[Haskell-cafe] Problems with threading?

[Isaac Gouy]

--- On Thu, 6/10/10, Don Stewart <dons at galois.com> wrote:

> From: Don Stewart <dons at galois.com>
> Subject: Re: [Haskell-cafe] Problems with threading?
> To: "Louis Wasserman" <wasserman.louis at gmail.com>
> Cc: igouy2 at yahoo.com, "Haskell Café List" <haskell-cafe at haskell.org>
> Date: Thursday, June 10, 2010, 11:36 AM
> wasserman.louis:
> > 
> >     There are 4 sets of "rankings"
> so -
> > 
> >     http://shootout.alioth.debian.org/u64/program.php?test=threadring〈=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.


-qw -qm ?

How's that going to work out when applied to the other Haskell programs?