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2026-06-17 - 11:02
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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 Jun 17, 2026 00:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38740522222163,19sleep30-21swapper/319:06:053
38741482218159,19sleep50-21swapper/519:07:285
38743152216188,19sleep60-21swapper/619:09:546
38741302214185,19sleep70-21swapper/719:07:137
38741992212183,19sleep20-21swapper/219:08:132
38742072206177,19sleep10-21swapper/119:08:201
38741452206177,19sleep40-21swapper/419:07:274
38739982206177,19sleep00-21swapper/019:05:210
3874541994644,1cyclictest0-21swapper/422:40:014
387454599320,4cyclictest4036901-21cron00:00:016
3874542993230,1cyclictest0-21swapper/522:40:015
3874545993127,3cyclictest3995045-21cron22:45:016
387454199310,29cyclictest0-21swapper/423:30:014
3874538993127,3cyclictest3891889-21cron19:40:013
387453899310,2cyclictest279850-21systemd-journal00:05:013
387453899310,29cyclictest0-21swapper/300:15:013
387453899310,29cyclictest0-21swapper/300:15:013
387454899300,29cyclictest3975982-21apt-get22:10:037
3874545993028,1cyclictest279850-21systemd-journal20:25:016
3874542993028,1cyclictest1-21systemd22:20:025
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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