--- a/hotspot/src/share/vm/runtime/globals.hpp Wed Oct 16 10:52:41 2013 +0200
+++ b/hotspot/src/share/vm/runtime/globals.hpp Tue Nov 05 17:38:04 2013 -0800
@@ -208,29 +208,49 @@
typedef const char* ccstr;
typedef const char* ccstrlist; // represents string arguments which accumulate
-enum FlagValueOrigin {
- DEFAULT = 0,
- COMMAND_LINE = 1,
- ENVIRON_VAR = 2,
- CONFIG_FILE = 3,
- MANAGEMENT = 4,
- ERGONOMIC = 5,
- ATTACH_ON_DEMAND = 6,
- INTERNAL = 99
-};
+struct Flag {
+ enum Flags {
+ // value origin
+ DEFAULT = 0,
+ COMMAND_LINE = 1,
+ ENVIRON_VAR = 2,
+ CONFIG_FILE = 3,
+ MANAGEMENT = 4,
+ ERGONOMIC = 5,
+ ATTACH_ON_DEMAND = 6,
+ INTERNAL = 7,
+
+ LAST_VALUE_ORIGIN = INTERNAL,
+ VALUE_ORIGIN_BITS = 4,
+ VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS),
-struct Flag {
- const char *type;
- const char *name;
- void* addr;
+ // flag kind
+ KIND_PRODUCT = 1 << 4,
+ KIND_MANAGEABLE = 1 << 5,
+ KIND_DIAGNOSTIC = 1 << 6,
+ KIND_EXPERIMENTAL = 1 << 7,
+ KIND_NOT_PRODUCT = 1 << 8,
+ KIND_DEVELOP = 1 << 9,
+ KIND_PLATFORM_DEPENDENT = 1 << 10,
+ KIND_READ_WRITE = 1 << 11,
+ KIND_C1 = 1 << 12,
+ KIND_C2 = 1 << 13,
+ KIND_ARCH = 1 << 14,
+ KIND_SHARK = 1 << 15,
+ KIND_LP64_PRODUCT = 1 << 16,
+ KIND_COMMERCIAL = 1 << 17,
- NOT_PRODUCT(const char *doc;)
+ KIND_MASK = ~VALUE_ORIGIN_MASK
+ };
- const char *kind;
- FlagValueOrigin origin;
+ const char* _type;
+ const char* _name;
+ void* _addr;
+ NOT_PRODUCT(const char* _doc;)
+ Flags _flags;
// points to all Flags static array
- static Flag *flags;
+ static Flag* flags;
// number of flags
static size_t numFlags;
@@ -238,30 +258,50 @@
static Flag* find_flag(const char* name, size_t length, bool allow_locked = false);
static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false);
- bool is_bool() const { return strcmp(type, "bool") == 0; }
- bool get_bool() const { return *((bool*) addr); }
- void set_bool(bool value) { *((bool*) addr) = value; }
+ void check_writable();
+
+ bool is_bool() const;
+ bool get_bool() const;
+ void set_bool(bool value);
+
+ bool is_intx() const;
+ intx get_intx() const;
+ void set_intx(intx value);
- bool is_intx() const { return strcmp(type, "intx") == 0; }
- intx get_intx() const { return *((intx*) addr); }
- void set_intx(intx value) { *((intx*) addr) = value; }
+ bool is_uintx() const;
+ uintx get_uintx() const;
+ void set_uintx(uintx value);
- bool is_uintx() const { return strcmp(type, "uintx") == 0; }
- uintx get_uintx() const { return *((uintx*) addr); }
- void set_uintx(uintx value) { *((uintx*) addr) = value; }
+ bool is_uint64_t() const;
+ uint64_t get_uint64_t() const;
+ void set_uint64_t(uint64_t value);
+
+ bool is_double() const;
+ double get_double() const;
+ void set_double(double value);
- bool is_uint64_t() const { return strcmp(type, "uint64_t") == 0; }
- uint64_t get_uint64_t() const { return *((uint64_t*) addr); }
- void set_uint64_t(uint64_t value) { *((uint64_t*) addr) = value; }
+ bool is_ccstr() const;
+ bool ccstr_accumulates() const;
+ ccstr get_ccstr() const;
+ void set_ccstr(ccstr value);
+
+ Flags get_origin();
+ void set_origin(Flags origin);
- bool is_double() const { return strcmp(type, "double") == 0; }
- double get_double() const { return *((double*) addr); }
- void set_double(double value) { *((double*) addr) = value; }
+ bool is_default();
+ bool is_ergonomic();
+ bool is_command_line();
- bool is_ccstr() const { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
- bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
- ccstr get_ccstr() const { return *((ccstr*) addr); }
- void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
+ bool is_product() const;
+ bool is_manageable() const;
+ bool is_diagnostic() const;
+ bool is_experimental() const;
+ bool is_notproduct() const;
+ bool is_develop() const;
+ bool is_read_write() const;
+ bool is_commercial() const;
+
+ bool is_constant_in_binary() const;
bool is_unlocker() const;
bool is_unlocked() const;
@@ -277,6 +317,7 @@
void get_locked_message_ext(char*, int) const;
void print_on(outputStream* st, bool withComments = false );
+ void print_kind(outputStream* st);
void print_as_flag(outputStream* st);
};
@@ -324,33 +365,33 @@
public:
static bool boolAt(char* name, size_t len, bool* value);
static bool boolAt(char* name, bool* value) { return boolAt(name, strlen(name), value); }
- static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
- static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin) { return boolAtPut(name, strlen(name), value, origin); }
+ static bool boolAtPut(char* name, size_t len, bool* value, Flag::Flags origin);
+ static bool boolAtPut(char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); }
static bool intxAt(char* name, size_t len, intx* value);
static bool intxAt(char* name, intx* value) { return intxAt(name, strlen(name), value); }
- static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
- static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin) { return intxAtPut(name, strlen(name), value, origin); }
+ static bool intxAtPut(char* name, size_t len, intx* value, Flag::Flags origin);
+ static bool intxAtPut(char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); }
static bool uintxAt(char* name, size_t len, uintx* value);
static bool uintxAt(char* name, uintx* value) { return uintxAt(name, strlen(name), value); }
- static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
- static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
+ static bool uintxAtPut(char* name, size_t len, uintx* value, Flag::Flags origin);
+ static bool uintxAtPut(char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); }
static bool uint64_tAt(char* name, size_t len, uint64_t* value);
static bool uint64_tAt(char* name, uint64_t* value) { return uint64_tAt(name, strlen(name), value); }
- static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, FlagValueOrigin origin);
- static bool uint64_tAtPut(char* name, uint64_t* value, FlagValueOrigin origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
+ static bool uint64_tAtPut(char* name, size_t len, uint64_t* value, Flag::Flags origin);
+ static bool uint64_tAtPut(char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); }
static bool doubleAt(char* name, size_t len, double* value);
static bool doubleAt(char* name, double* value) { return doubleAt(name, strlen(name), value); }
- static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
- static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
+ static bool doubleAtPut(char* name, size_t len, double* value, Flag::Flags origin);
+ static bool doubleAtPut(char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); }
static bool ccstrAt(char* name, size_t len, ccstr* value);
static bool ccstrAt(char* name, ccstr* value) { return ccstrAt(name, strlen(name), value); }
- static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
- static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
+ static bool ccstrAtPut(char* name, size_t len, ccstr* value, Flag::Flags origin);
+ static bool ccstrAtPut(char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); }
// Returns false if name is not a command line flag.
static bool wasSetOnCmdline(const char* name, bool* value);
@@ -454,21 +495,21 @@
#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
\
lp64_product(bool, UseCompressedOops, false, \
- "Use 32-bit object references in 64-bit VM " \
- "lp64_product means flag is always constant in 32 bit VM") \
- \
- lp64_product(bool, UseCompressedKlassPointers, false, \
- "Use 32-bit klass pointers in 64-bit VM " \
- "lp64_product means flag is always constant in 32 bit VM") \
+ "Use 32-bit object references in 64-bit VM. " \
+ "lp64_product means flag is always constant in 32 bit VM") \
+ \
+ lp64_product(bool, UseCompressedClassPointers, false, \
+ "Use 32-bit class pointers in 64-bit VM. " \
+ "lp64_product means flag is always constant in 32 bit VM") \
\
notproduct(bool, CheckCompressedOops, true, \
- "generate checks in encoding/decoding code in debug VM") \
+ "Generate checks in encoding/decoding code in debug VM") \
\
product_pd(uintx, HeapBaseMinAddress, \
- "OS specific low limit for heap base address") \
+ "OS specific low limit for heap base address") \
\
diagnostic(bool, PrintCompressedOopsMode, false, \
- "Print compressed oops base address and encoding mode") \
+ "Print compressed oops base address and encoding mode") \
\
lp64_product(intx, ObjectAlignmentInBytes, 8, \
"Default object alignment in bytes, 8 is minimum") \
@@ -490,7 +531,7 @@
"Use lwsync instruction if true, else use slower sync") \
\
develop(bool, CleanChunkPoolAsync, falseInEmbedded, \
- "Whether to clean the chunk pool asynchronously") \
+ "Clean the chunk pool asynchronously") \
\
/* Temporary: See 6948537 */ \
experimental(bool, UseMemSetInBOT, true, \
@@ -500,10 +541,12 @@
"Enable normal processing of flags relating to field diagnostics")\
\
experimental(bool, UnlockExperimentalVMOptions, false, \
- "Enable normal processing of flags relating to experimental features")\
+ "Enable normal processing of flags relating to experimental " \
+ "features") \
\
product(bool, JavaMonitorsInStackTrace, true, \
- "Print info. about Java monitor locks when the stacks are dumped")\
+ "Print information about Java monitor locks when the stacks are" \
+ "dumped") \
\
product_pd(bool, UseLargePages, \
"Use large page memory") \
@@ -514,8 +557,12 @@
develop(bool, LargePagesIndividualAllocationInjectError, false, \
"Fail large pages individual allocation") \
\
+ product(bool, UseLargePagesInMetaspace, false, \
+ "Use large page memory in metaspace. " \
+ "Only used if UseLargePages is enabled.") \
+ \
develop(bool, TracePageSizes, false, \
- "Trace page size selection and usage.") \
+ "Trace page size selection and usage") \
\
product(bool, UseNUMA, false, \
"Use NUMA if available") \
@@ -530,12 +577,12 @@
"Force NUMA optimizations on single-node/UMA systems") \
\
product(uintx, NUMAChunkResizeWeight, 20, \
- "Percentage (0-100) used to weigh the current sample when " \
+ "Percentage (0-100) used to weigh the current sample when " \
"computing exponentially decaying average for " \
"AdaptiveNUMAChunkSizing") \
\
product(uintx, NUMASpaceResizeRate, 1*G, \
- "Do not reallocate more that this amount per collection") \
+ "Do not reallocate more than this amount per collection") \
\
product(bool, UseAdaptiveNUMAChunkSizing, true, \
"Enable adaptive chunk sizing for NUMA") \
@@ -552,17 +599,17 @@
product(intx, UseSSE, 99, \
"Highest supported SSE instructions set on x86/x64") \
\
- product(bool, UseAES, false, \
+ product(bool, UseAES, false, \
"Control whether AES instructions can be used on x86/x64") \
\
product(uintx, LargePageSizeInBytes, 0, \
- "Large page size (0 to let VM choose the page size") \
+ "Large page size (0 to let VM choose the page size)") \
\
product(uintx, LargePageHeapSizeThreshold, 128*M, \
- "Use large pages if max heap is at least this big") \
+ "Use large pages if maximum heap is at least this big") \
\
product(bool, ForceTimeHighResolution, false, \
- "Using high time resolution(For Win32 only)") \
+ "Using high time resolution (for Win32 only)") \
\
develop(bool, TraceItables, false, \
"Trace initialization and use of itables") \
@@ -578,10 +625,10 @@
\
develop(bool, TraceLongCompiles, false, \
"Print out every time compilation is longer than " \
- "a given threashold") \
+ "a given threshold") \
\
develop(bool, SafepointALot, false, \
- "Generates a lot of safepoints. Works with " \
+ "Generate a lot of safepoints. This works with " \
"GuaranteedSafepointInterval") \
\
product_pd(bool, BackgroundCompilation, \
@@ -589,13 +636,13 @@
"compilation") \
\
product(bool, PrintVMQWaitTime, false, \
- "Prints out the waiting time in VM operation queue") \
+ "Print out the waiting time in VM operation queue") \
\
develop(bool, NoYieldsInMicrolock, false, \
"Disable yields in microlock") \
\
develop(bool, TraceOopMapGeneration, false, \
- "Shows oopmap generation") \
+ "Show OopMapGeneration") \
\
product(bool, MethodFlushing, true, \
"Reclamation of zombie and not-entrant methods") \
@@ -604,10 +651,11 @@
"Verify stack of each thread when it is entering a runtime call") \
\
diagnostic(bool, ForceUnreachable, false, \
- "Make all non code cache addresses to be unreachable with forcing use of 64bit literal fixups") \
+ "Make all non code cache addresses to be unreachable by " \
+ "forcing use of 64bit literal fixups") \
\
notproduct(bool, StressDerivedPointers, false, \
- "Force scavenge when a derived pointers is detected on stack " \
+ "Force scavenge when a derived pointer is detected on stack " \
"after rtm call") \
\
develop(bool, TraceDerivedPointers, false, \
@@ -626,86 +674,86 @@
"Use Inline Caches for virtual calls ") \
\
develop(bool, InlineArrayCopy, true, \
- "inline arraycopy native that is known to be part of " \
+ "Inline arraycopy native that is known to be part of " \
"base library DLL") \
\
develop(bool, InlineObjectHash, true, \
- "inline Object::hashCode() native that is known to be part " \
+ "Inline Object::hashCode() native that is known to be part " \
"of base library DLL") \
\
develop(bool, InlineNatives, true, \
- "inline natives that are known to be part of base library DLL") \
+ "Inline natives that are known to be part of base library DLL") \
\
develop(bool, InlineMathNatives, true, \
- "inline SinD, CosD, etc.") \
