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2026-04-16 - 22:35
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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
Characteristics of the 20 highest latencies:
System rackcslot6.osadl.org (updated Thu Apr 16, 2026 12:46:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
79456299371369,1cyclictest1016288-21kworker/2:007:58:022
79457599346344,1cyclictest797499-21kworker/4:008:05:014
79457599341340,1cyclictest909670-21kworker/4:111:23:014
79454799341336,2cyclictest957663-21systemd-userwor11:39:010
79454799339337,1cyclictest0-21swapper/007:55:010
79454799336334,1cyclictest0-21swapper/011:01:020
79454799335334,1cyclictest768492-21kworker/0:007:23:020
79454799335333,1cyclictest843499-21kworker/0:209:34:020
79454799333332,1cyclictest768492-21kworker/0:007:40:010
79454799333332,1cyclictest0-21swapper/011:20:020
79454799333331,2cyclictest843499-21kworker/0:208:45:010
79454799332330,1cyclictest0-21swapper/011:50:020
79454799331330,1cyclictest843499-21kworker/0:209:15:010
79454799331330,1cyclictest0-21swapper/010:10:020
79454799331329,1cyclictest843499-21kworker/0:209:57:020
79454799331329,1cyclictest0-21swapper/012:00:020
79454799330329,1cyclictest843499-21kworker/0:212:05:020
79454799330329,1cyclictest843499-21kworker/0:210:30:020
79454799330329,1cyclictest768492-21kworker/0:008:01:020
79454799330329,1cyclictest0-21swapper/007:46:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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