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2026-05-07 - 10:26
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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 rackeslot6.osadl.org (updated Thu May 07, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33453599911298,13cyclictest3429690-21kworker/u8:0+flush-179:000:00:011
3345359999683,9cyclictest1213033-21systemd-journal21:35:011
3345359998981,6cyclictest3432891-21latency_hist23:40:001
3345357998875,9cyclictest3361519-21http19:59:590
3345357998779,5cyclictest1-21systemd23:10:000
3345359998677,6cyclictest3418296-21latency_hist22:55:011
3345359998478,5cyclictest3445650-21kworker/u8:3+flush-179:000:30:001
3345357998478,4cyclictest3403971-21latency_hist22:10:010
3345357998274,5cyclictest3447291-21latency_hist00:25:000
3345359998075,4cyclictest3347764-21kworker/u8:0+events_unbound19:20:011
3345359997773,3cyclictest3439308-21kworker/u8:2+events_unbound00:04:001
3345359997770,6cyclictest3381219-21kworker/u8:0+flush-179:021:00:001
3345359997566,5cyclictest3415161-21kworker/u8:3+flush-179:023:20:251
3345359997467,5cyclictest3403961-21kworker/u8:3+events_unbound22:15:141
3345359997467,5cyclictest3395686-21kworker/u8:0+flush-179:021:50:221
3345359997467,5cyclictest3358329-21kworker/u8:2+events_unbound20:29:591
3345357997466,6cyclictest1213033-21systemd-journal22:20:000
3345359997266,5cyclictest3343804-21kworker/u8:3+events_unbound20:25:001
3345359997266,4cyclictest3429743-21kworker/u8:1+events_unbound00:35:141
3345359997165,4cyclictest3429690-21kworker/u8:0+flush-179:000:20:011
3345359997165,4cyclictest3429690-21kworker/u8:0+flush-179:000:20:011
3345357997159,10cyclictest3398885-21apt-get21:55:010
3345359997063,5cyclictest3403961-21kworker/u8:3+flush-179:022:15:001
3345359997054,14cyclictest3373110-21kworker/u8:1+flush-179:020:40:191
3345359996962,5cyclictest3411915-21kworker/u8:1+flush-179:023:20:001
3345359996957,4cyclictest3373110-21kworker/u8:1+flush-179:020:55:011
3345357996960,6cyclictest3347764-21kworker/u8:0+flush-179:019:20:180
3345357996958,9cyclictest3387999-21apt-get21:20:110
3345357996958,8cyclictest3435032-21diskstats23:45:140
3345357996958,8cyclictest1213033-21systemd-journal00:10:000
3345359996863,4cyclictest3429690-21kworker/u8:0+flush-179:023:54:551
3345359996758,6cyclictest3397286-21latency_hist21:50:011
3345359996755,9cyclictest3398862-21kworker/u8:2+flush-179:022:40:011
3345359996661,4cyclictest3343804-21kworker/u8:3+flush-179:019:20:231
3345359996657,6cyclictest3361441-21kworker/u8:0+flush-179:020:05:151
3345357996655,9cyclictest3358549-21apt-get19:50:090
334536599650,1cyclictest0-21swapper/323:43:593
3345359996559,4cyclictest3411915-21kworker/u8:1+flush-179:022:55:151
3345359996559,4cyclictest3387980-21kworker/u8:1+flush-179:021:25:221
3345359996556,6cyclictest3351649-21kworker/u8:0+flush-179:019:30:211
3345357996555,7cyclictest3428356-21/usr/sbin/munin23:25:180
3345359996459,3cyclictest3358329-21kworker/u8:2+flush-179:020:30:151
3345359996357,4cyclictest3343804-21kworker/u8:3+flush-179:019:10:211
3345359996355,5cyclictest3429743-21kworker/u8:1+flush-179:000:10:201
3345359996355,5cyclictest3398862-21kworker/u8:2+flush-179:022:30:201
3345357996343,17cyclictest1213033-21systemd-journal21:41:510
334536199620,60cyclictest0-21swapper/200:24:592
3345359996257,3cyclictest3351714-21kworker/u8:2+events_unbound19:35:241
3345359996253,6cyclictest3429690-21kworker/u8:0+events_unbound00:05:151
3345359996156,3cyclictest3381409-21kworker/u8:3+events_unbound21:05:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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