \ 214829928Smarkm product(uintx, PromotedPadding, 3, \ 214929928Smarkm "How much buffer to keep for promotion failure") \ 215010808Sgibbs \ 215129928Smarkm product(uintx, SurvivorPadding, 3, \ 215229928Smarkm "How much buffer to keep for survivor overflow") \ 215329928Smarkm \ 215410808Sgibbs product(uintx, AdaptivePermSizeWeight, 20, \ 215529928Smarkm "Weight for perm gen exponential resizing, between 0 and 100") \ 21567685Sache \ 21577685Sache product(uintx, PermGenPadding, 3, \ 2158168625Sstas "How much buffer to keep for perm gen sizing") \ 2159168625Sstas \ 2160168625Sstas product(uintx, ThresholdTolerance, 10, \ 2161168625Sstas "Allowed collection cost difference between generations") \ 2162215249Stuexen \ 2163215249Stuexen product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 21647685Sache "If collection costs are within margin, reduce both by full " \ 21657685Sache "delta") \ 21667685Sache \ 21677685Sache product(uintx, YoungGenerationSizeIncrement, 20, \ 21687685Sache "Adaptive size percentage change in young generation") \ 21697685Sache \ 217027017Speter product(uintx, YoungGenerationSizeSupplement, 80, \ 217127017Speter "Supplement to YoungedGenerationSizeIncrement used at startup") \ 217291141Scjc \ 217391141Scjc product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 217491141Scjc "Decay factor to YoungedGenerationSizeSupplement") \ 217591141Scjc \ 217691141Scjc product(uintx, TenuredGenerationSizeIncrement, 20, \ 217791141Scjc "Adaptive size percentage change in tenured generation") \ 217891141Scjc \ 217991141Scjc product(uintx, TenuredGenerationSizeSupplement, 80, \ 21807685Sache "Supplement to TenuredGenerationSizeIncrement used at startup") \ 21817685Sache \ 21827685Sache product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 21837685Sache "Decay factor to TenuredGenerationSizeIncrement") \ 21847685Sache \ 218536489Sandreas product(uintx, MaxGCPauseMillis, max_uintx, \ 218636489Sandreas "Adaptive size policy maximum GC pause time goal in msec, " \ 218736489Sandreas "or (G1 Only) the max. GC time per MMU time slice") \ 218836489Sandreas \ 218936489Sandreas product(uintx, GCPauseIntervalMillis, 0, \ 219036489Sandreas "Time slice for MMU specification") \ 219175694Sume \ 2192131732Scperciva product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2193131732Scperciva "Adaptive size policy maximum GC minor pause time goal in msec") \ 219436489Sandreas \ 21957685Sache product(uintx, GCTimeRatio, 99, \ 21967685Sache "Adaptive size policy application time to GC time ratio") \ 2197215249Stuexen \ 2198215249Stuexen product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2199215249Stuexen "Adaptive size scale down factor for shrinking") \ 2200215249Stuexen \ 2201215249Stuexen product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2202215249Stuexen "Adaptive size decays the major cost for long major intervals") \ 2203215249Stuexen \ 2204215249Stuexen product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2205215249Stuexen "Time scale over which major costs decay") \ 2206215249Stuexen \ 2207215249Stuexen product(uintx, MinSurvivorRatio, 3, \ 2208107765Seric "Minimum ratio of young generation/survivor space size") \ 2209107765Seric \ 22107685Sache product(uintx, InitialSurvivorRatio, 8, \ 22117685Sache "Initial ratio of eden/survivor space size") \ 2212154822Smaxim \ 2213154822Smaxim product(uintx, BaseFootPrintEstimate, 256*M, \ 221417771Sasami "Estimate of footprint other than Java Heap") \ 2215215249Stuexen \ 22167685Sache product(bool, UseGCOverheadLimit, true, \ 22177685Sache "Use policy to limit of proportion of time spent in GC " \ 2218172089Smr "before an OutOfMemory error is thrown") \ 2219172089Smr \ 22207685Sache product(uintx, GCTimeLimit, 98, \ 22217685Sache "Limit of proportion of time spent in GC before an OutOfMemory" \ 2222233772Sivoras "error is thrown (used with GCHeapFreeLimit)") \ 2223233772Sivoras \ 22247685Sache product(uintx, GCHeapFreeLimit, 2, \ 22257685Sache "Minimum percentage of free space after a full GC before an " \ 2226120136Sobrien "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 22277685Sache \ 22287685Sache develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 22297685Sache "Number of consecutive collections before gc time limit fires") \ 2230131994Scperciva \ 22317685Sache product(bool, PrintAdaptiveSizePolicy, false, \ 22327685Sache "Print information about AdaptiveSizePolicy") \ 22337685Sache \ 22347685Sache product(intx, PrefetchCopyIntervalInBytes, -1, \ 2235131732Scperciva "How far ahead to prefetch destination area (<= 0 means off)") \ 2236131732Scperciva \ 2237215249Stuexen product(intx, PrefetchScanIntervalInBytes, -1, \ 2238215249Stuexen "How far ahead to prefetch scan area (<= 0 means off)") \ 2239133847Scperciva \ 2240133847Scperciva product(intx, PrefetchFieldsAhead, -1, \ 2241120909Sbms "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2242120909Sbms \ 2243215249Stuexen develop(bool, UsePrefetchQueue, true, \ 2244215249Stuexen "Use the prefetch queue during PS promotion") \ 2245215249Stuexen \ 2246215249Stuexen diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2247215249Stuexen "Verify system before exiting") \ 2248215249Stuexen \ 2249215249Stuexen diagnostic(bool, VerifyBeforeGC, false, \ 22507685Sache "Verify memory system before GC") \ 22517685Sache \ 2252131732Scperciva diagnostic(bool, VerifyAfterGC, false, \ 2253131732Scperciva "Verify memory system after GC") \ 2254131732Scperciva \ 2255131732Scperciva diagnostic(bool, VerifyDuringGC, false, \ 2256131732Scperciva "Verify memory system during GC (between phases)") \ 2257131732Scperciva \ 225891141Scjc diagnostic(bool, GCParallelVerificationEnabled, true, \ 225991141Scjc "Enable parallel memory system verification") \ 2260131994Scperciva \ 22617685Sache diagnostic(bool, DeferInitialCardMark, false, \ 22627685Sache "When +ReduceInitialCardMarks, explicitly defer any that " \ 22637685Sache "may arise from new_pre_store_barrier") \ 22647685Sache \ 22657685Sache diagnostic(bool, VerifyRememberedSets, false, \ 2266203342Sume "Verify GC remembered sets") \ 2267203342Sume \ 22687685Sache diagnostic(bool, VerifyObjectStartArray, true, \ 22697685Sache "Verify GC object start array if verify before/after") \ 22707685Sache \ 22717685Sache product(bool, DisableExplicitGC, false, \ 2272203067Sedwin "Tells whether calling System.gc() does a full GC") \ 2273203067Sedwin \ 22747685Sache notproduct(bool, CheckMemoryInitialization, false, \ 22757685Sache "Checks memory initialization") \ 227691141Scjc \ 22777685Sache product(bool, CollectGen0First, false, \ 22787685Sache "Collect youngest generation before each full GC") \ 22797685Sache \ 22807685Sache diagnostic(bool, BindCMSThreadToCPU, false, \ 22817685Sache "Bind CMS Thread to CPU if possible") \ 228218270Spst \ 228318270Spst diagnostic(uintx, CPUForCMSThread, 0, \ 22847685Sache "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 22857685Sache \ 2286215249Stuexen product(bool, BindGCTaskThreadsToCPUs, false, \ 2287215249Stuexen "Bind GCTaskThreads to CPUs if possible") \ 2288215249Stuexen \ 2289215249Stuexen product(bool, UseGCTaskAffinity, false, \ 2290215249Stuexen "Use worker affinity when asking for GCTasks") \ 2291215249Stuexen \ 22927685Sache product(uintx, ProcessDistributionStride, 4, \ 22937685Sache "Stride through processors when distributing processes") \ 22947685Sache \ 22957685Sache product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 22967685Sache "number of times the coordinator GC thread will sleep while " \ 22977685Sache "yielding before giving up and resuming GC") \ 22987685Sache \ 22997685Sache product(uintx, CMSYieldSleepCount, 0, \ 230091141Scjc "number of times a GC thread (minus the coordinator) " \ 230191141Scjc "will sleep while yielding before giving up and resuming GC") \ 23027685Sache \ 23037685Sache /* gc tracing */ \ 2304169591Sgrog manageable(bool, PrintGC, false, \ 2305169591Sgrog "Print message at garbage collect") \ 2306169591Sgrog \ 2307169591Sgrog manageable(bool, PrintGCDetails, false, \ 2308169591Sgrog "Print more details at garbage collect") \ 2309169591Sgrog \ 2310215249Stuexen manageable(bool, PrintGCDateStamps, false, \ 2311215249Stuexen "Print date stamps at garbage collect") \ 231291141Scjc \ 231391141Scjc manageable(bool, PrintGCTimeStamps, false, \ 23147685Sache "Print timestamps at garbage collect") \ 23157685Sache \ 23167685Sache product(bool, PrintGCTaskTimeStamps, false, \ 23177685Sache "Print timestamps for individual gc worker thread tasks") \ 23187685Sache \ 23197685Sache develop(intx, ConcGCYieldTimeout, 0, \ 23207685Sache "If non-zero, assert that GC threads yield within this # of ms.") \ 23217685Sache \ 2322168618Sstas notproduct(bool, TraceMarkSweep, false, \ 2323168618Sstas "Trace mark sweep") \ 23247685Sache \ 23257685Sache product(bool, PrintReferenceGC, false, \ 2326168618Sstas "Print times spent handling reference objects during GC " \ 2327168618Sstas " (enabled only when PrintGCDetails)") \ 23287685Sache \ 23297685Sache develop(bool, TraceReferenceGC, false, \ 23307685Sache "Trace handling of