Threading: when the GIL matters, and when it doesn't

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Brisbane Python User Group

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Threading: when the GIL matters, and when it doesn't #33

Closed cjrh closed 5 years ago

EpicWink commented 5 years ago

Hi, it's Laurie. I'm happy talk about things GIL.

I know:

why the GIL exists
when/why the GIL is released in use of Python
how it's manipulated in C extensions for Python
ways to make the GIL not affect code
all the ins and outs of threading and multiprocessing standard libraries
how multi-threading and multi-processing works in C (on UNIX)

I only know about CPython: I'd have to research how it's different in other Python implementations. Also, I have little experience in asyncio, so there's more research and tinkering there

cjrh commented 5 years ago

@EpicWink Great! I'll add you in for the meetup on 12 June.

I think a "when to use what and how" for threading & multiprocessing would be great, but by all means if there is something specific you want to say then go for it. I think regarding asyncio it's fine for you to say "I don't have personal experience with this but from my research, here's xyz".

I have a lot of experience with asyncio, so if you like you can run your slides past me before the day and I can give them a scan to see if anything regarding asyncio is accurate?

cjrh commented 5 years ago

I'll make up a title for now, but when you have a better idea just let me know and I'll change the title on the roster.

cjrh commented 5 years ago

@EpicWink just checking in, you still ok to present next week?

EpicWink commented 5 years ago

@cjrh, yeah, no issues

EpicWink commented 5 years ago

@cjrh How do I provide my slides?

As a direct attachment? As PDF? Just a OneDrive link?

cjrh commented 5 years ago

PDF is fine. You can drop them in this issue. Thanks again for the talk!

EpicWink commented 5 years ago

Here it is: threading-gil.pdf

More info:

http://python-notes.curiousefficiency.org/en/latest/python3/multicore_python.html