globals.hpp revision 695:becb17ad5e51
157429Smarkm/* 257429Smarkm * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. 357429Smarkm * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 457429Smarkm * 557429Smarkm * This code is free software; you can redistribute it and/or modify it 657429Smarkm * under the terms of the GNU General Public License version 2 only, as 760573Skris * published by the Free Software Foundation. 865668Skris * 965668Skris * This code is distributed in the hope that it will be useful, but WITHOUT 1065668Skris * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1165668Skris * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1265668Skris * version 2 for more details (a copy is included in the LICENSE file that 1365668Skris * accompanied this code). 1465668Skris * 1560573Skris * You should have received a copy of the GNU General Public License version 1665668Skris * 2 along with this work; if not, write to the Free Software Foundation, 1760573Skris * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1865668Skris * 1965668Skris * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 2065668Skris * CA 95054 USA or visit www.sun.com if you need additional information or 2165668Skris * have any questions. 2265668Skris * 2365668Skris */ 2465668Skris 2565668Skris#if !defined(COMPILER1) && !defined(COMPILER2) 2665668Skrisdefine_pd_global(bool, BackgroundCompilation, false); 2765668Skrisdefine_pd_global(bool, UseTLAB, false); 2865668Skrisdefine_pd_global(bool, CICompileOSR, false); 2965668Skrisdefine_pd_global(bool, UseTypeProfile, false); 3065668Skrisdefine_pd_global(bool, UseOnStackReplacement, false); 3165668Skrisdefine_pd_global(bool, InlineIntrinsics, false); 3265668Skrisdefine_pd_global(bool, PreferInterpreterNativeStubs, true); 3365668Skrisdefine_pd_global(bool, ProfileInterpreter, false); 3465668Skrisdefine_pd_global(bool, ProfileTraps, false); 3565668Skrisdefine_pd_global(bool, TieredCompilation, false); 3665668Skris 3757429Smarkmdefine_pd_global(intx, CompileThreshold, 0); 3857429Smarkmdefine_pd_global(intx, Tier2CompileThreshold, 0); 3957429Smarkmdefine_pd_global(intx, Tier3CompileThreshold, 0); 4069587Sgreendefine_pd_global(intx, Tier4CompileThreshold, 0); 4157429Smarkm 4257429Smarkmdefine_pd_global(intx, BackEdgeThreshold, 0); 4357429Smarkmdefine_pd_global(intx, Tier2BackEdgeThreshold, 0); 4457429Smarkmdefine_pd_global(intx, Tier3BackEdgeThreshold, 0); 4557429Smarkmdefine_pd_global(intx, Tier4BackEdgeThreshold, 0); 4657429Smarkm 4757429Smarkmdefine_pd_global(intx, OnStackReplacePercentage, 0); 4857429Smarkmdefine_pd_global(bool, ResizeTLAB, false); 4957429Smarkmdefine_pd_global(intx, FreqInlineSize, 0); 5057429Smarkmdefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 5157429Smarkmdefine_pd_global(intx, NewRatio, 4); 5260573Skrisdefine_pd_global(intx, InlineClassNatives, true); 5357429Smarkmdefine_pd_global(intx, InlineUnsafeOps, true); 5460573Skrisdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 5560573Skrisdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 5660573Skrisdefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 5760573Skrisdefine_pd_global(intx, CodeCacheMinBlockLength, 1); 5860573Skrisdefine_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); 5960573Skrisdefine_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); 6060573Skrisdefine_pd_global(bool, NeverActAsServerClassMachine, true); 6169587Sgreendefine_pd_global(uintx, DefaultMaxRAM, 1*G); 6260573Skris#define CI_COMPILER_COUNT 0 6360573Skris#else 6460573Skris 6560573Skris#ifdef COMPILER2 6660573Skris#define CI_COMPILER_COUNT 2 6760573Skris#else 6860573Skris#define CI_COMPILER_COUNT 1 6960573Skris#endif // COMPILER2 7060573Skris 7157429Smarkm#endif // no compilers 7257429Smarkm 7357429Smarkm 7457429Smarkm// string type aliases used only in this file 7557429Smarkmtypedef const char* ccstr; 7657429Smarkmtypedef const char* ccstrlist; // represents string arguments which accumulate 7757429Smarkm 7857429Smarkmenum FlagValueOrigin { 7957429Smarkm DEFAULT = 0, 8057429Smarkm COMMAND_LINE = 1, 8157429Smarkm ENVIRON_VAR = 2, 8257429Smarkm CONFIG_FILE = 3, 8357429Smarkm MANAGEMENT = 4, 8457429Smarkm ERGONOMIC = 5, 8557429Smarkm ATTACH_ON_DEMAND = 6, 8657429Smarkm INTERNAL = 99 8757429Smarkm}; 8857429Smarkm 8957429Smarkmstruct Flag { 9057429Smarkm const char *type; 9157429Smarkm const char *name; 9257429Smarkm void* addr; 9357429Smarkm const char *kind; 9457429Smarkm FlagValueOrigin origin; 9557429Smarkm 9657429Smarkm // points to all Flags static array 9757429Smarkm static Flag *flags; 9857429Smarkm 9957429Smarkm // number of flags 10057429Smarkm static size_t numFlags; 10157429Smarkm 10257429Smarkm static Flag* find_flag(char* name, size_t length); 10357429Smarkm 10457429Smarkm bool is_bool() const { return strcmp(type, "bool") == 0; } 10557429Smarkm bool get_bool() const { return *((bool*) addr); } 10657429Smarkm void set_bool(bool value) { *((bool*) addr) = value; } 10757429Smarkm 10857429Smarkm bool is_intx() const { return strcmp(type, "intx") == 0; } 10957429Smarkm intx get_intx() const { return *((intx*) addr); } 11057429Smarkm void set_intx(intx value) { *((intx*) addr) = value; } 11157429Smarkm 11257429Smarkm bool is_uintx() const { return strcmp(type, "uintx") == 0; } 11357429Smarkm uintx get_uintx() const { return *((uintx*) addr); } 11457429Smarkm void set_uintx(uintx value) { *((uintx*) addr) = value; } 11557429Smarkm 11657429Smarkm bool is_double() const { return strcmp(type, "double") == 0; } 11757429Smarkm double get_double() const { return *((double*) addr); } 11857429Smarkm void set_double(double value) { *((double*) addr) = value; } 11957429Smarkm 12057429Smarkm bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 12157429Smarkm bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 12260573Skris ccstr get_ccstr() const { return *((ccstr*) addr); } 12360573Skris void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 12460573Skris 12560573Skris bool is_unlocker() const; 12660573Skris bool is_unlocked() const; 12760573Skris bool is_writeable() const; 12860573Skris bool is_external() const; 12960573Skris 13060573Skris void print_on(outputStream* st); 13160573Skris void print_as_flag(outputStream* st); 13260573Skris}; 13360573Skris 13460573Skris// debug flags control various aspects of the VM and are global accessible 13560573Skris 13660573Skris// use FlagSetting to temporarily change some debug flag 13760573Skris// e.g. FlagSetting fs(DebugThisAndThat, true); 13860573Skris// restored to previous value upon leaving scope 13960573Skrisclass FlagSetting { 14060573Skris bool val; 14160573Skris bool* flag; 14260573Skris public: 14360573Skris FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 14460573Skris ~FlagSetting() { *flag = val; } 14560573Skris}; 14660573Skris 14760573Skris 14860573Skrisclass CounterSetting { 14960573Skris intx* counter; 15060573Skris public: 15160573Skris CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 15260573Skris ~CounterSetting() { (*counter)--; } 15360573Skris}; 15460573Skris 15560573Skris 15660573Skrisclass IntFlagSetting { 15757429Smarkm intx val; 15857429Smarkm intx* flag; 15957429Smarkm public: 16057429Smarkm IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 16157429Smarkm ~IntFlagSetting() { *flag = val; } 16257429Smarkm}; 16357429Smarkm 16469587Sgreen 16569587Sgreenclass DoubleFlagSetting { 16669587Sgreen double val; 16757429Smarkm double* flag; 16857429Smarkm public: 16957429Smarkm DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 17069587Sgreen ~DoubleFlagSetting() { *flag = val; } 17169587Sgreen}; 17257429Smarkm 17357429Smarkm 17457429Smarkmclass CommandLineFlags { 17557429Smarkm public: 17657429Smarkm static bool boolAt(char* name, size_t len, bool* value); 17757429Smarkm static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 17857429Smarkm static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 17957429Smarkm static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 18057429Smarkm 18157429Smarkm static bool intxAt(char* name, size_t len, intx* value); 18257429Smarkm static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 18357429Smarkm static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 18457429Smarkm static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 18557429Smarkm 18657429Smarkm static bool uintxAt(char* name, size_t len, uintx* value); 18757429Smarkm static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 18857429Smarkm static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 18957429Smarkm static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 19057429Smarkm 19157429Smarkm static bool doubleAt(char* name, size_t len, double* value); 19257429Smarkm static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 19357429Smarkm static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 19457429Smarkm static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 19557429Smarkm 19657429Smarkm static bool ccstrAt(char* name, size_t len, ccstr* value); 19757429Smarkm static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 19857429Smarkm static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 19957429Smarkm static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 20057429Smarkm 20157429Smarkm // Returns false if name is not a command line flag. 20257429Smarkm static bool wasSetOnCmdline(const char* name, bool* value); 20357429Smarkm static void printSetFlags(); 20457429Smarkm 20557429Smarkm static void printFlags() PRODUCT_RETURN; 20657429Smarkm 20757429Smarkm static void verify() PRODUCT_RETURN; 20857429Smarkm}; 20957429Smarkm 21057429Smarkm// use this for flags that are true by default in the debug version but 21157429Smarkm// false in the optimized version, and vice versa 21257429Smarkm#ifdef ASSERT 21357429Smarkm#define trueInDebug true 21457429Smarkm#define falseInDebug false 21557429Smarkm#else 21657429Smarkm#define trueInDebug false 21757429Smarkm#define falseInDebug true 21857429Smarkm#endif 21957429Smarkm 22057429Smarkm// use this for flags that are true per default in the product build 22157429Smarkm// but false in development builds, and vice versa 22257429Smarkm#ifdef PRODUCT 22357429Smarkm#define trueInProduct true 22457429Smarkm#define falseInProduct false 22557429Smarkm#else 22657429Smarkm#define trueInProduct false 22757429Smarkm#define falseInProduct true 22857429Smarkm#endif 22957429Smarkm 23057429Smarkm// use this for flags that are true per default in the tiered build 23157429Smarkm// but false in non-tiered builds, and vice versa 23257429Smarkm#ifdef TIERED 23357429Smarkm#define trueInTiered true 23457429Smarkm#define falseInTiered false 23557429Smarkm#else 23657429Smarkm#define trueInTiered false 23757429Smarkm#define falseInTiered true 23857429Smarkm#endif 23957429Smarkm 24057429Smarkm// develop flags are settable / visible only during development and are constant in the PRODUCT version 24157429Smarkm// product flags are always settable / visible 24257429Smarkm// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 24357429Smarkm 24457429Smarkm// A flag must be declared with one of the following types: 24557429Smarkm// bool, intx, uintx, ccstr. 24657429Smarkm// The type "ccstr" is an alias for "const char*" and is used 24757429Smarkm// only in this file, because the macrology requires single-token type names. 24857429Smarkm 24957429Smarkm// Note: Diagnostic options not meant for VM tuning or for product modes. 25057429Smarkm// They are to be used for VM quality assurance or field diagnosis 25157429Smarkm// of VM bugs. They are hidden so that users will not be encouraged to 25257429Smarkm// try them as if they were VM ordinary execution options. However, they 25357429Smarkm// are available in the product version of the VM. Under instruction 25457429Smarkm// from support engineers, VM customers can turn them on to collect 25557429Smarkm// diagnostic information about VM problems. To use a VM diagnostic 25657429Smarkm// option, you must first specify +UnlockDiagnosticVMOptions. 25757429Smarkm// (This master switch also affects the behavior of -Xprintflags.) 25857429Smarkm// 25957429Smarkm// experimental flags are in support of features that are not 26057429Smarkm// part of the officially supported product, but are available 26157429Smarkm// for experimenting with. They could, for example, be performance 26257429Smarkm// features that may not have undergone full or rigorous QA, but which may 26357429Smarkm// help performance in some cases and released for experimentation 26457429Smarkm// by the community of users and developers. This flag also allows one to 26557429Smarkm// be able to build a fully supported product that nonetheless also 26657429Smarkm// ships with some unsupported, lightly tested, experimental features. 26757429Smarkm// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 26857429Smarkm// UnlockExperimentalVMOptions flag, which allows the control and 26957429Smarkm// modification of the experimental flags. 27057429Smarkm// 27157429Smarkm// manageable flags are writeable external product flags. 27257429Smarkm// They are dynamically writeable through the JDK management interface 27357429Smarkm// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 27457429Smarkm// These flags are external exported interface (see CCC). The list of 27557429Smarkm// manageable flags can be queried programmatically through the management 27657429Smarkm// interface. 27757429Smarkm// 27857429Smarkm// A flag can be made as "manageable" only if 27957429Smarkm// - the flag is defined in a CCC as an external exported interface. 28057429Smarkm// - the VM implementation supports dynamic setting of the flag. 28157429Smarkm// This implies that the VM must *always* query the flag variable 28257429Smarkm// and not reuse state related to the flag state at any given time. 28357429Smarkm// - you want the flag to be queried programmatically by the customers. 28457429Smarkm// 28557429Smarkm// product_rw flags are writeable internal product flags. 28657429Smarkm// They are like "manageable" flags but for internal/private use. 28757429Smarkm// The list of product_rw flags are internal/private flags which 28857429Smarkm// may be changed/removed in a future release. It can be set 28957429Smarkm// through the management interface to get/set value 29057429Smarkm// when the name of flag is supplied. 29157429Smarkm// 29257429Smarkm// A flag can be made as "product_rw" only if 29357429Smarkm// - the VM implementation supports dynamic setting of the flag. 29457429Smarkm// This implies that the VM must *always* query the flag variable 29557429Smarkm// and not reuse state related to the flag state at any given time. 29657429Smarkm// 29757429Smarkm// Note that when there is a need to support develop flags to be writeable, 29857429Smarkm// it can be done in the same way as product_rw. 29957429Smarkm 30057429Smarkm#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 30157429Smarkm \ 30257429Smarkm lp64_product(bool, UseCompressedOops, false, \ 30360573Skris "Use 32-bit object references in 64-bit VM. " \ 30457429Smarkm "lp64_product means flag is always constant in 32 bit VM") \ 30557429Smarkm \ 30657429Smarkm notproduct(bool, CheckCompressedOops, true, \ 30757429Smarkm "generate checks in encoding/decoding code in debug VM") \ 30857429Smarkm \ 30957429Smarkm product_pd(uintx, HeapBaseMinAddress, \ 31057429Smarkm "OS specific low limit for heap base address") \ 31157429Smarkm \ 31257429Smarkm diagnostic(bool, PrintCompressedOopsMode, false, \ 31357429Smarkm "Print compressed oops base address and encoding mode") \ 31457429Smarkm \ 31557429Smarkm /* UseMembar is theoretically a temp flag used for memory barrier \ 31657429Smarkm * removal testing. It was supposed to be removed before FCS but has \ 31757429Smarkm * been re-added (see 6401008) */ \ 31857429Smarkm product(bool, UseMembar, false, \ 31957429Smarkm "(Unstable) Issues membars on thread state transitions") \ 32057429Smarkm \ 32160573Skris product(bool, PrintCommandLineFlags, false, \ 32257429Smarkm "Prints flags that appeared on the command line") \ 32357429Smarkm \ 32457429Smarkm diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 32557429Smarkm "Enable normal processing of flags relating to field diagnostics")\ 32657429Smarkm \ 32757429Smarkm experimental(bool, UnlockExperimentalVMOptions, false, \ 32857429Smarkm "Enable normal processing of flags relating to experimental features")\ 32957429Smarkm \ 33057429Smarkm product(bool, JavaMonitorsInStackTrace, true, \ 33157429Smarkm "Print info. about Java monitor locks when the stacks are dumped")\ 33269587Sgreen \ 33357429Smarkm product_pd(bool, UseLargePages, \ 33457429Smarkm "Use large page memory") \ 33557429Smarkm \ 33657429Smarkm product_pd(bool, UseLargePagesIndividualAllocation, \ 33757429Smarkm "Allocate large pages individually for better affinity") \ 33869587Sgreen \ 33969587Sgreen develop(bool, LargePagesIndividualAllocationInjectError, false, \ 34069587Sgreen "Fail large pages individual allocation") \ 34157429Smarkm \ 34257429Smarkm develop(bool, TracePageSizes, false, \ 34369587Sgreen "Trace page size selection and usage.") \ 34457429Smarkm \ 34557429Smarkm product(bool, UseNUMA, false, \ 34657429Smarkm "Use NUMA if available") \ 34757429Smarkm \ 34857429Smarkm product(bool, ForceNUMA, false, \ 34957429Smarkm "Force NUMA optimizations on single-node/UMA systems") \ 35057429Smarkm \ 35157429Smarkm product(intx, NUMAChunkResizeWeight, 20, \ 35257429Smarkm "Percentage (0-100) used to weight the current sample when " \ 35357429Smarkm "computing exponentially decaying average for " \ 35469587Sgreen "AdaptiveNUMAChunkSizing") \ 35557429Smarkm \ 35669587Sgreen product(intx, NUMASpaceResizeRate, 1*G, \ 35769587Sgreen "Do not reallocate more that this amount per collection") \ 35869587Sgreen \ 35960573Skris product(bool, UseAdaptiveNUMAChunkSizing, true, \ 36069587Sgreen "Enable adaptive chunk sizing for NUMA") \ 36169587Sgreen \ 36269587Sgreen product(bool, NUMAStats, false, \ 36357429Smarkm "Print NUMA stats in detailed heap information") \ 36457429Smarkm \ 36557429Smarkm product(intx, NUMAPageScanRate, 256, \ 36657429Smarkm "Maximum number of pages to include in the page scan procedure") \ 36757429Smarkm \ 36860573Skris product_pd(bool, NeedsDeoptSuspend, \ 36957429Smarkm "True for register window machines (sparc/ia64)") \ 37057429Smarkm \ 37157429Smarkm product(intx, UseSSE, 99, \ 37257429Smarkm "Highest supported SSE instructions set on x86/x64") \ 37357429Smarkm \ 37457429Smarkm product(uintx, LargePageSizeInBytes, 0, \ 37557429Smarkm "Large page size (0 to let VM choose the page size") \ 37657429Smarkm \ 37757429Smarkm product(uintx, LargePageHeapSizeThreshold, 128*M, \ 37860573Skris "Use large pages if max heap is at least this big") \ 37960573Skris \ 38060573Skris product(bool, ForceTimeHighResolution, false, \ 38160573Skris "Using high time resolution(For Win32 only)") \ 38260573Skris \ 38360573Skris develop(bool, TraceItables, false, \ 38460573Skris "Trace initialization and use of itables") \ 38560573Skris \ 38660573Skris develop(bool, TracePcPatching, false, \ 38760573Skris "Trace usage of frame::patch_pc") \ 38860573Skris \ 38960573Skris develop(bool, TraceJumps, false, \ 39060573Skris "Trace assembly jumps in thread ring buffer") \ 39160573Skris \ 39260573Skris develop(bool, TraceRelocator, false, \ 39360573Skris "Trace the bytecode relocator") \ 39460573Skris \ 39560573Skris develop(bool, TraceLongCompiles, false, \ 39660573Skris "Print out every time compilation is longer than " \ 39760573Skris "a given threashold") \ 39860573Skris \ 39960573Skris develop(bool, SafepointALot, false, \ 40060573Skris "Generates a lot of safepoints. Works with " \ 40157429Smarkm "GuaranteedSafepointInterval") \ 40257429Smarkm \ 40357429Smarkm product_pd(bool, BackgroundCompilation, \ 40457429Smarkm "A thread requesting compilation is not blocked during " \ 40557429Smarkm "compilation") \ 40657429Smarkm \ 40757429Smarkm product(bool, PrintVMQWaitTime, false, \ 40857429Smarkm "Prints out the waiting time in VM operation queue") \ 40957429Smarkm \ 41057429Smarkm develop(bool, BailoutToInterpreterForThrows, false, \ 41157429Smarkm "Compiled methods which throws/catches exceptions will be " \ 41257429Smarkm "deopt and intp.") \ 41357429Smarkm \ 41457429Smarkm develop(bool, NoYieldsInMicrolock, false, \ 41557429Smarkm "Disable yields in microlock") \ 41657429Smarkm \ 41757429Smarkm develop(bool, TraceOopMapGeneration, false, \ 41857429Smarkm "Shows oopmap generation") \ 41957429Smarkm \ 42057429Smarkm product(bool, MethodFlushing, true, \ 42157429Smarkm "Reclamation of zombie and not-entrant methods") \ 42257429Smarkm \ 42357429Smarkm develop(bool, VerifyStack, false, \ 42457429Smarkm "Verify stack of each thread when it is entering a runtime call") \ 42560573Skris \ 42660573Skris develop(bool, ForceUnreachable, false, \ 42760573Skris "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \ 42860573Skris \ 42960573Skris notproduct(bool, StressDerivedPointers, false, \ 43057429Smarkm "Force scavenge when a derived pointers is detected on stack " \ 43160573Skris "after rtm call") \ 43260573Skris \ 43360573Skris develop(bool, TraceDerivedPointers, false, \ 43460573Skris "Trace traversal of derived pointers on stack") \ 43560573Skris \ 43660573Skris notproduct(bool, TraceCodeBlobStacks, false, \ 43760573Skris "Trace stack-walk of codeblobs") \ 43857429Smarkm \ 43957429Smarkm product(bool, PrintJNIResolving, false, \ 44057429Smarkm "Used to implement -v:jni") \ 44157429Smarkm \ 44257429Smarkm notproduct(bool, PrintRewrites, false, \ 44357429Smarkm "Print methods that are being rewritten") \ 44457429Smarkm \ 44560573Skris product(bool, UseInlineCaches, true, \ 44660573Skris "Use Inline Caches for virtual calls ") \ 44760573Skris \ 44860573Skris develop(bool, InlineArrayCopy, true, \ 44960573Skris "inline arraycopy native that is known to be part of " \ 45057429Smarkm "base library DLL") \ 45157429Smarkm \ 45257429Smarkm develop(bool, InlineObjectHash, true, \ 45357429Smarkm "inline Object::hashCode() native that is known to be part " \ 45457429Smarkm "of base library DLL") \ 45557429Smarkm \ 45657429Smarkm develop(bool, InlineObjectCopy, true, \ 45760573Skris "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 45857429Smarkm \ 45957429Smarkm develop(bool, InlineNatives, true, \ 46057429Smarkm "inline natives that are known to be part of base library DLL") \ 46157429Smarkm \ 46257429Smarkm develop(bool, InlineMathNatives, true, \ 46357429Smarkm "inline SinD, CosD, etc.") \ 46457429Smarkm \ 46557429Smarkm develop(bool, InlineClassNatives, true, \ 46657429Smarkm "inline Class.isInstance, etc") \ 46757429Smarkm \ 46857429Smarkm develop(bool, InlineAtomicLong, true, \ 46957429Smarkm "inline sun.misc.AtomicLong") \ 47057429Smarkm \ 47157429Smarkm develop(bool, InlineThreadNatives, true, \ 47257429Smarkm "inline Thread.currentThread, etc") \ 47357429Smarkm \ 47457429Smarkm develop(bool, InlineReflectionGetCallerClass, true, \ 47557429Smarkm "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 47657429Smarkm "of base library DLL") \ 47757429Smarkm \ 47857429Smarkm develop(bool, InlineUnsafeOps, true, \ 47957429Smarkm "inline memory ops (native methods) from sun.misc.Unsafe") \ 48057429Smarkm \ 48157429Smarkm develop(bool, ConvertCmpD2CmpF, true, \ 48260573Skris "Convert cmpD to cmpF when one input is constant in float range") \ 48357429Smarkm \ 48457429Smarkm develop(bool, ConvertFloat2IntClipping, true, \ 48557429Smarkm "Convert float2int clipping idiom to integer clipping") \ 48657429Smarkm \ 48757429Smarkm develop(bool, SpecialStringCompareTo, true, \ 48857429Smarkm "special version of string compareTo") \ 48957429Smarkm \ 49057429Smarkm develop(bool, SpecialStringIndexOf, true, \ 49157429Smarkm "special version of string indexOf") \ 49257429Smarkm \ 49357429Smarkm product(bool, SpecialArraysEquals, false, \ 49457429Smarkm "special version of Arrays.equals(char[],char[])") \ 49557429Smarkm \ 49665668Skris develop(bool, TraceCallFixup, false, \ 49765668Skris "traces all call fixups") \ 49857429Smarkm \ 49957429Smarkm develop(bool, DeoptimizeALot, false, \ 50057429Smarkm "deoptimize at every exit from the runtime system") \ 50157429Smarkm \ 50257429Smarkm notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 50357429Smarkm "a comma separated list of bcis to deoptimize at") \ 50457429Smarkm \ 50557429Smarkm product(bool, DeoptimizeRandom, false, \ 50657429Smarkm "deoptimize random frames on random exit from the runtime system")\ 50757429Smarkm \ 50857429Smarkm notproduct(bool, ZombieALot, false, \ 50957429Smarkm "creates zombies (non-entrant) at exit from the runt. system") \ 51057429Smarkm \ 51157429Smarkm notproduct(bool, WalkStackALot, false, \ 51257429Smarkm "trace stack (no print) at every exit from the runtime system") \ 51357429Smarkm \ 51457429Smarkm develop(bool, Debugging, false, \ 51557429Smarkm "set when executing debug methods in debug.ccp " \ 51657429Smarkm "(to prevent triggering assertions)") \ 51757429Smarkm \ 51857429Smarkm notproduct(bool, StrictSafepointChecks, trueInDebug, \ 51957429Smarkm "Enable strict checks that safepoints cannot happen for threads " \ 52057429Smarkm "that used No_Safepoint_Verifier") \ 52157429Smarkm \ 52257429Smarkm notproduct(bool, VerifyLastFrame, false, \ 52357429Smarkm "Verify oops on last frame on entry to VM") \ 52457429Smarkm \ 52557429Smarkm develop(bool, TraceHandleAllocation, false, \ 52657429Smarkm "Prints out warnings when suspicious many handles are allocated") \ 52757429Smarkm \ 52860573Skris product(bool, UseCompilerSafepoints, true, \ 52960573Skris "Stop at safepoints in compiled code") \ 53060573Skris \ 53160573Skris product(bool, UseSplitVerifier, true, \ 53260573Skris "use split verifier with StackMapTable attributes") \ 53360573Skris \ 53460573Skris product(bool, FailOverToOldVerifier, true, \ 53560573Skris "fail over to old verifier when split verifier fails") \ 53660573Skris \ 53760573Skris develop(bool, ShowSafepointMsgs, false, \ 53860573Skris "Show msg. about safepoint synch.") \ 53960573Skris \ 54060573Skris product(bool, SafepointTimeout, false, \ 54160573Skris "Time out and warn or fail after SafepointTimeoutDelay " \ 54260573Skris "milliseconds if failed to reach safepoint") \ 54360573Skris \ 54460573Skris develop(bool, DieOnSafepointTimeout, false, \ 54560573Skris "Die upon failure to reach safepoint (see SafepointTimeout)") \ 54660573Skris \ 54760573Skris /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 54860573Skris /* typically, at most a few retries are needed */ \ 54960573Skris product(intx, SuspendRetryCount, 50, \ 55069587Sgreen "Maximum retry count for an external suspend request") \ 55160573Skris \ 55260573Skris product(intx, SuspendRetryDelay, 5, \ 55360573Skris "Milliseconds to delay per retry (* current_retry_count)") \ 55460573Skris \ 55560573Skris product(bool, AssertOnSuspendWaitFailure, false, \ 55660573Skris "Assert/Guarantee on external suspend wait failure") \ 55760573Skris \ 55860573Skris product(bool, TraceSuspendWaitFailures, false, \ 55960573Skris "Trace external suspend wait failures") \ 56060573Skris \ 56160573Skris product(bool, MaxFDLimit, true, \ 56260573Skris "Bump the number of file descriptors to max in solaris.") \ 56360573Skris \ 56460573Skris notproduct(bool, LogEvents, trueInDebug, \ 56560573Skris "Enable Event log") \ 56660573Skris \ 56760573Skris product(bool, BytecodeVerificationRemote, true, \ 56860573Skris "Enables the Java bytecode verifier for remote classes") \ 56960573Skris \ 57060573Skris product(bool, BytecodeVerificationLocal, false, \ 57160573Skris "Enables the Java bytecode verifier for local classes") \ 57260573Skris \ 57360573Skris develop(bool, ForceFloatExceptions, trueInDebug, \ 57460573Skris "Force exceptions on FP stack under/overflow") \ 57560573Skris \ 57660573Skris develop(bool, SoftMatchFailure, trueInProduct, \ 57760573Skris "If the DFA fails to match a node, print a message and bail out") \ 57860573Skris \ 57960573Skris develop(bool, VerifyStackAtCalls, false, \ 58060573Skris "Verify that the stack pointer is unchanged after calls") \ 58160573Skris \ 58260573Skris develop(bool, TraceJavaAssertions, false, \ 58360573Skris "Trace java language assertions") \ 58460573Skris \ 58569587Sgreen notproduct(bool, CheckAssertionStatusDirectives, false, \ 58660573Skris "temporary - see javaClasses.cpp") \ 58760573Skris \ 58860573Skris notproduct(bool, PrintMallocFree, false, \ 58960573Skris "Trace calls to C heap malloc/free allocation") \ 59060573Skris \ 59160573Skris notproduct(bool, PrintOopAddress, false, \ 59260573Skris "Always print the location of the oop") \ 59360573Skris \ 59460573Skris notproduct(bool, VerifyCodeCacheOften, false, \ 59560573Skris "Verify compiled-code cache often") \ 59660573Skris \ 59760573Skris develop(bool, ZapDeadCompiledLocals, false, \ 59860573Skris "Zap dead locals in compiler frames") \ 59960573Skris \ 60060573Skris notproduct(bool, ZapDeadLocalsOld, false, \ 60160573Skris "Zap dead locals (old version, zaps all frames when " \ 60260573Skris "entering the VM") \ 60360573Skris \ 60460573Skris notproduct(bool, CheckOopishValues, false, \ 60560573Skris "Warn if value contains oop ( requires ZapDeadLocals)") \ 60660573Skris \ 60760573Skris develop(bool, UseMallocOnly, false, \ 60860573Skris "use only malloc/free for allocation (no resource area/arena)") \ 60960573Skris \ 61060573Skris develop(bool, PrintMalloc, false, \ 61169587Sgreen "print all malloc/free calls") \ 61260573Skris \ 61360573Skris develop(bool, ZapResourceArea, trueInDebug, \ 61460573Skris "Zap freed resource/arena space with 0xABABABAB") \ 61560573Skris \ 61660573Skris notproduct(bool, ZapVMHandleArea, trueInDebug, \ 61760573Skris "Zap freed VM handle space with 0xBCBCBCBC") \ 61860573Skris \ 61960573Skris develop(bool, ZapJNIHandleArea, trueInDebug, \ 62060573Skris "Zap freed JNI handle space with 0xFEFEFEFE") \ 62160573Skris \ 62260573Skris develop(bool, ZapUnusedHeapArea, trueInDebug, \ 62360573Skris "Zap unused heap space with 0xBAADBABE") \ 62460573Skris \ 62560573Skris develop(bool, TraceZapUnusedHeapArea, false, \ 62660573Skris "Trace zapping of unused heap space") \ 62760573Skris \ 62860573Skris develop(bool, CheckZapUnusedHeapArea, false, \ 62960573Skris "Check zapping of unused heap space") \ 63060573Skris \ 63160573Skris develop(bool, ZapFillerObjects, trueInDebug, \ 63260573Skris "Zap filler objects with 0xDEAFBABE") \ 63360573Skris \ 63469587Sgreen develop(bool, PrintVMMessages, true, \ 63569587Sgreen "Print vm messages on console") \ 63669587Sgreen \ 63769587Sgreen product(bool, PrintGCApplicationConcurrentTime, false, \ 63860573Skris "Print the time the application has been running") \ 63960573Skris \ 64060573Skris product(bool, PrintGCApplicationStoppedTime, false, \ 64160573Skris "Print the time the application has been stopped") \ 64260573Skris \ 64360573Skris develop(bool, Verbose, false, \ 64460573Skris "Prints additional debugging information from other modes") \ 64560573Skris \ 64660573Skris develop(bool, PrintMiscellaneous, false, \ 64760573Skris "Prints uncategorized debugging information (requires +Verbose)") \ 64860573Skris \ 64960573Skris develop(bool, WizardMode, false, \ 65060573Skris "Prints much more debugging information") \ 65160573Skris \ 65260573Skris product(bool, ShowMessageBoxOnError, false, \ 65360573Skris "Keep process alive on VM fatal error") \ 65460573Skris \ 65560573Skris product_pd(bool, UseOSErrorReporting, \ 65660573Skris "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 65760573Skris \ 65857429Smarkm product(bool, SuppressFatalErrorMessage, false, \ 65957429Smarkm "Do NO Fatal Error report [Avoid deadlock]") \ 66057429Smarkm \ 66157429Smarkm product(ccstrlist, OnError, "", \ 66257429Smarkm "Run user-defined commands on fatal error; see VMError.cpp " \ 66357429Smarkm "for examples") \ 66457429Smarkm \ 66557429Smarkm product(ccstrlist, OnOutOfMemoryError, "", \ 66657429Smarkm "Run user-defined commands on first java.lang.OutOfMemoryError") \ 66757429Smarkm \ 66857429Smarkm manageable(bool, HeapDumpBeforeFullGC, false, \ 66960573Skris "Dump heap to file before any major stop-world GC") \ 67057429Smarkm \ 67157429Smarkm manageable(bool, HeapDumpAfterFullGC, false, \ 67257429Smarkm "Dump heap to file after any major stop-world GC") \ 67357429Smarkm \ 67457429Smarkm manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 67557429Smarkm "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 67657429Smarkm \ 67757429Smarkm manageable(ccstr, HeapDumpPath, NULL, \ 67860573Skris "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 67960573Skris "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 68057429Smarkm "in the working directory)") \ 68157429Smarkm \ 68260573Skris develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 68357429Smarkm "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 68457429Smarkm "when the heap usage is larger than this") \ 68557429Smarkm \ 68657429Smarkm develop(uintx, HeapDumpSegmentSize, 1*G, \ 68757429Smarkm "Approximate segment size when generating a segmented heap dump") \ 68857429Smarkm \ 68957429Smarkm develop(bool, BreakAtWarning, false, \ 69057429Smarkm "Execute breakpoint upon encountering VM warning") \ 69157429Smarkm \ 69257429Smarkm product_pd(bool, UseVectoredExceptions, \ 69357429Smarkm "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 69457429Smarkm \ 69557429Smarkm develop(bool, TraceVMOperation, false, \ 69657429Smarkm "Trace vm operations") \ 69757429Smarkm \ 69857429Smarkm develop(bool, UseFakeTimers, false, \ 69957429Smarkm "Tells whether the VM should use system time or a fake timer") \ 70057429Smarkm \ 70157429Smarkm diagnostic(bool, LogCompilation, false, \ 70257429Smarkm "Log compilation activity in detail to hotspot.log or LogFile") \ 70357429Smarkm \ 70457429Smarkm product(bool, PrintCompilation, false, \ 70557429Smarkm "Print compilations") \ 70657429Smarkm \ 70757429Smarkm diagnostic(bool, TraceNMethodInstalls, false, \ 70857429Smarkm "Trace nmethod intallation") \ 70957429Smarkm \ 71057429Smarkm diagnostic(bool, TraceOSRBreakpoint, false, \ 71157429Smarkm "Trace OSR Breakpoint ") \ 71257429Smarkm \ 71357429Smarkm diagnostic(bool, TraceCompileTriggered, false, \ 71457429Smarkm "Trace compile triggered") \ 71557429Smarkm \ 71657429Smarkm diagnostic(bool, TraceTriggers, false, \ 71757429Smarkm "Trace triggers") \ 71857429Smarkm \ 71957429Smarkm product(bool, AlwaysRestoreFPU, false, \ 72057429Smarkm "Restore the FPU control word after every JNI call (expensive)") \ 72157429Smarkm \ 72257429Smarkm notproduct(bool, PrintCompilation2, false, \ 72357429Smarkm "Print additional statistics per compilation") \ 72460573Skris \ 72557429Smarkm diagnostic(bool, PrintAdapterHandlers, false, \ 72657429Smarkm "Print code generated for i2c/c2i adapters") \ 72757429Smarkm \ 72857429Smarkm diagnostic(bool, PrintAssembly, false, \ 72957429Smarkm "Print assembly code (using external disassembler.so)") \ 73057429Smarkm \ 73157429Smarkm diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 73257429Smarkm "Options string passed to disassembler.so") \ 73357429Smarkm \ 73457429Smarkm diagnostic(bool, PrintNMethods, false, \ 73557429Smarkm "Print assembly code for nmethods when generated") \ 73657429Smarkm \ 73757429Smarkm diagnostic(bool, PrintNativeNMethods, false, \ 73857429Smarkm "Print assembly code for native nmethods when generated") \ 73957429Smarkm \ 74057429Smarkm develop(bool, PrintDebugInfo, false, \ 74157429Smarkm "Print debug information for all nmethods when generated") \ 74257429Smarkm \ 74360573Skris develop(bool, PrintRelocations, false, \ 74457429Smarkm "Print relocation information for all nmethods when generated") \ 74557429Smarkm \ 74657429Smarkm develop(bool, PrintDependencies, false, \ 74760573Skris "Print dependency information for all nmethods when generated") \ 74857429Smarkm \ 74957429Smarkm develop(bool, PrintExceptionHandlers, false, \ 75057429Smarkm "Print exception handler tables for all nmethods when generated") \ 75157429Smarkm \ 75257429Smarkm develop(bool, InterceptOSException, false, \ 75357429Smarkm "Starts debugger when an implicit OS (e.g., NULL) " \ 75457429Smarkm "exception happens") \ 75557429Smarkm \ 75657429Smarkm notproduct(bool, PrintCodeCache, false, \ 75757429Smarkm "Print the compiled_code cache when exiting") \ 75857429Smarkm \ 75957429Smarkm develop(bool, PrintCodeCache2, false, \ 76057429Smarkm "Print detailed info on the compiled_code cache when exiting") \ 76157429Smarkm \ 76257429Smarkm diagnostic(bool, PrintStubCode, false, \ 76357429Smarkm "Print generated stub code") \ 76457429Smarkm \ 76557429Smarkm product(bool, StackTraceInThrowable, true, \ 76657429Smarkm "Collect backtrace in throwable when exception happens") \ 76757429Smarkm \ 76857429Smarkm product(bool, OmitStackTraceInFastThrow, true, \ 76957429Smarkm "Omit backtraces for some 'hot' exceptions in optimized code") \ 77057429Smarkm \ 77157429Smarkm product(bool, ProfilerPrintByteCodeStatistics, false, \ 77257429Smarkm "Prints byte code statictics when dumping profiler output") \ 77357429Smarkm \ 77457429Smarkm product(bool, ProfilerRecordPC, false, \ 77557429Smarkm "Collects tick for each 16 byte interval of compiled code") \ 77657429Smarkm \ 77757429Smarkm product(bool, ProfileVM, false, \ 77857429Smarkm "Profiles ticks that fall within VM (either in the VM Thread " \ 77957429Smarkm "or VM code called through stubs)") \ 78057429Smarkm \ 78165668Skris product(bool, ProfileIntervals, false, \ 78260573Skris "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 78357429Smarkm \ 78457429Smarkm notproduct(bool, ProfilerCheckIntervals, false, \ 78557429Smarkm "Collect and print info on spacing of profiler ticks") \ 78657429Smarkm \ 78757429Smarkm develop(bool, PrintJVMWarnings, false, \ 78857429Smarkm "Prints warnings for unimplemented JVM functions") \ 78957429Smarkm \ 79057429Smarkm notproduct(uintx, WarnOnStalledSpinLock, 0, \ 79160573Skris "Prints warnings for stalled SpinLocks") \ 79257429Smarkm \ 79357429Smarkm develop(bool, InitializeJavaLangSystem, true, \ 79457429Smarkm "Initialize java.lang.System - turn off for individual " \ 79557429Smarkm "method debugging") \ 79657429Smarkm \ 79757429Smarkm develop(bool, InitializeJavaLangString, true, \ 79857429Smarkm "Initialize java.lang.String - turn off for individual " \ 79957429Smarkm "method debugging") \ 80057429Smarkm \ 80157429Smarkm develop(bool, InitializeJavaLangExceptionsErrors, true, \ 80257429Smarkm "Initialize various error and exception classes - turn off for " \ 80357429Smarkm "individual method debugging") \ 80457429Smarkm \ 80560573Skris product(bool, RegisterFinalizersAtInit, true, \ 80657429Smarkm "Register finalizable objects at end of Object.<init> or " \ 80757429Smarkm "after allocation.") \ 80857429Smarkm \ 80957429Smarkm develop(bool, RegisterReferences, true, \ 81057429Smarkm "Tells whether the VM should register soft/weak/final/phantom " \ 81157429Smarkm "references") \ 81257429Smarkm \ 81360573Skris develop(bool, IgnoreRewrites, false, \ 81460573Skris "Supress rewrites of bytecodes in the oopmap generator. " \ 81560573Skris "This is unsafe!") \ 81657429Smarkm \ 81760573Skris develop(bool, PrintCodeCacheExtension, false, \ 81860573Skris "Print extension of code cache") \ 81960573Skris \ 82060573Skris develop(bool, UsePrivilegedStack, true, \ 82160573Skris "Enable the security JVM functions") \ 82260573Skris \ 82360573Skris develop(bool, IEEEPrecision, true, \ 82460573Skris "Enables IEEE precision (for INTEL only)") \ 82560573Skris \ 82660573Skris develop(bool, ProtectionDomainVerification, true, \ 82760573Skris "Verifies protection domain before resolution in system " \ 82860573Skris "dictionary") \ 82960573Skris \ 83060573Skris product(bool, ClassUnloading, true, \ 83157429Smarkm "Do unloading of classes") \ 83260573Skris \ 83360573Skris diagnostic(bool, LinkWellKnownClasses, false, \ 83460573Skris "Resolve a well known class as soon as its name is seen") \ 83560573Skris \ 83657429Smarkm develop(bool, DisableStartThread, false, \ 83760573Skris "Disable starting of additional Java threads " \ 83869587Sgreen "(for debugging only)") \ 83960573Skris \ 84060573Skris develop(bool, MemProfiling, false, \ 84160573Skris "Write memory usage profiling to log file") \ 84260573Skris \ 84360573Skris notproduct(bool, PrintSystemDictionaryAtExit, false, \ 84460573Skris "Prints the system dictionary at exit") \ 84560573Skris \ 84660573Skris diagnostic(bool, UnsyncloadClass, false, \ 84760573Skris "Unstable: VM calls loadClass unsynchronized. Custom " \ 84860573Skris "class loader must call VM synchronized for findClass " \ 84960573Skris "and defineClass.") \ 85060573Skris \ 85160573Skris product(bool, AlwaysLockClassLoader, false, \ 85260573Skris "Require the VM to acquire the class loader lock before calling " \ 85360573Skris "loadClass() even for class loaders registering " \ 85460573Skris "as parallel capable. Default false. ") \ 85560573Skris \ 85660573Skris product(bool, AllowParallelDefineClass, false, \ 85760573Skris "Allow parallel defineClass requests for class loaders " \ 85860573Skris "registering as parallel capable. Default false") \ 85960573Skris \ 86060573Skris product(bool, MustCallLoadClassInternal, false, \ 86160573Skris "Call loadClassInternal() rather than loadClass().Default false") \ 86260573Skris \ 86360573Skris product_pd(bool, DontYieldALot, \ 86460573Skris "Throw away obvious excess yield calls (for SOLARIS only)") \ 86560573Skris \ 86660573Skris product_pd(bool, ConvertSleepToYield, \ 86760573Skris "Converts sleep(0) to thread yield " \ 86860573Skris "(may be off for SOLARIS to improve GUI)") \ 86960573Skris \ 87060573Skris product(bool, ConvertYieldToSleep, false, \ 87160573Skris "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 87260573Skris "behavior (SOLARIS only)") \ 87360573Skris \ 87460573Skris product(bool, UseBoundThreads, true, \ 87560573Skris "Bind user level threads to kernel threads (for SOLARIS only)") \ 87660573Skris \ 87760573Skris develop(bool, UseDetachedThreads, true, \ 87860573Skris "Use detached threads that are recycled upon termination " \ 87960573Skris "(for SOLARIS only)") \ 88060573Skris \ 88160573Skris product(bool, UseLWPSynchronization, true, \ 88260573Skris "Use LWP-based instead of libthread-based synchronization " \ 88360573Skris "(SPARC only)") \ 88460573Skris \ 88560573Skris product(ccstr, SyncKnobs, NULL, \ 88660573Skris "(Unstable) Various monitor synchronization tunables") \ 88760573Skris \ 88860573Skris product(intx, EmitSync, 0, \ 88960573Skris "(Unsafe,Unstable) " \ 89060573Skris " Controls emission of inline sync fast-path code") \ 89169587Sgreen \ 89269587Sgreen product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 89360573Skris \ 89460573Skris product(intx, Atomics, 0, \ 89560573Skris "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 89660573Skris \ 89760573Skris product(intx, FenceInstruction, 0, \ 89860573Skris "(Unsafe,Unstable) Experimental") \ 89960573Skris \ 90060573Skris product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 90160573Skris \ 90260573Skris product(intx, SyncVerbose, 0, "(Unstable)" ) \ 90360573Skris \ 90460573Skris product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 90560573Skris \ 90660573Skris product(intx, hashCode, 0, \ 90760573Skris "(Unstable) select hashCode generation algorithm" ) \ 90860573Skris \ 90960573Skris product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 91060573Skris "(Unstable, Linux-specific)" \ 91160573Skris " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 91260573Skris \ 91360573Skris product(bool, FilterSpuriousWakeups , true, \ 91460573Skris "Prevent spurious or premature wakeups from object.wait" \ 91560573Skris "(Solaris only)") \ 91660573Skris \ 91760573Skris product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 91860573Skris product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 91960573Skris product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 92060573Skris \ 92160573Skris develop(bool, UsePthreads, false, \ 92260573Skris "Use pthread-based instead of libthread-based synchronization " \ 92360573Skris "(SPARC only)") \ 92460573Skris \ 92560573Skris product(bool, AdjustConcurrency, false, \ 92660573Skris "call thr_setconcurrency at thread create time to avoid " \ 92760573Skris "LWP starvation on MP systems (For Solaris Only)") \ 92860573Skris \ 92960573Skris develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 93060573Skris "Should the system attempt to update the compiler file when " \ 93160573Skris "an error occurs?") \ 93260573Skris \ 93360573Skris product(bool, ReduceSignalUsage, false, \ 93460573Skris "Reduce the use of OS signals in Java and/or the VM") \ 93560573Skris \ 93669587Sgreen notproduct(bool, ValidateMarkSweep, false, \ 93769587Sgreen "Do extra validation during MarkSweep collection") \ 93869587Sgreen \ 93969587Sgreen notproduct(bool, RecordMarkSweepCompaction, false, \ 94060573Skris "Enable GC-to-GC recording and querying of compaction during " \ 94160573Skris "MarkSweep") \ 94260573Skris \ 94360573Skris develop_pd(bool, ShareVtableStubs, \ 94460573Skris "Share vtable stubs (smaller code but worse branch prediction") \ 94560573Skris \ 94660573Skris develop(bool, LoadLineNumberTables, true, \ 94760573Skris "Tells whether the class file parser loads line number tables") \ 94860573Skris \ 94960573Skris develop(bool, LoadLocalVariableTables, true, \ 95060573Skris "Tells whether the class file parser loads local variable tables")\ 95160573Skris \ 95260573Skris develop(bool, LoadLocalVariableTypeTables, true, \ 95357429Smarkm "Tells whether the class file parser loads local variable type tables")\ 95457429Smarkm \ 95560573Skris product(bool, AllowUserSignalHandlers, false, \ 95660573Skris "Do not complain if the application installs signal handlers " \ 95760573Skris "(Solaris & Linux only)") \ 95860573Skris \ 95960573Skris product(bool, UseSignalChaining, true, \ 96060573Skris "Use signal-chaining to invoke signal handlers installed " \ 96160573Skris "by the application (Solaris & Linux only)") \ 96260573Skris \ 96360573Skris product(bool, UseAltSigs, false, \ 96460573Skris "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 96560573Skris "internal signals. (Solaris only)") \ 96660573Skris \ 96760573Skris product(bool, UseSpinning, false, \ 96860573Skris "Use spinning in monitor inflation and before entry") \ 96960573Skris \ 97060573Skris product(bool, PreSpinYield, false, \ 97160573Skris "Yield before inner spinning loop") \ 97260573Skris \ 97360573Skris product(bool, PostSpinYield, true, \ 97460573Skris "Yield after inner spinning loop") \ 97560573Skris \ 97660573Skris product(bool, AllowJNIEnvProxy, false, \ 97760573Skris "Allow JNIEnv proxies for jdbx") \ 97860573Skris \ 97960573Skris product(bool, JNIDetachReleasesMonitors, true, \ 98060573Skris "JNI DetachCurrentThread releases monitors owned by thread") \ 98160573Skris \ 98260573Skris product(bool, RestoreMXCSROnJNICalls, false, \ 98360573Skris "Restore MXCSR when returning from JNI calls") \ 98460573Skris \ 98560573Skris product(bool, CheckJNICalls, false, \ 98660573Skris "Verify all arguments to JNI calls") \ 98760573Skris \ 98860573Skris product(bool, UseFastJNIAccessors, true, \ 98960573Skris "Use optimized versions of Get<Primitive>Field") \ 99060573Skris \ 99160573Skris product(bool, EagerXrunInit, false, \ 99260573Skris "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 99360573Skris " but not all -Xrun libraries may support the state of the VM at this time") \ 99460573Skris \ 99560573Skris product(bool, PreserveAllAnnotations, false, \ 99660573Skris "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 99760573Skris \ 99860573Skris develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 99960573Skris "Number of OutOfMemoryErrors preallocated with backtrace") \ 100060573Skris \ 100160573Skris product(bool, LazyBootClassLoader, true, \ 100260573Skris "Enable/disable lazy opening of boot class path entries") \ 100360573Skris \ 100460573Skris diagnostic(bool, UseIncDec, true, \ 100560573Skris "Use INC, DEC instructions on x86") \ 100660573Skris \ 100760573Skris product(bool, UseNewLongLShift, false, \ 100860573Skris "Use optimized bitwise shift left") \ 100960573Skris \ 101060573Skris product(bool, UseStoreImmI16, true, \ 101160573Skris "Use store immediate 16-bits value instruction on x86") \ 101260573Skris \ 101360573Skris product(bool, UseAddressNop, false, \ 101460573Skris "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 101557429Smarkm \ 101657429Smarkm product(bool, UseXmmLoadAndClearUpper, true, \ 101757429Smarkm "Load low part of XMM register and clear upper part") \ 101857429Smarkm \ 101957429Smarkm product(bool, UseXmmRegToRegMoveAll, false, \ 102057429Smarkm "Copy all XMM register bits when moving value between registers") \ 102157429Smarkm \ 102257429Smarkm product(bool, UseXmmI2D, false, \ 102357429Smarkm "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 102457429Smarkm \ 102557429Smarkm product(bool, UseXmmI2F, false, \ 102657429Smarkm "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 102757429Smarkm \ 102857429Smarkm product(bool, UseXMMForArrayCopy, false, \ 102957429Smarkm "Use SSE2 MOVQ instruction for Arraycopy") \ 103057429Smarkm \ 103157429Smarkm product(bool, UseUnalignedLoadStores, false, \ 103257429Smarkm "Use SSE2 MOVDQU instruction for Arraycopy") \ 103357429Smarkm \ 103457429Smarkm product(intx, FieldsAllocationStyle, 1, \ 103557429Smarkm "0 - type based with oops first, 1 - with oops last") \ 103657429Smarkm \ 103757429Smarkm product(bool, CompactFields, true, \ 103857429Smarkm "Allocate nonstatic fields in gaps between previous fields") \ 103957429Smarkm \ 104057429Smarkm notproduct(bool, PrintCompactFieldsSavings, false, \ 104157429Smarkm "Print how many words were saved with CompactFields") \ 104257429Smarkm \ 104357429Smarkm product(bool, UseBiasedLocking, true, \ 104457429Smarkm "Enable biased locking in JVM") \ 104557429Smarkm \ 104657429Smarkm product(intx, BiasedLockingStartupDelay, 4000, \ 104757429Smarkm "Number of milliseconds to wait before enabling biased locking") \ 104857429Smarkm \ 104957429Smarkm diagnostic(bool, PrintBiasedLockingStatistics, false, \ 105057429Smarkm "Print statistics of biased locking in JVM") \ 105157429Smarkm \ 105257429Smarkm product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 105357429Smarkm "Threshold of number of revocations per type to try to " \ 105457429Smarkm "rebias all objects in the heap of that type") \ 105560573Skris \ 105660573Skris product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 105760573Skris "Threshold of number of revocations per type to permanently " \ 105860573Skris "revoke biases of all objects in the heap of that type") \ 105960573Skris \ 106060573Skris product(intx, BiasedLockingDecayTime, 25000, \ 106160573Skris "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 106260573Skris "type after previous bulk rebias") \ 106360573Skris \ 106460573Skris /* tracing */ \ 106560573Skris \ 106660573Skris notproduct(bool, TraceRuntimeCalls, false, \ 106760573Skris "Trace run-time calls") \ 106860573Skris \ 106960573Skris develop(bool, TraceJNICalls, false, \ 107060573Skris "Trace JNI calls") \ 107160573Skris \ 107260573Skris notproduct(bool, TraceJVMCalls, false, \ 107360573Skris "Trace JVM calls") \ 107460573Skris \ 107560573Skris product(ccstr, TraceJVMTI, NULL, \ 107657429Smarkm "Trace flags for JVMTI functions and events") \ 107757429Smarkm \ 107857429Smarkm /* This option can change an EMCP method into an obsolete method. */ \ 107957429Smarkm /* This can affect tests that except specific methods to be EMCP. */ \ 108057429Smarkm /* This option should be used with caution. */ \ 108157429Smarkm product(bool, StressLdcRewrite, false, \ 108257429Smarkm "Force ldc -> ldc_w rewrite during RedefineClasses") \ 108357429Smarkm \ 108457429Smarkm product(intx, TraceRedefineClasses, 0, \ 108557429Smarkm "Trace level for JVMTI RedefineClasses") \ 108657429Smarkm \ 108757429Smarkm /* change to false by default sometime after Mustang */ \ 108857429Smarkm product(bool, VerifyMergedCPBytecodes, true, \ 108957429Smarkm "Verify bytecodes after RedefineClasses constant pool merging") \ 109057429Smarkm \ 109157429Smarkm develop(bool, TraceJNIHandleAllocation, false, \ 109257429Smarkm "Trace allocation/deallocation of JNI handle blocks") \ 109357429Smarkm \ 109457429Smarkm develop(bool, TraceThreadEvents, false, \ 109557429Smarkm "Trace all thread events") \ 109657429Smarkm \ 109757429Smarkm develop(bool, TraceBytecodes, false, \ 109857429Smarkm "Trace bytecode execution") \ 109957429Smarkm \ 110057429Smarkm develop(bool, TraceClassInitialization, false, \ 110157429Smarkm "Trace class initialization") \ 110257429Smarkm \ 110357429Smarkm develop(bool, TraceExceptions, false, \ 110457429Smarkm "Trace exceptions") \ 110557429Smarkm \ 110657429Smarkm develop(bool, TraceICs, false, \ 110757429Smarkm "Trace inline cache changes") \ 110860573Skris \ 110960573Skris notproduct(bool, TraceInvocationCounterOverflow, false, \ 111060573Skris "Trace method invocation counter overflow") \ 111160573Skris \ 111260573Skris develop(bool, TraceInlineCacheClearing, false, \ 111360573Skris "Trace clearing of inline caches in nmethods") \ 111460573Skris \ 111560573Skris develop(bool, TraceDependencies, false, \ 