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2025-10-21 - 11:09
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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 rack8slot4.osadl.org (updated Tue Oct 21, 2025 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40017492237172,21sleep10-21swapper/119:06:201
39997252221191,19sleep60-21swapper/619:05:056
40018972218186,20sleep50-21swapper/519:08:255
40020042216186,19sleep70-21swapper/719:09:567
39997602214184,19sleep30-21swapper/319:05:343
39997612212185,17sleep40-21swapper/419:05:354
40019322205176,18sleep20-21swapper/219:08:542
39997572205175,19sleep00-21swapper/019:05:310
400220799340,33cyclictest3820478-21systemd-journal19:40:000
400221899320,31cyclictest4090018-21sh21:55:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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