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2025-10-21 - 02:22
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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 20 highest latencies:
System rackeslot5.osadl.org (updated Mon Oct 20, 2025 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2322099300,30cyclictest12193-21sh07:55:011
23219993028,1cyclictest16858-21idleruntime-cro08:05:010
2321999300,2cyclictest31450-21cron08:35:000
2322299290,28cyclictest19238-21munin-run11:35:013
2322299290,28cyclictest0-21swapper/311:45:133
2322299290,1cyclictest12194-21sh07:55:013
23221992927,1cyclictest340-21cron07:30:002
23221992927,1cyclictest18031-21cron12:40:002
23221992927,1cyclictest18031-21cron12:40:002
2322199290,28cyclictest24459-21apt-get08:20:142
2322099290,29cyclictest19233-21perf11:35:001
2322099290,28cyclictest7795-21apt-get11:10:131
2322099290,28cyclictest0-21swapper/109:15:131
23219992928,1cyclictest611-21avahi-daemon09:25:000
23219992927,1cyclictest9862-21munin-run11:15:000
23219992927,1cyclictest0-21swapper/011:30:010
2321999290,28cyclictest0-21swapper/010:45:130
2321999290,28cyclictest0-21swapper/007:30:110
2321999290,28cyclictest0-21swapper/007:20:140
23222992828,0cyclictest0-21swapper/311:10:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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