[Haskell-cafe] Memory usage outside of the Haskell heap

Tomasz Zielonka tomasz.zielonka at gmail.com
Sat Nov 5 10:13:04 EST 2005

On Sat, Nov 05, 2005 at 12:18:04PM +0000, Joel Reymont wrote:
> How can I profile memory usage outside of the Haskell heap? I'm using  
> FastStrings for everything and some folks on #haskell suspect it  
> might be causing my problems.
> hGet :: Handle -> Int -> IO FastString
> hGet _ 0 = return empty
> hGet h i = do fp <- mallocForeignPtr i
>               l  <- withForeignPtr fp $ \p-> hGetBuf h p i
>               return $ PS fp 0 l

I just checked that the memory allocated with
Foreign.ForeignPtr.mallocForeignPtrBytes is included in the GC stats.
Does the FastString library use its own implementation of mallocForeignPtr?

Best regards

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