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2026-05-20 - 09:36
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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 Wed May 20, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3242499310,2cyclictest23201-21awk00:35:011
32423993129,1cyclictest0-21swapper/023:35:000
32423993128,2cyclictest16284-21cron19:45:010
3242399300,29cyclictest10579-21cron23:00:010
3242699290,28cyclictest0-21swapper/321:05:123
32425992927,1cyclictest29027-21cron22:30:002
3242599290,28cyclictest30619-21munin-run20:15:012
3242599290,28cyclictest0-21swapper/222:40:122
3242599290,1cyclictest0-21swapper/221:05:002
3242599290,0cyclictest0-21swapper/219:50:132
3242499290,28cyclictest27001-21apt-get22:25:121
3242499290,28cyclictest0-21swapper/119:45:131
3242499290,28cyclictest0-21swapper/100:05:181
3242399290,28cyclictest19925-21apt-get23:20:010
3242399290,28cyclictest0-21swapper/019:30:110
32426992828,0cyclictest19433-21apt-get21:00:113
32426992827,1cyclictest0-21swapper/322:50:123
3242599283,25cyclictest0-21swapper/221:49:402
3242599280,0cyclictest0-21swapper/220:00:122
32424992828,0cyclictest30875-21apt-get20:15:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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