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2026-05-14 - 19:24
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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 rackeslot6.osadl.org (updated Thu May 14, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31612049910594,8cyclictest3267320-21latency_hist12:40:021
3161204999993,5cyclictest3228590-21kworker/u8:2+events_unbound10:40:011
3161201999787,7cyclictest1213033-21systemd-journal07:35:000
3161204999180,8cyclictest3211018-21kworker/u8:3+flush-179:009:45:201
3161204999177,12cyclictest3220607-21kworker/u8:2+events_unbound10:30:161
3161204999085,4cyclictest3156363-21kworker/u8:3+flush-179:007:25:251
3161204999081,7cyclictest3237578-21kworker/u8:0+events_unbound11:55:011
3161204998878,7cyclictest3190116-21kworker/u8:0+events_unbound09:05:161
3161201998879,6cyclictest3228518-21kworker/u8:1+flush-179:010:55:240
3161204998781,5cyclictest3237578-21kworker/u8:0+events_unbound12:00:241
3161204998680,4cyclictest3233362-21kworker/u8:2+events_unbound11:05:011
3161204998576,6cyclictest3167736-21kworker/u8:1+events_unbound08:15:191
3161204998576,6cyclictest3167736-21kworker/u8:1+events_unbound08:15:181
3161204998472,9cyclictest3170968-21latency_hist07:40:001
3161204998375,6cyclictest3199337-21kworker/u8:1+events_unbound09:10:291
3161204998275,4cyclictest3167790-21kworker/u8:2+flush-179:007:50:151
3161201998271,8cyclictest3228792-21/usr/sbin/munin10:40:230
3161201998271,8cyclictest3228792-21/usr/sbin/munin10:40:230
3161204998072,6cyclictest3190116-21kworker/u8:0+flush-179:008:45:251
3161204997972,5cyclictest3167736-21kworker/u8:1+events_unbound07:30:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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