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2026-04-16 - 09:33
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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 rack0slot5.osadl.org (updated Thu Apr 16, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41003999728307,419cyclictest0-21swapper/223:52:508
41009499713313,399cyclictest0-21swapper/1519:59:027
41003499542540,1cyclictest515512-21kworker/1:2+i915-unordered21:23:061
410030995332,530cyclictest0-21swapper/021:35:060
4100509953222,44cyclictest0-21swapper/500:15:0611
410050995297,521cyclictest0-21swapper/520:28:0611
4100859951213,498cyclictest0-21swapper/1323:57:065
4100349951114,496cyclictest0-21swapper/122:32:061
41003999498497,1cyclictest0-21swapper/219:51:078
41005099488488,0cyclictest640059-21kworker/5:1+i915-unordered23:57:0611
41005899487485,2cyclictest455184-21kworker/7:2+i915-unordered20:42:0613
4100829947922,58cyclictest0-21swapper/1222:06:504
4100729947911,467cyclictest0-21swapper/1019:55:072
4100349947653,30cyclictest34-21ksoftirqd/123:33:061
4100349947653,30cyclictest34-21ksoftirqd/123:33:061
41003499472470,2cyclictest616124-21kworker/1:1+i915-unordered23:27:061
4100349946115,29cyclictest0-21swapper/119:56:061
4100629946017,29cyclictest0-21swapper/821:08:5014
4100399945211,29cyclictest0-21swapper/221:12:068
410062994514,58cyclictest0-21swapper/821:13:0614
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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