globals.hpp revision 476:7b75310e57e2
1126288Smtm/* 298186Sgordon * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. 378344Sobrien * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 498186Sgordon * 578344Sobrien * This code is free software; you can redistribute it and/or modify it 678344Sobrien * under the terms of the GNU General Public License version 2 only, as 778344Sobrien * published by the Free Software Foundation. 878344Sobrien * 978344Sobrien * This code is distributed in the hope that it will be useful, but WITHOUT 1078344Sobrien * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1178344Sobrien * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1278344Sobrien * version 2 for more details (a copy is included in the LICENSE file that 1378344Sobrien * accompanied this code). 1478344Sobrien * 1578344Sobrien * You should have received a copy of the GNU General Public License version 1678344Sobrien * 2 along with this work; if not, write to the Free Software Foundation, 1778344Sobrien * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1878344Sobrien * 1978344Sobrien * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 2078344Sobrien * CA 95054 USA or visit www.sun.com if you need additional information or 2178344Sobrien * have any questions. 2278344Sobrien * 2378344Sobrien */ 2478344Sobrien 2578344Sobrien#if !defined(COMPILER1) && !defined(COMPILER2) 2678344Sobriendefine_pd_global(bool, BackgroundCompilation, false); 2778344Sobriendefine_pd_global(bool, UseTLAB, false); 2878344Sobriendefine_pd_global(bool, CICompileOSR, false); 2978344Sobriendefine_pd_global(bool, UseTypeProfile, false); 3078344Sobriendefine_pd_global(bool, UseOnStackReplacement, false); 3178344Sobriendefine_pd_global(bool, InlineIntrinsics, false); 3278344Sobriendefine_pd_global(bool, PreferInterpreterNativeStubs, true); 3378344Sobriendefine_pd_global(bool, ProfileInterpreter, false); 3478344Sobriendefine_pd_global(bool, ProfileTraps, false); 3578344Sobriendefine_pd_global(bool, TieredCompilation, false); 3678344Sobrien 3778344Sobriendefine_pd_global(intx, CompileThreshold, 0); 3878344Sobriendefine_pd_global(intx, Tier2CompileThreshold, 0); 3978344Sobriendefine_pd_global(intx, Tier3CompileThreshold, 0); 4078344Sobriendefine_pd_global(intx, Tier4CompileThreshold, 0); 4178344Sobrien 4278344Sobriendefine_pd_global(intx, BackEdgeThreshold, 0); 4398186Sgordondefine_pd_global(intx, Tier2BackEdgeThreshold, 0); 4498186Sgordondefine_pd_global(intx, Tier3BackEdgeThreshold, 0); 4598186Sgordondefine_pd_global(intx, Tier4BackEdgeThreshold, 0); 46131550Scperciva 47131550Scpercivadefine_pd_global(intx, OnStackReplacePercentage, 0); 48131550Scpercivadefine_pd_global(bool, ResizeTLAB, false); 49131550Scpercivadefine_pd_global(intx, FreqInlineSize, 0); 5098186Sgordondefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 5198186Sgordondefine_pd_global(intx, NewRatio, 4); 5298186Sgordondefine_pd_global(intx, InlineClassNatives, true); 53103018Sgordondefine_pd_global(intx, InlineUnsafeOps, true); 54124832Smtmdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 55124832Smtmdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 5698186Sgordondefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 57103018Sgordondefine_pd_global(intx, CodeCacheMinBlockLength, 1); 5898186Sgordondefine_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); 5998186Sgordondefine_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); 6098186Sgordondefine_pd_global(bool, NeverActAsServerClassMachine, true); 6198186Sgordondefine_pd_global(uintx, DefaultMaxRAM, 1*G); 6298186Sgordon#define CI_COMPILER_COUNT 0 6398186Sgordon#else 6498186Sgordon 6598186Sgordon#ifdef COMPILER2 6698186Sgordon#define CI_COMPILER_COUNT 2 6778344Sobrien#else 6878344Sobrien#define CI_COMPILER_COUNT 1 6978344Sobrien#endif // COMPILER2 7078344Sobrien 7198186Sgordon#endif // no compilers 7298186Sgordon 7398186Sgordon 7498186Sgordon// string type aliases used only in this file 7598186Sgordontypedef const char* ccstr; 7698186Sgordontypedef const char* ccstrlist; // represents string arguments which accumulate 7798186Sgordon 7898186Sgordonenum FlagValueOrigin { 7998186Sgordon DEFAULT = 0, 8098186Sgordon COMMAND_LINE = 1, 8198186Sgordon ENVIRON_VAR = 2, 8298186Sgordon CONFIG_FILE = 3, 8398186Sgordon MANAGEMENT = 4, 8498186Sgordon ERGONOMIC = 5, 8598186Sgordon ATTACH_ON_DEMAND = 6, 8698186Sgordon INTERNAL = 99 8798186Sgordon}; 88103018Sgordon 8998186Sgordonstruct Flag { 9098186Sgordon const char *type; 9198186Sgordon const char *name; 9298186Sgordon void* addr; 9398186Sgordon const char *kind; 9498186Sgordon FlagValueOrigin origin; 9598186Sgordon 9698186Sgordon // points to all Flags static array 9798186Sgordon static Flag *flags; 9898186Sgordon 9998186Sgordon // number of flags 10098186Sgordon static size_t numFlags; 10198186Sgordon 10298186Sgordon static Flag* find_flag(char* name, size_t length); 10398186Sgordon 10498186Sgordon bool is_bool() const { return strcmp(type, "bool") == 0; } 10598186Sgordon bool get_bool() const { return *((bool*) addr); } 10698186Sgordon void set_bool(bool value) { *((bool*) addr) = value; } 10798186Sgordon 10898186Sgordon bool is_intx() const { return strcmp(type, "intx") == 0; } 10998186Sgordon intx get_intx() const { return *((intx*) addr); } 11098186Sgordon void set_intx(intx value) { *((intx*) addr) = value; } 11198186Sgordon 11298186Sgordon bool is_uintx() const { return strcmp(type, "uintx") == 0; } 11398186Sgordon uintx get_uintx() const { return *((uintx*) addr); } 11498186Sgordon void set_uintx(uintx value) { *((uintx*) addr) = value; } 11598186Sgordon 11698186Sgordon bool is_double() const { return strcmp(type, "double") == 0; } 11798186Sgordon double get_double() const { return *((double*) addr); } 11898186Sgordon void set_double(double value) { *((double*) addr) = value; } 11998186Sgordon 12098186Sgordon bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 12178344Sobrien bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 12278344Sobrien ccstr get_ccstr() const { return *((ccstr*) addr); } 12378344Sobrien void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 12478344Sobrien 12578344Sobrien bool is_unlocker() const; 12678344Sobrien bool is_unlocked() const; 12778344Sobrien bool is_writeable() const; 12898186Sgordon bool is_external() const; 12978344Sobrien 13078344Sobrien void print_on(outputStream* st); 13178344Sobrien void print_as_flag(outputStream* st); 13278344Sobrien}; 13378344Sobrien 13478344Sobrien// debug flags control various aspects of the VM and are global accessible 13578344Sobrien 13678344Sobrien// use FlagSetting to temporarily change some debug flag 13778344Sobrien// e.g. FlagSetting fs(DebugThisAndThat, true); 13878344Sobrien// restored to previous value upon leaving scope 13978344Sobrienclass FlagSetting { 14078344Sobrien bool val; 141106643Sgordon bool* flag; 14278344Sobrien public: 14378344Sobrien FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 14478344Sobrien ~FlagSetting() { *flag = val; } 14578344Sobrien}; 14678344Sobrien 14798186Sgordon 14898186Sgordonclass CounterSetting { 14978344Sobrien intx* counter; 15098186Sgordon public: 15198186Sgordon CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 15298186Sgordon ~CounterSetting() { (*counter)--; } 153126286Smtm}; 15498186Sgordon 15598186Sgordon 15698186Sgordonclass IntFlagSetting { 15798186Sgordon intx val; 15898186Sgordon intx* flag; 15978344Sobrien public: 16098186Sgordon IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 16198186Sgordon ~IntFlagSetting() { *flag = val; } 16298186Sgordon}; 16398186Sgordon 16498186Sgordon 16578344Sobrienclass DoubleFlagSetting { 16678344Sobrien double val; 16798186Sgordon double* flag; 16878344Sobrien public: 16978344Sobrien DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 170126285Smtm ~DoubleFlagSetting() { *flag = val; } 17178344Sobrien}; 17278344Sobrien 173126285Smtm 17478344Sobrienclass CommandLineFlags { 17578344Sobrien public: 176126285Smtm static bool boolAt(char* name, size_t len, bool* value); 177126285Smtm static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 178126285Smtm static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 17978344Sobrien static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 18078344Sobrien 18198186Sgordon static bool intxAt(char* name, size_t len, intx* value); 18278344Sobrien static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 18378344Sobrien static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 18478344Sobrien static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 18578344Sobrien 18698186Sgordon static bool uintxAt(char* name, size_t len, uintx* value); 18798186Sgordon static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 18878344Sobrien static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 18998186Sgordon static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 19098186Sgordon 19178344Sobrien static bool doubleAt(char* name, size_t len, double* value); 19278344Sobrien static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 19378344Sobrien static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 19478344Sobrien static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 19578344Sobrien 19698186Sgordon static bool ccstrAt(char* name, size_t len, ccstr* value); 19778344Sobrien static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 19898186Sgordon static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 19978344Sobrien static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 20078344Sobrien 201131061Smtm // Returns false if name is not a command line flag. 20278344Sobrien static bool wasSetOnCmdline(const char* name, bool* value); 20378344Sobrien static void printSetFlags(); 20478344Sobrien 20578344Sobrien static void printFlags() PRODUCT_RETURN; 20698186Sgordon 20778344Sobrien static void verify() PRODUCT_RETURN; 20878344Sobrien}; 20998186Sgordon 21078344Sobrien// use this for flags that are true by default in the debug version but 21178344Sobrien// false in the optimized version, and vice versa 21278344Sobrien#ifdef ASSERT 21398186Sgordon#define trueInDebug true 21478344Sobrien#define falseInDebug false 21598186Sgordon#else 21698186Sgordon#define trueInDebug false 21778344Sobrien#define falseInDebug true 21878344Sobrien#endif 21978344Sobrien 22078344Sobrien// use this for flags that are true per default in the product build 22198186Sgordon// but false in development builds, and vice versa 22278344Sobrien#ifdef PRODUCT 22398186Sgordon#define trueInProduct true 22478344Sobrien#define falseInProduct false 22598186Sgordon#else 22698186Sgordon#define trueInProduct false 22798186Sgordon#define falseInProduct true 22898186Sgordon#endif 22998186Sgordon 23098186Sgordon// use this for flags that are true per default in the tiered build 23198186Sgordon// but false in non-tiered builds, and vice versa 23298186Sgordon#ifdef TIERED 23398186Sgordon#define trueInTiered true 23498186Sgordon#define falseInTiered false 23598186Sgordon#else 23698186Sgordon#define trueInTiered false 23798186Sgordon#define falseInTiered true 23898186Sgordon#endif 23998186Sgordon 24098186Sgordon// develop flags are settable / visible only during development and are constant in the PRODUCT version 24198186Sgordon// product flags are always settable / visible 24298186Sgordon// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 24398186Sgordon 24498186Sgordon// A flag must be declared with one of the following types: 24598186Sgordon// bool, intx, uintx, ccstr. 24698186Sgordon// The type "ccstr" is an alias for "const char*" and is used 24798186Sgordon// only in this file, because the macrology requires single-token type names. 24898186Sgordon 24998186Sgordon// Note: Diagnostic options not meant for VM tuning or for product modes. 25098186Sgordon// They are to be used for VM quality assurance or field diagnosis 25198186Sgordon// of VM bugs. They are hidden so that users will not be encouraged to 25298186Sgordon// try them as if they were VM ordinary execution options. However, they 25398186Sgordon// are available in the product version of the VM. Under instruction 25478344Sobrien// from support engineers, VM customers can turn them on to collect 25598186Sgordon// diagnostic information about VM problems. To use a VM diagnostic 25698186Sgordon// option, you must first specify +UnlockDiagnosticVMOptions. 25798186Sgordon// (This master switch also affects the behavior of -Xprintflags.) 25898186Sgordon// 25998186Sgordon// experimental flags are in support of features that are not 26098186Sgordon// part of the officially supported product, but are available 26178344Sobrien// for experimenting with. They could, for example, be performance 26298186Sgordon// features that may not have undergone full or rigorous QA, but which may 26398186Sgordon// help performance in some cases and released for experimentation 26498186Sgordon// by the community of users and developers. This flag also allows one to 26598186Sgordon// be able to build a fully supported product that nonetheless also 26698186Sgordon// ships with some unsupported, lightly tested, experimental features. 26798186Sgordon// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 26898186Sgordon// UnlockExperimentalVMOptions flag, which allows the control and 26998186Sgordon// modification of the experimental flags. 27098186Sgordon// 27198186Sgordon// manageable flags are writeable external product flags. 27298186Sgordon// They are dynamically writeable through the JDK management interface 27398186Sgordon// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 274126556Smtm// These flags are external exported interface (see CCC). The list of 27598186Sgordon// manageable flags can be queried programmatically through the management 27698186Sgordon// interface. 27798186Sgordon// 27898186Sgordon// A flag can be made as "manageable" only if 27998186Sgordon// - the flag is defined in a CCC as an external exported interface. 28098186Sgordon// - the VM implementation supports dynamic setting of the flag. 28198186Sgordon// This implies that the VM must *always* query the flag variable 28298186Sgordon// and not reuse state related to the flag state at any given time. 28398186Sgordon// - you want the flag to be queried programmatically by the customers. 28498186Sgordon// 28598186Sgordon// product_rw flags are writeable internal product flags. 286114272Smtm// They are like "manageable" flags but for internal/private use. 28798186Sgordon// The list of product_rw flags are internal/private flags which 28898186Sgordon// may be changed/removed in a future release. It can be set 28998186Sgordon// through the management interface to get/set value 29098186Sgordon// when the name of flag is supplied. 29198186Sgordon// 29298186Sgordon// A flag can be made as "product_rw" only if 29398186Sgordon// - the VM implementation supports dynamic setting of the flag. 29498186Sgordon// This implies that the VM must *always* query the flag variable 29598186Sgordon// and not reuse state related to the flag state at any given time. 296126286Smtm// 29798186Sgordon// Note that when there is a need to support develop flags to be writeable, 29898186Sgordon// it can be done in the same way as product_rw. 29998186Sgordon 30098186Sgordon#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 30198186Sgordon \ 30298186Sgordon lp64_product(bool, UseCompressedOops, false, \ 30398186Sgordon "Use 32-bit object references in 64-bit VM. " \ 30498186Sgordon "lp64_product means flag is always constant in 32 bit VM") \ 30598186Sgordon \ 30698186Sgordon lp64_product(bool, CheckCompressedOops, trueInDebug, \ 30798186Sgordon "generate checks in encoding/decoding code") \ 30898186Sgordon \ 30998186Sgordon product(bool, UseImplicitNullCheckForNarrowOop, true, \ 31078344Sobrien "generate implicit null check in indexed addressing mode.") \ 31198186Sgordon \ 31298186Sgordon /* UseMembar is theoretically a temp flag used for memory barrier \ 31398186Sgordon * removal testing. It was supposed to be removed before FCS but has \ 31498186Sgordon * been re-added (see 6401008) */ \ 31578344Sobrien product(bool, UseMembar, false, \ 31698186Sgordon "(Unstable) Issues membars on thread state transitions") \ 31798186Sgordon \ 31898186Sgordon product(bool, PrintCommandLineFlags, false, \ 31978344Sobrien "Prints flags that appeared on the command line") \ 32078344Sobrien \ 32178344Sobrien diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 32298186Sgordon "Enable normal processing of flags relating to field diagnostics")\ 32398186Sgordon \ 32498186Sgordon experimental(bool, UnlockExperimentalVMOptions, false, \ 32598186Sgordon "Enable normal processing of flags relating to experimental features")\ 32698186Sgordon \ 32778344Sobrien product(bool, JavaMonitorsInStackTrace, true, \ 32898186Sgordon "Print info. about Java monitor locks when the stacks are dumped")\ 32998186Sgordon \ 33078344Sobrien product_pd(bool, UseLargePages, \ 33198186Sgordon "Use large page memory") \ 33298186Sgordon \ 333126303Smtm product_pd(bool, UseLargePagesIndividualAllocation, \ 33478344Sobrien "Allocate large pages individually for better affinity") \ 33578344Sobrien \ 33678344Sobrien develop(bool, LargePagesIndividualAllocationInjectError, false, \ 33798186Sgordon "Fail large pages individual allocation") \ 33898186Sgordon \ 33978344Sobrien develop(bool, TracePageSizes, false, \ 34078344Sobrien "Trace page size selection and usage.") \ 34178344Sobrien \ 34298186Sgordon product(bool, UseNUMA, false, \ 34378344Sobrien "Use NUMA if available") \ 34478344Sobrien \ 34578344Sobrien product(bool, ForceNUMA, false, \ 34678344Sobrien "Force NUMA optimizations on single-node/UMA