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2025-09-18 - 11:09
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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 Sep 18, 2025 00:46:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
56259799382381,1cyclictest579040-21kworker/3:220:02:033
56259799382381,1cyclictest0-21swapper/319:32:023
56259799382380,1cyclictest702601-21kworker/3:122:24:033
562597993820,381cyclictest0-21swapper/323:02:033
562597993820,381cyclictest0-21swapper/322:37:033
562597993820,2cyclictest0-21swapper/321:58:023
56259799381380,1cyclictest0-21swapper/322:58:023
56259799381379,1cyclictest0-21swapper/322:40:033
56257399381379,1cyclictest835616-21kworker/0:123:06:030
56257399381378,2cyclictest835616-21kworker/0:123:02:030
56261499380379,1cyclictest857748-21kworker/5:120:14:025
562614993800,379cyclictest0-21swapper/523:14:025
56259799380378,1cyclictest0-21swapper/321:28:033
562597993800,380cyclictest0-21swapper/321:42:033
562597993800,379cyclictest0-21swapper/321:51:033
562573993800,379cyclictest0-21swapper/021:27:030
562573993800,379cyclictest0-21swapper/020:47:030
562573993800,379cyclictest0-21swapper/020:47:030
562573993800,379cyclictest0-21swapper/000:34:030
562573993800,1cyclictest0-21swapper/020:09:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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