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2026-07-14 - 19:29
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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 12:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491800,11ptp4l2129-21iostat07:05:161
3950996932,6cyclictest41-21ksoftirqd/309:51:433
3950996640,3cyclictest41-21ksoftirqd/309:05:283
3950996630,8cyclictest41-21ksoftirqd/308:09:593
134491650,5ptp4l4148-21apt-get08:20:101
3950996232,6cyclictest41-21ksoftirqd/310:10:003
3950996231,4cyclictest41-21ksoftirqd/310:25:193
3950996230,3cyclictest41-21ksoftirqd/309:13:083
3950996230,3cyclictest41-21ksoftirqd/308:40:013
3950996228,4cyclictest41-21ksoftirqd/310:55:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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