soft/weak/final/phantom references") \ 23317685Sache \ 23327685Sache develop(bool, TraceFinalizerRegistration, false, \ 23337685Sache "Trace registration of final references") \ 23347685Sache \ 23357685Sache notproduct(bool, TraceScavenge, false, \ 233691141Scjc "Trace scavenge") \ 233791141Scjc \ 233891141Scjc product_rw(bool, TraceClassLoading, false, \ 233991141Scjc "Trace all classes loaded") \ 234034638Sjseger \ 234134638Sjseger product(bool, TraceClassLoadingPreorder, false, \ 2342114209Smdodd "Trace all classes loaded in order referenced (not loaded)") \ 2343114209Smdodd \ 234491273Scjc product_rw(bool, TraceClassUnloading, false, \ 234591273Scjc "Trace unloading of classes") \ 234615084Sjoerg \ 2347215249Stuexen product_rw(bool, TraceLoaderConstraints, false, \ 2348215249Stuexen "Trace loader constraints") \ 2349215249Stuexen \ 2350215249Stuexen product(bool, TraceGen0Time, false, \ 2351215249Stuexen "Trace accumulated time for Gen 0 collection") \ 2352215249Stuexen \ 235329571Sasami product(bool, TraceGen1Time, false, \ 23547685Sache "Trace accumulated time for Gen 1 collection") \ 23557685Sache \ 23567685Sache product(bool, PrintTenuringDistribution, false, \ 23577685Sache "Print tenuring age information") \ 235891141Scjc \ 235991141Scjc product_rw(bool, PrintHeapAtGC, false, \ 236091141Scjc "Print heap layout before and after each GC") \ 236191141Scjc \ 236291141Scjc product_rw(bool, PrintHeapAtGCExtended, false, \ 236391141Scjc "Prints extended information about the layout of the heap " \ 236448968Sobrien "when -XX:+PrintHeapAtGC is set") \ 236580961Sdougb \ 236680961Sdougb product(bool, PrintHeapAtSIGBREAK, true, \ 236780961Sdougb "Print heap layout in response to SIGBREAK") \ 236880961Sdougb \ 23697685Sache manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 23707685Sache "Print a class histogram before any major stop-world GC") \ 23717685Sache \ 23727685Sache manageable(bool, PrintClassHistogramAfterFullGC, false, \ 23737685Sache "Print a class histogram after any major stop-world GC") \ 23747685Sache \ 23757685Sache manageable(bool, PrintClassHistogram, false, \ 23767685Sache "Print a histogram of class instances") \ 23777685Sache \ 23787685Sache develop(bool, TraceWorkGang, false, \ 23797685Sache "Trace activities of work gangs") \ 23807685Sache \ 23817685Sache product(bool, TraceParallelOldGCTasks, false, \ 23827685Sache "Trace multithreaded GC activity") \ 23837685Sache \ 23847685Sache develop(bool, TraceBlockOffsetTable, false, \ 23857685Sache "Print BlockOffsetTable maps") \ 23867685Sache \ 23877685Sache develop(bool, TraceCardTableModRefBS, false, \ 23887685Sache "Print CardTableModRefBS maps") \ 2389172065Sbrooks \ 2390172065Sbrooks develop(bool, TraceGCTaskManager, false, \ 2391172065Sbrooks "Trace actions of the GC task manager") \ 2392172260Sbrooks \ 239391141Scjc develop(bool, TraceGCTaskQueue, false, \ 239491141Scjc "Trace actions of the GC task queues") \ 2395203574Sbms \ 2396203574Sbms diagnostic(bool, TraceGCTaskThread, false, \ 239786699Sobrien "Trace actions of the GC task threads") \ 2398215249Stuexen \ 2399215249Stuexen product(bool, PrintParallelOldGCPhaseTimes, false, \ 2400215249Stuexen "Print the time taken by each parallel old gc phase." \ 24017685Sache "PrintGCDetails must also be enabled.") \ 24027685Sache \ 240391141Scjc develop(bool, TraceParallelOldGCMarkingPhase, false, \ 240491141Scjc "Trace parallel old gc marking phase") \ 24057685Sache \ 24067685Sache develop(bool, TraceParallelOldGCSummaryPhase, false, \ 24077685Sache "Trace parallel old gc summary phase") \ 24087685Sache \ 24097685Sache develop(bool, TraceParallelOldGCCompactionPhase, false, \ 24107685Sache "Trace parallel old gc compaction phase") \ 24117685Sache \ 24127685Sache develop(bool, TraceParallelOldGCDensePrefix, false, \ 241362630Ssheldonh "Trace parallel old gc dense prefix computation") \ 241462630Ssheldonh \ 24157685Sache develop(bool, IgnoreLibthreadGPFault, false, \ 24167685Sache "Suppress workaround for libthread GP fault") \ 24177685Sache \ 24187685Sache product(bool, PrintJNIGCStalls, false, \ 24197685Sache "Print diagnostic message when GC is stalled" \ 24207685Sache "by JNI critical section") \ 24217685Sache \ 24227685Sache /* GC log rotation setting */ \ 242379093Sassar \ 242479093Sassar product(bool, UseGCLogFileRotation, false, \ 2425131732Scperciva "Prevent large gclog file for long running app. " \ 2426131732Scperciva "Requires -Xloggc:<filename>") \ 242779093Sassar \ 242879093Sassar product(uintx, NumberOfGCLogFiles, 0, \ 24297685Sache "Number of gclog files in rotation, " \ 24307685Sache "Default: 0, no rotation") \ 243191141Scjc \ 243291141Scjc product(uintx, GCLogFileSize, 0, \ 24337685Sache "GC log file size, Default: 0 bytes, no rotation " \ 24347685Sache "Only valid with UseGCLogFileRotation") \ 2435215249Stuexen \ 2436215249Stuexen /* JVMTI heap profiling */ \ 2437129789Smlaier \ 2438215249Stuexen diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2439215249Stuexen "Trace JVMTI object tagging calls") \ 244037370Sbrian \ 2441215249Stuexen diagnostic(bool, VerifyBeforeIteration, false, \ 2442215249Stuexen "Verify memory system before JVMTI iteration") \ 2443215249Stuexen \ 2444215249Stuexen /* compiler interface */ \ 244535850Sphk \ 2446203066Sedwin develop(bool, CIPrintCompilerName, false, \ 2447203066Sedwin "when CIPrint is active, print the name of the active compiler") \ 24487685Sache \ 24497685Sache develop(bool, CIPrintCompileQueue, false, \ 24507685Sache "display the contents of the compile queue whenever a " \ 24517685Sache "compilation is enqueued") \ 2452215249Stuexen \ 2453215249Stuexen develop(bool, CIPrintRequests, false, \ 2454215249Stuexen "display every request for compilation") \ 2455215249Stuexen \ 2456215249Stuexen product(bool, CITime, false, \ 2457215249Stuexen "collect timing information for compilation") \ 2458168624Sstas \ 245917106Spst develop(bool, CITimeEach, false, \ 246024473Spst "display timing information after each successful compilation") \ 246124473Spst \ 2462215249Stuexen develop(bool, CICountOSR, true, \ 2463215249Stuexen "use a separate counter when assigning ids to osr compilations") \ 2464215249Stuexen \ 2465215249Stuexen develop(bool, CICompileNatives, true, \ 2466215249Stuexen "compile native methods if supported by the compiler") \ 24677685Sache \ 24687685Sache develop_pd(bool, CICompileOSR, \ 2469131994Scperciva "compile on stack replacement methods if supported by the " \ 2470131994Scperciva "compiler") \ 2471215249Stuexen \ 2472215249Stuexen develop(bool, CIPrintMethodCodes, false, \ 2473215249Stuexen "print method bytecodes of the compiled code") \ 2474131994Scperciva \ 2475131994Scperciva develop(bool, CIPrintTypeFlow, false, \ 2476131994Scperciva "print the results of ciTypeFlow analysis") \ 2477131994Scperciva \ 247829606Sasami develop(bool, CITraceTypeFlow, false, \ 2479215249Stuexen "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2480215249Stuexen \ 2481215249Stuexen develop(intx, CICloneLoopTestLimit, 100, \ 2482215249Stuexen "size limit for blocks heuristically cloned in ciTypeFlow") \ 2483215249Stuexen \ 2484131994Scperciva develop(intx, OSROnlyBCI, -1, \ 2485131994Scperciva "OSR only at this bci. Negative values mean exclude that bci") \ 2486 \ 2487 /* temp diagnostics */ \ 2488 \ 2489 diagnostic(bool, TraceRedundantCompiles, false, \ 2490 "Have compile broker print when a request already in the queue is"\ 2491 " requested again") \ 2492 \ 2493 diagnostic(bool, InitialCompileFast, false, \ 2494 "Initial compile at CompLevel_fast_compile") \ 2495 \ 2496 diagnostic(bool, InitialCompileReallyFast, false, \ 2497 "Initial compile at CompLevel_really_fast_compile (no profile)") \ 2498 \ 2499 diagnostic(bool, FullProfileOnReInterpret, true, \ 2500 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 2501 \ 2502 /* compiler */ \ 2503 \ 2504 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2505 "Number of compiler threads to run") \ 2506 \ 2507 product(intx, CompilationPolicyChoice, 0, \ 2508 "which compilation policy (0/1)") \ 2509 \ 2510 develop(bool, UseStackBanging, true, \ 2511 "use stack banging for stack overflow checks (required for " \ 2512 "proper StackOverflow handling; disable only to measure cost " \ 2513 "of stackbanging)") \ 2514 \ 2515 develop(bool, Use24BitFPMode, true, \ 2516 "Set 24-bit FPU mode on a per-compile basis ") \ 2517 \ 2518 develop(bool, Use24BitFP, true, \ 2519 "use FP instructions that produce 24-bit precise results") \ 2520 \ 2521 develop(bool, UseStrictFP, true, \ 2522 "use strict fp if modifier strictfp is set") \ 2523 \ 2524 develop(bool, GenerateSynchronizationCode, true, \ 2525 "generate locking/unlocking code for synchronized methods and " \ 2526 "monitors") \ 2527 \ 2528 develop(bool, GenerateCompilerNullChecks, true, \ 2529 "Generate explicit null checks for loads/stores/calls") \ 2530 \ 2531 develop(bool, GenerateRangeChecks, true, \ 2532 "Generate range checks for array accesses") \ 2533 \ 2534 develop_pd(bool, ImplicitNullChecks, \ 2535 "generate code for implicit null checks") \ 2536 \ 2537 product(bool, PrintSafepointStatistics, false, \ 