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2026-10-01 - 19:14
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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 rack8slot7.osadl.org (updated Thu Oct 01, 2026 12:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
315989910491046,1cyclictest18902-21kworker/3:2+events10:46:583
315819910481046,2cyclictest576-21turbostat12:14:550
315899910461044,2cyclictest14129-21turbostat09:09:551
315989910451044,1cyclictest19798-21turbostat08:04:553
315949910451043,2cyclictest3371-21turbostat11:44:552
315819910451043,2cyclictest23414-21turbostat09:54:560
315899910431041,2cyclictest566-21turbostat11:09:551
315989910411040,1cyclictest18902-21kworker/3:2+events11:51:063
315989910381037,1cyclictest11335-21kworker/3:1+events09:17:203
315949910371036,1cyclictest9284-21kworker/2:1+events12:33:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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