globals.hpp revision 164:c436414a719e
180708Sjake/* 281896Sjake * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. 381896Sjake * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 481896Sjake * 580708Sjake * This code is free software; you can redistribute it and/or modify it 680708Sjake * under the terms of the GNU General Public License version 2 only, as 780708Sjake * published by the Free Software Foundation. 881896Sjake * 981896Sjake * This code is distributed in the hope that it will be useful, but WITHOUT 1081896Sjake * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1181896Sjake * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1280708Sjake * version 2 for more details (a copy is included in the LICENSE file that 1380708Sjake * accompanied this code). 1480708Sjake * 1580708Sjake * You should have received a copy of the GNU General Public License version 1680708Sjake * 2 along with this work; if not, write to the Free Software Foundation, 1780708Sjake * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1880708Sjake * 1980708Sjake * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 2081896Sjake * CA 95054 USA or visit www.sun.com if you need additional information or 2181896Sjake * have any questions. 2281896Sjake * 2380708Sjake */ 2481896Sjake 2580708Sjake#if !defined(COMPILER1) && !defined(COMPILER2) 2680708Sjakedefine_pd_global(bool, BackgroundCompilation, false); 2781896Sjakedefine_pd_global(bool, UseTLAB, false); 2880708Sjakedefine_pd_global(bool, CICompileOSR, false); 2980708Sjakedefine_pd_global(bool, UseTypeProfile, false); 3080708Sjakedefine_pd_global(bool, UseOnStackReplacement, false); 3180708Sjakedefine_pd_global(bool, InlineIntrinsics, false); 3280708Sjakedefine_pd_global(bool, PreferInterpreterNativeStubs, true); 3380708Sjakedefine_pd_global(bool, ProfileInterpreter, false); 3480708Sjakedefine_pd_global(bool, ProfileTraps, false); 3580708Sjakedefine_pd_global(bool, TieredCompilation, false); 3681896Sjake 3781896Sjakedefine_pd_global(intx, CompileThreshold, 0); 38191980Smariusdefine_pd_global(intx, Tier2CompileThreshold, 0); 3980708Sjakedefine_pd_global(intx, Tier3CompileThreshold, 0); 4080708Sjakedefine_pd_global(intx, Tier4CompileThreshold, 0); 41191980Smarius 42191980Smariusdefine_pd_global(intx, BackEdgeThreshold, 0); 43191980Smariusdefine_pd_global(intx, Tier2BackEdgeThreshold, 0); 44108700Sjakedefine_pd_global(intx, Tier3BackEdgeThreshold, 0); 45108700Sjakedefine_pd_global(intx, Tier4BackEdgeThreshold, 0); 4680708Sjake 4780708Sjakedefine_pd_global(intx, OnStackReplacePercentage, 0); 4880708Sjakedefine_pd_global(bool, ResizeTLAB, false); 4980708Sjakedefine_pd_global(intx, FreqInlineSize, 0); 50119563Salcdefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 51191980Smariusdefine_pd_global(intx, NewRatio, 4); 52119563Salcdefine_pd_global(intx, InlineClassNatives, true); 53119563Salcdefine_pd_global(intx, InlineUnsafeOps, true); 54191980Smariusdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 55199135Skibdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 56191980Smariusdefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 57269782Skibdefine_pd_global(intx, CodeCacheMinBlockLength, 1); 58108700Sjakedefine_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); 5980709Sjakedefine_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); 6082014Sjakedefine_pd_global(bool, NeverActAsServerClassMachine, true); 6180708Sjakedefine_pd_global(uintx, DefaultMaxRAM, 1*G); 6280709Sjake#define CI_COMPILER_COUNT 0 6380709Sjake#else 6480708Sjake 6580708Sjake#ifdef COMPILER2 6682908Sjake#define CI_COMPILER_COUNT 2 67119563Salc#else 6886523Sjake#define CI_COMPILER_COUNT 1 6986523Sjake#endif // COMPILER2 70109615Sjeff 7191612Sjake#endif // no compilers 72108302Sjake 73108302Sjake 7480708Sjake// string type aliases used only in this file 7586523Sjaketypedef const char* ccstr; 7680709Sjaketypedef const char* ccstrlist; // represents string arguments which accumulate 77112920Sjake 78191980Smariusenum FlagValueOrigin { 7988643Sjake DEFAULT = 0, 8080708Sjake COMMAND_LINE = 1, 8186147Stmm ENVIRON_VAR = 2, 82112306Sjake CONFIG_FILE = 3, 83138129Sdas MANAGEMENT = 4, 84108302Sjake ERGONOMIC = 5, 8582014Sjake ATTACH_ON_DEMAND = 6, 8680708Sjake INTERNAL = 99 87108700Sjake}; 88108700Sjake 89108700Sjakestruct Flag { 90108700Sjake const char *type; 9180708Sjake const char *name; 9283366Sjulian void* addr; 9380708Sjake const char *kind; 9491339Sjake FlagValueOrigin origin; 9588782Sjake 9691339Sjake // points to all Flags static array 9795744Sjake static Flag *flags; 98140485Sjhb 99140485Sjhb // number of flags 10091339Sjake static size_t numFlags; 10188782Sjake 10280708Sjake static Flag* find_flag(char* name, size_t length); 10380708Sjake 10498765Sjake bool is_bool() const { return strcmp(type, "bool") == 0; } 10599072Sjulian bool get_bool() const { return *((bool*) addr); } 10699072Sjulian void set_bool(bool value) { *((bool*) addr) = value; } 107191980Smarius 10899072Sjulian bool is_intx() const { return strcmp(type, "intx") == 0; } 10999072Sjulian intx get_intx() const { return *((intx*) addr); } 11099072Sjulian void set_intx(intx value) { *((intx*) addr) = value; } 111107719Sjulian 112107180Smux bool is_uintx() const { return strcmp(type, "uintx") == 0; } 113191980Smarius uintx get_uintx() const { return *((uintx*) addr); } 114107180Smux void set_uintx(uintx value) { *((uintx*) addr) = value; } 115107180Smux 116107180Smux bool is_double() const { return strcmp(type, "double") == 0; } 117173615Smarcel double get_double() const { return *((double*) addr); } 11899072Sjulian void set_double(double value) { *((double*) addr) = value; } 119112968Sjake 120112968Sjake bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 121127545Skensmith bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 122112968Sjake ccstr get_ccstr() const { return *((ccstr*) addr); } 123135853Skensmith void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 124112968Sjake 125112968Sjake bool is_unlocker() const; 12699072Sjulian bool is_unlocked() const; 12799072Sjulian bool is_writeable() const; 12899072Sjulian bool is_external() const; 129173615Smarcel 130173615Smarcel void print_on(outputStream* st); 131191980Smarius void print_as_flag(outputStream* st); 132173615Smarcel}; 133191980Smarius 134173615Smarcel// debug flags control various aspects of the VM and are global accessible 135119004Smarcel 136119004Smarcel// use FlagSetting to temporarily change some debug flag 137191980Smarius// e.g. FlagSetting fs(DebugThisAndThat, true); 138119004Smarcel// restored to previous value upon leaving scope 139119004Smarcelclass FlagSetting { 140119004Smarcel bool val; 141119004Smarcel bool* flag; 142119004Smarcel public: 143191980Smarius FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 144119004Smarcel ~FlagSetting() { *flag = val; } 145119004Smarcel}; 146119004Smarcel 147199135Skib 148199135Skibclass CounterSetting { 149199135Skib intx* counter; 150199135Skib public: 151199135Skib CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 152199135Skib ~CounterSetting() { (*counter)--; } 153199135Skib}; 154199135Skib 155199135Skib 156199135Skibclass IntFlagSetting { 157199135Skib intx val; 158199135Skib intx* flag; 159199135Skib public: 160199135Skib IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 161199135Skib ~IntFlagSetting() { *flag = val; } 162199135Skib}; 163199135Skib 164199135Skib 165199135Skibclass DoubleFlagSetting { 166199135Skib double val; 167199135Skib double* flag; 168199135Skib public: 169199135Skib DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 170300415Sdchagin ~DoubleFlagSetting() { *flag = val; } 171199135Skib}; 172199135Skib 173199135Skib 174199135Skibclass CommandLineFlags { 175199135Skib public: 176199135Skib static bool boolAt(char* name, size_t len, bool* value); 177301961Skib static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 17899072Sjulian static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 179112921Sjake static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 180112921Sjake 181112968Sjake static bool intxAt(char* name, size_t len, intx* value); 182112921Sjake static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 183115858Smarcel static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 184115858Smarcel static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 185112968Sjake 186112968Sjake static bool uintxAt(char* name, size_t len, uintx* value); 187112921Sjake static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 188112921Sjake static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 189112921Sjake static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 190112921Sjake 191112921Sjake static bool doubleAt(char* name, size_t len, double* value); 192112921Sjake static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 193144637Sjhb static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 194170305Sjeff static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 195144637Sjhb 196144637Sjhb static bool ccstrAt(char* name, size_t len, ccstr* value); 19799072Sjulian static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 19899072Sjulian static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 19999072Sjulian static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 200301961Skib 201211049Smarius // Returns false if name is not a command line flag. 20299072Sjulian static bool wasSetOnCmdline(const char* name, bool* value); 203119622Sjake static void printSetFlags(); 204119622Sjake 205119622Sjake static void printFlags() PRODUCT_RETURN; 206145433Sdavidxu 207145433Sdavidxu static void verify() PRODUCT_RETURN; 208119622Sjake}; 209145433Sdavidxu 210145433Sdavidxu// use this for flags that are true by default in the debug version but 211119622Sjake// false in the optimized version, and vice versa 212145433Sdavidxu#ifdef ASSERT 213119622Sjake#define trueInDebug true 214119622Sjake#define falseInDebug false 215119622Sjake#else 216119622Sjake#define trueInDebug false 21799072Sjulian#define falseInDebug true 21899072Sjulian#endif 219147889Sdavidxu 220145433Sdavidxu// use this for flags that are true per default in the product build 221145433Sdavidxu// but false in development builds, and vice versa 222145433Sdavidxu#ifdef PRODUCT 223145433Sdavidxu#define trueInProduct true 224145433Sdavidxu#define falseInProduct false 225211049Smarius#else 226147889Sdavidxu#define trueInProduct false 227145433Sdavidxu#define falseInProduct true 228145433Sdavidxu#endif 22982908Sjake 23082908Sjake// use this for flags that are true per default in the tiered build 23182908Sjake// but false in non-tiered builds, and vice versa 23282908Sjake#ifdef TIERED 23382908Sjake#define trueInTiered true 23480708Sjake#define falseInTiered false 23590361Sjulian#else 23680708Sjake#define trueInTiered false 23780709Sjake#define falseInTiered true 23882014Sjake#endif 23991612Sjake 24091612Sjake// develop flags are settable / visible only during development and are constant in the PRODUCT version 24191612Sjake// product flags are always settable / visible 24291612Sjake// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 24391612Sjake 24480709Sjake// A flag must be declared with one of the following types: 24590361Sjulian// bool, intx, uintx, ccstr. 24682908Sjake// The type "ccstr" is an alias for "const char*" and is used 24782908Sjake// only in this file, because the macrology requires single-token type names. 24880709Sjake 24980709Sjake// Note: Diagnostic options not meant for VM tuning or for product modes. 25080709Sjake// They are to be used for VM quality assurance or field diagnosis 25195744Sjake// of VM bugs. They are hidden so that users will not be encouraged to 252140485Sjhb// try them as if they were VM ordinary execution options. However, they 25388782Sjake// are available in the product version of the VM. Under instruction 25486147Stmm// from support engineers, VM customers can turn them on to collect 25591612Sjake// diagnostic information about VM problems. To use a VM diagnostic 256127545Skensmith// option, you must first specify +UnlockDiagnosticVMOptions. 257127545Skensmith// (This master switch also affects the behavior of -Xprintflags.) 25891612Sjake 25983366Sjulian// manageable flags are writeable external product flags. 26082908Sjake// They are dynamically writeable through the JDK management interface 26182908Sjake// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 26282908Sjake// These flags are external exported interface (see CCC). The list of 263112920Sjake// manageable flags can be queried programmatically through the management 264112920Sjake// interface. 265112920Sjake// 266112920Sjake// A flag can be made as "manageable" only if 26782014Sjake// - the flag is defined in a CCC as an external exported interface. 26889044Sjake// - the VM implementation supports dynamic setting of the flag. 26982014Sjake// This implies that the VM must *always* query the flag variable 27091612Sjake// and not reuse state related to the flag state at any given time. 27180709Sjake// - you want the flag to be queried programmatically by the customers. 27282908Sjake// 27391612Sjake// product_rw flags are writeable internal product flags. 27491612Sjake// They are like "manageable" flags but for internal/private use. 27591612Sjake// The list of product_rw flags are internal/private flags which 27691612Sjake// may be changed/removed in a future release. It can be set 27791612Sjake// through the management interface to get/set value 27891612Sjake// when the name of flag is supplied. 27991612Sjake// 28091612Sjake// A flag can be made as "product_rw" only if 28191612Sjake// - the VM implementation supports dynamic setting of the flag. 28291612Sjake// This implies that the VM must *always* query the flag variable 28391612Sjake// and not reuse state related to the flag state at any given time. 28491612Sjake// 28591612Sjake// Note that when there is a need to support develop flags to be writeable, 28691612Sjake// it can be done in the same way as product_rw. 28791612Sjake 28891612Sjake#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct, manageable, product_rw, lp64_product) \ 28991612Sjake \ 29091612Sjake lp64_product(bool, UseCompressedOops, false, \ 29191612Sjake "Use 32-bit object references in 64-bit VM. " \ 29291612Sjake "lp64_product means flag is always constant in 32 bit VM") \ 29391612Sjake \ 29491612Sjake lp64_product(bool, CheckCompressedOops, trueInDebug, \ 29591612Sjake "generate checks in encoding/decoding code") \ 29691612Sjake \ 29791612Sjake /* UseMembar is theoretically a temp flag used for memory barrier \ 29891612Sjake * removal testing. It was supposed to be removed before FCS but has \ 29982908Sjake * been re-added (see 6401008) */ \ 30082908Sjake product(bool, UseMembar, false, \ 30182908Sjake "(Unstable) Issues membars on thread state transitions") \ 30282908Sjake \ 30391612Sjake product(bool, PrintCommandLineFlags, false, \ 30483366Sjulian "Prints flags that appeared on the command line") \ 30582908Sjake \ 30682908Sjake diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 30788643Sjake "Enable processing of flags relating to field diagnostics") \ 30888643Sjake \ 30988643Sjake product(bool, JavaMonitorsInStackTrace, true, \ 31082908Sjake "Print info. about Java monitor locks when the stacks are dumped")\ 31183366Sjulian \ 31282014Sjake product_pd(bool, UseLargePages, \ 31394254Sjake "Use large page memory") \ 31494254Sjake \ 31594254Sjake develop(bool, TracePageSizes, false, \ 316127343Stmm "Trace page size selection and usage.") \ 317127343Stmm \ 318112917Sjake product(bool, UseNUMA, false, \ 31991612Sjake "Use NUMA if available") \ 32082908Sjake \ 321170305Sjeff product(intx, NUMAChunkResizeWeight, 20, \ 322144637Sjhb "Percentage (0-100) used to weight the current sample when " \ 323144637Sjhb "computing exponentially decaying average for " \ 324144637Sjhb "AdaptiveNUMAChunkSizing") \ 32582908Sjake \ 32682908Sjake product(intx, NUMASpaceResizeRate, 1*G, \ 32782908Sjake "Do not reallocate more that this amount per