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2026-04-25 - 09:26
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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 Apr 25, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36816289911282,20cyclictest3757140-21latency_hist23:05:011
368162899111101,7cyclictest1213033-21systemd-journal00:40:011
36816289910695,8cyclictest1213033-21systemd-journal23:05:221
36816239910290,10cyclictest3718173-21latency_hist21:05:010
3681628999770,24cyclictest3774902-21/usr/sbin/munin00:00:221
3681623999384,7cyclictest3732748-21latency_hist21:50:010
3681623999281,9cyclictest3779470-21apt-get00:15:020
3681623998981,6cyclictest3700664-21latency_hist20:10:010
3681628998779,6cyclictest3745997-21latency_hist22:30:011
3681628998477,5cyclictest3742825-21latency_hist22:20:011
3681628998476,6cyclictest3732783-21kworker/u8:3+flush-179:021:50:261
3681628997766,9cyclictest3731417-21apt-get21:45:131
3681628997466,6cyclictest3708618-21latency_hist20:35:011
3681628997465,7cyclictest3774666-40mandb00:00:011
3681628997465,7cyclictest3774666-40mandb00:00:001
3681628997464,8cyclictest3734587-21apt-get21:55:121
3681628997463,8cyclictest3753945-21latency_hist22:55:011
3681628997363,8cyclictest3766914-21/usr/sbin/munin23:35:221
368162899731,66cyclictest1-21systemd19:40:011
3681628997164,5cyclictest3760546-21/usr/sbin/munin23:15:241
3681628997164,5cyclictest3760546-21/usr/sbin/munin23:15:241
3681628996960,7cyclictest3716823-21/usr/sbin/munin21:00:231
3681623996857,9cyclictest1213033-21systemd-journal19:40:000
3681623996758,7cyclictest3743081-21apt-get22:20:110
3681623996758,7cyclictest3743081-21apt-get22:20:110
3681623996757,7cyclictest1213033-21systemd-journal21:05:020
3681623996655,9cyclictest3715234-21apt-get20:55:120
3681628996559,4cyclictest3703850-21latency_hist20:20:001
3681628996457,5cyclictest1213033-21systemd-journal19:50:011
3681628996456,7cyclictest3701708-21kworker/u8:0+events_unbound21:00:001
4577091630,18ptp4l61490irq/134-eno1-TxRx-019:06:223
3681623996358,3cyclictest3773038-21latency_hist23:55:010
3681623996352,9cyclictest3737537-21apt-get22:05:000
3681628996251,9cyclictest3688138-21apt-get19:30:111
3681628996151,8cyclictest3765346-21apt-get23:30:101
3681623996153,6cyclictest3755808-21apt-get23:00:120
3681623996151,8cyclictest3768539-21apt-get23:40:110
3681628996052,6cyclictest3754183-21/usr/sbin/munin22:55:221
3681628996051,6cyclictest1213033-21systemd-journal21:27:231
368162899601,40cyclictest1-21systemd22:13:231
368162899591,51cyclictest0-21swapper/100:10:121
3681628995851,5cyclictest3699114-21kworker/u8:3+events_unbound20:05:241
368162899581,37cyclictest714-21Xorg00:17:591
3681623995851,5cyclictest3749427-21kworker/u8:1+events_unbound22:40:240
3681628995750,6cyclictest3694287-21kworker/u8:1+flush-179:019:55:011
3681623995740,14cyclictest3713395-21latency_hist20:50:010
231999570,6rtkit-daemon2318-21rtkit-daemon19:15:140
3681628995650,4cyclictest3769903-21kworker/u8:3+flush-179:000:25:251
3681628995649,5cyclictest3769903-21kworker/u8:3+flush-179:023:45:211
3681628995635,19cyclictest3686327-21systemd-run19:25:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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