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2026-08-12 - 11:16
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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 Wed Aug 12, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31528222227167,19sleep60-21swapper/619:07:136
31529582225165,18sleep30-21swapper/319:09:103
31529622219191,19sleep70-21swapper/719:09:147
31529272212182,19sleep10-21swapper/119:08:441
31529282209159,16sleep20-21swapper/219:08:452
31529172207178,19sleep00-21swapper/019:08:350
31529592205176,19sleep40-21swapper/419:09:114
31529872204173,20sleep50-21swapper/519:09:375
3154868993329,1cyclictest3211627-21920:50:017
315486899320,31cyclictest3208492-21grep20:45:017
315486399320,31cyclictest3319747-21/usr/sbin/munin00:05:015
315486199320,31cyclictest3323847-21sqv00:10:014
315486199320,31cyclictest3317394-21cat00:00:024
315486199320,31cyclictest3163312-21dump-pmu-power19:24:554
315485699320,4cyclictest3233417-21unix_chkpwd21:30:012
315484699320,4cyclictest279850-21systemd-journal23:40:020
315486399310,3cyclictest3188833-21unix_chkpwd20:10:015
3154861993129,1cyclictest1-21systemd19:35:014
315486199310,30cyclictest3326461-21cron00:15:014
315485699310,31cyclictest0-21swapper/219:44:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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