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2026-05-09 - 03:29
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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 May 09, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
48859799133118,11cyclictest1213033-21systemd-journal00:04:000
48859799111102,6cyclictest529075-21latency_hist21:15:010
4885979910488,12cyclictest1987725-21cups-browsed00:00:000
488597999787,7cyclictest559649-21latency_hist22:50:000
488599999683,11cyclictest585993-21kworker/u8:1+events_unbound00:15:161
488599999586,7cyclictest595537-21latency_hist00:40:001
488599999571,22cyclictest566279-21latency_hist23:10:011
488597999584,8cyclictest1213033-21systemd-journal19:35:130
488599999488,4cyclictest582988-21kworker/u8:4+flush-179:000:04:011
488597999485,6cyclictest538902-21latency_hist21:45:010
488597999383,7cyclictest514236-21latency_hist20:30:010
488599999168,20cyclictest1213033-21systemd-journal19:20:131
488599999081,7cyclictest527492-21latency_hist21:10:021
488599998980,6cyclictest572908-21latency_hist23:30:011
488599998781,4cyclictest491656-21kworker/u8:1+flush-179:019:30:251
488599998376,5cyclictest562173-21kworker/u8:0+flush-179:023:00:161
488597998171,7cyclictest1213033-21systemd-journal20:45:130
488597998171,7cyclictest1213033-21systemd-journal20:45:120
488597997867,9cyclictest580869-21apt-get23:55:010
488599997767,7cyclictest593926-21latency_hist00:35:011
488599997765,10cyclictest522461-21apt-get20:54:591
488599997668,6cyclictest499632-21kworker/u8:1+flush-179:019:55:221
488599997664,10cyclictest493540-21apt-get19:25:111
488599997567,6cyclictest498050-21latency_hist19:40:001
488599997466,6cyclictest587558-21latency_hist00:15:001
488599997464,8cyclictest553538-21apt-get22:30:121
488599997364,7cyclictest509711-21kworker/u8:1+flush-179:020:20:221
488597997362,8cyclictest514282-21kworker/u8:0+flush-179:020:50:150
488599997266,4cyclictest548474-21kworker/u8:0+flush-179:022:25:151
488599997264,6cyclictest519324-21kworker/u8:3+flush-179:021:00:001
488597997263,6cyclictest530701-21latency_hist21:20:000
488597997262,7cyclictest537045-21apt-get21:39:590
488599997165,5cyclictest568468-21kworker/u8:2+flush-179:023:15:211
488599997162,7cyclictest501226-21kworker/u8:2+flush-179:019:50:221
488597997067,2cyclictest0-21swapper/021:26:590
488597997064,4cyclictest714-21Xorg00:30:580
488599996958,9cyclictest564738-21kworker/u8:1+flush-179:023:35:001
488599996956,9cyclictest1213033-21systemd-journal22:40:121
488597996962,5cyclictest546911-21latency_hist22:10:000
488599996762,4cyclictest580324-21kworker/u8:0+events_unbound00:20:231
488599996754,12cyclictest519324-21kworker/u8:3+flush-179:021:00:261
488599996660,4cyclictest504468-21kworker/u8:3+events_unbound20:30:141
488597996658,5cyclictest548474-21kworker/u8:0+flush-179:022:30:220
488599996456,6cyclictest580324-21kworker/u8:0+flush-179:000:05:161
488599996456,6cyclictest580324-21kworker/u8:0+flush-179:000:05:161
488599996455,7cyclictest555105-21/usr/sbin/munin22:35:231
488597996454,8cyclictest569480-21apt-get23:20:010
488603996359,3cyclictest0-21swapper/200:03:592
488599996350,10cyclictest1213033-21systemd-journal21:55:011
488597996354,7cyclictest542075-21latency_hist21:55:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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