+ "Inline SinD, CosD, etc.") \
\
develop(bool, InlineClassNatives, true, \
- "inline Class.isInstance, etc") \
+ "Inline Class.isInstance, etc") \
\
develop(bool, InlineThreadNatives, true, \
- "inline Thread.currentThread, etc") \
+ "Inline Thread.currentThread, etc") \
\
develop(bool, InlineUnsafeOps, true, \
- "inline memory ops (native methods) from sun.misc.Unsafe") \
+ "Inline memory ops (native methods) from sun.misc.Unsafe") \
\
product(bool, CriticalJNINatives, true, \
- "check for critical JNI entry points") \
+ "Check for critical JNI entry points") \
\
notproduct(bool, StressCriticalJNINatives, false, \
- "Exercise register saving code in critical natives") \
+ "Exercise register saving code in critical natives") \
\
product(bool, UseSSE42Intrinsics, false, \
"SSE4.2 versions of intrinsics") \
\
product(bool, UseAESIntrinsics, false, \
- "use intrinsics for AES versions of crypto") \
+ "Use intrinsics for AES versions of crypto") \
\
product(bool, UseCRC32Intrinsics, false, \
"use intrinsics for java.util.zip.CRC32") \
\
develop(bool, TraceCallFixup, false, \
- "traces all call fixups") \
+ "Trace all call fixups") \
\
develop(bool, DeoptimizeALot, false, \
- "deoptimize at every exit from the runtime system") \
+ "Deoptimize at every exit from the runtime system") \
\
notproduct(ccstrlist, DeoptimizeOnlyAt, "", \
- "a comma separated list of bcis to deoptimize at") \
+ "A comma separated list of bcis to deoptimize at") \
\
product(bool, DeoptimizeRandom, false, \
- "deoptimize random frames on random exit from the runtime system")\
+ "Deoptimize random frames on random exit from the runtime system")\
\
notproduct(bool, ZombieALot, false, \
- "creates zombies (non-entrant) at exit from the runt. system") \
+ "Create zombies (non-entrant) at exit from the runtime system") \
\
product(bool, UnlinkSymbolsALot, false, \
- "unlink unreferenced symbols from the symbol table at safepoints")\
+ "Unlink unreferenced symbols from the symbol table at safepoints")\
\
notproduct(bool, WalkStackALot, false, \
- "trace stack (no print) at every exit from the runtime system") \
+ "Trace stack (no print) at every exit from the runtime system") \
\
product(bool, Debugging, false, \
- "set when executing debug methods in debug.ccp " \
+ "Set when executing debug methods in debug.cpp " \
"(to prevent triggering assertions)") \
\
notproduct(bool, StrictSafepointChecks, trueInDebug, \
"Enable strict checks that safepoints cannot happen for threads " \
- "that used No_Safepoint_Verifier") \
+ "that use No_Safepoint_Verifier") \
\
notproduct(bool, VerifyLastFrame, false, \
"Verify oops on last frame on entry to VM") \
\
develop(bool, TraceHandleAllocation, false, \
- "Prints out warnings when suspicious many handles are allocated") \
+ "Print out warnings when suspiciously many handles are allocated")\
\
product(bool, UseCompilerSafepoints, true, \
"Stop at safepoints in compiled code") \
\
product(bool, FailOverToOldVerifier, true, \
- "fail over to old verifier when split verifier fails") \
+ "Fail over to old verifier when split verifier fails") \
\
develop(bool, ShowSafepointMsgs, false, \
- "Show msg. about safepoint synch.") \
+ "Show message about safepoint synchronization") \
\
product(bool, SafepointTimeout, false, \
"Time out and warn or fail after SafepointTimeoutDelay " \
@@ -729,19 +777,19 @@
"Trace external suspend wait failures") \
\
product(bool, MaxFDLimit, true, \
- "Bump the number of file descriptors to max in solaris.") \
+ "Bump the number of file descriptors to maximum in Solaris") \
\
diagnostic(bool, LogEvents, true, \
- "Enable the various ring buffer event logs") \
+ "Enable the various ring buffer event logs") \
\
diagnostic(uintx, LogEventsBufferEntries, 10, \
- "Enable the various ring buffer event logs") \
+ "Number of ring buffer event logs") \
\
product(bool, BytecodeVerificationRemote, true, \
- "Enables the Java bytecode verifier for remote classes") \
+ "Enable the Java bytecode verifier for remote classes") \
\
product(bool, BytecodeVerificationLocal, false, \
- "Enables the Java bytecode verifier for local classes") \
+ "Enable the Java bytecode verifier for local classes") \
\
develop(bool, ForceFloatExceptions, trueInDebug, \
"Force exceptions on FP stack under/overflow") \
@@ -753,7 +801,7 @@
"Trace java language assertions") \
\
notproduct(bool, CheckAssertionStatusDirectives, false, \
- "temporary - see javaClasses.cpp") \
+ "Temporary - see javaClasses.cpp") \
\
notproduct(bool, PrintMallocFree, false, \
"Trace calls to C heap malloc/free allocation") \
@@ -772,16 +820,16 @@
"entering the VM") \
\
notproduct(bool, CheckOopishValues, false, \
- "Warn if value contains oop ( requires ZapDeadLocals)") \
+ "Warn if value contains oop (requires ZapDeadLocals)") \
\
develop(bool, UseMallocOnly, false, \
- "use only malloc/free for allocation (no resource area/arena)") \
+ "Use only malloc/free for allocation (no resource area/arena)") \
\
develop(bool, PrintMalloc, false, \
- "print all malloc/free calls") \
+ "Print all malloc/free calls") \
\
develop(bool, PrintMallocStatistics, false, \
- "print malloc/free statistics") \
+ "Print malloc/free statistics") \
\
develop(bool, ZapResourceArea, trueInDebug, \
"Zap freed resource/arena space with 0xABABABAB") \
@@ -793,7 +841,7 @@
"Zap freed JNI handle space with 0xFEFEFEFE") \
\
notproduct(bool, ZapStackSegments, trueInDebug, \
- "Zap allocated/freed Stack segments with 0xFADFADED") \
+ "Zap allocated/freed stack segments with 0xFADFADED") \
\
develop(bool, ZapUnusedHeapArea, trueInDebug, \
"Zap unused heap space with 0xBAADBABE") \
@@ -808,7 +856,7 @@
"Zap filler objects with 0xDEAFBABE") \
\
develop(bool, PrintVMMessages, true, \
- "Print vm messages on console") \
+ "Print VM messages on console") \
\
product(bool, PrintGCApplicationConcurrentTime, false, \
"Print the time the application has been running") \
@@ -817,21 +865,21 @@
"Print the time the application has been stopped") \
\
diagnostic(bool, VerboseVerification, false, \
- "Display detailed verification details") \
+ "Display detailed verification details") \
\
notproduct(uintx, ErrorHandlerTest, 0, \
- "If > 0, provokes an error after VM initialization; the value" \
- "determines which error to provoke. See test_error_handler()" \
+ "If > 0, provokes an error after VM initialization; the value " \
+ "determines which error to provoke. See test_error_handler() " \
"in debug.cpp.") \
\
develop(bool, Verbose, false, \
- "Prints additional debugging information from other modes") \
+ "Print additional debugging information from other modes") \
\
develop(bool, PrintMiscellaneous, false, \
- "Prints uncategorized debugging information (requires +Verbose)") \
+ "Print uncategorized debugging information (requires +Verbose)") \
\
develop(bool, WizardMode, false, \
- "Prints much more debugging information") \
+ "Print much more debugging information") \
\
product(bool, ShowMessageBoxOnError, false, \
"Keep process alive on VM fatal error") \
@@ -843,7 +891,7 @@
"Let VM fatal error propagate to the OS (ie. WER on Windows)") \
\
product(bool, SuppressFatalErrorMessage, false, \
- "Do NO Fatal Error report [Avoid deadlock]") \
+ "Report NO fatal error message (avoid deadlock)") \
\
product(ccstrlist, OnError, "", \
"Run user-defined commands on fatal error; see VMError.cpp " \
@@ -853,17 +901,17 @@
"Run user-defined commands on first java.lang.OutOfMemoryError") \
\
manageable(bool, HeapDumpBeforeFullGC, false, \
- "Dump heap to file before any major stop-world GC") \
+ "Dump heap to file before any major stop-the-world GC") \
\
manageable(bool, HeapDumpAfterFullGC, false, \
- "Dump heap to file after any major stop-world GC") \
+ "Dump heap to file after any major stop-the-world GC") \
\
manageable(bool, HeapDumpOnOutOfMemoryError, false, \
"Dump heap to file when java.lang.OutOfMemoryError is thrown") \
\
manageable(ccstr, HeapDumpPath, NULL, \
- "When HeapDumpOnOutOfMemoryError is on, the path (filename or" \
- "directory) of the dump file (defaults to java_pid<pid>.hprof" \
+ "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \
+ "directory) of the dump file (defaults to java_pid<pid>.hprof " \
"in the working directory)") \
\
develop(uintx, SegmentedHeapDumpThreshold, 2*G, \
@@ -877,10 +925,10 @@
"Execute breakpoint upon encountering VM warning") \
\
develop(bool, TraceVMOperation, false, \
- "Trace vm operations") \
+ "Trace VM operations") \
\
develop(bool, UseFakeTimers, false, \
- "Tells whether the VM should use system time or a fake timer") \
+ "Tell whether the VM should use system time or a fake timer") \
\
product(ccstr, NativeMemoryTracking, "off", \
"Native memory tracking options") \
@@ -890,22 +938,22 @@
\
diagnostic(bool, AutoShutdownNMT, true, \
"Automatically shutdown native memory tracking under stress " \
- "situation. When set to false, native memory tracking tries to " \
+ "situations. When set to false, native memory tracking tries to " \
"stay alive at the expense of JVM performance") \
\
diagnostic(bool, LogCompilation, false, \
- "Log compilation activity in detail to hotspot.log or LogFile") \
+ "Log compilation activity in detail to LogFile") \
\
product(bool, PrintCompilation, false, \
"Print compilations") \
\
diagnostic(bool, TraceNMethodInstalls, false, \
- "Trace nmethod intallation") \
+ "Trace nmethod installation") \
\
diagnostic(intx, ScavengeRootsInCode, 2, \
- "0: do not allow scavengable oops in the code cache; " \
- "1: allow scavenging from the code cache; " \
- "2: emit as many constants as the compiler can see") \
+ "0: do not allow scavengable oops in the code cache; " \
+ "1: allow scavenging from the code cache; " \
+ "2: emit as many constants as the compiler can see") \
\
product(bool, AlwaysRestoreFPU, false, \
"Restore the FPU control word after every JNI call (expensive)") \
@@ -926,7 +974,7 @@
"Print assembly code (using external disassembler.so)") \
\
diagnostic(ccstr, PrintAssemblyOptions, NULL, \
- "Options string passed to disassembler.so") \
+ "Print options string passed to disassembler.so") \
\
diagnostic(bool, PrintNMethods, false, \
"Print assembly code for nmethods when generated") \
@@ -947,20 +995,21 @@
"Print exception handler tables for all nmethods when generated") \
\
develop(bool, StressCompiledExceptionHandlers, false, \
- "Exercise compiled exception handlers") \
+ "Exercise compiled exception handlers") \
\
develop(bool, InterceptOSException, false, \
- "Starts debugger when an implicit OS (e.g., NULL) " \
+ "Start debugger when an implicit OS (e.g. NULL) " \
"exception happens") \
\
product(bool, PrintCodeCache, false, \
"Print the code cache memory usage when exiting") \
\
develop(bool, PrintCodeCache2, false, \
- "Print detailed usage info on the code cache when exiting") \
+ "Print detailed usage information on the code cache when exiting")\
\
product(bool, PrintCodeCacheOnCompilation, false, \
- "Print the code cache memory usage each time a method is compiled") \
+ "Print the code cache memory usage each time a method is " \
+ "compiled") \
\
diagnostic(bool, PrintStubCode, false, \
"Print generated stub code") \
@@ -972,40 +1021,40 @@
"Omit backtraces for some 'hot' exceptions in optimized code") \
\
product(bool, ProfilerPrintByteCodeStatistics, false, \
- "Prints byte code statictics when dumping profiler output") \
+ "Print bytecode statistics when dumping profiler output") \
\
product(bool, ProfilerRecordPC, false, \
- "Collects tick for each 16 byte interval of compiled code") \
+ "Collect ticks for each 16 byte interval of compiled code") \
\
product(bool, ProfileVM, false, \
- "Profiles ticks that fall within VM (either in the VM Thread " \
+ "Profile ticks that fall within VM (either in the VM Thread " \
"or VM code called through stubs)") \
\
product(bool, ProfileIntervals, false, \
- "Prints profiles for each interval (see ProfileIntervalsTicks)") \
+ "Print profiles for each interval (see ProfileIntervalsTicks)") \
\
notproduct(bool, ProfilerCheckIntervals, false, \
- "Collect and print info on spacing of profiler ticks") \
+ "Collect and print information on spacing of profiler ticks") \
\
develop(bool, PrintJVMWarnings, false, \
- "Prints warnings for unimplemented JVM functions") \
+ "Print warnings for unimplemented JVM functions") \
\
product(bool, PrintWarnings, true, \
- "Prints JVM warnings to output stream") \
+ "Print JVM warnings to output stream") \
\
notproduct(uintx, WarnOnStalledSpinLock, 0, \
- "Prints warnings for stalled SpinLocks") \
+ "Print warnings for stalled SpinLocks") \
\
product(bool, RegisterFinalizersAtInit, true, \
"Register finalizable objects at end of Object.<init> or " \
"after allocation") \
\
develop(bool, RegisterReferences, true, \
- "Tells whether the VM should register soft/weak/final/phantom " \
+ "Tell whether the VM should register soft/weak/final/phantom " \
"references") \
\
develop(bool, IgnoreRewrites, false, \
- "Supress rewrites of bytecodes in the oopmap generator. " \
+ "Suppress rewrites of bytecodes in the oopmap generator. " \
"This is unsafe!") \
\
develop(bool, PrintCodeCacheExtension, false, \
@@ -1015,8 +1064,7 @@
"Enable the security JVM functions") \
\
develop(bool, ProtectionDomainVerification, true, \
- "Verifies protection domain before resolution in system " \
- "dictionary") \
+ "Verify protection domain before resolution in system dictionary")\
