sebastian.sylvan:
>    On Wed, Apr 9, 2008 at 10:58 PM, Justin Bailey <[1]jgbailey@gmail.com>

>    wrote:
>
>      On Wed, Apr 9, 2008 at 2:25 PM, Sebastian Sylvan

>      <[2]sebastian.sylvan@gmail.com> wrote:
>      > Nope!
>      >
>      > This is GHC 6.8.2 btw, downloaded the binary from the web site, so
>      it's
>      > nothing strange.
>
>      On my hyper-threaded CPU, your original code works fine. With -N2, I

>      see 100% CPU. With N1, only 50%. I am also using GHC [3]6.8.2.

>      Justin
>
>    Hmm, that's curious. I compile with "ghc --make -threaded partest.hs -o
>    par.exe", and then run it with "par.exe +RTS -N2 -RTS". Am I making some
>    silly configuration error?
>    Are you running this on windows?
>

I think its always worth using -O or -O2 too, for what its worth.