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2026-01-10 - 10:50
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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 rackfslot7.osadl.org (updated Sat Jan 10, 2026 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1800553998911,0cyclictest0-21swapper/722:35:167
1800549997113,19cyclictest0-21swapper/520:05:165
1800548996123,19cyclictest1887711-21latency_hist21:45:014
1800544996122,39cyclictest0-21swapper/019:40:130
180054999590,20cyclictest0-21swapper/500:00:165
180054899590,57cyclictest1930530-21kworker/u32:5+events_unbound00:35:024
1800548995616,39cyclictest0-21swapper/421:17:174
1800548995519,35cyclictest0-21swapper/422:47:294
1800548995519,35cyclictest0-21swapper/422:32:524
1800548995519,35cyclictest0-21swapper/422:17:094
1800548995519,35cyclictest0-21swapper/421:22:124
1800548995519,35cyclictest0-21swapper/420:05:054
1800548995519,35cyclictest0-21swapper/419:11:384
1800548995519,16cyclictest0-21swapper/421:53:134
1800548995514,40cyclictest1963031-21ntpq23:55:194
1800548995453,1cyclictest1896526-21munin-run22:00:004
1800548995435,19cyclictest1812416-21grep19:30:144
1800548995419,35cyclictest0-21swapper/423:37:404
1800548995419,35cyclictest0-21swapper/422:09:054
1800548995419,35cyclictest0-21swapper/420:30:334
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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