[Python-Dev] STM and python

Matt Joiner anacrolix at gmail.com
Thu Dec 1 07:06:43 CET 2011

I saw this, I believe it just exposes an STM primitive to user code.
It doesn't make use of STM for Python internals.

Explicit STM doesn't seem particularly useful for a language that
doesn't expose raw memory in its normal usage.

On Thu, Dec 1, 2011 at 4:41 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:
> On Thu, Dec 1, 2011 at 10:58 AM, Gregory P. Smith <greg at krypto.org> wrote:
>> Azul has been using hardware transactional memory on their custom CPUs (and
>> likely STM in their current x86 virtual machine based products) to great
>> effect for their massively parallel Java VM (700+ cpu cores and gobs of ram)
>> for over 4 years.  I'll leave it to the reader to do the relevant searching
>> to read more on that.
>> My point is: This is up to any given Python VM implementation to take
>> advantage of or not as it sees fit.  Shoe horning it into an existing VM may
>> not make much sense but anyone is welcome to try.
> There's a patch somewhere on the tracker to add an "Armin Rigo hook"
> to the CPython eval loop so he can play with STM in Python as well (at
> least, I think it was STM he wanted it for - it might have been
> something else).
> Cheers,
> Nick.
> --
> Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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