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2026-05-21 - 08:55
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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 rackcslot6.osadl.org (updated Thu May 21, 2026 00:46:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
73796699361360,1cyclictest0-21swapper/423:32:034
73796699354351,2cyclictest982694-21kworker/4:022:00:024
73796699353352,1cyclictest0-21swapper/423:11:024
73793399353352,1cyclictest792942-21kworker/0:223:32:020
73796699352350,1cyclictest0-21swapper/423:17:024
73796699351350,1cyclictest0-21swapper/400:10:024
73796699350349,1cyclictest955521-21kworker/4:000:27:024
73796699350349,1cyclictest0-21swapper/422:20:024
73796699350349,1cyclictest0-21swapper/422:20:024
73796699349348,1cyclictest0-21swapper/423:58:024
73796699349347,1cyclictest955521-21kworker/4:000:24:024
73796699348347,1cyclictest869060-21kworker/4:122:53:024
73796699348347,1cyclictest0-21swapper/423:49:024
73796699348347,1cyclictest0-21swapper/423:49:024
73796699348343,2cyclictest783721-21systemd-userwor20:27:024
73796699347346,1cyclictest982694-21kworker/4:021:25:024
73796699347346,1cyclictest0-21swapper/422:49:024
73796699347345,2cyclictest992441-21kworker/4:223:40:024
73796699346345,1cyclictest869060-21kworker/4:122:15:024
73796699346345,1cyclictest869060-21kworker/4:122:11:024
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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