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2026-04-15 - 07:58
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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 rackeslot8.osadl.org (updated Wed Apr 15, 2026 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38807022310,2sleep1321rcuc/121:00:001
3737131992623,1cyclictest0-21swapper/320:50:023
373713199222,15cyclictest4109293-21taskset23:26:323
373713199222,14cyclictest3880695-21turbostat21:00:003
3737131992219,1cyclictest0-21swapper/320:25:003
373713199221,15cyclictest3916903-21taskset21:25:003
40231542210,10sleep24023201-21ld22:30:232
373713199212,14cyclictest24547-21taskset00:38:203
3737131992119,1cyclictest0-21swapper/321:00:013
3737131992118,1cyclictest0-21swapper/322:45:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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