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2026-06-21 - 23:34
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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 Sun Jun 21, 2026 12:46:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
379591399381380,1cyclictest4056104-21kworker/2:112:05:022
379591399379378,1cyclictest0-21swapper/212:10:022
379591399379378,1cyclictest0-21swapper/212:10:022
379591399372371,1cyclictest0-21swapper/212:35:022
379591399372371,1cyclictest0-21swapper/212:29:022
379591399371370,1cyclictest4056104-21kworker/2:111:45:022
379591399370369,1cyclictest0-21swapper/210:55:022
379591399370368,1cyclictest4056104-21kworker/2:109:01:022
379591399369368,1cyclictest4056104-21kworker/2:110:00:022
379591399369368,1cyclictest0-21swapper/212:20:022
379591399369368,1cyclictest0-21swapper/211:51:022
379591399369368,1cyclictest0-21swapper/211:04:022
379591399369368,1cyclictest0-21swapper/207:20:022
379591399368367,1cyclictest4056104-21kworker/2:112:30:022
379591399368367,1cyclictest4056104-21kworker/2:110:15:022
379591399368367,1cyclictest4056104-21kworker/2:109:40:022
379591399368367,1cyclictest4056104-21kworker/2:107:35:022
379591399368367,1cyclictest0-21swapper/211:30:022
379591399368366,2cyclictest4056104-21kworker/2:108:18:022
379591399368366,2cyclictest4056104-21kworker/2:108:13:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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