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2026-01-11 - 02:49
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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 Sun Jan 11, 2026 00:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89562990,4sleep10-21swapper/121:30:371
2235599995,76cyclictest0-21swapper/020:05:260
2235599995,76cyclictest0-21swapper/020:05:260
2220829719,66sleep10-21swapper/119:09:571
22355999328,50cyclictest11730-21cron21:40:000
2235599905,59cyclictest0-21swapper/000:37:130
2235599875,53cyclictest0-21swapper/022:05:010
2235599865,52cyclictest0-21swapper/000:05:310
22355998631,48cyclictest13566-21/usr/sbin/munin23:15:320
22355998612,66cyclictest0-21swapper/000:20:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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