collection") \ 32880708Sjake \ 32980708Sjake product(bool, UseAdaptiveNUMAChunkSizing, true, \ 33080708Sjake "Enable adaptive chunk sizing for NUMA") \ 33180708Sjake \ 33280708Sjake product(bool, NUMAStats, false, \ 33386147Stmm "Print NUMA stats in detailed heap information") \ 33486147Stmm \ 33586147Stmm product(intx, NUMAPageScanRate, 256, \ 33686147Stmm "Maximum number of pages to include in the page scan procedure") \ 33786147Stmm \ 33886147Stmm product_pd(bool, NeedsDeoptSuspend, \ 33986147Stmm "True for register window machines (sparc/ia64)") \ 34086147Stmm \ 34186147Stmm product(intx, UseSSE, 99, \ 34286147Stmm "Highest supported SSE instructions set on x86/x64") \ 34386147Stmm \ 34486147Stmm product(uintx, LargePageSizeInBytes, 0, \ 34586147Stmm "Large page size (0 to let VM choose the page size") \ 346191980Smarius \ 347228201Sjchandra product(uintx, LargePageHeapSizeThreshold, 128*M, \ 34886147Stmm "Use large pages if max heap is at least this big") \ 34986147Stmm \ 35086147Stmm product(bool, ForceTimeHighResolution, false, \ 35186147Stmm "Using high time resolution(For Win32 only)") \ 35286523Sjake \ 353191981Smarius develop(bool, TraceItables, false, \ 35480708Sjake "Trace initialization and use of itables") \ 35580708Sjake \ 35682908Sjake develop(bool, TracePcPatching, false, \ 35782908Sjake "Trace usage of frame::patch_pc") \ 35882908Sjake \ 35982908Sjake develop(bool, TraceJumps, false, \ 36082908Sjake "Trace assembly jumps in thread ring buffer") \ 36182908Sjake \ 36280708Sjake develop(bool, TraceRelocator, false, \ 363301961Skib "Trace the bytecode relocator") \ 36480708Sjake \ 36580709Sjake develop(bool, TraceLongCompiles, false, \ 36680709Sjake "Print out every time compilation is longer than " \ 36780709Sjake "a given threashold") \ 36883366Sjulian \ 369112917Sjake develop(bool, SafepointALot, false, \ 37094254Sjake "Generates a lot of safepoints. Works with " \ 37194254Sjake "GuaranteedSafepointInterval") \ 37280708Sjake \ 37380708Sjake product_pd(bool, BackgroundCompilation, \ 37484847Stmm "A thread requesting compilation is not blocked during " \ 375113238Sjake "compilation") \ 37684847Stmm \ 377112306Sjake product(bool, PrintVMQWaitTime, false, \ 37884847Stmm "Prints out the waiting time in VM operation queue") \ 379112306Sjake \ 380112306Sjake develop(bool, BailoutToInterpreterForThrows, false, \ 381112306Sjake "Compiled methods which throws/catches exceptions will be " \ 382112306Sjake "deopt and intp.") \ 38384847Stmm \ 38484847Stmm develop(bool, NoYieldsInMicrolock, false, \ 38580708Sjake "Disable yields in microlock") \ 38680708Sjake \ 38780708Sjake develop(bool, TraceOopMapGeneration, false, \ 38886523Sjake "Shows oopmap generation") \ 389212663Smarius \ 39080708Sjake product(bool, MethodFlushing, true, \ 39180708Sjake "Reclamation of zombie and not-entrant methods") \ 392108302Sjake \ 393280957Srstone develop(bool, VerifyStack, false, \ 394108302Sjake "Verify stack of each thread when it is entering a runtime call") \ 395113238Sjake \ 396108302Sjake develop(bool, ForceUnreachable, false, \ 397108302Sjake "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \ 398108302Sjake \ 399108700Sjake notproduct(bool, StressDerivedPointers, false, \ 400108700Sjake "Force scavenge when a derived pointers is detected on stack " \ 401108302Sjake "after rtm call") \ 402108302Sjake \ 403327785Smarkj develop(bool, TraceDerivedPointers, false, \ 404327785Smarkj "Trace traversal of derived pointers on stack") \ 405327785Smarkj \ 406327785Smarkj notproduct(bool, TraceCodeBlobStacks, false, \ 407108302Sjake "Trace stack-walk of codeblobs") \ 408109615Sjeff \ 409211049Smarius product(bool, PrintJNIResolving, false, \ 410109615Sjeff "Used to implement -v:jni") \ 411223801Smarius \ 412109615Sjeff notproduct(bool, PrintRewrites, false, \ 413109615Sjeff "Print methods that are being rewritten") \ 414109615Sjeff \ 415108302Sjake product(bool, UseInlineCaches, true, \ 416109615Sjeff "Use Inline Caches for virtual calls ") \ 417116510Salc \ 418212663Smarius develop(bool, InlineArrayCopy, true, \ 419109615Sjeff "inline arraycopy native that is known to be part of " \ 420108302Sjake "base library DLL") \ 421108302Sjake \ 422108302Sjake develop(bool, InlineObjectHash, true, \ 423280957Srstone "inline Object::hashCode() native that is known to be part " \ 424108302Sjake "of base library DLL") \ 425108302Sjake \ 426108302Sjake develop(bool, InlineObjectCopy, true, \ 427108700Sjake "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 428108302Sjake \ 429172189Salc develop(bool, InlineNatives, true, \ 430108302Sjake "inline natives that are known to be part of base library DLL") \ 431263620Sbdrewery \ 432108302Sjake develop(bool, InlineMathNatives, true, \ 433269782Skib "inline SinD, CosD, etc.") \ 434269782Skib \ 435269782Skib develop(bool, InlineClassNatives, true, \ 436269782Skib "inline Class.isInstance, etc") \ 437269782Skib \ 438269782Skib develop(bool, InlineAtomicLong, true, \ 439269782Skib "inline sun.misc.AtomicLong") \ 440269782Skib \ 441269782Skib develop(bool, InlineThreadNatives, true, \ 442269782Skib "inline Thread.currentThread, etc") \ 443269782Skib \ 444269782Skib develop(bool, InlineReflectionGetCallerClass, true, \ 445269782Skib "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 446269782Skib "of base library DLL") \ 447269782Skib \ 448 develop(bool, InlineUnsafeOps, true, \ 449 "inline memory ops (native methods) from sun.misc.Unsafe") \ 450 \ 451 develop(bool, ConvertCmpD2CmpF, true, \ 452 "Convert cmpD to cmpF when one input is constant in float range") \ 453 \ 454 develop(bool, ConvertFloat2IntClipping, true, \ 455 "Convert float2int clipping idiom to integer clipping") \ 456 \ 457 develop(bool, SpecialStringCompareTo, true, \ 458 "special version of string compareTo") \ 459 \ 460 develop(bool, SpecialStringIndexOf, true, \ 461 "special version of string indexOf") \ 462 \ 463 develop(bool, TraceCallFixup, false, \ 464 "traces all call fixups") \ 465 \ 466 develop(bool, DeoptimizeALot, false, \ 467 "deoptimize at every exit from the runtime system") \ 468 \ 469 develop(ccstrlist, DeoptimizeOnlyAt, "", \ 470 "a comma separated list of bcis to deoptimize at") \ 471 \ 472 product(bool, DeoptimizeRandom, false, \ 473 "deoptimize random frames on random exit from the runtime system")\ 474 \ 475 notproduct(bool, ZombieALot, false, \ 476 "creates zombies (non-entrant) at exit from the runt. system") \ 477 \ 478 notproduct(bool, WalkStackALot, false, \ 479 "trace stack (no print) at every exit from the runtime system") \ 480 \ 481 develop(bool, Debugging, false, \ 482 "set when executing debug methods in debug.ccp " \ 483 "(to prevent triggering assertions)") \ 484 \ 485 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 486 "Enable strict checks that safepoints cannot happen for threads " \ 487 "that used No_Safepoint_Verifier") \ 488 \ 489 notproduct(bool, VerifyLastFrame, false, \ 490 "Verify oops on last frame on entry to VM") \ 491 \ 492 develop(bool, TraceHandleAllocation, false, \ 493 "Prints out warnings when suspicious many handles are allocated") \ 494 \ 495 product(bool, UseCompilerSafepoints, true, \ 496 "Stop at safepoints in compiled code") \ 497 \ 498 product(bool, UseSplitVerifier, true, \ 499 "use split verifier with StackMapTable attributes") \ 500 \ 501 product(bool, FailOverToOldVerifier, true, \ 502 "fail over to old verifier when split verifier fails") \ 503 \ 504 develop(bool, ShowSafepointMsgs, false, \ 505 "Show msg. about safepoint synch.") \ 506 \ 507 product(bool, SafepointTimeout, false, \ 508 "Time out and warn or fail after SafepointTimeoutDelay " \ 509 "milliseconds if failed to reach safepoint") \ 510 \ 511 develop(bool, DieOnSafepointTimeout, false, \ 512 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 513 \ 514 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 515 /* typically, at most a few retries are needed */ \ 516 product(intx, SuspendRetryCount, 50, \ 517 "Maximum retry count for an external suspend request") \ 518 \ 519 product(intx, SuspendRetryDelay, 5, \ 520 "Milliseconds to delay per retry (* current_retry_count)") \ 521 \ 522 product(bool, AssertOnSuspendWaitFailure, false, \ 523 "Assert/Guarantee on external suspend wait failure") \ 524 \ 525 product(bool, TraceSuspendWaitFailures, false, \ 526 "Trace external suspend wait failures") \ 527 \ 528 product(bool, MaxFDLimit, true, \ 529 "Bump the number of file descriptors to max in solaris.") \ 530 \ 531 notproduct(bool, LogEvents, trueInDebug, \ 532 "Enable Event log") \ 533 \ 534 product(bool, BytecodeVerificationRemote, true, \ 535 "Enables the Java bytecode verifier for remote classes") \ 536 \ 537 product(bool, BytecodeVerificationLocal, false, \ 538 "Enables the Java bytecode verifier for local classes") \ 539 \ 540 develop(bool, ForceFloatExceptions, trueInDebug, \ 541 "Force exceptions on FP stack under/overflow") \ 542 \ 543 develop(bool, SoftMatchFailure, trueInProduct, \ 544 "If the DFA fails to match a node, print a message and bail out") \ 545 \ 546 develop(bool, VerifyStackAtCalls, false, \ 547 "Verify that the stack pointer is unchanged after calls") \ 548 \ 549 develop(bool, TraceJavaAssertions, false, \ 550 "Trace java language assertions") \ 551 \ 552 notproduct(bool, CheckAssertionStatusDirectives, false, \ 553 "temporary - see javaClasses.cpp") \ 554 \ 555 notproduct(bool, PrintMallocFree, false, \ 556 "Trace calls to C heap malloc/free allocation") \ 557 \ 558 notproduct(bool, PrintOopAddress, false, \ 559 "Always print the location of the oop") \ 560 \ 561 notproduct(bool, VerifyCodeCacheOften, false, \ 562 "Verify compiled-code cache often") \ 563 \ 564 develop(bool, ZapDeadCompiledLocals, false, \ 565 "Zap dead locals in compiler frames") \ 566 \ 567 notproduct(bool, ZapDeadLocalsOld, false, \ 568 "Zap dead locals (old version, zaps all frames when " \ 569 "entering the VM") \ 570 \ 571 notproduct(bool, CheckOopishValues, false, \ 572 "Warn if value contains oop ( requires ZapDeadLocals)") \ 573 \ 574 develop(bool, UseMallocOnly, false, \ 575 "use only malloc/free for allocation (no resource area/arena)") \ 576 \ 577 develop(bool, PrintMalloc, false, \ 578 "print all malloc/free calls") \ 579 \ 580 develop(bool, ZapResourceArea, trueInDebug, \ 581 "Zap freed resource/arena space with 0xABABABAB") \ 582 \ 583 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 584 "Zap freed VM handle space with 0xBCBCBCBC") \ 585 \ 586 develop(bool, ZapJNIHandleArea, trueInDebug, \ 587 "Zap freed JNI handle space with 0xFEFEFEFE") \ 588 \ 589 develop(bool, ZapUnusedHeapArea, false, \ 590 "Zap unused heap space with 0xBAADBABE") \ 591 \ 592 develop(bool, PrintVMMessages, true, \ 593 "Print vm messages on console") \ 594 \ 595 product(bool, PrintGCApplicationConcurrentTime, false, \ 596 "Print the time the application has been running") \ 597 \ 598 product(bool, PrintGCApplicationStoppedTime, false, \ 599 "Print the time the application has been stopped") \ 600 \ 601 develop(bool, Verbose, false, \ 602 "Prints additional debugging information from other modes") \ 603 \ 604 develop(bool, PrintMiscellaneous, false, \ 605 "Prints uncategorized debugging information (requires +Verbose)") \ 606 \ 607 develop(bool, WizardMode, false, \ 608 "Prints much more debugging information") \ 609 \ 610 product(bool, ShowMessageBoxOnError, false, \ 611 "Keep process alive on VM fatal error") \ 612 \ 613 product_pd(bool, UseOSErrorReporting, \ 614 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 615 \ 616 product(bool, SuppressFatalErrorMessage, false, \ 617 "Do NO Fatal Error report [Avoid deadlock]") \ 618 \ 619 product(ccstrlist, OnError, "", \ 620 "Run user-defined commands on fatal error; see VMError.cpp " \ 621 "for examples") \ 622 \ 623 product(ccstrlist, OnOutOfMemoryError, "", \ 624 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 625 \ 626 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 627 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 628 \ 629 manageable(ccstr, HeapDumpPath, NULL, \ 630 "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 631 "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 632 "in the working directory)") \ 633 \ 634 develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 635 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 636 "when the heap usage is larger than this") \ 637 \ 638 develop(uintx, HeapDumpSegmentSize, 1*G, \ 639 "Approximate segment size when generating a segmented heap dump") \ 640 \ 641 develop(bool, BreakAtWarning, false, \ 642 "Execute breakpoint upon encountering VM warning") \ 643 \ 644 product_pd(bool, UseVectoredExceptions, \ 645 "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 646 \ 647 develop(bool, TraceVMOperation, false, \ 648 "Trace vm operations") \ 649 \ 650 develop(bool, UseFakeTimers, false, \ 651 "Tells whether the VM should use system time or a fake timer") \ 652 \ 653 diagnostic(bool, LogCompilation, false, \ 654 "Log compilation activity in detail to hotspot.log or LogFile") \ 655 \ 656 product(bool, PrintCompilation, false, \ 657 "Print compilations") \ 658 \ 659 diagnostic(bool, TraceNMethodInstalls, false, \ 660 "Trace nmethod intallation") \ 661 \ 662 diagnostic(bool, TraceOSRBreakpoint, false, \ 663 "Trace OSR Breakpoint ") \ 664 \ 665 diagnostic(bool, TraceCompileTriggered, false, \ 666 "Trace compile triggered") \ 667 \ 668 diagnostic(bool, TraceTriggers, false, \ 669 "Trace triggers") \ 670 \ 671 product(bool, AlwaysRestoreFPU, false, \ 672 "Restore the FPU control word after every JNI call (expensive)") \ 673 \ 674 notproduct(bool, PrintCompilation2, false, \ 675 "Print additional statistics per compilation") \ 676 \ 677 diagnostic(bool, PrintAdapterHandlers, false, \ 678 "Print code generated for i2c/c2i adapters") \ 679 \ 680 diagnostic(bool, PrintAssembly, false, \ 681 "Print assembly code (using external disassembler.so)") \ 682 \ 683 diagnostic(ccstr, PrintAssemblyOptions, false, \ 684 "Options string passed to disassembler.so") \ 685 \ 686 diagnostic(bool, PrintNMethods, false, \ 687 "Print assembly code for nmethods when generated") \ 688 \ 689 diagnostic(bool, PrintNativeNMethods, false, \ 690 "Print assembly code for native nmethods when generated") \ 691 \ 692 develop(bool, PrintDebugInfo, false, \ 693 "Print debug information for all nmethods when generated") \ 694 \ 695 develop(bool, PrintRelocations, false, \ 696 "Print relocation information for all nmethods when generated") \ 697 \ 698 develop(bool, PrintDependencies, false, \ 699 "Print dependency information for all nmethods when generated") \ 700 \ 701 develop(bool, PrintExceptionHandlers, false, \ 702 "Print exception handler tables for all nmethods when generated") \ 703 \ 704 develop(bool, InterceptOSException, false, \ 705 "Starts debugger when an implicit OS (e.g., NULL) " \ 706 "exception happens") \ 707 \ 708 notproduct(bool, PrintCodeCache, false, \ 709 "Print the compiled_code cache when exiting") \ 710 \ 711 develop(bool, PrintCodeCache2, false, \ 712 "Print detailed info on the compiled_code cache when exiting") \ 713 \ 714 diagnostic(bool, PrintStubCode, false, \ 715 "Print generated stub code") \ 716 \ 717 product(bool, StackTraceInThrowable, true, \ 718 "Collect backtrace in throwable when exception happens") \ 719 \ 720 product(bool, OmitStackTraceInFastThrow, true, \ 721 "Omit backtraces for some 'hot' exceptions in optimized code") \ 722 \ 723 product(bool, ProfilerPrintByteCodeStatistics, false, \ 724 "Prints byte code statictics when dumping profiler output") \ 725 \ 726 product(bool, ProfilerRecordPC, false, \ 727 "Collects tick for each 16 byte interval of compiled code") \ 728 \ 729 product(bool, ProfileVM, false, \ 730 "Profiles ticks that fall within VM (either in the VM Thread " \ 731 "or VM code called through stubs)") \ 732 \ 733 product(bool, ProfileIntervals, false, \ 734 "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 735 \ 736 notproduct(bool, ProfilerCheckIntervals, false, \ 737 "Collect and print info on spacing of profiler ticks") \ 738 \ 739 develop(bool, PrintJVMWarnings, false, \ 740 "Prints warnings for unimplemented JVM functions") \ 741 \ 742 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 743 "Prints warnings for stalled SpinLocks") \ 744 \ 745 develop(bool, InitializeJavaLangSystem, true, \ 746 "Initialize java.lang.System - turn off for individual " \ 747 "method debugging") \ 748 \ 749 develop(bool, InitializeJavaLangString, true, \ 750 "Initialize java.lang.String - turn off for individual " \ 751 "method debugging") \ 752 \ 753 develop(bool, InitializeJavaLangExceptionsErrors, true, \ 754 "Initialize various error and exception classes - turn off for " \ 755 "individual method debugging") \ 756 \ 757 product(bool, RegisterFinalizersAtInit, true, \ 758 "Register finalizable objects at end of Object.