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2026-05-10 - 06:19
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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 May 10, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32316059911599,12cyclictest3324868-40logrotate00:00:011
32316019910898,7cyclictest3274750-21latency_hist21:25:010
32316059910795,11cyclictest3311693-21kworker/u8:3+events_unbound23:25:251
3231605999989,8cyclictest3334476-21kworker/u8:1+flush-179:000:40:001
3231605999892,4cyclictest3324934-21kworker/u8:2+flush-179:000:03:591
3231605999683,5cyclictest3254009-21kworker/u8:1+events_unbound20:35:231
3231605999587,6cyclictest3309483-21kworker/u8:1+events_unbound23:10:241
3231605999486,7cyclictest3254009-21kworker/u8:1+events_unbound20:20:001
3231605999383,8cyclictest3249027-21apt-get20:05:041
3231605998980,7cyclictest3260384-21kworker/u8:2+events_unbound21:15:001
3231605998878,8cyclictest3231447-21kworker/u8:3+events_unbound19:50:001
3231605998778,6cyclictest3234642-21kworker/u8:0+events_unbound19:20:141
3231605998681,4cyclictest3262042-21kworker/u8:3+events_unbound20:45:241
3231605998680,4cyclictest3266795-21latency_hist21:00:011
3231605998580,4cyclictest3231447-21kworker/u8:3+events_unbound19:30:231
3231605998578,5cyclictest3297272-21kworker/u8:2+events_unbound23:00:011
3231601998576,7cyclictest3269968-21latency_hist21:10:020
3231605998478,4cyclictest3324934-21kworker/u8:2+events_unbound00:25:261
3231605998475,6cyclictest3311589-21kworker/u8:2+events_unbound23:20:021
3231605998376,5cyclictest3297272-21kworker/u8:2+events_unbound22:45:221
3231605998374,6cyclictest3297272-21kworker/u8:2+flush-179:023:00:201
3231605998373,7cyclictest3305315-21kworker/u8:0+events_unbound23:40:171
3231605998278,3cyclictest3260384-21kworker/u8:2+events_unbound20:40:251
3231605998275,5cyclictest3234642-21kworker/u8:0+flush-179:019:20:011
3231605997973,4cyclictest3292489-21kworker/u8:0+events_unbound22:20:141
3231605997973,4cyclictest3244279-21kworker/u8:0+flush-179:020:20:161
3231605997972,5cyclictest3274785-21kworker/u8:3+events_unbound21:40:171
3231605997968,9cyclictest3305315-21kworker/u8:0+flush-179:023:35:011
3231601997867,9cyclictest3260384-21kworker/u8:2+flush-179:020:55:000
3231605997773,3cyclictest3274719-21kworker/u8:2+flush-179:021:30:251
3231605997770,5cyclictest3274719-21kworker/u8:2+flush-179:021:25:191
3231605997768,7cyclictest3311589-21kworker/u8:2+events_unbound23:45:141
3231605997671,4cyclictest3321158-21kworker/u8:3+events_unbound00:10:231
3231605997669,4cyclictest3239437-21kworker/u8:4+events_unbound20:00:141
3231605997669,4cyclictest3239437-21kworker/u8:4+events_unbound20:00:131
3231605997567,7cyclictest3274785-21kworker/u8:3+events_unbound21:50:241
3231605997560,14cyclictest3260384-21kworker/u8:2+flush-179:020:50:261
3231605997469,4cyclictest3323946-21kworker/u8:0+flush-179:000:20:251
3231605997469,4cyclictest3289884-21kworker/u8:1+flush-179:022:10:251
3231605997469,4cyclictest3268914-21kworker/u8:1+flush-179:021:15:271
3231605997466,6cyclictest3292489-21kworker/u8:0+events_unbound22:30:001
3231605997466,5cyclictest3257214-21kworker/u8:0+flush-179:020:30:201
3231605997465,6cyclictest3309483-21kworker/u8:1+events_unbound23:15:181
3231601997465,7cyclictest3310260-21/usr/sbin/munin23:15:230
3231605997369,3cyclictest3274785-21kworker/u8:3+flush-179:021:35:241
3231605997263,6cyclictest3297272-21kworker/u8:2+events_unbound22:35:131
3231605997263,6cyclictest3231447-21kworker/u8:3+events_unbound19:50:191
3231601997263,6cyclictest3308437-21latency_hist23:10:010
3231605997066,3cyclictest3287469-21kworker/u8:3+events_unbound22:05:251
3231601997059,9cyclictest3252697-21apt-get20:15:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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