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2026-04-15 - 14:37
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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 Wed Apr 15, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10396719910379,17cyclictest1110181-21http22:50:010
1039671999284,6cyclictest1139145-21latency_hist00:20:010
1039671999080,7cyclictest1113590-21latency_hist23:00:010
1039673998677,7cyclictest1070128-21http20:45:001
1039671998679,5cyclictest1100598-21latency_hist22:20:010
1039671998477,5cyclictest1049439-21kworker/u8:2+events_unbound19:40:260
1039671997971,6cyclictest1094228-21latency_hist22:00:010
1039671997669,5cyclictest1073528-21latency_hist20:55:010
1039671997362,9cyclictest266-21systemd-journal19:20:000
1039671997163,6cyclictest1118362-21latency_hist23:15:010
1039673996963,4cyclictest1142306-21latency_hist00:30:011
1039671996960,6cyclictest1118701-21kworker/u8:2+flush-179:023:30:000
1039673996861,5cyclictest266-21systemd-journal19:36:301
103967399671,64cyclictest1076718-21cron21:05:011
103967399671,64cyclictest1076718-21cron21:05:011
1039671996760,5cyclictest1052575-21latency_hist19:50:010
1039673996356,5cyclictest1074540-21kworker/u8:0+flush-179:021:05:151
1039671996352,9cyclictest1102450-21apt-get22:25:100
1039679996258,2cyclictest0-21swapper/319:24:593
103967199621,56cyclictest1076728-21munin-run21:05:010
103967199621,56cyclictest1076728-21munin-run21:05:010
1039671996154,5cyclictest1060529-21latency_hist20:15:010
1039671995950,7cyclictest266-21systemd-journal00:35:000
1039671995950,7cyclictest1046463-21apt-get19:30:110
1039671995950,6cyclictest1078308-21latency_hist21:10:010
1039673995849,7cyclictest1110163-21apt-get22:50:001
1039673995844,12cyclictest1110112-21kworker/u8:1+flush-179:000:05:261
1039673995844,12cyclictest1110112-21kworker/u8:1+flush-179:000:05:251
103967199581,17cyclictest1071958-21idleruntime-cro20:50:000
1039673995749,6cyclictest1044620-21latency_hist19:25:011
1039673995747,8cyclictest1042766-21latency_hist19:20:021
103967399570,55cyclictest1118379-21awk23:15:001
1039671995750,6cyclictest1127963-21kworker/u8:2+events_unbound00:00:010
1039671995750,6cyclictest1127963-21kworker/u8:2+events_unbound00:00:010
1039671995747,8cyclictest1132985-21apt-get00:00:120
1039673995650,4cyclictest266-21systemd-journal00:22:181
1039673995649,5cyclictest1039549-21latency_hist19:10:011
1039673995646,8cyclictest1107235-21apt-get22:40:121
103967399561,52cyclictest714-21Xorg21:54:591
103967399561,52cyclictest714-21Xorg21:54:591
103967399561,17cyclictest1071945-21munin-run20:50:001
1039671995646,8cyclictest1081760-21apt-get21:20:100
1039673995544,9cyclictest266-21systemd-journal00:18:121
1039671995537,16cyclictest266-21systemd-journal22:34:110
103967399541,48cyclictest1-21systemd22:34:111
103967399540,51cyclictest714-21Xorg19:42:591
1039673995344,7cyclictest1112254-21apt-get22:55:111
103967199530,52cyclictest0-21swapper/021:54:590
103967199530,52cyclictest0-21swapper/021:54:580
1039673995245,5cyclictest1103780-21latency_hist22:30:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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