Data.Array.Parallel.Unlifted.Distributed.Primitive.Gang

Gang primitives.

Documentation

data Gang

A Gang is a group of threads which execute arbitrary work requests.

Instances

Show Gang

data Workload

Constructors

WorkUnknown

Unknown workload. Just run it in parallel.

WorkCopy Int

Memory bound copy-like workload, of the given number of bytes.

Instances

Eq Workload

Show Workload

seqGang :: Gang -> Gang

A sequential gang has no threads.

forkGang :: Int -> IO Gang

Fork a Gang with the given number of threads (at least 1).

gangSize :: Gang -> Int

O(1). Yield the number of threads in the Gang.

gangIO :: Gang -> String -> Workload -> (Int -> IO ()) -> IO ()

Issue work requests for the Gang and wait until they have been executed. If the gang is already busy then just run the action in the requesting thread.

gangST :: Gang -> String -> Workload -> (Int -> ST s ()) -> ST s ()

Same as gangIO but in the ST monad.