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2026-03-12 - 12:22
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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 Thu Mar 12, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35761549910396,5cyclictest3616586-21kworker/u8:0+flush-179:021:20:000
35761549910393,7cyclictest3640741-21latency_hist22:30:010
35761589910191,7cyclictest3588787-21latency_hist19:50:021
3576154999785,9cyclictest3673254-21cp00:10:010
3576154999582,10cyclictest266-21systemd-journal00:25:010
3576154998778,6cyclictest3622976-21latency_hist21:35:000
3576154998478,4cyclictest3602526-21journal-offline20:30:180
3576158997766,8cyclictest3663274-21latency_hist23:40:011
3576158997668,6cyclictest3632532-21latency_hist22:05:001
3576154997568,5cyclictest3659835-21latency_hist23:30:010
3576158997466,6cyclictest3579252-21latency_hist19:20:001
3576158997155,13cyclictest266-21systemd-journal22:00:011
3576158997155,13cyclictest266-21systemd-journal22:00:011
3576154997161,7cyclictest3630929-21latency_hist22:00:020
3576154997161,7cyclictest3630929-21latency_hist22:00:010
3576158997062,5cyclictest3624576-21latency_hist21:40:011
3576158996960,7cyclictest3673141-21latency_hist00:10:001
3576154996861,5cyclictest3585669-21kworker/u8:0+flush-179:020:05:230
3576154996860,6cyclictest3583123-21kworker/u8:1+events_unbound19:35:010
3576154996758,6cyclictest266-21systemd-journal00:04:000
3576158996560,4cyclictest3636749-21kworker/u8:0+events_unbound22:30:001
3576158996533,4cyclictest3595165-21turbostat20:14:551
3576158996456,6cyclictest3661423-21latency_hist23:35:001
3576154996456,6cyclictest3647105-21latency_hist22:50:010
3576158996356,5cyclictest3624838-21apt-get21:40:121
3576158996351,10cyclictest3611337-21latency_hist21:00:021
3576154996252,7cyclictest3669927-40mandb00:00:010
3576158996139,19cyclictest3655311-21apt-get23:15:121
3576154996051,6cyclictest510-21rs:main0
3576158995950,7cyclictest3601562-21kworker/u8:2+events_unbound21:25:011
3576158995947,6cyclictest3601562-21kworker/u8:2+events_unbound21:00:191
3576158995945,11cyclictest266-21systemd-journal22:13:181
3576154995850,6cyclictest266-21systemd-journal19:59:590
3576158995754,2cyclictest3611827-21kworker/u8:1+events_unbound21:15:011
3576158995751,4cyclictest3588823-21kworker/u8:3+events_unbound20:20:251
3576158995748,6cyclictest3663246-21kworker/u8:0+flush-179:000:35:191
3576154995751,4cyclictest3626164-21cron21:45:000
3576154995750,5cyclictest3582421-21latency_hist19:30:020
3576154995649,5cyclictest3637309-21apt-get22:20:030
3576154995647,6cyclictest3585669-21kworker/u8:0+flush-179:019:40:200
3576158995447,5cyclictest3620601-21kworker/u8:1+events_unbound21:30:011
3576158995447,3cyclictest3588823-21kworker/u8:3+flush-179:019:50:211
3576158995423,6cyclictest0-21swapper/119:23:591
3576158995346,5cyclictest3642317-21kworker/u8:1+flush-179:022:35:001
3576158995343,7cyclictest3576031-21latency_hist19:10:021
3576154995348,4cyclictest3636749-21kworker/u8:0+flush-179:022:30:210
3576154995339,6cyclictest3588823-21kworker/u8:3+flush-179:020:15:260
3576159995249,2cyclictest0-21swapper/222:08:592
3576158995246,4cyclictest3663334-21kworker/u8:2+events_unbound00:04:011
3576158995244,6cyclictest3642317-21kworker/u8:1+events_unbound22:45:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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