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2026-08-18 - 08:02
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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 rack3slot6.osadl.org (updated Tue Aug 18, 2026 00:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
293999910245,51cyclictest14-21ksoftirqd/000:10:120
293999910011,17cyclictest0-21swapper/021:15:140
29399999614,18cyclictest0-21swapper/020:15:140
29399999613,18cyclictest0-21swapper/023:35:130
29399999516,17cyclictest0-21swapper/000:15:120
29399999515,18cyclictest0-21swapper/020:35:130
29399999514,19cyclictest0-21swapper/023:50:160
29399999412,18cyclictest0-21swapper/022:50:140
29399999316,17cyclictest0-21swapper/021:35:140
29399999315,17cyclictest0-21swapper/019:30:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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