<init> or " \ 759 "after allocation.") \ 760 \ 761 develop(bool, RegisterReferences, true, \ 762 "Tells whether the VM should register soft/weak/final/phantom " \ 763 "references") \ 764 \ 765 develop(bool, IgnoreRewrites, false, \ 766 "Supress rewrites of bytecodes in the oopmap generator. " \ 767 "This is unsafe!") \ 768 \ 769 develop(bool, PrintCodeCacheExtension, false, \ 770 "Print extension of code cache") \ 771 \ 772 develop(bool, UsePrivilegedStack, true, \ 773 "Enable the security JVM functions") \ 774 \ 775 develop(bool, IEEEPrecision, true, \ 776 "Enables IEEE precision (for INTEL only)") \ 777 \ 778 develop(bool, ProtectionDomainVerification, true, \ 779 "Verifies protection domain before resolution in system " \ 780 "dictionary") \ 781 \ 782 product(bool, ClassUnloading, true, \ 783 "Do unloading of classes") \ 784 \ 785 diagnostic(bool, LinkWellKnownClasses, true, \ 786 "Resolve a well known class as soon as its name is seen") \ 787 \ 788 develop(bool, DisableStartThread, false, \ 789 "Disable starting of additional Java threads " \ 790 "(for debugging only)") \ 791 \ 792 develop(bool, MemProfiling, false, \ 793 "Write memory usage profiling to log file") \ 794 \ 795 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 796 "Prints the system dictionary at exit") \ 797 \ 798 diagnostic(bool, UnsyncloadClass, false, \ 799 "Unstable: VM calls loadClass unsynchronized. Custom classloader "\ 800 "must call VM synchronized for findClass & defineClass") \ 801 \ 802 product_pd(bool, DontYieldALot, \ 803 "Throw away obvious excess yield calls (for SOLARIS only)") \ 804 \ 805 product_pd(bool, ConvertSleepToYield, \ 806 "Converts sleep(0) to thread yield " \ 807 "(may be off for SOLARIS to improve GUI)") \ 808 \ 809 product(bool, ConvertYieldToSleep, false, \ 810 "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 811 "behavior (SOLARIS only)") \ 812 \ 813 product(bool, UseBoundThreads, true, \ 814 "Bind user level threads to kernel threads (for SOLARIS only)") \ 815 \ 816 develop(bool, UseDetachedThreads, true, \ 817 "Use detached threads that are recycled upon termination " \ 818 "(for SOLARIS only)") \ 819 \ 820 product(bool, UseLWPSynchronization, true, \ 821 "Use LWP-based instead of libthread-based synchronization " \ 822 "(SPARC only)") \ 823 \ 824 product(ccstr, SyncKnobs, "", \ 825 "(Unstable) Various monitor synchronization tunables") \ 826 \ 827 product(intx, EmitSync, 0, \ 828 "(Unsafe,Unstable) " \ 829 " Controls emission of inline sync fast-path code") \ 830 \ 831 product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 832 \ 833 product(intx, Atomics, 0, \ 834 "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 835 \ 836 product(intx, FenceInstruction, 0, \ 837 "(Unsafe,Unstable) Experimental") \ 838 \ 839 product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 840 \ 841 product(intx, SyncVerbose, 0, "(Unstable)" ) \ 842 \ 843 product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 844 \ 845 product(intx, hashCode, 0, \ 846 "(Unstable) select hashCode generation algorithm" ) \ 847 \ 848 product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 849 "(Unstable, Linux-specific)" \ 850 " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 851 \ 852 product(bool, FilterSpuriousWakeups , true, \ 853 "Prevent spurious or premature wakeups from object.wait" \ 854 "(Solaris only)") \ 855 \ 856 product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 857 product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 858 product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 859 \ 860 develop(bool, UsePthreads, false, \ 861 "Use pthread-based instead of libthread-based synchronization " \ 862 "(SPARC only)") \ 863 \ 864 product(bool, AdjustConcurrency, false, \ 865 "call thr_setconcurrency at thread create time to avoid " \ 866 "LWP starvation on MP systems (For Solaris Only)") \ 867 \ 868 develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 869 "Should the system attempt to update the compiler file when " \ 870 "an error occurs?") \ 871 \ 872 product(bool, ReduceSignalUsage, false, \ 873 "Reduce the use of OS signals in Java and/or the VM") \ 874 \ 875 notproduct(bool, ValidateMarkSweep, false, \ 876 "Do extra validation during MarkSweep collection") \ 877 \ 878 notproduct(bool, RecordMarkSweepCompaction, false, \ 879 "Enable GC-to-GC recording and querying of compaction during " \ 880 "MarkSweep") \ 881 \ 882 develop_pd(bool, ShareVtableStubs, \ 883 "Share vtable stubs (smaller code but worse branch prediction") \ 884 \ 885 develop(bool, LoadLineNumberTables, true, \ 886 "Tells whether the class file parser loads line number tables") \ 887 \ 888 develop(bool, LoadLocalVariableTables, true, \ 889 "Tells whether the class file parser loads local variable tables")\ 890 \ 891 develop(bool, LoadLocalVariableTypeTables, true, \ 892 "Tells whether the class file parser loads local variable type tables")\ 893 \ 894 product(bool, AllowUserSignalHandlers, false, \ 895 "Do not complain if the application installs signal handlers " \ 896 "(Solaris & Linux only)") \ 897 \ 898 product(bool, UseSignalChaining, true, \ 899 "Use signal-chaining to invoke signal handlers installed " \ 900 "by the application (Solaris & Linux only)") \ 901 \ 902 product(bool, UseAltSigs, false, \ 903 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 904 "internal signals. (Solaris only)") \ 905 \ 906 product(bool, UseSpinning, false, \ 907 "Use spinning in monitor inflation and before entry") \ 908 \ 909 product(bool, PreSpinYield, false, \ 910 "Yield before inner spinning loop") \ 911 \ 912 product(bool, PostSpinYield, true, \ 913 "Yield after inner spinning loop") \ 914 \ 915 product(bool, AllowJNIEnvProxy, false, \ 916 "Allow JNIEnv proxies for jdbx") \ 917 \ 918 product(bool, JNIDetachReleasesMonitors, true, \ 919 "JNI DetachCurrentThread releases monitors owned by thread") \ 920 \ 921 product(bool, RestoreMXCSROnJNICalls, false, \ 922 "Restore MXCSR when returning from JNI calls") \ 923 \ 924 product(bool, CheckJNICalls, false, \ 925 "Verify all arguments to JNI calls") \ 926 \ 927 product(bool, UseFastJNIAccessors, true, \ 928 "Use optimized versions of Get<Primitive>Field") \ 929 \ 930 product(bool, EagerXrunInit, false, \ 931 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 932 " but not all -Xrun libraries may support the state of the VM at this time") \ 933 \ 934 product(bool, PreserveAllAnnotations, false, \ 935 "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 936 \ 937 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 938 "Number of OutOfMemoryErrors preallocated with backtrace") \ 939 \ 940 product(bool, LazyBootClassLoader, true, \ 941 "Enable/disable lazy opening of boot class path entries") \ 942 \ 943 diagnostic(bool, UseIncDec, true, \ 944 "Use INC, DEC instructions on x86") \ 945 \ 946 product(bool, UseStoreImmI16, true, \ 947 "Use store immediate 16-bits value instruction on x86") \ 948 \ 949 product(bool, UseAddressNop, false, \ 950 "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 951 \ 952 product(bool, UseXmmLoadAndClearUpper, true, \ 953 "Load low part of XMM register and clear upper part") \ 954 \ 955 product(bool, UseXmmRegToRegMoveAll, false, \ 956 "Copy all XMM register bits when moving value between registers") \ 957 \ 958 product(bool, UseXmmI2D, false, \ 959 "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 960 \ 961 product(bool, UseXmmI2F, false, \ 962 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 963 \ 964 product(intx, FieldsAllocationStyle, 1, \ 965 "0 - type based with oops first, 1 - with oops last") \ 966 \ 967 product(bool, CompactFields, true, \ 968 "Allocate nonstatic fields in gaps between previous fields") \ 969 \ 970 notproduct(bool, PrintCompactFieldsSavings, false, \ 971 "Print how many words were saved with CompactFields") \ 972 \ 973 product(bool, UseBiasedLocking, true, \ 974 "Enable biased locking in JVM") \ 975 \ 976 product(intx, BiasedLockingStartupDelay, 4000, \ 977 "Number of milliseconds to wait before enabling biased locking") \ 978 \ 979 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 980 "Print statistics of biased locking in JVM") \ 981 \ 982 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 983 "Threshold of number of revocations per type to try to " \ 984 "rebias all objects in the heap of that type") \ 985 \ 986 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 987 "Threshold of number of revocations per type to permanently " \ 988 "revoke biases of all objects in the heap of that type") \ 989 \ 990 product(intx, BiasedLockingDecayTime, 25000, \ 991 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 992 "type after previous bulk rebias") \ 993 \ 994 /* tracing */ \ 995 \ 996 notproduct(bool, TraceRuntimeCalls, false, \ 997 "Trace run-time calls") \ 998 \ 999 develop(bool, TraceJNICalls, false, \ 1000 "Trace JNI calls") \ 1001 \ 1002 notproduct(bool, TraceJVMCalls, false, \ 1003 "Trace JVM calls") \ 1004 \ 1005 product(ccstr, TraceJVMTI, "", \ 1006 "Trace flags for JVMTI functions and events") \ 1007 \ 1008 /* This option can change an EMCP method into an obsolete method. */ \ 1009 /* This can affect tests that except specific methods to be EMCP. */ \ 1010 /* This option should be used with caution. */ \ 1011 product(bool, StressLdcRewrite, false, \ 1012 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1013 \ 1014 product(intx, TraceRedefineClasses, 0, \ 1015 "Trace level for JVMTI RedefineClasses") \ 1016 \ 1017 /* change to false by default sometime after Mustang */ \ 1018 product(bool, VerifyMergedCPBytecodes, true, \ 1019 "Verify bytecodes after RedefineClasses constant pool merging") \ 1020 \ 1021 develop(bool, TraceJNIHandleAllocation, false, \ 1022 "Trace allocation/deallocation of JNI handle blocks") \ 1023 \ 1024 develop(bool, TraceThreadEvents, false, \ 1025 "Trace all thread events") \ 1026 \ 1027 develop(bool, TraceBytecodes, false, \ 1028 "Trace bytecode execution") \ 1029 \ 1030 develop(bool, TraceClassInitialization, false, \ 1031 "Trace class initialization") \ 1032 \ 1033 develop(bool, TraceExceptions, false, \ 1034 "Trace exceptions") \ 1035 \ 1036 develop(bool, TraceICs, false, \ 1037 "Trace inline cache changes") \ 1038 \ 1039 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1040 "Trace method invocation counter overflow") \ 1041 \ 1042 develop(bool, TraceInlineCacheClearing, false, \ 1043 "Trace clearing of inline caches in nmethods") \ 1044 \ 1045 develop(bool, TraceDependencies, false, \ 1046 "Trace dependencies") \ 1047 \ 1048 develop(bool, VerifyDependencies, trueInDebug, \ 1049 "Exercise and verify the compilation dependency mechanism") \ 1050 \ 1051 develop(bool, TraceNewOopMapGeneration, false, \ 1052 "Trace OopMapGeneration") \ 1053 \ 1054 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1055 "Trace OopMapGeneration: print detailed cell states") \ 1056 \ 1057 develop(bool, TimeOopMap, false, \ 1058 "Time calls to GenerateOopMap::compute_map() in sum") \ 1059 \ 1060 develop(bool, TimeOopMap2, false, \ 1061 "Time calls to GenerateOopMap::compute_map() individually") \ 1062 \ 1063 develop(bool, TraceMonitorMismatch, false, \ 1064 "Trace monitor matching failures during OopMapGeneration") \ 1065 \ 1066 develop(bool, TraceOopMapRewrites, false, \ 1067 "Trace rewritting of method oops during oop map generation") \ 1068 \ 1069 develop(bool, TraceSafepoint, false, \ 1070 "Trace safepoint operations") \ 1071 \ 1072 develop(bool, TraceICBuffer, false, \ 1073 "Trace usage of IC buffer") \ 1074 \ 1075 develop(bool, TraceCompiledIC, false, \ 1076 "Trace changes of compiled IC") \ 1077 \ 1078 notproduct(bool, TraceZapDeadLocals, false, \ 1079 "Trace zapping dead locals") \ 1080 \ 1081 develop(bool, TraceStartupTime, false, \ 1082 "Trace setup time") \ 1083 \ 1084 develop(bool, TraceHPI, false, \ 1085 "Trace Host Porting Interface (HPI)") \ 1086 \ 1087 product(ccstr, HPILibPath, NULL, \ 1088 "Specify alternate path to HPI library") \ 1089 \ 1090 develop(bool, TraceProtectionDomainVerification, false, \ 1091 "Trace protection domain verifcation") \ 1092 \ 1093 develop(bool, TraceClearedExceptions, false, \ 1094 "Prints when an exception is forcibly cleared") \ 1095 \ 1096 product(bool, TraceClassResolution, false, \ 1097 "Trace all constant pool resolutions (for debugging)") \ 1098 \ 1099 product(bool, TraceBiasedLocking, false, \ 1100 "Trace biased locking in JVM") \ 1101 \ 1102 product(bool, TraceMonitorInflation, false, \ 1103 "Trace monitor inflation in JVM") \ 1104 \ 1105 /* assembler */ \ 1106 product(bool, Use486InstrsOnly, false, \ 1107 "Use 80486 Compliant instruction subset") \ 1108 \ 1109 /* gc */ \ 1110 \ 1111 product(bool, UseSerialGC, false, \ 1112 "Tells whether the VM should use serial garbage collector") \ 1113 \ 1114 product(bool, UseParallelGC, false, \ 1115 "Use the Parallel Scavenge garbage collector") \ 1116 \ 1117 product(bool, UseParallelOldGC, false, \ 1118 "Use the Parallel Old garbage collector") \ 1119 \ 1120 product(bool, UseParallelOldGCCompacting, true, \ 1121 "In the Parallel Old garbage collector use parallel compaction") \ 1122 \ 1123 product(bool, UseParallelDensePrefixUpdate, true, \ 1124 "In the Parallel Old garbage collector use parallel dense" \ 1125 " prefix update") \ 1126 \ 1127 develop(bool, UseParallelOldGCChunkPointerCalc, true, \ 1128 "In the Parallel Old garbage collector use chucks to calculate" \ 1129 " new object locations") \ 1130 \ 1131 product(uintx, HeapMaximumCompactionInterval, 20, \ 1132 "How often should we maximally compact the heap (not allowing " \ 1133 "any dead space)") \ 1134 \ 1135 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1136 "The collection count for the first maximum compaction") \ 1137 \ 1138 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1139 "In the Parallel Old garbage collector maximum compaction for " \ 1140 "a system GC") \ 1141 \ 1142 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1143 "The mean used by the par compact dead wood" \ 1144 "limiter (a number between 0-100).") \ 1145 \ 1146 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1147 "The standard deviation used by the par compact dead wood" \ 1148 "limiter (a number between 0-100).") \ 1149 \ 1150 product(bool, UseParallelOldGCDensePrefix, true, \ 1151 "Use a dense prefix with the Parallel Old garbage collector") \ 1152 \ 1153 product(uintx, ParallelGCThreads, 0, \ 1154 "Number of parallel threads parallel gc will use") \ 1155 \ 1156 product(uintx, ParallelCMSThreads, 0, \ 1157 "Max number of threads CMS will use for concurrent work") \ 1158 \ 1159 develop(bool, VerifyParallelOldWithMarkSweep, false, \ 1160 "Use the MarkSweep code to verify phases of Parallel Old") \ 1161 \ 1162 develop(uintx, VerifyParallelOldWithMarkSweepInterval, 1, \ 1163 "Interval at which the MarkSweep code is used to verify " \ 1164 "phases of Parallel Old") \ 1165 \ 1166 develop(bool, ParallelOldMTUnsafeMarkBitMap, false, \ 1167 "Use the Parallel Old MT unsafe in marking the bitmap") \ 1168 \ 1169 develop(bool, ParallelOldMTUnsafeUpdateLiveData, false, \ 1170 "Use the Parallel Old MT unsafe in update of live size") \ 1171 \ 1172 develop(bool, TraceChunkTasksQueuing, false, \ 1173 "Trace the queuing of the chunk tasks") \ 