systems") \ 34798186Sgordon \ 34898186Sgordon product(intx, NUMAChunkResizeWeight, 20, \ 34998186Sgordon "Percentage (0-100) used to weight the current sample when " \ 35078344Sobrien "computing exponentially decaying average for " \ 35178344Sobrien "AdaptiveNUMAChunkSizing") \ 35298186Sgordon \ 35398186Sgordon product(intx, NUMASpaceResizeRate, 1*G, \ 35498186Sgordon "Do not reallocate more that this amount per collection") \ 35578344Sobrien \ 35698186Sgordon product(bool, UseAdaptiveNUMAChunkSizing, true, \ 35798186Sgordon "Enable adaptive chunk sizing for NUMA") \ 35878344Sobrien \ 35978344Sobrien product(bool, NUMAStats, false, \ 36078344Sobrien "Print NUMA stats in detailed heap information") \ 36178344Sobrien \ 36298186Sgordon product(intx, NUMAPageScanRate, 256, \ 36378344Sobrien "Maximum number of pages to include in the page scan procedure") \ 36478344Sobrien \ 36578344Sobrien product_pd(bool, NeedsDeoptSuspend, \ 36678344Sobrien "True for register window machines (sparc/ia64)") \ 36778344Sobrien \ 36878344Sobrien product(intx, UseSSE, 99, \ 36978344Sobrien "Highest supported SSE instructions set on x86/x64") \ 37078344Sobrien \ 37178344Sobrien product(uintx, LargePageSizeInBytes, 0, \ 37278344Sobrien "Large page size (0 to let VM choose the page size") \ 37378344Sobrien \ 37478344Sobrien product(uintx, LargePageHeapSizeThreshold, 128*M, \ 37598186Sgordon "Use large pages if max heap is at least this big") \ 37678344Sobrien \ 37778344Sobrien product(bool, ForceTimeHighResolution, false, \ 37898186Sgordon "Using high time resolution(For Win32 only)") \ 37978344Sobrien \ 38098186Sgordon develop(bool, TraceItables, false, \ 38198186Sgordon "Trace initialization and use of itables") \ 38298186Sgordon \ 38378344Sobrien develop(bool, TracePcPatching, false, \ 38498186Sgordon "Trace usage of frame::patch_pc") \ 38578344Sobrien \ 38678344Sobrien develop(bool, TraceJumps, false, \ 38798186Sgordon "Trace assembly jumps in thread ring buffer") \ 38898186Sgordon \ 38998186Sgordon develop(bool, TraceRelocator, false, \ 39098186Sgordon "Trace the bytecode relocator") \ 39178344Sobrien \ 39298186Sgordon develop(bool, TraceLongCompiles, false, \ 39378344Sobrien "Print out every time compilation is longer than " \ 39498186Sgordon "a given threashold") \ 39598186Sgordon \ 39698186Sgordon develop(bool, SafepointALot, false, \ 39798186Sgordon "Generates a lot of safepoints. Works with " \ 39878344Sobrien "GuaranteedSafepointInterval") \ 39978344Sobrien \ 40078344Sobrien product_pd(bool, BackgroundCompilation, \ 40178344Sobrien "A thread requesting compilation is not blocked during " \ 40278344Sobrien "compilation") \ 40378344Sobrien \ 40478344Sobrien product(bool, PrintVMQWaitTime, false, \ 40578344Sobrien "Prints out the waiting time in VM operation queue") \ 40678344Sobrien \ 40778344Sobrien develop(bool, BailoutToInterpreterForThrows, false, \ 40878344Sobrien "Compiled methods which throws/catches exceptions will be " \ 40978344Sobrien "deopt and intp.") \ 41098186Sgordon \ 41198186Sgordon develop(bool, NoYieldsInMicrolock, false, \ 41278344Sobrien "Disable yields in microlock") \ 41398186Sgordon \ 41498186Sgordon develop(bool, TraceOopMapGeneration, false, \ 41578344Sobrien "Shows oopmap generation") \ 41678344Sobrien \ 41778344Sobrien product(bool, MethodFlushing, true, \ 41878344Sobrien "Reclamation of zombie and not-entrant methods") \ 41998186Sgordon \ 42078344Sobrien develop(bool, VerifyStack, false, \ 42198186Sgordon "Verify stack of each thread when it is entering a runtime call") \ 42298186Sgordon \ 42398186Sgordon develop(bool, ForceUnreachable, false, \ 42498186Sgordon "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \ 42578344Sobrien \ 42698186Sgordon notproduct(bool, StressDerivedPointers, false, \ 42798186Sgordon "Force scavenge when a derived pointers is detected on stack " \ 42878344Sobrien "after rtm call") \ 42978344Sobrien \ 43078344Sobrien develop(bool, TraceDerivedPointers, false, \ 43178344Sobrien "Trace traversal of derived pointers on stack") \ 43298186Sgordon \ 43378344Sobrien notproduct(bool, TraceCodeBlobStacks, false, \ 43498186Sgordon "Trace stack-walk of codeblobs") \ 43598186Sgordon \ 43698186Sgordon product(bool, PrintJNIResolving, false, \ 43798186Sgordon "Used to implement -v:jni") \ 43898186Sgordon \ 43998186Sgordon notproduct(bool, PrintRewrites, false, \ 44098186Sgordon "Print methods that are being rewritten") \ 44198186Sgordon \ 44298186Sgordon product(bool, UseInlineCaches, true, \ 443126303Smtm "Use Inline Caches for virtual calls ") \ 44498186Sgordon \ 44598186Sgordon develop(bool, InlineArrayCopy, true, \ 44698186Sgordon "inline arraycopy native that is known to be part of " \ 44798186Sgordon "base library DLL") \ 44898186Sgordon \ 44998186Sgordon develop(bool, InlineObjectHash, true, \ 45098186Sgordon "inline Object::hashCode() native that is known to be part " \ 45198186Sgordon "of base library DLL") \ 45298186Sgordon \ 45398186Sgordon develop(bool, InlineObjectCopy, true, \ 45498186Sgordon "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 45598186Sgordon \ 45698186Sgordon develop(bool, InlineNatives, true, \ 45798186Sgordon "inline natives that are known to be part of base library DLL") \ 45878344Sobrien \ 45978344Sobrien develop(bool, InlineMathNatives, true, \ 460116097Smtm "inline SinD, CosD, etc.") \ 46198186Sgordon \ 46278344Sobrien develop(bool, InlineClassNatives, true, \ 46398186Sgordon "inline Class.isInstance, etc") \ 46478344Sobrien \ 46578344Sobrien develop(bool, InlineAtomicLong, true, \ 466132892Smtm "inline sun.misc.AtomicLong") \ 467132892Smtm \ 468132892Smtm develop(bool, InlineThreadNatives, true, \ 469132892Smtm "inline Thread.currentThread, etc") \ 470132892Smtm \ 471132892Smtm develop(bool, InlineReflectionGetCallerClass, true, \ 472126303Smtm "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 47398186Sgordon "of base library DLL") \ 47478344Sobrien \ 47598186Sgordon develop(bool, InlineUnsafeOps, true, \ 47698186Sgordon "inline memory ops (native methods) from sun.misc.Unsafe") \ 47778344Sobrien \ 478126303Smtm develop(bool, ConvertCmpD2CmpF, true, \ 47998186Sgordon "Convert cmpD to cmpF when one input is constant in float range") \ 480126303Smtm \ 481126303Smtm develop(bool, ConvertFloat2IntClipping, true, \ 48278344Sobrien "Convert float2int clipping idiom to integer clipping") \ 48378344Sobrien \ 48478344Sobrien develop(bool, SpecialStringCompareTo, true, \ 48578344Sobrien "special version of string compareTo") \ 486126303Smtm \ 487126303Smtm develop(bool, SpecialStringIndexOf, true, \ 488126303Smtm "special version of string indexOf") \ 489126303Smtm \ 490126303Smtm product(bool, SpecialArraysEquals, false, \ 491126303Smtm "special version of Arrays.equals(char[],char[])") \ 492126303Smtm \ 49378344Sobrien develop(bool, TraceCallFixup, false, \ 49478344Sobrien "traces all call fixups") \ 49598186Sgordon \ 49698186Sgordon develop(bool, DeoptimizeALot, false, \ 49798186Sgordon "deoptimize at every exit from the runtime system") \ 49898186Sgordon \ 49998186Sgordon notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 50078344Sobrien "a comma separated list of bcis to deoptimize at") \ 50198186Sgordon \ 50278344Sobrien product(bool, DeoptimizeRandom, false, \ 50398186Sgordon "deoptimize random frames on random exit from the runtime system")\ 50498186Sgordon \ 505131135Smtm notproduct(bool, ZombieALot, false, \ 506131135Smtm "creates zombies (non-entrant) at exit from the runt. system") \ 50778344Sobrien \ 50898186Sgordon notproduct(bool, WalkStackALot, false, \ 50998186Sgordon "trace stack (no print) at every exit from the runtime system") \ 51098186Sgordon \ 51178344Sobrien develop(bool, Debugging, false, \ 51278344Sobrien "set when executing debug methods in debug.ccp " \ 51398186Sgordon "(to prevent triggering assertions)") \ 51478344Sobrien \ 51578344Sobrien notproduct(bool, StrictSafepointChecks, trueInDebug, \ 51678344Sobrien "Enable strict checks that safepoints cannot happen for threads " \ 51798186Sgordon "that used No_Safepoint_Verifier") \ 51878344Sobrien \ 51978344Sobrien notproduct(bool, VerifyLastFrame, false, \ 52078344Sobrien "Verify oops on last frame on entry to VM") \ 52178344Sobrien \ 52298186Sgordon develop(bool, TraceHandleAllocation, false, \ 52378344Sobrien "Prints out warnings when suspicious many handles are allocated") \ 52498186Sgordon \ 52578344Sobrien product(bool, UseCompilerSafepoints, true, \ 52698186Sgordon "Stop at safepoints in compiled code") \ 52798186Sgordon \ 52898186Sgordon product(bool, UseSplitVerifier, true, \ 52978344Sobrien "use split verifier with StackMapTable attributes") \ 53098186Sgordon \ 531124832Smtm product(bool, FailOverToOldVerifier, true, \ 53298186Sgordon "fail over to old verifier when split verifier fails") \ 53398186Sgordon \ 53498186Sgordon develop(bool, ShowSafepointMsgs, false, \ 53598186Sgordon "Show msg. about safepoint synch.") \ 53678344Sobrien \ 53798186Sgordon product(bool, SafepointTimeout, false, \ 53878344Sobrien "Time out and warn or fail after SafepointTimeoutDelay " \ 53978344Sobrien "milliseconds if failed to reach safepoint") \ 54078344Sobrien \ 54198186Sgordon develop(bool, DieOnSafepointTimeout, false, \ 54278344Sobrien "Die upon failure to reach safepoint (see SafepointTimeout)") \ 54378344Sobrien \ 54478344Sobrien /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 54578344Sobrien /* typically, at most a few retries are needed */ \ 54678344Sobrien product(intx, SuspendRetryCount, 50, \ 54778344Sobrien "Maximum retry count for an external suspend request") \ 54878344Sobrien \ 54978344Sobrien product(intx, SuspendRetryDelay, 5, \ 55098186Sgordon "Milliseconds to delay per retry (* current_retry_count)") \ 55178344Sobrien \ 55278344Sobrien product(bool, AssertOnSuspendWaitFailure, false, \ 55378344Sobrien "Assert/Guarantee on external suspend wait failure") \ 55478344Sobrien \ 55578344Sobrien product(bool, TraceSuspendWaitFailures, false, \ 55678344Sobrien "Trace external suspend wait failures") \ 55798186Sgordon \ 55898186Sgordon product(bool, MaxFDLimit, true, \ 55978344Sobrien "Bump the number of file descriptors to max in solaris.") \ 56078344Sobrien \ 56178344Sobrien notproduct(bool, LogEvents, trueInDebug, \ 56278344Sobrien "Enable Event log") \ 563116097Smtm \ 564116097Smtm product(bool, BytecodeVerificationRemote, true, \ 565132892Smtm "Enables the Java bytecode verifier for remote classes") \ 566116097Smtm \ 567116097Smtm product(bool, BytecodeVerificationLocal, false, \ 568116097Smtm "Enables the Java bytecode verifier for local classes") \ 56978344Sobrien \ 57078344Sobrien develop(bool, ForceFloatExceptions, trueInDebug, \ 571116097Smtm "Force exceptions on FP stack under/overflow") \ 572116097Smtm \ 573132892Smtm develop(bool, SoftMatchFailure, trueInProduct, \ 574116097Smtm "If the DFA fails to match a node, print a message and bail out") \ 575116097Smtm \ 576116097Smtm develop(bool, VerifyStackAtCalls, false, \ 57798186Sgordon "Verify that the stack pointer is unchanged after calls") \ 578109582Smtm \ 579116097Smtm develop(bool, TraceJavaAssertions, false, \ 580116097Smtm "Trace java language assertions") \ 581132892Smtm \ 582116097Smtm notproduct(bool, CheckAssertionStatusDirectives, false, \ 583116097Smtm "temporary - see javaClasses.cpp") \ 584116097Smtm \ 58578344Sobrien notproduct(bool, PrintMallocFree, false, \ 58678344Sobrien "Trace calls to C heap malloc/free allocation") \ 58798186Sgordon \ 58878344Sobrien notproduct(bool, PrintOopAddress, false, \ 58978344Sobrien "Always print the location of the oop") \ 59098186Sgordon \ 59198186Sgordon notproduct(bool, VerifyCodeCacheOften, false, \ 59278344Sobrien "Verify compiled-code cache often") \ 59378344Sobrien \ 59478344Sobrien develop(bool, ZapDeadCompiledLocals, false, \ 59578344Sobrien "Zap dead locals in compiler frames") \ 59678344Sobrien \ 59778344Sobrien notproduct(bool, ZapDeadLocalsOld, false, \ 59878344Sobrien "Zap dead locals (old version, zaps all frames when " \ 599131135Smtm "entering the VM") \ 60098186Sgordon \ 60178344Sobrien notproduct(bool, CheckOopishValues, false, \ 60278344Sobrien "Warn if value contains oop ( requires ZapDeadLocals)") \ 60378344Sobrien \ 604126287Smtm develop(bool, UseMallocOnly, false, \ 60598186Sgordon "use only malloc/free for allocation (no resource area/arena)") \ 60678344Sobrien \ 60778344Sobrien develop(bool, PrintMalloc, false, \ 60878344Sobrien "print all malloc/free calls") \ 60978344Sobrien \ 61078344Sobrien develop(bool, ZapResourceArea, trueInDebug, \ 61178344Sobrien "Zap freed resource/arena space with 0xABABABAB") \ 61278344Sobrien \ 61378344Sobrien notproduct(bool, ZapVMHandleArea, trueInDebug, \ 61478344Sobrien "Zap freed VM handle space with 0xBCBCBCBC") \ 61598186Sgordon \ 61678344Sobrien develop(bool, ZapJNIHandleArea, trueInDebug, \ 61778344Sobrien "Zap freed JNI handle space with 0xFEFEFEFE") \ 61878344Sobrien \ 61978344Sobrien develop(bool, ZapUnusedHeapArea, trueInDebug, \ 62078344Sobrien "Zap unused heap space with 0xBAADBABE") \ 62178344Sobrien \ 62278344Sobrien develop(bool, TraceZapUnusedHeapArea, false, \ 62398186Sgordon "Trace zapping of unused heap space") \ 62478344Sobrien \ 62578344Sobrien develop(bool, CheckZapUnusedHeapArea, false, \ 62678344Sobrien "Check zapping of unused heap space") \ 62778344Sobrien \ 62878344Sobrien develop(bool, PrintVMMessages, true, \ 62978344Sobrien "Print vm messages on console") \ 63078344Sobrien \ 63198186Sgordon product(bool, PrintGCApplicationConcurrentTime, false, \ 63278344Sobrien "Print the time the application has been running") \ 63378344Sobrien \ 63478344Sobrien product(bool, PrintGCApplicationStoppedTime, false, \ 63578344Sobrien "Print the time the application has been stopped") \ 63678344Sobrien \ 63778344Sobrien develop(bool, Verbose, false, \ 63878344Sobrien "Prints additional debugging information from other modes") \ 63978344Sobrien \ 640116097Smtm develop(bool, PrintMiscellaneous, false, \ 641116097Smtm "Prints uncategorized debugging information (requires +Verbose)") \ 642116097Smtm \ 643116097Smtm develop(bool, WizardMode, false, \ 644116097Smtm "Prints much more debugging information") \ 645116097Smtm \ 64678344Sobrien product(bool, ShowMessageBoxOnError, false, \ 64778344Sobrien "Keep process alive on VM fatal error") \ 64878344Sobrien \ 64978344Sobrien product_pd(bool, UseOSErrorReporting, \ 65078344Sobrien "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 65178344Sobrien \ 65278344Sobrien product(bool, SuppressFatalErrorMessage, false, \ 65378344Sobrien "Do NO Fatal Error report [Avoid deadlock]") \ 65478344Sobrien \ 65598186Sgordon product(ccstrlist, OnError, "", \ 65678344Sobrien "Run user-defined commands on fatal error; see VMError.cpp " \ 65778344Sobrien "for examples") \ 65878344Sobrien \ 65978344Sobrien product(ccstrlist, OnOutOfMemoryError, "", \ 66098186Sgordon "Run user-defined commands on first java.lang.OutOfMemoryError") \ 66198186Sgordon \ 66298186Sgordon manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 66398186Sgordon "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 66478344Sobrien \ 66598186Sgordon manageable(ccstr, HeapDumpPath, NULL, \ 66698186Sgordon "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 66798186Sgordon "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 66898186Sgordon "in the working directory)") \ 66998186Sgordon \ 670116097Smtm develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 671116097Smtm "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 672116097Smtm "when the heap usage is larger than this") \ 67398186Sgordon \ 67498186Sgordon develop(uintx, HeapDumpSegmentSize, 1*G, \ 67598186Sgordon "Approximate segment size when generating a segmented heap dump") \ 676116097Smtm \ 677116097Smtm develop(bool, BreakAtWarning, false, \ 678116097Smtm "Execute breakpoint upon encountering VM warning") \ 679116097Smtm \ 68078344Sobrien product_pd(bool, UseVectoredExceptions, \ 68178344Sobrien "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 68278344Sobrien \ 68398186Sgordon develop(bool, TraceVMOperation, false, \ 684131135Smtm "Trace vm operations") \ 68578344Sobrien \ 68678344Sobrien develop(bool, UseFakeTimers, false, \ 68778344Sobrien "Tells whether the VM should use system time or a fake timer") \ 68878344Sobrien \ 68978344Sobrien diagnostic(bool, LogCompilation, false, \ 69078344Sobrien "Log compilation activity in detail to hotspot.log or LogFile") \ 69178344Sobrien \ 69278344Sobrien product(bool, PrintCompilation, false, \ 69378344Sobrien "Print compilations") \ 69498186Sgordon \ 69598186Sgordon diagnostic(bool, TraceNMethodInstalls, false, \ 69698186Sgordon "Trace nmethod intallation") \ 697117977Smtm \ 698116097Smtm diagnostic(bool, TraceOSRBreakpoint, false, \ 699116097Smtm "Trace OSR Breakpoint ") \ 700116097Smtm \ 701116097Smtm diagnostic(bool, TraceCompileTriggered, false, \ 70278344Sobrien "Trace compile triggered") \ 70398186Sgordon \ 70498186Sgordon diagnostic(bool, TraceTriggers, false, \ 70598186Sgordon "Trace triggers") \ 70678344Sobrien \ 70798186Sgordon product(bool, AlwaysRestoreFPU, false, \ 70898186Sgordon "Restore the FPU control word after every JNI call (expensive)") \ 70998186Sgordon \ 71098186Sgordon notproduct(bool, PrintCompilation2, false, \ 71198186Sgordon "Print additional statistics per compilation") \ 71298186Sgordon \ 71398186Sgordon diagnostic(bool, PrintAdapterHandlers, false, \ 71498186Sgordon "Print code generated for i2c/c2i adapters") \ 715116097Smtm \ 716116097Smtm diagnostic(bool, PrintAssembly, false, \ 717116097Smtm "Print assembly code (using external disassembler.so)") \ 71898186Sgordon \ 71998186Sgordon diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 72098186Sgordon "Options string passed to disassembler.so") \ 72198186Sgordon \ 722116097Smtm diagnostic(bool, PrintNMethods, false, \ 723116097Smtm "Print assembly code for nmethods when generated") \ 724116097Smtm \ 725116097Smtm diagnostic(bool, PrintNativeNMethods, false, \ 72678344Sobrien "Print assembly code for native nmethods when generated") \ 72778344Sobrien \ 72878344Sobrien develop(bool, PrintDebugInfo, false, \ 72998186Sgordon "Print debug information for all nmethods when generated") \ 73078344Sobrien \ 73178344Sobrien develop(bool, PrintRelocations, false, \ 73278344Sobrien "Print relocation information for all nmethods when generated") \ 73378344Sobrien \ 73478344Sobrien develop(bool, PrintDependencies, false, \ 73578344Sobrien "Print dependency information for all nmethods when generated") \ 73678344Sobrien \ 73778344Sobrien develop(bool, PrintExceptionHandlers, false, \ 73878344Sobrien "Print exception handler tables for all nmethods when generated") \ 739116097Smtm \ 740116097Smtm develop(bool, InterceptOSException, false, \ 741116097Smtm "Starts debugger when an implicit OS (e.g., NULL) " \ 742116097Smtm "exception happens") \ 743116097Smtm \ 74478344Sobrien notproduct(bool, PrintCodeCache, false, \ 74598186Sgordon "Print the compiled_code cache when exiting") \ 74698186Sgordon \ 74798186Sgordon develop(bool, PrintCodeCache2, false, \ 74898186Sgordon "Print detailed info on the compiled_code cache when exiting") \ 749116097Smtm \ 750116097Smtm diagnostic(bool, PrintStubCode, false, \ 751116097Smtm "Print generated stub code") \ 752116097Smtm \ 753116097Smtm product(bool, StackTraceInThrowable, true, \ 754116097Smtm "Collect backtrace in throwable when exception happens") \ 75598186Sgordon \ 75678344Sobrien product(bool, OmitStackTraceInFastThrow, true, \ 75778344Sobrien "Omit backtraces for some 'hot' exceptions in optimized code") \ 75878344Sobrien \ 759116097Smtm product(bool, ProfilerPrintByteCodeStatistics, false, \ 760132892Smtm "Prints byte code statictics when dumping profiler output") \ 761116097Smtm \ 762116097Smtm product(bool, ProfilerRecordPC, false, \ 763116097Smtm "Collects tick for each 16 byte interval of compiled code") \ 76478344Sobrien \ 76578344Sobrien product(bool, ProfileVM, false, \ 76678344Sobrien "Profiles ticks that fall within VM (either in the VM Thread " \ 76778344Sobrien "or VM code called through stubs)") \ 768126285Smtm \ 76978344Sobrien product(bool, ProfileIntervals, false, \ 77078344Sobrien "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 771126285Smtm \ 77278344Sobrien notproduct(bool, ProfilerCheckIntervals, false, \ 773132892Smtm "Collect and print info on spacing of profiler ticks") \ 774132892Smtm \ 77598186Sgordon develop(bool, PrintJVMWarnings, false, \ 776116097Smtm "Prints warnings for unimplemented JVM functions") \ 777132892Smtm \ 778116097Smtm notproduct(uintx, WarnOnStalledSpinLock, 0, \ 779116097Smtm "Prints warnings for stalled SpinLocks") \ 78078344Sobrien \ 78178344Sobrien develop(bool, InitializeJavaLangSystem, true, \ 78298186Sgordon "Initialize java.lang.System - turn off for individual " \ 78398186Sgordon "method debugging") \ 78498186Sgordon \ 78598186Sgordon develop(bool, InitializeJavaLangString, true, \ 78698186Sgordon "Initialize java.lang.String - turn off for individual " \ 78798186Sgordon "method debugging") \ 78878344Sobrien \ 78978344Sobrien develop(bool, InitializeJavaLangExceptionsErrors, true, \ 79078344Sobrien "Initialize various error and exception classes - turn off for " \ 79178344Sobrien "individual method debugging") \ 79278344Sobrien \ 79378344Sobrien product(bool, RegisterFinalizersAtInit, true, \ 79478344Sobrien "Register finalizable objects at end of Object.<init> or " \ 79578344Sobrien "after allocation.") \ 79678344Sobrien \ 79778344Sobrien develop(bool, RegisterReferences, true, \ 79878344Sobrien "Tells whether the VM should register soft/weak/final/phantom " \ 79978344Sobrien "references") \ 80078344Sobrien \ 80178344Sobrien develop(bool, IgnoreRewrites, false, \ 80278344Sobrien "Supress rewrites of bytecodes in the oopmap generator. " \ 80378344Sobrien "This is unsafe!") \ 804116097Smtm \ 80578344Sobrien develop(bool, PrintCodeCacheExtension, false, \ 80678344Sobrien "Print extension of code cache") \ 80798186Sgordon \ 80878344Sobrien develop(bool, UsePrivilegedStack, true, \ 80978344Sobrien "Enable the security JVM functions") \ 81078344Sobrien \ 81178344Sobrien develop(bool, IEEEPrecision, true, \ 81278344Sobrien "Enables IEEE precision (for INTEL only)") \ 81378344Sobrien \ 81478344Sobrien develop(bool, ProtectionDomainVerification, true, \ 81578344Sobrien "Verifies protection domain before resolution in system " \ 81698186Sgordon "dictionary") \ 81798186Sgordon \ 81898186Sgordon product(bool, ClassUnloading, true, \ 81978344Sobrien "Do unloading of classes") \ 82078344Sobrien \ 82178344Sobrien diagnostic(bool, LinkWellKnownClasses, false, \ 82278344Sobrien "Resolve a well known class as soon as its name is seen") \ 82378344Sobrien \ 82478344Sobrien develop(bool, DisableStartThread, false, \ 82578344Sobrien "Disable starting of additional Java threads " \ 82678344Sobrien "(for debugging only)") \ 82778344Sobrien \ 82898186Sgordon develop(bool, MemProfiling, false, \ 82998186Sgordon "Write memory usage profiling to log file") \ 83098186Sgordon \ 83198186Sgordon notproduct(bool, PrintSystemDictionaryAtExit, false, \ 83298186Sgordon "Prints the system dictionary at exit") \ 83378344Sobrien \ 83478344Sobrien diagnostic(bool, UnsyncloadClass, false, \ 83578344Sobrien "Unstable: VM calls loadClass unsynchronized. Custom classloader "\ 83678344Sobrien "must call VM synchronized for findClass & defineClass") \ 837126288Smtm \ 83898186Sgordon product_pd(bool, DontYieldALot, \ 83998186Sgordon "Throw away obvious excess yield calls (for SOLARIS only)") \ 84078344Sobrien \ 84198186Sgordon product_pd(bool, ConvertSleepToYield, \ 84298186Sgordon "Converts sleep(0) to thread yield " \ 84398186Sgordon "(may be off for SOLARIS to improve GUI)") \ 84498186Sgordon \ 845130161Smtm product(bool, ConvertYieldToSleep, false, \ 846130161Smtm "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 84798186Sgordon "behavior (SOLARIS only)") \ 84898186Sgordon \ 84998186Sgordon product(bool, UseBoundThreads, true, \ 85078344Sobrien "Bind user level threads to kernel threads (for SOLARIS only)") \ 85178344Sobrien \ 85278344Sobrien develop(bool, UseDetachedThreads, true, \ 85378344Sobrien "Use detached threads that are recycled upon termination " \ 85478344Sobrien "(for SOLARIS only)") \ 85578344Sobrien \ 85678344Sobrien product(bool, UseLWPSynchronization, true, \ 85778344Sobrien "Use LWP-based instead of libthread-based synchronization " \ 85878344Sobrien "(SPARC only)") \ 85978344Sobrien \ 86078344Sobrien product(ccstr, SyncKnobs, NULL, \ 86178344Sobrien "(Unstable) Various monitor synchronization tunables") \ 86278344Sobrien \ 86378344Sobrien product(intx, EmitSync, 0, \ 86478344Sobrien "(Unsafe,Unstable) " \ 865126285Smtm " Controls emission of inline sync fast-path code") \ 866126285Smtm \ 867126285Smtm product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 86898186Sgordon \ 86998186Sgordon product(intx, Atomics, 0, \ 87098186Sgordon "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 87198186Sgordon \ 87298186Sgordon product(intx, FenceInstruction, 0, \ 87398186Sgordon "(Unsafe,Unstable) Experimental") \ 87498186Sgordon \ 87598186Sgordon product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 876126285Smtm \ 87798186Sgordon product(intx, SyncVerbose, 0, "(Unstable)" ) \ 87878344Sobrien \ 87998186Sgordon product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 88078344Sobrien \ 88178344Sobrien product(intx, hashCode, 0, \ 882101850Sgordon "(Unstable) select hashCode generation algorithm" ) \ 883101850Sgordon \ 884101850Sgordon product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 885103018Sgordon "(Unstable, Linux-specific)" \ 886101850Sgordon " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 887101850Sgordon \ 888101850Sgordon product(bool, FilterSpuriousWakeups , true, \ 889101850Sgordon "Prevent spurious or premature wakeups from object.wait" \ 890101850Sgordon "(Solaris only)") \ 891101850Sgordon \ 892101850Sgordon product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 893101850Sgordon product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 894115950Smtm product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 895115950Smtm \ 896101850Sgordon develop(bool, UsePthreads, false, \ 897101850Sgordon "Use pthread-based instead of libthread-based synchronization " \ 898101850Sgordon "(SPARC only)") \ 89978344Sobrien \ 90078344Sobrien product(bool, AdjustConcurrency, false, \ 90178344Sobrien "call thr_setconcurrency at thread create time to avoid " \ 90278344Sobrien "LWP starvation on MP systems (For Solaris Only)") \ 90378344Sobrien \ 90478344Sobrien develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 90578344Sobrien "Should the system attempt to update the compiler file when " \ 90678344Sobrien "an error occurs?") \ 90778344Sobrien \ 908126303Smtm product(bool, ReduceSignalUsage, false, \ 90978344Sobrien "Reduce the use of OS signals in Java and/or the VM") \ 91078344Sobrien \ 911126286Smtm notproduct(bool, ValidateMarkSweep, false, \ 91278344Sobrien "Do extra validation during MarkSweep collection") \ 91378344Sobrien \ 91478344Sobrien notproduct(bool, RecordMarkSweepCompaction, false, \ 91578344Sobrien "Enable GC-to-GC recording and querying of compaction during " \ 91678344Sobrien "MarkSweep") \ 91778344Sobrien \ 91878344Sobrien develop_pd(bool, ShareVtableStubs, \ 91978344Sobrien "Share vtable stubs (smaller code but worse branch prediction") \ 92078344Sobrien \ 92178344Sobrien develop(bool, LoadLineNumberTables, true, \ 92278344Sobrien "Tells whether the class file parser loads line number tables") \ 92378344Sobrien \ 92478344Sobrien develop(bool, LoadLocalVariableTables, true, \ 92578344Sobrien "Tells whether the class file parser loads local variable tables")\ 92678344Sobrien \ 92778344Sobrien develop(bool, LoadLocalVariableTypeTables, true, \ 928106643Sgordon "Tells whether the class file parser loads local variable type tables")\ 929106643Sgordon \ 930106643Sgordon product(bool, AllowUserSignalHandlers, false, \ 931106643Sgordon "Do not complain if the application installs signal handlers " \ 93278344Sobrien "(Solaris & Linux only)") \ 93378344Sobrien \ 93478344Sobrien product(bool, UseSignalChaining, true, \ 93578344Sobrien "Use signal-chaining to invoke signal handlers installed " \ 93678344Sobrien "by the application (Solaris & Linux only)") \ 93778344Sobrien \ 93878344Sobrien product(bool, UseAltSigs, false, \ 93978344Sobrien "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 94078344Sobrien "internal signals. (Solaris only)") \ 941106643Sgordon \ 942106643Sgordon product(bool, UseSpinning, false, \ 943106643Sgordon "Use spinning in monitor inflation and before entry") \ 944106643Sgordon \ 94578344Sobrien product(bool, PreSpinYield, false, \ 94698186Sgordon "Yield before inner spinning loop") \ 94798186Sgordon \ 94898186Sgordon product(bool, PostSpinYield, true, \ 94998186Sgordon "Yield after inner spinning loop") \ 95098186Sgordon \ 95198186Sgordon product(bool, AllowJNIEnvProxy, false, \ 95298186Sgordon "Allow JNIEnv proxies for jdbx") \ 953119170Smtm \ 954119170Smtm product(bool, JNIDetachReleasesMonitors, true, \ 955119170Smtm "JNI DetachCurrentThread releases monitors owned by thread") \ 956119170Smtm \ 957119170Smtm product(bool, RestoreMXCSROnJNICalls, false, \ 958119170Smtm "Restore MXCSR when returning from JNI calls") \ 959119170Smtm \ 960119170Smtm product(bool, CheckJNICalls, false, \ 96198186Sgordon "Verify all arguments to JNI calls") \ 96298186Sgordon \ 96398186Sgordon product(bool, UseFastJNIAccessors, true, \ 96498186Sgordon "Use optimized versions of Get<Primitive>Field") \ 965106643Sgordon \ 96698186Sgordon product(bool, EagerXrunInit, false, \ 96798186Sgordon "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 96898186Sgordon " but not all -Xrun libraries may support the state of the VM at this time") \ 96998186Sgordon \ 97098186Sgordon product(bool, PreserveAllAnnotations, false, \ 97198186Sgordon "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 97298186Sgordon \ 973106700Sgordon develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 974106700Sgordon "Number of OutOfMemoryErrors preallocated with backtrace") \ 975106700Sgordon \ 976106643Sgordon product(bool, LazyBootClassLoader, true, \ 97798186Sgordon "Enable/disable lazy opening of boot class path entries") \ 97898186Sgordon \ 97998186Sgordon diagnostic(bool, UseIncDec, true, \ 98098186Sgordon "Use INC, DEC instructions on x86") \ 98198186Sgordon \ 98298186Sgordon product(bool, UseNewLongLShift, false, \ 98398186Sgordon "Use optimized bitwise shift left") \ 98498186Sgordon \ 98598186Sgordon product(bool, UseStoreImmI16, true, \ 98698186Sgordon "Use store immediate 16-bits value instruction on x86") \ 98798186Sgordon \ 98898186Sgordon product(bool, UseAddressNop, false, \ 98998186Sgordon "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 99098186Sgordon \ 99198186Sgordon product(bool, UseXmmLoadAndClearUpper, true, \ 99298186Sgordon "Load low part of XMM register and clear upper part") \ 99398186Sgordon \ 99498186Sgordon product(bool, UseXmmRegToRegMoveAll, false, \ 99598186Sgordon "Copy all XMM register bits when moving value between registers") \ 99698186Sgordon \ 99798186Sgordon product(bool, UseXmmI2D, false, \ 99898186Sgordon "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 99998186Sgordon \ 100098186Sgordon product(bool, UseXmmI2F, false, \ 100198186Sgordon "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 100298186Sgordon \ 100398186Sgordon product(bool, UseXMMForArrayCopy, false, \ 100498186Sgordon "Use SSE2 MOVQ instruction for Arraycopy") \ 100598186Sgordon \ 100698186Sgordon product(bool, UseUnalignedLoadStores, false, \ 100798186Sgordon "Use SSE2 MOVDQU instruction for Arraycopy") \ 100898186Sgordon \ 100998186Sgordon product(intx, FieldsAllocationStyle, 1, \ 101098186Sgordon "0 - type based with oops first, 1 - with oops last") \ 101198186Sgordon \ 101298186Sgordon product(bool, CompactFields, true, \ 101398186Sgordon "Allocate nonstatic fields in gaps between previous fields") \ 101498186Sgordon \ 101598186Sgordon notproduct(bool, PrintCompactFieldsSavings, false, \ 101698186Sgordon "Print how many words were saved with CompactFields") \ 101798186Sgordon \ 101898186Sgordon product(bool, UseBiasedLocking, true, \ 101998186Sgordon "Enable biased locking in JVM") \ 102098186Sgordon \ 102198186Sgordon product(intx, BiasedLockingStartupDelay, 4000, \ 102298186Sgordon "Number of milliseconds to wait before enabling biased locking") \ 102398186Sgordon \ 102498186Sgordon diagnostic(bool, PrintBiasedLockingStatistics, false, \ 102598186Sgordon "Print statistics of biased locking in JVM") \ 102698186Sgordon \ 102798186Sgordon product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 102898186Sgordon "Threshold of number of revocations per type to try to " \ 102998186Sgordon "rebias all objects in the heap of that type") \ 103098186Sgordon \ 103198186Sgordon product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 103298186Sgordon "Threshold of number of revocations per type to permanently " \ 103398186Sgordon "revoke biases of all objects in the heap of that type") \ 103498186Sgordon \ 103598186Sgordon product(intx, BiasedLockingDecayTime, 25000, \ 103698186Sgordon "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 103798186Sgordon "type after previous bulk rebias") \ 103898186Sgordon \ 103998186Sgordon /* tracing */ \ 104098186Sgordon \ 104198186Sgordon notproduct(bool, TraceRuntimeCalls, false, \ 104298186Sgordon "Trace run-time calls") \ 104398186Sgordon \ 104498186Sgordon develop(bool, TraceJNICalls, false, \ 104598186Sgordon "Trace JNI calls") \ 104698186Sgordon \ 104798186Sgordon notproduct(bool, TraceJVMCalls, false, \ 104898186Sgordon "Trace JVM calls") \ 104998186Sgordon \ 105098186Sgordon product(ccstr, TraceJVMTI, NULL, \ 105198186Sgordon "Trace flags for JVMTI functions and events") \ 105298186Sgordon \ 105398186Sgordon /* This option can change an EMCP method into an obsolete method. */ \ 105498186Sgordon /* This can affect tests that except specific methods to be EMCP. */ \ 105598186Sgordon /* This option should be used with caution. */ \ 105698186Sgordon product(bool, StressLdcRewrite, false, \ 105798186Sgordon "Force ldc -> ldc_w rewrite during RedefineClasses") \ 105898186Sgordon \ 105998186Sgordon product(intx, TraceRedefineClasses, 0, \ 106098186Sgordon "Trace level for JVMTI RedefineClasses") \ 106198186Sgordon \ 106298186Sgordon /* change to false by default sometime after Mustang */ \ 106398186Sgordon product(bool, VerifyMergedCPBytecodes, true, \ 106498186Sgordon "Verify bytecodes after RedefineClasses constant pool merging") \ 106598186Sgordon \ 1066119166Smtm develop(bool, TraceJNIHandleAllocation, false, \ 1067123344Smtm "Trace allocation/deallocation of JNI handle blocks") \ 1068123344Smtm \ 1069123344Smtm develop(bool, TraceThreadEvents, false, \ 1070123344Smtm "Trace all thread events") \ 1071123344Smtm \ 1072119166Smtm develop(bool, TraceBytecodes, false, \ 1073123344Smtm "Trace bytecode execution") \ 1074119166Smtm \ 1075123344Smtm develop(bool, TraceClassInitialization, false, \ 1076123344Smtm "Trace class initialization") \ 1077123344Smtm \ 1078123344Smtm develop(bool, TraceExceptions, false, \ 1079123344Smtm "Trace exceptions") \ 