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2026-05-08 - 07:10
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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 Fri May 08, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
224721498,24sleep20-21swapper/218:57:142
33479912843,58cyclictest0-21swapper/200:26:532
32949912151,17cyclictest10363-21latency_hist19:21:390
3322991192,97cyclictest2937-21apt-get21:41:591
3322991192,97cyclictest2937-21apt-get21:41:591
3360991182,44cyclictest25501-21chrt23:11:513
3322991184,92cyclictest27133-21apt-get22:21:511
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
32949911650,14cyclictest27900-21kworker/u17:1+xprtiod21:35:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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