CODEWITHSUNDEEP
pythonpython-3.xpython-asyncio
Jacob Tomlinson
Jacob Tomlinson

Reputation: 3773

How can I measure the length of an asyncio event loop?

I have an application which is calling loop.run_forever() after scheduling some tasks. Those tasks will connect to web services and then schedule new tasks on the loop based on input from those services.

I want to find a way of keeping track of the loop to check whether there are tasks being created which are never completing. Ideally I would measure the number of tasks in the loop periodically and write it to a file, or make it available via an http call.

Upvotes: 2

Views: 1593

Answers (2)

u2gilles
u2gilles

Reputation: 7383

In python 3.10, you can get the number of tasks in the current thread like that :

len(asyncio.all_tasks(asyncio.get_running_loop()))

Upvotes: 3

Alvra
Alvra

Reputation: 425

You can collect all tasks, then count them, compute some other metric of "loop length" or perform inspection.

asyncio.Task.all_tasks(loop=loop)

Upvotes: 3

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