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2026-08-18 - 20:33
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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 Tue Aug 18, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
247908899728727,1cyclictest0-21swapper/1320:16:585
2479084995866,42cyclictest0-21swapper/1222:46:144
24790449957623,552cyclictest0-21swapper/223:33:148
24790849957410,27cyclictest0-21swapper/1223:06:144
24790639957421,552cyclictest0-21swapper/700:13:1413
24790639957421,552cyclictest0-21swapper/700:13:1413
24790889955315,460cyclictest0-21swapper/1319:12:155
24790449953716,519cyclictest0-21swapper/221:43:148
24790449953613,522cyclictest0-21swapper/222:01:148
24790449953110,520cyclictest0-21swapper/219:37:158
2479068995170,0cyclictest0-21swapper/919:12:1515
247907399507505,2cyclictest2600586-21kworker/10:1+i915-unordered21:43:142
247907399500499,1cyclictest2692860-21kworker/10:0+i915-unordered23:33:142
247909699498497,1cyclictest2499708-21kworker/15:2+i915-unordered20:07:157
24790639947628,29cyclictest0-21swapper/719:25:5913
24790639947628,28cyclictest0-21swapper/700:02:3513
24790639947425,29cyclictest0-21swapper/723:06:0013
24790849947324,30cyclictest0-21swapper/1223:41:354
24790639947224,29cyclictest0-21swapper/723:59:5813
247909699470469,1cyclictest2725264-21kworker/15:0+i915-unordered00:13:147
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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