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2026-05-02 - 14:05
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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 May 02, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2115413999280,9cyclictest1213033-21systemd-journal23:15:010
2115417999078,8cyclictest2209484-40mandb00:00:011
2115413998880,5cyclictest2132851-21kworker/u8:1+events_unbound20:20:230
2115413998880,5cyclictest2132851-21kworker/u8:1+events_unbound20:20:230
2115413998676,7cyclictest2168869-21latency_hist21:55:010
2115417998476,6cyclictest2170477-21latency_hist22:00:011
2115417998475,6cyclictest2144473-21latency_hist20:40:011
2115417998373,8cyclictest2184846-21kworker/u8:3+flush-179:022:55:011
2115413998375,5cyclictest2154580-21kworker/u8:1+flush-179:021:35:220
2115413998275,5cyclictest2144983-21kworker/u8:0+flush-179:020:49:560
2115413998072,5cyclictest2183453-21kworker/u8:2+events_unbound22:50:010
2115413998072,5cyclictest2183453-21kworker/u8:2+events_unbound22:50:000
2115413997972,4cyclictest2209427-21kworker/u8:0+events_unbound00:15:010
2115417997770,5cyclictest2172066-21latency_hist22:05:011
2115417997565,7cyclictest2160914-21latency_hist21:30:011
2115413997469,3cyclictest2206317-21kworker/u8:1+flush-179:023:51:070
2115413997466,6cyclictest2142879-21latency_hist20:35:020
2115417997264,6cyclictest2176837-21latency_hist22:20:021
2115413997266,4cyclictest2209427-21kworker/u8:0+events_unbound00:00:010
2115417997059,9cyclictest2196728-21apt-get23:20:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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