1174 \ 1175 product(uintx, YoungPLABSize, 4096, \ 1176 "Size of young gen promotion labs (in HeapWords)") \ 1177 \ 1178 product(uintx, OldPLABSize, 1024, \ 1179 "Size of old gen promotion labs (in HeapWords)") \ 1180 \ 1181 product(uintx, GCTaskTimeStampEntries, 200, \ 1182 "Number of time stamp entries per gc worker thread") \ 1183 \ 1184 product(bool, AlwaysTenure, false, \ 1185 "Always tenure objects in eden. (ParallelGC only)") \ 1186 \ 1187 product(bool, NeverTenure, false, \ 1188 "Never tenure objects in eden, May tenure on overflow" \ 1189 " (ParallelGC only)") \ 1190 \ 1191 product(bool, ScavengeBeforeFullGC, true, \ 1192 "Scavenge youngest generation before each full GC," \ 1193 " used with UseParallelGC") \ 1194 \ 1195 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1196 "Allow scavenges to occur when to_space contains objects.") \ 1197 \ 1198 product(bool, UseConcMarkSweepGC, false, \ 1199 "Use Concurrent Mark-Sweep GC in the old generation") \ 1200 \ 1201 product(bool, ExplicitGCInvokesConcurrent, false, \ 1202 "A System.gc() request invokes a concurrent collection;" \ 1203 " (effective only when UseConcMarkSweepGC)") \ 1204 \ 1205 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1206 "A System.gc() request invokes a concurrent collection and" \ 1207 " also unloads classes during such a concurrent gc cycle " \ 1208 " (effective only when UseConcMarkSweepGC)") \ 1209 \ 1210 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1211 "Use Adaptive Free Lists in the CMS generation") \ 1212 \ 1213 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1214 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1215 \ 1216 develop(bool, RotateCMSCollectionTypes, false, \ 1217 "Rotate the CMS collections among concurrent and STW") \ 1218 \ 1219 product(bool, UseCMSBestFit, true, \ 1220 "Use CMS best fit allocation strategy") \ 1221 \ 1222 product(bool, UseCMSCollectionPassing, true, \ 1223 "Use passing of collection from background to foreground") \ 1224 \ 1225 product(bool, UseParNewGC, false, \ 1226 "Use parallel threads in the new generation.") \ 1227 \ 1228 product(bool, ParallelGCVerbose, false, \ 1229 "Verbose output for parallel GC.") \ 1230 \ 1231 product(intx, ParallelGCBufferWastePct, 10, \ 1232 "wasted fraction of parallel allocation buffer.") \ 1233 \ 1234 product(bool, ParallelGCRetainPLAB, true, \ 1235 "Retain parallel allocation buffers across scavenges.") \ 1236 \ 1237 product(intx, TargetPLABWastePct, 10, \ 1238 "target wasted space in last buffer as pct of overall allocation")\ 1239 \ 1240 product(uintx, PLABWeight, 75, \ 1241 "Percentage (0-100) used to weight the current sample when" \ 1242 "computing exponentially decaying average for ResizePLAB.") \ 1243 \ 1244 product(bool, ResizePLAB, true, \ 1245 "Dynamically resize (survivor space) promotion labs") \ 1246 \ 1247 product(bool, PrintPLAB, false, \ 1248 "Print (survivor space) promotion labs sizing decisions") \ 1249 \ 1250 product(intx, ParGCArrayScanChunk, 50, \ 1251 "Scan a subset and push remainder, if array is bigger than this") \ 1252 \ 1253 product(intx, ParGCDesiredObjsFromOverflowList, 20, \ 1254 "The desired number of objects to claim from the overflow list") \ 1255 \ 1256 product(uintx, CMSParPromoteBlocksToClaim, 50, \ 1257 "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1258 "parallel GC.") \ 1259 \ 1260 product(bool, AlwaysPreTouch, false, \ 1261 "It forces all freshly committed pages to be pre-touched.") \ 1262 \ 1263 product(bool, CMSUseOldDefaults, false, \ 1264 "A flag temporarily introduced to allow reverting to some older" \ 1265 "default settings; older as of 6.0 ") \ 1266 \ 1267 product(intx, CMSYoungGenPerWorker, 16*M, \ 1268 "The amount of young gen chosen by default per GC worker " \ 1269 "thread available ") \ 1270 \ 1271 product(bool, CMSIncrementalMode, false, \ 1272 "Whether CMS GC should operate in \"incremental\" mode") \ 1273 \ 1274 product(uintx, CMSIncrementalDutyCycle, 10, \ 1275 "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1276 "CMSIncrementalPacing is enabled, then this is just the initial" \ 1277 "value") \ 1278 \ 1279 product(bool, CMSIncrementalPacing, true, \ 1280 "Whether the CMS incremental mode duty cycle should be " \ 1281 "automatically adjusted") \ 1282 \ 1283 product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1284 "Lower bound on the duty cycle when CMSIncrementalPacing is" \ 1285 "enabled (a percentage, 0-100).") \ 1286 \ 1287 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1288 "Percentage (0-100) used to add conservatism when computing the" \ 1289 "duty cycle.") \ 1290 \ 1291 product(uintx, CMSIncrementalOffset, 0, \ 1292 "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1293 "is shifted to the right within the period between young GCs") \ 1294 \ 1295 product(uintx, CMSExpAvgFactor, 25, \ 1296 "Percentage (0-100) used to weight the current sample when" \ 1297 "computing exponential averages for CMS statistics.") \ 1298 \ 1299 product(uintx, CMS_FLSWeight, 50, \ 1300 "Percentage (0-100) used to weight the current sample when" \ 1301 "computing exponentially decating averages for CMS FLS statistics.") \ 1302 \ 1303 product(uintx, CMS_FLSPadding, 2, \ 1304 "The multiple of deviation from mean to use for buffering" \ 1305 "against volatility in free list demand.") \ 1306 \ 1307 product(uintx, FLSCoalescePolicy, 2, \ 1308 "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1309 \ 1310 product(uintx, CMS_SweepWeight, 50, \ 1311 "Percentage (0-100) used to weight the current sample when" \ 1312 "computing exponentially decaying average for inter-sweep duration.") \ 1313 \ 1314 product(uintx, CMS_SweepPadding, 2, \ 1315 "The multiple of deviation from mean to use for buffering" \ 1316 "against volatility in inter-sweep duration.") \ 1317 \ 1318 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1319 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1320 " duration exceeds this threhold in milliseconds") \ 1321 \ 1322 develop(bool, CMSTraceIncrementalMode, false, \ 1323 "Trace CMS incremental mode") \ 1324 \ 1325 develop(bool, CMSTraceIncrementalPacing, false, \ 1326 "Trace CMS incremental mode pacing computation") \ 1327 \ 1328 develop(bool, CMSTraceThreadState, false, \ 1329 "Trace the CMS thread state (enable the trace_state() method)") \ 1330 \ 1331 product(bool, CMSClassUnloadingEnabled, false, \ 1332 "Whether class unloading enabled when using CMS GC") \ 1333 \ 1334 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1335 "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1336 " for which classes may not be unloaded") \ 1337 \ 1338 product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1339 "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1340 \ 1341 product(bool, UseCMSCompactAtFullCollection, true, \ 1342 "Use mark sweep compact at full collections") \ 1343 \ 1344 product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1345 "Number of CMS full collection done before compaction if > 0") \ 1346 \ 1347 develop(intx, CMSDictionaryChoice, 0, \ 1348 "Use BinaryTreeDictionary as default in the CMS generation") \ 1349 \ 1350 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1351 "Replenish and indexed free list with this number of chunks") \ 1352 \ 1353 product(bool, CMSLoopWarn, false, \ 1354 "Warn in case of excessive CMS looping") \ 1355 \ 1356 develop(bool, CMSOverflowEarlyRestoration, false, \ 1357 "Whether preserved marks should be restored early") \ 1358 \ 1359 product(uintx, CMSMarkStackSize, 32*K, \ 1360 "Size of CMS marking stack") \ 1361 \ 1362 product(uintx, CMSMarkStackSizeMax, 4*M, \ 1363 "Max size of CMS marking stack") \ 1364 \ 1365 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1366 "Whether we should simulate frequent marking stack / work queue" \ 1367 " overflow") \ 1368 \ 1369 notproduct(intx, CMSMarkStackOverflowInterval, 1000, \ 1370 "A per-thread `interval' counter that determines how frequently" \ 1371 " we simulate overflow; a smaller number increases frequency") \ 1372 \ 1373 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1374 "(Temporary, subject to experimentation)" \ 1375 "Maximum number of abortable preclean iterations, if > 0") \ 1376 \ 1377 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1378 "(Temporary, subject to experimentation)" \ 1379 "Maximum time in abortable preclean in ms") \ 1380 \ 1381 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1382 "(Temporary, subject to experimentation)" \ 1383 "Nominal minimum work per abortable preclean iteration") \ 1384 \ 1385 product(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1386 "(Temporary, subject to experimentation)" \ 1387 " Time that we sleep between iterations when not given" \ 1388 " enough work per iteration") \ 1389 \ 1390 product(uintx, CMSRescanMultiple, 32, \ 1391 "Size (in cards) of CMS parallel rescan task") \ 1392 \ 1393 product(uintx, CMSConcMarkMultiple, 32, \ 1394 "Size (in cards) of CMS concurrent MT marking task") \ 1395 \ 1396 product(uintx, CMSRevisitStackSize, 1*M, \ 1397 "Size of CMS KlassKlass revisit stack") \ 1398 \ 1399 product(bool, CMSAbortSemantics, false, \ 1400 "Whether abort-on-overflow semantics is implemented") \ 1401 \ 1402 product(bool, CMSParallelRemarkEnabled, true, \ 1403 "Whether parallel remark enabled (only if ParNewGC)") \ 1404 \ 1405 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1406 "Whether parallel remark of survivor space" \ 1407 " enabled (effective only if CMSParallelRemarkEnabled)") \ 1408 \ 1409 product(bool, CMSPLABRecordAlways, true, \ 1410 "Whether to always record survivor space PLAB bdries" \ 1411 " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1412 \ 1413 product(bool, CMSConcurrentMTEnabled, true, \ 1414 "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1415 \ 1416 product(bool, CMSPermGenPrecleaningEnabled, true, \ 1417 "Whether concurrent precleaning enabled in perm gen" \ 1418 " (effective only when CMSPrecleaningEnabled is true)") \ 1419 \ 1420 product(bool, CMSPrecleaningEnabled, true, \ 1421 "Whether concurrent precleaning enabled") \ 1422 \ 1423 product(uintx, CMSPrecleanIter, 3, \ 1424 "Maximum number of precleaning iteration passes") \ 1425 \ 1426 product(uintx, CMSPrecleanNumerator, 2, \ 1427 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1428 " ratio") \ 1429 \ 1430 product(uintx, CMSPrecleanDenominator, 3, \ 1431 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1432 " ratio") \ 1433 \ 1434 product(bool, CMSPrecleanRefLists1, true, \ 1435 "Preclean ref lists during (initial) preclean phase") \ 1436 \ 1437 product(bool, CMSPrecleanRefLists2, false, \ 1438 "Preclean ref lists during abortable preclean phase") \ 1439 \ 1440 product(bool, CMSPrecleanSurvivors1, false, \ 1441 "Preclean survivors during (initial) preclean phase") \ 1442 \ 1443 product(bool, CMSPrecleanSurvivors2, true, \ 1444 "Preclean survivors during abortable preclean phase") \ 1445 \ 1446 product(uintx, CMSPrecleanThreshold, 1000, \ 1447 "Don't re-iterate if #dirty cards less than this") \ 1448 \ 1449 product(bool, CMSCleanOnEnter, true, \ 1450 "Clean-on-enter optimization for reducing number of dirty cards") \ 1451 \ 1452 product(uintx, CMSRemarkVerifyVariant, 1, \ 1453 "Choose variant (1,2) of verification following remark") \ 1454 \ 1455 product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1456 "If Eden used is below this value, don't try to schedule remark") \ 1457 \ 1458 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1459 "The Eden occupancy % at which to try and schedule remark pause") \ 1460 \ 1461 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1462 "Start sampling Eden top at least before yg occupancy reaches" \ 1463 " 1/<ratio> of the size at which we plan to schedule remark") \ 1464 \ 1465 product(uintx, CMSSamplingGrain, 16*K, \ 1466 "The minimum distance between eden samples for CMS (see above)") \ 1467 \ 1468 product(bool, CMSScavengeBeforeRemark, false, \ 1469 "Attempt scavenge before the CMS remark step") \ 1470 \ 1471 develop(bool, CMSTraceSweeper, false, \ 1472 "Trace some actions of the CMS sweeper") \ 1473 \ 1474 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1475 "Don't drain below this size per parallel worker/thief") \ 1476 \ 1477 product(intx, CMSWaitDuration, 2000, \ 1478 "Time in milliseconds that CMS thread waits for young GC") \ 1479 \ 1480 product(bool, CMSYield, true, \ 1481 "Yield between steps of concurrent mark & sweep") \ 1482 \ 1483 product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1484 "Bitmap operations should process at most this many bits" \ 1485 "between yields") \ 1486 \ 1487 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1488 "Verify that all refs across the FLS boundary " \ 1489 " are to valid objects") \ 1490 \ 1491 diagnostic(bool, FLSVerifyLists, false, \ 1492 "Do lots of (expensive) FreeListSpace verification") \ 1493 \ 1494 diagnostic(bool, FLSVerifyIndexTable, false, \ 1495 "Do lots of (expensive) FLS index table verification") \ 1496 \ 1497 develop(bool, FLSVerifyDictionary, false, \ 1498 "Do lots of (expensive) FLS dictionary verification") \ 1499 \ 1500 develop(bool, VerifyBlockOffsetArray, false, \ 1501 "Do (expensive!) block offset array verification") \ 1502 \ 1503 product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \ 1504 "Maintain _unallocated_block in BlockOffsetArray" \ 1505 " (currently applicable only to CMS collector)") \ 1506 \ 1507 develop(bool, TraceCMSState, false, \ 1508 "Trace the state of the CMS collection") \ 1509 \ 1510 product(intx, RefDiscoveryPolicy, 0, \ 1511 "Whether reference-based(0) or referent-based(1)") \ 1512 \ 1513 product(bool, ParallelRefProcEnabled, false, \ 1514 "Enable parallel reference processing whenever possible") \ 1515 \ 1516 product(bool, ParallelRefProcBalancingEnabled, true, \ 1517 "Enable balancing of reference processing queues") \ 1518 \ 1519 product(intx, CMSTriggerRatio, 80, \ 1520 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1521 " allocated before a CMS collection cycle commences") \ 1522 \ 1523 product(intx, CMSTriggerPermRatio, 80, \ 1524 "Percentage of MinHeapFreeRatio in the CMS perm generation that" \ 1525 " is allocated before a CMS collection cycle commences, that " \ 1526 " also collects the perm generation") \ 1527 \ 1528 product(uintx, CMSBootstrapOccupancy, 50, \ 1529 "Percentage CMS generation occupancy at which to " \ 1530 " initiate CMS collection for bootstrapping collection stats") \ 1531 \ 1532 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1533 "Percentage CMS generation occupancy to start a CMS collection " \ 1534 " cycle (A negative value means that CMSTriggerRatio is used)") \ 1535 \ 1536 product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 1537 "Percentage CMS perm generation occupancy to start a CMScollection"\ 1538 " cycle (A negative value means that CMSTriggerPermRatio is used)")\ 1539 \ 1540 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1541 "Only use occupancy as a crierion for starting a CMS collection") \ 1542 \ 1543 product(intx, CMSIsTooFullPercentage, 98, \ 1544 "An absolute ceiling above which CMS will always consider the" \ 1545 " perm gen ripe for collection") \ 1546 \ 1547 develop(bool, CMSTestInFreeList, false, \ 1548 "Check if the coalesced range is already in the " \ 1549 "free lists as claimed.") \ 1550 \ 1551 notproduct(bool, CMSVerifyReturnedBytes, false, \ 1552 "Check that all the garbage collected was returned to the " \ 1553 "free lists.") \ 1554 \ 1555 notproduct(bool, ScavengeALot, false, \ 1556 "Force scavenge at every Nth exit from the runtime system " \ 1557 "(N=ScavengeALotInterval)") \ 1558 \ 1559 develop(bool, FullGCALot, false, \ 1560 "Force full gc at every Nth exit from the runtime system " \ 1561 "(N=FullGCALotInterval)") \ 1562 \ 1563 notproduct(bool, GCALotAtAllSafepoints, false, \ 1564 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1565 \ 1566 product(bool, HandlePromotionFailure, true, \ 1567 "The youngest generation collection does not require" \ 1568 " a guarantee of full promotion