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2026-08-13 - 12:24
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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 Aug 13, 2026 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20630042232167,19sleep40-21swapper/419:09:254
20628732231169,19sleep30-21swapper/319:07:313
20628432229167,19sleep20-21swapper/219:07:072
20627682228170,19sleep10-21swapper/119:06:001
20628202216188,18sleep60-21swapper/619:06:456
20627652213183,20sleep70-21swapper/719:05:587
20629202211183,18sleep50-21swapper/519:08:135
20630122208179,19sleep00-21swapper/019:09:290
206482099370,5cyclictest2130323-21latency_hist21:05:021
206484399360,33cyclictest2245146-21latency_hist00:30:027
206482399350,31cyclictest0-21swapper/322:35:013
206482099340,1cyclictest0-21swapper/119:50:021
206482399330,31cyclictest2093726-21unix_chkpwd20:00:013
206482099330,29cyclictest0-21swapper/119:25:011
206482099330,29cyclictest0-21swapper/119:25:011
2064843993231,0cyclictest0-21swapper/722:39:497
206482999320,4cyclictest2182891-21cron22:40:015
206482799320,31cyclictest1-21systemd23:50:024
206481599320,31cyclictest2250551-21cron00:40:010
206481599320,31cyclictest2067939-21cron19:15:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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