\
product(bool, ClassUnloading, true, \
"Do unloading of classes") \
@@ -1029,14 +1077,14 @@
"Write memory usage profiling to log file") \
\
notproduct(bool, PrintSystemDictionaryAtExit, false, \
- "Prints the system dictionary at exit") \
+ "Print the system dictionary at exit") \
\
experimental(intx, PredictedLoadedClassCount, 0, \
- "Experimental: Tune loaded class cache starting size.") \
+ "Experimental: Tune loaded class cache starting size") \
\
diagnostic(bool, UnsyncloadClass, false, \
"Unstable: VM calls loadClass unsynchronized. Custom " \
- "class loader must call VM synchronized for findClass " \
+ "class loader must call VM synchronized for findClass " \
"and defineClass.") \
\
product(bool, AlwaysLockClassLoader, false, \
@@ -1052,22 +1100,22 @@
"Call loadClassInternal() rather than loadClass()") \
\
product_pd(bool, DontYieldALot, \
- "Throw away obvious excess yield calls (for SOLARIS only)") \
+ "Throw away obvious excess yield calls (for Solaris only)") \
\
product_pd(bool, ConvertSleepToYield, \
- "Converts sleep(0) to thread yield " \
- "(may be off for SOLARIS to improve GUI)") \
+ "Convert sleep(0) to thread yield " \
+ "(may be off for Solaris to improve GUI)") \
\
product(bool, ConvertYieldToSleep, false, \
- "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
- "behavior (SOLARIS only)") \
+ "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \
+ "behavior (Solaris only)") \
\
product(bool, UseBoundThreads, true, \
- "Bind user level threads to kernel threads (for SOLARIS only)") \
+ "Bind user level threads to kernel threads (for Solaris only)") \
\
develop(bool, UseDetachedThreads, true, \
"Use detached threads that are recycled upon termination " \
- "(for SOLARIS only)") \
+ "(for Solaris only)") \
\
product(bool, UseLWPSynchronization, true, \
"Use LWP-based instead of libthread-based synchronization " \
@@ -1077,41 +1125,43 @@
"(Unstable) Various monitor synchronization tunables") \
\
product(intx, EmitSync, 0, \
- "(Unsafe,Unstable) " \
- " Controls emission of inline sync fast-path code") \
+ "(Unsafe, Unstable) " \
+ "Control emission of inline sync fast-path code") \
\
product(intx, MonitorBound, 0, "Bound Monitor population") \
\
product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \
\
- product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
- \
- product(intx, SyncVerbose, 0, "(Unstable)" ) \
- \
- product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" ) \
+ product(intx, SyncFlags, 0, "(Unsafe, Unstable) Experimental Sync flags") \
+ \
+ product(intx, SyncVerbose, 0, "(Unstable)") \
+ \
+ product(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \
\
product(intx, hashCode, 5, \
- "(Unstable) select hashCode generation algorithm" ) \
+ "(Unstable) select hashCode generation algorithm") \
\
product(intx, WorkAroundNPTLTimedWaitHang, 1, \
- "(Unstable, Linux-specific)" \
- " avoid NPTL-FUTEX hang pthread_cond_timedwait" ) \
+ "(Unstable, Linux-specific) " \
+ "avoid NPTL-FUTEX hang pthread_cond_timedwait") \
\
product(bool, FilterSpuriousWakeups, true, \
"Prevent spurious or premature wakeups from object.wait " \
"(Solaris only)") \
\
- product(intx, NativeMonitorTimeout, -1, "(Unstable)" ) \
- product(intx, NativeMonitorFlags, 0, "(Unstable)" ) \
- product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" ) \
+ product(intx, NativeMonitorTimeout, -1, "(Unstable)") \
+ \
+ product(intx, NativeMonitorFlags, 0, "(Unstable)") \
+ \
+ product(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \
\
develop(bool, UsePthreads, false, \
"Use pthread-based instead of libthread-based synchronization " \
"(SPARC only)") \
\
product(bool, AdjustConcurrency, false, \
- "call thr_setconcurrency at thread create time to avoid " \
- "LWP starvation on MP systems (For Solaris Only)") \
+ "Call thr_setconcurrency at thread creation time to avoid " \
+ "LWP starvation on MP systems (for Solaris Only)") \
\
product(bool, ReduceSignalUsage, false, \
"Reduce the use of OS signals in Java and/or the VM") \
@@ -1120,13 +1170,14 @@
"Share vtable stubs (smaller code but worse branch prediction") \
\
develop(bool, LoadLineNumberTables, true, \
- "Tells whether the class file parser loads line number tables") \
+ "Tell whether the class file parser loads line number tables") \
\
develop(bool, LoadLocalVariableTables, true, \
- "Tells whether the class file parser loads local variable tables")\
+ "Tell whether the class file parser loads local variable tables") \
\
develop(bool, LoadLocalVariableTypeTables, true, \
- "Tells whether the class file parser loads local variable type tables")\
+ "Tell whether the class file parser loads local variable type" \
+ "tables") \
\
product(bool, AllowUserSignalHandlers, false, \
"Do not complain if the application installs signal handlers " \
@@ -1157,10 +1208,12 @@
\
product(bool, EagerXrunInit, false, \
"Eagerly initialize -Xrun libraries; allows startup profiling, " \
- " but not all -Xrun libraries may support the state of the VM at this time") \
+ "but not all -Xrun libraries may support the state of the VM " \
+ "at this time") \
\
product(bool, PreserveAllAnnotations, false, \
- "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
+ "Preserve RuntimeInvisibleAnnotations as well " \
+ "as RuntimeVisibleAnnotations") \
\
develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \
"Number of OutOfMemoryErrors preallocated with backtrace") \
@@ -1235,7 +1288,7 @@
"Trace level for JVMTI RedefineClasses") \
\
develop(bool, StressMethodComparator, false, \
- "run the MethodComparator on all loaded methods") \
+ "Run the MethodComparator on all loaded methods") \
\
/* change to false by default sometime after Mustang */ \
product(bool, VerifyMergedCPBytecodes, true, \
@@ -1269,7 +1322,7 @@
"Trace dependencies") \
\
develop(bool, VerifyDependencies, trueInDebug, \
- "Exercise and verify the compilation dependency mechanism") \
+ "Exercise and verify the compilation dependency mechanism") \
\
develop(bool, TraceNewOopMapGeneration, false, \
"Trace OopMapGeneration") \
@@ -1287,7 +1340,7 @@
"Trace monitor matching failures during OopMapGeneration") \
\
develop(bool, TraceOopMapRewrites, false, \
- "Trace rewritting of method oops during oop map generation") \
+ "Trace rewriting of method oops during oop map generation") \
\
develop(bool, TraceSafepoint, false, \
"Trace safepoint operations") \
@@ -1305,10 +1358,10 @@
"Trace setup time") \
\
develop(bool, TraceProtectionDomainVerification, false, \
- "Trace protection domain verifcation") \
+ "Trace protection domain verification") \
\
develop(bool, TraceClearedExceptions, false, \
- "Prints when an exception is forcibly cleared") \
+ "Print when an exception is forcibly cleared") \
\
product(bool, TraceClassResolution, false, \
"Trace all constant pool resolutions (for debugging)") \
@@ -1322,7 +1375,7 @@
/* gc */ \
\
product(bool, UseSerialGC, false, \
- "Use the serial garbage collector") \
+ "Use the Serial garbage collector") \
\
product(bool, UseG1GC, false, \
"Use the Garbage-First garbage collector") \
@@ -1341,16 +1394,16 @@
"The collection count for the first maximum compaction") \
\
product(bool, UseMaximumCompactionOnSystemGC, true, \
- "In the Parallel Old garbage collector maximum compaction for " \
- "a system GC") \
+ "Use maximum compaction in the Parallel Old garbage collector " \
+ "for a system GC") \
\
product(uintx, ParallelOldDeadWoodLimiterMean, 50, \
- "The mean used by the par compact dead wood" \
- "limiter (a number between 0-100).") \
+ "The mean used by the parallel compact dead wood " \
+ "limiter (a number between 0-100)") \
\
product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \
- "The standard deviation used by the par compact dead wood" \
- "limiter (a number between 0-100).") \
+ "The standard deviation used by the parallel compact dead wood " \
+ "limiter (a number between 0-100)") \
\
product(uintx, ParallelGCThreads, 0, \
"Number of parallel threads parallel gc will use") \
@@ -1360,7 +1413,7 @@
"parallel gc will use") \
\
diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \
- "Force dynamic selection of the number of" \
+ "Force dynamic selection of the number of " \
"parallel threads parallel gc will use to aid debugging") \
\
product(uintx, HeapSizePerGCThread, ScaleForWordSize(64*M), \
@@ -1371,7 +1424,7 @@
"Trace the dynamic GC thread usage") \
\
develop(bool, ParallelOldGCSplitALot, false, \
- "Provoke splitting (copying data from a young gen space to" \
+ "Provoke splitting (copying data from a young gen space to " \
"multiple destination spaces)") \
\
develop(uintx, ParallelOldGCSplitInterval, 3, \
@@ -1381,19 +1434,19 @@
"Number of threads concurrent gc will use") \
\
product(uintx, YoungPLABSize, 4096, \
- "Size of young gen promotion labs (in HeapWords)") \
+ "Size of young gen promotion LAB's (in HeapWords)") \
\
product(uintx, OldPLABSize, 1024, \
- "Size of old gen promotion labs (in HeapWords)") \
+ "Size of old gen promotion LAB's (in HeapWords)") \
\
product(uintx, GCTaskTimeStampEntries, 200, \
"Number of time stamp entries per gc worker thread") \
\
product(bool, AlwaysTenure, false, \
- "Always tenure objects in eden. (ParallelGC only)") \
+ "Always tenure objects in eden (ParallelGC only)") \
\
product(bool, NeverTenure, false, \
- "Never tenure objects in eden, May tenure on overflow " \
+ "Never tenure objects in eden, may tenure on overflow " \
"(ParallelGC only)") \
\
product(bool, ScavengeBeforeFullGC, true, \
@@ -1401,14 +1454,14 @@
"used with UseParallelGC") \
\
develop(bool, ScavengeWithObjectsInToSpace, false, \
- "Allow scavenges to occur when to_space contains objects.") \
+ "Allow scavenges to occur when to-space contains objects") \
\
product(bool, UseConcMarkSweepGC, false, \
"Use Concurrent Mark-Sweep GC in the old generation") \
\
product(bool, ExplicitGCInvokesConcurrent, false, \
- "A System.gc() request invokes a concurrent collection;" \
- " (effective only when UseConcMarkSweepGC)") \
+ "A System.gc() request invokes a concurrent collection; " \
+ "(effective only when UseConcMarkSweepGC)") \
\
product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \
"A System.gc() request invokes a concurrent collection and " \
@@ -1416,19 +1469,19 @@
"(effective only when UseConcMarkSweepGC)") \
\
product(bool, GCLockerInvokesConcurrent, false, \
- "The exit of a JNI CS necessitating a scavenge also" \
- " kicks off a bkgrd concurrent collection") \
+ "The exit of a JNI critical section necessitating a scavenge, " \
+ "also kicks off a background concurrent collection") \
\
product(uintx, GCLockerEdenExpansionPercent, 5, \
- "How much the GC can expand the eden by while the GC locker " \
+ "How much the GC can expand the eden by while the GC locker " \
"is active (as a percentage)") \
\
diagnostic(intx, GCLockerRetryAllocationCount, 2, \
- "Number of times to retry allocations when" \
- " blocked by the GC locker") \
+ "Number of times to retry allocations when " \
+ "blocked by the GC locker") \
\
develop(bool, UseCMSAdaptiveFreeLists, true, \
- "Use Adaptive Free Lists in the CMS generation") \
+ "Use adaptive free lists in the CMS generation") \
\
develop(bool, UseAsyncConcMarkSweepGC, true, \
"Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
@@ -1443,44 +1496,46 @@
"Use passing of collection from background to foreground") \
\
product(bool, UseParNewGC, false, \
- "Use parallel threads in the new generation.") \
+ "Use parallel threads in the new generation") \
\
product(bool, ParallelGCVerbose, false, \
- "Verbose output for parallel GC.") \
+ "Verbose output for parallel gc") \
\
product(uintx, ParallelGCBufferWastePct, 10, \
- "Wasted fraction of parallel allocation buffer.") \
+ "Wasted fraction of parallel allocation buffer") \
\
diagnostic(bool, ParallelGCRetainPLAB, false, \
- "Retain parallel allocation buffers across scavenges; " \
- " -- disabled because this currently conflicts with " \
- " parallel card scanning under certain conditions ") \
+ "Retain parallel allocation buffers across scavenges; " \
+ "it is disabled because this currently conflicts with " \
+ "parallel card scanning under certain conditions.") \
\
product(uintx, TargetPLABWastePct, 10, \
"Target wasted space in last buffer as percent of overall " \
"allocation") \
\
product(uintx, PLABWeight, 75, \
- "Percentage (0-100) used to weight the current sample when" \
- "computing exponentially decaying average for ResizePLAB.") \
+ "Percentage (0-100) used to weigh the current sample when " \
+ "computing exponentially decaying average for ResizePLAB") \
\
product(bool, ResizePLAB, true, \
- "Dynamically resize (survivor space) promotion labs") \
+ "Dynamically resize (survivor space) promotion LAB's") \
\
product(bool, PrintPLAB, false, \
- "Print (survivor space) promotion labs sizing decisions") \
+ "Print (survivor space) promotion LAB's sizing decisions") \
\
product(intx, ParGCArrayScanChunk, 50, \
- "Scan a subset and push remainder, if array is bigger than this") \
+ "Scan a subset of object array and push remainder, if array is " \
+ "bigger than this") \
\
product(bool, ParGCUseLocalOverflow, false, \
"Instead of a global overflow list, use local overflow stacks") \
\
product(bool, ParGCTrimOverflow, true, \
- "Eagerly trim the local overflow lists (when ParGCUseLocalOverflow") \
+ "Eagerly trim the local overflow lists " \
