Ceph » mgr » Dashboard

POD CPU usage is incorrectly shown¶

When looking at the daemons there is a CPU Usage column represented as a bar chart. This appears to show a 0-100% CPU value - but that doesn't make sense since a daemon can span multiple cores. I think the value itself is coming from cephadm ls, which gets it's data from podman stats - and that shows that the CPU % can be > 100

e.g. from podman stats
075960d54f72,130.51%
0a8934ccd5ed,0.00%
33dac47a5ec9,0.00%
4706397fc32c,2.51%
511ddd65d2da,1.07%
64d89a288eab,8.28%
697fc5ed42d0,0.00%
8b508b5262b3,82.94%
9b751f368a44,75.59%
ca78015d90bf,0.00%
e937fd43aa88,104.66%

Environment¶

• ceph version string: ceph version 18.0.0-2440-g94c24db3 (94c24db3fe85a6772806e7f8794d74d0408cd734) reef (dev)
• Platform (OS/distro/release): RHEL 8.7
• Cluster details (nodes, monitors, OSDs):3 nodes, 3 mons, 12 osds
• Did it happen on a stable environment or after a migration/upgrade?: probably
• Browser used (e.g.: Version 86.0.4240.198 (Official Build) (64-bit)): Firefox 110

How reproducible¶

Steps:

1. Generate a load against a cluster that drives OSDs to more than one core
2. Observe the display

Actual results¶

Expected results¶

I don't think this CPU Usage column can realistically be portrayed as a bar chart

Additional info¶

here