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2026-03-23 - 08:08
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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 Mon Mar 23, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
60167999116103,11cyclictest680947-21http23:15:000
6016799910395,6cyclictest676142-21latency_hist23:00:000
6016799910080,14cyclictest510-21rs:main0
601679999992,5cyclictest630506-21apt-get20:39:470
601681999689,5cyclictest604756-21kworker/u8:0+events_unbound19:45:001
601679999663,19cyclictest680925-21apt-get23:15:010
601681999489,4cyclictest612779-21kworker/u8:2+flush-179:019:50:001
601681999383,7cyclictest682776-21latency_hist23:20:021
601679999383,7cyclictest689145-21latency_hist23:40:010
601681999181,7cyclictest653617-21latency_hist21:50:011
601681998980,7cyclictest598286-21kworker/u8:2+flush-179:019:15:011
601679998980,6cyclictest628704-21kworker/u8:3+events_unbound21:00:000
601681998677,6cyclictest654662-21kworker/u8:1+flush-179:022:10:251
601681998577,7cyclictest643603-21kworker/u8:3+events_unbound21:35:231
601681998377,4cyclictest702243-21kworker/u8:3+flush-179:000:40:001
601681998371,9cyclictest266-21systemd-journal21:55:011
601681998274,6cyclictest626352-21kworker/u8:2+events_unbound20:40:001
601681997973,4cyclictest647025-21kworker/u8:1+events_unbound21:35:011
601681997971,5cyclictest668190-21latency_hist22:35:001
601681997870,6cyclictest643603-21kworker/u8:3+events_unbound21:25:021
601681997769,6cyclictest638667-21kworker/u8:2+flush-179:021:15:211
601679997759,11cyclictest266-21systemd-journal23:46:470
601681997666,7cyclictest631371-21kworker/u8:0+flush-179:020:45:201
601681997469,4cyclictest638667-21kworker/u8:2+flush-179:021:10:001
601681997467,5cyclictest643603-21kworker/u8:3+flush-179:022:05:031
601681997463,8cyclictest628785-21store20:35:001
601679997468,4cyclictest651778-21apt-get21:45:000
601679997466,6cyclictest669791-21latency_hist22:40:000
601681997368,4cyclictest643603-21kworker/u8:3+events_unbound22:00:151
601681997265,5cyclictest601554-21kworker/u8:1+events_unbound19:15:261
601681997162,6cyclictest628704-21kworker/u8:3+flush-179:020:50:221
601681997159,4cyclictest604756-21kworker/u8:0+flush-179:019:50:211
601679997162,6cyclictest628704-21kworker/u8:3+flush-179:020:40:200
601679997160,9cyclictest625729-21apt-get20:25:130
601681997064,4cyclictest683169-21kworker/u8:0+events_unbound23:40:201
601681997061,6cyclictest637189-21kworker/u8:0+events_unbound21:00:141
601679997061,7cyclictest608203-21/usr/sbin/munin19:30:230
601681996958,4cyclictest694439-21kworker/u8:0+flush-179:000:00:241
601681996958,4cyclictest694439-21kworker/u8:0+flush-179:000:00:241
601681996953,14cyclictest690712-21kworker/u8:1+events_unbound23:55:221
601681996861,6cyclictest671358-21kworker/u8:0+flush-179:022:50:011
601679996861,5cyclictest638524-21apt-get21:05:000
601679996856,9cyclictest638524-21apt-get21:05:010
601681996761,4cyclictest606426-21kworker/u8:3+flush-179:019:30:151
601681996662,3cyclictest601554-21kworker/u8:1+flush-179:019:25:001
601681996658,6cyclictest703766-21kworker/u8:4+events_unbound00:25:281
601681996658,6cyclictest703766-21kworker/u8:4+events_unbound00:25:271
601681996658,6cyclictest668171-21kworker/u8:2+events_unbound22:35:141
601679996657,6cyclictest656790-21latency_hist22:00:020
601681996358,4cyclictest671358-21kworker/u8:0+flush-179:022:50:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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