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2026-05-17 - 22:51
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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 Sun May 17, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30735089910195,4cyclictest3158787-21kworker/u8:2+events_unbound12:05:001
3073506999589,4cyclictest3141639-21latency_hist10:40:010
3073508999488,5cyclictest3081342-21kworker/u8:1+events_unbound07:55:241
3073508999485,6cyclictest3167355-21kworker/u8:0+flush-179:012:15:191
3073508999485,5cyclictest3125243-21kworker/u8:3+events_unbound10:40:241
3073508999481,10cyclictest3122058-21kworker/u8:1+flush-179:010:00:011
3073508999178,10cyclictest3138191-21latency_hist10:30:001
3073506999182,7cyclictest3107155-21latency_hist08:55:010
3073508999083,4cyclictest3125243-21kworker/u8:3+events_unbound11:00:231
3073508998780,5cyclictest3155947-21kworker/u8:1+events_unbound11:35:221
3073506998777,6cyclictest3125243-21kworker/u8:3+flush-179:009:55:260
3073506998575,7cyclictest3099206-21latency_hist08:30:010
3073508998377,4cyclictest3130221-21kworker/u8:2+flush-179:010:15:251
3073506998374,7cyclictest3130237-21latency_hist10:05:010
3073508998275,5cyclictest3146438-21kworker/u8:0+flush-179:011:15:241
3073508998271,8cyclictest3158787-21kworker/u8:2+flush-179:011:45:151
3073506998272,7cyclictest3113783-21latency_hist09:15:010
3073506998271,7cyclictest3111938-21latency_hist09:10:010
3073508998173,6cyclictest3101334-21diskstats08:35:141
3073508998172,6cyclictest3081342-21kworker/u8:1+flush-179:007:50:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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