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2026-04-18 - 20:18
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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 Apr 18, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19969562245186,47sleep40-21swapper/407:05:134
19969822243183,20sleep30-21swapper/307:05:363
19969932219188,20sleep50-21swapper/507:05:465
19971462217188,18sleep60-21swapper/607:07:556
19970332215185,19sleep70-21swapper/707:06:207
19970082214184,19sleep00-21swapper/007:05:570
19970832211182,19sleep10-21swapper/107:07:031
19991552210159,40sleep20-21swapper/207:08:562
199947399510,50cyclictest0-21swapper/411:57:584
199947899502,24cyclictest0-21swapper/608:27:186
199947899330,29cyclictest278-21plymouthd07:30:026
1999471993226,5cyclictest278-21plymouthd08:25:013
1999471993226,3cyclictest0-21swapper/312:15:023
199946699320,31cyclictest2081330-21sh09:40:012
199946699320,30cyclictest2078650-21apt09:35:012
199946199320,32cyclictest681-21dbus-daemon11:20:020
1999482993125,5cyclictest1-21systemd10:50:017
199948299310,2cyclictest369-21systemd-journal11:40:027
199947899310,29cyclictest369-21systemd-journal09:30:016
199947899310,28cyclictest0-21swapper/609:32:576
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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