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2026-05-03 - 09:04
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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 May 03, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
66970199148137,8cyclictest1213033-21systemd-journal00:04:011
66970199112104,5cyclictest680742-21latency_hist19:45:011
6697019910390,10cyclictest695324-21latency_hist20:30:001
6696999910297,4cyclictest752906-21kworker/u8:1+flush-179:000:04:000
6696999910293,7cyclictest733247-21latency_hist22:25:010
669701999585,8cyclictest756047-21latency_hist23:35:011
669701999585,7cyclictest764064-21kworker/u8:0+flush-179:000:15:021
669701999487,5cyclictest671164-21kworker/u8:1+flush-179:019:30:011
669701999387,4cyclictest764084-21kworker/u8:3+flush-179:000:20:171
669699999383,7cyclictest770728-21latency_hist00:20:010
669701999284,5cyclictest4192177-21kworker/u8:2+events_unbound20:20:011
669699999276,13cyclictest695339-21apt-get20:30:010
669701998981,6cyclictest731666-21kworker/u8:2+flush-179:022:20:001
669699998982,5cyclictest764084-21kworker/u8:3+flush-179:000:39:590
66969999870,85cyclictest1-21systemd21:30:010
66969999861,82cyclictest1-21systemd21:10:000
669701998475,6cyclictest677523-21kworker/u8:0+flush-179:019:35:251
669701998276,4cyclictest4192177-21kworker/u8:2+flush-179:020:50:001
669699998267,12cyclictest1213033-21systemd-journal00:10:010
669701998174,5cyclictest4192177-21kworker/u8:2+flush-179:019:25:011
669699998173,5cyclictest734833-21latency_hist22:30:010
669701998068,8cyclictest708850-21kworker/u8:2+flush-179:021:15:011
669701998068,8cyclictest708850-21kworker/u8:2+flush-179:021:15:011
669699997967,8cyclictest764064-21kworker/u8:0+flush-179:000:00:010
669701997668,5cyclictest773885-21kworker/u8:0+events_unbound00:30:231
669701997564,8cyclictest723455-21kworker/u8:2+flush-179:022:05:031
669701997564,8cyclictest723455-21kworker/u8:2+flush-179:022:05:021
669701997468,4cyclictest736411-21kworker/u8:4+flush-179:022:40:151
669701997367,4cyclictest718698-21kworker/u8:3+events_unbound21:55:251
669701997365,5cyclictest759276-21kworker/u8:3+flush-179:023:55:001
669699997365,6cyclictest687369-21latency_hist20:05:010
669701997164,5cyclictest723335-21kworker/u8:1+flush-179:022:00:211
669699997167,3cyclictest752858-21kworker/u8:0+events_unbound23:29:550
669701996963,4cyclictest715446-21kworker/u8:0+flush-179:021:35:001
669699996960,6cyclictest705405-21latency_hist21:00:020
669699996960,6cyclictest705405-21latency_hist21:00:020
66970599680,65cyclictest0-21swapper/223:00:002
669701996862,4cyclictest741237-21kworker/u8:0+flush-179:023:05:011
669701996860,6cyclictest757649-21latency_hist23:40:011
669701996860,6cyclictest751267-21latency_hist23:20:011
669701996761,4cyclictest668047-21kworker/u8:3+flush-179:019:10:231
669701996760,5cyclictest702256-21kworker/u8:0+flush-179:021:15:011
669701996758,7cyclictest702256-21kworker/u8:0+flush-179:020:55:011
669699996762,3cyclictest741237-21kworker/u8:0+flush-179:022:55:260
669701996560,4cyclictest718698-21kworker/u8:3+flush-179:021:49:041
669699996557,5cyclictest723420-21latency_hist21:55:000
669701996459,4cyclictest4192177-21kworker/u8:2+flush-179:020:09:551
669701996456,5cyclictest752858-21kworker/u8:0+events_unbound23:25:231
669701996456,5cyclictest739596-21kworker/u8:2+flush-179:022:50:001
66970199640,3cyclictest714-21Xorg20:03:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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