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2025-07-12 - 12:49
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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 20 highest latencies:
System rackeslot6.osadl.org (updated Sat Jul 12, 2025 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
210993199131119,5cyclictest2204742-21kworker/u8:1+events_unbound00:04:020
210993199111105,5cyclictest2135585-21kworker/u8:0+events_unbound20:30:020
21099339910289,10cyclictest2203151-40logrotate00:00:011
21099339910289,10cyclictest2203151-40logrotate00:00:011
21099319910095,4cyclictest2186947-21kworker/u8:0+events_unbound23:10:280
2109933999889,6cyclictest2119420-21kworker/u8:2+events_unbound19:45:291
2109933999889,6cyclictest2119420-21kworker/u8:2+events_unbound19:45:281
2109931999686,8cyclictest2207961-21latency_hist00:15:010
2109933999584,8cyclictest2121197-21kworker/u8:1+flush-179:020:00:001
2109933999584,4cyclictest2174276-21kworker/u8:2+events_unbound22:30:151
2109933999486,6cyclictest2109827-21kworker/u8:0+events_unbound19:25:251
2109933999486,6cyclictest2109827-21kworker/u8:0+events_unbound19:20:001
2109933999385,5cyclictest2211199-21kworker/u8:2+flush-179:000:30:231
2109933999181,4cyclictest2165483-21kworker/u8:0+events_unbound22:15:291
2109931999185,4cyclictest2156770-21kworker/u8:2+flush-179:021:35:230
2109933999083,5cyclictest2190126-21kworker/u8:3+events_unbound23:25:131
2109933999081,7cyclictest3105085-21systemd-journal20:45:011
2109933999077,10cyclictest2150361-21apt-get21:15:131
2109931999085,4cyclictest2179063-21kworker/u8:3+events_unbound22:50:190
2109931999085,4cyclictest2109827-21kworker/u8:0+events_unbound19:10:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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