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2026-01-11 - 04:49
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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 Sun Jan 11, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8584912720,2sleep10-21swapper/121:33:071
6960902390,0sleep1696093-21cut19:33:051
8362472340,2sleep00-21swapper/021:22:080
667986992623,2cyclictest1159950-21munin-run00:20:000
667986992615,10cyclictest1056625-21kthreadcore23:23:070
667986992512,8cyclictest1081392-21cut23:38:010
667986992414,5cyclictest1045140-21cstates23:18:010
667986992411,8cyclictest993683-21kthreadcore22:48:060
667986992314,5cyclictest1146345-21kthreadcore00:13:050
667986992310,8cyclictest874317-21kthreadcore21:43:050
667986992310,5cyclictest882125-21aten2.4-expect21:48:000
11365602230,2sleep20-21swapper/200:08:062
11365602230,2sleep20-21swapper/200:08:062
66798699229,8cyclictest1138152-21kthreadcore00:08:070
66798699229,8cyclictest1138152-21kthreadcore00:08:070
667986992212,5cyclictest954005-21/usr/sbin/munin22:28:020
667986992210,7cyclictest1105492-21perf23:50:000
66798699217,4cyclictest0-21swapper/023:53:080
667986992118,2cyclictest773630-21apt-key20:35:000
667986992113,4cyclictest931333-21kthreadcore22:13:080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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