mirror of
https://github.com/composewell/streamly.git
synced 2024-09-11 11:37:22 +03:00
Use unsafe peek and poke for better performance
This commit is contained in:
parent
fa8b0ab0be
commit
06ae33ed93
@ -1,5 +1,11 @@
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{-# LANGUAGE TemplateHaskell #-}
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#undef FUSION_CHECK
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#ifdef FUSION_CHECK
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{-# OPTIONS_GHC -ddump-simpl -ddump-to-file -dsuppress-all #-}
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#endif
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-- |
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-- Module : Streamly.Benchmark.Data.Unbox
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-- Copyright : (c) 2023 Composewell
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@ -20,7 +26,9 @@ import GHC.Generics (Generic)
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import System.Random (randomRIO)
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import Streamly.Internal.Data.Unbox
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#ifdef USE_TH
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import Streamly.Internal.Data.Unbox.TH
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#endif
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import Gauge
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import Streamly.Benchmark.Common
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@ -29,30 +37,41 @@ import Streamly.Benchmark.Common
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-- Types
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-------------------------------------------------------------------------------
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data CustomDT1 a b
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data CustomDT1
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= CDT1C1
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| CDT1C2 a
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| CDT1C3 a b
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| CDT1C2 Int
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| CDT1C3 Int Bool
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deriving (Generic, Show, Eq)
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type CustomDT1_ = CustomDT1 Int Bool
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instance (Unbox a, Unbox b) => Unbox (CustomDT1 a b)
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data CustomDT2 a b
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= CDT2C1
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| CDT2C2 a
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| CDT2C3 a b
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deriving (Show, Eq)
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type CustomDT2_ = CustomDT2 Int Bool
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$(deriveUnbox ''CustomDT2)
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#ifndef USE_TH
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instance Unbox CustomDT1
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#else
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$(deriveUnbox ''CustomDT1)
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#endif
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-------------------------------------------------------------------------------
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-- Helpers
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-------------------------------------------------------------------------------
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serializeDeserializeTimes :: forall a. (Eq a, Unbox a) => a -> Int -> IO ()
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serializeDeserializeTimes val times = do
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{-# INLINE pokeTimes #-}
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pokeTimes :: forall a. Unbox a => a -> Int -> IO ()
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pokeTimes val times = do
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arr <- newBytes (sizeOf (Proxy :: Proxy a))
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replicateM_ times $ do
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pokeByteIndex 0 arr val
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{-# INLINE peekTimes #-}
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peekTimes :: forall a. Unbox a => a -> Int -> IO ()
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peekTimes val times = do
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arr <- newBytes (sizeOf (Proxy :: Proxy a))
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pokeByteIndex 0 arr val
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replicateM_ times $ do
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(_ :: a) <- peekByteIndex 0 arr
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return ()
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{-# INLINE roundtrip #-}
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roundtrip :: forall a. (Eq a, Unbox a) => a -> Int -> IO ()
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roundtrip val times = do
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arr <- newBytes (sizeOf (Proxy :: Proxy a))
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replicateM_ times $ do
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pokeByteIndex 0 arr val
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@ -68,30 +87,30 @@ benchSink name times f = bench name (nfIO (randomRIO (times, times) >>= f))
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allBenchmarks :: Int -> [Benchmark]
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allBenchmarks times =
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[ benchSink
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"serializeDeserializeTimes CDT1C1 (Generic)"
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times
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(serializeDeserializeTimes (CDT1C1 :: CustomDT1_))
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, benchSink
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"serializeDeserializeTimes CDT2C1 (TH)"
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times
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(serializeDeserializeTimes (CDT2C1 :: CustomDT2_))
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, benchSink
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"serializeDeserializeTimes CDT1C2 (Generic)"
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times
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(serializeDeserializeTimes ((CDT1C2 (5 :: Int)) :: CustomDT1_))
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, benchSink
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"serializeDeserializeTimes CDT2C2 (TH)"
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times
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(serializeDeserializeTimes ((CDT2C2 (5 :: Int)) :: CustomDT2_))
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, benchSink
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"serializeDeserializeTimes CDT1C3 (Generic)"
