globals.hpp revision 1494:1eb493f33423
1284677Sdim/* 2284677Sdim * Copyright 1997-2010 Sun Microsystems, Inc. All Rights Reserved. 3353358Sdim * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4353358Sdim * 5353358Sdim * This code is free software; you can redistribute it and/or modify it 6284677Sdim * under the terms of the GNU General Public License version 2 only, as 7284677Sdim * published by the Free Software Foundation. 8284677Sdim * 9284677Sdim * This code is distributed in the hope that it will be useful, but WITHOUT 10341825Sdim * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11284677Sdim * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12284677Sdim * version 2 for more details (a copy is included in the LICENSE file that 13284677Sdim * accompanied this code). 14284677Sdim * 15284677Sdim * You should have received a copy of the GNU General Public License version 16284677Sdim * 2 along with this work; if not, write to the Free Software Foundation, 17284677Sdim * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18314564Sdim * 19284677Sdim * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20284677Sdim * CA 95054 USA or visit www.sun.com if you need additional information or 21341825Sdim * have any questions. 22314564Sdim * 23314564Sdim */ 24314564Sdim 25314564Sdim#if !defined(COMPILER1) && !defined(COMPILER2) 26314564Sdimdefine_pd_global(bool, BackgroundCompilation, false); 27314564Sdimdefine_pd_global(bool, UseTLAB, false); 28284677Sdimdefine_pd_global(bool, CICompileOSR, false); 29314564Sdimdefine_pd_global(bool, UseTypeProfile, false); 30314564Sdimdefine_pd_global(bool, UseOnStackReplacement, false); 31314564Sdimdefine_pd_global(bool, InlineIntrinsics, false); 32314564Sdimdefine_pd_global(bool, PreferInterpreterNativeStubs, true); 33314564Sdimdefine_pd_global(bool, ProfileInterpreter, false); 34284677Sdimdefine_pd_global(bool, ProfileTraps, false); 35314564Sdimdefine_pd_global(bool, TieredCompilation, false); 36284677Sdim 37284677Sdimdefine_pd_global(intx, CompileThreshold, 0); 38314564Sdimdefine_pd_global(intx, Tier2CompileThreshold, 0); 39314564Sdimdefine_pd_global(intx, Tier3CompileThreshold, 0); 40360784Sdimdefine_pd_global(intx, Tier4CompileThreshold, 0); 41314564Sdim 42314564Sdimdefine_pd_global(intx, BackEdgeThreshold, 0); 43314564Sdimdefine_pd_global(intx, Tier2BackEdgeThreshold, 0); 44341825Sdimdefine_pd_global(intx, Tier3BackEdgeThreshold, 0); 45360784Sdimdefine_pd_global(intx, Tier4BackEdgeThreshold, 0); 46314564Sdim 47314564Sdimdefine_pd_global(intx, OnStackReplacePercentage, 0); 48314564Sdimdefine_pd_global(bool, ResizeTLAB, false); 49314564Sdimdefine_pd_global(intx, FreqInlineSize, 0); 50314564Sdimdefine_pd_global(intx, InlineSmallCode, 0); 51284677Sdimdefine_pd_global(intx, NewSizeThreadIncrease, 4*K); 52284677Sdimdefine_pd_global(intx, InlineClassNatives, true); 53284677Sdimdefine_pd_global(intx, InlineUnsafeOps, true); 54341825Sdimdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 55341825Sdimdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 56309124Sdimdefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 57309124Sdimdefine_pd_global(intx, CodeCacheMinBlockLength, 1); 58341825Sdimdefine_pd_global(uintx,PermSize, ScaleForWordSize(4*M)); 59341825Sdimdefine_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M)); 60341825Sdimdefine_pd_global(bool, NeverActAsServerClassMachine, true); 61341825Sdimdefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 62341825Sdim#define CI_COMPILER_COUNT 0 63341825Sdim#else 64341825Sdim 65284677Sdim#ifdef COMPILER2 66360784Sdim#define CI_COMPILER_COUNT 2 67360784Sdim#else 68360784Sdim#define CI_COMPILER_COUNT 1 69341825Sdim#endif // COMPILER2 70284677Sdim 71309124Sdim#endif // no compilers 72309124Sdim 73309124Sdim 74309124Sdim// string type aliases used only in this file 75309124Sdimtypedef const char* ccstr; 76309124Sdimtypedef const char* ccstrlist; // represents string arguments which accumulate 77309124Sdim 78309124Sdimenum FlagValueOrigin { 79309124Sdim DEFAULT = 0, 80309124Sdim COMMAND_LINE = 1, 81309124Sdim ENVIRON_VAR = 2, 82309124Sdim CONFIG_FILE = 3, 83309124Sdim MANAGEMENT = 4, 84309124Sdim ERGONOMIC = 5, 85309124Sdim ATTACH_ON_DEMAND = 6, 86309124Sdim INTERNAL = 99 87309124Sdim}; 88309124Sdim 89309124Sdimstruct Flag { 90309124Sdim const char *type; 91309124Sdim const char *name; 92309124Sdim void* addr; 93309124Sdim const char *kind; 94309124Sdim FlagValueOrigin origin; 95309124Sdim 96309124Sdim // points to all Flags static array 97309124Sdim static Flag *flags; 98309124Sdim 99309124Sdim // number of flags 100309124Sdim static size_t numFlags; 101309124Sdim 102309124Sdim static Flag* find_flag(char* name, size_t length); 103309124Sdim 104309124Sdim bool is_bool() const { return strcmp(type, "bool") == 0; } 105309124Sdim bool get_bool() const { return *((bool*) addr); } 106309124Sdim void set_bool(bool value) { *((bool*) addr) = value; } 107309124Sdim 108314564Sdim bool is_intx() const { return strcmp(type, "intx") == 0; } 109314564Sdim intx get_intx() const { return *((intx*) addr); } 110314564Sdim void set_intx(intx value) { *((intx*) addr) = value; } 111314564Sdim 112314564Sdim bool is_uintx() const { return strcmp(type, "uintx") == 0; } 113314564Sdim uintx get_uintx() const { return *((uintx*) addr); } 114314564Sdim void set_uintx(uintx value) { *((uintx*) addr) = value; } 115314564Sdim 116314564Sdim bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; } 117314564Sdim uint64_t get_uint64_t() const { return *((uint64_t*) addr); } 118314564Sdim void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; } 119314564Sdim 120309124Sdim bool is_double() const { return strcmp(type, "double") == 0; } 121309124Sdim double get_double() const { return *((double*) addr); } 122309124Sdim void set_double(double value) { *((double*) addr) = value; } 123309124Sdim 124309124Sdim bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; } 125284677Sdim bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; } 126284677Sdim ccstr get_ccstr() const { return *((ccstr*) addr); } 127284677Sdim void set_ccstr(ccstr value) { *((ccstr*) addr) = value; } 128284677Sdim 129284677Sdim bool is_unlocker() const; 130284677Sdim bool is_unlocked() const; 131284677Sdim bool is_writeable() const; 132284677Sdim bool is_external() const; 133284677Sdim 134284677Sdim void print_on(outputStream* st); 135284677Sdim void print_as_flag(outputStream* st); 136284677Sdim}; 137284677Sdim 138284677Sdim// debug flags control various aspects of the VM and are global accessible 139284677Sdim 140284677Sdim// use FlagSetting to temporarily change some debug flag 141284677Sdim// e.g. FlagSetting fs(DebugThisAndThat, true); 142284677Sdim// restored to previous value upon leaving scope 143284677Sdimclass FlagSetting { 144284677Sdim bool val; 145284677Sdim bool* flag; 146284677Sdim public: 147284677Sdim FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 148284677Sdim ~FlagSetting() { *flag = val; } 149284677Sdim}; 150284677Sdim 151284677Sdim 152284677Sdimclass CounterSetting { 153284677Sdim intx* counter; 154284677Sdim public: 155284677Sdim CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 156341825Sdim ~CounterSetting() { (*counter)--; } 157341825Sdim}; 158341825Sdim 159341825Sdim 160341825Sdimclass IntFlagSetting { 161284677Sdim intx val; 162284677Sdim intx* flag; 163284677Sdim public: 164284677Sdim IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; } 165284677Sdim ~IntFlagSetting() { *flag = val; } 166284677Sdim}; 167309124Sdim 168284677Sdim 169284677Sdimclass DoubleFlagSetting { 170284677Sdim double val; 171284677Sdim double* flag; 172284677Sdim public: 173284677Sdim DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 174284677Sdim ~DoubleFlagSetting() { *flag = val; } 175284677Sdim}; 176284677Sdim 177284677Sdim 178284677Sdimclass CommandLineFlags { 179284677Sdim public: 180284677Sdim static bool boolAt(char* name, size_t len, bool* value); 181284677Sdim static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); } 182284677Sdim static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin); 183284677Sdim static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); } 184284677Sdim 185284677Sdim static bool intxAt(char* name, size_t len, intx* value); 186284677Sdim static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); } 187284677Sdim static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin); 188284677Sdim static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); } 189284677Sdim 190284677Sdim static bool uintxAt(char* name, size_t len, uintx* value); 191284677Sdim static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); } 192284677Sdim static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin); 193284677Sdim static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); } 194284677Sdim 195284677Sdim static bool uint64_tAt(char* name, size_t len, uint64_t* value); 196284677Sdim static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); } 197284677Sdim static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin); 198284677Sdim static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 199284677Sdim 200284677Sdim static bool doubleAt(char* name, size_t len, double* value); 201284677Sdim static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); } 202284677Sdim static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin); 203284677Sdim static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); } 204284677Sdim 205284677Sdim static bool ccstrAt(char* name, size_t len, ccstr* value); 206284677Sdim static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); } 207284677Sdim static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin); 208284677Sdim static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); } 209284677Sdim 210284677Sdim // Returns false if name is not a command line flag. 211284677Sdim static bool wasSetOnCmdline(const char* name, bool* value); 212284677Sdim static void printSetFlags(); 213284677Sdim 214284677Sdim static void printFlags(); 215284677Sdim 216284677Sdim static void verify() PRODUCT_RETURN; 217284677Sdim}; 218284677Sdim 219284677Sdim// use this for flags that are true by default in the debug version but 220284677Sdim// false in the optimized version, and vice versa 221284677Sdim#ifdef ASSERT 222284677Sdim#define trueInDebug true 223284677Sdim#define falseInDebug false 224284677Sdim#else 225327952Sdim#define trueInDebug false 226327952Sdim#define falseInDebug true 227327952Sdim#endif 228327952Sdim 229327952Sdim// use this for flags that are true per default in the product build 230360784Sdim// but false in development builds, and vice versa 231360784Sdim#ifdef PRODUCT 232341825Sdim#define trueInProduct true 233341825Sdim#define falseInProduct false 234341825Sdim#else 235341825Sdim#define trueInProduct false 236341825Sdim#define falseInProduct true 237341825Sdim#endif 238341825Sdim 239341825Sdim// use this for flags that are true per default in the tiered build 240341825Sdim// but false in non-tiered builds, and vice versa 241341825Sdim#ifdef TIERED 242341825Sdim#define trueInTiered true 243341825Sdim#define falseInTiered false 244341825Sdim#else 245341825Sdim#define trueInTiered false 246341825Sdim#define falseInTiered true 247341825Sdim#endif 248341825Sdim 249341825Sdim// develop flags are settable / visible only during development and are constant in the PRODUCT version 250341825Sdim// product flags are always settable / visible 251341825Sdim// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 252341825Sdim 253341825Sdim// A flag must be declared with one of the following types: 254341825Sdim// bool, intx, uintx, ccstr. 255341825Sdim// The type "ccstr" is an alias for "const char*" and is used 256284677Sdim// only in this file, because the macrology requires single-token type names. 257284677Sdim 258284677Sdim// Note: Diagnostic options not meant for VM tuning or for product modes. 259284677Sdim// They are to be used for VM quality assurance or field diagnosis 260284677Sdim// of VM bugs. They are hidden so that users will not be encouraged to 261284677Sdim// try them as if they were VM ordinary execution options. However, they 262284677Sdim// are available in the product version of the VM. Under instruction 263284677Sdim// from support engineers, VM customers can turn them on to collect 264284677Sdim// diagnostic information about VM problems. To use a VM diagnostic 265284677Sdim// option, you must first specify +UnlockDiagnosticVMOptions. 266321369Sdim// (This master switch also affects the behavior of -Xprintflags.) 267321369Sdim// 268321369Sdim// experimental flags are in support of features that are not 269321369Sdim// part of the officially supported product, but are available 270321369Sdim// for experimenting with. They could, for example, be performance 271321369Sdim// features that may not have undergone full or rigorous QA, but which may 272321369Sdim// help performance in some cases and released for experimentation 273321369Sdim// by the community of users and developers. This flag also allows one to 274321369Sdim// be able to build a fully supported product that nonetheless also 275284677Sdim// ships with some unsupported, lightly tested, experimental features. 276309124Sdim// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 277309124Sdim// UnlockExperimentalVMOptions flag, which allows the control and 278309124Sdim// modification of the experimental flags. 279309124Sdim// 280309124Sdim// manageable flags are writeable external product flags. 281309124Sdim// They are dynamically writeable through the JDK management interface 282314564Sdim// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 283284677Sdim// These flags are external exported interface (see CCC). The list of 284284677Sdim// manageable flags can be queried programmatically through the management 285296417Sdim// interface. 286314564Sdim// 287314564Sdim// A flag can be made as "manageable" only if 288341825Sdim// - the flag is defined in a CCC as an external exported interface. 289296417Sdim// - the VM implementation supports dynamic setting of the flag. 290296417Sdim// This implies that the VM must *always* query the flag variable 291309124Sdim// and not reuse state related to the flag state at any given time. 292309124Sdim// - you want the flag to be queried programmatically by the customers. 293309124Sdim// 294314564Sdim// product_rw flags are writeable internal product flags. 295284677Sdim// They are like "manageable" flags but for internal/private use. 296309124Sdim// The list of product_rw flags are internal/private flags which 297341825Sdim// may be changed/removed in a future release. It can be set 298284677Sdim// through the management interface to get/set value 299309124Sdim// when the name of flag is supplied. 300284677Sdim// 301284677Sdim// A flag can be made as "product_rw" only if 302284677Sdim// - the VM implementation supports dynamic setting of the flag. 303309124Sdim// This implies that the VM must *always* query the flag variable 304341825Sdim// and not reuse state related to the flag state at any given time. 305284677Sdim// 306284677Sdim// Note that when there is a need to support develop flags to be writeable, 307284677Sdim// it can be done in the same way as product_rw. 308284677Sdim 309309124Sdim#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \ 310341825Sdim \ 311284677Sdim lp64_product(bool, UseCompressedOops, false, \ 312284677Sdim "Use 32-bit object references in 64-bit VM. " \ 313284677Sdim "lp64_product means flag is always constant in 32 bit VM") \ 314341825Sdim \ 315309124Sdim notproduct(bool, CheckCompressedOops, true, \ 316321369Sdim "generate checks in encoding/decoding code in debug VM") \ 317284677Sdim \ 318284677Sdim product_pd(uintx, HeapBaseMinAddress, \ 319284677Sdim "OS specific low limit for heap base address") \ 320284677Sdim \ 321284677Sdim diagnostic(bool, PrintCompressedOopsMode, false, \ 322284677Sdim "Print compressed oops base address and encoding mode") \ 323341825Sdim \ 324309124Sdim lp64_product(intx, ObjectAlignmentInBytes, 8, \ 325341825Sdim "Default object alignment in bytes, 8 is minimum") \ 326309124Sdim \ 327309124Sdim /* UseMembar is theoretically a temp flag used for memory barrier \ 328284677Sdim * removal testing. It was supposed to be removed before FCS but has \ 329284677Sdim * been re-added (see 6401008) */ \ 330284677Sdim product(bool, UseMembar, false, \ 331341825Sdim "(Unstable) Issues membars on thread state transitions") \ 332309124Sdim \ 333341825Sdim /* Temporary: See 6948537 */ \ 334309124Sdim experimental(bool, UseMemSetInBOT, true, \ 335309124Sdim "(Unstable) uses memset in BOT updates in GC code") \ 336284677Sdim \ 337284677Sdim diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 338284677Sdim "Enable normal processing of flags relating to field diagnostics")\ 339341825Sdim \ 340360784Sdim experimental(bool, UnlockExperimentalVMOptions, false, \ 341360784Sdim "Enable normal processing of flags relating to experimental features")\ 342284677Sdim \ 343309124Sdim product(bool, JavaMonitorsInStackTrace, true, \ 344284677Sdim "Print info. about Java monitor locks when the stacks are dumped")\ 345284677Sdim \ 346284677Sdim product_pd(bool, UseLargePages, \ 347341825Sdim "Use large page memory") \ 348309124Sdim \ 349309124Sdim product_pd(bool, UseLargePagesIndividualAllocation, \ 350309124Sdim "Allocate large pages individually for better affinity") \ 351309124Sdim \ 352309124Sdim develop(bool, LargePagesIndividualAllocationInjectError, false, \ 353284677Sdim "Fail large pages individual allocation") \ 354314564Sdim \ 355341825Sdim develop(bool, TracePageSizes, false, \ 356309124Sdim "Trace page size selection and usage.") \ 357309124Sdim \ 358284677Sdim product(bool, UseNUMA, false, \ 359314564Sdim "Use NUMA if available") \ 360341825Sdim \ 361309124Sdim product(bool, ForceNUMA, false, \ 362309124Sdim "Force NUMA optimizations on single-node/UMA systems") \ 363341825Sdim \ 364341825Sdim product(intx, NUMAChunkResizeWeight, 20, \ 365309124Sdim "Percentage (0-100) used to weight the current sample when " \ 366309124Sdim "computing exponentially decaying average for " \ 367309124Sdim "AdaptiveNUMAChunkSizing") \ 368309124Sdim \ 369314564Sdim product(intx, NUMASpaceResizeRate, 1*G, \ 370341825Sdim "Do not reallocate more that this amount per collection") \ 371309124Sdim \ 372341825Sdim product(bool, UseAdaptiveNUMAChunkSizing, true, \ 373341825Sdim "Enable adaptive chunk sizing for NUMA") \ 374309124Sdim \ 375284677Sdim product(bool, NUMAStats, false, \ 376284677Sdim "Print NUMA stats in detailed heap information") \ 377284677Sdim \ 378341825Sdim product(intx, NUMAPageScanRate, 256, \ 379341825Sdim "Maximum number of pages to include in the page scan procedure") \ 380341825Sdim \ 381309124Sdim product_pd(bool, NeedsDeoptSuspend, \ 382321369Sdim "True for register window machines (sparc/ia64)") \ 383321369Sdim \ 384309124Sdim product(intx, UseSSE, 99, \ 385284677Sdim "Highest supported SSE instructions set on x86/x64") \ 386314564Sdim \ 387341825Sdim product(uintx, LargePageSizeInBytes, 0, \ 388309124Sdim "Large page size (0 to let VM choose the page size") \ 389321369Sdim \ 390321369Sdim product(uintx, LargePageHeapSizeThreshold, 128*M, \ 391321369Sdim "Use large pages if max heap is at least this big") \ 392309124Sdim \ 393296417Sdim product(bool, ForceTimeHighResolution, false, \ 394284677Sdim "Using high time resolution(For Win32 only)") \ 395341825Sdim \ 396341825Sdim develop(bool, TraceItables, false, \ 397321369Sdim "Trace initialization and use of itables") \ 398309124Sdim \ 399284677Sdim develop(bool, TracePcPatching, false, \ 400341825Sdim "Trace usage of frame::patch_pc") \ 401284677Sdim \ 402341825Sdim develop(bool, TraceJumps, false, \ 403341825Sdim "Trace assembly jumps in thread ring buffer") \ 404321369Sdim \ 405341825Sdim develop(bool, TraceRelocator, false, \ 406309124Sdim "Trace the bytecode relocator") \ 407309124Sdim \ 408341825Sdim develop(bool, TraceLongCompiles, false, \ 409321369Sdim "Print out every time compilation is longer than " \ 410341825Sdim "a given threashold") \ 411284677Sdim \ 412284677Sdim develop(bool, SafepointALot, false, \ 413284677Sdim "Generates a lot of safepoints. Works with " \ 414341825Sdim "GuaranteedSafepointInterval") \ 415284677Sdim \ 416341825Sdim product_pd(bool, BackgroundCompilation, \ 417341825Sdim "A thread requesting compilation is not blocked during " \ 418321369Sdim "compilation") \ 419341825Sdim \ 420284677Sdim product(bool, PrintVMQWaitTime, false, \ 421309124Sdim "Prints out the waiting time in VM operation queue") \ 422341825Sdim \ 423321369Sdim develop(bool, BailoutToInterpreterForThrows, false, \ 424341825Sdim "Compiled methods which throws/catches exceptions will be " \ 425284677Sdim "deopt and intp.") \ 426284677Sdim \ 427284677Sdim develop(bool, NoYieldsInMicrolock, false, \ 428341825Sdim "Disable yields in microlock") \ 429341825Sdim \ 430284677Sdim develop(bool, TraceOopMapGeneration, false, \ 431284677Sdim "Shows oopmap generation") \ 432309124Sdim \ 433284677Sdim product(bool, MethodFlushing, true, \ 434284677Sdim "Reclamation of zombie and not-entrant methods") \ 435284677Sdim \ 436341825Sdim develop(bool, VerifyStack, false, \ 437341825Sdim "Verify stack of each thread when it is entering a runtime call") \ 438284677Sdim \ 439284677Sdim develop(bool, ForceUnreachable, false, \ 440284677Sdim "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \ 441284677Sdim \ 442284677Sdim notproduct(bool, StressDerivedPointers, false, \ 443284677Sdim "Force scavenge when a derived pointers is detected on stack " \ 444284677Sdim "after rtm call") \ 445284677Sdim \ 446296417Sdim develop(bool, TraceDerivedPointers, false, \ 447284677Sdim "Trace traversal of derived pointers on stack") \ 448284677Sdim \ 449341825Sdim notproduct(bool, TraceCodeBlobStacks, false, \ 450309124Sdim "Trace stack-walk of codeblobs") \ 451321369Sdim \ 452321369Sdim product(bool, PrintJNIResolving, false, \ 453321369Sdim "Used to implement -v:jni") \ 454321369Sdim \ 455321369Sdim notproduct(bool, PrintRewrites, false, \ 456321369Sdim "Print methods that are being rewritten") \ 457321369Sdim \ 458309124Sdim product(bool, UseInlineCaches, true, \ 459309124Sdim "Use Inline Caches for virtual calls ") \ 460284677Sdim \ 461284677Sdim develop(bool, InlineArrayCopy, true, \ 462341825Sdim "inline arraycopy native that is known to be part of " \ 463284677Sdim "base library DLL") \ 464284677Sdim \ 465284677Sdim develop(bool, InlineObjectHash, true, \ 466284677Sdim "inline Object::hashCode() native that is known to be part " \ 467309124Sdim "of base library DLL") \ 468284677Sdim \ 469284677Sdim develop(bool, InlineObjectCopy, true, \ 470284677Sdim "inline Object.clone and Arrays.copyOf[Range] intrinsics") \ 471284677Sdim \ 472284677Sdim develop(bool, InlineNatives, true, \ 473284677Sdim "inline natives that are known to be part of base library DLL") \ 474284677Sdim \ 475284677Sdim develop(bool, InlineMathNatives, true, \ 476284677Sdim "inline SinD, CosD, etc.") \ 477284677Sdim \ 478284677Sdim develop(bool, InlineClassNatives, true, \ 479284677Sdim "inline Class.isInstance, etc") \ 480284677Sdim \ 481284677Sdim develop(bool, InlineAtomicLong, true, \ 482284677Sdim "inline sun.misc.AtomicLong") \ 483284677Sdim \ 484284677Sdim develop(bool, InlineThreadNatives, true, \ 485284677Sdim "inline Thread.currentThread, etc") \ 486284677Sdim \ 487284677Sdim develop(bool, InlineReflectionGetCallerClass, true, \ 488284677Sdim "inline sun.reflect.Reflection.getCallerClass(), known to be part "\ 489284677Sdim "of base library DLL") \ 490284677Sdim \ 491284677Sdim develop(bool, InlineUnsafeOps, true, \ 492284677Sdim "inline memory ops (native methods) from sun.misc.Unsafe") \ 493284677Sdim \ 494284677Sdim develop(bool, ConvertCmpD2CmpF, true, \ 495284677Sdim "Convert cmpD to cmpF when one input is constant in float range") \ 496284677Sdim \ 497284677Sdim develop(bool, ConvertFloat2IntClipping, true, \ 498284677Sdim "Convert float2int clipping idiom to integer clipping") \ 499284677Sdim \ 500284677Sdim develop(bool, SpecialStringCompareTo, true, \ 501309124Sdim "special version of string compareTo") \ 502284677Sdim \ 503284677Sdim develop(bool, SpecialStringIndexOf, true, \ 504284677Sdim "special version of string indexOf") \ 505284677Sdim \ 506284677Sdim develop(bool, SpecialStringEquals, true, \ 507341825Sdim "special version of string equals") \ 508284677Sdim \ 509284677Sdim develop(bool, SpecialArraysEquals, true, \ 510284677Sdim "special version of Arrays.equals(char[],char[])") \ 511284677Sdim \ 512284677Sdim product(bool, UseSSE42Intrinsics, false, \ 513284677Sdim "SSE4.2 versions of intrinsics") \ 514284677Sdim \ 515284677Sdim develop(bool, TraceCallFixup, false, \ 516284677Sdim "traces all call fixups") \ 517284677Sdim \ 518284677Sdim develop(bool, DeoptimizeALot, false, \ 519314564Sdim "deoptimize at every exit from the runtime system") \ 520284677Sdim \ 521284677Sdim notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 522284677Sdim "a comma separated list of bcis to deoptimize at") \ 523284677Sdim \ 524284677Sdim product(bool, DeoptimizeRandom, false, \ 525284677Sdim "deoptimize random frames on random exit from the runtime system")\ 526284677Sdim \ 527284677Sdim notproduct(bool, ZombieALot, false, \ 528284677Sdim "creates zombies (non-entrant) at exit from the runt. system") \ 529284677Sdim \ 530284677Sdim notproduct(bool, WalkStackALot, false, \ 531284677Sdim "trace stack (no print) at every exit from the runtime system") \ 532284677Sdim \ 533321369Sdim develop(bool, Debugging, false, \ 534341825Sdim "set when executing debug methods in debug.ccp " \ 535341825Sdim "(to prevent triggering assertions)") \ 536284677Sdim \ 537284677Sdim notproduct(bool, StrictSafepointChecks, trueInDebug, \ 538341825Sdim "Enable strict checks that safepoints cannot happen for threads " \ 539284677Sdim "that used No_Safepoint_Verifier") \ 540284677Sdim \ 541341825Sdim notproduct(bool, VerifyLastFrame, false, \ 542284677Sdim "Verify oops on last frame on entry to VM") \ 543284677Sdim \ 544284677Sdim develop(bool, TraceHandleAllocation, false, \ 545314564Sdim "Prints out warnings when suspicious many handles are allocated") \ 546284677Sdim \ 547284677Sdim product(bool, UseCompilerSafepoints, true, \ 548284677Sdim "Stop at safepoints in compiled code") \ 549284677Sdim \ 550284677Sdim product(bool, UseSplitVerifier, true, \ 551284677Sdim "use split verifier with StackMapTable attributes") \ 552284677Sdim \ 553284677Sdim product(bool, FailOverToOldVerifier, true, \ 554284677Sdim "fail over to old verifier when split verifier fails") \ 555284677Sdim \ 556284677Sdim develop(bool, ShowSafepointMsgs, false, \ 557284677Sdim "Show msg. about safepoint synch.") \ 558284677Sdim \ 559284677Sdim product(bool, SafepointTimeout, false, \ 560284677Sdim "Time out and warn or fail after SafepointTimeoutDelay " \ 561284677Sdim "milliseconds if failed to reach safepoint") \ 562284677Sdim \ 563284677Sdim develop(bool, DieOnSafepointTimeout, false, \ 564284677Sdim "Die upon failure to reach safepoint (see SafepointTimeout)") \ 565284677Sdim \ 566284677Sdim /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 567284677Sdim /* typically, at most a few retries are needed */ \ 568284677Sdim product(intx, SuspendRetryCount, 50, \ 569284677Sdim "Maximum retry count for an external suspend request") \ 570284677Sdim \ 571341825Sdim product(intx, SuspendRetryDelay, 5, \ 572284677Sdim "Milliseconds to delay per retry (* current_retry_count)") \ 573284677Sdim \ 574284677Sdim product(bool, AssertOnSuspendWaitFailure, false, \ 575284677Sdim "Assert/Guarantee on external suspend wait failure") \ 576284677Sdim \ 577284677Sdim product(bool, TraceSuspendWaitFailures, false, \ 578284677Sdim "Trace external suspend wait failures") \ 579284677Sdim \ 580284677Sdim product(bool, MaxFDLimit, true, \ 581284677Sdim "Bump the number of file descriptors to max in solaris.") \ 582284677Sdim \ 583284677Sdim notproduct(bool, LogEvents, trueInDebug, \ 584284677Sdim "Enable Event log") \ 585284677Sdim \ 586284677Sdim product(bool, BytecodeVerificationRemote, true, \ 587284677Sdim "Enables the Java bytecode verifier for remote classes") \ 588284677Sdim \ 589284677Sdim product(bool, BytecodeVerificationLocal, false, \ 590284677Sdim "Enables the Java bytecode verifier for local classes") \ 591284677Sdim \ 592284677Sdim develop(bool, ForceFloatExceptions, trueInDebug, \ 593309124Sdim "Force exceptions on FP stack under/overflow") \ 594344779Sdim \ 595341825Sdim develop(bool, SoftMatchFailure, trueInProduct, \ 596309124Sdim "If the DFA fails to match a node, print a message and bail out") \ 597309124Sdim \ 598284677Sdim develop(bool, VerifyStackAtCalls, false, \ 599284677Sdim "Verify that the stack pointer is unchanged after calls") \ 600284677Sdim \ 601284677Sdim develop(bool, TraceJavaAssertions, false, \ 602284677Sdim "Trace java language assertions") \ 603284677Sdim \ 604284677Sdim notproduct(bool, CheckAssertionStatusDirectives, false, \ 605284677Sdim "temporary - see javaClasses.cpp") \ 606284677Sdim \ 607284677Sdim notproduct(bool, PrintMallocFree, false, \ 608284677Sdim "Trace calls to C heap malloc/free allocation") \ 609284677Sdim \ 610284677Sdim notproduct(bool, PrintOopAddress, false, \ 611284677Sdim "Always print the location of the oop") \ 612284677Sdim \ 613284677Sdim notproduct(bool, VerifyCodeCacheOften, false, \ 614284677Sdim "Verify compiled-code cache often") \ 615284677Sdim \ 616284677Sdim develop(bool, ZapDeadCompiledLocals, false, \ 617284677Sdim "Zap dead locals in compiler frames") \ 618341825Sdim \ 619341825Sdim notproduct(bool, ZapDeadLocalsOld, false, \ 620284677Sdim "Zap dead locals (old version, zaps all frames when " \ 621341825Sdim "entering the VM") \ 622341825Sdim \ 623284677Sdim notproduct(bool, CheckOopishValues, false, \ 624341825Sdim "Warn if value contains oop ( requires ZapDeadLocals)") \ 625341825Sdim \ 626284677Sdim develop(bool, UseMallocOnly, false, \ 627341825Sdim "use only malloc/free for allocation (no resource area/arena)") \ 628341825Sdim \ 629284677Sdim develop(bool, PrintMalloc, false, \ 630341825Sdim "print all malloc/free calls") \ 631341825Sdim \ 632284677Sdim develop(bool, ZapResourceArea, trueInDebug, \ 633341825Sdim "Zap freed resource/arena space with 0xABABABAB") \ 634341825Sdim \ 635284677Sdim notproduct(bool, ZapVMHandleArea, trueInDebug, \ 636309124Sdim "Zap freed VM handle space with 0xBCBCBCBC") \ 637309124Sdim \ 638309124Sdim develop(bool, ZapJNIHandleArea, trueInDebug, \ 639309124Sdim "Zap freed JNI handle space with 0xFEFEFEFE") \ 640309124Sdim \ 641321369Sdim develop(bool, ZapUnusedHeapArea, trueInDebug, \ 642321369Sdim "Zap unused heap space with 0xBAADBABE") \ 643284677Sdim \ 644309124Sdim develop(bool, TraceZapUnusedHeapArea, false, \ 645284677Sdim "Trace zapping of unused heap space") \ 646284677Sdim \ 647284677Sdim develop(bool, CheckZapUnusedHeapArea, false, \ 648284677Sdim "Check zapping of unused heap space") \ 649284677Sdim \ 650284677Sdim develop(bool, ZapFillerObjects, trueInDebug, \ 651284677Sdim "Zap filler objects with 0xDEAFBABE") \ 652284677Sdim \ 653284677Sdim develop(bool, PrintVMMessages, true, \ 654284677Sdim "Print vm messages on console") \ 655284677Sdim \ 656284677Sdim product(bool, PrintGCApplicationConcurrentTime, false, \ 657284677Sdim "Print the time the application has been running") \ 658284677Sdim \ 659284677Sdim product(bool, PrintGCApplicationStoppedTime, false, \ 660284677Sdim "Print the time the application has been stopped") \ 661309124Sdim \ 662284677Sdim notproduct(uintx, ErrorHandlerTest, 0, \ 663284677Sdim "If > 0, provokes an error after VM initialization; the value" \ 664314564Sdim "determines which error to provoke. See test_error_handler()" \ 665314564Sdim "in debug.cpp.") \ 666314564Sdim \ 667314564Sdim develop(bool, Verbose, false, \ 668284677Sdim "Prints additional debugging information from other modes") \ 669309124Sdim \ 670309124Sdim develop(bool, PrintMiscellaneous, false, \ 671309124Sdim "Prints uncategorized debugging information (requires +Verbose)") \ 672309124Sdim \ 673309124Sdim develop(bool, WizardMode, false, \ 674284677Sdim "Prints much more debugging information") \ 675284677Sdim \ 676284677Sdim product(bool, ShowMessageBoxOnError, false, \ 677284677Sdim "Keep process alive on VM fatal error") \ 678284677Sdim \ 679284677Sdim product_pd(bool, UseOSErrorReporting, \ 680284677Sdim "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 681284677Sdim \ 682284677Sdim product(bool, SuppressFatalErrorMessage, false, \ 683284677Sdim "Do NO Fatal Error report [Avoid deadlock]") \ 684284677Sdim \ 685284677Sdim product(ccstrlist, OnError, "", \ 686284677Sdim "Run user-defined commands on fatal error; see VMError.cpp " \ 687284677Sdim "for examples") \ 688284677Sdim \ 689284677Sdim product(ccstrlist, OnOutOfMemoryError, "", \ 690284677Sdim "Run user-defined commands on first java.lang.OutOfMemoryError") \ 691284677Sdim \ 692284677Sdim manageable(bool, HeapDumpBeforeFullGC, false, \ 693284677Sdim "Dump heap to file before any major stop-world GC") \ 694284677Sdim \ 695284677Sdim manageable(bool, HeapDumpAfterFullGC, false, \ 696284677Sdim "Dump heap to file after any major stop-world GC") \ 697284677Sdim \ 698284677Sdim manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 699284677Sdim "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 700284677Sdim \ 701314564Sdim manageable(ccstr, HeapDumpPath, NULL, \ 702286684Sdim "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \ 703286684Sdim "directory) of the dump file (defaults to java_pid<pid>.hprof" \ 704286684Sdim "in the working directory)") \ 705284677Sdim \ 706284677Sdim develop(uintx, SegmentedHeapDumpThreshold, 2*G, \ 707284677Sdim "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 708284677Sdim "when the heap usage is larger than this") \ 709284677Sdim \ 710284677Sdim develop(uintx, HeapDumpSegmentSize, 1*G, \ 711284677Sdim "Approximate segment size when generating a segmented heap dump") \ 712284677Sdim \ 713284677Sdim develop(bool, BreakAtWarning, false, \ 714284677Sdim "Execute breakpoint upon encountering VM warning") \ 715284677Sdim \ 716284677Sdim product_pd(bool, UseVectoredExceptions, \ 717284677Sdim "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \ 718284677Sdim \ 719284677Sdim develop(bool, TraceVMOperation, false, \ 720284677Sdim "Trace vm operations") \ 721284677Sdim \ 722284677Sdim develop(bool, UseFakeTimers, false, \ 723284677Sdim "Tells whether the VM should use system time or a fake timer") \ 724284677Sdim \ 725284677Sdim diagnostic(bool, LogCompilation, false, \ 726284677Sdim "Log compilation activity in detail to hotspot.log or LogFile") \ 727284677Sdim \ 728284677Sdim product(bool, PrintCompilation, false, \ 729284677Sdim "Print compilations") \ 730284677Sdim \ 731284677Sdim diagnostic(bool, TraceNMethodInstalls, false, \ 732284677Sdim "Trace nmethod intallation") \ 733284677Sdim \ 734284677Sdim diagnostic(intx, ScavengeRootsInCode, 0, \ 735284677Sdim "0: do not allow scavengable oops in the code cache; " \ 736284677Sdim "1: allow scavenging from the code cache; " \ 737284677Sdim "2: emit as many constants as the compiler can see") \ 738284677Sdim \ 739284677Sdim diagnostic(bool, TraceOSRBreakpoint, false, \ 740284677Sdim "Trace OSR Breakpoint ") \ 741284677Sdim \ 742309124Sdim diagnostic(bool, TraceCompileTriggered, false, \ 743309124Sdim "Trace compile triggered") \ 744309124Sdim \ 745309124Sdim diagnostic(bool, TraceTriggers, false, \ 746344779Sdim "Trace triggers") \ 747309124Sdim \ 748309124Sdim product(bool, AlwaysRestoreFPU, false, \ 749309124Sdim "Restore the FPU control word after every JNI call (expensive)") \ 750309124Sdim \ 751344779Sdim notproduct(bool, PrintCompilation2, false, \ 752309124Sdim "Print additional statistics per compilation") \ 753309124Sdim \ 754309124Sdim diagnostic(bool, PrintAdapterHandlers, false, \ 755309124Sdim "Print code generated for i2c/c2i adapters") \ 756309124Sdim \ 757284677Sdim develop(bool, VerifyAdapterSharing, false, \ 758284677Sdim "Verify that the code for shared adapters is the equivalent") \ 759284677Sdim \ 760284677Sdim diagnostic(bool, PrintAssembly, false, \ 761284677Sdim "Print assembly code (using external disassembler.so)") \ 762284677Sdim \ 763296417Sdim diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 764296417Sdim "Options string passed to disassembler.so") \ 765284677Sdim \ 766284677Sdim diagnostic(bool, PrintNMethods, false, \ 767284677Sdim "Print assembly code for nmethods when generated") \ 768284677Sdim \ 769284677Sdim diagnostic(bool, PrintNativeNMethods, false, \ 770284677Sdim "Print assembly code for native nmethods when generated") \ 771284677Sdim \ 772284677Sdim develop(bool, PrintDebugInfo, false, \ 773284677Sdim "Print debug information for all nmethods when generated") \ 774284677Sdim \ 775284677Sdim develop(bool, PrintRelocations, false, \ 776284677Sdim "Print relocation information for all nmethods when generated") \ 777284677Sdim \ 778284677Sdim develop(bool, PrintDependencies, false, \ 779284677Sdim "Print dependency information for all nmethods when generated") \ 780284677Sdim \ 781284677Sdim develop(bool, PrintExceptionHandlers, false, \ 782284677Sdim "Print exception handler tables for all nmethods when generated") \ 783284677Sdim \ 784341825Sdim develop(bool, InterceptOSException, false, \ 785284677Sdim "Starts debugger when an implicit OS (e.g., NULL) " \ 786284677Sdim "exception happens") \ 787284677Sdim \ 788360784Sdim notproduct(bool, PrintCodeCache, false, \ 789284677Sdim "Print the compiled_code cache when exiting") \ 790284677Sdim \ 791284677Sdim develop(bool, PrintCodeCache2, false, \ 792284677Sdim "Print detailed info on the compiled_code cache when exiting") \ 793284677Sdim \ 794284677Sdim diagnostic(bool, PrintStubCode, false, \ 795284677Sdim "Print generated stub code") \ 796284677Sdim \ 797284677Sdim product(bool, StackTraceInThrowable, true, \ 798284677Sdim "Collect backtrace in throwable when exception happens") \ 799284677Sdim \ 800284677Sdim product(bool, OmitStackTraceInFastThrow, true, \ 801284677Sdim "Omit backtraces for some 'hot' exceptions in optimized code") \ 802284677Sdim \ 803284677Sdim product(bool, ProfilerPrintByteCodeStatistics, false, \ 804284677Sdim "Prints byte code statictics when dumping profiler output") \ 805284677Sdim \ 806284677Sdim product(bool, ProfilerRecordPC, false, \ 807284677Sdim "Collects tick for each 16 byte interval of compiled code") \ 808284677Sdim \ 809284677Sdim product(bool, ProfileVM, false, \ 810284677Sdim "Profiles ticks that fall within VM (either in the VM Thread " \ 811284677Sdim "or VM code called through stubs)") \ 812284677Sdim \ 813284677Sdim product(bool, ProfileIntervals, false, \ 814284677Sdim "Prints profiles for each interval (see ProfileIntervalsTicks)") \ 815284677Sdim \ 816284677Sdim notproduct(bool, ProfilerCheckIntervals, false, \ 817284677Sdim "Collect and print info on spacing of profiler ticks") \ 818284677Sdim \ 819284677Sdim develop(bool, PrintJVMWarnings, false, \ 820284677Sdim "Prints warnings for unimplemented JVM functions") \ 821284677Sdim \ 822284677Sdim notproduct(uintx, WarnOnStalledSpinLock, 0, \ 823284677Sdim "Prints warnings for stalled SpinLocks") \ 824284677Sdim \ 825284677Sdim develop(bool, InitializeJavaLangSystem, true, \ 826284677Sdim "Initialize java.lang.System - turn off for individual " \ 827284677Sdim "method debugging") \ 828284677Sdim \ 829284677Sdim develop(bool, InitializeJavaLangString, true, \ 830284677Sdim "Initialize java.lang.String - turn off for individual " \ 831284677Sdim "method debugging") \ 832284677Sdim \ 833284677Sdim develop(bool, InitializeJavaLangExceptionsErrors, true, \ 834284677Sdim "Initialize various error and exception classes - turn off for " \ 835284677Sdim "individual method debugging") \ 836284677Sdim \ 837284677Sdim product(bool, RegisterFinalizersAtInit, true, \ 838284677Sdim "Register finalizable objects at end of Object.