| Safe Haskell | Safe-Inferred |
|---|---|
| Language | Haskell2010 |
GHC.RTS.Flags
Description
Accessors to GHC RTS flags.
Descriptions of flags can be seen in
GHC User's Guide,
or by running RTS help message using +RTS --help.
Since: base-4.8.0.0
Synopsis
- type RtsTime = Word64
- data RTSFlags = RTSFlags {}
- data GiveGCStats
- data GCFlags = GCFlags {
- statsFile :: Maybe FilePath
- giveStats :: GiveGCStats
- maxStkSize :: Word32
- initialStkSize :: Word32
- stkChunkSize :: Word32
- stkChunkBufferSize :: Word32
- maxHeapSize :: Word32
- minAllocAreaSize :: Word32
- largeAllocLim :: Word32
- nurseryChunkSize :: Word32
- minOldGenSize :: Word32
- heapSizeSuggestion :: Word32
- heapSizeSuggestionAuto :: Bool
- oldGenFactor :: Double
- returnDecayFactor :: Double
- pcFreeHeap :: Double
- generations :: Word32
- squeezeUpdFrames :: Bool
- compact :: Bool
- compactThreshold :: Double
- sweep :: Bool
- ringBell :: Bool
- idleGCDelayTime :: RtsTime
- doIdleGC :: Bool
- heapBase :: Word
- allocLimitGrace :: Word
- numa :: Bool
- numaMask :: Word
- data ConcFlags = ConcFlags {}
- data MiscFlags = MiscFlags {
- tickInterval :: RtsTime
- installSignalHandlers :: Bool
- installSEHHandlers :: Bool
- generateCrashDumpFile :: Bool
- generateStackTrace :: Bool
- machineReadable :: Bool
- disableDelayedOsMemoryReturn :: Bool
- internalCounters :: Bool
- linkerAlwaysPic :: Bool
- linkerMemBase :: Word
- ioManager :: IoSubSystem
- numIoWorkerThreads :: Word32
- data DebugFlags = DebugFlags {}
- data DoCostCentres
- data CCFlags = CCFlags {}
- data DoHeapProfile
- data ProfFlags = ProfFlags {
- doHeapProfile :: DoHeapProfile
- heapProfileInterval :: RtsTime
- heapProfileIntervalTicks :: Word
- startHeapProfileAtStartup :: Bool
- showCCSOnException :: Bool
- maxRetainerSetSize :: Word
- ccsLength :: Word
- modSelector :: Maybe String
- descrSelector :: Maybe String
- typeSelector :: Maybe String
- ccSelector :: Maybe String
- ccsSelector :: Maybe String
- retainerSelector :: Maybe String
- bioSelector :: Maybe String
- data DoTrace
- data TraceFlags = TraceFlags {
- tracing :: DoTrace
- timestamp :: Bool
- traceScheduler :: Bool
- traceGc :: Bool
- traceNonmovingGc :: Bool
- sparksSampled :: Bool
- sparksFull :: Bool
- user :: Bool
- data TickyFlags = TickyFlags {}
- data ParFlags = ParFlags {}
- data IoSubSystem
- getRTSFlags :: IO RTSFlags
- getGCFlags :: IO GCFlags
- getConcFlags :: IO ConcFlags
- getMiscFlags :: IO MiscFlags
- getIoManagerFlag :: IO IoSubSystem
- getDebugFlags :: IO DebugFlags
- getCCFlags :: IO CCFlags
- getProfFlags :: IO ProfFlags
- getTraceFlags :: IO TraceFlags
- getTickyFlags :: IO TickyFlags
- getParFlags :: IO ParFlags
Documentation
Parameters of the runtime system
Since: base-4.8.0.0
Constructors
| RTSFlags | |
Fields | |
Instances
data GiveGCStats Source #
Should we produce a summary of the garbage collector statistics after the program has exited?
Since: base-4.8.2.0
Instances
Parameters of the garbage collector.
Since: base-4.8.0.0
Constructors
| GCFlags | |
Fields
| |
Instances
Parameters concerning context switching
Since: base-4.8.0.0
Constructors
| ConcFlags | |
Fields | |
Instances
| Generic ConcFlags # | |
| Show ConcFlags # | Since: base-4.8.0.0 |
| type Rep ConcFlags # | Since: base-4.15.0.0 |
Defined in GHC.RTS.Flags type Rep ConcFlags = D1 ('MetaData "ConcFlags" "GHC.RTS.Flags" "base" 'False) (C1 ('MetaCons "ConcFlags" 'PrefixI 'True) (S1 ('MetaSel ('Just "ctxtSwitchTime") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 RtsTime) :*: S1 ('MetaSel ('Just "ctxtSwitchTicks") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int))) | |
Miscellaneous parameters
Since: base-4.8.0.0
Constructors
| MiscFlags | |
Fields
| |
Instances
data DebugFlags Source #
Flags to control debugging output & extra checking in various subsystems.