111660573Skris "Trace dependencies") \ 111757429Smarkm \ 111857429Smarkm develop(bool, VerifyDependencies, trueInDebug, \ 111957429Smarkm "Exercise and verify the compilation dependency mechanism") \ 112057429Smarkm \ 112157429Smarkm develop(bool, TraceNewOopMapGeneration, false, \ 112257429Smarkm "Trace OopMapGeneration") \ 112357429Smarkm \ 112457429Smarkm develop(bool, TraceNewOopMapGenerationDetailed, false, \ 112557429Smarkm "Trace OopMapGeneration: print detailed cell states") \ 112657429Smarkm \ 112757429Smarkm develop(bool, TimeOopMap, false, \ 112857429Smarkm "Time calls to GenerateOopMap::compute_map() in sum") \ 112957429Smarkm \ 113057429Smarkm develop(bool, TimeOopMap2, false, \ 113157429Smarkm "Time calls to GenerateOopMap::compute_map() individually") \ 113257429Smarkm \ 113357429Smarkm develop(bool, TraceMonitorMismatch, false, \ 113457429Smarkm "Trace monitor matching failures during OopMapGeneration") \ 113557429Smarkm \ 113657429Smarkm develop(bool, TraceOopMapRewrites, false, \ 113757429Smarkm "Trace rewritting of method oops during oop map generation") \ 113857429Smarkm \ 113957429Smarkm develop(bool, TraceSafepoint, false, \ 114057429Smarkm "Trace safepoint operations") \ 114157429Smarkm \ 114257429Smarkm develop(bool, TraceICBuffer, false, \ 114357429Smarkm "Trace usage of IC buffer") \ 114457429Smarkm \ 114557429Smarkm develop(bool, TraceCompiledIC, false, \ 114657429Smarkm "Trace changes of compiled IC") \ 114760573Skris \ 114860573Skris notproduct(bool, TraceZapDeadLocals, false, \ 114960573Skris "Trace zapping dead locals") \ 115060573Skris \ 115160573Skris develop(bool, TraceStartupTime, false, \ 115260573Skris "Trace setup time") \ 115360573Skris \ 115460573Skris develop(bool, TraceHPI, false, \ 115560573Skris "Trace Host Porting Interface (HPI)") \ 115657429Smarkm \ 115757429Smarkm product(ccstr, HPILibPath, NULL, \ 115857429Smarkm "Specify alternate path to HPI library") \ 115957429Smarkm \ 116057429Smarkm develop(bool, TraceProtectionDomainVerification, false, \ 116157429Smarkm "Trace protection domain verifcation") \ 116257429Smarkm \ 116357429Smarkm develop(bool, TraceClearedExceptions, false, \ 116457429Smarkm "Prints when an exception is forcibly cleared") \ 116557429Smarkm \ 116657429Smarkm product(bool, TraceClassResolution, false, \ 116757429Smarkm "Trace all constant pool resolutions (for debugging)") \ 116857429Smarkm \ 116957429Smarkm product(bool, TraceBiasedLocking, false, \ 117057429Smarkm "Trace biased locking in JVM") \ 117157429Smarkm \ 117257429Smarkm product(bool, TraceMonitorInflation, false, \ 117357429Smarkm "Trace monitor inflation in JVM") \ 117457429Smarkm \ 117557429Smarkm /* assembler */ \ 117657429Smarkm product(bool, Use486InstrsOnly, false, \ 117757429Smarkm "Use 80486 Compliant instruction subset") \ 117857429Smarkm \ 117957429Smarkm /* gc */ \ 118057429Smarkm \ 118157429Smarkm product(bool, UseSerialGC, false, \ 118257429Smarkm "Use the serial garbage collector") \ 118357429Smarkm \ 118457429Smarkm experimental(bool, UseG1GC, false, \ 118557429Smarkm "Use the Garbage-First garbage collector") \ 118657429Smarkm \ 118757429Smarkm product(bool, UseParallelGC, false, \ 118857429Smarkm "Use the Parallel Scavenge garbage collector") \ 118957429Smarkm \ 119057429Smarkm product(bool, UseParallelOldGC, false, \ 119157429Smarkm "Use the Parallel Old garbage collector") \ 119257429Smarkm \ 119357429Smarkm product(bool, UseParallelOldGCCompacting, true, \ 119457429Smarkm "In the Parallel Old garbage collector use parallel compaction") \ 119557429Smarkm \ 119657429Smarkm product(bool, UseParallelDensePrefixUpdate, true, \ 119757429Smarkm "In the Parallel Old garbage collector use parallel dense" \ 119857429Smarkm " prefix update") \ 119957429Smarkm \ 120057429Smarkm product(uintx, HeapMaximumCompactionInterval, 20, \ 120157429Smarkm "How often should we maximally compact the heap (not allowing " \ 120257429Smarkm "any dead space)") \ 120357429Smarkm \ 120457429Smarkm product(uintx, HeapFirstMaximumCompactionCount, 3, \ 120557429Smarkm "The collection count for the first maximum compaction") \ 120657429Smarkm \ 120757429Smarkm product(bool, UseMaximumCompactionOnSystemGC, true, \ 120857429Smarkm "In the Parallel Old garbage collector maximum compaction for " \ 120957429Smarkm "a system GC") \ 121057429Smarkm \ 121157429Smarkm product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 121257429Smarkm "The mean used by the par compact dead wood" \ 121357429Smarkm "limiter (a number between 0-100).") \ 121457429Smarkm \ 121557429Smarkm product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 121657429Smarkm "The standard deviation used by the par compact dead wood" \ 121757429Smarkm "limiter (a number between 0-100).") \ 121857429Smarkm \ 121957429Smarkm product(bool, UseParallelOldGCDensePrefix, true, \ 122057429Smarkm "Use a dense prefix with the Parallel Old garbage collector") \ 122157429Smarkm \ 122257429Smarkm product(uintx, ParallelGCThreads, 0, \ 122357429Smarkm "Number of parallel threads parallel gc will use") \ 122457429Smarkm \ 122557429Smarkm product(uintx, ParallelCMSThreads, 0, \ 122657429Smarkm "Max number of threads CMS will use for concurrent work") \ 122757429Smarkm \ 122857429Smarkm develop(bool, ParallelOldGCSplitALot, false, \ 122957429Smarkm "Provoke splitting (copying data from a young gen space to" \ 123057429Smarkm "multiple destination spaces)") \ 123157429Smarkm \ 123257429Smarkm develop(uintx, ParallelOldGCSplitInterval, 3, \ 123357429Smarkm "How often to provoke splitting a young gen space") \ 123457429Smarkm \ 123557429Smarkm develop(bool, TraceRegionTasksQueuing, false, \ 123657429Smarkm "Trace the queuing of the region tasks") \ 123757429Smarkm \ 123857429Smarkm product(uintx, ParallelMarkingThreads, 0, \ 123957429Smarkm "Number of marking threads concurrent gc will use") \ 124057429Smarkm \ 124157429Smarkm product(uintx, YoungPLABSize, 4096, \ 124257429Smarkm "Size of young gen promotion labs (in HeapWords)") \ 124357429Smarkm \ 124457429Smarkm product(uintx, OldPLABSize, 1024, \ 124557429Smarkm "Size of old gen promotion labs (in HeapWords)") \ 124657429Smarkm \ 124757429Smarkm product(uintx, GCTaskTimeStampEntries, 200, \ 124857429Smarkm "Number of time stamp entries per gc worker thread") \ 124957429Smarkm \ 125057429Smarkm product(bool, AlwaysTenure, false, \ 125157429Smarkm "Always tenure objects in eden. (ParallelGC only)") \ 125257429Smarkm \ 125357429Smarkm product(bool, NeverTenure, false, \ 125457429Smarkm "Never tenure objects in eden, May tenure on overflow" \ 125557429Smarkm " (ParallelGC only)") \ 125657429Smarkm \ 125757429Smarkm product(bool, ScavengeBeforeFullGC, true, \ 125857429Smarkm "Scavenge youngest generation before each full GC," \ 125957429Smarkm " used with UseParallelGC") \ 126057429Smarkm \ 126157429Smarkm develop(bool, ScavengeWithObjectsInToSpace, false, \ 126257429Smarkm "Allow scavenges to occur when to_space contains objects.") \ 126357429Smarkm \ 126457429Smarkm product(bool, UseConcMarkSweepGC, false, \ 126557429Smarkm "Use Concurrent Mark-Sweep GC in the old generation") \ 126657429Smarkm \ 126757429Smarkm product(bool, ExplicitGCInvokesConcurrent, false, \ 126857429Smarkm "A System.gc() request invokes a concurrent collection;" \ 126957429Smarkm " (effective only when UseConcMarkSweepGC)") \ 127057429Smarkm \ 127157429Smarkm product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 127257429Smarkm "A System.gc() request invokes a concurrent collection and" \ 127357429Smarkm " also unloads classes during such a concurrent gc cycle " \ 127457429Smarkm " (effective only when UseConcMarkSweepGC)") \ 127557429Smarkm \ 127657429Smarkm develop(bool, UseCMSAdaptiveFreeLists, true, \ 127757429Smarkm "Use Adaptive Free Lists in the CMS generation") \ 127857429Smarkm \ 127957429Smarkm develop(bool, UseAsyncConcMarkSweepGC, true, \ 128057429Smarkm "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 128157429Smarkm \ 128257429Smarkm develop(bool, RotateCMSCollectionTypes, false, \ 128357429Smarkm "Rotate the CMS collections among concurrent and STW") \ 128457429Smarkm \ 128557429Smarkm product(bool, UseCMSBestFit, true, \ 128660573Skris "Use CMS best fit allocation strategy") \ 128760573Skris \ 128857429Smarkm product(bool, UseCMSCollectionPassing, true, \ 128957429Smarkm "Use passing of collection from background to foreground") \ 129057429Smarkm \ 129157429Smarkm product(bool, UseParNewGC, false, \ 129257429Smarkm "Use parallel threads in the new generation.") \ 129357429Smarkm \ 129457429Smarkm product(bool, ParallelGCVerbose, false, \ 129557429Smarkm "Verbose output for parallel GC.") \ 129657429Smarkm \ 129757429Smarkm product(intx, ParallelGCBufferWastePct, 10, \ 1298 "wasted fraction of parallel allocation buffer.") \ 1299 \ 1300 product(bool, ParallelGCRetainPLAB, true, \ 1301 "Retain parallel allocation buffers across scavenges.") \ 1302 \ 1303 product(intx, TargetPLABWastePct, 10, \ 1304 "target wasted space in last buffer as pct of overall allocation")\ 1305 \ 1306 product(uintx, PLABWeight, 75, \ 1307 "Percentage (0-100) used to weight the current sample when" \ 1308 "computing exponentially decaying average for ResizePLAB.") \ 1309 \ 1310 product(bool, ResizePLAB, true, \ 1311 "Dynamically resize (survivor space) promotion labs") \ 1312 \ 1313 product(bool, PrintPLAB, false, \ 1314 "Print (survivor space) promotion labs sizing decisions") \ 1315 \ 1316 product(intx, ParGCArrayScanChunk, 50, \ 1317 "Scan a subset and push remainder, if array is bigger than this") \ 1318 \ 1319 product(bool, ParGCUseLocalOverflow, false, \ 1320 "Instead of a global overflow list, use local overflow stacks") \ 1321 \ 1322 product(bool, ParGCTrimOverflow, true, \ 1323 "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1324 \ 1325 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1326 "Whether we should simulate work queue overflow in ParNew") \ 1327 \ 1328 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1329 "An `interval' counter that determines how frequently" \ 1330 " we simulate overflow; a smaller number increases frequency") \ 1331 \ 1332 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1333 "The desired number of objects to claim from the overflow list") \ 1334 \ 1335 product(uintx, CMSParPromoteBlocksToClaim, 50, \ 1336 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1337 "parallel GC.") \ 1338 \ 1339 product(bool, AlwaysPreTouch, false, \ 1340 "It forces all freshly committed pages to be pre-touched.") \ 1341 \ 1342 product(bool, CMSUseOldDefaults, false, \ 1343 "A flag temporarily introduced to allow reverting to some older" \ 1344 "default settings; older as of 6.0 ") \ 1345 \ 1346 product(intx, CMSYoungGenPerWorker, 16*M, \ 1347 "The amount of young gen chosen by default per GC worker " \ 1348 "thread available ") \ 1349 \ 1350 product(bool, GCOverheadReporting, false, \ 1351 "Enables the GC overhead reporting facility") \ 1352 \ 1353 product(intx, GCOverheadReportingPeriodMS, 100, \ 1354 "Reporting period for conc GC overhead reporting, in ms ") \ 1355 \ 1356 product(bool, CMSIncrementalMode, false, \ 1357 "Whether CMS GC should operate in \"incremental\" mode") \ 1358 \ 1359 product(uintx, CMSIncrementalDutyCycle, 10, \ 1360 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1361 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1362 "value") \ 1363 \ 1364 product(bool, CMSIncrementalPacing, true, \ 1365 "Whether the CMS incremental mode duty cycle should be " \ 1366 "automatically adjusted") \ 1367 \ 1368 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1369 "Lower bound on the duty cycle when CMSIncrementalPacing is" \ 1370 "enabled (a percentage, 0-100).") \ 1371 \ 1372 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1373 "Percentage (0-100) used to add conservatism when computing the" \ 1374 "duty cycle.") \ 1375 \ 1376 product(uintx, CMSIncrementalOffset, 0, \ 1377 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1378 "is shifted to the right within the period between young GCs") \ 1379 \ 1380 product(uintx, CMSExpAvgFactor, 25, \ 1381 "Percentage (0-100) used to weight the current sample when" \ 1382 "computing exponential averages for CMS statistics.") \ 1383 \ 1384 product(uintx, CMS_FLSWeight, 50, \ 1385 "Percentage (0-100) used to weight the current sample when" \ 1386 "computing exponentially decating averages for CMS FLS statistics.") \ 1387 \ 1388 product(uintx, CMS_FLSPadding, 2, \ 1389 "The multiple of deviation from mean to use for buffering" \ 1390 "against volatility in free list demand.") \ 1391 \ 1392 product(uintx, FLSCoalescePolicy, 2, \ 1393 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1394 \ 1395 product(uintx, CMS_SweepWeight, 50, \ 1396 "Percentage (0-100) used to weight the current sample when" \ 1397 "computing exponentially decaying average for inter-sweep duration.") \ 1398 \ 1399 product(uintx, CMS_SweepPadding, 2, \ 1400 "The multiple of deviation from mean to use for buffering" \ 1401 "against volatility in inter-sweep duration.") \ 1402 \ 1403 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1404 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1405 " duration exceeds this threhold in milliseconds") \ 1406 \ 1407 develop(bool, CMSTraceIncrementalMode, false, \ 1408 "Trace CMS incremental mode") \ 1409 \ 1410 develop(bool, CMSTraceIncrementalPacing, false, \ 1411 "Trace CMS incremental mode pacing computation") \ 1412 \ 1413 develop(bool, CMSTraceThreadState, false, \ 1414 "Trace the CMS thread state (enable the trace_state() method)") \ 1415 \ 1416 product(bool, CMSClassUnloadingEnabled, false, \ 1417 "Whether class unloading enabled when using CMS GC") \ 1418 \ 1419 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1420 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1421 " for which classes may not be unloaded") \ 1422 \ 1423 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1424 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1425 \ 1426 product(bool, UseCMSCompactAtFullCollection, true, \ 1427 "Use mark sweep compact at full collections") \ 1428 \ 1429 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1430 "Number of CMS full collection done before compaction if > 0") \ 1431 \ 1432 develop(intx, CMSDictionaryChoice, 0, \ 1433 "Use BinaryTreeDictionary as default in the CMS generation") \ 1434 \ 1435 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1436 "Replenish and indexed free list with this number of chunks") \ 1437 \ 1438 product(bool, CMSLoopWarn, false, \ 1439 "Warn in case of excessive CMS looping") \ 1440 \ 1441 develop(bool, CMSOverflowEarlyRestoration, false, \ 1442 "Whether preserved marks should be restored early") \ 1443 \ 1444 product(uintx, CMSMarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1445 "Size of CMS marking stack") \ 1446 \ 1447 product(uintx, CMSMarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1448 "Max size of CMS marking stack") \ 1449 \ 1450 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1451 "Whether we should simulate frequent marking stack / work queue" \ 1452 " overflow") \ 1453 \ 1454 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1455 "An `interval' counter that determines how frequently" \ 1456 " we simulate overflow; a smaller number increases frequency") \ 1457 \ 1458 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1459 "(Temporary, subject to experimentation)" \ 1460 "Maximum number of abortable preclean iterations, if > 0") \ 1461 \ 1462 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1463 "(Temporary, subject to experimentation)" \ 1464 "Maximum time in abortable preclean in ms") \ 1465 \ 1466 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1467 "(Temporary, subject to experimentation)" \ 1468 "Nominal minimum work per abortable preclean iteration") \ 1469 \ 1470 product(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1471 "(Temporary, subject to experimentation)" \ 1472 " Time that we sleep between iterations when not given" \ 1473 " enough work per iteration") \ 1474 \ 1475 product(uintx, CMSRescanMultiple, 32, \ 1476 "Size (in cards) of CMS parallel rescan task") \ 1477 \ 1478 product(uintx, CMSConcMarkMultiple, 32, \ 1479 "Size (in cards) of CMS concurrent MT marking task") \ 1480 \ 1481 product(uintx, CMSRevisitStackSize, 1*M, \ 1482 "Size of CMS KlassKlass revisit stack") \ 1483 \ 1484 product(bool, CMSAbortSemantics, false, \ 1485 "Whether abort-on-overflow semantics is implemented") \ 1486 \ 1487 product(bool, CMSParallelRemarkEnabled, true, \ 1488 "Whether parallel remark enabled (only if ParNewGC)") \ 1489 \ 1490 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1491 "Whether parallel remark of survivor space" \ 1492 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1493 \ 1494 product(bool, CMSPLABRecordAlways, true, \ 1495 "Whether to always record survivor space PLAB bdries" \ 1496 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1497 \ 1498 product(bool, CMSConcurrentMTEnabled, true, \ 1499 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1500 \ 1501 product(bool, CMSPermGenPrecleaningEnabled, true, \ 1502 "Whether concurrent precleaning enabled in perm gen" \ 1503 " (effective only when CMSPrecleaningEnabled is true)") \ 1504 \ 1505 product(bool, CMSPrecleaningEnabled, true, \ 1506 "Whether concurrent precleaning enabled") \ 1507 \ 1508 product(uintx, CMSPrecleanIter, 3, \ 1509 "Maximum number of precleaning iteration passes") \ 1510 \ 1511 product(uintx, CMSPrecleanNumerator, 2, \ 1512 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1513 " ratio") \ 1514 \ 1515 product(uintx, CMSPrecleanDenominator, 3, \ 1516 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1517 " ratio") \ 1518 \ 1519 product(bool, CMSPrecleanRefLists1, true, \ 1520 "Preclean