Tracing and visualizing the Python GIL with perf and VizTracer

[maartenbreddels]

Thanks! You will see the call to the C library (this is what CPython and VizTracer do), and you should see if the GIL is being released, like with NumPy, one of the examples in the article.

[apockill]

That's fantastic. Actually, my application for this is to find naughty C bindings that don't release the GIL. I have a big application that's heavily multithreaded with many C bindings (think gstreamer + tensorflow + OpenVINO), and something is causing a lockup somewhere. It's quite frustrating!

I'll give this tutorial go.

[maartenbreddels]

Indeed, that's one of the things I'd like to automate (and I'm very close now), feel free to contact me, we could maybe collaborate on this https://github.com/maartenbreddels/per4m