1080119166Smtm \ 1081123344Smtm develop(bool, TraceICs, false, \ 1082123344Smtm "Trace inline cache changes") \ 1083119166Smtm \ 1084119166Smtm notproduct(bool, TraceInvocationCounterOverflow, false, \ 1085123344Smtm "Trace method invocation counter overflow") \ 1086123344Smtm \ 1087119166Smtm develop(bool, TraceInlineCacheClearing, false, \ 1088119166Smtm "Trace clearing of inline caches in nmethods") \ 1089119166Smtm \ 1090123344Smtm develop(bool, TraceDependencies, false, \ 1091119166Smtm "Trace dependencies") \ 1092119166Smtm \ 1093119166Smtm develop(bool, VerifyDependencies, trueInDebug, \ 1094119166Smtm "Exercise and verify the compilation dependency mechanism") \ 1095119166Smtm \ 1096119166Smtm develop(bool, TraceNewOopMapGeneration, false, \ 1097119166Smtm "Trace OopMapGeneration") \ 1098119166Smtm \ 1099119166Smtm develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1100119166Smtm "Trace OopMapGeneration: print detailed cell states") \ 1101119166Smtm \ 1102119166Smtm develop(bool, TimeOopMap, false, \ 1103119166Smtm "Time calls to GenerateOopMap::compute_map() in sum") \ 1104119166Smtm \ 1105119166Smtm develop(bool, TimeOopMap2, false, \ 1106119166Smtm "Time calls to GenerateOopMap::compute_map() individually") \ 1107119166Smtm \ 1108119166Smtm develop(bool, TraceMonitorMismatch, false, \ 1109119166Smtm "Trace monitor matching failures during OopMapGeneration") \ 1110119166Smtm \ 1111119166Smtm develop(bool, TraceOopMapRewrites, false, \ 1112119166Smtm "Trace rewritting of method oops during oop map generation") \ 1113119166Smtm \ 1114119166Smtm develop(bool, TraceSafepoint, false, \ 1115119166Smtm "Trace safepoint operations") \ 1116119166Smtm \ 1117119166Smtm develop(bool, TraceICBuffer, false, \ 1118119166Smtm "Trace usage of IC buffer") \ 1119119166Smtm \ 1120119166Smtm develop(bool, TraceCompiledIC, false, \ 1121119166Smtm "Trace changes of compiled IC") \ 1122119166Smtm \ 1123119166Smtm notproduct(bool, TraceZapDeadLocals, false, \ 1124119166Smtm "Trace zapping dead locals") \ 1125119166Smtm \ 1126119166Smtm develop(bool, TraceStartupTime, false, \ 1127119166Smtm "Trace setup time") \ 1128119166Smtm \ 1129119166Smtm develop(bool, TraceHPI, false, \ 1130119166Smtm "Trace Host Porting Interface (HPI)") \ 1131119166Smtm \ 1132119166Smtm product(ccstr, HPILibPath, NULL, \ 1133119166Smtm "Specify alternate path to HPI library") \ 1134119166Smtm \ 1135119166Smtm develop(bool, TraceProtectionDomainVerification, false, \ 1136119166Smtm "Trace protection domain verifcation") \ 1137119166Smtm \ 1138119166Smtm develop(bool, TraceClearedExceptions, false, \ 1139119166Smtm "Prints when an exception is forcibly cleared") \ 1140119166Smtm \ 1141119166Smtm product(bool, TraceClassResolution, false, \ 1142119166Smtm "Trace all constant pool resolutions (for debugging)") \ 1143119166Smtm \ 1144119166Smtm product(bool, TraceBiasedLocking, false, \ 1145119166Smtm "Trace biased locking in JVM") \ 1146119166Smtm \ 1147119166Smtm product(bool, TraceMonitorInflation, false, \ 1148119166Smtm "Trace monitor inflation in JVM") \ 1149119166Smtm \ 1150119166Smtm /* assembler */ \ 1151119166Smtm product(bool, Use486InstrsOnly, false, \ 1152119166Smtm "Use 80486 Compliant instruction subset") \ 1153119166Smtm \ 1154119166Smtm /* gc */ \ 1155119166Smtm \ 1156119166Smtm product(bool, UseSerialGC, false, \ 1157119166Smtm "Use the serial garbage collector") \ 1158119166Smtm \ 1159119166Smtm experimental(bool, UseG1GC, false, \ 1160119166Smtm "Use the Garbage-First garbage collector") \ 1161119166Smtm \ 1162119166Smtm product(bool, UseParallelGC, false, \ 1163119166Smtm "Use the Parallel Scavenge garbage collector") \ 1164119166Smtm \ 1165119166Smtm product(bool, UseParallelOldGC, false, \ 1166119166Smtm "Use the Parallel Old garbage collector") \ 1167119166Smtm \ 1168119166Smtm product(bool, UseParallelOldGCCompacting, true, \ 1169119166Smtm "In the Parallel Old garbage collector use parallel compaction") \ 1170119166Smtm \ 1171119166Smtm product(bool, UseParallelDensePrefixUpdate, true, \ 1172119166Smtm "In the Parallel Old garbage collector use parallel dense" \ 1173119166Smtm " prefix update") \ 1174119166Smtm \ 1175119166Smtm product(uintx, HeapMaximumCompactionInterval, 20, \ 1176119166Smtm "How often should we maximally compact the heap (not allowing " \ 1177119166Smtm "any dead space)") \ 1178119166Smtm \ 1179119166Smtm product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1180119166Smtm "The collection count for the first maximum compaction") \ 1181119166Smtm \ 1182119166Smtm product(bool, UseMaximumCompactionOnSystemGC, true, \ 1183119166Smtm "In the Parallel Old garbage collector maximum compaction for " \ 1184119166Smtm "a system GC") \ 1185119166Smtm \ 1186119166Smtm product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1187119166Smtm "The mean used by the par compact dead wood" \ 1188119166Smtm "limiter (a number between 0-100).") \ 1189119166Smtm \ 1190119166Smtm product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1191119166Smtm "The standard deviation used by the par compact dead wood" \ 1192119166Smtm "limiter (a number between 0-100).") \ 1193119166Smtm \ 1194119166Smtm product(bool, UseParallelOldGCDensePrefix, true, \ 1195119166Smtm "Use a dense prefix with the Parallel Old garbage collector") \ 1196119166Smtm \ 1197119166Smtm product(uintx, ParallelGCThreads, 0, \ 1198119166Smtm "Number of parallel threads parallel gc will use") \ 1199119166Smtm \ 1200119166Smtm product(uintx, ParallelCMSThreads, 0, \ 1201119166Smtm "Max number of threads CMS will use for concurrent work") \ 1202119166Smtm \ 1203119166Smtm develop(bool, ParallelOldMTUnsafeMarkBitMap, false, \ 1204119166Smtm "Use the Parallel Old MT unsafe in marking the bitmap") \ 1205119166Smtm \ 1206119166Smtm develop(bool, ParallelOldMTUnsafeUpdateLiveData, false, \ 1207119166Smtm "Use the Parallel Old MT unsafe in update of live size") \ 1208119166Smtm \ 1209119166Smtm develop(bool, TraceRegionTasksQueuing, false, \ 1210119166Smtm "Trace the queuing of the region tasks") \ 1211119166Smtm \ 1212119166Smtm product(uintx, ParallelMarkingThreads, 0, \ 1213119166Smtm "Number of marking threads concurrent gc will use") \ 1214119166Smtm \ 1215119166Smtm product(uintx, YoungPLABSize, 4096, \ 1216119166Smtm "Size of young gen promotion labs (in HeapWords)") \ 1217119166Smtm \ 1218119166Smtm product(uintx, OldPLABSize, 1024, \ 1219119166Smtm "Size of old gen promotion labs (in HeapWords)") \ 1220119166Smtm \ 1221119166Smtm product(uintx, GCTaskTimeStampEntries, 200, \ 1222119166Smtm "Number of time stamp entries per gc worker thread") \ 1223119166Smtm \ 1224119166Smtm product(bool, AlwaysTenure, false, \ 1225119166Smtm "Always tenure objects in eden. (ParallelGC only)") \ 1226119166Smtm \ 1227119166Smtm product(bool, NeverTenure, false, \ 1228119166Smtm "Never tenure objects in eden, May tenure on overflow" \ 1229119166Smtm " (ParallelGC only)") \ 1230119166Smtm \ 1231119166Smtm product(bool, ScavengeBeforeFullGC, true, \ 1232119166Smtm "Scavenge youngest generation before each full GC," \ 1233119166Smtm " used with UseParallelGC") \ 1234119166Smtm \ 1235119166Smtm develop(bool, ScavengeWithObjectsInToSpace, false, \ 1236119166Smtm "Allow scavenges to occur when to_space contains objects.") \ 1237119166Smtm \ 1238119166Smtm product(bool, UseConcMarkSweepGC, false, \ 1239119166Smtm "Use Concurrent Mark-Sweep GC in the old generation") \ 1240119166Smtm \ 1241119166Smtm product(bool, ExplicitGCInvokesConcurrent, false, \ 1242119166Smtm "A System.gc() request invokes a concurrent collection;" \ 1243119166Smtm " (effective only when UseConcMarkSweepGC)") \ 1244119166Smtm \ 1245119166Smtm product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1246119166Smtm "A System.gc() request invokes a concurrent collection and" \ 1247119166Smtm " also unloads classes during such a concurrent gc cycle " \ 1248119166Smtm " (effective only when UseConcMarkSweepGC)") \ 1249119166Smtm \ 1250119166Smtm develop(bool, UseCMSAdaptiveFreeLists, true, \ 1251119166Smtm "Use Adaptive Free Lists in the CMS generation") \ 1252119166Smtm \ 1253119166Smtm develop(bool, UseAsyncConcMarkSweepGC, true, \ 1254119166Smtm "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1255119166Smtm \ 1256119166Smtm develop(bool, RotateCMSCollectionTypes, false, \ 1257119166Smtm "Rotate the CMS collections among concurrent and STW") \ 1258119166Smtm \ 1259119166Smtm product(bool, UseCMSBestFit, true, \ 1260124797Scperciva "Use CMS best fit allocation strategy") \ 1261119166Smtm \ 1262119166Smtm product(bool, UseCMSCollectionPassing, true, \ 1263119166Smtm "Use passing of collection from background to foreground") \ 1264119166Smtm \ 1265119166Smtm product(bool, UseParNewGC, false, \ 1266119166Smtm "Use parallel threads in the new generation.") \ 1267119166Smtm \ 1268119166Smtm product(bool, ParallelGCVerbose, false, \ 1269119166Smtm "Verbose output for parallel GC.") \ 1270119166Smtm \ 1271119166Smtm product(intx, ParallelGCBufferWastePct, 10, \ 1272119166Smtm "wasted fraction of parallel allocation buffer.") \ 1273119166Smtm \ 1274119166Smtm product(bool, ParallelGCRetainPLAB, true, \ 1275119166Smtm "Retain parallel allocation buffers across scavenges.") \ 1276119166Smtm \ 1277119166Smtm product(intx, TargetPLABWastePct, 10, \ 1278119166Smtm "target wasted space in last buffer as pct of overall allocation")\ 1279119166Smtm \ 1280119166Smtm product(uintx, PLABWeight, 75, \ 1281119166Smtm "Percentage (0-100) used to weight the current sample when" \ 1282119166Smtm "computing exponentially decaying average for ResizePLAB.") \ 1283119166Smtm \ 1284119166Smtm product(bool, ResizePLAB, true, \ 1285119166Smtm "Dynamically resize (survivor space) promotion labs") \ 1286127345Sbrooks \ 1287127345Sbrooks product(bool, PrintPLAB, false, \ 1288127345Sbrooks "Print (survivor space) promotion labs sizing decisions") \ 1289127345Sbrooks \ 1290127345Sbrooks product(intx, ParGCArrayScanChunk, 50, \ 1291127345Sbrooks "Scan a subset and push remainder, if array is bigger than this") \ 1292137451Skeramida \ 1293127345Sbrooks product(intx, ParGCDesiredObjsFromOverflowList, 20, \ 1294127345Sbrooks "The desired number of objects to claim from the overflow list") \ 1295137451Skeramida \ 1296127345Sbrooks product(uintx, CMSParPromoteBlocksToClaim, 50, \ 1297137451Skeramida "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1298127345Sbrooks "parallel GC.") \ 1299131550Scperciva \ 1300131550Scperciva product(bool, AlwaysPreTouch, false, \ 1301 "It forces all freshly committed pages to be pre-touched.") \ 1302 \ 1303 product(bool, CMSUseOldDefaults, false, \ 1304 "A flag temporarily introduced to allow reverting to some older" \ 1305 "default settings; older as of 6.0 ") \ 1306 \ 1307 product(intx, CMSYoungGenPerWorker, 16*M, \ 1308 "The amount of young gen chosen by default per GC worker " \ 1309 "thread available ") \ 1310 \ 1311 product(bool, GCOverheadReporting, false, \ 1312 "Enables the GC overhead reporting facility") \ 1313 \ 1314 product(intx, GCOverheadReportingPeriodMS, 100, \ 1315 "Reporting period for conc GC overhead reporting, in ms ") \ 1316 \ 1317 product(bool, CMSIncrementalMode, false, \ 1318 "Whether CMS GC should operate in \"incremental\" mode") \ 1319 \ 1320 product(uintx, CMSIncrementalDutyCycle, 10, \ 1321 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1322 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1323 "value") \ 1324 \ 1325 product(bool, CMSIncrementalPacing, true, \ 1326 "Whether the CMS incremental mode duty cycle should be " \ 1327 "automatically adjusted") \ 1328 \ 1329 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1330 "Lower bound on the duty cycle when CMSIncrementalPacing is" \ 1331 "enabled (a percentage, 0-100).") \ 1332 \ 1333 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1334 "Percentage (0-100) used to add conservatism when computing the" \ 1335 "duty cycle.") \ 1336 \ 1337 product(uintx, CMSIncrementalOffset, 0, \ 1338 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1339 "is shifted to the right within the period between young GCs") \ 1340 \ 1341 product(uintx, CMSExpAvgFactor, 25, \ 1342 "Percentage (0-100) used to weight the current sample when" \ 1343 "computing exponential averages for CMS statistics.") \ 1344 \ 1345 product(uintx, CMS_FLSWeight, 50, \ 1346 "Percentage (0-100) used to weight the current sample when" \ 1347 "computing exponentially decating averages for CMS FLS statistics.") \ 1348 \ 1349 product(uintx, CMS_FLSPadding, 2, \ 1350 "The multiple of deviation from mean to use for buffering" \ 1351 "against volatility in free list demand.") \ 1352 \ 1353 product(uintx, FLSCoalescePolicy, 2, \ 1354 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1355 \ 1356 product(uintx, CMS_SweepWeight, 50, \ 1357 "Percentage (0-100) used to weight the current sample when" \ 1358 "computing exponentially decaying average for inter-sweep duration.") \ 1359 \ 1360 product(uintx, CMS_SweepPadding, 2, \ 1361 "The multiple of deviation from mean to use for buffering" \ 1362 "against volatility in inter-sweep duration.") \ 1363 \ 1364 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1365 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1366 " duration exceeds this threhold in milliseconds") \ 1367 \ 1368 develop(bool, CMSTraceIncrementalMode, false, \ 1369 "Trace CMS incremental mode") \ 1370 \ 1371 develop(bool, CMSTraceIncrementalPacing, false, \ 1372 "Trace CMS incremental mode pacing computation") \ 1373 \ 1374 develop(bool, CMSTraceThreadState, false, \ 1375 "Trace the CMS thread state (enable the trace_state() method)") \ 1376 \ 1377 product(bool, CMSClassUnloadingEnabled, false, \ 1378 "Whether class unloading enabled when using CMS GC") \ 1379 \ 1380 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1381 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1382 " for which classes may not be unloaded") \ 1383 \ 1384 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1385 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1386 \ 1387 product(bool, UseCMSCompactAtFullCollection, true, \ 1388 "Use mark sweep compact at full collections") \ 1389 \ 1390 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1391 "Number of CMS full collection done before compaction if > 0") \ 1392 \ 1393 develop(intx, CMSDictionaryChoice, 0, \ 1394 "Use BinaryTreeDictionary as default in the CMS generation") \ 1395 \ 1396 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1397 "Replenish and indexed free list with this number of chunks") \ 1398 \ 1399 product(bool, CMSLoopWarn, false, \ 1400 "Warn in case of excessive CMS looping") \ 1401 \ 1402 develop(bool, CMSOverflowEarlyRestoration, false, \ 1403 "Whether preserved marks should be restored early") \ 1404 \ 1405 product(uintx, CMSMarkStackSize, 32*K, \ 1406 "Size of CMS marking stack") \ 1407 \ 1408 product(uintx, CMSMarkStackSizeMax, 4*M, \ 1409 "Max size of CMS marking stack") \ 1410 \ 1411 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1412 "Whether we should simulate frequent marking stack / work queue" \ 1413 " overflow") \ 1414 \ 1415 notproduct(intx, CMSMarkStackOverflowInterval, 1000, \ 1416 "A per-thread `interval' counter that determines how frequently" \ 1417 " we simulate overflow; a smaller number increases frequency") \ 1418 \ 1419 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1420 "(Temporary, subject to experimentation)" \ 1421 "Maximum number of abortable preclean iterations, if > 0") \ 1422 \ 1423 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1424 "(Temporary, subject to experimentation)" \ 1425 "Maximum time in abortable preclean in ms") \ 1426 \ 1427 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1428 "(Temporary, subject to experimentation)" \ 1429 "Nominal minimum work per abortable preclean iteration") \ 1430 \ 1431 product(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1432 "(Temporary, subject to experimentation)" \ 1433 " Time that we sleep between iterations when not given" \ 1434 " enough work per iteration") \ 1435 \ 1436 product(uintx, CMSRescanMultiple, 32, \ 1437 "Size (in cards) of CMS parallel rescan task") \ 1438 \ 1439 product(uintx, CMSConcMarkMultiple, 32, \ 1440 "Size (in cards) of CMS concurrent MT marking task") \ 1441 \ 1442 product(uintx, CMSRevisitStackSize, 1*M, \ 1443 "Size of CMS KlassKlass revisit stack") \ 1444 \ 1445 product(bool, CMSAbortSemantics, false, \ 1446 "Whether abort-on-overflow semantics is implemented") \ 1447 \ 1448 product(bool, CMSParallelRemarkEnabled, true, \ 1449 "Whether parallel remark enabled (only if ParNewGC)") \ 1450 \ 1451 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1452 "Whether parallel remark of survivor space" \ 1453 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1454 \ 1455 product(bool, CMSPLABRecordAlways, true, \ 1456 "Whether to always record survivor space PLAB bdries" \ 1457 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1458 \ 1459 product(bool, CMSConcurrentMTEnabled, true, \ 1460 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1461 \ 1462 product(bool, CMSPermGenPrecleaningEnabled, true, \ 1463 "Whether concurrent precleaning enabled in perm gen" \ 1464 " (effective only when CMSPrecleaningEnabled is true)") \ 1465 \ 1466 product(bool, CMSPrecleaningEnabled, true, \ 1467 "Whether concurrent precleaning enabled") \ 1468 \ 1469 product(uintx, CMSPrecleanIter, 3, \ 1470 "Maximum number of precleaning iteration passes") \ 1471 \ 1472 product(uintx, CMSPrecleanNumerator, 2, \ 1473 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1474 " ratio") \ 1475 \ 1476 product(uintx, CMSPrecleanDenominator, 3, \ 