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2026-04-18 - 02:29
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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 rackbslot7.osadl.org (updated Fri Apr 17, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
217409912154,60cyclictest30342-21systemctl10:53:000
217409912154,60cyclictest30342-21systemctl10:53:000
217409912057,57cyclictest19861-21cpu11:28:160
217409911939,10cyclictest0-21swapper/011:53:180
217409911372,26cyclictest30892-21ssh10:53:180
21740991102,41cyclictest18454-21latency_hist10:33:020
21740991102,41cyclictest18454-21latency_hist10:33:020
21740991102,30cyclictest21169-21ssh12:23:340
21740991094,39cyclictest352-21runrttasks12:17:000
217409910816,41cyclictest8731-21kworker/u17:2+rpciod09:23:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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