of all live objects.") \ 1569 \ 1570 notproduct(bool, PromotionFailureALot, false, \ 1571 "Use promotion failure handling on every youngest generation " \ 1572 "collection") \ 1573 \ 1574 develop(uintx, PromotionFailureALotCount, 1000, \ 1575 "Number of promotion failures occurring at ParGCAllocBuffer" \ 1576 "refill attempts (ParNew) or promotion attempts " \ 1577 "(other young collectors) ") \ 1578 \ 1579 develop(uintx, PromotionFailureALotInterval, 5, \ 1580 "Total collections between promotion failures alot") \ 1581 \ 1582 develop(intx, WorkStealingSleepMillis, 1, \ 1583 "Sleep time when sleep is used for yields") \ 1584 \ 1585 develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ 1586 "Number of yields before a sleep is done during workstealing") \ 1587 \ 1588 product(uintx, PreserveMarkStackSize, 40, \ 1589 "Size for stack used in promotion failure handling") \ 1590 \ 1591 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1592 \ 1593 product_pd(bool, ResizeTLAB, \ 1594 "Dynamically resize tlab size for threads") \ 1595 \ 1596 product(bool, ZeroTLAB, false, \ 1597 "Zero out the newly created TLAB") \ 1598 \ 1599 product(bool, PrintTLAB, false, \ 1600 "Print various TLAB related information") \ 1601 \ 1602 product(bool, TLABStats, true, \ 1603 "Print various TLAB related information") \ 1604 \ 1605 product_pd(bool, NeverActAsServerClassMachine, \ 1606 "Never act like a server-class machine") \ 1607 \ 1608 product(bool, AlwaysActAsServerClassMachine, false, \ 1609 "Always act like a server-class machine") \ 1610 \ 1611 product_pd(uintx, DefaultMaxRAM, \ 1612 "Maximum real memory size for setting server class heap size") \ 1613 \ 1614 product(uintx, DefaultMaxRAMFraction, 4, \ 1615 "Fraction (1/n) of real memory used for server class max heap") \ 1616 \ 1617 product(uintx, DefaultInitialRAMFraction, 64, \ 1618 "Fraction (1/n) of real memory used for server class initial heap") \ 1619 \ 1620 product(bool, UseAutoGCSelectPolicy, false, \ 1621 "Use automatic collection selection policy") \ 1622 \ 1623 product(uintx, AutoGCSelectPauseMillis, 5000, \ 1624 "Automatic GC selection pause threshhold in ms") \ 1625 \ 1626 product(bool, UseAdaptiveSizePolicy, true, \ 1627 "Use adaptive generation sizing policies") \ 1628 \ 1629 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1630 "Use adaptive survivor sizing policies") \ 1631 \ 1632 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1633 "Use adaptive young-old sizing policies at minor collections") \ 1634 \ 1635 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1636 "Use adaptive young-old sizing policies at major collections") \ 1637 \ 1638 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1639 "Use statistics from System.GC for adaptive size policy") \ 1640 \ 1641 product(bool, UseAdaptiveGCBoundary, false, \ 1642 "Allow young-old boundary to move") \ 1643 \ 1644 develop(bool, TraceAdaptiveGCBoundary, false, \ 1645 "Trace young-old boundary moves") \ 1646 \ 1647 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1648 "Resize the virtual spaces of the young or old generations") \ 1649 \ 1650 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1651 "Policy for changeing generation size for throughput goals") \ 1652 \ 1653 product(uintx, AdaptiveSizePausePolicy, 0, \ 1654 "Policy for changing generation size for pause goals") \ 1655 \ 1656 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1657 "Adjust tenured generation to achive a minor pause goal") \ 1658 \ 1659 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 1660 "Adjust young generation to achive a major pause goal") \ 1661 \ 1662 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 1663 "Number of steps where heuristics is used before data is used") \ 1664 \ 1665 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 1666 "Number of collections before the adaptive sizing is started") \ 1667 \ 1668 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 1669 "Collecton interval for printing information, zero => never") \ 1670 \ 1671 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 1672 "Use adaptive minimum footprint as a goal") \ 1673 \ 1674 product(uintx, AdaptiveSizePolicyWeight, 10, \ 1675 "Weight given to exponential resizing, between 0 and 100") \ 1676 \ 1677 product(uintx, AdaptiveTimeWeight, 25, \ 1678 "Weight given to time in adaptive policy, between 0 and 100") \ 1679 \ 1680 product(uintx, PausePadding, 1, \ 1681 "How much buffer to keep for pause time") \ 1682 \ 1683 product(uintx, PromotedPadding, 3, \ 1684 "How much buffer to keep for promotion failure") \ 1685 \ 1686 product(uintx, SurvivorPadding, 3, \ 1687 "How much buffer to keep for survivor overflow") \ 1688 \ 1689 product(uintx, AdaptivePermSizeWeight, 20, \ 1690 "Weight for perm gen exponential resizing, between 0 and 100") \ 1691 \ 1692 product(uintx, PermGenPadding, 3, \ 1693 "How much buffer to keep for perm gen sizing") \ 1694 \ 1695 product(uintx, ThresholdTolerance, 10, \ 1696 "Allowed collection cost difference between generations") \ 1697 \ 1698 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 1699 "If collection costs are within margin, reduce both by full delta") \ 1700 \ 1701 product(uintx, YoungGenerationSizeIncrement, 20, \ 1702 "Adaptive size percentage change in young generation") \ 1703 \ 1704 product(uintx, YoungGenerationSizeSupplement, 80, \ 1705 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 1706 \ 1707 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 1708 "Decay factor to YoungedGenerationSizeSupplement") \ 1709 \ 1710 product(uintx, TenuredGenerationSizeIncrement, 20, \ 1711 "Adaptive size percentage change in tenured generation") \ 1712 \ 1713 product(uintx, TenuredGenerationSizeSupplement, 80, \ 1714 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 1715 \ 1716 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 1717 "Decay factor to TenuredGenerationSizeIncrement") \ 1718 \ 1719 product(uintx, MaxGCPauseMillis, max_uintx, \ 1720 "Adaptive size policy maximum GC pause time goal in msec") \ 1721 \ 1722 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 1723 "Adaptive size policy maximum GC minor pause time goal in msec") \ 1724 \ 1725 product(uintx, GCTimeRatio, 99, \ 1726 "Adaptive size policy application time to GC time ratio") \ 1727 \ 1728 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 1729 "Adaptive size scale down factor for shrinking") \ 1730 \ 1731 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 1732 "Adaptive size decays the major cost for long major intervals") \ 1733 \ 1734 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 1735 "Time scale over which major costs decay") \ 1736 \ 1737 product(uintx, MinSurvivorRatio, 3, \ 1738 "Minimum ratio of young generation/survivor space size") \ 1739 \ 1740 product(uintx, InitialSurvivorRatio, 8, \ 1741 "Initial ratio of eden/survivor space size") \ 1742 \ 1743 product(uintx, BaseFootPrintEstimate, 256*M, \ 1744 "Estimate of footprint other than Java Heap") \ 1745 \ 1746 product(bool, UseGCOverheadLimit, true, \ 1747 "Use policy to limit of proportion of time spent in GC " \ 1748 "before an OutOfMemory error is thrown") \ 1749 \ 1750 product(uintx, GCTimeLimit, 98, \ 1751 "Limit of proportion of time spent in GC before an OutOfMemory" \ 1752 "error is thrown (used with GCHeapFreeLimit)") \ 1753 \ 1754 product(uintx, GCHeapFreeLimit, 2, \ 1755 "Minimum percentage of free space after a full GC before an " \ 1756 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 1757 \ 1758 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 1759 "Number of consecutive collections before gc time limit fires") \ 1760 \ 1761 product(bool, PrintAdaptiveSizePolicy, false, \ 1762 "Print information about AdaptiveSizePolicy") \ 1763 \ 1764 product(intx, PrefetchCopyIntervalInBytes, -1, \ 1765 "How far ahead to prefetch destination area (<= 0 means off)") \ 1766 \ 1767 product(intx, PrefetchScanIntervalInBytes, -1, \ 1768 "How far ahead to prefetch scan area (<= 0 means off)") \ 1769 \ 1770 product(intx, PrefetchFieldsAhead, -1, \ 1771 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 1772 \ 1773 develop(bool, UsePrefetchQueue, true, \ 1774 "Use the prefetch queue during PS promotion") \ 1775 \ 1776 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 1777 "Verify system before exiting") \ 1778 \ 1779 diagnostic(bool, VerifyBeforeGC, false, \ 1780 "Verify memory system before GC") \ 1781 \ 1782 diagnostic(bool, VerifyAfterGC, false, \ 1783 "Verify memory system after GC") \ 1784 \ 1785 diagnostic(bool, VerifyDuringGC, false, \ 1786 "Verify memory system during GC (between phases)") \ 1787 \ 1788 diagnostic(bool, VerifyRememberedSets, false, \ 1789 "Verify GC remembered sets") \ 1790 \ 1791 diagnostic(bool, VerifyObjectStartArray, true, \ 1792 "Verify GC object start array if verify before/after") \ 1793 \ 1794 product(bool, DisableExplicitGC, false, \ 1795 "Tells whether calling System.gc() does a full GC") \ 1796 \ 1797 notproduct(bool, CheckMemoryInitialization, false, \ 1798 "Checks memory initialization") \ 1799 \ 1800 product(bool, CollectGen0First, false, \ 1801 "Collect youngest generation before each full GC") \ 1802 \ 1803 diagnostic(bool, BindCMSThreadToCPU, false, \ 1804 "Bind CMS Thread to CPU if possible") \ 1805 \ 1806 diagnostic(uintx, CPUForCMSThread, 0, \ 1807 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 1808 \ 1809 product(bool, BindGCTaskThreadsToCPUs, false, \ 1810 "Bind GCTaskThreads to CPUs if possible") \ 1811 \ 1812 product(bool, UseGCTaskAffinity, false, \ 1813 "Use worker affinity when asking for GCTasks") \ 1814 \ 1815 product(uintx, ProcessDistributionStride, 4, \ 1816 "Stride through processors when distributing processes") \ 1817 \ 1818 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 1819 "number of times the coordinator GC thread will sleep while " \ 1820 "yielding before giving up and resuming GC") \ 1821 \ 1822 product(uintx, CMSYieldSleepCount, 0, \ 1823 "number of times a GC thread (minus the coordinator) " \ 1824 "will sleep while yielding before giving up and resuming GC") \ 1825 \ 1826 notproduct(bool, PrintFlagsFinal, false, \ 1827 "Print all command line flags after argument processing") \ 1828 \ 1829 /* gc tracing */ \ 1830 manageable(bool, PrintGC, false, \ 1831 "Print message at garbage collect") \ 1832 \ 1833 manageable(bool, PrintGCDetails, false, \ 1834 "Print more details at garbage collect") \ 1835 \ 1836 manageable(bool, PrintGCDateStamps, false, \ 1837 "Print date stamps at garbage collect") \ 1838 \ 1839 manageable(bool, PrintGCTimeStamps, false, \ 1840 "Print timestamps at garbage collect") \ 1841 \ 1842 product(bool, PrintGCTaskTimeStamps, false, \ 1843 "Print timestamps for individual gc worker thread tasks") \ 1844 \ 1845 develop(intx, ConcGCYieldTimeout, 0, \ 1846 "If non-zero, assert that GC threads yield within this # of ms.") \ 1847 \ 1848 notproduct(bool, TraceMarkSweep, false, \ 1849 "Trace mark sweep") \ 1850 \ 1851 product(bool, PrintReferenceGC, false, \ 1852 "Print times spent handling reference objects during GC " \ 1853 " (enabled only when PrintGCDetails)") \ 1854 \ 1855 develop(bool, TraceReferenceGC, false, \ 1856 "Trace handling of soft/weak/final/phantom references") \ 1857 \ 1858 develop(bool, TraceFinalizerRegistration, false, \ 1859 "Trace registration of final references") \ 1860 \ 1861 notproduct(bool, TraceScavenge, false, \ 1862 "Trace scavenge") \ 1863 \ 1864 product_rw(bool, TraceClassLoading, false, \ 1865 "Trace all classes loaded") \ 1866 \ 1867 product(bool, TraceClassLoadingPreorder, false, \ 1868 "Trace all classes loaded in order referenced (not loaded)") \ 1869 \ 1870 product_rw(bool, TraceClassUnloading, false, \ 1871 "Trace unloading of classes") \ 1872 \ 1873 product_rw(bool, TraceLoaderConstraints, false, \ 1874 "Trace loader constraints") \ 1875 \ 1876 product(bool, TraceGen0Time, false, \ 1877 "Trace accumulated time for Gen 0 collection") \ 1878 \ 1879 product(bool, TraceGen1Time, false, \ 1880 "Trace accumulated time for Gen 1 collection") \ 1881 \ 1882 product(bool, PrintTenuringDistribution, false, \ 1883 "Print tenuring age information") \ 1884 \ 1885 product_rw(bool, PrintHeapAtGC, false, \ 1886 "Print heap layout before and after each GC") \ 1887 \ 1888 product(bool, PrintHeapAtSIGBREAK, true, \ 1889 "Print heap layout in response to SIGBREAK") \ 1890 \ 1891 manageable(bool, PrintClassHistogram, false, \ 1892 "Print a histogram of class instances") \ 1893 \ 1894 develop(bool, TraceWorkGang, false, \ 1895 "Trace activities of work gangs") \ 1896 \ 1897 product(bool, TraceParallelOldGCTasks, false, \ 1898 "Trace multithreaded GC activity") \ 1899 \ 1900 develop(bool, TraceBlockOffsetTable, false, \ 1901 "Print BlockOffsetTable maps") \ 1902 \ 1903 develop(bool, TraceCardTableModRefBS, false, \ 1904 "Print CardTableModRefBS maps") \ 1905 \ 1906 develop(bool, TraceGCTaskManager, false, \ 1907 "Trace actions of the GC task manager") \ 1908 \ 1909 develop(bool, TraceGCTaskQueue, false, \ 1910 "Trace actions of the GC task queues") \ 1911 \ 1912 develop(bool, TraceGCTaskThread, false, \ 1913 "Trace actions of the GC task threads") \ 1914 \ 1915 product(bool, PrintParallelOldGCPhaseTimes, false, \ 1916 "Print the time taken by each parallel old gc phase." \ 1917 "PrintGCDetails must also be enabled.") \ 1918 \ 1919 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 1920 "Trace parallel old gc marking phase") \ 1921 \ 1922 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 1923 "Trace parallel old gc summary phase") \ 1924 \ 1925 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 1926 "Trace parallel old gc compaction phase") \ 1927 \ 1928 develop(bool, TraceParallelOldGCDensePrefix, false, \ 1929 "Trace parallel old gc dense prefix computation") \ 1930 \ 1931 develop(bool, IgnoreLibthreadGPFault, false, \ 1932 "Suppress workaround for libthread GP fault") \ 1933 \ 1934 product(bool, PrintJNIGCStalls, false, \ 1935 "Print diagnostic message when GC is stalled" \ 1936 "by JNI critical section") \ 1937 \ 1938 /* JVMTI heap profiling */ \ 1939 \ 1940 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 1941 "Trace JVMTI object tagging calls") \ 1942 \ 1943 diagnostic(bool, VerifyBeforeIteration, false, \ 1944 "Verify memory system before JVMTI iteration") \ 1945 \ 1946 /* compiler interface */ \ 1947 \ 1948 develop(bool, CIPrintCompilerName, false, \ 1949 "when CIPrint is active, print the name of the active compiler") \ 1950 \ 1951 develop(bool, CIPrintCompileQueue, false, \ 1952 "display the contents of the compile queue whenever a " \ 1953 "compilation is enqueued") \ 1954 \ 1955 develop(bool, CIPrintRequests, false, \ 1956 "display every request for compilation") \ 1957 \ 1958 product(bool, CITime, false, \ 1959 "collect timing information for compilation") \ 1960 \ 1961 develop(bool, CITimeEach, false, \ 1962 "display timing information after each successful compilation") \ 1963 \ 1964 develop(bool, CICountOSR, true, \ 1965 "use a separate counter when assigning ids to osr compilations") \ 1966 \ 1967 develop(bool, CICompileNatives, true, \ 1968 "compile native methods if supported by the compiler") \ 1969 \ 1970 develop_pd(bool, CICompileOSR, \ 1971 "compile on stack replacement methods if supported by the " \ 1972 "compiler") \ 1973 \ 1974 develop(bool, CIPrintMethodCodes, false, \ 1975 "print method bytecodes of the compiled code") \ 1976 \ 1977 develop(bool, CIPrintTypeFlow, false, \ 1978 "print the results of ciTypeFlow analysis") \ 1979 \ 1980 develop(bool, CITraceTypeFlow, false, \ 1981 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 1982 \ 1983 develop(intx, CICloneLoopTestLimit, 100, \ 1984 "size limit for blocks heuristically cloned in ciTypeFlow") \ 1985 \ 1986 /* temp diagnostics */ \ 1987 \ 1988 diagnostic(bool, TraceRedundantCompiles, false, \ 1989 "Have compile broker print when a request already in the queue is"\ 1990 " requested again") \ 1991 \ 1992 diagnostic(bool, InitialCompileFast, false, \ 1993 "Initial compile at CompLevel_fast_compile") \ 