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2026-06-27 - 04:56
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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 Jun 27, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29219999140131,6cyclictest319267-21latency_hist20:35:010
29219999133119,11cyclictest1213033-21systemd-journal00:05:010
29219999133119,11cyclictest1213033-21systemd-journal00:05:010
29220099113108,4cyclictest330706-21kworker/u8:3+flush-179:021:10:241
29220099112108,3cyclictest385876-21kworker/u8:2+flush-179:000:04:011
29220099112108,3cyclictest385876-21kworker/u8:2+flush-179:000:04:011
29220099111106,4cyclictest324339-21kworker/u8:2+events_unbound20:55:231
29220099108103,4cyclictest351609-21kworker/u8:2+events_unbound22:20:001
29219999108100,4cyclictest380440-21kworker/u8:0+events_unbound00:15:010
2922009910298,3cyclictest371268-21kworker/u8:3+events_unbound23:25:151
2922009910298,3cyclictest329077-21kworker/u8:1+flush-179:021:15:251
2921999910292,7cyclictest377602-21latency_hist23:35:010
2922009910189,9cyclictest337050-21apt-get21:29:591
2921999910195,3cyclictest350015-21kworker/u8:0+flush-179:023:05:210
2922009910093,5cyclictest298533-21apt-get19:26:561
2922009910087,9cyclictest364609-21latency_hist22:55:011
292199999978,18cyclictest385855-40mandb00:00:010
292200999893,4cyclictest308187-21kworker/u8:3+events_unbound20:25:231
292200999887,8cyclictest348697-21apt-get22:05:111
292199999893,3cyclictest350015-21kworker/u8:0+flush-179:022:20:140
292199999884,10cyclictest351609-21kworker/u8:2+flush-179:022:15:010
292200999792,4cyclictest335485-21kworker/u8:0+events_unbound21:55:251
292200999792,4cyclictest308187-21kworker/u8:3+events_unbound20:50:241
292200999792,4cyclictest286081-21kworker/u8:3+events_unbound19:20:251
292200999792,4cyclictest286081-21kworker/u8:3+events_unbound19:20:251
292200999691,4cyclictest371268-21kworker/u8:3+events_unbound23:35:201
292200999690,5cyclictest351609-21kworker/u8:2+flush-179:022:20:261
292199999687,5cyclictest333832-21kworker/u8:2+events_unbound21:30:010
292200999590,4cyclictest308187-21kworker/u8:3+events_unbound20:45:231
292200999589,5cyclictest371268-21kworker/u8:3+flush-179:023:40:131
292200999589,5cyclictest371268-21kworker/u8:3+flush-179:023:40:131
292200999589,4cyclictest312941-21kworker/u8:1+events_unbound20:15:211
292200999589,4cyclictest286081-21kworker/u8:3+flush-179:019:35:161
292200999488,4cyclictest345283-21kworker/u8:3+events_unbound22:00:181
292200999483,8cyclictest1213033-21systemd-journal00:40:011
292199999474,17cyclictest364618-21apt-get22:55:010
292200999383,6cyclictest296978-21kworker/u8:2+flush-179:019:55:211
292200999287,4cyclictest308187-21kworker/u8:3+flush-179:020:30:251
292199999180,7cyclictest380440-21kworker/u8:0+flush-179:023:50:210
292200999076,11cyclictest351609-21kworker/u8:2+events_unbound22:45:001
292200999075,11cyclictest371268-21kworker/u8:3+flush-179:000:00:001
292200998984,4cyclictest308187-21kworker/u8:3+events_unbound20:20:231
292200998882,4cyclictest286081-21kworker/u8:3+flush-179:019:30:211
292200998878,7cyclictest308187-21kworker/u8:3+flush-179:020:05:211
292200998780,5cyclictest380440-21kworker/u8:0+flush-179:023:45:161
292199998781,4cyclictest308187-21kworker/u8:3+flush-179:020:50:200
292200998681,4cyclictest287594-21kworker/u8:0+events_unbound19:15:141
292200998677,6cyclictest343664-21latency_hist21:50:011
292200998671,11cyclictest1213033-21systemd-journal21:40:011
29220099850,83cyclictest1-21systemd21:55:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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