ref lists during (initial) preclean phase") \ 1521 \ 1522 product(bool, CMSPrecleanRefLists2, false, \ 1523 "Preclean ref lists during abortable preclean phase") \ 1524 \ 1525 product(bool, CMSPrecleanSurvivors1, false, \ 1526 "Preclean survivors during (initial) preclean phase") \ 1527 \ 1528 product(bool, CMSPrecleanSurvivors2, true, \ 1529 "Preclean survivors during abortable preclean phase") \ 1530 \ 1531 product(uintx, CMSPrecleanThreshold, 1000, \ 1532 "Don't re-iterate if #dirty cards less than this") \ 1533 \ 1534 product(bool, CMSCleanOnEnter, true, \ 1535 "Clean-on-enter optimization for reducing number of dirty cards") \ 1536 \ 1537 product(uintx, CMSRemarkVerifyVariant, 1, \ 1538 "Choose variant (1,2) of verification following remark") \ 1539 \ 1540 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1541 "If Eden used is below this value, don't try to schedule remark") \ 1542 \ 1543 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1544 "The Eden occupancy % at which to try and schedule remark pause") \ 1545 \ 1546 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1547 "Start sampling Eden top at least before yg occupancy reaches" \ 1548 " 1/<ratio> of the size at which we plan to schedule remark") \ 1549 \ 1550 product(uintx, CMSSamplingGrain, 16*K, \ 1551 "The minimum distance between eden samples for CMS (see above)") \ 1552 \ 1553 product(bool, CMSScavengeBeforeRemark, false, \ 1554 "Attempt scavenge before the CMS remark step") \ 1555 \ 1556 develop(bool, CMSTraceSweeper, false, \ 1557 "Trace some actions of the CMS sweeper") \ 1558 \ 1559 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1560 "Don't drain below this size per parallel worker/thief") \ 1561 \ 1562 product(intx, CMSWaitDuration, 2000, \ 1563 "Time in milliseconds that CMS thread waits for young GC") \ 1564 \ 1565 product(bool, CMSYield, true, \ 1566 "Yield between steps of concurrent mark & sweep") \ 1567 \ 1568 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1569 "Bitmap operations should process at most this many bits" \ 1570 "between yields") \ 1571 \ 1572 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1573 "Verify that all refs across the FLS boundary " \ 1574 " are to valid objects") \ 1575 \ 1576 diagnostic(bool, FLSVerifyLists, false, \ 1577 "Do lots of (expensive) FreeListSpace verification") \ 1578 \ 1579 diagnostic(bool, FLSVerifyIndexTable, false, \ 1580 "Do lots of (expensive) FLS index table verification") \ 1581 \ 1582 develop(bool, FLSVerifyDictionary, false, \ 1583 "Do lots of (expensive) FLS dictionary verification") \ 1584 \ 1585 develop(bool, VerifyBlockOffsetArray, false, \ 1586 "Do (expensive!) block offset array verification") \ 1587 \ 1588 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \ 1589 "Maintain _unallocated_block in BlockOffsetArray" \ 1590 " (currently applicable only to CMS collector)") \ 1591 \ 1592 develop(bool, TraceCMSState, false, \ 1593 "Trace the state of the CMS collection") \ 1594 \ 1595 product(intx, RefDiscoveryPolicy, 0, \ 1596 "Whether reference-based(0) or referent-based(1)") \ 1597 \ 1598 product(bool, ParallelRefProcEnabled, false, \ 1599 "Enable parallel reference processing whenever possible") \ 1600 \ 1601 product(bool, ParallelRefProcBalancingEnabled, true, \ 1602 "Enable balancing of reference processing queues") \ 1603 \ 1604 product(intx, CMSTriggerRatio, 80, \ 1605 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1606 " allocated before a CMS collection cycle commences") \ 1607 \ 1608 product(intx, CMSTriggerPermRatio, 80, \ 1609 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \ 1610 " is allocated before a CMS collection cycle commences, that " \ 1611 " also collects the perm generation") \ 1612 \ 1613 product(uintx, CMSBootstrapOccupancy, 50, \ 1614 "Percentage CMS generation occupancy at which to " \ 1615 " initiate CMS collection for bootstrapping collection stats") \ 1616 \ 1617 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1618 "Percentage CMS generation occupancy to start a CMS collection " \ 1619 " cycle (A negative value means that CMSTriggerRatio is used)") \ 1620 \ 1621 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 1622 "Percentage CMS perm generation occupancy to start a CMScollection"\ 1623 " cycle (A negative value means that CMSTriggerPermRatio is used)")\ 1624 \ 1625 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1626 "Only use occupancy as a crierion for starting a CMS collection") \ 1627 \ 1628 product(intx, CMSIsTooFullPercentage, 98, \ 1629 "An absolute ceiling above which CMS will always consider the" \ 1630 " perm gen ripe for collection") \ 1631 \ 1632 develop(bool, CMSTestInFreeList, false, \ 1633 "Check if the coalesced range is already in the " \ 1634 "free lists as claimed.") \ 1635 \ 1636 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1637 "Check that all the garbage collected was returned to the " \ 1638 "free lists.") \ 1639 \ 1640 notproduct(bool, ScavengeALot, false, \ 1641 "Force scavenge at every Nth exit from the runtime system " \ 1642 "(N=ScavengeALotInterval)") \ 1643 \ 1644 develop(bool, FullGCALot, false, \ 1645 "Force full gc at every Nth exit from the runtime system " \ 1646 "(N=FullGCALotInterval)") \ 1647 \ 1648 notproduct(bool, GCALotAtAllSafepoints, false, \ 1649 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1650 \ 1651 product(bool, HandlePromotionFailure, true, \ 1652 "The youngest generation collection does not require" \ 1653 " a guarantee of full promotion of all live objects.") \ 1654 \ 1655 notproduct(bool, PromotionFailureALot, false, \ 1656 "Use promotion failure handling on every youngest generation " \ 1657 "collection") \ 1658 \ 1659 develop(uintx, PromotionFailureALotCount, 1000, \ 1660 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1661 "refill attempts (ParNew) or promotion attempts " \ 1662 "(other young collectors) ") \ 1663 \ 1664 develop(uintx, PromotionFailureALotInterval, 5, \ 1665 "Total collections between promotion failures alot") \ 1666 \ 1667 develop(intx, WorkStealingSleepMillis, 1, \ 1668 "Sleep time when sleep is used for yields") \ 1669 \ 1670 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ 1671 "Number of yields before a sleep is done during workstealing") \ 1672 \ 1673 develop(uintx, WorkStealingHardSpins, 4096, \ 1674 "Number of iterations in a spin loop between checks on " \ 1675 "time out of hard spin") \ 1676 \ 1677 develop(uintx, WorkStealingSpinToYieldRatio, 10, \ 1678 "Ratio of hard spins to calls to yield") \ 1679 \ 1680 product(uintx, PreserveMarkStackSize, 1024, \ 1681 "Size for stack used in promotion failure handling") \ 1682 \ 1683 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1684 \ 1685 product_pd(bool, ResizeTLAB, \ 1686 "Dynamically resize tlab size for threads") \ 1687 \ 1688 product(bool, ZeroTLAB, false, \ 1689 "Zero out the newly created TLAB") \ 1690 \ 1691 product(bool, FastTLABRefill, true, \ 1692 "Use fast TLAB refill code") \ 1693 \ 1694 product(bool, PrintTLAB, false, \ 1695 "Print various TLAB related information") \ 1696 \ 1697 product(bool, TLABStats, true, \ 1698 "Print various TLAB related information") \ 1699 \ 1700 product_pd(bool, NeverActAsServerClassMachine, \ 1701 "Never act like a server-class machine") \ 1702 \ 1703 product(bool, AlwaysActAsServerClassMachine, false, \ 1704 "Always act like a server-class machine") \ 1705 \ 1706 product_pd(uintx, DefaultMaxRAM, \ 1707 "Maximum real memory size for setting server class heap size") \ 1708 \ 1709 product(uintx, DefaultMaxRAMFraction, 4, \ 1710 "Fraction (1/n) of real memory used for server class max heap") \ 1711 \ 1712 product(uintx, DefaultInitialRAMFraction, 64, \ 1713 "Fraction (1/n) of real memory used for server class initial heap") \ 1714 \ 1715 product(bool, UseAutoGCSelectPolicy, false, \ 1716 "Use automatic collection selection policy") \ 1717 \ 1718 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1719 "Automatic GC selection pause threshhold in ms") \ 1720 \ 1721 product(bool, UseAdaptiveSizePolicy, true, \ 1722 "Use adaptive generation sizing policies") \ 1723 \ 1724 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1725 "Use adaptive survivor sizing policies") \ 1726 \ 1727 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1728 "Use adaptive young-old sizing policies at minor collections") \ 1729 \ 1730 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1731 "Use adaptive young-old sizing policies at major collections") \ 1732 \ 1733 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1734 "Use statistics from System.GC for adaptive size policy") \ 1735 \ 1736 product(bool, UseAdaptiveGCBoundary, false, \ 1737 "Allow young-old boundary to move") \ 1738 \ 1739 develop(bool, TraceAdaptiveGCBoundary, false, \ 1740 "Trace young-old boundary moves") \ 1741 \ 1742 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1743 "Resize the virtual spaces of the young or old generations") \ 1744 \ 1745 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1746 "Policy for changeing generation size for throughput goals") \ 1747 \ 1748 product(uintx, AdaptiveSizePausePolicy, 0, \ 1749 "Policy for changing generation size for pause goals") \ 1750 \ 1751 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1752 "Adjust tenured generation to achive a minor pause goal") \ 1753 \ 1754 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 1755 "Adjust young generation to achive a major pause goal") \ 1756 \ 1757 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 1758 "Number of steps where heuristics is used before data is used") \ 1759 \ 1760 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 1761 "Number of collections before the adaptive sizing is started") \ 1762 \ 1763 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 1764 "Collecton interval for printing information, zero => never") \ 1765 \ 1766 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 1767 "Use adaptive minimum footprint as a goal") \ 1768 \ 1769 product(uintx, AdaptiveSizePolicyWeight, 10, \ 1770 "Weight given to exponential resizing, between 0 and 100") \ 1771 \ 1772 product(uintx, AdaptiveTimeWeight, 25, \ 1773 "Weight given to time in adaptive policy, between 0 and 100") \ 1774 \ 1775 product(uintx, PausePadding, 1, \ 1776 "How much buffer to keep for pause time") \ 1777 \ 1778 product(uintx, PromotedPadding, 3, \ 1779 "How much buffer to keep for promotion failure") \ 1780 \ 1781 product(uintx, SurvivorPadding, 3, \ 1782 "How much buffer to keep for survivor overflow") \ 1783 \ 1784 product(uintx, AdaptivePermSizeWeight, 20, \ 1785 "Weight for perm gen exponential resizing, between 0 and 100") \ 1786 \ 1787 product(uintx, PermGenPadding, 3, \ 1788 "How much buffer to keep for perm gen sizing") \ 1789 \ 1790 product(uintx, ThresholdTolerance, 10, \ 1791 "Allowed collection cost difference between generations") \ 1792 \ 1793 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 1794 "If collection costs are within margin, reduce both by full delta") \ 1795 \ 1796 product(uintx, YoungGenerationSizeIncrement, 20, \ 1797 "Adaptive size percentage change in young generation") \ 1798 \ 1799 product(uintx, YoungGenerationSizeSupplement, 80, \ 1800 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 1801 \ 1802 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 1803 "Decay factor to YoungedGenerationSizeSupplement") \ 1804 \ 1805 product(uintx, TenuredGenerationSizeIncrement, 20, \ 1806 "Adaptive size percentage change in tenured generation") \ 1807 \ 1808 product(uintx, TenuredGenerationSizeSupplement, 80, \ 1809 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 1810 \ 1811 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 1812 "Decay factor to TenuredGenerationSizeIncrement") \ 1813 \ 1814 product(uintx, MaxGCPauseMillis, max_uintx, \ 1815 "Adaptive size policy maximum GC pause time goal in msec") \ 1816 \ 1817 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 1818 "Adaptive size policy maximum GC minor pause time goal in msec") \ 1819 \ 1820 product(uintx, GCTimeRatio, 99, \ 1821 "Adaptive size policy application time to GC time ratio") \ 1822 \ 1823 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 1824 "Adaptive size scale down factor for shrinking") \ 1825 \ 1826 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 1827 "Adaptive size decays the major cost for long major intervals") \ 1828 \ 1829 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 1830 "Time scale over which major costs decay") \ 1831 \ 1832 product(uintx, MinSurvivorRatio, 3, \ 1833 "Minimum ratio of young generation/survivor space size") \ 1834 \ 1835 product(uintx, InitialSurvivorRatio, 8, \ 1836 "Initial ratio of eden/survivor space size") \ 1837 \ 1838 product(uintx, BaseFootPrintEstimate, 256*M, \ 1839 "Estimate of footprint other than Java Heap") \ 1840 \ 1841 product(bool, UseGCOverheadLimit, true, \ 1842 "Use policy to limit of proportion of time spent in GC " \ 1843 "before an OutOfMemory error is thrown") \ 1844 \ 1845 product(uintx, GCTimeLimit, 98, \ 1846 "Limit of proportion of time spent in GC before an OutOfMemory" \ 1847 "error is thrown (used with GCHeapFreeLimit)") \ 1848 \ 1849 product(uintx, GCHeapFreeLimit, 2, \ 1850 "Minimum percentage of free space after a full GC before an " \ 1851 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 1852 \ 1853 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 1854 "Number of consecutive collections before gc time limit fires") \ 1855 \ 1856 product(bool, PrintAdaptiveSizePolicy, false, \ 1857 "Print information about AdaptiveSizePolicy") \ 1858 \ 1859 product(intx, PrefetchCopyIntervalInBytes, -1, \ 1860 "How far ahead to prefetch destination area (<= 0 means off)") \ 1861 \ 1862 product(intx, PrefetchScanIntervalInBytes, -1, \ 1863 "How far ahead to prefetch scan area (<= 0 means off)") \ 1864 \ 1865 product(intx, PrefetchFieldsAhead, -1, \ 1866 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 1867 \ 1868 develop(bool, UsePrefetchQueue, true, \ 1869 "Use the prefetch queue during PS promotion") \ 1870 \ 1871 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 1872 "Verify system before exiting") \ 1873 \ 1874 diagnostic(bool, VerifyBeforeGC, false, \ 1875 "Verify memory system before GC") \ 1876 \ 1877 diagnostic(bool, VerifyAfterGC, false, \ 1878 "Verify memory system after GC") \ 1879 \ 1880 diagnostic(bool, VerifyDuringGC, false, \ 1881 "Verify memory system during GC (between phases)") \ 1882 \ 1883 diagnostic(bool, GCParallelVerificationEnabled, true, \ 1884 "Enable parallel memory system verification") \ 1885 \ 1886 diagnostic(bool, VerifyRememberedSets, false, \ 1887 "Verify GC remembered sets") \ 1888 \ 1889 diagnostic(bool, VerifyObjectStartArray, true, \ 1890 "Verify GC object start array if verify before/after") \ 1891 \ 1892 product(bool, DisableExplicitGC, false, \ 1893 "Tells whether calling System.gc() does a full GC") \ 1894 \ 1895 notproduct(bool, CheckMemoryInitialization, false, \ 1896 "Checks memory initialization") \ 1897 \ 1898 product(bool, CollectGen0First, false, \ 1899 "Collect youngest generation before each full GC") \ 1900 \ 1901 diagnostic(bool, BindCMSThreadToCPU, false, \ 1902 "Bind CMS Thread to CPU if possible") \ 1903 \ 1904 diagnostic(uintx, CPUForCMSThread, 0, \ 1905 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 1906 \ 1907 product(bool, BindGCTaskThreadsToCPUs, false, \ 1908 "Bind GCTaskThreads to CPUs if possible") \ 1909 \ 1910 product(bool, UseGCTaskAffinity, false, \ 1911 "Use worker affinity when asking for GCTasks") \ 1912 \ 1913 product(uintx, ProcessDistributionStride, 4, \ 1914 "Stride through processors when distributing processes") \ 1915 \ 1916 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 1917 "number of times the coordinator GC thread will sleep while " \ 1918 "yielding before giving up and resuming GC") \ 1919 \ 1920 product(uintx, CMSYieldSleepCount, 0, \ 1921 "number of times a GC thread (minus the coordinator) " \ 1922 "will sleep while yielding before giving up and resuming GC") \ 1923 \ 1924 notproduct(bool, PrintFlagsFinal, false, \ 1925 "Print all command line flags after argument processing") \ 1926 \ 1927 /* gc tracing */ \ 1928 manageable(bool, PrintGC, false, \ 1929 "Print message at garbage collect") \ 1930 \ 1931 manageable(bool, PrintGCDetails, false, \ 1932 "Print more details at garbage collect") \ 1933 \ 1934 manageable(bool, PrintGCDateStamps, false, \ 1935 "Print date stamps at garbage collect") \ 1936 \ 1937 manageable(bool, PrintGCTimeStamps, false, \ 1938 "Print timestamps at garbage collect") \ 1939 \ 1940 product(bool, PrintGCTaskTimeStamps, false, \ 1941 "Print timestamps for individual gc worker thread tasks") \ 1942 \ 1943 develop(intx, ConcGCYieldTimeout, 0, \ 1944 "If non-zero, assert that GC threads yield within this # of ms.") \ 1945 \ 1946 notproduct(bool, TraceMarkSweep, false, \ 1947 "Trace mark sweep") \ 1948 \ 1949 product(bool, PrintReferenceGC, false, \ 1950 "Print times spent handling reference objects during GC " \ 1951 " (enabled only when PrintGCDetails)") \ 1952 \ 1953 develop(bool, TraceReferenceGC, false, \ 1954 "Trace handling of soft/weak/final/phantom references") \ 1955 \ 1956 develop(bool, TraceFinalizerRegistration, false, \ 1957 "Trace registration of final references") \ 1958 \ 1959 notproduct(bool, TraceScavenge, false, \ 1960 "Trace scavenge") \ 1961 \ 1962 product_rw(bool, TraceClassLoading, false, \ 1963 "Trace all classes loaded") \ 1964 \ 1965 product(bool, TraceClassLoadingPreorder, false, \ 1966 "Trace all classes loaded in order referenced (not loaded)") \ 1967 \ 1968 product_rw(bool, TraceClassUnloading, false, \ 1969 "Trace unloading of classes") \ 1970 \ 1971 product_rw(bool, TraceLoaderConstraints, false, \ 1972 "Trace loader constraints") \ 