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2026-06-18 - 15:35
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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 10 highest latencies:
System rackeslot6.osadl.org (updated Thu Jun 18, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
238822099127119,6cyclictest1213033-21systemd-journal10:50:011
238822099126113,10cyclictest2391283-21apt-get07:20:031
238822099122117,4cyclictest2468150-21kworker/u8:1+events_unbound11:35:011
238822099117112,4cyclictest2487786-21kworker/u8:2+flush-179:012:15:011
238822099112106,4cyclictest2448349-21kworker/u8:3+flush-179:010:20:001
238822099111105,5cyclictest2440343-21kworker/u8:1+flush-179:010:00:011
238822099110104,4cyclictest2448349-21kworker/u8:3+flush-179:010:25:021
238822099109100,6cyclictest2492808-21kworker/u8:0+events_unbound12:30:141
23882169910898,6cyclictest2486206-21latency_hist12:10:000
23882209910699,5cyclictest2407726-21kworker/u8:2+flush-179:008:09:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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