[commit: nofib] master: Note why all shootout benchmarks couldn't be added (c82455f)

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[commit: nofib] master: Note why all shootout benchmarks couldn't be added (c82455f)

Ian Lynagh-2

Hi Johan,

On Tue, Feb 05, 2013 at 03:19:59PM -0800, Johan Tibell wrote:
>
> + * The k-nucleotide benchmark wasn't included as it segfaults on my
> +   64-bit OS X 10.8.2 machine.

That sounds more serious than a performance regression!

Or is it a bug in the benchmark?


Thanks
Ian



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[commit: nofib] master: Note why all shootout benchmarks couldn't be added (c82455f)

Johan Tibell-2
On Tue, Feb 5, 2013 at 4:23 PM, Ian Lynagh <ian at well-typed.com> wrote:

>
> Hi Johan,
>
> On Tue, Feb 05, 2013 at 03:19:59PM -0800, Johan Tibell wrote:
> >
> > + * The k-nucleotide benchmark wasn't included as it segfaults on my
> > +   64-bit OS X 10.8.2 machine.
>
> That sounds more serious than a performance regression!
>
> Or is it a bug in the benchmark?
>

It might very well be a bug in the benchmark. It does lots of scary pointer
manipulation. I haven't had time to look into it and see if it only happens
on some GHC versions (which could suggest a GHC bug) or everywhere. It
doesn't seem to happen on the 32-bit machine used by the shootout server at
least.
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