Kanäle (Beispiel)

collector <- newChan 
let m = 10
sequence $ do
    d <- [ 0 .. m - 1 ]
    return $ forkIO $ do
        let p = sum [ d , d + m .. n ]
        writeChan collector p
xs <- sequence $ replicate ( fromIntegral m ) 
               $ readChan collector
print $ sum xs

ghc -smp --make Foo -o Foo; ./Foo +RTS -N2
http://hackage.haskell.org/trac/ghc/wiki/GhcConcurrency
http://pugs.blogs.com/pugs/2006/10/smp_paralleliza.html