wasserman.louis:
>
> There are 4 sets of "rankings" so -
>
>
> http://shootout.alioth.debian.org/u64/program.php?test=threadring&lang=ghc&;
> id=3
>
>
> Yes, but Haskell used to be doing much better specifically on the u64q, which
> was why I was surprised.
Oh, indeed,
http://shootout.alioth.debian.org/u64q/performance.php?test=threadring
Something broke.
Simon Marlow described how best to parallelize this problem extensively
in:
http://www.haskell.org/~simonmar/bib/multicore-ghc-09_abstract.html
So I'd suggest doing what he says.
In particular, use thread pinning to improve locality.
-- Don
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