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2025-11-19 - 10:12
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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 Nov 19, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27747599120107,11cyclictest371543-40logrotate00:00:000
2774759910799,6cyclictest381192-21kworker/u8:2+events_unbound00:40:000
2774809910292,7cyclictest344238-21latency_hist22:35:011
277475999994,3cyclictest270346-21kworker/u8:3+events_unbound19:15:280
277480999582,9cyclictest382751-21latency_hist00:35:011
277475999382,8cyclictest350859-21latency_hist22:55:020
277475998982,5cyclictest350894-21kworker/u8:3+flush-179:023:05:000
277475998982,5cyclictest332071-21latency_hist22:00:010
277480998773,10cyclictest347431-21latency_hist22:45:011
277475998581,3cyclictest327334-21kworker/u8:2+flush-179:022:15:260
277475998379,3cyclictest261321-21kworker/u8:1+flush-179:019:25:260
277475998370,10cyclictest319338-21latency_hist21:20:010
277480997867,8cyclictest271-21systemd-journal23:55:001
277475997871,5cyclictest332110-21kworker/u8:0+events_unbound22:00:190
277475997569,5cyclictest297813-21kworker/u8:1+events_unbound20:10:280
277475997563,4cyclictest371616-21kworker/u8:1+events_unbound00:05:270
277480997463,8cyclictest349274-21latency_hist22:50:021
277475997466,6cyclictest297813-21kworker/u8:1+flush-179:020:25:010
277475997466,6cyclictest293534-21kworker/u8:0+events_unbound20:00:010
277475997466,6cyclictest293534-21kworker/u8:0+events_unbound20:00:010
277475997267,4cyclictest346103-21kworker/u8:2+events_unbound22:55:250
277475997267,4cyclictest321172-21kworker/u8:3+flush-179:021:45:250
277480997164,6cyclictest297813-21kworker/u8:1+events_unbound20:15:011
277475997155,4cyclictest309511-21kworker/u8:0+events_unbound20:50:230
277475997064,4cyclictest301572-21kworker/u8:0+flush-179:020:35:230
277480996959,8cyclictest317539-21kworker/u8:1+flush-179:021:40:011
27748199680,65cyclictest0-21swapper/222:20:592
277475996863,4cyclictest366364-21kworker/u8:0+events_unbound23:45:250
277480996759,5cyclictest285349-21latency_hist19:35:001
277480996759,5cyclictest285349-21latency_hist19:35:001
277475996758,7cyclictest360398-21kworker/u8:1+flush-179:023:35:290
277475996659,5cyclictest362450-21kworker/u8:3+events_unbound23:40:280
277475996656,7cyclictest296749-21latency_hist20:10:010
277480996554,8cyclictest312705-21latency_hist21:00:011
277475996559,4cyclictest288689-21kworker/u8:1+flush-179:019:50:230
277480996451,11cyclictest332069-21apt-get22:00:001
277475996459,4cyclictest368411-21kworker/u8:2+events_unbound00:04:010
277475996457,5cyclictest308201-21apt-get20:45:140
277480996356,4cyclictest301572-21kworker/u8:0+flush-179:020:25:221
277475996257,4cyclictest316132-21kworker/u8:0+events_unbound21:30:280
277475996257,4cyclictest277346-21kworker/u8:0+events_unbound19:20:180
277475996256,4cyclictest362450-21kworker/u8:3+events_unbound23:50:140
277475996251,9cyclictest381412-21apt-get00:30:130
277480996152,7cyclictest290642-21apt-get19:50:131
277480996151,8cyclictest379825-21apt-get00:25:131
277475996155,4cyclictest374824-21kworker/u8:0+flush-179:000:20:170
277475996154,6cyclictest339174-21kworker/u8:1+flush-179:022:40:000
277475996154,5cyclictest301572-21kworker/u8:0+events_unbound20:30:210
277483996058,1cyclictest0-21swapper/323:35:583
277475996045,12cyclictest340816-21apt-get22:25:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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