[Haskell-cafe] Re: Hugsvs GHC (again)was: Re: Somerandomnewbiequestions
k.schupke at imperial.ac.uk
Thu Jan 20 05:22:17 EST 2005
Simon Marlow wrote:
>On 20 January 2005 09:56, Keean Schupke wrote:
>>Why is disk a special case? I have never heard that all processes
>>under linux wait for a disk read...
>You were talking about Haskell threads, not processes! These are quite
But with -threaded GHC is using multiple processes (OS-threads)
to run the Haskell threads. If one OS thread handles IO, and the other
runs the Haskell-thread-scheduler, then Haskell-threads need never
wait for IO - apart form the actual thread doing the IO.
>The reason that disk I/O is different is because select() treats it
>differently, and select() is what GHC's runtime currently uses to
Are you sure? Its not mentioned in the manual...
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