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2026-04-08 - 22:00
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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 rack5slot3.osadl.org (updated Wed Apr 08, 2026 12:54:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
128609977755,719cyclictest0-21swapper/711:50:307
128609969919,677cyclictest0-21swapper/710:30:257
128549968087,169cyclictest0-21swapper/111:54:171
128609967580,592cyclictest0-21swapper/711:17:437
128539967034,127cyclictest0-21swapper/012:14:100
128549966671,380cyclictest0-21swapper/112:40:181
128539966426,84cyclictest7347-21/usr/sbin/munin11:15:390
128539965357,380cyclictest0-21swapper/008:10:200
128609963483,515cyclictest0-21swapper/711:59:267
128609962934,592cyclictest0-21swapper/708:52:117
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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