1973 \ 1974 product(bool, TraceGen0Time, false, \ 1975 "Trace accumulated time for Gen 0 collection") \ 1976 \ 1977 product(bool, TraceGen1Time, false, \ 1978 "Trace accumulated time for Gen 1 collection") \ 1979 \ 1980 product(bool, PrintTenuringDistribution, false, \ 1981 "Print tenuring age information") \ 1982 \ 1983 product_rw(bool, PrintHeapAtGC, false, \ 1984 "Print heap layout before and after each GC") \ 1985 \ 1986 product(bool, PrintHeapAtSIGBREAK, true, \ 1987 "Print heap layout in response to SIGBREAK") \ 1988 \ 1989 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 1990 "Print a class histogram before any major stop-world GC") \ 1991 \ 1992 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 1993 "Print a class histogram after any major stop-world GC") \ 1994 \ 1995 manageable(bool, PrintClassHistogram, false, \ 1996 "Print a histogram of class instances") \ 1997 \ 1998 develop(bool, TraceWorkGang, false, \ 1999 "Trace activities of work gangs") \ 2000 \ 2001 product(bool, TraceParallelOldGCTasks, false, \ 2002 "Trace multithreaded GC activity") \ 2003 \ 2004 develop(bool, TraceBlockOffsetTable, false, \ 2005 "Print BlockOffsetTable maps") \ 2006 \ 2007 develop(bool, TraceCardTableModRefBS, false, \ 2008 "Print CardTableModRefBS maps") \ 2009 \ 2010 develop(bool, TraceGCTaskManager, false, \ 2011 "Trace actions of the GC task manager") \ 2012 \ 2013 develop(bool, TraceGCTaskQueue, false, \ 2014 "Trace actions of the GC task queues") \ 2015 \ 2016 develop(bool, TraceGCTaskThread, false, \ 2017 "Trace actions of the GC task threads") \ 2018 \ 2019 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2020 "Print the time taken by each parallel old gc phase." \ 2021 "PrintGCDetails must also be enabled.") \ 2022 \ 2023 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2024 "Trace parallel old gc marking phase") \ 2025 \ 2026 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2027 "Trace parallel old gc summary phase") \ 2028 \ 2029 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2030 "Trace parallel old gc compaction phase") \ 2031 \ 2032 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2033 "Trace parallel old gc dense prefix computation") \ 2034 \ 2035 develop(bool, IgnoreLibthreadGPFault, false, \ 2036 "Suppress workaround for libthread GP fault") \ 2037 \ 2038 product(bool, PrintJNIGCStalls, false, \ 2039 "Print diagnostic message when GC is stalled" \ 2040 "by JNI critical section") \ 2041 \ 2042 /* JVMTI heap profiling */ \ 2043 \ 2044 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2045 "Trace JVMTI object tagging calls") \ 2046 \ 2047 diagnostic(bool, VerifyBeforeIteration, false, \ 2048 "Verify memory system before JVMTI iteration") \ 2049 \ 2050 /* compiler interface */ \ 2051 \ 2052 develop(bool, CIPrintCompilerName, false, \ 2053 "when CIPrint is active, print the name of the active compiler") \ 2054 \ 2055 develop(bool, CIPrintCompileQueue, false, \ 2056 "display the contents of the compile queue whenever a " \ 2057 "compilation is enqueued") \ 2058 \ 2059 develop(bool, CIPrintRequests, false, \ 2060 "display every request for compilation") \ 2061 \ 2062 product(bool, CITime, false, \ 2063 "collect timing information for compilation") \ 2064 \ 2065 develop(bool, CITimeEach, false, \ 2066 "display timing information after each successful compilation") \ 2067 \ 2068 develop(bool, CICountOSR, true, \ 2069 "use a separate counter when assigning ids to osr compilations") \ 2070 \ 2071 develop(bool, CICompileNatives, true, \ 2072 "compile native methods if supported by the compiler") \ 2073 \ 2074 develop_pd(bool, CICompileOSR, \ 2075 "compile on stack replacement methods if supported by the " \ 2076 "compiler") \ 2077 \ 2078 develop(bool, CIPrintMethodCodes, false, \ 2079 "print method bytecodes of the compiled code") \ 2080 \ 2081 develop(bool, CIPrintTypeFlow, false, \ 2082 "print the results of ciTypeFlow analysis") \ 2083 \ 2084 develop(bool, CITraceTypeFlow, false, \ 2085 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2086 \ 2087 develop(intx, CICloneLoopTestLimit, 100, \ 2088 "size limit for blocks heuristically cloned in ciTypeFlow") \ 2089 \ 2090 /* temp diagnostics */ \ 2091 \ 2092 diagnostic(bool, TraceRedundantCompiles, false, \ 2093 "Have compile broker print when a request already in the queue is"\ 2094 " requested again") \ 2095 \ 2096 diagnostic(bool, InitialCompileFast, false, \ 2097 "Initial compile at CompLevel_fast_compile") \ 2098 \ 2099 diagnostic(bool, InitialCompileReallyFast, false, \ 2100 "Initial compile at CompLevel_really_fast_compile (no profile)") \ 2101 \ 2102 diagnostic(bool, FullProfileOnReInterpret, true, \ 2103 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 2104 \ 2105 /* compiler */ \ 2106 \ 2107 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2108 "Number of compiler threads to run") \ 2109 \ 2110 product(intx, CompilationPolicyChoice, 0, \ 2111 "which compilation policy (0/1)") \ 2112 \ 2113 develop(bool, UseStackBanging, true, \ 2114 "use stack banging for stack overflow checks (required for " \ 2115 "proper StackOverflow handling; disable only to measure cost " \ 2116 "of stackbanging)") \ 2117 \ 2118 develop(bool, Use24BitFPMode, true, \ 2119 "Set 24-bit FPU mode on a per-compile basis ") \ 2120 \ 2121 develop(bool, Use24BitFP, true, \ 2122 "use FP instructions that produce 24-bit precise results") \ 2123 \ 2124 develop(bool, UseStrictFP, true, \ 2125 "use strict fp if modifier strictfp is set") \ 2126 \ 2127 develop(bool, GenerateSynchronizationCode, true, \ 2128 "generate locking/unlocking code for synchronized methods and " \ 2129 "monitors") \ 2130 \ 2131 develop(bool, GenerateCompilerNullChecks, true, \ 2132 "Generate explicit null checks for loads/stores/calls") \ 2133 \ 2134 develop(bool, GenerateRangeChecks, true, \ 2135 "Generate range checks for array accesses") \ 2136 \ 2137 develop_pd(bool, ImplicitNullChecks, \ 2138 "generate code for implicit null checks") \ 2139 \ 2140 product(bool, PrintSafepointStatistics, false, \ 2141 "print statistics about safepoint synchronization") \ 2142 \ 2143 product(intx, PrintSafepointStatisticsCount, 300, \ 2144 "total number of safepoint statistics collected " \ 2145 "before printing them out") \ 2146 \ 2147 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2148 "print safepoint statistics only when safepoint takes" \ 2149 " more than PrintSafepointSatisticsTimeout in millis") \ 2150 \ 2151 develop(bool, InlineAccessors, true, \ 2152 "inline accessor methods (get/set)") \ 2153 \ 2154 product(bool, Inline, true, \ 2155 "enable inlining") \ 2156 \ 2157 product(bool, ClipInlining, true, \ 2158 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2159 \ 2160 develop(bool, UseCHA, true, \ 2161 "enable CHA") \ 2162 \ 2163 product(bool, UseTypeProfile, true, \ 2164 "Check interpreter profile for historically monomorphic calls") \ 2165 \ 2166 product(intx, TypeProfileMajorReceiverPercent, 90, \ 2167 "% of major receiver type to all profiled receivers") \ 2168 \ 2169 notproduct(bool, TimeCompiler, false, \ 2170 "time the compiler") \ 2171 \ 2172 notproduct(bool, TimeCompiler2, false, \ 2173 "detailed time the compiler (requires +TimeCompiler)") \ 2174 \ 2175 diagnostic(bool, PrintInlining, false, \ 2176 "prints inlining optimizations") \ 2177 \ 2178 diagnostic(bool, PrintIntrinsics, false, \ 2179 "prints attempted and successful inlining of intrinsics") \ 2180 \ 2181 product(bool, UsePopCountInstruction, false, \ 2182 "Use population count instruction") \ 2183 \ 2184 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2185 "do not expand intrinsics whose (internal) names appear here") \ 2186 \ 2187 develop(bool, StressReflectiveCode, false, \ 2188 "Use inexact types at allocations, etc., to test reflection") \ 2189 \ 2190 develop(bool, EagerInitialization, false, \ 2191 "Eagerly initialize classes if possible") \ 2192 \ 2193 product(bool, Tier1UpdateMethodData, trueInTiered, \ 2194 "Update methodDataOops in Tier1-generated code") \ 2195 \ 2196 develop(bool, TraceMethodReplacement, false, \ 2197 "Print when methods are replaced do to recompilation") \ 2198 \ 2199 develop(bool, PrintMethodFlushing, false, \ 2200 "print the nmethods being flushed") \ 2201 \ 2202 notproduct(bool, LogMultipleMutexLocking, false, \ 2203 "log locking and unlocking of mutexes (only if multiple locks " \ 2204 "are held)") \ 2205 \ 2206 develop(bool, UseRelocIndex, false, \ 2207 "use an index to speed random access to relocations") \ 2208 \ 2209 develop(bool, StressCodeBuffers, false, \ 2210 "Exercise code buffer expansion and other rare state changes") \ 2211 \ 2212 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2213 "Generate extra debugging info for non-safepoints in nmethods") \ 2214 \ 2215 diagnostic(bool, DebugInlinedCalls, true, \ 2216 "If false, restricts profiled locations to the root method only") \ 2217 \ 2218 product(bool, PrintVMOptions, trueInDebug, \ 2219 "print VM flag settings") \ 2220 \ 2221 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2222 "Ignore unrecognized VM options") \ 2223 \ 2224 diagnostic(bool, SerializeVMOutput, true, \ 2225 "Use a mutex to serialize output to tty and hotspot.log") \ 2226 \ 2227 diagnostic(bool, DisplayVMOutput, true, \ 2228 "Display all VM output on the tty, independently of LogVMOutput") \ 2229 \ 2230 diagnostic(bool, LogVMOutput, trueInDebug, \ 2231 "Save VM output to hotspot.log, or to LogFile") \ 2232 \ 2233 diagnostic(ccstr, LogFile, NULL, \ 2234 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2235 \ 2236 product(ccstr, ErrorFile, NULL, \ 2237 "If an error occurs, save the error data to this file " \ 2238 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2239 \ 2240 product(bool, DisplayVMOutputToStderr, false, \ 2241 "If DisplayVMOutput is true, display all VM output to stderr") \ 2242 \ 2243 product(bool, DisplayVMOutputToStdout, false, \ 2244 "If DisplayVMOutput is true, display all VM output to stdout") \ 2245 \ 2246 product(bool, UseHeavyMonitors, false, \ 2247 "use heavyweight instead of lightweight Java monitors") \ 2248 \ 2249 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2250 "print histogram of the symbol table") \ 2251 \ 2252 notproduct(bool, ExitVMOnVerifyError, false, \ 2253 "standard exit from VM if bytecode verify error " \ 2254 "(only in debug mode)") \ 2255 \ 2256 notproduct(ccstr, AbortVMOnException, NULL, \ 2257 "Call fatal if this exception is thrown. Example: " \ 2258 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2259 \ 2260 develop(bool, DebugVtables, false, \ 2261 "add debugging code to vtable dispatch") \ 2262 \ 2263 develop(bool, PrintVtables, false, \ 2264 "print vtables when printing klass") \ 2265 \ 2266 notproduct(bool, PrintVtableStats, false, \ 2267 "print vtables stats at end of run") \ 2268 \ 2269 develop(bool, TraceCreateZombies, false, \ 2270 "trace creation of zombie nmethods") \ 2271 \ 2272 notproduct(bool, IgnoreLockingAssertions, false, \ 2273 "disable locking assertions (for speed)") \ 2274 \ 2275 notproduct(bool, VerifyLoopOptimizations, false, \ 2276 "verify major loop optimizations") \ 2277 \ 2278 product(bool, RangeCheckElimination, true, \ 2279 "Split loop iterations to eliminate range checks") \ 2280 \ 2281 develop_pd(bool, UncommonNullCast, \ 2282 "track occurrences of null in casts; adjust compiler tactics") \ 2283 \ 2284 develop(bool, TypeProfileCasts, true, \ 2285 "treat casts like calls for purposes of type profiling") \ 2286 \ 2287 develop(bool, MonomorphicArrayCheck, true, \ 2288 "Uncommon-trap array store checks that require full type check") \ 2289 \ 2290 develop(bool, DelayCompilationDuringStartup, true, \ 2291 "Delay invoking the compiler until main application class is " \ 2292 "loaded") \ 2293 \ 2294 develop(bool, CompileTheWorld, false, \ 2295 "Compile all methods in all classes in bootstrap class path " \ 2296 "(stress test)") \ 2297 \ 2298 develop(bool, CompileTheWorldPreloadClasses, true, \ 2299 "Preload all classes used by a class before start loading") \ 2300 \ 2301 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ 2302 "Compile all methods although class initializer failed") \ 2303 \ 2304 develop(bool, TraceIterativeGVN, false, \ 2305 "Print progress during Iterative Global Value Numbering") \ 2306 \ 2307 develop(bool, FillDelaySlots, true, \ 2308 "Fill delay slots (on SPARC only)") \ 2309 \ 2310 develop(bool, VerifyIterativeGVN, false, \ 2311 "Verify Def-Use modifications during sparse Iterative Global " \ 2312 "Value Numbering") \ 2313 \ 2314 notproduct(bool, TracePhaseCCP, false, \ 2315 "Print progress during Conditional Constant Propagation") \ 2316 \ 2317 develop(bool, TimeLivenessAnalysis, false, \ 2318 "Time computation of bytecode liveness analysis") \ 2319 \ 2320 develop(bool, TraceLivenessGen, false, \ 2321 "Trace the generation of liveness analysis information") \ 2322 \ 2323 notproduct(bool, TraceLivenessQuery, false, \ 2324 "Trace queries of liveness analysis information") \ 2325 \ 2326 notproduct(bool, CollectIndexSetStatistics, false, \ 2327 "Collect information about IndexSets") \ 2328 \ 2329 develop(bool, PrintDominators, false, \ 2330 "Print out dominator trees for GVN") \ 2331 \ 2332 develop(bool, UseLoopSafepoints, true, \ 2333 "Generate Safepoint nodes in every loop") \ 2334 \ 2335 notproduct(bool, TraceCISCSpill, false, \ 2336 "Trace allocators use of cisc spillable instructions") \ 2337 \ 2338 notproduct(bool, TraceSpilling, false, \ 2339 "Trace spilling") \ 2340 \ 2341 develop(bool, DeutschShiffmanExceptions, true, \ 2342 "Fast check to find exception handler for precisely typed " \ 2343 "exceptions") \ 2344 \ 2345 product(bool, SplitIfBlocks, true, \ 2346 "Clone compares and control flow through merge points to fold " \ 2347 "some branches") \ 2348 \ 2349 develop(intx, FastAllocateSizeLimit, 128*K, \ 2350 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2351 "Inline allocations larger than this in doublewords must go slow")\ 2352 \ 2353 product(bool, AggressiveOpts, false, \ 2354 "Enable aggressive optimizations - see arguments.cpp") \ 2355 \ 2356 product(bool, UseStringCache, false, \ 2357 "Enable String cache capabilities on String.java") \ 2358 \ 2359 /* statistics */ \ 2360 develop(bool, UseVTune, false, \ 2361 "enable support for Intel's VTune profiler") \ 2362 \ 2363 develop(bool, CountCompiledCalls, false, \ 2364 "counts method invocations") \ 2365 \ 2366 notproduct(bool, CountRuntimeCalls, false, \ 2367 "counts VM runtime calls") \ 2368 \ 2369 develop(bool, CountJNICalls, false, \ 2370 "counts jni method invocations") \ 2371 \ 2372 notproduct(bool, CountJVMCalls, false, \ 2373 "counts jvm method invocations") \ 2374 \ 2375 notproduct(bool, CountRemovableExceptions, false, \ 2376 "count exceptions that could be replaced by branches due to " \ 2377 "inlining") \ 2378 \ 2379 notproduct(bool, ICMissHistogram, false, \ 2380 "produce histogram of IC misses") \ 2381 \ 2382 notproduct(bool, PrintClassStatistics, false, \ 2383 "prints class statistics at end of run") \ 2384 \ 2385 notproduct(bool, PrintMethodStatistics, false, \ 2386 "prints method statistics at end of run") \ 2387 \ 2388 /* interpreter */ \ 2389 develop(bool, ClearInterpreterLocals, false, \ 2390 "Always clear local variables of interpreter activations upon " \ 2391 "entry") \ 2392 \ 2393 product_pd(bool, RewriteBytecodes, \ 2394 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2395 \ 2396 product_pd(bool, RewriteFrequentPairs, \ 2397 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2398 \ 2399 diagnostic(bool, PrintInterpreter, false, \ 2400 "Prints the generated interpreter code") \ 2401 \ 2402 product(bool, UseInterpreter, true, \ 2403 "Use interpreter for non-compiled methods") \ 2404 \ 2405 develop(bool, UseFastSignatureHandlers, true, \ 2406 "Use fast signature handlers for native calls") \ 2407 \ 2408 develop(bool, UseV8InstrsOnly, false, \ 2409 "Use SPARC-V8 Compliant instruction subset") \ 2410 \ 2411 product(bool, UseNiagaraInstrs, false, \ 2412 "Use Niagara-efficient instruction subset") \ 2413 \ 2414 develop(bool, UseCASForSwap, false, \ 2415 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2416 \ 2417 product(bool, UseLoopCounter, true, \ 2418 "Increment invocation counter on backward branch") \ 2419 \ 2420 product(bool, UseFastEmptyMethods, true, \ 2421 "Use fast method entry code for empty methods") \ 2422 \ 2423 product(bool, UseFastAccessorMethods, true, \ 2424 "Use fast method entry code for accessor methods") \ 2425 \ 2426 product_pd(bool, UseOnStackReplacement, \ 2427 "Use on stack replacement, calls runtime if invoc. counter " \ 2428 "overflows in loop") \ 2429 \ 2430 notproduct(bool, TraceOnStackReplacement, false, \ 2431 "Trace on stack replacement") \ 2432 \ 2433 develop(bool, PoisonOSREntry, true, \ 2434 "Detect abnormal calls to OSR code") \ 2435 \ 2436 product_pd(bool, PreferInterpreterNativeStubs, \ 2437 "Use always interpreter stubs for native methods invoked via " \ 2438 "interpreter") \ 2439 \ 2440 develop(bool, CountBytecodes, false, \ 2441 "Count number of bytecodes executed") \ 2442 \ 2443 develop(bool, PrintBytecodeHistogram, false, \ 2444 "Print histogram of the executed bytecodes") \ 2445 \ 2446 develop(bool, PrintBytecodePairHistogram, false, \ 2447 "Print histogram of the executed bytecode pairs") \ 2448 \ 2449 diagnostic(bool, PrintSignatureHandlers, false, \ 2450 "Print code generated for native method signature handlers") \ 2451 \ 2452 develop(bool, VerifyOops, false, \ 2453 "Do plausibility checks for oops") \ 2454 \ 2455 develop(bool, CheckUnhandledOops, false, \ 2456 "Check for unhandled oops in VM code") \ 2457 \ 2458 develop(bool, VerifyJNIFields, trueInDebug, \ 2459 "Verify jfieldIDs for instance fields") \ 2460 \ 2461 notproduct(bool, VerifyJNIEnvThread, false, \ 2462 