2538 "print statistics about safepoint synchronization") \ 2539 \ 2540 product(intx, PrintSafepointStatisticsCount, 300, \ 2541 "total number of safepoint statistics collected " \ 2542 "before printing them out") \ 2543 \ 2544 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2545 "print safepoint statistics only when safepoint takes" \ 2546 " more than PrintSafepointSatisticsTimeout in millis") \ 2547 \ 2548 product(bool, TraceSafepointCleanupTime, false, \ 2549 "print the break down of clean up tasks performed during" \ 2550 " safepoint") \ 2551 \ 2552 develop(bool, InlineAccessors, true, \ 2553 "inline accessor methods (get/set)") \ 2554 \ 2555 product(bool, Inline, true, \ 2556 "enable inlining") \ 2557 \ 2558 product(bool, ClipInlining, true, \ 2559 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2560 \ 2561 develop(bool, UseCHA, true, \ 2562 "enable CHA") \ 2563 \ 2564 product(bool, UseTypeProfile, true, \ 2565 "Check interpreter profile for historically monomorphic calls") \ 2566 \ 2567 product(intx, TypeProfileMajorReceiverPercent, 90, \ 2568 "% of major receiver type to all profiled receivers") \ 2569 \ 2570 notproduct(bool, TimeCompiler, false, \ 2571 "time the compiler") \ 2572 \ 2573 notproduct(bool, TimeCompiler2, false, \ 2574 "detailed time the compiler (requires +TimeCompiler)") \ 2575 \ 2576 diagnostic(bool, PrintInlining, false, \ 2577 "prints inlining optimizations") \ 2578 \ 2579 diagnostic(bool, PrintIntrinsics, false, \ 2580 "prints attempted and successful inlining of intrinsics") \ 2581 \ 2582 product(bool, UseCountLeadingZerosInstruction, false, \ 2583 "Use count leading zeros instruction") \ 2584 \ 2585 product(bool, UsePopCountInstruction, false, \ 2586 "Use population count instruction") \ 2587 \ 2588 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2589 "do not expand intrinsics whose (internal) names appear here") \ 2590 \ 2591 develop(bool, StressReflectiveCode, false, \ 2592 "Use inexact types at allocations, etc., to test reflection") \ 2593 \ 2594 develop(bool, EagerInitialization, false, \ 2595 "Eagerly initialize classes if possible") \ 2596 \ 2597 develop(bool, TraceMethodReplacement, false, \ 2598 "Print when methods are replaced do to recompilation") \ 2599 \ 2600 develop(bool, PrintMethodFlushing, false, \ 2601 "print the nmethods being flushed") \ 2602 \ 2603 notproduct(bool, LogMultipleMutexLocking, false, \ 2604 "log locking and unlocking of mutexes (only if multiple locks " \ 2605 "are held)") \ 2606 \ 2607 develop(bool, UseRelocIndex, false, \ 2608 "use an index to speed random access to relocations") \ 2609 \ 2610 develop(bool, StressCodeBuffers, false, \ 2611 "Exercise code buffer expansion and other rare state changes") \ 2612 \ 2613 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2614 "Generate extra debugging info for non-safepoints in nmethods") \ 2615 \ 2616 diagnostic(bool, DebugInlinedCalls, true, \ 2617 "If false, restricts profiled locations to the root method only") \ 2618 \ 2619 product(bool, PrintVMOptions, false, \ 2620 "Print flags that appeared on the command line") \ 2621 \ 2622 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2623 "Ignore unrecognized VM options") \ 2624 \ 2625 product(bool, PrintCommandLineFlags, false, \ 2626 "Print flags specified on command line or set by ergonomics") \ 2627 \ 2628 product(bool, PrintFlagsInitial, false, \ 2629 "Print all VM flags before argument processing and exit VM") \ 2630 \ 2631 product(bool, PrintFlagsFinal, false, \ 2632 "Print all VM flags after argument and ergonomic processing") \ 2633 \ 2634 notproduct(bool, PrintFlagsWithComments, false, \ 2635 "Print all VM flags with default values and descriptions and exit")\ 2636 \ 2637 diagnostic(bool, SerializeVMOutput, true, \ 2638 "Use a mutex to serialize output to tty and hotspot.log") \ 2639 \ 2640 diagnostic(bool, DisplayVMOutput, true, \ 2641 "Display all VM output on the tty, independently of LogVMOutput") \ 2642 \ 2643 diagnostic(bool, LogVMOutput, trueInDebug, \ 2644 "Save VM output to hotspot.log, or to LogFile") \ 2645 \ 2646 diagnostic(ccstr, LogFile, NULL, \ 2647 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2648 \ 2649 product(ccstr, ErrorFile, NULL, \ 2650 "If an error occurs, save the error data to this file " \ 2651 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2652 \ 2653 product(bool, DisplayVMOutputToStderr, false, \ 2654 "If DisplayVMOutput is true, display all VM output to stderr") \ 2655 \ 2656 product(bool, DisplayVMOutputToStdout, false, \ 2657 "If DisplayVMOutput is true, display all VM output to stdout") \ 2658 \ 2659 product(bool, UseHeavyMonitors, false, \ 2660 "use heavyweight instead of lightweight Java monitors") \ 2661 \ 2662 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2663 "print histogram of the symbol table") \ 2664 \ 2665 notproduct(bool, ExitVMOnVerifyError, false, \ 2666 "standard exit from VM if bytecode verify error " \ 2667 "(only in debug mode)") \ 2668 \ 2669 notproduct(ccstr, AbortVMOnException, NULL, \ 2670 "Call fatal if this exception is thrown. Example: " \ 2671 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2672 \ 2673 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2674 "Call fatal if the exception pointed by AbortVMOnException " \ 2675 "has this message.") \ 2676 \ 2677 develop(bool, DebugVtables, false, \ 2678 "add debugging code to vtable dispatch") \ 2679 \ 2680 develop(bool, PrintVtables, false, \ 2681 "print vtables when printing klass") \ 2682 \ 2683 notproduct(bool, PrintVtableStats, false, \ 2684 "print vtables stats at end of run") \ 2685 \ 2686 develop(bool, TraceCreateZombies, false, \ 2687 "trace creation of zombie nmethods") \ 2688 \ 2689 notproduct(bool, IgnoreLockingAssertions, false, \ 2690 "disable locking assertions (for speed)") \ 2691 \ 2692 notproduct(bool, VerifyLoopOptimizations, false, \ 2693 "verify major loop optimizations") \ 2694 \ 2695 product(bool, RangeCheckElimination, true, \ 2696 "Split loop iterations to eliminate range checks") \ 2697 \ 2698 develop_pd(bool, UncommonNullCast, \ 2699 "track occurrences of null in casts; adjust compiler tactics") \ 2700 \ 2701 develop(bool, TypeProfileCasts, true, \ 2702 "treat casts like calls for purposes of type profiling") \ 2703 \ 2704 develop(bool, MonomorphicArrayCheck, true, \ 2705 "Uncommon-trap array store checks that require full type check") \ 2706 \ 2707 diagnostic(bool, ProfileDynamicTypes, true, \ 2708 "do extra type profiling and use it more aggressively") \ 2709 \ 2710 develop(bool, DelayCompilationDuringStartup, true, \ 2711 "Delay invoking the compiler until main application class is " \ 2712 "loaded") \ 2713 \ 2714 develop(bool, CompileTheWorld, false, \ 2715 "Compile all methods in all classes in bootstrap class path " \ 2716 "(stress test)") \ 2717 \ 2718 develop(bool, CompileTheWorldPreloadClasses, true, \ 2719 "Preload all classes used by a class before start loading") \ 2720 \ 2721 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2722 "Force a safepoint every n compiles so sweeper can keep up") \ 2723 \ 2724 develop(bool, TraceIterativeGVN, false, \ 2725 "Print progress during Iterative Global Value Numbering") \ 2726 \ 2727 develop(bool, FillDelaySlots, true, \ 2728 "Fill delay slots (on SPARC only)") \ 2729 \ 2730 develop(bool, VerifyIterativeGVN, false, \ 2731 "Verify Def-Use modifications during sparse Iterative Global " \ 2732 "Value Numbering") \ 2733 \ 2734 notproduct(bool, TracePhaseCCP, false, \ 2735 "Print progress during Conditional Constant Propagation") \ 2736 \ 2737 develop(bool, TimeLivenessAnalysis, false, \ 2738 "Time computation of bytecode liveness analysis") \ 2739 \ 2740 develop(bool, TraceLivenessGen, false, \ 2741 "Trace the generation of liveness analysis information") \ 2742 \ 2743 notproduct(bool, TraceLivenessQuery, false, \ 2744 "Trace queries of liveness analysis information") \ 2745 \ 2746 notproduct(bool, CollectIndexSetStatistics, false, \ 2747 "Collect information about IndexSets") \ 2748 \ 2749 develop(bool, PrintDominators, false, \ 2750 "Print out dominator trees for GVN") \ 2751 \ 2752 develop(bool, UseLoopSafepoints, true, \ 2753 "Generate Safepoint nodes in every loop") \ 2754 \ 2755 notproduct(bool, TraceCISCSpill, false, \ 2756 "Trace allocators use of cisc spillable instructions") \ 2757 \ 2758 notproduct(bool, TraceSpilling, false, \ 2759 "Trace spilling") \ 2760 \ 2761 product(bool, SplitIfBlocks, true, \ 2762 "Clone compares and control flow through merge points to fold " \ 2763 "some branches") \ 2764 \ 2765 develop(intx, FastAllocateSizeLimit, 128*K, \ 2766 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2767 "Inline allocations larger than this in doublewords must go slow")\ 2768 \ 2769 product(bool, AggressiveOpts, false, \ 2770 "Enable aggressive optimizations - see arguments.cpp") \ 2771 \ 2772 product(bool, UseStringCache, false, \ 2773 "Enable String cache capabilities on String.java") \ 2774 \ 2775 /* statistics */ \ 2776 develop(bool, CountCompiledCalls, false, \ 2777 "counts method invocations") \ 2778 \ 2779 