<init> or " \ 839284677Sdim "after allocation") \ 840284677Sdim \ 841284677Sdim develop(bool, RegisterReferences, true, \ 842284677Sdim "Tells whether the VM should register soft/weak/final/phantom " \ 843284677Sdim "references") \ 844284677Sdim \ 845284677Sdim develop(bool, IgnoreRewrites, false, \ 846284677Sdim "Supress rewrites of bytecodes in the oopmap generator. " \ 847284677Sdim "This is unsafe!") \ 848284677Sdim \ 849284677Sdim develop(bool, PrintCodeCacheExtension, false, \ 850284677Sdim "Print extension of code cache") \ 851284677Sdim \ 852284677Sdim develop(bool, UsePrivilegedStack, true, \ 853284677Sdim "Enable the security JVM functions") \ 854284677Sdim \ 855284677Sdim develop(bool, IEEEPrecision, true, \ 856284677Sdim "Enables IEEE precision (for INTEL only)") \ 857284677Sdim \ 858284677Sdim develop(bool, ProtectionDomainVerification, true, \ 859284677Sdim "Verifies protection domain before resolution in system " \ 860284677Sdim "dictionary") \ 861284677Sdim \ 862284677Sdim product(bool, ClassUnloading, true, \ 863284677Sdim "Do unloading of classes") \ 864284677Sdim \ 865284677Sdim diagnostic(bool, LinkWellKnownClasses, false, \ 866284677Sdim "Resolve a well known class as soon as its name is seen") \ 867284677Sdim \ 868284677Sdim develop(bool, DisableStartThread, false, \ 869284677Sdim "Disable starting of additional Java threads " \ 870284677Sdim "(for debugging only)") \ 871284677Sdim \ 872284677Sdim develop(bool, MemProfiling, false, \ 873284677Sdim "Write memory usage profiling to log file") \ 874284677Sdim \ 875284677Sdim notproduct(bool, PrintSystemDictionaryAtExit, false, \ 876284677Sdim "Prints the system dictionary at exit") \ 877284677Sdim \ 878284677Sdim diagnostic(bool, UnsyncloadClass, false, \ 879284677Sdim "Unstable: VM calls loadClass unsynchronized. Custom " \ 880284677Sdim "class loader must call VM synchronized for findClass " \ 881284677Sdim "and defineClass.") \ 882284677Sdim \ 883309124Sdim product(bool, AlwaysLockClassLoader, false, \ 884284677Sdim "Require the VM to acquire the class loader lock before calling " \ 885284677Sdim "loadClass() even for class loaders registering " \ 886284677Sdim "as parallel capable") \ 887284677Sdim \ 888284677Sdim product(bool, AllowParallelDefineClass, false, \ 889309124Sdim "Allow parallel defineClass requests for class loaders " \ 890309124Sdim "registering as parallel capable") \ 891284677Sdim \ 892284677Sdim product(bool, MustCallLoadClassInternal, false, \ 893309124Sdim "Call loadClassInternal() rather than loadClass()") \ 894309124Sdim \ 895309124Sdim product_pd(bool, DontYieldALot, \ 896309124Sdim "Throw away obvious excess yield calls (for SOLARIS only)") \ 897309124Sdim \ 898309124Sdim product_pd(bool, ConvertSleepToYield, \ 899309124Sdim "Converts sleep(0) to thread yield " \ 900309124Sdim "(may be off for SOLARIS to improve GUI)") \ 901309124Sdim \ 902309124Sdim product(bool, ConvertYieldToSleep, false, \ 903284677Sdim "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\ 904309124Sdim "behavior (SOLARIS only)") \ 905284677Sdim \ 906284677Sdim product(bool, UseBoundThreads, true, \ 907284677Sdim "Bind user level threads to kernel threads (for SOLARIS only)") \ 908344779Sdim \ 909284677Sdim develop(bool, UseDetachedThreads, true, \ 910284677Sdim "Use detached threads that are recycled upon termination " \ 911284677Sdim "(for SOLARIS only)") \ 912284677Sdim \ 913284677Sdim product(bool, UseLWPSynchronization, true, \ 914284677Sdim "Use LWP-based instead of libthread-based synchronization " \ 915309124Sdim "(SPARC only)") \ 916284677Sdim \ 917284677Sdim product(ccstr, SyncKnobs, NULL, \ 918284677Sdim "(Unstable) Various monitor synchronization tunables") \ 919284677Sdim \ 920284677Sdim product(intx, EmitSync, 0, \ 921284677Sdim "(Unsafe,Unstable) " \ 922284677Sdim " Controls emission of inline sync fast-path code") \ 923284677Sdim \ 924284677Sdim product(intx, AlwaysInflate, 0, "(Unstable) Force inflation") \ 925284677Sdim \ 926284677Sdim product(intx, Atomics, 0, \ 927284677Sdim "(Unsafe,Unstable) Diagnostic - Controls emission of atomics") \ 928309124Sdim \ 929309124Sdim product(intx, FenceInstruction, 0, \ 930309124Sdim "(Unsafe,Unstable) Experimental") \ 931309124Sdim \ 932309124Sdim product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \ 933309124Sdim \ 934309124Sdim product(intx, SyncVerbose, 0, "(Unstable)" ) \ 935309124Sdim \ 936309124Sdim product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \ 937309124Sdim \ 938309124Sdim product(intx, hashCode, 0, \ 939309124Sdim "(Unstable) select hashCode generation algorithm" ) \ 940309124Sdim \ 941309124Sdim product(intx, WorkAroundNPTLTimedWaitHang, 1, \ 942284677Sdim "(Unstable, Linux-specific)" \ 943284677Sdim " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \ 944284677Sdim \ 945284677Sdim product(bool, FilterSpuriousWakeups, true, \ 946284677Sdim "Prevent spurious or premature wakeups from object.wait " \ 947284677Sdim "(Solaris only)") \ 948284677Sdim \ 949284677Sdim product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \ 950284677Sdim product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \ 951284677Sdim product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \ 952284677Sdim \ 953284677Sdim develop(bool, UsePthreads, false, \ 954284677Sdim "Use pthread-based instead of libthread-based synchronization " \ 955321369Sdim "(SPARC only)") \ 956284677Sdim \ 957284677Sdim product(bool, AdjustConcurrency, false, \ 958284677Sdim "call thr_setconcurrency at thread create time to avoid " \ 959284677Sdim "LWP starvation on MP systems (For Solaris Only)") \ 960284677Sdim \ 961284677Sdim develop(bool, UpdateHotSpotCompilerFileOnError, true, \ 962284677Sdim "Should the system attempt to update the compiler file when " \ 963284677Sdim "an error occurs?") \ 964284677Sdim \ 965284677Sdim product(bool, ReduceSignalUsage, false, \ 966284677Sdim "Reduce the use of OS signals in Java and/or the VM") \ 967284677Sdim \ 968284677Sdim notproduct(bool, ValidateMarkSweep, false, \ 969284677Sdim "Do extra validation during MarkSweep collection") \ 970284677Sdim \ 971284677Sdim notproduct(bool, RecordMarkSweepCompaction, false, \ 972284677Sdim "Enable GC-to-GC recording and querying of compaction during " \ 973284677Sdim "MarkSweep") \ 974284677Sdim \ 975284677Sdim develop_pd(bool, ShareVtableStubs, \ 976360784Sdim "Share vtable stubs (smaller code but worse branch prediction") \ 977360784Sdim \ 978284677Sdim develop(bool, LoadLineNumberTables, true, \ 979284677Sdim "Tells whether the class file parser loads line number tables") \ 980284677Sdim \ 981284677Sdim develop(bool, LoadLocalVariableTables, true, \ 982284677Sdim "Tells whether the class file parser loads local variable tables")\ 983284677Sdim \ 984284677Sdim develop(bool, LoadLocalVariableTypeTables, true, \ 985284677Sdim "Tells whether the class file parser loads local variable type tables")\ 986284677Sdim \ 987284677Sdim product(bool, AllowUserSignalHandlers, false, \ 988284677Sdim "Do not complain if the application installs signal handlers " \ 989284677Sdim "(Solaris & Linux only)") \ 990284677Sdim \ 991284677Sdim product(bool, UseSignalChaining, true, \ 992284677Sdim "Use signal-chaining to invoke signal handlers installed " \ 993284677Sdim "by the application (Solaris & Linux only)") \ 994284677Sdim \ 995284677Sdim product(bool, UseAltSigs, false, \ 996284677Sdim "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 997284677Sdim "internal signals (Solaris only)") \ 998284677Sdim \ 999284677Sdim product(bool, UseSpinning, false, \ 1000284677Sdim "Use spinning in monitor inflation and before entry") \ 1001284677Sdim \ 1002284677Sdim product(bool, PreSpinYield, false, \ 1003284677Sdim "Yield before inner spinning loop") \ 1004284677Sdim \ 1005284677Sdim product(bool, PostSpinYield, true, \ 1006284677Sdim "Yield after inner spinning loop") \ 1007284677Sdim \ 1008284677Sdim product(bool, AllowJNIEnvProxy, false, \ 1009284677Sdim "Allow JNIEnv proxies for jdbx") \ 1010284677Sdim \ 1011284677Sdim product(bool, JNIDetachReleasesMonitors, true, \ 1012284677Sdim "JNI DetachCurrentThread releases monitors owned by thread") \ 1013284677Sdim \ 1014284677Sdim product(bool, RestoreMXCSROnJNICalls, false, \ 1015284677Sdim "Restore MXCSR when returning from JNI calls") \ 1016284677Sdim \ 1017360784Sdim product(bool, CheckJNICalls, false, \ 1018284677Sdim "Verify all arguments to JNI calls") \ 1019284677Sdim \ 1020284677Sdim product(bool, UseFastJNIAccessors, true, \ 1021284677Sdim "Use optimized versions of Get<Primitive>Field") \ 1022284677Sdim \ 1023284677Sdim product(bool, EagerXrunInit, false, \ 1024284677Sdim "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1025284677Sdim " but not all -Xrun libraries may support the state of the VM at this time") \ 1026284677Sdim \ 1027284677Sdim product(bool, PreserveAllAnnotations, false, \ 1028284677Sdim "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \ 1029284677Sdim \ 1030284677Sdim develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1031284677Sdim "Number of OutOfMemoryErrors preallocated with backtrace") \ 1032284677Sdim \ 1033284677Sdim product(bool, LazyBootClassLoader, true, \ 1034284677Sdim "Enable/disable lazy opening of boot class path entries") \ 1035284677Sdim \ 1036284677Sdim diagnostic(bool, UseIncDec, true, \ 1037284677Sdim "Use INC, DEC instructions on x86") \ 1038284677Sdim \ 1039284677Sdim product(bool, UseNewLongLShift, false, \ 1040284677Sdim "Use optimized bitwise shift left") \ 1041284677Sdim \ 1042284677Sdim product(bool, UseStoreImmI16, true, \ 1043360784Sdim "Use store immediate 16-bits value instruction on x86") \ 1044284677Sdim \ 1045284677Sdim product(bool, UseAddressNop, false, \ 1046284677Sdim "Use '0F 1F [addr]' NOP instructions on x86 cpus") \ 1047284677Sdim \ 1048284677Sdim product(bool, UseXmmLoadAndClearUpper, true, \ 1049284677Sdim "Load low part of XMM register and clear upper part") \ 1050284677Sdim \ 1051284677Sdim product(bool, UseXmmRegToRegMoveAll, false, \ 1052284677Sdim "Copy all XMM register bits when moving value between registers") \ 1053284677Sdim \ 1054284677Sdim product(bool, UseXmmI2D, false, \ 1055284677Sdim "Use SSE2 CVTDQ2PD instruction to convert Integer to Double") \ 1056284677Sdim \ 1057284677Sdim product(bool, UseXmmI2F, false, \ 1058284677Sdim "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 1059284677Sdim \ 1060284677Sdim product(bool, UseXMMForArrayCopy, false, \ 1061284677Sdim "Use SSE2 MOVQ instruction for Arraycopy") \ 1062284677Sdim \ 1063284677Sdim product(bool, UseUnalignedLoadStores, false, \ 1064284677Sdim "Use SSE2 MOVDQU instruction for Arraycopy") \ 1065284677Sdim \ 1066284677Sdim product(intx, FieldsAllocationStyle, 1, \ 1067284677Sdim "0 - type based with oops first, 1 - with oops last, " \ 1068284677Sdim "2 - oops in super and sub classes are together") \ 1069284677Sdim \ 1070284677Sdim product(bool, CompactFields, true, \ 1071284677Sdim "Allocate nonstatic fields in gaps between previous fields") \ 1072284677Sdim \ 1073284677Sdim notproduct(bool, PrintCompactFieldsSavings, false, \ 1074284677Sdim "Print how many words were saved with CompactFields") \ 1075284677Sdim \ 1076284677Sdim product(bool, UseBiasedLocking, true, \ 1077284677Sdim "Enable biased locking in JVM") \ 1078284677Sdim \ 1079284677Sdim product(intx, BiasedLockingStartupDelay, 4000, \ 1080284677Sdim "Number of milliseconds to wait before enabling biased locking") \ 1081284677Sdim \ 1082284677Sdim diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1083284677Sdim "Print statistics of biased locking in JVM") \ 1084284677Sdim \ 1085284677Sdim product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1086284677Sdim "Threshold of number of revocations per type to try to " \ 1087284677Sdim "rebias all objects in the heap of that type") \ 1088284677Sdim \ 1089284677Sdim product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1090284677Sdim "Threshold of number of revocations per type to permanently " \ 1091284677Sdim "revoke biases of all objects in the heap of that type") \ 1092284677Sdim \ 1093284677Sdim product(intx, BiasedLockingDecayTime, 25000, \ 1094284677Sdim "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1095284677Sdim "type after previous bulk rebias") \ 1096284677Sdim \ 1097284677Sdim /* tracing */ \ 1098284677Sdim \ 1099284677Sdim notproduct(bool, TraceRuntimeCalls, false, \ 1100284677Sdim "Trace run-time calls") \ 1101284677Sdim \ 1102284677Sdim develop(bool, TraceJNICalls, false, \ 1103284677Sdim "Trace JNI calls") \ 1104284677Sdim \ 1105284677Sdim notproduct(bool, TraceJVMCalls, false, \ 1106284677Sdim "Trace JVM calls") \ 1107284677Sdim \ 1108284677Sdim product(ccstr, TraceJVMTI, NULL, \ 1109284677Sdim "Trace flags for JVMTI functions and events") \ 1110284677Sdim \ 1111284677Sdim product(bool, ForceFullGCJVMTIEpilogues, false, \ 1112284677Sdim "Force 'Full GC' was done semantics for JVMTI GC epilogues") \ 1113284677Sdim \ 1114284677Sdim /* This option can change an EMCP method into an obsolete method. */ \ 1115284677Sdim /* This can affect tests that except specific methods to be EMCP. */ \ 1116284677Sdim /* This option should be used with caution. */ \ 1117284677Sdim product(bool, StressLdcRewrite, false, \ 1118284677Sdim "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1119284677Sdim \ 1120284677Sdim product(intx, TraceRedefineClasses, 0, \ 1121284677Sdim "Trace level for JVMTI RedefineClasses") \ 1122284677Sdim \ 1123284677Sdim develop(bool, StressMethodComparator, false, \ 1124284677Sdim "run the MethodComparator on all loaded methods") \ 1125284677Sdim \ 1126284677Sdim /* change to false by default sometime after Mustang */ \ 1127284677Sdim product(bool, VerifyMergedCPBytecodes, true, \ 1128284677Sdim "Verify bytecodes after RedefineClasses constant pool merging") \ 1129284677Sdim \ 1130284677Sdim develop(bool, TraceJNIHandleAllocation, false, \ 1131284677Sdim "Trace allocation/deallocation of JNI handle blocks") \ 1132284677Sdim \ 1133284677Sdim develop(bool, TraceThreadEvents, false, \ 1134284677Sdim "Trace all thread events") \ 1135284677Sdim \ 1136284677Sdim develop(bool, TraceBytecodes, false, \ 1137284677Sdim "Trace bytecode execution") \ 1138284677Sdim \ 1139309124Sdim develop(bool, TraceClassInitialization, false, \ 1140309124Sdim "Trace class initialization") \ 1141309124Sdim \ 1142314564Sdim develop(bool, TraceExceptions, false, \ 1143314564Sdim "Trace exceptions") \ 1144314564Sdim \ 1145344779Sdim develop(bool, TraceICs, false, \ 1146309124Sdim "Trace inline cache changes") \ 1147314564Sdim \ 1148309124Sdim notproduct(bool, TraceInvocationCounterOverflow, false, \ 1149314564Sdim "Trace method invocation counter overflow") \ 1150314564Sdim \ 1151309124Sdim develop(bool, TraceInlineCacheClearing, false, \ 1152314564Sdim "Trace clearing of inline caches in nmethods") \ 1153321369Sdim \ 1154314564Sdim develop(bool, TraceDependencies, false, \ 1155314564Sdim "Trace dependencies") \ 1156309124Sdim \ 1157309124Sdim develop(bool, VerifyDependencies, trueInDebug, \ 1158314564Sdim "Exercise and verify the compilation dependency mechanism") \ 1159314564Sdim \ 1160314564Sdim develop(bool, TraceNewOopMapGeneration, false, \ 1161314564Sdim "Trace OopMapGeneration") \ 1162309124Sdim \ 1163314564Sdim develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1164309124Sdim "Trace OopMapGeneration: print detailed cell states") \ 1165309124Sdim \ 1166314564Sdim develop(bool, TimeOopMap, false, \ 1167314564Sdim "Time calls to GenerateOopMap::compute_map() in sum") \ 1168314564Sdim \ 1169314564Sdim develop(bool, TimeOopMap2, false, \ 1170309124Sdim "Time calls to GenerateOopMap::compute_map() individually") \ 1171314564Sdim \ 1172314564Sdim develop(bool, TraceMonitorMismatch, false, \ 1173314564Sdim "Trace monitor matching failures during OopMapGeneration") \ 1174314564Sdim \ 1175314564Sdim develop(bool, TraceOopMapRewrites, false, \ 1176314564Sdim "Trace rewritting of method oops during oop map generation") \ 1177314564Sdim \ 1178360784Sdim develop(bool, TraceSafepoint, false, \ 1179327952Sdim "Trace safepoint operations") \ 1180314564Sdim \ 1181314564Sdim develop(bool, TraceICBuffer, false, \ 1182314564Sdim "Trace usage of IC buffer") \ 1183314564Sdim \ 1184314564Sdim develop(bool, TraceCompiledIC, false, \ 1185309124Sdim "Trace changes of compiled IC") \ 1186309124Sdim \ 1187314564Sdim notproduct(bool, TraceZapDeadLocals, false, \ 1188309124Sdim "Trace zapping dead locals") \ 1189309124Sdim \ 1190309124Sdim develop(bool, TraceStartupTime, false, \ 1191314564Sdim "Trace setup time") \ 1192314564Sdim \ 1193309124Sdim develop(bool, TraceHPI, false, \ 1194309124Sdim "Trace Host Porting Interface (HPI)") \ 1195309124Sdim \ 1196314564Sdim product(ccstr, HPILibPath, NULL, \ 1197309124Sdim "Specify alternate path to HPI library") \ 1198309124Sdim \ 1199314564Sdim develop(bool, TraceProtectionDomainVerification, false, \ 1200309124Sdim "Trace protection domain verifcation") \ 1201309124Sdim \ 1202309124Sdim develop(bool, TraceClearedExceptions, false, \ 1203314564Sdim "Prints when an exception is forcibly cleared") \ 1204314564Sdim \ 1205314564Sdim product(bool, TraceClassResolution, false, \ 1206314564Sdim "Trace all constant pool resolutions (for debugging)") \ 1207314564Sdim \ 1208314564Sdim product(bool, TraceBiasedLocking, false, \ 1209314564Sdim "Trace biased locking in JVM") \ 1210314564Sdim \ 1211309124Sdim product(bool, TraceMonitorInflation, false, \ 1212309124Sdim "Trace monitor inflation in JVM") \ 1213314564Sdim \ 1214309124Sdim /* assembler */ \ 1215314564Sdim product(bool, Use486InstrsOnly, false, \ 1216314564Sdim "Use 80486 Compliant instruction subset") \ 1217314564Sdim \ 1218327952Sdim /* gc */ \ 1219314564Sdim \ 1220314564Sdim product(bool, UseSerialGC, false, \ 1221314564Sdim "Use the serial garbage collector") \ 1222314564Sdim \ 1223314564Sdim product(bool, UseG1GC, false, \ 1224314564Sdim "Use the Garbage-First garbage collector") \ 1225314564Sdim \ 1226314564Sdim product(bool, UseParallelGC, false, \ 1227309124Sdim "Use the Parallel Scavenge garbage collector") \ 1228309124Sdim \ 1229284677Sdim product(bool, UseParallelOldGC, false, \ 1230284677Sdim "Use the Parallel Old garbage collector") \ 1231309124Sdim \ 1232314564Sdim product(bool, UseParallelOldGCCompacting, true, \ 1233314564Sdim "In the Parallel Old garbage collector use parallel compaction") \ 1234314564Sdim \ 1235309124Sdim product(bool, UseParallelDensePrefixUpdate, true, \ 1236284677Sdim "In the Parallel Old garbage collector use parallel dense" \ 1237314564Sdim " prefix update") \ 1238314564Sdim \ 1239314564Sdim product(uintx, HeapMaximumCompactionInterval, 20, \ 1240314564Sdim "How often should we maximally compact the heap (not allowing " \ 1241314564Sdim "any dead space)") \ 1242314564Sdim \ 1243353358Sdim product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1244353358Sdim "The collection count for the first maximum compaction") \ 1245314564Sdim \ 1246353358Sdim product(bool, UseMaximumCompactionOnSystemGC, true, \ 1247353358Sdim "In the Parallel Old garbage collector maximum compaction for " \ 1248314564Sdim "a system GC") \ 1249353358Sdim \ 1250314564Sdim product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1251314564Sdim "The mean used by the par compact dead wood" \ 1252314564Sdim "limiter (a number between 0-100).") \ 1253314564Sdim \ 1254314564Sdim product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1255314564Sdim "The standard deviation used by the par compact dead wood" \ 1256314564Sdim "limiter (a number between 0-100).") \ 1257314564Sdim \ 1258314564Sdim product(bool, UseParallelOldGCDensePrefix, true, \ 1259314564Sdim "Use a dense prefix with the Parallel Old garbage collector") \ 1260314564Sdim \ 1261284677Sdim product(uintx, ParallelGCThreads, 0, \ 1262284677Sdim "Number of parallel threads parallel gc will use") \ 1263314564Sdim \ 1264314564Sdim develop(bool, ParallelOldGCSplitALot, false, \ 1265353358Sdim "Provoke splitting (copying data from a young gen space to" \ 1266353358Sdim "multiple destination spaces)") \ 1267314564Sdim \ 1268314564Sdim develop(uintx, ParallelOldGCSplitInterval, 3, \ 1269309124Sdim "How often to provoke splitting a young gen space") \ 1270314564Sdim \ 1271314564Sdim develop(bool, TraceRegionTasksQueuing, false, \ 1272314564Sdim "Trace the queuing of the region tasks") \ 1273344779Sdim \ 1274314564Sdim product(uintx, ConcGCThreads, 0, \ 1275314564Sdim "Number of threads concurrent gc will use") \ 1276353358Sdim \ 1277284677Sdim product(uintx, YoungPLABSize, 4096, \ 1278284677Sdim "Size of young gen promotion labs (in HeapWords)") \ 1279284677Sdim \ 1280284677Sdim product(uintx, OldPLABSize, 