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2026-04-18 - 14:23
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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 Sat Apr 18, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
98915899108102,4cyclictest990684-21kworker/u8:2+events_unbound20:15:230
98915899104100,3cyclictest1051706-21kworker/u8:2+events_unbound22:35:240
989158999990,6cyclictest1006575-21latency_hist20:05:020
989158999690,4cyclictest1063375-21kworker/u8:2+events_unbound23:20:230
989158999186,4cyclictest990684-21kworker/u8:2+events_unbound19:55:230
989158999085,4cyclictest990684-21kworker/u8:2+events_unbound19:30:230
989158999085,4cyclictest1068133-21kworker/u8:0+events_unbound23:40:240
989158998780,5cyclictest1014788-21latency_hist20:30:020
989158998778,8cyclictest986982-21kworker/u8:1+events_unbound19:15:230
989161998476,6cyclictest1094161-21latency_hist00:35:011
989161998170,8cyclictest1213033-21systemd-journal23:05:001
989158998174,5cyclictest1081094-21latency_hist23:55:000
989158998075,4cyclictest1037113-21kworker/u8:2+events_unbound21:50:250
989158998066,11cyclictest1082712-40mandb00:00:010
989161997960,17cyclictest0-21swapper/120:02:581
989158997969,4cyclictest990684-21kworker/u8:2+events_unbound20:10:240
989158997873,4cyclictest1033938-21kworker/u8:3+events_unbound21:45:230
989158997868,4cyclictest1033938-21kworker/u8:3+events_unbound22:25:240
989158997868,3cyclictest1027529-21kworker/u8:2+events_unbound21:22:230
989158997864,11cyclictest1213033-21systemd-journal20:35:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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