1994 \ 1995 diagnostic(bool, InitialCompileReallyFast, false, \ 1996 "Initial compile at CompLevel_really_fast_compile (no profile)") \ 1997 \ 1998 diagnostic(bool, FullProfileOnReInterpret, true, \ 1999 "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 2000 \ 2001 /* compiler */ \ 2002 \ 2003 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2004 "Number of compiler threads to run") \ 2005 \ 2006 product(intx, CompilationPolicyChoice, 0, \ 2007 "which compilation policy (0/1)") \ 2008 \ 2009 develop(bool, UseStackBanging, true, \ 2010 "use stack banging for stack overflow checks (required for " \ 2011 "proper StackOverflow handling; disable only to measure cost " \ 2012 "of stackbanging)") \ 2013 \ 2014 develop(bool, Use24BitFPMode, true, \ 2015 "Set 24-bit FPU mode on a per-compile basis ") \ 2016 \ 2017 develop(bool, Use24BitFP, true, \ 2018 "use FP instructions that produce 24-bit precise results") \ 2019 \ 2020 develop(bool, UseStrictFP, true, \ 2021 "use strict fp if modifier strictfp is set") \ 2022 \ 2023 develop(bool, GenerateSynchronizationCode, true, \ 2024 "generate locking/unlocking code for synchronized methods and " \ 2025 "monitors") \ 2026 \ 2027 develop(bool, GenerateCompilerNullChecks, true, \ 2028 "Generate explicit null checks for loads/stores/calls") \ 2029 \ 2030 develop(bool, GenerateRangeChecks, true, \ 2031 "Generate range checks for array accesses") \ 2032 \ 2033 develop_pd(bool, ImplicitNullChecks, \ 2034 "generate code for implicit null checks") \ 2035 \ 2036 product(bool, PrintSafepointStatistics, false, \ 2037 "print statistics about safepoint synchronization") \ 2038 \ 2039 product(intx, PrintSafepointStatisticsCount, 300, \ 2040 "total number of safepoint statistics collected " \ 2041 "before printing them out") \ 2042 \ 2043 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2044 "print safepoint statistics only when safepoint takes" \ 2045 " more than PrintSafepointSatisticsTimeout in millis") \ 2046 \ 2047 develop(bool, InlineAccessors, true, \ 2048 "inline accessor methods (get/set)") \ 2049 \ 2050 product(bool, Inline, true, \ 2051 "enable inlining") \ 2052 \ 2053 product(bool, ClipInlining, true, \ 2054 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2055 \ 2056 develop(bool, UseCHA, true, \ 2057 "enable CHA") \ 2058 \ 2059 product(bool, UseTypeProfile, true, \ 2060 "Check interpreter profile for historically monomorphic calls") \ 2061 \ 2062 product(intx, TypeProfileMajorReceiverPercent, 90, \ 2063 "% of major receiver type to all profiled receivers") \ 2064 \ 2065 notproduct(bool, TimeCompiler, false, \ 2066 "time the compiler") \ 2067 \ 2068 notproduct(bool, TimeCompiler2, false, \ 2069 "detailed time the compiler (requires +TimeCompiler)") \ 2070 \ 2071 diagnostic(bool, PrintInlining, false, \ 2072 "prints inlining optimizations") \ 2073 \ 2074 diagnostic(bool, PrintIntrinsics, false, \ 2075 "prints attempted and successful inlining of intrinsics") \ 2076 \ 2077 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2078 "do not expand intrinsics whose (internal) names appear here") \ 2079 \ 2080 develop(bool, StressReflectiveCode, false, \ 2081 "Use inexact types at allocations, etc., to test reflection") \ 2082 \ 2083 develop(bool, EagerInitialization, false, \ 2084 "Eagerly initialize classes if possible") \ 2085 \ 2086 product(bool, Tier1UpdateMethodData, trueInTiered, \ 2087 "Update methodDataOops in Tier1-generated code") \ 2088 \ 2089 develop(bool, TraceMethodReplacement, false, \ 2090 "Print when methods are replaced do to recompilation") \ 2091 \ 2092 develop(bool, PrintMethodFlushing, false, \ 2093 "print the nmethods being flushed") \ 2094 \ 2095 notproduct(bool, LogMultipleMutexLocking, false, \ 2096 "log locking and unlocking of mutexes (only if multiple locks " \ 2097 "are held)") \ 2098 \ 2099 develop(bool, UseRelocIndex, false, \ 2100 "use an index to speed random access to relocations") \ 2101 \ 2102 develop(bool, StressCodeBuffers, false, \ 2103 "Exercise code buffer expansion and other rare state changes") \ 2104 \ 2105 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2106 "Generate extra debugging info for non-safepoints in nmethods") \ 2107 \ 2108 diagnostic(bool, DebugInlinedCalls, true, \ 2109 "If false, restricts profiled locations to the root method only") \ 2110 \ 2111 product(bool, PrintVMOptions, trueInDebug, \ 2112 "print VM flag settings") \ 2113 \ 2114 diagnostic(bool, SerializeVMOutput, true, \ 2115 "Use a mutex to serialize output to tty and hotspot.log") \ 2116 \ 2117 diagnostic(bool, DisplayVMOutput, true, \ 2118 "Display all VM output on the tty, independently of LogVMOutput") \ 2119 \ 2120 diagnostic(bool, LogVMOutput, trueInDebug, \ 2121 "Save VM output to hotspot.log, or to LogFile") \ 2122 \ 2123 diagnostic(ccstr, LogFile, NULL, \ 2124 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2125 \ 2126 product(ccstr, ErrorFile, NULL, \ 2127 "If an error occurs, save the error data to this file " \ 2128 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2129 \ 2130 product(bool, DisplayVMOutputToStderr, false, \ 2131 "If DisplayVMOutput is true, display all VM output to stderr") \ 2132 \ 2133 product(bool, DisplayVMOutputToStdout, false, \ 2134 "If DisplayVMOutput is true, display all VM output to stdout") \ 2135 \ 2136 product(bool, UseHeavyMonitors, false, \ 2137 "use heavyweight instead of lightweight Java monitors") \ 2138 \ 2139 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2140 "print histogram of the symbol table") \ 2141 \ 2142 notproduct(bool, ExitVMOnVerifyError, false, \ 2143 "standard exit from VM if bytecode verify error " \ 2144 "(only in debug mode)") \ 2145 \ 2146 notproduct(ccstr, AbortVMOnException, NULL, \ 2147 "Call fatal if this exception is thrown. Example: " \ 2148 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2149 \ 2150 develop(bool, DebugVtables, false, \ 2151 "add debugging code to vtable dispatch") \ 2152 \ 2153 develop(bool, PrintVtables, false, \ 2154 "print vtables when printing klass") \ 2155 \ 2156 notproduct(bool, PrintVtableStats, false, \ 2157 "print vtables stats at end of run") \ 2158 \ 2159 develop(bool, TraceCreateZombies, false, \ 2160 "trace creation of zombie nmethods") \ 2161 \ 2162 notproduct(bool, IgnoreLockingAssertions, false, \ 2163 "disable locking assertions (for speed)") \ 2164 \ 2165 notproduct(bool, VerifyLoopOptimizations, false, \ 2166 "verify major loop optimizations") \ 2167 \ 2168 product(bool, RangeCheckElimination, true, \ 2169 "Split loop iterations to eliminate range checks") \ 2170 \ 2171 develop_pd(bool, UncommonNullCast, \ 2172 "track occurrences of null in casts; adjust compiler tactics") \ 2173 \ 2174 develop(bool, TypeProfileCasts, true, \ 2175 "treat casts like calls for purposes of type profiling") \ 2176 \ 2177 develop(bool, MonomorphicArrayCheck, true, \ 2178 "Uncommon-trap array store checks that require full type check") \ 2179 \ 2180 develop(bool, DelayCompilationDuringStartup, true, \ 2181 "Delay invoking the compiler until main application class is " \ 2182 "loaded") \ 2183 \ 2184 develop(bool, CompileTheWorld, false, \ 2185 "Compile all methods in all classes in bootstrap class path " \ 2186 "(stress test)") \ 2187 \ 2188 develop(bool, CompileTheWorldPreloadClasses, true, \ 2189 "Preload all classes used by a class before start loading") \ 2190 \ 2191 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ 2192 "Compile all methods although class initializer failed") \ 2193 \ 2194 develop(bool, TraceIterativeGVN, false, \ 2195 "Print progress during Iterative Global Value Numbering") \ 2196 \ 2197 develop(bool, FillDelaySlots, true, \ 2198 "Fill delay slots (on SPARC only)") \ 2199 \ 2200 develop(bool, VerifyIterativeGVN, false, \ 2201 "Verify Def-Use modifications during sparse Iterative Global " \ 2202 "Value Numbering") \ 2203 \ 2204 notproduct(bool, TracePhaseCCP, false, \ 2205 "Print progress during Conditional Constant Propagation") \ 2206 \ 2207 develop(bool, TimeLivenessAnalysis, false, \ 2208 "Time computation of bytecode liveness analysis") \ 2209 \ 2210 develop(bool, TraceLivenessGen, false, \ 2211 "Trace the generation of liveness analysis information") \ 2212 \ 2213 notproduct(bool, TraceLivenessQuery, false, \ 2214 "Trace queries of liveness analysis information") \ 2215 \ 2216 notproduct(bool, CollectIndexSetStatistics, false, \ 2217 "Collect information about IndexSets") \ 2218 \ 2219 develop(bool, PrintDominators, false, \ 2220 "Print out dominator trees for GVN") \ 2221 \ 2222 develop(bool, UseLoopSafepoints, true, \ 2223 "Generate Safepoint nodes in every loop") \ 2224 \ 2225 notproduct(bool, TraceCISCSpill, false, \ 2226 "Trace allocators use of cisc spillable instructions") \ 2227 \ 2228 notproduct(bool, TraceSpilling, false, \ 2229 "Trace spilling") \ 2230 \ 2231 develop(bool, DeutschShiffmanExceptions, true, \ 2232 "Fast check to find exception handler for precisely typed " \ 2233 "exceptions") \ 2234 \ 2235 product(bool, SplitIfBlocks, true, \ 2236 "Clone compares and control flow through merge points to fold " \ 2237 "some branches") \ 2238 \ 2239 develop(intx, FastAllocateSizeLimit, 128*K, \ 2240 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2241 "Inline allocations larger than this in doublewords must go slow")\ 2242 \ 2243 product(bool, AggressiveOpts, false, \ 2244 "Enable aggressive optimizations - see arguments.cpp") \ 2245 \ 2246 /* statistics */ \ 2247 develop(bool, UseVTune, false, \ 2248 "enable support for Intel's VTune profiler") \ 2249 \ 2250 develop(bool, CountCompiledCalls, false, \ 2251 "counts method invocations") \ 2252 \ 2253 notproduct(bool, CountRuntimeCalls, false, \ 2254 "counts VM runtime calls") \ 2255 \ 2256 develop(bool, CountJNICalls, false, \ 2257 "counts jni method invocations") \ 2258 \ 2259 notproduct(bool, CountJVMCalls, false, \ 2260 "counts jvm method invocations") \ 2261 \ 2262 notproduct(bool, CountRemovableExceptions, false, \ 2263 "count exceptions that could be replaced by branches due to " \ 2264 "inlining") \ 2265 \ 2266 notproduct(bool, ICMissHistogram, false, \ 2267 "produce histogram of IC misses") \ 2268 \ 2269 notproduct(bool, PrintClassStatistics, false, \ 2270 "prints class statistics at end of run") \ 2271 \ 2272 notproduct(bool, PrintMethodStatistics, false, \ 2273 "prints method statistics at end of run") \ 2274 \ 2275 /* interpreter */ \ 2276 develop(bool, ClearInterpreterLocals, false, \ 2277 "Always clear local variables of interpreter activations upon " \ 2278 "entry") \ 2279 \ 2280 product_pd(bool, RewriteBytecodes, \ 2281 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2282 \ 2283 product_pd(bool, RewriteFrequentPairs, \ 2284 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2285 \ 2286 diagnostic(bool, PrintInterpreter, false, \ 2287 "Prints the generated interpreter code") \ 2288 \ 2289 product(bool, UseInterpreter, true, \ 2290 "Use interpreter for non-compiled methods") \ 2291 \ 2292 develop(bool, UseFastSignatureHandlers, true, \ 2293 "Use fast signature handlers for native calls") \ 2294 \ 2295 develop(bool, UseV8InstrsOnly, false, \ 2296 "Use SPARC-V8 Compliant instruction subset") \ 2297 \ 2298 product(bool, UseNiagaraInstrs, false, \ 2299 "Use Niagara-efficient instruction subset") \ 2300 \ 2301 develop(bool, UseCASForSwap, false, \ 2302 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2303 \ 2304 product(bool, UseLoopCounter, true, \ 2305 "Increment invocation counter on backward branch") \ 2306 \ 2307 product(bool, UseFastEmptyMethods, true, \ 2308 "Use fast method entry code for empty methods") \ 2309 \ 2310 product(bool, UseFastAccessorMethods, true, \ 2311 "Use fast method entry code for accessor methods") \ 2312 \ 2313 product_pd(bool, UseOnStackReplacement, \ 2314 "Use on stack replacement, calls runtime if invoc. counter " \ 2315 "overflows in loop") \ 2316 \ 2317 notproduct(bool, TraceOnStackReplacement, false, \ 2318 "Trace on stack replacement") \ 2319 \ 2320 develop(bool, PoisonOSREntry, true, \ 2321 "Detect abnormal calls to OSR code") \ 2322 \ 2323 product_pd(bool, PreferInterpreterNativeStubs, \ 2324 "Use always interpreter stubs for native methods invoked via " \ 2325 "interpreter") \ 2326 \ 2327 develop(bool, CountBytecodes, false, \ 2328 "Count number of bytecodes executed") \ 2329 \ 2330 develop(bool, PrintBytecodeHistogram, false, \ 2331 "Print histogram of the executed bytecodes") \ 2332 \ 2333 develop(bool, PrintBytecodePairHistogram, false, \ 2334 "Print histogram of the executed bytecode pairs") \ 2335 \ 2336 diagnostic(bool, PrintSignatureHandlers, false, \ 2337 "Print code generated for native method signature handlers") \ 2338 \ 2339 develop(bool, VerifyOops, false, \ 2340 "Do plausibility checks for oops") \ 2341 \ 2342 develop(bool, CheckUnhandledOops, false, \ 2343 "Check for unhandled oops in VM code") \ 2344 \ 2345 develop(bool, VerifyJNIFields, trueInDebug, \ 2346 "Verify jfieldIDs for instance fields") \ 2347 \ 2348 notproduct(bool, VerifyJNIEnvThread, false, \ 2349 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2350 "from JNI") \ 2351 \ 2352 develop(bool, VerifyFPU, false, \ 2353 "Verify FPU state (check for NaN's, etc.)") \ 2354 \ 2355 develop(bool, VerifyThread, false, \ 2356 "Watch the thread register for corruption (SPARC only)") \ 2357 \ 2358 develop(bool, VerifyActivationFrameSize, false, \ 2359 "Verify that activation frame didn't become smaller than its " \ 2360 "minimal size") \ 2361 \ 2362 develop(bool, TraceFrequencyInlining, false, \ 2363 "Trace frequency based inlining") \ 2364 \ 2365 notproduct(bool, TraceTypeProfile, false, \ 2366 "Trace type profile") \ 2367 \ 2368 develop_pd(bool, InlineIntrinsics, \ 2369 "Inline intrinsics that can be statically resolved") \ 2370 \ 2371 product_pd(bool, ProfileInterpreter, \ 2372 "Profile at the bytecode level during interpretation") \ 2373 \ 2374 develop_pd(bool, ProfileTraps, \ 2375 "Profile deoptimization traps at the bytecode level") \ 2376 \ 2377 product(intx, ProfileMaturityPercentage, 20, \ 2378 "number of method invocations/branches (expressed as % of " \ 2379 "CompileThreshold) before using the method's profile") \ 2380 \ 2381 develop(bool, PrintMethodData, false, \ 2382 "Print the results of +ProfileInterpreter at end of run") \ 2383 \ 2384 develop(bool, VerifyDataPointer, trueInDebug, \ 2385 "Verify the method data pointer during interpreter profiling") \ 2386 \ 2387 develop(bool, VerifyCompiledCode, false, \ 2388 "Include miscellaneous runtime verifications in nmethod code; " \ 2389 "off by default because it disturbs nmethod size heuristics.") \ 2390 \ 2391 \ 2392 /* compilation */ \ 2393 product(bool, UseCompiler, true, \ 2394 "use compilation") \ 2395 \ 2396 develop(bool, TraceCompilationPolicy, false, \ 2397 "Trace compilation policy") \ 2398 \ 2399 develop(bool, TimeCompilationPolicy, false, \ 2400 "Time the compilation policy") \ 2401 \ 2402 product(bool, UseCounterDecay, true, \ 2403 "adjust recompilation counters") \ 2404 \ 2405 develop(intx, CounterHalfLifeTime, 30, \ 2406 "half-life time of invocation counters (in secs)") \ 2407 \ 2408 develop(intx, CounterDecayMinIntervalLength, 500, \ 2409 "Min. ms. between invocation of CounterDecay") \ 2410 \ 2411 product(bool, AlwaysCompileLoopMethods, false, \ 2412 "when using recompilation, never interpret methods " \ 2413 "containing loops") \ 2414 \ 2415 product(bool, DontCompileHugeMethods, true, \ 2416 "don't compile methods > HugeMethodLimit") \ 2417 \ 2418 /* Bytecode escape analysis estimation. */ \ 2419 product(bool, EstimateArgEscape, true, \ 2420 "Analyze bytecodes to estimate escape state of arguments") \ 2421 \ 2422 product(intx, BCEATraceLevel, 0, \ 2423 "How much tracing to do of bytecode escape analysis estimates") \ 2424 \ 2425 product(intx, MaxBCEAEstimateLevel, 5, \ 2426 "Maximum number of nested calls that are analyzed by BC EA.") \ 2427 \ 2428 product(intx, MaxBCEAEstimateSize, 150, \ 2429 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2430 \ 2431 product(intx, AllocatePrefetchStyle, 1, \ 2432 "0 = no