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2026-05-19 - 03:38
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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 19, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29998169911888,27cyclictest3056493-21kworker/u8:0+flush-179:022:10:241
299981299112102,7cyclictest3007681-21latency_hist19:35:010
299981299112102,7cyclictest1213033-21systemd-journal00:00:010
299981699111103,5cyclictest3009274-21latency_hist19:40:011
29998129911191,17cyclictest3102714-21latency_hist00:30:010
29998129910090,8cyclictest3010874-21latency_hist19:45:010
2999812999989,7cyclictest1213033-21systemd-journal22:55:010
2999816999787,7cyclictest3080129-21latency_hist23:20:011
2999816999184,4cyclictest3030582-21kworker/u8:2+flush-179:021:00:231
2999812998981,6cyclictest1213033-21systemd-journal23:05:000
2999812998981,6cyclictest1213033-21systemd-journal23:05:000
2999812998977,9cyclictest3078755-21/usr/sbin/munin23:15:250
2999812998676,8cyclictest3027583-21/usr/sbin/munin20:35:260
2999812998676,8cyclictest3027583-21/usr/sbin/munin20:35:250
2999816998476,5cyclictest3048012-21kworker/u8:0+flush-179:021:40:241
2999812998476,6cyclictest3052802-21latency_hist21:55:010
2999816998374,7cyclictest3093372-21/usr/sbin/munin00:00:241
2999816998273,6cyclictest3018874-21latency_hist20:10:011
2999812998269,10cyclictest3020460-21latency_hist20:15:010
2999816998071,6cyclictest3073806-21kworker/u8:3+flush-179:023:30:001
2999816997969,7cyclictest1213033-21systemd-journal21:59:591
2999816997968,8cyclictest1213033-21systemd-journal22:20:001
2999816997766,9cyclictest3003177-21apt-get19:20:111
2999812997766,8cyclictest3040306-21/usr/sbin/munin21:15:250
2999816997665,10cyclictest3004318-21kworker/u8:0+flush-179:019:25:241
2999816997262,7cyclictest3040069-21latency_hist21:15:011
2999816996956,3cyclictest3025507-21apt-get20:30:001
2999812996859,7cyclictest3056494-21/usr/sbin/munin22:05:240
2999816996660,4cyclictest3061291-21apt-get22:20:111
2999812996663,2cyclictest3007658-21kworker/u8:0+events_unbound20:00:220
2999812996655,8cyclictest3093157-21kworker/u8:3+flush-179:000:10:210
2999816996560,4cyclictest3007658-21kworker/u8:0+flush-179:020:00:251
2999816996557,6cyclictest3035271-21kworker/u8:1+flush-179:021:40:011
2999812996561,3cyclictest2998247-21kworker/u8:2+flush-179:019:10:250
2999812996554,9cyclictest3080382-21apt-get23:20:130
2999816996254,5cyclictest3044850-21latency_hist21:30:011
2999812996254,5cyclictest3012501-21kworker/u8:3+events_unbound19:55:000
2999812996251,9cyclictest3072410-21apt-get22:55:120
2999816996155,4cyclictest3060989-21kworker/u8:3+flush-179:022:30:231
2999812996154,5cyclictest3030537-21latency_hist20:45:010
2999812996150,9cyclictest3004763-21apt-get19:25:110
2999816996054,4cyclictest3051253-21kworker/u8:2+flush-179:023:00:271
2999816996054,4cyclictest3051253-21kworker/u8:2+flush-179:023:00:261
2999812996054,4cyclictest3092264-21kworker/u8:2+flush-179:000:15:170
2999816995950,6cyclictest3067445-21kworker/u8:1+flush-179:022:55:181
2999816995947,10cyclictest3092264-21kworker/u8:2+events_unbound00:30:151
2999812995949,8cyclictest3049886-21apt-get21:45:140
2999816995851,5cyclictest3070566-21kworker/u8:0+flush-179:022:50:211
2999816995851,5cyclictest3032122-21latency_hist20:50:011
2999816995848,6cyclictest1-21systemd20:25:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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