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2026-05-25 - 18:43
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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 rackfslot7.osadl.org (updated Mon May 25, 2026 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2565630998950,20cyclictest2579818-21grep07:35:034
256563099780,59cyclictest2605805-21ntp_states08:20:184
256563099770,59cyclictest0-21swapper/412:34:254
2565630997335,19cyclictest2737486-21grep12:20:214
2565615997372,1cyclictest2661842-21munin-run10:05:011
2565630997112,0cyclictest0-21swapper/407:55:164
2565630996625,19cyclictest2663337-21collect210:05:204
2565630996016,41cyclictest2594844-21ntpq08:00:204
2565630995918,19cyclictest2637907-21perl09:20:164
2565615995938,20cyclictest2733295-21kworker/7:112:35:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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