1024, \ 1281284677Sdim "Size of old gen promotion labs (in HeapWords)") \ 1282284677Sdim \ 1283314564Sdim product(uintx, GCTaskTimeStampEntries, 200, \ 1284284677Sdim "Number of time stamp entries per gc worker thread") \ 1285284677Sdim \ 1286314564Sdim product(bool, AlwaysTenure, false, \ 1287314564Sdim "Always tenure objects in eden. (ParallelGC only)") \ 1288314564Sdim \ 1289314564Sdim product(bool, NeverTenure, false, \ 1290314564Sdim "Never tenure objects in eden, May tenure on overflow " \ 1291314564Sdim "(ParallelGC only)") \ 1292314564Sdim \ 1293314564Sdim product(bool, ScavengeBeforeFullGC, true, \ 1294314564Sdim "Scavenge youngest generation before each full GC, " \ 1295314564Sdim "used with UseParallelGC") \ 1296284677Sdim \ 1297314564Sdim develop(bool, ScavengeWithObjectsInToSpace, false, \ 1298314564Sdim "Allow scavenges to occur when to_space contains objects.") \ 1299284677Sdim \ 1300284677Sdim product(bool, UseConcMarkSweepGC, false, \ 1301284677Sdim "Use Concurrent Mark-Sweep GC in the old generation") \ 1302284677Sdim \ 1303284677Sdim product(bool, ExplicitGCInvokesConcurrent, false, \ 1304284677Sdim "A System.gc() request invokes a concurrent collection;" \ 1305284677Sdim " (effective only when UseConcMarkSweepGC)") \ 1306284677Sdim \ 1307309124Sdim product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1308284677Sdim "A System.gc() request invokes a concurrent collection and " \ 1309284677Sdim "also unloads classes during such a concurrent gc cycle " \ 1310284677Sdim "(effective only when UseConcMarkSweepGC)") \ 1311284677Sdim \ 1312314564Sdim product(bool, GCLockerInvokesConcurrent, false, \ 1313284677Sdim "The exit of a JNI CS necessitating a scavenge also" \ 1314314564Sdim " kicks off a bkgrd concurrent collection") \ 1315284677Sdim \ 1316353358Sdim develop(bool, UseCMSAdaptiveFreeLists, true, \ 1317353358Sdim "Use Adaptive Free Lists in the CMS generation") \ 1318284677Sdim \ 1319284677Sdim develop(bool, UseAsyncConcMarkSweepGC, true, \ 1320284677Sdim "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1321284677Sdim \ 1322284677Sdim develop(bool, RotateCMSCollectionTypes, false, \ 1323284677Sdim "Rotate the CMS collections among concurrent and STW") \ 1324284677Sdim \ 1325314564Sdim product(bool, UseCMSBestFit, true, \ 1326344779Sdim "Use CMS best fit allocation strategy") \ 1327284677Sdim \ 1328284677Sdim product(bool, UseCMSCollectionPassing, true, \ 1329309124Sdim "Use passing of collection from background to foreground") \ 1330309124Sdim \ 1331309124Sdim product(bool, UseParNewGC, false, \ 1332314564Sdim "Use parallel threads in the new generation.") \ 1333314564Sdim \ 1334314564Sdim product(bool, ParallelGCVerbose, false, \ 1335314564Sdim "Verbose output for parallel GC.") \ 1336314564Sdim \ 1337284677Sdim product(intx, ParallelGCBufferWastePct, 10, \ 1338284677Sdim "wasted fraction of parallel allocation buffer.") \ 1339314564Sdim \ 1340314564Sdim product(bool, ParallelGCRetainPLAB, true, \ 1341284677Sdim "Retain parallel allocation buffers across scavenges.") \ 1342284677Sdim \ 1343284677Sdim product(intx, TargetPLABWastePct, 10, \ 1344284677Sdim "target wasted space in last buffer as pct of overall allocation")\ 1345327952Sdim \ 1346284677Sdim product(uintx, PLABWeight, 75, \ 1347327952Sdim "Percentage (0-100) used to weight the current sample when" \ 1348284677Sdim "computing exponentially decaying average for ResizePLAB.") \ 1349327952Sdim \ 1350284677Sdim product(bool, ResizePLAB, true, \ 1351327952Sdim "Dynamically resize (survivor space) promotion labs") \ 1352284677Sdim \ 1353327952Sdim product(bool, PrintPLAB, false, \ 1354284677Sdim "Print (survivor space) promotion labs sizing decisions") \ 1355327952Sdim \ 1356284677Sdim product(intx, ParGCArrayScanChunk, 50, \ 1357327952Sdim "Scan a subset and push remainder, if array is bigger than this") \ 1358284677Sdim \ 1359327952Sdim product(bool, ParGCUseLocalOverflow, false, \ 1360284677Sdim "Instead of a global overflow list, use local overflow stacks") \ 1361327952Sdim \ 1362284677Sdim product(bool, ParGCTrimOverflow, true, \ 1363327952Sdim "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \ 1364284677Sdim \ 1365327952Sdim notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1366284677Sdim "Whether we should simulate work queue overflow in ParNew") \ 1367327952Sdim \ 1368284677Sdim notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1369327952Sdim "An `interval' counter that determines how frequently " \ 1370284677Sdim "we simulate overflow; a smaller number increases frequency") \ 1371327952Sdim \ 1372284677Sdim product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1373327952Sdim "The desired number of objects to claim from the overflow list") \ 1374284677Sdim \ 1375327952Sdim product(uintx, CMSParPromoteBlocksToClaim, 16, \ 1376284677Sdim "Number of blocks to attempt to claim when refilling CMS LAB for "\ 1377327952Sdim "parallel GC.") \ 1378284677Sdim \ 1379284677Sdim product(uintx, OldPLABWeight, 50, \ 1380284677Sdim "Percentage (0-100) used to weight the current sample when" \ 1381284677Sdim "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \ 1382284677Sdim \ 1383284677Sdim product(bool, ResizeOldPLAB, true, \ 1384309124Sdim "Dynamically resize (old gen) promotion labs") \ 1385309124Sdim \ 1386284677Sdim product(bool, PrintOldPLAB, false, \ 1387309124Sdim "Print (old gen) promotion labs sizing decisions") \ 1388309124Sdim \ 1389309124Sdim product(uintx, CMSOldPLABMin, 16, \ 1390314564Sdim "Min size of CMS gen promotion lab caches per worker per blksize")\ 1391284677Sdim \ 1392314564Sdim product(uintx, CMSOldPLABMax, 1024, \ 1393314564Sdim "Max size of CMS gen promotion lab caches per worker per blksize")\ 1394314564Sdim \ 1395284677Sdim product(uintx, CMSOldPLABNumRefills, 4, \ 1396314564Sdim "Nominal number of refills of CMS gen promotion lab cache" \ 1397314564Sdim " per worker per block size") \ 1398314564Sdim \ 1399314564Sdim product(bool, CMSOldPLABResizeQuicker, false, \ 1400284677Sdim "Whether to react on-the-fly during a scavenge to a sudden" \ 1401314564Sdim " change in block demand rate") \ 1402314564Sdim \ 1403314564Sdim product(uintx, CMSOldPLABToleranceFactor, 4, \ 1404314564Sdim "The tolerance of the phase-change detector for on-the-fly" \ 1405314564Sdim " PLAB resizing during a scavenge") \ 1406314564Sdim \ 1407314564Sdim product(uintx, CMSOldPLABReactivityFactor, 2, \ 1408360784Sdim "The gain in the feedback loop for on-the-fly PLAB resizing" \ 1409327952Sdim " during a scavenge") \ 1410314564Sdim \ 1411309124Sdim product(uintx, CMSOldPLABReactivityCeiling, 10, \ 1412309124Sdim "The clamping of the gain in the feedback loop for on-the-fly" \ 1413314564Sdim " PLAB resizing during a scavenge") \ 1414309124Sdim \ 1415309124Sdim product(bool, AlwaysPreTouch, false, \ 1416309124Sdim "It forces all freshly committed pages to be pre-touched.") \ 1417309124Sdim \ 1418309124Sdim product(bool, CMSUseOldDefaults, false, \ 1419309124Sdim "A flag temporarily introduced to allow reverting to some " \ 1420314564Sdim "older default settings; older as of 6.0") \ 1421309124Sdim \ 1422309124Sdim product(intx, CMSYoungGenPerWorker, 16*M, \ 1423309124Sdim "The amount of young gen chosen by default per GC worker " \ 1424309124Sdim "thread available") \ 1425314564Sdim \ 1426309124Sdim product(bool, GCOverheadReporting, false, \ 1427314564Sdim "Enables the GC overhead reporting facility") \ 1428314564Sdim \ 1429314564Sdim product(intx, GCOverheadReportingPeriodMS, 100, \ 1430284677Sdim "Reporting period for conc GC overhead reporting, in ms ") \ 1431284677Sdim \ 1432309124Sdim product(bool, CMSIncrementalMode, false, \ 1433314564Sdim "Whether CMS GC should operate in \"incremental\" mode") \ 1434314564Sdim \ 1435309124Sdim product(uintx, CMSIncrementalDutyCycle, 10, \ 1436309124Sdim "CMS incremental mode duty cycle (a percentage, 0-100). If" \ 1437309124Sdim "CMSIncrementalPacing is enabled, then this is just the initial" \ 1438309124Sdim "value") \ 1439309124Sdim \ 1440309124Sdim product(bool, CMSIncrementalPacing, true, \ 1441309124Sdim "Whether the CMS incremental mode duty cycle should be " \ 1442309124Sdim "automatically adjusted") \ 1443309124Sdim \ 1444309124Sdim product(uintx, CMSIncrementalDutyCycleMin, 0, \ 1445309124Sdim "Lower bound on the duty cycle when CMSIncrementalPacing is " \ 1446344779Sdim "enabled (a percentage, 0-100)") \ 1447309124Sdim \ 1448309124Sdim product(uintx, CMSIncrementalSafetyFactor, 10, \ 1449309124Sdim "Percentage (0-100) used to add conservatism when computing the " \ 1450309124Sdim "duty cycle") \ 1451309124Sdim \ 1452309124Sdim product(uintx, CMSIncrementalOffset, 0, \ 1453309124Sdim "Percentage (0-100) by which the CMS incremental mode duty cycle" \ 1454309124Sdim " is shifted to the right within the period between young GCs") \ 1455309124Sdim \ 1456344779Sdim product(uintx, CMSExpAvgFactor, 50, \ 1457344779Sdim "Percentage (0-100) used to weight the current sample when" \ 1458314564Sdim "computing exponential averages for CMS statistics.") \ 1459360784Sdim \ 1460360784Sdim product(uintx, CMS_FLSWeight, 75, \ 1461360784Sdim "Percentage (0-100) used to weight the current sample when" \ 1462284677Sdim "computing exponentially decating averages for CMS FLS statistics.") \ 1463284677Sdim \ 1464341825Sdim product(uintx, CMS_FLSPadding, 1, \ 1465327952Sdim "The multiple of deviation from mean to use for buffering" \ 1466284677Sdim "against volatility in free list demand.") \ 1467284677Sdim \ 1468284677Sdim product(uintx, FLSCoalescePolicy, 2, \ 1469284677Sdim "CMS: Aggression level for coalescing, increasing from 0 to 4") \ 1470341825Sdim \ 1471284677Sdim product(bool, FLSAlwaysCoalesceLarge, false, \ 1472341825Sdim "CMS: Larger free blocks are always available for coalescing") \ 1473284677Sdim \ 1474341825Sdim product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1475284677Sdim "CMS: the smaller the percentage the greater the coalition force")\ 1476284677Sdim \ 1477284677Sdim product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1478284677Sdim "CMS: the factor by which to inflate estimated demand of small" \ 1479284677Sdim " block sizes to prevent coalescing with an adjoining block") \ 1480344779Sdim \ 1481284677Sdim product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1482284677Sdim "CMS: the factor by which to inflate estimated demand of large" \ 1483284677Sdim " block sizes to prevent coalescing with an adjoining block") \ 1484284677Sdim \ 1485284677Sdim product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1486284677Sdim "CMS: the factor by which to inflate estimated demand of small" \ 1487284677Sdim " block sizes to prevent splitting to supply demand for smaller" \ 1488284677Sdim " blocks") \ 1489284677Sdim \ 1490284677Sdim product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1491284677Sdim "CMS: the factor by which to inflate estimated demand of large" \ 1492284677Sdim " block sizes to prevent splitting to supply demand for smaller" \ 1493284677Sdim " blocks") \ 1494284677Sdim \ 1495284677Sdim product(bool, CMSExtrapolateSweep, false, \ 1496284677Sdim "CMS: cushion for block demand during sweep") \ 1497284677Sdim \ 1498284677Sdim product(uintx, CMS_SweepWeight, 75, \ 1499284677Sdim "Percentage (0-100) used to weight the current sample when " \ 1500284677Sdim "computing exponentially decaying average for inter-sweep " \ 1501284677Sdim "duration") \ 1502284677Sdim \ 1503284677Sdim product(uintx, CMS_SweepPadding, 1, \ 1504284677Sdim "The multiple of deviation from mean to use for buffering " \ 1505309124Sdim "against volatility in inter-sweep duration.") \ 1506309124Sdim \ 1507309124Sdim product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1508284677Sdim "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1509284677Sdim "duration exceeds this threhold in milliseconds") \ 1510284677Sdim \ 1511284677Sdim develop(bool, CMSTraceIncrementalMode, false, \ 1512284677Sdim "Trace CMS incremental mode") \ 1513284677Sdim \ 1514284677Sdim develop(bool, CMSTraceIncrementalPacing, false, \ 1515344779Sdim "Trace CMS incremental mode pacing computation") \ 1516284677Sdim \ 1517284677Sdim develop(bool, CMSTraceThreadState, false, \ 1518284677Sdim "Trace the CMS thread state (enable the trace_state() method)") \ 1519314564Sdim \ 1520314564Sdim product(bool, CMSClassUnloadingEnabled, false, \ 1521314564Sdim "Whether class unloading enabled when using CMS GC") \ 1522314564Sdim \ 1523314564Sdim product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1524314564Sdim "When CMS class unloading is enabled, the maximum CMS cycle count"\ 1525284677Sdim " for which classes may not be unloaded") \ 1526314564Sdim \ 1527284677Sdim product(bool, CMSCompactWhenClearAllSoftRefs, true, \ 1528284677Sdim "Compact when asked to collect CMS gen with clear_all_soft_refs") \ 1529284677Sdim \ 1530284677Sdim product(bool, UseCMSCompactAtFullCollection, true, \ 1531284677Sdim "Use mark sweep compact at full collections") \ 1532284677Sdim \ 1533284677Sdim product(uintx, CMSFullGCsBeforeCompaction, 0, \ 1534284677Sdim "Number of CMS full collection done before compaction if > 0") \ 1535284677Sdim \ 1536284677Sdim develop(intx, CMSDictionaryChoice, 0, \ 1537284677Sdim "Use BinaryTreeDictionary as default in the CMS generation") \ 1538309124Sdim \ 1539309124Sdim product(uintx, CMSIndexedFreeListReplenish, 4, \ 1540309124Sdim "Replenish and indexed free list with this number of chunks") \ 1541341825Sdim \ 1542309124Sdim product(bool, CMSReplenishIntermediate, true, \ 1543309124Sdim "Replenish all intermediate free-list caches") \ 1544309124Sdim \ 1545309124Sdim product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1546309124Sdim "When satisfying batched demand, splot blocks from the " \ 1547309124Sdim "IndexedFreeList whose size is a multiple of requested size") \ 1548309124Sdim \ 1549309124Sdim product(bool, CMSLoopWarn, false, \ 1550309124Sdim "Warn in case of excessive CMS looping") \ 1551309124Sdim \ 1552309124Sdim develop(bool, CMSOverflowEarlyRestoration, false, \ 1553341825Sdim "Whether preserved marks should be restored early") \ 1554341825Sdim \ 1555341825Sdim product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1556341825Sdim "Size of marking stack") \ 1557341825Sdim \ 1558341825Sdim product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1559341825Sdim "Max size of marking stack") \ 1560341825Sdim \ 1561341825Sdim notproduct(bool, CMSMarkStackOverflowALot, false, \ 1562341825Sdim "Whether we should simulate frequent marking stack / work queue" \ 1563341825Sdim " overflow") \ 1564341825Sdim \ 1565341825Sdim notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1566341825Sdim "An `interval' counter that determines how frequently" \ 1567341825Sdim " we simulate overflow; a smaller number increases frequency") \ 1568341825Sdim \ 1569341825Sdim product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1570341825Sdim "(Temporary, subject to experimentation)" \ 1571341825Sdim "Maximum number of abortable preclean iterations, if > 0") \ 1572341825Sdim \ 1573341825Sdim product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1574341825Sdim "(Temporary, subject to experimentation)" \ 1575284677Sdim "Maximum time in abortable preclean in ms") \ 1576284677Sdim \ 1577284677Sdim product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1578284677Sdim "(Temporary, subject to experimentation)" \ 1579309124Sdim "Nominal minimum work per abortable preclean iteration") \ 1580309124Sdim \ 1581309124Sdim product(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1582284677Sdim "(Temporary, subject to experimentation)" \ 1583284677Sdim " Time that we sleep between iterations when not given" \ 1584284677Sdim " enough work per iteration") \ 1585284677Sdim \ 1586284677Sdim product(uintx, CMSRescanMultiple, 32, \ 1587284677Sdim "Size (in cards) of CMS parallel rescan task") \ 1588314564Sdim \ 1589321369Sdim product(uintx, CMSConcMarkMultiple, 32, \ 1590314564Sdim "Size (in cards) of CMS concurrent MT marking task") \ 1591314564Sdim \ 1592314564Sdim product(uintx, CMSRevisitStackSize, 1*M, \ 1593284677Sdim "Size of CMS KlassKlass revisit stack") \ 1594284677Sdim \ 1595284677Sdim product(bool, CMSAbortSemantics, false, \ 1596284677Sdim "Whether abort-on-overflow semantics is implemented") \ 1597284677Sdim \ 1598284677Sdim product(bool, CMSParallelRemarkEnabled, true, \ 1599284677Sdim "Whether parallel remark enabled (only if ParNewGC)") \ 1600284677Sdim \ 1601284677Sdim product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1602284677Sdim "Whether parallel remark of survivor space" \ 1603284677Sdim " enabled (effective only if CMSParallelRemarkEnabled)") \ 1604309124Sdim \ 1605341825Sdim product(bool, CMSPLABRecordAlways, true, \ 1606284677Sdim "Whether to always record survivor space PLAB bdries" \ 1607284677Sdim " (effective only if CMSParallelSurvivorRemarkEnabled)") \ 1608284677Sdim \ 1609284677Sdim product(bool, CMSConcurrentMTEnabled, true, \ 1610284677Sdim "Whether multi-threaded concurrent work enabled (if ParNewGC)") \ 1611284677Sdim \ 1612284677Sdim product(bool, CMSPermGenPrecleaningEnabled, true, \ 1613284677Sdim "Whether concurrent precleaning enabled in perm gen" \ 1614284677Sdim " (effective only when CMSPrecleaningEnabled is true)") \ 1615284677Sdim \ 1616284677Sdim product(bool, CMSPrecleaningEnabled, true, \ 1617284677Sdim "Whether concurrent precleaning enabled") \ 1618284677Sdim \ 1619284677Sdim product(uintx, CMSPrecleanIter, 3, \ 1620284677Sdim "Maximum number of precleaning iteration passes") \ 1621284677Sdim \ 1622284677Sdim product(uintx, CMSPrecleanNumerator, 2, \ 1623284677Sdim "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1624284677Sdim " ratio") \ 1625284677Sdim \ 1626284677Sdim product(uintx, CMSPrecleanDenominator, 3, \ 1627284677Sdim "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \ 1628284677Sdim " ratio") \ 1629284677Sdim \ 1630284677Sdim product(bool, CMSPrecleanRefLists1, true, \ 1631284677Sdim "Preclean ref lists during (initial) preclean phase") \ 1632341825Sdim \ 1633284677Sdim product(bool, CMSPrecleanRefLists2, false, \ 1634360784Sdim "Preclean ref lists during abortable preclean phase") \ 1635309124Sdim \ 1636309124Sdim product(bool, CMSPrecleanSurvivors1, false, \ 1637341825Sdim "Preclean survivors during (initial) preclean phase") \ 1638341825Sdim \ 1639341825Sdim product(bool, CMSPrecleanSurvivors2, true, \ 1640314564Sdim "Preclean survivors during abortable preclean phase") \ 1641314564Sdim \ 1642284677Sdim product(uintx, CMSPrecleanThreshold, 1000, \ 1643284677Sdim "Don't re-iterate if #dirty cards less than this") \ 1644284677Sdim \ 1645284677Sdim product(bool, CMSCleanOnEnter, true, \ 1646284677Sdim "Clean-on-enter optimization for reducing number of dirty cards") \ 1647284677Sdim \ 1648286684Sdim product(uintx, CMSRemarkVerifyVariant, 1, \ 1649286684Sdim "Choose variant (1,2) of verification following remark") \ 1650284677Sdim \ 1651284677Sdim product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1652284677Sdim "If Eden used is below this value, don't try to schedule remark") \ 1653284677Sdim \ 1654284677Sdim product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1655321369Sdim "The Eden occupancy % at which to try and schedule remark pause") \ 1656321369Sdim \ 1657321369Sdim product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1658344779Sdim "Start sampling Eden top at least before yg occupancy reaches" \ 1659321369Sdim " 1/<ratio> of the size at which we plan to schedule remark") \ 1660321369Sdim \ 1661321369Sdim product(uintx, CMSSamplingGrain, 16*K, \ 1662321369Sdim "The minimum distance between eden samples for CMS (see above)") \ 1663321369Sdim \ 1664353358Sdim product(bool, CMSScavengeBeforeRemark, false, \ 1665353358Sdim "Attempt scavenge before the CMS remark step") \ 1666353358Sdim \ 1667309124Sdim develop(bool, CMSTraceSweeper, false, \ 1668309124Sdim "Trace some actions of the CMS sweeper") \ 1669309124Sdim \ 1670309124Sdim product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1671309124Sdim "Don't drain below this size per parallel worker/thief") \ 1672309124Sdim \ 1673309124Sdim product(intx, CMSWaitDuration, 2000, \ 1674309124Sdim "Time