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2026-01-11 - 05:37
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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 Jan 11, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3560272999787,8cyclictest3608490-21latency_hist21:40:011
3560271998982,5cyclictest3571681-21kworker/u8:0+flush-179:019:50:000
3560271998981,6cyclictest3637625-21kworker/u8:1+events_unbound23:15:010
3560271998882,4cyclictest3609170-21kworker/u8:3+flush-179:021:49:550
3560271998472,9cyclictest3566599-21latency_hist19:30:000
3560271998376,4cyclictest3571681-21kworker/u8:0+flush-179:019:54:590
3560271998373,8cyclictest3559385-21kworker/u8:0+flush-179:019:25:000
3560271998373,8cyclictest3559385-21kworker/u8:0+flush-179:019:25:000
3560271998276,4cyclictest3650360-21kworker/u8:0+flush-179:000:00:190
3560271998276,4cyclictest3631323-21kworker/u8:3+events_unbound22:50:250
3560271998276,4cyclictest3563475-21kworker/u8:1+flush-179:019:30:250
3560272998066,10cyclictest3645858-21latency_hist23:35:011
3560271998073,5cyclictest3592291-21kworker/u8:2+events_unbound21:05:250
3560271997973,5cyclictest3645846-21kworker/u8:2+flush-179:023:40:010
3560271997772,3cyclictest3650360-21kworker/u8:0+events_unbound00:10:010
3560271997769,5cyclictest3576450-21kworker/u8:3+flush-179:020:15:010
3560271997668,6cyclictest3618293-21latency_hist22:10:010
3560272997554,19cyclictest3660553-21kworker/u8:1+flush-179:000:35:001
3560272997463,8cyclictest3610323-21/usr/sbin/munin21:45:231
3560271997367,4cyclictest3592291-21kworker/u8:2+flush-179:020:55:150
3560271997365,6cyclictest3650360-21kworker/u8:0+flush-179:000:20:000
3560271997266,4cyclictest3574838-21kworker/u8:1+events_unbound20:20:250
3560272997161,7cyclictest3585951-21latency_hist20:30:021
3560271997165,4cyclictest3621426-21kworker/u8:2+events_unbound22:25:010
3560271997160,8cyclictest266-21systemd-journal21:35:000
3560272997060,8cyclictest3602144-21latency_hist21:20:021
3560272996960,6cyclictest3652482-21latency_hist23:55:011
3560271996957,8cyclictest3621426-21kworker/u8:2+flush-179:022:40:210
3560271996863,4cyclictest3592291-21kworker/u8:2+flush-179:021:30:000
3560271996761,4cyclictest3621426-21kworker/u8:2+events_unbound22:45:240
3560271996658,6cyclictest3611715-21kworker/u8:1+flush-179:022:05:000
3560271996560,3cyclictest3597080-21kworker/u8:0+events_unbound21:05:000
3560275996433,2cyclictest0-21swapper/200:27:582
3560272996454,7cyclictest3579587-21latency_hist20:10:021
3560271996458,4cyclictest3597080-21kworker/u8:0+flush-179:021:15:200
3560271996456,6cyclictest3649311-21latency_hist23:45:000
3560272996354,7cyclictest3566603-21apt-get19:30:001
3560271996357,4cyclictest3608463-21kworker/u8:0+events_unbound22:10:130
3560272996256,4cyclictest3559385-21kworker/u8:0+flush-179:019:20:241
3560272996256,4cyclictest3559385-21kworker/u8:0+flush-179:019:20:231
3560271996257,4cyclictest3587534-21kworker/u8:0+flush-179:020:44:550
3560271996256,4cyclictest3650930-21kworker/u8:3+flush-179:000:15:010
3560271996254,6cyclictest3644251-21kworker/u8:1+flush-179:023:30:000
3560271996253,7cyclictest3592315-21latency_hist20:50:010
3560272996153,6cyclictest3610086-21latency_hist21:45:011
3560271996151,7cyclictest3559385-21kworker/u8:0+events_unbound19:15:180
3560271996054,4cyclictest3592291-21kworker/u8:2+flush-179:021:20:260
3560271996054,4cyclictest3592291-21kworker/u8:2+flush-179:021:20:260
3560271996050,7cyclictest3608463-21kworker/u8:0+flush-179:022:15:150
3560271995854,3cyclictest3576450-21kworker/u8:3+flush-179:020:30:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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