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2026-07-11 - 03:54
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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 Sat Jul 11, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
45082899134119,11cyclictest1213033-21systemd-journal21:20:001
45082599134123,8cyclictest484654-21latency_hist20:55:000
45082899121111,7cyclictest500579-21latency_hist21:45:021
45082599121112,6cyclictest534338-21kworker/u8:2+flush-179:023:50:000
45082599119111,5cyclictest524694-21apt-get22:57:210
45082899118109,7cyclictest1213033-21systemd-journal20:10:011
45082599116107,7cyclictest450691-21latency_hist19:10:020
4508289911589,8cyclictest489688-21apt-get21:10:111
45082899115110,4cyclictest480135-21kworker/u8:0+events_unbound21:05:001
45082599113104,6cyclictest481532-21kworker/u8:3+flush-179:021:29:590
45082899112106,4cyclictest517790-21kworker/u8:3+flush-179:023:35:231
45082899112105,5cyclictest533821-21kworker/u8:1+events_unbound23:45:001
4508259911299,9cyclictest1213033-21systemd-journal23:15:250
4508259911097,10cyclictest1213033-21systemd-journal00:00:000
4508289910898,8cyclictest453928-21latency_hist19:20:011
4508289910696,7cyclictest449232-21kworker/u8:3+flush-179:019:40:001
4508259910692,11cyclictest1213033-21systemd-journal23:30:010
4508259910692,11cyclictest1213033-21systemd-journal23:30:010
4508289910498,4cyclictest466087-21kworker/u8:2+events_unbound20:40:011
4508289910496,5cyclictest500623-21kworker/u8:0+flush-179:022:10:161
4508289910194,5cyclictest519968-21kworker/u8:0+events_unbound22:55:001
4508289910092,6cyclictest478269-21kworker/u8:1+flush-179:021:00:011
450828999891,6cyclictest551213-21kworker/u8:2+flush-179:000:30:001
450828999690,5cyclictest481532-21kworker/u8:3+flush-179:021:50:011
450828999690,4cyclictest519968-21kworker/u8:0+events_unbound23:15:241
450828999689,4cyclictest471518-21cp20:14:591
450825999690,4cyclictest513599-21kworker/u8:1+flush-179:022:25:220
450825999685,7cyclictest466087-21kworker/u8:2+flush-179:020:00:010
450828999487,5cyclictest461353-21kworker/u8:0+events_unbound20:00:241
450828999386,5cyclictest500623-21kworker/u8:0+flush-179:021:50:191
450828999386,5cyclictest500623-21kworker/u8:0+flush-179:021:50:191
450828999382,9cyclictest543887-40mandb00:00:001
450825999384,6cyclictest461353-21kworker/u8:0+flush-179:020:00:230
450828999287,4cyclictest517790-21kworker/u8:3+flush-179:023:10:001
450828999286,5cyclictest519968-21kworker/u8:0+events_unbound22:50:011
450828999285,5cyclictest519968-21kworker/u8:0+events_unbound23:00:011
450828999283,6cyclictest516976-21kworker/u8:0+flush-179:022:35:211
450828999184,5cyclictest461353-21kworker/u8:0+flush-179:020:25:261
450828999183,6cyclictest533821-21kworker/u8:1+flush-179:000:04:001
450828999083,5cyclictest508766-21kworker/u8:3+flush-179:022:20:161
450825998981,5cyclictest449232-21kworker/u8:3+flush-179:019:35:160
450828998882,4cyclictest461353-21kworker/u8:0+events_unbound19:50:011
450828998874,11cyclictest443517-21kworker/u8:2+events_unbound19:25:211
450828998680,4cyclictest461353-21kworker/u8:0+flush-179:020:20:211
450828998578,5cyclictest480135-21kworker/u8:0+flush-179:021:05:261
450825998576,6cyclictest550291-21latency_hist00:20:020
450825998473,8cyclictest483070-21latency_hist20:50:010
450825998375,6cyclictest547348-21apt-get00:10:090
450825998373,7cyclictest545508-21latency_hist00:05:010
450828998275,6cyclictest533821-21kworker/u8:1+flush-179:000:25:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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