Reza Motamedi created AURORA-1939:
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Summary: Thermos landing (host) page reports incorrect CPU rates
when it is busy
Key: AURORA-1939
URL: https://issues.apache.org/jira/browse/AURORA-1939
Project: Aurora
Issue Type: Bug
Reporter: Reza Motamedi
Priority: Minor
Thermos Observer uses `psutil` to monitor resource consumption of Thermos
Processes. On a busy machine, I have noticed negative CPU values when visiting
the Thermos landing page.
In my test I reproduced this by starting many processes that constantly create
short lived children. This indicates that in time between
`process_collector_psutil` looks up the Process children and the time it
calculates the CPU time the pid of the child is actually reused by another much
younger process, which leads to negative CPU times.
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