notproduct(bool, CountRuntimeCalls, false, \ 2780 "counts VM runtime calls") \ 2781 \ 2782 develop(bool, CountJNICalls, false, \ 2783 "counts jni method invocations") \ 2784 \ 2785 notproduct(bool, CountJVMCalls, false, \ 2786 "counts jvm method invocations") \ 2787 \ 2788 notproduct(bool, CountRemovableExceptions, false, \ 2789 "count exceptions that could be replaced by branches due to " \ 2790 "inlining") \ 2791 \ 2792 notproduct(bool, ICMissHistogram, false, \ 2793 "produce histogram of IC misses") \ 2794 \ 2795 notproduct(bool, PrintClassStatistics, false, \ 2796 "prints class statistics at end of run") \ 2797 \ 2798 notproduct(bool, PrintMethodStatistics, false, \ 2799 "prints method statistics at end of run") \ 2800 \ 2801 /* interpreter */ \ 2802 develop(bool, ClearInterpreterLocals, false, \ 2803 "Always clear local variables of interpreter activations upon " \ 2804 "entry") \ 2805 \ 2806 product_pd(bool, RewriteBytecodes, \ 2807 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2808 \ 2809 product_pd(bool, RewriteFrequentPairs, \ 2810 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2811 \ 2812 diagnostic(bool, PrintInterpreter, false, \ 2813 "Prints the generated interpreter code") \ 2814 \ 2815 product(bool, UseInterpreter, true, \ 2816 "Use interpreter for non-compiled methods") \ 2817 \ 2818 develop(bool, UseFastSignatureHandlers, true, \ 2819 "Use fast signature handlers for native calls") \ 2820 \ 2821 develop(bool, UseV8InstrsOnly, false, \ 2822 "Use SPARC-V8 Compliant instruction subset") \ 2823 \ 2824 product(bool, UseNiagaraInstrs, false, \ 2825 "Use Niagara-efficient instruction subset") \ 2826 \ 2827 develop(bool, UseCASForSwap, false, \ 2828 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2829 \ 2830 product(bool, UseLoopCounter, true, \ 2831 "Increment invocation counter on backward branch") \ 2832 \ 2833 product(bool, UseFastEmptyMethods, true, \ 2834 "Use fast method entry code for empty methods") \ 2835 \ 2836 product(bool, UseFastAccessorMethods, true, \ 2837 "Use fast method entry code for accessor methods") \ 2838 \ 2839 product_pd(bool, UseOnStackReplacement, \ 2840 "Use on stack replacement, calls runtime if invoc. counter " \ 2841 "overflows in loop") \ 2842 \ 2843 notproduct(bool, TraceOnStackReplacement, false, \ 2844 "Trace on stack replacement") \ 2845 \ 2846 develop(bool, PoisonOSREntry, true, \ 2847 "Detect abnormal calls to OSR code") \ 2848 \ 2849 product_pd(bool, PreferInterpreterNativeStubs, \ 2850 "Use always interpreter stubs for native methods invoked via " \ 2851 "interpreter") \ 2852 \ 2853 develop(bool, CountBytecodes, false, \ 2854 "Count number of bytecodes executed") \ 2855 \ 2856 develop(bool, PrintBytecodeHistogram, false, \ 2857 "Print histogram of the executed bytecodes") \ 2858 \ 2859 develop(bool, PrintBytecodePairHistogram, false, \ 2860 "Print histogram of the executed bytecode pairs") \ 2861 \ 2862 diagnostic(bool, PrintSignatureHandlers, false, \ 2863 "Print code generated for native method signature handlers") \ 2864 \ 2865 develop(bool, VerifyOops, false, \ 2866 "Do plausibility checks for oops") \ 2867 \ 2868 develop(bool, CheckUnhandledOops, false, \ 2869 "Check for unhandled oops in VM code") \ 2870 \ 2871 develop(bool, VerifyJNIFields, trueInDebug, \ 2872 "Verify jfieldIDs for instance fields") \ 2873 \ 2874 notproduct(bool, VerifyJNIEnvThread, false, \ 2875 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2876 "from JNI") \ 2877 \ 2878 develop(bool, VerifyFPU, false, \ 2879 "Verify FPU state (check for NaN's, etc.)") \ 2880 \ 2881 develop(bool, VerifyThread, false, \ 2882 "Watch the thread register for corruption (SPARC only)") \ 2883 \ 2884 develop(bool, VerifyActivationFrameSize, false, \ 2885 "Verify that activation frame didn't become smaller than its " \ 2886 "minimal size") \ 2887 \ 2888 develop(bool, TraceFrequencyInlining, false, \ 2889 "Trace frequency based inlining") \ 2890 \ 2891 notproduct(bool, TraceTypeProfile, false, \ 2892 "Trace type profile") \ 2893 \ 2894 develop_pd(bool, InlineIntrinsics, \ 2895 "Inline intrinsics that can be statically resolved") \ 2896 \ 2897 product_pd(bool, ProfileInterpreter, \ 2898 "Profile at the bytecode level during interpretation") \ 2899 \ 2900 develop_pd(bool, ProfileTraps, \ 2901 "Profile deoptimization traps at the bytecode level") \ 2902 \ 2903 product(intx, ProfileMaturityPercentage, 20, \ 2904 "number of method invocations/branches (expressed as % of " \ 2905 "CompileThreshold) before using the method's profile") \ 2906 \ 2907 develop(bool, PrintMethodData, false, \ 2908 "Print the results of +ProfileInterpreter at end of run") \ 2909 \ 2910 develop(bool, VerifyDataPointer, trueInDebug, \ 2911 "Verify the method data pointer during interpreter profiling") \ 2912 \ 2913 develop(bool, VerifyCompiledCode, false, \ 2914 "Include miscellaneous runtime verifications in nmethod code; " \ 2915 "default off because it disturbs nmethod size heuristics") \ 2916 \ 2917 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2918 "Manually make GC thread crash then dump java stack trace; " \ 2919 "Test only") \ 2920 \ 2921 /* compilation */ \ 2922 product(bool, UseCompiler, true, \ 2923 "use compilation") \ 2924 \ 2925 develop(bool, TraceCompilationPolicy, false, \ 2926 "Trace compilation policy") \ 2927 \ 2928 develop(bool, TimeCompilationPolicy, false, \ 2929 "Time the compilation policy") \ 2930 \ 2931 product(bool, UseCounterDecay, true, \ 2932 "adjust recompilation counters") \ 2933 \ 2934 develop(intx, CounterHalfLifeTime, 30, \ 2935 "half-life time of invocation counters (in secs)") \ 2936 \ 2937 develop(intx, CounterDecayMinIntervalLength, 500, \ 2938 "Min. ms. between invocation of CounterDecay") \ 2939 \ 2940 product(bool, AlwaysCompileLoopMethods, false, \ 2941 "when using recompilation, never interpret methods " \ 2942 "containing loops") \ 2943 \ 2944 product(bool, DontCompileHugeMethods, true, \ 2945 "don't compile methods > HugeMethodLimit") \ 2946 \ 2947 /* Bytecode escape analysis estimation. */ \ 2948 product(bool, EstimateArgEscape, true, \ 2949 "Analyze bytecodes to estimate escape state of arguments") \ 2950 \ 2951 product(intx, BCEATraceLevel, 0, \ 2952 "How much tracing to do of bytecode escape analysis estimates") \ 2953 \ 2954 product(intx, MaxBCEAEstimateLevel, 5, \ 2955 "Maximum number of nested calls that are analyzed by BC EA.") \ 2956 \ 2957 product(intx, MaxBCEAEstimateSize, 150, \ 2958 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2959 \ 2960 product(intx, AllocatePrefetchStyle, 1, \ 2961 "0 = no prefetch, " \ 2962 "1 = prefetch instructions for each allocation, " \ 2963 "2 = use TLAB watermark to gate allocation prefetch, " \ 2964 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2965 \ 2966 product(intx, AllocatePrefetchDistance, -1, \ 2967 "Distance to prefetch ahead of allocation pointer") \ 2968 \ 2969 product(intx, AllocatePrefetchLines, 3, \ 2970 "Number of lines to prefetch ahead of array allocation pointer") \ 2971 \ 2972 product(intx, AllocateInstancePrefetchLines, 1, \ 2973 "Number of lines to prefetch ahead of instance allocation pointer") \ 2974 \ 2975 product(intx, AllocatePrefetchStepSize, 16, \ 2976 "Step size in bytes of sequential prefetch instructions") \ 2977 \ 2978 product(intx, AllocatePrefetchInstr, 0, \ 2979 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2980 \ 2981 product(intx, ReadPrefetchInstr, 0, \ 2982 "Prefetch instruction to prefetch ahead") \ 2983 \ 2984 product(uintx, ArraycopySrcPrefetchDistance, 0, \ 2985 "Distance to prefetch source array in arracopy") \ 2986 \ 2987 product(uintx, ArraycopyDstPrefetchDistance, 0, \ 2988 "Distance to prefetch destination array in arracopy") \ 2989 \ 2990 /* deoptimization */ \ 2991 develop(bool, TraceDeoptimization, false, \ 2992 "Trace deoptimization") \ 2993 \ 2994 develop(bool, DebugDeoptimization, false, \ 2995 "Tracing various information while debugging deoptimization") \ 2996 \ 2997 product(intx, SelfDestructTimer, 0, \ 2998 "Will cause VM to terminate after a given time (in minutes) " \ 2999 "(0 means off)") \ 3000 \ 3001 product(intx, MaxJavaStackTraceDepth, 1024, \ 3002 "Max. no. of lines in the stack trace for Java exceptions " \ 3003 "(0 means all)") \ 3004 \ 3005 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3006 "Guarantee a safepoint (at least) every so many milliseconds " \ 3007 "(0 means none)")) \ 3008 \ 3009 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3010 "Guarantee a safepoint (at least) every so many milliseconds " \ 3011 "(0 means none)")) \ 3012 \ 3013 product(intx, SafepointTimeoutDelay, 10000, \ 3014 "Delay in milliseconds for option SafepointTimeout") \ 3015 \ 3016 product(intx, NmethodSweepFraction, 16, \ 3017 "Number of invocations of sweeper to cover all nmethods") \ 3018 \ 3019 product(intx, NmethodSweepCheckInterval, 5, \ 3020 "Compilers wake up every n seconds to possibly sweep nmethods") \ 3021 \ 3022 notproduct(bool, LogSweeper, false, \ 3023 "Keep a ring buffer of sweeper activity") \ 3024 \ 3025 notproduct(intx, SweeperLogEntries, 1024, \ 3026 "Number of records in the ring buffer of sweeper activity") \ 3027 \ 3028 notproduct(intx, MemProfilingInterval, 500, \ 3029 "Time between each invocation of the MemProfiler") \ 3030 \ 3031 develop(intx, MallocCatchPtr, -1, \ 3032 "Hit breakpoint when mallocing/freeing this pointer") \ 3033 \ 3034 notproduct(intx, AssertRepeat, 1, \ 3035 "number of times to evaluate expression in assert " \ 3036 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 3037 \ 3038 notproduct(ccstrlist, SuppressErrorAt, "", \ 3039 "List of assertions (file:line) to muzzle") \ 3040 \ 3041 notproduct(uintx, HandleAllocationLimit, 1024, \ 3042 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3043 "is used") \ 3044 \ 3045 develop(uintx, TotalHandleAllocationLimit, 1024, \ 3046 "Threshold for total handle allocation when " \ 3047 "+TraceHandleAllocation is used") \ 3048 \ 3049 develop(intx, StackPrintLimit, 100, \ 3050 "number of stack frames to print in VM-level stack dump") \ 3051 \ 3052 notproduct(intx, MaxElementPrintSize, 256, \ 3053 "maximum number of elements to print") \ 3054 \ 3055 notproduct(intx, MaxSubklassPrintSize, 4, \ 3056 "maximum number of subklasses to print when printing klass") \ 3057 \ 3058 product(intx, MaxInlineLevel, 9, \ 3059 "maximum number of nested calls that are inlined") \ 3060 \ 3061 product(intx, MaxRecursiveInlineLevel, 1, \ 3062 "maximum number of nested recursive calls that are inlined") \ 3063 \ 3064 product_pd(intx, InlineSmallCode, \ 3065 "Only inline already compiled methods if their code size is " \ 3066 "less than this") \ 3067 \ 3068 product(intx, MaxInlineSize, 35, \ 3069 "maximum bytecode size of a method to be inlined") \ 3070 \ 3071 product_pd(intx, FreqInlineSize, \ 3072 "maximum bytecode size of a frequent method to be inlined") \ 3073 \ 3074 product(intx, MaxTrivialSize, 6, \ 3075 "maximum bytecode size of a trivial method to be inlined") \ 3076 \ 3077 product(intx, MinInliningThreshold, 250, \ 3078 "min. invocation count a method needs to have to be inlined") \ 3079 \ 3080 develop(intx, AlignEntryCode, 4, \ 3081 "aligns entry code to specified value (in bytes)") \ 3082 \ 3083 develop(intx, MethodHistogramCutoff, 100, \ 3084 "cutoff value for method invoc. histogram (+CountCalls)") \ 3085 \ 3086 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3087 "# of interpreted methods to show in profile") \ 3088 \ 3089 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3090 "# of compiled methods to show in profile") \ 3091 \ 3092 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3093 "# of stub methods to show in profile") \ 3094 \ 3095 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3096 "# of runtime stub nodes to show in profile") \ 3097 \ 3098 product(intx, ProfileIntervalsTicks, 100, \ 3099 "# of ticks between printing of interval profile " \ 3100 "(+ProfileIntervals)") \ 3101 \ 3102 notproduct(intx, ScavengeALotInterval, 1, \ 3103 "Interval between which scavenge will occur with +ScavengeALot") \ 3104 \ 3105 notproduct(intx, FullGCALotInterval, 1, \ 3106 "Interval between which full gc will occur with +FullGCALot") \ 3107 \ 3108 notproduct(intx, FullGCALotStart, 0, \ 3109 "For which invocation to start FullGCAlot") \ 3110 \ 3111 notproduct(intx, FullGCALotDummies, 32*K, \ 3112 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3113 "to move") \ 3114 \ 3115 develop(intx, DontYieldALotInterval, 10, \ 3116 "Interval between which yields will be dropped (milliseconds)") \ 3117 \ 3118 develop(intx, MinSleepInterval, 1, \ 3119 "Minimum sleep() interval (milliseconds) when " \ 3120 "ConvertSleepToYield is off (used for SOLARIS)") \ 3121 \ 3122 product(intx, EventLogLength, 2000, \ 3123 "maximum nof events in event log") \ 3124 \ 3125 develop(intx, ProfilerPCTickThreshold, 15, \ 3126 "Number of ticks in a PC buckets to be a hotspot") \ 3127 \ 3128 notproduct(intx, DeoptimizeALotInterval, 5, \ 3129 "Number of exits until DeoptimizeALot kicks in") \ 3130 \ 3131 notproduct(intx, ZombieALotInterval, 5, \ 3132 "Number of exits until ZombieALot kicks in") \ 3133 \ 3134 develop(bool, StressNonEntrant, false, \ 3135 "Mark nmethods non-entrant at registration") \ 3136 \ 3137 diagnostic(intx, MallocVerifyInterval, 0, \ 3138 "if non-zero, verify C heap after every N calls to " \ 3139 "malloc/realloc/free") \ 3140 \ 3141 diagnostic(intx, MallocVerifyStart, 0, \ 3142 "if non-zero, start verifying C heap after Nth call to " \ 3143 "malloc/realloc/free") \ 3144 \ 3145 product(intx, TypeProfileWidth, 2, \ 3146 "number of receiver types to record in call/cast profile") \ 3147 \ 3148 develop(intx, BciProfileWidth, 2, \ 3149 "number of return bci's to record in ret profile") \ 3150 \ 3151 product(intx, PerMethodRecompilationCutoff, 400, \ 3152 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3153 \ 3154 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3155 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3156 \ 3157 product(intx, PerMethodTrapLimit, 100, \ 3158 "Limit on traps (of one kind) in a method (includes inlines)") \ 3159 \ 3160 product(intx, PerBytecodeTrapLimit, 4, \ 3161 "Limit on traps (of one kind) at a particular BCI") \ 3162 \ 3163 develop(intx, FreqCountInvocations, 1, \ 3164 "Scaling factor for branch frequencies (deprecated)") \ 3165 \ 3166 develop(intx, InlineFrequencyRatio, 20, \ 3167 "Ratio of call site execution to caller method invocation") \ 3168 \ 3169 develop_pd(intx, InlineFrequencyCount, \ 3170 "Count of call site execution necessary to trigger frequent " \ 3171 "inlining") \ 3172 \ 3173 develop(intx, InlineThrowCount, 50, \ 3174 "Force inlining of interpreted methods that throw this often") \ 3175 \ 3176 develop(intx, InlineThrowMaxSize, 200, \ 3177 "Force inlining of throwing methods smaller than this") \ 3178 \ 3179 product(intx, AliasLevel, 3, \ 3180 "0 for no aliasing, 1 for oop/field/static/array split, " \ 3181 "2 for class split, 3 for unique instances") \ 3182 \ 3183 develop(bool, VerifyAliases, false, \ 3184 "perform extra checks on the results of alias analysis") \ 3185 \ 3186 develop(intx, ProfilerNodeSize, 1024, \ 3187 "Size in K to allocate for the Profile Nodes of each thread") \ 3188 \ 3189 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 3190 "Number of times to spin wait on a v8 atomic operation lock") \ 3191 \ 3192 product(intx, ReadSpinIterations, 100, \ 3193 "Number of read attempts before a yield (spin inner loop)") \ 3194 \ 3195 product_pd(intx, PreInflateSpin, \ 3196 "Number of times to spin wait before inflation") \ 3197 \ 3198 product(intx, PreBlockSpin, 10, \ 3199 "Number of times to spin in an inflated lock before going to " \ 3200 "an OS lock") \ 3201 \ 3202 /* gc parameters */ \ 3203 product(uintx, InitialHeapSize, 0, \ 3204 "Initial heap size (in bytes); zero means OldSize + NewSize") \ 3205 \ 3206 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 3207 "Maximum heap size (in bytes)") \ 3208 \ 3209 product(uintx, OldSize, ScaleForWordSize(4*M), \ 3210 "Initial tenured generation size (in bytes)") \ 3211 \ 3212 product(uintx, NewSize, ScaleForWordSize(1*M), \ 3213 "Initial new generation size (in bytes)") \ 3214 \ 3215 product(uintx, MaxNewSize, max_uintx, \ 3216 "Maximum new generation size (in bytes), max_uintx means set " \ 3217 "ergonomically") \ 3218 \ 3219 product(uintx, PretenureSizeThreshold, 0, \ 3220 "Maximum size in bytes of objects allocated in DefNew " \ 3221 "generation; zero means no maximum") \ 3222 \ 3223 product(uintx, TLABSize, 0, \ 3224 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3225 \ 3226 product(uintx, MinTLABSize, 2*K, \ 3227 "Minimum allowed TLAB size (in bytes)") \ 3228 \ 3229 product(uintx, TLABAllocationWeight, 35, \ 3230 "Allocation averaging weight") \ 3231 \ 3232 product(uintx, TLABWasteTargetPercent, 1, \ 3233 "Percentage of Eden that can be wasted") \ 3234 \ 3235 product(uintx, TLABRefillWasteFraction, 64, \ 3236 "Max TLAB waste at a refill (internal fragmentation)") \ 3237 \ 3238 product(uintx, TLABWasteIncrement, 4, \ 3239 "Increment allowed waste at slow allocation") \ 3240 \ 3241 product(intx, SurvivorRatio, 8, \ 3242 "Ratio of eden/survivor space size") \ 3243 \ 3244 product(intx, NewRatio, 2, \ 3245 "Ratio of new/old generation sizes") \ 3246 \ 3247 product_pd(uintx, NewSizeThreadIncrease, \ 3248 "Additional size added to desired new generation size per " \ 3249 "non-daemon thread (in bytes)") \ 3250 \ 3251 product_pd(uintx, PermSize, \ 3252 "Initial size of permanent generation (in bytes)") \ 3253 \ 3254 product_pd(uintx, MaxPermSize, \ 3255 "Maximum size of permanent generation (in bytes)") \ 3256 \ 3257 product(uintx, MinHeapFreeRatio, 40, \ 3258 "Min percentage of heap free after GC to avoid expansion") \ 3259 \ 3260 product(uintx, MaxHeapFreeRatio, 70, \ 3261 "Max percentage of heap free after GC to avoid shrinking") \ 3262 \ 3263 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3264 "Number of milliseconds per MB of free space in the heap") \ 3265 \ 3266 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3267 "Min change in heap space due to GC (in bytes)") \ 3268 \ 3269 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 3270 "Min expansion of permanent heap (in