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2026-08-09 - 18:51
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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 Aug 09, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31722559954716,530cyclictest0-21swapper/523:46:3111
31722509953432,501cyclictest0-21swapper/422:37:3110
31722559952734,0cyclictest0-21swapper/522:56:3111
3172247995228,512cyclictest0-21swapper/323:48:319
317224799521520,1cyclictest3237110-21kworker/3:2+i915-unordered20:41:319
317228899520518,1cyclictest3394250-21kworker/13:0+i915-unordered23:46:315
31722429952022,497cyclictest0-21swapper/222:19:318
317225599513512,1cyclictest0-21swapper/500:23:3111
317228899485485,0cyclictest3430254-21kworker/13:0+i915-unordered00:23:315
317227999485484,1cyclictest3394996-21kworker/11:0+i915-unordered23:48:313
317229799483481,2cyclictest3341821-21kworker/15:1+i915-unordered22:44:317
31722369948221,460cyclictest0-21swapper/023:14:310
317225599477477,0cyclictest0-21swapper/520:22:3111
317225599476476,0cyclictest3217072-21kworker/5:2+i915-unordered20:02:3111
31722369947420,454cyclictest16-21ksoftirqd/022:56:310
31722929947324,30cyclictest0-21swapper/1422:27:156
317225999473472,1cyclictest3221025-21kworker/6:0+i915-unordered20:21:3112
31722369947115,455cyclictest0-21swapper/020:49:310
31722369946811,456cyclictest0-21swapper/022:37:310
31722369946627,438cyclictest0-21swapper/020:02:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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