in milliseconds that CMS thread waits for young GC") \ 1675309124Sdim \ 1676309124Sdim product(bool, CMSYield, true, \ 1677309124Sdim "Yield between steps of concurrent mark & sweep") \ 1678309124Sdim \ 1679309124Sdim product(uintx, CMSBitMapYieldQuantum, 10*M, \ 1680309124Sdim "Bitmap operations should process at most this many bits" \ 1681309124Sdim "between yields") \ 1682309124Sdim \ 1683284677Sdim product(bool, CMSDumpAtPromotionFailure, false, \ 1684284677Sdim "Dump useful information about the state of the CMS old " \ 1685284677Sdim " generation upon a promotion failure.") \ 1686284677Sdim \ 1687284677Sdim product(bool, CMSPrintChunksInDump, false, \ 1688344779Sdim "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1689344779Sdim " more detailed information about the free chunks.") \ 1690344779Sdim \ 1691344779Sdim product(bool, CMSPrintObjectsInDump, false, \ 1692344779Sdim "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1693344779Sdim " more detailed information about the allocated objects.") \ 1694344779Sdim \ 1695344779Sdim diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1696284677Sdim "Verify that all refs across the FLS boundary " \ 1697309124Sdim " are to valid objects") \ 1698284677Sdim \ 1699284677Sdim diagnostic(bool, FLSVerifyLists, false, \ 1700284677Sdim "Do lots of (expensive) FreeListSpace verification") \ 1701284677Sdim \ 1702284677Sdim diagnostic(bool, FLSVerifyIndexTable, false, \ 1703284677Sdim "Do lots of (expensive) FLS index table verification") \ 1704284677Sdim \ 1705284677Sdim develop(bool, FLSVerifyDictionary, false, \ 1706284677Sdim "Do lots of (expensive) FLS dictionary verification") \ 1707284677Sdim \ 1708284677Sdim develop(bool, VerifyBlockOffsetArray, false, \ 1709284677Sdim "Do (expensive!) block offset array verification") \ 1710284677Sdim \ 1711284677Sdim product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug, \ 1712309124Sdim "Maintain _unallocated_block in BlockOffsetArray" \ 1713284677Sdim " (currently applicable only to CMS collector)") \ 1714360784Sdim \ 1715284677Sdim develop(bool, TraceCMSState, false, \ 1716284677Sdim "Trace the state of the CMS collection") \ 1717284677Sdim \ 1718284677Sdim product(intx, RefDiscoveryPolicy, 0, \ 1719284677Sdim "Whether reference-based(0) or referent-based(1)") \ 1720284677Sdim \ 1721284677Sdim product(bool, ParallelRefProcEnabled, false, \ 1722284677Sdim "Enable parallel reference processing whenever possible") \ 1723284677Sdim \ 1724309124Sdim product(bool, ParallelRefProcBalancingEnabled, true, \ 1725309124Sdim "Enable balancing of reference processing queues") \ 1726284677Sdim \ 1727284677Sdim product(intx, CMSTriggerRatio, 80, \ 1728284677Sdim "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1729284677Sdim "allocated before a CMS collection cycle commences") \ 1730284677Sdim \ 1731344779Sdim product(intx, CMSTriggerPermRatio, 80, \ 1732344779Sdim "Percentage of MinHeapFreeRatio in the CMS perm generation that " \ 1733344779Sdim "is allocated before a CMS collection cycle commences, that " \ 1734344779Sdim "also collects the perm generation") \ 1735344779Sdim \ 1736344779Sdim product(uintx, CMSBootstrapOccupancy, 50, \ 1737344779Sdim "Percentage CMS generation occupancy at which to " \ 1738344779Sdim "initiate CMS collection for bootstrapping collection stats") \ 1739344779Sdim \ 1740344779Sdim product(intx, CMSInitiatingOccupancyFraction, -1, \ 1741284677Sdim "Percentage CMS generation occupancy to start a CMS collection " \ 1742284677Sdim "cycle. A negative value means that CMSTriggerRatio is used") \ 1743284677Sdim \ 1744284677Sdim product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1745284677Sdim "Percentage of the (entire) heap occupancy to start a " \ 1746284677Sdim "concurrent GC cycle. It us used by GCs that trigger a " \ 1747284677Sdim "concurrent GC cycle based on the occupancy of the entire heap, " \ 1748284677Sdim "not just one of the generations (e.g., G1). A value of 0 " \ 1749284677Sdim "denotes 'do constant GC cycles'.") \ 1750284677Sdim \ 1751284677Sdim product(intx, CMSInitiatingPermOccupancyFraction, -1, \ 1752284677Sdim "Percentage CMS perm generation occupancy to start a " \ 1753284677Sdim "CMScollection cycle. A negative value means that " \ 1754284677Sdim "CMSTriggerPermRatio is used") \ 1755284677Sdim \ 1756284677Sdim product(bool, UseCMSInitiatingOccupancyOnly, false, \ 1757284677Sdim "Only use occupancy as a crierion for starting a CMS collection") \ 1758284677Sdim \ 1759284677Sdim product(intx, CMSIsTooFullPercentage, 98, \ 1760284677Sdim "An absolute ceiling above which CMS will always consider the " \ 1761284677Sdim "perm gen ripe for collection") \ 1762284677Sdim \ 1763284677Sdim develop(bool, CMSTestInFreeList, false, \ 1764309124Sdim "Check if the coalesced range is already in the " \ 1765309124Sdim "free lists as claimed") \ 1766284677Sdim \ 1767284677Sdim notproduct(bool, CMSVerifyReturnedBytes, false, \ 1768309124Sdim "Check that all the garbage collected was returned to the " \ 1769309124Sdim "free lists.") \ 1770309124Sdim \ 1771284677Sdim notproduct(bool, ScavengeALot, false, \ 1772284677Sdim "Force scavenge at every Nth exit from the runtime system " \ 1773284677Sdim "(N=ScavengeALotInterval)") \ 1774284677Sdim \ 1775284677Sdim develop(bool, FullGCALot, false, \ 1776284677Sdim "Force full gc at every Nth exit from the runtime system " \ 1777284677Sdim "(N=FullGCALotInterval)") \ 1778284677Sdim \ 1779284677Sdim notproduct(bool, GCALotAtAllSafepoints, false, \ 1780284677Sdim "Enforce ScavengeALot/GCALot at all potential safepoints") \ 1781284677Sdim \ 1782284677Sdim product(bool, HandlePromotionFailure, true, \ 1783284677Sdim "The youngest generation collection does not require " \ 1784284677Sdim "a guarantee of full promotion of all live objects.") \ 1785284677Sdim \ 1786284677Sdim product(bool, PrintPromotionFailure, false, \ 1787284677Sdim "Print additional diagnostic information following " \ 1788284677Sdim " promotion failure") \ 1789284677Sdim \ 1790284677Sdim notproduct(bool, PromotionFailureALot, false, \ 1791284677Sdim "Use promotion failure handling on every youngest generation " \ 1792341825Sdim "collection") \ 1793341825Sdim \ 1794341825Sdim develop(uintx, PromotionFailureALotCount, 1000, \ 1795341825Sdim "Number of promotion failures occurring at ParGCAllocBuffer" \ 1796341825Sdim "refill attempts (ParNew) or promotion attempts " \ 1797341825Sdim "(other young collectors) ") \ 1798341825Sdim \ 1799341825Sdim develop(uintx, PromotionFailureALotInterval, 5, \ 1800341825Sdim "Total collections between promotion failures alot") \ 1801341825Sdim \ 1802341825Sdim develop(intx, WorkStealingSleepMillis, 1, \ 1803341825Sdim "Sleep time when sleep is used for yields") \ 1804341825Sdim \ 1805341825Sdim develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ 1806341825Sdim "Number of yields before a sleep is done during workstealing") \ 1807341825Sdim \ 1808341825Sdim develop(uintx, WorkStealingHardSpins, 4096, \ 1809341825Sdim "Number of iterations in a spin loop between checks on " \ 1810341825Sdim "time out of hard spin") \ 1811341825Sdim \ 1812341825Sdim develop(uintx, WorkStealingSpinToYieldRatio, 10, \ 1813341825Sdim "Ratio of hard spins to calls to yield") \ 1814341825Sdim \ 1815341825Sdim product(uintx, PreserveMarkStackSize, 1024, \ 1816341825Sdim "Size for stack used in promotion failure handling") \ 1817341825Sdim \ 1818341825Sdim develop(uintx, ObjArrayMarkingStride, 512, \ 1819341825Sdim "Number of ObjArray elements to push onto the marking stack" \ 1820341825Sdim "before pushing a continuation entry") \ 1821341825Sdim \ 1822341825Sdim product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 1823341825Sdim \ 1824341825Sdim product_pd(bool, ResizeTLAB, \ 1825341825Sdim "Dynamically resize tlab size for threads") \ 1826341825Sdim \ 1827341825Sdim product(bool, ZeroTLAB, false, \ 1828341825Sdim "Zero out the newly created TLAB") \ 1829341825Sdim \ 1830341825Sdim product(bool, FastTLABRefill, true, \ 1831341825Sdim "Use fast TLAB refill code") \ 1832341825Sdim \ 1833341825Sdim product(bool, PrintTLAB, false, \ 1834341825Sdim "Print various TLAB related information") \ 1835341825Sdim \ 1836341825Sdim product(bool, TLABStats, true, \ 1837341825Sdim "Print various TLAB related information") \ 1838284677Sdim \ 1839284677Sdim product(bool, PrintRevisitStats, false, \ 1840284677Sdim "Print revisit (klass and MDO) stack related information") \ 1841284677Sdim \ 1842284677Sdim product_pd(bool, NeverActAsServerClassMachine, \ 1843284677Sdim "Never act like a server-class machine") \ 1844284677Sdim \ 1845314564Sdim product(bool, AlwaysActAsServerClassMachine, false, \ 1846284677Sdim "Always act like a server-class machine") \ 1847284677Sdim \ 1848284677Sdim product_pd(uint64_t, MaxRAM, \ 1849284677Sdim "Real memory size (in bytes) used to set maximum heap size") \ 1850284677Sdim \ 1851284677Sdim product(uintx, ErgoHeapSizeLimit, 0, \ 1852314564Sdim "Maximum ergonomically set heap size (in bytes); zero means use " \ 1853284677Sdim "MaxRAM / MaxRAMFraction") \ 1854284677Sdim \ 1855284677Sdim product(uintx, MaxRAMFraction, 4, \ 1856284677Sdim "Maximum fraction (1/n) of real memory used for maximum heap " \ 1857284677Sdim "size") \ 1858284677Sdim \ 1859284677Sdim product(uintx, DefaultMaxRAMFraction, 4, \ 1860284677Sdim "Maximum fraction (1/n) of real memory used for maximum heap " \ 1861284677Sdim "size; deprecated: to be renamed to MaxRAMFraction") \ 1862284677Sdim \ 1863284677Sdim product(uintx, MinRAMFraction, 2, \ 1864284677Sdim "Minimum fraction (1/n) of real memory used for maxmimum heap " \ 1865284677Sdim "size on systems with small physical memory size") \ 1866284677Sdim \ 1867284677Sdim product(uintx, InitialRAMFraction, 64, \ 1868284677Sdim "Fraction (1/n) of real memory used for initial heap size") \ 1869284677Sdim \ 1870284677Sdim product(bool, UseAutoGCSelectPolicy, false, \ 1871284677Sdim "Use automatic collection selection policy") \ 1872284677Sdim \ 1873284677Sdim product(uintx, AutoGCSelectPauseMillis, 5000, \ 1874284677Sdim "Automatic GC selection pause threshhold in ms") \ 1875284677Sdim \ 1876284677Sdim product(bool, UseAdaptiveSizePolicy, true, \ 1877314564Sdim "Use adaptive generation sizing policies") \ 1878284677Sdim \ 1879284677Sdim product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 1880314564Sdim "Use adaptive survivor sizing policies") \ 1881314564Sdim \ 1882284677Sdim product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 1883284677Sdim "Use adaptive young-old sizing policies at minor collections") \ 1884284677Sdim \ 1885284677Sdim product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 1886284677Sdim "Use adaptive young-old sizing policies at major collections") \ 1887284677Sdim \ 1888284677Sdim product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 1889284677Sdim "Use statistics from System.GC for adaptive size policy") \ 1890284677Sdim \ 1891284677Sdim product(bool, UseAdaptiveGCBoundary, false, \ 1892284677Sdim "Allow young-old boundary to move") \ 1893309124Sdim \ 1894284677Sdim develop(bool, TraceAdaptiveGCBoundary, false, \ 1895284677Sdim "Trace young-old boundary moves") \ 1896284677Sdim \ 1897284677Sdim develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 1898284677Sdim "Resize the virtual spaces of the young or old generations") \ 1899284677Sdim \ 1900284677Sdim product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 1901284677Sdim "Policy for changeing generation size for throughput goals") \ 1902284677Sdim \ 1903284677Sdim product(uintx, AdaptiveSizePausePolicy, 0, \ 1904284677Sdim "Policy for changing generation size for pause goals") \ 1905284677Sdim \ 1906284677Sdim develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 1907284677Sdim "Adjust tenured generation to achive a minor pause goal") \ 1908284677Sdim \ 1909284677Sdim develop(bool, PSAdjustYoungGenForMajorPause, false, \ 1910284677Sdim "Adjust young generation to achive a major pause goal") \ 1911284677Sdim \ 1912284677Sdim product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 1913284677Sdim "Number of steps where heuristics is used before data is used") \ 1914309124Sdim \ 1915284677Sdim develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 1916284677Sdim "Number of collections before the adaptive sizing is started") \ 1917284677Sdim \ 1918284677Sdim product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 1919284677Sdim "Collecton interval for printing information; zero => never") \ 1920284677Sdim \ 1921284677Sdim product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 1922284677Sdim "Use adaptive minimum footprint as a goal") \ 1923284677Sdim \ 1924284677Sdim product(uintx, AdaptiveSizePolicyWeight, 10, \ 1925284677Sdim "Weight given to exponential resizing, between 0 and 100") \ 1926284677Sdim \ 1927284677Sdim product(uintx, AdaptiveTimeWeight, 25, \ 1928314564Sdim "Weight given to time in adaptive policy, between 0 and 100") \ 1929314564Sdim \ 1930284677Sdim product(uintx, PausePadding, 1, \ 1931284677Sdim "How much buffer to keep for pause time") \ 1932284677Sdim \ 1933284677Sdim product(uintx, PromotedPadding, 3, \ 1934314564Sdim "How much buffer to keep for promotion failure") \ 1935284677Sdim \ 1936284677Sdim product(uintx, SurvivorPadding, 3, \ 1937284677Sdim "How much buffer to keep for survivor overflow") \ 1938284677Sdim \ 1939284677Sdim product(uintx, AdaptivePermSizeWeight, 20, \ 1940284677Sdim "Weight for perm gen exponential resizing, between 0 and 100") \ 1941284677Sdim \ 1942284677Sdim product(uintx, PermGenPadding, 3, \ 1943284677Sdim "How much buffer to keep for perm gen sizing") \ 1944284677Sdim \ 1945284677Sdim product(uintx, ThresholdTolerance, 10, \ 1946284677Sdim "Allowed collection cost difference between generations") \ 1947284677Sdim \ 1948314564Sdim product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 1949314564Sdim "If collection costs are within margin, reduce both by full " \ 1950314564Sdim "delta") \ 1951284677Sdim \ 1952284677Sdim product(uintx, YoungGenerationSizeIncrement, 20, \ 1953314564Sdim "Adaptive size percentage change in young generation") \ 1954314564Sdim \ 1955284677Sdim product(uintx, YoungGenerationSizeSupplement, 80, \ 1956284677Sdim "Supplement to YoungedGenerationSizeIncrement used at startup") \ 1957296417Sdim \ 1958284677Sdim product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 1959284677Sdim "Decay factor to YoungedGenerationSizeSupplement") \ 1960284677Sdim \ 1961284677Sdim product(uintx, TenuredGenerationSizeIncrement, 20, \ 1962309124Sdim "Adaptive size percentage change in tenured generation") \ 1963284677Sdim \ 1964284677Sdim product(uintx, TenuredGenerationSizeSupplement, 80, \ 1965284677Sdim "Supplement to TenuredGenerationSizeIncrement used at startup") \ 1966284677Sdim \ 1967284677Sdim product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 1968284677Sdim "Decay factor to TenuredGenerationSizeIncrement") \ 1969284677Sdim \ 1970284677Sdim product(uintx, MaxGCPauseMillis, max_uintx, \ 1971284677Sdim "Adaptive size policy maximum GC pause time goal in msec, " \ 1972284677Sdim "or (G1 Only) the max. GC time per MMU time slice") \ 1973284677Sdim \ 1974284677Sdim product(intx, GCPauseIntervalMillis, 500, \ 1975284677Sdim "Time slice for MMU specification") \ 1976284677Sdim \ 1977284677Sdim product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 1978284677Sdim "Adaptive size policy maximum GC minor pause time goal in msec") \ 1979284677Sdim \ 1980284677Sdim product(uintx, GCTimeRatio, 99, \ 1981284677Sdim "Adaptive size policy application time to GC time ratio") \ 1982284677Sdim \ 1983284677Sdim product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 1984284677Sdim "Adaptive size scale down factor for shrinking") \ 1985284677Sdim \ 1986284677Sdim product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 1987284677Sdim "Adaptive size decays the major cost for long major intervals") \ 1988284677Sdim \ 1989284677Sdim product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 1990284677Sdim "Time scale over which major costs decay") \ 1991360784Sdim \ 1992284677Sdim product(uintx, MinSurvivorRatio, 3, \ 1993284677Sdim "Minimum ratio of young generation/survivor space size") \ 1994314564Sdim \ 1995284677Sdim product(uintx, InitialSurvivorRatio, 8, \ 1996284677Sdim "Initial ratio of eden/survivor space size") \ 1997284677Sdim \ 1998284677Sdim product(uintx, BaseFootPrintEstimate, 256*M, \ 1999284677Sdim "Estimate of footprint other than Java Heap") \ 2000284677Sdim \ 2001284677Sdim product(bool, UseGCOverheadLimit, true, \ 2002284677Sdim "Use policy to limit of proportion of time spent in GC " \ 2003284677Sdim "before an OutOfMemory error is thrown") \ 2004284677Sdim \ 2005284677Sdim product(uintx, GCTimeLimit, 98, \ 2006314564Sdim "Limit of proportion of time spent in GC before an OutOfMemory" \ 2007284677Sdim "error is thrown (used with GCHeapFreeLimit)") \ 2008284677Sdim \ 2009284677Sdim product(uintx, GCHeapFreeLimit, 2, \ 2010284677Sdim "Minimum percentage of free space after a full GC before an " \ 2011284677Sdim "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2012284677Sdim \ 2013284677Sdim develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2014284677Sdim "Number of consecutive collections before gc time limit fires") \ 2015284677Sdim \ 2016284677Sdim product(bool, PrintAdaptiveSizePolicy, false, \ 2017284677Sdim "Print information about AdaptiveSizePolicy") \ 2018284677Sdim \ 2019284677Sdim product(intx, PrefetchCopyIntervalInBytes, -1, \ 2020284677Sdim "How far ahead to prefetch destination area (<= 0 means off)") \ 2021284677Sdim \ 2022314564Sdim product(intx, PrefetchScanIntervalInBytes, -1, \ 2023284677Sdim "How far ahead to prefetch scan area (<= 0 means off)") \ 2024284677Sdim \ 2025284677Sdim product(intx, PrefetchFieldsAhead, -1, \ 2026284677Sdim "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2027284677Sdim \ 2028284677Sdim develop(bool, UsePrefetchQueue, true, \ 2029284677Sdim "Use the prefetch queue during PS promotion") \ 2030284677Sdim \ 2031284677Sdim diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2032284677Sdim "Verify system before exiting") \ 2033284677Sdim \ 2034284677Sdim diagnostic(bool, VerifyBeforeGC, false, \ 2035284677Sdim "Verify memory system before GC") \ 2036284677Sdim \ 2037284677Sdim diagnostic(bool, VerifyAfterGC, false, \ 2038284677Sdim "Verify memory system after GC") \ 2039284677Sdim \ 2040284677Sdim diagnostic(bool, VerifyDuringGC, false, \ 2041284677Sdim "Verify memory system during GC (between phases)") \ 2042284677Sdim \ 2043284677Sdim diagnostic(bool, GCParallelVerificationEnabled, true, \ 2044284677Sdim "Enable parallel memory system verification") \ 2045284677Sdim \ 2046284677Sdim diagnostic(bool, DeferInitialCardMark, false, \ 2047284677Sdim "When +ReduceInitialCardMarks, explicitly defer any that " \ 2048284677Sdim "may arise from new_pre_store_barrier") \ 2049284677Sdim \ 2050284677Sdim diagnostic(bool, VerifyRememberedSets, false, \ 2051284677Sdim "Verify GC remembered sets") \ 2052284677Sdim \ 2053341825Sdim diagnostic(bool, VerifyObjectStartArray, true, \ 2054341825Sdim "Verify GC object start array if verify before/after") \ 2055341825Sdim \ 2056341825Sdim product(bool, DisableExplicitGC, false, \ 2057341825Sdim "Tells whether calling System.gc() does a full GC") \ 2058341825Sdim \ 2059341825Sdim notproduct(bool, CheckMemoryInitialization, false, \ 2060341825Sdim "Checks memory initialization") \ 2061341825Sdim \ 2062341825Sdim product(bool, CollectGen0First, false, \ 2063314564Sdim "Collect youngest generation before each full GC") \ 2064284677Sdim \ 2065284677Sdim diagnostic(bool, BindCMSThreadToCPU, false, \ 2066284677Sdim "Bind CMS Thread to CPU if possible") \ 2067284677Sdim \ 2068284677Sdim diagnostic(uintx, CPUForCMSThread, 0, \ 2069309124Sdim "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2070309124Sdim \ 2071309124Sdim product(bool, BindGCTaskThreadsToCPUs, false, \ 2072309124Sdim "Bind GCTaskThreads to CPUs if possible") \ 2073341825Sdim \ 2074284677Sdim product(bool, UseGCTaskAffinity, false, \ 2075284677Sdim "Use worker affinity when asking for GCTasks") \ 2076309124Sdim \ 2077284677Sdim