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2026-04-15 - 22:44
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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 rackeslot6.osadl.org (updated Wed Apr 15, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2417098999584,8cyclictest2494509-21latency_hist11:10:010
2417098999181,7cyclictest2486040-21latency_hist10:45:010
2417098998576,7cyclictest2438006-21latency_hist08:15:010
2417098998573,9cyclictest266-21systemd-journal07:35:000
2417098998573,9cyclictest266-21systemd-journal07:35:000
2417101998476,6cyclictest2512026-21latency_hist12:05:011
2417101998472,11cyclictest2429824-21http07:50:011
2417101998275,5cyclictest2428205-21latency_hist07:45:011
2417098998169,10cyclictest2452608-21apt-get09:00:110
2417101998070,8cyclictest2473336-21kworker/u8:1+flush-179:010:20:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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