bf3: > Donald: > >Yeah, there's some known low level issues in the code generator > >regarding heap and stack checks inside loops, and the use of registers > >on x86. > > > >But note this updated paper, > > http://www.cse.unsw.edu.au/~chak/papers/CLPKM07.html > > > >Add another core to your machine and it is no longer 4x slower :) > >Add 15 more cores and its really no longer 4x slower : > > > Maybe this is yet another newbie stupid question, but do you mean that > GHC does automatic multi-threading? (Haskell seems very suitable for > that) Otherwise adding an extra core does not really help does it? >
No, though that would be nice! You do have to program in a parallel manner, either by using forkIO, Control.Parallel, or parallel arrays. When you do, you have the option of such code scaling up to more cores relatively easily. My advice: starting writing threaded code now, with *lots* of threads, so your program will have the ability to start using +RTS -N16 when you get a new machine :) -- Don _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