1477 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1478 " ratio") \ 1479 \ 1480 product(bool, CMSPrecleanRefLists1, true, \ 1481 "Preclean ref lists during (initial) preclean phase") \ 1482 \ 1483 product(bool, CMSPrecleanRefLists2, false, \ 1484 "Preclean ref lists during abortable preclean phase") \ 1485 \ 1486 product(bool, CMSPrecleanSurvivors1, false, \ 1487 "Preclean survivors during (initial) preclean phase") \ 1488 \ 1489 product(bool, CMSPrecleanSurvivors2, true, \ 1490 "Preclean survivors during abortable preclean phase") \ 1491 \ 1492 product(uintx, CMSPrecleanThreshold, 1000, \ 1493 "Don't re-iterate if #dirty cards less than this") \ 1494 \ 1495 product(bool, CMSCleanOnEnter, true, \ 1496 "Clean-on-enter optimization for reducing number of dirty cards") \ 1497 \ 1498 product(uintx, CMSRemarkVerifyVariant, 1, \ 1499 "Choose variant (1,2) of verification following remark") \ 1500 \ 1501 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1502 "If Eden used is below this value, don't try to schedule remark") \ 1503 \ 1504 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1505 "The Eden occupancy % at which to try and schedule remark pause") \ 1506 \ 1507 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1508 "Start sampling Eden top at least before yg occupancy reaches" \ 1509 " 1/<ratio> of the size at which we plan to schedule remark") \ 1510 \ 1511 product(uintx, CMSSamplingGrain, 16*K, \ 1512 "The minimum distance between eden samples for CMS (see above)") \ 1513 \ 1514 product(bool, CMSScavengeBeforeRemark, false, \ 1515 "Attempt scavenge before the CMS remark step") \ 1516 \ 1517 develop(bool, CMSTraceSweeper, false, \ 1518 "Trace some actions of the CMS sweeper") \ 1519 \ 1520 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1521 "Don't drain below this size per parallel worker/thief") \ 1522 \ 1523 product(intx, CMSWaitDuration, 2000, \ 1524 "Time in milliseconds that CMS thread waits for young GC") \ 1525 \ 1526 product(bool, CMSYield, true, \ 1527 "Yield between steps of concurrent mark & sweep") \ 1528 \ 1529 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1530 "Bitmap operations should process at most this many bits" \ 1531 "between yields") \ 1532 \ 1533 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1534 "Verify that all refs across the FLS boundary " \ 1535 " are to valid objects") \ 1536 \ 1537 diagnostic(bool, FLSVerifyLists, false, \ 1538 "Do lots of (expensive) FreeListSpace verification") \ 1539 \ 1540 diagnostic(bool, FLSVerifyIndexTable, false, \ 1541 "Do lots of (expensive) FLS index table verification") \ 1542 \ 1543 develop(bool, FLSVerifyDictionary, false, \ 1544 "Do lots of (expensive) FLS dictionary verification") \ 1545 \ 1546 develop(bool, VerifyBlockOffsetArray, false, \ 1547 "Do (expensive!) block offset array verification") \ 1548 \ 1549 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \ 1550 "Maintain _unallocated_block in BlockOffsetArray" \ 1551 " (currently applicable only to CMS collector)") \ 1552 \ 1553 develop(bool, TraceCMSState, false, \ 1554 "Trace the state of the CMS collection") \ 1555 \ 1556 product(intx, RefDiscoveryPolicy, 0, \ 1557 "Whether reference-based(0) or referent-based(1)") \ 1558 \ 1559 product(bool, ParallelRefProcEnabled, false, \ 1560 "Enable parallel reference processing whenever possible") \ 1561 \ 1562 product(bool, ParallelRefProcBalancingEnabled, true, \ 1563 "Enable balancing of reference processing queues") \ 1564 \ 1565 product(intx, CMSTriggerRatio, 80, \ 1566 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1567 " allocated before a CMS collection cycle commences") \ 1568 \ 1569 product(intx, CMSTriggerPermRatio, 80, \ 1570 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \ 1571 " is allocated before a CMS collection cycle commences, that " \ 1572 " also collects the perm generation") \ 1573 \ 1574 product(uintx, CMSBootstrapOccupancy, 50, \ 1575 "Percentage CMS generation occupancy at which to " \ 1576 " initiate CMS collection for bootstrapping collection stats") \ 1577 \ 1578 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1579 "Percentage CMS generation occupancy to start a CMS collection " \ 1580 " cycle (A negative value means that CMSTriggerRatio is used)") \ 1581 \ 1582 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 1583 "Percentage CMS perm generation occupancy to start a CMScollection"\ 1584 " cycle (A negative value means that CMSTriggerPermRatio is used)")\ 1585 \ 1586 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1587 "Only use occupancy as a crierion for starting a CMS collection") \ 1588 \ 1589 product(intx, CMSIsTooFullPercentage, 98, \ 1590 "An absolute ceiling above which CMS will always consider the" \ 1591 " perm gen ripe for collection") \ 1592 \ 1593 develop(bool, CMSTestInFreeList, false, \ 1594 "Check if the coalesced range is already in the " \ 1595 "free lists as claimed.") \ 1596 \ 1597 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1598 "Check that all the garbage collected was returned to the " \ 1599 "free lists.") \ 1600 \ 1601 notproduct(bool, ScavengeALot, false, \ 1602 "Force scavenge at every Nth exit from the runtime system " \ 1603 "(N=ScavengeALotInterval)") \ 1604 \ 1605 develop(bool, FullGCALot, false, \ 1606 "Force full gc at every Nth exit from the runtime system " \ 1607 "(N=FullGCALotInterval)") \ 1608 \ 1609 notproduct(bool, GCALotAtAllSafepoints, false, \ 1610 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1611 \ 1612 product(bool, HandlePromotionFailure, true, \ 1613 "The youngest generation collection does not require" \ 1614 " a guarantee of full promotion of all live objects.") \ 1615 \ 1616 notproduct(bool, PromotionFailureALot, false, \ 1617 "Use promotion failure handling on every youngest generation " \ 1618 "collection") \ 1619 \ 1620 develop(uintx, PromotionFailureALotCount, 1000, \ 1621 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1622 "refill attempts (ParNew) or promotion attempts " \ 1623 "(other young collectors) ") \ 1624 \ 1625 develop(uintx, PromotionFailureALotInterval, 5, \ 1626 "Total collections between promotion failures alot") \ 1627 \ 1628 develop(intx, WorkStealingSleepMillis, 1, \ 1629 "Sleep time when sleep is used for yields") \ 1630 \ 1631 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ 1632 "Number of yields before a sleep is done during workstealing") \ 1633 \ 1634 product(uintx, PreserveMarkStackSize, 40, \ 1635 "Size for stack used in promotion failure handling") \ 1636 \ 1637 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1638 \ 1639 product_pd(bool, ResizeTLAB, \ 1640 "Dynamically resize tlab size for threads") \ 1641 \ 1642 product(bool, ZeroTLAB, false, \ 1643 "Zero out the newly created TLAB") \ 1644 \ 1645 product(bool, FastTLABRefill, true, \ 1646 "Use fast TLAB refill code") \ 1647 \ 1648 product(bool, PrintTLAB, false, \ 1649 "Print various TLAB related information") \ 1650 \ 1651 product(bool, TLABStats, true, \ 1652 "Print various TLAB related information") \ 1653 \ 1654 product_pd(bool, NeverActAsServerClassMachine, \ 1655 "Never act like a server-class machine") \ 1656 \ 1657 product(bool, AlwaysActAsServerClassMachine, false, \ 1658 "Always act like a server-class machine") \ 1659 \ 1660 product_pd(uintx, DefaultMaxRAM, \ 1661 "Maximum real memory size for setting server class heap size") \ 1662 \ 1663 product(uintx, DefaultMaxRAMFraction, 4, \ 1664 "Fraction (1/n) of real memory used for server class max heap") \ 1665 \ 1666 product(uintx, DefaultInitialRAMFraction, 64, \ 1667 "Fraction (1/n) of real memory used for server class initial heap") \ 1668 \ 1669 product(bool, UseAutoGCSelectPolicy, false, \ 1670 "Use automatic collection selection policy") \ 1671 \ 1672 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1673 "Automatic GC selection pause threshhold in ms") \ 1674 \ 1675 product(bool, UseAdaptiveSizePolicy, true, \ 1676 "Use adaptive generation sizing policies") \ 1677 \ 1678 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1679 "Use adaptive survivor sizing policies") \ 1680 \ 1681 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1682 "Use adaptive young-old sizing policies at minor collections") \ 1683 \ 1684 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1685 "Use adaptive young-old sizing policies at major collections") \ 1686 \ 1687 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1688 "Use statistics from System.GC for adaptive size policy") \ 1689 \ 1690 product(bool, UseAdaptiveGCBoundary, false, \ 1691 "Allow young-old boundary to move") \ 1692 \ 1693 develop(bool, TraceAdaptiveGCBoundary, false, \ 1694 "Trace young-old boundary moves") \ 1695 \ 1696 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1697 "Resize the virtual spaces of the young or old generations") \ 1698 \ 1699 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1700 "Policy for changeing generation size for throughput goals") \ 1701 \ 1702 product(uintx, AdaptiveSizePausePolicy, 0, \ 1703 "Policy for changing generation size for pause goals") \ 1704 \ 1705 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1706 "Adjust tenured generation to achive a minor pause goal") \ 1707 \ 1708 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 1709 "Adjust young generation to achive a major pause goal") \ 1710 \ 1711 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 1712 "Number of steps where heuristics is used before data is used") \ 1713 \ 1714 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 1715 "Number of collections before the adaptive sizing is started") \ 1716 \ 1717 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 1718 "Collecton interval for printing information, zero => never") \ 1719 \ 1720 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 1721 "Use adaptive minimum footprint as a goal") \ 1722 \ 1723 product(uintx, AdaptiveSizePolicyWeight, 10, \ 1724 "Weight given to exponential resizing, between 0 and 100") \ 1725 \ 1726 product(uintx, AdaptiveTimeWeight, 25, \ 1727 "Weight given to time in adaptive policy, between 0 and 100") \ 1728 \ 1729 product(uintx, PausePadding, 1, \ 1730 "How much buffer to keep for pause time") \ 1731 \ 1732 product(uintx, PromotedPadding, 3, \ 1733 "How much buffer to keep for promotion failure") \ 1734 \ 1735 product(uintx, SurvivorPadding, 3, \ 1736 "How much buffer to keep for survivor overflow") \ 1737 \ 1738 product(uintx, AdaptivePermSizeWeight, 20, \ 1739 "Weight for perm gen exponential resizing, between 0 and 100") \ 1740 \ 1741 product(uintx, PermGenPadding, 3, \ 1742 "How much buffer to keep for perm gen sizing") \ 1743 \ 1744 product(uintx, ThresholdTolerance, 10, \ 1745 "Allowed collection cost difference between generations") \ 1746 \ 1747 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 1748 "If collection costs are within margin, reduce both by full delta") \ 1749 \ 1750 product(uintx, YoungGenerationSizeIncrement, 20, \ 1751 "Adaptive size percentage change in young generation") \ 1752 \ 1753 product(uintx, YoungGenerationSizeSupplement, 80, \ 1754 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 1755 \ 1756 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 1757 "Decay factor to YoungedGenerationSizeSupplement") \ 1758 \ 1759 product(uintx, TenuredGenerationSizeIncrement, 20, \ 1760 "Adaptive size percentage change in tenured generation") \ 1761 \ 1762 product(uintx, TenuredGenerationSizeSupplement, 80, \ 1763 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 1764 \ 1765 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 1766 "Decay factor to TenuredGenerationSizeIncrement") \ 1767 \ 1768 product(uintx, MaxGCPauseMillis, max_uintx, \ 1769 "Adaptive size policy maximum GC pause time goal in msec") \ 1770 \ 1771 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 1772 "Adaptive size policy maximum GC minor pause time goal in msec") \ 1773 \ 1774 product(uintx, GCTimeRatio, 99, \ 1775 "Adaptive size policy application time to GC time ratio") \ 1776 \ 1777 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 1778 "Adaptive size scale down factor for shrinking") \ 1779 \ 1780 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 1781 "Adaptive size decays the major cost for long major intervals") \ 1782 \ 1783 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 1784 "Time scale over which major costs decay") \ 1785 \ 1786 product(uintx, MinSurvivorRatio, 3, \ 1787 "Minimum ratio of young generation/survivor space size") \ 1788 \ 1789 product(uintx, InitialSurvivorRatio, 8, \ 1790 "Initial ratio of eden/survivor space size") \ 1791 \ 1792 product(uintx, BaseFootPrintEstimate, 256*M, \ 1793 "Estimate of footprint other than Java Heap") \ 1794 \ 1795 product(bool, UseGCOverheadLimit, true, \ 1796 "Use policy to limit of proportion of time spent in GC " \ 1797 "before an OutOfMemory error is thrown") \ 1798 \ 1799 product(uintx, GCTimeLimit, 98, \ 1800 "Limit of proportion of time spent in GC before an OutOfMemory" \ 1801 "error is thrown (used with GCHeapFreeLimit)") \ 1802 \ 1803 product(uintx, GCHeapFreeLimit, 2, \ 1804 "Minimum percentage of free space after a full GC before an " \ 1805 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 1806 \ 1807 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 1808 "Number of consecutive collections before gc time limit fires") \ 1809 \ 1810 product(bool, PrintAdaptiveSizePolicy, false, \ 1811 "Print information about AdaptiveSizePolicy") \ 1812 \ 1813 product(intx, PrefetchCopyIntervalInBytes, -1, \ 1814 "How far ahead to prefetch destination area (<= 0 means off)") \ 1815 \ 1816 product(intx, PrefetchScanIntervalInBytes, -1, \ 1817 "How far ahead to prefetch scan area (<= 0 means off)") \ 1818 \ 1819 product(intx, PrefetchFieldsAhead, -1, \ 1820 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 1821 \ 1822 develop(bool, UsePrefetchQueue, true, \ 1823 "Use the prefetch queue during PS promotion") \ 1824 \ 1825 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 1826 "Verify system before exiting") \ 1827 \ 1828 diagnostic(bool, VerifyBeforeGC, false, \ 1829 "Verify memory system before GC") \ 1830 \ 1831 diagnostic(bool, VerifyAfterGC, false, \ 1832 "Verify memory system after GC") \ 1833 \ 1834 diagnostic(bool, VerifyDuringGC, false, \ 1835 "Verify memory system during GC (between phases)") \ 1836 \ 1837 diagnostic(bool, GCParallelVerificationEnabled, true, \ 1838 "Enable parallel memory system verification") \ 1839 \ 1840 diagnostic(bool, VerifyRememberedSets, false, \ 1841 "Verify GC remembered sets") \ 1842 \ 1843 diagnostic(bool, VerifyObjectStartArray, true, \ 1844 "Verify GC object start array if verify before/after") \ 1845 \ 1846 product(bool, DisableExplicitGC, false, \ 1847 "Tells whether calling System.gc() does a full GC") \ 1848 \ 1849 notproduct(bool, CheckMemoryInitialization, false, \ 1850 "Checks memory initialization") \ 1851 \ 1852 product(bool, CollectGen0First, false, \ 1853 "Collect youngest generation before each full GC") \ 1854 \ 1855 diagnostic(bool, BindCMSThreadToCPU, false, \ 1856 "Bind CMS Thread to CPU if possible") \ 1857 \ 1858 diagnostic(uintx, CPUForCMSThread, 0, \ 1859 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 1860 \ 1861 product(bool, BindGCTaskThreadsToCPUs, false, \ 1862 "Bind GCTaskThreads to CPUs if possible") \ 1863 \ 1864 product(bool, UseGCTaskAffinity, false, \ 1865 "Use worker affinity when asking for GCTasks") \ 1866 \ 1867 product(uintx, ProcessDistributionStride, 4, \ 1868 "Stride through processors when distributing processes") \ 1869 \ 1870 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 1871 "number of times the coordinator GC thread will sleep while " \ 1872 "yielding before giving up and resuming GC") \ 1873 \ 1874 product(uintx, CMSYieldSleepCount, 0, \ 1875 "number of times a GC thread (minus the coordinator) " \ 1876 "will sleep while yielding before giving up and resuming GC") \ 1877 \ 1878 notproduct(bool, PrintFlagsFinal, false, \ 1879 "Print all command line flags after argument processing") \ 1880 \ 1881 /* gc tracing */ \ 1882 manageable(bool, PrintGC, false, \ 1883 "Print message at garbage collect") \ 1884 \ 1885 manageable(bool, PrintGCDetails, false, \ 1886 "Print more details at garbage collect") \ 1887 \ 1888 manageable(bool, PrintGCDateStamps, false, \ 1889 "Print date stamps at garbage collect") \ 1890 \ 1891 manageable(bool, PrintGCTimeStamps, false, \ 1892 "Print timestamps at garbage collect") \ 1893 \ 1894 product(bool, PrintGCTaskTimeStamps, false, \ 1895 "Print timestamps for individual gc worker thread tasks") \ 1896 \ 1897 develop(intx, ConcGCYieldTimeout, 0, \ 1898 "If non-zero, assert that GC threads yield within this # of ms.") \ 1899 \ 1900 notproduct(bool, TraceMarkSweep, false, \ 1901 "Trace mark sweep") \ 1902 \ 1903 product(bool, PrintReferenceGC, false, \ 1904 "Print times spent handling reference objects during GC " \ 1905 " (enabled only when PrintGCDetails)") \ 1906 \ 1907 develop(bool, TraceReferenceGC, false, \ 1908 "Trace handling of soft/weak/final/phantom references") \ 1909 \ 1910 develop(bool, TraceFinalizerRegistration, false, \ 1911 "Trace registration of final references") \ 1912 \ 1913 notproduct(bool, TraceScavenge, false, \ 1914 "Trace scavenge") \ 1915 \ 1916 product_rw(bool, TraceClassLoading, false, \ 1917 "Trace all classes loaded") \ 1918 \ 1919 product(bool, TraceClassLoadingPreorder, false, \ 1920 "Trace all classes loaded in order referenced (not loaded)") \ 1921 \ 1922 product_rw(bool, TraceClassUnloading, false, \ 1923 "Trace unloading of classes") \ 1924 \ 1925 product_rw(bool, TraceLoaderConstraints, false, \ 1926 "Trace loader