[Haskell-cafe] Google Summer of Code - Lock-free data structures

[Gregory Collins]

A lock-free concurrent queue alone would be worth a summer project IMO.

G

On Mon, Mar 19, 2012 at 3:25 AM, Florian Hartwig <
florian.j.hartwig at gmail.com> wrote:

> On 19 March 2012 00:59, Chris Smith <cdsmith at gmail.com> wrote:
> > On Mar 18, 2012 6:39 PM, "Florian Hartwig" <florian.j.hartwig at gmail.com>
> > wrote:
> >> GSoC stretches over 13 weeks. I would estimate that implementing a data
> >> structure, writing tests, benchmarks, documentation etc. should not take
> >> more
> >> than 3 weeks (it is supposed to be full-time work, after all), which
> means
> >> that I could implement 4 of them in the time available and still have
> some
> >> slack.
> >
> > Don't underestimate the time required for performance tuning, and be
> careful
> > to leave yourself learning time, unless you have already extensively used
> > ThreadScope, read GHC Core, and worked with low-level strictness,
> unpacking,
> > possibly even rewrite rules.  I suspect that the measurable performance
> > benefit from lockless data structures might be tricky to tease out of the
> > noise created by unintentional strictness or unboxing issues.  And we'd
> be
> > much happier with one or two really production quality implementations
> than
> > even six or seven at a student project level.
> >
> > --
> > Chris Smith
>
> Thank you, Hofstadter's law definitely rears its head in many of my
> projects.
> I do have some experience with ThreadScope and strictness issues, but
> you I agree that I'm probably underestimating the time I need to
> learn.
> I also agree that my focus would be on quality rather than quantity. I
> quite like the modularity of this project, because it minimises the
> chance of having a lot of half-finished but useless code at the end of
> summer.
>
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-- 
Gregory Collins <greg at gregorycollins.net>
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