bytes)") \ 3271 \ 3272 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 3273 "Max expansion of permanent heap without full GC (in bytes)") \ 3274 \ 3275 product(intx, QueuedAllocationWarningCount, 0, \ 3276 "Number of times an allocation that queues behind a GC " \ 3277 "will retry before printing a warning") \ 3278 \ 3279 diagnostic(uintx, VerifyGCStartAt, 0, \ 3280 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3281 \ 3282 diagnostic(intx, VerifyGCLevel, 0, \ 3283 "Generation level at which to start +VerifyBefore/AfterGC") \ 3284 \ 3285 product(intx, MaxTenuringThreshold, 15, \ 3286 "Maximum value for tenuring threshold") \ 3287 \ 3288 product(intx, InitialTenuringThreshold, 7, \ 3289 "Initial value for tenuring threshold") \ 3290 \ 3291 product(intx, TargetSurvivorRatio, 50, \ 3292 "Desired percentage of survivor space used after scavenge") \ 3293 \ 3294 product(uintx, MarkSweepDeadRatio, 5, \ 3295 "Percentage (0-100) of the old gen allowed as dead wood." \ 3296 "Serial mark sweep treats this as both the min and max value." \ 3297 "CMS uses this value only if it falls back to mark sweep." \ 3298 "Par compact uses a variable scale based on the density of the" \ 3299 "generation and treats this as the max value when the heap is" \ 3300 "either completely full or completely empty. Par compact also" \ 3301 "has a smaller default value; see arguments.cpp.") \ 3302 \ 3303 product(uintx, PermMarkSweepDeadRatio, 20, \ 3304 "Percentage (0-100) of the perm gen allowed as dead wood." \ 3305 "See MarkSweepDeadRatio for collector-specific comments.") \ 3306 \ 3307 product(intx, MarkSweepAlwaysCompactCount, 4, \ 3308 "How often should we fully compact the heap (ignoring the dead " \ 3309 "space parameters)") \ 3310 \ 3311 product(intx, PrintCMSStatistics, 0, \ 3312 "Statistics for CMS") \ 3313 \ 3314 product(bool, PrintCMSInitiationStatistics, false, \ 3315 "Statistics for initiating a CMS collection") \ 3316 \ 3317 product(intx, PrintFLSStatistics, 0, \ 3318 "Statistics for CMS' FreeListSpace") \ 3319 \ 3320 product(intx, PrintFLSCensus, 0, \ 3321 "Census for CMS' FreeListSpace") \ 3322 \ 3323 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3324 "Delay in ms between expansion and allocation") \ 3325 \ 3326 product(intx, DeferThrSuspendLoopCount, 4000, \ 3327 "(Unstable) Number of times to iterate in safepoint loop " \ 3328 " before blocking VM threads ") \ 3329 \ 3330 product(intx, DeferPollingPageLoopCount, -1, \ 3331 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3332 "before changing safepoint polling page to RO ") \ 3333 \ 3334 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3335 \ 3336 product(bool, PSChunkLargeArrays, true, \ 3337 "true: process large arrays in chunks") \ 3338 \ 3339 product(uintx, GCDrainStackTargetSize, 64, \ 3340 "how many entries we'll try to leave on the stack during " \ 3341 "parallel GC") \ 3342 \ 3343 /* stack parameters */ \ 3344 product_pd(intx, StackYellowPages, \ 3345 "Number of yellow zone (recoverable overflows) pages") \ 3346 \ 3347 product_pd(intx, StackRedPages, \ 3348 "Number of red zone (unrecoverable overflows) pages") \ 3349 \ 3350 product_pd(intx, StackShadowPages, \ 3351 "Number of shadow zone (for overflow checking) pages" \ 3352 " this should exceed the depth of the VM and native call stack") \ 3353 \ 3354 product_pd(intx, ThreadStackSize, \ 3355 "Thread Stack Size (in Kbytes)") \ 3356 \ 3357 product_pd(intx, VMThreadStackSize, \ 3358 "Non-Java Thread Stack Size (in Kbytes)") \ 3359 \ 3360 product_pd(intx, CompilerThreadStackSize, \ 3361 "Compiler Thread Stack Size (in Kbytes)") \ 3362 \ 3363 develop_pd(uintx, JVMInvokeMethodSlack, \ 3364 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3365 \ 3366 product(uintx, ThreadSafetyMargin, 50*M, \ 3367 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3368 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3369 "disable this feature") \ 3370 \ 3371 /* code cache parameters */ \ 3372 develop(uintx, CodeCacheSegmentSize, 64, \ 3373 "Code cache segment size (in bytes) - smallest unit of " \ 3374 "allocation") \ 3375 \ 3376 develop_pd(intx, CodeEntryAlignment, \ 3377 "Code entry alignment for generated code (in bytes)") \ 3378 \ 3379 product_pd(intx, OptoLoopAlignment, \ 3380 "Align inner loops to zero relative to this modulus") \ 3381 \ 3382 product_pd(uintx, InitialCodeCacheSize, \ 3383 "Initial code cache size (in bytes)") \ 3384 \ 3385 product_pd(uintx, ReservedCodeCacheSize, \ 3386 "Reserved code cache size (in bytes) - maximum code cache size") \ 3387 \ 3388 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3389 "When less than X space left, we stop compiling.") \ 3390 \ 3391 product_pd(uintx, CodeCacheExpansionSize, \ 3392 "Code cache expansion size (in bytes)") \ 3393 \ 3394 develop_pd(uintx, CodeCacheMinBlockLength, \ 3395 "Minimum number of segments in a code cache block.") \ 3396 \ 3397 notproduct(bool, ExitOnFullCodeCache, false, \ 3398 "Exit the VM if we fill the code cache.") \ 3399 \ 3400 product(bool, UseCodeCacheFlushing, true, \ 3401 "Attempt to clean the code cache before shutting off compiler") \ 3402 \ 3403 product(intx, MinCodeCacheFlushingInterval, 30, \ 3404 "Min number of seconds between code cache cleaning sessions") \ 3405 \ 3406 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3407 "When less than X space left, start code cache cleaning") \ 3408 \ 3409 /* interpreter debugging */ \ 3410 develop(intx, BinarySwitchThreshold, 5, \ 3411 "Minimal number of lookupswitch entries for rewriting to binary " \ 3412 "switch") \ 3413 \ 3414 develop(intx, StopInterpreterAt, 0, \ 3415 "Stops interpreter execution at specified bytecode number") \ 3416 \ 3417 develop(intx, TraceBytecodesAt, 0, \ 3418 "Traces bytecodes starting with specified bytecode number") \ 3419 \ 3420 /* compiler interface */ \ 3421 develop(intx, CIStart, 0, \ 3422 "the id of the first compilation to permit") \ 3423 \ 3424 develop(intx, CIStop, -1, \ 3425 "the id of the last compilation to permit") \ 3426 \ 3427 develop(intx, CIStartOSR, 0, \ 3428 "the id of the first osr compilation to permit " \ 3429 "(CICountOSR must be on)") \ 3430 \ 3431 develop(intx, CIStopOSR, -1, \ 3432 "the id of the last osr compilation to permit " \ 3433 "(CICountOSR must be on)") \ 3434 \ 3435 develop(intx, CIBreakAtOSR, -1, \ 3436 "id of osr compilation to break at") \ 3437 \ 3438 develop(intx, CIBreakAt, -1, \ 3439 "id of compilation to break at") \ 3440 \ 3441 product(ccstrlist, CompileOnly, "", \ 3442 "List of methods (pkg/class.name) to restrict compilation to") \ 3443 \ 3444 product(ccstr, CompileCommandFile, NULL, \ 3445 "Read compiler commands from this file [.hotspot_compiler]") \ 3446 \ 3447 product(ccstrlist, CompileCommand, "", \ 3448 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3449 \ 3450 product(bool, CICompilerCountPerCPU, false, \ 3451 "1 compiler thread for log(N CPUs)") \ 3452 \ 3453 develop(intx, CIFireOOMAt, -1, \ 3454 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3455 "(non-negative value throws OOM after this many CI accesses " \ 3456 "in each compile)") \ 3457 \ 3458 develop(intx, CIFireOOMAtDelay, -1, \ 3459 "Wait for this many CI accesses to occur in all compiles before " \ 3460 "beginning to throw OutOfMemoryErrors in each compile") \ 3461 \ 3462 notproduct(bool, CIObjectFactoryVerify, false, \ 3463 "enable potentially expensive verification in ciObjectFactory") \ 3464 \ 3465 /* Priorities */ \ 3466 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3467 \ 3468 product(intx, ThreadPriorityPolicy, 0, \ 3469 "0 : Normal. "\ 3470 " VM chooses priorities that are appropriate for normal "\ 3471 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3472 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3473 " map to lower native priority values. On Windows applications"\ 3474 " are allowed to use higher native priorities. However, with "\ 3475 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3476 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3477 " interfere with system threads. On Linux thread priorities "\ 3478 " are ignored because the OS does not support static priority "\ 3479 " in SCHED_OTHER scheduling class which is the only choice for"\ 3480 " non-root, non-realtime applications. "\ 3481 "1 : Aggressive. "\ 3482 " Java thread priorities map over to the entire range of "\ 3483 " native thread priorities. Higher Java thread priorities map "\ 3484 " to higher native thread priorities. This policy should be "\ 3485 " used with care, as sometimes it can cause performance "\ 3486 " degradation in the application and/or the entire system. On "\ 3487 " Linux this policy requires root privilege.") \ 3488 \ 3489 product(bool, ThreadPriorityVerbose, false, \ 3490 "Print priority changes") \ 3491 \ 3492 product(intx, DefaultThreadPriority, -1, \ 3493 "The native priority at which threads run if not elsewhere " \ 3494 "specified (-1 means no change)") \ 3495 \ 3496 product(intx, CompilerThreadPriority, -1, \ 3497 "The native priority at which compiler threads should run " \ 3498 "(-1 means no change)") \ 3499 \ 3500 product(intx, VMThreadPriority, -1, \ 