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2026-03-11 - 21:20
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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 Wed Mar 11, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21854249910695,8cyclictest266-21systemd-journal09:50:001
21854249910288,11cyclictest2201322-21apt-get08:00:011
2185424999991,5cyclictest2207275-21kworker/u8:0+events_unbound08:20:001
2185424999786,9cyclictest2201322-21apt-get08:00:031
2185424999786,9cyclictest2201322-21apt-get08:00:021
2185424999584,8cyclictest2243723-21latency_hist10:10:011
2185424999384,6cyclictest2229442-21kworker/u8:1+flush-179:009:35:221
2185424999081,6cyclictest2208245-21kworker/u8:2+events_unbound09:20:191
2185424998979,7cyclictest2207275-21kworker/u8:0+flush-179:008:55:201
2185424998775,10cyclictest2206351-21apt-get08:15:001
2185424998681,4cyclictest2198316-21kworker/u8:0+flush-179:007:55:011
2185424998678,6cyclictest2234225-21kworker/u8:0+flush-179:009:50:191
2185421998675,8cyclictest2285619-21latency_hist12:20:000
2185424998577,5cyclictest2240587-21kworker/u8:3+events_unbound10:20:191
2185424998470,5cyclictest2277637-21kworker/u8:0+flush-179:012:20:001
2185424998377,4cyclictest2169285-21kworker/u8:3+events_unbound07:10:241
2185424998375,6cyclictest2240587-21kworker/u8:3+events_unbound10:00:231
2185421998375,6cyclictest2234184-21latency_hist09:40:020
2185424998277,3cyclictest2277637-21kworker/u8:0+events_unbound12:10:231
2185424998276,4cyclictest2286920-21kworker/u8:1+events_unbound12:25:201
2185424998275,5cyclictest2234225-21kworker/u8:0+flush-179:010:30:001
2185424998072,7cyclictest2225962-21apt-get09:15:041
2185424998072,7cyclictest2225962-21apt-get09:15:031
2185424998072,6cyclictest2259875-21kworker/u8:1+events_unbound11:10:001
2185424997974,4cyclictest2208245-21kworker/u8:2+events_unbound08:25:221
2185424997974,4cyclictest2208245-21kworker/u8:2+events_unbound08:25:221
2185424997971,6cyclictest2273135-21/usr/sbin/munin11:40:231
2185424997873,3cyclictest2186885-21kworker/u8:0+events_unbound07:20:251
2185424997871,5cyclictest2231233-21kworker/u8:2+flush-179:009:30:211
2185424997870,6cyclictest2234225-21kworker/u8:0+events_unbound10:20:001
2185424997770,5cyclictest2208245-21kworker/u8:2+flush-179:009:05:001
2185424997671,3cyclictest2182342-21kworker/u8:2+flush-179:007:15:241
2185424997670,4cyclictest2256692-21kworker/u8:3+flush-179:010:50:191
2185424997669,5cyclictest2256692-21kworker/u8:3+flush-179:011:50:251
2185424997669,5cyclictest2186888-21kworker/u8:1+events_unbound07:30:241
2185424997667,7cyclictest2240587-21kworker/u8:3+events_unbound10:10:191
2185424997666,4cyclictest2207275-21kworker/u8:0+events_unbound09:30:011
2185424997569,4cyclictest2277687-21kworker/u8:1+flush-179:012:05:201
2185424997569,4cyclictest2207275-21kworker/u8:0+flush-179:009:10:251
2185424997366,4cyclictest2256692-21kworker/u8:3+events_unbound11:20:191
2185424997267,4cyclictest2191725-21kworker/u8:3+flush-179:007:40:011
2185424997163,5cyclictest2256692-21kworker/u8:3+flush-179:011:45:201
2185424997163,5cyclictest2182342-21kworker/u8:2+flush-179:007:40:221
2185424997062,6cyclictest2261494-21latency_hist11:05:011
2185424997060,4cyclictest2229442-21kworker/u8:1+events_unbound10:00:001
2185424996962,5cyclictest2256692-21kworker/u8:3+flush-179:011:25:191
2185421996964,4cyclictest2250384-21kworker/u8:2+events_unbound10:43:360
2185424996864,3cyclictest2250384-21kworker/u8:2+flush-179:010:39:561
2185421996863,4cyclictest2263115-21kworker/u8:2+events_unbound11:34:190
2185421996763,3cyclictest2240587-21kworker/u8:3+events_unbound10:23:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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