constraints") \ 1927 \ 1928 product(bool, TraceGen0Time, false, \ 1929 "Trace accumulated time for Gen 0 collection") \ 1930 \ 1931 product(bool, TraceGen1Time, false, \ 1932 "Trace accumulated time for Gen 1 collection") \ 1933 \ 1934 product(bool, PrintTenuringDistribution, false, \ 1935 "Print tenuring age information") \ 1936 \ 1937 product_rw(bool, PrintHeapAtGC, false, \ 1938 "Print heap layout before and after each GC") \ 1939 \ 1940 product(bool, PrintHeapAtSIGBREAK, true, \ 1941 "Print heap layout in response to SIGBREAK") \ 1942 \ 1943 manageable(bool, PrintClassHistogram, false, \ 1944 "Print a histogram of class instances") \ 1945 \ 1946 develop(bool, TraceWorkGang, false, \ 1947 "Trace activities of work gangs") \ 1948 \ 1949 product(bool, TraceParallelOldGCTasks, false, \ 1950 "Trace multithreaded GC activity") \ 1951 \ 1952 develop(bool, TraceBlockOffsetTable, false, \ 1953 "Print BlockOffsetTable maps") \ 1954 \ 1955 develop(bool, TraceCardTableModRefBS, false, \ 1956 "Print CardTableModRefBS maps") \ 1957 \ 1958 develop(bool, TraceGCTaskManager, false, \ 1959 "Trace actions of the GC task manager") \ 1960 \ 1961 develop(bool, TraceGCTaskQueue, false, \ 1962 "Trace actions of the GC task queues") \ 1963 \ 1964 develop(bool, TraceGCTaskThread, false, \ 1965 "Trace actions of the GC task threads") \ 1966 \ 1967 product(bool, PrintParallelOldGCPhaseTimes, false, \ 1968 "Print the time taken by each parallel old gc phase." \ 1969 "PrintGCDetails must also be enabled.") \ 1970 \ 1971 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 1972 "Trace parallel old gc marking phase") \ 1973 \ 1974 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 1975 "Trace parallel old gc summary phase") \ 1976 \ 1977 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 1978 "Trace parallel old gc compaction phase") \ 1979 \ 1980 develop(bool, TraceParallelOldGCDensePrefix, false, \ 1981 "Trace parallel old gc dense prefix computation") \ 1982 \ 1983 develop(bool, IgnoreLibthreadGPFault, false, \ 1984 "Suppress workaround for libthread GP fault") \ 1985 \ 1986 product(bool, PrintJNIGCStalls, false, \ 1987 "Print diagnostic message when GC is stalled" \ 1988 "by JNI critical section") \ 1989 \ 1990 /* JVMTI heap profiling */ \ 1991 \ 1992 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1993 "Trace JVMTI object tagging calls") \ 1994 \ 1995 diagnostic(bool, VerifyBeforeIteration, false, \ 1996 "Verify memory system before JVMTI iteration") \ 1997 \ 1998 /* compiler interface */ \ 1999 \ 2000 develop(bool, CIPrintCompilerName, false, \ 2001 "when CIPrint is active, print the name of the active compiler") \ 2002 \ 2003 develop(bool, CIPrintCompileQueue, false, \ 2004 "display the contents of the compile queue whenever a " \ 2005 "compilation is enqueued") \ 2006 \ 2007 develop(bool, CIPrintRequests, false, \ 2008 "display every request for compilation") \ 2009 \ 2010 product(bool, CITime, false, \ 2011 "collect timing information for compilation") \ 2012 \ 2013 develop(bool, CITimeEach, false, \ 2014 "display timing information after each successful compilation") \ 2015 \ 2016 develop(bool, CICountOSR, true, \ 2017 "use a separate counter when assigning ids to osr compilations") \ 2018 \ 2019 develop(bool, CICompileNatives, true, \ 2020 "compile native methods if supported by the compiler") \ 2021 \ 2022 develop_pd(bool, CICompileOSR, \ 2023 "compile on stack replacement methods if supported by the " \ 2024 "compiler") \ 2025 \ 2026 develop(bool, CIPrintMethodCodes, false, \ 2027 "print method bytecodes of the compiled code") \ 2028 \ 2029 develop(bool, CIPrintTypeFlow, false, \ 2030 "print the results of ciTypeFlow analysis") \ 2031 \ 2032 develop(bool, CITraceTypeFlow, false, \ 2033 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2034 \ 2035 develop(intx, CICloneLoopTestLimit, 100, \ 2036 "size limit for blocks heuristically cloned in ciTypeFlow") \ 2037 \ 2038 /* temp diagnostics */ \ 2039 \ 2040 diagnostic(bool, TraceRedundantCompiles, false, \ 2041 "Have compile broker print when a request already in the queue is"\ 2042 " requested again") \ 2043 \ 2044 diagnostic(bool, InitialCompileFast, false, \ 2045 "Initial compile at CompLevel_fast_compile") \ 2046 \ 2047 diagnostic(bool, InitialCompileReallyFast, false, \ 2048 "Initial compile at CompLevel_really_fast_compile (no profile)") \ 2049 \ 2050 diagnostic(bool, FullProfileOnReInterpret, true, \ 2051 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 2052 \ 2053 /* compiler */ \ 2054 \ 2055 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2056 "Number of compiler threads to run") \ 2057 \ 2058 product(intx, CompilationPolicyChoice, 0, \ 2059 "which compilation policy (0/1)") \ 2060 \ 2061 develop(bool, UseStackBanging, true, \ 2062 "use stack banging for stack overflow checks (required for " \ 2063 "proper StackOverflow handling; disable only to measure cost " \ 2064 "of stackbanging)") \ 2065 \ 2066 develop(bool, Use24BitFPMode, true, \ 2067 "Set 24-bit FPU mode on a per-compile basis ") \ 2068 \ 2069 develop(bool, Use24BitFP, true, \ 2070 "use FP instructions that produce 24-bit precise results") \ 2071 \ 2072 develop(bool, UseStrictFP, true, \ 2073 "use strict fp if modifier strictfp is set") \ 2074 \ 2075 develop(bool, GenerateSynchronizationCode, true, \ 2076 "generate locking/unlocking code for synchronized methods and " \ 2077 "monitors") \ 2078 \ 2079 develop(bool, GenerateCompilerNullChecks, true, \ 2080 "Generate explicit null checks for loads/stores/calls") \ 2081 \ 2082 develop(bool, GenerateRangeChecks, true, \ 2083 "Generate range checks for array accesses") \ 2084 \ 2085 develop_pd(bool, ImplicitNullChecks, \ 2086 "generate code for implicit null checks") \ 2087 \ 2088 product(bool, PrintSafepointStatistics, false, \ 2089 "print statistics about safepoint synchronization") \ 2090 \ 2091 product(intx, PrintSafepointStatisticsCount, 300, \ 2092 "total number of safepoint statistics collected " \ 2093 "before printing them out") \ 2094 \ 2095 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2096 "print safepoint statistics only when safepoint takes" \ 2097 " more than PrintSafepointSatisticsTimeout in millis") \ 2098 \ 2099 develop(bool, InlineAccessors, true, \ 2100 "inline accessor methods (get/set)") \ 2101 \ 2102 product(bool, Inline, true, \ 2103 "enable inlining") \ 2104 \ 2105 product(bool, ClipInlining, true, \ 2106 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2107 \ 2108 develop(bool, UseCHA, true, \ 2109 "enable CHA") \ 2110 \ 2111 product(bool, UseTypeProfile, true, \ 2112 "Check interpreter profile for historically monomorphic calls") \ 2113 \ 2114 product(intx, TypeProfileMajorReceiverPercent, 90, \ 2115 "% of major receiver type to all profiled receivers") \ 2116 \ 2117 notproduct(bool, TimeCompiler, false, \ 2118 "time the compiler") \ 2119 \ 2120 notproduct(bool, TimeCompiler2, false, \ 2121 "detailed time the compiler (requires +TimeCompiler)") \ 2122 \ 2123 diagnostic(bool, PrintInlining, false, \ 2124 "prints inlining optimizations") \ 2125 \ 2126 diagnostic(bool, PrintIntrinsics, false, \ 2127 "prints attempted and successful inlining of intrinsics") \ 2128 \ 2129 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2130 "do not expand intrinsics whose (internal) names appear here") \ 2131 \ 2132 develop(bool, StressReflectiveCode, false, \ 2133 "Use inexact types at allocations, etc., to test reflection") \ 2134 \ 2135 develop(bool, EagerInitialization, false, \ 2136 "Eagerly initialize classes if possible") \ 2137 \ 2138 product(bool, Tier1UpdateMethodData, trueInTiered, \ 2139 "Update methodDataOops in Tier1-generated code") \ 2140 \ 2141 develop(bool, TraceMethodReplacement, false, \ 2142 "Print when methods are replaced do to recompilation") \ 2143 \ 2144 develop(bool, PrintMethodFlushing, false, \ 2145 "print the nmethods being flushed") \ 2146 \ 2147 notproduct(bool, LogMultipleMutexLocking, false, \ 2148 "log locking and unlocking of mutexes (only if multiple locks " \ 2149 "are held)") \ 2150 \ 2151 develop(bool, UseRelocIndex, false, \ 2152 "use an index to speed random access to relocations") \ 2153 \ 2154 develop(bool, StressCodeBuffers, false, \ 2155 "Exercise code buffer expansion and other rare state changes") \ 2156 \ 2157 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2158 "Generate extra debugging info for non-safepoints in nmethods") \ 2159 \ 2160 diagnostic(bool, DebugInlinedCalls, true, \ 2161 "If false, restricts profiled locations to the root method only") \ 2162 \ 2163 product(bool, PrintVMOptions, trueInDebug, \ 2164 "print VM flag settings") \ 2165 \ 2166 diagnostic(bool, SerializeVMOutput, true, \ 2167 "Use a mutex to serialize output to tty and hotspot.log") \ 2168 \ 2169 diagnostic(bool, DisplayVMOutput, true, \ 2170 "Display all VM output on the tty, independently of LogVMOutput") \ 2171 \ 2172 diagnostic(bool, LogVMOutput, trueInDebug, \ 2173 "Save VM output to hotspot.log, or to LogFile") \ 2174 \ 2175 diagnostic(ccstr, LogFile, NULL, \ 2176 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2177 \ 2178 product(ccstr, ErrorFile, NULL, \ 2179 "If an error occurs, save the error data to this file " \ 2180 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2181 \ 2182 product(bool, DisplayVMOutputToStderr, false, \ 2183 "If DisplayVMOutput is true, display all VM output to stderr") \ 2184 \ 2185 product(bool, DisplayVMOutputToStdout, false, \ 2186 "If DisplayVMOutput is true, display all VM output to stdout") \ 2187 \ 2188 product(bool, UseHeavyMonitors, false, \ 2189 "use heavyweight instead of lightweight Java monitors") \ 2190 \ 2191 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2192 "print histogram of the symbol table") \ 2193 \ 2194 notproduct(bool, ExitVMOnVerifyError, false, \ 2195 "standard exit from VM if bytecode verify error " \ 2196 "(only in debug mode)") \ 2197 \ 2198 notproduct(ccstr, AbortVMOnException, NULL, \ 2199 "Call fatal if this exception is thrown. Example: " \ 2200 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2201 \ 2202 develop(bool, DebugVtables, false, \ 2203 "add debugging code to vtable dispatch") \ 2204 \ 2205 develop(bool, PrintVtables, false, \ 2206 "print vtables when printing klass") \ 2207 \ 2208 notproduct(bool, PrintVtableStats, false, \ 2209 "print vtables stats at end of run") \ 2210 \ 2211 develop(bool, TraceCreateZombies, false, \ 2212 "trace creation of zombie nmethods") \ 2213 \ 2214 notproduct(bool, IgnoreLockingAssertions, false, \ 2215 "disable locking assertions (for speed)") \ 2216 \ 2217 notproduct(bool, VerifyLoopOptimizations, false, \ 2218 "verify major loop optimizations") \ 2219 \ 2220 product(bool, RangeCheckElimination, true, \ 2221 "Split loop iterations to eliminate range checks") \ 2222 \ 2223 develop_pd(bool, UncommonNullCast, \ 2224 "track occurrences of null in casts; adjust compiler tactics") \ 2225 \ 2226 develop(bool, TypeProfileCasts, true, \ 2227 "treat casts like calls for purposes of type profiling") \ 2228 \ 2229 develop(bool, MonomorphicArrayCheck, true, \ 2230 "Uncommon-trap array store checks that require full type check") \ 2231 \ 2232 develop(bool, DelayCompilationDuringStartup, true, \ 2233 "Delay invoking the compiler until main application class is " \ 2234 "loaded") \ 2235 \ 2236 develop(bool, CompileTheWorld, false, \ 2237 "Compile all methods in all classes in bootstrap class path " \ 2238 "(stress test)") \ 2239 \ 2240 develop(bool, CompileTheWorldPreloadClasses, true, \ 2241 "Preload all classes used by a class before start loading") \ 2242 \ 2243 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ 2244 "Compile all methods although class initializer failed") \ 2245 \ 2246 develop(bool, TraceIterativeGVN, false, \ 2247 "Print progress during Iterative Global Value Numbering") \ 2248 \ 2249 develop(bool, FillDelaySlots, true, \ 2250 "Fill delay slots (on SPARC only)") \ 2251 \ 2252 develop(bool, VerifyIterativeGVN, false, \ 2253 "Verify Def-Use modifications during sparse Iterative Global " \ 2254 "Value Numbering") \ 2255 \ 2256 notproduct(bool, TracePhaseCCP, false, \ 2257 "Print progress during Conditional Constant Propagation") \ 2258 \ 2259 develop(bool, TimeLivenessAnalysis, false, \ 2260 "Time computation of bytecode liveness analysis") \ 2261 \ 2262 develop(bool, TraceLivenessGen, false, \ 2263 "Trace the generation of liveness analysis information") \ 2264 \ 2265 notproduct(bool, TraceLivenessQuery, false, \ 2266 "Trace queries of liveness analysis information") \ 2267 \ 2268 notproduct(bool, CollectIndexSetStatistics, false, \ 2269 "Collect information about IndexSets") \ 2270 \ 2271 develop(bool, PrintDominators, false, \ 2272 "Print out dominator trees for GVN") \ 2273 \ 2274 develop(bool, UseLoopSafepoints, true, \ 2275 "Generate Safepoint nodes in every loop") \ 2276 \ 2277 notproduct(bool, TraceCISCSpill, false, \ 2278 "Trace allocators use of cisc spillable instructions") \ 2279 \ 2280 notproduct(bool, TraceSpilling, false, \ 2281 "Trace spilling") \ 2282 \ 2283 develop(bool, DeutschShiffmanExceptions, true, \ 2284 "Fast check to find exception handler for precisely typed " \ 2285 "exceptions") \ 2286 \ 2287 product(bool, SplitIfBlocks, true, \ 2288 "Clone compares and control flow through merge points to fold " \ 2289 "some branches") \ 2290 \ 2291 develop(intx, FastAllocateSizeLimit, 128*K, \ 2292 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2293 "Inline allocations larger than this in doublewords must go slow")\ 2294 \ 2295 product(bool, AggressiveOpts, false, \ 2296 "Enable aggressive optimizations - see arguments.cpp") \ 2297 \ 2298 product(bool, UseStringCache, false, \ 2299 "Enable String cache capabilities on String.java") \ 2300 \ 2301 /* statistics */ \ 2302 develop(bool, UseVTune, false, \ 2303 "enable support for Intel's VTune profiler") \ 2304 \ 2305 develop(bool, CountCompiledCalls, false, \ 2306 "counts method invocations") \ 2307 \ 2308 notproduct(bool, CountRuntimeCalls, false, \ 2309 "counts VM runtime calls") \ 2310 \ 2311 develop(bool, CountJNICalls, false, \ 2312 "counts jni method invocations") \ 2313 \ 2314 notproduct(bool, CountJVMCalls, false, \ 2315 "counts jvm method invocations") \ 2316 \ 2317 notproduct(bool, CountRemovableExceptions, false, \ 2318 "count exceptions that could be replaced by branches due to " \ 2319 "inlining") \ 2320 \ 2321 notproduct(bool, ICMissHistogram, false, \ 2322 "produce histogram of IC misses") \ 2323 \ 2324 notproduct(bool, PrintClassStatistics, false, \ 2325 "prints class statistics at end of run") \ 2326 \ 2327 notproduct(bool, PrintMethodStatistics, false, \ 2328 "prints method statistics at end of run") \ 2329 \ 2330 /* interpreter */ \ 2331 develop(bool, ClearInterpreterLocals, false, \ 2332 "Always clear local variables of interpreter activations upon " \ 2333 "entry") \ 2334 \ 2335 product_pd(bool, RewriteBytecodes, \ 2336 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2337 \ 2338 product_pd(bool, RewriteFrequentPairs, \ 2339 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2340 \ 2341 diagnostic(bool, PrintInterpreter, false, \ 2342 "Prints the generated interpreter code") \ 2343 \ 2344 product(bool, UseInterpreter, true, \ 2345 "Use interpreter for non-compiled methods") \ 2346 \ 2347 develop(bool, UseFastSignatureHandlers, true, \ 2348 "Use fast signature handlers for native calls") \ 2349 \ 2350 develop(bool, UseV8InstrsOnly, false, \ 2351 "Use SPARC-V8 Compliant instruction subset") \ 2352 \ 2353 product(bool, UseNiagaraInstrs, false, \ 2354 "Use Niagara-efficient instruction subset") \ 2355 \ 2356 develop(bool, UseCASForSwap, false, \ 2357 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2358 \ 2359 product(bool, UseLoopCounter, true, \ 2360 "Increment invocation counter on backward branch") \ 2361 \ 2362 product(bool, UseFastEmptyMethods, true, \ 2363 "Use fast method entry code for empty methods") \ 2364 \ 2365 product(bool, UseFastAccessorMethods, true, \ 2366 "Use fast method entry code for accessor methods") \ 2367 \ 2368 product_pd(bool, UseOnStackReplacement, \ 2369 "Use on stack replacement, calls runtime if invoc. counter " \ 2370 "overflows in loop") \ 2371 \ 2372 notproduct(bool, TraceOnStackReplacement, false, \ 2373 "Trace on stack replacement") \ 2374 \ 2375 develop(bool, PoisonOSREntry, true, \ 2376 "Detect abnormal calls to OSR code") \ 2377 \ 2378 product_pd(bool, PreferInterpreterNativeStubs, \ 2379 "Use always interpreter stubs for native methods invoked via " \ 2380 "interpreter") \ 2381 \ 2382 develop(bool, CountBytecodes, false, \ 2383 "Count number of bytecodes executed") \ 2384 \ 2385 develop(bool, PrintBytecodeHistogram, false, \ 2386 "Print histogram of the executed bytecodes") \ 2387 \ 2388 develop(bool, PrintBytecodePairHistogram, false, \ 2389 "Print histogram of the executed bytecode pairs") \ 2390 \ 2391 diagnostic(bool, PrintSignatureHandlers, false, \ 2392 "Print code generated for native method signature handlers") \ 2393 \ 2394 develop(bool, VerifyOops, false, \ 2395 "Do plausibility checks for oops") \ 2396 \ 2397 develop(bool, CheckUnhandledOops, false, \ 2398 "Check for unhandled oops in VM code") \ 2399 \ 2400 develop(bool, VerifyJNIFields, trueInDebug, \ 2401 "Verify jfieldIDs for instance fields") \ 2402 \ 2403 notproduct(bool, VerifyJNIEnvThread, false, \ 2404 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2405 "from JNI") \ 2406 \ 2407 develop(bool, VerifyFPU, false, \ 2408 "Verify FPU state (check for NaN's, etc.)") \ 2409 \ 2410 develop(bool, VerifyThread, false, \ 2411 "Watch the thread register for corruption (SPARC only)") \ 2412 \ 2413 develop(bool, VerifyActivationFrameSize, false, \ 