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2026-08-28 - 11:27
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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 Fri Aug 28, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
82525221170,2sleep30-21swapper/321:45:013
7108902490,2sleep30-21swapper/320:34:553
10877852340,2sleep11087652-21ssh00:14:561
596772992411,7cyclictest0-21swapper/022:49:330
596773992313,3cyclictest987854-21irqrtprio23:19:541
59677299239,5cyclictest0-21swapper/021:44:570
596772992312,5cyclictest1121256-21apt-get00:34:340
59677299231,20cyclictest878422-21munin-run22:15:010
59677299227,9cyclictest0-21swapper/022:35:020
596772992218,3cyclictest596769-21cyclictest21:24:330
596772992215,6cyclictest24617-21JS14:54:060
59677299221,19cyclictest612805-21users19:20:020
596772992211,6cyclictest0-21swapper/022:30:020
596773992117,3cyclictest670541-21kthreadcore20:04:561
596773992114,2cyclictest82050irq/121-eno121:39:571
596772992117,2cyclictest1-21systemd23:05:020
596772992112,5cyclictest1-21systemd22:00:020
596772992112,5cyclictest1049208-21idleruntime23:54:540
596772992111,9cyclictest895058-21kthreadcore22:25:010
59677299211,19cyclictest1034550-21ssh23:44:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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