3501 "The native priority at which the VM thread should run " \ 3502 "(-1 means no change)") \ 3503 \ 3504 product(bool, CompilerThreadHintNoPreempt, true, \ 3505 "(Solaris only) Give compiler threads an extra quanta") \ 3506 \ 3507 product(bool, VMThreadHintNoPreempt, false, \ 3508 "(Solaris only) Give VM thread an extra quanta") \ 3509 \ 3510 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3511 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3512 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3513 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3514 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3515 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3516 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3517 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3518 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3519 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3520 \ 3521 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3522 "Java thread priority 10 maps to critical scheduling priority") \ 3523 \ 3524 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3525 "Compiler thread(s) run at critical scheduling priority") \ 3526 \ 3527 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3528 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3529 \ 3530 /* compiler debugging */ \ 3531 notproduct(intx, CompileTheWorldStartAt, 1, \ 3532 "First class to consider when using +CompileTheWorld") \ 3533 \ 3534 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3535 "Last class to consider when using +CompileTheWorld") \ 3536 \ 3537 develop(intx, NewCodeParameter, 0, \ 3538 "Testing Only: Create a dedicated integer parameter before " \ 3539 "putback") \ 3540 \ 3541 /* new oopmap storage allocation */ \ 3542 develop(intx, MinOopMapAllocation, 8, \ 3543 "Minimum number of OopMap entries in an OopMapSet") \ 3544 \ 3545 /* Background Compilation */ \ 3546 develop(intx, LongCompileThreshold, 50, \ 3547 "Used with +TraceLongCompiles") \ 3548 \ 3549 product(intx, StarvationMonitorInterval, 200, \ 3550 "Pause between each check in ms") \ 3551 \ 3552 /* recompilation */ \ 3553 product_pd(intx, CompileThreshold, \ 3554 "number of interpreted method invocations before (re-)compiling") \ 3555 \ 3556 product_pd(intx, BackEdgeThreshold, \ 3557 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3558 \ 3559 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3560 "Interpreter (tier 0) invocation notification frequency.") \ 3561 \ 3562 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3563 "C1 without MDO (tier 2) invocation notification frequency.") \ 3564 \ 3565 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3566 "C1 with MDO profiling (tier 3) invocation notification " \ 3567 "frequency.") \ 3568 \ 3569 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3570 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3571 \ 3572 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3573 "Interpreter (tier 0) invocation notification frequency.") \ 3574 \ 3575 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3576 "C1 without MDO (tier 2) invocation notification frequency.") \ 3577 \ 3578 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3579 "C1 with MDO profiling (tier 3) invocation notification " \ 3580 "frequency.") \ 3581 \ 3582 product(intx, Tier2CompileThreshold, 0, \ 3583 "threshold at which tier 2 compilation is invoked") \ 3584 \ 3585 product(intx, Tier2BackEdgeThreshold, 0, \ 3586 "Back edge threshold at which tier 2 compilation is invoked") \ 3587 \ 3588 product(intx, Tier3InvocationThreshold, 200, \ 3589 "Compile if number of method invocations crosses this " \ 3590 "threshold") \ 3591 \ 3592 product(intx, Tier3MinInvocationThreshold, 100, \ 3593 "Minimum invocation to compile at tier 3") \ 3594 \ 3595 product(intx, Tier3CompileThreshold, 2000, \ 3596 "Threshold at which tier 3 compilation is invoked (invocation " \ 3597 "minimum must be satisfied.") \ 3598 \ 3599 product(intx, Tier3BackEdgeThreshold, 60000, \ 3600 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3601 \ 3602 product(intx, Tier4InvocationThreshold, 5000, \ 3603 "Compile if number of method invocations crosses this " \ 3604 "threshold") \ 3605 \ 3606 product(intx, Tier4MinInvocationThreshold, 600, \ 3607 "Minimum invocation to compile at tier 4") \ 3608 \ 3609 product(intx, Tier4CompileThreshold, 15000, \ 3610 "Threshold at which tier 4 compilation is invoked (invocation " \ 3611 "minimum must be satisfied.") \ 3612 \ 3613 product(intx, Tier4BackEdgeThreshold, 40000, \ 3614 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3615 \ 3616 product(intx, Tier3DelayOn, 5, \ 3617 "If C2 queue size grows over this amount per compiler thread " \ 3618 "stop compiling at tier 3 and start compiling at tier 2") \ 3619 \ 3620 product(intx, Tier3DelayOff, 2, \ 3621 "If C2 queue size is less than this amount per compiler thread " \ 3622 "allow methods compiled at tier 2 transition to tier 3") \ 3623 \ 3624 product(intx, Tier3LoadFeedback, 5, \ 3625 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3626 "reaches this amount per compiler thread") \ 3627 \ 3628 product(intx, Tier4LoadFeedback, 3, \ 3629 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3630 "reaches this amount per compiler thread") \ 3631 \ 3632 product(intx, TieredCompileTaskTimeout, 50, \ 3633 "Kill compile task if method was not used within " \ 3634 "given timeout in milliseconds") \ 3635 \ 3636 product(intx, TieredStopAtLevel, 4, \ 3637 "Stop at given compilation level") \ 3638 \ 3639 product(intx, Tier0ProfilingStartPercentage, 200, \ 3640 "Start profiling in interpreter if the counters exceed tier 3" \ 3641 "thresholds by the specified percentage") \ 3642 \ 3643 product(intx, TieredRateUpdateMinTime, 1, \ 3644 "Minimum rate sampling interval (in milliseconds)") \ 3645 \ 3646 product(intx, TieredRateUpdateMaxTime, 25, \ 3647 "Maximum rate sampling interval (in milliseconds)") \ 3648 \ 3649 product_pd(bool, TieredCompilation, \ 3650 "Enable tiered compilation") \ 3651 \ 3652 product(bool, PrintTieredEvents, false, \ 3653 "Print tiered events notifications") \ 3654 \ 3655 product(bool, StressTieredRuntime, false, \ 3656 "Alternate client and server compiler on compile requests") \ 3657 \ 3658 product_pd(intx, OnStackReplacePercentage, \ 3659 "NON_TIERED number of method invocations/branches (expressed as %"\ 3660 "of CompileThreshold) before (re-)compiling OSR code") \ 3661 \ 3662 product(intx, InterpreterProfilePercentage, 33, \ 3663 "NON_TIERED number of method invocations/branches (expressed as %"\ 3664 "of CompileThreshold) before profiling in the interpreter") \ 3665 \ 3666 develop(intx, MaxRecompilationSearchLength, 10, \ 3667 "max. # frames to inspect searching for recompilee") \ 3668 \ 3669 develop(intx, MaxInterpretedSearchLength, 3, \ 3670 "max. # interp. frames to skip when searching for recompilee") \ 3671 \ 3672 develop(intx, DesiredMethodLimit, 8000, \ 3673 "desired max. method size (in bytecodes) after inlining") \ 3674 \ 3675 develop(intx, HugeMethodLimit, 8000, \ 3676 "don't compile methods larger than this if " \ 3677 "+DontCompileHugeMethods") \ 3678 \ 3679 /* New JDK 1.4 reflection implementation */ \ 3680 \ 3681 develop(bool, UseNewReflection, true, \ 3682 "Temporary flag for transition to reflection based on dynamic " \ 3683 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3684 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3685 "changes were needed") \ 3686 \ 3687 develop(bool, VerifyReflectionBytecodes, false, \ 3688 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3689 "in situations like that described in 4486457 or for " \ 3690 "constructors generated for serialization, so can not be enabled "\ 3691 "in product.") \ 3692 \ 3693 product(bool, ReflectionWrapResolutionErrors, true, \ 3694 "Temporary flag for transition to AbstractMethodError wrapped " \ 3695 "in InvocationTargetException. See 6531596") \ 3696 \ 3697 \ 3698 develop(intx, FastSuperclassLimit, 8, \ 3699 "Depth of hardwired instanceof accelerator array") \ 3700 \ 3701 /* Properties for Java libraries */ \ 3702 \ 3703 product(intx, MaxDirectMemorySize, -1, \ 3704 "Maximum total size of NIO direct-buffer allocations") \ 3705 \ 3706 /* temporary developer defined flags */ \ 3707 \ 3708 diagnostic(bool, UseNewCode, false, \ 3709 "Testing Only: Use the new version while testing") \ 3710 \ 3711 diagnostic(bool, UseNewCode2, false, \ 3712 "Testing Only: Use the new version while testing") \ 3713 \ 3714 diagnostic(bool, UseNewCode3, false, \ 3715 "Testing Only: Use the new version while testing") \ 3716 \ 3717 /* flags for performance data collection */ \ 3718 \ 3719 product(bool, UsePerfData, falseInEmbedded, \ 3720 "Flag to disable jvmstat instrumentation for performance testing" \ 3721 "and problem isolation purposes.") \ 3722 \ 3723 product(bool, PerfDataSaveToFile, false, \ 3724 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3725 \ 3726 product(ccstr, PerfDataSaveFile, NULL, \ 3727 "Save PerfData memory to the specified absolute pathname," \ 3728 "%p in the file