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2026-05-14 - 22:49
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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 14, 2026 12:46:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
254588399378376,1cyclictest2860903-21kworker/5:207:15:025
254587599377375,1cyclictest2594829-21kworker/4:209:01:024
254587599374372,1cyclictest2654984-21kworker/4:011:15:024
254587599374372,1cyclictest2654984-21kworker/4:011:15:024
254587599373371,1cyclictest2594829-21kworker/4:208:49:024
254588399372371,1cyclictest2860903-21kworker/5:208:21:025
254588399372371,1cyclictest2860903-21kworker/5:208:21:025
254587599371369,2cyclictest2654984-21kworker/4:011:25:024
254588399370369,1cyclictest2860903-21kworker/5:209:19:025
254588399370369,1cyclictest2860903-21kworker/5:208:27:025
254588399370367,2cyclictest2633930-21kworker/5:109:41:025
254587599370369,1cyclictest2594829-21kworker/4:209:21:024
254587599370369,1cyclictest0-21swapper/407:35:024
254587599370368,1cyclictest0-21swapper/412:21:024
254588399369368,1cyclictest2685058-21kworker/5:211:29:025
254588399369368,1cyclictest0-21swapper/509:25:025
254587599369367,1cyclictest42-21ksoftirqd/407:14:024
254587599369367,1cyclictest2510869-21kworker/4:108:20:034
254587599369367,1cyclictest2510869-21kworker/4:108:20:024
254587599369366,2cyclictest2510869-21kworker/4:107:23:024
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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