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2026-07-11 - 18:56
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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 10 highest latencies:
System rack0slot2.osadl.org (updated Sat Jul 11, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25229752980,1sleep40-21swapper/410:54:594
25892002640,1sleep72589201-21grep11:20:037
202434926049,7sleep50-21swapper/507:06:485
202444725621,30sleep70-21swapper/707:08:107
2024852994239,2cyclictest2409988-21kworker/u16:2+flush-8:010:24:416
2024848994139,2cyclictest2574009-21kworker/u16:3+events_unbound12:35:145
202485799400,38cyclictest2286617-21latency_hist09:19:417
2024848994038,2cyclictest2299063-21kworker/u16:0+events_unbound10:08:475
2024852993936,2cyclictest1995185-21kworker/u16:0+flush-8:007:14:416
2024848993937,2cyclictest2640810-21kworker/u16:0+events_unbound11:47:235
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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