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2026-08-15 - 12:51
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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 Sat Aug 15, 2026 00:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33763272239169,21sleep40-21swapper/419:08:364
33762492223166,19sleep00-21swapper/019:07:280
33740982221159,20sleep70-21swapper/719:05:347
33763812220161,19sleep20-21swapper/219:09:242
33763732219161,47sleep30-21swapper/319:09:153
33763572213185,18sleep50-21swapper/519:09:025
33763022203174,19sleep60-21swapper/619:08:156
33740652201173,18sleep10-21swapper/119:05:041
3376665993527,7cyclictest382-21systemd-journal22:20:027
337666599320,30cyclictest3527756-21cron23:40:017
337665699320,31cyclictest3385581-21cron19:25:014
3376654993232,0cyclictest0-21swapper/300:10:013
337664599320,4cyclictest1-21systemd21:55:011
3376665993128,2cyclictest0-21swapper/722:25:027
337666599310,28cyclictest3485947-21apt-get22:25:057
3376662993125,5cyclictest382-21systemd-journal19:40:016
337664199310,30cyclictest3545828-21apt-get00:11:200
337666599300,29cyclictest0-21swapper/720:15:017
337666599300,29cyclictest0-21swapper/719:21:227
337666599300,29cyclictest0-21swapper/700:01:237
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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