Is there a way to find out which function block the tokio schedule

[attila-lin]

The users may misuse some block functions without spawn_blocking and they may cause the schedule to be blocked.

Currently, it is hard to debug.

[hds]

In tokio-console you can see from the poll time which task is blocking (because its busy time keeps going up), but it's not possible to get function level information.

You can use the (unstable) task builder API in tokio to name tasks and thus get a better idea of where the blocking is coming from.

[gftea]

@hds , is the busy, sched, idle are showing accumulative value but not a certain time window?

[hds]

The times shown are the sum over the entire lifetime of the task.

[gftea]

Thanks @hds , is there any way to reset the measure at live time?

[hds]

Not currently. No. If there is a specific action you want to measure separately, you could work around this by spawning that action as a new task.

If you have a specific use case in mind that you think would be useful for others too, feel free to open an Issue describing it.