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2026-07-31 - 16:06
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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 Fri Jul 31, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31166659953025,504cyclictest0-21swapper/1220:44:484
311663999517516,1cyclictest0-21swapper/622:13:4812
311667099515514,1cyclictest0-21swapper/1300:19:485
3116676995071,505cyclictest0-21swapper/1522:24:487
311663599497494,2cyclictest3370728-21kworker/5:1+i915-unordered00:19:4811
311662399489488,1cyclictest3213978-21kworker/2:1+i915-unordered21:12:488
311667499484484,0cyclictest3246069-21kworker/14:2+i915-unordered22:13:486
311663999482480,2cyclictest3221851-21kworker/6:4+i915-unordered22:52:4812
31166519947726,30cyclictest0-21swapper/921:05:3115
31166519947725,29cyclictest0-21swapper/921:34:3415
31166519947725,29cyclictest0-21swapper/921:34:3415
31166519947526,29cyclictest0-21swapper/900:34:0915
31166479947527,29cyclictest0-21swapper/800:06:0914
31166519947121,30cyclictest0-21swapper/923:17:1115
311665199470469,1cyclictest0-21swapper/900:28:4815
311665199470469,1cyclictest0-21swapper/900:28:4815
31166519946818,30cyclictest0-21swapper/923:07:3015
311663999467466,1cyclictest3206623-21kworker/6:5+i915-unordered22:09:4812
311663999466465,1cyclictest3206623-21kworker/6:5+i915-unordered22:47:4812
31166539946221,29cyclictest0-21swapper/1020:12:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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