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2026-03-13 - 16:55
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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 rack0slot8.osadl.org (updated Fri Mar 13, 2026 12:45:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15549799445440,4cyclictest0-21swapper/007:10:310
15551299433430,1cyclictest0-21swapper/1407:10:316
15549799432426,5cyclictest382644-21kworker/u64:1+events_unbound12:01:580
155497994320,1cyclictest0-21swapper/010:20:040
155497994301,428cyclictest0-21swapper/010:16:370
155497994300,0cyclictest0-21swapper/010:13:350
15551099425422,2cyclictest441740-21kworker/u64:5+events_unbound12:07:404
15549799425419,5cyclictest96539-21kworker/u64:6+events_unbound07:21:430
15549799425419,5cyclictest3946166-21kworker/u64:2+events_unbound07:18:200
15551299423420,1cyclictest0-21swapper/1410:20:056
15549799420416,3cyclictest0-21swapper/009:42:300
15551299419416,2cyclictest0-21swapper/1410:13:346
15551299419416,1cyclictest0-21swapper/1410:16:376
15549799419414,4cyclictest0-21swapper/007:26:180
15549799418412,5cyclictest487509-21StreamT~ns0
15551299417416,0cyclictest0-21swapper/1412:01:596
15551299411409,1cyclictest0-21swapper/1407:21:446
15551299409409,0cyclictest0-21swapper/1407:18:206
15551299407406,0cyclictest0-21swapper/1409:42:316
15550799407403,3cyclictest337668-21kworker/u64:6+events_unbound10:20:0415
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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