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2026-03-07 - 17:04
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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 Fri Mar 06, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8790549910595,7cyclictest945356-21kworker/u8:2+flush-179:010:35:000
879058999992,5cyclictest911749-21kworker/u8:3+events_unbound09:10:001
879058999991,6cyclictest953594-21latency_hist11:00:021
879058999588,5cyclictest911749-21kworker/u8:3+flush-179:009:20:001
879054999486,5cyclictest978072-21kworker/u8:2+flush-179:012:20:000
879058999285,5cyclictest892609-21kworker/u8:0+flush-179:008:20:001
879058999181,7cyclictest914887-21latency_hist09:00:011
879058999181,7cyclictest914887-21latency_hist09:00:011
879058999085,4cyclictest947204-21kworker/u8:0+events_unbound10:40:011
879054999080,7cyclictest985994-21latency_hist12:40:010
879054999080,7cyclictest985994-21latency_hist12:40:010
879058998879,7cyclictest940653-21kworker/u8:1+events_unbound10:30:001
879054998881,5cyclictest961882-21kworker/u8:0+flush-179:011:25:010
879054998877,9cyclictest895545-21apt-get08:00:030
879058998780,5cyclictest919687-21kworker/u8:2+events_unbound09:35:241
879058998678,6cyclictest883836-21kworker/u8:2+events_unbound07:50:011
879054998676,7cyclictest957087-21latency_hist11:10:000
879058998579,4cyclictest862742-21kworker/u8:1+flush-179:007:40:211
879054998478,4cyclictest900596-21kworker/u8:2+flush-179:008:30:010
879054998475,7cyclictest961904-21kworker/u8:1+events_unbound11:30:000
879058998379,2cyclictest883836-21kworker/u8:2+events_unbound07:35:231
879054998374,7cyclictest895545-21apt-get08:00:010
879058998263,5cyclictest955440-21kworker/u8:0+events_unbound11:15:001
879058998169,10cyclictest885457-21apt-get07:29:591
879058998073,5cyclictest970082-21kworker/u8:3+flush-179:012:15:201
879058998071,7cyclictest862742-21kworker/u8:1+flush-179:007:15:191
879054997972,5cyclictest919687-21kworker/u8:2+flush-179:009:40:000
879054997969,5cyclictest881329-21kworker/u8:0+events_unbound07:20:280
879058997770,5cyclictest927924-21kworker/u8:3+events_unbound10:10:191
879058997770,4cyclictest892609-21kworker/u8:0+events_unbound07:50:241
879058997767,7cyclictest898977-21latency_hist08:10:021
879058997766,8cyclictest965042-21latency_hist11:35:011
879054997764,10cyclictest885447-21latency_hist07:30:000
879058997671,4cyclictest947241-21kworker/u8:3+flush-179:010:45:221
879058997669,5cyclictest900596-21kworker/u8:2+events_unbound08:25:231
879058997669,5cyclictest890544-21kworker/u8:3+events_unbound07:55:231
879054997464,8cyclictest953590-21apt-get11:00:010
879054997462,9cyclictest266-21systemd-journal09:30:000
879058997366,5cyclictest934915-21kworker/u8:0+flush-179:010:05:211
879058997267,4cyclictest922316-21kworker/u8:0+flush-179:009:50:231
879058997265,5cyclictest945356-21kworker/u8:2+events_unbound11:00:181
879058997166,4cyclictest911749-21kworker/u8:3+flush-179:009:00:151
879058997165,5cyclictest900596-21kworker/u8:2+flush-179:008:30:211
879058997163,5cyclictest970082-21kworker/u8:3+flush-179:012:10:171
879058997063,6cyclictest908496-21kworker/u8:0+flush-179:008:45:011
879058997063,5cyclictest968482-21kworker/u8:1+events_unbound11:45:191
879058997063,5cyclictest862742-21kworker/u8:1+events_unbound07:10:041
879058997059,8cyclictest266-21systemd-journal11:55:011
879058996962,5cyclictest965020-21kworker/u8:0+flush-179:011:35:001
879058996863,4cyclictest892609-21kworker/u8:0+events_unbound08:10:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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