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2026-04-22 - 02:04
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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 50 highest latencies:
System rack0slot2.osadl.org (updated Wed Apr 22, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30951712950,1sleep73095172-21rm21:30:457
33155742920,1sleep70-21swapper/723:04:457
31287432540,0sleep60-21swapper/621:44:546
2803034994943,5cyclictest3121356-21latency_hist21:44:327
280260624434,7sleep50-21swapper/519:07:255
28025242411,35sleep70-21swapper/719:06:157
280274723222,7sleep40-21swapper/419:09:254
280274023019,8sleep60-21swapper/619:09:196
2803034992928,0cyclictest0-21swapper/719:59:497
2803034992716,9cyclictest635-21systemd-journal23:59:307
2803033992422,2cyclictest3387383-21kworker/u16:3+flush-8:000:20:286
2803024992420,3cyclictest3336695-21kworker/u16:0+flush-8:023:54:324
2803034992320,2cyclictest3458230-21sh00:01:077
2803034992320,2cyclictest3458230-21sh00:01:077
280303499220,20cyclictest3423825-21latency_hist23:49:317
2803033992220,2cyclictest3375656-21kworker/u16:2+events_unbound23:35:056
2803033992220,2cyclictest2719700-21kworker/u16:1+events_unbound19:19:376
2803024992220,2cyclictest3448385-21kworker/u16:1+events_unbound00:02:484
2803024992220,2cyclictest3448385-21kworker/u16:1+events_unbound00:02:484
2803024992219,2cyclictest2864373-21kworker/u16:3+flush-8:019:49:374
2803033992119,2cyclictest2999496-21kworker/u16:3+events_unbound21:25:016
2803033992119,2cyclictest2950413-21kworker/u16:4+flush-8:021:19:566
2803033992119,2cyclictest2864373-21kworker/u16:3+events_unbound20:09:456
2803034992016,3cyclictest1234-21snmpd00:11:437
280303499200,18cyclictest3472301-21cat00:09:317
2803033992018,2cyclictest3469792-21kworker/u16:0+flush-8:000:35:006
2803033992018,2cyclictest2719700-21kworker/u16:1+events_unbound19:14:346
2803034991913,5cyclictest3145561-21latency_hist21:54:317
2803033991917,2cyclictest3314730-21kworker/u16:4+events_unbound23:24:456
2803033991917,2cyclictest3058550-21kworker/u16:0+flush-8:022:14:466
2803034991815,2cyclictest1234-21snmpd22:49:147
2803034991814,3cyclictest1234-21snmpd22:59:147
2803034991813,4cyclictest3375233-21latency_hist23:29:317
280303499180,1cyclictest0-21swapper/720:09:557
2803033991816,2cyclictest2774584-21kworker/u16:2+events_unbound19:44:546
2803033991816,2cyclictest2719700-21kworker/u16:1+events_unbound19:25:256
2803024991815,2cyclictest3519644-21kworker/u16:1+flush-8:000:29:514
2803024991814,3cyclictest3194147-21kworker/u16:1+flush-8:023:14:494
280303499179,7cyclictest6895-21gmain19:44:567
2803034991715,1cyclictest0-21swapper/723:39:497
2803034991713,3cyclictest1234-21snmpd19:26:427
2803034991712,4cyclictest3218061-21latency_hist22:24:327
280303499170,1cyclictest0-21swapper/719:34:557
280303499170,15cyclictest3254339-21latency_hist22:39:317
2803033991715,2cyclictest3469792-21kworker/u16:0+flush-8:000:14:476
2803033991715,2cyclictest3112133-21kworker/u16:2+events_unbound21:39:506
2803033991715,2cyclictest3058550-21kworker/u16:0+events_unbound21:35:136
2803033991715,2cyclictest3058550-21kworker/u16:0+events_unbound21:29:456
2803033991715,2cyclictest2950413-21kworker/u16:4+flush-8:021:10:006
2803029991714,3cyclictest3469792-21kworker/u16:0+flush-8:000:09:315
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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