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2025-11-23 - 21:22
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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 Sun Nov 23, 2025 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
373375998983,5cyclictest381276-21kworker/u8:3+flush-179:007:40:011
373373998776,8cyclictest502-21rs:main0
373373998676,7cyclictest384506-21latency_hist07:45:010
373373998476,6cyclictest418686-21latency_hist09:30:010
373375998176,3cyclictest441728-21kworker/u8:0+flush-179:010:55:001
373375998174,5cyclictest359298-21kworker/u8:1+events_unbound07:25:231
373375997969,7cyclictest441484-21latency_hist10:40:001
373373997765,8cyclictest400682-21apt-get08:35:000
373375997670,4cyclictest428278-21kworker/u8:3+flush-179:010:25:261
373375997666,8cyclictest430071-21/usr/sbin/munin10:05:221
373375997666,7cyclictest462168-21latency_hist11:45:011
373375997643,30cyclictest0-21swapper/108:12:001
373375997467,5cyclictest372023-21kworker/u8:2+flush-179:007:10:171
373375997365,6cyclictest449486-21kworker/u8:2+events_unbound11:15:261
373375997364,6cyclictest372023-21kworker/u8:2+flush-179:007:30:211
373375997268,3cyclictest462215-21kworker/u8:2+flush-179:012:00:241
373373997262,7cyclictest454215-21latency_hist11:20:010
373375997164,5cyclictest390338-21kworker/u8:2+events_unbound08:20:001
373375997157,10cyclictest400666-21latency_hist08:35:001
373375997061,7cyclictest414147-21/usr/sbin/munin09:15:251
373375996961,6cyclictest439611-21kworker/u8:2+flush-179:010:45:161
373375996961,6cyclictest387912-21/usr/sbin/munin07:55:261
373375996961,5cyclictest405993-21kworker/u8:3+flush-179:009:05:211
373375996860,6cyclictest405993-21kworker/u8:3+flush-179:009:00:011
373375996859,7cyclictest406200-21/usr/sbin/munin08:50:221
373373996858,7cyclictest415506-21latency_hist09:20:000
373373996857,9cyclictest379648-21apt-get07:26:430
37338099660,63cyclictest0-21swapper/311:56:593
373375996655,9cyclictest470378-21apt-get12:10:141
373375996559,4cyclictest446086-21kworker/u8:1+flush-179:010:55:231
373375996559,4cyclictest405993-21kworker/u8:3+flush-179:009:00:161
373373996563,1cyclictest0-21swapper/009:08:590
373373996458,4cyclictest452452-21kworker/u8:0+flush-179:011:35:260
373373996359,2cyclictest723-21Xorg10:07:590
373373996354,7cyclictest468770-21/usr/sbin/munin12:05:240
373375996251,8cyclictest476998-21apt-get12:30:141
373373996253,7cyclictest405959-21latency_hist08:50:010
373373996253,7cyclictest405959-21latency_hist08:50:010
373375996155,4cyclictest384348-21kworker/u8:1+flush-179:007:45:221
373373996151,7cyclictest413907-21latency_hist09:15:010
373375996055,4cyclictest427305-21kworker/u8:1+events_unbound10:10:241
373375996053,5cyclictest390338-21kworker/u8:2+flush-179:008:20:231
373375996052,6cyclictest449486-21kworker/u8:2+events_unbound11:20:241
373373996056,3cyclictest723-21Xorg11:56:590
373373996053,5cyclictest395649-21latency_hist08:20:010
373373996048,8cyclictest471702-21latency_hist12:15:010
373375995954,4cyclictest462198-21kworker/u8:1+flush-179:012:05:221
373375995953,4cyclictest418721-21kworker/u8:2+flush-179:010:00:151
373375995947,9cyclictest271-21systemd-journal12:00:001
373375995853,4cyclictest386070-21kworker/u8:0+flush-179:007:54:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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