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2026-05-05 - 09:50
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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 10 highest latencies:
System rack3slot0.osadl.org (updated Tue May 05, 2026 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
80229912118,37cyclictest13550irq/24-ahci[00021:22:512
239222740,0sleep123921-21systemd-cgroups22:41:521
804199670,66cyclictest12494-21kworker/5:321:22:515
8042995839,19cyclictest1967-21kworker/6:521:22:516
69712540,0sleep10-21swapper/100:29:001
62552530,0sleep00-21swapper/023:45:260
782525027,8sleep30-21swapper/319:08:293
3622500,1sleep449-21ksoftirqd/400:20:384
314692500,1sleep131467-21grepconf.sh21:56:181
234532500,0sleep60-21swapper/623:46:286
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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