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2026-06-18 - 18:49
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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 Thu Jun 18, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
238822099127119,6cyclictest1213033-21systemd-journal10:50:011
238822099126113,10cyclictest2391283-21apt-get07:20:031
238822099122117,4cyclictest2468150-21kworker/u8:1+events_unbound11:35:011
238822099117112,4cyclictest2487786-21kworker/u8:2+flush-179:012:15:011
238822099112106,4cyclictest2448349-21kworker/u8:3+flush-179:010:20:001
238822099111105,5cyclictest2440343-21kworker/u8:1+flush-179:010:00:011
238822099110104,4cyclictest2448349-21kworker/u8:3+flush-179:010:25:021
238822099109100,6cyclictest2492808-21kworker/u8:0+events_unbound12:30:141
23882169910898,6cyclictest2486206-21latency_hist12:10:000
23882209910699,5cyclictest2407726-21kworker/u8:2+flush-179:008:09:591
23882209910498,4cyclictest2487786-21kworker/u8:2+events_unbound12:15:241
23882169910496,6cyclictest2393153-21apt-get07:25:000
23882169910490,10cyclictest2484362-21latency_hist12:05:010
23882209910393,7cyclictest2432139-21latency_hist09:25:011
23882169910284,16cyclictest1213033-21systemd-journal07:30:000
23882209910091,5cyclictest2388061-21kworker/u8:1+flush-179:007:25:021
23882169910090,7cyclictest2427357-21latency_hist09:10:010
2388220999991,6cyclictest2477972-21kworker/u8:0+flush-179:011:45:221
2388216999992,5cyclictest2388061-21kworker/u8:1+events_unbound07:10:230
2388220999890,6cyclictest2396558-21kworker/u8:2+flush-179:007:50:211
2388216999889,6cyclictest2496046-21latency_hist12:40:020
2388220999792,4cyclictest2415742-21kworker/u8:3+events_unbound08:45:221
2388220999689,4cyclictest2455166-21kworker/u8:1+flush-179:010:35:201
2388216999686,7cyclictest2443560-21latency_hist10:00:010
2388216999684,9cyclictest2492831-21latency_hist12:30:000
2388220999487,5cyclictest2419408-21kworker/u8:2+events_unbound08:55:131
2388220999486,6cyclictest2458383-21latency_hist10:45:011
2388220999486,6cyclictest1213033-21systemd-journal09:45:001
2388220999386,4cyclictest2440343-21kworker/u8:1+flush-179:010:20:131
2388220999284,6cyclictest2419408-21kworker/u8:2+events_unbound09:00:211
2388220999284,5cyclictest2487786-21kworker/u8:2+events_unbound12:35:131
2388220999280,7cyclictest2491502-21apt-get12:25:121
2388216999282,8cyclictest2429200-21apt-get09:15:110
2388216999187,2cyclictest2458377-21kworker/u8:2+events_unbound10:54:590
2388220999085,4cyclictest2393206-21kworker/u8:0+flush-179:007:35:241
2388220999084,4cyclictest2409993-21kworker/u8:1+flush-179:008:20:011
2388220999081,6cyclictest2388061-21kworker/u8:1+flush-179:007:30:201
2388220999079,4cyclictest2441968-21kworker/u8:0+events_unbound10:05:141
2388216999082,4cyclictest2468150-21kworker/u8:1+flush-179:012:20:180
2388216998982,5cyclictest2468150-21kworker/u8:1+flush-179:011:40:230
2388220998882,4cyclictest2448349-21kworker/u8:3+events_unbound11:05:001
2388220998882,4cyclictest2412508-21kworker/u8:0+flush-179:008:25:251
2388220998881,5cyclictest2422367-21kworker/u8:0+flush-179:009:25:191
2388220998880,5cyclictest2414370-21kworker/u8:1+events_unbound08:35:141
2388216998883,3cyclictest2487786-21kworker/u8:2+flush-179:012:20:020
2388216998882,4cyclictest2422367-21kworker/u8:0+events_unbound09:10:130
2388216998782,3cyclictest2451899-21kworker/u8:2+events_unbound10:25:260
2388216998780,5cyclictest2468150-21kworker/u8:1+flush-179:011:15:120
2388216998780,5cyclictest2388120-21kworker/u8:2+flush-179:007:15:220
2388220998680,4cyclictest2427391-21kworker/u8:1+flush-179:009:10:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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