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2026-01-08 - 11:15
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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 Thu Jan 08, 2026 00:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4208211217,50sleep00-21swapper/019:05:470
2495321080,6chrt24670-21/usr/sbin/munin21:35:181
324672920,5chrt32468-21/usr/sbin/munin21:55:311
4786998811,61cyclictest0-21swapper/021:30:110
4786998714,63cyclictest0-21swapper/019:40:110
4786998713,66cyclictest0-21swapper/022:35:110
4786998620,60cyclictest250-21systemd-journal23:56:210
4786998614,65cyclictest0-21swapper/000:35:120
4786998613,63cyclictest0-21swapper/023:40:140
4786998612,67cyclictest0-21swapper/019:20:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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