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times
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(serializeDeserializeTimes ((CDT1C3 (5 :: Int) True) :: CustomDT1_))
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, benchSink
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"serializeDeserializeTimes CDT2C3 (TH)"
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times
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(serializeDeserializeTimes ((CDT2C3 (5 :: Int) True) :: CustomDT2_))
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[ bgroup "poke"
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[ benchSink "C1" times
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(pokeTimes (CDT1C1 :: CustomDT1))
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, benchSink "C2" times
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(pokeTimes ((CDT1C2 (5 :: Int)) :: CustomDT1))
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, benchSink "C3" times
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(pokeTimes ((CDT1C3 (5 :: Int) True) :: CustomDT1))
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]
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, bgroup "peek"
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[ benchSink "C1" times
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(peekTimes (CDT1C1 :: CustomDT1))
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, benchSink "C2" times
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(peekTimes ((CDT1C2 (5 :: Int)) :: CustomDT1))
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, benchSink "C3" times
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(peekTimes ((CDT1C3 (5 :: Int) True) :: CustomDT1))
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]
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, bgroup "roundtrip"
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[ benchSink "C1" times
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(roundtrip (CDT1C1 :: CustomDT1))
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, benchSink "C2" times
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(roundtrip ((CDT1C2 (5 :: Int)) :: CustomDT1))
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, benchSink "C3" times
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(roundtrip ((CDT1C3 (5 :: Int) True) :: CustomDT1))
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]
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]
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-------------------------------------------------------------------------------
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@ -99,4 +118,15 @@ allBenchmarks times =
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-------------------------------------------------------------------------------
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main :: IO ()
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main = runWithCLIOpts defaultStreamSize allBenchmarks
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main = do
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#ifndef FUSION_CHECK
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runWithCLIOpts defaultStreamSize allBenchmarks
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#else
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-- Enable FUSION_CHECK macro at the beginning of the file
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-- Enable one benchmark below, and run the benchmark
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-- Check the .dump-simpl output
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let value = 100000
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-- peekTimes ((CDT1C2 (5 :: Int)) :: CustomDT1) value
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roundtrip ((CDT1C2 (5 :: Int)) :: CustomDT1) value
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return ()
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#endif
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@ -362,6 +362,13 @@ benchmark Data.Unbox
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hs-source-dirs: .
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main-is: Streamly/Benchmark/Data/Unbox.hs
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benchmark Data.Unbox.Derive.TH
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import: bench-options
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type: exitcode-stdio-1.0
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hs-source-dirs: .
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cpp-options: -DUSE_TH
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main-is: Streamly/Benchmark/Data/Unbox.hs
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benchmark Data.Unfold
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import: bench-options
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type: exitcode-stdio-1.0
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@ -100,6 +100,7 @@ touch :: MutableByteArray -> IO ()
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touch (MutableByteArray contents) =
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IO $ \s -> case touch# contents s of s' -> (# s', () #)
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{-
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-- | Return the size of the array in bytes.
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{-# INLINE sizeOfMutableByteArray #-}
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sizeOfMutableByteArray :: MutableByteArray -> IO Int
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@ -107,6 +108,7 @@ sizeOfMutableByteArray (MutableByteArray arr) =
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IO $ \s ->
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case getSizeofMutableByteArray# arr s of
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(# s1, i #) -> (# s1, I# i #)
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-}
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--------------------------------------------------------------------------------
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-- Creation
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@ -282,7 +284,9 @@ unpin arr@(MutableByteArray marr#) =
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-- The 'peekByteIndex' read operation converts a Haskell type from its unboxed
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-- representation stored in a mutable byte array, while the 'pokeByteIndex'
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-- write operation serializes a Haskell data type to its byte representation in
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-- the mutable byte array.
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-- the mutable byte array. These operations do not check the bounds of the
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-- array, the user of the type class is expected to check the bounds before
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-- peeking or poking.
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--
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-- Instances can be derived via Generics or Template Haskell. Note that the
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-- data type must be non-recursive.