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2463 "from JNI") \ 2464 \ 2465 develop(bool, VerifyFPU, false, \ 2466 "Verify FPU state (check for NaN's, etc.)") \ 2467 \ 2468 develop(bool, VerifyThread, false, \ 2469 "Watch the thread register for corruption (SPARC only)") \ 2470 \ 2471 develop(bool, VerifyActivationFrameSize, false, \ 2472 "Verify that activation frame didn't become smaller than its " \ 2473 "minimal size") \ 2474 \ 2475 develop(bool, TraceFrequencyInlining, false, \ 2476 "Trace frequency based inlining") \ 2477 \ 2478 notproduct(bool, TraceTypeProfile, false, \ 2479 "Trace type profile") \ 2480 \ 2481 develop_pd(bool, InlineIntrinsics, \ 2482 "Inline intrinsics that can be statically resolved") \ 2483 \ 2484 product_pd(bool, ProfileInterpreter, \ 2485 "Profile at the bytecode level during interpretation") \ 2486 \ 2487 develop_pd(bool, ProfileTraps, \ 2488 "Profile deoptimization traps at the bytecode level") \ 2489 \ 2490 product(intx, ProfileMaturityPercentage, 20, \ 2491 "number of method invocations/branches (expressed as % of " \ 2492 "CompileThreshold) before using the method's profile") \ 2493 \ 2494 develop(bool, PrintMethodData, false, \ 2495 "Print the results of +ProfileInterpreter at end of run") \ 2496 \ 2497 develop(bool, VerifyDataPointer, trueInDebug, \ 2498 "Verify the method data pointer during interpreter profiling") \ 2499 \ 2500 develop(bool, VerifyCompiledCode, false, \ 2501 "Include miscellaneous runtime verifications in nmethod code; " \ 2502 "off by default because it disturbs nmethod size heuristics.") \ 2503 \ 2504 \ 2505 /* compilation */ \ 2506 product(bool, UseCompiler, true, \ 2507 "use compilation") \ 2508 \ 2509 develop(bool, TraceCompilationPolicy, false, \ 2510 "Trace compilation policy") \ 2511 \ 2512 develop(bool, TimeCompilationPolicy, false, \ 2513 "Time the compilation policy") \ 2514 \ 2515 product(bool, UseCounterDecay, true, \ 2516 "adjust recompilation counters") \ 2517 \ 2518 develop(intx, CounterHalfLifeTime, 30, \ 2519 "half-life time of invocation counters (in secs)") \ 2520 \ 2521 develop(intx, CounterDecayMinIntervalLength, 500, \ 2522 "Min. ms. between invocation of CounterDecay") \ 2523 \ 2524 product(bool, AlwaysCompileLoopMethods, false, \ 2525 "when using recompilation, never interpret methods " \ 2526 "containing loops") \ 2527 \ 2528 product(bool, DontCompileHugeMethods, true, \ 2529 "don't compile methods > HugeMethodLimit") \ 2530 \ 2531 /* Bytecode escape analysis estimation. */ \ 2532 product(bool, EstimateArgEscape, true, \ 2533 "Analyze bytecodes to estimate escape state of arguments") \ 2534 \ 2535 product(intx, BCEATraceLevel, 0, \ 2536 "How much tracing to do of bytecode escape analysis estimates") \ 2537 \ 2538 product(intx, MaxBCEAEstimateLevel, 5, \ 2539 "Maximum number of nested calls that are analyzed by BC EA.") \ 2540 \ 2541 product(intx, MaxBCEAEstimateSize, 150, \ 2542 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2543 \ 2544 product(intx, AllocatePrefetchStyle, 1, \ 2545 "0 = no prefetch, " \ 2546 "1 = prefetch instructions for each allocation, " \ 2547 "2 = use TLAB watermark to gate allocation prefetch") \ 2548 \ 2549 product(intx, AllocatePrefetchDistance, -1, \ 2550 "Distance to prefetch ahead of allocation pointer") \ 2551 \ 2552 product(intx, AllocatePrefetchLines, 1, \ 2553 "Number of lines to prefetch ahead of allocation pointer") \ 2554 \ 2555 product(intx, AllocatePrefetchStepSize, 16, \ 2556 "Step size in bytes of sequential prefetch instructions") \ 2557 \ 2558 product(intx, AllocatePrefetchInstr, 0, \ 2559 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2560 \ 2561 product(intx, ReadPrefetchInstr, 0, \ 2562 "Prefetch instruction to prefetch ahead") \ 2563 \ 2564 /* deoptimization */ \ 2565 develop(bool, TraceDeoptimization, false, \ 2566 "Trace deoptimization") \ 2567 \ 2568 develop(bool, DebugDeoptimization, false, \ 2569 "Tracing various information while debugging deoptimization") \ 2570 \ 2571 product(intx, SelfDestructTimer, 0, \ 2572 "Will cause VM to terminate after a given time (in minutes) " \ 2573 "(0 means off)") \ 2574 \ 2575 product(intx, MaxJavaStackTraceDepth, 1024, \ 2576 "Max. no. of lines in the stack trace for Java exceptions " \ 2577 "(0 means all)") \ 2578 \ 2579 develop(intx, GuaranteedSafepointInterval, 1000, \ 2580 "Guarantee a safepoint (at least) every so many milliseconds " \ 2581 "(0 means none)") \ 2582 \ 2583 product(intx, SafepointTimeoutDelay, 10000, \ 2584 "Delay in milliseconds for option SafepointTimeout") \ 2585 \ 2586 product(intx, NmethodSweepFraction, 4, \ 2587 "Number of invocations of sweeper to cover all nmethods") \ 2588 \ 2589 notproduct(intx, MemProfilingInterval, 500, \ 2590 "Time between each invocation of the MemProfiler") \ 2591 \ 2592 develop(intx, MallocCatchPtr, -1, \ 2593 "Hit breakpoint when mallocing/freeing this pointer") \ 2594 \ 2595 notproduct(intx, AssertRepeat, 1, \ 2596 "number of times to evaluate expression in assert " \ 2597 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2598 \ 2599 notproduct(ccstrlist, SuppressErrorAt, "", \ 2600 "List of assertions (file:line) to muzzle") \ 2601 \ 2602 notproduct(uintx, HandleAllocationLimit, 1024, \ 2603 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2604 "is used") \ 2605 \ 2606 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2607 "Threshold for total handle allocation when " \ 2608 "+TraceHandleAllocation is used") \ 2609 \ 2610 develop(intx, StackPrintLimit, 100, \ 2611 "number of stack frames to print in VM-level stack dump") \ 2612 \ 2613 notproduct(intx, MaxElementPrintSize, 256, \ 2614 "maximum number of elements to print") \ 2615 \ 2616 notproduct(intx, MaxSubklassPrintSize, 4, \ 2617 "maximum number of subklasses to print when printing klass") \ 2618 \ 2619 develop(intx, MaxInlineLevel, 9, \ 2620 "maximum number of nested calls that are inlined") \ 2621 \ 2622 develop(intx, MaxRecursiveInlineLevel, 1, \ 2623 "maximum number of nested recursive calls that are inlined") \ 2624 \ 2625 product(intx, InlineSmallCode, 1000, \ 2626 "Only inline already compiled methods if their code size is " \ 2627 "less than this") \ 2628 \ 2629 product(intx, MaxInlineSize, 35, \ 2630 "maximum bytecode size of a method to be inlined") \ 2631 \ 2632 product_pd(intx, FreqInlineSize, \ 2633 "maximum bytecode size of a frequent method to be inlined") \ 2634 \ 2635 develop(intx, MaxTrivialSize, 6, \ 2636 "maximum bytecode size of a trivial method to be inlined") \ 2637 \ 2638 develop(intx, MinInliningThreshold, 250, \ 2639 "min. invocation count a method needs to have to be inlined") \ 2640 \ 2641 develop(intx, AlignEntryCode, 4, \ 2642 "aligns entry code to specified value (in bytes)") \ 2643 \ 2644 develop(intx, MethodHistogramCutoff, 100, \ 2645 "cutoff value for method invoc. histogram (+CountCalls)") \ 2646 \ 2647 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2648 "# of interpreted methods to show in profile") \ 2649 \ 2650 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2651 "# of compiled methods to show in profile") \ 2652 \ 2653 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2654 "# of stub methods to show in profile") \ 2655 \ 2656 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2657 "# of runtime stub nodes to show in profile") \ 2658 \ 2659 product(intx, ProfileIntervalsTicks, 100, \ 2660 "# of ticks between printing of interval profile " \ 2661 "(+ProfileIntervals)") \ 2662 \ 2663 notproduct(intx, ScavengeALotInterval, 1, \ 2664 "Interval between which scavenge will occur with +ScavengeALot") \ 2665 \ 2666 notproduct(intx, FullGCALotInterval, 1, \ 2667 "Interval between which full gc will occur with +FullGCALot") \ 2668 \ 2669 notproduct(intx, FullGCALotStart, 0, \ 2670 "For which invocation to start FullGCAlot") \ 2671 \ 2672 notproduct(intx, FullGCALotDummies, 32*K, \ 2673 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2674 "to move") \ 2675 \ 2676 develop(intx, DontYieldALotInterval, 10, \ 2677 "Interval between which yields will be dropped (milliseconds)") \ 2678 \ 2679 develop(intx, MinSleepInterval, 1, \ 2680 "Minimum sleep() interval (milliseconds) when " \ 2681 "ConvertSleepToYield is off (used for SOLARIS)") \ 2682 \ 2683 product(intx, EventLogLength, 2000, \ 2684 "maximum nof events in event log") \ 2685 \ 2686 develop(intx, ProfilerPCTickThreshold, 15, \ 2687 "Number of ticks in a PC buckets to be a hotspot") \ 2688 \ 2689 notproduct(intx, DeoptimizeALotInterval, 5, \ 2690 "Number of exits until DeoptimizeALot kicks in") \ 2691 \ 2692 notproduct(intx, ZombieALotInterval, 5, \ 2693 "Number of exits until ZombieALot kicks in") \ 2694 \ 2695 develop(bool, StressNonEntrant, false, \ 2696 "Mark nmethods non-entrant at registration") \ 2697 \ 2698 diagnostic(intx, MallocVerifyInterval, 0, \ 2699 "if non-zero, verify C heap after every N calls to " \ 2700 "malloc/realloc/free") \ 2701 \ 2702 diagnostic(intx, MallocVerifyStart, 0, \ 2703 "if non-zero, start verifying C heap after Nth call to " \ 2704 "malloc/realloc/free") \ 2705 \ 2706 product(intx, TypeProfileWidth, 2, \ 2707 "number of receiver types to record in call/cast profile") \ 2708 \ 2709 develop(intx, BciProfileWidth, 2, \ 2710 "number of return bci's to record in ret profile") \ 2711 \ 2712 product(intx, PerMethodRecompilationCutoff, 400, \ 2713 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2714 \ 2715 product(intx, PerBytecodeRecompilationCutoff, 100, \ 2716 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2717 \ 2718 product(intx, PerMethodTrapLimit, 100, \ 2719 "Limit on traps (of one kind) in a method (includes inlines)") \ 2720 \ 2721 product(intx, PerBytecodeTrapLimit, 4, \ 2722 "Limit on traps (of one kind) at a particular BCI") \ 2723 \ 2724 develop(intx, FreqCountInvocations, 1, \ 2725 "Scaling factor for branch frequencies (deprecated)") \ 2726 \ 2727 develop(intx, InlineFrequencyRatio, 20, \ 2728 "Ratio of call site execution to caller method invocation") \ 2729 \ 2730 develop_pd(intx, InlineFrequencyCount, \ 2731 "Count of call site execution necessary to trigger frequent " \ 2732 "inlining") \ 2733 \ 2734 develop(intx, InlineThrowCount, 50, \ 2735 "Force inlining of interpreted methods that throw this often") \ 2736 \ 2737 develop(intx, InlineThrowMaxSize, 200, \ 2738 "Force inlining of throwing methods smaller than this") \ 2739 \ 2740 product(intx, AliasLevel, 3, \ 2741 "0 for no aliasing, 1 for oop/field/static/array split, " \ 2742 "2 for class split, 3 for unique instances") \ 2743 \ 2744 develop(bool, VerifyAliases, false, \ 2745 "perform extra checks on the results of alias analysis") \ 2746 \ 2747 develop(intx, ProfilerNodeSize, 1024, \ 2748 "Size in K to allocate for the Profile Nodes of each thread") \ 2749 \ 2750 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 2751 "Number of times to spin wait on a v8 atomic operation lock") \ 2752 \ 2753 product(intx, ReadSpinIterations, 100, \ 2754 "Number of read attempts before a yield (spin inner loop)") \ 2755 \ 2756 product_pd(intx, PreInflateSpin, \ 2757 "Number of times to spin wait before inflation") \ 2758 \ 2759 product(intx, PreBlockSpin, 10, \ 2760 "Number of times to spin in an inflated lock before going to " \ 2761 "an OS lock") \ 2762 \ 2763 /* gc parameters */ \ 2764 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \ 2765 "Default maximum size for object heap (in bytes)") \ 2766 \ 2767 product_pd(uintx, NewSize, \ 2768 "Default size of new generation (in bytes)") \ 2769 \ 2770 product(uintx, MaxNewSize, max_uintx, \ 2771 "Maximum size of new generation (in bytes)") \ 2772 \ 2773 product(uintx, PretenureSizeThreshold, 0, \ 2774 "Max size in bytes of objects allocated in DefNew generation") \ 2775 \ 2776 product_pd(uintx, TLABSize, \ 2777 "Default (or starting) size of TLAB (in bytes)") \ 2778 \ 2779 product(uintx, MinTLABSize, 2*K, \ 2780 "Minimum allowed TLAB size (in bytes)") \ 2781 \ 2782 product(uintx, TLABAllocationWeight, 35, \ 2783 "Allocation averaging weight") \ 2784 \ 2785 product(uintx, TLABWasteTargetPercent, 1, \ 2786 "Percentage of Eden that can be wasted") \ 2787 \ 2788 product(uintx, TLABRefillWasteFraction, 64, \ 2789 "Max TLAB waste at a refill (internal fragmentation)") \ 2790 \ 2791 product(uintx, TLABWasteIncrement, 4, \ 2792 "Increment allowed waste at slow allocation") \ 2793 \ 2794 product_pd(intx, SurvivorRatio, \ 2795 "Ratio of eden/survivor space size") \ 2796 \ 2797 product_pd(intx, NewRatio, \ 2798 "Ratio of new/old generation sizes") \ 2799 \ 2800 product(uintx, MaxLiveObjectEvacuationRatio, 100, \ 2801 "Max percent of eden objects that will be live at scavenge") \ 2802 \ 2803 product_pd(uintx, NewSizeThreadIncrease, \ 2804 "Additional size added to desired new generation size per " \ 2805 "non-daemon thread (in bytes)") \ 2806 \ 2807 product(uintx, OldSize, ScaleForWordSize(4096*K), \ 2808 "Default size of tenured generation (in bytes)") \ 2809 \ 2810 product_pd(uintx, PermSize, \ 2811 "Default size of permanent generation (in bytes)") \ 2812 \ 2813 product_pd(uintx, MaxPermSize, \ 2814 "Maximum size of permanent generation (in bytes)") \ 2815 \ 2816 product(uintx, MinHeapFreeRatio, 40, \ 2817 "Min percentage of heap free after GC to avoid expansion") \ 2818 \ 2819 product(uintx, MaxHeapFreeRatio, 70, \ 2820 "Max percentage of heap free after GC to avoid shrinking") \ 2821 \ 2822 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 2823 "Number of milliseconds per MB of free space in the heap") \ 2824 \ 2825 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 2826 "Min change in heap space due to GC (in bytes)") \ 2827 \ 2828 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 2829 "Min expansion of permanent heap (in bytes)") \ 2830 \ 2831 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 2832 "Max expansion of permanent heap without full GC (in bytes)") \ 2833 \ 2834 product(intx, QueuedAllocationWarningCount, 0, \ 2835 "Number of times an allocation that queues behind a GC " \ 2836 "will retry before printing a warning") \ 2837 \ 2838 diagnostic(uintx, VerifyGCStartAt, 0, \ 2839 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 2840 \ 2841 diagnostic(intx, VerifyGCLevel, 0, \ 2842 "Generation level at which to start +VerifyBefore/AfterGC") \ 2843 \ 2844 develop(uintx, ExitAfterGCNum, 0, \ 2845 "If non-zero, exit after this GC.") \ 2846 \ 2847 product(intx, MaxTenuringThreshold, 15, \ 2848 "Maximum value for tenuring threshold") \ 2849 \ 2850 product(intx, InitialTenuringThreshold, 7, \ 2851 "Initial value for tenuring threshold") \ 2852 \ 2853 product(intx, TargetSurvivorRatio, 50, \ 2854 "Desired percentage of survivor space used after scavenge") \ 2855 \ 2856 product(uintx, MarkSweepDeadRatio, 5, \ 2857 "Percentage (0-100) of the old gen allowed as dead wood." \ 2858 "Serial mark sweep treats this as both the min and max value." \ 2859 "CMS uses this value only if it falls back to mark sweep." \ 2860 "Par compact uses a variable scale based on the density of the" \ 2861 "generation and treats this as the max value when the heap is" \ 2862 "either completely full or completely empty. Par compact also" \ 2863 "has a smaller default value; see arguments.cpp.") \ 2864 \ 2865 product(uintx, PermMarkSweepDeadRatio, 20, \ 2866 "Percentage (0-100) of the perm gen allowed as dead wood." \ 2867 "See MarkSweepDeadRatio for collector-specific comments.") \ 2868 \ 2869 product(intx, MarkSweepAlwaysCompactCount, 4, \ 2870 "How often should we fully compact the heap (ignoring the dead " \ 2871 "space parameters)") \ 2872 \ 2873 product(intx, PrintCMSStatistics, 0, \ 2874 "Statistics for CMS") \ 2875 \ 2876 product(bool, PrintCMSInitiationStatistics, false, \ 2877 "Statistics for initiating a CMS collection") \ 2878 \ 2879 product(intx, PrintFLSStatistics, 0, \ 2880 "Statistics for CMS' FreeListSpace") \ 2881 \ 2882 product(intx, PrintFLSCensus, 0, \ 2883 "Census for CMS' FreeListSpace") \ 2884 \ 2885 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 2886 "Delay in ms between expansion and allocation") \ 2887 \ 2888 product(intx, DeferThrSuspendLoopCount, 4000, \ 2889 "(Unstable) Number of times to iterate in safepoint loop " \ 2890 " before blocking VM threads ") \ 2891 \ 2892 product(intx, DeferPollingPageLoopCount, -1, \ 2893 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 2894 "before changing safepoint polling page to RO ") \ 2895 \ 2896 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 2897 \ 2898 product(bool, UseDepthFirstScavengeOrder, true, \ 2899 "true: the scavenge order will be depth-first, " \ 2900 "false: the scavenge order will be breadth-first") \ 2901 \ 2902 product(bool, PSChunkLargeArrays, true, \ 2903 "true: process large arrays in chunks") \ 2904 \ 2905 product(uintx, GCDrainStackTargetSize, 64, \ 2906 "how many entries we'll try to leave on the stack during " \ 2907 "parallel GC") \ 2908 \ 2909 product(intx, DCQBarrierQueueBufferSize, 256, \ 2910 "Number of elements in a dirty card queue buffer") \ 2911 \ 2912 product(intx, DCQBarrierProcessCompletedThreshold, 5, \ 2913 "Number of completed dirty card buffers to trigger processing.") \ 2914 \ 2915 /* stack parameters */ \ 2916 product_pd(intx, StackYellowPages, \ 2917 "Number of yellow zone (recoverable overflows) pages") \ 2918 \ 2919 product_pd(intx, StackRedPages, \ 2920 "Number of red zone (unrecoverable overflows) pages") \ 2921 \ 2922 product_pd(intx, StackShadowPages, \ 2923 "Number of shadow zone (for overflow checking) pages" \ 2924 " this should exceed the depth of the VM and native call stack") \ 2925 \ 2926 product_pd(intx, ThreadStackSize, \ 2927 "Thread Stack Size (in Kbytes)") \ 2928 \ 2929 product_pd(intx, VMThreadStackSize, \ 2930 "Non-Java Thread Stack Size (in Kbytes)") \ 2931 \ 2932 product_pd(intx, CompilerThreadStackSize, \ 2933 "Compiler Thread Stack Size (in Kbytes)") \ 2934 \ 2935 develop_pd(uintx, JVMInvokeMethodSlack, \ 2936 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 2937 \ 2938 product(uintx, ThreadSafetyMargin, 50*M, \ 2939 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 2940 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 2941 "disable this feature") \ 2942 \ 2943 /* code cache parameters */ \ 2944 develop(uintx, CodeCacheSegmentSize, 64, \ 2945 "Code cache segment size (in bytes) - smallest unit of " \ 2946 "allocation") \ 2947 \ 2948 develop_pd(intx, CodeEntryAlignment, \ 2949 "Code entry alignment for generated code (in bytes)") \ 2950 \ 2951 product_pd(uintx, InitialCodeCacheSize, \ 2952 "Initial code cache size (in bytes)") \ 2953 \ 2954 product_pd(uintx, ReservedCodeCacheSize, \ 2955 "Reserved code cache size (in bytes) - maximum code cache size") \ 2956 \ 2957 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 2958 "When less than X space left, we stop compiling.") \ 2959 \ 2960 product_pd(uintx, CodeCacheExpansionSize, \ 2961 "Code cache expansion size (in bytes)") \ 2962 \ 2963 develop_pd(uintx, CodeCacheMinBlockLength, \ 2964 "Minimum number of segments in a code cache block.") \ 2965 \ 2966 notproduct(bool, ExitOnFullCodeCache, false, \ 2967 "Exit the VM if we fill the code cache.") \ 2968 \ 2969 /* interpreter debugging */ \ 2970 develop(intx, BinarySwitchThreshold, 5, \ 2971 "Minimal number of lookupswitch entries for rewriting to binary " \ 2972 "switch") \ 2973 \ 2974 develop(intx, StopInterpreterAt, 0, \ 2975 "Stops interpreter execution at specified bytecode number") \ 2976 \ 2977 develop(intx, TraceBytecodesAt, 0, \ 2978 "Traces bytecodes starting with specified bytecode number") \ 2979 \ 2980 /* compiler interface */ \ 2981 develop(intx, CIStart, 0, \ 2982 "the id of the first compilation to permit") \ 2983 \ 2984 develop(intx, CIStop, -1, \ 2985 "the id of the last compilation to permit") \ 2986 \ 2987 develop(intx, CIStartOSR, 0, \ 2988 "the id of the first osr compilation to permit " \ 2989 "(CICountOSR must be on)") \ 2990 \ 2991 develop(intx, CIStopOSR, -1, \ 2992 "the id of the last osr compilation to permit " \ 2993 "(CICountOSR must be on)") \ 2994 \ 2995 develop(intx, CIBreakAtOSR, -1, \ 2996 "id of osr compilation to break at") \ 2997 \ 2998 develop(intx, CIBreakAt, -1, \ 2999 "id of compilation to break at") \ 3000 \ 3001 product(ccstrlist, CompileOnly, "", \ 3002 "List of methods (pkg/class.name) to restrict compilation to") \ 3003 \ 3004 product(ccstr, CompileCommandFile, NULL, \ 3005 "Read compiler commands from this file [.hotspot_compiler]") \ 3006 \ 3007 product(ccstrlist, CompileCommand, "", \ 3008 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3009 \ 3010 product(bool, CICompilerCountPerCPU, false, \ 3011 "1 compiler thread for log(N CPUs)") \ 3012 \ 3013 develop(intx, CIFireOOMAt, -1, \ 3014 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3015 "(non-negative value throws OOM after this many CI accesses " \ 3016 "in each compile)") \ 3017 \ 3018 develop(intx, CIFireOOMAtDelay, -1, \ 3019 "Wait for this many CI accesses to occur in all compiles before " \ 3020 "beginning to throw OutOfMemoryErrors in each compile") \ 3021 \ 3022 /* Priorities */ \ 3023 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3024 \ 3025 product(intx, ThreadPriorityPolicy, 0, \ 3026 "0 : Normal. "\ 3027 " VM chooses priorities that are appropriate for normal "\ 3028 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3029 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3030 " map to lower native priority values. On Windows applications"\ 3031 " are allowed to use higher native priorities. However, with "\ 3032 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3033 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3034 " interfere with system threads. On Linux thread priorities "\ 3035 " are ignored because the OS does not support static priority "\ 3036 " in SCHED_OTHER scheduling class which is the only choice for"\ 3037 " non-root, non-realtime applications. "\ 3038 "1 : Aggressive. "\ 3039 " Java thread priorities map over to the entire range of "\ 3040 " native thread priorities. Higher Java thread priorities map "\ 3041 " to higher native thread priorities. This policy should be "\ 3042 " used with care, as sometimes it can cause performance "\ 3043 " degradation in the application and/or the entire system. On "\ 3044 " Linux this policy requires root privilege.") \ 3045 \ 3046 product(bool, ThreadPriorityVerbose, false, \ 3047 "print priority changes") \ 3048 \ 3049 product(intx, DefaultThreadPriority, -1, \ 3050 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ 3051 \ 3052 product(intx, CompilerThreadPriority, -1, \ 3053 "what priority should compiler threads run at (-1 means no change)") \ 3054 \ 3055 product(intx, VMThreadPriority, -1, \ 3056 "what priority should VM threads run at (-1 means no change)") \ 3057 \ 3058 product(bool, CompilerThreadHintNoPreempt, true, \ 3059 "(Solaris only) Give compiler threads an extra quanta") \ 3060 \ 3061 product(bool, VMThreadHintNoPreempt, false, \ 3062 "(Solaris only) Give VM thread an extra quanta") \ 3063 \ 3064 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3065 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3066 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3067 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3068 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3069 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3070 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3071 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3072 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3073 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3074 \ 3075 /* compiler debugging */ \ 3076 notproduct(intx, CompileTheWorldStartAt, 1, \ 3077 "First class to consider when using +CompileTheWorld") \ 3078 \ 3079 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3080 "Last class to consider when using +CompileTheWorld") \ 3081 \ 3082 develop(intx, NewCodeParameter, 0, \ 3083 "Testing Only: Create a dedicated integer parameter before " \ 3084 "putback") \ 3085 \ 3086 /* new oopmap storage allocation */ \ 3087 develop(intx, MinOopMapAllocation, 8, \ 3088 "Minimum number of OopMap entries in an OopMapSet") \ 3089 \ 3090 /* Background Compilation */ \ 3091 develop(intx, LongCompileThreshold, 50, \ 3092 "Used with +TraceLongCompiles") \ 3093 \ 3094 product(intx, StarvationMonitorInterval, 200, \ 3095 "Pause between each check in ms") \ 3096 \ 3097 /* recompilation */ \ 3098 product_pd(intx, CompileThreshold, \ 3099 "number of interpreted method invocations before (re-)compiling") \ 3100 \ 3101 product_pd(intx, BackEdgeThreshold, \ 3102 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3103 \ 3104 product(intx, Tier1BytecodeLimit, 10, \ 3105 "Must have at least this many bytecodes before tier1" \ 3106 "invocation counters are used") \ 3107 \ 3108 product_pd(intx, Tier2CompileThreshold, \ 3109 "threshold at which a tier 2 compilation is invoked") \ 3110 \ 3111 product_pd(intx, Tier2BackEdgeThreshold, \ 3112 "Back edge threshold at which a tier 2 compilation is invoked") \ 3113 \ 3114 product_pd(intx, Tier3CompileThreshold, \ 3115 "threshold at which a tier 3 compilation is invoked") \ 3116 \ 3117 product_pd(intx, Tier3BackEdgeThreshold, \ 3118 "Back edge threshold at which a tier 3 compilation is invoked") \ 3119 \ 3120 product_pd(intx, Tier4CompileThreshold, \ 3121 "threshold at which a tier 4 compilation is invoked") \ 3122 \ 3123 product_pd(intx, Tier4BackEdgeThreshold, \ 3124 "Back edge threshold at which a tier 4 compilation is invoked") \ 3125 \ 3126 product_pd(bool, TieredCompilation, \ 3127 "Enable two-tier compilation") \ 3128 \ 3129 product(bool, StressTieredRuntime, false, \ 3130 "Alternate client and server compiler on compile requests") \ 3131 \ 3132 product_pd(intx, OnStackReplacePercentage, \ 3133 "NON_TIERED number of method invocations/branches (expressed as %"\ 3134 "of CompileThreshold) before (re-)compiling OSR code") \ 3135 \ 3136 product(intx, InterpreterProfilePercentage, 33, \ 3137 "NON_TIERED number of method invocations/branches (expressed as %"\ 3138 "of CompileThreshold) before profiling in the interpreter") \ 3139 \ 3140 develop(intx, MaxRecompilationSearchLength, 10, \ 3141 "max. # frames to inspect searching for recompilee") \ 3142 \ 3143 develop(intx, MaxInterpretedSearchLength, 3, \ 3144 "max. # interp. frames to skip when searching for recompilee") \ 3145 \ 3146 develop(intx, DesiredMethodLimit, 8000, \ 3147 "desired max. method size (in bytecodes) after inlining") \ 3148 \ 3149 develop(intx, HugeMethodLimit, 8000, \ 3150 "don't compile methods larger than this if " \ 3151 "+DontCompileHugeMethods") \ 3152 \ 3153 /* New JDK 1.4 reflection implementation */ \ 3154 \ 3155 develop(bool, UseNewReflection, true, \ 3156 "Temporary flag for transition to reflection based on dynamic " \ 3157 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3158 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3159 "changes were needed") \ 3160 \ 3161 develop(bool, VerifyReflectionBytecodes, false, \ 3162 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3163 "in situations like that described in 4486457 or for " \ 3164 "constructors generated for serialization, so can not be enabled "\ 3165 "in product.") \ 3166 \ 3167 product(bool, ReflectionWrapResolutionErrors, true, \ 3168 "Temporary flag for transition to AbstractMethodError wrapped " \ 3169 "in InvocationTargetException. See 6531596") \ 3170 \ 3171 \ 3172 develop(intx, FastSuperclassLimit, 8, \ 3173 "Depth of hardwired instanceof accelerator array") \ 3174 \ 3175 /* Properties for Java libraries */ \ 3176 \ 3177 product(intx, MaxDirectMemorySize, -1, \ 3178 "Maximum total size of NIO direct-buffer allocations") \ 3179 \ 3180 /* temporary developer defined flags */ \ 3181 \ 3182 diagnostic(bool, UseNewCode, false, \ 3183 "Testing Only: Use the new version while testing") \ 3184 \ 3185 diagnostic(bool, UseNewCode2, false, \ 3186 "Testing Only: Use the new version while testing") \ 3187 \ 3188 diagnostic(bool, UseNewCode3, false, \ 3189 "Testing Only: Use the new version while testing") \ 3190 \ 3191 /* flags for performance data collection */ \ 3192 \ 3193 product(bool, UsePerfData, true, \ 3194 "Flag to disable jvmstat instrumentation for performance testing" \ 3195 "and problem isolation purposes.") \ 3196 \ 3197 product(bool, PerfDataSaveToFile, false, \ 3198 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3199 \ 3200 product(ccstr, PerfDataSaveFile, NULL, \ 3201 "Save PerfData memory to the specified absolute pathname," \ 3202 "%p in the file name if present will be replaced by pid") \ 3203 \ 3204 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3205 "Data sampling interval in milliseconds") \ 3206 \ 3207 develop(bool, PerfTraceDataCreation, false, \ 3208 "Trace creation of Performance Data Entries") \ 3209 \ 3210 develop(bool, PerfTraceMemOps, false, \ 3211 "Trace PerfMemory create/attach/detach calls") \ 3212 \ 3213 product(bool, PerfDisableSharedMem, false, \ 3214 "Store performance data in standard memory") \ 3215 \ 3216 product(intx, PerfDataMemorySize, 32*K, \ 3217 "Size of performance data memory region. Will be rounded " \ 3218 "up to a multiple of the native os page size.") \ 3219 \ 3220 product(intx, PerfMaxStringConstLength, 1024, \ 3221 "Maximum PerfStringConstant string length before truncation") \ 3222 \ 3223 product(bool, PerfAllowAtExitRegistration, false, \ 3224 "Allow registration of atexit() methods") \ 3225 \ 3226 product(bool, PerfBypassFileSystemCheck, false, \ 3227 "Bypass Win32 file system criteria checks (Windows Only)") \ 3228 \ 3229 product(intx, UnguardOnExecutionViolation, 0, \ 3230 "Unguard page and retry on no-execute fault (Win32 only)" \ 3231 "0=off, 1=conservative, 2=aggressive") \ 3232 \ 3233 /* Serviceability Support */ \ 3234 \ 3235 product(bool, ManagementServer, false, \ 3236 "Create JMX Management Server") \ 3237 \ 3238 product(bool, DisableAttachMechanism, false, \ 3239 "Disable mechanism that allows tools to attach to this VM") \ 3240 \ 3241 product(bool, StartAttachListener, false, \ 3242 "Always start Attach Listener at VM startup") \ 3243 \ 3244 manageable(bool, PrintConcurrentLocks, false, \ 3245 "Print java.util.concurrent locks in thread dump") \ 3246 \ 3247 /* Shared spaces */ \ 3248 \ 3249 product(bool, UseSharedSpaces, true, \ 3250 "Use shared spaces in the permanent generation") \ 3251 \ 3252 product(bool, RequireSharedSpaces, false, \ 3253 "Require shared spaces in the permanent generation") \ 3254 \ 3255 product(bool, ForceSharedSpaces, false, \ 3256 "Require shared spaces in the permanent generation") \ 3257 \ 3258 product(bool, DumpSharedSpaces, false, \ 3259 "Special mode: JVM reads a class list, loads classes, builds " \ 3260 "shared spaces, and dumps the shared spaces to a file to be " \ 3261 "used in future JVM runs.") \ 3262 \ 3263 product(bool, PrintSharedSpaces, false, \ 3264 "Print usage of shared spaces") \ 3265 \ 3266 product(uintx, SharedDummyBlockSize, 512*M, \ 3267 "Size of dummy block used to shift heap addresses (in bytes)") \ 3268 \ 3269 product(uintx, SharedReadWriteSize, 12*M, \ 3270 "Size of read-write space in permanent generation (in bytes)") \ 3271 \ 3272 product(uintx, SharedReadOnlySize, 8*M, \ 3273 "Size of read-only space in permanent generation (in bytes)") \ 3274 \ 3275 product(uintx, SharedMiscDataSize, 4*M, \ 3276 "Size of the shared data area adjacent to the heap (in bytes)") \ 3277 \ 3278 product(uintx, SharedMiscCodeSize, 4*M, \ 3279 "Size of the shared code area adjacent to the heap (in bytes)") \ 3280 \ 3281 diagnostic(bool, SharedOptimizeColdStart, true, \ 3282 "At dump time, order shared objects to achieve better " \ 3283 "cold startup time.") \ 3284 \ 3285 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3286 "Reordering policy for SharedOptimizeColdStart " \ 3287 "0=favor classload-time locality, 1=balanced, " \ 3288 "2=favor runtime locality") \ 3289 \ 3290 diagnostic(bool, SharedSkipVerify, false, \ 3291 "Skip assert() and verify() which page-in unwanted shared " \ 3292 "objects. ") \ 3293 \ 3294 product(bool, AnonymousClasses, false, \ 3295 "support sun.misc.Unsafe.defineAnonymousClass") \ 3296 \ 3297 product(bool, TaggedStackInterpreter, false, \ 3298 "Insert tags in interpreter execution stack for oopmap generaion")\ 3299 \ 3300 diagnostic(bool, PauseAtStartup, false, \ 3301 "Causes the VM to pause at startup time and wait for the pause " \ 3302 "file to be removed (default: ./vm.paused.<pid>)") \ 3303 \ 3304 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3305 "The file to create and for whose removal to await when pausing " \ 3306 "at startup. (default: ./vm.paused.<pid>)") \ 3307 \ 3308 product(bool, ExtendedDTraceProbes, false, \ 3309 "Enable performance-impacting dtrace probes") \ 3310 \ 3311 product(bool, DTraceMethodProbes, false, \ 3312 "Enable dtrace probes for method-entry and method-exit") \ 3313 \ 3314 product(bool, DTraceAllocProbes, false, \ 3315 "Enable dtrace probes for object allocation") \ 3316 \ 3317 product(bool, DTraceMonitorProbes, false, \ 3318 "Enable dtrace probes for monitor events") \ 3319 \ 3320 product(bool, RelaxAccessControlCheck, false, \ 3321 "Relax the access control checks in the verifier") \ 3322 \ 3323 diagnostic(bool, PrintDTraceDOF, false, \ 3324 "Print the DTrace DOF passed to the system for JSDT probes") \ 3325 \ 3326 product(bool, UseVMInterruptibleIO, false, \ 3327 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3328 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3329 " of this flag is true for JDK 6 and earliers") 3330 3331 3332/* 3333 * Macros for factoring of globals 3334 */ 3335 3336// Interface macros 3337#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3338#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3339#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3340#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3341#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3342#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3343#ifdef PRODUCT 3344#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3345#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3346#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3347#else 3348#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3349#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3350#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3351#endif 3352// Special LP64 flags, product only needed for now. 3353#ifdef _LP64 3354#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3355#else 3356#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3357#endif // _LP64 3358 3359// Implementation macros 3360#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3361#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3362#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3363#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3364#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3365#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3366#ifdef PRODUCT 3367#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3368#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3369#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3370#else 3371#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3372#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3373#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3374#endif 3375#ifdef _LP64 3376#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3377#else 3378#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3379#endif // _LP64 3380 3381RUNTIME_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) 3382 3383RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3384