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2026-04-17 - 11:34
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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 Apr 17, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
149977995750,23cyclictest0-21swapper/1022:53:042
1499949952722,504cyclictest0-21swapper/1422:48:046
14995999523522,1cyclictest178640-21kworker/6:0+i915-unordered19:52:0512
1499599951212,499cyclictest0-21swapper/623:56:0412
1499949949313,58cyclictest0-21swapper/1422:09:266
1499779947426,28cyclictest0-21swapper/1021:09:492
1499879947322,30cyclictest0-21swapper/1219:45:274
1499989947120,30cyclictest294961-21switchtime22:04:287
1499919947023,29cyclictest0-21swapper/1321:41:275
1499879946721,30cyclictest0-21swapper/1220:08:264
1499919946618,28cyclictest0-21swapper/1320:10:485
1499919946618,28cyclictest0-21swapper/1320:10:485
1499479946627,30cyclictest52-21ksoftirqd/321:27:049
1499919946315,30cyclictest0-21swapper/1320:03:275
149951994590,458cyclictest0-21swapper/419:57:2810
1499369945813,29cyclictest0-21swapper/021:19:280
14999899455446,6cyclictest366830-21kworker/u64:7+events_unbound00:12:277
149987994557,29cyclictest0-21swapper/1221:07:504
1499879945126,30cyclictest0-21swapper/1200:18:484
1499779945126,29cyclictest0-21swapper/1021:06:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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