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2026-04-30 - 00:48
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack8slot4.osadl.org (updated Wed Apr 29, 2026 00:44:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20886192233176,46sleep70-21swapper/719:07:557
20886192233176,46sleep70-21swapper/719:07:557
20887452229167,52sleep40-21swapper/419:09:454
20887452229167,52sleep40-21swapper/419:09:454
20886272225173,40sleep60-21swapper/619:08:026
20886272225173,40sleep60-21swapper/619:08:026
20864082219188,20sleep20-21swapper/219:05:082
20864082219188,20sleep20-21swapper/219:05:082
20887552214185,19sleep30-21swapper/319:09:523
20887552214185,19sleep30-21swapper/319:09:523
20887282213184,19sleep50-21swapper/519:09:305
20887282213184,19sleep50-21swapper/519:09:305
20885012212184,19sleep10-21swapper/119:06:111
20885012212184,19sleep10-21swapper/119:06:111
20884532202173,20sleep00-21swapper/019:05:290
20884532202173,20sleep00-21swapper/019:05:290
208899099350,1cyclictest0-21swapper/223:45:012
208899099350,1cyclictest0-21swapper/220:05:022
2089005993434,0cyclictest0-21swapper/720:55:027
208899499340,32cyclictest381-21systemd-journal00:20:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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