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2026-08-04 - 13:22
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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 Tue Aug 04, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
272272799141131,8cyclictest2710244-21kworker/u8:3+flush-179:019:15:010
272273199134123,8cyclictest2750484-21latency_hist20:35:011
272272799129122,5cyclictest2737974-21kworker/u8:0+events_unbound20:25:010
272273199128116,9cyclictest2752085-21latency_hist20:40:011
272272799127118,7cyclictest2769825-21kworker/u8:1+events_unbound22:05:000
272273199126118,5cyclictest2737974-21kworker/u8:0+flush-179:020:15:011
272272799125117,5cyclictest2747095-21kworker/u8:2+flush-179:020:30:000
272272799125114,8cyclictest2829119-21latency_hist00:40:010
272272799120112,5cyclictest2769825-21kworker/u8:1+events_unbound22:20:010
272273199117108,7cyclictest2814684-21kworker/u8:0+flush-179:000:20:011
272272799117112,4cyclictest2789004-21kworker/u8:0+events_unbound22:45:020
272273199116104,8cyclictest2755502-21kworker/u8:0+flush-179:021:05:231
2722727991150,113cyclictest1-21systemd21:10:010
272273199114101,10cyclictest2732213-21apt-get19:40:001
272272799113107,4cyclictest2789004-21kworker/u8:0+flush-179:023:20:160
272272799113104,6cyclictest2796890-21kworker/u8:2+events_unbound23:10:010
272273199111101,8cyclictest2819537-21latency_hist00:10:011
272272799111103,6cyclictest2816285-40logrotate00:00:010
27227319910898,8cyclictest2789004-21kworker/u8:0+flush-179:023:05:221
27227319910895,10cyclictest1213033-21systemd-journal19:55:001
27227319910892,12cyclictest2789004-21kworker/u8:0+flush-179:023:00:241
27227319910892,12cyclictest2789004-21kworker/u8:0+flush-179:023:00:231
27227319910395,6cyclictest2727423-21latency_hist19:25:011
27227319910394,6cyclictest2769825-21kworker/u8:1+flush-179:021:50:161
2722727991030,99cyclictest2730617-21anacron19:35:000
27227279910296,4cyclictest2819570-21kworker/u8:1+flush-179:000:15:210
27227279910195,4cyclictest2769851-21latency_hist21:35:020
27227279910195,4cyclictest2769851-21latency_hist21:35:010
27227279910092,6cyclictest2798531-21apt-get23:05:000
27227279910092,6cyclictest2798531-21apt-get23:05:000
27227279910091,6cyclictest2796890-21kworker/u8:2+flush-179:023:15:210
27227279910090,7cyclictest2734053-21latency_hist19:45:010
2722731999989,7cyclictest2803565-21latency_hist23:20:011
2722727999993,4cyclictest2730618-21kworker/u8:4+flush-179:019:35:150
2722727999790,5cyclictest2814684-21kworker/u8:0+flush-179:000:00:240
2722727999789,6cyclictest2750464-21kworker/u8:3+flush-179:020:50:000
2722727999786,6cyclictest2789004-21kworker/u8:0+flush-179:022:45:250
2722727999689,5cyclictest2789004-21kworker/u8:0+flush-179:022:50:260
2722731999590,4cyclictest2763514-21kworker/u8:2+flush-179:021:25:011
2722727999587,6cyclictest2763514-21kworker/u8:2+flush-179:021:20:260
2722731999486,5cyclictest2785831-21kworker/u8:3+flush-179:022:35:161
2722727999386,5cyclictest2758615-21kworker/u8:3+flush-179:021:15:170
2722731999177,11cyclictest1213033-21systemd-journal00:04:001
2722727999185,5cyclictest2796890-21kworker/u8:2+flush-179:023:10:260
2722727999185,4cyclictest2824362-21kworker/u8:3+flush-179:000:30:250
2722727999185,4cyclictest2789004-21kworker/u8:0+flush-179:023:30:240
2722727999184,5cyclictest2769825-21kworker/u8:1+flush-179:021:55:240
2722731999084,4cyclictest2769825-21kworker/u8:1+flush-179:021:40:171
2722731999083,4cyclictest2778490-21kworker/u8:2+events_unbound22:20:231
2722727999080,8cyclictest2734309-21apt-get19:45:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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