tree a463e4ca7f4a2c0cf60b66bf55a8e31ac97f2393
parent 339778cdff67ad3278e47e1b43017fcd9975b6e2
author Tejun Heo <tj@kernel.org> 1683828063 -1000
committer Tejun Heo <tj@kernel.org> 1683828063 -1000

workqueue: Track and monitor per-workqueue CPU time usage

Now that wq_worker_tick() is there, we can easily track the rough CPU time
consumption of each workqueue by charging the whole tick whenever a tick
hits an active workqueue. While not super accurate, it provides reasonable
visibility into the workqueues that consume a lot of CPU cycles.
wq_monitor.py is updated to report the per-workqueue CPU times.

Signed-off-by: Tejun Heo <tj@kernel.org>