linux - How to find out which process is consuming "wait CPU" (i.e. I/O blocked)

Question

With top it's easy to find out how much CPU each job uses. However, I want to hunt down a job that causes a high wait CPU. Is there a way to find out which jobs are blocked on I/O?

question from:https://stackoverflow.com/questions/666783/how-to-find-out-which-process-is-consuming-wait-cpu-i-e-i-o-blocked

Answer 1

iotop and latencytop may be helpful. Neither gives exactly "CPU wait time caused by a process" -- I'm not sure it even makes sense, because the CPU can and does go off to service other processes while waiting for IO -- but these two tools give overviews of (respectively) system I/O traffic and scheduling delays.