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2026-08-03 - 16:47
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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 Mon Aug 03, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34020689957911,567cyclictest0-21swapper/621:24:4312
34020689956240,521cyclictest0-21swapper/622:19:4312
34020739953514,520cyclictest0-21swapper/723:17:4213
340206899517516,1cyclictest0-21swapper/623:54:4212
340204999498497,1cyclictest3503156-21kworker/1:0+i915-unordered21:36:431
340210299492491,1cyclictest3483266-21kworker/14:0+i915-unordered21:18:436
340207999486456,30cyclictest0-21swapper/921:36:4315
34020469948423,460cyclictest0-21swapper/000:24:420
340207399483481,1cyclictest3503456-21kworker/7:2+i915-unordered21:27:4313
340207999481479,2cyclictest3547531-21kworker/9:1+i915-unordered22:11:4315
340210799480479,1cyclictest3592021-21kworker/15:0+i915-unordered23:17:427
340204999479478,1cyclictest3644141-21kworker/1:0+i915-unordered00:08:421
340205499478477,1cyclictest0-21swapper/221:43:438
340204999478448,30cyclictest0-21swapper/100:27:421
340210299475474,1cyclictest3515335-21kworker/14:1+i915-unordered21:24:436
340207399475474,1cyclictest3615937-21kworker/7:2+i915-unordered23:42:4213
340207999469468,1cyclictest3660029-21kworker/9:1+i915-unordered00:27:4215
340207999468438,30cyclictest0-21swapper/900:08:4215
34020589946717,29cyclictest0-21swapper/322:44:059
340207399465436,29cyclictest0-21swapper/723:06:4313
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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