product(uintx, ProcessDistributionStride, 4, \ 2078341825Sdim "Stride through processors when distributing processes") \ 2079284677Sdim \ 2080284677Sdim product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2081284677Sdim "number of times the coordinator GC thread will sleep while " \ 2082284677Sdim "yielding before giving up and resuming GC") \ 2083284677Sdim \ 2084341825Sdim product(uintx, CMSYieldSleepCount, 0, \ 2085284677Sdim "number of times a GC thread (minus the coordinator) " \ 2086284677Sdim "will sleep while yielding before giving up and resuming GC") \ 2087284677Sdim \ 2088284677Sdim /* gc tracing */ \ 2089284677Sdim manageable(bool, PrintGC, false, \ 2090341825Sdim "Print message at garbage collect") \ 2091284677Sdim \ 2092341825Sdim manageable(bool, PrintGCDetails, false, \ 2093284677Sdim "Print more details at garbage collect") \ 2094284677Sdim \ 2095284677Sdim manageable(bool, PrintGCDateStamps, false, \ 2096284677Sdim "Print date stamps at garbage collect") \ 2097284677Sdim \ 2098284677Sdim manageable(bool, PrintGCTimeStamps, false, \ 2099284677Sdim "Print timestamps at garbage collect") \ 2100284677Sdim \ 2101284677Sdim product(bool, PrintGCTaskTimeStamps, false, \ 2102284677Sdim "Print timestamps for individual gc worker thread tasks") \ 2103341825Sdim \ 2104341825Sdim develop(intx, ConcGCYieldTimeout, 0, \ 2105341825Sdim "If non-zero, assert that GC threads yield within this # of ms.") \ 2106341825Sdim \ 2107341825Sdim notproduct(bool, TraceMarkSweep, false, \ 2108341825Sdim "Trace mark sweep") \ 2109341825Sdim \ 2110341825Sdim product(bool, PrintReferenceGC, false, \ 2111341825Sdim "Print times spent handling reference objects during GC " \ 2112341825Sdim " (enabled only when PrintGCDetails)") \ 2113341825Sdim \ 2114284677Sdim develop(bool, TraceReferenceGC, false, \ 2115284677Sdim "Trace handling of soft/weak/final/phantom references") \ 2116284677Sdim \ 2117284677Sdim develop(bool, TraceFinalizerRegistration, false, \ 2118284677Sdim "Trace registration of final references") \ 2119284677Sdim \ 2120284677Sdim notproduct(bool, TraceScavenge, false, \ 2121284677Sdim "Trace scavenge") \ 2122284677Sdim \ 2123284677Sdim product_rw(bool, TraceClassLoading, false, \ 2124284677Sdim "Trace all classes loaded") \ 2125284677Sdim \ 2126341825Sdim product(bool, TraceClassLoadingPreorder, false, \ 2127284677Sdim "Trace all classes loaded in order referenced (not loaded)") \ 2128284677Sdim \ 2129284677Sdim product_rw(bool, TraceClassUnloading, false, \ 2130284677Sdim "Trace unloading of classes") \ 2131284677Sdim \ 2132284677Sdim product_rw(bool, TraceLoaderConstraints, false, \ 2133284677Sdim "Trace loader constraints") \ 2134284677Sdim \ 2135284677Sdim product(bool, TraceGen0Time, false, \ 2136284677Sdim "Trace accumulated time for Gen 0 collection") \ 2137284677Sdim \ 2138284677Sdim product(bool, TraceGen1Time, false, \ 2139284677Sdim "Trace accumulated time for Gen 1 collection") \ 2140284677Sdim \ 2141341825Sdim product(bool, PrintTenuringDistribution, false, \ 2142284677Sdim "Print tenuring age information") \ 2143284677Sdim \ 2144341825Sdim product_rw(bool, PrintHeapAtGC, false, \ 2145309124Sdim "Print heap layout before and after each GC") \ 2146309124Sdim \ 2147309124Sdim product_rw(bool, PrintHeapAtGCExtended, false, \ 2148309124Sdim "Prints extended information about the layout of the heap " \ 2149341825Sdim "when -XX:+PrintHeapAtGC is set") \ 2150309124Sdim \ 2151341825Sdim product(bool, PrintHeapAtSIGBREAK, true, \ 2152341825Sdim "Print heap layout in response to SIGBREAK") \ 2153341825Sdim \ 2154284677Sdim manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2155284677Sdim "Print a class histogram before any major stop-world GC") \ 2156341825Sdim \ 2157284677Sdim manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2158284677Sdim "Print a class histogram after any major stop-world GC") \ 2159284677Sdim \ 2160341825Sdim manageable(bool, PrintClassHistogram, false, \ 2161284677Sdim "Print a histogram of class instances") \ 2162341825Sdim \ 2163284677Sdim develop(bool, TraceWorkGang, false, \ 2164341825Sdim "Trace activities of work gangs") \ 2165284677Sdim \ 2166284677Sdim product(bool, TraceParallelOldGCTasks, false, \ 2167284677Sdim "Trace multithreaded GC activity") \ 2168284677Sdim \ 2169284677Sdim develop(bool, TraceBlockOffsetTable, false, \ 2170284677Sdim "Print BlockOffsetTable maps") \ 2171284677Sdim \ 2172341825Sdim develop(bool, TraceCardTableModRefBS, false, \ 2173284677Sdim "Print CardTableModRefBS maps") \ 2174341825Sdim \ 2175284677Sdim develop(bool, TraceGCTaskManager, false, \ 2176284677Sdim "Trace actions of the GC task manager") \ 2177284677Sdim \ 2178284677Sdim develop(bool, TraceGCTaskQueue, false, \ 2179284677Sdim "Trace actions of the GC task queues") \ 2180284677Sdim \ 2181284677Sdim develop(bool, TraceGCTaskThread, false, \ 2182284677Sdim "Trace actions of the GC task threads") \ 2183341825Sdim \ 2184284677Sdim product(bool, PrintParallelOldGCPhaseTimes, false, \ 2185284677Sdim "Print the time taken by each parallel old gc phase." \ 2186284677Sdim "PrintGCDetails must also be enabled.") \ 2187284677Sdim \ 2188284677Sdim develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2189284677Sdim "Trace parallel old gc marking phase") \ 2190284677Sdim \ 2191284677Sdim develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2192284677Sdim "Trace parallel old gc summary phase") \ 2193284677Sdim \ 2194284677Sdim develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2195284677Sdim "Trace parallel old gc compaction phase") \ 2196284677Sdim \ 2197284677Sdim develop(bool, TraceParallelOldGCDensePrefix, false, \ 2198284677Sdim "Trace parallel old gc dense prefix computation") \ 2199284677Sdim \ 2200341825Sdim develop(bool, IgnoreLibthreadGPFault, false, \ 2201284677Sdim "Suppress workaround for libthread GP fault") \ 2202284677Sdim \ 2203341825Sdim product(bool, PrintJNIGCStalls, false, \ 2204284677Sdim "Print diagnostic message when GC is stalled" \ 2205284677Sdim "by JNI critical section") \ 2206309124Sdim \ 2207284677Sdim /* JVMTI heap profiling */ \ 2208284677Sdim \ 2209284677Sdim diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2210284677Sdim "Trace JVMTI object tagging calls") \ 2211284677Sdim \ 2212341825Sdim diagnostic(bool, VerifyBeforeIteration, false, \ 2213284677Sdim "Verify memory system before JVMTI iteration") \ 2214341825Sdim \ 2215341825Sdim /* compiler interface */ \ 2216341825Sdim \ 2217341825Sdim develop(bool, CIPrintCompilerName, false, \ 2218341825Sdim "when CIPrint is active, print the name of the active compiler") \ 2219341825Sdim \ 2220341825Sdim develop(bool, CIPrintCompileQueue, false, \ 2221341825Sdim "display the contents of the compile queue whenever a " \ 2222284677Sdim "compilation is enqueued") \ 2223284677Sdim \ 2224341825Sdim develop(bool, CIPrintRequests, false, \ 2225341825Sdim "display every request for compilation") \ 2226341825Sdim \ 2227341825Sdim product(bool, CITime, false, \ 2228341825Sdim "collect timing information for compilation") \ 2229341825Sdim \ 2230341825Sdim develop(bool, CITimeEach, false, \ 2231341825Sdim "display timing information after each successful compilation") \ 2232284677Sdim \ 2233284677Sdim develop(bool, CICountOSR, true, \ 2234341825Sdim "use a separate counter when assigning ids to osr compilations") \ 2235341825Sdim \ 2236341825Sdim develop(bool, CICompileNatives, true, \ 2237341825Sdim "compile native methods if supported by the compiler") \ 2238341825Sdim \ 2239341825Sdim develop_pd(bool, CICompileOSR, \ 2240341825Sdim "compile on stack replacement methods if supported by the " \ 2241341825Sdim "compiler") \ 2242284677Sdim \ 2243284677Sdim develop(bool, CIPrintMethodCodes, false, \ 2244284677Sdim "print method bytecodes of the compiled code") \ 2245284677Sdim \ 2246284677Sdim develop(bool, CIPrintTypeFlow, false, \ 2247284677Sdim "print the results of ciTypeFlow analysis") \ 2248284677Sdim \ 2249341825Sdim develop(bool, CITraceTypeFlow, false, \ 2250284677Sdim "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2251284677Sdim \ 2252284677Sdim develop(intx, CICloneLoopTestLimit, 100, \ 2253284677Sdim "size limit for blocks heuristically cloned in ciTypeFlow") \ 2254284677Sdim \ 2255284677Sdim /* temp diagnostics */ \ 2256284677Sdim \ 2257341825Sdim diagnostic(bool, TraceRedundantCompiles, false, \ 2258284677Sdim "Have compile broker print when a request already in the queue is"\ 2259284677Sdim " requested again") \ 2260284677Sdim \ 2261284677Sdim diagnostic(bool, InitialCompileFast, false, \ 2262284677Sdim "Initial compile at CompLevel_fast_compile") \ 2263284677Sdim \ 2264284677Sdim diagnostic(bool, InitialCompileReallyFast, false, \ 2265284677Sdim "Initial compile at CompLevel_really_fast_compile (no profile)") \ 2266284677Sdim \ 2267341825Sdim diagnostic(bool, FullProfileOnReInterpret, true, \ 2268341825Sdim "On re-interpret unc-trap compile next at CompLevel_fast_compile")\ 2269341825Sdim \ 2270284677Sdim /* compiler */ \ 2271284677Sdim \ 2272341825Sdim product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2273341825Sdim "Number of compiler threads to run") \ 2274341825Sdim \ 2275284677Sdim product(intx, CompilationPolicyChoice, 0, \ 2276284677Sdim "which compilation policy (0/1)") \ 2277341825Sdim \ 2278341825Sdim develop(bool, UseStackBanging, true, \ 2279284677Sdim "use stack banging for stack overflow checks (required for " \ 2280284677Sdim "proper StackOverflow handling; disable only to measure cost " \ 2281284677Sdim "of stackbanging)") \ 2282284677Sdim \ 2283284677Sdim develop(bool, Use24BitFPMode, true, \ 2284284677Sdim "Set 24-bit FPU mode on a per-compile basis ") \ 2285284677Sdim \ 2286284677Sdim develop(bool, Use24BitFP, true, \ 2287284677Sdim "use FP instructions that produce 24-bit precise results") \ 2288341825Sdim \ 2289284677Sdim develop(bool, UseStrictFP, true, \ 2290341825Sdim "use strict fp if modifier strictfp is set") \ 2291284677Sdim \ 2292284677Sdim develop(bool, GenerateSynchronizationCode, true, \ 2293284677Sdim "generate locking/unlocking code for synchronized methods and " \ 2294284677Sdim "monitors") \ 2295284677Sdim \ 2296284677Sdim develop(bool, GenerateCompilerNullChecks, true, \ 2297284677Sdim "Generate explicit null checks for loads/stores/calls") \ 2298284677Sdim \ 2299284677Sdim develop(bool, GenerateRangeChecks, true, \ 2300284677Sdim "Generate range checks for array accesses") \ 2301284677Sdim \ 2302284677Sdim develop_pd(bool, ImplicitNullChecks, \ 2303284677Sdim "generate code for implicit null checks") \ 2304 \ 2305 product(bool, PrintSafepointStatistics, false, \ 2306 "print statistics about safepoint synchronization") \ 2307 \ 2308 product(intx, PrintSafepointStatisticsCount, 300, \ 2309 "total number of safepoint statistics collected " \ 2310 "before printing them out") \ 2311 \ 2312 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2313 "print safepoint statistics only when safepoint takes" \ 2314 " more than PrintSafepointSatisticsTimeout in millis") \ 2315 \ 2316 product(bool, TraceSafepointCleanupTime, false, \ 2317 "print the break down of clean up tasks performed during" \ 2318 " safepoint") \ 2319 \ 2320 develop(bool, InlineAccessors, true, \ 2321 "inline accessor methods (get/set)") \ 2322 \ 2323 product(bool, Inline, true, \ 2324 "enable inlining") \ 2325 \ 2326 product(bool, ClipInlining, true, \ 2327 "clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2328 \ 2329 develop(bool, UseCHA, true, \ 2330 "enable CHA") \ 2331 \ 2332 product(bool, UseTypeProfile, true, \ 2333 "Check interpreter profile for historically monomorphic calls") \ 2334 \ 2335 product(intx, TypeProfileMajorReceiverPercent, 90, \ 2336 "% of major receiver type to all profiled receivers") \ 2337 \ 2338 notproduct(bool, TimeCompiler, false, \ 2339 "time the compiler") \ 2340 \ 2341 notproduct(bool, TimeCompiler2, false, \ 2342 "detailed time the compiler (requires +TimeCompiler)") \ 2343 \ 2344 diagnostic(bool, PrintInlining, false, \ 2345 "prints inlining optimizations") \ 2346 \ 2347 diagnostic(bool, PrintIntrinsics, false, \ 2348 "prints attempted and successful inlining of intrinsics") \ 2349 \ 2350 product(bool, UseCountLeadingZerosInstruction, false, \ 2351 "Use count leading zeros instruction") \ 2352 \ 2353 product(bool, UsePopCountInstruction, false, \ 2354 "Use population count instruction") \ 2355 \ 2356 diagnostic(ccstrlist, DisableIntrinsic, "", \ 2357 "do not expand intrinsics whose (internal) names appear here") \ 2358 \ 2359 develop(bool, StressReflectiveCode, false, \ 2360 "Use inexact types at allocations, etc., to test reflection") \ 2361 \ 2362 develop(bool, EagerInitialization, false, \ 2363 "Eagerly initialize classes if possible") \ 2364 \ 2365 product(bool, Tier1UpdateMethodData, trueInTiered, \ 2366 "Update methodDataOops in Tier1-generated code") \ 2367 \ 2368 develop(bool, TraceMethodReplacement, false, \ 2369 "Print when methods are replaced do to recompilation") \ 2370 \ 2371 develop(bool, PrintMethodFlushing, false, \ 2372 "print the nmethods being flushed") \ 2373 \ 2374 notproduct(bool, LogMultipleMutexLocking, false, \ 2375 "log locking and unlocking of mutexes (only if multiple locks " \ 2376 "are held)") \ 2377 \ 2378 develop(bool, UseRelocIndex, false, \ 2379 "use an index to speed random access to relocations") \ 2380 \ 2381 develop(bool, StressCodeBuffers, false, \ 2382 "Exercise code buffer expansion and other rare state changes") \ 2383 \ 2384 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2385 "Generate extra debugging info for non-safepoints in nmethods") \ 2386 \ 2387 diagnostic(bool, DebugInlinedCalls, true, \ 2388 "If false, restricts profiled locations to the root method only") \ 2389 \ 2390 product(bool, PrintVMOptions, trueInDebug, \ 2391 "Print flags that appeared on the command line") \ 2392 \ 2393 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2394 "Ignore unrecognized VM options") \ 2395 \ 2396 product(bool, PrintCommandLineFlags, false, \ 2397 "Print flags specified on command line or set by ergonomics") \ 2398 \ 2399 product(bool, PrintFlagsInitial, false, \ 2400 "Print all VM flags before argument processing and exit VM") \ 2401 \ 2402 product(bool, PrintFlagsFinal, false, \ 2403 "Print all VM flags after argument and ergonomic processing") \ 2404 \ 2405 diagnostic(bool, SerializeVMOutput, true, \ 2406 "Use a mutex to serialize output to tty and hotspot.log") \ 2407 \ 2408 diagnostic(bool, DisplayVMOutput, true, \ 2409 "Display all VM output on the tty, independently of LogVMOutput") \ 2410 \ 2411 diagnostic(bool, LogVMOutput, trueInDebug, \ 2412 "Save VM output to hotspot.log, or to LogFile") \ 2413 \ 2414 diagnostic(ccstr, LogFile, NULL, \ 2415 "If LogVMOutput is on, save VM output to this file [hotspot.log]") \ 2416 \ 2417 product(ccstr, ErrorFile, NULL, \ 2418 "If an error occurs, save the error data to this file " \ 2419 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2420 \ 2421 product(bool, DisplayVMOutputToStderr, false, \ 2422 "If DisplayVMOutput is true, display all VM output to stderr") \ 2423 \ 2424 product(bool, DisplayVMOutputToStdout, false, \ 2425 "If DisplayVMOutput is true, display all VM output to stdout") \ 2426 \ 2427 product(bool, UseHeavyMonitors, false, \ 2428 "use heavyweight instead of lightweight Java monitors") \ 2429 \ 2430 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2431 "print histogram of the symbol table") \ 2432 \ 2433 notproduct(bool, ExitVMOnVerifyError, false, \ 2434 "standard exit from VM if bytecode verify error " \ 2435 "(only in debug mode)") \ 2436 \ 2437 notproduct(ccstr, AbortVMOnException, NULL, \ 2438 "Call fatal if this exception is thrown. Example: " \ 2439 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2440 \ 2441 develop(bool, DebugVtables, false, \ 2442 "add debugging code to vtable dispatch") \ 2443 \ 2444 develop(bool, PrintVtables, false, \ 2445 "print vtables when printing klass") \ 2446 \ 2447 notproduct(bool, PrintVtableStats, false, \ 2448 "print vtables stats at end of run") \ 2449 \ 2450 develop(bool, TraceCreateZombies, false, \ 2451 "trace creation of zombie nmethods") \ 2452 \ 2453 notproduct(bool, IgnoreLockingAssertions, false, \ 2454 "disable locking assertions (for speed)") \ 2455 \ 2456 notproduct(bool, VerifyLoopOptimizations, false, \ 2457 "verify major loop optimizations") \ 2458 \ 2459 product(bool, RangeCheckElimination, true, \ 2460 "Split loop iterations to eliminate range checks") \ 2461 \ 2462 develop_pd(bool, UncommonNullCast, \ 2463 "track occurrences of null in casts; adjust compiler tactics") \ 2464 \ 2465 develop(bool, TypeProfileCasts, true, \ 2466 "treat casts like calls for purposes of type profiling") \ 2467 \ 2468 develop(bool, MonomorphicArrayCheck, true, \ 2469 "Uncommon-trap array store checks that require full type check") \ 2470 \ 2471 develop(bool, DelayCompilationDuringStartup, true, \ 2472 "Delay invoking the compiler until main application class is " \ 2473 "loaded") \ 2474 \ 2475 develop(bool, CompileTheWorld, false, \ 2476 "Compile all methods in all classes in bootstrap class path " \ 2477 "(stress test)") \ 2478 \ 2479 develop(bool, CompileTheWorldPreloadClasses, true, \ 2480 "Preload all classes used by a class before start loading") \ 2481 \ 2482 notproduct(bool, CompileTheWorldIgnoreInitErrors, false, \ 2483 "Compile all methods although class initializer failed") \ 2484 \ 2485 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2486 "Force a safepoint every n compiles so sweeper can keep up") \ 2487 \ 2488 develop(bool, TraceIterativeGVN, false, \ 2489 "Print progress during Iterative Global Value Numbering") \ 2490 \ 2491 develop(bool, FillDelaySlots, true, \ 2492 "Fill delay slots (on SPARC only)") \ 2493 \ 2494 develop(bool, VerifyIterativeGVN, false, \ 2495 "Verify Def-Use modifications during sparse Iterative Global " \ 2496 "Value Numbering") \ 2497 \ 2498 notproduct(bool, TracePhaseCCP, false, \ 2499 "Print progress during Conditional Constant Propagation") \ 2500 \ 2501 develop(bool, TimeLivenessAnalysis, false, \ 2502 "Time computation of bytecode liveness analysis") \ 2503 \ 2504 develop(bool, TraceLivenessGen, false, \ 2505 "Trace the generation of liveness analysis information") \ 2506 \ 2507 notproduct(bool, TraceLivenessQuery, false, \ 2508 "Trace queries of liveness analysis information") \ 2509 \ 2510 notproduct(bool, CollectIndexSetStatistics, false, \ 2511 "Collect information about IndexSets") \ 2512 \ 2513 develop(bool, PrintDominators, false, \ 2514 "Print out dominator trees for GVN") \ 2515 \ 2516 develop(bool, UseLoopSafepoints, true, \ 2517 "Generate Safepoint nodes in every loop") \ 2518 \ 2519 notproduct(bool, TraceCISCSpill, false, \ 2520 "Trace allocators use of cisc spillable instructions") \ 2521 \ 2522 notproduct(bool, TraceSpilling, false, \ 2523 "Trace spilling") \ 2524 \ 2525 product(bool, SplitIfBlocks, true, \ 2526 "Clone compares and control flow through merge points to fold " \ 2527 "some branches") \ 2528 \ 2529 develop(intx, FastAllocateSizeLimit, 128*K, \ 2530 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2531 "Inline allocations larger than this in doublewords must go slow")\ 2532 \ 2533 product(bool, AggressiveOpts, false, \ 2534 "Enable aggressive optimizations - see arguments.cpp") \ 2535 \ 2536 product(bool, UseStringCache, false, \ 2537 "Enable String cache capabilities on String.java") \ 2538 \ 2539 /* statistics */ \ 2540 develop(bool, UseVTune, false, \ 2541 "enable support for Intel's VTune profiler") \ 2542 \ 2543 develop(bool, CountCompiledCalls, false, \ 2544 "counts method invocations") \ 2545 \ 2546 notproduct(bool, CountRuntimeCalls, false, \ 2547 "counts VM runtime calls") \ 2548 \ 2549 develop(bool, CountJNICalls, false, \ 2550 "counts jni method invocations") \ 2551 \ 2552 notproduct(bool, CountJVMCalls, false, \ 2553 "counts jvm method invocations") \ 2554 \ 2555 notproduct(bool, CountRemovableExceptions, false, \ 2556 "count exceptions that could be replaced by branches due to " \ 2557 "inlining") \ 2558 \ 2559 notproduct(bool, ICMissHistogram, false, \ 2560 "produce histogram of IC misses") \ 2561 \ 2562 notproduct(bool, PrintClassStatistics, false, \ 2563 "prints class statistics at end of run") \ 2564 \ 2565 