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2026-05-16 - 23:09
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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 rackfslot7.osadl.org (updated Sat May 16, 2026 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
62434999126124,1cyclictest0-21swapper/708:10:147
624334997737,39cyclictest800163-21latency12:25:174
624334997517,39cyclictest786-21systemd-logind11:40:224
624334997211,39cyclictest738928-21ntpq10:35:194
624334997133,19cyclictest601ktimers/411:45:574
624334997132,0cyclictest803139-21ntpq12:30:194
624334997111,59cyclictest0-21swapper/411:03:454
62433499709,58cyclictest0-21swapper/408:09:534
624334996829,39cyclictest0-21swapper/412:08:054
62433499679,39cyclictest770165-21ntpq11:30:194
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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