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2026-08-08 - 17:49
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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 10 highest latencies:
System rackfslot7.osadl.org (updated Sat Aug 08, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
821217991710,0cyclictest0-21swapper/110:40:121
821223991251,1cyclictest0-21swapper/710:40:127
82121799760,57cyclictest976679-21grep11:50:191
821217997233,38cyclictest930113-21latency10:25:191
82121999710,1cyclictest0-21swapper/310:40:123
821217997132,39cyclictest0-21swapper/108:31:391
821217997012,39cyclictest918007-21munin-run10:05:011
821217997012,39cyclictest858213-21irqstats08:15:191
821217996830,38cyclictest851595-21kworker/u32:0+flush-8:008:10:121
821217996829,39cyclictest0-21swapper/107:39:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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