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2026-09-08 - 15:51
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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 Tue Sep 08, 2026 12:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31474892255190,20sleep20-21swapper/207:07:592
31476122233169,19sleep40-21swapper/407:09:484
31475842215183,20sleep50-21swapper/507:09:245
31474972213184,19sleep10-21swapper/107:08:081
31474522208175,21sleep30-21swapper/307:07:293
31452902208178,20sleep00-21swapper/007:05:250
31475862205175,20sleep70-21swapper/707:09:267
31475402204174,19sleep60-21swapper/607:08:456
314785699340,32cyclictest379-21systemd-journal12:15:013
314786099330,32cyclictest0-21swapper/408:11:284
314786699320,32cyclictest3324203-21cron12:25:017
314786599320,31cyclictest3329761-21cron12:35:006
3147860993227,4cyclictest3150504-21cron07:15:014
3147854993227,4cyclictest3168292-21latency_hist07:45:022
314786699310,30cyclictest1-21systemd09:45:027
3147860993122,5cyclictest3240661-21909:55:014
314786099310,3cyclictest3262935-21sqv10:35:004
314786099310,28cyclictest0-21swapper/410:21:254
3147856993127,3cyclictest3304766-21awk11:50:013
3147856993127,3cyclictest3304766-21awk11:50:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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