GHC supports Concurrent Haskell by default, without requiring a
special option or libraries compiled in a certain way. To get access to
the support libraries for Concurrent Haskell, just import
Control.Concurrent
. More information on Concurrent Haskell is provided in the documentation for that module.
The following RTS option(s) affect the behaviour of Concurrent Haskell programs:
-Cs
Sets the context switch interval to s
seconds. A context switch will occur at the next heap block
allocation after the timer expires (a heap block allocation occurs
every 4k of allocation). With -C0
or
-C
, context switches will occur as often as
possible (at every heap block allocation). By default, context
switches occur every 20ms.