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2025-10-06 - 13:25
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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 Mon Oct 06, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
368109826655,7sleep50-21swapper/515:21:475
3690774996260,2cyclictest3743458-21kworker/u16:3+events_unbound16:58:536
369018126049,8sleep40-21swapper/415:22:344
3690778995348,4cyclictest589235-21systemd-journal18:36:397
3690778995347,5cyclictest3733856-21latency_hist15:46:397
369033725320,29sleep70-21swapper/715:24:467
3690778994843,4cyclictest125779-21latency_hist20:16:387
3690768994847,1cyclictest4074225-21kworker/u16:0+flush-8:018:34:104
3690768994543,2cyclictest2986412-21kworker/u16:6+flush-8:015:52:114
3690778994436,7cyclictest3871046-21dnf16:55:387
3690778994436,7cyclictest3871046-21dnf16:55:387
3690778994338,4cyclictest3812343-21latency_hist16:26:407
3690774994038,2cyclictest4063169-21kworker/u16:4+events_unbound18:47:336
3690774994037,2cyclictest3743458-21kworker/u16:3+flush-8:016:31:576
3690774993937,2cyclictest76770-21kworker/u16:3+events_unbound20:24:546
3690774993937,2cyclictest4063169-21kworker/u16:4+events_unbound18:21:416
3690774993937,2cyclictest174970-21kworker/u16:3+events_unbound20:50:346
369024023914,8sleep60-21swapper/615:23:246
3690778993833,4cyclictest4024035-21latency_hist17:46:397
3690774993836,2cyclictest3743458-21kworker/u16:3+events_unbound16:15:596
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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