Problem solved! Sorry for using the wrong list. Alex On 11/07/2013 10:40 AM, Alexander Herz wrote:
Hi,
I'm new to haskell and I tried to reproduce the perfomance values from the paper "Regular, Shape-polymorphic, Parallel Arrays in Haskell".
I modified the repa-mmult example from the repa-example package to use the mmultP from Data.Array.Repa.Algorithms.Matrix.
Then I compile it with "ghc -threaded -fglasgow-exts -O Main.hs" but running it with two large matrices :
"./Main -random 4096 4096 -random 4096 4096" I can see that only one of my 4 cpus is utilized.
What am I doing wrong?
Note: The unmodified repa-example also does not run in parallel.
Thx, Alex _______________________________________________ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell