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2026-05-12 - 09:21
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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 rack8slot4.osadl.org (updated Tue May 12, 2026 00:44:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38475292230172,48sleep00-21swapper/019:08:360
38452732217162,45sleep30-21swapper/319:05:093
38476212209179,19sleep70-21swapper/719:09:567
38474672208177,21sleep10-21swapper/119:07:401
38473912208180,19sleep40-21swapper/419:06:384
38473842208179,19sleep60-21swapper/619:06:336
38475072206178,19sleep50-21swapper/519:08:165
38474272205177,19sleep20-21swapper/219:07:092
3847857993326,6cyclictest374-21systemd-journal21:20:017
3847857993326,6cyclictest374-21systemd-journal21:20:017
3847845993328,4cyclictest4021456-21cron00:20:013
3847857993226,5cyclictest0-21swapper/722:50:167
384785799320,1cyclictest3921366-21apt-get21:20:147
384785799320,0cyclictest0-21swapper/722:55:147
3847852993226,5cyclictest3960430-21apt-get22:30:146
3847846993227,4cyclictest3918125-21cron21:15:014
384784299320,30cyclictest4021914-21apt-get00:20:152
384784099320,31cyclictest3915333-21unix_chkpwd21:10:011
384783699320,31cyclictest3862833-21apt-get19:35:130
3847846993127,3cyclictest3996235-21latency_hist23:35:014
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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