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2025-12-14 - 08:35
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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 rackeslot6.osadl.org (updated Sun Dec 14, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41871109911086,20cyclictest41386-21latency_hist21:40:011
4187112999056,32cyclictest0-21swapper/200:20:592
4187107998447,34cyclictest714-21Xorg00:20:590
4187107998172,7cyclictest49611-21latency_hist22:05:010
4187107997870,6cyclictest83817-21latency_hist23:50:010
4187107997671,4cyclictest2961779-21kworker/u8:2+flush-179:019:15:360
4187107997666,7cyclictest23616-21latency_hist20:45:010
4187107997468,4cyclictest56016-21kworker/u8:3+events_unbound22:55:250
4187110997367,4cyclictest22049-21kworker/u8:2+flush-179:020:45:261
4187107997165,4cyclictest56016-21kworker/u8:3+flush-179:023:20:000
4187107997164,4cyclictest87064-21kworker/u8:1+events_unbound00:04:000
4187107996963,5cyclictest56016-21kworker/u8:3+flush-179:023:30:000
4187107996863,4cyclictest36587-21kworker/u8:1+events_unbound22:20:260
4187107996863,4cyclictest36587-21kworker/u8:1+events_unbound22:20:250
4187110996755,10cyclictest77990-21diskstats23:30:141
4187110996660,4cyclictest36587-21kworker/u8:1+flush-179:021:50:001
4187107996661,4cyclictest41428-21kworker/u8:3+events_unbound21:45:250
4187107996659,5cyclictest27024-21kworker/u8:0+events_unbound21:00:150
4187107996561,3cyclictest4188626-21kworker/u8:4+flush-179:019:50:260
4187107996357,4cyclictest56016-21kworker/u8:3+flush-179:022:30:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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