[pypy-dev] The Work Plan Re: STM proposal funding

[Maciej Fijalkowski]

On Sun, Apr 1, 2012 at 11:23 AM, Armin Rigo <arigo at tunes.org> wrote:
> Hi Andrew, hi all,
>
> On Wed, Mar 28, 2012 at 18:23, Andrew Francis <andrewfr_ice at yahoo.com> wrote:
>>>Indeed, and it was around 2007, so I expect the authors to have been
>>>involved in completely different things for quite some time now...
>>>But I could try to contact them anyway.
>>
>> Communications is good :-)
>
> I'm also thinking about writing a short paper collecting things I said
> and think on various blog posts.  A kind of "position paper".  What do
> others think of this idea?

I can help

>
>> My PyPy knowledge is still sketchy but I am changing that.  I do understand
>> the Twisted reactor model
>>  (thanks to my 2008 Pycon Talk) so I could follow discussions in that area.
>> Is this discussed on IRC?
>
> This is not discussed a lot right now.  But it is apparently
> relatively easy to adapt the epoll-based Twisted reactor to use the
> 'transaction' module.  (Again, this module is present in the stm-gc
> branch; look for lib_pypy/transaction.py for the interface, and
> pypy/module/transaction/* for the Python implementation on top of STM
> as exposed by RPython.)  This 'transaction' module is also meant to be
> used directly, for example in this kind of Python code:
>
>    for n in range(...):
>        do_something(n)
>
> If each call to do_something() has "reasonable chances" to be
> independent from other calls, and if the order doesn't matter, then it
> can be rewritten as:
>
>    for n in range(...):
>        transaction.add(do_something, n)
>    transaction.run()
>
> In addition, each transaction can add more transactions that will be
> run after it.  So if you want to play with lib_pypy/stackless.py to
> add calls to 'transaction', feel free :-)  Maybe it will show that a
> slightly different API is required from the 'transaction' module; I
> don't really know so far.
>
>
> A bientôt,
>
> Armin.
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