+ "(when ParGCUseLocalOverflow)") \
\
notproduct(bool, ParGCWorkQueueOverflowALot, false, \
- "Whether we should simulate work queue overflow in ParNew") \
+ "Simulate work queue overflow in ParNew") \
\
notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \
"An `interval' counter that determines how frequently " \
@@ -1498,43 +1553,46 @@
"during card table scanning") \
\
product(uintx, CMSParPromoteBlocksToClaim, 16, \
- "Number of blocks to attempt to claim when refilling CMS LAB for "\
- "parallel GC.") \
+ "Number of blocks to attempt to claim when refilling CMS LAB's " \
+ "for parallel GC") \
\
product(uintx, OldPLABWeight, 50, \
- "Percentage (0-100) used to weight the current sample when" \
- "computing exponentially decaying average for resizing CMSParPromoteBlocksToClaim.") \
+ "Percentage (0-100) used to weight the current sample when " \
+ "computing exponentially decaying average for resizing " \
+ "CMSParPromoteBlocksToClaim") \
\
product(bool, ResizeOldPLAB, true, \
- "Dynamically resize (old gen) promotion labs") \
+ "Dynamically resize (old gen) promotion LAB's") \
\
product(bool, PrintOldPLAB, false, \
- "Print (old gen) promotion labs sizing decisions") \
+ "Print (old gen) promotion LAB's sizing decisions") \
\
product(uintx, CMSOldPLABMin, 16, \
- "Min size of CMS gen promotion lab caches per worker per blksize")\
+ "Minimum size of CMS gen promotion LAB caches per worker " \
+ "per block size") \
\
product(uintx, CMSOldPLABMax, 1024, \
- "Max size of CMS gen promotion lab caches per worker per blksize")\
+ "Maximum size of CMS gen promotion LAB caches per worker " \
+ "per block size") \
\
product(uintx, CMSOldPLABNumRefills, 4, \
- "Nominal number of refills of CMS gen promotion lab cache" \
- " per worker per block size") \
+ "Nominal number of refills of CMS gen promotion LAB cache " \
+ "per worker per block size") \
\
product(bool, CMSOldPLABResizeQuicker, false, \
- "Whether to react on-the-fly during a scavenge to a sudden" \
- " change in block demand rate") \
+ "React on-the-fly during a scavenge to a sudden " \
+ "change in block demand rate") \
\
product(uintx, CMSOldPLABToleranceFactor, 4, \
- "The tolerance of the phase-change detector for on-the-fly" \
- " PLAB resizing during a scavenge") \
+ "The tolerance of the phase-change detector for on-the-fly " \
+ "PLAB resizing during a scavenge") \
\
product(uintx, CMSOldPLABReactivityFactor, 2, \
- "The gain in the feedback loop for on-the-fly PLAB resizing" \
- " during a scavenge") \
+ "The gain in the feedback loop for on-the-fly PLAB resizing " \
+ "during a scavenge") \
\
product(bool, AlwaysPreTouch, false, \
- "It forces all freshly committed pages to be pre-touched.") \
+ "Force all freshly committed pages to be pre-touched") \
\
product_pd(uintx, CMSYoungGenPerWorker, \
"The maximum size of young gen chosen by default per GC worker " \
@@ -1544,64 +1602,67 @@
"Whether CMS GC should operate in \"incremental\" mode") \
\
product(uintx, CMSIncrementalDutyCycle, 10, \
- "CMS incremental mode duty cycle (a percentage, 0-100). If" \
- "CMSIncrementalPacing is enabled, then this is just the initial" \
- "value") \
+ "Percentage (0-100) of CMS incremental mode duty cycle. If " \
+ "CMSIncrementalPacing is enabled, then this is just the initial " \
+ "value.") \
\
product(bool, CMSIncrementalPacing, true, \
"Whether the CMS incremental mode duty cycle should be " \
"automatically adjusted") \
\
product(uintx, CMSIncrementalDutyCycleMin, 0, \
- "Lower bound on the duty cycle when CMSIncrementalPacing is " \
- "enabled (a percentage, 0-100)") \
+ "Minimum percentage (0-100) of the CMS incremental duty cycle " \
+ "used when CMSIncrementalPacing is enabled") \
\
product(uintx, CMSIncrementalSafetyFactor, 10, \
"Percentage (0-100) used to add conservatism when computing the " \
"duty cycle") \
\
product(uintx, CMSIncrementalOffset, 0, \
- "Percentage (0-100) by which the CMS incremental mode duty cycle" \
- " is shifted to the right within the period between young GCs") \
+ "Percentage (0-100) by which the CMS incremental mode duty cycle "\
+ "is shifted to the right within the period between young GCs") \
\
product(uintx, CMSExpAvgFactor, 50, \
- "Percentage (0-100) used to weight the current sample when" \
- "computing exponential averages for CMS statistics.") \
+ "Percentage (0-100) used to weigh the current sample when " \
+ "computing exponential averages for CMS statistics") \
\
product(uintx, CMS_FLSWeight, 75, \
- "Percentage (0-100) used to weight the current sample when" \
- "computing exponentially decating averages for CMS FLS statistics.") \
+ "Percentage (0-100) used to weigh the current sample when " \
+ "computing exponentially decaying averages for CMS FLS " \
+ "statistics") \
\
product(uintx, CMS_FLSPadding, 1, \
- "The multiple of deviation from mean to use for buffering" \
- "against volatility in free list demand.") \
+ "The multiple of deviation from mean to use for buffering " \
+ "against volatility in free list demand") \
\
product(uintx, FLSCoalescePolicy, 2, \
- "CMS: Aggression level for coalescing, increasing from 0 to 4") \
+ "CMS: aggressiveness level for coalescing, increasing " \
+ "from 0 to 4") \
\
product(bool, FLSAlwaysCoalesceLarge, false, \
- "CMS: Larger free blocks are always available for coalescing") \
+ "CMS: larger free blocks are always available for coalescing") \
\
product(double, FLSLargestBlockCoalesceProximity, 0.99, \
- "CMS: the smaller the percentage the greater the coalition force")\
+ "CMS: the smaller the percentage the greater the coalescing " \
+ "force") \
\
product(double, CMSSmallCoalSurplusPercent, 1.05, \
- "CMS: the factor by which to inflate estimated demand of small" \
- " block sizes to prevent coalescing with an adjoining block") \
+ "CMS: the factor by which to inflate estimated demand of small " \
+ "block sizes to prevent coalescing with an adjoining block") \
\
product(double, CMSLargeCoalSurplusPercent, 0.95, \
- "CMS: the factor by which to inflate estimated demand of large" \
- " block sizes to prevent coalescing with an adjoining block") \
+ "CMS: the factor by which to inflate estimated demand of large " \
+ "block sizes to prevent coalescing with an adjoining block") \
\
product(double, CMSSmallSplitSurplusPercent, 1.10, \
- "CMS: the factor by which to inflate estimated demand of small" \
- " block sizes to prevent splitting to supply demand for smaller" \
- " blocks") \
+ "CMS: the factor by which to inflate estimated demand of small " \
+ "block sizes to prevent splitting to supply demand for smaller " \
+ "blocks") \
\
product(double, CMSLargeSplitSurplusPercent, 1.00, \
- "CMS: the factor by which to inflate estimated demand of large" \
- " block sizes to prevent splitting to supply demand for smaller" \
- " blocks") \
+ "CMS: the factor by which to inflate estimated demand of large " \
+ "block sizes to prevent splitting to supply demand for smaller " \
+ "blocks") \
\
product(bool, CMSExtrapolateSweep, false, \
"CMS: cushion for block demand during sweep") \
@@ -1613,11 +1674,11 @@
\
product(uintx, CMS_SweepPadding, 1, \
"The multiple of deviation from mean to use for buffering " \
- "against volatility in inter-sweep duration.") \
+ "against volatility in inter-sweep duration") \
\
product(uintx, CMS_SweepTimerThresholdMillis, 10, \
"Skip block flux-rate sampling for an epoch unless inter-sweep " \
- "duration exceeds this threhold in milliseconds") \
+ "duration exceeds this threshold in milliseconds") \
\
develop(bool, CMSTraceIncrementalMode, false, \
"Trace CMS incremental mode") \
@@ -1632,14 +1693,15 @@
"Whether class unloading enabled when using CMS GC") \
\
product(uintx, CMSClassUnloadingMaxInterval, 0, \
- "When CMS class unloading is enabled, the maximum CMS cycle count"\
- " for which classes may not be unloaded") \
+ "When CMS class unloading is enabled, the maximum CMS cycle " \
+ "count for which classes may not be unloaded") \
\
product(bool, CMSCompactWhenClearAllSoftRefs, true, \
- "Compact when asked to collect CMS gen with clear_all_soft_refs") \
+ "Compact when asked to collect CMS gen with " \
+ "clear_all_soft_refs()") \
\
product(bool, UseCMSCompactAtFullCollection, true, \
- "Use mark sweep compact at full collections") \
+ "Use Mark-Sweep-Compact algorithm at full collections") \
\
product(uintx, CMSFullGCsBeforeCompaction, 0, \
"Number of CMS full collection done before compaction if > 0") \
@@ -1661,38 +1723,37 @@
"Warn in case of excessive CMS looping") \
\
develop(bool, CMSOverflowEarlyRestoration, false, \
- "Whether preserved marks should be restored early") \
+ "Restore preserved marks early") \
\
product(uintx, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \
"Size of marking stack") \
\
product(uintx, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \
- "Max size of marking stack") \
+ "Maximum size of marking stack") \
\
notproduct(bool, CMSMarkStackOverflowALot, false, \
- "Whether we should simulate frequent marking stack / work queue" \
- " overflow") \
+ "Simulate frequent marking stack / work queue overflow") \
\
notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \
- "An `interval' counter that determines how frequently" \
- " we simulate overflow; a smaller number increases frequency") \
+ "An \"interval\" counter that determines how frequently " \
+ "to simulate overflow; a smaller number increases frequency") \
\
product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
- "(Temporary, subject to experimentation)" \
+ "(Temporary, subject to experimentation) " \
"Maximum number of abortable preclean iterations, if > 0") \
\
product(intx, CMSMaxAbortablePrecleanTime, 5000, \
- "(Temporary, subject to experimentation)" \
- "Maximum time in abortable preclean in ms") \
+ "(Temporary, subject to experimentation) " \
+ "Maximum time in abortable preclean (in milliseconds)") \
\
product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
- "(Temporary, subject to experimentation)" \
+ "(Temporary, subject to experimentation) " \
"Nominal minimum work per abortable preclean iteration") \
\
manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
- "(Temporary, subject to experimentation)" \
- " Time that we sleep between iterations when not given" \
- " enough work per iteration") \
+ "(Temporary, subject to experimentation) " \
+ "Time that we sleep between iterations when not given " \
+ "enough work per iteration") \
\
product(uintx, CMSRescanMultiple, 32, \
"Size (in cards) of CMS parallel rescan task") \
@@ -1710,23 +1771,24 @@
"Whether parallel remark enabled (only if ParNewGC)") \
\
product(bool, CMSParallelSurvivorRemarkEnabled, true, \
- "Whether parallel remark of survivor space" \
- " enabled (effective only if CMSParallelRemarkEnabled)") \
+ "Whether parallel remark of survivor space " \
+ "enabled (effective only if CMSParallelRemarkEnabled)") \
\
product(bool, CMSPLABRecordAlways, true, \
- "Whether to always record survivor space PLAB bdries" \
- " (effective only if CMSParallelSurvivorRemarkEnabled)") \
+ "Always record survivor space PLAB boundaries (effective only " \
+ "if CMSParallelSurvivorRemarkEnabled)") \
\
product(bool, CMSEdenChunksRecordAlways, true, \
- "Whether to always record eden chunks used for " \
- "the parallel initial mark or remark of eden" ) \
+ "Always record eden chunks used for the parallel initial mark " \
+ "or remark of eden") \
\
product(bool, CMSPrintEdenSurvivorChunks, false, \
"Print the eden and the survivor chunks used for the parallel " \
"initial mark or remark of the eden/survivor spaces") \
\
product(bool, CMSConcurrentMTEnabled, true, \
- "Whether multi-threaded concurrent work enabled (if ParNewGC)") \
+ "Whether multi-threaded concurrent work enabled " \
+ "(effective only if ParNewGC)") \
\
product(bool, CMSPrecleaningEnabled, true, \
"Whether concurrent precleaning enabled") \
@@ -1735,12 +1797,12 @@
"Maximum number of precleaning iteration passes") \
\
product(uintx, CMSPrecleanNumerator, 2, \
- "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
- " ratio") \
+ "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
+ "ratio") \
\
product(uintx, CMSPrecleanDenominator, 3, \
- "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence" \
- " ratio") \
+ "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \
+ "ratio") \
\
product(bool, CMSPrecleanRefLists1, true, \
"Preclean ref lists during (initial) preclean phase") \
@@ -1755,7 +1817,7 @@
"Preclean survivors during abortable preclean phase") \
\
product(uintx, CMSPrecleanThreshold, 1000, \
- "Don't re-iterate if #dirty cards less than this") \
+ "Do not iterate again if number of dirty cards is less than this")\
\
product(bool, CMSCleanOnEnter, true, \
"Clean-on-enter optimization for reducing number of dirty cards") \
@@ -1764,14 +1826,16 @@
"Choose variant (1,2) of verification following remark") \
\
product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
- "If Eden used is below this value, don't try to schedule remark") \
+ "If Eden size is below this, do not try to schedule remark") \
\
product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
- "The Eden occupancy % at which to try and schedule remark pause") \
+ "The Eden occupancy percentage (0-100) at which " \
+ "to try and schedule remark pause") \
\
product(uintx, CMSScheduleRemarkSamplingRatio, 5, \
