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2025-12-18 - 21:04
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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 rackbslot7.osadl.org (updated Thu Dec 18, 2025 12:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27317991243,49cyclictest3904-21apt-get07:34:532
27076211119,60sleep027073-21munin-run07:09:390
25987210310,66sleep126016-21idleruntime07:05:031
273179910251,43cyclictest0-21swapper/209:45:042
273099910236,24cyclictest6247-21modprobe12:39:361
273099910236,24cyclictest6247-21modprobe12:39:361
273179910051,44cyclictest2362-21kworker/u18:0+events_unbound11:34:372
27317991003,68cyclictest22259-21apt-get10:09:562
27317991003,62cyclictest27806-21df07:10:312
27317991003,62cyclictest27806-21df07:10:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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