2414 "Verify that activation frame didn't become smaller than its " \ 2415 "minimal size") \ 2416 \ 2417 develop(bool, TraceFrequencyInlining, false, \ 2418 "Trace frequency based inlining") \ 2419 \ 2420 notproduct(bool, TraceTypeProfile, false, \ 2421 "Trace type profile") \ 2422 \ 2423 develop_pd(bool, InlineIntrinsics, \ 2424 "Inline intrinsics that can be statically resolved") \ 2425 \ 2426 product_pd(bool, ProfileInterpreter, \ 2427 "Profile at the bytecode level during interpretation") \ 2428 \ 2429 develop_pd(bool, ProfileTraps, \ 2430 "Profile deoptimization traps at the bytecode level") \ 2431 \ 2432 product(intx, ProfileMaturityPercentage, 20, \ 2433 "number of method invocations/branches (expressed as % of " \ 2434 "CompileThreshold) before using the method's profile") \ 2435 \ 2436 develop(bool, PrintMethodData, false, \ 2437 "Print the results of +ProfileInterpreter at end of run") \ 2438 \ 2439 develop(bool, VerifyDataPointer, trueInDebug, \ 2440 "Verify the method data pointer during interpreter profiling") \ 2441 \ 2442 develop(bool, VerifyCompiledCode, false, \ 2443 "Include miscellaneous runtime verifications in nmethod code; " \ 2444 "off by default because it disturbs nmethod size heuristics.") \ 2445 \ 2446 \ 2447 /* compilation */ \ 2448 product(bool, UseCompiler, true, \ 2449 "use compilation") \ 2450 \ 2451 develop(bool, TraceCompilationPolicy, false, \ 2452 "Trace compilation policy") \ 2453 \ 2454 develop(bool, TimeCompilationPolicy, false, \ 2455 "Time the compilation policy") \ 2456 \ 2457 product(bool, UseCounterDecay, true, \ 2458 "adjust recompilation counters") \ 2459 \ 2460 develop(intx, CounterHalfLifeTime, 30, \ 2461 "half-life time of invocation counters (in secs)") \ 2462 \ 2463 develop(intx, CounterDecayMinIntervalLength, 500, \ 2464 "Min. ms. between invocation of CounterDecay") \ 2465 \ 2466 product(bool, AlwaysCompileLoopMethods, false, \ 2467 "when using recompilation, never interpret methods " \ 2468 "containing loops") \ 2469 \ 2470 product(bool, DontCompileHugeMethods, true, \ 2471 "don't compile methods > HugeMethodLimit") \ 2472 \ 2473 /* Bytecode escape analysis estimation. */ \ 2474 product(bool, EstimateArgEscape, true, \ 2475 "Analyze bytecodes to estimate escape state of arguments") \ 2476 \ 2477 product(intx, BCEATraceLevel, 0, \ 2478 "How much tracing to do of bytecode escape analysis estimates") \ 2479 \ 2480 product(intx, MaxBCEAEstimateLevel, 5, \ 2481 "Maximum number of nested calls that are analyzed by BC EA.") \ 2482 \ 2483 product(intx, MaxBCEAEstimateSize, 150, \ 2484 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2485 \ 2486 product(intx, AllocatePrefetchStyle, 1, \ 2487 "0 = no prefetch, " \ 2488 "1 = prefetch instructions for each allocation, " \ 2489 "2 = use TLAB watermark to gate allocation prefetch") \ 2490 \ 2491 product(intx, AllocatePrefetchDistance, -1, \ 2492 "Distance to prefetch ahead of allocation pointer") \ 2493 \ 2494 product(intx, AllocatePrefetchLines, 1, \ 2495 "Number of lines to prefetch ahead of allocation pointer") \ 2496 \ 2497 product(intx, AllocatePrefetchStepSize, 16, \ 2498 "Step size in bytes of sequential prefetch instructions") \ 2499 \ 2500 product(intx, AllocatePrefetchInstr, 0, \ 2501 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2502 \ 2503 product(intx, ReadPrefetchInstr, 0, \ 2504 "Prefetch instruction to prefetch ahead") \ 2505 \ 2506 /* deoptimization */ \ 2507 develop(bool, TraceDeoptimization, false, \ 2508 "Trace deoptimization") \ 2509 \ 2510 develop(bool, DebugDeoptimization, false, \ 2511 "Tracing various information while debugging deoptimization") \ 2512 \ 2513 product(intx, SelfDestructTimer, 0, \ 2514 "Will cause VM to terminate after a given time (in minutes) " \ 2515 "(0 means off)") \ 2516 \ 2517 product(intx, MaxJavaStackTraceDepth, 1024, \ 2518 "Max. no. of lines in the stack trace for Java exceptions " \ 2519 "(0 means all)") \ 2520 \ 2521 develop(intx, GuaranteedSafepointInterval, 1000, \ 2522 "Guarantee a safepoint (at least) every so many milliseconds " \ 2523 "(0 means none)") \ 2524 \ 2525 product(intx, SafepointTimeoutDelay, 10000, \ 2526 "Delay in milliseconds for option SafepointTimeout") \ 2527 \ 2528 product(intx, NmethodSweepFraction, 4, \ 2529 "Number of invocations of sweeper to cover all nmethods") \ 2530 \ 2531 notproduct(intx, MemProfilingInterval, 500, \ 2532 "Time between each invocation of the MemProfiler") \ 2533 \ 2534 develop(intx, MallocCatchPtr, -1, \ 2535 "Hit breakpoint when mallocing/freeing this pointer") \ 2536 \ 2537 notproduct(intx, AssertRepeat, 1, \ 2538 "number of times to evaluate expression in assert " \ 2539 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2540 \ 2541 notproduct(ccstrlist, SuppressErrorAt, "", \ 2542 "List of assertions (file:line) to muzzle") \ 2543 \ 2544 notproduct(uintx, HandleAllocationLimit, 1024, \ 2545 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2546 "is used") \ 2547 \ 2548 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2549 "Threshold for total handle allocation when " \ 2550 "+TraceHandleAllocation is used") \ 2551 \ 2552 develop(intx, StackPrintLimit, 100, \ 2553 "number of stack frames to print in VM-level stack dump") \ 2554 \ 2555 notproduct(intx, MaxElementPrintSize, 256, \ 2556 "maximum number of elements to print") \ 2557 \ 2558 notproduct(intx, MaxSubklassPrintSize, 4, \ 2559 "maximum number of subklasses to print when printing klass") \ 2560 \ 2561 develop(intx, MaxInlineLevel, 9, \ 2562 "maximum number of nested calls that are inlined") \ 2563 \ 2564 develop(intx, MaxRecursiveInlineLevel, 1, \ 2565 "maximum number of nested recursive calls that are inlined") \ 2566 \ 2567 product(intx, InlineSmallCode, 1000, \ 2568 "Only inline already compiled methods if their code size is " \ 2569 "less than this") \ 2570 \ 2571 product(intx, MaxInlineSize, 35, \ 2572 "maximum bytecode size of a method to be inlined") \ 2573 \ 2574 product_pd(intx, FreqInlineSize, \ 2575 "maximum bytecode size of a frequent method to be inlined") \ 2576 \ 2577 develop(intx, MaxTrivialSize, 6, \ 2578 "maximum bytecode size of a trivial method to be inlined") \ 2579 \ 2580 develop(intx, MinInliningThreshold, 250, \ 2581 "min. invocation count a method needs to have to be inlined") \ 2582 \ 2583 develop(intx, AlignEntryCode, 4, \ 2584 "aligns entry code to specified value (in bytes)") \ 2585 \ 2586 develop(intx, MethodHistogramCutoff, 100, \ 2587 "cutoff value for method invoc. histogram (+CountCalls)") \ 2588 \ 2589 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2590 "# of interpreted methods to show in profile") \ 2591 \ 2592 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2593 "# of compiled methods to show in profile") \ 2594 \ 2595 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2596 "# of stub methods to show in profile") \ 2597 \ 2598 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2599 "# of runtime stub nodes to show in profile") \ 2600 \ 2601 product(intx, ProfileIntervalsTicks, 100, \ 2602 "# of ticks between printing of interval profile " \ 2603 "(+ProfileIntervals)") \ 2604 \ 2605 notproduct(intx, ScavengeALotInterval, 1, \ 2606 "Interval between which scavenge will occur with +ScavengeALot") \ 2607 \ 2608 notproduct(intx, FullGCALotInterval, 1, \ 2609 "Interval between which full gc will occur with +FullGCALot") \ 2610 \ 2611 notproduct(intx, FullGCALotStart, 0, \ 2612 "For which invocation to start FullGCAlot") \ 2613 \ 2614 notproduct(intx, FullGCALotDummies, 32*K, \ 2615 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2616 "to move") \ 2617 \ 2618 develop(intx, DontYieldALotInterval, 10, \ 2619 "Interval between which yields will be dropped (milliseconds)") \ 2620 \ 2621 develop(intx, MinSleepInterval, 1, \ 2622 "Minimum sleep() interval (milliseconds) when " \ 2623 "ConvertSleepToYield is off (used for SOLARIS)") \ 2624 \ 2625 product(intx, EventLogLength, 2000, \ 2626 "maximum nof events in event log") \ 2627 \ 2628 develop(intx, ProfilerPCTickThreshold, 15, \ 2629 "Number of ticks in a PC buckets to be a hotspot") \ 2630 \ 2631 notproduct(intx, DeoptimizeALotInterval, 5, \ 2632 "Number of exits until DeoptimizeALot kicks in") \ 2633 \ 2634 notproduct(intx, ZombieALotInterval, 5, \ 2635 "Number of exits until ZombieALot kicks in") \ 2636 \ 2637 develop(bool, StressNonEntrant, false, \ 2638 "Mark nmethods non-entrant at registration") \ 2639 \ 2640 diagnostic(intx, MallocVerifyInterval, 0, \ 2641 "if non-zero, verify C heap after every N calls to " \ 2642 "malloc/realloc/free") \ 2643 \ 2644 diagnostic(intx, MallocVerifyStart, 0, \ 2645 "if non-zero, start verifying C heap after Nth call to " \ 2646 "malloc/realloc/free") \ 2647 \ 2648 product(intx, TypeProfileWidth, 2, \ 2649 "number of receiver types to record in call/cast profile") \ 2650 \ 2651 develop(intx, BciProfileWidth, 2, \ 2652 "number of return bci's to record in ret profile") \ 2653 \ 2654 product(intx, PerMethodRecompilationCutoff, 400, \ 2655 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2656 \ 2657 product(intx, PerBytecodeRecompilationCutoff, 100, \ 2658 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2659 \ 2660 product(intx, PerMethodTrapLimit, 100, \ 2661 "Limit on traps (of one kind) in a method (includes inlines)") \ 2662 \ 2663 product(intx, PerBytecodeTrapLimit, 4, \ 2664 "Limit on traps (of one kind) at a particular BCI") \ 2665 \ 2666 develop(intx, FreqCountInvocations, 1, \ 2667 "Scaling factor for branch frequencies (deprecated)") \ 2668 \ 2669 develop(intx, InlineFrequencyRatio, 20, \ 2670 "Ratio of call site execution to caller method invocation") \ 2671 \ 2672 develop_pd(intx, InlineFrequencyCount, \ 2673 "Count of call site execution necessary to trigger frequent " \ 2674 "inlining") \ 2675 \ 2676 develop(intx, InlineThrowCount, 50, \ 2677 "Force inlining of interpreted methods that throw this often") \ 2678 \ 2679 develop(intx, InlineThrowMaxSize, 200, \ 2680 "Force inlining of throwing methods smaller than this") \ 2681 \ 2682 product(intx, AliasLevel, 3, \ 2683 "0 for no aliasing, 1 for oop/field/static/array split, " \ 2684 "2 for class split, 3 for unique instances") \ 2685 \ 2686 develop(bool, VerifyAliases, false, \ 2687 "perform extra checks on the results of alias analysis") \ 2688 \ 2689 develop(intx, ProfilerNodeSize, 1024, \ 2690 "Size in K to allocate for the Profile Nodes of each thread") \ 2691 \ 2692 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 2693 "Number of times to spin wait on a v8 atomic operation lock") \ 2694 \ 2695 product(intx, ReadSpinIterations, 100, \ 2696 "Number of read attempts before a yield (spin inner loop)") \ 2697 \ 2698 product_pd(intx, PreInflateSpin, \ 2699 "Number of times to spin wait before inflation") \ 2700 \ 2701 product(intx, PreBlockSpin, 10, \ 2702 "Number of times to spin in an inflated lock before going to " \ 2703 "an OS lock") \ 2704 \ 2705 /* gc parameters */ \ 2706 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \ 2707 "Default maximum size for object heap (in bytes)") \ 2708 \ 2709 product_pd(uintx, NewSize, \ 2710 "Default size of new generation (in bytes)") \ 2711 \ 2712 product(uintx, MaxNewSize, max_uintx, \ 2713 "Maximum size of new generation (in bytes)") \ 2714 \ 2715 product(uintx, PretenureSizeThreshold, 0, \ 2716 "Max size in bytes of objects allocated in DefNew generation") \ 2717 \ 2718 product_pd(uintx, TLABSize, \ 2719 "Default (or starting) size of TLAB (in bytes)") \ 2720 \ 2721 product(uintx, MinTLABSize, 2*K, \ 2722 "Minimum allowed TLAB size (in bytes)") \ 2723 \ 2724 product(uintx, TLABAllocationWeight, 35, \ 2725 "Allocation averaging weight") \ 2726 \ 2727 product(uintx, TLABWasteTargetPercent, 1, \ 2728 "Percentage of Eden that can be wasted") \ 2729 \ 2730 product(uintx, TLABRefillWasteFraction, 64, \ 2731 "Max TLAB waste at a refill (internal fragmentation)") \ 2732 \ 2733 product(uintx, TLABWasteIncrement, 4, \ 2734 "Increment allowed waste at slow allocation") \ 2735 \ 2736 product_pd(intx, SurvivorRatio, \ 2737 "Ratio of eden/survivor space size") \ 2738 \ 2739 product_pd(intx, NewRatio, \ 2740 "Ratio of new/old generation sizes") \ 2741 \ 2742 product(uintx, MaxLiveObjectEvacuationRatio, 100, \ 2743 "Max percent of eden objects that will be live at scavenge") \ 2744 \ 2745 product_pd(uintx, NewSizeThreadIncrease, \ 2746 "Additional size added to desired new generation size per " \ 2747 "non-daemon thread (in bytes)") \ 2748 \ 2749 product(uintx, OldSize, ScaleForWordSize(4096*K), \ 2750 "Default size of tenured generation (in bytes)") \ 2751 \ 2752 product_pd(uintx, PermSize, \ 2753 "Default size of permanent generation (in bytes)") \ 2754 \ 2755 product_pd(uintx, MaxPermSize, \ 2756 "Maximum size of permanent generation (in bytes)") \ 2757 \ 2758 product(uintx, MinHeapFreeRatio, 40, \ 2759 "Min percentage of heap free after GC to avoid expansion") \ 2760 \ 2761 product(uintx, MaxHeapFreeRatio, 70, \ 2762 "Max percentage of heap free after GC to avoid shrinking") \ 2763 \ 2764 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 2765 "Number of milliseconds per MB of free space in the heap") \ 2766 \ 2767 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 2768 "Min change in heap space due to GC (in bytes)") \ 2769 \ 2770 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 2771 "Min expansion of permanent heap (in bytes)") \ 2772 \ 2773 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 2774 "Max expansion of permanent heap without full GC (in bytes)") \ 2775 \ 2776 product(intx, QueuedAllocationWarningCount, 0, \ 2777 "Number of times an allocation that queues behind a GC " \ 2778 "will retry before printing a warning") \ 2779 \ 2780 diagnostic(uintx, VerifyGCStartAt, 0, \ 2781 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 2782 \ 2783 diagnostic(intx, VerifyGCLevel, 0, \ 2784 "Generation level at which to start +VerifyBefore/AfterGC") \ 2785 \ 2786 develop(uintx, ExitAfterGCNum, 0, \ 2787 "If non-zero, exit after this GC.") \ 2788 \ 2789 product(intx, MaxTenuringThreshold, 15, \ 2790 "Maximum value for tenuring threshold") \ 2791 \ 2792 product(intx, InitialTenuringThreshold, 7, \ 2793 "Initial value for tenuring threshold") \ 2794 \ 2795 product(intx, TargetSurvivorRatio, 50, \ 2796 "Desired percentage of survivor space used after scavenge") \ 2797 \ 2798 product(uintx, MarkSweepDeadRatio, 5, \ 2799 "Percentage (0-100) of the old gen allowed as dead wood." \ 2800 "Serial mark sweep treats this as both the min and max value." \ 2801 "CMS uses this value only if it falls back to mark sweep." \ 2802 "Par compact uses a variable scale based on the density of the" \ 2803 "generation and treats this as the max value when the heap is" \ 2804 "either completely full or completely empty. Par compact also" \ 2805 "has a smaller default value; see arguments.cpp.") \ 2806 \ 2807 product(uintx, PermMarkSweepDeadRatio, 20, \ 2808 "Percentage (0-100) of the perm gen allowed as dead wood." \ 2809 "See MarkSweepDeadRatio for collector-specific comments.") \ 2810 \ 2811 product(intx, MarkSweepAlwaysCompactCount, 4, \ 2812 "How often should we fully compact the heap (ignoring the dead " \ 2813 "space parameters)") \ 2814 \ 2815 product(intx, PrintCMSStatistics, 0, \ 2816 "Statistics for CMS") \ 2817 \ 2818 product(bool, PrintCMSInitiationStatistics, false, \ 2819 "Statistics for initiating a CMS collection") \ 2820 \ 2821 product(intx, PrintFLSStatistics, 0, \ 2822 "Statistics for CMS' FreeListSpace") \ 2823 \ 2824 product(intx, PrintFLSCensus, 0, \ 2825 "Census for CMS' FreeListSpace") \ 2826 \ 2827 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 2828 "Delay in ms between expansion and allocation") \ 2829 \ 2830 product(intx, DeferThrSuspendLoopCount, 4000, \ 2831 "(Unstable) Number of times to iterate in safepoint loop " \ 2832 " before blocking VM threads ") \ 2833 \ 2834 product(intx, DeferPollingPageLoopCount, -1, \ 2835 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 2836 "before changing safepoint polling page to RO ") \ 2837 \ 2838 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 2839 \ 2840 product(bool, UseDepthFirstScavengeOrder, true, \ 2841 "true: the scavenge order will be depth-first, " \ 2842 "false: the scavenge order will be breadth-first") \ 2843 \ 2844 product(bool, PSChunkLargeArrays, true, \ 2845 "true: process large arrays in chunks") \ 2846 \ 2847 product(uintx, GCDrainStackTargetSize, 64, \ 2848 "how many entries we'll try to leave on the stack during " \ 2849 "parallel GC") \ 2850 \ 2851 product(intx, DCQBarrierQueueBufferSize, 256, \ 2852 "Number of elements in a dirty card queue buffer") \ 2853 \ 2854 product(intx, DCQBarrierProcessCompletedThreshold, 5, \ 2855 "Number of completed dirty card buffers to trigger processing.") \ 2856 \ 2857 /* stack parameters */ \ 2858 product_pd(intx, StackYellowPages, \ 2859 "Number of yellow zone (recoverable overflows) pages") \ 2860 \ 2861 product_pd(intx, StackRedPages, \ 2862 "Number of red zone (unrecoverable overflows) pages") \ 2863 \ 2864 product_pd(intx, StackShadowPages, \ 2865 "Number of shadow zone (for overflow checking) pages" \ 2866 " this should exceed the depth of the VM and native call stack") \ 2867 \ 2868 product_pd(intx, ThreadStackSize, \ 2869 "Thread Stack Size (in Kbytes)") \ 2870 \ 2871 product_pd(intx, VMThreadStackSize, \ 2872 "Non-Java Thread Stack Size (in Kbytes)") \ 2873 \ 2874 product_pd(intx, CompilerThreadStackSize, \ 2875 "Compiler Thread Stack Size (in Kbytes)") \ 2876 \ 2877 develop_pd(uintx, JVMInvokeMethodSlack, \ 2878 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 2879 \ 2880 product(uintx, ThreadSafetyMargin, 