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2026-03-15 - 05:03
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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 Mar 15, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35547419910989,17cyclictest3578775-21latency_hist20:25:010
35547429910691,11cyclictest3617762-21latency_hist22:25:011
3554742999692,3cyclictest3635574-21kworker/u8:0+events_unbound00:04:011
3554742999581,11cyclictest3611134-21latency_hist22:05:011
3554742999085,4cyclictest3627595-21kworker/u8:1+events_unbound23:15:291
3554742998681,4cyclictest3656386-21kworker/u8:2+events_unbound00:35:221
3554742998681,4cyclictest3591816-21kworker/u8:0+events_unbound21:35:231
3554741998174,5cyclictest3590421-21/usr/sbin/munin21:00:240
3554742998071,7cyclictest266-21systemd-journal23:15:001
3554741998068,9cyclictest3557823-21apt-get19:20:010
3554741997968,8cyclictest266-21systemd-journal23:55:000
3554742997874,3cyclictest3656332-21kworker/u8:1+events_unbound00:25:211
3554742997770,5cyclictest3633917-21kworker/u8:2+flush-179:023:25:561
3554741997667,7cyclictest3648309-40logrotate00:00:020
3554742997566,6cyclictest3621196-21latency_hist22:35:011
3554742997463,9cyclictest266-21systemd-journal23:25:001
355474199721,69cyclictest211irq_work/000:14:000
3554742997166,4cyclictest3635574-21kworker/u8:0+flush-179:023:54:561
3554742996959,7cyclictest3564453-21latency_hist19:40:011
3554742996763,3cyclictest3567588-21kworker/u8:3+events_unbound19:46:211
3554741996761,4cyclictest3590153-21kworker/u8:2+flush-179:021:10:240
3554742996558,5cyclictest3578819-21kworker/u8:3+events_unbound20:25:141
3554741996550,13cyclictest266-21systemd-journal22:30:000
3554741996455,7cyclictest3566039-21latency_hist19:45:010
3554742996258,3cyclictest3638744-21kworker/u8:3+events_unbound23:30:221
3554742996254,6cyclictest3578819-21kworker/u8:3+flush-179:020:35:151
3554741996154,5cyclictest3643583-21systemd-run23:45:000
3554742996056,3cyclictest3591816-21kworker/u8:0+events_unbound21:25:261
3554742996055,4cyclictest3635574-21kworker/u8:0+events_unbound00:11:191
3554742996051,3cyclictest3591816-21kworker/u8:0+events_unbound21:57:201
3554742996044,14cyclictest3569243-21kworker/u8:1+flush-179:020:10:001
3554742995955,3cyclictest3645166-21kworker/u8:3+events_unbound00:07:541
3554742995950,7cyclictest3624388-21latency_hist22:45:021
3554742995854,3cyclictest3633917-21kworker/u8:2+events_unbound23:37:491
3554742995854,3cyclictest3578819-21kworker/u8:3+events_unbound21:05:171
3554742995854,3cyclictest3578819-21kworker/u8:3+events_unbound20:57:291
3554742995854,3cyclictest3556193-21kworker/u8:1+events_unbound19:17:171
3554742995853,4cyclictest3558318-21kworker/u8:0+events_unbound19:54:191
3554742995853,4cyclictest3558318-21kworker/u8:0+events_unbound19:43:191
3554742995849,7cyclictest3619608-21latency_hist22:30:001
3554741995852,4cyclictest3629424-21apt-get23:00:120
3554741995852,4cyclictest3591816-21kworker/u8:0+flush-179:021:44:560
3554741995848,8cyclictest3638710-21apt-get23:25:560
3554741995847,8cyclictest266-21systemd-journal20:10:010
3554741995846,9cyclictest3557823-21apt-get19:20:000
3554742995752,4cyclictest3614547-21kworker/u8:2+events_unbound22:15:241
3554742995752,4cyclictest3558318-21kworker/u8:0+events_unbound20:10:241
3554742995651,4cyclictest3591816-21kworker/u8:0+events_unbound21:50:171
3554742995550,4cyclictest3591816-21kworker/u8:0+events_unbound21:46:201
3554742995549,5cyclictest3635574-21kworker/u8:0+flush-179:023:45:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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