- "Start sampling Eden top at least before yg occupancy reaches" \
- " 1/<ratio> of the size at which we plan to schedule remark") \
+ "Start sampling eden top at least before young gen " \
+ "occupancy reaches 1/<ratio> of the size at which " \
+ "we plan to schedule remark") \
\
product(uintx, CMSSamplingGrain, 16*K, \
"The minimum distance between eden samples for CMS (see above)") \
@@ -1793,27 +1857,27 @@
"should start a collection cycle") \
\
product(bool, CMSYield, true, \
- "Yield between steps of concurrent mark & sweep") \
+ "Yield between steps of CMS") \
\
product(uintx, CMSBitMapYieldQuantum, 10*M, \
- "Bitmap operations should process at most this many bits" \
+ "Bitmap operations should process at most this many bits " \
"between yields") \
\
product(bool, CMSDumpAtPromotionFailure, false, \
"Dump useful information about the state of the CMS old " \
- " generation upon a promotion failure.") \
+ "generation upon a promotion failure") \
\
product(bool, CMSPrintChunksInDump, false, \
"In a dump enabled by CMSDumpAtPromotionFailure, include " \
- " more detailed information about the free chunks.") \
+ "more detailed information about the free chunks") \
\
product(bool, CMSPrintObjectsInDump, false, \
"In a dump enabled by CMSDumpAtPromotionFailure, include " \
- " more detailed information about the allocated objects.") \
+ "more detailed information about the allocated objects") \
\
diagnostic(bool, FLSVerifyAllHeapReferences, false, \
- "Verify that all refs across the FLS boundary " \
- " are to valid objects") \
+ "Verify that all references across the FLS boundary " \
+ "are to valid objects") \
\
diagnostic(bool, FLSVerifyLists, false, \
"Do lots of (expensive) FreeListSpace verification") \
@@ -1825,17 +1889,18 @@
"Do lots of (expensive) FLS dictionary verification") \
\
develop(bool, VerifyBlockOffsetArray, false, \
- "Do (expensive!) block offset array verification") \
+ "Do (expensive) block offset array verification") \
\
diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \
- "Maintain _unallocated_block in BlockOffsetArray" \
- " (currently applicable only to CMS collector)") \
+ "Maintain _unallocated_block in BlockOffsetArray " \
+ "(currently applicable only to CMS collector)") \
\
develop(bool, TraceCMSState, false, \
"Trace the state of the CMS collection") \
\
product(intx, RefDiscoveryPolicy, 0, \
- "Whether reference-based(0) or referent-based(1)") \
+ "Select type of reference discovery policy: " \
+ "reference-based(0) or referent-based(1)") \
\
product(bool, ParallelRefProcEnabled, false, \
"Enable parallel reference processing whenever possible") \
@@ -1863,7 +1928,7 @@
"denotes 'do constant GC cycles'.") \
\
product(bool, UseCMSInitiatingOccupancyOnly, false, \
- "Only use occupancy as a crierion for starting a CMS collection") \
+ "Only use occupancy as a criterion for starting a CMS collection")\
\
product(uintx, CMSIsTooFullPercentage, 98, \
"An absolute ceiling above which CMS will always consider the " \
@@ -1875,7 +1940,7 @@
\
notproduct(bool, CMSVerifyReturnedBytes, false, \
"Check that all the garbage collected was returned to the " \
- "free lists.") \
+ "free lists") \
\
notproduct(bool, ScavengeALot, false, \
"Force scavenge at every Nth exit from the runtime system " \
@@ -1890,16 +1955,16 @@
\
product(bool, PrintPromotionFailure, false, \
"Print additional diagnostic information following " \
- " promotion failure") \
+ "promotion failure") \
\
notproduct(bool, PromotionFailureALot, false, \
"Use promotion failure handling on every youngest generation " \
"collection") \
\
develop(uintx, PromotionFailureALotCount, 1000, \
- "Number of promotion failures occurring at ParGCAllocBuffer" \
+ "Number of promotion failures occurring at ParGCAllocBuffer " \
"refill attempts (ParNew) or promotion attempts " \
- "(other young collectors) ") \
+ "(other young collectors)") \
\
develop(uintx, PromotionFailureALotInterval, 5, \
"Total collections between promotion failures alot") \
@@ -1918,7 +1983,7 @@
"Ratio of hard spins to calls to yield") \
\
develop(uintx, ObjArrayMarkingStride, 512, \
- "Number of ObjArray elements to push onto the marking stack" \
+ "Number of object array elements to push onto the marking stack " \
"before pushing a continuation entry") \
\
develop(bool, MetadataAllocationFailALot, false, \
@@ -1926,14 +1991,7 @@
"MetadataAllocationFailALotInterval") \
\
develop(uintx, MetadataAllocationFailALotInterval, 1000, \
- "metadata allocation failure alot interval") \
- \
- develop(bool, MetaDataDeallocateALot, false, \
- "Deallocation bunches of metadata at intervals controlled by " \
- "MetaDataAllocateALotInterval") \
- \
- develop(uintx, MetaDataDeallocateALotInterval, 100, \
- "Metadata deallocation alot interval") \
+ "Metadata allocation failure a lot interval") \
\
develop(bool, TraceMetadataChunkAllocation, false, \
"Trace chunk metadata allocations") \
@@ -1945,7 +2003,7 @@
"Trace virtual space metadata allocations") \
\
notproduct(bool, ExecuteInternalVMTests, false, \
- "Enable execution of internal VM tests.") \
+ "Enable execution of internal VM tests") \
\
notproduct(bool, VerboseInternalVMTests, false, \
"Turn on logging for internal VM tests.") \
@@ -1953,7 +2011,7 @@
product_pd(bool, UseTLAB, "Use thread-local object allocation") \
\
product_pd(bool, ResizeTLAB, \
- "Dynamically resize tlab size for threads") \
+ "Dynamically resize TLAB size for threads") \
\
product(bool, ZeroTLAB, false, \
"Zero out the newly created TLAB") \
@@ -1965,7 +2023,8 @@
"Print various TLAB related information") \
\
product(bool, TLABStats, true, \
- "Print various TLAB related information") \
+ "Provide more detailed and expensive TLAB statistics " \
+ "(with PrintTLAB)") \
\
EMBEDDED_ONLY(product(bool, LowMemoryProtection, true, \
"Enable LowMemoryProtection")) \
@@ -1999,14 +2058,14 @@
"Fraction (1/n) of real memory used for initial heap size") \
\
develop(uintx, MaxVirtMemFraction, 2, \
- "Maximum fraction (1/n) of virtual memory used for ergonomically" \
+ "Maximum fraction (1/n) of virtual memory used for ergonomically "\
"determining maximum heap size") \
\
product(bool, UseAutoGCSelectPolicy, false, \
"Use automatic collection selection policy") \
\
product(uintx, AutoGCSelectPauseMillis, 5000, \
- "Automatic GC selection pause threshhold in ms") \
+ "Automatic GC selection pause threshold in milliseconds") \
\
product(bool, UseAdaptiveSizePolicy, true, \
"Use adaptive generation sizing policies") \
@@ -2021,7 +2080,7 @@
"Use adaptive young-old sizing policies at major collections") \
\
product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \
- "Use statistics from System.GC for adaptive size policy") \
+ "Include statistics from System.gc() for adaptive size policy") \
\
product(bool, UseAdaptiveGCBoundary, false, \
"Allow young-old boundary to move") \
@@ -2033,16 +2092,16 @@
"Resize the virtual spaces of the young or old generations") \
\
product(uintx, AdaptiveSizeThroughPutPolicy, 0, \
- "Policy for changeing generation size for throughput goals") \
+ "Policy for changing generation size for throughput goals") \
\
product(uintx, AdaptiveSizePausePolicy, 0, \
"Policy for changing generation size for pause goals") \
\
develop(bool, PSAdjustTenuredGenForMinorPause, false, \
- "Adjust tenured generation to achive a minor pause goal") \
+ "Adjust tenured generation to achieve a minor pause goal") \
\
develop(bool, PSAdjustYoungGenForMajorPause, false, \
- "Adjust young generation to achive a major pause goal") \
+ "Adjust young generation to achieve a major pause goal") \
\
product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
"Number of steps where heuristics is used before data is used") \
@@ -2097,14 +2156,15 @@
"Decay factor to TenuredGenerationSizeIncrement") \
\
product(uintx, MaxGCPauseMillis, max_uintx, \
- "Adaptive size policy maximum GC pause time goal in msec, " \
- "or (G1 Only) the max. GC time per MMU time slice") \
+ "Adaptive size policy maximum GC pause time goal in millisecond, "\
+ "or (G1 Only) the maximum GC time per MMU time slice") \
\
product(uintx, GCPauseIntervalMillis, 0, \
"Time slice for MMU specification") \
\
product(uintx, MaxGCMinorPauseMillis, max_uintx, \
- "Adaptive size policy maximum GC minor pause time goal in msec") \
+ "Adaptive size policy maximum GC minor pause time goal " \
+ "in millisecond") \
\
product(uintx, GCTimeRatio, 99, \
"Adaptive size policy application time to GC time ratio") \
@@ -2122,7 +2182,7 @@
"Minimum ratio of young generation/survivor space size") \
\
product(uintx, InitialSurvivorRatio, 8, \
- "Initial ratio of eden/survivor space size") \
+ "Initial ratio of young generation/survivor space size") \
\
product(uintx, BaseFootPrintEstimate, 256*M, \
"Estimate of footprint other than Java Heap") \
@@ -2132,8 +2192,8 @@
"before an OutOfMemory error is thrown") \
\
product(uintx, GCTimeLimit, 98, \
- "Limit of proportion of time spent in GC before an OutOfMemory" \
- "error is thrown (used with GCHeapFreeLimit)") \
+ "Limit of the proportion of time spent in GC before " \
+ "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \
\
product(uintx, GCHeapFreeLimit, 2, \
"Minimum percentage of free space after a full GC before an " \
@@ -2155,7 +2215,7 @@
"How many fields ahead to prefetch in oop scan (<= 0 means off)") \
\
diagnostic(bool, VerifySilently, false, \
- "Don't print print the verification progress") \
+ "Do not print the verification progress") \
\
diagnostic(bool, VerifyDuringStartup, false, \
"Verify memory system before executing any Java code " \
@@ -2178,7 +2238,7 @@
\
diagnostic(bool, DeferInitialCardMark, false, \
"When +ReduceInitialCardMarks, explicitly defer any that " \
- "may arise from new_pre_store_barrier") \
+ "may arise from new_pre_store_barrier") \
\
diagnostic(bool, VerifyRememberedSets, false, \
"Verify GC remembered sets") \
@@ -2187,10 +2247,10 @@
"Verify GC object start array if verify before/after") \
\
product(bool, DisableExplicitGC, false, \
- "Tells whether calling System.gc() does a full GC") \
+ "Ignore calls to System.gc()") \
\
notproduct(bool, CheckMemoryInitialization, false, \
- "Checks memory initialization") \
+ "Check memory initialization") \
\
product(bool, CollectGen0First, false, \
"Collect youngest generation before each full GC") \
@@ -2211,44 +2271,45 @@
"Stride through processors when distributing processes") \
\
product(uintx, CMSCoordinatorYieldSleepCount, 10, \
- "number of times the coordinator GC thread will sleep while " \
+ "Number of times the coordinator GC thread will sleep while " \
"yielding before giving up and resuming GC") \
\
product(uintx, CMSYieldSleepCount, 0, \
- "number of times a GC thread (minus the coordinator) " \
+ "Number of times a GC thread (minus the coordinator) " \
"will sleep while yielding before giving up and resuming GC") \
\
/* gc tracing */ \
manageable(bool, PrintGC, false, \
- "Print message at garbage collect") \
+ "Print message at garbage collection") \
\
manageable(bool, PrintGCDetails, false, \
- "Print more details at garbage collect") \
+ "Print more details at garbage collection") \
\
manageable(bool, PrintGCDateStamps, false, \
- "Print date stamps at garbage collect") \
+ "Print date stamps at garbage collection") \
\
manageable(bool, PrintGCTimeStamps, false, \
- "Print timestamps at garbage collect") \
+ "Print timestamps at garbage collection") \
\
product(bool, PrintGCTaskTimeStamps, false, \
"Print timestamps for individual gc worker thread tasks") \
\
develop(intx, ConcGCYieldTimeout, 0, \
- "If non-zero, assert that GC threads yield within this # of ms.") \
+ "If non-zero, assert that GC threads yield within this " \
+ "number of milliseconds") \
\
notproduct(bool, TraceMarkSweep, false, \
"Trace mark sweep") \
\
product(bool, PrintReferenceGC, false, \
"Print times spent handling reference objects during GC " \
- " (enabled only when PrintGCDetails)") \
+ "(enabled only when PrintGCDetails)") \
\
develop(bool, TraceReferenceGC, false, \
"Trace handling of soft/weak/final/phantom references") \
\
develop(bool, TraceFinalizerRegistration, false, \
- "Trace registration of final references") \
+ "Trace registration of final references") \
\
notproduct(bool, TraceScavenge, false, \
"Trace scavenge") \
@@ -2285,7 +2346,7 @@
"Print heap layout before and after each GC") \
\
product_rw(bool, PrintHeapAtGCExtended, false, \
- "Prints extended information about the layout of the heap " \
+ "Print extended information about the layout of the heap " \
"when -XX:+PrintHeapAtGC is set") \
\
product(bool, PrintHeapAtSIGBREAK, true, \
@@ -2322,45 +2383,45 @@
"Trace actions of the GC task threads") \
\
product(bool, PrintParallelOldGCPhaseTimes, false, \
- "Print the time taken by each parallel old gc phase." \
- "PrintGCDetails must also be enabled.") \
+ "Print the time taken by each phase in ParallelOldGC " \
+ "(PrintGCDetails must also be enabled)") \
\
develop(bool, TraceParallelOldGCMarkingPhase, false, \
- "Trace parallel old gc marking phase") \
+ "Trace marking phase in ParallelOldGC") \
\
develop(bool, TraceParallelOldGCSummaryPhase, false, \
- "Trace parallel old gc summary phase") \
+ "Trace summary phase in ParallelOldGC") \
\
develop(bool, TraceParallelOldGCCompactionPhase, false, \
- "Trace parallel old gc compaction phase") \
+ "Trace compaction phase in ParallelOldGC") \
\
