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2026-04-16 - 04:43
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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 rackcslot4.osadl.org (updated Thu Apr 16, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33450032292250,28sleep00-21swapper/019:09:050
33450812278244,19sleep10-21swapper/119:09:551
334522499632,39cyclictest3457679-21apt-get22:40:101
334522499594,39cyclictest3461176-21apt-get22:45:121
334522499561,37cyclictest3419142-21apt-get21:45:101
179699560,4rtkit-daemon1795-21rtkit-daemon22:29:580
33700252550,3sleep13370024-21perf20:10:001
334522499551,5cyclictest3372159-21apt-get20:15:141
179699550,4rtkit-daemon1795-21rtkit-daemon23:06:490
179699550,4rtkit-daemon1795-21rtkit-daemon21:27:270
3345224995413,29cyclictest3379965-21/usr/sbin/munin20:35:221
3345224995410,29cyclictest3367947-21seq20:03:571
179699540,4rtkit-daemon1795-21rtkit-daemon22:59:100
179699540,4rtkit-daemon1795-21rtkit-daemon21:49:230
179699540,4rtkit-daemon1795-21rtkit-daemon21:18:430
334522499531,7cyclictest3374905-21ntp_states20:20:221
334522499531,5cyclictest3393740-21apt-get21:10:111
334522499522,5cyclictest3385855-21apt-get20:50:141
334522499522,5cyclictest3362757-21ntp_states19:50:211
179699520,5rtkit-daemon1795-21rtkit-daemon21:32:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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