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2026-06-25 - 10:35
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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 rackeslot6.osadl.org (updated Thu Jun 25, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
327373999138121,8cyclictest1213033-21systemd-journal20:00:021
327373999121110,8cyclictest1213033-21systemd-journal19:50:001
327373999109101,6cyclictest3270636-21kworker/u8:3+flush-179:019:25:021
32737359910784,11cyclictest3311000-21apt-get21:05:100
32737359910698,5cyclictest3286381-21true19:50:010
32737399910291,8cyclictest1213033-21systemd-journal21:40:261
32737399910192,7cyclictest3300958-21kworker/u8:3+flush-179:021:05:011
32737399910092,6cyclictest3273591-21latency_hist19:10:031
3273735999689,5cyclictest3300958-21kworker/u8:3+flush-179:021:20:010
3273735999585,7cyclictest3349458-21latency_hist23:05:020
3273735999284,5cyclictest3351280-21kworker/u8:3+flush-179:023:50:000
3273735999281,8cyclictest3346243-21kworker/u8:0+flush-179:023:00:000
3273735999180,8cyclictest3326657-21apt-get21:55:010
3273735999077,10cyclictest1213033-21systemd-journal19:15:000
3273739998980,7cyclictest3375237-21latency_hist00:25:001
3273739998977,9cyclictest1213033-21systemd-journal00:35:011
3273735998776,9cyclictest1213033-21systemd-journal20:15:000
3273739998678,6cyclictest3304120-21latency_hist20:45:021
3273739998676,8cyclictest3336721-21apt-get22:25:121
3273739998477,5cyclictest3283148-21kworker/u8:0+flush-179:019:40:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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