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2026-04-05 - 07:55
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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 Apr 05, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17392912243187,19sleep50-21swapper/519:09:035
17392702237174,50sleep20-21swapper/219:08:432
17371502227170,19sleep70-21swapper/719:06:087
17372562226174,41sleep10-21swapper/119:07:381
17371162216188,18sleep00-21swapper/019:05:370
17393612212182,19sleep60-21swapper/619:10:016
17392802210180,19sleep30-21swapper/319:08:533
17392722208179,18sleep40-21swapper/419:08:464
173960199579,24cyclictest0-21swapper/221:14:272
1739611995250,1cyclictest0-21swapper/522:10:015
173959699480,24cyclictest0-21swapper/021:14:300
1739604993428,5cyclictest1778491-21taskset20:23:003
1739604993428,5cyclictest0-21swapper/321:20:013
173961799330,30cyclictest1886958-21unin-run23:40:017
1739604993317,8cyclictest278-21plymouthd00:40:013
1739604993228,4cyclictest0-21swapper/323:13:023
1739604993227,4cyclictest1751545-21apt-get19:32:593
1739617993129,1cyclictest0-21swapper/700:25:017
173961299310,30cyclictest1900411-21turbostat.cron00:05:006
173960499310,30cyclictest1835209-21sh22:05:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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