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@ -326,10 +330,12 @@ unpin arr@(MutableByteArray marr#) =
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-- instance Unbox Object where
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-- sizeOf _ = 16
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-- peekByteIndex i arr = do
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-- -- Check the array bounds
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-- x0 <- peekByteIndex i arr
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-- x1 <- peekByteIndex (i + 8) arr
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-- return $ Object x0 x1
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-- pokeByteIndex i arr (Object x0 x1) = do
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-- -- Check the array bounds
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-- pokeByteIndex i arr x0
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-- pokeByteIndex (i + 8) arr x1
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-- :}
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@ -587,6 +593,12 @@ readUnsafe = Peeker (Builder step)
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step :: forall a. Unbox a => BoundedPtr -> IO (BoundedPtr, a)
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step (BoundedPtr arr pos end) = do
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let next = pos + sizeOf (Proxy :: Proxy a)
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#ifdef DEBUG
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when (next > end)
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$ error $ "readUnsafe: reading beyond limit. next = "
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++ show next
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++ " end = " ++ show end
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#endif
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r <- peekByteIndex pos arr
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return (BoundedPtr arr next end, r)
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@ -600,7 +612,10 @@ read = Peeker (Builder step)
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step :: forall a. Unbox a => BoundedPtr -> IO (BoundedPtr, a)
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step (BoundedPtr arr pos end) = do
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let next = pos + sizeOf (Proxy :: Proxy a)
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when (next > end) $ error "peekObject reading beyond limit"
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when (next > end)
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$ error $ "read: reading beyond limit. next = "
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++ show next
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++ " end = " ++ show end
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r <- peekByteIndex pos arr
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return (BoundedPtr arr next end, r)
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@ -614,10 +629,12 @@ skipByte = Peeker (Builder step)
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step :: BoundedPtr -> IO (BoundedPtr, ())
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step (BoundedPtr arr pos end) = do
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let next = pos + 1
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#ifdef DEBUG
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when (next > end)
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$ error $ "skipByte: reading beyond limit. next = "
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++ show next
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++ " end = " ++ show end
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#endif
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return (BoundedPtr arr next end, ())
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{-# INLINE runPeeker #-}
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@ -638,6 +655,12 @@ runPeeker (Peeker (Builder f)) ptr = fmap snd (f ptr)
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pokeBoundedPtrUnsafe :: forall a. Unbox a => a -> BoundedPtr -> IO BoundedPtr
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pokeBoundedPtrUnsafe a (BoundedPtr arr pos end) = do
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let next = pos + sizeOf (Proxy :: Proxy a)
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#ifdef DEBUG
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when (next > end)
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$ error $ "pokeBoundedPtrUnsafe: reading beyond limit. next = "
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++ show next
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++ " end = " ++ show end
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#endif
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pokeByteIndex pos arr a
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return (BoundedPtr arr next end)
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@ -669,7 +692,10 @@ type family ArityCheck (b :: Bool) :: Constraint where
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-- Type constraint to restrict the sum type arity so that the constructor tag
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-- can fit in a single byte.
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type MaxArity256 n = ArityCheck (n <=? 255)
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-- Note that Arity starts from 1 and constructor tags start from 0. So if max
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-- arity is 256 then max constructor tag would be 255.
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-- XXX Use variable length encoding to support more than 256 constructors.
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type MaxArity256 n = ArityCheck (n <=? 256)
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--------------------------------------------------------------------------------
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-- Generic Deriving of Unbox instance
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@ -735,8 +761,8 @@ instance (MaxArity256 (SumArity (f :+: g)), SizeOfRepSum f, SizeOfRepSum g) =>
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-- The size of a sum type is the max of any of the constructor size.
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-- sizeOfRepSum type class operation is used here instead of sizeOfRep so
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-- that we add the constructor index byte only for the first time and avoid
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-- including it for the subsequent sum constructors.
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-- that we account the constructor index byte only for the first time and
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-- avoid including it for the subsequent sum constructors.
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{-# INLINE sizeOfRep #-}
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sizeOfRep _ =
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-- One byte for the constructor id and then the constructor value.
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@ -753,6 +779,12 @@ instance (MaxArity256 (SumArity (f :+: g)), SizeOfRepSum f, SizeOfRepSum g) =>
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-- elements to make the size as 1. Or we can disallow arrays with elements
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-- having size 0.
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--
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-- Some examples:
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--
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-- data B = B -- one byte
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-- data A = A B -- one byte
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-- data X = X1 | X2 -- one byte (constructor tag only)
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--
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{-# INLINE genericSizeOf #-}
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genericSizeOf :: forall a. (SizeOfRep (Rep a)) => Proxy a -> Int
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genericSizeOf _ =
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@ -772,7 +804,7 @@ instance PokeRep f => PokeRep (M1 i c f) where
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instance Unbox a => PokeRep (K1 i a) where
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{-# INLINE pokeRep #-}
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pokeRep a = pokeBoundedPtr (unK1 a)
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pokeRep a = pokeBoundedPtrUnsafe (unK1 a)
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instance PokeRep V1 where
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{-# INLINE pokeRep #-}
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@ -795,8 +827,8 @@ class KnownNat n => PokeRepSum (n :: Nat) (f :: Type -> Type) where
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instance (KnownNat n, PokeRep a) => PokeRepSum n (C1 c a) where
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{-# INLINE pokeRepSum #-}
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pokeRepSum _ x ptr = do
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pokeBoundedPtr (fromInteger (natVal (Proxy :: Proxy n)) :: Word8) ptr
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>>= pokeRep x
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let tag = fromInteger (natVal (Proxy :: Proxy n)) :: Word8
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pokeBoundedPtrUnsafe tag ptr >>= pokeRep x
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instance (PokeRepSum n f, PokeRepSum (n + SumArity f) g)
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=> PokeRepSum n (f :+: g) where
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@ -827,14 +859,20 @@ genericPokeByteIndex :: (Generic a, PokeRep (Rep a)) =>
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MutableByteArray -> Int -> a -> IO ()
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genericPokeByteIndex arr index x = do
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-- XXX Should we use unsafe poke?