prefetch, " \ 2433 "1 = prefetch instructions for each allocation, " \ 2434 "2 = use TLAB watermark to gate allocation prefetch") \ 2435 \ 2436 product(intx, AllocatePrefetchDistance, -1, \ 2437 "Distance to prefetch ahead of allocation pointer") \ 2438 \ 2439 product(intx, AllocatePrefetchLines, 1, \ 2440 "Number of lines to prefetch ahead of allocation pointer") \ 2441 \ 2442 product(intx, AllocatePrefetchStepSize, 16, \ 2443 "Step size in bytes of sequential prefetch instructions") \ 2444 \ 2445 product(intx, AllocatePrefetchInstr, 0, \ 2446 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2447 \ 2448 product(intx, ReadPrefetchInstr, 0, \ 2449 "Prefetch instruction to prefetch ahead") \ 2450 \ 2451 /* deoptimization */ \ 2452 develop(bool, TraceDeoptimization, false, \ 2453 "Trace deoptimization") \ 2454 \ 2455 develop(bool, DebugDeoptimization, false, \ 2456 "Tracing various information while debugging deoptimization") \ 2457 \ 2458 product(intx, SelfDestructTimer, 0, \ 2459 "Will cause VM to terminate after a given time (in minutes) " \ 2460 "(0 means off)") \ 2461 \ 2462 product(intx, MaxJavaStackTraceDepth, 1024, \ 2463 "Max. no. of lines in the stack trace for Java exceptions " \ 2464 "(0 means all)") \ 2465 \ 2466 develop(intx, GuaranteedSafepointInterval, 1000, \ 2467 "Guarantee a safepoint (at least) every so many milliseconds " \ 2468 "(0 means none)") \ 2469 \ 2470 product(intx, SafepointTimeoutDelay, 10000, \ 2471 "Delay in milliseconds for option SafepointTimeout") \ 2472 \ 2473 product(intx, NmethodSweepFraction, 4, \ 2474 "Number of invocations of sweeper to cover all nmethods") \ 2475 \ 2476 notproduct(intx, MemProfilingInterval, 500, \ 2477 "Time between each invocation of the MemProfiler") \ 2478 \ 2479 develop(intx, MallocCatchPtr, -1, \ 2480 "Hit breakpoint when mallocing/freeing this pointer") \ 2481 \ 2482 notproduct(intx, AssertRepeat, 1, \ 2483 "number of times to evaluate expression in assert " \ 2484 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2485 \ 2486 notproduct(ccstrlist, SuppressErrorAt, "", \ 2487 "List of assertions (file:line) to muzzle") \ 2488 \ 2489 notproduct(uintx, HandleAllocationLimit, 1024, \ 2490 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2491 "is used") \ 2492 \ 2493 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2494 "Threshold for total handle allocation when " \ 2495 "+TraceHandleAllocation is used") \ 2496 \ 2497 develop(intx, StackPrintLimit, 100, \ 2498 "number of stack frames to print in VM-level stack dump") \ 2499 \ 2500 notproduct(intx, MaxElementPrintSize, 256, \ 2501 "maximum number of elements to print") \ 2502 \ 2503 notproduct(intx, MaxSubklassPrintSize, 4, \ 2504 "maximum number of subklasses to print when printing klass") \ 2505 \ 2506 develop(intx, MaxInlineLevel, 9, \ 2507 "maximum number of nested calls that are inlined") \ 2508 \ 2509 develop(intx, MaxRecursiveInlineLevel, 1, \ 2510 "maximum number of nested recursive calls that are inlined") \ 2511 \ 2512 develop(intx, InlineSmallCode, 1000, \ 2513 "Only inline already compiled methods if their code size is " \ 2514 "less than this") \ 2515 \ 2516 product(intx, MaxInlineSize, 35, \ 2517 "maximum bytecode size of a method to be inlined") \ 2518 \ 2519 product_pd(intx, FreqInlineSize, \ 2520 "maximum bytecode size of a frequent method to be inlined") \ 2521 \ 2522 develop(intx, MaxTrivialSize, 6, \ 2523 "maximum bytecode size of a trivial method to be inlined") \ 2524 \ 2525 develop(intx, MinInliningThreshold, 250, \ 2526 "min. invocation count a method needs to have to be inlined") \ 2527 \ 2528 develop(intx, AlignEntryCode, 4, \ 2529 "aligns entry code to specified value (in bytes)") \ 2530 \ 2531 develop(intx, MethodHistogramCutoff, 100, \ 2532 "cutoff value for method invoc. histogram (+CountCalls)") \ 2533 \ 2534 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2535 "# of interpreted methods to show in profile") \ 2536 \ 2537 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2538 "# of compiled methods to show in profile") \ 2539 \ 2540 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2541 "# of stub methods to show in profile") \ 2542 \ 2543 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2544 "# of runtime stub nodes to show in profile") \ 2545 \ 2546 product(intx, ProfileIntervalsTicks, 100, \ 2547 "# of ticks between printing of interval profile " \ 2548 "(+ProfileIntervals)") \ 2549 \ 2550 notproduct(intx, ScavengeALotInterval, 1, \ 2551 "Interval between which scavenge will occur with +ScavengeALot") \ 2552 \ 2553 notproduct(intx, FullGCALotInterval, 1, \ 2554 "Interval between which full gc will occur with +FullGCALot") \ 2555 \ 2556 notproduct(intx, FullGCALotStart, 0, \ 2557 "For which invocation to start FullGCAlot") \ 2558 \ 2559 notproduct(intx, FullGCALotDummies, 32*K, \ 2560 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2561 "to move") \ 2562 \ 2563 develop(intx, DontYieldALotInterval, 10, \ 2564 "Interval between which yields will be dropped (milliseconds)") \ 2565 \ 2566 develop(intx, MinSleepInterval, 1, \ 2567 "Minimum sleep() interval (milliseconds) when " \ 2568 "ConvertSleepToYield is off (used for SOLARIS)") \ 2569 \ 2570 product(intx, EventLogLength, 2000, \ 2571 "maximum nof events in event log") \ 2572 \ 2573 develop(intx, ProfilerPCTickThreshold, 15, \ 2574 "Number of ticks in a PC buckets to be a hotspot") \ 2575 \ 2576 notproduct(intx, DeoptimizeALotInterval, 5, \ 2577 "Number of exits until DeoptimizeALot kicks in") \ 2578 \ 2579 notproduct(intx, ZombieALotInterval, 5, \ 2580 "Number of exits until ZombieALot kicks in") \ 2581 \ 2582 develop(bool, StressNonEntrant, false, \ 2583 "Mark nmethods non-entrant at registration") \ 2584 \ 2585 diagnostic(intx, MallocVerifyInterval, 0, \ 2586 "if non-zero, verify C heap after every N calls to " \ 2587 "malloc/realloc/free") \ 2588 \ 2589 diagnostic(intx, MallocVerifyStart, 0, \ 2590 "if non-zero, start verifying C heap after Nth call to " \ 2591 "malloc/realloc/free") \ 2592 \ 2593 product(intx, TypeProfileWidth, 2, \ 2594 "number of receiver types to record in call/cast profile") \ 2595 \ 2596 develop(intx, BciProfileWidth, 2, \ 2597 "number of return bci's to record in ret profile") \ 2598 \ 2599 product(intx, PerMethodRecompilationCutoff, 400, \ 2600 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2601 \ 2602 product(intx, PerBytecodeRecompilationCutoff, 100, \ 2603 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2604 \ 2605 product(intx, PerMethodTrapLimit, 100, \ 2606 "Limit on traps (of one kind) in a method (includes inlines)") \ 2607 \ 2608 product(intx, PerBytecodeTrapLimit, 4, \ 2609 "Limit on traps (of one kind) at a particular BCI") \ 2610 \ 2611 develop(intx, FreqCountInvocations, 1, \ 2612 "Scaling factor for branch frequencies (deprecated)") \ 2613 \ 2614 develop(intx, InlineFrequencyRatio, 20, \ 2615 "Ratio of call site execution to caller method invocation") \ 2616 \ 2617 develop_pd(intx, InlineFrequencyCount, \ 2618 "Count of call site execution necessary to trigger frequent " \ 2619 "inlining") \ 2620 \ 2621 develop(intx, InlineThrowCount, 50, \ 2622 "Force inlining of interpreted methods that throw this often") \ 2623 \ 2624 develop(intx, InlineThrowMaxSize, 200, \ 2625 "Force inlining of throwing methods smaller than this") \ 2626 \ 2627 product(intx, AliasLevel, 3, \ 2628 "0 for no aliasing, 1 for oop/field/static/array split, " \ 2629 "2 for class split, 3 for unique instances") \ 2630 \ 2631 develop(bool, VerifyAliases, false, \ 2632 "perform extra checks on the results of alias analysis") \ 2633 \ 2634 develop(intx, ProfilerNodeSize, 1024, \ 2635 "Size in K to allocate for the Profile Nodes of each thread") \ 2636 \ 2637 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 2638 "Number of times to spin wait on a v8 atomic operation lock") \ 2639 \ 2640 product(intx, ReadSpinIterations, 100, \ 2641 "Number of read attempts before a yield (spin inner loop)") \ 2642 \ 2643 product_pd(intx, PreInflateSpin, \ 2644 "Number of times to spin wait before inflation") \ 2645 \ 2646 product(intx, PreBlockSpin, 10, \ 2647 "Number of times to spin in an inflated lock before going to " \ 2648 "an OS lock") \ 2649 \ 2650 /* gc parameters */ \ 2651 product(uintx, MaxHeapSize, ScaleForWordSize(64*M), \ 2652 "Default maximum size for object heap (in bytes)") \ 2653 \ 2654 product_pd(uintx, NewSize, \ 2655 "Default size of new generation (in bytes)") \ 2656 \ 2657 product(uintx, MaxNewSize, max_uintx, \ 2658 "Maximum size of new generation (in bytes)") \ 2659 \ 2660 product(uintx, PretenureSizeThreshold, 0, \ 2661 "Max size in bytes of objects allocated in DefNew generation") \ 2662 \ 2663 product_pd(uintx, TLABSize, \ 2664 "Default (or starting) size of TLAB (in bytes)") \ 2665 \ 2666 product(uintx, MinTLABSize, 2*K, \ 2667 "Minimum allowed TLAB size (in bytes)") \ 2668 \ 2669 product(uintx, TLABAllocationWeight, 35, \ 2670 "Allocation averaging weight") \ 2671 \ 2672 product(uintx, TLABWasteTargetPercent, 1, \ 2673 "Percentage of Eden that can be wasted") \ 2674 \ 2675 product(uintx, TLABRefillWasteFraction, 64, \ 2676 "Max TLAB waste at a refill (internal fragmentation)") \ 2677 \ 2678 product(uintx, TLABWasteIncrement, 4, \ 2679 "Increment allowed waste at slow allocation") \ 2680 \ 2681 product_pd(intx, SurvivorRatio, \ 2682 "Ratio of eden/survivor space size") \ 2683 \ 2684 product_pd(intx, NewRatio, \ 2685 "Ratio of new/old generation sizes") \ 2686 \ 2687 product(uintx, MaxLiveObjectEvacuationRatio, 100, \ 2688 "Max percent of eden objects that will be live at scavenge") \ 2689 \ 2690 product_pd(uintx, NewSizeThreadIncrease, \ 2691 "Additional size added to desired new generation size per " \ 2692 "non-daemon thread (in bytes)") \ 2693 \ 2694 product(uintx, OldSize, ScaleForWordSize(4096*K), \ 2695 "Default size of tenured generation (in bytes)") \ 2696 \ 2697 product_pd(uintx, PermSize, \ 2698 "Default size of permanent generation (in bytes)") \ 2699 \ 2700 product_pd(uintx, MaxPermSize, \ 2701 "Maximum size of permanent generation (in bytes)") \ 2702 \ 2703 product(uintx, MinHeapFreeRatio, 40, \ 2704 "Min percentage of heap free after GC to avoid expansion") \ 2705 \ 2706 product(uintx, MaxHeapFreeRatio, 70, \ 2707 "Max percentage of heap free after GC to avoid shrinking") \ 2708 \ 2709 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 2710 "Number of milliseconds per MB of free space in the heap") \ 2711 \ 2712 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 2713 "Min change in heap space due to GC (in bytes)") \ 2714 \ 2715 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 2716 "Min expansion of permanent heap (in bytes)") \ 2717 \ 2718 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 2719 "Max expansion of permanent heap without full GC (in bytes)") \ 2720 \ 2721 product(intx, QueuedAllocationWarningCount, 0, \ 2722 "Number of times an allocation that queues behind a GC " \ 2723 "will retry before printing a warning") \ 2724 \ 2725 diagnostic(uintx, VerifyGCStartAt, 0, \ 2726 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 2727 \ 2728 diagnostic(intx, VerifyGCLevel, 0, \ 2729 "Generation level at which to start +VerifyBefore/AfterGC") \ 2730 \ 2731 develop(uintx, ExitAfterGCNum, 0, \ 2732 "If non-zero, exit after this GC.") \ 2733 \ 2734 product(intx, MaxTenuringThreshold, 15, \ 2735 "Maximum value for tenuring threshold") \ 2736 \ 2737 product(intx, InitialTenuringThreshold, 7, \ 2738 "Initial value for tenuring threshold") \ 2739 \ 2740 product(intx, TargetSurvivorRatio, 50, \ 2741 "Desired percentage of survivor space used after scavenge") \ 2742 \ 2743 product(intx, MarkSweepDeadRatio, 5, \ 2744 "Percentage (0-100) of the old gen allowed as dead wood." \ 2745 "Serial mark sweep treats this as both the min and max value." \ 2746 "CMS uses this value only if it falls back to mark sweep." \ 2747 "Par compact uses a variable scale based on the density of the" \ 2748 "generation and treats this as the max value when the heap is" \ 2749 "either completely full or completely empty. Par compact also" \ 2750 "has a smaller default value; see arguments.cpp.") \ 2751 \ 2752 product(intx, PermMarkSweepDeadRatio, 20, \ 2753 "Percentage (0-100) of the perm gen allowed as dead wood." \ 2754 "See MarkSweepDeadRatio for collector-specific comments.") \ 2755 \ 2756 product(intx, MarkSweepAlwaysCompactCount, 4, \ 2757 "How often should we fully compact the heap (ignoring the dead " \ 2758 "space parameters)") \ 2759 \ 2760 product(intx, PrintCMSStatistics, 0, \ 2761 "Statistics for CMS") \ 2762 \ 2763 product(bool, PrintCMSInitiationStatistics, false, \ 2764 "Statistics for initiating a CMS collection") \ 2765 \ 2766 product(intx, PrintFLSStatistics, 0, \ 2767 "Statistics for CMS' FreeListSpace") \ 2768 \ 2769 product(intx, PrintFLSCensus, 0, \ 2770 "Census for CMS' FreeListSpace") \ 2771 \ 2772 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 2773 "Delay in ms between expansion and allocation") \ 2774 \ 2775 product(intx, DeferThrSuspendLoopCount, 4000, \ 2776 "(Unstable) Number of times to iterate in safepoint loop " \ 2777 " before blocking VM threads ") \ 2778 \ 2779 product(intx, DeferPollingPageLoopCount, -1, \ 2780 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 2781 "before changing safepoint polling page to RO ") \ 2782 \ 2783 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 2784 \ 2785 product(bool, UseDepthFirstScavengeOrder, true, \ 2786 "true: the scavenge order will be depth-first, " \ 2787 "false: the scavenge order will be breadth-first") \ 2788 \ 2789 product(bool, PSChunkLargeArrays, true, \ 2790 "true: process large arrays in chunks") \ 2791 \ 2792 product(uintx, GCDrainStackTargetSize, 64, \ 2793 "how many entries we'll try to leave on the stack during " \ 2794 "parallel GC") \ 2795 \ 2796 /* stack parameters */ \ 2797 product_pd(intx, StackYellowPages, \ 2798 "Number of yellow zone (recoverable overflows) pages") \ 2799 \ 2800 product_pd(intx, StackRedPages, \ 2801 "Number of red zone (unrecoverable overflows) pages") \ 2802 \ 2803 product_pd(intx, StackShadowPages, \ 2804 "Number of shadow zone (for overflow checking) pages" \ 2805 " this should exceed the depth of the VM and native call stack") \ 2806 \ 2807 product_pd(intx, ThreadStackSize, \ 2808 "Thread Stack Size (in Kbytes)") \ 2809 \ 2810 product_pd(intx, VMThreadStackSize, \ 2811 "Non-Java Thread Stack Size (in Kbytes)") \ 2812 \ 2813 product_pd(intx, CompilerThreadStackSize, \ 2814 "Compiler Thread Stack Size (in Kbytes)") \ 2815 \ 2816 develop_pd(uintx, JVMInvokeMethodSlack, \ 2817 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 2818 \ 2819 product(uintx, ThreadSafetyMargin, 50*M, \ 2820 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 2821 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 2822 "disable this feature") \ 2823 \ 2824 /* code cache parameters */ \ 2825 develop(uintx, CodeCacheSegmentSize, 64, \ 2826 "Code cache segment size (in bytes) - smallest unit of " \ 2827 "allocation") \ 2828 \ 2829 develop_pd(intx, CodeEntryAlignment, \ 2830 "Code entry alignment for generated code (in bytes)") \ 2831 \ 2832 product_pd(uintx, InitialCodeCacheSize, \ 2833 "Initial code cache size (in bytes)") \ 2834 \ 2835 product_pd(uintx, ReservedCodeCacheSize, \ 2836 "Reserved code cache size (in bytes) - maximum code cache size") \ 2837 \ 2838 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 2839 "When less than X space left, we stop compiling.") \ 2840 \ 2841 product_pd(uintx, CodeCacheExpansionSize, \ 2842 "Code cache expansion size (in bytes)") \ 2843 \ 2844 develop_pd(uintx, CodeCacheMinBlockLength, \ 2845 "Minimum number of segments in a code cache block.") \ 2846 \ 2847 notproduct(bool, ExitOnFullCodeCache, false, \ 2848 "Exit the VM if we fill the code cache.") \ 2849 \ 2850 /* interpreter debugging */ \ 2851 develop(intx, BinarySwitchThreshold, 5, \ 2852 "Minimal number of lookupswitch entries for rewriting to binary " \ 2853 "switch") \ 2854 \ 2855 develop(intx, StopInterpreterAt, 0, \ 