develop(bool, TraceParallelOldGCDensePrefix, false, \
- "Trace parallel old gc dense prefix computation") \
+ "Trace dense prefix computation for ParallelOldGC") \
\
develop(bool, IgnoreLibthreadGPFault, false, \
"Suppress workaround for libthread GP fault") \
\
product(bool, PrintJNIGCStalls, false, \
- "Print diagnostic message when GC is stalled" \
+ "Print diagnostic message when GC is stalled " \
"by JNI critical section") \
\
experimental(double, ObjectCountCutOffPercent, 0.5, \
"The percentage of the used heap that the instances of a class " \
- "must occupy for the class to generate a trace event.") \
+ "must occupy for the class to generate a trace event") \
\
/* GC log rotation setting */ \
\
product(bool, UseGCLogFileRotation, false, \
- "Prevent large gclog file for long running app. " \
- "Requires -Xloggc:<filename>") \
+ "Rotate gclog files (for long running applications). It requires "\
+ "-Xloggc:<filename>") \
\
product(uintx, NumberOfGCLogFiles, 0, \
- "Number of gclog files in rotation, " \
- "Default: 0, no rotation") \
+ "Number of gclog files in rotation " \
+ "(default: 0, no rotation)") \
\
product(uintx, GCLogFileSize, 0, \
- "GC log file size, Default: 0 bytes, no rotation " \
- "Only valid with UseGCLogFileRotation") \
+ "GC log file size (default: 0 bytes, no rotation). " \
+ "It requires UseGCLogFileRotation") \
\
/* JVMTI heap profiling */ \
\
@@ -2437,40 +2498,40 @@
"Generate range checks for array accesses") \
\
develop_pd(bool, ImplicitNullChecks, \
- "generate code for implicit null checks") \
+ "Generate code for implicit null checks") \
\
product(bool, PrintSafepointStatistics, false, \
- "print statistics about safepoint synchronization") \
+ "Print statistics about safepoint synchronization") \
\
product(intx, PrintSafepointStatisticsCount, 300, \
- "total number of safepoint statistics collected " \
+ "Total number of safepoint statistics collected " \
"before printing them out") \
\
product(intx, PrintSafepointStatisticsTimeout, -1, \
- "print safepoint statistics only when safepoint takes" \
- " more than PrintSafepointSatisticsTimeout in millis") \
+ "Print safepoint statistics only when safepoint takes " \
+ "more than PrintSafepointSatisticsTimeout in millis") \
\
product(bool, TraceSafepointCleanupTime, false, \
- "print the break down of clean up tasks performed during" \
- " safepoint") \
+ "Print the break down of clean up tasks performed during " \
+ "safepoint") \
\
product(bool, Inline, true, \
- "enable inlining") \
+ "Enable inlining") \
\
product(bool, ClipInlining, true, \
- "clip inlining if aggregate method exceeds DesiredMethodLimit") \
+ "Clip inlining if aggregate method exceeds DesiredMethodLimit") \
\
develop(bool, UseCHA, true, \
- "enable CHA") \
+ "Enable CHA") \
\
product(bool, UseTypeProfile, true, \
"Check interpreter profile for historically monomorphic calls") \
\
notproduct(bool, TimeCompiler, false, \
- "time the compiler") \
+ "Time the compiler") \
\
diagnostic(bool, PrintInlining, false, \
- "prints inlining optimizations") \
+ "Print inlining optimizations") \
\
product(bool, UsePopCountInstruction, false, \
"Use population count instruction") \
@@ -2482,56 +2543,59 @@
"Print when methods are replaced do to recompilation") \
\
develop(bool, PrintMethodFlushing, false, \
- "print the nmethods being flushed") \
+ "Print the nmethods being flushed") \
\
develop(bool, UseRelocIndex, false, \
- "use an index to speed random access to relocations") \
+ "Use an index to speed random access to relocations") \
\
develop(bool, StressCodeBuffers, false, \
- "Exercise code buffer expansion and other rare state changes") \
+ "Exercise code buffer expansion and other rare state changes") \
\
diagnostic(bool, DebugNonSafepoints, trueInDebug, \
- "Generate extra debugging info for non-safepoints in nmethods") \
+ "Generate extra debugging information for non-safepoints in " \
+ "nmethods") \
\
product(bool, PrintVMOptions, false, \
- "Print flags that appeared on the command line") \
+ "Print flags that appeared on the command line") \
\
product(bool, IgnoreUnrecognizedVMOptions, false, \
- "Ignore unrecognized VM options") \
+ "Ignore unrecognized VM options") \
\
product(bool, PrintCommandLineFlags, false, \
- "Print flags specified on command line or set by ergonomics") \
+ "Print flags specified on command line or set by ergonomics") \
\
product(bool, PrintFlagsInitial, false, \
- "Print all VM flags before argument processing and exit VM") \
+ "Print all VM flags before argument processing and exit VM") \
\
product(bool, PrintFlagsFinal, false, \
- "Print all VM flags after argument and ergonomic processing") \
+ "Print all VM flags after argument and ergonomic processing") \
\
notproduct(bool, PrintFlagsWithComments, false, \
- "Print all VM flags with default values and descriptions and exit")\
+ "Print all VM flags with default values and descriptions and " \
+ "exit") \
\
diagnostic(bool, SerializeVMOutput, true, \
- "Use a mutex to serialize output to tty and hotspot.log") \
+ "Use a mutex to serialize output to tty and LogFile") \
\
diagnostic(bool, DisplayVMOutput, true, \
- "Display all VM output on the tty, independently of LogVMOutput") \
- \
- diagnostic(bool, LogVMOutput, trueInDebug, \
- "Save VM output to hotspot.log, or to LogFile") \
+ "Display all VM output on the tty, independently of LogVMOutput") \
+ \
+ diagnostic(bool, LogVMOutput, false, \
+ "Save VM output to LogFile") \
\
diagnostic(ccstr, LogFile, NULL, \
- "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
+ "If LogVMOutput or LogCompilation is on, save VM output to " \
+ "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
\
product(ccstr, ErrorFile, NULL, \
- "If an error occurs, save the error data to this file " \
- "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
+ "If an error occurs, save the error data to this file " \
+ "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
\
product(bool, DisplayVMOutputToStderr, false, \
- "If DisplayVMOutput is true, display all VM output to stderr") \
+ "If DisplayVMOutput is true, display all VM output to stderr") \
\
product(bool, DisplayVMOutputToStdout, false, \
- "If DisplayVMOutput is true, display all VM output to stdout") \
+ "If DisplayVMOutput is true, display all VM output to stdout") \
\
product(bool, UseHeavyMonitors, false, \
"use heavyweight instead of lightweight Java monitors") \
@@ -2539,6 +2603,9 @@
product(bool, PrintStringTableStatistics, false, \
"print statistics about the StringTable and SymbolTable") \
\
+ diagnostic(bool, VerifyStringTableAtExit, false, \
+ "verify StringTable contents at exit") \
+ \
notproduct(bool, PrintSymbolTableSizeHistogram, false, \
"print histogram of the symbol table") \
\
@@ -2552,7 +2619,7 @@
\
notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \
"Call fatal if the exception pointed by AbortVMOnException " \
- "has this message.") \
+ "has this message") \
\
develop(bool, DebugVtables, false, \
"add debugging code to vtable dispatch") \
@@ -2617,31 +2684,44 @@
product(bool, AggressiveOpts, false, \
"Enable aggressive optimizations - see arguments.cpp") \
\
+ product_pd(uintx, TypeProfileLevel, \
+ "=XYZ, with Z: Type profiling of arguments at call; " \
+ "Y: Type profiling of return value at call; " \
+ "X: Type profiling of parameters to methods; " \
+ "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \
+ \
+ product(intx, TypeProfileArgsLimit, 2, \
+ "max number of call arguments to consider for type profiling") \
+ \
+ product(intx, TypeProfileParmsLimit, 2, \
+ "max number of incoming parameters to consider for type profiling"\
+ ", -1 for all") \
+ \
/* statistics */ \
develop(bool, CountCompiledCalls, false, \
- "counts method invocations") \
+ "Count method invocations") \
\
notproduct(bool, CountRuntimeCalls, false, \
- "counts VM runtime calls") \
+ "Count VM runtime calls") \
\
develop(bool, CountJNICalls, false, \
- "counts jni method invocations") \
+ "Count jni method invocations") \
\
notproduct(bool, CountJVMCalls, false, \
- "counts jvm method invocations") \
+ "Count jvm method invocations") \
\
notproduct(bool, CountRemovableExceptions, false, \
- "count exceptions that could be replaced by branches due to " \
+ "Count exceptions that could be replaced by branches due to " \
"inlining") \
\
notproduct(bool, ICMissHistogram, false, \
- "produce histogram of IC misses") \
+ "Produce histogram of IC misses") \
\
notproduct(bool, PrintClassStatistics, false, \
- "prints class statistics at end of run") \
+ "Print class statistics at end of run") \
\
notproduct(bool, PrintMethodStatistics, false, \
- "prints method statistics at end of run") \
+ "Print method statistics at end of run") \
\
/* interpreter */ \
develop(bool, ClearInterpreterLocals, false, \
@@ -2655,7 +2735,7 @@
"Rewrite frequently used bytecode pairs into a single bytecode") \
\
diagnostic(bool, PrintInterpreter, false, \
- "Prints the generated interpreter code") \
+ "Print the generated interpreter code") \
\
product(bool, UseInterpreter, true, \
"Use interpreter for non-compiled methods") \
@@ -2673,8 +2753,8 @@
"Use fast method entry code for accessor methods") \
\
product_pd(bool, UseOnStackReplacement, \
- "Use on stack replacement, calls runtime if invoc. counter " \
- "overflows in loop") \
+ "Use on stack replacement, calls runtime if invoc. counter " \
+ "overflows in loop") \
\
notproduct(bool, TraceOnStackReplacement, false, \
"Trace on stack replacement") \
@@ -2722,10 +2802,10 @@
"Trace frequency based inlining") \
\
develop_pd(bool, InlineIntrinsics, \
- "Inline intrinsics that can be statically resolved") \
+ "Inline intrinsics that can be statically resolved") \
\
product_pd(bool, ProfileInterpreter, \
- "Profile at the bytecode level during interpretation") \
+ "Profile at the bytecode level during interpretation") \
\
develop(bool, TraceProfileInterpreter, false, \
"Trace profiling at the bytecode level during interpretation. " \
@@ -2740,7 +2820,7 @@
"CompileThreshold) before using the method's profile") \
\
develop(bool, PrintMethodData, false, \
- "Print the results of +ProfileInterpreter at end of run") \
+ "Print the results of +ProfileInterpreter at end of run") \
\
develop(bool, VerifyDataPointer, trueInDebug, \
"Verify the method data pointer during interpreter profiling") \
@@ -2755,7 +2835,7 @@
\
/* compilation */ \
product(bool, UseCompiler, true, \
- "use compilation") \
+ "Use Just-In-Time compilation") \
\
develop(bool, TraceCompilationPolicy, false, \
"Trace compilation policy") \
@@ -2764,20 +2844,21 @@
"Time the compilation policy") \
\
product(bool, UseCounterDecay, true, \
- "adjust recompilation counters") \
+ "Adjust recompilation counters") \
\
develop(intx, CounterHalfLifeTime, 30, \
- "half-life time of invocation counters (in secs)") \
+ "Half-life time of invocation counters (in seconds)") \
\
develop(intx, CounterDecayMinIntervalLength, 500, \
- "Min. ms. between invocation of CounterDecay") \
+ "The minimum interval (in milliseconds) between invocation of " \
+ "CounterDecay") \
\
product(bool, AlwaysCompileLoopMethods, false, \
- "when using recompilation, never interpret methods " \
+ "When using recompilation, never interpret methods " \
"containing loops") \
\
product(bool, DontCompileHugeMethods, true, \
- "don't compile methods > HugeMethodLimit") \
+ "Do not compile methods > HugeMethodLimit") \
\
/* Bytecode escape analysis estimation. */ \
product(bool, EstimateArgEscape, true, \
@@ -2787,10 +2868,10 @@
"How much tracing to do of bytecode escape analysis estimates") \
\
product(intx, MaxBCEAEstimateLevel, 5, \
- "Maximum number of nested calls that are analyzed by BC EA.") \
+ "Maximum number of nested calls that are analyzed by BC EA") \
\
product(intx, MaxBCEAEstimateSize, 150, \
- "Maximum bytecode size of a method to be analyzed by BC EA.") \
+ "Maximum bytecode size of a method to be analyzed by BC EA") \
\
product(intx, AllocatePrefetchStyle, 1, \
"0 = no prefetch, " \
@@ -2805,7 +2886,8 @@
"Number of lines to prefetch ahead of array allocation pointer") \
\
product(intx, AllocateInstancePrefetchLines, 1, \
- "Number of lines to prefetch ahead of instance allocation pointer") \
+ "Number of lines to prefetch ahead of instance allocation " \
+ "pointer") \
\
product(intx, AllocatePrefetchStepSize, 16, \
"Step size in bytes of sequential prefetch instructions") \
@@ -2825,8 +2907,8 @@
"(0 means off)") \
\
product(intx, MaxJavaStackTraceDepth, 1024, \
- "Max. no. of lines in the stack trace for Java exceptions " \
- "(0 means all)") \
+ "The maximum number of lines in the stack trace for Java " \
+ "exceptions (0 means all)") \
\
NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \
"Guarantee a safepoint (at least) every so many milliseconds " \
@@ -2845,11 +2927,15 @@
product(intx, NmethodSweepCheckInterval, 5, \
"Compilers wake up every n seconds to possibly sweep nmethods") \
\
+ product(intx, NmethodSweepActivity, 10, \
+ "Removes cold nmethods from code cache if > 0. Higher values " \
+ "result in more aggressive sweeping") \
+ \
notproduct(bool, LogSweeper, false, \
- "Keep a ring buffer of sweeper activity") \
+ "Keep a ring buffer of sweeper activity") \
\
notproduct(intx, SweeperLogEntries, 1024, \
- "Number of records in the ring buffer of sweeper activity") \
+ "Number of records in the ring buffer of sweeper activity") \
