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API for number of active tokio tasks? #5400

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coder3101 opened this issue Jan 26, 2023 · 3 comments · Fixed by #5628
Closed

API for number of active tokio tasks? #5400

coder3101 opened this issue Jan 26, 2023 · 3 comments · Fixed by #5628
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A-tokio Area: The main tokio crate C-feature-request Category: A feature request. M-metrics Module: tokio/runtime/metrics

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@coder3101
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coder3101 commented Jan 26, 2023 •
edited

Is your feature request related to a problem? Please describe.
I would like to get the count of active running tokio tasks. In python, I can use len(asyncio.all_tasks()) which returns the unfinished tasks for the current running loop.

Describe the solution you'd like
A simple associated function such as tokio::active_tasks() which could return the number or as with asyncio.all_tasks() return a set of not yet finished Task objects run by the loop.

Describe alternatives you've considered
There are debugging tools such as tokio-rs/console or tracing which helps achieve the same but they are mainly suited for debugging purpose. Is there a way to get those information in production?

Additional context
Originally asked as question on stackoverflow
@coder3101 coder3101 added A-tokio Area: The main tokio crate C-feature-request Category: A feature request. labels Jan 26, 2023
@Darksonn Darksonn added the M-metrics Module: tokio/runtime/metrics label Jan 27, 2023
@Darksonn
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Adding this to tokio::runtime::RuntimeMetrics sounds like a good idea.

matildasmeds added a commit to matildasmeds/tokio that referenced this issue Apr 16, 2023
@matildasmeds
runtime: Add a metric that counts currently active tasks
8f80feb 
Adds a new metric for the number of active tasks  for the Runtime. We count
the elements on the OwnedTasks LinkedList, and access that through RuntimeMetrics.

Closes: tokio-rs#5400
@matildasmeds matildasmeds mentioned this issue Apr 16, 2023
Merged
matildasmeds added a commit to matildasmeds/tokio that referenced this issue Apr 16, 2023
@matildasmeds
runtime: Add a metric that counts currently active tasks
c7d3512 
Adds a new metric for the number of active tasks  for the Runtime. We count
the elements on the OwnedTasks LinkedList, and access that through RuntimeMetrics.

Closes: tokio-rs#5400
@coder3101
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When and which version of tokio will include this newly added metric?

@Darksonn
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It will be available in 1.29, which will be released about one month from now.

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A-tokio Area: The main tokio crate C-feature-request Category: A feature request. M-metrics Module: tokio/runtime/metrics
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runtime: Add a metric that counts currently active tasks matildasmeds/tokio
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@Darksonn @coder3101