2856 "Stops interpreter execution at specified bytecode number") \ 2857 \ 2858 develop(intx, TraceBytecodesAt, 0, \ 2859 "Traces bytecodes starting with specified bytecode number") \ 2860 \ 2861 /* compiler interface */ \ 2862 develop(intx, CIStart, 0, \ 2863 "the id of the first compilation to permit") \ 2864 \ 2865 develop(intx, CIStop, -1, \ 2866 "the id of the last compilation to permit") \ 2867 \ 2868 develop(intx, CIStartOSR, 0, \ 2869 "the id of the first osr compilation to permit " \ 2870 "(CICountOSR must be on)") \ 2871 \ 2872 develop(intx, CIStopOSR, -1, \ 2873 "the id of the last osr compilation to permit " \ 2874 "(CICountOSR must be on)") \ 2875 \ 2876 develop(intx, CIBreakAtOSR, -1, \ 2877 "id of osr compilation to break at") \ 2878 \ 2879 develop(intx, CIBreakAt, -1, \ 2880 "id of compilation to break at") \ 2881 \ 2882 product(ccstrlist, CompileOnly, "", \ 2883 "List of methods (pkg/class.name) to restrict compilation to") \ 2884 \ 2885 product(ccstr, CompileCommandFile, NULL, \ 2886 "Read compiler commands from this file [.hotspot_compiler]") \ 2887 \ 2888 product(ccstrlist, CompileCommand, "", \ 2889 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 2890 \ 2891 product(bool, CICompilerCountPerCPU, false, \ 2892 "1 compiler thread for log(N CPUs)") \ 2893 \ 2894 develop(intx, CIFireOOMAt, -1, \ 2895 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 2896 "(non-negative value throws OOM after this many CI accesses " \ 2897 "in each compile)") \ 2898 \ 2899 develop(intx, CIFireOOMAtDelay, -1, \ 2900 "Wait for this many CI accesses to occur in all compiles before " \ 2901 "beginning to throw OutOfMemoryErrors in each compile") \ 2902 \ 2903 /* Priorities */ \ 2904 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 2905 \ 2906 product(intx, ThreadPriorityPolicy, 0, \ 2907 "0 : Normal. "\ 2908 " VM chooses priorities that are appropriate for normal "\ 2909 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 2910 " to normal native priority. Java priorities below NORM_PRIORITY"\ 2911 " map to lower native priority values. On Windows applications"\ 2912 " are allowed to use higher native priorities. However, with "\ 2913 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 2914 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 2915 " interfere with system threads. On Linux thread priorities "\ 2916 " are ignored because the OS does not support static priority "\ 2917 " in SCHED_OTHER scheduling class which is the only choice for"\ 2918 " non-root, non-realtime applications. "\ 2919 "1 : Aggressive. "\ 2920 " Java thread priorities map over to the entire range of "\ 2921 " native thread priorities. Higher Java thread priorities map "\ 2922 " to higher native thread priorities. This policy should be "\ 2923 " used with care, as sometimes it can cause performance "\ 2924 " degradation in the application and/or the entire system. On "\ 2925 " Linux this policy requires root privilege.") \ 2926 \ 2927 product(bool, ThreadPriorityVerbose, false, \ 2928 "print priority changes") \ 2929 \ 2930 product(intx, DefaultThreadPriority, -1, \ 2931 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ 2932 \ 2933 product(intx, CompilerThreadPriority, -1, \ 2934 "what priority should compiler threads run at (-1 means no change)") \ 2935 \ 2936 product(intx, VMThreadPriority, -1, \ 2937 "what priority should VM threads run at (-1 means no change)") \ 2938 \ 2939 product(bool, CompilerThreadHintNoPreempt, true, \ 2940 "(Solaris only) Give compiler threads an extra quanta") \ 2941 \ 2942 product(bool, VMThreadHintNoPreempt, false, \ 2943 "(Solaris only) Give VM thread an extra quanta") \ 2944 \ 2945 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2946 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2947 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2948 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2949 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2950 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2951 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2952 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2953 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 2954 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 2955 \ 2956 /* compiler debugging */ \ 2957 notproduct(intx, CompileTheWorldStartAt, 1, \ 2958 "First class to consider when using +CompileTheWorld") \ 2959 \ 2960 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 2961 "Last class to consider when using +CompileTheWorld") \ 2962 \ 2963 develop(intx, NewCodeParameter, 0, \ 2964 "Testing Only: Create a dedicated integer parameter before " \ 2965 "putback") \ 2966 \ 2967 /* new oopmap storage allocation */ \ 2968 develop(intx, MinOopMapAllocation, 8, \ 2969 "Minimum number of OopMap entries in an OopMapSet") \ 2970 \ 2971 /* Background Compilation */ \ 2972 develop(intx, LongCompileThreshold, 50, \ 2973 "Used with +TraceLongCompiles") \ 2974 \ 2975 product(intx, StarvationMonitorInterval, 200, \ 2976 "Pause between each check in ms") \ 2977 \ 2978 /* recompilation */ \ 2979 product_pd(intx, CompileThreshold, \ 2980 "number of interpreted method invocations before (re-)compiling") \ 2981 \ 2982 product_pd(intx, BackEdgeThreshold, \ 2983 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 2984 \ 2985 product(intx, Tier1BytecodeLimit, 10, \ 2986 "Must have at least this many bytecodes before tier1" \ 2987 "invocation counters are used") \ 2988 \ 2989 product_pd(intx, Tier2CompileThreshold, \ 2990 "threshold at which a tier 2 compilation is invoked") \ 2991 \ 2992 product_pd(intx, Tier2BackEdgeThreshold, \ 2993 "Back edge threshold at which a tier 2 compilation is invoked") \ 2994 \ 2995 product_pd(intx, Tier3CompileThreshold, \ 2996 "threshold at which a tier 3 compilation is invoked") \ 2997 \ 2998 product_pd(intx, Tier3BackEdgeThreshold, \ 2999 "Back edge threshold at which a tier 3 compilation is invoked") \ 3000 \ 3001 product_pd(intx, Tier4CompileThreshold, \ 3002 "threshold at which a tier 4 compilation is invoked") \ 3003 \ 3004 product_pd(intx, Tier4BackEdgeThreshold, \ 3005 "Back edge threshold at which a tier 4 compilation is invoked") \ 3006 \ 3007 product_pd(bool, TieredCompilation, \ 3008 "Enable two-tier compilation") \ 3009 \ 3010 product(bool, StressTieredRuntime, false, \ 3011 "Alternate client and server compiler on compile requests") \ 3012 \ 3013 product_pd(intx, OnStackReplacePercentage, \ 3014 "NON_TIERED number of method invocations/branches (expressed as %"\ 3015 "of CompileThreshold) before (re-)compiling OSR code") \ 3016 \ 3017 product(intx, InterpreterProfilePercentage, 33, \ 3018 "NON_TIERED number of method invocations/branches (expressed as %"\ 3019 "of CompileThreshold) before profiling in the interpreter") \ 3020 \ 3021 develop(intx, MaxRecompilationSearchLength, 10, \ 3022 "max. # frames to inspect searching for recompilee") \ 3023 \ 3024 develop(intx, MaxInterpretedSearchLength, 3, \ 3025 "max. # interp. frames to skip when searching for recompilee") \ 3026 \ 3027 develop(intx, DesiredMethodLimit, 8000, \ 3028 "desired max. method size (in bytecodes) after inlining") \ 3029 \ 3030 develop(intx, HugeMethodLimit, 8000, \ 3031 "don't compile methods larger than this if " \ 3032 "+DontCompileHugeMethods") \ 3033 \ 3034 /* New JDK 1.4 reflection implementation */ \ 3035 \ 3036 develop(bool, UseNewReflection, true, \ 3037 "Temporary flag for transition to reflection based on dynamic " \ 3038 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3039 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3040 "changes were needed") \ 3041 \ 3042 develop(bool, VerifyReflectionBytecodes, false, \ 3043 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3044 "in situations like that described in 4486457 or for " \ 3045 "constructors generated for serialization, so can not be enabled "\ 3046 "in product.") \ 3047 \ 3048 product(bool, ReflectionWrapResolutionErrors, true, \ 3049 "Temporary flag for transition to AbstractMethodError wrapped " \ 3050 "in InvocationTargetException. See 6531596") \ 3051 \ 3052 \ 3053 develop(intx, FastSuperclassLimit, 8, \ 3054 "Depth of hardwired instanceof accelerator array") \ 3055 \ 3056 /* Properties for Java libraries */ \ 3057 \ 3058 product(intx, MaxDirectMemorySize, -1, \ 3059 "Maximum total size of NIO direct-buffer allocations") \ 3060 \ 3061 /* temporary developer defined flags */ \ 3062 \ 3063 diagnostic(bool, UseNewCode, false, \ 3064 "Testing Only: Use the new version while testing") \ 3065 \ 3066 diagnostic(bool, UseNewCode2, false, \ 3067 "Testing Only: Use the new version while testing") \ 3068 \ 3069 diagnostic(bool, UseNewCode3, false, \ 3070 "Testing Only: Use the new version while testing") \ 3071 \ 3072 /* flags for performance data collection */ \ 3073 \ 3074 product(bool, UsePerfData, true, \ 3075 "Flag to disable jvmstat instrumentation for performance testing" \ 3076 "and problem isolation purposes.") \ 3077 \ 3078 product(bool, PerfDataSaveToFile, false, \ 3079 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3080 \ 3081 product(ccstr, PerfDataSaveFile, NULL, \ 3082 "Save PerfData memory to the specified absolute pathname," \ 3083 "%p in the file name if present will be replaced by pid") \ 3084 \ 3085 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3086 "Data sampling interval in milliseconds") \ 3087 \ 3088 develop(bool, PerfTraceDataCreation, false, \ 3089 "Trace creation of Performance Data Entries") \ 3090 \ 3091 develop(bool, PerfTraceMemOps, false, \ 3092 "Trace PerfMemory create/attach/detach calls") \ 3093 \ 3094 product(bool, PerfDisableSharedMem, false, \ 3095 "Store performance data in standard memory") \ 3096 \ 3097 product(intx, PerfDataMemorySize, 32*K, \ 3098 "Size of performance data memory region. Will be rounded " \ 3099 "up to a multiple of the native os page size.") \ 3100 \ 3101 product(intx, PerfMaxStringConstLength, 1024, \ 3102 "Maximum PerfStringConstant string length before truncation") \ 3103 \ 3104 product(bool, PerfAllowAtExitRegistration, false, \ 3105 "Allow registration of atexit() methods") \ 3106 \ 3107 product(bool, PerfBypassFileSystemCheck, false, \ 3108 "Bypass Win32 file system criteria checks (Windows Only)") \ 3109 \ 3110 product(intx, UnguardOnExecutionViolation, 0, \ 3111 "Unguard page and retry on no-execute fault (Win32 only)" \ 3112 "0=off, 1=conservative, 2=aggressive") \ 3113 \ 3114 /* Serviceability Support */ \ 3115 \ 3116 product(bool, ManagementServer, false, \ 3117 "Create JMX Management Server") \ 3118 \ 3119 product(bool, DisableAttachMechanism, false, \ 3120 "Disable mechanism that allows tools to attach to this VM") \ 3121 \ 3122 product(bool, StartAttachListener, false, \ 3123 "Always start Attach Listener at VM startup") \ 3124 \ 3125 manageable(bool, PrintConcurrentLocks, false, \ 3126 "Print java.util.concurrent locks in thread dump") \ 3127 \ 3128 /* Shared spaces */ \ 3129 \ 3130 product(bool, UseSharedSpaces, true, \ 3131 "Use shared spaces in the permanent generation") \ 3132 \ 3133 product(bool, RequireSharedSpaces, false, \ 3134 "Require shared spaces in the permanent generation") \ 3135 \ 3136 product(bool, ForceSharedSpaces, false, \ 3137 "Require shared spaces in the permanent generation") \ 3138 \ 3139 product(bool, DumpSharedSpaces, false, \ 3140 "Special mode: JVM reads a class list, loads classes, builds " \ 3141 "shared spaces, and dumps the shared spaces to a file to be " \ 3142 "used in future JVM runs.") \ 3143 \ 3144 product(bool, PrintSharedSpaces, false, \ 3145 "Print usage of shared spaces") \ 3146 \ 3147 product(uintx, SharedDummyBlockSize, 512*M, \ 3148 "Size of dummy block used to shift heap addresses (in bytes)") \ 3149 \ 3150 product(uintx, SharedReadWriteSize, 12*M, \ 3151 "Size of read-write space in permanent generation (in bytes)") \ 3152 \ 3153 product(uintx, SharedReadOnlySize, 8*M, \ 3154 "Size of read-only space in permanent generation (in bytes)") \ 3155 \ 3156 product(uintx, SharedMiscDataSize, 4*M, \ 3157 "Size of the shared data area adjacent to the heap (in bytes)") \ 3158 \ 3159 product(uintx, SharedMiscCodeSize, 4*M, \ 3160 "Size of the shared code area adjacent to the heap (in bytes)") \ 3161 \ 3162 diagnostic(bool, SharedOptimizeColdStart, true, \ 3163 "At dump time, order shared objects to achieve better " \ 3164 "cold startup time.") \ 3165 \ 3166 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3167 "Reordering policy for SharedOptimizeColdStart " \ 3168 "0=favor classload-time locality, 1=balanced, " \ 3169 "2=favor runtime locality") \ 3170 \ 3171 diagnostic(bool, SharedSkipVerify, false, \ 3172 "Skip assert() and verify() which page-in unwanted shared " \ 3173 "objects. ") \ 3174 \ 3175 product(bool, TaggedStackInterpreter, false, \ 3176 "Insert tags in interpreter execution stack for oopmap generaion")\ 3177 \ 3178 diagnostic(bool, PauseAtStartup, false, \ 3179 "Causes the VM to pause at startup time and wait for the pause " \ 3180 "file to be removed (default: ./vm.paused.<pid>)") \ 3181 \ 3182 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3183 "The file to create and for whose removal to await when pausing " \ 3184 "at startup. (default: ./vm.paused.<pid>)") \ 3185 \ 3186 product(bool, ExtendedDTraceProbes, false, \ 3187 "Enable performance-impacting dtrace probes") \ 3188 \ 3189 product(bool, DTraceMethodProbes, false, \ 3190 "Enable dtrace probes for method-entry and method-exit") \ 3191 \ 3192 product(bool, DTraceAllocProbes, false, \ 3193 "Enable dtrace probes for object allocation") \ 3194 \ 3195 product(bool, DTraceMonitorProbes, false, \ 3196 "Enable dtrace probes for monitor events") \ 3197 \ 3198 product(bool, RelaxAccessControlCheck, false, \ 3199 "Relax the access control checks in the verifier") \ 3200 \ 3201 diagnostic(bool, PrintDTraceDOF, false, \ 3202 "Print the DTrace DOF passed to the system for JSDT probes") \ 3203 \ 3204 product(bool, UseVMInterruptibleIO, true, \ 3205 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3206 "EINTR for I/O operations results in OS_INTRPT") 3207 3208 3209/* 3210 * Macros for factoring of globals 3211 */ 3212 3213// Interface macros 3214#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3215#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3216#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3217#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3218#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3219#ifdef PRODUCT 3220#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3221#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3222#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3223#else 3224#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3225#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3226#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3227#endif 3228// Special LP64 flags, product only needed for now. 3229#ifdef _LP64 3230#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3231#else 3232#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3233#endif // _LP64 3234 3235// Implementation macros 3236#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3237#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3238#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3239#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3240#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3241#ifdef PRODUCT 3242#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3243#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3244#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3245#else 3246#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3247#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3248#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3249#endif 3250#ifdef _LP64 3251#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3252#else 3253#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3254#endif // _LP64 3255 3256RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG) 3257 3258RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3259