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2025-12-07 - 13:44
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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 20 highest latencies:
System rackdslot3.osadl.org (updated Sun Dec 07, 2025 00:45:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3482229163,22sleep20-21swapper/219:06:082
137191229200,19phc2sys0-21swapper/319:09:593
3522207174,22sleep10-21swapper/119:06:111
3512201168,22sleep00-21swapper/019:06:100
136991700,1ptp4l401ktimersoftd/323:00:313
136991700,1ptp4l401ktimersoftd/323:00:313
136991660,1ptp4l467-21iostat_ios20:15:203
136991550,1ptp4l401ktimersoftd/320:25:213
136991540,1ptp4l401ktimersoftd/321:15:353
136991530,1ptp4l401ktimersoftd/323:52:143
136991480,1ptp4l391rcuc/320:33:003
132891480,2getstats0-21swapper/323:10:183
59298470,11rtkit-daemon591-21rtkit-daemon22:44:261
136991450,0ptp4l401ktimersoftd/300:36:503
136991450,0ptp4l401ktimersoftd/300:36:503
59298440,8rtkit-daemon0-21swapper/223:49:242
136991440,1ptp4l401ktimersoftd/323:56:113
59298430,2rtkit-daemon591-21rtkit-daemon00:03:451
136991430,35ptp4l0-21swapper/319:10:013
136991430,0ptp4l401ktimersoftd/322:03:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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