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2026-08-31 - 00:10
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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 Sun Aug 30, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
319914999143123,13cyclictest1213033-21systemd-journal10:15:140
319914999140103,24cyclictest3211794-21latency_hist07:50:010
319915399137128,7cyclictest3277248-21kworker/u8:1+events_unbound11:20:011
319914999135128,5cyclictest3214943-21kworker/u8:0+flush-179:008:00:010
319915399130119,8cyclictest3227724-21latency_hist08:40:011
319914999130118,8cyclictest3199013-21latency_hist07:10:020
319915399127112,12cyclictest1213033-21systemd-journal11:10:011
319914999126114,9cyclictest3291586-21latency_hist11:55:010
319914999125115,7cyclictest3222943-21latency_hist08:25:010
319914999124113,8cyclictest3290001-21latency_hist11:50:010
319914999123114,7cyclictest3293150-21kworker/u8:1+events_unbound12:20:020
319914999123112,9cyclictest3294783-21latency_hist12:05:000
319914999120110,7cyclictest3245993-21latency_hist09:35:010
319915399119109,7cyclictest3235936-21latency_hist09:05:001
319915399119108,8cyclictest3301405-21latency_hist12:25:011
319915399118104,11cyclictest3254223-21latency_hist10:00:021
319915399116108,6cyclictest3265868-21latency_hist10:35:011
319914999115104,7cyclictest1-21systemd11:45:000
31991499911097,10cyclictest1213033-21systemd-journal08:30:140
319914999110103,5cyclictest3277248-21kworker/u8:1+flush-179:011:20:150
31991539910898,7cyclictest3254684-21cat10:00:021
31991539910494,8cyclictest3248115-21apt-get09:40:131
31991499910492,10cyclictest1213033-21systemd-journal07:20:000
31991499910393,8cyclictest3251289-21kworker/u8:1+flush-179:009:50:160
31991499910296,4cyclictest3283674-21kworker/u8:3+flush-179:012:15:250
3199153999988,8cyclictest3299546-21apt-get12:20:001
3199149999991,7cyclictest3282086-21kworker/u8:2+flush-179:011:30:010
3199149999790,5cyclictest3293150-21kworker/u8:1+flush-179:012:10:160
3199149999789,6cyclictest3264333-21kworker/u8:3+events_unbound10:45:000
3199149999786,9cyclictest3277267-21apt-get11:10:130
3199153999585,8cyclictest3205408-21latency_hist07:30:011
3199153999585,7cyclictest3227696-21kworker/u8:0+flush-179:008:45:201
3199149999587,7cyclictest3202856-21kworker/u8:1+flush-179:007:55:000
3199149999585,8cyclictest3262950-21apt-get10:25:120
3199153999487,5cyclictest3230362-21kworker/u8:2+events_unbound09:35:011
3199153999487,5cyclictest3182629-21kworker/u8:0+flush-179:007:10:231
3199149999488,4cyclictest3220794-21kworker/u8:1+flush-179:008:40:170
3199153999384,6cyclictest3285226-21latency_hist11:35:011
3199153999381,9cyclictest1213033-21systemd-journal11:45:001
3199149999386,5cyclictest3213357-21kworker/u8:2+flush-179:008:10:220
3199149999385,6cyclictest3283674-21kworker/u8:3+flush-179:012:05:140
3199153999282,7cyclictest3273803-21kworker/u8:0+flush-179:011:00:221
3199149999285,5cyclictest3277248-21kworker/u8:1+flush-179:011:15:170
3199153999184,5cyclictest3222919-21kworker/u8:2+flush-179:008:30:221
3199153999182,7cyclictest3202856-21kworker/u8:1+flush-179:007:45:271
3199153999182,6cyclictest3288450-21kworker/u8:0+flush-179:011:50:221
3199149999185,4cyclictest3293150-21kworker/u8:1+events_unbound12:35:250
3199153998981,6cyclictest3182629-21kworker/u8:0+flush-179:007:50:201
3199153998980,7cyclictest3230362-21kworker/u8:2+flush-179:009:15:151
3199153998973,14cyclictest3220794-21kworker/u8:1+flush-179:008:20:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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