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2026-04-27 - 00:50
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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 Sun Apr 26, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
366124299119110,7cyclictest3701992-21latency_hist09:15:010
36612439910797,7cyclictest3768116-21latency_hist12:40:011
36612439910393,7cyclictest3719511-21latency_hist10:10:001
36612439910392,7cyclictest3661088-21kworker/u8:0+flush-179:007:39:591
3661243999482,9cyclictest3664339-21apt-get07:20:021
3661242999487,5cyclictest3741014-21kworker/u8:1+flush-179:011:15:250
3661242999286,5cyclictest3751950-21kworker/u8:0+flush-179:011:50:230
3661242999184,4cyclictest3684273-21kworker/u8:2+flush-179:009:30:010
3661242999183,5cyclictest3668056-21kworker/u8:3+events_unbound07:50:150
3661243999078,9cyclictest3716878-21diskstats10:00:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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