[Stackless] multi-core processing?
senn at maya.com
Mon Jun 16 15:36:12 CEST 2008
On Jun 16, 2008, at 9:14 AM, Jeff Senn wrote:
> One quick (perhaps barely relevant) clarification:
> Simon mentions "spawning multiple Python interpreters through the C/
> Python API"
> Even if you use the C API to create multiple interpreters in the same
> processes (but in different threads), you will STILL be at odds with
> the GIL.
Hm... so I was curious and had a look at the interpreter code. I have
slightly take-back that statement. It appears that there might be a
spawn different interpreters in the same process and avoid the GIL.
If you can avoid python calling PyEval_InitThreads(), the GIL will not
be initialized or used. So if you are very careful to use no *python*
code that causes threading to be enabled, you might get away with
non-interlocked python interpreters within the
same process but different threads.
Though I think this would be considered a hack! (i.e. I'm not sure that
it is safe, possible, and supported)
> The GIL is held in a static variable of the interpreter code (Python/
> so you really do need to arrange for separate PROCESSES. (Separate
> static spaces
> for the Python libraries).
> It sounds like you are running separate processes and are good...
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