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2026-06-20 - 05:27
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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 10 highest latencies:
System rackdslot1.osadl.org (updated Sat Jun 20, 2026 00:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491690,4ptp4l18255-21apt-get23:15:112
134491680,4ptp4l0-21swapper/200:00:012
165572620,3sleep116562-21irqrtprio22:00:171
134491590,9ptp4l0-21swapper/221:41:412
1731995827,9cyclictest9-21ksoftirqd/020:55:200
134491580,7ptp4l0-21swapper/219:05:092
134491580,4ptp4l0-21swapper/223:02:142
134491570,3ptp4l0-21swapper/222:14:482
134491560,4ptp4l0-21swapper/319:05:193
134491560,4ptp4l0-21swapper/219:57:412
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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