[Python-Dev] Re: my plans for subinterpreters (and a per-interpreter GIL)

2021年12月15日 05:13:34 -0800

Hi Eric,
Did you try to take into account the envisioned project for adding a
"complete" GC and removing the GIL?
Regards
Antoine.
On 2021年12月14日 10:12:07 -0700
Eric Snow <[email protected]> wrote:
> Hi all,
> 
> I'm still hoping to land a per-interpreter GIL for 3.11. There is
> still a decent amount of work to be done but little of it will require
> solving any big problems:
> 
> * pull remaining static globals into _PyRuntimeState and PyInterpreterState
> * minor updates to PEP 554
> * finish up the last couple pieces of the PEP 554 implementation
> * maybe publish a companion PEP about per-interpreter GIL
> 
> There are also a few decisions to be made. I'll open a couple of
> other threads to get feedback on those. Here I'd like your thoughts
> on the following:
> 
> Do we need a PEP about per-interpreter GIL?
> 
> I haven't thought there would be much value in such a PEP. There
> doesn't seem to be any decision that needs to be made. At best the
> PEP would be an explanation of the project, where:
> 
> * the objective has gotten a lot of support (and we're working on
> addressing the concerns of the few objectors)
> * most of the required work is worth doing regardless (e.g. improve
> runtime init/fini, eliminate static globals)
> * the performance impact is likely to be a net improvement
> * it is fully backward compatible and the C-API is essentially unaffected
> 
> So the value of a PEP would be in consolidating an explanation of the
> project into a single document. It seems like a poor fit for a PEP.
> 
> (You might wonder, "what about PEP 554?" I purposefully avoided any
> discussion of the GIL in PEP 554. It's purpose is to expose
> subinterpreters to Python code.)
> 
> However, perhaps I'm too close to it all. I'd like your thoughts on the 
> matter.
> 
> Thanks!
> 
> -eric
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