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2026-03-10 - 18:13
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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 Tue Mar 10, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
282574699940,1cyclictest0-21swapper/512:20:125
2825741997011,19cyclictest0-21swapper/010:42:070
2825741996868,0cyclictest0-21swapper/010:30:130
282574499660,1cyclictest0-21swapper/309:10:143
2825741996426,18cyclictest0-21swapper/011:30:150
2825741996123,2cyclictest1750ktimers/010:01:490
2825741995919,39cyclictest3001941-21seq12:25:350
2825741995919,39cyclictest171ktimers/008:50:240
2825748995819,39cyclictest88-21ksoftirqd/708:40:147
2825741995820,19cyclictest2945444-21diskstats10:45:160
2825741995818,39cyclictest2886289-21sed08:55:230
2825741995738,19cyclictest171ktimers/010:50:220
2825741995719,19cyclictest2940740-21ntpq10:35:200
2825741995717,39cyclictest2881176-21kworker/0:2+ice10:15:010
2825741995636,19cyclictest29127282chrt09:45:120
2825741995632,23cyclictest0-21swapper/007:39:130
2825741995619,2cyclictest876-21mta-sts-daemon08:27:390
2825741995616,39cyclictest171ktimers/010:29:580
2825741995615,19cyclictest236199-21snmpd10:57:230
2825741995536,19cyclictest0-21swapper/007:53:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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