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2026-06-02 - 03:39
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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 Jun 02, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
375189299124115,6cyclictest3788643-21latency_hist21:05:011
37518929911199,10cyclictest1213033-21systemd-journal20:05:001
37518919911199,8cyclictest3782321-21kworker/u8:3+flush-179:021:55:000
375189299110100,8cyclictest3845601-21kworker/u8:1+flush-179:000:30:241
375189299110100,8cyclictest3845601-21kworker/u8:1+flush-179:000:30:231
37518929910697,7cyclictest3842496-21kworker/u8:3+flush-179:000:10:001
37518929910592,12cyclictest3751803-21kworker/u8:0+events_unbound19:10:251
37518929910390,10cyclictest1213033-21systemd-journal21:40:261
3751892999786,9cyclictest3847303-21apt-get00:05:011
3751892999786,9cyclictest3847303-21apt-get00:05:001
3751892999683,11cyclictest3845601-21kworker/u8:1+flush-179:000:10:171
3751891999686,7cyclictest3821510-21latency_hist22:45:020
3751891999686,7cyclictest3813532-21kworker/u8:0+flush-179:022:30:240
3751892999186,4cyclictest3782321-21kworker/u8:3+events_unbound21:25:251
3751892999084,4cyclictest3825231-21kworker/u8:1+events_unbound23:25:001
3751892999082,6cyclictest3826322-21kworker/u8:2+flush-179:023:10:001
3751892999082,6cyclictest3766091-21latency_hist19:55:011
3751891999079,7cyclictest3800041-21latency_hist21:40:010
3751892998781,4cyclictest3834217-21kworker/u8:2+events_unbound23:25:241
3751892998780,4cyclictest3845601-21kworker/u8:1+flush-179:000:25:221
3751892998676,8cyclictest3805071-21apt-get21:55:001
3751891998671,12cyclictest1213033-21systemd-journal21:20:000
3751892998578,5cyclictest3798421-21kworker/u8:2+flush-179:021:35:001
3751892998577,5cyclictest3834217-21kworker/u8:2+flush-179:023:35:211
3751891998576,6cyclictest3764506-21latency_hist19:50:000
3751892998477,5cyclictest3769523-21kworker/u8:1+flush-179:020:15:011
3751892998374,7cyclictest3819651-21apt-get22:40:001
3751891998375,5cyclictest3769536-21kworker/u8:3+events_unbound20:10:010
3751892998275,6cyclictest3785483-21kworker/u8:2+events_unbound21:00:011
3751891998172,7cyclictest3811663-21kworker/u8:2+flush-179:022:20:000
3751892998072,5cyclictest3746021-21kworker/u8:2+flush-179:019:20:011
3751892997971,6cyclictest3836063-21kworker/u8:0+events_unbound23:50:241
3751892997872,4cyclictest3813532-21kworker/u8:0+events_unbound22:30:241
3751892997872,4cyclictest3775946-21kworker/u8:2+events_unbound20:30:251
3751892997771,4cyclictest3831044-21latency_hist23:15:011
3751892997670,4cyclictest3785483-21kworker/u8:2+events_unbound21:15:181
3751892997661,12cyclictest1098763-21cups-browsed00:00:011
3751892997661,12cyclictest1098763-21cups-browsed00:00:011
3751891997665,8cyclictest3803217-21latency_hist21:50:020
3751892997570,4cyclictest3785483-21kworker/u8:2+flush-179:021:10:251
3751892997570,4cyclictest3756588-21kworker/u8:3+flush-179:019:30:211
3751892997569,4cyclictest3845601-21kworker/u8:1+events_unbound00:20:251
3751892997567,5cyclictest3801868-21kworker/u8:1+flush-179:022:00:141
3751891997570,3cyclictest3775946-21kworker/u8:2+flush-179:020:30:260
3751892997468,4cyclictest3771175-21kworker/u8:0+flush-179:020:25:191
3751892997468,4cyclictest3746021-21kworker/u8:2+events_unbound20:05:231
3751892997467,5cyclictest3746021-21kworker/u8:2+events_unbound19:45:261
3751892997465,6cyclictest3858691-21latency_hist00:40:011
3751892997366,5cyclictest3813532-21kworker/u8:0+events_unbound22:20:151
3751892997366,5cyclictest3782321-21kworker/u8:3+flush-179:020:55:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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