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2025-11-15 - 22:21
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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 rack3slot6.osadl.org (updated Sat Nov 15, 2025 12:45:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28290991369,104cyclictest0-21swapper/008:45:140
282909910236,45cyclictest5477-21/usr/sbin/munin07:35:250
28293999528,24cyclictest448-21dbus-daemon11:25:001
28293999312,26cyclictest6375-21diskmemload09:10:131
28293999312,26cyclictest6375-21diskmemload09:10:121
28290999212,62cyclictest0-21swapper/008:20:130
28293999116,64cyclictest0-21swapper/107:50:151
2829099916,68cyclictest0-21swapper/011:40:330
2787828927,49sleep10-21swapper/107:07:371
2829099879,59cyclictest0-21swapper/007:50:140
2829099877,63cyclictest0-21swapper/008:15:160
2829099877,60cyclictest0-21swapper/010:15:120
2829099875,63cyclictest0-21swapper/008:55:320
2829099875,58cyclictest0-21swapper/012:00:370
28290998711,59cyclictest0-21swapper/010:00:140
28293998625,20cyclictest12802-21cron12:30:011
28293998624,27cyclictest14542-21cron12:35:001
2829099868,62cyclictest0-21swapper/011:55:260
28293998525,19cyclictest1520-21cron07:25:011
28293998423,20cyclictest254-21systemd-journal08:19:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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