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2026-06-08 - 08:49
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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 Mon Jun 08, 2026 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24089991087,24cyclictest0-21swapper/022:30:120
24089991077,77cyclictest0-21swapper/021:10:110
24094999213,64cyclictest0-21swapper/122:05:141
24094999112,69cyclictest0-21swapper/121:15:141
2408999897,60cyclictest0-21swapper/020:00:130
2353628957,21sleep10-21swapper/119:06:111
24094998620,52cyclictest0-21swapper/122:25:131
2409499857,19cyclictest13890-21apt-get20:10:221
24094998527,23cyclictest4373-21cron21:15:001
2409499848,21cyclictest9659-21apt-get00:30:131
24094998425,19cyclictest243-21systemd-journal20:26:341
2408999847,15cyclictest0-21swapper/023:50:140
24094998325,22cyclictest457-21dbus-daemon23:20:011
2408999836,14cyclictest0-21swapper/021:30:140
2408999836,13cyclictest0-21swapper/000:35:130
24094998214,56cyclictest0-21swapper/100:35:121
2408999827,59cyclictest0-21swapper/000:05:160
2409499818,21cyclictest17697-21apt-get20:20:231
2409499817,18cyclictest18919-21apt-get21:55:251
2408999817,23cyclictest0-21swapper/023:55:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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