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2026-04-19 - 13:19
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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 Sun Apr 19, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119219995833,27cyclictest0-21swapper/1122:23:013
119219995833,27cyclictest0-21swapper/1122:23:013
11918499550548,2cyclictest276949-21kworker/3:2+i915-unordered22:23:019
11918499550548,2cyclictest276949-21kworker/3:2+i915-unordered22:23:019
11922499529527,2cyclictest373402-21kworker/12:2+i915-unordered00:31:014
11921299518515,2cyclictest301100-21kworker/10:0+i915-unordered23:02:012
1191849951817,500cyclictest0-21swapper/321:17:019
119173995147,29cyclictest0-21swapper/023:02:010
1192359951212,499cyclictest0-21swapper/1523:08:017
11922499498497,1cyclictest357506-21kworker/12:0+i915-unordered00:10:014
11919699489488,1cyclictest0-21swapper/600:15:0112
11920199483481,2cyclictest305047-21kworker/7:1+i915-unordered23:08:0113
11918799477475,2cyclictest0-21swapper/400:31:0110
1191739947612,463cyclictest0-21swapper/000:15:010
119196994757,467cyclictest781ktimers/620:42:0112
1191849947221,30cyclictest0-21swapper/300:32:459
1191849947120,30cyclictest0-21swapper/321:34:229
11919699470440,30cyclictest0-21swapper/619:18:0112
119173994701,29cyclictest0-21swapper/019:41:010
119173994701,29cyclictest0-21swapper/019:41:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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