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2026-05-26 - 14:14
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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 Tue May 26, 2026 00:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
831221450,5sleep11434199cyclictest21:15:141
284692770,3sleep128471-21grep21:55:301
284692770,3sleep128471-21grep21:55:301
134491740,2ptp4l9-21ksoftirqd/023:45:230
134491700,5ptp4l0-21swapper/220:20:112
1434399654,18cyclictest29011-21/usr/sbin/munin20:50:163
14340996530,4cyclictest9-21ksoftirqd/023:55:140
43072640,4sleep11434199cyclictest00:35:001
134491600,5ptp4l0-21swapper/119:05:231
134491600,4ptp4l31848-21apt-get23:15:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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