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2026-04-23 - 21:32
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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 Thu Apr 23, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8569442239179,19sleep20-21swapper/207:07:152
8570402232169,20sleep40-21swapper/407:08:384
8569182232168,21sleep30-21swapper/307:06:523
8570872227194,21sleep60-21swapper/607:09:206
8569962226167,18sleep70-21swapper/707:08:007
8569562222186,23sleep50-21swapper/507:07:265
8568962222169,17sleep10-21swapper/107:06:331
8570812213179,22sleep00-21swapper/007:09:140
85732899350,7cyclictest910950-21cron08:45:016
857329993432,1cyclictest0-21swapper/711:05:017
85732999340,3cyclictest941681-21cron09:40:017
85732999330,3cyclictest885824-21cron08:00:017
857329993232,0cyclictest0-21swapper/707:30:137
85732999320,31cyclictest851rcuc/709:15:137
857316993230,1cyclictest0-21swapper/109:05:061
857316993229,2cyclictest3986178-21systemd-journal12:05:011
857316993226,4cyclictest3986178-21systemd-journal11:35:011
857313993227,4cyclictest1030842-21perf12:24:560
85732399310,30cyclictest19-1pr/legacy12:15:014
857319993129,2cyclictest1030591-21cron12:17:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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