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2025-11-21 - 11:14
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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 rack0slot2.osadl.org (updated Fri Nov 21, 2025 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
908815995350,2cyclictest1558838-21kworker/u16:3+flush-8:008:43:366
908819995247,4cyclictest1033988-21latency_hist04:23:377
908819995247,4cyclictest1033988-21latency_hist04:23:377
908815995149,1cyclictest1165059-21kworker/u16:0+flush-8:005:48:366
908819995045,4cyclictest1529284-21latency_hist08:28:377
908819995043,6cyclictest589235-21systemd-journal05:48:377
90829524635,8sleep40-21swapper/403:21:004
908813994240,2cyclictest202842-21kworker/u16:2+events_unbound04:03:375
90837624131,7sleep60-21swapper/603:22:076
14026142410,0sleep71402615-21cat07:23:577
908813994037,2cyclictest1296618-21kworker/u16:4+events_unbound06:58:515
908809994038,2cyclictest1498845-21kworker/u16:1+events_unbound08:14:074
8986012403,31sleep70-21swapper/703:18:397
908809993835,2cyclictest1165059-21kworker/u16:0+flush-8:005:28:534
908819993735,1cyclictest0-21swapper/706:18:557
908813993734,2cyclictest213150-21kworker/u16:3+flush-8:003:43:385
908809993734,2cyclictest1417864-21kworker/u16:4+events_unbound07:33:544
908815993634,2cyclictest1387563-21kworker/u16:2+flush-8:007:34:066
908813993634,2cyclictest1458906-21kworker/u16:4+events_unbound08:03:285
908809993632,3cyclictest1064317-21kworker/u16:5+flush-8:004:58:574
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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