notproduct(bool, PrintMethodStatistics, false, \ 2566 "prints method statistics at end of run") \ 2567 \ 2568 /* interpreter */ \ 2569 develop(bool, ClearInterpreterLocals, false, \ 2570 "Always clear local variables of interpreter activations upon " \ 2571 "entry") \ 2572 \ 2573 product_pd(bool, RewriteBytecodes, \ 2574 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2575 \ 2576 product_pd(bool, RewriteFrequentPairs, \ 2577 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2578 \ 2579 diagnostic(bool, PrintInterpreter, false, \ 2580 "Prints the generated interpreter code") \ 2581 \ 2582 product(bool, UseInterpreter, true, \ 2583 "Use interpreter for non-compiled methods") \ 2584 \ 2585 develop(bool, UseFastSignatureHandlers, true, \ 2586 "Use fast signature handlers for native calls") \ 2587 \ 2588 develop(bool, UseV8InstrsOnly, false, \ 2589 "Use SPARC-V8 Compliant instruction subset") \ 2590 \ 2591 product(bool, UseNiagaraInstrs, false, \ 2592 "Use Niagara-efficient instruction subset") \ 2593 \ 2594 develop(bool, UseCASForSwap, false, \ 2595 "Do not use swap instructions, but only CAS (in a loop) on SPARC")\ 2596 \ 2597 product(bool, UseLoopCounter, true, \ 2598 "Increment invocation counter on backward branch") \ 2599 \ 2600 product(bool, UseFastEmptyMethods, true, \ 2601 "Use fast method entry code for empty methods") \ 2602 \ 2603 product(bool, UseFastAccessorMethods, true, \ 2604 "Use fast method entry code for accessor methods") \ 2605 \ 2606 product_pd(bool, UseOnStackReplacement, \ 2607 "Use on stack replacement, calls runtime if invoc. counter " \ 2608 "overflows in loop") \ 2609 \ 2610 notproduct(bool, TraceOnStackReplacement, false, \ 2611 "Trace on stack replacement") \ 2612 \ 2613 develop(bool, PoisonOSREntry, true, \ 2614 "Detect abnormal calls to OSR code") \ 2615 \ 2616 product_pd(bool, PreferInterpreterNativeStubs, \ 2617 "Use always interpreter stubs for native methods invoked via " \ 2618 "interpreter") \ 2619 \ 2620 develop(bool, CountBytecodes, false, \ 2621 "Count number of bytecodes executed") \ 2622 \ 2623 develop(bool, PrintBytecodeHistogram, false, \ 2624 "Print histogram of the executed bytecodes") \ 2625 \ 2626 develop(bool, PrintBytecodePairHistogram, false, \ 2627 "Print histogram of the executed bytecode pairs") \ 2628 \ 2629 diagnostic(bool, PrintSignatureHandlers, false, \ 2630 "Print code generated for native method signature handlers") \ 2631 \ 2632 develop(bool, VerifyOops, false, \ 2633 "Do plausibility checks for oops") \ 2634 \ 2635 develop(bool, CheckUnhandledOops, false, \ 2636 "Check for unhandled oops in VM code") \ 2637 \ 2638 develop(bool, VerifyJNIFields, trueInDebug, \ 2639 "Verify jfieldIDs for instance fields") \ 2640 \ 2641 notproduct(bool, VerifyJNIEnvThread, false, \ 2642 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2643 "from JNI") \ 2644 \ 2645 develop(bool, VerifyFPU, false, \ 2646 "Verify FPU state (check for NaN's, etc.)") \ 2647 \ 2648 develop(bool, VerifyThread, false, \ 2649 "Watch the thread register for corruption (SPARC only)") \ 2650 \ 2651 develop(bool, VerifyActivationFrameSize, false, \ 2652 "Verify that activation frame didn't become smaller than its " \ 2653 "minimal size") \ 2654 \ 2655 develop(bool, TraceFrequencyInlining, false, \ 2656 "Trace frequency based inlining") \ 2657 \ 2658 notproduct(bool, TraceTypeProfile, false, \ 2659 "Trace type profile") \ 2660 \ 2661 develop_pd(bool, InlineIntrinsics, \ 2662 "Inline intrinsics that can be statically resolved") \ 2663 \ 2664 product_pd(bool, ProfileInterpreter, \ 2665 "Profile at the bytecode level during interpretation") \ 2666 \ 2667 develop_pd(bool, ProfileTraps, \ 2668 "Profile deoptimization traps at the bytecode level") \ 2669 \ 2670 product(intx, ProfileMaturityPercentage, 20, \ 2671 "number of method invocations/branches (expressed as % of " \ 2672 "CompileThreshold) before using the method's profile") \ 2673 \ 2674 develop(bool, PrintMethodData, false, \ 2675 "Print the results of +ProfileInterpreter at end of run") \ 2676 \ 2677 develop(bool, VerifyDataPointer, trueInDebug, \ 2678 "Verify the method data pointer during interpreter profiling") \ 2679 \ 2680 develop(bool, VerifyCompiledCode, false, \ 2681 "Include miscellaneous runtime verifications in nmethod code; " \ 2682 "default off because it disturbs nmethod size heuristics") \ 2683 \ 2684 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2685 "Manually make GC thread crash then dump java stack trace; " \ 2686 "Test only") \ 2687 \ 2688 /* compilation */ \ 2689 product(bool, UseCompiler, true, \ 2690 "use compilation") \ 2691 \ 2692 develop(bool, TraceCompilationPolicy, false, \ 2693 "Trace compilation policy") \ 2694 \ 2695 develop(bool, TimeCompilationPolicy, false, \ 2696 "Time the compilation policy") \ 2697 \ 2698 product(bool, UseCounterDecay, true, \ 2699 "adjust recompilation counters") \ 2700 \ 2701 develop(intx, CounterHalfLifeTime, 30, \ 2702 "half-life time of invocation counters (in secs)") \ 2703 \ 2704 develop(intx, CounterDecayMinIntervalLength, 500, \ 2705 "Min. ms. between invocation of CounterDecay") \ 2706 \ 2707 product(bool, AlwaysCompileLoopMethods, false, \ 2708 "when using recompilation, never interpret methods " \ 2709 "containing loops") \ 2710 \ 2711 product(bool, DontCompileHugeMethods, true, \ 2712 "don't compile methods > HugeMethodLimit") \ 2713 \ 2714 /* Bytecode escape analysis estimation. */ \ 2715 product(bool, EstimateArgEscape, true, \ 2716 "Analyze bytecodes to estimate escape state of arguments") \ 2717 \ 2718 product(intx, BCEATraceLevel, 0, \ 2719 "How much tracing to do of bytecode escape analysis estimates") \ 2720 \ 2721 product(intx, MaxBCEAEstimateLevel, 5, \ 2722 "Maximum number of nested calls that are analyzed by BC EA.") \ 2723 \ 2724 product(intx, MaxBCEAEstimateSize, 150, \ 2725 "Maximum bytecode size of a method to be analyzed by BC EA.") \ 2726 \ 2727 product(intx, AllocatePrefetchStyle, 1, \ 2728 "0 = no prefetch, " \ 2729 "1 = prefetch instructions for each allocation, " \ 2730 "2 = use TLAB watermark to gate allocation prefetch, " \ 2731 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2732 \ 2733 product(intx, AllocatePrefetchDistance, -1, \ 2734 "Distance to prefetch ahead of allocation pointer") \ 2735 \ 2736 product(intx, AllocatePrefetchLines, 1, \ 2737 "Number of lines to prefetch ahead of allocation pointer") \ 2738 \ 2739 product(intx, AllocatePrefetchStepSize, 16, \ 2740 "Step size in bytes of sequential prefetch instructions") \ 2741 \ 2742 product(intx, AllocatePrefetchInstr, 0, \ 2743 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2744 \ 2745 product(intx, ReadPrefetchInstr, 0, \ 2746 "Prefetch instruction to prefetch ahead") \ 2747 \ 2748 /* deoptimization */ \ 2749 develop(bool, TraceDeoptimization, false, \ 2750 "Trace deoptimization") \ 2751 \ 2752 develop(bool, DebugDeoptimization, false, \ 2753 "Tracing various information while debugging deoptimization") \ 2754 \ 2755 product(intx, SelfDestructTimer, 0, \ 2756 "Will cause VM to terminate after a given time (in minutes) " \ 2757 "(0 means off)") \ 2758 \ 2759 product(intx, MaxJavaStackTraceDepth, 1024, \ 2760 "Max. no. of lines in the stack trace for Java exceptions " \ 2761 "(0 means all)") \ 2762 \ 2763 develop(intx, GuaranteedSafepointInterval, 1000, \ 2764 "Guarantee a safepoint (at least) every so many milliseconds " \ 2765 "(0 means none)") \ 2766 \ 2767 product(intx, SafepointTimeoutDelay, 10000, \ 2768 "Delay in milliseconds for option SafepointTimeout") \ 2769 \ 2770 product(intx, NmethodSweepFraction, 4, \ 2771 "Number of invocations of sweeper to cover all nmethods") \ 2772 \ 2773 product(intx, NmethodSweepCheckInterval, 5, \ 2774 "Compilers wake up every n seconds to possibly sweep nmethods") \ 2775 \ 2776 notproduct(intx, MemProfilingInterval, 500, \ 2777 "Time between each invocation of the MemProfiler") \ 2778 \ 2779 develop(intx, MallocCatchPtr, -1, \ 2780 "Hit breakpoint when mallocing/freeing this pointer") \ 2781 \ 2782 notproduct(intx, AssertRepeat, 1, \ 2783 "number of times to evaluate expression in assert " \ 2784 "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \ 2785 \ 2786 notproduct(ccstrlist, SuppressErrorAt, "", \ 2787 "List of assertions (file:line) to muzzle") \ 2788 \ 2789 notproduct(uintx, HandleAllocationLimit, 1024, \ 2790 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 2791 "is used") \ 2792 \ 2793 develop(uintx, TotalHandleAllocationLimit, 1024, \ 2794 "Threshold for total handle allocation when " \ 2795 "+TraceHandleAllocation is used") \ 2796 \ 2797 develop(intx, StackPrintLimit, 100, \ 2798 "number of stack frames to print in VM-level stack dump") \ 2799 \ 2800 notproduct(intx, MaxElementPrintSize, 256, \ 2801 "maximum number of elements to print") \ 2802 \ 2803 notproduct(intx, MaxSubklassPrintSize, 4, \ 2804 "maximum number of subklasses to print when printing klass") \ 2805 \ 2806 product(intx, MaxInlineLevel, 9, \ 2807 "maximum number of nested calls that are inlined") \ 2808 \ 2809 product(intx, MaxRecursiveInlineLevel, 1, \ 2810 "maximum number of nested recursive calls that are inlined") \ 2811 \ 2812 product_pd(intx, InlineSmallCode, \ 2813 "Only inline already compiled methods if their code size is " \ 2814 "less than this") \ 2815 \ 2816 product(intx, MaxInlineSize, 35, \ 2817 "maximum bytecode size of a method to be inlined") \ 2818 \ 2819 product_pd(intx, FreqInlineSize, \ 2820 "maximum bytecode size of a frequent method to be inlined") \ 2821 \ 2822 product(intx, MaxTrivialSize, 6, \ 2823 "maximum bytecode size of a trivial method to be inlined") \ 2824 \ 2825 product(intx, MinInliningThreshold, 250, \ 2826 "min. invocation count a method needs to have to be inlined") \ 2827 \ 2828 develop(intx, AlignEntryCode, 4, \ 2829 "aligns entry code to specified value (in bytes)") \ 2830 \ 2831 develop(intx, MethodHistogramCutoff, 100, \ 2832 "cutoff value for method invoc. histogram (+CountCalls)") \ 2833 \ 2834 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 2835 "# of interpreted methods to show in profile") \ 2836 \ 2837 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 2838 "# of compiled methods to show in profile") \ 2839 \ 2840 develop(intx, ProfilerNumberOfStubMethods, 25, \ 2841 "# of stub methods to show in profile") \ 2842 \ 2843 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 2844 "# of runtime stub nodes to show in profile") \ 2845 \ 2846 product(intx, ProfileIntervalsTicks, 100, \ 2847 "# of ticks between printing of interval profile " \ 2848 "(+ProfileIntervals)") \ 2849 \ 2850 notproduct(intx, ScavengeALotInterval, 1, \ 2851 "Interval between which scavenge will occur with +ScavengeALot") \ 2852 \ 2853 notproduct(intx, FullGCALotInterval, 1, \ 2854 "Interval between which full gc will occur with +FullGCALot") \ 2855 \ 2856 notproduct(intx, FullGCALotStart, 0, \ 2857 "For which invocation to start FullGCAlot") \ 2858 \ 2859 notproduct(intx, FullGCALotDummies, 32*K, \ 2860 "Dummy object allocated with +FullGCALot, forcing all objects " \ 2861 "to move") \ 2862 \ 2863 develop(intx, DontYieldALotInterval, 10, \ 2864 "Interval between which yields will be dropped (milliseconds)") \ 2865 \ 2866 develop(intx, MinSleepInterval, 1, \ 2867 "Minimum sleep() interval (milliseconds) when " \ 2868 "ConvertSleepToYield is off (used for SOLARIS)") \ 2869 \ 2870 product(intx, EventLogLength, 2000, \ 2871 "maximum nof events in event log") \ 2872 \ 2873 develop(intx, ProfilerPCTickThreshold, 15, \ 2874 "Number of ticks in a PC buckets to be a hotspot") \ 2875 \ 2876 notproduct(intx, DeoptimizeALotInterval, 5, \ 2877 "Number of exits until DeoptimizeALot kicks in") \ 2878 \ 2879 notproduct(intx, ZombieALotInterval, 5, \ 2880 "Number of exits until ZombieALot kicks in") \ 2881 \ 2882 develop(bool, StressNonEntrant, false, \ 2883 "Mark nmethods non-entrant at registration") \ 2884 \ 2885 diagnostic(intx, MallocVerifyInterval, 0, \ 2886 "if non-zero, verify C heap after every N calls to " \ 2887 "malloc/realloc/free") \ 2888 \ 2889 diagnostic(intx, MallocVerifyStart, 0, \ 2890 "if non-zero, start verifying C heap after Nth call to " \ 2891 "malloc/realloc/free") \ 2892 \ 2893 product(intx, TypeProfileWidth, 2, \ 2894 "number of receiver types to record in call/cast profile") \ 2895 \ 2896 develop(intx, BciProfileWidth, 2, \ 2897 "number of return bci's to record in ret profile") \ 2898 \ 2899 product(intx, PerMethodRecompilationCutoff, 400, \ 2900 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 2901 \ 2902 product(intx, PerBytecodeRecompilationCutoff, 200, \ 2903 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 2904 \ 2905 product(intx, PerMethodTrapLimit, 100, \ 2906 "Limit on traps (of one kind) in a method (includes inlines)") \ 2907 \ 2908 product(intx, PerBytecodeTrapLimit, 4, \ 2909 "Limit on traps (of one kind) at a particular BCI") \ 2910 \ 2911 develop(intx, FreqCountInvocations, 1, \ 2912 "Scaling factor for branch frequencies (deprecated)") \ 2913 \ 2914 develop(intx, InlineFrequencyRatio, 20, \ 2915 "Ratio of call site execution to caller method invocation") \ 2916 \ 2917 develop_pd(intx, InlineFrequencyCount, \ 2918 "Count of call site execution necessary to trigger frequent " \ 2919 "inlining") \ 2920 \ 2921 develop(intx, InlineThrowCount, 50, \ 2922 "Force inlining of interpreted methods that throw this often") \ 2923 \ 2924 develop(intx, InlineThrowMaxSize, 200, \ 2925 "Force inlining of throwing methods smaller than this") \ 2926 \ 2927 product(intx, AliasLevel, 3, \ 2928 "0 for no aliasing, 1 for oop/field/static/array split, " \ 2929 "2 for class split, 3 for unique instances") \ 2930 \ 2931 develop(bool, VerifyAliases, false, \ 2932 "perform extra checks on the results of alias analysis") \ 2933 \ 2934 develop(intx, ProfilerNodeSize, 1024, \ 2935 "Size in K to allocate for the Profile Nodes of each thread") \ 2936 \ 2937 develop(intx, V8AtomicOperationUnderLockSpinCount, 50, \ 2938 "Number of times to spin wait on a v8 atomic operation lock") \ 2939 \ 2940 product(intx, ReadSpinIterations, 100, \ 2941 "Number of read attempts before a yield (spin inner loop)") \ 2942 \ 2943 product_pd(intx, PreInflateSpin, \ 2944 "Number of times to spin wait before inflation") \ 2945 \ 2946 product(intx, PreBlockSpin, 10, \ 2947 "Number of times to spin in an inflated lock before going to " \ 2948 "an OS lock") \ 2949 \ 2950 /* gc parameters */ \ 2951 product(uintx, InitialHeapSize, 0, \ 2952 "Initial heap size (in bytes); zero means OldSize + NewSize") \ 2953 \ 2954 product(uintx, MaxHeapSize, ScaleForWordSize(96*M), \ 2955 "Maximum heap size (in bytes)") \ 2956 \ 2957 product(uintx, OldSize, ScaleForWordSize(4*M), \ 2958 "Initial tenured generation size (in bytes)") \ 2959 \ 2960 product(uintx, NewSize, ScaleForWordSize(1*M), \ 2961 "Initial new generation size (in bytes)") \ 2962 \ 2963 product(uintx, MaxNewSize, max_uintx, \ 2964 "Maximum new generation size (in bytes), max_uintx means set " \ 2965 "ergonomically") \ 2966 \ 2967 product(uintx, PretenureSizeThreshold, 0, \ 2968 "Maximum size in bytes of objects allocated in DefNew " \ 2969 "generation; zero means no maximum") \ 2970 \ 2971 product(uintx, TLABSize, 0, \ 2972 "Starting TLAB size (in bytes); zero means set ergonomically") \ 2973 \ 2974 product(uintx, MinTLABSize, 2*K, \ 2975 "Minimum allowed TLAB size (in bytes)") \ 2976 \ 2977 product(uintx, TLABAllocationWeight, 35, \ 2978 "Allocation averaging weight") \ 2979 \ 2980 product(uintx, TLABWasteTargetPercent, 1, \ 2981 "Percentage of Eden that can be wasted") \ 2982 \ 2983 product(uintx, TLABRefillWasteFraction, 64, \ 2984 "Max TLAB waste at a refill (internal fragmentation)") \ 2985 \ 2986 product(uintx, TLABWasteIncrement, 4, \ 2987 "Increment allowed waste at slow allocation") \ 2988 \ 2989 product(intx, SurvivorRatio, 8, \ 2990 "Ratio of eden/survivor space size") \ 2991 \ 2992 product(intx, NewRatio, 2, \ 2993 "Ratio of new/old generation sizes") \ 2994 \ 2995 product(uintx, MaxLiveObjectEvacuationRatio, 100, \ 2996 "Max percent of eden objects that will be live at scavenge") \ 2997 \ 2998 product_pd(uintx, NewSizeThreadIncrease, \ 2999 "Additional size added to desired new generation size per " \ 3000 "non-daemon thread (in bytes)") \ 3001 \ 3002 product_pd(uintx, PermSize, \ 3003 "Initial size of permanent generation (in bytes)") \ 3004 \ 3005 product_pd(uintx, MaxPermSize, \ 3006 "Maximum size of permanent generation (in bytes)") \ 3007 \ 3008 product(uintx, MinHeapFreeRatio, 40, \ 3009 "Min percentage of heap free after GC to avoid expansion") \ 3010 \ 3011 product(uintx, MaxHeapFreeRatio, 70, \ 3012 "Max percentage of heap free after GC to avoid shrinking") \ 3013 \ 3014 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3015 "Number of milliseconds per MB of free space in the heap") \ 3016 \ 3017 product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3018 "Min change in heap space due to GC (in bytes)") \ 3019 \ 3020 product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K), \ 3021 "Min expansion of permanent heap (in bytes)") \ 3022 \ 3023 product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M), \ 3024 "Max expansion of permanent heap without full GC (in bytes)") \ 3025 \ 3026 product(intx, QueuedAllocationWarningCount, 0, \ 3027 "Number of times an allocation that queues behind a GC " \ 3028 "will retry before printing a warning") \ 3029 \ 3030 diagnostic(uintx, VerifyGCStartAt, 0, \ 3031 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3032 \ 3033 diagnostic(intx, VerifyGCLevel, 0, \ 3034 "Generation level at which to start +VerifyBefore/AfterGC") \ 3035 \ 3036 develop(uintx, ExitAfterGCNum, 0, \ 3037 "If non-zero, exit after this GC.") \ 3038 \ 3039 product(intx, MaxTenuringThreshold, 15, \ 3040 "Maximum value for tenuring threshold") \ 3041 \ 3042 product(intx, InitialTenuringThreshold, 7, \ 3043 "Initial value for tenuring threshold") \ 3044 \ 3045 product(intx, TargetSurvivorRatio, 50, \ 3046 "Desired percentage of survivor space used after scavenge") \ 3047 \ 3048 product(uintx, MarkSweepDeadRatio, 5, \ 3049 "Percentage (0-100) of the old gen allowed as dead wood." \ 3050 "Serial mark sweep treats this as both the min and max value." \ 3051 "CMS uses this value only if it falls back to mark sweep." \ 3052 "Par compact uses a variable scale based on the density of the" \ 3053 "generation and treats this as the max value when the heap is" \ 3054 "either completely full or completely empty. Par compact also" \ 3055 "has a smaller default value; see arguments.cpp.") \ 3056 \ 3057 product(uintx, PermMarkSweepDeadRatio, 20, \ 3058 "Percentage (0-100) of the perm gen allowed as dead wood." \ 3059 "See MarkSweepDeadRatio for collector-specific comments.") \ 3060 \ 3061 product(intx, MarkSweepAlwaysCompactCount, 4, \ 3062 "How often should we fully compact the heap (ignoring the dead " \ 3063 "space parameters)") \ 3064 \ 3065 product(intx, PrintCMSStatistics, 0, \ 3066 "Statistics for CMS") \ 3067 \ 3068 product(bool, PrintCMSInitiationStatistics, false, \ 3069 "Statistics for initiating a CMS collection") \ 3070 \ 3071 product(intx, PrintFLSStatistics, 0, \ 3072 "Statistics for CMS' FreeListSpace") \ 3073 \ 3074 product(intx, PrintFLSCensus, 0, \ 3075 "Census for CMS' FreeListSpace") \ 3076 \ 3077 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3078 "Delay in ms between expansion and allocation") \ 3079 \ 3080 product(intx, DeferThrSuspendLoopCount, 4000, \ 3081 "(Unstable) Number of times to iterate in safepoint loop " \ 3082 " before blocking VM threads ") \ 3083 \ 3084 product(intx, DeferPollingPageLoopCount, -1, \ 3085 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3086 "before changing safepoint polling page to RO ") \ 3087 \ 3088 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3089 \ 3090 product(bool, UseDepthFirstScavengeOrder, true, \ 3091 "true: the scavenge order will be depth-first, " \ 3092 "false: the scavenge order will be breadth-first") \ 3093 \ 3094 product(bool, PSChunkLargeArrays, true, \ 3095 "true: process large arrays in chunks") \ 3096 \ 3097 product(uintx, GCDrainStackTargetSize, 64, \ 3098 "how many entries we'll try to leave on the stack during " \ 3099 "parallel GC") \ 3100 \ 3101 /* stack parameters */ \ 3102 product_pd(intx, StackYellowPages, \ 3103 "Number of yellow zone (recoverable overflows) pages") \ 3104 \ 3105 product_pd(intx, StackRedPages, \ 3106 "Number of red zone (unrecoverable overflows) pages") \ 3107 \ 3108 product_pd(intx, StackShadowPages, \ 3109 "Number of shadow zone (for overflow checking) pages" \ 3110 " this should exceed the depth of the VM and native call stack") \ 3111 \ 3112 product_pd(intx, ThreadStackSize, \ 3113 "Thread Stack Size (in Kbytes)") \ 3114 \ 3115 product_pd(intx, VMThreadStackSize, \ 3116 "Non-Java Thread Stack Size (in Kbytes)") \ 3117 \ 3118 product_pd(intx, CompilerThreadStackSize, \ 3119 "Compiler Thread Stack Size (in Kbytes)") \ 3120 \ 3121 develop_pd(uintx, JVMInvokeMethodSlack, \ 3122 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3123 \ 3124 product(uintx, ThreadSafetyMargin, 50*M, \ 3125 "Thread safety margin is used on fixed-stack LinuxThreads (on " \ 3126 "Linux/x86 only) to prevent heap-stack collision. Set to 0 to " \ 3127 "disable this feature") \ 3128 \ 3129 /* code cache parameters */ \ 3130 develop(uintx, CodeCacheSegmentSize, 64, \ 3131 "Code cache segment size (in bytes) - smallest unit of " \ 3132 "allocation") \ 3133 \ 3134 develop_pd(intx, CodeEntryAlignment, \ 3135 "Code entry alignment for generated code (in bytes)") \ 3136 \ 3137 product_pd(intx, OptoLoopAlignment, \ 3138 "Align inner loops to zero relative to this modulus") \ 3139 \ 3140 product_pd(uintx, InitialCodeCacheSize, \ 3141 "Initial code cache size (in bytes)") \ 3142 \ 3143 product_pd(uintx, ReservedCodeCacheSize, \ 3144 "Reserved code cache size (in bytes) - maximum code cache size") \ 3145 \ 3146 product(uintx, CodeCacheMinimumFreeSpace, 500*K, \ 3147 "When less than X space left, we stop compiling.") \ 3148 \ 3149 product_pd(uintx, CodeCacheExpansionSize, \ 3150 "Code cache expansion size (in bytes)") \ 3151 \ 3152 develop_pd(uintx, CodeCacheMinBlockLength, \ 3153 "Minimum number of segments in a code cache block.") \ 3154 \ 3155 notproduct(bool, ExitOnFullCodeCache, false, \ 3156 "Exit the VM if we fill the code cache.") \ 3157 \ 3158 product(bool, UseCodeCacheFlushing, false, \ 3159 "Attempt to clean the code cache before shutting off compiler") \ 3160 \ 3161 product(intx, MinCodeCacheFlushingInterval, 30, \ 3162 "Min number of seconds between code cache cleaning sessions") \ 3163 \ 3164 product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \ 3165 "When less than X space left, start code cache cleaning") \ 3166 \ 3167 /* interpreter debugging */ \ 3168 develop(intx, BinarySwitchThreshold, 5, \ 3169 "Minimal number of lookupswitch entries for rewriting to binary " \ 3170 "switch") \ 3171 \ 3172 develop(intx, StopInterpreterAt, 0, \ 3173 "Stops interpreter execution at specified bytecode number") \ 3174 \ 3175 develop(intx, TraceBytecodesAt, 0, \ 3176 "Traces bytecodes starting with specified bytecode number") \ 3177 \ 3178 /* compiler interface */ \ 3179 develop(intx, CIStart, 0, \ 3180 "the id of the first compilation to permit") \ 3181 \ 3182 develop(intx, CIStop, -1, \ 3183 "the id of the last compilation to permit") \ 3184 \ 3185 develop(intx, CIStartOSR, 0, \ 3186 "the id of the first osr compilation to permit " \ 3187 "(CICountOSR must be on)") \ 3188 \ 3189 develop(intx, CIStopOSR, -1, \ 3190 "the id of the last osr compilation to permit " \ 3191 "(CICountOSR must be on)") \ 3192 \ 3193 develop(intx, CIBreakAtOSR, -1, \ 3194 "id of osr compilation to break at") \ 3195 \ 3196 develop(intx, CIBreakAt, -1, \ 3197 "id of compilation to break at") \ 3198 \ 3199 product(ccstrlist, CompileOnly, "", \ 3200 "List of methods (pkg/class.name) to restrict compilation to") \ 3201 \ 3202 product(ccstr, CompileCommandFile, NULL, \ 3203 "Read compiler commands from this file [.hotspot_compiler]") \ 3204 \ 3205 product(ccstrlist, CompileCommand, "", \ 3206 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3207 \ 3208 product(bool, CICompilerCountPerCPU, false, \ 3209 "1 compiler thread for log(N CPUs)") \ 3210 \ 3211 develop(intx, CIFireOOMAt, -1, \ 3212 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3213 "(non-negative value throws OOM after this many CI accesses " \ 3214 "in each compile)") \ 3215 \ 3216 develop(intx, CIFireOOMAtDelay, -1, \ 3217 "Wait for this many CI accesses to occur in all compiles before " \ 3218 "beginning to throw OutOfMemoryErrors in each compile") \ 3219 \ 3220 notproduct(bool, CIObjectFactoryVerify, false, \ 3221 "enable potentially expensive verification in ciObjectFactory") \ 3222 \ 3223 /* Priorities */ \ 3224 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3225 \ 3226 product(intx, ThreadPriorityPolicy, 0, \ 3227 "0 : Normal. "\ 3228 " VM chooses priorities that are appropriate for normal "\ 3229 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3230 " to normal native priority. Java priorities below NORM_PRIORITY"\ 3231 " map to lower native priority values. On Windows applications"\ 3232 " are allowed to use higher native priorities. However, with "\ 3233 " ThreadPriorityPolicy=0, VM will not use the highest possible"\ 3234 " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\ 3235 " interfere with system threads. On Linux thread priorities "\ 3236 " are ignored because the OS does not support static priority "\ 3237 " in SCHED_OTHER scheduling class which is the only choice for"\ 3238 " non-root, non-realtime applications. "\ 3239 "1 : Aggressive. "\ 3240 " Java thread priorities map over to the entire range of "\ 3241 " native thread priorities. Higher Java thread priorities map "\ 3242 " to higher native thread priorities. This policy should be "\ 3243 " used with care, as sometimes it can cause performance "\ 3244 " degradation in the application and/or the entire system. On "\ 3245 " Linux this policy requires root privilege.") \ 3246 \ 3247 product(bool, ThreadPriorityVerbose, false, \ 3248 "print priority changes") \ 3249 \ 3250 product(intx, DefaultThreadPriority, -1, \ 3251 "what native priority threads run at if not specified elsewhere (-1 means no change)") \ 3252 \ 3253 product(intx, CompilerThreadPriority, -1, \ 3254 "what priority should compiler threads run at (-1 means no change)") \ 3255 \ 3256 product(intx, VMThreadPriority, -1, \ 3257 "what priority should VM threads run at (-1 means no change)") \ 3258 \ 3259 product(bool, CompilerThreadHintNoPreempt, true, \ 3260 "(Solaris only) Give compiler threads an extra quanta") \ 3261 \ 3262 product(bool, VMThreadHintNoPreempt, false, \ 3263 "(Solaris only) Give VM thread an extra quanta") \ 3264 \ 3265 product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3266 product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3267 product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3268 product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3269 product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3270 product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3271 product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3272 product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3273 product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \ 3274 product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \ 3275 \ 3276 /* compiler debugging */ \ 3277 notproduct(intx, CompileTheWorldStartAt, 1, \ 3278 "First class to consider when using +CompileTheWorld") \ 3279 \ 3280 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3281 "Last class to consider when using +CompileTheWorld") \ 3282 \ 3283 develop(intx, NewCodeParameter, 0, \ 3284 "Testing Only: Create a dedicated integer parameter before " \ 3285 "putback") \ 3286 \ 3287 /* new oopmap storage allocation */ \ 3288 develop(intx, MinOopMapAllocation, 8, \ 3289 "Minimum number of OopMap entries in an OopMapSet") \ 3290 \ 3291 /* Background Compilation */ \ 3292 develop(intx, LongCompileThreshold, 50, \ 3293 "Used with +TraceLongCompiles") \ 3294 \ 3295 product(intx, StarvationMonitorInterval, 200, \ 3296 "Pause between each check in ms") \ 3297 \ 3298 /* recompilation */ \ 3299 product_pd(intx, CompileThreshold, \ 3300 "number of interpreted method invocations before (re-)compiling") \ 3301 \ 3302 product_pd(intx, BackEdgeThreshold, \ 3303 "Interpreter Back edge threshold at which an OSR compilation is invoked")\ 3304 \ 3305 product(intx, Tier1BytecodeLimit, 10, \ 3306 "Must have at least this many bytecodes before tier1" \ 3307 "invocation counters are used") \ 3308 \ 3309 product_pd(intx, Tier2CompileThreshold, \ 3310 "threshold at which a tier 2 compilation is invoked") \ 3311 \ 3312 product_pd(intx, Tier2BackEdgeThreshold, \ 3313 "Back edge threshold at which a tier 2 compilation is invoked") \ 3314 \ 3315 product_pd(intx, Tier3CompileThreshold, \ 3316 "threshold at which a tier 3 compilation is invoked") \ 3317 \ 3318 product_pd(intx, Tier3BackEdgeThreshold, \ 3319 "Back edge threshold at which a tier 3 compilation is invoked") \ 3320 \ 3321 product_pd(intx, Tier4CompileThreshold, \ 3322 "threshold at which a tier 4 compilation is invoked") \ 3323 \ 3324 product_pd(intx, Tier4BackEdgeThreshold, \ 3325 "Back edge threshold at which a tier 4 compilation is invoked") \ 3326 \ 3327 product_pd(bool, TieredCompilation, \ 3328 "Enable two-tier compilation") \ 3329 \ 3330 product(bool, StressTieredRuntime, false, \ 3331 "Alternate client and server compiler on compile requests") \ 3332 \ 3333 product_pd(intx, OnStackReplacePercentage, \ 3334 "NON_TIERED number of method invocations/branches (expressed as %"\ 3335 "of CompileThreshold) before (re-)compiling OSR code") \ 3336 \ 3337 product(intx, InterpreterProfilePercentage, 33, \ 3338 "NON_TIERED number of method invocations/branches (expressed as %"\ 3339 "of CompileThreshold) before profiling in the interpreter") \ 3340 \ 3341 develop(intx, MaxRecompilationSearchLength, 10, \ 3342 "max. # frames to inspect searching for recompilee") \ 3343 \ 3344 develop(intx, MaxInterpretedSearchLength, 3, \ 3345 "max. # interp. frames to skip when searching for recompilee") \ 3346 \ 3347 develop(intx, DesiredMethodLimit, 8000, \ 3348 "desired max. method size (in bytecodes) after inlining") \ 3349 \ 3350 develop(intx, HugeMethodLimit, 8000, \ 3351 "don't compile methods larger than this if " \ 3352 "+DontCompileHugeMethods") \ 3353 \ 3354 /* New JDK 1.4 reflection implementation */ \ 3355 \ 3356 develop(bool, UseNewReflection, true, \ 3357 "Temporary flag for transition to reflection based on dynamic " \ 3358 "bytecode generation in 1.4; can no longer be turned off in 1.4 " \ 3359 "JDK, and is unneeded in 1.3 JDK, but marks most places VM " \ 3360 "changes were needed") \ 3361 \ 3362 develop(bool, VerifyReflectionBytecodes, false, \ 3363 "Force verification of 1.4 reflection bytecodes. Does not work " \ 3364 "in situations like that described in 4486457 or for " \ 3365 "constructors generated for serialization, so can not be enabled "\ 3366 "in product.") \ 3367 \ 3368 product(bool, ReflectionWrapResolutionErrors, true, \ 3369 "Temporary flag for transition to AbstractMethodError wrapped " \ 3370 "in InvocationTargetException. See 6531596") \ 3371 \ 3372 \ 3373 develop(intx, FastSuperclassLimit, 8, \ 3374 "Depth of hardwired instanceof accelerator array") \ 3375 \ 3376 /* Properties for Java libraries */ \ 3377 \ 3378 product(intx, MaxDirectMemorySize, -1, \ 3379 "Maximum total size of NIO direct-buffer allocations") \ 3380 \ 3381 /* temporary developer defined flags */ \ 3382 \ 3383 diagnostic(bool, UseNewCode, false, \ 3384 "Testing Only: Use the new version while testing") \ 3385 \ 3386 diagnostic(bool, UseNewCode2, false, \ 3387 "Testing Only: Use the new version while testing") \ 3388 \ 3389 diagnostic(bool, UseNewCode3, false, \ 3390 "Testing Only: Use the new version while testing") \ 3391 \ 3392 /* flags for performance data collection */ \ 3393 \ 3394 product(bool, UsePerfData, true, \ 3395 "Flag to disable jvmstat instrumentation for performance testing" \ 3396 "and problem isolation purposes.") \ 3397 \ 3398 product(bool, PerfDataSaveToFile, false, \ 3399 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3400 \ 3401 product(ccstr, PerfDataSaveFile, NULL, \ 3402 "Save PerfData memory to the specified absolute pathname," \ 3403 "%p in the file name if present will be replaced by pid") \ 3404 \ 3405 product(intx, PerfDataSamplingInterval, 50 /*ms*/, \ 3406 "Data sampling interval in milliseconds") \ 3407 \ 3408 develop(bool, PerfTraceDataCreation, false, \ 3409 "Trace creation of Performance Data Entries") \ 3410 \ 3411 develop(bool, PerfTraceMemOps, false, \ 3412 "Trace PerfMemory create/attach/detach calls") \ 3413 \ 3414 product(bool, PerfDisableSharedMem, false, \ 3415 "Store performance data in standard memory") \ 3416 \ 3417 product(intx, PerfDataMemorySize, 32*K, \ 3418 "Size of performance data memory region. Will be rounded " \ 3419 "up to a multiple of the native os page size.") \ 3420 \ 3421 product(intx, PerfMaxStringConstLength, 1024, \ 3422 "Maximum PerfStringConstant string length before truncation") \ 3423 \ 3424 product(bool, PerfAllowAtExitRegistration, false, \ 3425 "Allow registration of atexit() methods") \ 3426 \ 3427 product(bool, PerfBypassFileSystemCheck, false, \ 3428 "Bypass Win32 file system criteria checks (Windows Only)") \ 3429 \ 3430 product(intx, UnguardOnExecutionViolation, 0, \ 3431 "Unguard page and retry on no-execute fault (Win32 only)" \ 3432 "0=off, 1=conservative, 2=aggressive") \ 3433 \ 3434 /* Serviceability Support */ \ 3435 \ 3436 product(bool, ManagementServer, false, \ 3437 "Create JMX Management Server") \ 3438 \ 3439 product(bool, DisableAttachMechanism, false, \ 3440 "Disable mechanism that allows tools to attach to this VM") \ 3441 \ 3442 product(bool, StartAttachListener, false, \ 3443 "Always start Attach Listener at VM startup") \ 3444 \ 3445 manageable(bool, PrintConcurrentLocks, false, \ 3446 "Print java.util.concurrent locks in thread dump") \ 3447 \ 3448 /* Shared spaces */ \ 3449 \ 3450 product(bool, UseSharedSpaces, true, \ 3451 "Use shared spaces in the permanent generation") \ 3452 \ 3453 product(bool, RequireSharedSpaces, false, \ 3454 "Require shared spaces in the permanent generation") \ 3455 \ 3456 product(bool, ForceSharedSpaces, false, \ 3457 "Require shared spaces in the permanent generation") \ 3458 \ 3459 product(bool, DumpSharedSpaces, false, \ 3460 "Special mode: JVM reads a class list, loads classes, builds " \ 3461 "shared spaces, and dumps the shared spaces to a file to be " \ 3462 "used in future JVM runs.") \ 3463 \ 3464 product(bool, PrintSharedSpaces, false, \ 3465 "Print usage of shared spaces") \ 3466 \ 3467 product(uintx, SharedDummyBlockSize, 512*M, \ 3468 "Size of dummy block used to shift heap addresses (in bytes)") \ 3469 \ 3470 product(uintx, SharedReadWriteSize, 12*M, \ 3471 "Size of read-write space in permanent generation (in bytes)") \ 3472 \ 3473 product(uintx, SharedReadOnlySize, 10*M, \ 3474 "Size of read-only space in permanent generation (in bytes)") \ 3475 \ 3476 product(uintx, SharedMiscDataSize, 4*M, \ 3477 "Size of the shared data area adjacent to the heap (in bytes)") \ 3478 \ 3479 product(uintx, SharedMiscCodeSize, 4*M, \ 3480 "Size of the shared code area adjacent to the heap (in bytes)") \ 3481 \ 3482 diagnostic(bool, SharedOptimizeColdStart, true, \ 3483 "At dump time, order shared objects to achieve better " \ 3484 "cold startup time.") \ 3485 \ 3486 develop(intx, SharedOptimizeColdStartPolicy, 2, \ 3487 "Reordering policy for SharedOptimizeColdStart " \ 3488 "0=favor classload-time locality, 1=balanced, " \ 3489 "2=favor runtime locality") \ 3490 \ 3491 diagnostic(bool, SharedSkipVerify, false, \ 3492 "Skip assert() and verify() which page-in unwanted shared " \ 3493 "objects. ") \ 3494 \ 3495 product(bool, AnonymousClasses, false, \ 3496 "support sun.misc.Unsafe.defineAnonymousClass") \ 3497 \ 3498 experimental(bool, EnableMethodHandles, false, \ 3499 "support method handles (true by default under JSR 292)") \ 3500 \ 3501 diagnostic(intx, MethodHandlePushLimit, 3, \ 3502 "number of additional stack slots a method handle may push") \ 3503 \ 3504 develop(bool, TraceMethodHandles, false, \ 3505 "trace internal method handle operations") \ 3506 \ 3507 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 3508 "perform extra checks when constructing method handles") \ 3509 \ 3510 diagnostic(bool, OptimizeMethodHandles, true, \ 3511 "when constructing method handles, try to improve them") \ 3512 \ 3513 experimental(bool, TrustFinalNonStaticFields, false, \ 3514 "trust final non-static declarations for constant folding") \ 3515 \ 3516 experimental(bool, EnableInvokeDynamic, false, \ 3517 "recognize the invokedynamic instruction") \ 3518 \ 3519 develop(bool, TraceInvokeDynamic, false, \ 3520 "trace internal invoke dynamic operations") \ 3521 \ 3522 diagnostic(bool, PauseAtStartup, false, \ 3523 "Causes the VM to pause at startup time and wait for the pause " \ 3524 "file to be removed (default: ./vm.paused.<pid>)") \ 3525 \ 3526 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 3527 "The file to create and for whose removal to await when pausing " \ 3528 "at startup. (default: ./vm.paused.<pid>)") \ 3529 \ 3530 product(bool, ExtendedDTraceProbes, false, \ 3531 "Enable performance-impacting dtrace probes") \ 3532 \ 3533 product(bool, DTraceMethodProbes, false, \ 3534 "Enable dtrace probes for method-entry and method-exit") \ 3535 \ 3536 product(bool, DTraceAllocProbes, false, \ 3537 "Enable dtrace probes for object allocation") \ 3538 \ 3539 product(bool, DTraceMonitorProbes, false, \ 3540 "Enable dtrace probes for monitor events") \ 3541 \ 3542 product(bool, RelaxAccessControlCheck, false, \ 3543 "Relax the access control checks in the verifier") \ 3544 \ 3545 diagnostic(bool, PrintDTraceDOF, false, \ 3546 "Print the DTrace DOF passed to the system for JSDT probes") \ 3547 \ 3548 product(bool, UseVMInterruptibleIO, false, \ 3549 "(Unstable, Solaris-specific) Thread interrupt before or with " \ 3550 "EINTR for I/O operations results in OS_INTRPT. The default value"\ 3551 " of this flag is true for JDK 6 and earliers") 3552 3553 3554/* 3555 * Macros for factoring of globals 3556 */ 3557 3558// Interface macros 3559#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3560#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 3561#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 3562#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 3563#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 3564#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 3565#ifdef PRODUCT 3566#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 3567#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 3568#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) 3569#else 3570#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 3571#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 3572#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3573#endif 3574// Special LP64 flags, product only needed for now. 3575#ifdef _LP64 3576#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 3577#else 3578#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 3579#endif // _LP64 3580 3581// Implementation macros 3582#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 3583#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 3584#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 3585#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 3586#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 3587#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 3588#ifdef PRODUCT 3589#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */ 3590#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */ 3591#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 3592#else 3593#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 3594#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 3595#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 3596#endif 3597#ifdef _LP64 3598#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 3599#else 3600#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 3601#endif // _LP64 3602 3603RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG) 3604 3605RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG) 3606