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2026-06-24 - 10:03
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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 Wed Jun 24, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
207121180,4sleep02073-21df_abs19:05:140
134491670,22ptp4l30307-21/usr/sbin/munin22:25:183
134491650,3ptp4l5545-21ls22:40:213
4233996329,4cyclictest9-21ksoftirqd/022:15:320
134491620,5ptp4l0-21swapper/219:09:272
134491620,17ptp4l3247-21python19:05:241
423499609,17cyclictest22436-21seq23:17:021
423499609,13cyclictest22556-21seq20:59:501
423499608,12cyclictest31559-21taskset21:16:301
134491600,16ptp4l0-21swapper/219:57:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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