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#ifdef DEBUG
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end <- sizeOfMutableByteArray arr
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genericPokeObj x (BoundedPtr arr index end)
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#else
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genericPokeObj x (BoundedPtr arr index undefined)
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#endif
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--------------------------------------------------------------------------------
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-- Generic peek
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--------------------------------------------------------------------------------
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class PeekRep (f :: Type -> Type) where
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-- Like pokeRep, we can use the following signature instead of using Peeker
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-- peekRep :: BoundedPtr -> IO (BoundedPtr, f a)
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peekRep :: Peeker (f x)
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instance PeekRep f => PeekRep (M1 i c f) where
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@ -843,7 +881,7 @@ instance PeekRep f => PeekRep (M1 i c f) where
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instance Unbox a => PeekRep (K1 i a) where
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{-# INLINE peekRep #-}
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peekRep = fmap K1 read
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peekRep = fmap K1 readUnsafe
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instance PeekRep V1 where
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{-# INLINE peekRep #-}
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@ -865,6 +903,11 @@ class KnownNat n => PeekRepSum (n :: Nat) (f :: Type -> Type) where
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instance (KnownNat n, PeekRep a) => PeekRepSum n (C1 c a) where
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{-# INLINE peekRepSum #-}
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peekRepSum _ _ = peekRep
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{-
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-- These error checks are expensive, to avoid these
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-- we validate the max value of the tag in peekRep.
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-- XXX Add tests to cover all cases
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peekRepSum _ tag
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| tag == curTag = peekRep
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| tag > curTag =
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@ -876,6 +919,7 @@ instance (KnownNat n, PeekRep a) => PeekRepSum n (C1 c a) where
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where
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curTag = fromInteger (natVal (Proxy :: Proxy n))
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-}
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instance (PeekRepSum n f, PeekRepSum (n + SumArity f) g)
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=> PeekRepSum n (f :+: g) where
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@ -892,12 +936,21 @@ instance (PeekRepSum n f, PeekRepSum (n + SumArity f) g)
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-------------------------------------------------------------------------------
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instance (MaxArity256 (SumArity (f :+: g)), PeekRepSum 0 (f :+: g))
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instance ( MaxArity256 (SumArity (f :+: g))
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, KnownNat (SumArity (f :+: g))
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, PeekRepSum 0 (f :+: g))
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=> PeekRep (f :+: g) where
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{-# INLINE peekRep #-}
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peekRep = do
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tag <- read
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peekRepSum (Proxy :: Proxy 0) tag
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tag :: Word8 <- readUnsafe
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-- XXX test with 256 and more constructors
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let arity :: Int =
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fromInteger (natVal (Proxy :: Proxy (SumArity (f :+: g))))
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when (fromIntegral tag >= arity)
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$ error $ "peek: Tag " ++ show tag
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++ " is greater than the max tag " ++ show (arity - 1)
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++ " for the data type"
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peekRepSum (Proxy :: Proxy 0) tag -- DataKinds
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{-# INLINE genericPeeker #-}
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genericPeeker :: (Generic a, PeekRep (Rep a)) => Peeker a
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@ -912,5 +965,9 @@ genericPeekByteIndex :: (Generic a, PeekRep (Rep a)) =>
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MutableByteArray -> Int -> IO a
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genericPeekByteIndex arr index = do
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-- XXX Should we use unsafe peek?
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#ifdef DEBUG
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end <- sizeOfMutableByteArray arr
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genericPeekBoundedPtr (BoundedPtr arr index end)
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#else
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genericPeekBoundedPtr (BoundedPtr arr index undefined)
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#endif
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@ -187,7 +187,8 @@ targets =
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, ("Data.Fold.Window", [ "parser_grp", "infinite_grp" ])
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, ("Data.Parser", [ "parser_grp", "infinite_grp" ])
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, ("Data.Unbox", ["noBench"])
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, ("Data.Unbox", [])
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, ("Data.Unbox.Derive.TH", [])
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, ("Data.Unfold", ["infinite_grp"])
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, ("FileSystem.Handle", [])
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, ("Unicode.Stream", [])
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