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2026-07-05 - 07:16
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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 Sun Jul 05, 2026 00:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2830272228170,18sleep20-21swapper/219:09:462
2828722228168,18sleep60-21swapper/619:07:336
2829172227162,18sleep40-21swapper/419:08:114
2830012221163,19sleep50-21swapper/519:09:255
2828112221160,19sleep10-21swapper/119:06:391
2827252215186,19sleep30-21swapper/319:05:283
2828282213184,19sleep70-21swapper/719:06:537
2829602210179,19sleep00-21swapper/019:08:470
283935994141,0cyclictest0-21swapper/421:05:014
28393799341,32cyclictest1-21systemd19:45:015
283941993328,5cyclictest0-21swapper/622:50:006
28394199330,1cyclictest0-21swapper/622:45:006
28393499330,3cyclictest346743-21cron21:05:013
28394399320,31cyclictest316477-21/usr/sbin/munin20:10:047
28394399320,31cyclictest316477-21/usr/sbin/munin20:10:037
283941993227,1cyclictest0-21swapper/623:09:586
28393799320,31cyclictest287591-21unix_chkpwd19:20:015
283934993225,6cyclictest286159-21latency_hist19:15:013
28393499320,31cyclictest435312-21apt-get23:45:013
28393499320,31cyclictest435312-21apt-get23:45:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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