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2025-10-19 - 00:30
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack1slot8.osadl.org (updated Sat Oct 18, 2025 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
274192977957,13sleep10-21swapper/107:05:381
2788899966820,49cyclictest0-21swapper/107:10:091
2788799870726,53cyclictest0-21swapper/007:10:080
26196274824,716sleep00-21swapper/007:05:040
2788799456369,72cyclictest0-21swapper/008:30:300
27888994384,12cyclictest0-21swapper/108:30:301
278889911519,48cyclictest0-21swapper/111:29:591
27887991048,89cyclictest18874-21ssh10:24:580
2168991030,4rtkit-daemon2167-21rtkit-daemon10:13:271
2168991000,4rtkit-daemon2167-21rtkit-daemon12:17:091
216899990,3rtkit-daemon2167-21rtkit-daemon09:39:411
216899980,4rtkit-daemon2167-21rtkit-daemon11:12:391
216899980,4rtkit-daemon2167-21rtkit-daemon09:51:111
216899980,4rtkit-daemon2167-21rtkit-daemon09:10:211
216899970,4rtkit-daemon2167-21rtkit-daemon12:27:251
216899970,4rtkit-daemon2167-21rtkit-daemon10:27:031
216899970,4rtkit-daemon2167-21rtkit-daemon09:04:561
216899960,4rtkit-daemon2167-21rtkit-daemon10:21:571
216899960,3rtkit-daemon2167-21rtkit-daemon08:42:061
216899950,4rtkit-daemon2167-21rtkit-daemon12:09:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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