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2026-05-22 - 01:36
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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 May 21, 2026 12:46:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1001355993810,380cyclictest0-21swapper/510:40:025
100135599378377,1cyclictest1125519-21kworker/5:211:32:015
100135599377376,1cyclictest1116491-21kworker/5:010:25:025
100135599377376,1cyclictest0-21swapper/512:00:025
100135599377375,1cyclictest1125519-21kworker/5:210:55:025
100135599377375,1cyclictest1125519-21kworker/5:210:55:025
100135599376375,1cyclictest1023204-21kworker/5:208:30:025
100135599376375,1cyclictest0-21swapper/510:30:025
100135599376375,1cyclictest0-21swapper/508:11:025
100135599375374,1cyclictest1125519-21kworker/5:211:25:025
100135599375374,1cyclictest1023204-21kworker/5:209:22:025
100135599375374,1cyclictest1023204-21kworker/5:209:00:025
100135599375374,1cyclictest1023204-21kworker/5:208:27:025
100135599375374,1cyclictest1023204-21kworker/5:208:05:025
100135599375373,1cyclictest1101445-21kworker/5:110:11:025
100135599374373,1cyclictest1125519-21kworker/5:211:20:025
100135599374373,1cyclictest1125519-21kworker/5:211:01:025
100135599374373,1cyclictest0-21swapper/509:45:025
100135599374373,1cyclictest0-21swapper/508:45:025
100135599374373,1cyclictest0-21swapper/507:55:025
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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