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2026-06-16 - 21:09
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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 rack8slot4.osadl.org (updated Tue Jun 16, 2026 12:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23112362237174,19sleep40-21swapper/407:06:404
23112952230172,46sleep70-21swapper/707:07:317
23112382221160,18sleep60-21swapper/607:06:426
23114702210182,19sleep20-21swapper/207:10:002
23113272206173,21sleep30-21swapper/307:08:003
23112242206181,16sleep10-21swapper/107:06:291
23113152204173,21sleep00-21swapper/007:07:490
23114062202173,19sleep50-21swapper/507:09:075
2311676993328,5cyclictest2376413-21cron09:05:011
231168299321,3cyclictest1-21systemd12:30:004
231168299320,31cyclictest964-21in:imuxsock11:10:014
231168099320,32cyclictest0-21swapper/312:25:013
231168099320,31cyclictest2491839-21cron12:30:013
231169199312,29cyclictest17850irq/4-ttyS007:15:017
231168099310,30cyclictest2318226-21pool-spawner07:20:043
231167699310,29cyclictest2388011-21dpkg09:21:451
231167699310,28cyclictest0-21swapper/111:05:051
231167499310,30cyclictest2480684-21/usr/sbin/munin12:10:010
231169199300,2cyclictest856-21dbus-daemon10:30:017
231169199300,29cyclictest2483483-21cron12:15:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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