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2026-06-29 - 13:48
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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 Mon Jun 29, 2026 00:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491660,4ptp4l11267-21apt-get19:40:121
206242640,3sleep30-21swapper/300:35:273
134491640,5ptp4l0-21swapper/320:10:213
2975999637,16cyclictest29571-21cat23:45:200
2975999636,12cyclictest22488-21grep23:30:230
2975999626,9cyclictest0-21swapper/023:50:140
134491610,4ptp4l0-21swapper/323:35:043
317092600,5sleep09-21ksoftirqd/021:30:280
2975999597,11cyclictest1860-21ntpq23:55:230
2975999596,10cyclictest7054-21fschecks_time19:30:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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