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2026-04-06 - 19:08
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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 06, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
279803899109100,6cyclictest2838337-21latency_hist09:15:000
2798043999988,8cyclictest2869353-21latency_hist10:50:001
2798038999789,7cyclictest2832016-21kworker/u8:0+events_unbound10:50:240
2798038999385,5cyclictest2814469-21latency_hist08:00:010
2798038998880,5cyclictest2806218-21kworker/u8:3+flush-179:007:40:220
2798038998880,5cyclictest2806218-21kworker/u8:3+flush-179:007:40:220
2798043998776,8cyclictest2856380-21apt-get10:10:001
2798038998579,4cyclictest2839943-21latency_hist09:20:020
2798038998476,6cyclictest2866174-21latency_hist10:40:000
2798043998376,5cyclictest2819244-21latency_hist08:15:011
2798038998377,4cyclictest2841520-21kworker/u8:1+events_unbound09:30:010
2798038998271,9cyclictest2846577-21apt-get09:40:030
2798038998173,5cyclictest2806218-21kworker/u8:3+flush-179:007:45:220
2798038998071,6cyclictest2858209-21latency_hist10:15:010
2798038998067,9cyclictest266-21systemd-journal08:30:010
2798038997971,5cyclictest2879254-21kworker/u8:0+flush-179:011:30:140
2798038997955,6cyclictest2812878-21latency_hist07:55:010
2798038997865,9cyclictest2825847-21kworker/u8:4+flush-179:008:40:220
2798038997863,11cyclictest2802748-21apt-get07:24:590
2798038997566,5cyclictest2138909-21kworker/u8:4+events_unbound07:25:250
2798038997565,7cyclictest2832016-21kworker/u8:0+flush-179:009:35:210
2798043997261,8cyclictest266-21systemd-journal11:15:011
2798038997265,4cyclictest2872777-21latency_hist11:00:010
2798038997263,7cyclictest2892205-21apt-get12:00:110
2798043997162,6cyclictest2880805-21latency_hist11:25:001
2798038997160,7cyclictest2825847-21kworker/u8:4+flush-179:008:50:210
2798043997058,9cyclictest2902031-21diskstats12:30:141
2798038997059,9cyclictest2887427-21apt-get11:45:110
2798043996961,6cyclictest2877849-21/usr/sbin/munin11:15:231
2798038996964,3cyclictest2876005-21kworker/u8:4+flush-179:012:15:230
2798038996958,8cyclictest2876005-21kworker/u8:4+flush-179:011:50:220
2798038996957,8cyclictest2876005-21kworker/u8:4+events_unbound11:35:150
2798043996756,9cyclictest2803235-21munin-node07:25:111
2798038996661,3cyclictest2850052-21kworker/u8:1+flush-179:009:50:260
2798038996656,8cyclictest2851841-21apt-get09:55:120
2798038996557,5cyclictest2874440-21latency_hist11:05:010
279804499640,62cyclictest0-21swapper/207:43:002
279804499640,62cyclictest0-21swapper/207:42:592
2798038996456,5cyclictest2867802-21kworker/u8:3+flush-179:011:20:150
2798038996355,5cyclictest2876005-21kworker/u8:4+flush-179:012:00:000
2798038996354,7cyclictest2816117-21kworker/u8:0+flush-179:008:20:220
2798038996354,6cyclictest2895118-21latency_hist12:10:010
2798038996354,6cyclictest2799541-21latency_hist07:15:010
2798038996254,6cyclictest2877610-21latency_hist11:15:010
2798038996249,9cyclictest2825602-21kworker/u8:0+events_unbound08:35:180
2798043996053,5cyclictest2806161-21kworker/u8:1+flush-179:007:35:201
2798038996051,6cyclictest2806218-21kworker/u8:3+flush-179:007:35:240
2798038995948,9cyclictest2866437-21apt-get10:40:120
2798038995853,4cyclictest2811338-21kworker/u8:2+flush-179:008:00:150
2798038995852,4cyclictest2854758-21kworker/u8:2+events_unbound10:05:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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