Try adding +RTS -N at the end of your ./Main command line.
* Alexander Herz <alexander.h...@mytum.de> [2013-11-07 10:40:59+0100] > 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
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