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2026-08-21 - 22:51
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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 Fri Aug 21, 2026 12:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
301669911483,20cyclictest14-21ksoftirqd/008:05:120
1697621120,5chrt16275-21/usr/sbin/munin08:00:281
301669910771,22cyclictest14-21ksoftirqd/007:50:140
301669910513,78cyclictest0-21swapper/008:30:130
301669910512,80cyclictest0-21swapper/012:35:100
301669910473,19cyclictest14-21ksoftirqd/007:20:110
301669910314,35cyclictest0-21swapper/007:40:110
301669910312,77cyclictest0-21swapper/007:30:130
301669910275,17cyclictest14-21ksoftirqd/010:30:230
301669910275,17cyclictest14-21ksoftirqd/010:30:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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