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2026-07-14 - 13:37
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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 Jul 14, 2026 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491840,18ptp4l8422-21apt-get23:50:031
156082830,4sleep20-21swapper/221:45:192
161272720,5sleep00-21swapper/022:55:260
290142680,3sleep00-21swapper/019:55:210
6930996735,4cyclictest33-21ksoftirqd/222:30:012
6930996631,5cyclictest33-21ksoftirqd/222:45:012
6930996433,8cyclictest33-21ksoftirqd/200:20:262
6930996431,5cyclictest33-21ksoftirqd/220:50:152
6930996333,9cyclictest33-21ksoftirqd/223:35:282
6930996332,7cyclictest33-21ksoftirqd/221:00:212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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