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2026-05-10 - 18:28
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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 Sun May 10, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4134989910595,8cyclictest451110-21latency_hist09:05:010
4134989910595,8cyclictest451110-21latency_hist09:05:000
4135029910291,9cyclictest519277-21apt-get12:34:591
413502999585,7cyclictest1213033-21systemd-journal08:55:001
413498999486,6cyclictest476584-21latency_hist10:25:010
413498999486,6cyclictest476584-21latency_hist10:25:000
413502998881,5cyclictest364165-21kworker/u8:1+flush-179:007:15:241
413502998678,6cyclictest499644-21latency_hist11:35:021
413502998677,6cyclictest437591-21latency_hist08:25:001
413502998576,6cyclictest462268-21latency_hist09:40:011
413502998473,8cyclictest455849-21kworker/u8:0+flush-179:010:10:221
413502998374,6cyclictest429377-21latency_hist08:00:011
413498998169,9cyclictest446067-21latency_hist08:50:010
413502998074,4cyclictest421353-21kworker/u8:0+events_unbound07:40:001
413502998072,5cyclictest441012-21kworker/u8:2+flush-179:009:10:141
413502997969,8cyclictest441542-21apt-get08:35:131
413502997867,8cyclictest478178-21apt-get10:30:001
413502997664,8cyclictest1213033-21systemd-journal07:14:041
413498997666,7cyclictest486387-21latency_hist10:55:000
413502997467,5cyclictest521125-21latency_hist12:40:001
413502997465,7cyclictest421358-21kworker/u8:2+flush-179:007:35:011
413502997364,7cyclictest441012-21kworker/u8:2+flush-179:008:55:261
413502997364,6cyclictest481626-21latency_hist10:40:011
413502997364,6cyclictest444482-21latency_hist08:45:001
413502997363,6cyclictest498292-21kworker/u8:1+flush-179:011:55:151
413502997363,6cyclictest498292-21kworker/u8:1+flush-179:011:55:151
413498997257,12cyclictest1213033-21systemd-journal11:30:000
413502997057,7cyclictest421353-21kworker/u8:0+flush-179:008:25:011
413498997064,4cyclictest506931-21kworker/u8:0+flush-179:012:00:010
413498997064,4cyclictest506931-21kworker/u8:0+flush-179:012:00:010
413498997064,4cyclictest493033-21apt-get11:15:030
413498997060,7cyclictest493033-21apt-get11:14:590
413502996658,5cyclictest468864-21/usr/sbin/munin10:00:231
413502996655,8cyclictest434151-21apt-get08:15:031
413502996555,8cyclictest501507-21apt-get11:40:111
413502996361,1cyclictest271rcuc/111:54:591
413502996352,9cyclictest475254-21apt-get10:20:111
413502996352,9cyclictest475254-21apt-get10:20:101
413498996352,8cyclictest465687-21apt-get09:50:090
413498996352,8cyclictest1213033-21systemd-journal10:45:010
413502996255,5cyclictest441012-21kworker/u8:2+flush-179:008:50:001
413498996253,7cyclictest449485-21kworker/u8:1+flush-179:009:05:220
413502996152,6cyclictest491471-21kworker/u8:3+events_unbound11:20:171
413502996152,6cyclictest364165-21kworker/u8:1+flush-179:007:25:271
413502996151,7cyclictest430943-21kworker/u8:1+events_unbound08:15:011
413511996058,1cyclictest0-21swapper/312:35:003
413502996053,5cyclictest455849-21kworker/u8:0+flush-179:010:10:011
413498996053,5cyclictest498292-21kworker/u8:1+flush-179:011:40:000
413498996051,7cyclictest426216-21kworker/u8:3+flush-179:008:00:150
413502995951,6cyclictest413456-21kworker/u8:3+flush-179:007:20:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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