50*M, \ 2881 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 2882 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 2883 "disable this feature") \ 2884 \ 2885 /* code cache parameters */ \ 2886 develop(uintx, CodeCacheSegmentSize, 64, \ 2887 "Code cache segment size (in bytes) - smallest unit of " \ 2888 "allocation") \ 2889 \ 2890 develop_pd(intx, CodeEntryAlignment, \ 2891 "Code entry alignment for generated code (in bytes)") \ 2892 \ 2893 product_pd(uintx, InitialCodeCacheSize, \ 2894 "Initial code cache size (in bytes)") \ 2895 \ 2896 product_pd(uintx, ReservedCodeCacheSize, \ 2897 "Reserved code cache size (in bytes) - maximum code cache size") \ 2898 \ 2899 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 2900 "When less than X space left, we stop compiling.") \ 2901 \ 2902 product_pd(uintx, CodeCacheExpansionSize, \ 2903 "Code cache expansion size (in bytes)") \ 2904 \ 2905 develop_pd(uintx, CodeCacheMinBlockLength, \ 2906 "Minimum number of segments in a code cache block.") \ 2907 \ 2908 notproduct(bool, ExitOnFullCodeCache, false, \ 2909 "Exit the VM if we fill the code cache.") \ 2910 \ 2911 /* interpreter debugging */ \ 2912 develop(intx, BinarySwitchThreshold, 5, \ 2913 "Minimal number of lookupswitch entries for rewriting to binary " \ 2914 "switch") \ 2915 \ 2916 develop(intx, StopInterpreterAt, 0, \ 2917 "Stops interpreter execution at specified bytecode number") \ 2918 \ 2919 develop(intx, TraceBytecodesAt, 0, \ 2920 "Traces bytecodes starting with specified bytecode number") \ 2921 \ 2922 /* compiler interface */ \ 2923 develop(intx, CIStart, 0, \ 2924 "the id of the first compilation to permit") \ 2925 \ 2926 develop(intx, CIStop, -1, \ 2927 "the id of the last compilation to permit") \ 2928 \ 2929 develop(intx, CIStartOSR, 0, \ 2930 "the id of the first osr compilation to permit " \ 2931 "(CICountOSR must be on)") \ 2932 \ 2933 develop(intx, CIStopOSR, -1, \ 2934 "the id of the last osr compilation to permit " \ 2935 "(CICountOSR must be on)") \ 2936 \ 2937 develop(intx, CIBreakAtOSR, -1, \ 2938 "id of osr compilation to break at") \ 2939 \ 2940 develop(intx, CIBreakAt, -1, \ 2941 "id of compilation to break at") \ 2942 \ 2943 product(ccstrlist, CompileOnly, "", \ 2944 "List of methods (pkg/class.name) to restrict compilation to") \ 2945 \ 2946 product(ccstr, CompileCommandFile, NULL, \ 2947 "Read compiler commands from this file [.hotspot_compiler]") \ 2948 \ 2949 product(ccstrlist, CompileCommand, "", \ 2950 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 2951 \ 2952 product(bool, CICompilerCountPerCPU, false, \ 2953 "1 compiler thread for log(N CPUs)") \ 2954 \ 2955 develop(intx, CIFireOOMAt, -1, \ 2956 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2957 "(non-negative value throws OOM after this many CI accesses " \ 2958 "in each compile)") \ 2959 \ 2960 develop(intx, CIFireOOMAtDelay, -1, \ 2961 "Wait for this many CI accesses to occur in all compiles before " \ 2962 "beginning to throw OutOfMemoryErrors in each compile") \ 2963 \ 2964 /* Priorities */ \ 2965 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2966 \ 2967 product(intx, ThreadPriorityPolicy, 0, \ 2968 "0 : Normal. "\ 2969 " VM chooses priorities that are appropriate for normal "\ 2970 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2971 " to normal native priority. Java priorities below NORM_PRIORITY"\ 2972 " map to lower native priority values. On Windows applications"\ 2973 " are allowed to use higher native priorities. However, with "\ 2974 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 2975 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 2976 " interfere with system threads. On Linux thread priorities "\ 2977 " are ignored because the OS does not support static priority "\ 2978 " in SCHED_OTHER scheduling class which is the only choice for"\ 2979 " non-root, non-realtime applications. "\ 2980 "1 : Aggressive. "\ 2981 " Java thread priorities map over to the entire range of "\ 2982 " native thread priorities. Higher Java thread priorities map "\ 2983 " to higher native thread priorities. This policy should be "\ 2984 " used with care, as sometimes it can cause performance "\ 2985 " degradation in the application and/or the entire system. On "\ 2986 " Linux this policy requires root privilege.") \ 2987 \ 2988 product(bool, ThreadPriorityVerbose, false, \ 2989 "print priority changes") \ 2990 \ 2991 product(intx, DefaultThreadPriority, -1, \ 2992 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ 2993 \ 2994 product(intx, CompilerThreadPriority, -1, \ 2995 "what priority should compiler threads run at (-1 means no change)") \ 2996 \ 2997 product(intx, VMThreadPriority, -1, \ 2998 "what priority should VM threads run at (-1 means no change)") \ 2999 \ 3000 product(bool, CompilerThreadHintNoPreempt, true, \ 3001 "(Solaris only) Give compiler threads an extra quanta") \ 3002 \ 3003 product(bool, VMThreadHintNoPreempt, false, \ 3004 "(Solaris only) Give VM thread an extra quanta") \ 3005 \ 3006 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3007 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3008 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3009 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3010 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3011 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3012 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3013 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3014 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3015 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3016 \ 3017 /* compiler debugging */ \ 3018 notproduct(intx, CompileTheWorldStartAt, 1, \ 3019 "First class to consider when using +CompileTheWorld") \ 3020 \ 3021 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3022 "Last class to consider when using +CompileTheWorld") \ 3023 \ 3024 develop(intx, NewCodeParameter, 0, \ 3025 "Testing Only: Create a dedicated integer parameter before " \ 3026 "putback") \ 3027 \ 3028 /* new oopmap storage allocation */ \ 3029 develop(intx, MinOopMapAllocation, 8, \ 3030 "Minimum number of OopMap entries in an OopMapSet") \ 3031 \ 3032 /* Background Compilation */ \ 3033 develop(intx, LongCompileThreshold, 50, \ 3034 "Used with +TraceLongCompiles") \ 3035 \ 3036 product(intx, StarvationMonitorInterval, 200, \ 3037 "Pause between each check in ms") \ 3038 \ 3039 /* recompilation */ \ 3040 product_pd(intx, CompileThreshold, \ 3041 "number of interpreted method invocations before (re-)compiling") \ 3042 \ 3043 product_pd(intx, BackEdgeThreshold, \ 3044 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3045 \ 3046 product(intx, Tier1BytecodeLimit, 10, \ 3047 "Must have at least this many bytecodes before tier1" \ 3048 "invocation counters are used") \ 3049 \ 3050 product_pd(intx, Tier2CompileThreshold, \ 3051 "threshold at which a tier 2 compilation is invoked") \ 3052 \ 3053 product_pd(intx, Tier2BackEdgeThreshold, \ 3054 "Back edge threshold at which a tier 2 compilation is invoked") \ 3055 \ 3056 product_pd(intx, Tier3CompileThreshold, \ 3057 "threshold at which a tier 3 compilation is invoked") \ 3058 \ 3059 product_pd(intx, Tier3BackEdgeThreshold, \ 3060 "Back edge threshold at which a tier 3 compilation is invoked") \ 3061 \ 3062 product_pd(intx, Tier4CompileThreshold, \ 3063 "threshold at which a tier 4 compilation is invoked") \ 3064 \ 3065 product_pd(intx, Tier4BackEdgeThreshold, \ 3066 "Back edge threshold at which a tier 4 compilation is invoked") \ 3067 \ 3068 product_pd(bool, TieredCompilation, \ 3069 "Enable two-tier compilation") \ 3070 \ 3071 product(bool, StressTieredRuntime, false, \ 3072 "Alternate client and server compiler on compile requests") \ 3073 \ 3074 product_pd(intx, OnStackReplacePercentage, \ 3075 "NON_TIERED number of method invocations/branches (expressed as %"\ 3076 "of CompileThreshold) before (re-)compiling OSR code") \ 3077 \ 3078 product(intx, InterpreterProfilePercentage, 33, \ 3079 "NON_TIERED number of method invocations/branches (expressed as %"\ 3080 "of CompileThreshold) before profiling in the interpreter") \ 3081 \ 3082 develop(intx, MaxRecompilationSearchLength, 10, \ 3083 "max. # frames to inspect searching for recompilee") \ 3084 \ 3085 develop(intx, MaxInterpretedSearchLength, 3, \ 3086 "max. # interp. frames to skip when searching for recompilee") \ 3087 \ 3088 develop(intx, DesiredMethodLimit, 8000, \ 3089 "desired max. method size (in bytecodes) after inlining") \ 3090 \ 3091 develop(intx, HugeMethodLimit, 8000, \ 3092 "don't compile methods larger than this if " \ 3093 "+DontCompileHugeMethods") \ 3094 \ 3095 /* New JDK 1.4 reflection implementation */ \ 3096 \ 3097 develop(bool, UseNewReflection, true, \ 3098 "Temporary flag for transition to reflection based on dynamic " \ 3099 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3100 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3101 "changes were needed") \ 3102 \ 3103 develop(bool, VerifyReflectionBytecodes, false, \ 3104 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3105 "in situations like that described in 4486457 or for " \ 3106 "constructors generated for serialization, so can not be enabled "\ 3107 "in product.") \ 3108 \ 3109 product(bool, ReflectionWrapResolutionErrors, true, \ 3110 "Temporary flag for transition to AbstractMethodError wrapped " \ 3111 "in InvocationTargetException. See 6531596") \ 3112 \ 3113 \ 3114 develop(intx, FastSuperclassLimit, 8, \ 3115 "Depth of hardwired instanceof accelerator array") \ 3116 \ 3117 /* Properties for Java libraries */ \ 3118 \ 3119 product(intx, MaxDirectMemorySize, -1, \ 3120 "Maximum total size of NIO direct-buffer allocations") \ 3121 \ 3122 /* temporary developer defined flags */ \ 3123 \ 3124 diagnostic(bool, UseNewCode, false, \ 3125 "Testing Only: Use the new version while testing") \ 3126 \ 3127 diagnostic(bool, UseNewCode2, false, \ 3128 "Testing Only: Use the new version while testing") \ 3129 \ 3130 diagnostic(bool, UseNewCode3, false, \ 3131 "Testing Only: Use the new version while testing") \ 3132 \ 3133 /* flags for performance data collection */ \ 3134 \ 3135 product(bool, UsePerfData, true, \ 3136 "Flag to disable jvmstat instrumentation for performance testing" \ 3137 "and problem isolation purposes.") \ 3138 \ 3139 product(bool, PerfDataSaveToFile, false, \ 3140 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3141 \ 3142 product(ccstr, PerfDataSaveFile, NULL, \ 3143 "Save PerfData memory to the specified absolute pathname," \ 3144 "%p in the file name if present will be replaced by pid") \ 3145 \ 3146 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3147 "Data sampling interval in milliseconds") \ 3148 \ 3149 develop(bool, PerfTraceDataCreation, false, \ 3150 "Trace creation of Performance Data Entries") \ 3151 \ 3152 develop(bool, PerfTraceMemOps, false, \ 3153 "Trace PerfMemory create/attach/detach calls") \ 3154 \ 3155 product(bool, PerfDisableSharedMem, false, \ 3156 "Store performance data in standard memory") \ 3157 \ 3158 product(intx, PerfDataMemorySize, 32*K, \ 3159 "Size of performance data memory region. Will be rounded " \ 3160 "up to a multiple of the native os page size.") \ 3161 \ 3162 product(intx, PerfMaxStringConstLength, 1024, \ 3163 "Maximum PerfStringConstant string length before truncation") \ 3164 \ 3165 product(bool, PerfAllowAtExitRegistration, false, \ 3166 "Allow registration of atexit() methods") \ 3167 \ 3168 product(bool, PerfBypassFileSystemCheck, false, \ 3169 "Bypass Win32 file system criteria checks (Windows Only)") \ 3170 \ 3171 product(intx, UnguardOnExecutionViolation, 0, \ 3172 "Unguard page and retry on no-execute fault (Win32 only)" \ 3173 "0=off, 1=conservative, 2=aggressive") \ 3174 \ 3175 /* Serviceability Support */ \ 3176 \ 3177 product(bool, ManagementServer, false, \ 3178 "Create JMX Management Server") \ 3179 \ 3180 product(bool, DisableAttachMechanism, false, \ 3181 "Disable mechanism that allows tools to attach to this VM") \ 3182 \ 3183 product(bool, StartAttachListener, false, \ 3184 "Always start Attach Listener at VM startup") \ 3185 \ 3186 manageable(bool, PrintConcurrentLocks, false, \ 3187 "Print java.util.concurrent locks in thread dump") \ 3188 \ 3189 /* Shared spaces */ \ 3190 \ 3191 product(bool, UseSharedSpaces, true, \ 3192 "Use shared spaces in the permanent generation") \ 3193 \ 3194 product(bool, RequireSharedSpaces, false, \ 3195 "Require shared spaces in the permanent generation") \ 3196 \ 3197 product(bool, ForceSharedSpaces, false, \ 3198 "Require shared spaces in the permanent generation") \ 3199 \ 3200 product(bool, DumpSharedSpaces, false, \ 3201 "Special mode: JVM reads a class list, loads classes, builds " \ 3202 "shared spaces, and dumps the shared spaces to a file to be " \ 3203 "used in future JVM runs.") \ 3204 \ 3205 product(bool, PrintSharedSpaces, false, \ 3206 "Print usage of shared spaces") \ 3207 \ 3208 product(uintx, SharedDummyBlockSize, 512*M, \ 3209 "Size of dummy block used to shift heap addresses (in bytes)") \ 3210 \ 3211 product(uintx, SharedReadWriteSize, 12*M, \ 3212 "Size of read-write space in permanent generation (in bytes)") \ 3213 \ 3214 product(uintx, SharedReadOnlySize, 8*M, \ 3215 "Size of read-only space in permanent generation (in bytes)") \ 3216 \ 3217 product(uintx, SharedMiscDataSize, 4*M, \ 3218 "Size of the shared data area adjacent to the heap (in bytes)") \ 3219 \ 3220 product(uintx, SharedMiscCodeSize, 4*M, \ 3221 "Size of the shared code area adjacent to the heap (in bytes)") \ 3222 \ 3223 diagnostic(bool, SharedOptimizeColdStart, true, \ 3224 "At dump time, order shared objects to achieve better " \ 3225 "cold startup time.") \ 3226 \ 3227 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3228 "Reordering policy for SharedOptimizeColdStart " \ 3229 "0=favor classload-time locality, 1=balanced, " \ 3230 "2=favor runtime locality") \ 3231 \ 3232 diagnostic(bool, SharedSkipVerify, false, \ 3233 "Skip assert() and verify() which page-in unwanted shared " \ 3234 "objects. ") \ 3235 \ 3236 product(bool, AnonymousClasses, false, \ 3237 "support sun.misc.Unsafe.defineAnonymousClass") \ 3238 \ 3239 product(bool, TaggedStackInterpreter, false, \ 3240 "Insert tags in interpreter execution stack for oopmap generaion")\ 3241 \ 3242 diagnostic(bool, PauseAtStartup, false, \ 3243 "Causes the VM to pause at startup time and wait for the pause " \ 3244 "file to be removed (default: ./vm.paused.<pid>)") \ 3245 \ 3246 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3247 "The file to create and for whose removal to await when pausing " \ 3248 "at startup. (default: ./vm.paused.<pid>)") \ 3249 \ 3250 product(bool, ExtendedDTraceProbes, false, \ 3251 "Enable performance-impacting dtrace probes") \ 3252 \ 3253 product(bool, DTraceMethodProbes, false, \ 3254 "Enable dtrace probes for method-entry and method-exit") \ 3255 \ 3256 product(bool, DTraceAllocProbes, false, \ 3257 "Enable dtrace probes for object allocation") \ 3258 \ 3259 product(bool, DTraceMonitorProbes, false, \ 3260 "Enable dtrace probes for monitor events") \ 3261 \ 3262 product(bool, RelaxAccessControlCheck, false, \ 3263 "Relax the access control checks in the verifier") \ 3264 \ 3265 diagnostic(bool, PrintDTraceDOF, false, \ 3266 "Print the DTrace DOF passed to the system for JSDT probes") \ 3267 \ 3268 product(bool, UseVMInterruptibleIO, false, \ 3269 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3270 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3271 " of this flag is true for JDK 6 and earliers") 3272 3273 3274/* 3275 * Macros for factoring of globals 3276 */ 3277 3278// Interface macros 3279#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3280#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3281#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3282#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3283#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3284#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3285#ifdef PRODUCT 3286#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3287#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3288#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3289#else 3290#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3291#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3292#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3293#endif 3294// Special LP64 flags, product only needed for now. 3295#ifdef _LP64 3296#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3297#else 3298#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3299#endif // _LP64 3300 3301// Implementation macros 3302#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3303#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3304#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3305#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3306#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3307#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3308#ifdef PRODUCT 3309#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3310#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3311#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3312#else 3313#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3314#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3315#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3316#endif 3317#ifdef _LP64 3318#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3319#else 3320#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3321#endif // _LP64 3322 3323RUNTIME_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) 3324 3325RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3326