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2026-09-22 - 10:57
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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 Tue Sep 22, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8397399485485,0cyclictest317895-21kworker/11:2+i915-unordered00:23:083
8397399479479,0cyclictest155746-21kworker/11:0+i915-unordered20:33:083
8397399479479,0cyclictest155746-21kworker/11:0+i915-unordered20:33:083
8395799475475,0cyclictest92580-21kworker/7:0+i915-unordered19:16:0813
8395499469469,0cyclictest0-21swapper/619:41:0812
839529946622,28cyclictest0-21swapper/519:50:3111
8398799454452,1cyclictest112781-21kworker/14:1+i915-unordered19:41:086
839629944823,424cyclictest97-21ksoftirqd/819:09:0414
8393699448445,2cyclictest128774-21kworker/u64:10+events_unbound21:13:081
839529944722,30cyclictest0-21swapper/500:07:3011
839529944721,30cyclictest0-21swapper/523:05:3011
8398099445445,0cyclictest69750irq/159-i91519:35:084
839529944521,29cyclictest0-21swapper/520:50:3211
839529944123,415cyclictest0-21swapper/522:46:5411
8394799440439,1cyclictest0-21swapper/419:35:0810
8398599438435,2cyclictest312626-21kworker/u64:8+events_unbound00:00:085
839529943814,29cyclictest0-21swapper/522:13:5011
839369943720,416cyclictest0-21swapper/121:35:081
8398099432432,0cyclictest69750irq/159-i91500:23:084
839579943211,29cyclictest0-21swapper/720:02:0813
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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