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2025-12-25 - 04:16
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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 10 highest latencies:
System rack0slot2.osadl.org (updated Thu Dec 25, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
97681325444,7sleep50-21swapper/519:05:325
97702425219,29sleep70-21swapper/719:08:317
97703225141,7sleep60-21swapper/619:08:386
977372994842,5cyclictest1358066-21latency_hist22:24:097
97693524534,8sleep40-21swapper/419:07:164
977367994442,2cyclictest938712-21kworker/u16:1+flush-8:019:14:106
977363994240,2cyclictest1129883-21kworker/u16:2+flush-8:020:29:095
977372993933,5cyclictest1212963-21latency_hist21:09:097
977367993937,2cyclictest938712-21kworker/u16:1+events_unbound19:34:246
977367993937,2cyclictest1309944-21kworker/u16:3+flush-8:023:24:096
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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