[Async-sig] set_blocking_signal_threshold equivalent for asyncio?

[Yusuke Tsutsumi]

Great, thank you! I'll try it out, looks promising.

On Fri, Feb 8, 2019 at 5:37 PM Ben Darnell <ben at bendarnell.com> wrote:

> Asyncio's debug mode does this (and a few more things). Call
> `asyncio.get_event_loop().set_debug()` to enable it.
>
> https://docs.python.org/3/library/asyncio-dev.html#debug-mode
>
> -Ben
>
> On Fri, Feb 8, 2019 at 5:10 PM Yusuke Tsutsumi <yusuke at tsutsumi.io> wrote:
>
>> Hi,
>>
>> In tornado, there's a really nice feature called
>> set_blocking_signal_threshold, which sets a signal that fires if a
>> coroutine has been running for too long without returning control back to
>> the main loop:
>>
>>
>> https://www.tornadoweb.org/en/stable/ioloop.html?highlight=signal#tornado.ioloop.IOLoop.set_blocking_signal_threshold
>>
>> In tornado this will then log the traceback of the coroutine in question.
>> This has been a very valuable tool when a developer accidentally introduces
>> code that blocks the event loop for way too long of a time.
>>
>> Is there an equivalent in asyncio? I have a sketch in my head of how to
>> implement that, but wanted to see if it existed somewhere first.
>>
>> Thanks!
>> -Yusuke
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