Haproxy show info tasks


Unfortunately haproxy documentation is missing some explanation about stats.
show info command provides the following:

Tasks: 300
Run_queue: 5
Idle_pct: 87

I would be glad if someone can provide me some more info.
IIdle_pct is well documented, I just want to confirm my assuption whether the given value indicates the average idle time measured in the last second or something else?

There is no documentation at all for Tasks and Run_queue and have no idea what they mean.