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2025-12-24 - 17:28
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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 Dec 24, 2025 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
376466999485,7cyclictest450118-21latency_hist11:00:010
376466999081,7cyclictest436754-21kworker/u8:0+flush-179:010:35:250
376466998475,6cyclictest415900-21kworker/u8:0+flush-179:009:20:210
376466998274,6cyclictest379570-21latency_hist07:20:020
376468998174,5cyclictest384364-21kworker/u8:2+flush-179:007:55:251
376466997970,7cyclictest392313-21latency_hist08:00:000
376468997870,5cyclictest429425-21latency_hist09:55:011
376466997768,6cyclictest431013-21latency_hist10:00:000
376466997768,6cyclictest431013-21latency_hist10:00:000
376466997565,8cyclictest466025-21latency_hist11:50:020
376466997469,3cyclictest461271-21kworker/u8:2+flush-179:011:40:200
376468997367,4cyclictest446931-21latency_hist10:50:011
376468997263,6cyclictest401841-21kworker/u8:1+flush-179:008:55:191
376468997262,7cyclictest424408-21latency_hist09:40:001
376466997265,5cyclictest446966-21kworker/u8:1+flush-179:010:50:240
376468997164,5cyclictest475838-21latency_hist12:20:011
376468997058,9cyclictest409820-21apt-get08:55:011
376468996861,5cyclictest436754-21kworker/u8:0+flush-179:010:55:011
376466996860,6cyclictest381188-21kworker/u8:3+flush-179:007:45:120
376466996860,6cyclictest381188-21kworker/u8:3+flush-179:007:45:120
376468996760,5cyclictest464442-21latency_hist11:45:011
376468996758,6cyclictest393911-21latency_hist08:05:011
376466996761,4cyclictest384364-21kworker/u8:2+flush-179:007:40:010
376466996757,8cyclictest411678-21latency_hist09:00:020
376466996655,8cyclictest440808-21/usr/sbin/munin10:30:250
376468996353,8cyclictest379821-21apt-get07:20:151
376468996257,4cyclictest479037-21kworker/u8:0+flush-179:012:30:001
376468996257,3cyclictest376383-21kworker/u8:1+flush-179:007:15:251
376468996146,13cyclictest401841-21kworker/u8:1+flush-179:009:14:511
376468995953,4cyclictest459115-21kworker/u8:0+flush-179:011:30:191
376466995952,5cyclictest401841-21kworker/u8:1+flush-179:008:31:020
376468995848,8cyclictest405311-21apt-get08:40:111
376468995847,8cyclictest376383-21kworker/u8:1+events_unbound07:25:211
376468995751,5cyclictest436754-21kworker/u8:0+flush-179:010:40:001
376466995749,6cyclictest458077-21latency_hist11:25:000
376466995749,6cyclictest458077-21latency_hist11:25:000
376466995739,17cyclictest434224-21kworker/u8:3+flush-179:010:15:260
376468995649,5cyclictest466054-21kworker/u8:0+flush-179:012:09:591
376468995646,8cyclictest400532-21apt-get08:25:121
376473995452,1cyclictest0-21swapper/312:21:593
376468995447,5cyclictest421470-21apt-get09:30:131
376468995444,8cyclictest381188-21kworker/u8:3+flush-179:007:54:591
376466995433,3cyclictest439608-21fschecks_time10:25:150
376468995347,4cyclictest479271-21apt-get12:30:131
376466995347,5cyclictest401841-21kworker/u8:1+flush-179:009:10:000
376466995347,4cyclictest422781-21kworker/u8:2+flush-179:009:35:200
376466995345,6cyclictest472649-21latency_hist12:10:010
376473995245,4cyclictest431028-21turbostat09:59:593
376473995245,4cyclictest431028-21turbostat09:59:593
376468995244,5cyclictest440566-21latency_hist10:30:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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