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2026-04-28 - 03:25
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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 Apr 27, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22436199910294,6cyclictest2306060-21kworker/u8:2+events_unbound10:50:010
2243619999888,8cyclictest2296850-21latency_hist09:55:010
2243622999788,7cyclictest2292091-21latency_hist09:40:011
2243619999182,7cyclictest2272986-21latency_hist08:40:010
2243622998878,7cyclictest2284113-21latency_hist09:15:011
2243622998877,9cyclictest1213033-21systemd-journal09:05:001
2243619998863,9cyclictest2336104-21latency_hist11:55:010
2243619998680,5cyclictest2306060-21kworker/u8:2+events_unbound10:50:250
2243619998576,6cyclictest2271377-21latency_hist08:35:010
2243622998373,7cyclictest2339559-21latency_hist12:05:011
2243619998174,5cyclictest2251711-21kworker/u8:0+events_unbound07:35:230
2243619998173,5cyclictest2309895-21kworker/u8:3+flush-179:011:25:000
2243619998072,6cyclictest2268201-21latency_hist08:25:010
2243619997972,5cyclictest2255205-21latency_hist07:45:010
2243619997972,5cyclictest2255205-21latency_hist07:45:000
2243619997972,5cyclictest2250138-21latency_hist07:30:000
2243619997868,8cyclictest2263673-21apt-get08:10:110
2243619997768,6cyclictest2338226-21apt-get12:00:120
224362499740,72cyclictest0-21swapper/211:43:592
2243622997467,5cyclictest2246667-21kworker/u8:1+flush-179:007:25:241
2243619997463,9cyclictest2261583-21apt-get08:05:000
2243619997463,9cyclictest2261583-21apt-get08:05:000
2243622997249,21cyclictest2293678-21latency_hist09:45:011
2243619997266,4cyclictest2282784-21kworker/u8:0+events_unbound09:35:190
2243622997162,7cyclictest2318339-21apt-get11:00:121
2243622997159,9cyclictest2301643-21apt-get10:10:001
2243622997149,19cyclictest2347776-21latency_hist12:30:011
2243622997148,20cyclictest2258376-21latency_hist07:55:011
2243619997160,9cyclictest2292347-21apt-get09:40:120
2243622997064,4cyclictest2277743-21latency_hist08:55:011
2243622997062,6cyclictest2245099-21latency_hist07:15:011
2243619997064,4cyclictest2251711-21kworker/u8:0+events_unbound07:45:120
2243619997062,6cyclictest2348031-21apt-get12:30:100
2243619997060,7cyclictest2243484-21latency_hist07:10:020
2243622996857,9cyclictest1213033-21systemd-journal11:20:001
2243619996863,4cyclictest2331301-21kworker/u8:1+events_unbound11:50:020
2243622996757,8cyclictest2268236-21kworker/u8:3+flush-179:008:55:181
2243622996757,7cyclictest2303480-21latency_hist10:15:011
2243619996660,4cyclictest2265260-21apt-get08:15:120
2243619996654,10cyclictest2289152-21apt-get09:30:100
2243622996559,4cyclictest2285727-21latency_hist09:20:011
2243619996458,5cyclictest2265040-21kworker/u8:0+flush-179:008:25:230
2243619996458,4cyclictest2282784-21kworker/u8:0+flush-179:009:25:160
2243622996354,7cyclictest2251726-21latency_hist07:35:021
2243619996355,6cyclictest2277778-21kworker/u8:1+flush-179:009:05:170
2243619996353,8cyclictest2322857-21apt-get11:15:000
2243622996255,5cyclictest2339615-21kworker/u8:1+flush-179:012:15:001
2243619996257,3cyclictest2306060-21kworker/u8:2+flush-179:010:25:170
2243619996256,4cyclictest2280976-21kworker/u8:2+flush-179:009:45:170
2243619996255,5cyclictest2298696-21kworker/u8:1+events_unbound10:15:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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