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2026-04-18 - 11:43
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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 Sat Apr 18, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30667299721328,393cyclictest0-21swapper/1123:05:023
3066879956710,27cyclictest0-21swapper/1423:48:036
3066489954610,535cyclictest0-21swapper/521:53:0311
3066459951110,498cyclictest0-21swapper/423:45:0310
3066299950620,27cyclictest0-21swapper/022:17:030
30666799502500,2cyclictest335499-21kworker/10:1+i915-unordered19:50:032
3066299950219,44cyclictest0-21swapper/021:06:030
30663499501471,30cyclictest0-21swapper/120:48:031
3066299950025,58cyclictest0-21swapper/022:11:240
30665399497496,1cyclictest532591-21kworker/6:2+i915-unordered23:52:0312
3066299949528,28cyclictest0-21swapper/022:33:030
3066299949517,477cyclictest0-21swapper/019:51:030
3066879949011,58cyclictest0-21swapper/1420:32:486
306657994900,0cyclictest0-21swapper/719:51:0313
3066459949018,59cyclictest61-21ksoftirqd/420:18:0310
30666799487487,0cyclictest470940-21kworker/10:2+i915-unordered23:02:032
30665399485483,1cyclictest480331-21kworker/6:2+i915-unordered22:58:0312
30663499480478,2cyclictest0-21swapper/119:51:031
306629994770,0cyclictest0-21swapper/021:36:030
3066919947326,30cyclictest0-21swapper/1500:06:477
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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