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2026-09-18 - 15:07
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Fri Sep 18, 2026 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38172932680,2sleep30-21swapper/321:39:273
40220212420,1sleep00-21swapper/023:34:250
36623792340,2sleep30-21swapper/319:54:253
40508232280,1sleep10-21swapper/123:50:211
3599440992813,11cyclictest3995840-21kthreadcore23:19:260
3599440992711,11cyclictest3855765-21latency_hist22:00:030
3599440992710,15cyclictest0-21swapper/023:29:030
3599440992710,15cyclictest0-21swapper/023:29:030
3599440992611,13cyclictest3894590-21irqrtprio22:24:210
3599440992514,10cyclictest4138631-40ogrotate00:40:010
359944099248,11cyclictest3924734-21kthreadcore22:39:270
359944099237,1cyclictest0-21swapper/021:29:280
359944099235,12cyclictest0-21swapper/022:49:030
3599440992313,9cyclictest376-21systemd-journal20:05:000
359944099227,11cyclictest3934799-21switchtime22:44:320
359944099225,2cyclictest0-21swapper/000:20:280
3599440992211,4cyclictest3983240-21kernelversion23:14:230
3599441992111,2cyclictest82050irq/121-eno123:14:251
359944099218,12cyclictest0-21swapper/000:19:330
359944099215,9cyclictest3776399-21munin-run21:15:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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