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Tomas-M / iotop

A top utility for IO
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98% CPU use #60

Closed realnc closed 1 year ago

realnc commented 1 year ago

Is it normal that iotop consumes 98% CPU when running? It completely hogs one CPU core.

I'm using version 1.24.

2023-10-05-14-03-00-251980868

bbonev commented 1 year ago

No, it is not normal.

Please provide more info on how to reproduce that.

realnc commented 1 year ago

No, it is not normal.

Please provide more info on how to reproduce that.

I just run iotop (as user.) I get a warning about task_delayacct. When the warning is shown, CPU use is quite normal. When I press ESC to hide the warning, CPU use goes to 98%.

Actually, as I'm writing this, I found out it happens even without the warning. If I instead press any other key to hide the warning, CPU use is normal. If I press ESC in iotop, CPU use skyrockets.

bbonev commented 1 year ago

Thank you for reporting this problem.

The good news is that it is 100% reproducible.

The problem is unrelated to running iotop as user or root. It is also unrelated to the warning window - with or without it, an ESC key makes iotop to busy loop. The problem is also present in v 1.23