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2026-09-22 - 15:12
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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 Tue Sep 22, 2026 00:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1818021500,6sleep02848899cyclictest22:15:190
1879621460,3sleep32849199cyclictest23:25:233
134491790,4ptp4l0-21swapper/220:32:472
2848999709,59cyclictest17973-21kworker/1:022:45:491
231622620,3sleep00-21swapper/023:35:190
134491610,4ptp4l0-21swapper/300:19:183
134491600,5ptp4l0-21swapper/223:35:122
134491600,3ptp4l3594-21apt-get22:55:142
134491590,4ptp4l0-21swapper/200:14:182
134491580,4ptp4l0-21swapper/220:05:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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