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2026-04-24 - 15:02
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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 24, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2493089954625,519cyclictest0-21swapper/121:50:521
2493159954599,444cyclictest346750-21kworker/3:0+i915-unordered21:49:529
2493579950022,58cyclictest0-21swapper/1321:07:155
2493579950022,58cyclictest0-21swapper/1321:07:155
24936599484483,1cyclictest0-21swapper/1521:40:527
24933799483482,1cyclictest370745-21kworker/9:2+i915-unordered21:50:5215
2493049948310,58cyclictest0-21swapper/019:46:340
2493159948214,467cyclictest52-21ksoftirqd/322:56:529
24931599479477,2cyclictest394853-21kworker/3:1+i915-unordered22:26:529
2493579947729,30cyclictest0-21swapper/1323:42:145
2493089947625,30cyclictest0-21swapper/119:50:351
249304994752,59cyclictest0-21swapper/019:25:370
2493579947424,30cyclictest0-21swapper/1321:00:145
2493579947322,30cyclictest0-21swapper/1321:24:385
2493089947326,28cyclictest0-21swapper/120:27:361
2493579947221,30cyclictest0-21swapper/1320:30:355
2493309946921,30cyclictest0-21swapper/720:36:1413
24933799467467,0cyclictest0-21swapper/920:12:5215
2493539946623,29cyclictest0-21swapper/1219:59:524
2493159946612,454cyclictest0-21swapper/323:21:529
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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