name if present will be replaced by pid") \ 3729 \ 3730 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3731 "Data sampling interval in milliseconds") \ 3732 \ 3733 develop(bool, PerfTraceDataCreation, false, \ 3734 "Trace creation of Performance Data Entries") \ 3735 \ 3736 develop(bool, PerfTraceMemOps, false, \ 3737 "Trace PerfMemory create/attach/detach calls") \ 3738 \ 3739 product(bool, PerfDisableSharedMem, false, \ 3740 "Store performance data in standard memory") \ 3741 \ 3742 product(intx, PerfDataMemorySize, 32*K, \ 3743 "Size of performance data memory region. Will be rounded " \ 3744 "up to a multiple of the native os page size.") \ 3745 \ 3746 product(intx, PerfMaxStringConstLength, 1024, \ 3747 "Maximum PerfStringConstant string length before truncation") \ 3748 \ 3749 product(bool, PerfAllowAtExitRegistration, false, \ 3750 "Allow registration of atexit() methods") \ 3751 \ 3752 product(bool, PerfBypassFileSystemCheck, false, \ 3753 "Bypass Win32 file system criteria checks (Windows Only)") \ 3754 \ 3755 product(intx, UnguardOnExecutionViolation, 0, \ 3756 "Unguard page and retry on no-execute fault (Win32 only)" \ 3757 "0=off, 1=conservative, 2=aggressive") \ 3758 \ 3759 /* Serviceability Support */ \ 3760 \ 3761 product(bool, ManagementServer, false, \ 3762 "Create JMX Management Server") \ 3763 \ 3764 product(bool, DisableAttachMechanism, false, \ 3765 "Disable mechanism that allows tools to attach to this VM") \ 3766 \ 3767 product(bool, StartAttachListener, false, \ 3768 "Always start Attach Listener at VM startup") \ 3769 \ 3770 manageable(bool, PrintConcurrentLocks, false, \ 3771 "Print java.util.concurrent locks in thread dump") \ 3772 \ 3773 product(bool, TransmitErrorReport, false, \ 3774 "Enable error report transmission on erroneous termination") \ 3775 \ 3776 product(ccstr, ErrorReportServer, NULL, \ 3777 "Override built-in error report server address") \ 3778 \ 3779 /* Shared spaces */ \ 3780 \ 3781 product(bool, UseSharedSpaces, true, \ 3782 "Use shared spaces in the permanent generation") \ 3783 \ 3784 product(bool, RequireSharedSpaces, false, \ 3785 "Require shared spaces in the permanent generation") \ 3786 \ 3787 product(bool, DumpSharedSpaces, false, \ 3788 "Special mode: JVM reads a class list, loads classes, builds " \ 3789 "shared spaces, and dumps the shared spaces to a file to be " \ 3790 "used in future JVM runs.") \ 3791 \ 3792 product(bool, PrintSharedSpaces, false, \ 3793 "Print usage of shared spaces") \ 3794 \ 3795 product(uintx, SharedDummyBlockSize, 512*M, \ 3796 "Size of dummy block used to shift heap addresses (in bytes)") \ 3797 \ 3798 product(uintx, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(13*M), \ 3799 "Size of read-write space in permanent generation (in bytes)") \ 3800 \ 3801 product(uintx, SharedReadOnlySize, 10*M, \ 3802 "Size of read-only space in permanent generation (in bytes)") \ 3803 \ 3804 product(uintx, SharedMiscDataSize, NOT_LP64(4*M) LP64_ONLY(5*M) NOT_PRODUCT(+1*M), \ 3805 "Size of the shared data area adjacent to the heap (in bytes)") \ 3806 \ 3807 product(uintx, SharedMiscCodeSize, 4*M, \ 3808 "Size of the shared code area adjacent to the heap (in bytes)") \ 3809 \ 3810 diagnostic(bool, SharedOptimizeColdStart, true, \ 3811 "At dump time, order shared objects to achieve better " \ 3812 "cold startup time.") \ 3813 \ 3814 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3815 "Reordering policy for SharedOptimizeColdStart " \ 3816 "0=favor classload-time locality, 1=balanced, " \ 3817 "2=favor runtime locality") \ 3818 \ 3819 diagnostic(bool, SharedSkipVerify, false, \ 3820 "Skip assert() and verify() which page-in unwanted shared " \ 3821 "objects. ") \ 3822 \ 3823 diagnostic(bool, EnableInvokeDynamic, true, \ 3824 "support JSR 292 (method handles, invokedynamic, " \ 3825 "anonymous classes") \ 3826 \ 3827 product(bool, AnonymousClasses, false, \ 3828 "support sun.misc.Unsafe.defineAnonymousClass (deprecated)") \ 3829 \ 3830 experimental(bool, EnableMethodHandles, false, \ 3831 "support method handles (deprecated)") \ 3832 \ 3833 diagnostic(intx, MethodHandlePushLimit, 3, \ 3834 "number of additional stack slots a method handle may push") \ 3835 \ 3836 diagnostic(bool, PrintMethodHandleStubs, false, \ 3837 "Print generated stub code for method handles") \ 3838 \ 3839 develop(bool, TraceMethodHandles, false, \ 3840 "trace internal method handle operations") \ 3841 \ 3842 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3843 "perform extra checks when constructing method handles") \ 3844 \ 3845 diagnostic(bool, OptimizeMethodHandles, true, \ 3846 "when constructing method handles, try to improve them") \ 3847 \ 3848 develop(bool, StressMethodHandleWalk, false, \ 3849 "Process all method handles with MethodHandleWalk") \ 3850 \ 3851 experimental(bool, TrustFinalNonStaticFields, false, \ 3852 "trust final non-static declarations for constant folding") \ 3853 \ 3854 experimental(bool, AllowInvokeGeneric, false, \ 3855 "accept MethodHandle.invoke and MethodHandle.invokeGeneric " \ 3856 "as equivalent methods") \ 3857 \ 3858 develop(bool, TraceInvokeDynamic, false, \ 3859 "trace internal invoke dynamic operations") \ 3860 \ 3861 diagnostic(bool, PauseAtStartup, false, \ 3862 "Causes the VM to pause at startup time and wait for the pause " \ 3863 "file to be removed (default: ./vm.paused.<pid>)") \ 3864 \ 3865 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3866 "The file to create and for whose removal to await when pausing " \ 3867 "at startup. (default: ./vm.paused.<pid>)") \ 3868 \ 3869 diagnostic(bool, PauseAtExit, false, \ 3870 "Pause and wait for keypress on exit if a debugger is attached") \ 3871 \ 3872 product(bool, ExtendedDTraceProbes, false, \ 3873 "Enable performance-impacting dtrace probes") \ 3874 \ 3875 product(bool, DTraceMethodProbes, false, \ 3876 "Enable dtrace probes for method-entry and method-exit") \ 3877 \ 3878 product(bool, DTraceAllocProbes, false, \ 3879 "Enable dtrace probes for object allocation") \ 3880 \ 3881 product(bool, DTraceMonitorProbes, false, \ 3882 "Enable dtrace probes for monitor events") \ 3883 \ 3884 product(bool, RelaxAccessControlCheck, false, \ 3885 "Relax the access control checks in the verifier") \ 3886 \ 3887 diagnostic(bool, PrintDTraceDOF, false, \ 3888 "Print the DTrace DOF passed to the system for JSDT probes") \ 3889 \ 3890 product(uintx, StringTableSize, 1009, \ 3891 "Number of buckets in the interned String table") \ 3892 \ 3893 product(bool, UseVMInterruptibleIO, false, \ 3894 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3895 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3896 " of this flag is true for JDK 6 and earlier") \ 3897 \ 3898 diagnostic(bool, WhiteBoxAPI, false, \ 3899 "Enable internal testing APIs") \ 3900 \ 3901 product(bool, PrintGCCause, true, \ 3902 "Include GC cause in GC logging") 3903 3904/* 3905 * Macros for factoring of globals 3906 */ 3907 3908// Interface macros 3909#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3910#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3911#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3912#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3913#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3914#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3915#ifdef PRODUCT 3916#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3917#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3918#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3919#else 3920#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3921#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3922#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3923#endif 3924// Special LP64 flags, product only needed for now. 3925#ifdef _LP64 3926#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3927#else 3928#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3929#endif // _LP64 3930 3931// Implementation macros 3932#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3933#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3934#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3935#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3936#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3937#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3938#ifdef PRODUCT 3939#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3940#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3941#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3942#else 3943#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3944#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3945#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3946#endif 3947#ifdef _LP64 3948#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3949#else 3950#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3951#endif // _LP64 3952 3953RUNTIME_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) 3954 3955RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3956 3957// Extensions 3958 3959#include "runtime/globals_ext.hpp" 3960 3961#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 3962