wasserman.louis: > How might I go about finding out how many processors are available in a > concurrent GHC program? I have some code I'd like to parallelize, but I > don't want to spawn a separate (even lightweight) thread for each of > thousands of minor tasks. > > Louis Wasserman > [1]wasserman.lo...@gmail.com
You set the number of OS threads with +RTS -N at runtime. This value is accessible from Haskell via: GHC.Conc: -- | the value passed to the @+RTS -N@ flag. This is the number of -- Haskell threads that can run truly simultaneously at any given -- time, and is typically set to the number of physical CPU cores on -- the machine. numCapabilities :: Int -- Don _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe