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2026-05-20 - 14:30
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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 Wed May 20, 2026 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41829911955,21cyclictest14-21ksoftirqd/008:00:110
524121170,6chrt4398-21/usr/sbin/munin10:10:321
41829910914,26cyclictest0-21swapper/009:45:150
41829910715,25cyclictest0-21swapper/007:40:140
41829910513,27cyclictest0-21swapper/010:10:110
41899910421,62cyclictest26-21ksoftirqd/108:50:141
41829910477,16cyclictest14-21ksoftirqd/008:55:140
41829910416,24cyclictest0-21swapper/010:15:110
418999987,68cyclictest0-21swapper/112:10:121
4182999711,41cyclictest0-21swapper/009:50:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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