\
notproduct(intx, MemProfilingInterval, 500, \
"Time between each invocation of the MemProfiler") \
@@ -2892,34 +2978,35 @@
"less than this") \
\
product(intx, MaxInlineSize, 35, \
- "maximum bytecode size of a method to be inlined") \
+ "The maximum bytecode size of a method to be inlined") \
\
product_pd(intx, FreqInlineSize, \
- "maximum bytecode size of a frequent method to be inlined") \
+ "The maximum bytecode size of a frequent method to be inlined") \
\
product(intx, MaxTrivialSize, 6, \
- "maximum bytecode size of a trivial method to be inlined") \
+ "The maximum bytecode size of a trivial method to be inlined") \
\
product(intx, MinInliningThreshold, 250, \
- "min. invocation count a method needs to have to be inlined") \
+ "The minimum invocation count a method needs to have to be " \
+ "inlined") \
\
develop(intx, MethodHistogramCutoff, 100, \
- "cutoff value for method invoc. histogram (+CountCalls)") \
+ "The cutoff value for method invocation histogram (+CountCalls)") \
\
develop(intx, ProfilerNumberOfInterpretedMethods, 25, \
- "# of interpreted methods to show in profile") \
+ "Number of interpreted methods to show in profile") \
\
develop(intx, ProfilerNumberOfCompiledMethods, 25, \
- "# of compiled methods to show in profile") \
+ "Number of compiled methods to show in profile") \
\
develop(intx, ProfilerNumberOfStubMethods, 25, \
- "# of stub methods to show in profile") \
+ "Number of stub methods to show in profile") \
\
develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \
- "# of runtime stub nodes to show in profile") \
+ "Number of runtime stub nodes to show in profile") \
\
product(intx, ProfileIntervalsTicks, 100, \
- "# of ticks between printing of interval profile " \
+ "Number of ticks between printing of interval profile " \
"(+ProfileIntervals)") \
\
notproduct(intx, ScavengeALotInterval, 1, \
@@ -2940,7 +3027,7 @@
\
develop(intx, MinSleepInterval, 1, \
"Minimum sleep() interval (milliseconds) when " \
- "ConvertSleepToYield is off (used for SOLARIS)") \
+ "ConvertSleepToYield is off (used for Solaris)") \
\
develop(intx, ProfilerPCTickThreshold, 15, \
"Number of ticks in a PC buckets to be a hotspot") \
@@ -2955,22 +3042,22 @@
"Mark nmethods non-entrant at registration") \
\
diagnostic(intx, MallocVerifyInterval, 0, \
- "if non-zero, verify C heap after every N calls to " \
+ "If non-zero, verify C heap after every N calls to " \
"malloc/realloc/free") \
\
diagnostic(intx, MallocVerifyStart, 0, \
- "if non-zero, start verifying C heap after Nth call to " \
+ "If non-zero, start verifying C heap after Nth call to " \
"malloc/realloc/free") \
\
diagnostic(uintx, MallocMaxTestWords, 0, \
- "if non-zero, max # of Words that malloc/realloc can allocate " \
- "(for testing only)") \
+ "If non-zero, maximum number of words that malloc/realloc can " \
+ "allocate (for testing only)") \
\
product(intx, TypeProfileWidth, 2, \
- "number of receiver types to record in call/cast profile") \
+ "Number of receiver types to record in call/cast profile") \
\
develop(intx, BciProfileWidth, 2, \
- "number of return bci's to record in ret profile") \
+ "Number of return bci's to record in ret profile") \
\
product(intx, PerMethodRecompilationCutoff, 400, \
"After recompiling N times, stay in the interpreter (-1=>'Inf')") \
@@ -3037,7 +3124,7 @@
"Percentage of Eden that can be wasted") \
\
product(uintx, TLABRefillWasteFraction, 64, \
- "Max TLAB waste at a refill (internal fragmentation)") \
+ "Maximum TLAB waste at a refill (internal fragmentation)") \
\
product(uintx, TLABWasteIncrement, 4, \
"Increment allowed waste at slow allocation") \
@@ -3046,7 +3133,7 @@
"Ratio of eden/survivor space size") \
\
product(uintx, NewRatio, 2, \
- "Ratio of new/old generation sizes") \
+ "Ratio of old/new generation sizes") \
\
product_pd(uintx, NewSizeThreadIncrease, \
"Additional size added to desired new generation size per " \
@@ -3058,33 +3145,39 @@
product(uintx, MaxMetaspaceSize, max_uintx, \
"Maximum size of Metaspaces (in bytes)") \
\
- product(uintx, ClassMetaspaceSize, 1*G, \
- "Maximum size of InstanceKlass area in Metaspace used for " \
- "UseCompressedKlassPointers") \
+ product(uintx, CompressedClassSpaceSize, 1*G, \
+ "Maximum size of class area in Metaspace when compressed " \
+ "class pointers are used") \
\
product(uintx, MinHeapFreeRatio, 40, \
- "Min percentage of heap free after GC to avoid expansion") \
+ "The minimum percentage of heap free after GC to avoid expansion."\
+ " For most GCs this applies to the old generation. In G1 it" \
+ " applies to the whole heap. Not supported by ParallelGC.") \
\
product(uintx, MaxHeapFreeRatio, 70, \
- "Max percentage of heap free after GC to avoid shrinking") \
+ "The maximum percentage of heap free after GC to avoid shrinking."\
+ " For most GCs this applies to the old generation. In G1 it" \
+ " applies to the whole heap. Not supported by ParallelGC.") \
\
product(intx, SoftRefLRUPolicyMSPerMB, 1000, \
"Number of milliseconds per MB of free space in the heap") \
\
product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
- "Min change in heap space due to GC (in bytes)") \
+ "The minimum change in heap space due to GC (in bytes)") \
\
product(uintx, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
- "Min expansion of Metaspace (in bytes)") \
+ "The minimum expansion of Metaspace (in bytes)") \
\
product(uintx, MinMetaspaceFreeRatio, 40, \
- "Min percentage of Metaspace free after GC to avoid expansion") \
+ "The minimum percentage of Metaspace free after GC to avoid " \
+ "expansion") \
\
product(uintx, MaxMetaspaceFreeRatio, 70, \
- "Max percentage of Metaspace free after GC to avoid shrinking") \
+ "The maximum percentage of Metaspace free after GC to avoid " \
+ "shrinking") \
\
product(uintx, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
- "Max expansion of Metaspace without full GC (in bytes)") \
+ "The maximum expansion of Metaspace without full GC (in bytes)") \
\
product(uintx, QueuedAllocationWarningCount, 0, \
"Number of times an allocation that queues behind a GC " \
@@ -3106,13 +3199,14 @@
"Desired percentage of survivor space used after scavenge") \
\
product(uintx, MarkSweepDeadRatio, 5, \
- "Percentage (0-100) of the old gen allowed as dead wood." \
- "Serial mark sweep treats this as both the min and max value." \
- "CMS uses this value only if it falls back to mark sweep." \
- "Par compact uses a variable scale based on the density of the" \
- "generation and treats this as the max value when the heap is" \
- "either completely full or completely empty. Par compact also" \
- "has a smaller default value; see arguments.cpp.") \
+ "Percentage (0-100) of the old gen allowed as dead wood. " \
+ "Serial mark sweep treats this as both the minimum and maximum " \
+ "value. " \
+ "CMS uses this value only if it falls back to mark sweep. " \
+ "Par compact uses a variable scale based on the density of the " \
+ "generation and treats this as the maximum value when the heap " \
+ "is either completely full or completely empty. Par compact " \
+ "also has a smaller default value; see arguments.cpp.") \
\
product(uintx, MarkSweepAlwaysCompactCount, 4, \
"How often should we fully compact the heap (ignoring the dead " \
@@ -3131,27 +3225,27 @@
"Census for CMS' FreeListSpace") \
\
develop(uintx, GCExpandToAllocateDelayMillis, 0, \
- "Delay in ms between expansion and allocation") \
+ "Delay between expansion and allocation (in milliseconds)") \
\
develop(uintx, GCWorkerDelayMillis, 0, \
- "Delay in ms in scheduling GC workers") \
+ "Delay in scheduling GC workers (in milliseconds)") \
\
product(intx, DeferThrSuspendLoopCount, 4000, \
"(Unstable) Number of times to iterate in safepoint loop " \
- " before blocking VM threads ") \
+ "before blocking VM threads ") \
\
product(intx, DeferPollingPageLoopCount, -1, \
"(Unsafe,Unstable) Number of iterations in safepoint loop " \
"before changing safepoint polling page to RO ") \
\
- product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
+ product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \
\
product(bool, PSChunkLargeArrays, true, \
- "true: process large arrays in chunks") \
+ "Process large arrays in chunks") \
\
product(uintx, GCDrainStackTargetSize, 64, \
- "how many entries we'll try to leave on the stack during " \
- "parallel GC") \
+ "Number of entries we will try to leave on the stack " \
+ "during parallel gc") \
\
/* stack parameters */ \
product_pd(intx, StackYellowPages, \
@@ -3161,8 +3255,8 @@
"Number of red zone (unrecoverable overflows) pages") \
\
product_pd(intx, StackShadowPages, \
- "Number of shadow zone (for overflow checking) pages" \
- " this should exceed the depth of the VM and native call stack") \
+ "Number of shadow zone (for overflow checking) pages " \
+ "this should exceed the depth of the VM and native call stack") \
\
product_pd(intx, ThreadStackSize, \
"Thread Stack Size (in Kbytes)") \
@@ -3203,60 +3297,51 @@
"Reserved code cache size (in bytes) - maximum code cache size") \
\
product(uintx, CodeCacheMinimumFreeSpace, 500*K, \
- "When less than X space left, we stop compiling.") \
+ "When less than X space left, we stop compiling") \
\
product_pd(uintx, CodeCacheExpansionSize, \
"Code cache expansion size (in bytes)") \
\
develop_pd(uintx, CodeCacheMinBlockLength, \
- "Minimum number of segments in a code cache block.") \
+ "Minimum number of segments in a code cache block") \
\
notproduct(bool, ExitOnFullCodeCache, false, \
- "Exit the VM if we fill the code cache.") \
+ "Exit the VM if we fill the code cache") \
\
product(bool, UseCodeCacheFlushing, true, \
"Attempt to clean the code cache before shutting off compiler") \
\
- product(intx, MinCodeCacheFlushingInterval, 30, \
- "Min number of seconds between code cache cleaning sessions") \
- \
- product(uintx, CodeCacheFlushingMinimumFreeSpace, 1500*K, \
- "When less than X space left, start code cache cleaning") \
- \
- product(uintx, CodeCacheFlushingFraction, 2, \
- "Fraction of the code cache that is flushed when full") \
- \
/* interpreter debugging */ \
develop(intx, BinarySwitchThreshold, 5, \
"Minimal number of lookupswitch entries for rewriting to binary " \
"switch") \
\
develop(intx, StopInterpreterAt, 0, \
- "Stops interpreter execution at specified bytecode number") \
+ "Stop interpreter execution at specified bytecode number") \
\
develop(intx, TraceBytecodesAt, 0, \
- "Traces bytecodes starting with specified bytecode number") \
+ "Trace bytecodes starting with specified bytecode number") \
\
/* compiler interface */ \
develop(intx, CIStart, 0, \
- "the id of the first compilation to permit") \
+ "The id of the first compilation to permit") \
\
develop(intx, CIStop, -1, \
- "the id of the last compilation to permit") \
+ "The id of the last compilation to permit") \
\
develop(intx, CIStartOSR, 0, \
- "the id of the first osr compilation to permit " \
+ "The id of the first osr compilation to permit " \
"(CICountOSR must be on)") \
\
develop(intx, CIStopOSR, -1, \
- "the id of the last osr compilation to permit " \
+ "The id of the last osr compilation to permit " \
"(CICountOSR must be on)") \
\
develop(intx, CIBreakAtOSR, -1, \
- "id of osr compilation to break at") \
+ "The id of osr compilation to break at") \
\
develop(intx, CIBreakAt, -1, \
- "id of compilation to break at") \
+ "The id of compilation to break at") \
\
product(ccstrlist, CompileOnly, "", \
"List of methods (pkg/class.name) to restrict compilation to") \
@@ -3275,11 +3360,11 @@
"[default: ./replay_pid%p.log] (%p replaced with pid)") \
\
develop(intx, ReplaySuppressInitializers, 2, \
- "Controls handling of class initialization during replay" \
- "0 - don't do anything special" \
- "1 - treat all class initializers as empty" \
- "2 - treat class initializers for application classes as empty" \
- "3 - allow all class initializers to run during bootstrap but" \
+ "Control handling of class initialization during replay: " \
+ "0 - don't do anything special; " \
+ "1 - treat all class initializers as empty; " \
+ "2 - treat class initializers for application classes as empty; " \
+ "3 - allow all class initializers to run during bootstrap but " \
" pretend they are empty after starting replay") \
\
develop(bool, ReplayIgnoreInitErrors, false, \
@@ -3308,14 +3393,15 @@
"0 : Normal. "\
" VM chooses priorities that are appropriate for normal "\
" applications. On Solaris NORM_PRIORITY and above are mapped "\
- " to normal native priority. Java priorities below NORM_PRIORITY"\
- " map to lower native priority values. On Windows applications"\
- " are allowed to use higher native priorities. However, with "\
- " ThreadPriorityPolicy=0, VM will not use the highest possible"\
- " native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may "\
- " interfere with system threads. On Linux thread priorities "\
- " are ignored because the OS does not support static priority "\
- " in SCHED_OTHER scheduling class which is the only choice for"\
+ " to normal native priority. Java priorities below " \
+ " NORM_PRIORITY map to lower native priority values. On "\
+ " Windows applications are allowed to use higher native "\
+ " priorities. However, with ThreadPriorityPolicy=0, VM will "\
+ " not use the highest possible native priority, "\
+ " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\
