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2026-03-20 - 18:39
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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 Fri Mar 20, 2026 12:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2999021350,4sleep3778699cyclictest09:05:223
134491770,12ptp4l5452-21apt-get07:05:110
121162760,5sleep20-21swapper/210:45:182
212732750,5sleep341-21ksoftirqd/311:05:173
778699650,3cyclictest2187-21missed_timers08:05:203
134491630,5ptp4l0-21swapper/207:35:162
134491620,4ptp4l0-21swapper/212:20:112
134491610,4ptp4l0-21swapper/009:55:250
778699580,29cyclictest6396-21taskset11:43:113
134491580,5ptp4l0-21swapper/008:42:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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