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2026-06-16 - 15:40
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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
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rack1slot8.osadl.org (updated Tue Jun 16, 2026 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2649399868805,44cyclictest4231-21sendmail_mailst07:35:251
2649299847763,47cyclictest3357-21munin-node07:35:250
2649399412348,47cyclictest0-21swapper/107:10:081
2649299362300,52cyclictest0-21swapper/007:10:080
26492999713,70cyclictest0-21swapper/007:16:590
26492999614,76cyclictest0-21swapper/010:53:580
2649299935,16cyclictest0-21swapper/008:37:000
26492999313,62cyclictest0-21swapper/008:15:000
26492999013,61cyclictest0-21swapper/008:42:590
26492998868,11cyclictest32721-21kworker/0:012:11:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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