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2026-05-12 - 13:54
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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 Tue May 12, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40237399113101,8cyclictest454179-21kworker/u8:2+flush-179:021:55:011
4023739910795,8cyclictest414978-21latency_hist19:50:021
4023739910195,4cyclictest495879-21kworker/u8:2+flush-179:000:03:591
402373999571,16cyclictest462171-21kworker/u8:1+flush-179:022:25:261
40236999931,89cyclictest501-21systemd-logind00:04:000
402373998978,9cyclictest459234-21apt-get22:05:111
40236999891,83cyclictest438078-21munin-run21:00:010
402369998879,7cyclictest455829-21kworker/u8:0+flush-179:022:25:010
402369998676,7cyclictest457386-21latency_hist22:00:000
402373998576,6cyclictest413390-21latency_hist19:45:011
402373998575,7cyclictest505693-21latency_hist00:30:011
402373998474,7cyclictest405429-21latency_hist19:20:001
402373998470,12cyclictest441222-21apt-get21:09:591
402369998474,7cyclictest449424-21latency_hist21:35:010
402369998474,7cyclictest449424-21latency_hist21:35:000
402369998277,3cyclictest408577-21kworker/u8:1+flush-179:019:45:160
402369998276,4cyclictest408577-21kworker/u8:1+flush-179:019:35:010
402369998275,5cyclictest412470-21kworker/u8:0+flush-179:020:05:170
402369998175,4cyclictest389072-21kworker/u8:2+flush-179:019:25:170
402369998173,6cyclictest495815-40logrotate00:00:010
402373998069,9cyclictest451285-21apt-get21:40:141
402369997971,6cyclictest510-21rs:main0
402369997872,4cyclictest431635-21kworker/u8:1+flush-179:020:50:000
402369997772,4cyclictest419732-21kworker/u8:1+events_unbound20:19:590
402369997460,11cyclictest1213033-21systemd-journal00:20:020
402369997367,5cyclictest449407-21kworker/u8:3+flush-179:021:45:220
402369997366,5cyclictest458979-21latency_hist22:05:000
402369997365,6cyclictest428241-21apt-get20:30:010
402369997266,4cyclictest491037-21kworker/u8:2+flush-179:023:45:170
402373997060,7cyclictest433242-21kworker/u8:2+flush-179:021:25:171
402373997053,16cyclictest0-21swapper/119:58:001
402369997063,5cyclictest434883-21kworker/u8:0+flush-179:021:05:160
402369996962,5cyclictest486061-21kworker/u8:1+events_unbound23:40:010
402369996962,4cyclictest471945-21kworker/u8:2+events_unbound22:55:160
402373996861,5cyclictest495879-21kworker/u8:2+flush-179:000:05:271
402373996859,6cyclictest389072-21kworker/u8:2+flush-179:019:10:241
402373996857,9cyclictest428739-21apt-get20:30:121
402369996760,5cyclictest428203-21kworker/u8:0+events_unbound20:35:010
402369996660,4cyclictest389072-21kworker/u8:2+flush-179:019:10:210
402373996556,6cyclictest473294-21latency_hist22:50:011
402369996559,4cyclictest486061-21kworker/u8:1+flush-179:023:30:140
402369996557,6cyclictest502242-21latency_hist00:20:010
402369996458,4cyclictest443098-21kworker/u8:1+flush-179:021:50:150
402373996353,7cyclictest452851-21/usr/sbin/munin21:45:251
402369996353,8cyclictest444919-21apt-get21:20:130
402369996256,4cyclictest412470-21kworker/u8:0+flush-179:019:40:210
402369996255,5cyclictest462171-21kworker/u8:1+flush-179:022:40:160
402369996253,7cyclictest460565-21latency_hist22:10:020
402373996149,9cyclictest423440-21apt-get20:15:141
402369996156,4cyclictest433242-21kworker/u8:2+flush-179:021:35:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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