PyPy-STM: first "interesting" release
Hi all, PyPy-STM is now reaching a point where we can say it's good enough to be a GIL-less Python. (We don't guarantee there are no more bugs, so please report them :-) The first official STM release: pypy-stm-2.3-r2-linux64 (UPDATE: this is release r2, fixing a systematic segfault at start-up on some systems) This corresponds roughly to PyPy 2.3 (not 2.3.1). It requires 64-bit Linux. More precis
Multicore Programming in PyPy and CPython
Hi all, This is a short "position paper" kind of post about my view (Armin Rigo's) on the future of multicore programming in high-level languages. It is a summary of the keynote presentation at EuroPython. As I learned by talking with people afterwards, I am not a good enough speaker to manage to convey a deeper message in a 20-minutes talk. I will try instead to convey it in a 250-lines post... T
PyPy - Call for donations - Transactional Memory / Automatic Mutual Exclusion in PyPy
Call for donations - Transactional Memory / Automatic Mutual Exclusion in PyPy UPDATE (April 2014): this is the old Call for Donations about Transactional Memory, kept around for historical purposes. A new Call for Donations is available. Introduction In the presence of today's machines with multiple processors, Python progress is lagging behind: on any CPU-constrained program, developers have a d
Transactional Memory (II)
Here is an update about the previous blog post about the Global Interpreter Lock (GIL). In 5 months, the point of view changed quite a bit. Let me remind you that the GIL is the technique used in both CPython and PyPy to safely run multi-threaded programs: it is a global lock that prevents multiple threads from actually running at the same time. The reason to do that is that it would have disastro
We need Software Transactional Memory
Hi all. Here is (an extract of) a short summary paper about my current position on Software Transactional Memory as a general tool in the implementation of Python or Python-like languages. Thanks to people on IRC for discussion on making this blog post better (lucian, Alex Gaynor, rguillebert, timonator, Da_Blitz). For the purpose of the present discussion, we are comparing Java with Python when i
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