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2026-08-29 - 07:02
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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 Sat Aug 29, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
332736299139130,7cyclictest1213033-21systemd-journal23:30:001
332736299133124,7cyclictest3368876-21latency_hist21:20:011
332736099122113,7cyclictest3376813-21kworker/u8:0+events_unbound22:00:000
332736099121108,10cyclictest3420086-40mandb00:00:020
332736299119107,9cyclictest1213033-21systemd-journal23:40:011
332736099119105,11cyclictest3380016-21apt-get21:55:000
332736299116105,8cyclictest3386630-21latency_hist22:15:011
332736099115108,4cyclictest3352956-21latency_hist20:30:000
332736299110100,7cyclictest3420165-21cat00:00:021
33273629910897,9cyclictest3415290-21latency_hist23:45:011
33273629910796,8cyclictest3343398-21latency_hist20:00:021
332736099106100,4cyclictest3420131-21kworker/u8:1+flush-179:000:04:000
332736099106100,4cyclictest3339999-21kworker/u8:3+flush-179:019:50:240
33273629910595,8cyclictest3388242-21latency_hist22:20:011
33273609910597,4cyclictest3344967-21kworker/u8:0+flush-179:020:10:010
33273609910389,10cyclictest3416334-21kworker/u8:0+flush-179:000:15:010
33273629910297,4cyclictest3325687-21kworker/u8:0+flush-179:019:10:371
33273629910294,6cyclictest3360908-21latency_hist20:55:001
33273629910292,7cyclictest3400970-21latency_hist23:00:011
33273609910196,3cyclictest3416334-21kworker/u8:0+flush-179:000:20:150
33273609910189,9cyclictest3420131-21kworker/u8:1+flush-179:000:10:000
33273629910092,5cyclictest3404144-21latency_hist23:10:011
33273609910087,8cyclictest3378455-21kworker/u8:3+flush-179:022:00:210
3327362999994,4cyclictest3335165-21kworker/u8:3+events_unbound19:39:551
3327360999892,4cyclictest3378455-21kworker/u8:3+flush-179:022:05:170
3327360999883,7cyclictest3325687-21kworker/u8:0+events_unbound19:25:000
3327362999787,8cyclictest3430183-21apt-get00:30:101
3327360999687,6cyclictest3338353-21kworker/u8:1+flush-179:019:55:200
3327360999687,5cyclictest3416334-21kworker/u8:0+flush-179:000:20:010
3327360999685,8cyclictest3327203-21latency_hist19:10:010
3327360999685,7cyclictest3361929-21kworker/u8:1+events_unbound21:00:000
3327360999589,4cyclictest3387294-21kworker/u8:1+flush-179:022:45:240
3327360999585,7cyclictest3333596-21latency_hist19:30:010
3327360999488,4cyclictest3376813-21kworker/u8:0+flush-179:022:40:210
3327360999484,6cyclictest3368928-21kworker/u8:2+flush-179:021:30:140
3327360999378,9cyclictest3402533-21kworker/u8:2+flush-179:023:05:170
3327360999378,12cyclictest3359307-21kworker/u8:2+flush-179:020:50:010
3327360999376,5cyclictest3416334-21kworker/u8:0+events_unbound23:50:230
3327360999285,5cyclictest3387294-21kworker/u8:1+flush-179:022:20:160
3327362999185,4cyclictest3425396-21apt-get00:15:111
3327360999186,4cyclictest3332246-21kworker/u8:1+flush-179:019:30:170
3327360999185,4cyclictest3325687-21kworker/u8:0+events_unbound19:10:340
3327360999182,6cyclictest3387294-21kworker/u8:1+events_unbound22:25:150
3327360999083,5cyclictest3406716-21kworker/u8:0+flush-179:023:15:220
3327360999082,5cyclictest3376813-21kworker/u8:0+flush-179:022:15:160
3327360998983,4cyclictest3420131-21kworker/u8:1+flush-179:000:25:230
3327360998978,7cyclictest3420131-21kworker/u8:1+flush-179:000:30:200
3327362998883,4cyclictest3376813-21kworker/u8:0+events_unbound22:29:571
3327362998876,10cyclictest3427005-21apt-get00:20:111
3327360998882,4cyclictest3387294-21kworker/u8:1+flush-179:022:35:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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