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2026-08-14 - 00:19
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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 Thu Aug 13, 2026 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2910099878,68cyclictest20507-21apt-get08:15:110
29100998515,56cyclictest0-21swapper/008:40:110
2910099843,75cyclictest5508-21taskset07:31:350
29100998417,57cyclictest0-21swapper/007:20:130
29100998416,60cyclictest0-21swapper/010:05:150
29100998415,61cyclictest0-21swapper/010:10:130
2910099834,74cyclictest11666-21irqstats09:20:240
29100998317,58cyclictest0-21swapper/011:15:130
29100998316,58cyclictest0-21swapper/007:25:130
29100998316,58cyclictest0-21swapper/007:25:130
29100998315,58cyclictest0-21swapper/007:50:120
29100998214,60cyclictest0-21swapper/011:30:120
29100998214,58cyclictest0-21swapper/010:55:130
2910099813,73cyclictest30811-21latency_hist07:15:010
29100998117,55cyclictest0-21swapper/008:10:150
29100998117,51cyclictest0-21swapper/009:55:110
29100998116,54cyclictest0-21swapper/009:25:220
29100998116,53cyclictest0-21swapper/008:55:130
29100998114,59cyclictest0-21swapper/007:35:110
29100998114,58cyclictest0-21swapper/011:05:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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