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2026-04-06 - 16:09
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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 10 highest latencies:
System rackeslot6.osadl.org (updated Mon Apr 06, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
279803899109100,6cyclictest2838337-21latency_hist09:15:000
2798043999988,8cyclictest2869353-21latency_hist10:50:001
2798038999789,7cyclictest2832016-21kworker/u8:0+events_unbound10:50:240
2798038999385,5cyclictest2814469-21latency_hist08:00:010
2798038998880,5cyclictest2806218-21kworker/u8:3+flush-179:007:40:220
2798038998880,5cyclictest2806218-21kworker/u8:3+flush-179:007:40:220
2798043998776,8cyclictest2856380-21apt-get10:10:001
2798038998579,4cyclictest2839943-21latency_hist09:20:020
2798038998476,6cyclictest2866174-21latency_hist10:40:000
2798043998376,5cyclictest2819244-21latency_hist08:15:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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