Since: base-4.8.0.0
Constructors
| DebugFlags | |
Fields
| |
Instances
data DoCostCentres Source #
Should the RTS produce a cost-center summary?
Since: base-4.8.2.0
Instances
Parameters pertaining to the cost-center profiler.
Since: base-4.8.0.0
Constructors
| CCFlags | |
Fields | |
Instances
| Generic CCFlags # | |
| Show CCFlags # | Since: base-4.8.0.0 |
| type Rep CCFlags # | Since: base-4.15.0.0 |
Defined in GHC.RTS.Flags type Rep CCFlags = D1 ('MetaData "CCFlags" "GHC.RTS.Flags" "base" 'False) (C1 ('MetaCons "CCFlags" 'PrefixI 'True) (S1 ('MetaSel ('Just "doCostCentres") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 DoCostCentres) :*: (S1 ('MetaSel ('Just "profilerTicks") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int) :*: S1 ('MetaSel ('Just "msecsPerTick") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int)))) | |
data DoHeapProfile Source #
What sort of heap profile are we collecting?
Since: base-4.8.2.0
Constructors
| NoHeapProfiling | |
| HeapByCCS | |
| HeapByMod | |
| HeapByDescr | |
| HeapByType | |
| HeapByRetainer | |
| HeapByLDV | |
| HeapByClosureType | |
| HeapByInfoTable |
Instances
Parameters of the cost-center profiler
Since: base-4.8.0.0
Constructors
| ProfFlags | |
Fields
| |
Instances
Is event tracing enabled?
Since: base-4.8.2.0
Constructors
| TraceNone | no tracing |
| TraceEventLog | send tracing events to the event log |
| TraceStderr | send tracing events to |
Instances
| Enum DoTrace # | Since: base-4.8.0.0 |
Defined in GHC.RTS.Flags Methods succ :: DoTrace -> DoTrace Source # pred :: DoTrace -> DoTrace Source # toEnum :: Int -> DoTrace Source # fromEnum :: DoTrace -> Int Source # enumFrom :: DoTrace -> [DoTrace] Source # enumFromThen :: DoTrace -> DoTrace -> [DoTrace] Source # enumFromTo :: DoTrace -> DoTrace -> [DoTrace] Source # enumFromThenTo :: DoTrace -> DoTrace -> DoTrace -> [DoTrace] Source # | |
| Generic DoTrace # | |
| Show DoTrace # | Since: base-4.8.0.0 |
| type Rep DoTrace # | Since: base-4.15.0.0 |
Defined in GHC.RTS.Flags | |
data TraceFlags Source #
Parameters pertaining to event tracing
Since: base-4.8.0.0
Constructors
| TraceFlags | |
Fields
| |
Instances
data TickyFlags Source #
Parameters pertaining to ticky-ticky profiler
Since: base-4.8.0.0
Constructors
| TickyFlags | |
Fields
| |
Instances
| Generic TickyFlags # | |
Defined in GHC.RTS.Flags | |
| Show TickyFlags # | Since: base-4.8.0.0 |
Defined in GHC.RTS.Flags | |
| type Rep TickyFlags # | Since: base-4.15.0.0 |
Defined in GHC.RTS.Flags type Rep TickyFlags = D1 ('MetaData "TickyFlags" "GHC.RTS.Flags" "base" 'False) (C1 ('MetaCons "TickyFlags" 'PrefixI 'True) (S1 ('MetaSel ('Just "showTickyStats") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool) :*: S1 ('MetaSel ('Just "tickyFile") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe FilePath)))) | |
Parameters pertaining to parallelism
Since: base-4.8.0.0
Constructors
| ParFlags | |
Fields
| |
Instances
data IoSubSystem Source #
The I/O SubSystem to use in the program.
Since: base-4.9.0.0
Constructors
| IoPOSIX | Use a POSIX I/O Sub-System |
| IoNative | Use platform native Sub-System. For unix OSes this is the same as IoPOSIX, but on Windows this means use the Windows native APIs for I/O, including IOCP and RIO. |
Instances
getRTSFlags :: IO RTSFlags Source #
getGCFlags :: IO GCFlags Source #
getIoManagerFlag :: IO IoSubSystem Source #
Needed to optimize support for different IO Managers on Windows. See Note [The need for getIoManagerFlag]
getCCFlags :: IO CCFlags Source #
getParFlags :: IO ParFlags Source #