Hello, it looks quite similar, but it is not completely what I need, I rather need something like
inParallel = parMap rwhnf outList = inParallel (map f) listOfLists If I use your construction on the first 2 elements of my list, I see several threads working, but not in the other case. Regards, Dominik On Thu, 2007-10-25 at 11:53 +0200, Alberto Ruiz wrote: > Hello Dominik, > > I have used something like this and it worked very well: > > import Control.Parallel.Strategies > > inParallel = parMap rwhnf id > > [a,b] = inParallel [f x, g y] > > I hope it helps, > > Alberto > > On Thursday 25 October 2007 11:36, Dominik Luecke wrote: > > Hello, > > > > I am trying to use the code > > > > rels list = > > let > > o1 = (map makeCompEntry) $ head $ splitList list > > o2 = (map makeCompEntry) $ head $ tail $ splitList list > > o3 = (map makeCompEntry) $ head $ tail $ tail $ splitList list > > in > > case (head $ tail $ tail $ tail $ splitList list) of > > [] -> o1 `par` o2 `par` o3 `seq` o1 : o2 : o3 : [] > > _ -> > > let o4 = rels (head $ tail $ tail $ tail $ splitList list) > > in > > o1 `par` o2 `par` o3 `par` o4 `seq` > > o1 : o2 : o3 : o4 > > > > to apply some operation on some lists in parallel. The input list "list" > > is quite long (about 10^17) entries, and I split it into chunks of 1000 > > entries each. I am compiling with the options " -O2 --make -smp > > -threaded" and when running the file with "+RTS -N2 -sstderr -RTS", I > > see that only one worker thread is really doing anything. I am using a > > vanilla build of ghc-6.6.1 running on Ubuntu 7.10. I am currently > > wondering about what I am doing wrong. > > > > Regards, > > Dominik -- Dominik Luecke Phone +49-421-218-64265 Dept. of Computer Science Fax +49-421-218-9864265 University of Bremen [EMAIL PROTECTED] P.O.Box 330440, D-28334 Bremen PGP-Key ID 0x2D82571B _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
