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2026-06-29 - 15:48
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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 12:45:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
71521370,7sleep31245299cyclictest09:00:263
134491690,4ptp4l20721-21ntp_states07:25:211
134491640,3ptp4l31625-21diskstats07:50:131
134491630,16ptp4l10116-21apt-get07:05:113
134491620,3ptp4l29985-21grep11:15:002
12449996229,3cyclictest9-21ksoftirqd/011:35:250
134491590,4ptp4l0-21swapper/212:10:252
134491580,4ptp4l17871-21apt-get08:30:091
134491580,3ptp4l0-21swapper/109:50:201
134491570,4ptp4l9403-21apt-get10:30:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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