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2026-06-24 - 10:37
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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 rack3slot6.osadl.org (updated Wed Jun 24, 2026 00:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
605721220,10chrt5585-21apt-get23:05:141
18837999538,51cyclictest27329-21python321:00:320
1841229132,46sleep10-21swapper/119:07:191
18837999035,48cyclictest15646-21apt-get20:30:250
18837998713,58cyclictest0-21swapper/022:00:120
18837998713,58cyclictest0-21swapper/020:15:090
18837998712,63cyclictest0-21swapper/020:50:140
18837998712,59cyclictest0-21swapper/022:35:110
1883799866,68cyclictest495-21apt-get22:50:130
18837998613,58cyclictest0-21swapper/023:40:120
18837998611,60cyclictest0-21swapper/000:00:140
18837998412,63cyclictest0-21swapper/022:40:230
18837998412,63cyclictest0-21swapper/022:40:230
18837998313,61cyclictest0-21swapper/021:05:120
18837998311,61cyclictest0-21swapper/023:00:120
18837998213,57cyclictest0-21swapper/019:30:110
18837998212,60cyclictest0-21swapper/019:15:120
18837998211,58cyclictest29851-21diskmemload21:10:150
1883799817,61cyclictest6312-21apt-get21:35:140
18837998113,59cyclictest0-21swapper/000:05:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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