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2026-05-28 - 10:43
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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 Thu May 28, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
261645999134108,22cyclictest2651627-21latency_hist21:00:021
261645999134108,22cyclictest2651627-21latency_hist21:00:011
261645799124113,8cyclictest2710256-40mandb00:00:000
26164579910897,8cyclictest2634125-21latency_hist20:05:020
26164599910696,7cyclictest2715298-21kworker/u8:2+flush-179:000:15:251
26164579910292,8cyclictest2654804-21latency_hist21:10:020
26164579910089,8cyclictest2689007-21latency_hist22:55:010
2616457999992,5cyclictest2672812-21kworker/u8:0+flush-179:022:15:020
2616459999583,9cyclictest1213033-21systemd-journal23:25:011
2616459999487,4cyclictest2621369-21kworker/u8:0+flush-179:019:25:221
2616459998978,8cyclictest1213033-21systemd-journal20:35:001
2616457998881,5cyclictest2659329-21kworker/u8:2+flush-179:022:30:020
2616457998779,5cyclictest2686856-21kworker/u8:0+flush-179:022:50:010
2616457998674,9cyclictest1213033-21systemd-journal19:55:000
2616459998572,11cyclictest2616260-21kworker/u8:1+events_unbound19:20:011
2616457998476,5cyclictest2703835-21kworker/u8:2+events_unbound23:45:010
2616459998375,6cyclictest2711904-21apt-get00:05:001
2616459998375,5cyclictest2638897-21latency_hist20:20:001
2616459998374,7cyclictest2679441-21kworker/u8:1+flush-179:022:55:001
2616459998272,7cyclictest2720081-21kworker/u8:1+flush-179:000:30:001
2616457998273,6cyclictest2695377-21latency_hist23:15:010
2616459998172,6cyclictest1213033-21systemd-journal20:15:001
2616457998171,7cyclictest2715298-21kworker/u8:2+flush-179:000:15:230
2616457998171,7cyclictest2635709-21latency_hist20:10:010
2616459997974,3cyclictest1-21systemd00:10:011
2616457997970,6cyclictest2659329-21kworker/u8:2+flush-179:021:40:180
2616459997662,12cyclictest2695412-21kworker/u8:3+flush-179:023:25:151
2616457997655,9cyclictest2619803-21apt-get19:20:110
2616457997565,6cyclictest1213033-21systemd-journal00:35:000
2616457997468,4cyclictest2705443-21kworker/u8:1+flush-179:000:10:220
2616459997361,9cyclictest2710225-40logrotate00:00:011
2616457997367,4cyclictest2695412-21kworker/u8:3+flush-179:023:20:200
2616457997266,4cyclictest2716965-21kworker/u8:0+flush-179:000:20:210
2616459997061,7cyclictest2715298-21kworker/u8:2+events_unbound00:15:021
2616459997059,8cyclictest2684250-21latency_hist22:40:011
2616459997058,10cyclictest2654813-21apt-get21:10:001
2616457997064,5cyclictest2698812-21kworker/u8:0+flush-179:023:30:160
2616457997061,6cyclictest2624308-21latency_hist19:35:000
2616457996958,9cyclictest2642331-21apt-get20:30:120
2616457996862,4cyclictest2674677-21apt-get22:10:100
2616457996862,4cyclictest2659329-21kworker/u8:2+flush-179:021:30:220
2616457996857,4cyclictest2651599-21kworker/u8:0+events_unbound21:10:010
261645799680,65cyclictest0-21swapper/020:58:590
261645799680,65cyclictest0-21swapper/020:58:590
2616457996759,6cyclictest2648439-21latency_hist20:50:010
2616457996753,10cyclictest1213033-21systemd-journal20:45:000
2616459996652,8cyclictest2617927-21kworker/u8:2+flush-179:019:50:201
2616457996660,4cyclictest2616260-21kworker/u8:1+flush-179:019:10:150
2616457996656,8cyclictest2698812-21kworker/u8:0+events_unbound23:35:210
2616457996656,8cyclictest2651599-21kworker/u8:0+flush-179:021:15:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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