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2025-11-16 - 14:09
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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 20 highest latencies:
System rackeslot6.osadl.org (updated Sun Nov 16, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1736069910093,4cyclictest173523-21kworker/u8:3+flush-179:019:20:001
173606999685,8cyclictest273311-21latency_hist00:15:001
173604999683,10cyclictest183053-21apt-get19:40:000
173606999588,4cyclictest173523-21kworker/u8:3+events_unbound19:15:011
173606998780,5cyclictest224480-21kworker/u8:1+flush-179:022:30:011
173606998175,5cyclictest240152-21kworker/u8:0+events_unbound22:40:011
173606998069,8cyclictest223947-21latency_hist21:45:011
173604998073,5cyclictest207747-21kworker/u8:2+events_unbound21:00:240
173606997973,4cyclictest240152-21kworker/u8:0+events_unbound23:00:261
173604997972,5cyclictest207747-21kworker/u8:2+flush-179:021:15:010
173604997870,6cyclictest246488-21apt-get22:55:030
173606997770,5cyclictest198251-21kworker/u8:3+flush-179:021:10:011
173604997769,6cyclictest271-21systemd-journal20:29:590
173604997665,9cyclictest275178-21apt-get00:20:130
173606997569,4cyclictest219141-21kworker/u8:0+flush-179:021:40:001
173606997568,5cyclictest272391-21kworker/u8:2+flush-179:000:20:001
173604997567,6cyclictest258667-21latency_hist23:30:010
173606997467,5cyclictest228685-21kworker/u8:2+flush-179:022:00:001
173606997368,4cyclictest198251-21kworker/u8:3+flush-179:020:45:011
173606997368,4cyclictest160810-21kworker/u8:1+flush-179:019:55:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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