+ " system threads. On Linux thread priorities are ignored "\
+ " because the OS does not support static priority in "\
+ " SCHED_OTHER scheduling class which is the only choice for "\
" non-root, non-realtime applications. "\
"1 : Aggressive. "\
" Java thread priorities map over to the entire range of "\
@@ -3346,16 +3432,35 @@
product(bool, VMThreadHintNoPreempt, false, \
"(Solaris only) Give VM thread an extra quanta") \
\
- product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
- product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
+ product(intx, JavaPriority1_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority2_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority3_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority4_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority5_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority6_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority7_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority8_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority9_To_OSPriority, -1, \
+ "Map Java priorities to OS priorities") \
+ \
+ product(intx, JavaPriority10_To_OSPriority,-1, \
+ "Map Java priorities to OS priorities") \
\
experimental(bool, UseCriticalJavaThreadPriority, false, \
"Java thread priority 10 maps to critical scheduling priority") \
@@ -3386,37 +3491,38 @@
"Used with +TraceLongCompiles") \
\
product(intx, StarvationMonitorInterval, 200, \
- "Pause between each check in ms") \
+ "Pause between each check (in milliseconds)") \
\
/* recompilation */ \
product_pd(intx, CompileThreshold, \
"number of interpreted method invocations before (re-)compiling") \
\
product_pd(intx, BackEdgeThreshold, \
- "Interpreter Back edge threshold at which an OSR compilation is invoked")\
+ "Interpreter Back edge threshold at which an OSR compilation is " \
+ "invoked") \
\
product(intx, Tier0InvokeNotifyFreqLog, 7, \
- "Interpreter (tier 0) invocation notification frequency.") \
+ "Interpreter (tier 0) invocation notification frequency") \
\
product(intx, Tier2InvokeNotifyFreqLog, 11, \
- "C1 without MDO (tier 2) invocation notification frequency.") \
+ "C1 without MDO (tier 2) invocation notification frequency") \
\
product(intx, Tier3InvokeNotifyFreqLog, 10, \
"C1 with MDO profiling (tier 3) invocation notification " \
- "frequency.") \
+ "frequency") \
\
product(intx, Tier23InlineeNotifyFreqLog, 20, \
"Inlinee invocation (tiers 2 and 3) notification frequency") \
\
product(intx, Tier0BackedgeNotifyFreqLog, 10, \
- "Interpreter (tier 0) invocation notification frequency.") \
+ "Interpreter (tier 0) invocation notification frequency") \
\
product(intx, Tier2BackedgeNotifyFreqLog, 14, \
- "C1 without MDO (tier 2) invocation notification frequency.") \
+ "C1 without MDO (tier 2) invocation notification frequency") \
\
product(intx, Tier3BackedgeNotifyFreqLog, 13, \
"C1 with MDO profiling (tier 3) invocation notification " \
- "frequency.") \
+ "frequency") \
\
product(intx, Tier2CompileThreshold, 0, \
"threshold at which tier 2 compilation is invoked") \
@@ -3433,7 +3539,7 @@
\
product(intx, Tier3CompileThreshold, 2000, \
"Threshold at which tier 3 compilation is invoked (invocation " \
- "minimum must be satisfied.") \
+ "minimum must be satisfied") \
\
product(intx, Tier3BackEdgeThreshold, 60000, \
"Back edge threshold at which tier 3 OSR compilation is invoked") \
@@ -3447,7 +3553,7 @@
\
product(intx, Tier4CompileThreshold, 15000, \
"Threshold at which tier 4 compilation is invoked (invocation " \
- "minimum must be satisfied.") \
+ "minimum must be satisfied") \
\
product(intx, Tier4BackEdgeThreshold, 40000, \
"Back edge threshold at which tier 4 OSR compilation is invoked") \
@@ -3476,12 +3582,12 @@
"Stop at given compilation level") \
\
product(intx, Tier0ProfilingStartPercentage, 200, \
- "Start profiling in interpreter if the counters exceed tier 3" \
+ "Start profiling in interpreter if the counters exceed tier 3 " \
"thresholds by the specified percentage") \
\
product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \
- "Increase the compile threshold for C1 compilation if the code" \
- "cache is filled by the specified percentage.") \
+ "Increase the compile threshold for C1 compilation if the code " \
+ "cache is filled by the specified percentage") \
\
product(intx, TieredRateUpdateMinTime, 1, \
"Minimum rate sampling interval (in milliseconds)") \
@@ -3496,24 +3602,26 @@
"Print tiered events notifications") \
\
product_pd(intx, OnStackReplacePercentage, \
- "NON_TIERED number of method invocations/branches (expressed as %"\
- "of CompileThreshold) before (re-)compiling OSR code") \
+ "NON_TIERED number of method invocations/branches (expressed as " \
+ "% of CompileThreshold) before (re-)compiling OSR code") \
\
product(intx, InterpreterProfilePercentage, 33, \
- "NON_TIERED number of method invocations/branches (expressed as %"\
- "of CompileThreshold) before profiling in the interpreter") \
+ "NON_TIERED number of method invocations/branches (expressed as " \
+ "% of CompileThreshold) before profiling in the interpreter") \
\
develop(intx, MaxRecompilationSearchLength, 10, \
- "max. # frames to inspect searching for recompilee") \
+ "The maximum number of frames to inspect when searching for " \
+ "recompilee") \
\
develop(intx, MaxInterpretedSearchLength, 3, \
- "max. # interp. frames to skip when searching for recompilee") \
+ "The maximum number of interpreted frames to skip when searching "\
+ "for recompilee") \
\
develop(intx, DesiredMethodLimit, 8000, \
- "desired max. method size (in bytecodes) after inlining") \
+ "The desired maximum method size (in bytecodes) after inlining") \
\
develop(intx, HugeMethodLimit, 8000, \
- "don't compile methods larger than this if " \
+ "Don't compile methods larger than this if " \
"+DontCompileHugeMethods") \
\
/* New JDK 1.4 reflection implementation */ \
@@ -3534,6 +3642,8 @@
"Temporary flag for transition to AbstractMethodError wrapped " \
"in InvocationTargetException. See 6531596") \
\
+ develop(bool, VerifyLambdaBytecodes, false, \
+ "Force verification of jdk 8 lambda metafactory bytecodes") \
\
develop(intx, FastSuperclassLimit, 8, \
"Depth of hardwired instanceof accelerator array") \
@@ -3557,18 +3667,19 @@
/* flags for performance data collection */ \
\
product(bool, UsePerfData, falseInEmbedded, \
- "Flag to disable jvmstat instrumentation for performance testing" \
- "and problem isolation purposes.") \
+ "Flag to disable jvmstat instrumentation for performance testing "\
+ "and problem isolation purposes") \
\
product(bool, PerfDataSaveToFile, false, \
"Save PerfData memory to hsperfdata_<pid> file on exit") \
\
product(ccstr, PerfDataSaveFile, NULL, \
- "Save PerfData memory to the specified absolute pathname," \
- "%p in the file name if present will be replaced by pid") \
- \
- product(intx, PerfDataSamplingInterval, 50 /*ms*/, \
- "Data sampling interval in milliseconds") \
+ "Save PerfData memory to the specified absolute pathname. " \
+ "The string %p in the file name (if present) " \
+ "will be replaced by pid") \
+ \
+ product(intx, PerfDataSamplingInterval, 50, \
+ "Data sampling interval (in milliseconds)") \
\
develop(bool, PerfTraceDataCreation, false, \
"Trace creation of Performance Data Entries") \
@@ -3593,7 +3704,7 @@
"Bypass Win32 file system criteria checks (Windows Only)") \
\
product(intx, UnguardOnExecutionViolation, 0, \
- "Unguard page and retry on no-execute fault (Win32 only)" \
+ "Unguard page and retry on no-execute fault (Win32 only) " \
"0=off, 1=conservative, 2=aggressive") \
\
/* Serviceability Support */ \
@@ -3602,7 +3713,7 @@
"Create JMX Management Server") \
\
product(bool, DisableAttachMechanism, false, \
- "Disable mechanism that allows tools to attach to this VM") \
+ "Disable mechanism that allows tools to attach to this VM") \
\
product(bool, StartAttachListener, false, \
"Always start Attach Listener at VM startup") \
@@ -3625,9 +3736,9 @@
"Require shared spaces for metadata") \
\
product(bool, DumpSharedSpaces, false, \
- "Special mode: JVM reads a class list, loads classes, builds " \
- "shared spaces, and dumps the shared spaces to a file to be " \
- "used in future JVM runs.") \
+ "Special mode: JVM reads a class list, loads classes, builds " \
+ "shared spaces, and dumps the shared spaces to a file to be " \
+ "used in future JVM runs") \
\
product(bool, PrintSharedSpaces, false, \
"Print usage of shared spaces") \
@@ -3667,6 +3778,9 @@
experimental(bool, TrustFinalNonStaticFields, false, \
"trust final non-static declarations for constant folding") \
\
+ experimental(bool, FoldStableValues, false, \
+ "Private flag to control optimizations for stable variables") \
+ \
develop(bool, TraceInvokeDynamic, false, \
"trace internal invoke dynamic operations") \
\
@@ -3697,27 +3811,24 @@
"Relax the access control checks in the verifier") \
\
diagnostic(bool, PrintDTraceDOF, false, \
- "Print the DTrace DOF passed to the system for JSDT probes") \
+ "Print the DTrace DOF passed to the system for JSDT probes") \
\
product(uintx, StringTableSize, defaultStringTableSize, \
"Number of buckets in the interned String table") \
\
+ experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \
+ "Number of buckets in the JVM internal Symbol table") \
+ \
develop(bool, TraceDefaultMethods, false, \
"Trace the default method processing steps") \
\
- develop(bool, ParseAllGenericSignatures, false, \
- "Parse all generic signatures while classloading") \
- \
develop(bool, VerifyGenericSignatures, false, \
"Abort VM on erroneous or inconsistent generic signatures") \
\
- product(bool, ParseGenericDefaults, false, \
- "Parse generic signatures for default method handling") \
- \
product(bool, UseVMInterruptibleIO, false, \
"(Unstable, Solaris-specific) Thread interrupt before or with " \
- "EINTR for I/O operations results in OS_INTRPT. The default value"\
- " of this flag is true for JDK 6 and earlier") \
+ "EINTR for I/O operations results in OS_INTRPT. The default " \
+ "value of this flag is true for JDK 6 and earlier") \
\
diagnostic(bool, WhiteBoxAPI, false, \
"Enable internal testing APIs") \
@@ -3738,29 +3849,29 @@
\
product(bool, EnableTracing, false, \
"Enable event-based tracing") \
+ \
product(bool, UseLockedTracing, false, \
"Use locked-tracing when doing event-based tracing")
-
/*
* Macros for factoring of globals
*/
// Interface macros
-#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
-#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
-#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
+#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
+#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name;
+#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
-#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
-#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
+#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
+#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
#ifdef PRODUCT
-#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value;
-#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name;
-#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
+#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value;
+#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name;
+#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name;
#else
-#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
-#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
-#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
+#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name;
+#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name;
+#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name;
#endif
// Special LP64 flags, product only needed for now.
#ifdef _LP64
@@ -3770,23 +3881,23 @@
#endif // _LP64
// Implementation macros
-#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
-#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
-#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
+#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value;
+#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name;
+#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
-#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
-#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
+#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
+#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
#ifdef PRODUCT
-#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
-#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) /* flag name is constant */
-#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
+#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value;
+#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name;
+#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value;
#else
-#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
-#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
-#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
+#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
+#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name;
+#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
#endif
#ifdef _LP64
-#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
+#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value;
#else
#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
#endif // _LP64