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2026-05-05 - 13:18
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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 05, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
200293499111101,7cyclictest2046431-21latency_hist21:25:010
20029399910698,6cyclictest2020386-21kworker/u8:2+flush-179:020:15:011
20029399910189,10cyclictest2072419-21apt-get22:45:031
2002939999873,22cyclictest2096563-40mandb00:00:011
2002934998983,4cyclictest1988426-21kworker/u8:2+flush-179:019:35:010
2002934998977,9cyclictest1213033-21systemd-journal21:55:210
2002934998574,9cyclictest2080853-21/usr/sbin/munin23:10:230
2002939998462,6cyclictest2064714-21apt-get22:20:131
2002939998375,6cyclictest2075846-21latency_hist22:55:021
2002939998372,9cyclictest2081280-21kworker/u8:3+flush-179:023:40:011
2002934998373,7cyclictest2044839-21latency_hist21:20:020
2002939997973,4cyclictest2102810-21kworker/u8:1+flush-179:000:20:211
2002934997971,6cyclictest2014040-21latency_hist19:45:010
2002939997769,6cyclictest2101353-21latency_hist00:15:011
2002934997770,5cyclictest2031848-21latency_hist20:40:010
2002934997669,5cyclictest2014027-21kworker/u8:3+flush-179:019:50:000
2002934997464,8cyclictest2020420-21apt-get20:04:560
2002939997264,5cyclictest2054630-21kworker/u8:3+flush-179:021:50:141
2002939997164,5cyclictest2058072-21kworker/u8:1+flush-179:022:05:211
2002934996961,6cyclictest2104582-21kworker/u8:3+flush-179:000:30:010
2002939996861,5cyclictest2051708-21/usr/sbin/munin21:40:231
2002939996861,5cyclictest2025495-21latency_hist20:20:011
2002939996859,7cyclictest2002888-21kworker/u8:1+flush-179:019:20:261
2002934996862,4cyclictest2070860-21kworker/u8:1+events_unbound22:45:010
2002939996756,9cyclictest2093601-21apt-get23:50:111
2002939996660,5cyclictest2009236-21kworker/u8:1+flush-179:019:29:551
2002934996661,4cyclictest2070860-21kworker/u8:1+flush-179:023:05:180
2002939996559,4cyclictest2011102-21apt-get19:35:121
2002939996558,5cyclictest2104582-21kworker/u8:3+flush-179:000:25:261
2002939996558,4cyclictest2081280-21kworker/u8:3+flush-179:023:30:201
2002934996559,4cyclictest2048055-21kworker/u8:2+flush-179:022:00:230
2002934996559,4cyclictest2048055-21kworker/u8:2+flush-179:022:00:220
200293999640,1cyclictest0-21swapper/121:13:591
2002939996360,2cyclictest714-21Xorg23:02:591
2002939996358,4cyclictest2058072-21kworker/u8:1+flush-179:022:04:561
2002939996358,4cyclictest2058072-21kworker/u8:1+flush-179:022:04:561
2002939996358,4cyclictest2007642-21kworker/u8:0+flush-179:020:24:561
2002939996355,6cyclictest2066026-21kworker/u8:1+flush-179:022:25:141
2002939996355,6cyclictest2066026-21kworker/u8:1+flush-179:022:25:141
2002939996355,6cyclictest2038462-21latency_hist21:00:011
2002934996360,2cyclictest0-21swapper/021:42:580
2002934996357,4cyclictest2056218-21kworker/u8:0+flush-179:022:15:200
2002934996356,5cyclictest2023929-21kworker/u8:1+flush-179:021:25:140
2002934996355,6cyclictest2081280-21kworker/u8:3+flush-179:023:35:200
2002934996354,7cyclictest2056227-21latency_hist21:55:010
2002934996351,9cyclictest2007642-21kworker/u8:0+events_unbound19:50:220
2002939996256,4cyclictest2007642-21kworker/u8:0+flush-179:019:50:261
2002939996254,5cyclictest2104582-21kworker/u8:3+flush-179:000:35:151
2002934996256,5cyclictest2086792-21kworker/u8:0+events_unbound23:45:240
2002934996256,4cyclictest2007642-21kworker/u8:0+flush-179:019:55:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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