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2026-04-02 - 21:27
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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 02, 2026 12:46:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4047265993800,380cyclictest0-21swapper/409:29:024
4047265993800,380cyclictest0-21swapper/407:45:024
4047265993800,379cyclictest0-21swapper/411:02:024
4047265993800,379cyclictest0-21swapper/410:25:024
4047265993800,379cyclictest0-21swapper/408:55:024
404726599379377,1cyclictest4052333-21kworker/4:011:57:024
404726599379377,1cyclictest4052333-21kworker/4:010:44:024
404726599379377,1cyclictest4052333-21kworker/4:007:25:024
404726599379377,1cyclictest0-21swapper/409:06:024
4047265993790,379cyclictest0-21swapper/411:25:024
4047265993790,379cyclictest0-21swapper/410:08:024
404726599378377,1cyclictest4052333-21kworker/4:011:39:024
404726599378377,1cyclictest4052333-21kworker/4:010:33:024
404726599378377,1cyclictest4052333-21kworker/4:009:24:024
404726599378377,1cyclictest4052333-21kworker/4:009:24:024
404726599378377,1cyclictest4052333-21kworker/4:008:40:024
404726599378377,1cyclictest4052333-21kworker/4:008:35:024
404726599378377,1cyclictest4052333-21kworker/4:008:28:024
404726599378377,1cyclictest4052333-21kworker/4:008:08:024
404726599378377,1cyclictest4052333-21kworker/4:007:50:024
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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