Copyright	(c) Daniel Taskoff 2020
License	MIT
Maintainer	[email protected]
Stability	experimental
Safe Haskell	Safe
Language	Haskell2010

System.LibCPUID

Contents

Description

Bindings to https://github.com/anrieff/libcpuid.

Currently implemented features:

cpuid >>= \case
 Left err -> error err
 Right CPUID {..} -> do
   mapM_ putStrLn
     [ "Available CPU information"
     , "------------------------------------------"
     , "vendor string: " ++ vendorString
     , "brand string: " ++ brandString
     , "has a time-stamp counter (TSC): " ++  if hasTSC then "yes" else "no"
     , "# physical cores per processor: " ++ show physicalCores
     , "# logical cores per processor: " ++ show logicalCores
     , "# processors: " ++ show (div totalLogicalCores logicalCores)
     ]

Synopsis

cpuid :: IO (Either String CPUID)
isCPUIDPresent :: IO Bool
getTotalLogicalCores :: IO Int
data CPUID = CPUID {
- vendorString :: String
- brandString :: String
- hasTSC :: Bool
- physicalCores :: Int
- logicalCores :: Int
- totalLogicalCores :: Int
}

LibCPUID

cpuid :: IO (Either String CPUID) Source #

Get CPU information and features, or an error message, if the CPU can't be identified by libcpuid.

isCPUIDPresent :: IO Bool Source #

Check if the CPUID instruction is supported.

getTotalLogicalCores :: IO Int Source #

Get the total number of logical cores (even if CPUID is not present). If CPUID is present, the following is true:

getTotalLogicalCores = totalLogicalCores <$> cpuid

Reexports

data CPUID Source #

CPU information and features.

Constructors

CPUID

Fields

vendorString :: String
CPU vendor string, e.g. "GenuineIntel".
brandString :: String
CPU brand string, e.g. "Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz".
hasTSC :: Bool
Is a time-stamp counter available.
physicalCores :: Int
Number of physical cores per processor.
logicalCores :: Int
Number of logical cores per processor.
totalLogicalCores :: Int
Total number of logical cores, which is logicalCores multiplied by the number of processors.

Instances

Storable CPUID Source #
Instance details Defined in System.LibCPUID.CPUID Methods sizeOf :: CPUID -> Int # alignment :: CPUID -> Int # peekElemOff :: Ptr CPUID -> Int -> IO CPUID # pokeElemOff :: Ptr CPUID -> Int -> CPUID -> IO () # peekByteOff :: Ptr b -> Int -> IO CPUID # pokeByteOff :: Ptr b -> Int -> CPUID -> IO () # peek :: Ptr CPUID -> IO CPUID # poke :: Ptr CPUID -> CPUID -> IO () #